* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    font-family: Arial, sans-serif;
}

header {
    background-color: #333;
    color: white;
    padding: 1rem;
    text-align: center;
    background: linear-gradient(135deg, #d2aef7, #c1d8fc);
}

main {
    flex: 1;
    padding: 2rem;
}

.gallery {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
    justify-content: center;
}

.image-box {
    width: 350px;
    height: 350px;
    position: relative;
    overflow: hidden;
    border-radius: 8px;
    box-shadow: 0 2px 5px rgba(0,0,0,0.2);
}

.image-box img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.3s ease;
}

.image-box:hover img:first-child {
    display: none;
}

.image-box img:last-child {
    display: none;
    position: absolute;
    top: 0;
    left: 0;
}

.image-box:hover img:last-child {
    display: block;
}

footer {
    background-color: #333;
    color: white;
    padding: 1rem;
    text-align: center;
    background: linear-gradient(135deg, #d2aef7, #c1d8fc);
}

@media (max-width: 768px) {
    .image-box {
        width: 150px;
        height: 150px;
    }
}