/* ============================================================================
   SPEAKRITE: page-local theme and composition.
   ========================================================================== */

@font-face {
  font-family: "Archivo";
  src: url("assets/fonts/archivo-latin.woff2") format("woff2");
  font-weight: 100 900;
  font-stretch: 62% 125%;
  font-style: normal;
  font-display: swap;
}

@font-face {
  font-family: "Geist";
  src: url("assets/fonts/geist-latin.woff2") format("woff2");
  font-weight: 100 900;
  font-style: normal;
  font-display: swap;
}

:root {
  --sc-canvas: #0B0F0E;
  --sc-surface: #141A19;
  --sc-ink: #F2E8D5;
  --sc-ink-soft: #8A9A8A;
  --sc-accent: #F59E0B; /* Filament Amber */
  --sc-accent-ink: #0B0F0E;

  --sc-font-display: "Archivo", "Arial Narrow", system-ui, sans-serif;
  --sc-font-text: "Geist", system-ui, -apple-system, "Segoe UI", sans-serif;
  --sc-font-mono: "Geist", ui-monospace, monospace;

  --sc-hairline: color-mix(in oklab, var(--sc-ink) 14%, transparent);
  --sc-hairline-strong: color-mix(in oklab, var(--sc-ink) 28%, transparent);
}

body {
  background: var(--sc-canvas);
  color: var(--sc-ink);
  font-weight: 400;
}

.sc-display {
  font-weight: 700;
  font-stretch: 78%;
}

.label {
  font-family: var(--sc-font-text);
  font-size: var(--sc-t-xs);
  font-weight: 500;
  letter-spacing: 0.14em;
  line-height: 1.4;
  text-transform: uppercase;
  color: var(--sc-ink-soft);
  margin: 0;
}

.skip {
  position: fixed;
  left: var(--sc-gutter);
  top: var(--sc-2);
  z-index: 100;
  transform: translateY(-160%);
  background: var(--sc-accent);
  color: var(--sc-accent-ink);
  padding: var(--sc-2) var(--sc-4);
  font-size: var(--sc-t-sm);
  font-weight: 600;
  text-decoration: none;
  border-radius: var(--sc-r-sm);
}
.skip:focus { transform: none; }

/* hero */
.hero { position: relative; }
.hero__stage {
  display: grid;
  grid-template-rows: auto 1fr auto;
  padding: clamp(1.15rem, 3vw, 2.5rem) var(--sc-gutter) clamp(2rem, 7vh, 5rem);
}
.hero__ghost {
  position: absolute;
  right: -2vw;
  top: 9vh;
  z-index: 0;
  font-family: var(--sc-font-display);
  font-size: clamp(7rem, 18vw, 16rem);
  font-weight: 800;
  font-stretch: 70%;
  line-height: 0.72;
  letter-spacing: -0.06em;
  color: transparent;
  -webkit-text-stroke: 1px var(--sc-hairline-strong);
  opacity: 0.38;
  transform: translate3d(0, calc(var(--sc-p, 0) * -3vh), 0) scale(calc(1.04 - var(--sc-p, 0) * 0.08));
  pointer-events: none;
  user-select: none;
}
.hero__meta {
  position: relative;
  z-index: 2;
  display: flex;
  justify-content: space-between;
  font-family: var(--sc-font-text);
  font-size: 0.68rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--sc-ink-soft);
}
.hero__copy {
  position: relative;
  z-index: 2;
  display: grid;
  gap: clamp(0.7rem, 1.8vh, 1.35rem);
  align-content: end;
  max-width: 74rem;
}
.hero__kicker {
  margin: 0;
  color: var(--sc-accent);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}
.hero__title {
  font-family: var(--sc-font-display);
  font-size: clamp(3rem, 10vw, 8rem);
  font-weight: 800;
  line-height: 0.86;
  letter-spacing: -0.06em;
  text-transform: uppercase;
  margin: 0;
}
.hero__title em { font-style: normal; color: var(--sc-accent); }
.hero__sub {
  max-width: 34ch;
  color: var(--sc-ink-soft);
  font-size: var(--sc-t-lg);
}

