/* Hallmark · genre: atmospheric · macrostructure: Marquee Hero → timed stage (single-screen experience)
 * theme: "Ivory Hotel" + dusk tone · anchor hue: 58° brass · enrichment: generated light textures + WebGL ink-particle field
 * nav: N9 edge-aligned HUD · footer: none (hands off to details.html)
 */

*, *::before, *::after { box-sizing: border-box; }
html, body { height: 100%; }
html { background: var(--color-paper); overflow: clip; -webkit-text-size-adjust: 100%; text-size-adjust: 100%; }
body {
  margin: 0; overflow: clip; background: var(--color-paper); color: var(--fg);
  font-family: var(--font-body); -webkit-font-smoothing: antialiased; -moz-osx-font-smoothing: grayscale;
  /* stage colours — flipped by data-tone="dusk" */
  --fg: var(--color-ink); --fg-2: var(--color-ink-2); --fg-3: var(--color-muted);
  --line: var(--color-rule-firm); --line-soft: oklch(80% 0.012 80); --mark: var(--color-accent);
  --halo: oklch(96.8% 0.008 85 / 0.9);
  transition: color 1s var(--ease-in-out);
}
body[data-tone="dusk"] {
  --fg: var(--color-paper); --fg-2: oklch(90% 0.02 78); --fg-3: var(--color-paper-muted);
  --line: oklch(80% 0.03 70 / 0.7); --line-soft: oklch(80% 0.03 70 / 0.35); --mark: var(--color-accent-invert);
  --halo: oklch(30% 0.03 50 / 0.55);
}
p, h1, ol { margin: 0; padding: 0; }
ol { list-style: none; }
button { font: inherit; color: inherit; background: none; border: 0; padding: 0; cursor: pointer; -webkit-tap-highlight-color: transparent; }
a { color: inherit; text-decoration: none; }
:focus-visible { outline: 2px solid var(--color-focus); outline-offset: 3px; }
body[data-tone="dusk"] :focus-visible { outline-color: var(--color-focus-invert); }
.sr { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }

/* ---------- layered stage: generated light → ivory wash → particles → grain ---------- */
.bg { position: fixed; inset: 0; z-index: 0; overflow: hidden; background: var(--color-paper-2); }
.bg-layer {
  position: absolute; inset: -4%; background-size: cover; background-position: center;
  opacity: 0; transition: opacity 1.2s var(--ease-in-out);
  animation: drift 38s var(--ease-in-out) infinite alternate;
}
.bg-layer.on { opacity: 1; }
@keyframes drift { from { transform: scale(1.02) translate3d(-0.8%, 0.4%, 0); } to { transform: scale(1.09) translate3d(0.8%, -0.6%, 0); } }

.wash {
  position: fixed; inset: 0; z-index: 1; pointer-events: none;
  background:
    radial-gradient(120% 80% at 50% 50%, oklch(96.8% 0.008 85 / 0.82), oklch(96.8% 0.008 85 / 0.35) 70%),
    linear-gradient(oklch(96.8% 0.008 85 / 0.25), oklch(96.8% 0.008 85 / 0.55));
  opacity: 0.55; transition: opacity 1.1s var(--ease-in-out);
}
body[data-phase="intro"] .wash { opacity: 0.35; }
body[data-phase="text"] .wash { opacity: 0.85; }
body[data-phase="play"] .wash { opacity: 0.4; }

/* a soft floor of light behind the captions and controls */
.wash::after {
  content: ""; position: absolute; inset: auto 0 0 0; height: 42vh;
  background: linear-gradient(transparent, oklch(96.8% 0.008 85 / 0.75));
}
body[data-tone="dusk"] .wash::after { background: linear-gradient(transparent, oklch(28% 0.03 45 / 0.5)); }
body[data-tone="dusk"][data-phase] .wash { opacity: 0.5; }
body[data-tone="dusk"] .wash { background: none; }
body[data-scene="trendy"][data-phase="play"] .wash { opacity: 0.75; }

#gl { position: fixed; inset: 0; width: 100%; height: 100%; display: block; z-index: 2; }
.no-gl #gl { display: none; }

.grain {
  position: fixed; inset: 0; z-index: 3; pointer-events: none; opacity: 0.16; mix-blend-mode: multiply;
  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='.9' numOctaves='2' stitchTiles='stitch'/%3E%3CfeColorMatrix values='0 0 0 0 .45 0 0 0 0 .38 0 0 0 0 .3 0 0 0 .55 0'/%3E%3C/filter%3E%3Crect width='160' height='160' filter='url(%23n)'/%3E%3C/svg%3E");
}

