:root {
    --primary-color: #4CAF50;
    --secondary-color: #2196F3;
    --dark-color: #333;
    --light-color: #f4f4f4;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    padding-top: 70px;
}

/* Navbar Styles */
.navbar-brand {
    font-size: 1.8rem;
    font-weight: bold;
}

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

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

/* Hero Section */
.hero-section {
    min-height: 90vh;
    padding: 50px 0;
    background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
    display: flex;
    align-items: center;
}

.hero-section h1 {
    font-size: 3rem;
    font-weight: bold;
    margin-bottom: 1.5rem;
    color: var(--dark-color);
}

.hero-section .lead {
    font-size: 1.25rem;
    margin-bottom: 2rem;
    color: #666;
}

/* Sections */
section {
    min-height: 90vh;
    padding: 80px 0 40px;
    display: flex;
    align-items: flex-start;
}

section h2 {
    font-size: 2.8rem;
    font-weight: bold;
    margin: 0 0 3rem;
    color: var(--dark-color);
    text-align: center;
    width: 100%;
    padding-top: 20px;
}

/* Course Cards */
.course-card {
    border-radius: 15px;
    overflow: hidden;
    box-shadow: 0 5px 15px rgba(0,0,0,0.1);
    transition: transform 0.3s ease;
    background: white;
}

.course-card:hover {
    transform: translateY(-10px);
}

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

.course-content {
    padding: 1.5rem;
}

.course-content h3 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
    color: var(--dark-color);
}

.course-meta {
    display: flex;
    justify-content: space-between;
    margin: 1rem 0;
    color: #666;
}

.course-meta i {
    margin-right: 5px;
    color: var(--primary-color);
}

/* Testimonials Section */
.testimonials-section {
    background-color: var(--light-color);
}

.testimonial-card {
    background: white;
    border-radius: 15px;
    padding: 2rem;
    height: 100%;
    box-shadow: 0 5px 15px rgba(0,0,0,0.1);
    text-align: center;
    position: relative;
    overflow: hidden;
    transition: transform 0.3s ease;
}

.testimonial-card:hover {
    transform: translateY(-5px);
}

.testimonial-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-size: cover;
    background-position: center;
    opacity: 0.1;
    z-index: 0;
}

.testimonial-card:nth-child(1)::before {
    background-image: url('testimonial-bg1.svg');
}

.testimonial-card:nth-child(2)::before {
    background-image: url('testimonial-bg2.svg');
}

.testimonial-card:nth-child(3)::before {
    background-image: url('testimonial-bg3.svg');
}

.testimonial-content {
    position: relative;
    z-index: 1;
}

.testimonial-img {
    width: 100px;
    height: 100px;
    border-radius: 50%;
    margin: 0 auto 1.5rem;
    display: block;
}

.social-links {
    margin-top: 2rem;
}

.social-link {
    display: inline-block;
    margin: 0 1rem;
    transition: transform 0.3s ease;
}

.social-link:hover {
    transform: translateY(-3px);
}

.social-icon {
    width: 24px;
    height: 24px;
}

.testimonial-card:hover {
    transform: translateY(-5px);
}

.testimonial-content {
    text-align: center;
}

.stars {
    color: #FFD700;
}

.testimonial-text {
    font-style: italic;
    margin: 1.5rem 0;
    color: #666;
}

.testimonial-author h4 {
    color: var(--dark-color);
    margin-bottom: 0.5rem;
}

.testimonial-author p {
    color: #666;
    margin: 0;
}

/* Features Section */
.features-section {
    padding: 80px 0;
    background-color: var(--light-color);
}

.feature-card {
    padding: 2rem;
    border-radius: 10px;
    background: white;
    box-shadow: 0 3px 10px rgba(0,0,0,0.1);
    height: 100%;
    transition: transform 0.3s ease;
}

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

.feature-card i {
    color: var(--primary-color);
}

.feature-card h3 {
    margin: 1rem 0;
    font-size: 1.5rem;
    color: var(--dark-color);
}

/* Contact Section */
.contact-section {
    padding: 80px 0;
}

.contact-form {
    background: white;
    padding: 2rem;
    border-radius: 15px;
    box-shadow: 0 5px 15px rgba(0,0,0,0.1);
}

.form-control {
    border-radius: 8px;
    padding: 0.8rem;
    margin-bottom: 1rem;
}

.btn-primary {
    background-color: var(--primary-color);
    border-color: var(--primary-color);
    padding: 0.8rem 2rem;
    border-radius: 8px;
    font-weight: 600;
    transition: all 0.3s ease;
}

.btn-primary:hover {
    background-color: darken(var(--primary-color), 10%);
    transform: translateY(-2px);
}

/* Footer */
.footer {
    background-color: var(--dark-color);
    color: white;
    padding: 60px 0 30px;
}

.footer h4 {
    margin-bottom: 1.5rem;
    font-size: 1.2rem;
}

.footer ul li {
    margin-bottom: 0.8rem;
}

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

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

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

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

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

/* Responsive Design */
@media (max-width: 768px) {
    .hero-section {
        padding: 60px 0;
        text-align: center;
    }

    .hero-section h1 {
        font-size: 2.5rem;
    }

    .feature-card {
        margin-bottom: 1.5rem;
    }
}