:root{
  --bg:#0b1220;
  --card:#0f172a;
  --ink:#e5edff;
  --muted:#c7d2fe;
  --accent:#6ea8fe;
  --accent2:#22c55e;
  --border:#1f2a44;
}

:root.light{
  --bg:#f8fafc;
  --card:#ffffff;
  --ink:#0f172a;
  --muted:#475569;
  --accent:#2563eb;
  --accent2:#16a34a;
  --border:#e2e8f0;
}

*{box-sizing:border-box}
html,body{margin:0;padding:0;font-family:Inter,system-ui,-apple-system,Segoe UI,Roboto,Arial,sans-serif;color:var(--ink);
  background:var(--bg);line-height:1.75}
a{color:var(--accent);text-decoration:none;transition:all .2s ease}a:hover{opacity:.9;text-decoration:underline}
img{max-width:100%;display:block}
.container{max-width:1120px;margin:0 auto;padding:0 20px}
.header{position:sticky;top:0;background:color-mix(in oklab, var(--bg), #000 10%);backdrop-filter:blur(10px);border-bottom:1px solid var(--border);z-index:20}
.nav{display:flex;align-items:center;justify-content:space-between;padding:14px 0}
.brand{display:flex;align-items:center;gap:12px;font-weight:800;letter-spacing:.2px;color:var(--ink)}
.brand img{height:30px;filter:drop-shadow(0 2px 6px rgba(110,168,254,.35))}
.menu{display:flex;gap:18px;flex-wrap:wrap}
.menu a{padding:8px 10px;border-radius:10px;color:var(--ink)}
.menu a.active{background:linear-gradient(135deg, rgba(110,168,254,.18), rgba(34,197,94,.18));border:1px solid rgba(110,168,254,.35)}
.theme-toggle{border:1px solid var(--border);background:transparent;color:var(--ink);padding:8px 12px;border-radius:10px;cursor:pointer}
.theme-toggle:hover{background:rgba(255,255,255,.06)}
.hero{padding:72px 0 32px}
.badge{display:inline-block;padding:6px 12px;border:1px solid rgba(110,168,254,.35);border-radius:999px;font-size:12px;color:var(--ink);background:rgba(110,168,254,.12)}
h1{font-size:clamp(28px,4vw,44px);margin:.4em 0 .2em;font-weight:900;letter-spacing:-.4px}
.lead{color:var(--muted);max-width:820px}
.grid{display:grid;gap:22px;margin-top:26px}
@media(min-width:980px){.grid{grid-template-columns:2fr 1fr}}
.card, article{border:1px solid var(--border);border-radius:16px;padding:22px;background:linear-gradient(180deg,rgba(255,255,255,.02),rgba(255,255,255,.01));box-shadow:0 10px 30px rgba(0,0,0,.25)}
.card h3, article h2{margin:0 0 10px 0}
.section{margin:44px 0}
.list{list-style:disc;padding-left:20px}
.footer{border-top:1px solid var(--border);margin-top:44px}
.footer .container{padding:24px 20px;color:var(--muted);font-size:14px}
.btn{display:inline-block;padding:12px 16px;border-radius:12px;background:linear-gradient(135deg, var(--accent), #4f8df6);color:#081022;border:1px solid rgba(110,168,254,.6);font-weight:700;transition:transform .08s ease}
.btn:hover{filter:brightness(1.08);text-decoration:none;transform:translateY(-1px)}
.cards{display:grid;gap:16px}
@media(min-width:760px){.cards{grid-template-columns:repeat(3,1fr)}}
.meta{color:var(--muted);font-size:14px;margin-bottom:6px}
.kicker{font-size:12px;color:var(--muted);text-transform:uppercase;letter-spacing:.12em}
.figure{background:rgba(110,168,254,.06);border:1px dashed rgba(110,168,254,.35);border-radius:12px;padding:12px;text-align:center;color:var(--muted);font-size:13px}
.small{font-size:13px;color:var(--muted)}
.table{width:100%;border-collapse:collapse}
.table th,.table td{border:1px solid var(--border);padding:10px;text-align:left;vertical-align:top}
blockquote{border-left:4px solid rgba(110,168,254,.35);padding-left:12px;color:var(--ink);background:rgba(110,168,254,.06);border-radius:6px}
details{border:1px solid var(--border);border-radius:12px;padding:14px 16px;background:rgba(255,255,255,.03)}
details+details{margin-top:12px}
summary{cursor:pointer;font-weight:800;color:var(--ink)}
form{display:grid;gap:10px}
input,textarea{font:inherit;padding:10px 12px;border-radius:10px;border:1px solid var(--border);background:transparent;color:var(--ink)}
hr.divider{border:0;height:1px;background:linear-gradient(90deg, rgba(110,168,254,0), rgba(110,168,254,.5), rgba(110,168,254,0));margin:28px 0}

/* Back to top */
#topBtn{position:fixed;right:16px;bottom:16px;padding:10px 12px;border-radius:12px;border:1px solid var(--border);background:rgba(255,255,255,.06);color:var(--ink);cursor:pointer;display:none}
#cookie{position:fixed;left:16px;bottom:16px;max-width:520px;background:linear-gradient(180deg,rgba(255,255,255,.06),rgba(255,255,255,.03));border:1px solid var(--border);border-radius:12px;padding:14px;color:var(--ink);display:none}
#cookie button{margin-left:10px}