/* Reset and base styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

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

/* Navigation */
header {
    background-color: #fff;
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 1000;
    padding: 1rem 0;
}

nav {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 0 5%;
    max-width: 1200px;
    margin: 0 auto;
}

.logo {
    font-size: 3rem;
    font-weight: bold;
    color: #3498db;
}

.nav-links {
    display: flex;
    list-style: none;
    background: #f8f9fa;
    border-radius: 5px;
    padding: 0.8rem;
    width: 100%;
    justify-content: center;
}

.nav-links li {
    margin: 0 1rem;
}

.nav-links a {
    text-decoration: none;
    color: #2c3e50;
    font-weight: 500;
    padding: 0.8rem 1.5rem;
    border-radius: 3px;
    transition: all 0.3s ease;
    font-size: 1.1rem;
}

.nav-links a:hover {
    background-color: #e9ecef;
    color: #3498db;
}

.nav-links a.active {
    background-color: #3498db;
    color: white;
}

/* Main Content Layout */
main {
    margin-top: 140px;
    padding: 2rem 5%;
    min-height: calc(100vh - 140px);
}

.content-wrapper {
    display: grid;
    grid-template-columns: 1fr 1px 1fr;
    gap: 2rem;
    max-width: 1200px;
    margin: 0 auto;
    padding-bottom: 2rem;
}

.content-divider {
    background-color: #e9ecef;
    height: 100%;
}

/* Features Section */
.features {
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

.feature-card {
    text-align: left;
    padding: 2rem;
    background: #fff;
    border-radius: 10px;
    box-shadow: 0 3px 10px rgba(0,0,0,0.1);
    transition: transform 0.3s ease;
}

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

.feature-card i {
    font-size: 2.5rem;
    color: #3498db;
    margin-bottom: 1rem;
}

/* Contact Card */
.contact-card {
    background: white;
    padding: 2rem;
    border-radius: 10px;
    box-shadow: 0 3px 15px rgba(0,0,0,0.1);
    height: fit-content;
}

.contact-card h3 {
    color: #2c3e50;
    margin-bottom: 1.5rem;
}

.contact-info {
    margin-bottom: 1.5rem;
}

.contact-info p {
    margin-bottom: 0.5rem;
    display: flex;
    align-items: center;
}

.contact-info i {
    color: #3498db;
    margin-right: 1rem;
    width: 1.5rem;
}

/* CTA Section */
.cta-section {
    background-color: #3498db;
    color: white;
    text-align: center;
    padding: 4rem 1rem;
    margin-top: 4rem;
}

.cta-button {
    display: inline-block;
    padding: 1rem 2rem;
    background-color: #2c3e50;
    color: white;
    text-decoration: none;
    border-radius: 5px;
    transition: background-color 0.3s ease;
    margin-top: 1rem;
}

.cta-button:hover {
    background-color: #1a252f;
}

/* Footer */
footer {
    background-color: #2c3e50;
    color: white;
    padding: 1rem 5%;
    text-align: center;
}

.footer-bottom {
    margin: 0;
    padding: 0;
}

/* Mobile Navigation */
.burger {
    display: none;
    cursor: pointer;
}

.burger div {
    width: 25px;
    height: 3px;
    background-color: #2c3e50;
    margin: 5px;
    transition: all 0.3s ease;
}

/* Course Overview Section */
.course-overview {
    padding: 4rem 5%;
    max-width: 1200px;
    margin: 0 auto;
}

.course-overview h2 {
    text-align: center;
    color: #2c3e50;
    margin-bottom: 2rem;
}

.course-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.course-card {
    background: white;
    padding: 2rem;
    border-radius: 10px;
    box-shadow: 0 3px 15px rgba(0,0,0,0.1);
    transition: transform 0.3s ease;
}

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

.course-card h3 {
    color: #2c3e50;
    margin-bottom: 1rem;
}

.course-card ul {
    list-style: none;
    margin: 1rem 0;
}

.course-card ul li {
    margin-bottom: 0.5rem;
    padding-left: 1.5rem;
    position: relative;
}

.course-card ul li:before {
    content: "✓";
    color: #3498db;
    position: absolute;
    left: 0;
}

/* Why Choose Us Section */
.why-choose-us {
    padding: 4rem 5%;
    background-color: #f8f9fa;
}

.why-choose-us h2 {
    text-align: center;
    color: #2c3e50;
    margin-bottom: 2rem;
}

.benefits-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    max-width: 1200px;
    margin: 0 auto;
}

.benefit-item {
    text-align: center;
    padding: 2rem;
    background: white;
    border-radius: 10px;
    box-shadow: 0 3px 10px rgba(0,0,0,0.1);
}

.benefit-item i {
    font-size: 2.5rem;
    color: #3498db;
    margin-bottom: 1rem;
}

.benefit-item h3 {
    color: #2c3e50;
    margin-bottom: 1rem;
}

/* Responsive Design */
@media screen and (max-width: 768px) {
    .nav-links {
        position: absolute;
        right: 0;
        height: 92vh;
        top: 8vh;
        background-color: white;
        display: flex;
        flex-direction: column;
        align-items: center;
        width: 50%;
        transform: translateX(100%);
        transition: transform 0.5s ease-in;
        padding: 2rem 0;
    }

    .nav-links::before,
    .nav-links::after {
        display: none;
    }

    .nav-links li {
        margin: 1rem 0;
    }

    .burger {
        display: block;
    }

    .nav-active {
        transform: translateX(0%);
    }

    .content-wrapper {
        grid-template-columns: 1fr;
    }

    .content-divider {
        display: none;
    }

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

    .course-grid,
    .benefits-grid {
        grid-template-columns: 1fr;
    }
}