/* ---------- HUD ---------- */
.hud-top {
  position: fixed; inset: 0 0 auto 0; z-index: 20;
  display: grid; grid-template-columns: 1fr auto 1fr; align-items: center; gap: var(--space-md);
  padding: calc(env(safe-area-inset-top, 0px) + var(--space-md)) var(--gutter) var(--space-md);
  font-size: var(--text-2xs); font-weight: 500; letter-spacing: var(--tracking-label); text-transform: uppercase; color: var(--fg-3);
  transition: color 1s var(--ease-in-out);
}
.brand { color: var(--fg-2); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.brand .wm { font-family: var(--font-display); font-weight: 700; font-size: var(--text-sm); letter-spacing: -0.01em; text-transform: none; color: var(--fg); margin-right: var(--space-xs); }
.hud-chapter { justify-self: center; white-space: nowrap; overflow: hidden; color: var(--fg-2); transition: opacity var(--dur-mid) var(--ease-out); }
.hud-chapter span { display: inline-block; transition: opacity var(--dur-mid) var(--ease-out), transform var(--dur-mid) var(--ease-out); }
.hud-chapter span.swap { opacity: 0; transform: translateY(40%); }
.skip {
  justify-self: end; white-space: nowrap; padding: var(--space-xs) 0; border-bottom: 1px solid var(--line);
  color: var(--fg-2); transition: color var(--dur-fast) var(--ease-out), border-color var(--dur-fast) var(--ease-out);
}
.skip:hover { color: var(--mark); border-color: var(--mark); }

/* ---------- intro ---------- */
.intro {
  position: fixed; inset: 0; z-index: 10; display: flex; flex-direction: column; justify-content: flex-end;
  padding: 0 var(--gutter) calc(env(safe-area-inset-bottom, 0px) + clamp(2.5rem, 9vh, 6rem));
  transition: opacity 900ms var(--ease-out), transform 1200ms var(--ease-out);
}
body:not(.is-intro) .intro { opacity: 0; transform: translateY(-3vh); pointer-events: none; visibility: hidden; transition: opacity 900ms var(--ease-out), transform 1200ms var(--ease-out), visibility 0s 900ms; }
.intro-k { font-size: var(--text-xs); font-weight: 500; letter-spacing: var(--tracking-label); text-transform: uppercase; color: var(--fg-2); margin-bottom: var(--space-lg); }
.intro-k .sep { color: var(--mark); margin: 0 0.4em; }
.intro-h {
  font-family: var(--font-display); font-weight: 500;
  font-size: clamp(3rem, 9.6vw, 10rem); line-height: 0.92; letter-spacing: -0.045em; min-width: 0; max-width: 11ch;
  text-wrap: balance;
}
.intro-play { display: flex; align-items: center; gap: var(--space-xl); margin-top: clamp(2rem, 6vh, 4rem); }
.play {
  position: relative; flex: none; width: 96px; height: 96px; border-radius: 50%; display: grid; place-items: center;
  background: var(--color-ink); color: var(--color-paper);
  transition: background-color var(--dur-fast) var(--ease-out), color var(--dur-fast) var(--ease-out), transform var(--dur-fast) var(--ease-out), opacity var(--dur-mid) var(--ease-out);
}
.play svg { width: 30px; height: 30px; fill: currentColor; transform: translateX(2px); }
.play-ring { position: absolute; inset: -12px; border-radius: 50%; border: 1px solid var(--line); transition: border-color var(--dur-mid) var(--ease-out); }
.play:not(:disabled) .play-ring { border-color: var(--mark); animation: breathe 3.2s var(--ease-in-out) infinite; }
.play:hover:not(:disabled) { background: var(--color-accent); color: var(--color-accent-ink); }
.play:active:not(:disabled) { transform: scale(0.96); }
.play:disabled { opacity: 0.45; cursor: progress; }
@keyframes breathe { 50% { transform: scale(1.1); opacity: 0.35; } }
.intro-lbl { font-family: var(--font-display); font-weight: 500; font-size: var(--text-xl); letter-spacing: -0.02em; line-height: 1.1; }
.intro-sub { margin-top: var(--space-xs); font-size: var(--text-2xs); font-weight: 500; letter-spacing: 0.14em; text-transform: uppercase; color: var(--fg-3); }

