/* ===== CSS Variables ===== */
:root {
    --primary-color: #1a56db;
    --primary-dark: #1e429f;
    --primary-light: #3b82f6;
    --secondary-color: #0ea5e9;
    --accent-color: #06b6d4;
    --text-dark: #1f2937;
    --text-light: #6b7280;
    --text-white: #ffffff;
    --bg-light: #f8fafc;
    --bg-white: #ffffff;
    --bg-dark: #111827;
    --border-color: #e5e7eb;
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1);
    --transition: all 0.3s ease;
}

/* ===== Reset & Base ===== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

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

a {
    text-decoration: none;
    color: inherit;
    transition: var(--transition);
}

ul {
    list-style: none;
}

img {
    max-width: 100%;
    height: auto;
}

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

/* ===== Typography ===== */
h1, h2, h3, h4, h5, h6 {
    font-weight: 700;
    line-height: 1.3;
    color: var(--text-dark);
}

h1 { font-size: 2.5rem; }
h2 { font-size: 2rem; }
h3 { font-size: 1.5rem; }
h4 { font-size: 1.25rem; }

p {
    color: var(--text-light);
    margin-bottom: 1rem;
}

/* ===== Buttons ===== */
.btn {
    display: inline-block;
    padding: 12px 28px;
    border-radius: 8px;
    font-weight: 600;
    font-size: 1rem;
    cursor: pointer;
    transition: var(--transition);
    border: none;
    text-align: center;
}

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

.btn-primary:hover {
    background-color: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.btn-secondary {
    background-color: transparent;
    color: var(--primary-color);
    border: 2px solid var(--primary-color);
}

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

/* ===== Header & Navigation ===== */
header {
    background-color: var(--bg-white);
    box-shadow: var(--shadow-sm);
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 1000;
}

.nav-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px 20px;
    max-width: 1200px;
    margin: 0 auto;
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
}

.logo-icon {
    width: 45px;
    height: 45px;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-weight: bold;
    font-size: 1.2rem;
}

.logo-text {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-color);
}

.logo-text span {
    color: var(--secondary-color);
}

.nav-menu {
    display: flex;
    gap: 35px;
}

.nav-menu a {
    color: var(--text-dark);
    font-weight: 500;
    padding: 8px 0;
    position: relative;
}

.nav-menu a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background-color: var(--primary-color);
    transition: var(--transition);
}

.nav-menu a:hover::after,
.nav-menu a.active::after {
    width: 100%;
}

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

.mobile-menu-btn {
    display: none;
    flex-direction: column;
    gap: 5px;
    cursor: pointer;
    padding: 5px;
}

.mobile-menu-btn span {
    width: 25px;
    height: 3px;
    background-color: var(--text-dark);
    border-radius: 2px;
    transition: var(--transition);
}

/* ===== Hero Section ===== */
.hero {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    padding: 140px 0 80px;
    color: var(--text-white);
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.05'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
}

.hero-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
    position: relative;
    z-index: 1;
}

.hero-text h1 {
    color: var(--text-white);
    font-size: 3rem;
    margin-bottom: 20px;
}

.hero-text p {
    color: rgba(255, 255, 255, 0.9);
    font-size: 1.2rem;
    margin-bottom: 30px;
}

.hero-buttons {
    display: flex;
    gap: 15px;
}

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

.btn-white:hover {
    background-color: var(--bg-light);
    transform: translateY(-2px);
}

.btn-outline-white {
    background-color: transparent;
    color: var(--text-white);
    border: 2px solid var(--text-white);
}

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

.hero-image {
    display: flex;
    justify-content: center;
}

.hero-image img {
    max-width: 100%;
    border-radius: 20px;
    box-shadow: var(--shadow-lg);
}

.hero-placeholder {
    width: 100%;
    max-width: 500px;
    height: 350px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    backdrop-filter: blur(10px);
}

/* ===== Stats Section ===== */
.stats {
    background-color: var(--bg-white);
    padding: 40px 0;
    margin-top: -40px;
    position: relative;
    z-index: 2;
    border-radius: 20px;
    max-width: 1000px;
    margin-left: auto;
    margin-right: auto;
    box-shadow: var(--shadow-lg);
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 30px;
    text-align: center;
}

