/* Kristian Sainovic site v10 · shared styles (moved out of the v8 page). */
/* Layout: a dark titanium-and-glass world. Graphite ground, satin titanium as the only
   accent, glass panels for anything raised. Serif carries the voice, Geist the work,
   mono the data. Colour stays restrained; the warm light belongs to the old company. */
:root {
  color-scheme: dark;
  --sc-canvas:     #08090b;
  --sc-surface:    #121418;
  --sc-ink:        #eceef0;
  --sc-ink-soft:   #959ba3;
  --sc-accent:     #c3ccd6;   /* satin titanium */
  --sc-accent-ink: #0b0d10;
  --sc-font-display: "Newsreader", "Iowan Old Style", Georgia, serif;
  --sc-font-text:    "Geist", "Helvetica Neue", Arial, system-ui, sans-serif;
  --sc-font-mono:    "Geist Mono", ui-monospace, Menlo, monospace;
  --sc-shadow-color: 220 20% 2%;
  --sc-leading-body: 1.7;
  --sc-track-tight: -0.03em;

  --k-warm: #e0a86a;          /* lamplight of the old company, era 1 only */
  --k-ti-hi: #f1f4f7;
  --k-ti-lo: #9aa3ad;
  --k-glass: color-mix(in oklab, var(--sc-surface) 58%, transparent);
  --k-ease-spring: linear(0, 0.009, 0.035 2.1%, 0.141 4.4%, 0.723 12.9%, 0.938 16.7%, 1.017 19.4%, 1.067, 1.099 24.3%, 1.108 26%, 1.1 27.9%, 1.06 32.3%, 1.019 36.7%, 0.998 41.3%, 0.991 46.6%, 1.001 63.6%, 1);
  --k-ease-fallback: cubic-bezier(0.34, 1.56, 0.64, 1);
  --k-spring: 520ms var(--k-ease-fallback);

  /* depth: base (page), elevated (cards), floating (HUD, nav, chips) */
  --k-edge: inset 0 1px 0 rgb(255 255 255 / .07), inset 0 0 0 1px rgb(255 255 255 / .06);
  --k-elev: var(--k-edge), 0 1px 2px hsl(220 20% 2% / .35), 0 14px 32px -12px hsl(220 25% 2% / .6);
  --k-float: var(--k-edge), 0 2px 6px hsl(220 20% 2% / .35), 0 24px 56px -16px hsl(220 30% 2% / .75);
}
.em {
  font-style: italic;
  background: linear-gradient(100deg, var(--k-ti-hi), var(--k-ti-lo) 70%);
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.label { font-family: var(--sc-font-mono); font-size: var(--sc-t-xs); letter-spacing: 0.14em; text-transform: uppercase; color: var(--sc-ink-soft); display: inline-flex; align-items: center; gap: var(--sc-3); margin: 0; }
.label::before { content: ""; width: 1.6rem; height: 1px; background: linear-gradient(90deg, var(--sc-accent), transparent); }
.glass {
  background: var(--k-glass);
  backdrop-filter: blur(14px) saturate(1.2); -webkit-backdrop-filter: blur(14px) saturate(1.2);
  box-shadow: var(--k-float);
}

/* --------------------------------------------------------------- nav -- */
.bar {
  position: fixed; inset: 0 0 auto 0; z-index: var(--sc-z-chrome);
  padding: calc(env(safe-area-inset-top, 0px) + var(--sc-4)) var(--sc-gutter) var(--sc-4);
  display: flex; align-items: center; justify-content: space-between; gap: var(--sc-5);
  background: linear-gradient(to bottom, color-mix(in oklab, var(--sc-canvas) 82%, transparent), transparent);
}
.brand { display: inline-flex; align-items: center; gap: var(--sc-3); text-decoration: none; color: var(--sc-ink); }
.brand__mono {
  width: 2.1rem; height: 2.1rem; border-radius: 0.6rem; display: grid; place-items: center;
  font-family: var(--sc-font-display); font-size: 0.95rem; color: var(--sc-accent-ink);
  background: linear-gradient(140deg, var(--k-ti-hi), var(--k-ti-lo));
  box-shadow: inset 0 1px 0 rgb(255 255 255 / .6), 0 6px 16px -6px rgb(0 0 0 / .6);
  transition: transform var(--k-spring); transition-timing-function: var(--k-ease-spring);
}
.brand:hover .brand__mono { transform: rotate(-6deg) scale(1.05); }
.brand:active .brand__mono { transform: scale(0.94); }
.brand__name { font-weight: 500; font-size: var(--sc-t-sm); letter-spacing: -0.01em; }
.brand__role { display: block; font-size: 0.72rem; color: var(--sc-ink-soft); font-weight: 400; }
@media (max-width: 440px) { .brand__role { display: none; } }
.nav { display: none; gap: var(--sc-6); font-size: var(--sc-t-sm); }
@media (min-width: 960px) { .nav { display: flex; } }
.nav a { position: relative; text-decoration: none; color: var(--sc-ink-soft); padding-block: var(--sc-1); transition: opacity var(--sc-d-fast) var(--sc-ease-out); }
.nav a::after { content: ""; position: absolute; left: 0; right: 0; bottom: -2px; height: 1px; background: var(--sc-accent); transform: scaleX(0); transform-origin: right; transition: transform 420ms var(--sc-ease-out); }
.nav a:hover { color: var(--sc-ink); }
.nav a:hover::after { transform: scaleX(1); transform-origin: left; }
.nav a:active { opacity: 0.7; }

.btn {
  display: inline-flex; align-items: center; gap: var(--sc-3);
  padding: 0.7rem 1.2rem; border-radius: var(--sc-r-pill);
  font-size: var(--sc-t-sm); font-weight: 500; text-decoration: none; white-space: nowrap;
  transition: transform var(--k-spring), opacity var(--sc-d-fast) var(--sc-ease-out);
  transition-timing-function: var(--k-ease-spring);
}
.btn--ti {
  color: var(--sc-accent-ink);
  background: linear-gradient(160deg, var(--k-ti-hi) 0%, #cfd6dd 45%, var(--k-ti-lo) 100%);
  box-shadow: inset 0 1px 0 rgb(255 255 255 / .7), inset 0 -1px 0 rgb(0 0 0 / .18), 0 2px 4px rgb(0 0 0 / .35), 0 16px 34px -14px rgb(180 195 215 / .35);
}
.btn--ghost { color: var(--sc-ink); box-shadow: inset 0 0 0 1px var(--sc-hairline-strong); background: color-mix(in oklab, var(--sc-surface) 40%, transparent); backdrop-filter: blur(8px); -webkit-backdrop-filter: blur(8px); }
.btn:hover { transform: translateY(-2px); }
.btn:active { transform: translateY(0) scale(0.97); transition-duration: 110ms; }
.btn .arr { display: inline-block; transition: transform var(--k-spring); transition-timing-function: var(--k-ease-spring); }
.btn:hover .arr { transform: translateX(3px); }

/* ------------------------------------------- film · the background -- */
/* One fixed stage for the whole page. Every clip is mounted once and
   cross-fades by opacity; the chapters scroll over it in normal flow. */
.film { position: fixed; inset: 0; z-index: 0; overflow: clip; pointer-events: none; background: var(--sc-canvas); }
.film video { position: absolute; inset: 0; z-index: 0; width: 100%; height: 100%; object-fit: cover; opacity: 0; will-change: opacity; }
.film__shade { position: absolute; inset: 0; z-index: 1; background: linear-gradient(90deg, rgb(8 9 11 / .9) 0%, rgb(8 9 11 / .74) 30%, rgb(8 9 11 / .4) 52%, rgb(8 9 11 / .18) 72%), linear-gradient(180deg, rgb(8 9 11 / .35) 0%, rgb(8 9 11 / 0) 22%, rgb(8 9 11 / 0) 70%, rgb(8 9 11 / .45) 100%); }
.film__dim { position: absolute; inset: 0; z-index: 2; background: rgb(8 9 11); opacity: var(--film-dim, 0); transition: opacity 600ms var(--sc-ease-out); }
@media (max-width: 960px) { .film__shade { background: linear-gradient(180deg, rgb(8 9 11 / .88) 0%, rgb(8 9 11 / .7) 50%, rgb(8 9 11 / .35) 100%); } }
.chapter__copy { text-shadow: 0 1px 2px rgb(0 0 0 / .45), 0 2px 18px rgb(0 0 0 / .4); }
main { position: relative; z-index: 1; }

/* ---------------------------------------------- 1 · the company -- */
.chapter { min-height: 115vh; position: relative; }
.chapter--short { min-height: 100vh; }
.chapter--single { min-height: 190vh; }
.chapter--firms { min-height: 150vh; }
.film.past video { transition: opacity 700ms var(--sc-ease-out); }
.chapter__copy { position: sticky; top: clamp(6.5rem, 18vh, 11rem); margin-left: var(--sc-gutter); width: min(34rem, 44vw); display: grid; gap: var(--sc-4); padding-bottom: 30vh; }
.chapter h1 { max-width: 11ch; }
.chapter h1 { font-family: var(--sc-font-display); font-weight: 500; font-size: clamp(3rem, 1.2rem + 4.2vw, 5.4rem); line-height: 0.98; letter-spacing: -0.03em; margin: 0; text-wrap: balance; }
.chapter h2 { font-family: var(--sc-font-display); font-weight: 500; font-size: var(--sc-t-3xl); line-height: 1; letter-spacing: -0.03em; margin: 0; text-wrap: balance; }
.chapter p.lede { margin: 0; font-size: var(--sc-t-lg); line-height: 1.55; color: color-mix(in oklab, var(--sc-ink) 86%, var(--sc-canvas)); max-width: 36ch; text-shadow: 0 1px 18px rgb(0 0 0 / .6); }
.actions { display: flex; flex-wrap: wrap; gap: var(--sc-3); margin-top: var(--sc-2); }
.era-1 .label { color: var(--k-warm); }
.era-1 .label::before { background: linear-gradient(90deg, var(--k-warm), transparent); }

/* before / after: two lines share one grid cell, the script picks one */
.swap { display: grid; }
.swap > * { grid-area: 1 / 1; transition: opacity 450ms var(--sc-ease-out), translate 450ms var(--sc-ease-out); }
.swap > [data-state="after"] { opacity: 0; translate: 0 0.4rem; }
.is-after .swap > [data-state="after"] { opacity: 1; translate: 0 0; }
.is-after .swap > [data-state="before"] { opacity: 0; translate: 0 -0.4rem; }
.state { display: inline-flex; gap: 0.25rem; padding: 0.25rem; border-radius: var(--sc-r-pill); width: max-content; }
.state button { appearance: none; border: 0; background: none; cursor: pointer; font-family: var(--sc-font-mono); font-size: 0.66rem; letter-spacing: 0.12em; text-transform: uppercase; padding: 0.3rem 0.65rem; border-radius: var(--sc-r-pill); color: var(--sc-ink-soft); transition: background 400ms var(--sc-ease-out), color 400ms var(--sc-ease-out); }
.state button:first-child { background: color-mix(in oklab, var(--k-warm) 22%, transparent); color: var(--k-warm); }
.is-after .state button:first-child { background: none; color: var(--sc-ink-soft); }
.is-after .state button:last-child { background: color-mix(in oklab, var(--sc-accent) 20%, transparent); color: var(--sc-ink); }
.modes { display: flex; flex-wrap: wrap; gap: var(--sc-2); list-style: none; margin: 0; padding: 0; }
.modes li { font-family: var(--sc-font-mono); font-size: 0.72rem; letter-spacing: 0.1em; text-transform: uppercase; padding: 0.4rem 0.8rem; border-radius: var(--sc-r-pill); color: var(--sc-ink-soft); box-shadow: inset 0 0 0 1px var(--sc-hairline-strong); transition: color 400ms, background 400ms; }
.modes li.on { color: var(--sc-accent-ink); background: linear-gradient(160deg, var(--k-ti-hi), var(--k-ti-lo)); box-shadow: none; }

.hud {
  position: fixed; z-index: var(--sc-z-copy); right: var(--sc-gutter); bottom: calc(clamp(1.5rem, 6vh, 3.5rem) + env(safe-area-inset-bottom, 0px));
  display: grid; grid-template-columns: repeat(3, auto); gap: var(--sc-6);
  padding: var(--sc-4) var(--sc-5); border-radius: 1rem;
  transition: opacity 500ms var(--sc-ease-out), translate 500ms var(--sc-ease-out);
}
.hud[data-off] { opacity: 0; translate: 0 1rem; pointer-events: none; }
.hud__cell { display: grid; gap: var(--sc-1); min-width: 6.5rem; }
.hud__k { font-family: var(--sc-font-mono); font-size: 0.66rem; letter-spacing: 0.12em; text-transform: uppercase; color: var(--sc-ink-soft); }
.hud__v { font-family: var(--sc-font-display); font-size: var(--sc-t-xl); line-height: 1; letter-spacing: -0.02em; font-variant-numeric: tabular-nums; }
.hud__note { position: absolute; right: var(--sc-5); top: calc(100% + 0.4rem); font-family: var(--sc-font-mono); font-size: 0.62rem; letter-spacing: 0.08em; color: color-mix(in oklab, var(--sc-ink-soft) 70%, transparent); white-space: nowrap; }
@media (max-width: 960px) {
  .chapter__copy { top: calc(env(safe-area-inset-top, 0px) + 5.5rem); width: auto; margin-right: var(--sc-gutter); }
  .chapter h1 { font-size: clamp(2.6rem, 11vw, 3.6rem); }
  .chapter h2 { font-size: clamp(2rem, 8.6vw, 2.8rem); }
  .chapter p.lede { font-size: var(--sc-t-base); }
  .hud { left: var(--sc-gutter); grid-template-columns: repeat(3, minmax(0, 1fr)); gap: var(--sc-3); padding: var(--sc-3) var(--sc-4); }
  .hud__cell { min-width: 0; }
  .hud__v { font-size: var(--sc-t-lg); }
}
/* the later sections sit on a darkened film, so give flow text its own ground */
.sc-section { position: relative; }
/* --------------------------------------------------------- 2 · proof -- */
.proof { display: grid; place-items: center; text-align: center;
  background: radial-gradient(50rem 32rem at 50% 50%, color-mix(in oklab, var(--sc-accent) 7%, transparent), transparent 70%); }
.proof__inner { display: grid; justify-items: center; gap: var(--sc-5); padding-inline: var(--sc-gutter); max-width: 60rem; }
.clock { white-space: nowrap; display: flex; align-items: baseline; justify-content: center; gap: clamp(0.8rem, 3vw, 2.4rem); font-family: var(--sc-font-display); font-weight: 400; line-height: 0.9; letter-spacing: -0.04em; }
.clock__from { font-size: clamp(2.2rem, 1rem + 4vw, 4.6rem); color: var(--sc-ink-soft); text-decoration: line-through; text-decoration-thickness: 2px; text-decoration-color: color-mix(in oklab, var(--sc-ink-soft) 60%, transparent); }
.clock__arrow { font-family: var(--sc-font-text); font-size: var(--sc-t-xl); color: var(--sc-ink-soft); }
.clock__to { font-size: clamp(5rem, 2rem + 13vw, 13rem); }
.clock__to small { font-size: 0.32em; letter-spacing: -0.01em; margin-left: 0.08em; }
.proof p { margin: 0; color: color-mix(in oklab, var(--sc-ink) 80%, var(--sc-canvas)); max-width: 52ch; }
.proof .fine { font-size: var(--sc-t-xs); color: var(--sc-ink-soft); font-family: var(--sc-font-mono); letter-spacing: 0.04em; }
.proof .label { position: absolute; top: clamp(6rem, 16vh, 9rem); left: 50%; translate: -50% 0; }

/* --------------------------------------------------------- 3 · about -- */
.about { display: grid; gap: var(--sc-8); grid-template-columns: minmax(0, 1fr); }
@media (min-width: 960px) { .about { grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: var(--sc-9); } }
.statement { font-family: var(--sc-font-display); font-weight: 500; font-size: var(--sc-t-3xl); line-height: 1.02; letter-spacing: -0.03em; margin: 0; text-wrap: balance; }
.prose { display: grid; gap: var(--sc-4); }
.prose p { margin: 0; color: color-mix(in oklab, var(--sc-ink) 76%, var(--sc-canvas)); max-width: 54ch; }
.timeline { list-style: none; margin: var(--sc-4) 0 0; padding: 0; display: grid; }
.timeline li { display: grid; grid-template-columns: 8.5rem minmax(0, 1fr); gap: var(--sc-5); padding-block: var(--sc-5); border-top: 1px solid var(--sc-hairline); }
.timeline li:last-child { border-bottom: 1px solid var(--sc-hairline); }
.timeline .when { font-family: var(--sc-font-mono); font-size: var(--sc-t-xs); color: var(--sc-accent); letter-spacing: 0.06em; padding-top: 0.25em; }
.timeline strong { display: block; font-weight: 500; }
.timeline span { color: var(--sc-ink-soft); font-size: var(--sc-t-sm); }
@media (max-width: 560px) { .timeline li { grid-template-columns: minmax(0, 1fr); gap: var(--sc-1); } }
.tags { display: flex; flex-wrap: wrap; gap: var(--sc-2); list-style: none; margin: 0; padding: 0; }
.tags li { font-family: var(--sc-font-mono); font-size: 0.72rem; letter-spacing: 0.04em; padding: 0.35rem 0.7rem; border-radius: var(--sc-r-pill); color: var(--sc-ink-soft); box-shadow: inset 0 0 0 1px var(--sc-hairline-strong); }
.toolkit { display: grid; gap: var(--sc-3); margin-top: var(--sc-5); }
.principles { list-style: none; margin: var(--sc-2) 0 0; padding: 0; display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: var(--sc-4) var(--sc-5); }
.principles li { display: grid; gap: var(--sc-1); padding-top: var(--sc-3); border-top: 1px solid var(--sc-hairline); }
.principles b { font-weight: 500; font-size: var(--sc-t-sm); }
.principles span { color: var(--sc-ink-soft); font-size: var(--sc-t-sm); }
@media (max-width: 560px) { .principles { grid-template-columns: minmax(0, 1fr); } }
.skills { margin: 0; display: grid; grid-template-columns: 9rem minmax(0, 1fr); gap: var(--sc-3) var(--sc-5); font-size: var(--sc-t-sm); }
.skills dt { color: var(--sc-accent); font-family: var(--sc-font-mono); font-size: var(--sc-t-xs); letter-spacing: 0.04em; padding-top: 0.15em; }
.skills dd { margin: 0; color: var(--sc-ink-soft); }
@media (max-width: 560px) { .skills { grid-template-columns: minmax(0, 1fr); gap: var(--sc-1); } .skills dd { margin-bottom: var(--sc-3); } }

