:root {
    --primary-bg: #f8f9fa;
    --secondary-bg: #e9ecef;
    --header-bg: #212529;
    --header-text: #FFD700;
    --primary-text: #212529;
    --secondary-text: #495057;
    --accent-color: #FFD700;
    --border-color: #dee2e6;
    --program-el-bg: #cce5ff;
    --program-fs-bg: #d4edda;
    --program-ma-bg: #f8d7da;
    --danger-color: #dc3545;
    --success-color: #28a745;
    --warning-color: #ffc107;
    --info-color: #17a2b8;
    --graduated-color: #6c757d;
    --empty-bg: #ffffff;
    --empty-text: #6c757d;
    --historical-bg: #f1f3f4;
    --appointment-bg: #ffb3ff;
    --transfer-color: #ff6b6b;
    --loa-color: #e17055;
}

/* Login Page Styles */
.login-container {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    background: linear-gradient(135deg, var(--primary-bg) 0%, var(--secondary-bg) 100%);
    padding: 20px;
}

.login-box {
    background: white;
    padding: 40px;
    border-radius: 20px;
    box-shadow: 0 15px 40px rgba(0,0,0,0.1);
    width: 100%;
    max-width: 400px;
    text-align: center;
}

.login-logo {
    max-width: 200px;
    height: auto;
    margin-bottom: 30px;
}

.login-title {
    color: var(--primary-text);
    font-size: 1.8em;
    font-weight: 600;
    margin-bottom: 30px;
}

.login-form {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.login-input {
    padding: 15px;
    border: 2px solid var(--border-color);
    border-radius: 10px;
    font-size: 16px;
    transition: all 0.3s ease;
}

.login-input:focus {
    outline: none;
    border-color: var(--accent-color);
    box-shadow: 0 0 0 3px rgba(255, 215, 0, 0.1);
}

.login-button {
    background: linear-gradient(135deg, var(--accent-color) 0%, #e6c300 100%);
    color: var(--header-bg);
    font-weight: 600;
    padding: 15px;
    border: none;
    border-radius: 10px;
    font-size: 16px;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 4px 15px rgba(255, 215, 0, 0.3);
}

.login-button:hover {
    background: linear-gradient(135deg, #e6c300 0%, #d4b800 100%);
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(255, 215, 0, 0.4);
}

.login-error {
    background: #f8d7da;
    color: #721c24;
    padding: 15px;
    border-radius: 10px;
    margin-bottom: 20px;
    border: 1px solid #f5c6cb;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    margin: 0;
    padding: 10px;
    background: var(--primary-bg);
    color: var(--primary-text);
    line-height: 1.6;
}

.container {
    max-width: 1800px;
    margin: 0 auto;
}

.header {
    background: linear-gradient(135deg, var(--header-bg) 0%, #495057 100%);
    color: var(--header-text);
    padding: 25px;
    border-radius: 15px;
    text-align: center;
    margin-bottom: 20px;
    box-shadow: 0 8px 25px rgba(0,0,0,0.15);
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-wrap: wrap;
    gap: 15px;
}

.header-logo {
    height: 50px;
    width: auto;
    margin-right: 15px;
}

.header-content {
    flex: 2;
    text-align: center;
}

.header h1 { 
    margin: 0; 
    font-size: 1.6em; 
    font-weight: 300;
    letter-spacing: 1px;
}

.header p { 
    margin: 8px 0 0; 
    font-size: 1.1em; 
    opacity: 0.9; 
}

.current-period-section {
    display: flex;
    align-items: center;
    gap: 10px;
    background: rgba(255, 215, 0, 0.2);
    padding: 8px 15px;
    border-radius: 20px;
    margin-top: 10px;
}

.current-period-display {
    font-size: 0.9em;
    font-weight: 600;
}

.save-semester-btn {
    background: var(--accent-color);
    color: var(--header-bg);
    border: none;
    padding: 5px 12px;
    border-radius: 15px;
    font-size: 0.8em;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
}

.save-semester-btn:hover {
    background: #e6c300;
    transform: scale(1.05);
}

.logout-button {
    background: rgba(255, 255, 255, 0.2);
    color: var(--header-text);
    border: 1px solid var(--header-text);
    padding: 8px 16px;
    border-radius: 20px;
    text-decoration: none;
    font-size: 14px;
    transition: all 0.3s ease;
}

.logout-button:hover {
    background: var(--header-text);
    color: var(--header-bg);
}

