:root{--panel: #ffffff;--line: #e2e8f0;--line-strong: rgba(37, 99, 235, .28);--text: #334155;--muted: #64748b;--cyan: #1d4ed8;--blue: #2563eb;--emerald: #0d9488;--amber: #d97706;--orange: #ea580c;--rose: #e11d48;--violet: #7c3aed;--navy: #0f1f3d;--shadow: 0 4px 6px -1px rgba(15, 31, 61, .08), 0 2px 4px -2px rgba(15, 31, 61, .06);--shadow-lg: 0 10px 30px -10px rgba(15, 31, 61, .18);--radius-xl: 16px;--radius-lg: 12px}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;color:var(--text);font-family:Inter,system-ui,-apple-system,Segoe UI,Roboto,sans-serif;background:#fff;min-height:100vh}body:before{content:none}a{color:inherit}.shell{width:min(900px,calc(100% - 32px));margin:0 auto;padding:24px 0 48px}.topbar{display:flex;justify-content:space-between;align-items:center;gap:16px;padding:14px 18px;border:1px solid var(--line);background:#ffffffe6;backdrop-filter:blur(20px);border-radius:999px;position:sticky;top:16px;z-index:20;box-shadow:var(--shadow)}.topbar-group{display:flex;align-items:center;gap:16px}.brand{display:flex;align-items:center;gap:14px}.brand-mark{width:42px;height:42px;border-radius:14px;display:grid;place-items:center;color:#0f1f3d;background:linear-gradient(135deg,var(--cyan),var(--blue));font-family:Space Grotesk,sans-serif;font-weight:700;box-shadow:0 12px 30px #2563eb2e;overflow:hidden}.brand-mark img{width:100%;height:100%;object-fit:cover;display:block}.brand-copy strong,h1,h2,h3,h4{font-family:Space Grotesk,sans-serif;letter-spacing:-.03em}.brand-copy strong{display:block;font-size:.96rem}.brand-copy span,.topbar-note,.muted{color:var(--muted)}.top-links{display:flex;align-items:center;gap:10px}.top-links a{padding:10px 14px;border-radius:999px;border:1px solid var(--line);background:#fff;text-decoration:none;color:#475569;font-size:.92rem}.top-links a.active{background:linear-gradient(135deg,#2563eb38,#2563eb24);border-color:#2563eb59;color:var(--cyan)}.breadcrumbs{display:flex;gap:6px;font-size:.84rem;color:var(--muted);margin-top:16px}.breadcrumbs a{color:var(--cyan);text-decoration:none}.breadcrumbs span.sep{color:#64748b}.panel{margin-top:24px;padding:32px;border-radius:var(--radius-xl);border:1px solid var(--line);background:var(--panel);backdrop-filter:blur(18px);box-shadow:var(--shadow)}.panel h1{font-size:clamp(2rem,4vw,3rem);margin:0 0 6px;line-height:1.05}.panel h1 span{display:block;color:var(--cyan)}.panel h2{margin:28px 0 12px;font-size:1.4rem}.panel h3{margin:20px 0 10px;font-size:1.1rem}.panel p{color:#475569;line-height:1.7;margin:0 0 14px}.panel ul{color:#475569;line-height:1.8;padding-left:20px}.panel ul li{margin-bottom:6px}.panel a{color:var(--cyan);text-decoration:none;font-weight:600}.panel a:hover{text-decoration:underline}.feature-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px;margin-top:18px}.feature-card{padding:16px 18px;border-radius:16px;background:#f8fafc;border:1px solid var(--line)}.feature-card h4{margin:0 0 8px;display:flex;align-items:center;gap:8px;font-size:.98rem}.feature-card p{margin:0;font-size:.88rem;color:#475569;line-height:1.55}.feature-card a{font-size:.86rem}.stack-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px;margin-top:14px}.stack-item{padding:12px 14px;border-radius:14px;background:#f8fafc;border:1px solid var(--line);font-size:.86rem}.stack-item strong{display:block;color:var(--cyan);font-family:Space Grotesk,sans-serif}footer{width:min(900px,calc(100% - 32px));margin:0 auto 32px;padding:22px 24px;color:var(--muted);border-top:1px solid var(--line)}.footer-nav{display:flex;flex-wrap:wrap;gap:12px;margin-top:12px}.footer-nav a{color:#475569;text-decoration:none}@media(max-width:720px){.topbar{position:static;border-radius:26px;padding:12px 14px}.topbar-note{display:none}.topbar-group{width:100%;justify-content:space-between;flex-wrap:wrap}.top-links{width:100%;overflow-x:auto}.feature-grid,.stack-grid{grid-template-columns:1fr}.panel{padding:22px}}@media(max-width:520px){.shell{width:100%;padding-top:8px}.topbar{position:static;border-radius:0 0 18px 18px;padding:10px 12px;margin:0 0 10px;border-left:0;border-right:0;border-top:0}.brand-copy span,.top-links{display:none}.panel{margin:18px 8px 0;padding:18px;border-radius:22px}footer{width:calc(100% - 16px);padding:18px 4px 0}}