.stat-item h3 {
    font-size: 2.5rem;
    color: var(--primary-color);
    margin-bottom: 5px;
}

.stat-item p {
    color: var(--text-light);
    margin: 0;
}

/* ===== Popular Courses Section ===== */
.popular-courses {
    padding: 100px 0;
    background-color: var(--bg-light);
}

.popular-courses-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
    margin-bottom: 50px;
}

.popular-course-card {
    background-color: var(--bg-white);
    border-radius: 20px;
    overflow: hidden;
    box-shadow: var(--shadow-md);
    transition: var(--transition);
    position: relative;
}

.popular-course-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 25px 50px -12px rgb(0 0 0 / 0.15);
}

/* Course Badge */
.course-badge {
    position: absolute;
    top: 15px;
    left: 15px;
    padding: 8px 16px;
    border-radius: 25px;
    font-size: 0.8rem;
    font-weight: 700;
    z-index: 2;
    background-color: #ef4444;
    color: white;
    box-shadow: 0 4px 15px rgba(239, 68, 68, 0.4);
}

.course-badge.new {
    background-color: #10b981;
    box-shadow: 0 4px 15px rgba(16, 185, 129, 0.4);
}

/* Course Thumbnail */
.course-thumbnail {
    height: 180px;
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
}

.course-thumbnail::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.1'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
}

.course-icon {
    width: 90px;
    height: 90px;
    background: rgba(255, 255, 255, 0.2);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    backdrop-filter: blur(10px);
    border: 2px solid rgba(255, 255, 255, 0.3);
}

.course-icon svg {
    width: 45px;
    height: 45px;
    color: white;
}

/* Course Info */
.course-info {
    padding: 25px;
}

.course-tag {
    display: inline-block;
    padding: 6px 14px;
    background: linear-gradient(135deg, rgba(26, 86, 219, 0.1), rgba(14, 165, 233, 0.1));
    color: var(--primary-color);
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 600;
    margin-bottom: 15px;
}

.course-info h3 {
    font-size: 1.2rem;
    margin-bottom: 12px;
    line-height: 1.4;
    color: var(--text-dark);
}

.course-info > p {
    font-size: 0.9rem;
    color: var(--text-light);
    margin-bottom: 20px;
    line-height: 1.7;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

/* Course Details */
.course-details {
    padding-top: 15px;
    border-top: 1px solid var(--border-color);
}

.course-meta-info {
    display: flex;
    gap: 20px;
    margin-bottom: 12px;
}

.course-meta-info .meta-item {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 0.85rem;
    color: var(--text-light);
}

.course-meta-info .meta-item svg {
    color: var(--primary-color);
}

/* Course Rating */
.course-rating {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 20px;
}

.course-rating .stars {
    display: flex;
    gap: 2px;
}

.course-rating .star {
    color: #d1d5db;
    font-size: 1rem;
}

.course-rating .star.filled {
    color: #fbbf24;
}

.course-rating .rating-text {
    font-weight: 700;
    color: var(--text-dark);
    font-size: 0.95rem;
}

/* Course Footer */
.course-footer {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 15px;
    padding-top: 20px;
    border-top: 1px solid var(--border-color);
}

.course-footer .course-price {
    display: flex;
    align-items: center;
    gap: 12px;
}

.course-footer .original-price {
    font-size: 0.95rem;
    color: var(--text-light);
    text-decoration: line-through;
}

.course-footer .sale-price {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-color);
}

.btn-enroll {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 12px 35px;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
    border: none;
    border-radius: 12px;
    font-weight: 600;
    font-size: 0.95rem;
    cursor: pointer;
    transition: var(--transition);
    box-shadow: 0 4px 15px rgba(26, 86, 219, 0.3);
}

.btn-enroll:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 25px rgba(26, 86, 219, 0.4);
}

/* View All Courses Button */
.popular-courses .section-cta {
    text-align: center;
}

/* Popular Courses Responsive */
@media (max-width: 1024px) {
    .popular-courses-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .popular-courses-grid {
        grid-template-columns: 1fr;
        max-width: 450px;
        margin-left: auto;
        margin-right: auto;
    }

