/* Theatrium scene gallery — swipeable, live-loop cards + lightbox (5 Sep 2026)
   Shared by the home page (#scenes) and /music-visualizer/. Depends on the page's
   own tokens: --bg --panel --ink --muted --faint --line --hair --accent. */

.scenes{overflow:hidden}
.scenes .sec-head{max-width:860px}
.scenes .sec-head .lead{max-width:60ch}

/* filter chips */
.sg-filters{display:flex;gap:8px;overflow-x:auto;scrollbar-width:none;-webkit-overflow-scrolling:touch;padding:26px 0 6px;margin:0 -32px;padding-left:32px;padding-right:32px;scroll-padding-left:32px}
.sg-filters::-webkit-scrollbar{display:none}
.sg-filters button{flex:0 0 auto;font-family:inherit;font-size:12.5px;font-weight:500;letter-spacing:.06em;text-transform:uppercase;color:var(--muted);background:transparent;border:1px solid var(--line);border-radius:100px;padding:9px 15px;cursor:pointer;transition:color .2s,border-color .2s,background .2s;white-space:nowrap}
.sg-filters button .n{margin-left:6px;font-weight:300;letter-spacing:0;color:var(--faint)}
.sg-filters button:hover{color:var(--ink);border-color:var(--hair)}
.sg-filters button[aria-selected="true"]{color:var(--bg);background:var(--ink);border-color:var(--ink)}
.sg-filters button[aria-selected="true"] .n{color:var(--bg);opacity:.7}

/* the rail */
.sg-wrap{position:relative;margin-top:14px}
.sg{display:flex;gap:14px;overflow-x:auto;overscroll-behavior-x:contain;scroll-snap-type:x mandatory;scrollbar-width:none;-webkit-overflow-scrolling:touch;
    padding:18px max(32px,calc((100vw - 1200px)/2 + 32px)) 30px;scroll-padding-inline:max(32px,calc((100vw - 1200px)/2 + 32px))}
.sg::-webkit-scrollbar{display:none}
.sg-card{position:relative;flex:0 0 min(78vw,520px);scroll-snap-align:start;margin:0;border-radius:16px;overflow:hidden;background:#000;
    box-shadow:0 30px 70px rgba(0,0,0,.55),0 0 0 1px rgba(255,255,255,.06);cursor:pointer;transform:translateZ(0);
    transition:transform .5s cubic-bezier(.2,.7,.2,1),opacity .5s ease,box-shadow .5s ease;opacity:.72}
.sg-card.cur{opacity:1;transform:translateY(-4px);box-shadow:0 40px 90px rgba(0,0,0,.65),0 0 0 1px rgba(255,255,255,.1)}
.sg-card[hidden]{display:none}
.sg-media{position:relative;aspect-ratio:16/9;background:#000}
.sg-media img,.sg-media video{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;display:block}
.sg-media video{opacity:0;transition:opacity .6s ease}
.sg-media video.on{opacity:1}
.sg-media::after{content:"";position:absolute;inset:0;pointer-events:none;background:linear-gradient(180deg,rgba(0,0,0,0) 38%,rgba(0,0,0,.42) 70%,rgba(0,0,0,.82) 100%)}
.sg-card figcaption{position:absolute;left:0;right:0;bottom:0;padding:16px 18px 15px;display:flex;align-items:flex-end;justify-content:space-between;gap:14px;color:#fff;z-index:2}
.sg-card figcaption b{display:block;font-size:17px;font-weight:600;letter-spacing:-.01em;text-shadow:0 1px 2px rgba(0,0,0,.6)}
.sg-card figcaption span{display:block;margin-top:3px;font-size:12.5px;line-height:1.45;color:rgba(255,255,255,.8);font-weight:300;max-width:34ch;text-shadow:0 1px 2px rgba(0,0,0,.6)}
.sg-card .sg-grp{flex:none;font-size:10px;font-weight:600;letter-spacing:.16em;text-transform:uppercase;color:rgba(255,255,255,.78);border:1px solid rgba(255,255,255,.28);border-radius:100px;padding:4px 9px;backdrop-filter:blur(6px);-webkit-backdrop-filter:blur(6px)}
.sg-card .sg-live{position:absolute;top:12px;left:12px;z-index:2;display:inline-flex;align-items:center;gap:6px;font-size:10px;font-weight:600;letter-spacing:.14em;text-transform:uppercase;color:#fff;background:rgba(0,0,0,.42);border:1px solid rgba(255,255,255,.18);border-radius:100px;padding:5px 9px 5px 8px;backdrop-filter:blur(6px);-webkit-backdrop-filter:blur(6px);opacity:0;transition:opacity .4s}
.sg-card.cur.playing .sg-live{opacity:1}
.sg-card .sg-live i{width:6px;height:6px;border-radius:50%;background:#ff4d6a;box-shadow:0 0 0 0 rgba(255,77,106,.6);animation:sgBeacon 1.8s ease-out infinite}
@keyframes sgBeacon{0%{box-shadow:0 0 0 0 rgba(255,77,106,.55)}100%{box-shadow:0 0 0 9px rgba(255,77,106,0)}}