/* ---------- stage text ---------- */
.stage-text {
  position: fixed; inset: 0; z-index: 8; display: grid; place-items: center; text-align: center;
  padding: 0 var(--gutter); pointer-events: none;
}
.st-block { grid-area: 1 / 1; display: grid; justify-items: center; gap: var(--space-xs); width: min(100%, 64rem); }
.st-sub { font-size: var(--text-xs); font-weight: 500; letter-spacing: var(--tracking-label); text-transform: uppercase; color: var(--mark); margin-bottom: var(--space-sm); }
.st-line {
  font-family: var(--font-display); font-weight: 500;
  font-size: clamp(1.9rem, 5.4vw, 5.25rem); line-height: 1.02; letter-spacing: -0.035em;
  max-width: 17ch; text-wrap: balance;
  text-shadow: 0 0 30px var(--halo), 0 0 70px var(--halo);
}
.st-line + .st-line { color: var(--fg-2); }
.st-line .w { display: inline-block; opacity: 0; filter: blur(10px); transform: translateY(0.25em);
  transition: opacity 650ms var(--ease-out), filter 650ms var(--ease-out), transform 650ms var(--ease-out);
  transition-delay: calc(var(--i) * 50ms + var(--d, 0ms)); }
.st-block.in .w { opacity: 1; filter: blur(0); transform: none; }
.st-block.out { opacity: 0; filter: blur(8px); transform: translateY(-0.4em); transition: opacity 400ms var(--ease-in), filter 400ms var(--ease-in), transform 400ms var(--ease-in); }
.st-block.out .w { transition-delay: 0ms; }

/* ---------- caption (while music plays) ---------- */
.caption {
  position: fixed; left: var(--gutter); bottom: calc(env(safe-area-inset-bottom, 0px) + 6.5rem); z-index: 12; max-width: min(34rem, 70vw);
  opacity: 0; transform: translateY(10px); transition: opacity 450ms var(--ease-out), transform 450ms var(--ease-out);
  text-shadow: 0 0 24px var(--halo);
}
.caption.on { opacity: 1; transform: none; }
.caption, .meters { pointer-events: none; }
.cap-k { font-size: var(--text-2xs); font-weight: 500; letter-spacing: var(--tracking-label); text-transform: uppercase; color: var(--mark); }
.cap-t { margin-top: var(--space-xs); font-family: var(--font-display); font-weight: 500; font-size: var(--text-xl); letter-spacing: -0.025em; line-height: 1.08; }
.cap-n { margin-top: var(--space-sm); display: inline-block; font-size: 0.625rem; font-weight: 500; letter-spacing: 0.14em; text-transform: uppercase; color: var(--fg-3); padding: 3px 8px; border: 1px solid var(--line-soft); border-radius: var(--radius-pill); }

.st-label, .cap-l { font-size: var(--text-xs); font-weight: 500; letter-spacing: 0.08em; text-transform: uppercase; }
.st-label {
  margin-top: var(--space-md); padding: 6px 14px; border-radius: var(--radius-pill);
  border: 1px solid var(--line); color: var(--fg); background: oklch(96.8% 0.008 85 / 0.35);
  opacity: 0; transform: translateY(6px); transition: opacity 500ms var(--ease-out) 250ms, transform 500ms var(--ease-out) 250ms;
}
body[data-tone="dusk"] .st-label { background: oklch(30% 0.03 50 / 0.3); }
.st-block.in .st-label { opacity: 1; transform: none; }
.cap-l { margin-top: var(--space-sm); color: var(--fg); }
.cap-for { color: var(--mark); margin-right: 0.3em; }

