:root,html[data-theme=dark]{--bg-primary:#0f1117;--bg-secondary:#1f2937;--text-primary:#e5e7eb;--text-secondary:#9ca3af;--text-muted:#6b7280;--accent:#818cf8;--accent-hover:#6366f1;--border:#374151;--success:#10b981;--warning:#f59e0b;--danger:#ef4444}html[data-theme=light]{--bg-primary:#fff;--bg-secondary:#f3f4f6;--text-primary:#111827;--text-secondary:#4b5563;--text-muted:#9ca3af;--accent:#6366f1;--accent-hover:#4f46e5;--border:#e5e7eb}*{box-sizing:border-box}*,body,html{margin:0;padding:0}body,html{min-height:100vh}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica Neue,Arial,sans-serif;background:var(--bg-primary);color:var(--text-primary);line-height:1.6;transition:background .15s ease,color .15s ease}a{color:var(--accent);text-decoration:none;transition:color .2s ease}a:hover{color:var(--accent-hover);text-decoration:underline}.container{max-width:800px;margin:0 auto;padding:24px}header{text-align:center;margin-bottom:40px;padding-bottom:24px;border-bottom:1px solid var(--border)}.logo{font-size:48px;margin-bottom:16px}h1{font-size:28px;font-weight:700;color:var(--text-primary);margin-bottom:8px}h2{font-size:20px;margin:32px 0 16px}h2,h3{font-weight:600;color:var(--text-primary)}h3{font-size:16px;margin:24px 0 12px}p{margin-bottom:16px;color:var(--text-secondary)}ol,ul{margin:16px 0;padding-left:24px}li{margin-bottom:8px;color:var(--text-secondary)}footer{margin-top:48px;padding-top:24px;border-top:1px solid var(--border);text-align:center;color:var(--text-muted);font-size:14px}.highlight-box{background:var(--bg-secondary);border:1px solid var(--border);border-radius:8px;padding:16px;margin:16px 0}.btn{display:inline-block;background:var(--accent);color:#fff;padding:14px 32px;border-radius:12px;font-size:16px;font-weight:600;margin:8px 0}.btn,.btn:hover{text-decoration:none}.btn:hover{background:var(--accent-hover)}.loading{display:flex;align-items:center;justify-content:center;min-height:50vh;color:var(--text-secondary)}.error{text-align:center;padding:48px 24px;color:var(--danger)}.back-link{display:inline-block;margin-bottom:24px;color:var(--accent)}.subtitle{color:var(--text-secondary);font-size:15px;margin-top:4px}.last-updated{color:var(--text-muted);font-size:13px}