/* styles.css — simple, clean, responsive */
:root{
  --bg:#ffffff;
  --text:#0f172a;
  --muted:#475569;
  --brand:#7c3aed;
  --brand-2:#a78bfa;
  --card:#f8fafc;
  --border:#e2e8f0;
}
*{box-sizing:border-box}
html,body{margin:0;padding:0;background:var(--bg);color:var(--text);font:16px/1.6 system-ui,-apple-system,Segoe UI,Roboto,Helvetica,Arial,"Apple Color Emoji","Segoe UI Emoji"}
a{color:var(--brand);text-decoration:none}
a:hover{text-decoration:underline}
.container{max-width:1100px;margin:0 auto;padding:32px 20px}
header{border-bottom:1px solid var(--border);background:#fff;position:sticky;top:0;z-index:10}
header .container{display:flex;align-items:center;gap:16px;padding:14px 20px}
.logo{font-weight:800;letter-spacing:.2px}
nav{margin-left:auto;display:flex;gap:14px;flex-wrap:wrap}
nav a{padding:8px 12px;border-radius:10px;color:var(--text)}
nav a.active, nav a:hover{background:var(--card)}
main .hero{padding:20px;background:var(--card);border:1px solid var(--border);border-radius:14px}
h1{font-size:clamp(28px,4vw,40px);line-height:1.2;margin:0 0 10px 0}
h2{margin-top:30px}
p{margin:10px 0;color:var(--muted)}
.footer{border-top:1px solid var(--border);padding:20px 0;color:var(--muted)}
.grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:16px;margin-top:18px}
.card{background:#fff;border:1px solid var(--border);border-radius:12px;padding:16px}
.badge{display:inline-block;background:var(--brand-2);color:#1e1b4b;padding:2px 10px;border-radius:999px;font-weight:600;font-size:12px}
.iframe-wrap{position:relative;width:100%;padding-top:62%}
.iframe-wrap iframe{position:absolute;inset:0;border:0;width:100%;height:100%;border-radius:12px}
.btn{display:inline-block;background:var(--brand);color:#fff;border:0;border-radius:12px;padding:10px 14px;font-weight:700}
.btn:hover{opacity:.93}
.note{padding:10px 12px;border:1px dashed var(--border);border-radius:10px;background:var(--card);color:var(--muted);font-size:14px}
ul.clean{padding-left:18px;margin:6px 0}
details{border:1px solid var(--border);border-radius:10px;padding:12px;background:#fff}
details+details{margin-top:10px}
summary{cursor:pointer;font-weight:700}