/* Expert Algo Lab — landing hub stylesheet */
:root{
  --bg:#080a12; --bg2:#0d1020; --panel:#11152499; --line:#222c44;
  --ink:#eaf0fb; --dim:#8593b2; --dim2:#5f6c8a;
  --accent:#5ad1ff; --accent2:#8b7bff; --accent3:#5be0c8; --gold:#ffd166;
  --good:#5be7a9;
}
*{box-sizing:border-box}
html,body{margin:0}
body{
  background:
    radial-gradient(1200px 720px at 78% -12%, #15203c 0%, transparent 55%),
    radial-gradient(900px 600px at 8% 8%, #161334 0%, transparent 50%),
    var(--bg);
  color:var(--ink);
  font-family:"Pretendard",-apple-system,system-ui,"Segoe UI",Roboto,"Noto Sans KR",sans-serif;
  -webkit-font-smoothing:antialiased;
  line-height:1.5;
}
a{color:inherit;text-decoration:none}
.container{max-width:1180px;margin:0 auto;padding:0 24px}

/* ---- masthead ---- */
.masthead{border-bottom:1px solid var(--line);position:sticky;top:0;z-index:20;
  background:rgba(8,10,18,.72);backdrop-filter:blur(10px)}
.mast-inner{display:flex;align-items:center;justify-content:space-between;height:60px}
.brand{font-weight:800;letter-spacing:.3px;font-size:17px;display:flex;align-items:baseline;gap:9px}
.brand .dot{color:var(--accent)}
.brand small{font-size:10.5px;color:var(--dim2);font-weight:600;letter-spacing:1.5px}
.mast-meta a{font-size:11.5px;color:var(--dim);font-weight:700;letter-spacing:1px;margin-left:18px;transition:.15s}
.mast-meta a:hover{color:var(--accent)}

/* ---- hero ---- */
.hero{padding:74px 0 40px;position:relative;overflow:hidden}
.hero .eyebrow{font-size:11.5px;letter-spacing:2.5px;color:var(--accent3);font-weight:800;text-transform:uppercase}
.hero h1{font-size:clamp(28px,4.4vw,52px);line-height:1.1;margin:16px 0 0;font-weight:800;letter-spacing:-.5px;
  background:linear-gradient(120deg,#fff 20%,#9fc6ff 55%,#b9aaff 90%);-webkit-background-clip:text;background-clip:text;color:transparent}
.hero .standfirst{max-width:680px;color:#aab6d4;font-size:15px;margin-top:18px}
.hero-stats{display:flex;gap:34px;margin-top:34px;flex-wrap:wrap}
.hero-stats .cell{display:flex;flex-direction:column;gap:3px}
.hero-stats .k{font-size:10.5px;color:var(--dim2);letter-spacing:1.5px;text-transform:uppercase;font-weight:700}
.hero-stats .v{font-size:24px;font-weight:800;font-variant-numeric:tabular-nums}
.hero-stats .v.accent{color:var(--accent)}

/* ---- toolbar / filters ---- */
.toolbar{display:flex;align-items:center;justify-content:space-between;margin:30px 0 22px;flex-wrap:wrap;gap:12px}
.filter-row{display:flex;gap:8px;flex-wrap:wrap}
.filter-btn{background:#121828;border:1px solid var(--line);color:var(--dim);font-size:12.5px;font-weight:700;
  padding:7px 15px;border-radius:999px;cursor:pointer;transition:.15s}
.filter-btn:hover{color:var(--ink);border-color:#3a486e}
.filter-btn.active{background:linear-gradient(120deg,var(--accent),var(--accent2));color:#06121c;border-color:transparent}
.hint{font-size:10.5px;color:var(--dim2);letter-spacing:1.5px;font-weight:700}

