/* Trecillo × ZUKU — interactive corporate site
   Official CI lockups in the chrome; cinematic dark stage for Hype / Swipe / Jump. */

:root {
  --ink: #101820;
  --trecillo: #E91E63;
  --trecillo-ink: #14171F;
  --zuku-swipe: #FFD600;
  --zuku-jump: #EC008C;
  --zuku-hype: #00BCF2;

  --bg: #0a0a0f;
  --bg-raised: #12121a;
  --bg-elevated: #1a1a2e;
  --line: #23233a;
  --line-strong: #34345a;

  --text: #ffffff;
  --text-muted: #a0a0b8;
  --text-faint: #6a6a80;

  --brand: #00BCF2;
  --brand-bright: #5ce1e6;
  --brand-deep: #00a8d6;

  --hype: #00d4ff;
  --swipe: #ff2d78;
  --jump: #00ff88;
  --purple: #6366f1;

  --accent: var(--hype);
  --maxw: 1180px;
  --pad: clamp(1.25rem, 5vw, 4.5rem);
  --radius: 18px;

  --ease: cubic-bezier(0.22, 1, 0.36, 1);
  --spring: cubic-bezier(0.34, 1.56, 0.64, 1);

  --font-sans: "Pretendard Variable", Pretendard, -apple-system, BlinkMacSystemFont,
    "Segoe UI", "Noto Sans KR", "Malgun Gothic", Roboto, Helvetica, Arial, sans-serif;
  --font-display: Syne, var(--font-sans);
  --font-mono: "IBM Plex Mono", "SFMono-Regular", "JetBrains Mono", ui-monospace, Menlo, Consolas, monospace;

  --mx: 50%;
  --my: 30%;
}

html[data-mode="hype"] { --accent: var(--hype); }
html[data-mode="swipe"] { --accent: var(--swipe); }
html[data-mode="jump"] { --accent: var(--jump); }
html[data-mode="thread"] { --accent: var(--brand-bright); }
html[data-mode="vive"] { --accent: #e8c547; }
html[data-mode="vine"] { --accent: #b44dff; }
html[data-mode="aist"] { --accent: var(--purple); }
html[data-mode="tech"] { --accent: var(--brand); }
html[data-mode="company"] { --accent: var(--brand-bright); }

@view-transition { navigation: auto; }

*,
*::before,
*::after { box-sizing: border-box; }

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
  color-scheme: dark;
  overflow-x: clip;
}

html, body {
  max-width: 100%;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.7;
  letter-spacing: -0.01em;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }

h1, h2, h3 {
  margin: 0;
  font-weight: 800;
  letter-spacing: -0.04em;
  line-height: 1.06;
}

h1, .contact h2, .company-copy h2, .tech-heading h2, .statement {
  font-family: var(--font-display);
}

p { margin: 0; }

::selection { background: var(--accent); color: #04121a; }

:focus-visible {
  outline: 2px solid var(--brand-bright);
  outline-offset: 3px;
  border-radius: 4px;
}

.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  z-index: 100;
  padding: 0.75rem 1.25rem;
  background: var(--brand);
  color: #04121a;
  font-weight: 700;
}
.skip-link:focus { left: 1rem; top: 1rem; }

.progress {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  z-index: 40;
  pointer-events: none;
  background: transparent;
}
.progress-bar {
  display: block;
  height: 100%;
  width: 0%;
  background: linear-gradient(90deg, var(--accent), var(--brand-bright));
  box-shadow: 0 0 12px color-mix(in srgb, var(--accent) 70%, transparent);
  transform-origin: left;
}

.noise {
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  opacity: 0.035;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='160' height='160'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='3'/%3E%3C/filter%3E%3Crect width='160' height='160' filter='url(%23n)'/%3E%3C/svg%3E");
}

.spot {
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background: radial-gradient(
    520px circle at var(--mx) var(--my),
    color-mix(in srgb, var(--accent) 16%, transparent),
    transparent 55%
  );
  transition: background-color 0.6s var(--ease);
}

.site-header,
main,
footer { position: relative; z-index: 1; }

/* ---------- header ---------- */

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
  padding: 1.1rem var(--pad);
  background: color-mix(in srgb, var(--bg) 78%, transparent);
  backdrop-filter: blur(18px) saturate(140%);
  -webkit-backdrop-filter: blur(18px) saturate(140%);
  border-bottom: 1px solid transparent;
  transition: border-color 0.3s var(--ease), background 0.3s var(--ease);
}

.site-header.is-stuck {
  border-bottom-color: var(--line);
  background: color-mix(in srgb, var(--bg) 92%, transparent);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.7rem;
  min-width: 0;
  flex: 0 1 auto;
}

.brand img {
  display: block;
}

.brand img.brand-trecillo {
  height: 32px;
  width: auto;
  max-width: min(196px, 46vw);
  flex-shrink: 1;
}

.brand img.brand-zuku {
  width: 28px;
  height: 28px;
  object-fit: contain;
  flex-shrink: 0;
}

.brand img.brand-teapot {
  width: 26px;
  height: 26px;
  object-fit: cover;
  border-radius: 6px;
  flex-shrink: 0;
}

.brand-sep {
  width: 1px;
  height: 22px;
  background: var(--line-strong);
  flex-shrink: 0;
}

.brand-name {
  font-size: 1.05rem;
  font-weight: 800;
  letter-spacing: 0.16em;
}

.company {
  font-family: var(--font-mono);
  font-size: 0.62rem;
  letter-spacing: 0.24em;
  color: var(--text-faint);
  padding-left: 0.6rem;
  border-left: 1px solid var(--line-strong);
  white-space: nowrap;
}

.site-header nav {
  display: flex;
  align-items: center;
  gap: clamp(0.9rem, 2.5vw, 2rem);
  font-size: 0.87rem;
  color: var(--text-muted);
}

.site-header nav a { transition: color 0.2s var(--ease); }
.site-header nav a:hover,
.site-header nav a.is-current { color: var(--text); }

.site-header nav a.is-current {
  color: var(--accent);
}

.nav-cta {
  padding: 0.45rem 1.1rem;
  border: 1px solid var(--line-strong);
  border-radius: 999px;
  color: var(--text);
  transition: border-color 0.25s var(--ease), background 0.25s var(--ease), color 0.25s var(--ease), transform 0.2s var(--ease);
}
.nav-cta:hover {
  border-color: var(--accent);
  background: color-mix(in srgb, var(--accent) 14%, transparent);
  color: var(--brand-bright);
}