/* ---------------------------------------------------------- 4 · help -- */
.help { display: flex; align-items: center; background: radial-gradient(46rem 30rem at 25% 55%, color-mix(in oklab, var(--sc-accent) 6%, transparent), transparent 70%); }
.rail { gap: clamp(1rem, 2.2vw, 1.75rem); padding-inline: var(--sc-gutter); align-items: stretch; }
.rail__lead { flex: 0 0 auto; width: min(80vw, 24rem); display: flex; flex-direction: column; justify-content: center; gap: var(--sc-4); }
.rail__lead h2 { margin: 0; font-family: var(--sc-font-display); font-weight: 500; font-size: var(--sc-t-3xl); line-height: 1; letter-spacing: -0.03em; }
.rail__lead p { margin: 0; color: var(--sc-ink-soft); max-width: 30ch; }
.offer {
  flex: 0 0 auto; width: clamp(16rem, 26vw, 22rem); min-height: min(56vh, 26rem);
  display: flex; flex-direction: column; justify-content: space-between; gap: var(--sc-6);
  padding: var(--sc-6); border-radius: 1.25rem; position: relative; overflow: hidden;
}
.offer::before { content: ""; position: absolute; inset: 0; pointer-events: none; background: linear-gradient(160deg, rgb(255 255 255 / .07), transparent 40%); }
@media (prefers-reduced-motion: no-preference) { .offer { opacity: clamp(0.55, calc(var(--sc-p, 0) * 4.5 - var(--i) * 0.75 + 1), 1); } }
.offer h3 { margin: 0; font-family: var(--sc-font-display); font-weight: 500; font-size: var(--sc-t-2xl); line-height: 1; letter-spacing: -0.025em; }
.offer p { margin: 0; color: color-mix(in oklab, var(--sc-ink) 74%, var(--sc-canvas)); font-size: var(--sc-t-sm); }
.offer__k { font-family: var(--sc-font-mono); font-size: 0.68rem; letter-spacing: 0.12em; text-transform: uppercase; color: var(--sc-ink-soft); }
.rail__end { flex: 0 0 auto; width: min(76vw, 19rem); display: flex; flex-direction: column; justify-content: center; gap: var(--sc-4); }
.rail__end p { margin: 0; font-family: var(--sc-font-display); font-size: var(--sc-t-2xl); line-height: 1.05; letter-spacing: -0.02em; }
.offer.step { justify-content: flex-start; }
.step .sc-stack { margin-top: auto; }
.step .offer__k { display: flex; flex-direction: column; gap: 0.35rem; }
.step .offer__k em { font-style: normal; color: var(--k-teal); letter-spacing: 0.08em; }
.rules { list-style: none; margin: 0; padding: 0; display: grid; gap: var(--sc-3); font-size: var(--sc-t-sm); color: color-mix(in oklab, var(--sc-ink) 78%, var(--sc-canvas)); }
.rules li { padding-left: 1.2rem; position: relative; } .rules li::before { content: "✓"; position: absolute; left: 0; color: var(--k-teal); }
.rail__end { width: min(80vw, 22rem); }
.rail__end .btn { align-self: start; }
.inline-link { color: var(--sc-ink); text-decoration: none; background: linear-gradient(var(--sc-accent), var(--sc-accent)) 0 100% / 100% 1px no-repeat; align-self: start; transition: opacity var(--sc-d-fast) var(--sc-ease-out); }
.inline-link:hover { opacity: 0.8; }
.inline-link:active { opacity: 0.6; }

/* -------------------------------------------------------- 5 · future -- */
.future__copy { position: absolute; inset: 0; display: grid; place-items: center; text-align: center; z-index: var(--sc-z-copy); padding-inline: var(--sc-gutter); }
.future__copy > * { grid-area: 1 / 1; }
.beat { margin: 0; font-family: var(--sc-font-display); font-weight: 500; font-size: clamp(2.6rem, 1.2rem + 5.4vw, 6.8rem); line-height: 0.98; letter-spacing: -0.035em; max-width: 16ch; text-wrap: balance; text-shadow: 0 2px 30px rgb(0 0 0 / .65); }
.future .label { position: absolute; top: clamp(6rem, 16vh, 9rem); left: 50%; translate: -50% 0; z-index: var(--sc-z-copy); }
/* ------------------------------------------------------- 6 · journal -- */
.journal { display: grid; gap: var(--sc-8); grid-template-columns: minmax(0, 1fr); }
@media (min-width: 960px) { .journal { grid-template-columns: minmax(0, 0.8fr) minmax(0, 1.2fr); } }
.journal h2 { margin: 0; font-family: var(--sc-font-display); font-weight: 500; font-size: var(--sc-t-2xl); line-height: 1.05; letter-spacing: -0.02em; max-width: 16ch; }
.journal .sc-body { margin: 0; }
.posts { list-style: none; margin: 0; padding: 0; display: grid; }
.post { display: grid; grid-template-columns: minmax(0, 1fr) auto; gap: var(--sc-5); align-items: baseline; padding-block: var(--sc-5); border-top: 1px solid var(--sc-hairline); }
.posts li:last-child .post { border-bottom: 1px solid var(--sc-hairline); }
.post h3 { margin: 0; font-family: var(--sc-font-display); font-weight: 350; font-size: var(--sc-t-xl); letter-spacing: -0.02em; line-height: 1.15; }
.post p { margin: var(--sc-2) 0 0; color: var(--sc-ink-soft); font-size: var(--sc-t-sm); }
.post__state { font-family: var(--sc-font-mono); font-size: 0.68rem; letter-spacing: 0.1em; text-transform: uppercase; color: var(--sc-ink-soft); padding: 0.3rem 0.6rem; border-radius: var(--sc-r-pill); box-shadow: inset 0 0 0 1px var(--sc-hairline-strong); white-space: nowrap; }

/* ------------------------------------------------------- 7 · contact -- */
.close { display: grid; grid-template-rows: 1fr auto;
  background:
    radial-gradient(50rem 32rem at 50% 45%, color-mix(in oklab, var(--sc-accent) 9%, transparent), transparent 70%),
    radial-gradient(40rem 30rem at 100% 100%, color-mix(in oklab, var(--sc-surface) 90%, transparent), transparent 70%); }
.close__inner { align-self: center; justify-self: center; text-align: center; display: grid; justify-items: center; gap: var(--sc-5); padding-inline: var(--sc-gutter); position: relative; z-index: 3; }
.close h2 { margin: 0; font-family: var(--sc-font-display); font-weight: 500; font-size: var(--sc-t-4xl); line-height: 0.96; letter-spacing: -0.035em; max-width: 14ch; text-wrap: balance; }
.close__sub { margin: 0; color: var(--sc-ink-soft); max-width: 44ch; }
.close__langs { margin: 0; font-family: var(--sc-font-mono); font-size: var(--sc-t-xs); letter-spacing: 0.08em; color: var(--sc-ink-soft); }
.cta { padding: 1rem 1.7rem; font-size: var(--sc-t-base); }
.foot { position: relative; z-index: 3; display: flex; flex-wrap: wrap; justify-content: space-between; gap: var(--sc-3);
  padding: var(--sc-5) var(--sc-gutter) calc(var(--sc-5) + env(safe-area-inset-bottom, 0px));
  border-top: 1px solid var(--sc-hairline); font-size: var(--sc-t-xs); color: var(--sc-ink-soft); }
.foot a { color: var(--sc-ink-soft); }
.foot a:hover { color: var(--sc-ink); }
.foot a:active { opacity: 0.7; }

/* --------------------------------------------------- the AI layer -- */
/* One card per chapter, shown while that chapter is in its "after" state. It is
   real text over the film: what the software did, step by step. Teal = done by
   the system, amber = waiting for a person. */
:root { --k-teal: #5fd4c4; --k-amber: #f0b45a; }
.ai {
  position: fixed; z-index: var(--sc-z-copy); right: var(--sc-gutter); top: clamp(6.5rem, 18vh, 11rem);
  width: min(22rem, 30vw); padding: var(--sc-4) var(--sc-5); border-radius: 1rem;
  opacity: 0; translate: 0 0.6rem; pointer-events: none;
  transition: opacity 500ms var(--sc-ease-out), translate 500ms var(--sc-ease-out);
}
.chapter.is-live.is-after .ai, .chapter--single.is-live .ai { opacity: 1; translate: 0 0; }
.ai__k { margin: 0 0 var(--sc-3); font-family: var(--sc-font-mono); font-size: 0.64rem; letter-spacing: 0.14em; text-transform: uppercase; color: var(--k-teal); display: flex; align-items: center; gap: var(--sc-2); }
.ai__k::before { content: ""; width: 0.45rem; height: 0.45rem; border-radius: 50%; background: var(--k-teal); box-shadow: 0 0 0 0 color-mix(in oklab, var(--k-teal) 60%, transparent); animation: k-pulse 2.2s var(--sc-ease-out) infinite; }
@keyframes k-pulse { 0% { box-shadow: 0 0 0 0 color-mix(in oklab, var(--k-teal) 55%, transparent); } 70%, 100% { box-shadow: 0 0 0 0.5rem transparent; } }
.ai ol { list-style: none; margin: 0; padding: 0; display: grid; gap: var(--sc-2); }
.ai li { display: grid; grid-template-columns: 0.9rem minmax(0, 1fr) auto; align-items: baseline; gap: var(--sc-2); font-size: var(--sc-t-sm); line-height: 1.35;
  opacity: 0; translate: 0.4rem 0; transition: opacity 380ms var(--sc-ease-out), translate 380ms var(--sc-ease-out); }
.ai li::before { content: "✓"; font-size: 0.75rem; color: var(--k-teal); }
.ai li.flag::before { content: "!"; font-weight: 600; color: var(--k-amber); }
.ai li b { font-weight: 450; }
.ai li span { font-family: var(--sc-font-mono); font-size: 0.68rem; letter-spacing: 0.04em; color: var(--sc-ink-soft); white-space: nowrap; }
.ai li.flag span { color: var(--k-amber); }
.chapter.is-live.is-after .ai li, .chapter--single.is-live .ai li { opacity: 1; translate: 0 0; }
.ai li:nth-child(2) { transition-delay: 260ms; } .ai li:nth-child(3) { transition-delay: 520ms; } .ai li:nth-child(4) { transition-delay: 780ms; }
@media (max-width: 960px) {
  .ai { right: var(--sc-gutter); left: var(--sc-gutter); width: auto; top: auto; bottom: calc(clamp(1.5rem, 6vh, 3.5rem) + 4.2rem + env(safe-area-inset-bottom, 0px)); padding: var(--sc-3) var(--sc-4); }
  .ai li:nth-child(n+4) { display: none; }
}
@media (prefers-reduced-motion: reduce) { .ai, .ai li { transition: opacity 200ms linear; translate: none !important; } .ai__k::before { animation: none; } }


/* ------------------------------------------------ screen demos -- */
/* A small, sharp "screen" per chapter that shows in real text what the
   automation does. Before: empty fields and a manual timer. After: the
   fields fill in one by one. Teal = done by the system, amber = needs a person. */
.demo {
  position: fixed; z-index: var(--sc-z-copy); right: var(--sc-gutter); top: clamp(6.5rem, 18vh, 11rem);
  width: min(25rem, 32vw); border-radius: 1rem; overflow: hidden; font-size: var(--sc-t-sm);
  background: color-mix(in oklab, var(--sc-surface) 58%, transparent);
  opacity: 0; translate: 0 0.8rem; pointer-events: none;
  transition: opacity 500ms var(--sc-ease-out), translate 500ms var(--sc-ease-out);
}
.chapter.is-live .demo { opacity: 1; translate: 0 0; }
.demo__bar { display: flex; align-items: center; gap: 0.35rem; padding: 0.6rem 0.9rem; border-bottom: 1px solid var(--sc-hairline); }
.demo__bar i { width: 0.5rem; height: 0.5rem; border-radius: 50%; background: color-mix(in oklab, var(--sc-ink) 22%, transparent); }
.demo__bar b { margin-left: 0.5rem; font-family: var(--sc-font-mono); font-weight: 400; font-size: 0.68rem; letter-spacing: 0.1em; text-transform: uppercase; color: var(--sc-ink-soft); }
.mail { margin: 0.9rem 0.9rem 0; padding: 0.7rem 0.8rem; border-radius: 0.6rem; background: color-mix(in oklab, var(--sc-canvas) 55%, transparent); color: color-mix(in oklab, var(--sc-ink) 82%, transparent); line-height: 1.45; }
.mail p { margin: 0; } .mail__from { font-family: var(--sc-font-mono); font-size: 0.66rem; color: var(--sc-ink-soft); margin-bottom: 0.3rem !important; }
.form { margin: 0; padding: 0.8rem 0.9rem 0.2rem; display: grid; gap: 0.4rem; }
.form > div { display: grid; grid-template-columns: 6.6rem minmax(0, 1fr); align-items: center; gap: 0.6rem; }
.form dt { color: var(--sc-ink-soft); font-size: 0.78rem; }
.form dd { margin: 0; min-height: 1.75rem; padding: 0.25rem 0.55rem; border-radius: 0.4rem; box-shadow: inset 0 0 0 1px var(--sc-hairline-strong); color: transparent; position: relative;
  transition: color 300ms var(--sc-ease-out), background 600ms var(--sc-ease-out), box-shadow 600ms var(--sc-ease-out); }
.form > div:first-child dd::after { content: ""; position: absolute; left: 0.55rem; top: 0.4rem; bottom: 0.4rem; width: 1px; background: var(--sc-ink); animation: k-caret 1s steps(1) infinite; }
@keyframes k-caret { 50% { opacity: 0; } }
.is-after .form dd { color: var(--sc-ink); background: color-mix(in oklab, var(--k-teal) 12%, transparent); box-shadow: inset 0 0 0 1px color-mix(in oklab, var(--k-teal) 45%, transparent); }
.is-after .form > div:first-child dd::after { display: none; }
.is-after .form .flag dd { color: var(--k-amber); background: color-mix(in oklab, var(--k-amber) 12%, transparent); box-shadow: inset 0 0 0 1px color-mix(in oklab, var(--k-amber) 50%, transparent); }
.form > div:nth-child(2) dd, .rows li:nth-child(2) em { transition-delay: 180ms; }
.form > div:nth-child(3) dd, .rows li:nth-child(3) em { transition-delay: 360ms; }
.form > div:nth-child(4) dd, .rows li:nth-child(4) em { transition-delay: 540ms; }
.form > div:nth-child(5) dd { transition-delay: 720ms; }
.demo__foot { margin: 0; padding: 0.7rem 0.9rem 0.8rem; display: grid; font-family: var(--sc-font-mono); font-size: 0.7rem; letter-spacing: 0.04em; }
.demo__foot span { grid-area: 1 / 1; transition: opacity 400ms var(--sc-ease-out); }
.demo__foot .b4 { color: var(--k-warm); } .demo__foot .af { color: var(--k-teal); opacity: 0; }
.is-after .demo__foot .b4 { opacity: 0; } .is-after .demo__foot .af { opacity: 1; }
.rows { list-style: none; margin: 0; padding: 0.5rem 0.9rem 0; display: grid; }
.rows li { display: grid; grid-template-columns: 4.8rem 4.6rem minmax(0, 1fr); gap: 0.5rem; align-items: baseline; padding: 0.55rem 0; border-bottom: 1px solid var(--sc-hairline); }
.rows span { font-family: var(--sc-font-mono); font-size: 0.72rem; } .rows span:nth-child(2) { text-align: right; }
.rows em { font-style: normal; font-size: 0.76rem; color: var(--sc-ink-soft); transition: color 300ms var(--sc-ease-out); }
.rows em::before { content: "waiting"; }
.rows em { font-size: 0; } .rows em::before { font-size: 0.76rem; }
.is-after .rows em { font-size: 0.76rem; color: var(--k-teal); } .is-after .rows em::before { content: "✓ "; }
.is-after .rows .flag em { color: var(--k-amber); } .is-after .rows .flag em::before { content: "! "; }
.flow { display: flex; gap: 0.5rem; padding: 0.9rem 0.9rem 0; }
.flow span { flex: 1; text-align: center; padding: 0.4rem; border-radius: 0.5rem; font-family: var(--sc-font-mono); font-size: 0.7rem; box-shadow: inset 0 0 0 1px var(--sc-hairline-strong); position: relative; }
.flow span::after { content: ""; position: absolute; left: 50%; top: 100%; width: 1px; height: 0.9rem; background: linear-gradient(var(--k-teal), transparent); }
.report { margin: 0.9rem; padding: 0.8rem; border-radius: 0.6rem; background: color-mix(in oklab, var(--sc-canvas) 55%, transparent); display: grid; gap: 0.7rem; }
.bars { height: 5.5rem; display: flex; align-items: flex-end; gap: 0.4rem; }
.bars i { flex: 1; height: calc(var(--h) * 100%); border-radius: 0.25rem 0.25rem 0 0; background: color-mix(in oklab, var(--k-teal) 55%, transparent); transform-origin: bottom; transform: scaleY(0.05); transition: transform 700ms var(--sc-ease-out); }
.bars i.hi { background: var(--k-amber); }
.chapter.is-live .bars i { transform: scaleY(1); }
.bars i:nth-child(2) { transition-delay: 90ms; } .bars i:nth-child(3) { transition-delay: 180ms; } .bars i:nth-child(4) { transition-delay: 270ms; } .bars i:nth-child(5) { transition-delay: 360ms; } .bars i:nth-child(6) { transition-delay: 450ms; } .bars i:nth-child(7) { transition-delay: 540ms; }
.report p { margin: 0; display: flex; justify-content: space-between; gap: 0.6rem; font-size: 0.78rem; } .report p span { color: var(--k-amber); }
.ex { list-style: none; margin: 0; padding: 0.3rem 0.9rem 0.6rem; display: grid; }
.ex li { display: grid; gap: 0.15rem; padding: 0.6rem 0; border-bottom: 1px solid var(--sc-hairline); }
.ex li:last-child { border-bottom: 0; }
.ex b { font-weight: 500; font-size: 0.82rem; } .ex span { color: var(--sc-ink-soft); font-size: 0.78rem; }
@media (max-width: 960px) {
  .demo { left: var(--sc-gutter); width: auto; top: auto; bottom: calc(clamp(1.5rem, 6vh, 3.5rem) + 4.2rem + env(safe-area-inset-bottom, 0px)); }
  .demo__bar { display: none; }
  .mail { margin: 0.7rem 0.7rem 0; padding: 0.55rem 0.7rem; font-size: 0.8rem; }
  .form { padding-top: 0.6rem; gap: 0.3rem; } .form dd { min-height: 1.5rem; padding: 0.15rem 0.5rem; }
  .form > div:nth-child(n+4) { display: none; } .form > div.flag { display: grid; }
  .rows li:nth-child(4) { display: none; }
  .ex li:nth-child(n+4) { display: none; }
  .bars { height: 3.2rem; }
  .chapter__copy p.lede { font-size: 0.95rem; }
}
@media (prefers-reduced-motion: reduce) { .demo, .form dd, .bars i { transition: opacity 200ms linear; translate: none !important; } .bars i { transform: none; } .form dd::after { animation: none; } }

