html.case-intro-open, html.case-intro-open body { overflow: hidden; }
.case-intro { --intro-accent: #dbc293; --intro-light: #dfcd8038; position: fixed; inset: 0; width: 100vw; max-width: none; height: 100dvh; max-height: none; margin: 0; padding: 0; overflow: hidden; border: 0; background: #0b100d; color: #eee6d4; font-family: var(--sans, sans-serif); }
.case-intro[data-case-id="case-001"] { --intro-accent: #dbc6a0; --intro-light: #d0b88238; }
.case-intro[data-case-id="case-002"] { --intro-accent: #bad4d4; --intro-light: #9bcad638; }
.case-intro[data-case-id="case-003"] { --intro-accent: #ddb09d; --intro-light: #ca867038; }
.case-intro::backdrop { background: #080c09; }
.case-intro .intro-accessible { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip-path: inset(50%); white-space: nowrap; }
.intro-film, .intro-image, .intro-image img, .intro-shade, .intro-light, .intro-frame { position: absolute; inset: 0; width: 100%; height: 100%; pointer-events: none; }
.intro-image { transform-origin: 50% 55%; animation: intro-camera 10s ease-out both; }
.intro-image img { object-fit: cover; object-position: 50% 55%; filter: saturate(.5) brightness(.65); }
.intro-shade { background: linear-gradient(180deg, #080d0bd9 0, #0a100c30 25%, #0a100c45 55%, #080d0bf5 100%), linear-gradient(90deg, #080d0b96, transparent 55%, #080d0b65); }
.intro-light { background: radial-gradient(ellipse at 58% 34%, var(--intro-light), transparent 45%); mix-blend-mode: screen; animation: intro-lamp 8s ease-in-out both; }
.intro-frame { border-block: clamp(30px, 5vh, 56px) solid #080c09a8; box-shadow: inset 0 0 170px #050805a8; }
.intro-header, .intro-footer { position: absolute; z-index: 2; left: clamp(20px, 4.5vw, 72px); right: clamp(20px, 4.5vw, 72px); display: flex; justify-content: space-between; align-items: center; gap: 20px; }
.intro-header { top: max(22px, env(safe-area-inset-top)); }
.intro-brand { display: flex; align-items: center; gap: 10px; }
.intro-brand strong { color: #e2ddcc; font: 700 13px/1.5 var(--sans, sans-serif); letter-spacing: .17em; }
.intro-brand small { margin-left: 15px; padding-left: 23px; border-left: 1px solid #e0d7ba30; color: #b0b49e; font: 9px/1.5 var(--mono, monospace); letter-spacing: .1em; }
.intro-controls { display: flex; align-items: center; gap: 9px; }
.case-intro button { display: inline-flex; justify-content: center; align-items: center; gap: 15px; min-height: 44px; padding: 11px 17px; border: 1px solid #dfd4b42e; border-radius: 5px; background: #0b110db3; color: #d9dccb; font: 12px/1.5 var(--sans, sans-serif); cursor: pointer; }
.case-intro button:hover { border-color: #c7ac75; background: #252d1fcc; }
.case-intro button:focus-visible, .intro-replay:focus-visible { outline: 2px solid #d7bf8b; outline-offset: 4px; }
.case-intro button[hidden], .intro-scene[hidden] { display: none; }
.intro-sound[aria-pressed="true"] { color: #ddc78e; }
.intro-scenes { position: absolute; z-index: 1; inset: 110px clamp(24px, 9vw, 145px) 130px; display: grid; align-items: center; }
.intro-scene { width: 100%; animation: intro-reveal 1.2s ease-out both; }
.intro-eyebrow { margin: 0 0 27px; color: #c6c9b1; font: 10px/1.7 var(--mono, monospace); letter-spacing: .2em; }
.intro-clock { margin: 0; color: #ede4cf; font: 400 clamp(80px, 10vw, 144px)/1 Georgia, serif; letter-spacing: -.04em; }
.intro-clock span { color: var(--intro-accent); }
.intro-whisper { margin: 25px 0 0; color: #c3c8b3; font: 14px/1.8 var(--sans, sans-serif); letter-spacing: .06em; }
.intro-message h2 { margin: 0; max-width: 1050px; color: #f0e8d6; font: 400 clamp(38px, 5.2vw, 76px)/1.19 Georgia, serif; letter-spacing: -.035em; text-wrap: balance; text-shadow: 0 3px 30px #0008; }
