* { box-sizing: border-box; }
body {
    font-family: -apple-system, Segoe UI, Roboto, Arial, sans-serif;
    margin: 0;
    background: #f4f6f8;
    color: #1f2937;
}

/* Login */
.login-page { display: flex; align-items: center; justify-content: center; min-height: 100vh; }
.login-box { background: #fff; padding: 40px; border-radius: 12px; box-shadow: 0 4px 20px rgba(0,0,0,0.08); width: 340px; }
.login-box h1 { margin: 0 0 4px; font-size: 22px; color: #0f4c81; }
.login-box .subtitle { margin: 0 0 20px; color: #6b7280; font-size: 14px; }

/* Nav */
.topnav { background: #0f4c81; color: #fff; display: flex; justify-content: space-between; align-items: center; padding: 14px 24px; flex-wrap: wrap; }
.topnav .brand { font-weight: 700; font-size: 18px; }
.topnav .links a { color: #fff; text-decoration: none; margin-left: 18px; font-size: 14px; }
.topnav .links a:hover { text-decoration: underline; }
.topnav .user { margin-left: 18px; font-size: 13px; opacity: 0.85; }

.container { max-width: 900px; margin: 24px auto; padding: 0 16px; }
h1 { font-size: 22px; color: #0f4c81; }

label { display: block; font-size: 13px; font-weight: 600; margin: 12px 0 4px; color: #374151; }
input, select { width: 100%; padding: 10px 12px; border: 1px solid #d1d5db; border-radius: 8px; font-size: 15px; }
button {
    margin-top: 16px; background: #f5820b; color: #fff; border: none; padding: 12px 20px;
    border-radius: 8px; font-size: 15px; font-weight: 600; cursor: pointer;
}
button:hover { background: #d96e00; }

.scan-panel, .manual-panel, .form-card { background: #fff; padding: 20px; border-radius: 10px; margin-bottom: 20px; box-shadow: 0 1px 4px rgba(0,0,0,0.06); }
.scan-panel input { font-size: 18px; padding: 14px; text-align: center; }

.student-table { width: 100%; border-collapse: collapse; background: #fff; border-radius: 10px; overflow: hidden; }
.student-table th, .student-table td { padding: 10px 12px; border-bottom: 1px solid #eee; text-align: left; font-size: 14px; }
.student-table th { background: #f0f4f8; color: #374151; }
.btn-in { background: #16a34a; color: #fff; border: none; padding: 6px 12px; border-radius: 6px; margin-right: 6px; cursor: pointer; }
.btn-out { background: #dc2626; color: #fff; border: none; padding: 6px 12px; border-radius: 6px; cursor: pointer; }

.alert { padding: 12px 16px; border-radius: 8px; margin: 12px 0; font-size: 14px; }
.alert-success { background: #dcfce7; color: #166534; }
.alert-error { background: #fee2e2; color: #991b1b; }
.loading { color: #6b7280; }

.badge { padding: 3px 10px; border-radius: 20px; font-size: 12px; font-weight: 700; }
.badge-in { background: #dcfce7; color: #166534; }
.badge-out { background: #fee2e2; color: #991b1b; }

.grid2 { display: grid; grid-template-columns: 1fr 1fr; gap: 0 16px; }
@media (max-width: 600px) { .grid2 { grid-template-columns: 1fr; } }

.filter-form { margin-bottom: 16px; max-width: 220px; }

/* Camera capture / barcode scanner */
.camera-panel { background: #fff; padding: 20px; border-radius: 10px; margin-bottom: 20px; box-shadow: 0 1px 4px rgba(0,0,0,0.06); }
.camera-panel .optional { font-weight: 400; color: #6b7280; font-size: 12px; }
#reader { width: 100%; max-width: 360px; margin: 0 auto; border-radius: 8px; overflow: hidden; background: #111; }
#reader video { width: 100% !important; border-radius: 8px; }
.camera-controls { display: flex; gap: 8px; margin-top: 10px; flex-wrap: wrap; }
.camera-controls button { margin-top: 0; }
#camStop, #camSwitch { background: #0f4c81; }
#camStart:disabled, #camStop:disabled, #camSwitch:disabled { background: #9ca3af; cursor: not-allowed; }
#camThumb { margin-top: 10px; max-width: 100px; border-radius: 8px; border: 2px solid #16a34a; display: block; }
.camera-status { font-size: 13px; color: #6b7280; margin: 10px 0 0; }

.manual-panel { background: #fff; padding: 20px; border-radius: 10px; margin-bottom: 20px; box-shadow: 0 1px 4px rgba(0,0,0,0.06); }
.manual-panel summary { cursor: pointer; font-weight: 600; color: #0f4c81; font-size: 14px; }
.manual-panel[open] summary { margin-bottom: 12px; }

.checkbox-label { display: flex; align-items: center; gap: 8px; font-size: 14px; font-weight: 400; margin: 14px 0 0; color: #374151; }
.checkbox-label input { width: auto; }

.log-thumb { width: 44px; height: 44px; object-fit: cover; border-radius: 6px; }
.no-photo { color: #9ca3af; }