/* ============================================================
   YMT — Yushi Marketing Technology
   Core design system: tokens, glass surfaces, motion primitives
   ============================================================ */

/* ---------- Reset ---------- */
*, *::before, *::after { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
img, video, canvas, svg { display: block; max-width: 100%; }
button, input, textarea, select { font: inherit; color: inherit; }
a { color: inherit; text-decoration: none; }
h1, h2, h3, h4, p, figure, ul { margin: 0; }
ul { padding: 0; list-style: none; }

/* ---------- Tokens ---------- */
:root {
  /* Base — deep space navy pulled from the logo wordmark */
  --ink-900: #04060d;
  --ink-800: #070b16;
  --ink-700: #0c1122;
  --ink-600: #131a2f;

  --paper:   #f4f6fb;
  --mist:    rgba(244, 246, 251, 0.72);
  --whisper: rgba(244, 246, 251, 0.46);
  --faint:   rgba(244, 246, 251, 0.16);

  /* Logo mosaic */
  --violet: #7c5cff;
  --indigo: #3b5cf6;
  --sky:    #22c8f5;
  --aqua:   #6fe3d4;
  --emerald:#2fbf6e;
  --lime:   #b6e02a;
  --gold:   #ffd21e;
  --crimson:#e01b34;
  --magenta:#ff2d6f;

  /* Per-page accent — overridden per section theme */
  --accent-a: var(--violet);
  --accent-b: var(--sky);
  --accent-glow: rgba(124, 92, 255, 0.42);

  /* Glass */
  --glass-bg:     rgba(255, 255, 255, 0.045);
  --glass-bg-hi:  rgba(255, 255, 255, 0.085);
  --glass-line:   rgba(255, 255, 255, 0.11);
  --glass-line-hi:rgba(255, 255, 255, 0.22);
  --glass-blur:   blur(28px) saturate(165%);
  --glass-shadow: 0 24px 60px -18px rgba(0, 0, 0, 0.75),
                  inset 0 1px 0 0 rgba(255, 255, 255, 0.09);

  /* Type */
  --font-display: "Space Grotesk", "Inter", ui-sans-serif, system-ui, -apple-system, "Segoe UI", sans-serif;
  --font-body: "Inter", ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  --font-mono: "JetBrains Mono", ui-monospace, "SF Mono", Menlo, monospace;

  /* Rhythm */
  --pad-x: clamp(1.25rem, 5vw, 6rem);
  --shell: 1240px;
  --r-sm: 12px;
  --r-md: 20px;
  --r-lg: 28px;
  --r-xl: 40px;

  /* Motion */
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --ease-io:  cubic-bezier(0.65, 0, 0.35, 1);
}

/* ---------- Page shell ---------- */
body {
  background: var(--ink-900);
  color: var(--paper);
  font-family: var(--font-body);
  font-size: clamp(1rem, 0.95rem + 0.2vw, 1.075rem);
  line-height: 1.65;
  letter-spacing: -0.006em;
  overflow-x: clip;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

/* Ambient light field — fixed behind everything */
.ambient {
  position: fixed;
  inset: -20vmax;
  z-index: 0;
  pointer-events: none;
  filter: blur(90px);
  opacity: 0.55;
}
.ambient span {
  position: absolute;
  border-radius: 50%;
  mix-blend-mode: screen;
  will-change: transform;
}
.ambient span:nth-child(1) {
  width: 46vmax; height: 46vmax; top: 4%; left: -4%;
  background: radial-gradient(circle at 35% 35%, var(--accent-a), transparent 68%);
  animation: drift-a 26s var(--ease-io) infinite alternate;
}
.ambient span:nth-child(2) {
  width: 38vmax; height: 38vmax; top: 42%; right: -6%;
  background: radial-gradient(circle at 60% 40%, var(--accent-b), transparent 68%);
  animation: drift-b 32s var(--ease-io) infinite alternate;
}
.ambient span:nth-child(3) {
  width: 30vmax; height: 30vmax; bottom: -6%; left: 34%;
  background: radial-gradient(circle at 50% 50%, var(--magenta), transparent 70%);
  animation: drift-c 38s var(--ease-io) infinite alternate;
  opacity: 0.55;
}
@keyframes drift-a { to { transform: translate3d(14vw, 10vh, 0) scale(1.18); } }
@keyframes drift-b { to { transform: translate3d(-12vw, -12vh, 0) scale(0.86); } }
@keyframes drift-c { to { transform: translate3d(8vw, -16vh, 0) scale(1.24); } }

