body {
    font-family: Arial, sans-serif;
    background: #f0f0f0;
    margin: 0;
    padding: 0;
}

nav {
    display: flex;
    justify-content: space-between;
    background-color: #333;
    color: white;
    padding: 1rem 2rem;
}

nav .logo {
    font-size: 1.5rem;
}

nav .login a {
    color: white;
    text-decoration: none;
}

.cards-container {
    display: flex;
    justify-content: center;
    gap: 2rem;
    padding: 2rem;
    flex-wrap: wrap;
}

.card {
    background: white;
    border-radius: 10px;
    box-shadow: 0 0 10px #aaa;
    padding: 1rem;
    width: 200px;
    text-align: center;
}

.dropdown {
    margin-top: 1rem;
    display: none;
    flex-direction: column;
    gap: 0.5rem;
}

.dropdown button {
    padding: 0.5rem;
    border: none;
    background-color: #4CAF50;
    color: white;
    cursor: pointer;
    border-radius: 5px;
}

.video-container {
    margin: 2rem auto;
    text-align: center;
}