/* ----------------------------------------------- cursor light -- */
/* A soft light that follows the pointer across the whole film, like a torch
   on the scene. Pointer devices only; off for reduced motion. */
.glow { position: absolute; z-index: 3; left: 0; top: 0; width: 46rem; height: 46rem; margin: -23rem 0 0 -23rem; border-radius: 50%;
  background: radial-gradient(closest-side, rgb(236 242 248 / .26), rgb(195 204 214 / .1) 40%, transparent 72%); opacity: 0; transition: opacity 500ms var(--sc-ease-out); will-change: transform; }
.glow.on { opacity: 1; }
.cursor-dot { position: fixed; z-index: calc(var(--sc-z-chrome) + 5); left: 0; top: 0; width: 2.2rem; height: 2.2rem; margin: -1.1rem 0 0 -1.1rem; border-radius: 50%; pointer-events: none;
  background: radial-gradient(closest-side, color-mix(in oklab, var(--k-ti-hi) 30%, transparent), transparent);
  box-shadow: inset 0 0 0 1px color-mix(in oklab, var(--k-ti-hi) 35%, transparent);
  opacity: 0; transition: opacity 300ms var(--sc-ease-out), width 300ms var(--sc-ease-out), height 300ms var(--sc-ease-out), margin 300ms var(--sc-ease-out); will-change: transform; }
.cursor-dot.on { opacity: 1; }
.cursor-dot.hot { width: 3.4rem; height: 3.4rem; margin: -1.7rem 0 0 -1.7rem; }
@media (hover: none), (pointer: coarse), (prefers-reduced-motion: reduce) { .glow, .cursor-dot { display: none; } }

  @media (max-width: 560px) { .calc__box--d { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: var(--sc-3); } .calc__box--d label { font-size: 0.78rem; } .calc__box--d input[type="number"] { padding: 0.55rem 0.7rem; } .tabs { margin: var(--sc-4) var(--sc-4) 0; } .calc__out--d { grid-template-columns: repeat(2, minmax(0, 1fr)); } .calc__out--d > div:first-child .calc__v { font-size: var(--sc-t-2xl); } }
.pricing { display: grid; gap: var(--sc-8); grid-template-columns: minmax(0, 1fr); }
.pricing .statement { max-width: 22ch; } .pricing .sc-body { max-width: 62ch; }
.factors { list-style: none; margin: var(--sc-5) 0 0; padding: 0; display: flex; flex-wrap: wrap; gap: var(--sc-2); }
.factors li { font-family: var(--sc-font-mono); font-size: 0.7rem; letter-spacing: 0.04em; padding: 0.35rem 0.7rem; border-radius: var(--sc-r-pill); color: var(--sc-ink-soft); box-shadow: inset 0 0 0 1px var(--sc-hairline-strong); }
.price-grid { display: grid; gap: var(--sc-4); grid-template-columns: repeat(auto-fit, minmax(15rem, 1fr)); }
.price { padding: var(--sc-5); border-radius: 1.1rem; display: grid; gap: var(--sc-3); align-content: start; }
.price__k { margin: 0; font-family: var(--sc-font-display); font-size: var(--sc-t-xl); letter-spacing: -0.02em; }
.price ul { list-style: none; margin: 0; padding: 0; display: grid; }
.price li { display: grid; gap: 0.15rem; padding: 0.6rem 0; border-top: 1px solid var(--sc-hairline); }
.price li span { font-size: var(--sc-t-sm); color: var(--sc-ink-soft); }
.price li b { font-weight: 500; font-variant-numeric: tabular-nums; }
.price__note { margin: 0; font-size: var(--sc-t-xs); color: var(--sc-ink-soft); }
.price__fine { grid-column: 1 / -1; margin: 0; font-size: var(--sc-t-xs); color: var(--sc-ink-soft); }
/* -------------------------------------------------------- chat -- */
.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; border: 0; }
button.btn { border: 0; cursor: pointer; font: inherit; font-size: var(--sc-t-sm); font-weight: 500; }
.chat-fab { position: fixed; z-index: calc(var(--sc-z-chrome) - 1); right: var(--sc-gutter); bottom: calc(clamp(1.5rem, 6vh, 3.5rem) + env(safe-area-inset-bottom, 0px));
  display: inline-flex; align-items: center; gap: var(--sc-3); padding: 0.8rem 1.2rem; border: 0; border-radius: var(--sc-r-pill); color: var(--sc-ink); font: inherit; font-size: var(--sc-t-sm); font-weight: 500; cursor: pointer;
  transition: transform var(--k-spring), opacity 300ms var(--sc-ease-out); transition-timing-function: var(--k-ease-spring); }
.chat-fab:hover { transform: translateY(-2px); }
.chat-fab:active { transform: scale(0.97); }
.chat-fab__dot { width: 0.55rem; height: 0.55rem; border-radius: 50%; background: var(--k-teal); animation: k-pulse 2.2s var(--sc-ease-out) infinite; }
.chat-open .chat-fab { opacity: 0; pointer-events: none; }
/* the HUD makes room for the chat button */
.hud { right: calc(var(--sc-gutter) + 11.5rem); }
@media (max-width: 960px) {
  .hud { right: var(--sc-gutter); bottom: calc(clamp(1.5rem, 6vh, 3.5rem) + 3.8rem + env(safe-area-inset-bottom, 0px)); }
  .chat-fab { left: auto; padding: 0.7rem 1rem; }
}
/* phones: the chat button shrinks to a round icon so it covers less of the page */
.chat-fab__icon { display: none; }
@media (max-width: 560px) {
  .chat-fab { width: 3.4rem; height: 3.4rem; padding: 0; justify-content: center; }
  .chat-fab__label { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }
  .chat-fab__icon { display: block; width: 1.35rem; height: 1.35rem; }
  .chat-fab__dot { position: absolute; top: 0.55rem; right: 0.6rem; }
}
.chat { position: fixed; z-index: calc(var(--sc-z-chrome) + 6); right: var(--sc-gutter); bottom: calc(1.25rem + env(safe-area-inset-bottom, 0px));
  width: min(27rem, calc(100vw - 2 * var(--sc-gutter))); height: min(44rem, calc(100svh - 2.5rem)); display: grid; grid-template-rows: auto minmax(0, 1fr) auto auto;
  border-radius: 1.25rem; overflow: hidden; background: var(--sc-surface); cursor: auto; isolation: isolate;
  box-shadow: 0 2rem 4rem -1rem rgb(0 0 0 / 0.6), inset 0 0 0 1px var(--sc-hairline-strong);
  opacity: 0; translate: 0 1rem; scale: 0.98; transform-origin: 100% 100%; transition: opacity 280ms var(--sc-ease-out), translate 280ms var(--sc-ease-out), scale 280ms var(--sc-ease-out); }
.chat[hidden] { display: none; }
.chat.on { opacity: 1; translate: 0 0; scale: 1; }
/* phones: the chat becomes a full-screen sheet and the page behind it stops scrolling */
@media (max-width: 560px) {
  .chat { inset: 0; width: 100%; height: 100%; height: 100dvh; border-radius: 0; padding-bottom: env(safe-area-inset-bottom, 0px); transform-origin: 50% 100%; }
  .chat-open, .chat-open body { overflow: hidden; }
}
.chat-open .cursor-dot, .chat-open .glow { opacity: 0 !important; }
.chat__head { display: flex; align-items: center; gap: var(--sc-3); padding: var(--sc-4) var(--sc-4) var(--sc-4) var(--sc-5); border-bottom: 1px solid var(--sc-hairline); }
.chat__head > div { flex: 1; min-width: 0; }
.chat__title { margin: 0; font-weight: 500; font-size: var(--sc-t-sm); }
.chat__sub { margin: 0; display: flex; align-items: center; gap: 0.4rem; font-size: 0.72rem; color: var(--sc-ink-soft); }
.chat__sub::before { content: ""; width: 0.45rem; height: 0.45rem; border-radius: 50%; background: var(--k-teal); }
.chat__x { flex: none; width: 2.5rem; height: 2.5rem; border: 0; border-radius: 50%; background: none; color: var(--sc-ink-soft); font-size: 1.5rem; line-height: 1; cursor: pointer; }
.chat__x:hover, .chat__x:focus-visible { color: var(--sc-ink); background: color-mix(in oklab, var(--sc-ink) 8%, transparent); }
.chat__log { list-style: none; margin: 0; padding: var(--sc-5) var(--sc-5) var(--sc-4); display: flex; flex-direction: column; gap: var(--sc-3); overflow-y: auto; overscroll-behavior: contain; position: relative; }
.chat__log > :first-child { margin-top: auto; }
.msg { max-width: 88%; padding: 0.7rem 0.95rem; border-radius: 1.1rem; font-size: var(--sc-t-sm); line-height: 1.5; animation: k-in 320ms var(--sc-ease-out); overflow-wrap: anywhere; }
@keyframes k-in { from { opacity: 0; translate: 0 0.4rem; } }
.msg--bot { align-self: flex-start; background: color-mix(in oklab, var(--sc-ink) 8%, transparent); border-bottom-left-radius: 0.3rem; }
.msg--me { align-self: flex-end; background: linear-gradient(160deg, var(--k-ti-hi), var(--k-ti-lo)); color: var(--sc-accent-ink); border-bottom-right-radius: 0.3rem; }
.msg p { margin: 0; } .msg p + p, .msg ul { margin-top: 0.5rem; } .msg ul { padding-left: 1.1rem; margin-bottom: 0; }
.msg a { color: inherit; }
.msg--typing { display: inline-flex; gap: 0.3rem; padding: 0.85rem 1rem; }
.msg--typing i { width: 0.4rem; height: 0.4rem; border-radius: 50%; background: var(--sc-ink-soft); animation: k-dot 1s infinite ease-in-out; }
.msg--typing i:nth-child(2) { animation-delay: 0.15s; } .msg--typing i:nth-child(3) { animation-delay: 0.3s; }
@keyframes k-dot { 0%, 80%, 100% { opacity: 0.3; translate: 0 0; } 40% { opacity: 1; translate: 0 -0.2rem; } }
/* suggested replies live inside the conversation, under the last answer, so they never cover it */
.chat__quick { display: flex; flex-wrap: wrap; justify-content: flex-end; gap: var(--sc-2); padding-top: var(--sc-1); animation: k-in 320ms var(--sc-ease-out); }
.chat__quick button { padding: 0.5rem 0.85rem; border: 0; border-radius: var(--sc-r-pill); background: color-mix(in oklab, var(--sc-ink) 4%, transparent); box-shadow: inset 0 0 0 1px var(--sc-hairline-strong); color: var(--sc-ink); font: inherit; font-size: 0.8rem; line-height: 1.2; cursor: pointer; transition: background 200ms; }
.chat__quick button:hover, .chat__quick button:focus-visible { background: color-mix(in oklab, var(--sc-ink) 12%, transparent); }
.chat__form { display: flex; align-items: center; gap: var(--sc-2); padding: var(--sc-3) var(--sc-4); border-top: 1px solid var(--sc-hairline); }
.chat__form input { flex: 1; min-width: 0; padding: 0.75rem 1rem; border: 0; border-radius: var(--sc-r-pill); background: color-mix(in oklab, var(--sc-canvas) 60%, transparent); box-shadow: inset 0 0 0 1px var(--sc-hairline-strong); color: var(--sc-ink); font: inherit; font-size: 16px; }
.chat__form input:focus-visible { outline: none; box-shadow: inset 0 0 0 1.5px var(--k-ti-hi); }
.chat__send { flex: none; width: 2.75rem; height: 2.75rem; border: 0; border-radius: 50%; background: linear-gradient(160deg, var(--k-ti-hi), var(--k-ti-lo)); color: var(--sc-accent-ink); font-size: 1.1rem; cursor: pointer; }
.chat__foot { margin: 0; padding: 0 var(--sc-5) var(--sc-3); font-size: 0.68rem; color: var(--sc-ink-soft); text-align: center; }
/* the hand-off is a card in the conversation with visible labels */
.msg--card { align-self: stretch; max-width: none; padding: var(--sc-4); background: color-mix(in oklab, var(--sc-ink) 5%, transparent); box-shadow: inset 0 0 0 1px var(--sc-hairline); border-radius: 1rem; }
.handoff { display: grid; gap: var(--sc-3); }
.handoff__title { margin: 0; font-weight: 500; }
.handoff label { display: grid; gap: 0.3rem; font-size: 0.75rem; color: var(--sc-ink-soft); }
.handoff input, .handoff textarea { width: 100%; padding: 0.6rem 0.8rem; border: 0; border-radius: var(--sc-r-md); background: color-mix(in oklab, var(--sc-canvas) 55%, transparent); box-shadow: inset 0 0 0 1px var(--sc-hairline-strong); color: var(--sc-ink); font: inherit; font-size: 16px; }
.handoff textarea { min-height: 6rem; resize: vertical; }
.handoff input:focus-visible, .handoff textarea:focus-visible { outline: none; box-shadow: inset 0 0 0 1.5px var(--k-ti-hi); }
.handoff__row { display: flex; gap: var(--sc-2); align-items: center; }
.handoff__send { padding: 0.65rem 1.1rem; border: 0; border-radius: var(--sc-r-pill); background: linear-gradient(160deg, var(--k-ti-hi), var(--k-ti-lo)); color: var(--sc-accent-ink); font: inherit; font-size: var(--sc-t-sm); font-weight: 500; cursor: pointer; }
.handoff__skip { padding: 0.65rem 0.8rem; border: 0; background: none; color: var(--sc-ink-soft); font: inherit; font-size: 0.8rem; cursor: pointer; text-decoration: underline; text-underline-offset: 0.2em; }

/* ================================================================ v9 · pages -- */
body { background: var(--sc-canvas); }
.skip { position: fixed; left: var(--sc-gutter); top: -4rem; z-index: calc(var(--sc-z-chrome) + 10); padding: 0.6rem 1rem; border-radius: var(--sc-r-pill); background: var(--sc-ink); color: var(--sc-canvas); text-decoration: none; }
.skip:focus { top: 1rem; }

/* header: page links, current page, mobile menu */
.bar__end { display: flex; align-items: center; gap: var(--sc-3); }
.nav a[aria-current="page"] { color: var(--sc-ink); }
.nav a[aria-current="page"]::after { transform: scaleX(1); }
.nav__book { display: none; }
.menu-btn { display: none; width: 2.75rem; height: 2.75rem; border: 0; border-radius: 50%; background: color-mix(in oklab, var(--sc-surface) 60%, transparent); box-shadow: inset 0 0 0 1px var(--sc-hairline-strong); cursor: pointer; position: relative; }
.menu-btn span { position: absolute; left: 50%; width: 1.1rem; height: 1.5px; margin-left: -0.55rem; background: var(--sc-ink); border-radius: 2px; transition: transform 260ms var(--sc-ease-out), top 260ms var(--sc-ease-out); }
.menu-btn span:first-child { top: calc(50% - 4px); } .menu-btn span:last-child { top: calc(50% + 3px); }
.menu-open .menu-btn span:first-child { top: calc(50% - 0.5px); transform: rotate(45deg); }
.menu-open .menu-btn span:last-child { top: calc(50% - 0.5px); transform: rotate(-45deg); }
@media (max-width: 959px) {
  .menu-btn { display: inline-block; }
  .nav { position: fixed; inset: 0; z-index: -1; display: flex; flex-direction: column; justify-content: center; gap: var(--sc-2); padding: 6rem var(--sc-gutter) 3rem;
    background: var(--sc-canvas); opacity: 0; visibility: hidden; transition: opacity 260ms var(--sc-ease-out), visibility 0s 260ms; }
  .menu-open .nav { opacity: 1; visibility: visible; transition: opacity 260ms var(--sc-ease-out); }
  .menu-open, .menu-open body { overflow: hidden; }
  .nav a { font-family: var(--sc-font-display); font-weight: 330; font-size: clamp(2rem, 8vw, 3rem); letter-spacing: -0.02em; color: var(--sc-ink); padding-block: 0.15em; }
  .nav a::after { display: none; }
  .nav a[aria-current="page"] { color: var(--sc-ink-soft); }
  .nav__book { display: inline; }
}
@media (max-width: 440px) { .bar__cta { padding: 0.6rem 0.95rem; } .bar__cta .arr { display: none; } }

