/* Reset and base styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Arial', sans-serif;
}

body {
    background-color: #f5f5f5;
    color: #333;
    line-height: 1.6;
}

/* Navigation styles */
.navbar {
    background-color: #2c3e50;
    padding: 1rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
}

.logo {
    color: white;
    font-size: 1.5rem;
    font-weight: bold;
}

.nav-links {
    display: flex;
    list-style: none;
    gap: 2rem;
}

.nav-links a {
    color: white;
    text-decoration: none;
    padding: 0.5rem 1rem;
    transition: background-color 0.3s;
}

.nav-links a:hover {
    background-color: #34495e;
    border-radius: 4px;
}

/* Dropdown styles */
.dropdown {
    position: relative;
}

.dropdown-content {
    display: none;
    position: absolute;
    background-color: #34495e;
    min-width: 200px;
    box-shadow: 0 8px 16px rgba(0,0,0,0.2);
    z-index: 1;
    border-radius: 4px;
}

.dropdown:hover .dropdown-content {
    display: block;
}

.dropdown-content a {
    display: block;
    padding: 0.8rem 1rem;
    color: white;
    text-decoration: none;
}

.dropdown-content a:hover {
    background-color: #2c3e50;
}

/* Hero section */
.hero {
    background: linear-gradient(rgba(0,0,0,0.5), rgba(0,0,0,0.5)), url('https://images.unsplash.com/photo-1523050854058-8df90110c9f1?ixlib=rb-1.2.1&auto=format&fit=crop&w=1350&q=80');
    background-size: cover;
    background-position: center;
    height: 60vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    text-align: center;
    color: white;
    padding: 2rem;
}

.hero h1 {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.hero p {
    font-size: 1.2rem;
}

/* Content section */
.content {
    max-width: 1200px;
    margin: 2rem auto;
    padding: 0 2rem;
}

.content h1 {
    color: #2c3e50;
    margin-bottom: 2rem;
    text-align: center;
}

.course-section {
    margin-bottom: 3rem;
}

.course-section h2 {
    color: #2c3e50;
    margin-bottom: 2rem;
    padding-bottom: 0.5rem;
    border-bottom: 2px solid #2c3e50;
}

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

.course-card {
    background: white;
    padding: 1.5rem;
    border-radius: 8px;
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
    transition: transform 0.3s, box-shadow 0.3s;
}

.course-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 5px 15px rgba(0,0,0,0.2);
}

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

.course-card p {
    margin-bottom: 0.5rem;
    color: #666;
}

.course-card ul {
    margin: 1rem 0;
    padding-left: 1.5rem;
}

.course-card li {
    margin-bottom: 0.5rem;
    color: #666;
}

/* Button styles */
.btn {
    display: inline-block;
    background-color: #2c3e50;
    color: white;
    padding: 0.8rem 1.5rem;
    border-radius: 4px;
    text-decoration: none;
    margin-top: 1rem;
    transition: background-color 0.3s;
}

.btn:hover {
    background-color: #34495e;
}

/* Responsive design */
@media (max-width: 768px) {
    .navbar {
        flex-direction: column;
        padding: 1rem;
    }

    .nav-links {
        margin-top: 1rem;
        flex-direction: column;
        align-items: center;
        gap: 1rem;
    }

    .dropdown-content {
        position: static;
        width: 100%;
        box-shadow: none;
    }

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

    .hero p {
        font-size: 1rem;
    }

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