:root{--bg:#f4f5fa;--card:#fff;--ink:#14162b;--muted:#5a5f7a;--brand:#2e3ba6;--brand-ink:#fff;--accent:#f0a800;--line:#e1e3ee}
@media (prefers-color-scheme:dark){:root{--bg:#0f1120;--card:#181b30;--ink:#eceefb;--muted:#a6abc8;--brand:#8c97ff;--brand-ink:#0f1120;--accent:#f0b429;--line:#2a2e4a}}
*{box-sizing:border-box}html{-webkit-text-size-adjust:100%}
body{margin:0;background:var(--bg);color:var(--ink);font:17px/1.65 system-ui,-apple-system,"Segoe UI",Roboto,"Noto Sans","Noto Sans Devanagari",sans-serif}
a{color:var(--brand)}
.wrap{max-width:880px;margin:0 auto;padding:0 20px}
header.top{background:var(--card);border-bottom:1px solid var(--line)}
header.top .wrap{display:flex;align-items:center;justify-content:space-between;gap:12px;padding-top:12px;padding-bottom:12px;flex-wrap:wrap}
.brand{display:flex;align-items:center;gap:10px;font-weight:700;font-size:19px;color:var(--ink);text-decoration:none}
.brand img{width:38px;height:38px;border-radius:10px}
nav a{margin-left:16px;text-decoration:none;color:var(--muted);font-weight:600}nav a:hover{color:var(--brand)}
.hero{padding:48px 0 28px}
.hero h1{font-size:clamp(30px,6vw,46px);line-height:1.15;margin:0 0 14px}
.hero p{font-size:19px;color:var(--muted);margin:0 0 22px;max-width:640px}
.btn{display:inline-block;background:var(--brand);color:var(--brand-ink);padding:13px 22px;border-radius:12px;font-weight:700;text-decoration:none;margin:0 10px 10px 0}
.btn.alt{background:transparent;color:var(--brand);border:2px solid var(--brand)}
.grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:14px;margin:8px 0 28px}
.card{background:var(--card);border:1px solid var(--line);border-radius:16px;padding:18px 20px}
.card h3{margin:0 0 6px;font-size:18px}.card p{margin:0;color:var(--muted);font-size:16px}
h2.sec{font-size:26px;margin:36px 0 12px}
.note{background:var(--card);border-left:5px solid var(--accent);border-radius:10px;padding:14px 18px;color:var(--muted);font-size:15.5px;margin:22px 0}
article{background:var(--card);border:1px solid var(--line);border-radius:16px;padding:8px 26px 26px;margin:28px 0}
article h1{font-size:30px;line-height:1.25}article h2{font-size:21px;margin-top:30px}
article li{margin:4px 0}code{background:var(--bg);padding:2px 6px;border-radius:6px;font-size:.92em}
footer{border-top:1px solid var(--line);margin-top:40px;padding:24px 0 40px;color:var(--muted);font-size:15px}
footer a{margin-right:16px}