body {
    font-family: Arial, sans-serif;
    background: #f5f5f5;
    margin: 0;
}

.container {
    max-width: 500px;
    margin: 40px auto;
    padding: 20px;
    background: #fff;
    border-radius: 10px;
    box-shadow: 0 4px 12px rgba(0,0,0,0.1);
}

h1 {
    text-align: center;
    margin-bottom: 20px;
}

.course {
    display: flex;
    gap: 10px;
    margin-bottom: 10px;
}

.course input {
    flex: 1;
    padding: 10px;
    border: 1px solid #ddd;
    border-radius: 6px;
}

button {
    padding: 10px;
    margin-top: 10px;
    width: 100%;
    border: none;
    border-radius: 6px;
    background: #ddd;
    cursor: pointer;
}

button.primary {
    background: #0077ff;
    color: white;
}