/* hud: counter, bar, arrows */
.sg-hud{display:flex;align-items:center;gap:18px;padding:0 32px;max-width:1200px;margin:0 auto}
.sg-count{font-variant-numeric:tabular-nums;font-size:12.5px;letter-spacing:.12em;color:var(--faint)}
.sg-count b{color:var(--ink);font-weight:600}
.sg-bar{flex:1;height:2px;background:var(--line);border-radius:2px;overflow:hidden}
.sg-bar i{display:block;height:100%;width:0;background:var(--accent);transition:width .35s ease}
.sg-arrows{display:flex;gap:8px}
.sg-arrows button{width:38px;height:38px;border-radius:50%;border:1px solid var(--line);background:transparent;color:var(--ink);cursor:pointer;display:inline-flex;align-items:center;justify-content:center;transition:border-color .2s,background .2s}
.sg-arrows button:hover{border-color:var(--hair);background:rgba(127,127,127,.08)}
.sg-hint{font-size:12px;letter-spacing:.05em;color:var(--faint);text-align:center;margin-top:12px}
@media(hover:hover) and (pointer:fine){.sg-hint{display:none}}
@media(hover:none){.sg-arrows{display:none}}

/* lightbox */
.sg-lb{position:fixed;inset:0;z-index:400;background:rgba(4,4,6,.94);backdrop-filter:blur(18px);-webkit-backdrop-filter:blur(18px);display:flex;flex-direction:column;align-items:center;justify-content:center;padding:max(16px,env(safe-area-inset-top)) 16px max(16px,env(safe-area-inset-bottom));opacity:0;pointer-events:none;transition:opacity .28s ease}
.sg-lb.open{opacity:1;pointer-events:auto}
.sg-lb-stage{position:relative;width:min(100%,1180px);aspect-ratio:16/9;max-height:calc(100vh - 190px);max-height:calc(100dvh - 190px);border-radius:14px;overflow:hidden;background:#000;box-shadow:0 60px 140px rgba(0,0,0,.8);touch-action:pan-y}
.sg-lb-stage img,.sg-lb-stage video{position:absolute;inset:0;width:100%;height:100%;object-fit:contain;display:block;background:#000}
.sg-lb-stage video{opacity:0;transition:opacity .5s}
.sg-lb-stage video.on{opacity:1}
.sg-lb-meta{width:min(100%,1180px);display:flex;align-items:flex-start;justify-content:space-between;gap:18px;margin-top:16px;color:#fff}
.sg-lb-meta b{display:block;font-size:20px;font-weight:600;letter-spacing:-.01em}
.sg-lb-meta span{display:block;margin-top:5px;font-size:14px;line-height:1.5;color:rgba(255,255,255,.66);font-weight:300;max-width:60ch}
.sg-lb-meta .sg-grp{flex:none;font-size:10px;font-weight:600;letter-spacing:.16em;text-transform:uppercase;color:rgba(255,255,255,.8);border:1px solid rgba(255,255,255,.3);border-radius:100px;padding:5px 10px;margin-top:4px}
.sg-lb-nav{width:min(100%,1180px);display:flex;align-items:center;justify-content:space-between;margin-top:18px;color:rgba(255,255,255,.6);font-size:12.5px;letter-spacing:.1em;font-variant-numeric:tabular-nums}
.sg-lb-nav .grp{display:flex;gap:8px}
.sg-lb button{font-family:inherit;color:#fff;background:rgba(255,255,255,.08);border:1px solid rgba(255,255,255,.18);border-radius:100px;height:40px;min-width:40px;padding:0 14px;cursor:pointer;display:inline-flex;align-items:center;justify-content:center;gap:8px;font-size:13px;transition:background .2s}
.sg-lb button:hover{background:rgba(255,255,255,.16)}
.sg-lb-close{position:absolute;top:max(14px,env(safe-area-inset-top));right:14px;width:40px!important;padding:0!important}
.sg-lb-close svg{display:block}
@media(prefers-reduced-motion:reduce){.sg-card,.sg-media video,.sg-lb,.sg-bar i{transition:none}.sg-card .sg-live i{animation:none}}
@media(max-width:640px){
  .sg-filters{margin:0 -18px;padding-left:18px;padding-right:18px;scroll-padding-left:18px}
  .sg{gap:12px;padding:14px 18px 26px;scroll-padding-inline:18px}
  .sg-card{flex-basis:84vw;border-radius:14px}
  .sg-card figcaption{padding:13px 14px 12px}
  .sg-card figcaption b{font-size:15.5px}
  .sg-card figcaption span{font-size:12px;max-width:26ch}
  .sg-hud{padding:0 18px}
  .sg-lb-meta b{font-size:17px}.sg-lb-meta span{font-size:13px}
}