:root{font-family:system-ui,Avenir,Helvetica,Arial,sans-serif;line-height:1.5;font-weight:400;color-scheme:light;color:#1e293b;background-color:#f8fafc;font-synthesis:none;text-rendering:optimizeLegibility;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}body{margin:0;min-width:320px;min-height:100vh}#root{width:100%;min-height:100vh}.student-card{display:flex;gap:24px;background-color:var(--card-bg);border-radius:8px;padding:24px;box-shadow:var(--shadow-lg);max-width:500px;width:100%;animation:slideIn .3s ease;border:2px solid var(--primary-color);border-left:6px solid var(--accent-color)}.student-photo{flex-shrink:0}.student-photo img{width:150px;height:150px;border-radius:8px;object-fit:cover;border:3px solid var(--primary-color);box-shadow:var(--shadow-md)}.student-info{flex:1;display:flex;flex-direction:column;justify-content:center}.student-name{font-size:20px;font-weight:700;color:var(--text-primary);margin-bottom:16px}.student-name .first-name{color:var(--accent-color)}.student-detail{display:flex;justify-content:space-between;align-items:center;padding:8px 0;border-bottom:1px solid var(--border-color)}.student-detail:last-child{border-bottom:none}.student-detail .label{font-weight:600;color:var(--text-secondary);font-size:13px;text-transform:uppercase;letter-spacing:.5px}.student-detail .value{font-size:14px;color:var(--text-primary);font-weight:500}.student-detail .rfid-value{font-family:Courier New,monospace;font-size:12px;letter-spacing:1px;color:var(--accent-color);font-weight:600}@media(max-width:640px){.student-card{flex-direction:column;align-items:center;gap:16px;padding:16px}.student-photo img{width:120px;height:120px}.student-name{text-align:center;font-size:18px}.student-detail{flex-direction:column;align-items:flex-start;justify-content:flex-start;border:none;border-bottom:1px solid var(--border-color)!important}.student-detail .label{display:block;margin-bottom:4px}.student-detail .value{display:block}}@keyframes slideIn{0%{opacity:0;transform:scale(.95)}to{opacity:1;transform:scale(1)}}:root{--primary-color: #0052CC;--primary-hover: #0041A3;--accent-color: #E53E3E;--success-color: #22863a;--error-color: #E53E3E;--bg-color: #f0f4ff;--card-bg: #ffffff;--border-color: #d4dcf7;--text-primary: #1a1a2e;--text-secondary: #4a5567;--shadow-sm: 0 1px 2px 0 rgba(0, 52, 204, .05);--shadow-md: 0 4px 6px -1px rgba(0, 52, 204, .1);--shadow-lg: 0 10px 15px -3px rgba(0, 52, 204, .15)}*{margin:0;padding:0;box-sizing:border-box}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Oxygen,Ubuntu,Cantarell,Fira Sans,Droid Sans,Helvetica Neue,sans-serif;background-color:var(--bg-color);color:var(--text-primary);line-height:1.5}#root{min-height:100vh}.app-container{min-height:100vh;display:flex;flex-direction:column;background:linear-gradient(135deg,var(--bg-color) 0%,#ecf0f1 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#2563eb1a}.rfid-input:disabled{background-color:var(--bg-color);color:var(--text-secondary);cursor:not-allowed}.lookup-button{padding:14px 28px;font-size:16px;font-weight:600;border:none;border-radius:6px;background:linear-gradient(135deg,var(--primary-color) 0%,var(--accent-color) 100%);color:#fff;cursor:pointer;transition:all .3s ease;box-shadow:var(--shadow-md)}.lookup-button:hover:not(:disabled){transform:translateY(-2px);box-shadow:var(--shadow-lg);background:linear-gradient(135deg,var(--primary-hover) 0%,#d43030 100%)}.lookup-button:disabled{opacity:.5;cursor:not-allowed}.result-section{display:flex;flex-direction:column;align-items:center;gap:20px;flex:1}.success-message{color:var(--primary-color);font-size:18px;font-weight:600;animation:slideIn .3s ease;padding:12px 20px;background-color:#0034cc1a;border-radius:6px;border-left:4px solid var(--primary-color)}.error-message{color:var(--error-color);font-size:18px;font-weight:600;padding:16px 20px;background-color:#e53e3e1a;border-radius:6px;border-left:4px solid var(--error-color);animation:slideIn .3s ease}.clear-button{padding:10px 24px;font-size:14px;font-weight:600;border:none;border-radius:6px;background-color:var(--border-color);color:var(--text-primary);cursor:pointer;transition:all .3s ease}.clear-button:hover{background-color:#cbd5e1}.app-footer{text-align:center;margin-top:40px;padding-top:20px;border-top:1px solid var(--border-color);font-size:14px;color:var(--text-secondary)}@keyframes slideIn{0%{opacity:0;transform:translateY(-10px)}to{opacity:1;transform:translateY(0)}}@media(max-width:640px){.app-container{padding:12px}.app-header{margin-bottom:24px;margin-top:12px}.app-header h1{font-size:24px}.app-header p{font-size:14px}.input-group{flex-direction:column}.lookup-button{width:100%}}.student-form-overlay{position:fixed;inset:0;background:#00000080;display:flex;align-items:center;justify-content:center;z-index:10001;padding:16px}.student-form-modal{background:#fff;border-radius:12px;box-shadow:0 20px 40px #0034cc33;width:100%;max-width:620px;max-height:90vh;display:flex;flex-direction:column;overflow:hidden}.form-header{display:flex;align-items:center;justify-content:space-between;padding:20px 24px;background:var(--primary-color);color:#fff}.form-header h2{font-size:20px;font-weight:700}.form-close-btn{background:transparent;border:none;color:#fffc;font-size:18px;cursor:pointer;padding:4px 8px;border-radius:4px;transition:all .15s;line-height:1}.form-close-btn:hover{color:#fff;background:#ffffff26}.form-body{padding:24px;overflow-y:auto;flex:1}.form-photo-section{display:flex;gap:20px;align-items:flex-start;margin-bottom:24px;padding-bottom:24px;border-bottom:1px solid var(--border-color)}.photo-preview-container{flex-shrink:0}.photo-preview{width:100px;height:100px;border-radius:8px;object-fit:cover;border:3px solid var(--primary-color);box-shadow:var(--shadow-md);display:block}.photo-placeholder{width:100px;height:100px;border-radius:8px;background:var(--bg-color);border:2px dashed var(--border-color);display:flex;align-items:center;justify-content:center;color:var(--text-secondary);font-size:12px;font-weight:600}.photo-actions{display:flex;flex-direction:column;gap:8px;justify-content:center}.photo-hint{font-size:12px;color:var(--text-secondary);margin-top:2px}.form-fields{display:flex;flex-direction:column;gap:16px}.form-row{display:flex;gap:16px}.form-row.two-col>.form-group{flex:1}.form-group{display:flex;flex-direction:column;gap:5px;flex:1}.form-group label{font-size:13px;font-weight:600;color:var(--text-secondary);text-transform:uppercase;letter-spacing:.4px}.form-group input{padding:10px 14px;font-size:14px;border:2px solid var(--border-color);border-radius:6px;background:#fff;color:var(--text-primary);outline:none;transition:border-color .2s}.form-group input:focus{border-color:var(--primary-color);box-shadow:0 0 0 3px #0052cc1a}.form-group input:disabled{background:var(--bg-color);color:var(--text-secondary);cursor:not-allowed}.input-error{border-color:var(--accent-color)!important}.field-error{font-size:12px;color:var(--accent-color);font-weight:500}.field-hint{font-size:12px;color:var(--text-secondary)}.form-footer{display:flex;justify-content:flex-end;gap:12px;padding:16px 24px;border-top:1px solid var(--border-color);background:#fafbff}@media(max-width:480px){.form-row.two-col{flex-direction:column}.form-photo-section{flex-direction:column;align-items:center}.photo-actions{align-items:center}}.admin-page{padding:28px 32px;max-width:1100px;margin:0 auto;width:100%}.admin-notification{position:fixed;top:60px;left:50%;transform:translate(-50%);z-index:9999;padding:12px 24px;border-radius:8px;font-weight:600;font-size:14px;box-shadow:var(--shadow-lg);animation:slideDown .3s ease;white-space:nowrap}.admin-notification--success{background:#d1fae5;color:#065f46;border:1px solid #6ee7b7}.admin-notification--error{background:#fee2e2;color:#991b1b;border:1px solid #fca5a5}@keyframes slideDown{0%{opacity:0;transform:translate(-50%) translateY(-10px)}to{opacity:1;transform:translate(-50%) translateY(0)}}.admin-header{margin-bottom:24px}.admin-title-row{display:flex;justify-content:space-between;align-items:center;margin-bottom:16px}.admin-title-row h2{font-size:26px;font-weight:700;color:var(--primary-color)}.admin-search-row{display:flex;align-items:center;gap:16px}.admin-search-input{flex:1;max-width:480px;padding:10px 