:root {
    --primary-color: #2196F3;
    --secondary-color: #1976D2;
    --success-color: #4CAF50;
    --warning-color: #FF9800;
    --danger-color: #F44336;
    --info-color: #00BCD4;
    --light-color: #f8f9fa;
    --dark-color: #212529;
    --gray-color: #6c757d;
    --border-radius: 10px;
    --box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
    --attendance-present: #4CAF50;
    --attendance-absent: #F44336;
    --attendance-late: #FFC107;
    --attendance-excused: #2196F3;
}

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

body {
    background-color: #f5f7fb;
    color: var(--dark-color);
    line-height: 1.6;
    <?php if ($current_lang === 'ar'): ?>
    font-family: 'Cairo', sans-serif;
    <?php else: ?>
    font-family: 'Inter', sans-serif;
    <?php endif; ?>
    padding: 0;
    margin: 0;
}

.container {
    width: 100%;
    max-width: 1400px;
    margin: 0 auto;
    padding: 20px;
}

header {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
    padding: 20px;
    border-radius: var(--border-radius);
    margin-bottom: 30px;
    box-shadow: var(--box-shadow);
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 15px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 15px;
}

.logo i {
    font-size: 2.5rem;
}

.logo h1 {
    font-size: 1.8rem;
    font-weight: 700;
}

.logo span {
    font-size: 1rem;
    opacity: 0.9;
}

.user-info {
    display: flex;
    align-items: center;
    gap: 15px;
    background: rgba(255,255,255,0.2);
    padding: 8px 15px;
    border-radius: 30px;
}

.stats {
    display: flex;
    gap: 15px;
    margin-top: 20px;
    flex-wrap: wrap;
}

.stat-box {
    background-color: rgba(255, 255, 255, 0.2);
    padding: 15px;
    border-radius: var(--border-radius);
    text-align: center;
    min-width: 120px;
    flex: 1;
}

.stat-box h3 {
    font-size: 1.8rem;
    margin-bottom: 5px;
}

.stat-box p {
    font-size: 0.9rem;
}

.main-content {
    display: grid;
    grid-template-columns: 250px 1fr;
    gap: 30px;
}

@media (max-width: 1024px) {
    .main-content {
grid-template-columns: 1fr;
    }
}

.sidebar {
    background-color: white;
    border-radius: var(--border-radius);
    padding: 20px;
    box-shadow: var(--box-shadow);
    height: fit-content;
}

.sidebar-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
    padding-bottom: 15px;
    border-bottom: 1px solid #eee;
}

.lecturer-info {
    background-color: #E3F2FD;
    padding: 15px;
    border-radius: var(--border-radius);
    margin-bottom: 20px;
    text-align: center;
}

.lecturer-info h4 {
    color: var(--primary-color);
    margin-bottom: 5px;
}

.lecturer-info p {
    color: #666;
    font-size: 0.9rem;
    margin-bottom: 10px;
}

.nav-menu {
    list-style: none;
    margin-top: 20px;
}

.nav-menu li {
    margin-bottom: 10px;
}

.nav-menu a {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 12px 15px;
    color: var(--dark-color);
    text-decoration: none;
    border-radius: var(--border-radius);
    transition: all 0.3s ease;
}

.nav-menu a:hover, .nav-menu a.active {
    background-color: var(--primary-color);
    color: white;
}

.content-area {
    display: flex;
    flex-direction: column;
    gap: 30px;
}

.section {
    background-color: white;
    border-radius: var(--border-radius);
    padding: 25px;
    box-shadow: var(--box-shadow);
    display: none;
}

.section.active {
    display: block;
}

.section-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 25px;
    padding-bottom: 15px;
    border-bottom: 1px solid #eee;
    flex-wrap: wrap;
    gap: 15px;
}

.section-header h2 {
    color: var(--primary-color);
    font-size: 1.5rem;
}

.btn {
    padding: 10px 20px;
    border: none;
    border-radius: var(--border-radius);
    cursor: pointer;
    font-weight: 600;
    transition: all 0.3s ease;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    <?php if ($current_lang !== 'ar'): ?>
    font-family: 'Inter', sans-serif;
    <?php endif; ?>
}