/* ---------- sections ---------- */

section {
  max-width: var(--maxw);
  margin-inline: auto;
  padding-inline: var(--pad);
}

#stage,
#platform,
#technology,
#company {
  scroll-margin-top: 5.5rem;
}

.section-label {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.32em;
  color: var(--text-faint);
  margin-bottom: 1.5rem;
}

/* ---------- hero ---------- */

.hero {
  position: relative;
  padding-block: clamp(3.5rem, 10vh, 7rem) clamp(3rem, 8vh, 5.5rem);
  overflow: hidden;
}

.field {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 0;
  opacity: 0.7;
}

.hero-orbit {
  position: absolute;
  border-radius: 50%;
  filter: blur(90px);
  opacity: 0.5;
  pointer-events: none;
  z-index: 0;
  transition: background 0.7s var(--ease);
}

.orbit-one {
  width: min(46vw, 520px);
  aspect-ratio: 1;
  top: -8%;
  right: -6%;
  background: radial-gradient(circle, color-mix(in srgb, var(--accent) 55%, transparent), transparent 68%);
  animation: drift 22s ease-in-out infinite alternate;
}

.orbit-two {
  width: min(34vw, 400px);
  aspect-ratio: 1;
  bottom: 18%;
  left: -10%;
  background: radial-gradient(circle, color-mix(in srgb, var(--purple) 50%, transparent), transparent 70%);
  animation: drift 28s ease-in-out infinite alternate-reverse;
}

html[data-mode="swipe"] .orbit-two {
  background: radial-gradient(circle, color-mix(in srgb, var(--hype) 40%, transparent), transparent 70%);
}
html[data-mode="jump"] .orbit-two {
  background: radial-gradient(circle, color-mix(in srgb, var(--hype) 45%, transparent), transparent 70%);
}

@keyframes drift {
  from { transform: translate3d(0, 0, 0) scale(1); }
  to { transform: translate3d(-4%, 6%, 0) scale(1.12); }
}

.eyebrow {
  position: relative;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.34em;
  color: var(--accent);
  margin-bottom: 1.6rem;
  transition: color 0.5s var(--ease);
}

.hero h1 {
  position: relative;
  font-size: clamp(2.7rem, 9.5vw, 6.8rem);
  margin-bottom: 1.6rem;
}

.hero h1 em {
  font-style: normal;
  background: linear-gradient(120deg, var(--brand-bright), var(--accent) 50%, var(--purple));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  background-size: 180% 100%;
  animation: sheen 8s ease-in-out infinite;
}

@keyframes sheen {
  0%, 100% { background-position: 0% 50%; }
  50% { background-position: 100% 50%; }
}

.hero-copy {
  position: relative;
  max-width: 44ch;
  color: var(--text-muted);
  font-size: clamp(1rem, 1.5vw, 1.12rem);
  margin-bottom: 2.2rem;
}

.hero-actions {
  position: relative;
  display: flex;
  flex-wrap: wrap;
  gap: 0.85rem;
  margin-bottom: 2.8rem;
}

.button {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  padding: 0.85rem 1.7rem;
  border-radius: 999px;
  font-size: 0.92rem;
  font-weight: 600;
  border: 1px solid transparent;
  transition: transform 0.25s var(--ease), box-shadow 0.25s var(--ease),
    background 0.25s var(--ease), border-color 0.25s var(--ease);
}

.button span { transition: transform 0.25s var(--ease); }
.button:hover span { transform: translate(2px, 2px); }
.button.ghost:hover span { transform: translate(2px, -2px); }

.button.primary {
  background: linear-gradient(120deg, var(--brand-bright), var(--brand-deep));
  color: #04121a;
}
.button.primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 16px 40px -16px color-mix(in srgb, var(--accent) 85%, transparent);
}

.button.ghost {
  border-color: var(--line-strong);
  color: var(--text);
}
.button.ghost:hover {
  border-color: var(--accent);
  background: color-mix(in srgb, var(--accent) 10%, transparent);
}

.hero-in {
  animation: rise 0.9s var(--ease) both;
}
.eyebrow.hero-in { animation-delay: 0.05s; }
.hero h1.hero-in { animation-delay: 0.14s; }
.hero-copy.hero-in { animation-delay: 0.26s; }
.hero-actions.hero-in { animation-delay: 0.36s; }

@keyframes rise {
  from { opacity: 0; transform: translateY(22px); }
  to { opacity: 1; transform: none; }
}

/* ---------- stage ---------- */

.stage {
  position: relative;
  --stage-accent: var(--accent);
  border: 1px solid color-mix(in srgb, var(--stage-accent) 28%, var(--line));
  border-radius: calc(var(--radius) + 6px);
  background:
    linear-gradient(180deg, color-mix(in srgb, var(--bg-elevated) 65%, transparent), var(--bg-raised));
  box-shadow:
    0 0 0 1px color-mix(in srgb, var(--stage-accent) 8%, transparent),
    0 30px 80px -40px color-mix(in srgb, var(--stage-accent) 45%, transparent);
  overflow: hidden;
  transition: border-color 0.5s var(--ease), box-shadow 0.5s var(--ease);
}

.stage-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.7rem 0.85rem 0.7rem 0.7rem;
  border-bottom: 1px solid var(--line);
  background: color-mix(in srgb, var(--bg) 55%, transparent);
}

.stage-tabs {
  display: flex;
  gap: 0.25rem;
}

.stage-tab {
  appearance: none;
  border: 0;
  background: transparent;
  color: var(--text-muted);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  padding: 0.55rem 0.95rem;
  border-radius: 999px;
  cursor: pointer;
  transition: color 0.2s var(--ease), background 0.2s var(--ease);
}

a.stage-tab { display: inline-flex; align-items: center; }

.stage-tab .tab-num {
  color: var(--text-faint);
  margin-right: 0.35rem;
}

.stage-tab:hover { color: var(--text); }

.stage-tab[aria-selected="true"],
.stage-tab[aria-current="page"] {
  background: color-mix(in srgb, var(--accent) 16%, transparent);
  color: var(--text);
}
.stage-tab[aria-selected="true"] .tab-num,
.stage-tab[aria-current="page"] .tab-num { color: var(--accent); }