.tabs {
    display: flex;
    flex-wrap: wrap;
    background: white;
    border-radius: 12px;
    box-shadow: 0 4px 15px rgba(0,0,0,0.08);
    margin-bottom: 20px;
    overflow: hidden;
}

.tab {
    flex-grow: 1;
    padding: 16px 12px;
    background: transparent;
    border: none;
    cursor: pointer;
    font-size: 14px;
    font-weight: 500;
    transition: all 0.3s ease;
    color: var(--secondary-text);
    border-bottom: 3px solid transparent;
    text-align: center;
    min-width: 130px;
}

.tab.hidden {
    display: none;
}

.tab:hover { 
    background: var(--secondary-bg);
    transform: translateY(-2px);
}

.tab.active {
    color: var(--primary-text);
    font-weight: 600;
    border-bottom: 3px solid var(--accent-color);
    background: var(--primary-bg);
}

.tab-content { 
    display: none; 
}

.tab-content.active {
    display: block;
    background: white;
    border-radius: 15px;
    padding: 30px;
    box-shadow: 0 6px 20px rgba(0,0,0,0.1);
    animation: fadeIn 0.5s ease-in;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

.dashboard-controls {
    display: flex;
    flex-wrap: wrap;
    gap: 20px;
    align-items: center;
    margin-bottom: 25px;
    padding: 20px;
    background: linear-gradient(135deg, var(--primary-bg) 0%, var(--secondary-bg) 100%);
    border-radius: 12px;
    border: 1px solid var(--border-color);
}

.control-group { 
    display: flex; 
    align-items: center; 
    gap: 10px; 
}

.control-group label { 
    font-weight: 600; 
    color: var(--secondary-text); 
    min-width: 70px;
}

.control-group select, 
.control-group input, 
.form-control {
    padding: 10px 14px;
    border: 2px solid var(--border-color);
    border-radius: 8px;
    font-size: 14px;
    transition: all 0.3s ease;
    background: white;
}

.semester-nav-btn {
    background: var(--accent-color);
    color: var(--header-bg);
    border: none;
    width: 32px;
    height: 32px;
    border-radius: 6px;
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s ease;
    padding: 0;
}

.semester-nav-btn:hover {
    background: #e6c300;
    transform: scale(1.1);
}

.semester-nav-btn:active {
    transform: scale(0.95);
}

.control-group select:focus,
.control-group input:focus,
.form-control:focus {
    outline: none;
    border-color: var(--accent-color);
    box-shadow: 0 0 0 3px rgba(255, 215, 0, 0.1);
}

.control-group button, 
.action-button,
.btn {
    background: linear-gradient(135deg, var(--accent-color) 0%, #e6c300 100%); 
    color: var(--header-bg); 
    font-weight: 600;
    cursor: pointer; 
    transition: all 0.3s ease; 
    border: none;
    padding: 10px 18px; 
    border-radius: 8px;
    font-size: 14px;
    box-shadow: 0 2px 8px rgba(255, 215, 0, 0.3);
}

.control-group button:hover, 
.action-button:hover,
.btn:hover { 
    background: linear-gradient(135deg, #e6c300 0%, #d4b800 100%);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(255, 215, 0, 0.4);
}

.btn-delete {
    background: linear-gradient(135deg, var(--danger-color) 0%, #c82333 100%); 
    color: white; 
    margin-left: 5px;
}

.btn-delete:hover { 
    background: linear-gradient(135deg, #c82333 0%, #a71e2a 100%);
}

.btn-success {
    background: linear-gradient(135deg, var(--success-color) 0%, #218838 100%);
    color: white;
}

.btn-warning {
    background: linear-gradient(135deg, var(--warning-color) 0%, #e0a800 100%);
    color: var(--header-bg);
}

.btn-info {
    background: linear-gradient(135deg, var(--info-color) 0%, #138496 100%);
    color: white;
}

.btn-secondary {
    background: linear-gradient(135deg, #6c757d 0%, #5a6268 100%);
    color: white;
}

.dashboard-section-header {
    font-size: 1.5em; 
    font-weight: 600; 
    margin: 25px 0 20px;
    padding-bottom: 12px; 
    border-bottom: 3px solid var(--accent-color);
    color: var(--primary-text);
    display: flex;
    align-items: center;
    gap: 10px;
}

.scorecard-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 20px;
    margin-bottom: 30px;
}

