body {
    font-family: Arial, sans-serif;
    background: #f5f7fa;
    padding: 20px;
    margin: 0;
}

.back-btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    text-decoration: none;
    background: #0ea5e9;
    color: #fff;
    padding: 10px 18px;
    border-radius: 8px;
    font-size: 16px;
    font-weight: 600;
    transition: 0.2s;
}

.back-btn:hover {
    background: #0284c7;
}

.gallery-box {
    max-width: 900px;
    margin: 0 auto;
}

.gallery-img {
    width: 100%;
    display: block;
    margin-bottom: 18px;
    border-radius: 12px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.12);
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.gallery-img:hover {
    transform: scale(1.01);
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.18);
}