.stage-live {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  font-family: var(--font-mono);
  font-size: 0.62rem;
  letter-spacing: 0.22em;
  color: var(--text-faint);
}
.stage-live span {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 10px var(--accent);
  animation: live 1.6s ease-in-out infinite;
}

@keyframes live {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.35; transform: scale(0.75); }
}

.stage-frame {
  position: relative;
  min-height: min(58vh, 540px);
}

.stage-panel {
  display: none;
  min-height: min(58vh, 540px);
}
.stage-panel.is-active {
  display: flex;
  flex-direction: column;
}

/* Hype */

.hype-world {
  position: relative;
  flex: 1;
  min-height: min(48vh, 440px);
  overflow: hidden;
  cursor: ew-resize;
  outline: none;
}

.hype-scene {
  position: absolute;
  inset: 0;
  opacity: 0;
  transition: opacity 0.55s var(--ease);
  pointer-events: none;
}
.hype-scene.is-on { opacity: 1; }

.hype-scene.s1 {
  background:
    radial-gradient(120% 80% at 50% 120%, color-mix(in srgb, var(--hype) 28%, transparent), transparent 55%),
    linear-gradient(#0b1118, #07080e);
}
.horizon {
  position: absolute;
  left: 8%;
  right: 8%;
  bottom: 28%;
  height: 42%;
  border: 1px solid color-mix(in srgb, var(--hype) 45%, transparent);
  border-radius: 12px;
  background:
    linear-gradient(180deg, transparent 40%, color-mix(in srgb, var(--hype) 18%, transparent)),
    repeating-linear-gradient(
      90deg,
      transparent 0 18px,
      color-mix(in srgb, var(--hype) 12%, transparent) 18px 19px
    );
  transform: perspective(600px) rotateX(18deg) translate3d(var(--hx, 0px), var(--hy, 0px), 0);
  box-shadow: 0 0 80px color-mix(in srgb, var(--hype) 20%, transparent);
}
.letterbox {
  position: absolute;
  inset: 0;
  background:
    linear-gradient(var(--bg) 0 9%, transparent 9% 91%, var(--bg) 91%);
  opacity: 0.55;
}
.hype-card {
  position: absolute;
  width: min(22%, 180px);
  aspect-ratio: 4 / 5;
  border-radius: 10px;
  border: 1px solid color-mix(in srgb, var(--hype) 40%, white 10%);
  background: linear-gradient(160deg, #15323a, #0a1520);
  transform: translate3d(var(--hx, 0px), var(--hy, 0px), 0);
}
.hype-card.c-left { left: 6%; top: 18%; transform: translate3d(calc(var(--hx, 0px) * 1.6), calc(var(--hy, 0px) * 1.4), 0) rotate(-8deg); }
.hype-card.c-right { right: 8%; top: 22%; background: linear-gradient(160deg, #1a2840, #0c1018); transform: translate3d(calc(var(--hx, 0px) * -1.4), calc(var(--hy, 0px) * 1.8), 0) rotate(7deg); }

.hype-scene.s2 {
  background: radial-gradient(80% 70% at 70% 20%, color-mix(in srgb, var(--purple) 22%, transparent), #08080e);
}
.masonry {
  position: absolute;
  inset: 12% 10% 22%;
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  grid-template-rows: 1.1fr 0.9fr;
  gap: 12px;
  transform: translate3d(var(--hx, 0px), var(--hy, 0px), 0);
}
.tile {
  display: block;
  border-radius: 12px;
  border: 1px solid color-mix(in srgb, var(--hype) 30%, transparent);
}
.tile.t1 { grid-row: 1 / 3; background: linear-gradient(145deg, #12323c, #0a1018 60%, #1a3a48); }
.tile.t2 { background: linear-gradient(145deg, #2a1840, #101018); }
.tile.t3 { background: linear-gradient(145deg, #0e2a28, #101820); }

.hype-scene.s3 {
  background: #07070c;
  display: grid;
  place-items: center;
}
.tunnel {
  position: relative;
  width: min(70%, 520px);
  aspect-ratio: 16 / 9;
  transform: translate3d(var(--hx, 0px), var(--hy, 0px), 0);
}
.tunnel span {
  position: absolute;
  inset: 0;
  border: 1px solid color-mix(in srgb, var(--hype) 50%, transparent);
  border-radius: 18px;
  animation: tunnel 5.5s var(--ease) infinite;
}
.tunnel span:nth-child(2) { inset: 12%; animation-delay: -1.8s; }
.tunnel span:nth-child(3) { inset: 24%; animation-delay: -3.6s; }

@keyframes tunnel {
  0% { transform: scale(0.55); opacity: 0; }
  35% { opacity: 1; }
  100% { transform: scale(1.35); opacity: 0; }
}

.hype-title {
  position: absolute;
  left: 1.25rem;
  bottom: 3.4rem;
  font-family: var(--font-display);
  font-size: clamp(2rem, 6vw, 4rem);
  letter-spacing: -0.05em;
  color: color-mix(in srgb, var(--text) 88%, var(--hype));
  text-shadow: 0 10px 40px #000;
}

.hype-chrome {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  display: flex;
  justify-content: space-between;
  padding: 0.7rem 1.1rem;
  font-family: var(--font-mono);
  font-size: 0.64rem;
  letter-spacing: 0.18em;
  color: var(--text-muted);
  background: linear-gradient(transparent, color-mix(in srgb, #000 55%, transparent));
  pointer-events: none;
}

.hype-controls {
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 0.85rem;
  padding: 0.7rem 1rem 0.85rem;
  border-top: 1px solid var(--line);
  background: color-mix(in srgb, var(--bg) 80%, transparent);
}

.icon-btn {
  appearance: none;
  width: 36px;
  height: 36px;
  border: 1px solid var(--line-strong);
  border-radius: 50%;
  background: transparent;
  color: var(--text);
  cursor: pointer;
  font-size: 0.7rem;
  line-height: 1;
  transition: border-color 0.2s var(--ease), color 0.2s var(--ease);
}
.icon-btn:hover { border-color: var(--hype); color: var(--hype); }

#hype-scrub {
  -webkit-appearance: none;
  appearance: none;
  width: 100%;
  height: 4px;
  border-radius: 99px;
  background: linear-gradient(90deg, var(--hype), var(--purple));
  background-size: var(--p, 0%) 100%;
  background-repeat: no-repeat;
  background-color: var(--line);
  outline: none;
  cursor: pointer;
}
#hype-scrub::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: #fff;
  box-shadow: 0 0 0 4px color-mix(in srgb, var(--hype) 35%, transparent);
}
#hype-scrub::-moz-range-thumb {
  width: 14px;
  height: 14px;
  border: 0;
  border-radius: 50%;
  background: #fff;
}