/* sub-page background: one looping clip, darker as you read */
.film--still video { opacity: 1; }
.film--still .film__dim { transition: none; }

/* page hero */
.page-hero { position: relative; min-height: min(78vh, 52rem); display: flex; align-items: flex-end; padding: 8rem var(--sc-gutter) clamp(3rem, 9vh, 6rem); }
.page-hero__in { display: grid; gap: var(--sc-4); max-width: 46rem; text-shadow: 0 1px 2px rgb(0 0 0 / .45), 0 2px 18px rgb(0 0 0 / .4); }
.page-hero h1 { font-family: var(--sc-font-display); font-weight: 330; font-size: clamp(2.7rem, 1.3rem + 4.4vw, 5.4rem); line-height: 0.98; letter-spacing: -0.03em; margin: 0; text-wrap: balance; }
.page-hero .lede { margin: 0; font-size: var(--sc-t-lg); line-height: 1.55; color: color-mix(in oklab, var(--sc-ink) 86%, var(--sc-canvas)); max-width: 40ch; }
@media (max-width: 560px) { .page-hero { min-height: 70svh; padding-top: 7rem; } .page-hero .lede { font-size: var(--sc-t-base); } }

/* home: explore tiles */
.explore .sc-wrap { display: grid; gap: var(--sc-7); }
.tiles { list-style: none; margin: 0; padding: 0; display: grid; gap: var(--sc-4); grid-template-columns: minmax(0, 1fr); }
@media (min-width: 600px) { .tiles { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
@media (min-width: 960px) { .tiles { grid-template-columns: repeat(3, minmax(0, 1fr)); } }
.tile { position: relative; display: grid; align-content: end; gap: var(--sc-2); min-height: clamp(10.5rem, 24vw, 17rem); padding: var(--sc-5); border-radius: 1.25rem; overflow: hidden; text-decoration: none; color: var(--sc-ink); box-shadow: var(--k-elev); isolation: isolate; }
.tile img { position: absolute; inset: 0; z-index: -2; width: 100%; height: 100%; object-fit: cover; transition: transform 700ms var(--sc-ease-out); }
.tile::before { content: ""; position: absolute; inset: 0; z-index: -1; background: linear-gradient(180deg, rgb(8 9 11 / .1) 20%, rgb(8 9 11 / .88) 78%); }
.tile:hover img, .tile:focus-visible img { transform: scale(1.05); }
.tile__k { font-family: var(--sc-font-display); font-size: var(--sc-t-xl); font-weight: 330; letter-spacing: -0.02em; line-height: 1.05; display: flex; align-items: baseline; justify-content: space-between; gap: var(--sc-3); }
.tile__k::after { content: "→"; font-family: var(--sc-font-text); font-size: 1rem; color: var(--sc-ink-soft); transition: transform 300ms var(--sc-ease-out); }
.tile:hover .tile__k::after { transform: translateX(4px); color: var(--sc-ink); }
.tile__t { color: color-mix(in oklab, var(--sc-ink) 78%, var(--sc-canvas)); font-size: var(--sc-t-sm); }
.tile--book { box-shadow: var(--k-elev), inset 0 0 0 1px color-mix(in oklab, var(--k-teal) 55%, transparent); }

/* closing call to action, used on every page */
.page-cta__in { display: grid; gap: var(--sc-4); justify-items: start; max-width: 46rem; }
.page-cta .sc-body { margin: 0; color: var(--sc-ink-soft); max-width: 48ch; }

/* how we work: the six steps as a grid instead of a long sideways scroll */
.steps-wrap { display: grid; gap: var(--sc-7); }
.steps { display: grid; gap: var(--sc-4); grid-template-columns: repeat(auto-fit, minmax(min(100%, 18rem), 1fr)); }
.steps .offer { width: auto; min-height: 15rem; opacity: 1; }
.rules-card { display: grid; gap: var(--sc-4); padding: var(--sc-6); border-radius: 1.25rem; align-content: start; }
.rules-card h3 { margin: 0; font-family: var(--sc-font-display); font-weight: 330; font-size: var(--sc-t-2xl); line-height: 1.05; letter-spacing: -0.02em; }
.rules-card .btn { justify-self: start; }

/* about: the proof, as a still block */
.proof-still { display: grid; gap: var(--sc-4); justify-items: start; padding: var(--sc-7) var(--sc-6); border-radius: 1.5rem; }
.proof-still .clock { justify-content: flex-start; }
.proof-still .clock__to { font-size: clamp(4rem, 2rem + 8vw, 8rem); }
.proof-still p { margin: 0; max-width: 56ch; color: color-mix(in oklab, var(--sc-ink) 80%, var(--sc-canvas)); }
.proof-still .fine { font-size: var(--sc-t-xs); color: var(--sc-ink-soft); font-family: var(--sc-font-mono); letter-spacing: 0.04em; }

/* book a call */
.book__grid { display: grid; gap: var(--sc-7); align-items: start; }
@media (min-width: 1000px) { .book__grid { grid-template-columns: minmax(0, 1.5fr) minmax(0, 1fr); } }
.book__form { display: grid; gap: var(--sc-6); padding: clamp(1.25rem, 3vw, 2.25rem); border-radius: 1.5rem; }
.book__form fieldset { border: 0; margin: 0; padding: 0; display: grid; gap: var(--sc-3); min-width: 0; }
.book__form legend { padding: 0; margin-bottom: var(--sc-3); font-family: var(--sc-font-mono); font-size: var(--sc-t-xs); letter-spacing: 0.12em; text-transform: uppercase; color: var(--sc-ink-soft); }
.opts { display: grid; gap: var(--sc-3); grid-template-columns: repeat(auto-fit, minmax(min(100%, 13rem), 1fr)); }
.opt { position: relative; display: grid; gap: 0.2rem; padding: var(--sc-4); border-radius: 1rem; cursor: pointer; box-shadow: inset 0 0 0 1px var(--sc-hairline-strong); background: color-mix(in oklab, var(--sc-canvas) 40%, transparent); transition: box-shadow 200ms, background 200ms; }
.opt input { position: absolute; opacity: 0; pointer-events: none; }
.opt b { font-weight: 500; }
.opt em { font-style: normal; font-family: var(--sc-font-mono); font-size: 0.72rem; letter-spacing: 0.06em; color: var(--k-teal); }
.opt small { color: var(--sc-ink-soft); font-size: 0.8rem; line-height: 1.45; }
.opt:hover { background: color-mix(in oklab, var(--sc-ink) 5%, transparent); }
.opt:has(input:checked) { box-shadow: inset 0 0 0 1.5px var(--k-ti-hi); background: color-mix(in oklab, var(--sc-ink) 7%, transparent); }
.opt:has(input:focus-visible) { outline: 2px solid var(--k-ti-hi); outline-offset: 2px; }
.tz { margin: 0; font-size: 0.8rem; color: var(--sc-ink-soft); }
.days, .times { display: flex; gap: var(--sc-2); overflow-x: auto; padding-bottom: 0.3rem; scrollbar-width: thin; }
.times { flex-wrap: wrap; overflow: visible; }
.day, .time { flex: none; border: 0; cursor: pointer; font: inherit; color: var(--sc-ink); background: color-mix(in oklab, var(--sc-canvas) 40%, transparent); box-shadow: inset 0 0 0 1px var(--sc-hairline-strong); transition: background 200ms, box-shadow 200ms; }
.day { display: grid; justify-items: center; gap: 0.1rem; min-width: 4.4rem; padding: 0.6rem 0.5rem; border-radius: 0.9rem; }
.day small { font-family: var(--sc-font-mono); font-size: 0.66rem; letter-spacing: 0.1em; text-transform: uppercase; color: var(--sc-ink-soft); }
.day b { font-weight: 500; font-size: 1.15rem; }
.day span { font-size: 0.72rem; color: var(--sc-ink-soft); }
.time { padding: 0.6rem 0.95rem; border-radius: var(--sc-r-pill); font-size: var(--sc-t-sm); }
.time small { color: var(--sc-ink-soft); font-size: 0.72rem; margin-left: 0.3rem; }
.day:hover, .time:hover { background: color-mix(in oklab, var(--sc-ink) 7%, transparent); }
.day[aria-pressed="true"], .time[aria-pressed="true"] { box-shadow: inset 0 0 0 1.5px var(--k-ti-hi); background: color-mix(in oklab, var(--sc-ink) 9%, transparent); }
.time[aria-pressed="true"]::before { content: "✓ "; color: var(--k-teal); }
.time:disabled { opacity: 0.4; cursor: not-allowed; }
.picked { list-style: none; margin: 0; padding: 0; display: flex; flex-wrap: wrap; gap: var(--sc-2); min-height: 2.2rem; }
.picked li { display: inline-flex; align-items: center; gap: 0.4rem; padding: 0.35rem 0.4rem 0.35rem 0.8rem; border-radius: var(--sc-r-pill); font-size: 0.8rem; background: color-mix(in oklab, var(--k-teal) 16%, transparent); box-shadow: inset 0 0 0 1px color-mix(in oklab, var(--k-teal) 45%, transparent); }
.picked button { width: 1.5rem; height: 1.5rem; border: 0; border-radius: 50%; background: none; color: var(--sc-ink); cursor: pointer; font-size: 1rem; line-height: 1; }
.picked .none { background: none; box-shadow: none; padding-left: 0; color: var(--sc-ink-soft); }
.fields { display: grid; gap: var(--sc-4); grid-template-columns: repeat(auto-fit, minmax(min(100%, 14rem), 1fr)); }
.field { display: grid; gap: 0.35rem; font-size: 0.8rem; color: var(--sc-ink-soft); }
.field--wide { grid-column: 1 / -1; }
.field input, .field textarea { width: 100%; padding: 0.75rem 0.9rem; border: 0; border-radius: var(--sc-r-md); background: color-mix(in oklab, var(--sc-canvas) 55%, transparent); box-shadow: inset 0 0 0 1px var(--sc-hairline-strong); color: var(--sc-ink); font: inherit; font-size: 16px; }
.field textarea { min-height: 7rem; resize: vertical; }
.field input:focus-visible, .field textarea:focus-visible { outline: none; box-shadow: inset 0 0 0 1.5px var(--k-ti-hi); }
.field[hidden] { display: none; }
.book__err { margin: 0; color: #f2b56b; font-size: var(--sc-t-sm); min-height: 1.2em; }
.book__submit { justify-self: start; border: 0; cursor: pointer; font: inherit; font-size: var(--sc-t-sm); font-weight: 500; }
.book__fine { margin: 0; font-size: 0.78rem; color: var(--sc-ink-soft); }
.book__fine a, .book__side a { color: inherit; }
.book__done { display: grid; gap: var(--sc-4); justify-items: start; }
.book__done h2 { margin: 0; font-family: var(--sc-font-display); font-weight: 330; font-size: var(--sc-t-2xl); letter-spacing: -0.02em; }
.book__done p { margin: 0; color: color-mix(in oklab, var(--sc-ink) 80%, var(--sc-canvas)); }
.book__embed { width: 100%; min-height: 46rem; border: 0; border-radius: 1.5rem; background: #fff; }
.book__side { display: grid; gap: var(--sc-5); }
.book__side h2 { margin: 0; font-family: var(--sc-font-display); font-weight: 330; font-size: var(--sc-t-2xl); letter-spacing: -0.02em; }
.book__side ol { margin: 0; padding: 0; list-style: none; counter-reset: s; display: grid; gap: var(--sc-4); }
.book__side li { counter-increment: s; display: grid; grid-template-columns: 2rem minmax(0, 1fr); gap: var(--sc-3); color: color-mix(in oklab, var(--sc-ink) 80%, var(--sc-canvas)); font-size: var(--sc-t-sm); }
.book__side li::before { content: counter(s); width: 2rem; height: 2rem; border-radius: 50%; display: grid; place-items: center; font-family: var(--sc-font-mono); font-size: 0.8rem; box-shadow: inset 0 0 0 1px var(--sc-hairline-strong); }
.book__side p { margin: 0; color: var(--sc-ink-soft); font-size: var(--sc-t-sm); }
.linkish { padding: 0; border: 0; background: none; color: var(--sc-ink); font: inherit; text-decoration: underline; text-underline-offset: 0.2em; cursor: pointer; }

/* privacy */
.legal { max-width: 46rem; display: grid; gap: var(--sc-5); }
.legal h2 { margin: var(--sc-5) 0 0; font-family: var(--sc-font-display); font-weight: 330; font-size: var(--sc-t-xl); letter-spacing: -0.02em; }
.legal p, .legal li { margin: 0; color: color-mix(in oklab, var(--sc-ink) 80%, var(--sc-canvas)); }
.legal ul { margin: 0; padding-left: 1.2rem; display: grid; gap: var(--sc-2); }
.legal a { color: var(--sc-ink); }
.legal table { width: 100%; border-collapse: collapse; font-size: var(--sc-t-sm); }
.legal th, .legal td { text-align: left; vertical-align: top; padding: 0.7rem 0.8rem 0.7rem 0; border-top: 1px solid var(--sc-hairline); color: color-mix(in oklab, var(--sc-ink) 80%, var(--sc-canvas)); }
.legal th { color: var(--sc-ink); font-weight: 500; }
@media (max-width: 640px) { .legal table, .legal tbody, .legal tr, .legal th, .legal td { display: block; } .legal thead { display: none; } .legal td { border: 0; padding: 0.15rem 0; } .legal tr { padding: 0.7rem 0; border-top: 1px solid var(--sc-hairline); } .legal td:first-child { color: var(--sc-ink); font-weight: 500; } }
.legal .updated { font-family: var(--sc-font-mono); font-size: var(--sc-t-xs); letter-spacing: 0.06em; color: var(--sc-ink-soft); }

/* footer */
.site-foot { position: relative; z-index: 1; border-top: 1px solid var(--sc-hairline); background: color-mix(in oklab, var(--sc-canvas) 92%, transparent); }
.site-foot__in { display: grid; gap: var(--sc-6); padding: var(--sc-8) var(--sc-gutter) calc(var(--sc-6) + 4rem); }
@media (min-width: 960px) { .site-foot__in { grid-template-columns: minmax(0, 1fr) auto; } .site-foot__legal { grid-column: 1 / -1; } }
.site-foot__id { display: flex; gap: var(--sc-4); align-items: flex-start; }
.site-foot__id div { display: grid; gap: 0.2rem; }
.site-foot__id strong { font-weight: 500; }
.site-foot__id div span { color: var(--sc-ink-soft); font-size: var(--sc-t-sm); }
.site-foot__nav { display: grid; grid-template-columns: repeat(2, minmax(0, auto)); gap: var(--sc-2) var(--sc-7); font-size: var(--sc-t-sm); align-content: start; }
.site-foot__nav a, .site-foot__legal a { color: var(--sc-ink-soft); text-decoration: none; }
.site-foot__nav a:hover, .site-foot__legal a:hover { color: var(--sc-ink); }
.site-foot__legal { margin: 0; display: flex; flex-wrap: wrap; gap: var(--sc-2) var(--sc-6); font-size: var(--sc-t-xs); color: var(--sc-ink-soft); padding-top: var(--sc-5); border-top: 1px solid var(--sc-hairline); }