.intro-message h2 em { color: var(--intro-accent); font-weight: 400; }
.intro-mobile-break { display: none; }
.intro-rule { display: block; width: 52px; height: 1px; margin-top: 33px; background: var(--intro-accent); }
.intro-title h2 { margin: 0; color: #eee6d5; font: 400 clamp(72px, 10vw, 150px)/1.05 Georgia, serif; letter-spacing: -.055em; text-shadow: 0 3px 30px #0008; }
.intro-title h2 em { color: var(--intro-accent); font-weight: 400; }
.intro-title h2 > span { color: #b97b60; }
.intro-footer { bottom: max(30px, env(safe-area-inset-bottom)); min-height: 48px; }
.intro-timeline { flex: 0 1 260px; }
.intro-timeline > span { display: block; margin-bottom: 13px; color: #b9bfaa; font: 9px/1.5 var(--mono, monospace); letter-spacing: .12em; }
.intro-timeline > span i { padding-inline: 8px; color: #c7b78b; font-style: normal; }
.intro-progress { height: 1px; background: #dfd3b52e; overflow: hidden; }
.intro-progress i { display: block; height: 100%; width: 100%; background: var(--intro-accent); transform-origin: left; animation: intro-progress 10s linear both; }
.case-intro .intro-enter { min-width: 160px; background: #e0d2ac; color: #303a27; border-color: #e0d2ac; }
.case-intro .intro-enter:hover { background: #eee0bd; }
.intro-replay { display: inline-flex; align-items: center; gap: 8px; min-height: 44px; margin-top: 14px; padding: 7px 0; border: 0; background: none; color: #78795d; font: 12px/1.5 var(--sans, sans-serif); text-decoration: underline; text-underline-offset: 4px; cursor: pointer; }
.intro-replay:hover { color: #41492e; }
.intro-replay.intro-replay-classic { color: #c1b085; margin: 0 0 16px; }
@keyframes intro-camera { from { transform: scale(1.02); } to { transform: scale(1.12) translateY(-1%); } }
@keyframes intro-lamp { 0%, 100% { opacity: .35; } 25%, 65% { opacity: .7; } 40% { opacity: .45; } }
@keyframes intro-reveal { from { opacity: 0; transform: translateY(12px); } to { opacity: 1; transform: none; } }
@keyframes intro-progress { from { transform: scaleX(0); } to { transform: scaleX(1); } }
@media (max-width: 600px) {
  .intro-header { left: 16px; right: 16px; top: max(16px, env(safe-area-inset-top)); gap: 10px; }
  .intro-brand { gap: 7px; }
  .intro-brand small { display: none; }
  .intro-brand strong { font-size: 11px; }
  .intro-brand img { width: 24px; height: 24px; }
  .intro-controls { gap: 6px; }
  .case-intro button { padding-inline: 12px; font-size: 11px; gap: 10px; }
  .intro-scenes { inset: 105px 24px 150px; }
  .intro-eyebrow { max-width: 260px; font-size: 9px; letter-spacing: .14em; margin-bottom: 24px; }
  .intro-message h2 { font-size: clamp(33px, 8.9vw, 50px); line-height: 1.25; }
  .intro-mobile-break { display: block; }
  .intro-title h2 { font-size: clamp(60px, 16vw, 90px); }
  .intro-whisper { font-size: 12px; letter-spacing: .025em; }
  .intro-footer { left: 24px; right: 24px; gap: 18px; bottom: max(28px, env(safe-area-inset-bottom)); flex-wrap: wrap; }
  .intro-timeline { flex-basis: 100%; }
  .case-intro .intro-enter { width: 100%; min-height: 46px; justify-content: space-between; }
}
@media (max-height: 480px) and (min-width: 601px) {
  .intro-header { top: 12px; }
  .intro-scenes { top: 76px; bottom: 84px; }
  .intro-eyebrow { margin-bottom: 12px; }
  .intro-clock, .intro-title h2 { font-size: 64px; }
  .intro-message h2 { font-size: 36px; }
  .intro-whisper { margin-top: 12px; }
  .intro-rule { margin-top: 16px; }
  .intro-footer { bottom: 18px; }
}
@media (prefers-reduced-motion: reduce) {
  .case-intro *, .case-intro *::before, .case-intro *::after { animation: none !important; transition: none !important; }
  .case-intro .intro-progress { display: none; }
}