/* ---------- phone (Trendy Social) ---------- */
.phone {
  position: fixed; z-index: 7; left: 50%; top: 50%;
  height: min(66vh, 600px); aspect-ratio: 9 / 16; transform: translate(-50%, -48%) scale(0.94);
  border-radius: 34px; padding: 9px; background: var(--color-ink);
  box-shadow: 0 30px 80px -30px oklch(25% 0.03 60 / 0.6), inset 0 0 0 1px oklch(40% 0.02 60);
  opacity: 0; pointer-events: none; transition: opacity 500ms var(--ease-out), transform 600ms var(--ease-out);
}
body[data-scene="trendy"][data-phase="play"] .phone { opacity: 1; transform: translate(-50%, -50%) scale(1); }
.phone-screen { position: relative; width: 100%; height: 100%; border-radius: 26px; overflow: hidden; background: var(--color-ink-2); }
.ph-cuts i { position: absolute; inset: -6%; background-size: cover; background-position: center; opacity: 0; transform: scale(1.12); }
.ph-cuts i.on { opacity: 1; animation: punch 900ms var(--ease-out) both; }
@keyframes punch { from { transform: scale(1.22); } to { transform: scale(1.08); } }
.phone-screen::after { content: ""; position: absolute; inset: 0; background: linear-gradient(transparent 55%, oklch(15% 0.01 60 / 0.65)); }
.ph-progress { position: absolute; z-index: 2; top: 12px; left: 12px; right: 12px; height: 3px; border-radius: 2px; background: oklch(100% 0 0 / 0.35); overflow: hidden; }
.ph-progress i { position: absolute; inset: 0; background: oklch(100% 0 0 / 0.95); transform-origin: left; transform: scaleX(var(--p, 0)); }
.ph-caps { position: absolute; z-index: 2; left: 0; right: 0; top: 38%; display: grid; place-items: center; padding: 0 12%; text-align: center; }
.ph-caps span {
  font-family: var(--font-display); font-weight: 700; font-size: clamp(1.1rem, 2.6vh, 1.6rem); line-height: 1.1; letter-spacing: -0.01em;
  color: var(--color-ink); background: var(--color-paper); padding: 6px 12px; border-radius: 8px;
  animation: pop 420ms cubic-bezier(0.34, 1.56, 0.64, 1) both;
}
@keyframes pop { from { transform: scale(0.6) rotate(-3deg); opacity: 0; } to { transform: none; opacity: 1; } }
.ph-side { position: absolute; z-index: 2; right: 12px; bottom: 76px; display: grid; gap: 16px; }
.ph-ic { width: 26px; height: 26px; display: block; background: oklch(100% 0 0 / 0.92);
  -webkit-mask: var(--m) center / contain no-repeat; mask: var(--m) center / contain no-repeat; }
.ph-heart { --m: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24'%3E%3Cpath d='M12 21s-7.5-4.6-9.6-9.2C.8 8.3 3 4.5 6.7 4.5c2 0 3.6 1.1 5.3 3 1.7-1.9 3.3-3 5.3-3 3.7 0 5.9 3.8 4.3 7.3C19.5 16.4 12 21 12 21Z'/%3E%3C/svg%3E"); }
.ph-bubble { --m: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24'%3E%3Cpath d='M12 3c5 0 9 3.6 9 8s-4 8-9 8c-1.2 0-2.4-.2-3.4-.6L3 20l1.5-4.3C3.6 14.4 3 12.8 3 11c0-4.4 4-8 9-8Z'/%3E%3C/svg%3E"); }
.ph-send { --m: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24'%3E%3Cpath d='M21 3 3 10.5l7 2.5 2.5 7L21 3Z'/%3E%3C/svg%3E"); }
.ph-audio { position: absolute; z-index: 2; left: 14px; right: 50px; bottom: 18px; color: oklch(100% 0 0 / 0.95); font-size: 0.75rem; font-weight: 500; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.ph-note { display: inline-block; animation: spin 2.4s linear infinite; }
@keyframes spin { to { transform: rotate(360deg); } }
body[data-scene="trendy"][data-phase="play"] .caption { max-width: min(22rem, calc(50vw - 12rem)); }

/* ---------- meters ---------- */
.meters {
  position: fixed; right: var(--gutter); bottom: calc(env(safe-area-inset-bottom, 0px) + 6.5rem); z-index: 12;
  display: flex; gap: var(--space-md); align-items: flex-end;
  opacity: 0; transition: opacity 700ms var(--ease-out);
}
body.is-running .meters { opacity: 1; }
.m { display: flex; flex-direction: column; align-items: center; gap: var(--space-xs); }
.m-bar { position: relative; width: 3px; height: 56px; background: var(--line-soft); border-radius: 2px; overflow: hidden; }
.m-bar i { position: absolute; inset: 0; background: var(--mark); transform-origin: bottom; transform: scaleY(0); }
.m-l { font-size: 0.625rem; font-weight: 500; letter-spacing: 0.14em; text-transform: uppercase; color: var(--fg-3); }

