* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: Arial, sans-serif;
}

header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px 50px;
    background: #0d6efd;
    color: white;
}

nav ul {
    display: flex;
    list-style: none;
}

nav ul li {
    margin: 0 15px;
}

nav ul li a {
    color: white;
    text-decoration: none;
}

.btn {
    padding: 8px 15px;
    border: none;
    background: white;
    color: #0d6efd;
    cursor: pointer;
    border-radius: 5px;
}

.hero {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 60px;
    background: #f8f9fa;
}

.hero-text h1 {
    font-size: 40px;
    margin-bottom: 20px;
}

.courses {
    padding: 50px;
    text-align: center;
}

.course-box {
    display: flex;
    justify-content: center;
    gap: 20px;
    margin-top: 30px;
}

.card {
    background: white;
    padding: 20px;
    width: 250px;
    box-shadow: 0 0 10px rgba(0,0,0,0.1);
    border-radius: 10px;
}

footer {
    background: #0d6efd;
    color: white;
    text-align: center;
    padding: 15px;
    margin-top: 40px;
}