/* ============================================================
   SHELL — left outline rail · right cinematic stage · transport
   ============================================================ */
body{
  background:
    radial-gradient(1200px 600px at 78% -10%, #eef4ff 0%, transparent 55%),
    radial-gradient(900px 500px at 100% 110%, #fdf2f8 0%, transparent 50%),
    var(--bg);
  background-attachment:fixed;
}
.app{display:grid;grid-template-columns:clamp(284px,26vw,340px) 1fr;height:100vh;height:100dvh;overflow:hidden}

/* ---------- LEFT: outline rail ---------- */
.rail{
  background:rgba(255,255,255,.72);backdrop-filter:blur(14px);
  border-right:1px solid var(--line);display:flex;flex-direction:column;min-height:0;
}
.brand{padding:22px 22px 16px;border-bottom:1px solid var(--line)}
.brand .kick{font:600 11px/1 var(--mono);letter-spacing:.22em;color:var(--ink-4);text-transform:uppercase}
.brand h1{margin:8px 0 4px;font:800 23px/1.08 var(--font);letter-spacing:-.02em;background:linear-gradient(92deg,#2563eb,#7c3aed 45%,#db2777);-webkit-background-clip:text;background-clip:text;color:transparent}
.brand p{margin:0;font-size:12.5px;color:var(--ink-3);line-height:1.45}

.toc{flex:1;overflow-y:auto;padding:10px 12px 30px;scrollbar-width:thin}
.toc::-webkit-scrollbar{width:8px}.toc::-webkit-scrollbar-thumb{background:var(--line-strong);border-radius:8px}

.day{margin:8px 0;border:1px solid var(--line);border-radius:var(--r);background:#fff;overflow:hidden;transition:box-shadow .3s var(--ease)}
.day.open{box-shadow:var(--sh-2)}
.day-hd{display:flex;align-items:center;gap:12px;padding:13px 14px;cursor:pointer;user-select:none}
.day-dot{width:34px;height:34px;border-radius:10px;flex:none;display:grid;place-items:center;color:#fff;font:800 14px/1 var(--font);box-shadow:var(--sh-1)}
.day-meta{flex:1;min-width:0}
.day-meta .dt{font:600 10.5px/1 var(--mono);letter-spacing:.14em;text-transform:uppercase;color:var(--ink-4)}
.day-meta .th{font:700 13.5px/1.25 var(--font);color:var(--ink);margin-top:3px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.day-chev{color:var(--ink-4);transition:transform .3s var(--ease);flex:none}
.day.open .day-chev{transform:rotate(90deg)}
.badge-soon{font:700 9px/1 var(--mono);letter-spacing:.1em;color:var(--ink-4);background:var(--bg-panel);padding:4px 6px;border-radius:6px}

.sessions{max-height:0;overflow:hidden;transition:max-height .42s var(--ease)}
.day.open .sessions{max-height:760px}
.ses{display:flex;gap:11px;padding:11px 14px 11px 16px;cursor:pointer;border-top:1px solid var(--line);position:relative;transition:background .2s}
.ses:hover{background:var(--bg-soft)}
.ses[aria-disabled="true"]{cursor:not-allowed;opacity:.5}
.ses .tick{width:10px;height:10px;border-radius:50%;margin-top:4px;flex:none;border:2px solid var(--line-strong);background:#fff;transition:.25s}
.ses.active .tick{border-color:transparent;box-shadow:0 0 0 3px rgba(37,99,235,.18)}
.ses .s-body{flex:1;min-width:0}
.ses .s-ix{font:700 10px/1 var(--mono);color:var(--ink-4)}
.ses .s-ti{font:600 13px/1.32 var(--font);color:var(--ink-2);margin:3px 0 0}
.ses.active .s-ti{color:var(--ink)}
.ses .s-spec{font:500 10.5px/1 var(--mono);color:var(--spec);margin-top:5px;display:inline-block}
.ses.active{background:linear-gradient(90deg,rgba(37,99,235,.06),transparent)}
.ses.active::before{content:"";position:absolute;left:0;top:0;bottom:0;width:3px;border-radius:0 3px 3px 0}