    .course-thumbnail {
        height: 160px;
    }
}

@media (max-width: 480px) {
    .course-info {
        padding: 20px;
    }

    .course-meta-info {
        flex-wrap: wrap;
        gap: 12px;
    }

    .btn-enroll {
        width: 100%;
    }
}

/* ===== Features Section ===== */
.features {
    padding: 100px 0;
    background-color: var(--bg-light);
}

.section-header {
    text-align: center;
    margin-bottom: 60px;
}

.section-header h2 {
    margin-bottom: 15px;
}

.section-header p {
    max-width: 600px;
    margin: 0 auto;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

.feature-card {
    background-color: var(--bg-white);
    padding: 40px 30px;
    border-radius: 15px;
    text-align: center;
    transition: var(--transition);
    box-shadow: var(--shadow-sm);
}

.feature-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-lg);
}

.feature-icon {
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    border-radius: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 25px;
    font-size: 2rem;
    color: white;
}

.feature-card h3 {
    margin-bottom: 15px;
}

/* ===== Courses/Articles Section ===== */
.courses {
    padding: 100px 0;
    background-color: var(--bg-white);
}

.courses-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

.course-card {
    background-color: var(--bg-white);
    border-radius: 15px;
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
    border: 1px solid var(--border-color);
}

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

.course-image {
    height: 200px;
    background: linear-gradient(135deg, var(--primary-light), var(--secondary-color));
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 3rem;
}

.course-content {
    padding: 25px;
}

.course-category {
    display: inline-block;
    padding: 5px 12px;
    background-color: var(--bg-light);
    color: var(--primary-color);
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: 600;
    margin-bottom: 15px;
}

.course-content h3 {
    margin-bottom: 10px;
}

.course-meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-top: 20px;
    padding-top: 15px;
    border-top: 1px solid var(--border-color);
    color: var(--text-light);
    font-size: 0.9rem;
}

/* ===== Articles List ===== */
.articles-section {
    padding: 100px 0;
}

.articles-list {
    display: flex;
    flex-direction: column;
    gap: 30px;
}

.article-card {
    display: grid;
    grid-template-columns: 300px 1fr;
    gap: 30px;
    background-color: var(--bg-white);
    border-radius: 15px;
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
}

.article-card:hover {
    box-shadow: var(--shadow-lg);
}

.article-image {
    height: 100%;
    min-height: 200px;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 3rem;
}

.article-content {
    padding: 30px;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.article-content h3 {
    margin-bottom: 15px;
    transition: var(--transition);
}

.article-card:hover .article-content h3 {
    color: var(--primary-color);
}

.article-content p {
    margin-bottom: 20px;
}

.article-meta {
    display: flex;
    gap: 20px;
    color: var(--text-light);
    font-size: 0.9rem;
}

/* ===== About Section ===== */
.about-hero {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    padding: 140px 0 80px;
    color: white;
    text-align: center;
}

.about-hero h1 {
    color: white;
    margin-bottom: 20px;
}

.about-hero p {
    color: rgba(255, 255, 255, 0.9);
    max-width: 600px;
    margin: 0 auto;
}

.about-content {
    padding: 100px 0;
}

.about-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.about-text h2 {
    margin-bottom: 20px;
}

.about-image {
    background: linear-gradient(135deg, var(--primary-light), var(--secondary-color));
    height: 400px;
    border-radius: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 4rem;
}

.team-section {
    padding: 100px 0;
    background-color: var(--bg-white);
}

.team-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 30px;
}

.team-card {
    text-align: center;
    padding: 30px;
    background-color: var(--bg-light);
    border-radius: 15px;
    transition: var(--transition);
}

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

.team-avatar {
    width: 120px;
    height: 120px;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    border-radius: 50%;
    margin: 0 auto 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 2.5rem;
}

.team-card h4 {
    margin-bottom: 5px;
}

.team-card p {
    color: var(--primary-color);
    font-weight: 500;
    margin: 0;
}

/* ===== Courses Page ===== */
.courses-hero {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    padding: 140px 0 80px;
    color: white;
    text-align: center;
}

