:root {
    --primary-color: #4A90E2;
    --secondary-color: #F5A623;
    --accent-color: #7ED321;
    --dark-color: #333;
    --light-color: #fff;
    --font-family: 'Poppins', sans-serif;
}

body {
    font-family: var(--font-family);
    margin: 0;
    background-color: #f4f4f4;
    color: var(--dark-color);
    background-image: url('data:image/svg+xml,%3Csvg width="100" height="100" viewBox="0 0 100 100" xmlns="http://www.w3.org/2000/svg"%3E%3Cpath d="M11 18c3.866 0 7-3.134 7-7s-3.134-7-7-7-7 3.134-7 7 3.134 7 7 7zm48 25c3.866 0 7-3.134 7-7s-3.134-7-7-7-7 3.134-7 7 3.134 7 7 7zm-48 0c3.866 0 7-3.134 7-7s-3.134-7-7-7-7 3.134-7 7 3.134 7 7 7zm48 25c3.866 0 7-3.134 7-7s-3.134-7-7-7-7 3.134-7 7 3.134 7 7 7z" fill="%23000" fill-opacity="0.02"/%3E%3C/svg%3E');
}

header {
    background-color: var(--light-color);
    padding: 1rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

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

nav a {
    margin: 0 1rem;
    text-decoration: none;
    color: var(--dark-color);
    transition: color 0.3s ease;
}

nav a:hover {
    color: var(--primary-color);
    text-shadow: 0 0 10px var(--primary-color);

}

main {
    padding: 2rem;
}

.hero {
    text-align: center;
    padding: 4rem 2rem;
    background-color: var(--primary-color);
    color: var(--light-color);
    border-radius: 8px;
}

.hero h1 {
    font-size: 3rem;
    margin: 0;
}

.course-list {
    margin-top: 2rem;
}

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

footer {
    text-align: center;
    padding: 1rem;
    background-color: var(--dark-color);
    color: var(--light-color);
    position: absolute;
    bottom: 0;
    width: 100%;
}

/* Responsive Design */
@media (max-width: 768px) {
    header {
        flex-direction: column;
    }

    nav {
        margin-top: 1rem;
    }

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