.scorecard {
    background: linear-gradient(135deg, white 0%, #f8f9fa 100%);
    padding: 25px;
    border-radius: 12px;
    box-shadow: 0 4px 15px rgba(0,0,0,0.08);
    text-align: center;
    border-left: 5px solid var(--accent-color);
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.scorecard::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--accent-color), #e6c300);
}

.scorecard:hover {
    transform: translateY(-5px) scale(1.02);
    box-shadow: 0 8px 25px rgba(0,0,0,0.15);
}

.scorecard .value { 
    font-size: 2.4em; 
    font-weight: 700; 
    color: var(--primary-text);
    margin-bottom: 8px;
    background: linear-gradient(135deg, var(--primary-text), var(--secondary-text));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.scorecard .label { 
    font-size: 1em; 
    color: var(--secondary-text); 
    font-weight: 500; 
}

/* AM/PM Dashboard Styles */
.ampm-dashboard {
    display: grid;
    grid-template-columns: 1fr 1fr 1fr;
    gap: 20px;
    margin-bottom: 30px;
}

.ampm-section {
    background: linear-gradient(135deg, white 0%, #f8f9fa 100%);
    border-radius: 15px;
    padding: 25px;
    box-shadow: 0 4px 15px rgba(0,0,0,0.08);
    border-left: 5px solid var(--accent-color);
}

.ampm-section h4 {
    margin: 0 0 20px 0;
    color: var(--primary-text);
    font-size: 1.3em;
    font-weight: 600;
    text-align: center;
    padding-bottom: 10px;
    border-bottom: 2px solid var(--accent-color);
}

.enrollment-card {
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.enrollment-value {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 12px 15px;
    background: rgba(255, 255, 255, 0.7);
    border-radius: 10px;
    border-left: 3px solid var(--accent-color);
}

.enrollment-value .value {
    font-size: 1.4em;
    font-weight: 700;
    color: var(--primary-text);
}

.enrollment-value .label {
    font-size: 0.9em;
    color: var(--secondary-text);
    font-weight: 500;
}

.annual-capacity-summary {
    background: linear-gradient(135deg, white 0%, #f8f9fa 100%);
    border-radius: 15px;
    padding: 25px;
    box-shadow: 0 4px 15px rgba(0,0,0,0.08);
    margin-bottom: 30px;
    border-left: 5px solid var(--info-color);
}

.annual-capacity-summary h4 {
    margin: 0 0 20px 0;
    color: var(--primary-text);
    font-size: 1.3em;
    font-weight: 600;
    text-align: center;
    padding-bottom: 10px;
    border-bottom: 2px solid var(--info-color);
}

/* Special styling for Overall Summary section */
.ampm-section:last-child {
    background: linear-gradient(135deg, #e3f2fd 0%, #f3e5f5 100%);
    border-left: 5px solid #2196f3;
    box-shadow: 0 6px 20px rgba(33, 150, 243, 0.15);
}

.ampm-section:last-child h4 {
    color: #1976d2;
    border-bottom: 2px solid #2196f3;
}

.ampm-section:last-child .enrollment-value {
    background: rgba(255, 255, 255, 0.9);
    border-left: 3px solid #2196f3;
}

.ampm-section:last-child .enrollment-value .value {
    color: #1976d2;
    font-weight: 800;
}

/* Responsive design for AM/PM dashboard */
@media (max-width: 768px) {
    .ampm-dashboard {
        grid-template-columns: 1fr;
        gap: 20px;
    }
    
    .ampm-section {
        padding: 20px;
    }
    
    .annual-capacity-summary {
        padding: 20px;
    }
}

.breakdown-grid {
    display: grid;
    gap: 20px;
    margin-bottom: 30px;
}

.breakdown-section {
    background: linear-gradient(135deg, white 0%, #f8f9fa 100%);
    border-radius: 15px;
    padding: 20px;
    box-shadow: 0 4px 15px rgba(0,0,0,0.08);
}

.breakdown-section h4 {
    margin: 0 0 15px 0;
    color: var(--primary-text);
    font-size: 1.2em;
    padding-bottom: 10px;
    border-bottom: 2px solid var(--accent-color);
}

.classroom-breakdown-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 20px;
}

.program-breakdown-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
}

.classroom-card {
    background: linear-gradient(135deg, white 0%, #f8f9fa 100%);
    border-radius: 15px;
    box-shadow: 0 6px 20px rgba(0,0,0,0.08);
    overflow: hidden;
    border-left: 5px solid var(--accent-color);
    transition: all 0.3s ease;
}