.hype-hint {
  font-family: var(--font-mono);
  font-size: 0.62rem;
  letter-spacing: 0.12em;
  color: var(--text-faint);
  white-space: nowrap;
}

/* Swipe */

.swipe-shell {
  flex: 1;
  display: grid;
  place-items: center;
  padding: 1.4rem 1rem 1.1rem;
  background:
    radial-gradient(60% 80% at 50% 40%, color-mix(in srgb, var(--swipe) 16%, transparent), transparent 70%),
    #08080d;
}

.swipe-phone {
  position: relative;
  width: min(280px, 78vw);
  height: min(480px, 52vh);
  border-radius: 28px;
  border: 2px solid color-mix(in srgb, var(--swipe) 45%, #fff 10%);
  background: #050508;
  overflow: hidden;
  box-shadow:
    0 0 0 6px #111118,
    0 24px 60px -20px color-mix(in srgb, var(--swipe) 40%, transparent);
}

.swipe-notch {
  position: absolute;
  top: 8px;
  left: 50%;
  width: 88px;
  height: 10px;
  transform: translateX(-50%);
  background: #000;
  border-radius: 99px;
  z-index: 3;
}

.swipe-reel {
  height: 100%;
  overflow-y: auto;
  scroll-snap-type: y mandatory;
  overscroll-behavior: contain;
  scrollbar-width: none;
  outline: none;
}
.swipe-reel::-webkit-scrollbar { display: none; }

.swipe-clip {
  position: relative;
  height: 100%;
  scroll-snap-align: start;
  scroll-snap-stop: always;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  overflow: hidden;
}

.clip-art {
  position: absolute;
  inset: 0;
}

.clip-a .clip-art {
  background:
    radial-gradient(circle at 50% 38%, #ff6ba8, transparent 42%),
    linear-gradient(180deg, #2a1020, #120810);
  animation: drift 10s ease-in-out infinite alternate;
}
.clip-a .clip-art::after {
  content: "";
  position: absolute;
  inset: 0;
  background: repeating-linear-gradient(
    transparent 0 22px,
    color-mix(in srgb, #fff 8%, transparent) 22px 23px
  );
  animation: rain 2.4s linear infinite;
  mask-image: linear-gradient(#000, transparent 80%);
}
.clip-b .clip-art {
  background: conic-gradient(from 120deg, #ff2d78, #5ce1e6, #b44dff, #ff2d78);
  filter: saturate(1.2);
  animation: spinSlow 18s linear infinite;
  transform-origin: 50% 40%;
}
.clip-c .clip-art {
  background:
    linear-gradient(#0c0c14, #141428),
    repeating-linear-gradient(90deg, transparent 0 28px, color-mix(in srgb, var(--swipe) 35%, transparent) 28px 29px),
    repeating-linear-gradient(0deg, transparent 0 28px, color-mix(in srgb, var(--hype) 25%, transparent) 28px 29px);
  background-blend-mode: overlay, normal, normal;
}
.clip-c .clip-art::before {
  content: "";
  position: absolute;
  width: 42%;
  aspect-ratio: 1;
  left: 29%;
  top: 22%;
  border: 2px solid var(--swipe);
  border-radius: 12px;
  animation: pulseBox 2.2s var(--ease) infinite;
}
.clip-d .clip-art {
  background: radial-gradient(circle at 50% 45%, #3a1830, #08080e 62%);
}
.clip-d .clip-art::before,
.clip-d .clip-art::after {
  content: "";
  position: absolute;
  left: 18%;
  right: 18%;
  height: 2px;
  background: var(--swipe);
  top: 38%;
  transform-origin: left;
  animation: bar 1.6s var(--ease) infinite;
}
.clip-d .clip-art::after { top: 48%; animation-delay: 0.35s; width: 48%; left: 26%; }

@keyframes rain { to { transform: translateY(23px); } }
@keyframes spinSlow { to { transform: rotate(1turn); } }
@keyframes pulseBox {
  0%, 100% { transform: scale(0.92); opacity: 0.5; }
  50% { transform: scale(1.05); opacity: 1; }
}
@keyframes bar {
  0%, 100% { transform: scaleX(0.35); opacity: 0.4; }
  50% { transform: scaleX(1); opacity: 1; }
}

.clip-copy {
  position: relative;
  z-index: 2;
  padding: 1.2rem 3.2rem 1.4rem 1.1rem;
  background: linear-gradient(transparent, rgba(0, 0, 0, 0.72));
}
.clip-meta {
  font-family: var(--font-mono);
  font-size: 0.64rem;
  letter-spacing: 0.14em;
  color: #ffd0e2;
  margin-bottom: 0.35rem;
}
.clip-copy h3 {
  font-family: var(--font-display);
  font-size: 1.35rem;
  margin-bottom: 0.25rem;
}
.clip-copy p { font-size: 0.82rem; color: #e8dce4; }

.swipe-rail {
  position: absolute;
  right: 10px;
  bottom: 88px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  z-index: 3;
  pointer-events: none;
}
.rail-btn {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  border: 1px solid color-mix(in srgb, #fff 35%, transparent);
  background: color-mix(in srgb, #000 35%, transparent);
}
.rail-btn.like { background: radial-gradient(circle at 50% 55%, var(--swipe), #4a1028); }

.swipe-dots {
  position: absolute;
  top: 50%;
  left: 8px;
  transform: translateY(-50%);
  display: flex;
  flex-direction: column;
  gap: 6px;
  z-index: 3;
}
.swipe-dots i {
  display: block;
  width: 4px;
  height: 4px;
  border-radius: 99px;
  background: color-mix(in srgb, #fff 35%, transparent);
  transition: height 0.25s var(--ease), background 0.25s var(--ease);
}
.swipe-dots i.is-on {
  height: 16px;
  background: #fff;
}

.swipe-hint {
  margin-top: 0.9rem;
  font-family: var(--font-mono);
  font-size: 0.62rem;
  letter-spacing: 0.16em;
  color: var(--text-faint);
  text-align: center;
}

