:root{font-family:system-ui,-apple-system,Segoe UI,Roboto,Helvetica,Arial,sans-serif}*{box-sizing:border-box}body{margin:0;background:#f6f8fb;color:#0f172a}a{color:inherit;text-decoration:none}.layout{display:grid;grid-template-columns:240px 1fr;min-height:100vh}.sidebar{background:#0f172a;color:#fff;padding:16px}.content{padding:24px}.nav{display:flex;flex-direction:column;gap:8px;margin-top:16px}.nav a{padding:10px;border-radius:8px;background:#ffffff14}.card{background:#fff;border-radius:12px;padding:16px;box-shadow:0 1px 4px #00000014}.grid{display:grid;gap:12px;grid-template-columns:repeat(auto-fit,minmax(220px,1fr))}.btn{border:0;background:#2563eb;color:#fff;padding:10px 14px;border-radius:8px;cursor:pointer}.input{width:100%;padding:10px;border:1px solid #cbd5e1;border-radius:8px}.stack{display:flex;flex-direction:column;gap:12px}@media (max-width: 900px){.layout{grid-template-columns:1fr}}