body {
    font-family: Arial, sans-serif;
    background: #f4f4f4;
    text-align: center;
    padding: 20px;
}

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

button {
    background: blue;
    color: white;
    padding: 10px;
    border: none;
    cursor: pointer;
}

button:hover {
    background: darkblue;
}

#gallery {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-top: 20px;
    justify-content: center;
}

.thumbnail {
    width: 100px;
    height: 100px;
    object-fit: cover;
    cursor: pointer;
    border-radius: 5px;
}

.fullscreen {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.8);
    display: flex;
    justify-content: center;
    align-items: center;
}

.fullscreen img, .fullscreen video {
    max-width: 90%;
    max-height: 90%;
}

.fullscreen:hover {
    cursor: pointer;
}