/* ---------- RIGHT: stage ---------- */
.stage-wrap{display:flex;flex-direction:column;min-width:0;min-height:0;padding:clamp(12px,2vw,20px) clamp(12px,2vw,22px)}
.stage-top{display:flex;align-items:center;gap:14px;margin-bottom:clamp(10px,1.6vh,14px)}
.crumbs{flex:1;min-width:0}
.crumbs .c1{font:600 11px/1 var(--mono);letter-spacing:.16em;text-transform:uppercase;color:var(--ink-4)}
.crumbs .c2{font:800 clamp(17px,2.4vw,22px)/1.15 var(--font);letter-spacing:-.02em;color:var(--ink);margin-top:5px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.specchip{font:600 11px/1 var(--mono);color:var(--ink-3);background:#fff;border:1px solid var(--line);padding:8px 11px;border-radius:999px;box-shadow:var(--sh-1);white-space:nowrap}

.screen{position:relative;flex:1;min-height:0;border-radius:var(--r-xl);overflow:hidden;background:#fff;
  box-shadow:var(--sh-3),inset 0 0 0 1px rgba(15,23,42,.04);border:1px solid var(--line)}
.screen iframe{position:absolute;inset:0;width:100%;height:100%;border:0;background:#fff}
.screen .placeholder{position:absolute;inset:0;display:grid;place-content:center;justify-items:center;gap:14px;text-align:center;color:var(--ink-3)}
.placeholder .ico{width:64px;height:64px;border-radius:18px;display:grid;place-items:center;background:var(--bg-panel);color:var(--ink-4)}

/* ---------- transport ---------- */
.transport{display:flex;align-items:center;flex-wrap:wrap;gap:clamp(8px,1.2vw,14px);margin-top:clamp(10px,1.6vh,14px);padding:clamp(9px,1.4vh,12px) clamp(12px,1.6vw,16px);background:rgba(255,255,255,.8);backdrop-filter:blur(10px);border:1px solid var(--line);border-radius:var(--r-lg);box-shadow:var(--sh-1)}
.tbtn{width:42px;height:42px;border-radius:12px;border:1px solid var(--line);background:#fff;display:grid;place-items:center;cursor:pointer;color:var(--ink-2);transition:.18s var(--ease)}
.tbtn:hover{box-shadow:var(--sh-2);color:var(--ink);transform:translateY(-1px)}
.tbtn.play{width:50px;height:50px;border:0;color:#fff;background:linear-gradient(135deg,#2563eb,#7c3aed);box-shadow:var(--sh-glow)}
.scrub{flex:1 1 240px;display:flex;align-items:center;gap:12px}
.bar{flex:1;height:8px;border-radius:99px;background:var(--bg-elevated);position:relative;cursor:pointer;overflow:hidden}
.bar .fill{position:absolute;inset:0 100% 0 0;background:linear-gradient(90deg,#2563eb,#7c3aed,#db2777);border-radius:99px;transition:right .12s linear}
.bar .ticks{position:absolute;inset:0;display:flex;pointer-events:none}
.bar .ticks i{flex:1;border-right:2px solid rgba(255,255,255,.85)}
.bar .ticks i:last-child{border:0}
.time{font:600 12px/1 var(--mono);color:var(--ink-3);min-width:90px;text-align:right}
.speed{font:700 12px/1 var(--mono);color:var(--ink-2);background:#fff;border:1px solid var(--line);border-radius:10px;padding:9px 11px;cursor:pointer}

/* fullscreen: keep the white studio look + transport visible */
#stageWrap:fullscreen{background:
  radial-gradient(1200px 600px at 78% -10%, #eef4ff 0%, transparent 55%),
  radial-gradient(900px 500px at 100% 110%, #fdf2f8 0%, transparent 50%),
  var(--bg);width:100vw;height:100vh;padding:22px 26px}
#stageWrap:-webkit-full-screen{background:var(--bg);width:100vw;height:100vh;padding:22px 26px}

/* ---------- responsive: tablets & phones ---------- */
@media (max-width:920px){
  .app{grid-template-columns:1fr;grid-template-rows:auto minmax(0,1fr)}
  .rail{max-height:44vh;border-right:0;border-bottom:1px solid var(--line)}
  .brand{padding:16px 18px 12px}
}
@media (max-width:600px){
  .brand h1{font-size:20px}
  .brand p{display:none}
  .tbtn{width:38px;height:38px}.tbtn.play{width:44px;height:44px}
  .time{min-width:0}
  .crumbs .c1{font-size:10px}
  /* drop the ±15s buttons on very small screens to keep the transport tidy */
  #back15,#fwd15{display:none}
}
@media (max-height:560px) and (min-width:921px){
  .stage-wrap{padding:10px 16px}
  .transport{margin-top:8px}
}