/* ======================================================= v10 · calculator -- */
.kc-wrap { display: grid; gap: var(--sc-7); }
.kc-intro { display: grid; gap: var(--sc-4); max-width: 46rem; }
.kc-intro .sc-body { margin: 0; color: var(--sc-ink-soft); max-width: 56ch; }
.kc { border-radius: 1.5rem; padding: clamp(1rem, 2.5vw, 2rem); display: grid; gap: var(--sc-5); }
.kc__top { display: flex; flex-wrap: wrap; gap: var(--sc-3); align-items: center; justify-content: space-between; }
.kc__modes { display: inline-flex; gap: 0.25rem; padding: 0.3rem; border-radius: var(--sc-r-pill); box-shadow: inset 0 0 0 1px var(--sc-hairline-strong); }
.kc__modes label, .kc__seg label { position: relative; cursor: pointer; }
.kc__modes input, .kc__seg input { position: absolute; inset: 0; opacity: 0; cursor: pointer; margin: 0; }
.kc__modes span { display: inline-block; padding: 0.5rem 1rem; border-radius: var(--sc-r-pill); font-size: var(--sc-t-sm); color: var(--sc-ink-soft); transition: background 250ms, color 250ms; }
.kc__modes input:checked + span { color: var(--sc-accent-ink); background: linear-gradient(160deg, var(--k-ti-hi), var(--k-ti-lo)); }
.kc__modes input:focus-visible + span, .kc__seg input:focus-visible + span { outline: 2px solid var(--k-ti-hi); outline-offset: 2px; }
.kc select { appearance: none; -webkit-appearance: none; padding: 0.65rem 2.2rem 0.65rem 0.9rem; border: 0; border-radius: var(--sc-r-md); color: var(--sc-ink); font: inherit; font-size: var(--sc-t-sm);
  background: color-mix(in oklab, var(--sc-canvas) 60%, transparent) url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'%3E%3Cpath d='M1 1l5 5 5-5' fill='none' stroke='%23aab3bd' stroke-width='1.6'/%3E%3C/svg%3E") no-repeat right 0.85rem center;
  box-shadow: inset 0 0 0 1px var(--sc-hairline-strong); max-width: 100%; }
.kc select option { background: var(--sc-surface); color: var(--sc-ink); }
.kc__presetnote { margin: 0; font-size: 0.8rem; color: var(--k-warm); }
.kc__body { display: grid; gap: var(--sc-6); }
@media (min-width: 1000px) { .kc__body { grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr); align-items: start; } .kc__out { position: sticky; top: 6rem; } }
.kc__in { display: grid; gap: var(--sc-6); }
.kc__group { border: 0; margin: 0; padding: 0; min-width: 0; display: grid; gap: var(--sc-4); grid-template-columns: repeat(2, minmax(0, 1fr)); }
.kc__group legend { padding: 0; margin-bottom: var(--sc-4); font-family: var(--sc-font-mono); font-size: var(--sc-t-xs); letter-spacing: 0.12em; text-transform: uppercase; color: var(--sc-ink-soft); }
.kc__f { display: grid; gap: 0.35rem; align-content: start; font-size: var(--sc-t-sm); color: color-mix(in oklab, var(--sc-ink) 82%, var(--sc-canvas)); }
.kc__f > span { display: flex; justify-content: space-between; gap: var(--sc-2); align-items: baseline; }
.kc__f small, .kc__tierhint, .kc__fine { font-size: 0.74rem; line-height: 1.4; color: var(--sc-ink-soft); }
.kc__tierhint, .kc__fine { margin: 0; grid-column: 1 / -1; }
.kc__f input[type="number"] { width: 100%; padding: 0.7rem 0.9rem; border: 0; border-radius: var(--sc-r-md); background: color-mix(in oklab, var(--sc-canvas) 60%, transparent); box-shadow: inset 0 0 0 1px var(--sc-hairline-strong); color: var(--sc-ink); font-family: var(--sc-font-mono); font-size: 16px; }
.kc__f input:focus-visible, .kc select:focus-visible { outline: none; box-shadow: inset 0 0 0 1.5px var(--k-ti-hi); }
.kc__f--range { grid-column: 1 / -1; }
.kc__f--range output { font-family: var(--sc-font-mono); color: var(--sc-ink); }
.kc__f--range input { width: 100%; accent-color: var(--k-teal); }
.kc__f select { width: 100%; }
.kc__seg { grid-column: 1 / -1; display: flex; flex-wrap: wrap; align-items: center; gap: var(--sc-2); }
.kc__segk { width: 7.5rem; font-size: var(--sc-t-sm); color: color-mix(in oklab, var(--sc-ink) 82%, var(--sc-canvas)); }
.kc__seg span:not(.kc__segk) { display: inline-block; padding: 0.45rem 0.9rem; border-radius: var(--sc-r-pill); font-size: var(--sc-t-sm); box-shadow: inset 0 0 0 1px var(--sc-hairline-strong); color: var(--sc-ink-soft); transition: background 200ms, color 200ms; }
.kc__seg input:checked + span { color: var(--sc-ink); background: color-mix(in oklab, var(--k-teal) 18%, transparent); box-shadow: inset 0 0 0 1px color-mix(in oklab, var(--k-teal) 55%, transparent); }
@media (max-width: 560px) { .kc__segk { width: 100%; } .kc__group { gap: var(--sc-4) var(--sc-3); } .kc__f small { display: none; } .kc__f--range small { display: block; } }
.kc__reset { padding: 0; border: 0; background: none; color: var(--k-teal); font: inherit; font-size: 0.74rem; text-decoration: underline; cursor: pointer; }
.kc__more { grid-column: 1 / -1; font-size: var(--sc-t-sm); }
.kc__more summary { cursor: pointer; color: var(--sc-ink-soft); padding: 0.3rem 0; }
.kc__moregrid { display: grid; gap: var(--sc-4); grid-template-columns: repeat(auto-fit, minmax(min(100%, 11rem), 1fr)); margin: var(--sc-3) 0; }
.kc[data-mode="quick"] .kc__d { display: none !important; }
.kc[data-mode="detailed"] .kc__q { display: none !important; }

.kc__out { display: grid; gap: var(--sc-5); padding: clamp(1rem, 2.4vw, 1.75rem); border-radius: 1.1rem; background: color-mix(in oklab, var(--sc-canvas) 55%, transparent); box-shadow: inset 0 0 0 1px var(--sc-hairline); }
.kc__summary { margin: 0; font-size: var(--sc-t-base); line-height: 1.5; color: color-mix(in oklab, var(--sc-ink) 88%, var(--sc-canvas)); }
.kc__summary b { font-weight: 500; color: var(--sc-ink); }
.kc__big { display: grid; gap: var(--sc-1); }
.kc__k, .kc__stats dt { font-family: var(--sc-font-mono); font-size: 0.64rem; letter-spacing: 0.12em; text-transform: uppercase; color: var(--sc-ink-soft); }
.kc__v { font-family: var(--sc-font-display); font-weight: 330; font-size: clamp(2.6rem, 1.6rem + 3vw, 4rem); line-height: 1; letter-spacing: -0.03em; font-variant-numeric: tabular-nums; }
.kc__v.neg { color: var(--k-warm); }
.kc__stats { margin: 0; display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: var(--sc-4) var(--sc-5); padding-top: var(--sc-4); border-top: 1px solid var(--sc-hairline); }
.kc__stats div { display: grid; gap: 0.3rem; align-content: start; }
.kc__stats dd { margin: 0; font-family: var(--sc-font-display); font-size: var(--sc-t-xl); line-height: 1.05; letter-spacing: -0.02em; font-variant-numeric: tabular-nums; }
.kc__chart { margin: 0; display: grid; gap: var(--sc-2); }
.kc__chart figcaption { font-size: var(--sc-t-xs); color: var(--sc-ink-soft); }
.kc__plot { position: relative; height: 9rem; }
.kc__plot svg { width: 100%; height: 100%; display: block; overflow: visible; }
.kc__plot .zero { stroke: var(--sc-hairline-strong); stroke-width: 1; vector-effect: non-scaling-stroke; }
.kc__plot .bar { fill: var(--k-teal); pointer-events: none; transition: opacity 150ms; }
.kc__plot .bar.neg { fill: color-mix(in oklab, var(--sc-ink-soft) 50%, transparent); }
.kc__plot .bar.on { opacity: 0.75; }
.kc__plot .hit { fill: transparent; }
.kc__tip { position: absolute; z-index: 2; transform: translate(-50%, calc(-100% - 8px)); padding: 0.35rem 0.6rem; border-radius: 0.5rem; background: var(--sc-surface); box-shadow: var(--k-float); font-size: 0.75rem; white-space: nowrap; pointer-events: none; }
.kc__years { display: grid; grid-auto-flow: column; grid-auto-columns: 1fr; font-family: var(--sc-font-mono); font-size: 0.64rem; color: var(--sc-ink-soft); text-align: center; }
.kc__chart details { font-size: var(--sc-t-xs); color: var(--sc-ink-soft); }
.kc__chart summary { cursor: pointer; }
.kc__chart table { width: 100%; border-collapse: collapse; margin-top: var(--sc-2); font-variant-numeric: tabular-nums; }
.kc__chart th, .kc__chart td { text-align: right; padding: 0.3rem 0.35rem; border-bottom: 1px solid var(--sc-hairline); } .kc__chart th:first-child, .kc__chart td:first-child { text-align: left; }
.kc__actions { display: flex; flex-wrap: wrap; gap: var(--sc-3); }
.kc__actions .btn { border: 0; cursor: pointer; font: inherit; font-size: var(--sc-t-sm); font-weight: 500; }

/* ================================================== v10 · story on phones -- */
/* On phones the chapter text and its screen demo used to be fixed on top of each other.
   Now each chapter is a normal block: before, after, then the demo, in reading order. */
@media (max-width: 960px) {
  .chapter, .chapter--short, .chapter--firms { min-height: 0; padding: 7rem 0 22vh; }
  .chapter--short { min-height: 100svh; padding-bottom: 12vh; display: flex; align-items: flex-end; }
  .chapter__copy { position: relative; top: auto; padding-bottom: 0; width: auto; margin: 0 var(--sc-gutter); opacity: 1 !important; }
  .chapter .state { display: inline-flex; }
  .chapter .swap > * { opacity: 1 !important; translate: none !important; display: grid; gap: var(--sc-2); }
  .chapter .swap > [data-state="after"], .chapter.is-after .swap > [data-state="before"] { display: none; }
  .chapter.is-after .swap > [data-state="after"] { display: grid; animation: k-rise 450ms var(--sc-ease-out) both; }
  .demo { position: relative; inset: auto; z-index: auto; margin: var(--sc-5) var(--sc-gutter) 0; width: auto; opacity: 1; translate: none; background: color-mix(in oklab, var(--sc-surface) 90%, transparent); }
  .demo__bar { display: flex; }
}
@media (min-width: 1100px) { .tiles--4 { grid-template-columns: repeat(4, minmax(0, 1fr)); } }
.site-foot__id .brand__mono { flex: none; }

/* ======================================================== v11 additions -- */
/* Before / After are buttons: visitors can flip a chapter themselves. */
.state button { font: inherit; font-family: var(--sc-font-mono); }
.state button:hover { color: var(--sc-ink); }
.state button:focus-visible { outline: 2px solid var(--sc-ink); outline-offset: 2px; }
.chapter__copy .state { cursor: default; }

/* The demo screen moves per chapter on desktop so it never sits on a face. */
@media (min-width: 961px) {
  .demo { backdrop-filter: blur(16px) saturate(1.25); -webkit-backdrop-filter: blur(16px) saturate(1.25); }
  #requests .demo { top: auto; bottom: clamp(4.75rem, 10vh, 6.5rem); }
  #systems .demo, #any-firm .demo { right: auto; left: 47vw; top: auto; bottom: clamp(1.5rem, 6vh, 3.5rem); width: min(24rem, 28vw); }
  #any-firm .demo { width: min(32rem, 36vw); }
  #any-firm .ex { grid-template-columns: repeat(2, minmax(0, 1fr)); column-gap: 1.2rem; }
  #any-firm .ex li:nth-last-child(2) { border-bottom: 0; }
  .chapter__copy { padding-bottom: 0; top: clamp(6rem, 15vh, 9rem); }
}

/* Hero: the headline arrives in three beats, then recedes as the camera pushes in. */
.hero-skip { align-self: center; margin-left: var(--sc-2); font-size: var(--sc-t-sm); color: var(--sc-ink-soft); text-decoration: underline; text-decoration-color: var(--sc-hairline-strong); text-underline-offset: 0.3em; }
.hero-skip:hover { color: var(--sc-ink); text-decoration-color: currentColor; }
.intro-play { border: 0; cursor: pointer; font: inherit; font-size: var(--sc-t-sm); font-weight: 500; padding-left: 0.75rem; }
.intro-play__i { position: relative; flex: none; width: 1.6rem; height: 1.6rem; border-radius: 50%; box-shadow: inset 0 0 0 1px color-mix(in oklab, var(--sc-ink) 55%, transparent); }
.intro-play__i::after { content: ""; position: absolute; left: 54%; top: 50%; translate: -50% -50%; border-left: 0.48rem solid currentColor; border-top: 0.3rem solid transparent; border-bottom: 0.3rem solid transparent; }
.intro-play:hover .intro-play__i { box-shadow: inset 0 0 0 1px var(--sc-ink), 0 0 0 0.35rem color-mix(in oklab, var(--sc-ink) 8%, transparent); }
@keyframes k-rise { from { opacity: 0; translate: 0 1.1rem; filter: blur(8px); } }
.page-index #start .chapter__copy > * { animation: k-rise 1100ms var(--sc-ease-out) both; }
.page-index #start .chapter__copy > :nth-child(1) { animation-delay: 150ms; }
.page-index #start .chapter__copy h1 { animation-delay: 300ms; }
.page-index #start .chapter__copy h1 .em { display: inline-block; animation: k-rise 1200ms var(--sc-ease-out) 900ms both; }
.page-index #start .chapter__copy > :nth-child(3) { animation-delay: 1300ms; }
.page-index #start .chapter__copy > :nth-child(4) { animation-delay: 1550ms; }
@supports (animation-timeline: scroll()) {
  @keyframes k-recede { to { translate: 0 -7vh; scale: 0.94; filter: blur(3px); } }
  @keyframes k-push { to { scale: 1.09; } }
  @media (min-width: 961px) and (prefers-reduced-motion: no-preference) {
    .page-index #start .chapter__copy { transform-origin: 0 40%; animation: k-recede linear both; animation-timeline: scroll(root); animation-range: 0 95vh; }
    .page-index .film video:first-of-type { animation: k-push linear both; animation-timeline: scroll(root); animation-range: 0 100vh; }
  }
}
@media (prefers-reduced-motion: reduce) { .page-index #start .chapter__copy > *, .page-index #start .chapter__copy h1 .em { animation: none; } }

/* Chapter rail: a quiet way to jump anywhere in the story. Labels show on hover. */
.rail { position: fixed; z-index: var(--sc-z-chrome); right: clamp(0.6rem, 1.4vw, 1.4rem); top: 50%; translate: 0 -50%; display: none; flex-direction: column; align-items: flex-end; }
@media (min-width: 1100px) and (hover: hover) { .rail { display: flex; } }
.rail a { display: flex; align-items: center; justify-content: flex-end; gap: 0.7rem; padding: 0.42rem 0; color: var(--sc-ink-soft); text-decoration: none; font-family: var(--sc-font-mono); font-size: 0.64rem; letter-spacing: 0.12em; text-transform: uppercase; }
.rail a::after { content: ""; width: 0.9rem; height: 1px; background: currentColor; opacity: 0.55; transition: width 300ms var(--sc-ease-out), opacity 300ms var(--sc-ease-out); }
.rail a span { opacity: 0; translate: 0.4rem 0; padding: 0.2rem 0.5rem; border-radius: var(--sc-r-pill); background: color-mix(in oklab, var(--sc-canvas) 60%, transparent); backdrop-filter: blur(8px); -webkit-backdrop-filter: blur(8px); transition: opacity 250ms var(--sc-ease-out), translate 250ms var(--sc-ease-out); }
.rail:hover a span, .rail a:focus-visible span { opacity: 1; translate: 0 0; }
.rail a:hover, .rail a[aria-current] { color: var(--sc-ink); }
.rail a[aria-current]::after { width: 1.9rem; opacity: 1; }
.rail a:focus-visible { outline: none; } .rail a:focus-visible::after { outline: 2px solid var(--sc-ink); outline-offset: 3px; }
.chat-open .rail { opacity: 0; pointer-events: none; }

/* Introduction player */
.intro-bar { position: fixed; z-index: calc(var(--sc-z-chrome) + 1); left: var(--sc-gutter); bottom: calc(max(1.25rem, env(safe-area-inset-bottom, 0px))); display: grid; grid-template-columns: minmax(0, 1fr) auto auto; grid-template-areas: "txt pp x" "track track track"; align-items: center; gap: 0.55rem 0.5rem; width: min(23rem, calc(100vw - 2 * var(--sc-gutter) - 4.5rem)); padding: 0.7rem 0.7rem 0.85rem 1rem; border-radius: 1rem; animation: k-rise 500ms var(--sc-ease-out) both; }
.intro-bar[hidden] { display: none; }
.intro-bar__txt { grid-area: txt; display: grid; gap: 0.1rem; min-width: 0; }
.intro-bar__k { font-family: var(--sc-font-mono); font-size: 0.62rem; letter-spacing: 0.12em; text-transform: uppercase; color: var(--sc-ink-soft); }
.intro-bar__now { font-size: var(--sc-t-sm); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.intro-bar__track { grid-area: track; height: 2px; border-radius: 2px; overflow: hidden; background: var(--sc-hairline-strong); }
.intro-bar__track i { display: block; height: 100%; background: var(--sc-ink); transform-origin: left; transform: scaleX(0); }
.intro-bar button { appearance: none; border: 0; width: 2.4rem; height: 2.4rem; border-radius: 50%; display: grid; place-items: center; cursor: pointer; color: var(--sc-ink); background: color-mix(in oklab, var(--sc-ink) 10%, transparent); font: inherit; font-size: 1.25rem; line-height: 1; }
.intro-bar button:hover { background: color-mix(in oklab, var(--sc-ink) 18%, transparent); }
.intro-bar button:focus-visible { outline: 2px solid var(--sc-ink); outline-offset: 2px; }
.intro-bar__pp { grid-area: pp; } .intro-bar__x { grid-area: x; }
.intro-bar__pp span { width: 0.7rem; height: 0.8rem; border-left: 3px solid currentColor; border-right: 3px solid currentColor; box-sizing: border-box; }
.intro-bar.is-paused .intro-bar__pp span { width: 0; height: 0; border-right: 0; border-left: 0.7rem solid currentColor; border-top: 0.42rem solid transparent; border-bottom: 0.42rem solid transparent; margin-left: 0.2rem; }
.intro-bar.is-done .intro-bar__pp { visibility: hidden; }

/* Short laptop screens: smaller story type so each chapter's text stays in view while it plays. */
@media (min-width: 961px) and (max-height: 820px) {
  .chapter h2 { font-size: clamp(2.2rem, 1rem + 2.6vw, 3.1rem); }
  .chapter p.lede { font-size: var(--sc-t-base); }
  .chapter__copy { gap: var(--sc-3); top: clamp(5.5rem, 13vh, 7rem); }
}

