*{box-sizing:border-box}body{margin:0;font-family:Arial,sans-serif;background:#f4f6f8;color:#1f2937}.container{max-width:1100px;margin:25px auto;background:#fff;padding:24px;border-radius:14px;box-shadow:0 8px 25px rgba(0,0,0,.08)}.login{max-width:430px;margin:70px auto}.menu{background:#111827;padding:14px;display:flex;gap:10px;flex-wrap:wrap}.menu a{color:#fff;text-decoration:none;background:#374151;padding:10px 14px;border-radius:8px}.menu a:hover{background:#2563eb}input,select,textarea{width:100%;padding:10px;margin:7px 0 14px;border:1px solid #d1d5db;border-radius:8px}button,.btn{display:inline-block;background:#2563eb;color:white;border:0;padding:10px 15px;border-radius:8px;text-decoration:none;cursor:pointer}.btn.green,button.green{background:#16a34a}.btn.red{background:#dc2626}.btn.gray{background:#6b7280}.grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:15px}.card{background:#f9fafb;padding:18px;border-radius:12px;border:1px solid #e5e7eb}table{width:100%;border-collapse:collapse;margin-top:15px}th,td{padding:10px;border-bottom:1px solid #e5e7eb;text-align:left}th{background:#f3f4f6}.alert{padding:12px;border-radius:8px;margin-bottom:15px}.ok{background:#dcfce7;color:#166534}.error{background:#fee2e2;color:#991b1b}.foto{max-width:130px;border-radius:12px;border:1px solid #ddd}.qr{max-width:240px;width:100%;border:1px solid #ddd;padding:8px;background:#fff}.center{text-align:center}.small{font-size:13px;color:#6b7280}@media(max-width:700px){.container{margin:10px;padding:16px}.menu{display:block}.menu a{display:block;margin:6px 0}table{font-size:13px}}

/* Actualización cafetería: lector QR y foto del estudiante */
.tabs{display:flex;gap:8px;flex-wrap:wrap;margin:12px 0}
.tab{border:0;border-radius:8px;padding:10px 12px;background:#e9edf5;color:#1f2937;cursor:pointer;font-weight:600}
.tab.active{background:#2563eb;color:#fff}
.tab-panel{display:none;border:1px solid #e5e7eb;border-radius:12px;padding:14px;margin-top:10px;background:#f8fafc}
.tab-panel.active{display:block}
.videoqr{width:100%;max-width:520px;border-radius:14px;background:#111;margin-top:12px;display:block}
.resultado-qr{display:grid;grid-template-columns:220px 1fr;gap:22px;align-items:center}
.foto-grande{width:220px;height:220px;object-fit:cover;border-radius:18px;border:4px solid #e5e7eb;box-shadow:0 8px 24px rgba(0,0,0,.15)}
.foto-placeholder{width:220px;height:220px;border-radius:18px;background:#e5e7eb;display:flex;align-items:center;justify-content:center;color:#6b7280;font-weight:700}
.resultado-qr h2{margin-top:0;font-size:28px}
.resultado-qr p{font-size:18px;margin:8px 0}
@media(max-width:700px){.resultado-qr{grid-template-columns:1fr;text-align:center}.foto-grande,.foto-placeholder{margin:auto}}