:root{color-scheme:dark;--bg:#0d0f14;--surface:#141720;--surface2:#1c2030;--border:#272c3d;--text:#e2e8f0;--muted:#94a3b8;--accent:#6366f1;--accent2:#a5b4fc}
*{box-sizing:border-box}
html{min-height:100%;background:var(--bg)}
body{min-height:100svh;margin:0;padding:24px;display:grid;place-items:center;background:radial-gradient(circle at 18% -8%,rgba(168,85,247,.28),transparent 34%),radial-gradient(circle at 105% 18%,rgba(99,102,241,.25),transparent 32%),linear-gradient(180deg,var(--bg),#10131b);color:var(--text);font:16px/1.48 "Segoe UI","Trebuchet MS",sans-serif}
.window{width:min(100%,940px);overflow:hidden;border:1px solid var(--border);border-radius:14px;background:var(--bg);box-shadow:0 24px 70px rgba(0,0,0,.42)}
.header{display:flex;align-items:center;gap:10px;min-height:62px;padding:12px 22px;border-bottom:1px solid var(--border);background:linear-gradient(180deg,rgba(20,23,32,.96),rgba(20,23,32,.88)),radial-gradient(circle at 12% 0,rgba(168,85,247,.22),transparent 42%);font-size:14px;font-weight:700;letter-spacing:-.3px}
.logo{width:32px;height:32px;object-fit:contain;filter:drop-shadow(0 0 5px rgba(99,102,241,.58))}
.header-tag{margin-left:auto;padding:6px 9px;border:1px solid var(--border);border-radius:7px;background:var(--surface2);color:var(--muted);font-size:11px;font-weight:600;letter-spacing:.7px}
.content{padding:24px}
.intro{margin-bottom:18px;padding:0 2px}
.eyebrow{margin:0 0 6px;color:var(--accent2);font-size:12px;font-weight:700;letter-spacing:.75px}
h1{margin:0 0 7px;font-size:29px;line-height:1.2;letter-spacing:-.6px}
.intro p:last-child{margin:0;color:var(--muted)}
.grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}
.card{padding:17px 18px;border:1px solid var(--border);border-radius:10px;background:var(--surface)}
h2{display:flex;align-items:center;gap:9px;margin:0 0 10px;padding-bottom:10px;border-bottom:1px solid var(--border);font-size:14px;line-height:1.3;letter-spacing:.25px}
.number{display:grid;place-items:center;width:25px;height:25px;flex:none;border:1px solid rgba(99,102,241,.38);border-radius:6px;background:rgba(99,102,241,.11);color:var(--accent2);font-size:11px}
.card p{margin:0 0 9px;color:var(--muted);font-size:15px;line-height:1.46}
.card p:last-child{margin-bottom:0}
code{padding:1px 4px;border-radius:3px;background:var(--surface2);color:var(--text);font-size:.91em}
@media(max-width:650px){body{display:block;padding:12px}.header{min-height:56px;padding:10px 14px}.content{padding:18px 14px}.grid{grid-template-columns:1fr}h1{font-size:25px}.card{padding:15px}}