:root{--bg:#f7f8fa;--surface:#ffffff;--border:#e2e5ea;--text:#1a1d23;--muted:#5b6472;--accent:#2456e6;--danger:#c62f2f}*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--text);font-family:system-ui,-apple-system,Segoe UI,sans-serif;font-size:15px;line-height:1.5}a{color:var(--accent);text-decoration:none}.shell{display:grid;grid-template-columns:220px 1fr;min-height:100vh}.sidebar{background:var(--surface);border-right:1px solid var(--border);padding:1.25rem 1rem}.sidebar h1{font-size:1rem;margin:0 0 1.5rem}.sidebar nav a{display:block;color:var(--text);padding:.4rem .6rem;border-radius:6px;margin-bottom:2px}.sidebar nav a:hover{background:var(--bg)}.main{padding:2rem;max-width:1100px}.card{background:var(--surface);border:1px solid var(--border);border-radius:10px;padding:1.25rem;margin-bottom:1.25rem}.card h2{margin-top:0;font-size:1.05rem}table{width:100%;border-collapse:collapse;font-size:.9rem}td,th{text-align:left;padding:.5rem .6rem;border-bottom:1px solid var(--border)}th{font-weight:600}.muted,th{color:var(--muted)}.button{display:inline-block;background:var(--accent);color:#fff;border:none;border-radius:8px;padding:.6rem 1.1rem;font-size:.95rem;cursor:pointer}.center-page{min-height:100vh;display:flex;align-items:center;justify-content:center}.badge{display:inline-block;background:var(--bg);border:1px solid var(--border);border-radius:999px;padding:.05rem .6rem;font-size:.78rem;margin-right:.25rem}