.page-book .film--still { --dim0: 0.46; }
.page-how-we-work .film--still { --dim0: 0.3; }

/* v12: Before / After switch the film with a short cross-fade */
.film--cut video { transition: opacity 500ms var(--sc-ease-out); }
.state button { min-height: 2.25rem; padding-inline: 0.85rem; }
/* v12: shade, dim and cursor light always sit above every clip (clips use z-index 0-2 while they cross-fade) */
.film__shade { z-index: 5; } .film__dim { z-index: 6; } .glow { z-index: 7; }

/* ======================================== v12 · introduction player -- */
/* A full-screen player: the story plays scene by scene with cross-fading
   clips. Nothing scrolls underneath, so it stays smooth on every device. */
.tour { position: fixed; inset: 0; z-index: 200; background: #050607; color: var(--sc-ink); opacity: 0; transition: opacity 350ms var(--sc-ease-out); overflow: hidden; }
.tour.open { opacity: 1; }
.tour[hidden] { display: none; }
html.tour-open { overflow: hidden; }
.tour-open .chat-fab, .tour-open .rail, .tour-open .cursor-dot { display: none; }
.tour__film video { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; opacity: 0; transition: opacity 900ms var(--sc-ease-out); }
.tour__film video.on { opacity: 1; }
.tour__shade { position: absolute; inset: 0; background: linear-gradient(90deg, rgb(5 6 7 / .86) 0%, rgb(5 6 7 / .55) 38%, rgb(5 6 7 / .12) 72%), linear-gradient(0deg, rgb(5 6 7 / .72) 0%, transparent 46%), linear-gradient(180deg, rgb(5 6 7 / .65) 0%, transparent 20%); }
.tour__top { position: absolute; z-index: 2; left: 0; right: 0; top: 0; display: grid; gap: 0.75rem; padding: max(1rem, env(safe-area-inset-top, 0px)) var(--sc-gutter) 0; }
.tour__segs { display: flex; gap: 0.35rem; }
.tour__segs i { flex: 1; height: 3px; border-radius: 3px; overflow: hidden; background: rgb(255 255 255 / .2); }
.tour__segs b { display: block; height: 100%; background: var(--sc-ink); transform-origin: left; transform: scaleX(0); }
.tour__bar { display: flex; align-items: center; justify-content: space-between; gap: 1rem; }
.tour__now { font-family: var(--sc-font-mono); font-size: 0.68rem; letter-spacing: 0.12em; text-transform: uppercase; color: var(--sc-ink-soft); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.tour__ctl { display: flex; gap: 0.4rem; flex: none; }
.tour__ctl button { appearance: none; border: 0; width: 2.75rem; height: 2.75rem; border-radius: 50%; display: grid; place-items: center; cursor: pointer; color: var(--sc-ink); font: inherit; font-size: 1.5rem; line-height: 1; background: rgb(255 255 255 / .1); backdrop-filter: blur(10px); -webkit-backdrop-filter: blur(10px); transition: background 200ms; }
.tour__ctl button:hover { background: rgb(255 255 255 / .2); }
.tour__ctl button:focus-visible { outline: 2px solid var(--sc-ink); outline-offset: 2px; }
.tour__pp span { width: 0.75rem; height: 0.85rem; border-left: 3px solid currentColor; border-right: 3px solid currentColor; box-sizing: border-box; }
.tour.is-paused .tour__pp span { width: 0; height: 0; border-right: 0; border-left: 0.75rem solid currentColor; border-top: 0.45rem solid transparent; border-bottom: 0.45rem solid transparent; margin-left: 0.2rem; }
.tour.is-end .tour__pp { visibility: hidden; }
.tour__stage { position: absolute; z-index: 2; left: var(--sc-gutter); right: var(--sc-gutter); bottom: clamp(2rem, 8vh, 5rem); display: grid; grid-template-columns: minmax(0, 38rem) minmax(0, 25rem); justify-content: space-between; align-items: end; gap: 2rem; }
.tour__copy { display: grid; gap: 0.9rem; text-shadow: 0 1px 2px rgb(0 0 0 / .45), 0 2px 18px rgb(0 0 0 / .45); }
.tour__copy > * { margin: 0; }
.tour__copy.in > * { animation: k-rise 800ms var(--sc-ease-out) both; }
.tour__copy.in > :nth-child(2) { animation-delay: 80ms; } .tour__copy.in > :nth-child(3) { animation-delay: 160ms; } .tour__copy.in > :nth-child(4) { animation-delay: 300ms; } .tour__copy.in > :nth-child(5) { animation-delay: 420ms; }
.tour__copy h2 { font-family: var(--sc-font-display); font-weight: 330; font-size: clamp(2.4rem, 1rem + 3.2vw, 4.4rem); line-height: 1; letter-spacing: -0.03em; text-wrap: balance; }
.tour__copy .lede { font-size: var(--sc-t-lg); line-height: 1.55; max-width: 40ch; color: color-mix(in oklab, var(--sc-ink) 88%, var(--sc-canvas)); }
.tour__tag { font-family: var(--sc-font-mono); font-size: 0.68rem; letter-spacing: 0.12em; text-transform: uppercase; padding: 0.35rem 0.75rem; border-radius: var(--sc-r-pill); width: max-content; text-shadow: none; }
.tour__tag--before { color: var(--k-warm); background: color-mix(in oklab, var(--k-warm) 22%, transparent); }
.tour__tag--after { color: var(--sc-ink); background: color-mix(in oklab, var(--k-teal) 30%, transparent); }
.tour__demo .demo { position: relative; inset: auto; z-index: auto; margin: 0; width: 100%; opacity: 0; translate: 0 0.8rem; pointer-events: none; background: color-mix(in oklab, var(--sc-surface) 62%, transparent); backdrop-filter: blur(16px) saturate(1.2); -webkit-backdrop-filter: blur(16px) saturate(1.2); transition: opacity 600ms var(--sc-ease-out) 250ms, translate 600ms var(--sc-ease-out) 250ms; }
.tour__demo.on .demo { opacity: 1; translate: 0 0; }
.tour__demo.on .bars i { transform: scaleY(1); }
.tour__demo .ex { grid-template-columns: repeat(2, minmax(0, 1fr)); column-gap: 1.2rem; }
@media (max-width: 960px) {
  .tour__shade { background: linear-gradient(0deg, rgb(5 6 7 / .92) 0%, rgb(5 6 7 / .7) 45%, rgb(5 6 7 / .15) 75%), linear-gradient(180deg, rgb(5 6 7 / .6) 0%, transparent 20%); }
  .tour__stage { grid-template-columns: minmax(0, 1fr); gap: 1rem; bottom: max(1.5rem, env(safe-area-inset-bottom, 0px)); }
  .tour__demo { order: -1; }
  .tour__demo .demo__bar { display: none; }
  .tour__demo .ex { grid-template-columns: minmax(0, 1fr); }
  .tour__copy { gap: 0.6rem; }
  .tour__copy h2 { font-size: clamp(1.9rem, 8vw, 2.6rem); }
  .tour__copy .lede { font-size: 0.95rem; }
  .tour__ctl button { width: 2.5rem; height: 2.5rem; }
}
@media (max-width: 960px) and (max-height: 700px) { .tour__demo { display: none; } }
@media (prefers-reduced-motion: reduce) { .tour__copy.in > *, .tour__film video { animation: none; transition: none; } }
.tour__now { flex: 1; min-width: 0; }
@media (max-width: 960px) { .tour__demo .demo--list { display: none; } }

/* ------------------------------------------------------------- v13 -- */
/* The header turns to frosted glass once the page moves, so nothing slides under the menu links.
   The glass sits on a pseudo-element: a backdrop-filter on .bar itself would trap the
   fixed full-screen phone menu inside the header. */
.bar::before { content: ""; position: absolute; inset: 0; z-index: -2; pointer-events: none; opacity: 0;
  background: color-mix(in oklab, var(--sc-canvas) 66%, transparent);
  backdrop-filter: blur(18px) saturate(1.25); -webkit-backdrop-filter: blur(18px) saturate(1.25);
  box-shadow: 0 1px 0 rgb(255 255 255 / .06), 0 12px 32px -18px rgb(0 0 0 / .8);
  transition: opacity 320ms var(--sc-ease-out); }
.bar.is-scrolled::before { opacity: 1; }
.bar.is-scrolled { background: none; }
.menu-open .bar::before { opacity: 0; }

/* the hero's italic line stays readable over the bright window */
.page-index #start .chapter__copy h1 .em { background-image: linear-gradient(100deg, #ffffff, #cfd6dd 80%); }
@media (min-width: 961px) {
.page-index #start .chapter__copy::before { content: ""; position: absolute; z-index: -1; inset: -18% -22% -18% -30%; pointer-events: none;
  background: radial-gradient(closest-side, rgb(8 9 11 / .5), rgb(8 9 11 / .22) 60%, transparent); }
}
.page-index #start .chapter__copy { isolation: isolate; }
/* the introduction player cuts through dark too: the old scene leaves before the new one arrives */
.tour__film video { transition: opacity 450ms var(--sc-ease-out); }
.tour__film video.on { transition: opacity 850ms var(--sc-ease-out) 280ms; }

/* ------------------------------------------------ v13: calculator look -- */
.kc { position: relative; overflow: clip; gap: var(--sc-6);
  background: linear-gradient(180deg, color-mix(in oklab, var(--sc-surface) 72%, transparent), color-mix(in oklab, var(--sc-canvas) 78%, transparent)); }
.kc::before { content: ""; position: absolute; inset: 0 0 auto 0; height: 1px; pointer-events: none;
  background: linear-gradient(90deg, transparent, color-mix(in oklab, var(--k-ti-hi) 45%, transparent), transparent); }
.kc__group { gap: var(--sc-5) var(--sc-4); }
.kc__group legend { display: flex; align-items: center; gap: var(--sc-3); width: 100%; }
.kc__group legend::after { content: ""; flex: 1; height: 1px; background: var(--sc-hairline); }
.kc__f > span { font-weight: 450; color: var(--sc-ink); }
/* number fields: − value unit + */
.kc__num { position: relative; display: flex; align-items: stretch; border-radius: 0.85rem;
  background: color-mix(in oklab, var(--sc-canvas) 62%, transparent); box-shadow: inset 0 0 0 1px var(--sc-hairline-strong); transition: box-shadow 200ms; }
.kc__num:focus-within { box-shadow: inset 0 0 0 1.5px var(--k-ti-hi), 0 0 0 4px color-mix(in oklab, var(--k-ti-hi) 10%, transparent); }
.kc__f .kc__num input[type="number"] { flex: 1; min-width: 0; background: none; box-shadow: none; padding: 0.75rem 0.25rem; text-align: center; font-size: 1.05rem; -moz-appearance: textfield; }
.kc__f .kc__num.has-unit input[type="number"] { text-align: right; padding-right: 0.35rem; }
.kc__num input::-webkit-outer-spin-button, .kc__num input::-webkit-inner-spin-button { -webkit-appearance: none; margin: 0; }
.kc__unit { align-self: center; padding-right: 0.25rem; font-family: var(--sc-font-mono); font-size: 0.74rem; color: var(--sc-ink-soft); white-space: nowrap; }
.kc__step { flex: none; width: 2.6rem; border: 0; background: none; color: var(--sc-ink-soft); font-size: 1.15rem; line-height: 1; cursor: pointer; border-radius: 0.85rem; transition: color 150ms, background 150ms; touch-action: manipulation; }
.kc__step:hover { color: var(--sc-ink); background: color-mix(in oklab, var(--sc-ink) 6%, transparent); }
.kc__step:active { background: color-mix(in oklab, var(--sc-ink) 12%, transparent); }
.kc__step:focus-visible { outline: 2px solid var(--k-ti-hi); outline-offset: -2px; }
/* slider with a filled track */
.kc__f--range output { padding: 0.15rem 0.55rem; border-radius: var(--sc-r-pill); background: color-mix(in oklab, var(--k-teal) 16%, transparent); color: var(--sc-ink); }
.kc__f--range input[type="range"] { -webkit-appearance: none; appearance: none; height: 2rem; background: none; margin: 0; cursor: pointer; }
.kc__f--range input[type="range"]::-webkit-slider-runnable-track { height: 6px; border-radius: 6px; background: linear-gradient(90deg, var(--k-teal) var(--p, 70%), color-mix(in oklab, var(--sc-ink) 14%, transparent) var(--p, 70%)); }
.kc__f--range input[type="range"]::-moz-range-track { height: 6px; border-radius: 6px; background: color-mix(in oklab, var(--sc-ink) 14%, transparent); }
.kc__f--range input[type="range"]::-moz-range-progress { height: 6px; border-radius: 6px; background: var(--k-teal); }
.kc__f--range input[type="range"]::-webkit-slider-thumb { -webkit-appearance: none; width: 22px; height: 22px; margin-top: -8px; border-radius: 50%; border: 0;
  background: linear-gradient(160deg, var(--k-ti-hi), var(--k-ti-lo)); box-shadow: 0 0 0 4px color-mix(in oklab, var(--k-teal) 30%, transparent), 0 4px 12px rgb(0 0 0 / .5); }
.kc__f--range input[type="range"]::-moz-range-thumb { width: 22px; height: 22px; border-radius: 50%; border: 0; background: linear-gradient(160deg, var(--k-ti-hi), var(--k-ti-lo)); box-shadow: 0 0 0 4px color-mix(in oklab, var(--k-teal) 30%, transparent); }
.kc__f--range input[type="range"]:focus-visible { outline: none; }
.kc__f--range input[type="range"]:focus-visible::-webkit-slider-thumb { box-shadow: 0 0 0 4px var(--k-ti-hi); }
/* the result panel */
.kc__out { overflow: clip; gap: var(--sc-5); border-radius: 1.25rem;
  background: radial-gradient(28rem 16rem at 100% 0%, color-mix(in oklab, var(--k-teal) 12%, transparent), transparent 70%), color-mix(in oklab, var(--sc-canvas) 66%, transparent);
  box-shadow: inset 0 0 0 1px color-mix(in oklab, var(--k-teal) 22%, var(--sc-hairline)); }
.kc__v { background: linear-gradient(100deg, #ffffff, color-mix(in oklab, var(--k-teal) 55%, #ffffff)); -webkit-background-clip: text; background-clip: text; color: transparent; padding-bottom: 0.06em; }
.kc__v.neg { background: none; color: var(--k-warm); }
.kc__meter { display: grid; gap: 0.55rem; }
.kc__meter .kc__k { margin: 0 0 0.15rem; }
.kc__mrow { display: grid; grid-template-columns: 3.4rem minmax(0, 1fr) 5.5rem; align-items: center; gap: var(--sc-3); font-size: var(--sc-t-xs); color: var(--sc-ink-soft); }
.kc__mrow i { display: block; height: 0.6rem; border-radius: 1rem; background: color-mix(in oklab, var(--sc-ink) 7%, transparent); overflow: hidden; }
.kc__mrow b { display: block; height: 100%; border-radius: inherit; background: color-mix(in oklab, var(--k-warm) 70%, transparent); transition: width 600ms var(--sc-ease-out); }
.kc__mrow--after b { background: var(--k-teal); }
.kc__mrow em { font-style: normal; text-align: right; font-family: var(--sc-font-mono); color: var(--sc-ink); font-variant-numeric: tabular-nums; }
.kc__stats { gap: var(--sc-3); padding-top: 0; border-top: 0; }
.kc__stats div { padding: 0.8rem 0.9rem; border-radius: 0.9rem; background: color-mix(in oklab, var(--sc-ink) 4%, transparent); box-shadow: inset 0 0 0 1px var(--sc-hairline); }
.kc__stats dd { font-size: var(--sc-t-lg); }
.kc__seg span:not(.kc__segk) { padding: 0.5rem 1rem; }
/* phones: a dock keeps the result in sight while typing */
.kc__dock { position: fixed; z-index: calc(var(--sc-z-chrome) - 1); left: var(--sc-gutter); right: calc(var(--sc-gutter) + 3.6rem);
  bottom: calc(max(1rem, env(safe-area-inset-bottom, 0px))); display: none; align-items: center; justify-content: space-between; gap: var(--sc-3);
  padding: 0.55rem 0.55rem 0.55rem 1rem; border-radius: 1rem; background: color-mix(in oklab, var(--sc-surface) 82%, transparent);
  backdrop-filter: blur(16px) saturate(1.2); -webkit-backdrop-filter: blur(16px) saturate(1.2); box-shadow: var(--k-float);
  opacity: 0; translate: 0 1rem; pointer-events: none; transition: opacity 260ms var(--sc-ease-out), translate 260ms var(--sc-ease-out); }
.kc__dock > span { display: grid; line-height: 1.15; min-width: 0; }
.kc__dock small { font-family: var(--sc-font-mono); font-size: 0.6rem; letter-spacing: 0.1em; text-transform: uppercase; color: var(--sc-ink-soft); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.kc__dock b { font-family: var(--sc-font-display); font-weight: 400; font-size: 1.35rem; letter-spacing: -0.02em; font-variant-numeric: tabular-nums; }
.kc__dock button { flex: none; border: 0; cursor: pointer; padding: 0.55rem 0.85rem; border-radius: var(--sc-r-pill); font: inherit; font-size: 0.8rem; font-weight: 500; color: var(--sc-accent-ink); background: linear-gradient(160deg, var(--k-ti-hi), var(--k-ti-lo)); }
@media (max-width: 999px) { .kc__dock { display: flex; } .kc__dock.is-on { opacity: 1; translate: 0 0; pointer-events: auto; } }
@media (max-width: 560px) {
  .kc { padding: 0.9rem; border-radius: 1.25rem; }
  .kc__top { display: grid; grid-template-columns: minmax(0, 1fr); }
  .kc__modes { width: 100%; } .kc__modes label { flex: 1; text-align: center; } .kc__modes span { width: 100%; padding-inline: 0.5rem; }
  .kc__preset, .kc__preset select { width: 100%; }
  .kc__group { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: var(--sc-4) var(--sc-3); }
  .kc__step { width: 2.25rem; }
  .kc__f .kc__num input[type="number"] { font-size: 16px; }
  .kc__unit { font-size: 0.66rem; }
  .kc__out { padding: 1rem; }
  .kc__mrow { grid-template-columns: 2.9rem minmax(0, 1fr) 4.6rem; }
  .kc__stats dd { font-size: 1.15rem; }
}

