:root{--ink:#0A66C2;--bg:#ffffff;--text:#0f172a;--muted:#475569;--rule:#e2e8f0;--card:#ffffff;}
@media (prefers-color-scheme: dark){:root{--bg:#0b1220;--text:#e5e7eb;--muted:#cbd5e1;--rule:#1f2937;--card:#0f172a;}}
*{box-sizing:border-box} html,body{margin:0;padding:0;font-family:ui-sans-serif,system-ui,-apple-system,Segoe UI,Roboto,Inter,Arial,"Apple Color Emoji","Segoe UI Emoji"} body{background:var(--bg);color:var(--text);line-height:1.5}
a{color:var(--ink);text-decoration:none} .container{max-width:1120px;margin:0 auto;padding:0 18px} .header{position:sticky;top:0;backdrop-filter:saturate(120%) blur(8px);background:rgba(255,255,255,0.7);z-index:10;border-bottom:1px solid var(--rule)}
@media (prefers-color-scheme: dark){.header{background:rgba(11,18,32,0.6)}} .nav{display:flex;justify-content:space-between;align-items:center;padding:12px 0} .brand{display:flex;gap:10px;align-items:center} .logo{width:32px;height:32px;border-radius:10px;background:var(--ink)}
.section{padding:64px 0} .grid{display:grid;gap:16px} .grid-2{grid-template-columns:repeat(2,minmax(0,1fr))} .grid-3{grid-template-columns:repeat(3,minmax(0,1fr))} .grid-4{grid-template-columns:repeat(4,minmax(0,1fr))}
@media (max-width:900px){.grid-2,.grid-3,.grid-4{grid-template-columns:1fr}} .card{background:var(--card);border:1px solid var(--rule);border-radius:18px;padding:16px;box-shadow:0 4px 16px rgba(2,6,23,0.08)} .muted{color:var(--muted)} .btn{background:var(--ink);color:#fff;padding:10px 14px;border:none;border-radius:10px;font-weight:700;cursor:pointer}
.btn.ghost{background:transparent;color:var(--ink);border:1px solid var(--ink)} .chip{display:inline-flex;gap:8px;align-items:center;background:rgba(10,102,194,0.12);padding:6px 10px;border-radius:999px;font-size:12px;margin-right:8px} .iconbox{width:22px;height:22px;display:inline-flex;align-items:center;justify-content:center;border-radius:6px;background:rgba(10,102,194,0.10);color:var(--ink)}
.resource{transition:transform .2s ease,box-shadow .2s ease} .resource:hover{transform:translateY(-2px);box-shadow:0 10px 24px rgba(2,6,23,0.15)} .footer{border-top:1px solid var(--rule);padding:28px 0;text-align:center;font-size:14px;opacity:0.8}
.hero{position:relative;overflow:hidden} .hero-decor{position:absolute;inset:0;pointer-events:none;background:radial-gradient(600px 160px at 50% -40px, rgba(10,102,194,0.25), transparent)}
.toggle{width:40px;height:40px;border-radius:12px;border:1px solid var(--rule);background:var(--card);display:inline-flex;align-items:center;justify-content:center} .modal{position:fixed;inset:0;background:rgba(0,0,0,.6);display:flex;align-items:center;justify-content:center;padding:16px;z-index:50}
.modal>.panel{background:#0f172a;color:white;border:1px solid #1f2937;border-radius:16px;padding:16px;max-width:420px;width:100%} .hidden{display:none !important}
.lock{display:inline-flex;align-items:center;gap:6px;font-size:12px;color:var(--ink);background:rgba(10,102,194,0.08);padding:2px 6px;border-radius:8px}
.locked{position:relative} .locked .locked-content{filter:blur(6px);user-select:none;pointer-events:none}
.locked .locked-overlay{position:absolute;inset:0;display:flex;align-items:center;justify-content:center;background:linear-gradient(to bottom, rgba(255,255,255,0.0), rgba(255,255,255,0.85))}
@media (prefers-color-scheme: dark){.locked .locked-overlay{background:linear-gradient(to bottom, rgba(11,18,32,0.0), rgba(11,18,32,0.92))}}
.locked .overlay-card{background:#0f172a;color:#e5e7eb;border:1px solid #1f2937;border-radius:14px;padding:14px 16px;text-align:center;box-shadow:0 10px 24px rgba(2,6,23,0.6)} .sep{height:1px;background:var(--rule);margin:18px 0}
pre.code{background:#0f172a;color:#e5e7eb;padding:14px;border-radius:12px;overflow:auto;border:1px solid #1f2937} table{width:100%;border-collapse:collapse} th,td{border:1px solid var(--rule);padding:8px;text-align:left} thead th{background:rgba(10,102,194,0.08)}

/* extras for auto 30% preview */
.locked{position:relative}
.locked .locked-overlay{position:absolute;inset:0;display:flex;align-items:center;justify-content:center;background:linear-gradient(to bottom, rgba(255,255,255,0), rgba(255,255,255,.9))}
@media (prefers-color-scheme: dark){.locked .locked-overlay{background:linear-gradient(to bottom, rgba(11,18,32,0), rgba(11,18,32,.92))}}
.overlay-card{background:#0f172a;color:#e5e7eb;border:1px solid #1f2937;border-radius:14px;padding:14px 16px;text-align:center}
.container{max-width:1120px;margin:0 auto;padding:0 18px}
.section{padding:48px 0}
.header{position:sticky;top:0;border-bottom:1px solid #e5e7eb;background:rgba(255,255,255,.7);backdrop-filter:blur(8px)} .nav{display:flex;justify-content:space-between;align-items:center;padding:12px 0}
.brand{display:flex;gap:10px;align-items:center} .logo{width:32px;height:32px;border-radius:10px;background:var(--ink)}
.card{border:1px solid #e5e7eb;border-radius:16px;padding:16px;background:white}
.btn{background:var(--ink);color:#fff;border:none;border-radius:10px;padding:10px 14px;cursor:pointer;font-weight:700}
.btn.ghost{background:transparent;color:var(--ink);border:1px solid var(--ink)}
.muted{color:#475569}
.sep{height:1px;background:#e5e7eb;margin:14px 0}
pre.code{background:#0f172a;color:#e5e7eb;padding:14px;border-radius:12px;overflow:auto;border:1px solid #1f2937}
table{width:100%;border-collapse:collapse} th,td{border:1px solid #e5e7eb;padding:8px;text-align:left}