.classroom-card:hover {
    transform: translateY(-3px);
    box-shadow: 0 10px 30px rgba(0,0,0,0.15);
}

.classroom-card-header {
    background: linear-gradient(135deg, var(--header-bg) 0%, #495057 100%);
    color: var(--header-text);
    padding: 15px 20px;
    font-weight: 600;
    font-size: 1.1em;
    position: relative;
}

.classroom-card-header::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: var(--accent-color);
}

.schedule-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px 20px;
    border-bottom: 1px solid var(--border-color);
    transition: background 0.3s ease;
}

.schedule-row:hover {
    background: var(--primary-bg);
}

.schedule-row:last-child { 
    border-bottom: none; 
}

.schedule-label { 
    font-weight: 500; 
    color: var(--secondary-text); 
}

.schedule-utilization { 
    font-weight: 600; 
    color: var(--primary-text); 
}

.schedule-utilization-container {
    display: flex;
    align-items: center;
    gap: 10px;
}

/* iPhone-style Toggle Switch */
.toggle-switch {
    position: relative;
    display: inline-block;
    width: 50px;
    height: 30px;
    margin: 0;
}

.toggle-switch input {
    opacity: 0;
    width: 0;
    height: 0;
}

.toggle-slider {
    position: absolute;
    cursor: pointer;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: #ccc;
    transition: 0.3s;
    border-radius: 30px;
}

.toggle-slider:before {
    position: absolute;
    content: "";
    height: 22px;
    width: 22px;
    left: 4px;
    bottom: 4px;
    background-color: white;
    transition: 0.3s;
    border-radius: 50%;
    box-shadow: 0 2px 4px rgba(0,0,0,0.2);
}

.toggle-switch input:checked + .toggle-slider {
    background-color: #34c759;
}

.toggle-switch input:checked + .toggle-slider:before {
    transform: translateX(20px);
}

.toggle-switch input:disabled + .toggle-slider {
    opacity: 0.6;
    cursor: not-allowed;
}

.class-status-label {
    font-size: 0.85em;
    color: var(--secondary-text);
    font-weight: 500;
    min-width: 90px;
    text-align: left;
}

.class-status-label.opened {
    color: #28a745;
    font-weight: 600;
}

.class-status-label.closed {
    color: #dc3545;
    font-weight: 600;
}

.closed-classes-note {
    margin: 15px 0;
}

.closed-classes-alert {
    background: #fff3cd;
    border: 1px solid #ffc107;
    border-left: 4px solid #ffc107;
    border-radius: 8px;
    padding: 12px 15px;
    color: #856404;
    font-size: 0.95em;
    line-height: 1.5;
}

.closed-classes-alert strong {
    color: #856404;
    font-weight: 600;
}

.student-table { 
    width: 100%; 
    border-collapse: collapse; 
    background: white;
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 4px 15px rgba(0,0,0,0.08);
    margin-bottom: 15px;
}

.student-table th,
.student-table td {
    padding: 15px; 
    text-align: left; 
    border-bottom: 1px solid var(--border-color);
    vertical-align: middle;
}

.student-table th { 
    background: linear-gradient(135deg, var(--header-bg) 0%, #495057 100%);
    color: var(--header-text); 
    font-weight: 600;
    position: sticky;
    top: 0;
    z-index: 10;
    cursor: pointer;
    user-select: none;
}

.student-table th:hover {
    background: linear-gradient(135deg, #495057 0%, var(--header-bg) 100%);
}

.student-table th.sorted-asc::after {
    content: ' ↑';
    color: var(--accent-color);
}

.student-table th.sorted-desc::after {
    content: ' ↓';
    color: var(--accent-color);
}

.student-table tr:nth-child(even) { 
    background-color: var(--primary-bg); 
}

.student-table tr:hover {
    background-color: var(--secondary-bg);
    transform: scale(1.01);
    transition: all 0.2s ease;
}

.classroom-container { 
    display: flex; 
    flex-direction: column; 
    gap: 25px; 
}

.classroom-container.side-by-side {
    flex-direction: row;
}

@media (min-width: 1200px) { 
    .classroom-container { 
        flex-direction: row; 
    }
    
    .classroom-container.with-legend {
        flex-direction: row;
    }
    
    .classroom-container.side-by-side .main-content {
        display: grid;
        grid-template-columns: 1fr 1fr;
        gap: 25px;
        flex: 1;
    }
    