/* ======================================================= v13 · phones -- */
/* Calmer type on small screens: the scale steps down a size, sections breathe less. */
@media (max-width: 560px) {
  :root {
    --sc-t-xs: 0.7rem; --sc-t-sm: 0.84rem; --sc-t-base: 0.96rem; --sc-t-lg: 1.04rem;
    --sc-t-xl: 1.35rem; --sc-t-2xl: 1.7rem; --sc-t-3xl: 2.05rem; --sc-t-4xl: 2.5rem;
    --sc-section: 3.75rem;
  }
  .chapter h1 { font-size: clamp(2.1rem, 9.4vw, 2.7rem); }
  .chapter h2 { font-size: clamp(1.65rem, 7.2vw, 2.15rem); line-height: 1.05; }
  .page-hero h1 { font-size: clamp(2.05rem, 9.2vw, 2.7rem); line-height: 1.02; }
  .page-hero { min-height: 72svh; padding-top: 6rem; padding-bottom: 2.5rem; }
  .page-hero .lede, .chapter p.lede { font-size: var(--sc-t-base); line-height: 1.55; }
  .statement { line-height: 1.06; }
  .label { font-size: 0.66rem; letter-spacing: 0.12em; }
  .btn { font-size: 0.88rem; }
  .bar { padding-block: calc(env(safe-area-inset-top, 0px) + 0.7rem) 0.7rem; }
  .bar__cta { padding: 0.55rem 0.95rem; font-size: 0.84rem; }
  .demo { font-size: 0.86rem; }
}

/* Portrait screens: the scene is framed in the top of the screen, sharp and less zoomed,
   and fades into the page; text reads on its own glass instead of under a heavy shade. */
@media (max-width: 960px) and (max-aspect-ratio: 1/1) {
  .film video { height: 70svh; -webkit-mask-image: linear-gradient(180deg, #000 58%, transparent 98%); mask-image: linear-gradient(180deg, #000 58%, transparent 98%); }
  .tour__film video { height: 100%; -webkit-mask-image: none; mask-image: none; }
  .film__shade { background: linear-gradient(180deg, rgb(8 9 11 / .55) 0%, rgb(8 9 11 / .08) 18%, rgb(8 9 11 / .12) 40%, rgb(8 9 11 / .7) 62%, rgb(8 9 11 / .94) 78%); }
  /* home: each chapter opens on its scene, then the words arrive on a glass card */
  .page-index .chapter:not(#start) { padding-top: 40svh; }
  .page-index .chapter:not(#start) .chapter__copy { padding: 1.15rem 1.15rem 1.3rem; border-radius: 1.25rem; text-shadow: none;
    background: color-mix(in oklab, var(--sc-canvas) 70%, transparent); backdrop-filter: blur(14px) saturate(1.15); -webkit-backdrop-filter: blur(14px) saturate(1.15);
    box-shadow: inset 0 0 0 1px var(--sc-hairline), 0 18px 40px -20px rgb(0 0 0 / .8); }
  .page-index .chapter .demo { margin-top: var(--sc-3); }
  .page-index #start { padding-bottom: 9svh; }
}
.kc[data-mode="quick"] .kc__stats .kc__q { grid-column: 1 / -1; }
.kc[data-mode="detailed"] .kc__stats > div:last-child { grid-column: 1 / -1; }

/* ================================================== v15 · calculators -- */
.cx-wrap { display: grid; gap: var(--sc-6); }
.cx-intro { display: grid; gap: var(--sc-4); max-width: 46rem; }
.cx-intro .sc-body { margin: 0; color: var(--sc-ink-soft); max-width: 56ch; }
.cx-tabs { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: var(--sc-3); max-width: 40rem; }
.cx-tabs button { appearance: none; border: 0; cursor: pointer; text-align: left; display: grid; gap: 0.15rem; padding: 0.85rem 1.1rem; border-radius: 1rem; color: var(--sc-ink-soft); font: inherit;
  background: color-mix(in oklab, var(--sc-surface) 55%, transparent); box-shadow: inset 0 0 0 1px var(--sc-hairline-strong); transition: background 200ms, box-shadow 200ms, color 200ms; }
.cx-tabs button b { font-family: var(--sc-font-display); font-weight: 600; font-size: 1.02rem; color: var(--sc-ink); letter-spacing: -0.01em; }
.cx-tabs button small { font-size: 0.78rem; }
.cx-tabs button:hover { box-shadow: inset 0 0 0 1px color-mix(in oklab, var(--sc-ink) 30%, transparent); }
.cx-tabs button[aria-selected="true"] { background: color-mix(in oklab, var(--k-teal) 12%, var(--sc-surface)); box-shadow: inset 0 0 0 1.5px color-mix(in oklab, var(--k-teal) 70%, transparent), 0 10px 30px -18px color-mix(in oklab, var(--k-teal) 70%, transparent); color: var(--sc-ink); }
.cx-tabs button:focus-visible { outline: 2px solid var(--k-ti-hi); outline-offset: 2px; }
.cx { position: relative; display: grid; gap: var(--sc-6); padding: clamp(1rem, 2.5vw, 2rem); border-radius: 1.5rem;
  background: linear-gradient(180deg, color-mix(in oklab, var(--sc-surface) 72%, transparent), color-mix(in oklab, var(--sc-canvas) 80%, transparent)); }
.cx[hidden] { display: none; }
@media (min-width: 1000px) { .cx { grid-template-columns: minmax(0, 1.08fr) minmax(0, 0.92fr); align-items: start; } .cx__out { position: sticky; top: 6rem; } }
.cx__in { display: grid; gap: var(--sc-6); min-width: 0; }
.cx fieldset { border: 0; margin: 0; padding: 0; min-width: 0; display: grid; gap: var(--sc-4); }
.cx legend { display: flex; align-items: center; gap: var(--sc-3); width: 100%; padding: 0; margin-bottom: var(--sc-4); font-family: var(--sc-font-mono); font-size: var(--sc-t-xs); letter-spacing: 0.12em; text-transform: uppercase; color: var(--sc-ink-soft); }
.cx legend::after { content: ""; flex: 1; height: 1px; background: var(--sc-hairline); }
.cx__hint, .cx__fine { margin: 0; font-size: 0.78rem; line-height: 1.45; color: var(--sc-ink-soft); }
.cx__hint b { color: var(--sc-ink); font-weight: 600; }
/* task chips */
.cx__chips { display: flex; flex-wrap: wrap; gap: 0.5rem; }
.cx__chips label { position: relative; cursor: pointer; }
.cx__chips input, .cx__seg input { position: absolute; inset: 0; opacity: 0; margin: 0; cursor: pointer; }
.cx__chips span { display: inline-flex; align-items: center; gap: 0.5rem; padding: 0.6rem 0.95rem; border-radius: var(--sc-r-pill); font-size: var(--sc-t-sm); color: var(--sc-ink-soft);
  box-shadow: inset 0 0 0 1px var(--sc-hairline-strong); transition: background 180ms, color 180ms, box-shadow 180ms; }
.cx__chips i { font-style: normal; width: 1.1rem; text-align: center; opacity: 0.8; }
.cx__chips label:hover span { color: var(--sc-ink); }
.cx__chips input:checked + span { color: var(--sc-ink); background: color-mix(in oklab, var(--k-teal) 16%, transparent); box-shadow: inset 0 0 0 1.5px color-mix(in oklab, var(--k-teal) 65%, transparent); }
.cx__chips input:focus-visible + span, .cx__seg input:focus-visible + b { outline: 2px solid var(--k-ti-hi); outline-offset: 2px; }
/* fields */
.cx__nums, .cx__grid { grid-template-columns: repeat(auto-fit, minmax(min(100%, 12rem), 1fr)); }
.cx__f { display: grid; gap: 0.4rem; align-content: start; font-size: var(--sc-t-sm); }
.cx__f > span { display: flex; justify-content: space-between; align-items: baseline; gap: var(--sc-2); font-weight: 500; color: var(--sc-ink); }
.cx__num { display: flex; align-items: stretch; border-radius: 0.85rem; background: color-mix(in oklab, var(--sc-canvas) 62%, transparent); box-shadow: inset 0 0 0 1px var(--sc-hairline-strong); transition: box-shadow 200ms; }
.cx__num:focus-within { box-shadow: inset 0 0 0 1.5px var(--k-ti-hi), 0 0 0 4px color-mix(in oklab, var(--k-ti-hi) 10%, transparent); }
.cx__num input { flex: 1; min-width: 0; width: 100%; border: 0; background: none; color: var(--sc-ink); font-family: var(--sc-font-mono); font-size: 16px; text-align: right; padding: 0.72rem 0.3rem; -moz-appearance: textfield; }
.cx__num input:focus { outline: none; }
.cx__num input::-webkit-outer-spin-button, .cx__num input::-webkit-inner-spin-button { -webkit-appearance: none; margin: 0; }
.cx__unit { align-self: center; padding-right: 0.2rem; font-family: var(--sc-font-mono); font-size: 0.72rem; color: var(--sc-ink-soft); white-space: nowrap; }
.cx__step { flex: none; width: 2.5rem; border: 0; background: none; color: var(--sc-ink-soft); font-size: 1.1rem; cursor: pointer; border-radius: 0.85rem; touch-action: manipulation; }
.cx__step:hover { color: var(--sc-ink); background: color-mix(in oklab, var(--sc-ink) 6%, transparent); }
.cx__step:focus-visible { outline: 2px solid var(--k-ti-hi); outline-offset: -2px; }
.cx select { appearance: none; -webkit-appearance: none; width: 100%; padding: 0.72rem 2.2rem 0.72rem 0.9rem; border: 0; border-radius: 0.85rem; color: var(--sc-ink); font: inherit; font-size: var(--sc-t-sm);
  background: color-mix(in oklab, var(--sc-canvas) 62%, transparent) url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 12 8'%3E%3Cpath d='M1 1.5l5 5 5-5' fill='none' stroke='%23c3ccd6' stroke-width='1.5'/%3E%3C/svg%3E") no-repeat right 0.9rem center / 0.7rem;
  box-shadow: inset 0 0 0 1px var(--sc-hairline-strong); cursor: pointer; }
.cx select:focus-visible { outline: none; box-shadow: inset 0 0 0 1.5px var(--k-ti-hi); }
.cx select option { background: var(--sc-surface); color: var(--sc-ink); }
.cx__seg { grid-column: 1 / -1; display: flex; flex-wrap: wrap; align-items: center; gap: 0.4rem; }
.cx__seg > span { width: 8rem; font-size: var(--sc-t-sm); font-weight: 500; }
.cx__seg label { position: relative; cursor: pointer; }
.cx__seg b { display: inline-block; font-weight: 400; padding: 0.48rem 0.95rem; border-radius: var(--sc-r-pill); font-size: var(--sc-t-sm); color: var(--sc-ink-soft); box-shadow: inset 0 0 0 1px var(--sc-hairline-strong); transition: background 180ms, color 180ms; }
.cx__seg input:checked + b { color: var(--sc-ink); background: color-mix(in oklab, var(--k-teal) 16%, transparent); box-shadow: inset 0 0 0 1.5px color-mix(in oklab, var(--k-teal) 60%, transparent); }
.cx__wide { grid-column: 1 / -1; }
.cx__reset { padding: 0; border: 0; background: none; color: var(--k-teal); font: inherit; font-size: 0.74rem; text-decoration: underline; cursor: pointer; }
/* task rows (business case) */
.cx__thead, .cx__row { display: grid; grid-template-columns: minmax(0, 1fr) 8.6rem 8.6rem 5.4rem 2rem; gap: 0.5rem; align-items: center; }
.cx__thead { font-family: var(--sc-font-mono); font-size: 0.64rem; letter-spacing: 0.1em; text-transform: uppercase; color: var(--sc-ink-soft); }
.cx__rows { list-style: none; margin: 0; padding: 0; display: grid; gap: 0.5rem; }
.cx__row input[type="text"] { width: 100%; padding: 0.72rem 0.9rem; border: 0; border-radius: 0.85rem; background: color-mix(in oklab, var(--sc-canvas) 62%, transparent); box-shadow: inset 0 0 0 1px var(--sc-hairline-strong); color: var(--sc-ink); font: inherit; font-size: 16px; }
.cx__row input[type="text"]:focus { outline: none; box-shadow: inset 0 0 0 1.5px var(--k-ti-hi); }
.cx__row .cx__step { width: 1.9rem; }
.cx__row .cx__num input { text-align: center; padding-inline: 0; }
.cx__row .cx__unit { display: none; }
.cx__del { width: 2rem; height: 2rem; border: 0; border-radius: 50%; background: none; color: var(--sc-ink-soft); font-size: 1.2rem; cursor: pointer; }
.cx__del:hover { color: var(--k-warm); background: color-mix(in oklab, var(--k-warm) 12%, transparent); }
.cx__add select { width: auto; min-width: 14rem; background-color: transparent; box-shadow: inset 0 0 0 1px dashed var(--sc-hairline-strong); border: 1px dashed var(--sc-hairline-strong); }
/* result */
.cx__out { display: grid; gap: var(--sc-4); padding: clamp(1rem, 2.4vw, 1.75rem); border-radius: 1.25rem; overflow: clip;
  background: radial-gradient(28rem 16rem at 100% 0%, color-mix(in oklab, var(--k-teal) 13%, transparent), transparent 70%), color-mix(in oklab, var(--sc-canvas) 66%, transparent);
  box-shadow: inset 0 0 0 1px color-mix(in oklab, var(--k-teal) 22%, var(--sc-hairline)); }
.cx__k { margin: 0; font-family: var(--sc-font-mono); font-size: 0.66rem; letter-spacing: 0.12em; text-transform: uppercase; color: var(--sc-ink-soft); }
.cx__big { margin: 0; display: flex; align-items: baseline; gap: 0.5rem; flex-wrap: wrap; }
.cx__big > span { font-family: var(--sc-font-display); font-weight: 600; font-size: clamp(2.5rem, 1.6rem + 2.8vw, 3.8rem); line-height: 1; letter-spacing: -0.04em; font-variant-numeric: tabular-nums;
  background: linear-gradient(100deg, #ffffff, color-mix(in oklab, var(--k-teal) 60%, #ffffff)); -webkit-background-clip: text; background-clip: text; color: transparent; padding-bottom: 0.06em; }
.cx__big > span.neg { background: none; color: var(--k-warm); }
.cx__big small { font-size: var(--sc-t-sm); color: var(--sc-ink-soft); }
.cx__sub { margin: -0.4rem 0 0; font-size: var(--sc-t-sm); color: color-mix(in oklab, var(--sc-ink) 80%, var(--sc-canvas)); }
.cx__bars { display: grid; gap: 0.5rem; }
.cx__bars > div { display: grid; grid-template-columns: 3.2rem minmax(0, 1fr) 5.8rem; gap: var(--sc-3); align-items: center; font-size: var(--sc-t-xs); color: var(--sc-ink-soft); }
.cx__bars i { display: block; height: 0.7rem; border-radius: 1rem; background: color-mix(in oklab, var(--sc-ink) 7%, transparent); overflow: hidden; }
.cx__bars b { display: block; height: 100%; border-radius: inherit; transition: width 600ms var(--sc-ease-out); }
.cx__bars b.is-today { background: color-mix(in oklab, var(--k-warm) 75%, transparent); }
.cx__bars b.is-after { background: var(--k-teal); }
.cx__bars em { font-style: normal; text-align: right; font-family: var(--sc-font-mono); color: var(--sc-ink); font-variant-numeric: tabular-nums; }
.cx__day { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: var(--sc-2); }
.cx__daylabel { grid-column: 1 / -1; margin: 0; font-family: var(--sc-font-mono); font-size: 0.62rem; letter-spacing: 0.1em; text-transform: uppercase; color: var(--sc-ink-soft); }
.cx__day > div { padding: 0.6rem 0.75rem; border-radius: 0.8rem; background: color-mix(in oklab, var(--sc-ink) 4%, transparent); box-shadow: inset 0 0 0 1px var(--sc-hairline); display: grid; gap: 0.15rem; }
.cx__day span { font-size: var(--sc-t-xs); color: var(--sc-ink-soft); }
.cx__day b { font-family: var(--sc-font-display); font-weight: 600; font-size: 1.1rem; letter-spacing: -0.01em; font-variant-numeric: tabular-nums; white-space: nowrap; }
.cx__day .is-back { box-shadow: inset 0 0 0 1px color-mix(in oklab, var(--k-teal) 45%, transparent); }
.cx__day .is-back b { color: var(--k-teal); }
@media (max-width: 380px) { .cx__day b { font-size: 0.95rem; } }
.cx__table { width: 100%; border-collapse: collapse; font-variant-numeric: tabular-nums; font-size: var(--sc-t-sm); }
.cx__table th, .cx__table td { padding: 0.6rem 0.5rem; text-align: right; border-bottom: 1px solid var(--sc-hairline); white-space: nowrap; }
.cx__table thead th { font-family: var(--sc-font-mono); font-size: 0.64rem; font-weight: 400; letter-spacing: 0.1em; text-transform: uppercase; color: var(--sc-ink-soft); }
.cx__table tbody th { text-align: left; font-weight: 500; color: var(--sc-ink-soft); }
.cx__table td { font-family: var(--sc-font-mono); color: color-mix(in oklab, var(--sc-ink) 85%, var(--sc-canvas)); }
.cx__table td:last-child { color: var(--k-teal); font-weight: 600; }
.cx__table tbody tr:last-child th, .cx__table tbody tr:last-child td { border-bottom: 0; }
.cx__table tbody tr:last-child td:last-child { font-size: 1.02em; }
.cx__kpis { margin: 0; display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: var(--sc-3); }
.cx__kpis div { padding: 0.75rem 0.9rem; border-radius: 0.9rem; background: color-mix(in oklab, var(--sc-ink) 4%, transparent); box-shadow: inset 0 0 0 1px var(--sc-hairline); display: grid; gap: 0.25rem; }
.cx__kpis dt { font-family: var(--sc-font-mono); font-size: 0.62rem; letter-spacing: 0.1em; text-transform: uppercase; color: var(--sc-ink-soft); }
.cx__kpis dd { margin: 0; font-family: var(--sc-font-display); font-weight: 600; font-size: 1.2rem; letter-spacing: -0.02em; font-variant-numeric: tabular-nums; }
.cx__run { margin: 0; font-size: 0.78rem; color: var(--sc-ink-soft); } .cx__run b { color: var(--sc-ink); font-weight: 600; }
.cx__chart { margin: 0; display: grid; gap: var(--sc-2); }
.cx__chart figcaption { font-size: var(--sc-t-xs); color: var(--sc-ink-soft); }
.cx__plot { position: relative; height: 8.5rem; }
.cx__plot svg { width: 100%; height: 100%; display: block; overflow: visible; }
.cx__plot .zero { stroke: var(--sc-hairline-strong); stroke-width: 1; vector-effect: non-scaling-stroke; }
.cx__plot .bar { fill: var(--k-teal); pointer-events: none; transition: opacity 150ms; }
.cx__plot .bar.neg { fill: color-mix(in oklab, var(--sc-ink-soft) 50%, transparent); }
.cx__plot .bar.on { opacity: 0.75; }
.cx__plot .hit { fill: transparent; }
.cx__tip { position: absolute; z-index: 2; transform: translate(-50%, calc(-100% - 8px)); padding: 0.35rem 0.6rem; border-radius: 0.5rem; background: var(--sc-surface); box-shadow: var(--k-float); font-size: 0.75rem; white-space: nowrap; pointer-events: none; }
.cx__years { display: grid; grid-auto-flow: column; grid-auto-columns: 1fr; font-family: var(--sc-font-mono); font-size: 0.62rem; color: var(--sc-ink-soft); text-align: center; }
.cx__actions { display: flex; flex-wrap: wrap; gap: var(--sc-3); }
.cx__actions .btn { border: 0; cursor: pointer; font: inherit; font-size: var(--sc-t-sm); font-weight: 500; }
/* phones */
.cx-dock { position: fixed; z-index: calc(var(--sc-z-chrome) - 1); left: var(--sc-gutter); right: calc(var(--sc-gutter) + 3.6rem); bottom: calc(max(1rem, env(safe-area-inset-bottom, 0px)));
  display: none; align-items: center; justify-content: space-between; gap: var(--sc-3); padding: 0.55rem 0.55rem 0.55rem 1rem; border-radius: 1rem;
  background: color-mix(in oklab, var(--sc-surface) 84%, transparent); backdrop-filter: blur(16px) saturate(1.2); -webkit-backdrop-filter: blur(16px) saturate(1.2); box-shadow: var(--k-float);
  opacity: 0; translate: 0 1rem; pointer-events: none; transition: opacity 260ms var(--sc-ease-out), translate 260ms var(--sc-ease-out); }
.cx-dock > span { display: grid; line-height: 1.15; min-width: 0; }
.cx-dock small { font-family: var(--sc-font-mono); font-size: 0.6rem; letter-spacing: 0.1em; text-transform: uppercase; color: var(--sc-ink-soft); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.cx-dock b { font-family: var(--sc-font-display); font-weight: 600; font-size: 1.3rem; letter-spacing: -0.02em; font-variant-numeric: tabular-nums; }
.cx-dock button { flex: none; border: 0; cursor: pointer; padding: 0.55rem 0.85rem; border-radius: var(--sc-r-pill); font: inherit; font-size: 0.8rem; font-weight: 600; color: var(--sc-accent-ink); background: linear-gradient(160deg, var(--k-ti-hi), var(--k-ti-lo)); }
@media (max-width: 999px) { .cx-dock { display: flex; } .cx-dock.is-on { opacity: 1; translate: 0 0; pointer-events: auto; } }
@media (max-width: 700px) {
  .cx__thead { display: none; }
  .cx__row { grid-template-columns: repeat(3, minmax(0, 1fr)) 2rem; padding: 0.7rem; border-radius: 1rem; box-shadow: inset 0 0 0 1px var(--sc-hairline); }
  .cx__row > label:first-child { grid-column: 1 / 4; }
  .cx__row > .cx__del { grid-column: 4; grid-row: 1; }
  .cx__row > label:nth-child(2), .cx__row > label:nth-child(3), .cx__row > label:nth-child(4) { grid-row: 2; }
  .cx__row > label:nth-child(4) { grid-column: 3 / 5; }
  .cx__row > label:nth-child(2)::before { content: "Items a day"; } .cx__row > label:nth-child(3)::before { content: "Minutes each"; } .cx__row > label:nth-child(4)::before { content: "Automated"; }
  .cx__row > label::before { display: block; margin-bottom: 0.3rem; font-family: var(--sc-font-mono); font-size: 0.58rem; letter-spacing: 0.08em; text-transform: uppercase; color: var(--sc-ink-soft); }
  .cx__row .cx__step { width: 1.7rem; }
}
@media (max-width: 560px) {
  .cx-tabs { gap: 0.5rem; } .cx-tabs button { padding: 0.7rem 0.8rem; } .cx-tabs button b { font-size: 0.92rem; } .cx-tabs button small { font-size: 0.7rem; }
  .cx { padding: 0.9rem; border-radius: 1.25rem; }
  .cx__chips span { padding: 0.5rem 0.75rem; font-size: 0.8rem; }
  .cx__nums { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: var(--sc-3); }
  .cx__nums .cx__f:last-child { grid-column: 1 / -1; }
  .cx__grid { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: var(--sc-3); }
  .cx__seg > span { width: 100%; }
  .cx__step { width: 2.1rem; }
  .cx__out { padding: 1rem; }
  .cx__table th, .cx__table td { padding: 0.55rem 0.3rem; font-size: 0.8rem; }
  .cx__bars > div { grid-template-columns: 2.8rem minmax(0, 1fr) 5.2rem; }
  .cx__add select { width: 100%; }
}