.courses-hero h1 {
    color: white;
    margin-bottom: 20px;
}

.courses-hero p {
    color: rgba(255, 255, 255, 0.9);
    max-width: 600px;
    margin: 0 auto;
}

/* Course Stats */
.course-stats {
    background-color: var(--bg-white);
    padding: 60px 0;
    margin-top: -40px;
    position: relative;
    z-index: 2;
}

.course-stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 30px;
    max-width: 1000px;
    margin: 0 auto;
    background-color: var(--bg-white);
    padding: 40px;
    border-radius: 20px;
    box-shadow: var(--shadow-lg);
}

.course-stat-item {
    display: flex;
    align-items: center;
    gap: 15px;
}

.course-stat-item .stat-icon {
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    border-radius: 15px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    flex-shrink: 0;
}

.course-stat-item .stat-content h3 {
    font-size: 1.8rem;
    color: var(--text-dark);
    margin-bottom: 2px;
}

.course-stat-item .stat-content p {
    color: var(--text-light);
    margin: 0;
    font-size: 0.9rem;
}

/* Course Categories Filter */
.course-categories {
    padding: 40px 0 20px;
    background-color: var(--bg-light);
}

.category-filter {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 12px;
}

.category-btn {
    padding: 12px 24px;
    border: 2px solid var(--border-color);
    background-color: var(--bg-white);
    border-radius: 30px;
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--text-dark);
    cursor: pointer;
    transition: var(--transition);
}

.category-btn:hover {
    border-color: var(--primary-color);
    color: var(--primary-color);
}

.category-btn.active {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
    border-color: transparent;
}

/* All Courses Section */
.all-courses {
    padding: 60px 0 100px;
    background-color: var(--bg-light);
}

.courses-listing {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

/* Courses Page Responsive */
@media (max-width: 1024px) {
    .course-stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .courses-listing {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .course-stats-grid {
        grid-template-columns: 1fr 1fr;
        padding: 30px 20px;
        gap: 20px;
    }

    .course-stat-item {
        flex-direction: column;
        text-align: center;
    }

    .category-filter {
        gap: 8px;
    }

    .category-btn {
        padding: 10px 18px;
        font-size: 0.85rem;
    }

    .courses-listing {
        grid-template-columns: 1fr;
        max-width: 450px;
        margin-left: auto;
        margin-right: auto;
    }
}

@media (max-width: 480px) {
    .course-stats-grid {
        grid-template-columns: 1fr 1fr;
    }

    .course-stat-item .stat-icon {
        width: 50px;
        height: 50px;
    }

    .course-stat-item .stat-icon svg {
        width: 24px;
        height: 24px;
    }

    .course-stat-item .stat-content h3 {
        font-size: 1.5rem;
    }
}

/* ===== Contact Section ===== */
.contact-hero {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    padding: 140px 0 80px;
    color: white;
    text-align: center;
}

.contact-hero h1 {
    color: white;
    margin-bottom: 20px;
}

.contact-hero p {
    color: rgba(255, 255, 255, 0.9);
    max-width: 600px;
    margin: 0 auto;
}

.contact-section {
    padding: 100px 0;
}

.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
}

.contact-info h2 {
    margin-bottom: 30px;
}

.contact-item {
    display: flex;
    gap: 20px;
    margin-bottom: 30px;
}

.contact-icon {
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    border-radius: 15px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 1.5rem;
    flex-shrink: 0;
}

.contact-item h4 {
    margin-bottom: 5px;
}

.contact-item p {
    margin: 0;
}

.contact-form {
    background-color: var(--bg-white);
    padding: 40px;
    border-radius: 20px;
    box-shadow: var(--shadow-md);
}

.contact-form h2 {
    margin-bottom: 30px;
}

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

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

.form-group input,
.form-group textarea,
.form-group select {
    width: 100%;
    padding: 15px;
    border: 2px solid var(--border-color);
    border-radius: 10px;
    font-size: 1rem;
    transition: var(--transition);
    font-family: inherit;
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
    outline: none;
    border-color: var(--primary-color);
}

