body{margin:0;font-family:Arial,sans-serif;background:#0b1020;color:#edf2f7}a{color:#93c5fd;text-decoration:none}.shell{display:grid;grid-template-columns:220px 1fr;min-height:100vh}.sidebar{background:#111827;padding:1rem}.sidebar nav a{display:block;margin:.5rem 0}.content{padding:1.5rem}.centered{min-height:100vh;display:grid;place-items:center}.card{background:#172033;border:1px solid #28344c;border-radius:12px;padding:1rem}.card.danger{border-color:#7f1d1d}.card.warn{border-color:#92400e}.form{width:320px;display:grid;gap:.75rem}label{display:grid;gap:.35rem}input,button{padding:.7rem;border-radius:8px;border:1px solid #334155}button{background:#2563eb;color:#fff;border:none;cursor:pointer}.page{display:grid;gap:1rem}.grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(180px,1fr));gap:1rem}.table{width:100%;border-collapse:collapse;background:#172033}th,td{padding:.75rem;border:1px solid #28344c;text-align:left}.error{color:#fca5a5}.logout-btn{margin-top:auto;width:100%;background:#374151;margin-top:1rem}select{padding:.7rem;border-radius:8px;border:1px solid #334155;background:#172033;color:#edf2f7}