* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: Arial, sans-serif;
}

body {
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    background: #f5f5f5;
}

.gallery {
    width: 900px;
    background: white;
    padding: 30px;
    border-radius: 20px;
    text-align: center;
    box-shadow: 0 10px 30px rgba(0, 0, 0, .1);
}

.gallery h1 {
    margin-bottom: 25px;
    font-size: 2rem;
}

.main-image {
    width: 100%;
    height: 450px;
    overflow: hidden;
    border-radius: 20px;
    margin-bottom: 25px;
}

.main-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: 20px;
}

.thumbnails {
    display: flex;
    justify-content: center;
    gap: 15px;
    flex-wrap: wrap;
}

.thumb {
    width: 110px;
    height: 80px;
    object-fit: cover;
    border-radius: 10px;
    cursor: pointer;
    border: 3px solid transparent;
    transition: .3s;
}

.thumb:hover {
    transform: scale(1.05);
}

.thumb.active {
    border-color: #3498db;
}