:root{--brand: #3f51b5}*{box-sizing:border-box}body{margin:0;font-family:system-ui,-apple-system,Segoe UI,Roboto,sans-serif;background:#f5f6fa;color:#1e2233}.container{max-width:1024px;margin:0 auto;padding:24px}.card{background:#fff;border-radius:12px;padding:20px;box-shadow:0 1px 4px #00000014;margin-bottom:16px}button{background:var(--brand);color:#fff;border:none;border-radius:8px;padding:10px 16px;cursor:pointer;font-size:14px}button.secondary{background:#eceefb;color:var(--brand)}input,select{padding:8px 10px;border:1px solid #cfd3e6;border-radius:8px;width:100%}label{display:block;font-size:13px;margin:8px 0 4px;color:#555b7a}nav a{margin-right:16px;color:var(--brand);text-decoration:none;font-weight:600}