.form-group textarea {
    min-height: 150px;
    resize: vertical;
}

.contact-form .btn {
    width: 100%;
}

/* ===== FAQ Accordion ===== */
.faq-section {
    padding: 80px 0;
    background-color: var(--bg-white);
}

.faq-container {
    max-width: 800px;
    margin: 0 auto;
}

.accordion {
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.accordion-item {
    background-color: var(--bg-light);
    border-radius: 15px;
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
}

.accordion-item:hover {
    box-shadow: var(--shadow-md);
}

.accordion-item.active {
    box-shadow: var(--shadow-md);
}

.accordion-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 25px;
    cursor: pointer;
    background-color: var(--bg-light);
    transition: var(--transition);
}

.accordion-header:hover {
    background-color: #f1f5f9;
}

.accordion-item.active .accordion-header {
    background-color: var(--primary-color);
    color: white;
}

.accordion-header h4 {
    margin: 0;
    font-size: 1.1rem;
    font-weight: 600;
    flex: 1;
    padding-right: 15px;
}

.accordion-icon {
    width: 30px;
    height: 30px;
    border-radius: 50%;
    background-color: var(--bg-white);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
    flex-shrink: 0;
}

.accordion-item.active .accordion-icon {
    background-color: rgba(255, 255, 255, 0.2);
    transform: rotate(180deg);
}

.accordion-icon svg {
    width: 20px;
    height: 20px;
    color: var(--primary-color);
    transition: var(--transition);
}

.accordion-item.active .accordion-icon svg {
    color: white;
}

.accordion-content {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease, padding 0.3s ease;
}

.accordion-item.active .accordion-content {
    max-height: 500px;
}

.accordion-body {
    padding: 0 25px 25px;
}

.accordion-body p {
    margin: 0;
    padding-top: 15px;
    color: var(--text-light);
    line-height: 1.8;
}

.accordion-body ul {
    padding-top: 15px;
    padding-left: 20px;
    list-style: disc;
}

.accordion-body li {
    color: var(--text-light);
    margin-bottom: 8px;
    line-height: 1.6;
}

@media (max-width: 768px) {
    .accordion-header {
        padding: 15px 20px;
    }

    .accordion-header h4 {
        font-size: 1rem;
    }

    .accordion-body {
        padding: 0 20px 20px;
    }
}

/* ===== Reviews Page ===== */
.reviews-hero {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    padding: 140px 0 80px;
    color: white;
    text-align: center;
}

.reviews-hero h1 {
    color: white;
    margin-bottom: 20px;
}

.reviews-hero p {
    color: rgba(255, 255, 255, 0.9);
    max-width: 600px;
    margin: 0 auto;
}

/* Review Stats */
.review-stats {
    background-color: var(--bg-white);
    padding: 60px 0;
    margin-top: -40px;
    position: relative;
    z-index: 2;
}

.review-stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 30px;
    max-width: 900px;
    margin: 0 auto;
    background-color: var(--bg-white);
    padding: 40px;
    border-radius: 20px;
    box-shadow: var(--shadow-lg);
}

.review-stat-item {
    text-align: center;
}

.review-stat-number {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: 5px;
}

.review-stat-stars {
    margin-bottom: 5px;
}

.star {
    color: #d1d5db;
    font-size: 1.2rem;
}

.star.filled {
    color: #fbbf24;
}

.review-stat-item p {
    color: var(--text-light);
    margin: 0;
}

/* Featured Reviews */
.featured-reviews {
    padding: 80px 0;
    background-color: var(--bg-light);
}

.featured-reviews-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

.featured-review-card {
    background-color: var(--bg-white);
    padding: 40px 30px;
    border-radius: 20px;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
    position: relative;
}

.featured-review-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-lg);
}

.featured-review-quote {
    position: absolute;
    top: 20px;
    right: 20px;
    color: var(--primary-light);
    opacity: 0.3;
}

.featured-review-text {
    font-size: 1.1rem;
    line-height: 1.8;
    color: var(--text-dark);
    margin-bottom: 25px;
    font-style: italic;
}

.featured-review-author {
    display: flex;
    align-items: center;
    gap: 15px;
    margin-bottom: 15px;
}