/* problem */
.problem { padding-block: clamp(3.5rem, 7vw, 7rem) clamp(6rem, 14vw, 14rem); }
.problem__top { display: grid; gap: var(--sc-3); padding-top: var(--sc-4); border-top: 1px solid var(--sc-hairline); }
.problem__line {
  max-width: 22ch;
  margin: 0;
  font-family: var(--sc-font-display);
  font-size: clamp(1.9rem, 4.6vw, 4.6rem);
  font-weight: 700;
  line-height: 0.96;
  letter-spacing: -0.04em;
}

/* turn */
.turn { padding-block: clamp(4rem, 10vw, 10rem); }
.turn__inner { display: grid; gap: clamp(2.5rem, 5vw, 4.5rem); }
.turn__wipe { padding: 0.1em var(--sc-gutter) 0.18em; }
.turn__big {
  margin: 0;
  font-family: var(--sc-font-display);
  font-size: clamp(4rem, 14vw, 11rem);
  font-weight: 800;
  line-height: 0.82;
  letter-spacing: -0.06em;
  text-transform: uppercase;
}
.turn__big span { color: var(--sc-accent); }
.turn__copy { display: grid; gap: var(--sc-3); max-width: 48rem; }

.steps {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: clamp(1.5rem, 4vw, 2.5rem);
}
.step { display: grid; gap: 0.5rem; }
.step__num {
  margin: 0;
  color: var(--sc-accent);
  font-family: var(--sc-font-text);
  font-size: 0.8rem;
  letter-spacing: 0.14em;
}
.step__title {
  margin: 0;
  font-family: var(--sc-font-display);
  font-size: clamp(1.5rem, 2.5vw, 2.2rem);
}
.step__body { margin: 0; color: var(--sc-ink-soft); }

/* transform */
.transform { position: relative; }
.transform__stage {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1.2fr);
  gap: clamp(1rem, 4vw, 4rem);
  align-items: center;
  padding: clamp(2rem, 5vw, 4rem) var(--sc-gutter);
}
.transform__title {
  max-width: 15ch;
  margin: 0;
  font-family: var(--sc-font-display);
  font-size: clamp(2rem, 4.4vw, 4.4rem);
  font-weight: 700;
}
.transform__body { max-width: 34ch; margin: 0; color: var(--sc-ink-soft); }

.waveform { width: 100%; height: auto; overflow: visible; }
.waveform__path {
  fill: none;
  stroke: var(--sc-accent);
  stroke-width: 3;
  stroke-linecap: round;
  stroke-dasharray: 1000;
  stroke-dashoffset: calc(1000 - var(--sc-p, 0) * 1500);
  opacity: calc(1 - var(--sc-p, 0));
}
.doclines__line {
  fill: none;
  stroke: var(--sc-ink);
  stroke-width: 4;
  stroke-linecap: round;
  stroke-dasharray: 600;
  stroke-dashoffset: calc(600 - var(--sc-p, 0) * 600);
}
.doclines { opacity: calc(var(--sc-p, 0) * 1.5 - 0.5); }

/* paper */
.ground-light {
  --sc-canvas: #FDFCF8;
  --sc-surface: #F5F2E9;
  --sc-ink: #0B0F0E;
  --sc-ink-soft: #5A665A;
  --sc-accent: #D97706;
  --sc-accent-ink: #FDFCF8;
  --sc-hairline: color-mix(in oklab, var(--sc-ink) 14%, transparent);
  --sc-hairline-strong: color-mix(in oklab, var(--sc-ink) 26%, transparent);
  color: var(--sc-ink);
  background: var(--sc-canvas);
}
.transform.is-light {
  --sc-canvas: #FDFCF8;
  --sc-ink: #0B0F0E;
  --sc-ink-soft: #5A665A;
  --sc-accent: #D97706;
  background: var(--sc-canvas);
}
.paper { padding-block: clamp(3rem, 6vw, 6rem) clamp(5rem, 11vw, 12rem); }
.paper__inner { display: grid; gap: clamp(2.5rem, 6vw, 5rem); }
.screens {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: clamp(1.5rem, 4vw, 2.5rem);
}
.screen { margin: 0; }
.screen__link { display: block; border-radius: var(--sc-r-md); }
.screen__link:focus-visible { outline: 3px solid var(--sc-accent); outline-offset: 4px; }
.screen__img {
  display: block;
  width: 100%;
  height: auto;
  border: 1px solid var(--sc-hairline);
  border-radius: var(--sc-r-md);
  box-shadow: 0 20px 40px -20px rgba(11, 15, 14, 0.25);
  background: var(--sc-surface);
}
.screen__placeholder {
  width: 100%;
  aspect-ratio: 9 / 16;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 1.5rem;
  border: 1px solid var(--sc-hairline);
  border-radius: var(--sc-r-md);
  background: color-mix(in oklab, var(--sc-surface) 40%, transparent);
  box-shadow: 0 20px 40px -20px rgba(11, 15, 14, 0.25);
}
.screen__placeholder-label {
  font-family: var(--sc-font-text);
  font-size: 0.8rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--sc-ink-soft);
}
.screen__cap {
  margin-top: 0.8rem;
  text-align: center;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  font-size: 0.7rem;
  color: var(--sc-ink-soft);
}
.screen__tap { margin: 0.5rem 0 0; color: var(--sc-ink-soft); font-size: 0.85rem; }