/* ---- gallery ---- */
.gallery{display:grid;grid-template-columns:repeat(auto-fill,minmax(330px,1fr));gap:20px;padding-bottom:30px}
.demo{display:block;border:1px solid var(--line);border-radius:18px;overflow:hidden;background:linear-gradient(180deg,#0f1424,#0b0e1a);
  transition:.2s;position:relative}
.demo:hover{transform:translateY(-4px);border-color:var(--accent);box-shadow:0 18px 50px -20px rgba(90,209,255,.4)}
.demo .thumb{height:172px;position:relative;overflow:hidden;border-bottom:1px solid var(--line);background:#0a0d18}
.demo .thumb svg{position:absolute;inset:0;width:100%;height:100%}
.demo .badge{position:absolute;top:12px;left:12px;z-index:3;font-size:10px;font-weight:800;letter-spacing:.6px;
  padding:4px 9px;border-radius:999px;color:#06121c}
.demo .badge.drone{background:var(--accent)}
.demo .badge.protein{background:var(--accent3)}
.demo .play{position:absolute;right:12px;bottom:12px;z-index:3;width:38px;height:38px;border-radius:50%;
  background:rgba(8,12,22,.7);border:1px solid var(--line);display:grid;place-items:center;font-size:14px;color:var(--ink);transition:.15s}
.demo:hover .play{background:var(--accent);color:#06121c;border-color:var(--accent)}
.demo .body{padding:16px 18px 18px}
.demo .meta{display:flex;justify-content:space-between;font-size:10.5px;color:var(--dim2);letter-spacing:1px;font-weight:700;text-transform:uppercase}
.demo .name{font-size:18.5px;font-weight:800;margin-top:8px}
.demo .sub{font-size:12px;color:var(--accent3);margin-top:2px;font-weight:600}
.demo .blurb{font-size:12.5px;color:#9aa7c6;margin-top:10px;line-height:1.55}
.demo .tags{display:flex;gap:6px;margin-top:13px;flex-wrap:wrap}
.demo .tag{font-size:10px;color:var(--dim);border:1px solid var(--line);border-radius:999px;padding:2px 8px;font-weight:600}

/* upcoming / placeholder card */
.demo.soon{opacity:.55;pointer-events:none;border-style:dashed}
.demo.soon .thumb{display:grid;place-items:center;color:var(--dim2);font-size:13px;letter-spacing:1px}

/* ---- colophon ---- */
.colophon{border-top:1px solid var(--line);margin-top:20px;padding:22px 0 40px;display:flex;justify-content:space-between;
  font-size:11.5px;color:var(--dim2);letter-spacing:.5px;flex-wrap:wrap;gap:10px}

@media (max-width:560px){
  .hero{padding:50px 0 30px}
  .gallery{grid-template-columns:1fr}
}

/* ---- play-all button ---- */
.playall-btn{
  display:inline-flex;align-items:center;gap:6px;
  background:linear-gradient(135deg,var(--accent),var(--accent2));
  color:#06121c;font-size:13px;font-weight:800;letter-spacing:.5px;
  padding:8px 18px;border-radius:999px;border:none;cursor:pointer;
  transition:.2s;box-shadow:0 4px 20px -6px rgba(90,209,255,.4)
}
.playall-btn:hover{transform:translateY(-2px);box-shadow:0 8px 30px -6px rgba(90,209,255,.5)}
.playall-icon{font-size:11px}

/* ---- player overlay ---- */
.player-overlay{
  position:fixed;inset:0;z-index:100;
  background:var(--bg);
  display:none;flex-direction:column
}
.player-overlay.show{display:flex}
.player-bar{
  display:flex;align-items:center;gap:12px;
  padding:10px 20px;
  background:#0d1020;border-bottom:1px solid var(--line);
  flex-shrink:0
}
.player-close{
  width:36px;height:36px;border-radius:8px;border:1px solid var(--line);
  background:#121828;color:var(--ink);font-size:16px;cursor:pointer;
  display:grid;place-items:center;transition:.15s
}
.player-close:hover{background:#1a2040;border-color:var(--accent)}
.player-progress{
  flex:1;height:6px;background:#121828;border-radius:3px;overflow:hidden
}
.player-fill{height:100%;background:linear-gradient(90deg,var(--accent),var(--accent2));transition:width .4s;width:0}
.player-info{font-size:12px;color:var(--dim);font-weight:700;white-space:nowrap;letter-spacing:1px}
.player-name{font-size:13px;color:var(--gold);font-weight:700;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;max-width:180px}
.player-prev,.player-next{
  width:32px;height:32px;border-radius:8px;border:1px solid var(--line);
  background:#121828;color:var(--ink);font-size:13px;cursor:pointer;
  display:grid;place-items:center;transition:.15s
}
.player-prev:hover,.player-next:hover{background:#1a2040;border-color:var(--accent)}
.player-overlay iframe{
  flex:1;width:100%;border:none;background:var(--bg)
}