/* ======================================================== v16 · type -- */
/* Space Grotesk for headings and numbers (engineered, technical), Inter for text, Geist Mono for labels. */
:root {
  --sc-font-display: "Space Grotesk", "Inter", system-ui, -apple-system, "Segoe UI", sans-serif;
  --sc-font-text: "Inter", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  --k-head: #f6f8fa;
  --k-em-a: #7ff0dc;
  --k-em-b: #5cc8ff;
}
body { font-feature-settings: "cv11", "ss01"; }
h1, h2, h3, .statement, .tile__k, .kc__v { color: var(--k-head); }
.chapter h1, .page-hero h1, .chapter h2, .statement, .tour__copy h2 { font-weight: 600; }
.chapter h1, .page-hero h1 { letter-spacing: -0.035em; line-height: 1.02; }
.chapter h2, .statement, .tour__copy h2 { letter-spacing: -0.03em; line-height: 1.06; }
.rules-card h3, .book__done h2, .book__side h2, .legal h2, .tile__k { font-weight: 600; letter-spacing: -0.02em; }
.cx__num input { min-width: 3.2em; }
@media (max-width: 560px) { .cx__grid .cx__unit { display: none; } }
@media (min-width: 561px) {
  .chapter h1 { font-size: clamp(2.6rem, 1rem + 3.5vw, 4.5rem); max-width: 13ch; }
  .chapter h2 { font-size: clamp(2.1rem, 1.1rem + 2.5vw, 3.5rem); }
  .statement { font-size: clamp(2.1rem, 1.1rem + 2.5vw, 3.5rem); }
  .page-hero h1 { font-size: clamp(2.4rem, 1.1rem + 3.4vw, 4.4rem); }
}
/* emphasis: a clear teal-to-cyan signal colour, never grey */
.em, .page-index #start .chapter__copy h1 .em { font-style: normal; background-image: linear-gradient(100deg, var(--k-em-a) 0%, var(--k-em-b) 100%); -webkit-background-clip: text; background-clip: text; color: transparent; }
/* a text-shadow shows through clipped (transparent) text and turned the accent grey: use a drop-shadow instead */
.em { text-shadow: none; filter: drop-shadow(0 1px 14px rgb(0 0 0 / .45)); }
@media (forced-colors: active) { .em { color: CanvasText; background: none; } }
@media (max-width: 560px) { .chapter h1 { max-width: none; } }

/* ============================================ v17 · clearer story boxes -- */
/* Before / After is a two-way switch that says what it compares: today, by hand (amber)
   and with automation (teal). A sliding highlight shows which one is on. */
.state-wrap { display: grid; gap: 0.45rem; justify-items: start; }
.state-wrap .state { position: relative; display: inline-grid; grid-auto-flow: column; grid-auto-columns: 1fr; gap: 0; padding: 0.3rem; border-radius: var(--sc-r-pill); width: max-content; cursor: default; }
.state-wrap .state::before { content: ""; position: absolute; top: 0.3rem; bottom: 0.3rem; left: 0.3rem; width: calc(50% - 0.3rem); border-radius: var(--sc-r-pill);
  background: color-mix(in oklab, var(--k-amber) 20%, transparent); box-shadow: inset 0 0 0 1px color-mix(in oklab, var(--k-amber) 55%, transparent);
  transition: translate 450ms var(--sc-ease-out), background 450ms var(--sc-ease-out), box-shadow 450ms var(--sc-ease-out); }
.is-after .state-wrap .state::before { translate: 100% 0; background: color-mix(in oklab, var(--k-teal) 18%, transparent); box-shadow: inset 0 0 0 1px color-mix(in oklab, var(--k-teal) 55%, transparent); }
.state-wrap .state > button[data-go] { position: relative; z-index: 1; display: inline-flex; align-items: center; justify-content: center; gap: 0.5rem; min-height: 2.6rem; padding: 0.5rem 1.05rem;
  font-family: var(--sc-font-text); font-size: var(--sc-t-sm); font-weight: 500; letter-spacing: 0; text-transform: none; white-space: nowrap; background: none; color: var(--sc-ink-soft); border-radius: var(--sc-r-pill); }
.state-wrap .state > button[aria-pressed="true"] { color: var(--sc-ink); background: none; }
.state-wrap .state > button[data-go]:hover { color: var(--sc-ink); }
.state-wrap .state > button i { width: 0.5rem; height: 0.5rem; border-radius: 50%; flex: none; }
.state-wrap .state > button[data-go="before"] i { background: var(--k-amber); }
.state-wrap .state > button[data-go="after"] i { background: var(--k-teal); }
.state__hint { margin: 0; padding-left: 1rem; font-size: var(--sc-t-xs); color: var(--sc-ink-soft); }
.state__hint-m { display: none; }
@media (max-width: 960px), (hover: none) { .state__hint-d { display: none; } .state__hint-m { display: inline; } }
@media (max-width: 560px) {
  .state-wrap, .state-wrap .state { width: 100%; }
  .state-wrap .state > button[data-go] { padding-inline: 0.6rem; font-size: 0.82rem; }
}

/* The example box: says what the example is, what is happening now, and how long it takes. */
.demo__head { display: grid; gap: 0.15rem; padding: 0.75rem 0.95rem 0.7rem; border-bottom: 1px solid var(--sc-hairline); }
.demo__k { font-family: var(--sc-font-mono); font-size: 0.6rem; letter-spacing: 0.14em; text-transform: uppercase; color: var(--sc-ink-soft); }
.demo__head b { font-family: var(--sc-font-display); font-weight: 600; font-size: 1.02rem; letter-spacing: -0.01em; line-height: 1.2; color: var(--k-head, var(--sc-ink)); }
.demo__mode { margin: 0.75rem 0.95rem 0; display: grid; font-size: 0.8rem; font-weight: 500; line-height: 1.35; }
.demo__mode span { grid-area: 1 / 1; display: flex; align-items: center; gap: 0.5rem; transition: opacity 400ms var(--sc-ease-out); }
.demo__mode i { width: 0.5rem; height: 0.5rem; border-radius: 50%; flex: none; }
.demo__mode .b4 { color: var(--k-amber); } .demo__mode .b4 i { background: var(--k-amber); }
.demo__mode .af { color: var(--k-teal); opacity: 0; } .demo__mode .af i { background: var(--k-teal); }
.is-after .demo__mode .b4 { opacity: 0; } .is-after .demo__mode .af { opacity: 1; }
.demo .mail { margin-top: 0.65rem; }
.demo .mail p { font-size: 0.86rem; }
.demo .form { gap: 0.35rem; padding-top: 0.65rem; }
.demo .form > div { grid-template-columns: 6.4rem minmax(0, 1fr); }
.demo__foot { margin: 0.65rem 0.95rem 0; padding: 0.6rem 0 0.55rem; border-top: 1px solid var(--sc-hairline); font-family: var(--sc-font-text); font-size: 0.82rem; font-weight: 500; letter-spacing: 0; }
.demo__foot .b4 { color: var(--sc-ink); } .demo__foot .af { color: var(--k-teal); }
.demo__foot span::before { content: "⏱ "; }
.demo__key { margin: 0; padding: 0 0.95rem 0.75rem; display: flex; flex-wrap: wrap; gap: 0.35rem 1rem; font-size: 0.7rem; color: var(--sc-ink-soft); opacity: 0; transition: opacity 400ms var(--sc-ease-out) 500ms; }
.demo__key span { display: inline-flex; align-items: center; gap: 0.4rem; }
.demo__key i { width: 0.55rem; height: 0.55rem; border-radius: 0.15rem; }
.demo__key .t { background: color-mix(in oklab, var(--k-teal) 40%, transparent); box-shadow: inset 0 0 0 1px var(--k-teal); }
.demo__key .a { background: color-mix(in oklab, var(--k-amber) 40%, transparent); box-shadow: inset 0 0 0 1px var(--k-amber); }
.is-after .demo__key { opacity: 1; }
/* invoices: name and amount, the status on its own line */
.demo .rows { padding-top: 0.35rem; }
.demo .rows li { grid-template-columns: minmax(0, 1fr) auto; row-gap: 0.1rem; padding: 0.45rem 0; }
.demo .rows span { font-family: var(--sc-font-text); font-size: 0.82rem; }
.demo .rows span:nth-child(2) { font-family: var(--sc-font-mono); font-size: 0.76rem; }
.demo .rows em { grid-column: 1 / -1; font-size: 0; }
.demo .rows em::before { content: "Waiting to be checked by hand"; font-size: 0.74rem; color: var(--sc-ink-soft); }
.is-after .demo .rows em::before { content: "✓ " attr(data-ok); color: var(--k-teal); }
.is-after .demo .rows .flag em::before { content: "! " attr(data-ok); color: var(--k-amber); }
/* report: grey until it is built, then teal with the unusual figures in amber */
.flow__k { margin: 0.75rem 0.95rem 0; font-size: 0.72rem; color: var(--sc-ink-soft); }
.demo .flow { padding-top: 0.4rem; }
.demo .report { margin: 0.9rem 0.95rem 0; }
.demo .bars { height: 4.2rem; }
.demo .bars i, .demo .bars i.hi { background: color-mix(in oklab, var(--sc-ink) 16%, transparent); transition: transform 700ms var(--sc-ease-out), background 500ms var(--sc-ease-out); }
.is-after .demo .bars i { background: color-mix(in oklab, var(--k-teal) 55%, transparent); }
.is-after .demo .bars i.hi { background: var(--k-amber); }
.demo .report p .af { display: none; }
.is-after .demo .report p .af { display: inline; } .is-after .demo .report p .b4 { display: none; }
.demo .report p .b4 { color: var(--sc-ink-soft); font-weight: 500; }
@media (max-width: 960px) { .demo__head { display: grid; } }

/* The chapter menu shared the .rail class with an old horizontal section and picked up its side padding,
   which pulled it onto the example box. */
nav.rail { padding-inline: 0; gap: 0; }
/* Desktop: the box keeps clear of the chapter menu on the right, and steps aside while you use it. */
@media (min-width: 961px) { .demo { width: min(23.5rem, 31vw); } }
@media (min-width: 1100px) and (hover: hover) {
  .demo { right: max(var(--sc-gutter), 5.25rem); }
  #any-firm .demo { width: min(30rem, 33vw); }
  .chapter.is-live .demo { transition: opacity 300ms var(--sc-ease-out), translate 500ms var(--sc-ease-out); }
  body:has(.rail:hover) .chapter.is-live .demo, body:has(.rail a:focus-visible) .chapter.is-live .demo { opacity: 0.08; }
  .rail a span { background: color-mix(in oklab, var(--sc-canvas) 82%, transparent); }
}
.demo .rows li:nth-child(4) { display: grid; }

/* v18: the cursor light at 70% of its old size (46rem -> 32.2rem). */
.glow { width: 32.2rem; height: 32.2rem; margin: -16.1rem 0 0 -16.1rem; }

/* v26: "Ops" with a teal gear as the O. */
.brand__ops, .site-foot__id div .brand__ops { display: inline; color: var(--k-teal); font: inherit; white-space: nowrap; }
svg.brand__gear { display: inline-block; width: 0.8em; height: 0.8em; vertical-align: -0.06em; margin: 0 0.02em 0 0.03em; }