.promises { margin-top: clamp(1rem, 3vw, 2rem); }
.promise {
  padding: clamp(1.5rem, 4vw, 2.5rem);
  border: 1px solid var(--sc-hairline);
  border-radius: var(--sc-r-lg);
  background: color-mix(in oklab, var(--sc-surface) 60%, transparent);
}
.promise__title {
  margin: 0 0 1rem;
  font-family: var(--sc-font-display);
  font-size: clamp(1.3rem, 2vw, 1.8rem);
}
.promise__list {
  margin: 0;
  padding-left: 1.2rem;
  display: grid;
  gap: 0.8rem;
}
.promise__list li { color: var(--sc-ink); }

/* close */
.close {
  --sc-canvas: #FDFCF8;
  --sc-ink: #0B0F0E;
  --sc-ink-soft: #5A665A;
  background: var(--sc-canvas);
  color: var(--sc-ink);
}
.close__stage {
  display: grid;
  grid-template-rows: 1fr auto;
  min-height: min(80svh, 40rem);
  padding: clamp(1.5rem, 4vw, 3rem) var(--sc-gutter) clamp(1.5rem, 3vw, 2.5rem);
}
.close__horizon {
  position: absolute;
  top: 48%;
  left: var(--sc-gutter);
  right: var(--sc-gutter);
  height: 1px;
  background: color-mix(in oklab, var(--sc-ink) 18%, transparent);
}
.close__horizon span {
  position: absolute;
  right: 0;
  top: -4px;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--sc-accent);
}
.close__inner {
  align-self: end;
  display: grid;
  gap: var(--sc-3);
  max-width: 36rem;
  padding-top: clamp(3rem, 10vh, 6rem);
  padding-bottom: clamp(2rem, 8vh, 5rem);
}
.close__title {
  margin: 0;
  font-family: var(--sc-font-display);
  font-size: clamp(1.6rem, 2.6vw, 2.4rem);
  font-weight: 700;
}
.close__cta {
  width: fit-content;
  color: var(--sc-ink);
  text-decoration-color: var(--sc-accent);
  text-underline-offset: 0.25em;
}
.close__small { margin: 0; color: var(--sc-ink-soft); }
.foot {
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--sc-3);
  padding-top: var(--sc-3);
  border-top: 1px solid color-mix(in oklab, var(--sc-ink) 18%, transparent);
  font-size: 0.62rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--sc-ink-soft);
}
.foot p { margin: 0; }
.foot a { color: inherit; }

@media (max-width: 860px) {
  .hero__ghost { font-size: 28vw; top: 12vh; }
  .hero__title { font-size: clamp(2.8rem, 12vw, 5rem); }
  .transform__stage { grid-template-columns: 1fr; align-content: center; gap: 2.5rem; }
  .waveform { width: 100%; }
  .screens { grid-template-columns: 1fr; }
  .paper { padding-bottom: 3rem; }
}

@media (max-width: 420px) {
  .hero__title { font-size: clamp(2.6rem, 13vw, 4rem); }
  .problem__line { font-size: clamp(1.8rem, 8vw, 2.6rem); }
  .turn__big { font-size: clamp(3rem, 16vw, 5rem); }
}

@media (prefers-reduced-motion: reduce) {
  .hero__ghost { transform: none !important; }
  .waveform__path, .doclines__line { stroke-dashoffset: 0 !important; transition: none !important; }
}