/* Global Styles */
:root {
    --primary-color: #4a6bff;
    --secondary-color: #f8f9fa;
    --dark-color: #343a40;
    --light-color: #ffffff;
    --success-color: #28a745;
    --danger-color: #dc3545;
    --warning-color: #ffc107;
    --info-color: #17a2b8;
    --text-color: #333333;
    --text-light: #6c757d;
    --border-radius: 8px;
    --box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    --transition: all 0.3s ease;
}

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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    color: var(--text-color);
    background-color: var(--secondary-color);
}

.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

.btn {
    display: inline-block;
    padding: 10px 20px;
    border: none;
    border-radius: var(--border-radius);
    cursor: pointer;
    text-align: center;
    text-decoration: none;
    transition: var(--transition);
    font-weight: 500;
}

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

.btn-primary:hover {
    background-color: #3a5bef;
    transform: translateY(-2px);
}

.btn-secondary {
    background-color: var(--secondary-color);
    color: var(--text-color);
    border: 1px solid #ddd;
}

.btn-secondary:hover {
    background-color: #e9ecef;
}

/* Header Styles */
.header {
    background-color: var(--light-color);
    box-shadow: var(--box-shadow);
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 1000;
}

.header .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px 20px;
}

.logo {
    display: flex;
    align-items: center;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-color);
}

.logo i {
    margin-right: 10px;
    font-size: 1.8rem;
}

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

.nav ul li {
    margin-left: 25px;
    position: relative;
}

.nav ul li a {
    text-decoration: none;
    color: var(--text-color);
    font-weight: 500;
    transition: var(--transition);
}

.nav ul li a:hover {
    color: var(--primary-color);
}

.user-menu {
    position: relative;
}

.user-menu .dropdown {
    display: none;
    position: absolute;
    right: 0;
    top: 100%;
    background-color: var(--light-color);
    box-shadow: var(--box-shadow);
    border-radius: var(--border-radius);
    padding: 10px 0;
    min-width: 150px;
    z-index: 1;
}

.user-menu .dropdown a {
    display: block;
    padding: 8px 15px;
    color: var(--text-color);
    text-decoration: none;
    transition: var(--transition);
}

.user-menu .dropdown a:hover {
    background-color: var(--secondary-color);
    color: var(--primary-color);
}

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

.mobile-menu-btn {
    display: none;
    font-size: 1.5rem;
    cursor: pointer;
}

/* Hero Section */
.hero {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: var(--light-color);
    padding: 150px 0 100px;
    text-align: center;
}

.hero-content h1 {
    font-size: 2.8rem;
    margin-bottom: 20px;
}

.hero-content p {
    font-size: 1.2rem;
    margin-bottom: 30px;
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
}

/* Courses Section */
.courses-section {
    padding: 80px 0;
}

.courses-section h2 {
    text-align: center;
    margin-bottom: 40px;
    font-size: 2rem;
    color: var(--dark-color);
}

.filter-controls {
    display: flex;
    justify-content: space-between;
    margin-bottom: 30px;
    flex-wrap: wrap;
    gap: 15px;
}

.search-box {
    flex: 1;
    min-width: 250px;
    display: flex;
    border: 1px solid #ddd;
    border-radius: var(--border-radius);
    overflow: hidden;
}

.search-box input {
    flex: 1;
    padding: 10px 15px;
    border: none;
    outline: none;
}

.search-box button {
    padding: 0 15px;
    border: none;
    background-color: var(--primary-color);
    color: var(--light-color);
    cursor: pointer;
}

select {
    padding: 10px 15px;
    border: 1px solid #ddd;
    border-radius: var(--border-radius);
    outline: none;
    min-width: 180px;
}

.courses-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 25px;
}

.course-card {
    background-color: var(--light-color);
    border-radius: var(--border-radius);
    overflow: hidden;
    box-shadow: var(--box-shadow);
    transition: var(--transition);
}

.course-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.1);
}

.course-image {
    height: 180px;
    overflow: hidden;
}

.course-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--transition);
}

.course-card:hover .course-image img {
    transform: scale(1.05);
}

.course-content {
    padding: 20px;
}

.course-category {
    display: inline-block;
    padding: 5px 10px;
    background-color: var(--primary-color);
    color: var(--light-color);
    border-radius: var(--border-radius);
    font-size: 0.8rem;
    margin-bottom: 10px;
}

.course-title {
    font-size: 1.2rem;
    margin-bottom: 10px;
    color: var(--dark-color);
}

.course-instructor {
    display: flex;
    align-items: center;
    margin-bottom: 10px;
    color: var(--text-light);
    font-size: 0.9rem;
}

.course-instructor i {
    margin-right: 5px;
}

.course-meta {
    display: flex;
    justify-content: space-between;
    margin-bottom: 15px;
    font-size: 0.9rem;
}