/* Jump */

.jump-wrap {
  position: relative;
  flex: 1;
  min-height: min(52vh, 500px);
  background: #07070c;
}

#jump-canvas {
  display: block;
  width: 100%;
  height: 100%;
  cursor: pointer;
  touch-action: none;
}

.jump-hud {
  position: absolute;
  top: 0.9rem;
  left: 1.1rem;
  right: 1.1rem;
  display: flex;
  justify-content: space-between;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.2em;
  color: var(--jump);
  pointer-events: none;
}

.jump-overlay {
  position: absolute;
  inset: 0;
  display: grid;
  place-content: center;
  text-align: center;
  gap: 0.4rem;
  background: color-mix(in srgb, #07070c 45%, transparent);
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s var(--ease);
}
.jump-overlay.is-on { opacity: 1; }
.jump-overlay p {
  font-family: var(--font-display);
  font-size: clamp(2.4rem, 6vw, 4rem);
  color: var(--jump);
}
.jump-overlay span {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.16em;
  color: var(--text-muted);
}

/* ---------- manifesto ---------- */

.manifesto { padding-block: clamp(4rem, 10vh, 7rem); }

.statement {
  font-size: clamp(1.85rem, 5.2vw, 3.4rem);
  font-weight: 800;
  line-height: 1.16;
  letter-spacing: -0.04em;
  margin-bottom: 1.8rem;
}

.statement strong {
  font-weight: 800;
  color: var(--accent);
  transition: color 0.5s var(--ease);
}

.manifesto-copy {
  max-width: 62ch;
  color: var(--text-muted);
  font-size: clamp(1rem, 1.4vw, 1.08rem);
}

/* ---------- formats ---------- */

.formats {
  display: grid;
  gap: 1.1rem;
  padding-block: clamp(3rem, 8vh, 5rem);
}

a.format-card { color: inherit; }
a.format-card:hover { color: inherit; }

.format-card {
  --card-accent: var(--brand);
  position: relative;
  display: grid;
  grid-template-columns: auto 1fr;
  align-items: center;
  gap: clamp(1.25rem, 4vw, 3.5rem);
  padding: clamp(1.6rem, 4vw, 2.75rem);
  background: linear-gradient(140deg, var(--bg-raised), color-mix(in srgb, var(--bg-elevated) 55%, var(--bg-raised)));
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  transition: transform 0.4s var(--ease), border-color 0.4s var(--ease);
}

.format-card::before {
  content: "";
  position: absolute;
  inset: 0 auto 0 0;
  width: 3px;
  background: var(--card-accent);
  opacity: 0.75;
}

.format-card::after {
  content: "";
  position: absolute;
  top: -40%;
  right: -10%;
  width: 45%;
  aspect-ratio: 1;
  border-radius: 50%;
  background: radial-gradient(circle, color-mix(in srgb, var(--card-accent) 26%, transparent), transparent 70%);
  filter: blur(50px);
  opacity: 0;
  transition: opacity 0.5s var(--ease);
  pointer-events: none;
}

.format-card:hover {
  transform: translateY(-4px);
  border-color: color-mix(in srgb, var(--card-accent) 45%, var(--line));
}
.format-card:hover::after { opacity: 1; }

.format-card.hype { --card-accent: var(--hype); }
.format-card.swipe { --card-accent: var(--swipe); }
.format-card.jump { --card-accent: var(--jump); }

.format-number {
  font-family: var(--font-mono);
  font-size: clamp(2rem, 6vw, 3.6rem);
  font-weight: 700;
  color: transparent;
  -webkit-text-stroke: 1px color-mix(in srgb, var(--card-accent) 55%, transparent);
  line-height: 1;
}

.format-art {
  display: none;
  gap: 6px;
  align-items: flex-end;
  height: 46px;
}

.format-art span {
  display: block;
  width: 6px;
  border-radius: 3px;
  background: var(--card-accent);
  opacity: 0.55;
  animation: pulse 1.8s var(--ease) infinite;
}
.format-art span:nth-child(1) { height: 40%; animation-delay: 0s; }
.format-art span:nth-child(2) { height: 100%; animation-delay: 0.2s; }
.format-art span:nth-child(3) { height: 65%; animation-delay: 0.4s; }

@keyframes pulse {
  0%, 100% { transform: scaleY(0.6); opacity: 0.4; }
  50% { transform: scaleY(1); opacity: 0.9; }
}

.format-content .tag {
  font-family: var(--font-mono);
  font-size: 0.64rem;
  letter-spacing: 0.26em;
  color: var(--card-accent);
  margin-bottom: 0.7rem;
}

.format-content h2 {
  font-family: var(--font-display);
  font-size: clamp(1.6rem, 3.4vw, 2.2rem);
  margin-bottom: 0.6rem;
}

.format-content p {
  color: var(--text-muted);
  max-width: 56ch;
  font-size: 0.98rem;
}

.format-try {
  appearance: none;
  margin-top: 1.1rem;
  padding: 0;
  border: 0;
  background: none;
  color: var(--card-accent);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  cursor: pointer;
}
.format-try span { display: inline-block; transition: transform 0.25s var(--ease); }
.format-try:hover span { transform: translate(3px, -3px); }

/* ---------- technology ---------- */

.technology { padding-block: clamp(4rem, 10vh, 7rem); }

.tech-heading h2 {
  font-size: clamp(1.9rem, 5vw, 3.2rem);
  margin-bottom: 3rem;
}

.tech-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
}

.tech-grid article,
.tech-grid a.tilt {
  padding: clamp(1.5rem, 3vw, 2.2rem);
  background: var(--bg);
  transition: background 0.35s var(--ease);
  transform-style: preserve-3d;
  color: inherit;
  display: block;
}
.tech-grid article:hover,
.tech-grid a.tilt:hover { background: var(--bg-raised); }

.tech-icon {
  display: block;
  font-size: 1.35rem;
  color: var(--accent);
  margin-bottom: 1rem;
  transition: color 0.4s var(--ease), transform 0.35s var(--spring);
}
.tech-grid article:hover .tech-icon { transform: rotate(12deg) scale(1.15); }

.tech-grid h3 {
  font-size: 1.02rem;
  letter-spacing: -0.02em;
  margin-bottom: 0.6rem;
}

.tech-grid p {
  color: var(--text-muted);
  font-size: 0.92rem;
}

.tech-note {
  margin-top: 1.5rem;
  font-size: 0.84rem;
  color: var(--text-faint);
}