/* Film grain + scanline texture over the whole page */
.grain {
  position: fixed;
  inset: 0;
  z-index: 1;
  pointer-events: none;
  opacity: 0.5;
  background-image:
    repeating-linear-gradient(0deg, rgba(255,255,255,0.014) 0 1px, transparent 1px 3px),
    url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='140' height='140'><filter id='n'><feTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='3'/><feColorMatrix type='saturate' values='0'/></filter><rect width='140' height='140' filter='url(%23n)' opacity='0.28'/></svg>");
}

main { position: relative; z-index: 2; }

/* ---------- Layout helpers ---------- */
.shell {
  width: 100%;
  max-width: var(--shell);
  margin-inline: auto;
  padding-inline: var(--pad-x);
}
.shell-wide { max-width: 1560px; }

section { position: relative; }

.stack   { display: flex; flex-direction: column; }
.gap-xs  { gap: 0.6rem; }  .gap-sm { gap: 1rem; }
.gap-md  { gap: 1.75rem; } .gap-lg { gap: 3rem; }

/* ---------- Type scale ---------- */
.eyebrow {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.28em;
  text-transform: uppercase;
  color: var(--whisper);
  display: inline-flex;
  align-items: center;
  gap: 0.7rem;
}
.eyebrow::before {
  content: "";
  width: 26px; height: 1px;
  background: linear-gradient(90deg, var(--accent-a), transparent);
}

.display {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(2.6rem, 1.2rem + 6.2vw, 6.4rem);
  line-height: 0.94;
  letter-spacing: -0.045em;
}
.h1 {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(2.1rem, 1.1rem + 3.6vw, 4.1rem);
  line-height: 1.04;
  letter-spacing: -0.035em;
}
.h2 {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: clamp(1.45rem, 1.1rem + 1.5vw, 2.2rem);
  line-height: 1.18;
  letter-spacing: -0.025em;
}
.h3 {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1.14rem;
  letter-spacing: -0.015em;
}
.lede {
  font-size: clamp(1.05rem, 0.98rem + 0.45vw, 1.3rem);
  line-height: 1.6;
  color: var(--mist);
  max-width: 62ch;
}
.body-dim { color: var(--mist); }
.small { font-size: 0.9rem; color: var(--whisper); }
.mono { font-family: var(--font-mono); font-size: 0.78rem; letter-spacing: 0.1em; }

.grad-text {
  background: linear-gradient(104deg, var(--accent-a), var(--accent-b) 58%, var(--paper));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

/* ---------- Glass surfaces ---------- */
.glass {
  position: relative;
  background: var(--glass-bg);
  border: 1px solid var(--glass-line);
  border-radius: var(--r-lg);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  box-shadow: var(--glass-shadow);
  overflow: hidden;
}
/* Specular sheen along the top edge */
.glass::before {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: inherit;
  padding: 1px;
  background: linear-gradient(150deg, rgba(255,255,255,0.34), rgba(255,255,255,0) 42%);
  -webkit-mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
  -webkit-mask-composite: xor;
  mask-composite: exclude;
  pointer-events: none;
}
.glass-soft { border-radius: var(--r-md); --glass-blur: blur(18px) saturate(150%); }

