body {
    font-family: Arial, sans-serif;
    background-color: black;
    color: white;
    text-align: center;
    margin: 0;
    padding: 0;
}

header {
    background: linear-gradient(to right, purple, black);
    padding: 20px;
    transition: background 1s ease; /* transition 1 */
}

header:hover {
    background: linear-gradient(to right, blue, black);
}

.videos, .audios, .gallery {
    margin: 20px;
}

/* TRANSFORMATIONS + TRANSITIONS */
.transform1 {
    width: 200px;
    margin: 10px;
    transition: transform 0.5s ease; /* transition 2 */
}

.transform1:hover {
    transform: rotate(15deg); /* transformation 1 */
}

.transform2 {
    width: 200px;
    margin: 10px;
    transition: transform 0.5s ease; /* transition 3 */
}

.transform2:hover {
    transform: scale(1.2); /* transformation 2 */
}

.transform3 {
    width: 200px;
    margin: 10px;
    transition: transform 0.5s ease;
}

.transform3:hover {
    transform: translateY(-10px); /* transformation 3 */
}

/* EXTRA CREDIT ANIMATION */
.moving-star {
    width: 50px;
    height: 50px;
    background-color: yellow;
    border-radius: 50%;
    margin: 20px auto;
    animation: starMove 4s infinite alternate;
}

@keyframes starMove {
    0% { transform: translateX(0); background-color: yellow; }
    50% { transform: translateX(200px); background-color: orange; }
    100% { transform: translateX(-200px); background-color: red; }
}