*{box-sizing:border-box}body{margin:0;font-family:Arial,sans-serif;background:#f5f7fb;color:#172033}header{display:flex;justify-content:space-between;align-items:center;padding:18px 28px;background:#101827;color:#fff}nav{display:flex;gap:8px;flex-wrap:wrap}button{border:0;border-radius:8px;padding:10px 14px;cursor:pointer;background:#1d4ed8;color:#fff}button.secondary{background:#475569}main{max-width:1100px;margin:28px auto;padding:0 20px}.login{min-height:100vh;display:grid;place-items:center}.card{width:min(380px,92vw);background:#fff;padding:30px;border-radius:16px;box-shadow:0 12px 35px #0002;display:grid;gap:12px}.card input{padding:12px;border:1px solid #ccd3df;border-radius:8px}section{background:#fff;padding:22px;border-radius:14px;box-shadow:0 4px 20px #0001;overflow:auto}table{width:100%;border-collapse:collapse}th,td{text-align:left;padding:12px;border-bottom:1px solid #e6e9ef}.notice{min-height:24px;margin-bottom:10px;font-weight:700}.muted{color:#64748b}.error{color:#b91c1c}.ok{color:#166534}@media(max-width:700px){header{align-items:flex-start;gap:12px;flex-direction:column}}