.btn-primary {
    background-color: var(--primary-color);
    color: white;
}

.btn-primary:hover {
    background-color: var(--secondary-color);
}

.btn-success {
    background-color: var(--success-color);
    color: white;
}

.btn-warning {
    background-color: var(--warning-color);
    color: white;
}

.btn-danger {
    background-color: var(--danger-color);
    color: white;
}

.btn-info {
    background-color: var(--info-color);
    color: white;
}

.btn-image {
    background-color: #9C27B0;
    color: white;
}

.btn-image:hover {
    background-color: #7B1FA2;
}

.btn-small {
    padding: 5px 10px;
    font-size: 0.85rem;
}

.btn-logout {
    background-color: rgba(255, 255, 255, 0.3);
    color: white;
    border: 1px solid rgba(255,255,255,0.5);
}

.btn-logout:hover {
    background-color: rgba(255, 255, 255, 0.5);
}

.login-section {
    background-color: rgba(255, 255, 255, 0.1);
    border-radius: 15px;
    padding: 30px;
    margin-bottom: 30px;
    backdrop-filter: blur(10px);
}

.login-tabs {
    display: flex;
    justify-content: center;
    gap: 20px;
    margin-bottom: 30px;
}

.login-tab {
    padding: 15px 40px;
    background-color: rgba(255, 255, 255, 0.2);
    border-radius: 30px;
    cursor: pointer;
    transition: all 0.3s ease;
    font-size: 1.2rem;
    font-weight: 600;
    color: white;
}

.login-tab.active {
    background-color: white;
    color: #667eea;
}

.login-form {
    display: none;
}

.login-form.active {
    display: block;
}

.login-form h3 {
    font-size: 1.5rem;
    margin-bottom: 20px;
    color: white;
}

.login-input {
    width: 100%;
    max-width: 300px;
    padding: 15px;
    margin: 10px auto;
    border: 2px solid rgba(255, 255, 255, 0.5);
    border-radius: 30px;
    background-color: rgba(255, 255, 255, 0.1);
    color: white;
    font-size: 1.2rem;
    text-align: center;
    direction: ltr;
    display: block;
}

.login-input::placeholder {
    color: rgba(255, 255, 255, 0.7);
}

.login-btn {
    padding: 15px 50px;
    margin-top: 20px;
    background-color: white;
    color: #667eea;
    border: none;
    border-radius: 30px;
    font-size: 1.2rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
}

.login-btn:hover {
    transform: scale(1.05);
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.2);
}

.pin-input-container {
    margin: 20px 0;
}

.pin-input {
    text-align: center;
    font-size: 1.5rem;
    letter-spacing: 8px;
    direction: ltr;
    padding: 15px;
    border: 2px solid var(--primary-color);
    border-radius: var(--border-radius);
    width: 100%;
    max-width: 300px;
    margin: 0 auto;
}

.pin-info {
    margin-top: 20px;
    color: #4CAF50;
    font-weight: 600;
    padding: 15px;
    background-color: #E8F5E9;
    border-radius: var(--border-radius);
    border-right: 4px solid #4CAF50;
}

.table-container {
    overflow-x: auto;
    margin-top: 20px;
}

table {
    width: 100%;
    border-collapse: collapse;
    min-width: 600px;
}

th, td {
    padding: 12px 15px;
    border-bottom: 1px solid #ddd;
    text-align: <?php echo $current_lang === 'ar' ? 'right' : 'left'; ?>;
}

th {
    background-color: #f8f9fa;
    color: var(--primary-color);
    font-weight: 600;
}

tr:hover {
    background-color: #f8f9fa;
}

.action-buttons {
    display: flex;
    gap: 5px;
    flex-wrap: wrap;
}

.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    z-index: 1000;
    justify-content: center;
    align-items: center;
}

.modal-content {
    background-color: white;
    border-radius: var(--border-radius);
    width: 90%;
    max-width: 700px;
    max-height: 90vh;
    overflow-y: auto;
    padding: 30px;
    position: relative;
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
    padding-bottom: 15px;
    border-bottom: 1px solid #eee;
}

.close-modal {
    background: none;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
    color: var(--gray-color);
    padding: 5px 10px;
    border-radius: 5px;
}

.close-modal:hover {
    background-color: #f0f0f0;
    color: #000;
}

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

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

.form-control {
    width: 100%;
    padding: 12px 15px;
    border: 1px solid #ddd;
    border-radius: var(--border-radius);
    font-size: 1rem;
    <?php if ($current_lang !== 'ar'): ?>
    font-family: 'Inter', sans-serif;
    <?php endif; ?>
}