/* ---------- company ---------- */

.company-section {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(2rem, 5vw, 4rem);
  padding-block: clamp(4rem, 10vh, 7rem);
  border-top: 1px solid var(--line);
}

.company-mark {
  appearance: none;
  border: 0;
  background: none;
  padding: 0;
  cursor: pointer;
  text-align: left;
  font-family: var(--font-display);
  font-size: clamp(2.2rem, 7vw, 4.4rem);
  font-weight: 800;
  letter-spacing: -0.05em;
  line-height: 1;
  color: transparent;
  -webkit-text-stroke: 1px var(--line-strong);
  transition: -webkit-text-stroke-color 0.3s var(--ease);
}
a.company-mark { display: block; text-decoration: none; }
.company-mark:hover { -webkit-text-stroke-color: var(--accent); }
.company-mark img {
  width: min(320px, 100%);
  height: auto;
  display: block;
}

.company-mark span {
  -webkit-text-stroke: 0;
  color: var(--brand);
  font-size: 0.3em;
  vertical-align: super;
}

.tresillo {
  display: flex;
  gap: 6px;
  align-items: flex-end;
  height: 42px;
  margin-top: 1.4rem;
}
.tresillo span {
  flex: 1;
  max-width: 18px;
  height: 28%;
  border-radius: 2px;
  background: var(--line-strong);
  transform-origin: bottom;
}
.tresillo.is-playing span {
  animation: tresillo 1.6s var(--ease) both;
  animation-delay: calc(var(--i) * 90ms);
}
.tresillo span:nth-child(1),
.tresillo span:nth-child(4),
.tresillo span:nth-child(7) { background: var(--accent); height: 100%; }

@keyframes tresillo {
  0%, 100% { transform: scaleY(0.35); }
  35% { transform: scaleY(1); }
}

.beat-caption {
  margin-top: 0.7rem;
  font-family: var(--font-mono);
  font-size: 0.62rem;
  letter-spacing: 0.18em;
  color: var(--text-faint);
}

.company-copy h2 {
  font-size: clamp(1.7rem, 4vw, 2.6rem);
  margin-bottom: 1.5rem;
}

.company-copy > p {
  color: var(--text-muted);
  max-width: 58ch;
  margin-bottom: 2.5rem;
}

.company-copy dl {
  display: grid;
  gap: 0;
  margin: 0;
  border-top: 1px solid var(--line);
}

.company-copy dl > div {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  justify-content: space-between;
  padding: 0.9rem 0;
  border-bottom: 1px solid var(--line);
}

.company-copy dt {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.22em;
  color: var(--text-faint);
  text-transform: uppercase;
}

.company-copy dd {
  margin: 0;
  font-size: 0.95rem;
}

.company-copy dd a {
  color: var(--brand-bright);
  transition: opacity 0.2s var(--ease);
}
.company-copy dd a:hover { opacity: 0.75; }

/* ---------- contact ---------- */

.contact {
  text-align: center;
  padding-block: clamp(5rem, 14vh, 9rem);
  border-top: 1px solid var(--line);
}

.contact h2 {
  font-size: clamp(2.2rem, 8vw, 5rem);
  margin-bottom: 2.5rem;
}

.contact h2 em {
  font-style: normal;
  background: linear-gradient(120deg, var(--brand-bright), var(--accent) 40%, var(--purple));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.contact-link {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-size: clamp(1rem, 2.4vw, 1.3rem);
  font-weight: 600;
  padding-bottom: 0.35rem;
  border-bottom: 1px solid var(--line-strong);
  transition: color 0.25s var(--ease), border-color 0.25s var(--ease);
}
.contact-link:hover {
  color: var(--brand-bright);
  border-bottom-color: var(--accent);
}

/* ---------- footer ---------- */

footer {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem 2rem;
  justify-content: space-between;
  align-items: center;
  max-width: var(--maxw);
  margin-inline: auto;
  padding: 2rem var(--pad) 3rem;
  border-top: 1px solid var(--line);
  font-family: var(--font-mono);
  font-size: 0.66rem;
  letter-spacing: 0.18em;
  color: var(--text-faint);
}

.foot-identity {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
  letter-spacing: 0;
  min-width: 9rem;
}

.foot-crevision {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  color: #fff;
  font-size: 0.92rem;
  font-weight: 800;
  letter-spacing: -0.045em;
  text-decoration: none;
}

.foot-crevision .brand-period { color: #5ce1e6; }

.foot-crevision img {
  width: 28px;
  height: 30px;
  opacity: 0.96;
  transition: opacity 0.2s var(--ease);
}

.foot-crevision:hover img,
.foot-crevision:focus-visible img { opacity: 1; }

.foot-mail {
  color: var(--text-muted);
  letter-spacing: 0.06em;
  text-transform: none;
  font-size: 0.68rem;
  transition: color 0.2s var(--ease);
}

.foot-mail:hover,
.foot-mail:focus-visible { color: var(--text); }

.foot-legal {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}

.foot-links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem 1.25rem;
}
.foot-links a { color: var(--text-muted); transition: color 0.2s var(--ease); }
.foot-links a:hover { color: var(--accent); }

/* ---------- reveal ---------- */

.js .reveal {
  opacity: 0;
  transform: translateY(22px);
  transition: opacity 0.75s var(--ease), transform 0.75s var(--ease);
}

.reveal.is-visible {
  opacity: 1;
  transform: none;
}

/* ---------- responsive ---------- */

@media (min-width: 720px) {
  .format-art { display: flex; }
  .format-card { grid-template-columns: auto auto 1fr; }
}

@media (min-width: 900px) {
  .company-section { grid-template-columns: 0.8fr 1.2fr; align-items: start; }
  .tech-heading { max-width: 34ch; }
}

@media (max-width: 720px) {
  .hype-hint { display: none; }
  .stage-live { display: none; }
  .stage-tab { padding: 0.5rem 0.7rem; letter-spacing: 0.08em; }
}

@media (max-width: 560px) {
  .site-header { flex-wrap: wrap; gap: 0.75rem 1rem; }
  .company { display: none; }
  .brand img.brand-teapot { display: none; }
  .brand img.brand-trecillo { height: 22px; max-width: min(132px, 46vw); }
  .brand img.brand-zuku { width: 24px; height: 24px; }
  .site-header nav { width: 100%; justify-content: space-between; }
  footer { flex-direction: column; align-items: flex-start; }
  .stage-frame,
  .stage-panel { min-height: 420px; }
}