/* ---------- Buttons ---------- */
.btn {
  --btn-pad: 0.85rem 1.6rem;
  position: relative;
  display: inline-flex;
  align-items: center;
  gap: 0.65rem;
  padding: var(--btn-pad);
  border-radius: 999px;
  border: 1px solid var(--glass-line-hi);
  background: var(--glass-bg-hi);
  backdrop-filter: blur(14px) saturate(150%);
  -webkit-backdrop-filter: blur(14px) saturate(150%);
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 0.94rem;
  letter-spacing: -0.01em;
  cursor: pointer;
  overflow: hidden;
  transition: transform 0.45s cubic-bezier(0.16, 1, 0.3, 1), border-color 0.35s, box-shadow 0.45s;
}
.btn::after {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(120px 60px at var(--mx, 50%) var(--my, 50%), var(--accent-glow), transparent 70%);
  opacity: 0;
  transition: opacity 0.4s;
}
.btn:hover {
  transform: translateY(-2px);
  border-color: var(--glass-line-hi);
  box-shadow: 0 14px 40px -12px var(--accent-glow);
}
.btn:hover::after { opacity: 1; }
.btn > * { position: relative; z-index: 1; }
.btn-solid {
  background: linear-gradient(120deg, var(--accent-a), var(--accent-b));
  border-color: transparent;
  color: #05070f;
}
.btn-solid:hover { box-shadow: 0 18px 50px -14px var(--accent-glow); }
.btn-ghost { background: transparent; border-color: var(--glass-line); }

.arrow { transition: transform 0.4s cubic-bezier(0.16, 1, 0.3, 1); }
.btn:hover .arrow { transform: translateX(4px); }

/* ---------- Navigation ---------- */
.nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 60;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 1rem var(--pad-x);
  transition: background 0.5s, backdrop-filter 0.5s, border-color 0.5s, padding 0.5s;
  border-bottom: 1px solid transparent;
}
.nav.is-stuck { /* logo eases down a touch once pinned */
  background: rgba(4, 6, 13, 0.62);
  border-bottom-color: var(--glass-line);
  backdrop-filter: blur(22px) saturate(160%);
  -webkit-backdrop-filter: blur(22px) saturate(160%);
  padding-block: 0.55rem;
}
.nav.is-stuck .nav-logo img { height: 44px; }
.nav-logo img { transition: height 0.5s cubic-bezier(0.16, 1, 0.3, 1); }
.nav-logo { display: flex; align-items: center; gap: 0.75rem; }
.nav-logo img { height: 54px; width: auto; }
.nav-links { display: flex; align-items: center; gap: 0.35rem; }
.nav-link {
  position: relative;
  padding: 0.5rem 0.95rem;
  border-radius: 999px;
  font-size: 0.9rem;
  color: var(--mist);
  transition: color 0.3s, background 0.3s;
}
.nav-link:hover { color: var(--paper); background: var(--glass-bg-hi); }
.nav-link.is-active { color: var(--paper); }
.nav-link.is-active::after {
  content: "";
  position: absolute;
  left: 0.95rem; right: 0.95rem; bottom: 0.28rem;
  height: 2px; border-radius: 2px;
  background: linear-gradient(90deg, var(--accent-a), var(--accent-b));
}
.nav-back { font-size: 0.88rem; color: var(--mist); display: inline-flex; gap: 0.5rem; align-items: center; }
.nav-back:hover { color: var(--paper); }

/* Compact nav on small screens: one non-wrapping scrollable row.
   The CTA and the "All services" label drop out; the arrow stays. */
@media (max-width: 860px) {
  .nav { gap: 0.5rem; padding-inline: 1rem; }
  .nav-logo img { height: 40px; }
  .nav-links {
    flex: 1;
    justify-content: flex-end;
    overflow-x: auto;
    scrollbar-width: none;
    -ms-overflow-style: none;
    white-space: nowrap;
  }
  .nav-links::-webkit-scrollbar { display: none; }
  .nav-link { padding: 0.45rem 0.6rem; font-size: 0.82rem; }
  .nav-link.is-active::after { left: 0.6rem; right: 0.6rem; }
  .nav-links > .btn { display: none; }
  .nav-back { font-size: 0; gap: 0; margin-left: 0.35rem !important; }
  .nav-back svg { width: 17px; height: 17px; }
}
@media (max-width: 420px) {
  .nav-link { padding: 0.45rem 0.45rem; font-size: 0.78rem; }
}