/* ---------- transport ---------- */
.transport {
  position: fixed; left: 50%; bottom: calc(env(safe-area-inset-bottom, 0px) + var(--space-lg)); z-index: 14;
  display: flex; align-items: center; gap: var(--space-sm);
  width: min(calc(100% - 2 * var(--gutter)), 52rem); transform: translate(-50%, 16px); opacity: 0; pointer-events: none; visibility: hidden;
  transition: opacity 700ms var(--ease-out), transform 700ms var(--ease-out), visibility 0s 700ms;
}
body.is-running .transport { opacity: 1; transform: translate(-50%, 0); pointer-events: auto; visibility: visible; transition: opacity 700ms var(--ease-out), transform 700ms var(--ease-out), visibility 0s; }
.t-btn { flex: none; width: 40px; height: 40px; border-radius: 50%; display: grid; place-items: center; border: 1px solid var(--line); color: var(--fg-2);
  background: oklch(96.8% 0.008 85 / 0.35); backdrop-filter: blur(6px); -webkit-backdrop-filter: blur(6px);
  transition: color var(--dur-fast) var(--ease-out), border-color var(--dur-fast) var(--ease-out), background-color var(--dur-fast) var(--ease-out); }
body[data-tone="dusk"] .t-btn { background: oklch(30% 0.03 50 / 0.25); }
.t-btn svg { width: 16px; height: 16px; fill: currentColor; grid-area: 1 / 1; }
.t-btn:hover { color: var(--fg); border-color: var(--mark); }
.t-next { flex: none; height: 40px; padding: 0 16px; border-radius: var(--radius-pill); border: 1px solid var(--line); color: var(--fg);
  font-size: var(--text-xs); font-weight: 500; letter-spacing: 0.06em; white-space: nowrap;
  background: oklch(96.8% 0.008 85 / 0.35); backdrop-filter: blur(6px); -webkit-backdrop-filter: blur(6px);
  transition: border-color var(--dur-fast) var(--ease-out), background-color var(--dur-fast) var(--ease-out); }
body[data-tone="dusk"] .t-next { background: oklch(30% 0.03 50 / 0.25); }
.t-next:hover { border-color: var(--mark); }
#tPause .i-play { opacity: 0; }
body.is-paused #tPause .i-play { opacity: 1; }
body.is-paused #tPause .i-pause { opacity: 0; }
.chapters { flex: 1; min-width: 0; display: grid; grid-auto-flow: column; grid-auto-columns: minmax(0, 1fr); gap: 6px; }
.ch { min-width: 0; }
.ch button { width: 100%; display: flex; flex-direction: column; gap: 7px; padding: var(--space-xs) 0; text-align: left; }
.ch-bar { display: block; height: 2px; background: var(--line-soft); position: relative; overflow: hidden; border-radius: 1px; }
.ch-bar i { position: absolute; inset: 0; background: var(--mark); transform-origin: left; transform: scaleX(var(--p, 0)); }
.ch-l { font-size: 0.625rem; font-weight: 500; letter-spacing: 0.12em; text-transform: uppercase; color: var(--fg-3); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; transition: color var(--dur-fast) var(--ease-out); }
.ch.is-on .ch-l, .ch button:hover .ch-l { color: var(--fg); }

/* ---------- veil / hand-off ---------- */
.veil { position: fixed; inset: 0; z-index: 30; background: var(--color-paper); opacity: 0; pointer-events: none; transition: opacity 1400ms var(--ease-in-out); }
.veil.on { opacity: 1; pointer-events: auto; }
.noscript { position: fixed; inset: auto var(--gutter) var(--gutter); z-index: 40; color: var(--color-ink-2); }

body.is-intro .hud-chapter { opacity: 0; }

@media (max-width: 720px) {
  .hud-top { grid-template-columns: 1fr auto; }
  .hud-chapter { display: none; }
  .brand .for { display: none; }
  .intro-play { gap: var(--space-lg); }
  .play { width: 80px; height: 80px; }
  .play svg { width: 26px; height: 26px; }
  .caption { bottom: calc(env(safe-area-inset-bottom, 0px) + 6rem); max-width: calc(100% - 2 * var(--gutter) - 5.5rem); }
  .cap-t { font-size: var(--text-lg); }
  .meters { bottom: calc(env(safe-area-inset-bottom, 0px) + 6rem); gap: var(--space-sm); }
  .m-bar { height: 40px; }
  .ch-l { display: none; }
  .ch button { padding: var(--space-md) 0; }
  .phone { height: min(58vh, 520px); top: 46%; }
  body[data-scene="trendy"][data-phase="play"] .caption { max-width: calc(100% - 2 * var(--gutter) - 5.5rem); }
  body[data-scene="trendy"][data-phase="play"] .cap-t { display: none; }
}

@media (prefers-reduced-motion: reduce) {
  .bg-layer { animation: none; transition: opacity 400ms linear; }
  .st-line .w { filter: none; transform: none; transition: opacity 150ms linear; transition-delay: 0ms; }
  .st-block.out { filter: none; transform: none; transition: opacity 150ms linear; }
  .intro, .caption, .transport, .hud-chapter span { transition: opacity 150ms linear; transform: none !important; }
  body.is-running .transport, .transport { transform: translate(-50%, 0) !important; }
  .play-ring { animation: none !important; }
  .ph-cuts i.on, .ph-caps span, .ph-note { animation: none; }
  .veil { transition: opacity 300ms linear; }
}