:root{--accent:#007bff;--bg:#f6f7fb;--card:#ffffff;--muted:#6b7280}body{margin:0;font-family:Inter,system-ui,-apple-system,Segoe UI,Roboto,Helvetica Neue,Arial;background:var(--bg);color:#111827}.container{max-width:1100px;margin:28px auto;padding:0 16px}.header{display:flex;align-items:center;justify-content:space-between;margin-bottom:18px}.brand{font-weight:700;color:var(--accent);font-size:20px}nav a{margin-left:12px;color:var(--muted);text-decoration:none}nav a.active{color:var(--accent);font-weight:600}.card{background:var(--card);border-radius:10px;padding:14px;box-shadow:0 6px 18px #0f172a0f}