/* Scroll progress rail */
.progress {
  position: fixed;
  top: 0; left: 0;
  height: 2px;
  width: 100%;
  transform-origin: 0 50%;
  transform: scaleX(0);
  background: linear-gradient(90deg, var(--accent-a), var(--accent-b), var(--gold));
  z-index: 70;
  will-change: transform;
}

/* ---------- Scroll-driven video stage ---------- */
.stage {
  position: relative;
  /* Height sets how much scroll distance drives the clip */
  height: var(--stage-h, 320vh);
}
.stage-pin {
  position: sticky;
  top: 0;
  height: 100vh;
  overflow: hidden;
  display: grid;
  place-items: center;
}
.stage-media {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  z-index: 0;
  opacity: 0;
  transition: opacity 1.1s cubic-bezier(0.16, 1, 0.3, 1);
}
.stage-media.is-ready { opacity: 1; }
/* Procedural fallback painted when no video file is present yet */
.stage-fallback {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  z-index: 0;
}
.stage-scrim {
  position: absolute;
  inset: 0;
  z-index: 1;
  background:
    radial-gradient(120% 80% at 50% 50%, transparent 20%, rgba(4,6,13,0.55) 72%, rgba(4,6,13,0.92) 100%),
    linear-gradient(180deg, rgba(4,6,13,0.7), rgba(4,6,13,0.15) 35%, rgba(4,6,13,0.15) 62%, rgba(4,6,13,0.88));
}
.stage-content {
  position: relative;
  z-index: 2;
  width: 100%;
  max-width: var(--shell);
  padding-inline: var(--pad-x);
  margin-inline: auto;
}

/* Caption cards that cross-fade as the clip scrubs */
.beats { position: relative; min-height: 46vh; }
.beat {
  position: absolute;
  inset-inline: 0;
  top: 0;
  opacity: 0;
  transform: translateY(28px) scale(0.985);
  transition: opacity 0.7s cubic-bezier(0.16, 1, 0.3, 1), transform 0.7s cubic-bezier(0.16, 1, 0.3, 1), filter 0.7s;
  filter: blur(6px);
  pointer-events: none;
}
.beat.is-live {
  opacity: 1;
  transform: none;
  filter: none;
  pointer-events: auto;
}
.beat-index {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.24em;
  color: var(--accent-b);
}

/* ---------- Reveal-on-scroll ---------- */
/* Longhands, not the `transition` shorthand: a var() inside the shorthand
   makes Chrome re-parse transition-property on every style recalc, which
   restarts the transition each frame and freezes it at its start value. */
[data-reveal] {
  opacity: 0;
  transform: translateY(var(--reveal-y, 34px));
  filter: blur(8px);
  transition-property: opacity, transform, filter;
  transition-duration: 0.95s, 1.05s, 0.95s;
  transition-timing-function: cubic-bezier(0.16, 1, 0.3, 1);
  transition-delay: 0s;  /* set concretely by motion.js from --reveal-delay */
  will-change: transform, opacity;
}
[data-reveal].is-in { opacity: 1; transform: none; filter: none; }
[data-reveal="left"]  { transform: translateX(-44px); }
[data-reveal="right"] { transform: translateX(44px); }
[data-reveal="scale"] { transform: scale(0.93); }
[data-reveal="clip"]  {
  transform: none; filter: none; clip-path: inset(0 0 100% 0);
  transition-property: clip-path, opacity;
  transition-duration: 1.2s, 0.6s;
  transition-timing-function: cubic-bezier(0.16, 1, 0.3, 1), linear;
}
[data-reveal="clip"].is-in { clip-path: inset(0 0 0 0); }

/* Per-character headline lift */
/* overflow:hidden is what hides the incoming line, but it also clips
   descenders (y, g, p). Pad the box and pull it back with margin. */
.split-line {
  display: block;
  overflow: hidden;
  padding-bottom: 0.18em;
  margin-bottom: -0.18em;
}
.split-line > span {
  display: inline-block;
  transform: translateY(105%);
  transition-property: transform;
  transition-duration: 1.05s;
  transition-timing-function: cubic-bezier(0.16, 1, 0.3, 1);
  transition-delay: 0s;  /* set concretely by motion.js */
}
.is-in .split-line > span, .split-line.is-in > span { transform: none; }

