:root{--bg: #f4f6fb;--surface: #fff;--text: #0f172a;--muted: #64748b;--primary: #4f46e5;--border: #e2e8f0;font-family:Segoe UI,system-ui,sans-serif;color:var(--text);background:var(--bg)}*{box-sizing:border-box}body{margin:0}.page{min-height:100vh}.top{display:flex;justify-content:space-between;align-items:center;padding:16px 28px;background:var(--surface);border-bottom:1px solid var(--border)}.brand{font-weight:700;font-size:1.1rem;color:var(--primary)}.layout{display:grid;grid-template-columns:220px 1fr;gap:24px;max-width:1100px;margin:0 auto;padding:24px}.nav{display:flex;flex-direction:column;gap:4px}.nav-item{padding:10px 12px;border-radius:8px;color:var(--muted);text-decoration:none}.nav-item--active{background:#eef2ff;color:var(--primary);font-weight:600}.content h1{margin:0 0 6px}.sub{color:var(--muted);margin:0 0 20px}.card{background:var(--surface);border:1px solid var(--border);border-radius:12px;padding:20px;margin-bottom:16px}.card--muted{background:#f8fafc}.card h2{margin:0 0 12px;font-size:1.05rem}.kv{display:grid;grid-template-columns:120px 1fr;gap:8px 16px;margin:0}.kv dt{color:var(--muted);font-weight:600}.kv dd{margin:0}code{font-size:.85rem}.login-card{max-width:400px;margin:80px auto}.login-card form{display:flex;flex-direction:column;gap:12px}label{display:flex;flex-direction:column;gap:4px;font-size:.85rem;font-weight:600;color:var(--muted)}input{padding:10px 12px;border:1px solid var(--border);border-radius:8px;font:inherit}button{padding:10px 14px;border:none;border-radius:8px;background:var(--primary);color:#fff;font-weight:600;cursor:pointer}button.ghost{background:transparent;color:var(--muted);border:1px solid var(--border)}.error{color:#dc2626;font-size:.9rem}@media(max-width:720px){.layout{grid-template-columns:1fr}.nav{flex-direction:row;flex-wrap:wrap}}