.author-avatar {
    width: 50px;
    height: 50px;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
}

.author-info h4 {
    margin-bottom: 3px;
    font-size: 1rem;
}

.author-info p {
    margin: 0;
    font-size: 0.85rem;
    color: var(--text-light);
}

.review-stars {
    display: flex;
    gap: 3px;
}

/* All Reviews */
.all-reviews {
    padding: 80px 0;
    background-color: var(--bg-white);
}

.reviews-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 25px;
}

.review-card {
    background-color: var(--bg-light);
    padding: 25px;
    border-radius: 15px;
    transition: var(--transition);
}

.review-card:hover {
    box-shadow: var(--shadow-md);
}

.review-header {
    display: flex;
    align-items: flex-start;
    gap: 12px;
    margin-bottom: 15px;
    flex-wrap: wrap;
}

.reviewer-avatar {
    width: 45px;
    height: 45px;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    flex-shrink: 0;
}

.reviewer-info {
    flex: 1;
    min-width: 150px;
}

.reviewer-info h4 {
    margin-bottom: 3px;
    font-size: 0.95rem;
}

.review-course {
    font-size: 0.8rem;
    color: var(--primary-color);
    font-weight: 500;
}

.review-rating {
    display: flex;
    gap: 2px;
}

.review-rating .star {
    font-size: 0.9rem;
}

.review-text {
    color: var(--text-light);
    font-size: 0.95rem;
    line-height: 1.7;
    margin-bottom: 15px;
}

.review-date {
    font-size: 0.8rem;
    color: #9ca3af;
}

/* Reviews Responsive */
@media (max-width: 1024px) {
    .review-stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .featured-reviews-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .reviews-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .review-stats-grid {
        grid-template-columns: repeat(2, 1fr);
        padding: 30px 20px;
    }

    .featured-reviews-grid {
        grid-template-columns: 1fr;
    }

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

    .review-stat-number {
        font-size: 2rem;
    }
}

@media (max-width: 480px) {
    .review-stats-grid {
        grid-template-columns: 1fr 1fr;
        gap: 20px;
    }

    .review-stat-number {
        font-size: 1.8rem;
    }
}

/* ===== Testimonial Carousel ===== */
.testimonial-carousel-section {
    padding: 100px 0;
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    position: relative;
    overflow: hidden;
}

.testimonial-carousel-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.05'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
}

.testimonial-carousel-section .section-header h2 {
    color: white;
}

.testimonial-carousel-section .section-header p {
    color: rgba(255, 255, 255, 0.9);
}

.carousel-wrapper {
    position: relative;
    max-width: 900px;
    margin: 0 auto;
    padding: 0 60px;
}

.carousel-container {
    overflow: hidden;
    border-radius: 20px;
}

.carousel-track {
    display: flex;
    transition: transform 0.5s ease-in-out;
}

.carousel-slide {
    min-width: 100%;
    padding: 0 10px;
    box-sizing: border-box;
}

.testimonial-card {
    background-color: var(--bg-white);
    padding: 40px;
    border-radius: 20px;
    box-shadow: var(--shadow-lg);
    text-align: center;
}

.testimonial-rating {
    margin-bottom: 20px;
}

.testimonial-rating .star {
    font-size: 1.5rem;
}

.testimonial-text {
    font-size: 1.2rem;
    line-height: 1.8;
    color: var(--text-dark);
    font-style: italic;
    margin-bottom: 30px;
    position: relative;
}

.testimonial-text::before {
    content: '"';
    font-size: 4rem;
    color: var(--primary-light);
    opacity: 0.3;
    position: absolute;
    top: -20px;
    left: -10px;
    font-family: Georgia, serif;
}

.testimonial-author {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 15px;
}

.testimonial-author .author-avatar {
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
}

.author-details {
    text-align: left;
}

.author-details h4 {
    margin-bottom: 5px;
    color: var(--text-dark);
}

.author-details p {
    margin: 0;
    color: var(--text-light);
    font-size: 0.9rem;
}

/* Carousel Navigation Buttons */
.carousel-btn {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    width: 50px;
    height: 50px;
    background-color: var(--bg-white);
    border: none;
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: var(--shadow-md);
    transition: var(--transition);
    z-index: 10;
    color: var(--primary-color);
}