/* Parallax hook — offset applied by JS */
[data-parallax] { will-change: transform; }

/* ---------- Section furniture ---------- */
.band { padding-block: clamp(5rem, 11vh, 9rem); }
.band-tight { padding-block: clamp(3.5rem, 7vh, 6rem); }

.rule {
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--glass-line-hi), transparent);
  border: 0;
}

.section-head {
  display: grid;
  gap: 1.1rem;
  max-width: 760px;
  margin-bottom: clamp(2.5rem, 5vh, 4rem);
}

/* Cards grid */
.grid {
  display: grid;
  gap: clamp(1rem, 2vw, 1.6rem);
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 280px), 1fr));
}
.card {
  padding: clamp(1.5rem, 2.4vw, 2.2rem);
  display: flex;
  flex-direction: column;
  gap: 0.85rem;
  transition: transform 0.6s cubic-bezier(0.16, 1, 0.3, 1), border-color 0.4s, background 0.4s;
}
.card:hover {
  transform: translateY(-6px);
  border-color: var(--glass-line-hi);
  background: var(--glass-bg-hi);
}
.card-num {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.2em;
  color: var(--accent-b);
}
.card-ico {
  width: 44px; height: 44px;
  display: grid; place-items: center;
  border-radius: 13px;
  background: linear-gradient(140deg, var(--accent-a), var(--accent-b));
  color: #05070f;
  margin-bottom: 0.35rem;
}
.card-ico svg { width: 22px; height: 22px; }

/* Metric readouts */
.metrics {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: 1px;
  background: var(--glass-line);
  border: 1px solid var(--glass-line);
  border-radius: var(--r-lg);
  overflow: hidden;
}
.metric {
  background: rgba(7, 11, 22, 0.72);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  padding: clamp(1.4rem, 2.4vw, 2rem);
  display: grid;
  gap: 0.3rem;
}
.metric-num {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(2rem, 1.3rem + 2vw, 3.1rem);
  line-height: 1;
  letter-spacing: -0.04em;
  background: linear-gradient(120deg, var(--paper), var(--accent-b));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.metric-label { font-size: 0.84rem; color: var(--whisper); letter-spacing: 0.02em; }

/* Horizontal marquee */
.marquee {
  overflow: hidden;
  -webkit-mask-image: linear-gradient(90deg, transparent, #000 12%, #000 88%, transparent);
  mask-image: linear-gradient(90deg, transparent, #000 12%, #000 88%, transparent);
}
.marquee-track {
  display: flex;
  gap: 3.5rem;
  width: max-content;
  animation: slide 38s linear infinite;
}
.marquee:hover .marquee-track { animation-play-state: paused; }
.marquee-item {
  font-family: var(--font-display);
  font-size: clamp(1.4rem, 3vw, 2.4rem);
  font-weight: 600;
  letter-spacing: -0.03em;
  color: rgba(244, 246, 251, 0.2);
  white-space: nowrap;
  display: flex; align-items: center; gap: 3.5rem;
}
.marquee-item::after {
  content: "";
  width: 7px; height: 7px; border-radius: 50%;
  background: var(--accent-a);
}
@keyframes slide { to { transform: translateX(-50%); } }

/* Numbered process rail */
.rail { display: grid; gap: 0; }
.rail-item {
  display: grid;
  grid-template-columns: minmax(0, 88px) minmax(0, 1fr);
  gap: clamp(1rem, 3vw, 2.5rem);
  padding-block: clamp(1.6rem, 3vh, 2.6rem);
  border-top: 1px solid var(--glass-line);
  align-items: start;
  transition: background 0.5s;
}
.rail-item:last-child { border-bottom: 1px solid var(--glass-line); }
.rail-item:hover { background: rgba(255,255,255,0.022); }
.rail-step {
  font-family: var(--font-mono);
  font-size: 0.76rem;
  letter-spacing: 0.2em;
  color: var(--accent-b);
  padding-top: 0.35rem;
}
.rail-body { display: grid; gap: 0.6rem; }
@media (max-width: 620px) {
  .rail-item { grid-template-columns: 1fr; gap: 0.6rem; }
}

