* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Poppins', sans-serif;
}

:root {
    --primary: #3498db;
    --primary-dark: #2980b9;
    --dark: #2c3e50;
    --accent: #e74c3c;
    --light: #f9f9f9;
}

body {
    background-color: #f5f7fa;
    color: var(--dark);
    line-height: 1.6;
}

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

section {
    padding: 60px 0;
}

.section-title {
    text-align: center;
    margin-bottom: 40px;
    font-size: 2.5rem;
    color: var(--dark);
    position: relative;
}

.section-title::after {
    content: '';
    position: absolute;
    width: 80px;
    height: 3px;
    background: var(--primary);
    bottom: -15px;
    left: 50%;
    transform: translateX(-50%);
}

/* Hero Section */
.courses-hero {
    background: linear-gradient(
            135deg,
            rgba(44, 62, 80, 0.9),
            rgba(52, 152, 219, 0.9)
        ),
        url('https://images.unsplash.com/photo-1555066931-4365d14bab8c?ixlib=rb-1.2.1&auto=format&fit=crop&w=1350&q=80');
    background-size: cover;
    background-position: center;
    color: white;
    text-align: center;
    padding: 120px 0 80px;
    clip-path: polygon(0 0, 100% 0, 100% 90%, 0 100%);
}

.courses-hero h1 {
    font-size: 3rem;
    margin-bottom: 20px;
}

.courses-hero p {
    font-size: 1.2rem;
    max-width: 700px;
    margin: 0 auto;
    opacity: 0.9;
}

/* Filter Bar */
.filter-bar {
    background: white;
    border-radius: 8px;
    padding: 20px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
    margin: -40px auto 40px;
    position: relative;
    z-index: 2;
    max-width: 1000px;
}

.filter-group {
    display: flex;
    flex-wrap: wrap;
    gap: 15px;
    justify-content: center;
}

.filter-btn {
    padding: 10px 20px;
    background: #f1f9fe;
    border: none;
    border-radius: 30px;
    color: var(--dark);
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s;
}

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

.search-box {
    position: relative;
    width: 100%;
    max-width: 400px;
    margin: 15px auto 0;
}

.search-box input {
    width: 100%;
    padding: 12px 20px 12px 45px;
    border: 1px solid #ddd;
    border-radius: 30px;
    font-size: 1rem;
}

.search-box i {
    position: absolute;
    left: 15px;
    top: 50%;
    transform: translateY(-50%);
    color: #7f8c8d;
}

/* Courses Grid */
.courses-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
    gap: 30px;
    margin-top: 40px;
}

.course-card {
    background: white;
    border-radius: 10px;
    overflow: hidden;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
    transition: all 0.3s;
}

.course-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 30px rgba(0, 0, 0, 0.1);
}

.course-img {
    width: 100%;
    height: 200px;
    object-fit: cover;
}

.course-badge {
    position: absolute;
    top: 15px;
    right: 15px;
    background: var(--accent);
    color: white;
    padding: 5px 15px;
    border-radius: 30px;
    font-size: 0.8rem;
    font-weight: 600;
}

.course-content {
    padding: 25px;
    position: relative;
}

.course-content h3 {
    font-size: 1.4rem;
    margin-bottom: 10px;
    color: var(--dark);
}

.course-meta {
    display: flex;
    gap: 15px;
    margin-bottom: 15px;
    flex-wrap: wrap;
}

.meta-item {
    display: flex;
    align-items: center;
    gap: 5px;
    color: #7f8c8d;
    font-size: 0.9rem;
}

.meta-item i {
    color: var(--primary);
}

.course-desc {
    color: #666;
    margin-bottom: 20px;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.course-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-top: 20px;
    padding-top: 20px;
    border-top: 1px solid #eee;
}

.course-price {
    font-size: 1.3rem;
    font-weight: 700;
    color: var(--dark);
}

.course-price span {
    font-size: 0.9rem;
    color: #7f8c8d;
    font-weight: normal;
    text-decoration: line-through;
    margin-left: 5px;
}

.enroll-btn {
    padding: 8px 20px;
    background: var(--primary);
    color: white;
    border: none;
    border-radius: 6px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s;
}

.enroll-btn:hover {
    background: var(--primary-dark);
}

/* Categories Section */
.categories {
    background: white;
    padding: 60px 0;
}

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

.category-card {
    background: #f1f9fe;
    border-radius: 10px;
    padding: 30px;
    text-align: center;
    transition: all 0.3s;
}

.category-card:hover {
    background: var(--primary);
    color: white;
    transform: translateY(-5px);
}

.category-card i {
    font-size: 2.5rem;
    margin-bottom: 15px;
    color: var(--primary);
}

.category-card:hover i {
    color: white;
}

.category-card h3 {
    margin-bottom: 10px;
}

/* Responsive */
@media (max-width: 992px) {
    .courses-grid {
        grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    }
}

@media (max-width: 768px) {
    .courses-hero h1 {
        font-size: 2.5rem;
    }

    .section-title {
        font-size: 2rem;
    }

    .filter-btn {
        padding: 8px 15px;
        font-size: 0.9rem;
    }
}

@media (max-width: 576px) {
    .courses-hero {
        padding: 80px 0 60px;
    }

    .courses-hero h1 {
        font-size: 2rem;
    }

    .courses-grid {
        grid-template-columns: 1fr;
    }

    .filter-group {
        flex-direction: column;
        align-items: center;
    }
}

/* Animations */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.fade-in {
    opacity: 0;
    animation: fadeIn 0.5s ease forwards;
}
#pagination {
    text-align: center;
    margin-top: 30px;
}

.pg-btn {
    background-color: #f0f0f0;
    border: 1px solid #ccc;
    color: #333;
    padding: 10px 15px;
    margin: 5px;
    border-radius: 6px;
    cursor: pointer;
    font-weight: 500;
    transition: all 0.3s ease;
}

.pg-btn:hover {
    background-color: #007bff;
    color: white;
    border-color: #007bff;
}

.pg-btn.active {
    background-color: #007bff;
    color: white;
    font-weight: bold;
    border-color: #0056b3;
}