.form-control:focus {
    border-color: var(--primary-color);
    outline: none;
    box-shadow: 0 0 0 3px rgba(33, 150, 243, 0.1);
}

.form-control.error {
    border-color: var(--danger-color);
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
}

@media (max-width: 768px) {
    .form-row {
grid-template-columns: 1fr;
    }
    
    .section-header {
flex-direction: column;
align-items: flex-start;
    }
    
    .header-content {
flex-direction: column;
align-items: flex-start;
    }
    
    .stats {
width: 100%;
    }
}

.dashboard-cards {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
    gap: 20px;
    margin-bottom: 30px;
}

.card {
    background-color: white;
    border-radius: var(--border-radius);
    padding: 20px;
    box-shadow: var(--box-shadow);
    transition: transform 0.3s ease;
    border: 1px solid #eee;
}

.card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.15);
}

.card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 15px;
}

.card-header h3 {
    font-size: 1.2rem;
    color: var(--primary-color);
}

.card-content {
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--dark-color);
}

.card-footer {
    margin-top: 15px;
    color: var(--gray-color);
    font-size: 0.9rem;
}

.status-badge {
    display: inline-block;
    padding: 5px 10px;
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: 600;
}

.status-badge.active {
    background-color: #E8F5E9;
    color: #2E7D32;
}

.status-badge.inactive {
    background-color: #FFEBEE;
    color: #C62828;
}

.status-badge.warning {
    background-color: #FFF3E0;
    color: #EF6C00;
}

.loader {
    border: 4px solid #f3f3f3;
    border-top: 4px solid var(--primary-color);
    border-radius: 50%;
    width: 40px;
    height: 40px;
    animation: spin 1s linear infinite;
    margin: 20px auto;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

.message {
    position: fixed;
    top: 20px;
    <?php echo $current_lang === 'ar' ? 'right' : 'left'; ?>: 20px;
    <?php echo $current_lang === 'ar' ? 'left' : 'right'; ?>: 20px;
    max-width: 500px;
    margin: 0 auto;
    padding: 15px 20px;
    background-color: #d4edda;
    color: #155724;
    border: 1px solid #c3e6cb;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    z-index: 9999;
    text-align: center;
    font-weight: 600;
    animation: slideIn 0.3s ease;
}

@keyframes slideIn {
    from {
transform: translateY(-100%);
opacity: 0;
    }
    to {
transform: translateY(0);
opacity: 1;
    }
}

.message.error {
    background-color: #f8d7da;
    color: #721c24;
    border-color: #f5c6cb;
}

.message.warning {
    background-color: #fff3cd;
    color: #856404;
    border-color: #ffeeba;
}

.message.info {
    background-color: #d1ecf1;
    color: #0c5460;
    border-color: #bee5eb;
}

.lecturers-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 20px;
    margin-top: 30px;
}

.lecturer-card {
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.2);
    color: white;
    padding: 25px;
    border-radius: 15px;
    text-align: center;
    cursor: pointer;
    transition: all 0.3s ease;
    backdrop-filter: blur(5px);
}

.lecturer-card:hover {
    background: rgba(255, 255, 255, 0.2);
    transform: translateY(-5px);
}

.lecturer-card i {
    font-size: 3rem;
    margin-bottom: 15px;
}

.lecturer-card h3 {
    font-size: 1.2rem;
    margin-bottom: 10px;
}

.lecturer-card small {
    display: block;
    font-size: 0.8rem;
    opacity: 0.8;
    margin-top: 5px;
}

.employee-number-badge {
    display: inline-block;
    padding: 2px 6px;
    background-color: #E3F2FD;
    color: #1976D2;
    border-radius: 12px;
    font-size: 0.7rem;
    font-weight: 600;
    margin-<?php echo $current_lang === 'ar' ? 'left' : 'right'; ?>: 5px;
}

.pin-badge {
    display: inline-block;
    padding: 2px 6px;
    background-color: #E8F5E9;
    color: #2E7D32;
    border-radius: 12px;
    font-size: 0.7rem;
    font-weight: 600;
    margin-<?php echo $current_lang === 'ar' ? 'left' : 'right'; ?>: 5px;
}