/* Pills */
.pills { display: flex; flex-wrap: wrap; gap: 0.55rem; }
.pill {
  padding: 0.42rem 0.95rem;
  border-radius: 999px;
  border: 1px solid var(--glass-line);
  background: var(--glass-bg);
  font-size: 0.84rem;
  color: var(--mist);
  transition: border-color 0.3s, color 0.3s, transform 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}
.pill:hover { border-color: var(--accent-a); color: var(--paper); transform: translateY(-2px); }

/* CTA block */
.cta {
  position: relative;
  padding: clamp(2.5rem, 6vw, 5rem);
  border-radius: var(--r-xl);
  text-align: center;
  display: grid;
  gap: 1.5rem;
  justify-items: center;
  overflow: hidden;
}
.cta::after {
  content: "";
  position: absolute;
  inset: -40%;
  background: conic-gradient(from 0deg, transparent, var(--accent-a), transparent 30%, var(--accent-b), transparent 60%);
  opacity: 0.14;
  animation: spin 22s linear infinite;
  z-index: -1;
}
@keyframes spin { to { transform: rotate(1turn); } }

/* Footer */
.foot {
  position: relative;
  z-index: 2;
  border-top: 1px solid var(--glass-line);
  padding: clamp(2.5rem, 5vw, 4rem) 0 2.5rem;
  margin-top: clamp(3rem, 8vh, 6rem);
}
.foot-grid {
  display: grid;
  gap: 2.5rem;
  grid-template-columns: minmax(0, 1.4fr) repeat(auto-fit, minmax(150px, 1fr));
  align-items: start;
}
.foot-logo { height: 58px; width: auto; margin-bottom: 1.1rem; }
.foot-col h4 {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--whisper);
  margin-bottom: 1rem;
}
.foot-col a { display: block; padding-block: 0.32rem; color: var(--mist); font-size: 0.92rem; transition: color 0.3s, transform 0.3s; }
.foot-col a:hover { color: var(--paper); transform: translateX(3px); }
.foot-base {
  margin-top: 3rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--glass-line);
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  justify-content: space-between;
  font-size: 0.82rem;
  color: var(--whisper);
}

/* Scroll hint */
.hint {
  position: absolute;
  bottom: 2rem;
  left: 50%;
  transform: translateX(-50%);
  z-index: 3;
  display: grid;
  justify-items: center;
  gap: 0.6rem;
  font-family: var(--font-mono);
  font-size: 0.66rem;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--whisper);
}
.hint-rail {
  width: 1px;
  height: 46px;
  background: linear-gradient(180deg, var(--glass-line-hi), transparent);
  position: relative;
  overflow: hidden;
}
.hint-rail::after {
  content: "";
  position: absolute;
  top: -46px; left: 0;
  width: 1px; height: 46px;
  background: linear-gradient(180deg, transparent, var(--accent-b));
  animation: fall 2.2s var(--ease-io) infinite;
}
@keyframes fall { to { transform: translateY(92px); } }

/* ---------- Accessibility ---------- */
:focus-visible {
  outline: 2px solid var(--accent-b);
  outline-offset: 3px;
  border-radius: 6px;
}
.skip {
  position: absolute;
  left: -9999px;
  top: 0;
  z-index: 200;
  padding: 0.75rem 1.25rem;
  background: var(--ink-700);
  border-radius: 0 0 10px 0;
}
.skip:focus { left: 0; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
  }
  [data-reveal] { opacity: 1 !important; transform: none !important; filter: none !important; clip-path: none !important; }
  .split-line > span { transform: none !important; }
  .beat { position: relative; opacity: 1; transform: none; filter: none; margin-bottom: 2rem; }
  .stage { height: auto !important; }
  .stage-pin { position: relative; height: auto; padding-block: 6rem; }
}