@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;
  }
  .js .reveal,
  .hero-in { opacity: 1; transform: none; animation: none; }
  .field { display: none; }
}

/* ---------- inner pages ---------- */

.crumb {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.18em;
  color: var(--text-faint);
  margin-bottom: 1.4rem;
}
.crumb a { color: var(--text-muted); }
.crumb a:hover { color: var(--accent); }

.page-hero {
  position: relative;
  padding-block: clamp(3rem, 9vh, 6rem) 2.2rem;
}
.page-hero h1 {
  font-size: clamp(2.6rem, 8vw, 5.6rem);
  margin-bottom: 1.4rem;
}
.page-hero h1 em {
  font-style: normal;
  background: linear-gradient(120deg, var(--brand-bright), var(--accent) 50%, var(--purple));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.page-hero .hero-copy { margin-bottom: 2rem; }
.page-hero .hero-actions { margin-bottom: 0; }

.page-stage {
  padding-block: 0 clamp(3rem, 8vh, 5rem);
}
.page-stage .stage { margin-top: 0; }

.prose {
  max-width: 66ch;
  color: var(--text-muted);
  font-size: 1.02rem;
}
.prose p + p { margin-top: 1rem; }
.prose strong { color: var(--text); font-weight: 650; }

.facts {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  max-width: var(--maxw);
  width: calc(100% - 2 * var(--pad));
  margin: 0 auto clamp(3rem, 8vh, 5rem);
  box-sizing: border-box;
}
.facts:has(> :nth-child(3):last-child) {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}
.facts:has(> :nth-child(5)) {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}
.facts article {
  padding: 1.4rem 1.5rem;
  background: var(--bg);
}
.facts dt,
.facts .tag {
  font-family: var(--font-mono);
  font-size: 0.64rem;
  letter-spacing: 0.2em;
  color: var(--accent);
  margin-bottom: 0.55rem;
  text-transform: uppercase;
}
.facts h3 { font-size: 1.05rem; margin-bottom: 0.45rem; }
.facts p { color: var(--text-muted); font-size: 0.92rem; }

.surface-map {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 0.9rem;
  padding-block: 0.5rem clamp(3rem, 8vh, 5rem);
}
.surface-map a {
  display: block;
  padding: 1.4rem 1.5rem;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--bg-raised);
  transition: border-color 0.3s var(--ease), transform 0.3s var(--ease);
}
.surface-map a:hover {
  transform: translateY(-3px);
  border-color: color-mix(in srgb, var(--accent) 45%, var(--line));
}
.surface-map .tag { margin-bottom: 0.5rem; color: var(--accent); }
.surface-map h3 {
  font-family: var(--font-display);
  font-size: 1.35rem;
  margin-bottom: 0.4rem;
}
.surface-map p { color: var(--text-muted); font-size: 0.9rem; }
.surface-map.compact a { padding: 1.1rem 1.2rem; }

.dl-block,
.meters,
.boundary,
.vive-read,
.wave-wrap,
.wave-hint,
.preset-row,
.aist-preview,
.pager {
  max-width: var(--maxw);
  margin-left: auto;
  margin-right: auto;
  padding-inline: var(--pad);
  width: 100%;
  box-sizing: border-box;
}

.pager {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  padding-block: 1rem clamp(4rem, 10vh, 6rem);
  border-top: 1px solid var(--line);
}
.pager a {
  display: grid;
  gap: 0.25rem;
  min-width: 0;
}
.pager a.nxt { text-align: right; margin-left: auto; }
.pager span {
  font-family: var(--font-mono);
  font-size: 0.62rem;
  letter-spacing: 0.18em;
  color: var(--text-faint);
}
.pager strong {
  font-family: var(--font-display);
  font-size: 1.15rem;
}

.dl-block {
  margin: 0 0 clamp(3rem, 8vh, 5rem);
  border-top: 1px solid var(--line);
}
.dl-block > div {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  justify-content: space-between;
  padding: 0.95rem 0;
  border-bottom: 1px solid var(--line);
}
.dl-block dt {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.2em;
  color: var(--text-faint);
  text-transform: uppercase;
}
.dl-block dd { margin: 0; }
.dl-block a { color: var(--brand-bright); }

.meters { display: grid; gap: 1.1rem; margin-bottom: clamp(3rem, 8vh, 5rem); }
.meter {
  padding: 1.1rem 1.2rem;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: var(--bg-raised);
}
.meter-head {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.12em;
  margin-bottom: 0.7rem;
}
.meter-track {
  position: relative;
  height: 10px;
  border-radius: 99px;
  background: var(--line);
  cursor: ew-resize;
}
.meter-cap {
  position: absolute;
  inset: 0 auto 0 0;
  width: 2px;
  background: var(--accent);
  opacity: 0.85;
}
.meter-fill {
  height: 100%;
  width: 70%;
  border-radius: 99px;
  background: linear-gradient(90deg, var(--brand-deep), var(--accent));
  pointer-events: none;
}
.meter-note {
  margin-top: 0.55rem;
  font-size: 0.82rem;
  color: var(--text-faint);
}
.meter.is-clamped .meter-note { color: var(--accent); }

.boundary {
  display: grid;
  grid-template-columns: 1fr 1.4fr;
  min-height: min(48vh, 420px);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  margin-bottom: clamp(3rem, 8vh, 5rem);
}
.boundary-out,
.boundary-in {
  padding: 1.6rem;
  cursor: pointer;
}
.boundary-out {
  background: #07070c;
  color: var(--text-faint);
}
.boundary-in {
  background:
    radial-gradient(80% 80% at 50% 50%, color-mix(in srgb, var(--accent) 16%, transparent), transparent 70%),
    var(--bg-raised);
  border-left: 2px solid var(--accent);
}
.boundary h3 { font-size: 1.05rem; margin: 0.8rem 0 0.4rem; }
.boundary.is-in .boundary-in,
.boundary.is-out .boundary-out { outline: 1px solid color-mix(in srgb, var(--accent) 40%, transparent); }

