:root{
  --bg:#0b0d10; --panel:#12161b; --card:#161b22; --text:#e6eef7; --muted:#a6b0bf; --accent:#39e29d; --accent-2:#31c78a; --shadow: rgba(0,0,0,0.3); --border:#1e242c;
}
.light-mode {
  --bg:#f8f9fa; --panel:#ffffff; --card:#f1f3f4; --text:#212529; --muted:#6c757d; --accent:#28a745; --accent-2:#218838; --shadow: rgba(0,0,0,0.1); --border:#dee2e6;
}
*{box-sizing:border-box}
html,body{margin:0;height:100%;background:var(--bg);color:var(--text);font:16px/1.55 system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif}
a{color:var(--accent);text-decoration:none;transition:color 0.25s ease,transform 0.1s ease}
a:hover{color:var(--accent-2);transform:translateY(-1px)}
a:focus{outline:2px solid var(--accent);outline-offset:2px}
img{max-width:100%;height:auto}
.container{max-width:1160px;margin:0 auto;padding:20px}
.header{position:sticky;top:0;background:rgba(11,13,16,.8);backdrop-filter:saturate(120%) blur(6px);border-bottom:1px solid var(--border);z-index:20}
.header-inner{display:flex;align-items:center;justify-content:space-between;gap:20px}
.brand{display:flex;align-items:center;gap:10px;font-weight:800;font-size:20px}
.brand img{width:34px;height:34px;border-radius:8px}
.nav a{margin-left:14px}
.nav .btn{padding:.48rem .85rem;border:1px solid var(--accent);border-radius:10px}
.hero{padding:18px 0 6px}
h1,h2,h3{margin:.2em 0 .35em;font-weight:800}
.tag{color:var(--muted);margin:0 0 10px}
.grid{display:grid;grid-template-columns:2fr 1fr;gap:18px}
.card{background:var(--card);border:1px solid var(--border);border-radius:14px;padding:16px}
.video{aspect-ratio:16/9;background:#000;border-radius:12px;overflow:hidden}
.video iframe{width:100%;height:100%}
.list{list-style:none;margin:0;padding:0}
.list li{margin:.45rem 0}
.btn{display:inline-block;background:var(--accent);color:#061015;font-weight:800;padding:.6rem 1rem;border-radius:12px}
.btn.wide{display:block;text-align:center}
.footer{border-top:1px solid var(--border);margin-top:24px;padding:18px 0;color:var(--muted);font-size:14px}
.sponsors{margin-top:24px}
.section{margin-top:16px}
.kv{display:flex;gap:12px;align-items:center}
.kv img{width:56px;height:56px;border-radius:10px}
.code{background:#0f1317;border:1px solid #1b2129;border-radius:10px;padding:10px;font-family:ui-monospace,Consolas,Monaco,monospace;color:#cfe7ff}
.carousel{display:flex;gap:10px;overflow-x:auto;padding:10px 0}
.video-item{flex-shrink:0;width:300px}
table{width:100%;border-collapse:collapse;margin-top:10px}
th,td{border:1px solid var(--border);padding:8px;text-align:left}
th{background:var(--panel)}
@media (max-width:900px){.grid{grid-template-columns:1fr}.nav{display:none}}