.carousel-btn:hover {
    background-color: var(--primary-color);
    color: white;
    transform: translateY(-50%) scale(1.1);
}

.carousel-prev {
    left: 0;
}

.carousel-next {
    right: 0;
}

/* Carousel Dots */
.carousel-dots {
    display: flex;
    justify-content: center;
    gap: 10px;
    margin-top: 30px;
}

.carousel-dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    border: none;
    background-color: rgba(255, 255, 255, 0.4);
    cursor: pointer;
    transition: var(--transition);
}

.carousel-dot:hover {
    background-color: rgba(255, 255, 255, 0.7);
}

.carousel-dot.active {
    background-color: white;
    transform: scale(1.2);
}

/* Carousel Responsive */
@media (max-width: 768px) {
    .carousel-wrapper {
        padding: 0 50px;
    }

    .carousel-btn {
        width: 40px;
        height: 40px;
    }

    .testimonial-card {
        padding: 30px 20px;
    }

    .testimonial-text {
        font-size: 1rem;
    }

    .testimonial-text::before {
        font-size: 3rem;
        top: -15px;
        left: -5px;
    }

    .testimonial-author {
        flex-direction: column;
        text-align: center;
    }

    .author-details {
        text-align: center;
    }
}

@media (max-width: 480px) {
    .carousel-wrapper {
        padding: 0 40px;
    }

    .carousel-btn {
        width: 35px;
        height: 35px;
    }

    .carousel-btn svg {
        width: 18px;
        height: 18px;
    }

    .testimonial-card {
        padding: 25px 15px;
    }

    .testimonial-rating .star {
        font-size: 1.2rem;
    }

    .testimonial-author .author-avatar {
        width: 50px;
        height: 50px;
    }
}

/* ===== Footer ===== */
footer {
    background-color: var(--bg-dark);
    color: var(--text-white);
    padding: 80px 0 30px;
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 40px;
    margin-bottom: 50px;
}

.footer-brand .logo-text {
    color: white;
    margin-bottom: 20px;
    display: inline-block;
}

.footer-brand p {
    color: rgba(255, 255, 255, 0.7);
}

.footer-links h4,
.footer-contact h4,
.footer-social h4 {
    color: white;
    margin-bottom: 25px;
}

.footer-links ul {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.footer-links a {
    color: rgba(255, 255, 255, 0.7);
}

.footer-links a:hover {
    color: var(--secondary-color);
}

.footer-contact p {
    color: rgba(255, 255, 255, 0.7);
    display: flex;
    gap: 10px;
    margin-bottom: 10px;
}

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

.social-link {
    width: 45px;
    height: 45px;
    background-color: rgba(255, 255, 255, 0.1);
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    transition: var(--transition);
}

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

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding-top: 30px;
    text-align: center;
    color: rgba(255, 255, 255, 0.5);
}

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

    .hero-buttons {
        justify-content: center;
    }

    .hero-image {
        display: none;
    }

    .features-grid,
    .courses-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .footer-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .team-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .nav-menu {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background-color: var(--bg-white);
        flex-direction: column;
        padding: 20px;
        gap: 15px;
        box-shadow: var(--shadow-md);
    }

    .nav-menu.active {
        display: flex;
    }

    .mobile-menu-btn {
        display: flex;
    }

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

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

    .about-grid,
    .contact-grid {
        grid-template-columns: 1fr;
    }

    .article-card {
        grid-template-columns: 1fr;
    }

    .article-image {
        min-height: 150px;
    }

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

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

    .stats {
        margin: -20px 20px 0;
    }

    .stats-grid {
        grid-template-columns: 1fr 1fr;
        gap: 20px;
    }
}

@media (max-width: 480px) {
    h1 { font-size: 1.8rem; }
    h2 { font-size: 1.5rem; }

    .hero {
        padding: 120px 0 60px;
    }

    .hero-buttons {
        flex-direction: column;
    }

    .btn {
        width: 100%;
    }

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

    .stat-item h3 {
        font-size: 2rem;
    }
}