:root{
  --bg:#0c0e13; --panel:#151822; --panel-2:#1b1f2b; --border:#272c3a;
  --text:#f1f3f7; --text-dim:#9aa1b2; --accent:#6ea8fe; --accent-2:#a78bfa;
  --radius:16px; --radius-sm:12px;
  --shadow:0 12px 32px rgba(0,0,0,.4); --shadow-sm:0 4px 14px rgba(0,0,0,.25);
  --maxw:1240px;
  color-scheme: dark;
}
@media (prefers-color-scheme: light){
  :root{
    --bg:#f4f5fa; --panel:#ffffff; --panel-2:#eef0f6; --border:#e3e5ef;
    --text:#161821; --text-dim:#666c7e; --accent:#3b6fe0; --accent-2:#7c5cf0;
    --shadow:0 12px 32px rgba(30,34,60,.1); --shadow-sm:0 4px 14px rgba(30,34,60,.06);
    color-scheme: light;
  }
}
*{box-sizing:border-box}
html,body{margin:0;padding:0}
body{
  background:
    radial-gradient(1100px 480px at 12% -10%, color-mix(in srgb, var(--accent) 16%, transparent), transparent 60%),
    radial-gradient(900px 460px at 100% 0%, color-mix(in srgb, var(--accent-2) 14%, transparent), transparent 55%),
    var(--bg);
  color:var(--text);
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;
  line-height:1.5;
  -webkit-font-smoothing:antialiased;
}
a{color:inherit;text-decoration:none}
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 20px}
header.site{
  position:sticky;top:0;z-index:30;
  background:color-mix(in srgb, var(--bg) 78%, transparent);
  backdrop-filter:blur(10px);
  -webkit-backdrop-filter:blur(10px);
  padding:16px 0;
  border-bottom:1px solid var(--border);
}
header.site .wrap{display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap}
.brand{display:flex;align-items:center;gap:11px}
.brand .mark{
  width:40px;height:40px;border-radius:11px;
  background:linear-gradient(135deg,var(--accent),var(--accent-2));
  display:flex;align-items:center;justify-content:center;font-size:19px;flex:none;
  box-shadow:var(--shadow-sm);
}
.brand .name{font-weight:800;font-size:17px;letter-spacing:-.01em}
.brand .name small{display:block;font-weight:500;font-size:12px;color:var(--text-dim);letter-spacing:0}
.crumbs{font-size:13.5px;color:var(--text-dim);font-weight:500}
.crumbs a{padding:4px 2px;border-radius:6px}
.crumbs a:hover{color:var(--accent)}
.hero{padding:40px 0 6px}
.hero h1{font-size:clamp(26px,4.4vw,40px);margin:0 0 10px;letter-spacing:-.02em;font-weight:800}
.hero p{color:var(--text-dim);margin:0;max-width:640px;font-size:15.5px}
.stat-row{display:flex;gap:10px;flex-wrap:wrap;margin-top:20px}
.pill{
  background:var(--panel);border:1px solid var(--border);border-radius:999px;
  padding:7px 15px;font-size:13px;color:var(--text-dim);box-shadow:var(--shadow-sm);
}
.pill b{color:var(--text)}
.search-box{margin:24px 0 8px;position:relative}
.search-box::before{
  content:"\1F50D";position:absolute;left:16px;top:50%;transform:translateY(-50%);
  opacity:.55;font-size:14px;pointer-events:none;
}
.search-box input{
  width:100%;padding:14px 16px 14px 42px;border-radius:var(--radius-sm);border:1px solid var(--border);
  background:var(--panel);color:var(--text);font-size:15px;outline:none;
  transition:border-color .15s ease, box-shadow .15s ease;
  -webkit-appearance:none;
}
.search-box input:focus{border-color:var(--accent);box-shadow:0 0 0 3px color-mix(in srgb, var(--accent) 25%, transparent)}
.search-box input::placeholder{color:var(--text-dim)}
main{padding-bottom:70px}
.section-title{margin:36px 0 16px;font-size:13px;text-transform:uppercase;letter-spacing:.09em;color:var(--text-dim);font-weight:700}