    .classroom-container.side-by-side .class-section {
        display: flex;
        flex-direction: column;
    }
}

.main-content { 
    flex: 3; 
}

.sidebar { 
    flex: 1; 
    min-width: 280px; 
}

.schedule-header {
    background: linear-gradient(135deg, var(--secondary-bg) 0%, #dee2e6 100%); 
    color: var(--primary-text); 
    padding: 15px 20px;
    border-radius: 12px; 
    font-size: 1.1em; 
    font-weight: 600;
    display: flex; 
    justify-content: space-between; 
    align-items: center; 
    margin-bottom: 20px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.05);
}

.utilization-badge {
    background: linear-gradient(135deg, var(--accent-color) 0%, #e6c300 100%); 
    padding: 8px 15px; 
    border-radius: 25px;
    font-size: 0.85em; 
    font-weight: 600; 
    color: var(--header-bg);
    box-shadow: 0 2px 8px rgba(255, 215, 0, 0.3);
}

.seat-grid { 
    display: grid; 
    gap: 12px; 
    grid-template-columns: repeat(6, 1fr);
    padding: 25px;
    background: linear-gradient(135deg, var(--primary-bg) 0%, #f1f3f4 100%);
    border-radius: 12px;
    border: 2px solid var(--border-color);
}

.seat {
    aspect-ratio: 1; 
    border: 2px solid var(--border-color); 
    border-radius: 10px;
    display: flex; 
    flex-direction: column; 
    align-items: center; 
    justify-content: center;
    padding: 8px; 
    text-align: center; 
    font-weight: 500; 
    transition: all 0.3s ease;
    position: relative;
    cursor: pointer;
    min-height: 90px;
    background: white;
}

.seat:hover {
    transform: translateY(-3px) scale(1.05);
    box-shadow: 0 6px 20px rgba(0,0,0,0.15);
    z-index: 5;
}

.seat.program-electrolysis { 
    background: linear-gradient(135deg, var(--program-el-bg) 0%, #b3d9ff 100%); 
    border-color: #007bff;
}

.seat.program-facial { 
    background: linear-gradient(135deg, var(--program-fs-bg) 0%, #c3e6cb 100%); 
    border-color: #28a745;
}

.seat.program-medical { 
    background: linear-gradient(135deg, var(--program-ma-bg) 0%, #f5c6cb 100%); 
    border-color: #dc3545;
}

.seat.appointment {
    background: linear-gradient(135deg, var(--appointment-bg) 0%, #ff99ff 100%);
    border-color: #e066e0;
}

.seat.empty { 
    background: linear-gradient(135deg, var(--empty-bg) 0%, #f8f9fa 100%); 
    color: var(--empty-text); 
    border-color: var(--border-color);
}

.seat.historical {
    opacity: 0.7;
    background: linear-gradient(135deg, var(--historical-bg) 0%, #e9ecef 100%);
}

.seat-name { 
    font-size: 12px; 
    font-weight: 600; 
    word-break: break-word;
    line-height: 1.2;
}

.seat-program { 
    font-size: 10px; 
    color: var(--secondary-text); 
    margin-top: 4px; 
    opacity: 0.8;
}

.seat-symbol {
    font-size: 20px;
    margin-bottom: 4px;
}

.transfer-badge {
    position: absolute;
    top: 3px;
    left: 3px;
    background: var(--transfer-color);
    color: white;
    padding: 2px 6px;
    border-radius: 12px;
    font-size: 9px;
    font-weight: bold;
    display: flex;
    align-items: center;
    gap: 2px;
}

.notes-badge {
    position: absolute;
    bottom: 3px;
    right: 3px;
    font-size: 14px;
}

.legend { 
    background: linear-gradient(135deg, var(--primary-bg) 0%, #f1f3f4 100%); 
    padding: 20px; 
    border-radius: 12px; 
    margin-bottom: 20px; 
    border: 1px solid var(--border-color);
    box-shadow: 0 2px 8px rgba(0,0,0,0.05);
}

.legend h4 { 
    margin: 0 0 15px; 
    color: var(--primary-text);
    font-size: 1.1em;
}

.legend-item { 
    display: flex; 
    align-items: center; 
    gap: 10px; 
    margin-bottom: 10px; 
}

.legend-symbol { 
    width: 24px; 
    height: 24px; 
    border-radius: 6px; 
    border: 1px solid var(--border-color); 
    font-size: 12px; 
    line-height: 24px; 
    text-align: center;
    font-weight: bold;
}

