/* Global Styles */
:root {
    --primary-color: #2563eb;
    --primary-dark: #1d4ed8;
    --secondary-color: #f59e0b;
    --text-dark: #1f2937;
    --text-light: #6b7280;
    --bg-light: #f8fafc;
    --white: #ffffff;
    --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
}

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

body {
    font-family: 'Poppins', sans-serif;
    line-height: 1.6;
    color: var(--text-dark);
    overflow-x: hidden;
}

/* Typography */
.section-title {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 1rem;
    color: var(--text-dark);
}

.section-subtitle {
    font-size: 1.1rem;
    color: var(--text-light);
    margin-bottom: 2rem;
}

/* Navigation */
.navbar {
    transition: all 0.3s ease;
    padding: 1rem 0;
}

.navbar-brand {
    font-size: 1.5rem;
    font-weight: 700;
}

.nav-link {
    font-weight: 500;
    margin: 0 0.5rem;
    transition: color 0.3s ease;
}

.nav-link:hover {
    color: var(--primary-color) !important;
}

/* Hero Section */
.hero-section {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    position: relative;
    overflow: hidden;
}

.hero-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 1000 1000"><polygon fill="rgba(255,255,255,0.1)" points="0,1000 1000,0 1000,1000"/></svg>');
    background-size: cover;
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: 1.5rem;
}

.hero-subtitle {
    font-size: 1.3rem;
    font-weight: 500;
    margin-bottom: 1rem;
}

.hero-description {
    font-size: 1.1rem;
    opacity: 0.9;
    margin-bottom: 2rem;
}

.hero-buttons {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
}

.hero-video-container {
    position: relative;
    height: 400px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.video-placeholder {
    background: rgba(255, 255, 255, 0.1);
    border: 2px dashed rgba(255, 255, 255, 0.3);
    border-radius: 20px;
    padding: 3rem;
    text-align: center;
    backdrop-filter: blur(10px);
}

.video-placeholder i {
    font-size: 4rem;
    margin-bottom: 1rem;
    opacity: 0.7;
}

/* Features Section */
.features-section {
    background: var(--white);
}

.feature-card {
    background: var(--white);
    border-radius: 15px;
    box-shadow: var(--shadow);
    transition: all 0.3s ease;
    border: 1px solid #e5e7eb;
}

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

.feature-icon {
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1.5rem;
}

.feature-icon i {
    font-size: 2rem;
    color: white;
}

/* Teachers Section */
.teacher-card {
    background: var(--white);
    border-radius: 15px;
    padding: 2rem;
    box-shadow: var(--shadow);
    transition: all 0.3s ease;
    border: 1px solid #e5e7eb;
}

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

.teacher-avatar img {
    width: 120px;
    height: 120px;
    object-fit: cover;
    border: 4px solid var(--primary-color);
}

.teacher-rating {
    color: var(--text-light);
    font-size: 0.9rem;
}

/* Courses Section */
.course-card {
    background: var(--white);
    border-radius: 15px;
    box-shadow: var(--shadow);
    transition: all 0.3s ease;
    border: 1px solid #e5e7eb;
}

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

.course-icon {
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, var(--secondary-color), #d97706);
    border-radius: 15px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 1.5rem;
}

.course-icon i {
    font-size: 1.5rem;
    color: white;
}

.course-features {
    list-style: none;
    padding: 0;
}

.course-features li {
    margin-bottom: 0.5rem;
    font-size: 0.95rem;
}

/* Pricing Section */
.pricing-card {
    background: var(--white);
    border-radius: 15px;
    box-shadow: var(--shadow);
    transition: all 0.3s ease;
    border: 1px solid #e5e7eb;
    position: relative;
}

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

.pricing-card.popular {
    border: 2px solid var(--primary-color);
    transform: scale(1.05);
}

.popular-badge {
    position: absolute;
    top: -10px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--primary-color);
    color: white;
    padding: 0.5rem 1rem;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 600;
}

.pricing-header h4 {
    color: var(--text-dark);
    margin-bottom: 1rem;
}

.price {
    margin-bottom: 1rem;
}

.price .currency {
    font-size: 1.2rem;
    color: var(--text-light);
}

.price .amount {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--primary-color);
}

.price .period {
    font-size: 1rem;
    color: var(--text-light);
}

.pricing-features {
    list-style: none;
    padding: 0;
}

.pricing-features li {
    margin-bottom: 0.75rem;
    font-size: 0.95rem;
}

/* Contact Section */
.contact-info {
    margin-bottom: 2rem;
}

.contact-item {
    display: flex;
    align-items: center;
    font-size: 1rem;
}

.contact-form {
    background: var(--white);
    padding: 2rem;
    border-radius: 15px;
    box-shadow: var(--shadow);
}

.social-links {
    display: flex;
    gap: 1rem;
}

.social-link {
    width: 40px;
    height: 40px;
    background: var(--primary-color);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    text-decoration: none;
    transition: all 0.3s ease;
}

.social-link:hover {
    background: var(--primary-dark);
    transform: translateY(-2px);
    color: white;
}

/* Trial Section */
.trial-section {
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
}

/* Footer */
.footer {
    background: var(--text-dark);
}

.footer a {
    text-decoration: none;
    transition: color 0.3s ease;
}

.footer a:hover {
    color: var(--primary-color) !important;
}

/* Buttons */
.btn {
    border-radius: 10px;
    font-weight: 600;
    padding: 0.75rem 1.5rem;
    transition: all 0.3s ease;
    border: none;
}

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

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

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

.btn-outline-primary:hover {
    background: var(--primary-color);
    border-color: var(--primary-color);
    transform: translateY(-2px);
}

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

.btn-light:hover {
    background: #f8f9fa;
    color: var(--primary-dark);
    transform: translateY(-2px);
}

/* Form Controls */
.form-control, .form-select {
    border-radius: 10px;
    border: 1px solid #e5e7eb;
    padding: 0.75rem 1rem;
    transition: all 0.3s ease;
}

.form-control:focus, .form-select:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 0.2rem rgba(37, 99, 235, 0.25);
}

/* Responsive Design */
@media (max-width: 768px) {
    .hero-title {
        font-size: 2.5rem;
    }
    
    .section-title {
        font-size: 2rem;
    }
    
    .hero-buttons {
        flex-direction: column;
    }
    
    .hero-video-container {
        height: 300px;
        margin-top: 2rem;
    }
    
    .pricing-card.popular {
        transform: none;
    }
    
    .contact-form {
        margin-top: 2rem;
    }
}

@media (max-width: 576px) {
    .hero-title {
        font-size: 2rem;
    }
    
    .section-title {
        font-size: 1.75rem;
    }
    
    .hero-subtitle {
        font-size: 1.1rem;
    }
    
    .feature-icon {
        width: 60px;
        height: 60px;
    }
    
    .feature-icon i {
        font-size: 1.5rem;
    }
}

/* Animations */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeInLeft {
    from {
        opacity: 0;
        transform: translateX(-30px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes fadeInRight {
    from {
        opacity: 0;
        transform: translateX(30px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

/* Smooth scrolling */
html {
    scroll-behavior: smooth;
}

/* Loading animation */
.loading {
    opacity: 0;
    animation: fadeInUp 0.6s ease forwards;
}

/* Hover effects */
.card-hover {
    transition: all 0.3s ease;
}

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

/* Custom scrollbar */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: #f1f1f1;
}

::-webkit-scrollbar-thumb {
    background: var(--primary-color);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--primary-dark);
}