.feed {
  display: grid;
  gap: 0.85rem;
  margin-bottom: clamp(3rem, 8vh, 5rem);
}
.stem {
  padding: 1.15rem 1.25rem;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: var(--bg-raised);
  cursor: pointer;
  transition: border-color 0.25s var(--ease);
}
.stem:hover { border-color: color-mix(in srgb, var(--accent) 40%, var(--line)); }
.stem .meta {
  font-family: var(--font-mono);
  font-size: 0.64rem;
  letter-spacing: 0.16em;
  color: var(--text-faint);
  margin-bottom: 0.4rem;
}
.stem h3 { font-size: 1.05rem; margin-bottom: 0.3rem; }
.stem p { color: var(--text-muted); font-size: 0.9rem; }
.stem .preview {
  margin-top: 0.8rem;
  height: 0;
  overflow: hidden;
  border-radius: 10px;
  background: linear-gradient(120deg, color-mix(in srgb, var(--accent) 25%, #111), #12121a);
  transition: height 0.35s var(--ease);
}
.stem.is-open .preview { height: 110px; }

.vive-read {
  padding: clamp(1.6rem, 4vw, 2.6rem);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: linear-gradient(180deg, #14120c, #0c0b09);
  margin-bottom: clamp(3rem, 8vh, 5rem);
}
.vive-read h2 {
  font-family: var(--font-display);
  font-size: clamp(1.6rem, 3vw, 2.2rem);
  margin-bottom: 1.1rem;
  color: #f3e6c4;
}
.vive-read p {
  color: #d9d0b8;
  font-size: 1.08rem;
  line-height: 1.9;
  max-width: 48ch;
}
.vive-read p + p { margin-top: 1rem; }

.wave-wrap {
  position: relative;
  height: min(42vh, 360px);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  background: #08080e;
  margin-bottom: 1rem;
}
#vine-wave { display: block; width: 100%; height: 100%; }
.wave-hint {
  text-align: center;
  font-family: var(--font-mono);
  font-size: 0.64rem;
  letter-spacing: 0.16em;
  color: var(--text-faint);
  margin-bottom: clamp(3rem, 8vh, 5rem);
}

.preset-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 1rem;
}
.preset-row button {
  appearance: none;
  border: 1px solid var(--line-strong);
  background: transparent;
  color: var(--text);
  border-radius: 999px;
  padding: 0.45rem 0.95rem;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  cursor: pointer;
}
.preset-row button.is-on {
  border-color: var(--accent);
  background: color-mix(in srgb, var(--accent) 16%, transparent);
}
.aist-preview {
  min-height: min(42vh, 360px);
  border-radius: var(--radius);
  border: 1px solid var(--line);
  display: grid;
  place-content: center;
  text-align: center;
  gap: 0.4rem;
  margin-bottom: clamp(3rem, 8vh, 5rem);
  background:
    radial-gradient(50% 60% at 50% 40%, color-mix(in srgb, var(--accent) 22%, transparent), transparent 70%),
    #09090f;
}
.aist-preview strong {
  font-family: var(--font-display);
  font-size: clamp(1.8rem, 4vw, 2.6rem);
}
.aist-preview span { color: var(--text-muted); font-family: var(--font-mono); font-size: 0.72rem; letter-spacing: 0.14em; }

.pipeline {
  display: grid;
  gap: 0.7rem;
  margin-bottom: clamp(3rem, 8vh, 5rem);
}
.pipe-step {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 1rem;
  align-items: start;
  padding: 1rem 1.1rem;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: var(--bg-raised);
  cursor: pointer;
}
.pipe-step.is-on { border-color: color-mix(in srgb, var(--jump) 50%, var(--line)); }
.pipe-num {
  font-family: var(--font-mono);
  color: var(--jump);
  font-size: 0.85rem;
}
.pipe-step h3 { font-size: 1rem; margin-bottom: 0.25rem; }
.pipe-step p { color: var(--text-muted); font-size: 0.9rem; display: none; }
.pipe-step.is-on p { display: block; }

.copy-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  justify-content: center;
  align-items: center;
}

@media (max-width: 900px) {
  .facts:has(> :nth-child(3):last-child),
  .facts:has(> :nth-child(5)) {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .surface-map {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 720px) {
  .boundary { grid-template-columns: 1fr; min-height: auto; }
  .boundary-in { border-left: 0; border-top: 2px solid var(--accent); }
  .page-hero h1,
  .hero h1 {
    font-size: clamp(2.2rem, 11vw, 3.4rem);
    word-break: keep-all;
  }
  .hero-copy,
  .page-hero .hero-copy {
    font-size: 1rem;
    max-width: 38ch;
  }
  .stage-frame,
  .stage-panel {
    min-height: min(62vh, 480px);
  }
  .swipe-phone {
    width: min(100%, 280px);
    max-width: 86vw;
  }
  .jump-wrap,
  #jump-canvas {
    width: 100%;
    max-width: 100%;
  }
  #jump-canvas {
    height: auto;
    max-height: min(42vh, 320px);
  }
  .pager {
    flex-direction: column;
    gap: 0.85rem;
  }
  .pager a.nxt { text-align: left; margin-left: 0; }
  .preset-row button,
  .button,
  .nav-cta,
  .icon-btn,
  .stage-tab {
    min-height: 44px;
  }
  .facts,
  .surface-map {
    grid-template-columns: 1fr;
  }
  .dl-block > div {
    flex-direction: column;
    gap: 0.35rem;
  }
  .copy-row {
    flex-direction: column;
  }
  .contact-link {
    font-size: clamp(1.35rem, 7vw, 2rem);
    word-break: break-all;
  }
}

@media (max-width: 560px) {
  .site-header {
    flex-wrap: wrap;
    gap: 0.75rem 1rem;
    padding-block: 0.85rem;
  }
  .company { display: none; }
  .brand img.brand-teapot { display: none; }
  .brand img.brand-trecillo { height: 22px; max-width: min(132px, 46vw); }
  .brand img.brand-zuku { width: 24px; height: 24px; }
  .site-header nav {
    width: 100%;
    justify-content: flex-start;
    flex-wrap: wrap;
    gap: 0.55rem 0.9rem;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
  }
  .site-header nav a {
    flex: 0 0 auto;
    padding-block: 0.35rem;
  }
  footer { flex-direction: column; gap: 0.85rem; }
  .stage-frame,
  .stage-panel { min-height: min(58vh, 420px); }
  .stage-tabs {
    width: 100%;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
  }
  .aist-preview,
  .wave-wrap {
    min-height: min(36vh, 280px);
    height: auto;
  }
}