.horizontal-legend {
    display: flex;
    gap: 20px;
    align-items: center;
    background: linear-gradient(135deg, var(--primary-bg) 0%, #f1f3f4 100%);
    padding: 10px 20px;
    border-radius: 8px;
    border: 1px solid var(--border-color);
    margin-left: auto;
}

.horizontal-legend .legend-item {
    margin: 0;
    gap: 5px;
    font-size: 0.85em;
}

.horizontal-legend .legend-symbol {
    width: 20px;
    height: 20px;
    font-size: 10px;
    line-height: 20px;
}

.add-student-form {
    background: linear-gradient(135deg, var(--primary-bg) 0%, #f1f3f4 100%);
    padding: 25px;
    border-radius: 12px;
    margin-bottom: 25px;
    border: 2px dashed var(--accent-color);
}

.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 600;
    color: var(--primary-text);
}

.form-group textarea {
    width: 100%;
    padding: 10px;
    border: 2px solid var(--border-color);
    border-radius: 8px;
    font-size: 14px;
    font-family: inherit;
    resize: vertical;
    min-height: 100px;
}

.form-group textarea:focus {
    outline: none;
    border-color: var(--accent-color);
    box-shadow: 0 0 0 3px rgba(255, 215, 0, 0.1);
}

.checkbox-group {
    display: flex;
    gap: 20px;
    align-items: center;
    margin: 15px 0;
}

.checkbox-group label {
    display: flex;
    align-items: center;
    gap: 8px;
    font-weight: 500;
    cursor: pointer;
}

.checkbox-group input[type="checkbox"] {
    width: 18px;
    height: 18px;
    cursor: pointer;
}

.modal {
    display: none;
    position: fixed;
    z-index: 1000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0,0,0,0.6);
    backdrop-filter: blur(5px);
}

.modal-content {
    background: linear-gradient(135deg, white 0%, #f8f9fa 100%);
    margin: 2% auto;
    padding: 35px;
    border-radius: 20px;
    width: 90%;
    max-width: 600px;
    max-height: 90vh;
    overflow-y: auto;
    box-shadow: 0 15px 40px rgba(0,0,0,0.3);
    animation: modalSlideIn 0.3s ease-out;
    position: relative;
}

@keyframes modalSlideIn {
    from { opacity: 0; transform: translateY(-50px) scale(0.9); }
    to { opacity: 1; transform: translateY(0) scale(1); }
}

.modal h3 {
    margin-top: 0;
    color: var(--primary-text);
    font-size: 1.3em;
    margin-bottom: 20px;
}

.modal-form {
    display: flex;
    flex-direction: column;
    gap: 18px;
    max-height: calc(90vh - 200px);
    overflow-y: auto;
    padding-right: 10px;
}

.modal-form label {
    font-weight: 600;
    color: var(--secondary-text);
}

.modal-form input, 
.modal-form select,
.modal-form textarea {
    padding: 12px;
    border: 2px solid var(--border-color);
    border-radius: 8px;
    font-size: 16px;
    transition: all 0.3s ease;
}

.modal-form input:focus, 
.modal-form select:focus,
.modal-form textarea:focus {
    outline: none;
    border-color: var(--accent-color);
    box-shadow: 0 0 0 3px rgba(255, 215, 0, 0.1);
}

.modal-form textarea {
    font-family: inherit;
    resize: vertical;
    min-height: 100px;
}

.modal-buttons {
    display: flex;
    gap: 12px;
    justify-content: flex-end;
    margin-top: 25px;
}

.modal-buttons button {
    padding: 12px 24px;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    font-weight: 600;
    transition: all 0.3s ease;
    font-size: 14px;
}

.settings-container {
    display: grid;
    gap: 30px;
}

.settings-section {
    background: linear-gradient(135deg, white 0%, #f8f9fa 100%);
    border-radius: 15px;
    padding: 30px;
    box-shadow: 0 6px 20px rgba(0,0,0,0.08);
    border-left: 5px solid var(--accent-color);
}

.settings-section h3 {
    margin: 0 0 25px 0;
    color: var(--primary-text);
    font-size: 1.3em;
    padding-bottom: 15px;
    border-bottom: 2px solid var(--accent-color);
    display: flex;
    align-items: center;
    gap: 10px;
}