/* Language selector */
.language-selector {
    position: absolute;
    top: 20px;
    <?php echo $current_lang === 'ar' ? 'left' : 'right'; ?>: 20px;
    display: flex;
    gap: 5px;
    z-index: 100;
}

.lang-btn {
    padding: 5px 10px;
    background: rgba(255, 255, 255, 0.2);
    color: white;
    text-decoration: none;
    border-radius: 5px;
    font-size: 0.85rem;
    transition: all 0.3s ease;
}

.lang-btn:hover, .lang-btn.active {
    background: white;
    color: var(--primary-color);
}

/* Lecturer selection screen */
.lecturer-selection {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    padding: 20px;
    position: relative;
}

.lecturer-selection .container {
    max-width: 800px;
    text-align: center;
    color: white;
}

.lecturer-selection h1 {
    font-size: 2.5rem;
    margin-bottom: 10px;
}

.lecturer-selection p {
    font-size: 1.1rem;
    opacity: 0.9;
    margin-bottom: 40px;
}

/* Student cards */
.student-card {
    display: flex;
    align-items: center;
    padding: 12px;
    margin-bottom: 8px;
    border: 1px solid #dee2e6;
    border-radius: var(--border-radius);
    background-color: #ffffff;
    transition: all 0.2s ease;
    cursor: pointer;
}

.student-card.selected {
    background-color: #f0f9f0;
    border-color: var(--success-color);
}

.student-card:hover {
    box-shadow: 0 2px 8px rgba(0,0,0,0.1);
}

.student-card input[type="checkbox"] {
    margin-<?php echo $current_lang === 'ar' ? 'left' : 'right'; ?>: 15px;
    width: 20px;
    height: 20px;
    cursor: pointer;
}

.student-badge {
    background-color: #6c757d;
    color: white;
    padding: 2px 8px;
    border-radius: 12px;
    font-size: 0.7rem;
}

.student-badge.selected {
    background-color: var(--success-color);
}

.students-grid-container {
    max-height: 400px;
    overflow-y: auto;
    border: 1px solid #dee2e6;
    border-radius: var(--border-radius);
    padding: 10px;
    -webkit-overflow-scrolling: touch;
}

.stats-badge {
    background-color: #e9ecef;
    padding: 2px 8px;
    border-radius: 12px;
    font-size: 0.7rem;
}

/* Mobile responsive */
@media (max-width: 768px) {
    .btn {
padding: 8px 12px;
font-size: 0.9rem;
    }
    
    .btn-small {
padding: 4px 8px;
font-size: 0.75rem;
    }
    
    .modal-content {
width: 95%;
padding: 15px;
margin: 10px;
    }
    
    .student-card {
padding: 8px;
    }
    
    .student-card input[type="checkbox"] {
width: 18px;
height: 18px;
margin-<?php echo $current_lang === 'ar' ? 'left' : 'right'; ?>: 8px;
    }
    
    .stats {
gap: 8px;
    }
    
    .stat-box {
padding: 10px;
    }
    
    .stat-box h3 {
font-size: 1.2rem;
    }
    
    .dashboard-cards {
grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
gap: 10px;
    }
    
    .card {
padding: 15px;
    }
    
    .card-content {
font-size: 1.4rem;
    }
    
    .action-buttons {
flex-direction: column;
gap: 3px;
    }
    
    .action-buttons .btn-small {
width: 100%;
    }
    
    .form-row {
grid-template-columns: 1fr;
gap: 10px;
    }
    
    .card:hover {
transform: none;
    }
    
    .btn:hover {
transform: none;
    }
    
    .login-tab {
padding: 10px 20px;
font-size: 1rem;
    }
    
    .login-input {
max-width: 100%;
padding: 12px;
    }
    
    .lecturers-grid {
grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
gap: 10px;
    }
    
    .lecturer-card {
padding: 15px;
    }
    
    .lecturer-card i {
font-size: 2rem;
    }
    
    .students-grid-container {
max-height: 300px;
    }
}

/* Footer styles */
footer {
    margin-top: 30px;
    padding: 20px;
    background-color: white;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    text-align: center;
    color: var(--gray-color);
}

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

footer a:hover {
    color: var(--secondary-color);
    text-decoration: underline;
}

@media (max-width: 768px) {
    footer > div {
        flex-direction: column;
        gap: 10px;
    }
}