.cat-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(250px,1fr));gap:18px}
.cat-card{
  background:var(--panel);border:1px solid var(--border);border-radius:var(--radius);
  overflow:hidden;display:flex;flex-direction:column;
  transition:transform .18s ease,box-shadow .18s ease,border-color .18s ease;
  will-change:transform;
}
.cat-card:hover, .cat-card:focus-visible{transform:translateY(-4px);box-shadow:var(--shadow);border-color:color-mix(in srgb, var(--accent) 55%, var(--border))}
.cat-card:active{transform:translateY(-1px) scale(.99)}
.cat-thumb{
  aspect-ratio:16/9;background:linear-gradient(135deg, var(--panel-2), var(--panel));position:relative;overflow:hidden;
  display:flex;align-items:center;justify-content:center;
}
.cat-thumb img{width:100%;height:100%;object-fit:cover;display:block;position:relative;z-index:2}
.cat-thumb .stack{position:absolute;inset:0;z-index:3;pointer-events:none;
  background:linear-gradient(180deg,rgba(0,0,0,0) 40%,rgba(0,0,0,.6) 100%);}
.cat-thumb .icon-badge{
  position:absolute;left:10px;top:10px;z-index:4;width:34px;height:34px;border-radius:10px;
  background:rgba(15,17,24,.55);backdrop-filter:blur(3px);
  display:flex;align-items:center;justify-content:center;font-size:16px;
}
.cat-thumb .count{
  position:absolute;right:10px;bottom:10px;z-index:4;background:rgba(10,11,16,.6);color:#fff;
  font-size:12px;padding:4px 10px;border-radius:999px;font-weight:600;backdrop-filter:blur(3px);
}
.cat-thumb .glyph{position:absolute;inset:0;display:flex;align-items:center;justify-content:center;font-size:38px;opacity:.5;z-index:1;pointer-events:none}
.cat-thumb.noimg .icon-badge{display:none}
.cat-body{padding:15px 16px 17px}
.cat-body h3{margin:0 0 4px;font-size:16.5px;letter-spacing:-.01em;font-weight:700}
.cat-body p{margin:0;font-size:12.5px;color:var(--text-dim)}

.video-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(220px,1fr));gap:16px}
.v-card{
  background:var(--panel);border:1px solid var(--border);border-radius:var(--radius-sm);overflow:hidden;
  cursor:pointer;transition:transform .16s ease,border-color .16s ease,box-shadow .16s ease;
}
.v-card:hover, .v-card:focus-visible{transform:translateY(-3px);border-color:color-mix(in srgb, var(--accent) 55%, var(--border));box-shadow:var(--shadow)}
.v-card:active{transform:translateY(-1px) scale(.98)}
.v-thumb{aspect-ratio:16/9;background:var(--panel-2);position:relative;overflow:hidden}
.v-thumb img{width:100%;height:100%;object-fit:cover;display:block}
.v-thumb .play{
  position:absolute;inset:0;display:flex;align-items:center;justify-content:center;
  background:rgba(8,9,14,0);transition:background .16s ease;
}
.v-thumb .play svg{opacity:0;transform:scale(.85);transition:opacity .16s ease,transform .16s ease;filter:drop-shadow(0 4px 10px rgba(0,0,0,.5))}
.v-card:hover .v-thumb .play, .v-card:focus-visible .v-thumb .play{background:rgba(8,9,14,.32)}
.v-card:hover .v-thumb .play svg, .v-card:focus-visible .v-thumb .play svg{opacity:1;transform:scale(1)}
.v-title{padding:11px 13px 13px;font-size:13.5px;font-weight:600;letter-spacing:-.005em}

.empty{color:var(--text-dim);padding:50px 0;text-align:center;font-size:14.5px}

/* Lightbox player */
.lightbox{
  position:fixed;inset:0;background:rgba(4,5,8,.9);backdrop-filter:blur(4px);
  display:none;align-items:center;justify-content:center;z-index:100;padding:20px;
}
.lightbox.open{display:flex;animation:fadein .12s ease}
@keyframes fadein{from{opacity:0}to{opacity:1}}
.lightbox .box{width:100%;max-width:1020px}
.lightbox video{width:100%;max-height:76vh;border-radius:12px;background:#000;display:block;box-shadow:0 24px 70px rgba(0,0,0,.6)}
.lightbox .bar{display:flex;align-items:center;justify-content:space-between;margin-bottom:10px;color:#fff;gap:12px}
.lightbox .bar .t{font-weight:700;font-size:15px}
.lightbox .close{
  background:rgba(255,255,255,.12);border:1px solid rgba(255,255,255,.25);color:#fff;
  width:38px;height:38px;border-radius:10px;font-size:18px;cursor:pointer;flex:none;
  display:flex;align-items:center;justify-content:center;transition:background .15s ease;
}
.lightbox .close:hover{background:rgba(255,255,255,.22)}

footer{border-top:1px solid var(--border);padding:28px 0 calc(28px + env(safe-area-inset-bottom));color:var(--text-dim);font-size:13px}

/* Mobile */
@media (max-width:640px){
  .wrap{padding:0 16px}
  header.site{padding:13px 0}
  .brand .mark{width:34px;height:34px;font-size:16px;border-radius:9px}
  .brand .name{font-size:15px}
  .brand .name small{font-size:11px}
  .hero{padding:26px 0 4px}
  .hero p{font-size:14.5px}
  .cat-grid,.video-grid{grid-template-columns:1fr 1fr;gap:12px}
  .cat-body{padding:12px 12px 14px}
  .cat-body h3{font-size:14.5px}
  .cat-body p{display:none}
  .v-title{font-size:12.5px;padding:9px 10px 11px}
  .search-box input{padding:13px 14px 13px 40px;font-size:14px}
  .section-title{margin:26px 0 12px}
  .lightbox{padding:0}
  .lightbox .box{max-width:none}
  .lightbox video{max-height:60vh;border-radius:0}
  .lightbox .bar{padding:12px}
}
@media (max-width:400px){
  .cat-grid,.video-grid{grid-template-columns:1fr}
}