.settings-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 25px;
}

.settings-card {
    background: linear-gradient(135deg, var(--primary-bg) 0%, #f1f3f4 100%);
    padding: 25px;
    border-radius: 12px;
    border: 1px solid var(--border-color);
}

.settings-card h4 {
    margin: 0 0 20px;
    color: var(--primary-text);
    font-size: 1.1em;
    display: flex;
    align-items: center;
    gap: 8px;
}

.settings-checkbox {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 15px;
    padding: 10px;
    background: white;
    border-radius: 8px;
    border: 1px solid var(--border-color);
}

.settings-checkbox input[type="checkbox"] {
    width: 20px;
    height: 20px;
    cursor: pointer;
}

.settings-checkbox label {
    flex: 1;
    cursor: pointer;
    font-weight: 500;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.settings-checkbox small {
    color: var(--secondary-text);
    font-weight: normal;
    font-size: 0.85em;
}

.historical-indicator {
    background: var(--graduated-color);
    color: white;
    padding: 2px 6px;
    border-radius: 4px;
    font-size: 0.7em;
    margin-left: 5px;
}

.reporting-section {
    background: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%);
    padding: 25px;
    border-radius: 12px;
    margin-bottom: 25px;
    border: 1px solid var(--border-color);
}

.chart-container {
    background: white;
    padding: 20px;
    border-radius: 8px;
    margin: 15px 0;
    box-shadow: 0 2px 8px rgba(0,0,0,0.05);
}

.chart-bars {
    display: flex;
    align-items: end;
    height: 200px;
    gap: 10px;
    margin: 20px 0;
    padding: 20px;
    background: #f8f9fa;
    border-radius: 8px;
}

.chart-bar {
    flex: 1;
    background: linear-gradient(135deg, var(--accent-color), #e6c300);
    border-radius: 4px 4px 0 0;
    position: relative;
    transition: all 0.3s ease;
    min-height: 20px;
}

.chart-bar:hover {
    transform: scale(1.05);
    box-shadow: 0 4px 12px rgba(255, 215, 0, 0.4);
}

.chart-bar-label {
    position: absolute;
    bottom: -25px;
    left: 50%;
    transform: translateX(-50%);
    font-size: 11px;
    font-weight: 600;
    color: var(--secondary-text);
}

.chart-bar-value {
    position: absolute;
    top: -20px;
    left: 50%;
    transform: translateX(-50%);
    font-size: 12px;
    font-weight: 600;
    color: var(--primary-text);
}

.settings-button-group {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 15px;
}

.settings-button {
    padding: 15px 20px;
    border: none;
    border-radius: 10px;
    font-size: 15px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    box-shadow: 0 4px 12px rgba(0,0,0,0.1);
    text-align: center;
}

.settings-button:hover {
    transform: translateY(-3px);
    box-shadow: 0 6px 20px rgba(0,0,0,0.2);
}

.settings-button.export {
    background: linear-gradient(135deg, var(--info-color), #138496);
    color: white;
}

.settings-button.import {
    background: linear-gradient(135deg, var(--success-color), #218838);
    color: white;
}

.settings-button.backup {
    background: linear-gradient(135deg, var(--warning-color), #e0a800);
    color: var(--header-bg);
}

.settings-button.reset {
    background: linear-gradient(135deg, var(--danger-color), #c82333);
    color: white;
}

.student-edit-row {
    background: #fff3cd !important;
    border: 2px solid var(--warning-color);
}

.enrollment-data-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 15px;
    margin: 15px 0;
}

.enrollment-data-item {
    background: white;
    padding: 15px;
    border-radius: 8px;
    border: 1px solid var(--border-color);
}

.enrollment-data-item label {
    display: block;
    font-size: 12px;
    color: var(--secondary-text);
    margin-bottom: 5px;
    font-weight: 600;
}

.enrollment-data-item input,
.enrollment-data-item select,
.enrollment-data-item textarea {
    width: 100%;
    padding: 8px;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    font-size: 14px;
}

.enrollment-data-item textarea {
    resize: vertical;
    min-height: 60px;
}

.loading {
    display: inline-block;
    opacity: 0.6;
    pointer-events: none;
}

.error-message {
    background: #f8d7da;
    color: #721c24;
    padding: 10px;
    border-radius: 5px;
    margin: 10px 0;
    border: 1px solid #f5c6cb;
    position: fixed;
    top: 20px;
    right: 20px;
    z-index: 2000;
    max-width: 400px;
}

