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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: #f8f9fa;
}

a {
    text-decoration: none;
    color: #3498db;
}

a:hover {
    color: #2980b9;
}

/* Header Styles */
header {
    background: linear-gradient(135deg, #2c3e50 0%, #3498db 100%);
    color: white;
    padding: 1rem 0;
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
}

.header-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

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

.logo img {
    height: 50px;
    margin-right: 15px;
}

.logo h1 {
    font-size: 1.8rem;
    font-weight: 600;
    color: white;
}

.main-nav ul {
    display: flex;
    list-style: none;
}

.main-nav li {
    margin: 0 15px;
}

.main-nav a {
    color: white;
    font-weight: 500;
    padding: 5px 10px;
    border-radius: 4px;
    transition: background-color 0.3s;
}

.main-nav a:hover {
    background-color: rgba(255,255,255,0.1);
}

.user-menu {
    position: relative;
    display: flex;
    align-items: center;
    cursor: pointer;
}

.user-menu img {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    margin-right: 10px;
    object-fit: cover;
    border: 2px solid white;
}

.user-menu span {
    color: white;
    font-weight: 500;
}

.dropdown {
    position: absolute;
    top: 100%;
    right: 0;
    background: white;
    color: #333;
    border-radius: 4px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    display: none;
    min-width: 150px;
    z-index: 1000;
}

.dropdown a {
    display: block;
    padding: 10px 15px;
    color: #333;
    transition: background-color 0.3s;
}

.dropdown a:hover {
    background-color: #f8f9fa;
}

.user-menu:hover .dropdown {
    display: block;
}

/* Main Content */
main {
    max-width: 1200px;
    margin: 20px auto;
    padding: 0 20px;
    min-height: calc(100vh - 200px);
}

/* Footer Styles */
footer {
    background: #2c3e50;
    color: white;
    padding: 30px 0 10px;
}

.footer-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

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

.footer-section h3 {
    margin-bottom: 15px;
    font-size: 1.2rem;
    color: #3498db;
}

.footer-section ul {
    list-style: none;
}

.footer-section li {
    margin-bottom: 8px;
}

.footer-section a {
    color: #ddd;
    transition: color 0.3s;
}

.footer-section a:hover {
    color: white;
}

.footer-bottom {
    text-align: center;
    padding-top: 20px;
    border-top: 1px solid rgba(255,255,255,0.1);
    color: #ddd;
}

/* Auth Styles */
.auth-container {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 80vh;
    padding: 20px;
}

.auth-form {
    background: white;
    padding: 30px;
    border-radius: 8px;
    box-shadow: 0 2px 20px rgba(0,0,0,0.1);
    width: 100%;
    max-width: 400px;
}

.auth-form h2 {
    text-align: center;
    margin-bottom: 20px;
    color: #2c3e50;
}

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

.form-group label {
    display: block;
    margin-bottom: 5px;
    font-weight: 500;
    color: #2c3e50;
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 10px;
    border: 1px solid #ddd;
    border-radius: 4px;
    font-size: 16px;
    transition: border-color 0.3s;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: #3498db;
    box-shadow: 0 0 0 2px rgba(52, 152, 219, 0.2);
}

.btn {
    display: inline-block;
    padding: 10px 20px;
    background: #3498db;
    color: white;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    font-size: 16px;
    font-weight: 500;
    transition: background-color 0.3s;
    text-align: center;
}

.btn:hover {
    background: #2980b9;
    color: white;
}

.btn-primary {
    background: #e74c3c;
}

.btn-primary:hover {
    background: #c0392b;
}

.btn-success {
    background: #27ae60;
}

.btn-success:hover {
    background: #219653;
}

.btn-block {
    display: block;
    width: 100%;
}

.btn-sm {
    padding: 5px 10px;
    font-size: 14px;
}

.auth-link {
    text-align: center;
    margin-top: 20px;
}

.auth-link a {
    color: #3498db;
}

.auth-link a:hover {
    color: #2980b9;
}

.error-message {
    background: #f8d7da;
    color: #721c24;
    padding: 10px;
    border-radius: 4px;
    margin-bottom: 20px;
    border: 1px solid #f5c6cb;
}