.course-level {
    padding: 3px 8px;
    border-radius: 4px;
    font-weight: 500;
}

.level-beginner {
    background-color: rgba(40, 167, 69, 0.1);
    color: var(--success-color);
}

.level-intermediate {
    background-color: rgba(255, 193, 7, 0.1);
    color: var(--warning-color);
}

.level-advanced {
    background-color: rgba(220, 53, 69, 0.1);
    color: var(--danger-color);
}

.course-seats {
    color: var(--text-light);
}

.course-seats.low {
    color: var(--danger-color);
    font-weight: 500;
}

.course-description {
    margin-bottom: 15px;
    font-size: 0.9rem;
    color: var(--text-light);
    display: -webkit-box;
    /* -webkit-line-clamp: 3; */
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.course-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.course-price {
    font-weight: 700;
    font-size: 1.2rem;
    color: var(--primary-color);
}

/* Features Section */
.features-section {
    padding: 60px 0;
    background-color: var(--light-color);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
}

.feature-card {
    text-align: center;
    padding: 30px 20px;
    border-radius: var(--border-radius);
    background-color: var(--secondary-color);
    transition: var(--transition);
}

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

.feature-card i {
    font-size: 2.5rem;
    color: var(--primary-color);
    margin-bottom: 20px;
}

.feature-card h3 {
    margin-bottom: 15px;
    color: var(--dark-color);
}

/* Footer Styles */
.footer {
    background-color: var(--dark-color);
    color: var(--light-color);
    padding: 60px 0 0;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 40px;
    margin-bottom: 40px;
}

.footer-section h3 {
    margin-bottom: 20px;
    font-size: 1.2rem;
}

.footer-section p {
    margin-bottom: 10px;
    color: rgba(255, 255, 255, 0.7);
}

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

.footer-section ul li {
    margin-bottom: 10px;
}

.footer-section ul li a {
    color: rgba(255, 255, 255, 0.7);
    text-decoration: none;
    transition: var(--transition);
}

.footer-section ul li a:hover {
    color: var(--light-color);
}

.footer-section i {
    margin-right: 10px;
    width: 20px;
    text-align: center;
}

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding: 20px 0;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.social-icons {
    display: flex;
    gap: 15px;
}

.social-icons a {
    color: var(--light-color);
    font-size: 1.2rem;
    transition: var(--transition);
}

.social-icons a:hover {
    color: var(--primary-color);
}

/* Modal Styles */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    z-index: 2000;
    overflow-y: auto;
}

.modal-content {
    background-color: var(--light-color);
    margin: 50px auto;
    width: 90%;
    max-width: 700px;
    border-radius: var(--border-radius);
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.3);
    animation: modalopen 0.5s;
}

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

.close-modal {
    position: absolute;
    top: 15px;
    right: 15px;
    font-size: 1.5rem;
    color: var(--text-light);
    cursor: pointer;
    transition: var(--transition);
}

.close-modal:hover {
    color: var(--text-color);
}

.modal-body {
    padding: 30px;
}

.modal h2 {
    margin-bottom: 20px;
    padding: 20px 30px 0;
    color: var(--dark-color);
}

.course-info {
    margin-bottom: 30px;
}

.course-info p {
    margin-bottom: 10px;
}

.course-description {
    margin-top: 20px;
    line-height: 1.8;
}

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

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 500;
}

.form-group input,
.form-group select {
    width: 100%;
    padding: 10px 15px;
    border: 1px solid #ddd;
    border-radius: var(--border-radius);
    outline: none;
    transition: var(--transition);
}

.form-group input:focus,
.form-group select:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(74, 107, 255, 0.2);
}

/* Confirmation Modal */
.modal-content.confirmation {
    text-align: center;
    padding: 40px;
    max-width: 500px;
}

.modal-content.confirmation i {
    font-size: 4rem;
    color: var(--success-color);
    margin-bottom: 20px;
}

.modal-content.confirmation h2 {
    margin-bottom: 15px;
}

.modal-content.confirmation p {
    margin-bottom: 30px;
    font-size: 1.1rem;
}

/* Responsive Styles */
@media (max-width: 992px) {
    .nav ul {
        display: none;
    }
    
    .mobile-menu-btn {
        display: block;
    }
    
    .hero-content h1 {
        font-size: 2.2rem;
    }
    
    .filter-controls {
        flex-direction: column;
    }
    
    .search-box, select {
        width: 100%;
    }
}

@media (max-width: 768px) {
    .hero {
        padding: 120px 0 80px;
    }
    
    .hero-content h1 {
        font-size: 1.8rem;
    }
    
    .hero-content p {
        font-size: 1rem;
    }
    
    .courses-grid {
        grid-template-columns: 1fr;
    }
    
    .features-grid {
        grid-template-columns: 1fr;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
    }
    
    .footer-bottom {
        flex-direction: column;
        gap: 15px;
    }
}