:root {
    --primary-color: #FF6B6B;
    --secondary-color: #4ECDC4;
    --accent-color: #FFE66D;
    --dark-color: #1A535C;
    --light-color: #F7FFF7;
    --danger-color: #ff4757;
    --success-color: #2ed573;
}

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

body {
    font-family: 'Poppins', sans-serif;
    background-color: #f8f9fa;
    color: #333;
    line-height: 1.6;
}

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

/* Header */
header {
    background: linear-gradient(135deg, var(--primary-color), var(--dark-color));
    color: white;
    padding: 30px 0;
    text-align: center;
}

header h1 {
    font-size: 3rem;
    margin-bottom: 10px;
    font-weight: 700;
    letter-spacing: 1px;
}

header h2 {
    font-size: 1.5rem;
    font-weight: 400;
    margin-bottom: 20px;
}

.search-bar {
    display: flex;
    max-width: 600px;
    margin: 20px auto 0;
}

.search-bar input {
    flex: 1;
    padding: 12px 20px;
    font-size: 1rem;
    border: none;
    border-radius: 30px 0 0 30px;
    outline: none;
}

.search-bar button {
    padding: 0 25px;
    background-color: var(--accent-color);
    color: var(--dark-color);
    border: none;
    border-radius: 0 30px 30px 0;
    cursor: pointer;
    font-size: 1rem;
    transition: background-color 0.3s;
}

.search-bar button:hover {
    background-color: #f0da63;
}

.whatsapp-cta {
    margin-top: 20px;
    text-align: center;
}

.whatsapp-link {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background-color: #25D366;
    color: white;
    padding: 12px 24px;
    border-radius: 30px;
    text-decoration: none;
    font-weight: 500;
    font-size: 1rem;
    transition: all 0.3s;
    box-shadow: 0 4px 12px rgba(37, 211, 102, 0.3);
}

.whatsapp-link:hover {
    background-color: #128C7E;
    transform: translateY(-2px);
    box-shadow: 0 6px 16px rgba(37, 211, 102, 0.4);
}

.whatsapp-link i {
    font-size: 1.3rem;
}

/* Highlight Section */
.highlight {
    padding: 10px 0;
    background-color: var(--accent-color);
}

.alert {
    text-align: center;
    font-weight: 600;
    color: var(--dark-color);
    padding: 10px;
    font-size: 1.1rem;
    animation: pulse 2s infinite;
}

.alert i {
    margin-right: 5px;
}

/* Courses Section */
.courses {
    padding: 50px 0;
}

.filters {
    display: flex;
    flex-direction: column;
    gap: 20px;
    margin-bottom: 30px;
}

.filter-category,
.filter-price {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    align-items: center;
    justify-content: center;
}

.filter-category strong,
.filter-price strong {
    color: #333;
    font-size: 1rem;
    margin-right: 10px;
}

.filter-btn {
    background-color: transparent;
    border: 2px solid var(--primary-color);
    color: var(--primary-color);
    padding: 8px 16px;
    margin: 5px;
    border-radius: 20px;
    cursor: pointer;
    font-weight: 500;
    transition: all 0.3s;
}

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

.sort-btn {
    padding: 10px 20px;
    border: 2px solid #4CAF50;
    background-color: white;
    color: #333;
    border-radius: 25px;
    cursor: pointer;
    font-size: 0.9rem;
    transition: all 0.3s;
    font-weight: 500;
}

.sort-btn:hover {
    background-color: #4CAF50;
    color: white;
    transform: translateY(-2px);
    box-shadow: 0 4px 8px rgba(76, 175, 80, 0.3);
}

.sort-btn i {
    margin-right: 5px;
}

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

.course-card {
    background-color: white;
    border-radius: 10px;
    overflow: hidden;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s, box-shadow 0.3s;
    position: relative;
}

.course-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 30px rgba(0, 0, 0, 0.15);
}

.course-image {
    height: 200px;
    background-size: cover;
    background-position: center;
    position: relative;
}

.discount-badge {
    position: absolute;
    top: 15px;
    right: 15px;
    background-color: var(--danger-color);
    color: white;
    font-weight: 700;
    padding: 5px 10px;
    border-radius: 20px;
    font-size: 1rem;
}

.course-content {
    padding: 20px;
}

.course-title {
    font-size: 1.2rem;
    font-weight: 600;
    margin-bottom: 10px;
    color: var(--dark-color);
    height: 60px;
    overflow: hidden;
}

.course-description {
    color: #666;
    font-size: 0.9rem;
    margin-bottom: 15px;
    height: 60px;
    overflow: hidden;
}

.countdown-container {
    background-color: #f8f9fa;
    padding: 10px;
    border-radius: 5px;
    text-align: center;
    margin-bottom: 15px;
}

.countdown-text {
    font-size: 0.85rem;
    color: #666;
    margin-bottom: 5px;
}

.countdown {
    font-weight: 700;
    color: var(--danger-color);
    font-size: 1.1rem;
}

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

.price-container {
    display: flex;
    flex-direction: column;
}

.original-price {
    text-decoration: line-through;
    color: #999;
    font-size: 0.9rem;
}

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

.course-btn {
    background-color: var(--secondary-color);
    color: white;
    border: none;
    padding: 10px 20px;
    border-radius: 5px;
    font-weight: 600;
    cursor: pointer;
    transition: background-color 0.3s;
}

.course-btn:hover {
    background-color: #3dbcb3;
}

/* Footer */
footer {
    background-color: var(--dark-color);
    color: white;
    padding: 50px 0 20px;
}

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

.footer-section h3 {
    font-size: 1.3rem;
    margin-bottom: 15px;
    position: relative;
    padding-bottom: 10px;
}

.footer-section h3::after {
    content: '';
    position: absolute;
    left: 0;
    bottom: 0;
    width: 50px;
    height: 2px;
    background-color: var(--primary-color);
}

.footer-section p {
    margin-bottom: 15px;
}

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

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

.footer-section ul li a {
    color: #ddd;
    text-decoration: none;
    transition: color 0.3s;
}

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

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

.social-icons a {
    display: inline-flex;
    justify-content: center;
    align-items: center;
    width: 40px;
    height: 40px;
    background-color: rgba(255, 255, 255, 0.1);
    color: white;
    border-radius: 50%;
    transition: background-color 0.3s, transform 0.3s;
}

.social-icons a:hover {
    background-color: var(--primary-color);
    transform: translateY(-3px);
}

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

/* Animations */
@keyframes pulse {
    0% { opacity: 1; }
    50% { opacity: 0.8; }
    100% { opacity: 1; }
}

/* Responsive */
@media screen and (max-width: 768px) {
    header h1 {
        font-size: 2.3rem;
    }
    
    header h2 {
        font-size: 1.2rem;
    }
    
    .course-grid {
        grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
    }
    
    .filter-btn {
        padding: 6px 12px;
        font-size: 0.9rem;
    }
}