.success-message {
    background: #d4edda;
    color: #155724;
    padding: 10px;
    border-radius: 4px;
    margin-bottom: 20px;
    border: 1px solid #c3e6cb;
}

/* Dashboard Styles */
.dashboard h1 {
    margin-bottom: 20px;
    color: #2c3e50;
    border-bottom: 2px solid #3498db;
    padding-bottom: 10px;
}

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

.stat-card {
    background: white;
    padding: 20px;
    border-radius: 8px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    display: flex;
    align-items: center;
    transition: transform 0.3s;
}

.stat-card:hover {
    transform: translateY(-5px);
}

.stat-icon {
    background: #3498db;
    color: white;
    width: 60px;
    height: 60px;
    border-radius: 50%;
    display: flex;
    justify-content: center;
    align-items: center;
    margin-right: 15px;
    font-size: 24px;
}

.stat-info h3 {
    font-size: 28px;
    margin-bottom: 5px;
    color: #2c3e50;
}

.stat-info p {
    color: #7f8c8d;
    font-weight: 500;
}

.dashboard-content {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 30px;
}

.recent-activities,
.quick-actions {
    background: white;
    padding: 20px;
    border-radius: 8px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}

.recent-activities h2,
.quick-actions h2 {
    margin-bottom: 20px;
    color: #2c3e50;
    padding-bottom: 10px;
    border-bottom: 2px solid #f1f2f6;
}

.activity-item {
    display: flex;
    align-items: flex-start;
    padding: 15px 0;
    border-bottom: 1px solid #f1f2f6;
}

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

.activity-icon {
    background: #f1f2f6;
    color: #7f8c8d;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    display: flex;
    justify-content: center;
    align-items: center;
    margin-right: 15px;
    font-size: 16px;
}

.activity-details p {
    margin-bottom: 5px;
}

.activity-time {
    font-size: 12px;
    color: #7f8c8d;
}

.action-buttons {
    display: grid;
    grid-template-columns: 1fr;
    gap: 15px;
}

.action-btn {
    display: flex;
    align-items: center;
    padding: 15px;
    background: #f8f9fa;
    border-radius: 8px;
    transition: background-color 0.3s, transform 0.2s;
}

.action-btn:hover {
    background: #e9ecef;
    transform: translateY(-2px);
}

.action-btn i {
    font-size: 20px;
    margin-right: 10px;
    color: #3498db;
}

/* Table Styles */
.data-table {
    width: 100%;
    border-collapse: collapse;
    margin: 20px 0;
    background: white;
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}

.data-table th,
.data-table td {
    padding: 12px 15px;
    text-align: left;
    border-bottom: 1px solid #f1f2f6;
}

.data-table th {
    background: #3498db;
    color: white;
    font-weight: 600;
}

.data-table tr:hover {
    background: #f8f9fa;
}

.data-table tr.course-summary {
    background: #e8f4fc;
    font-weight: 600;
}

.table-actions {
    display: flex;
    gap: 10px;
}

.action-icon {
    padding: 5px;
    border-radius: 4px;
    color: white;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 30px;
    height: 30px;
    cursor: pointer;
}

.edit-icon {
    background: #3498db;
}

.delete-icon {
    background: #e74c3c;
}

.view-icon {
    background: #27ae60;
}

/* Form Styles */
.form-container {
    background: white;
    padding: 20px;
    border-radius: 8px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    margin-bottom: 20px;
}

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

@media (max-width: 768px) {
    .form-row {
        grid-template-columns: 1fr;
    }
}

.content-section {
    margin-bottom: 30px;
}

.content-section h2 {
    margin-bottom: 15px;
    color: #2c3e50;
    padding-bottom: 10px;
    border-bottom: 2px solid #f1f2f6;
}

/* Hero Section */
.hero {
    background: linear-gradient(135deg, #2c3e50 0%, #3498db 100%);
    color: white;
    padding: 60px 0;
    text-align: center;
    margin-bottom: 40px;
    border-radius: 8px;
}