.success-message {
    background: #d4edda;
    color: #155724;
    padding: 10px;
    border-radius: 5px;
    margin: 10px 0;
    border: 1px solid #c3e6cb;
    position: fixed;
    top: 20px;
    right: 20px;
    z-index: 2000;
    max-width: 400px;
}

.class-name-input {
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: 10px;
    align-items: center;
    margin-bottom: 10px;
}

.class-name-input label {
    font-weight: 500;
    color: var(--secondary-text);
}

.backup-list {
    background: white;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    max-height: 300px;
    overflow-y: auto;
    margin: 15px 0;
}

.backup-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 12px 15px;
    border-bottom: 1px solid var(--border-color);
    transition: background 0.3s ease;
}

.backup-item:hover {
    background: var(--primary-bg);
}

.backup-item:last-child {
    border-bottom: none;
}

.backup-info {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.backup-name {
    font-weight: 600;
    color: var(--primary-text);
}

.backup-date {
    font-size: 0.9em;
    color: var(--secondary-text);
}

.backup-actions {
    display: flex;
    gap: 8px;
}

.backup-actions button {
    padding: 6px 12px;
    font-size: 12px;
    border-radius: 4px;
}

footer {
    text-align: center; 
    margin-top: 50px; 
    padding-top: 25px;
    border-top: 2px solid var(--accent-color); 
    font-size: 14px; 
    color: var(--secondary-text);
}

footer a { 
    color: var(--primary-text); 
    text-decoration: none; 
    font-weight: 500;
    transition: color 0.3s ease;
}

footer a:hover {
    color: var(--accent-color);
}

@media (max-width: 768px) {
    .container {
        padding: 5px;
    }
    
    .header {
        flex-direction: column;
        text-align: center;
    }
    
    .header-logo {
        margin: 0 0 10px 0;
    }
    
    .header-content {
        width: 100%;
    }
    
    .current-period-section {
        justify-content: center;
    }
    
    .modal-content {
        margin: 1% auto;
        width: 95%;
        max-height: 95vh;
        padding: 20px;
    }

    .modal-form {
        max-height: calc(95vh - 150px);
    }

    .header h1 {
        font-size: 1.4em;
    }
    
    .header p {
        font-size: 1em;
    }
    
    .logout-button {
        position: static;
        margin-top: 10px;
    }
    
    .tab {
        font-size: 12px;
        padding: 12px 8px;
        min-width: 100px;
    }
    
    .dashboard-controls {
        flex-direction: column;
        align-items: stretch;
    }
    
    .control-group {
        flex-direction: column;
        align-items: stretch;
    }
    
    .control-group label {
        min-width: auto;
        margin-bottom: 5px;
    }
    
    .seat-grid {
        grid-template-columns: repeat(4, 1fr);
        gap: 8px;
        padding: 15px;
    }
    
    .seat {
        min-height: 70px;
        font-size: 11px;
    }
    
    .classroom-breakdown-grid,
    .program-breakdown-grid,
    .settings-grid {
        grid-template-columns: 1fr;
    }
    
    .scorecard-container {
        grid-template-columns: 1fr 1fr;
    }
    
    .classroom-container {
        flex-direction: column;
    }
    
    .classroom-container.side-by-side .main-content {
        display: block;
    }
    
    .schedule-header {
        flex-direction: column;
        gap: 10px;
        text-align: center;
    }
    
    .utilization-badge {
        align-self: center;
    }
    
    .horizontal-legend {
        flex-wrap: wrap;
        margin-top: 10px;
    }
}

@media (max-width: 480px) {
    body {
        padding: 5px;
    }
    
    .header {
        padding: 15px;
    }
    
    .tab-content {
        padding: 15px;
    }
    
    .seat-grid {
        grid-template-columns: repeat(3, 1fr);
        gap: 6px;
        padding: 10px;
    }

    .scorecard-container {
        grid-template-columns: 1fr;
    }
    
    .seat {
        min-height: 60px;
        font-size: 10px;
    }
    
    .modal-content {
        width: 95%;
        padding: 20px;
        margin: 5% auto;
    }
}

/* LOA Badge Styles */
.loa-badge {
    position: absolute;
    bottom: 4px;
    left: 4px;
    background: #e17055;
    color: white;
    font-size: 9px;
    padding: 2px 6px;
    border-radius: 12px;
    font-weight: bold;
    display: flex;
    align-items: center;
    gap: 2px;
}