16px;font-size:14px;border:2px solid var(--border-color);border-radius:8px;background:#fff;color:var(--text-primary);outline:none;transition:border-color .2s}.admin-search-input:focus{border-color:var(--primary-color);box-shadow:0 0 0 3px #0052cc1a}.admin-count{font-size:13px;color:var(--text-secondary);white-space:nowrap}.admin-table-wrapper{background:#fff;border-radius:10px;box-shadow:var(--shadow-md);overflow:hidden;border:1px solid var(--border-color)}.admin-table{width:100%;border-collapse:collapse}.admin-table thead{background:var(--primary-color);color:#fff}.admin-table th{padding:12px 16px;font-size:12px;font-weight:700;text-transform:uppercase;letter-spacing:.6px;text-align:left}.admin-table tbody tr{border-bottom:1px solid var(--border-color);transition:background .15s}.admin-table tbody tr:last-child{border-bottom:none}.admin-table tbody tr:hover{background:#f5f8ff}.admin-table td{padding:12px 16px;font-size:14px;color:var(--text-primary);vertical-align:middle}.td-photo{width:68px}.admin-thumb{width:48px;height:48px;border-radius:6px;object-fit:cover;border:2px solid var(--border-color);display:block}.admin-thumb-placeholder{width:48px;height:48px;border-radius:6px;background:var(--bg-color);border:2px dashed var(--border-color);display:flex;align-items:center;justify-content:center;font-size:10px;color:var(--text-secondary);font-weight:600}.student-fullname{font-weight:600}.rfid-code{font-family:Courier New,monospace;font-size:12px;background:#f0f4ff;color:var(--accent-color);padding:2px 6px;border-radius:4px;font-weight:600}.td-actions{width:140px}.td-actions{display:flex;gap:8px;align-items:center;padding-top:10px;padding-bottom:10px}.admin-empty{padding:48px;text-align:center;color:var(--text-secondary);font-size:15px}.confirm-overlay{position:fixed;inset:0;background:#00000073;display:flex;align-items:center;justify-content:center;z-index:10000}.confirm-dialog{background:#fff;border-radius:10px;padding:32px;max-width:400px;width:90%;box-shadow:var(--shadow-lg)}.confirm-dialog h3{font-size:20px;font-weight:700;color:var(--text-primary);margin-bottom:12px}.confirm-dialog p{font-size:14px;color:var(--text-secondary);margin-bottom:24px;line-height:1.6}.confirm-actions{display:flex;justify-content:flex-end;gap:12px}.btn{padding:10px 20px;font-size:14px;font-weight:600;border:none;border-radius:6px;cursor:pointer;transition:all .2s ease;display:inline-flex;align-items:center;gap:6px}.btn:disabled{opacity:.5;cursor:not-allowed}.btn-primary{background:var(--primary-color);color:#fff}.btn-primary:hover:not(:disabled){background:var(--primary-hover);transform:translateY(-1px);box-shadow:var(--shadow-md)}.btn-secondary{background:var(--border-color);color:var(--text-primary)}.btn-secondary:hover:not(:disabled){background:#c8d3e8}.btn-danger{background:var(--accent-color);color:#fff}.btn-danger:hover:not(:disabled){background:#c53030;transform:translateY(-1px);box-shadow:var(--shadow-md)}.btn-danger-outline{background:transparent;color:var(--accent-color);border:1.5px solid var(--accent-color)}.btn-danger-outline:hover:not(:disabled){background:#fee2e2}.btn-sm{padding:6px 14px;font-size:13px}@media(max-width:768px){.admin-page{padding:16px}.admin-title-row h2{font-size:20px}.admin-table th:nth-child(5),.admin-table td:nth-child(5){display:none}}.attendance-page{padding:1.5rem;max-width:1100px;margin:0 auto}.attendance-filters{display:flex;gap:.75rem;align-items:center;flex-wrap:wrap;margin-top:.75rem}.attendance-date-filter,.attendance-period-filter{flex:0 0 auto;width:auto}.period-badge{display:inline-block;padding:.2rem .55rem;border-radius:999px;font-size:.75rem;font-weight:700;letter-spacing:.04em}.period-badge--am{background:#dbeafe;color:#1d4ed8}.period-badge--pm{background:#fef9c3;color:#a16207}.tapped-at{color:#6b7280;font-size:.875rem;white-space:nowrap}.app-shell{min-height:100vh;display:flex;flex-direction:column;background:linear-gradient(135deg,var(--bg-color) 0%,#ecf0f1 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