.hero-content h1 {
    font-size: 2.5rem;
    margin-bottom: 20px;
}

.hero-content p {
    font-size: 1.2rem;
    margin-bottom: 30px;
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
}

.hero-buttons {
    display: flex;
    gap: 15px;
    justify-content: center;
    flex-wrap: wrap;
}

/* Features Section */
.features {
    margin-bottom: 40px;
}

.features h2 {
    text-align: center;
    margin-bottom: 30px;
    color: #2c3e50;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 20px;
}

.feature-card {
    background: white;
    padding: 30px;
    border-radius: 8px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    text-align: center;
    transition: transform 0.3s;
}

.feature-card:hover {
    transform: translateY(-5px);
}

.feature-card i {
    font-size: 40px;
    color: #3498db;
    margin-bottom: 20px;
}

.feature-card h3 {
    margin-bottom: 15px;
    color: #2c3e50;
}

/* Courses Grid */
.courses-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 20px;
}

.course-card {
    background: white;
    padding: 20px;
    border-radius: 8px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    transition: transform 0.3s;
}

.course-card:hover {
    transform: translateY(-5px);
}

.course-card h3 {
    margin-bottom: 10px;
    color: #2c3e50;
}

.course-id {
    color: #7f8c8d;
    font-size: 14px;
    margin-bottom: 10px;
}

.teacher, .credits, .academic-year {
    margin-bottom: 8px;
    color: #555;
}

.description {
    margin-bottom: 15px;
    color: #666;
}

.course-actions {
    display: flex;
    gap: 10px;
    margin-top: 15px;
}

/* Status Badges */
.status-badge {
    display: inline-block;
    padding: 5px 10px;
    border-radius: 20px;
    font-size: 12px;
    font-weight: 600;
    margin-bottom: 10px;
}

.status-badge.current {
    background: #d4edda;
    color: #155724;
}

.status-badge.registered {
    background: #d1ecf1;
    color: #0c5460;
}

/* Announcements */
.announcements-list {
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.announcement-item {
    background: white;
    padding: 20px;
    border-radius: 8px;
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
}

.announcement-item h3 {
    margin-bottom: 10px;
    color: #2c3e50;
}

.announcement-meta {
    display: flex;
    gap: 15px;
    margin-top: 10px;
    font-size: 12px;
    color: #7f8c8d;
}

/* Upcoming List */
.upcoming-list {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.upcoming-item {
    background: #f8f9fa;
    padding: 15px;
    border-radius: 6px;
    border-left: 4px solid #3498db;
}

.upcoming-item h4 {
    margin-bottom: 5px;
    color: #2c3e50;
}

.due-date {
    font-size: 12px;
    color: #e74c3c;
    font-weight: 600;
}

/* Assessments */
.assessments-list {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.assessment-item {
    background: white;
    padding: 20px;
    border-radius: 8px;
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
}

.assessment-item h3 {
    margin-bottom: 10px;
    color: #2c3e50;
}

.grade-form {
    margin-top: 15px;
    padding: 15px;
    background: #f8f9fa;
    border-radius: 6px;
}

/* Export Section */
.export-section {
    background: white;
    padding: 20px;
    border-radius: 8px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    margin-top: 20px;
    text-align: center;
}

.export-section h3 {
    margin-bottom: 15px;
    color: #2c3e50;
}

/* Logs Container */
.logs-container {
    max-height: 400px;
    overflow-y: auto;
}

/* Responsive Design */
@media (max-width: 1024px) {
    .dashboard-content {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    .header-container {
        flex-direction: column;
        gap: 15px;
    }
    
    .main-nav ul {
        flex-wrap: wrap;
        justify-content: center;
    }
    
    .main-nav li {
        margin: 5px;
    }
    
    .stats-grid {
        grid-template-columns: 1fr;
    }
    
    .form-row {
        grid-template-columns: 1fr;
    }
    
    .courses-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 480px) {
    .hero-content h1 {
        font-size: 2rem;
    }
    
    .hero-content p {
        font-size: 1rem;
    }
    
    .hero-buttons {
        flex-direction: column;
        align-items: center;
    }
    
    .auth-form {
        padding: 20px;
    }
}