body {
      font-family: Arial, sans-serif;
      margin: 0;
      background: #f4f6fa;
      color: #202938;
    }
    header {
      background: #183153;
      color: white;
      padding: 24px;
    }
    main {
      max-width: 1100px;
      margin: 30px auto;
      padding: 0 20px;
    }
    .staff-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
      gap: 16px;
    }
    .card {
      background: white;
      padding: 22px;
      border-radius: 12px;
      box-shadow: 0 2px 8px #00000012;
    }
    .card h3 { margin-top: 0; }
    .status { font-weight: bold; color: #666; }
    .reserved { color: #946200; }
/* Administrator security forms; original staff-card layout is retained. */
[hidden] { display: none !important; }
.login-panel { max-width: 460px; }
label { display: block; margin: 12px 0; }
input:not([type="checkbox"]), select, textarea { display: block; width: 100%; box-sizing: border-box; padding: 10px; margin-top: 6px; border: 1px solid #b6c1d0; border-radius: 6px; font: inherit; }
button { padding: 9px 14px; margin: 6px 8px 6px 0; border: 0; border-radius: 6px; background: #183153; color: white; cursor: pointer; }
button:focus-visible, input:focus-visible, select:focus-visible { outline: 3px solid #3795df; outline-offset: 2px; }
.security-panel, #adminManagement { margin-top: 24px; }
.admin-row { border-bottom: 1px solid #d8dee8; padding: 10px 0; }
.actions { display: flex; flex-wrap: wrap; }
#message { overflow-wrap: anywhere; }
#qr { max-width: 100%; height: auto; }
@media (max-width: 600px) { main { margin: 16px auto; } .card { padding: 16px; } }