body {
    font-family: Arial, sans-serif;
    margin: 40px;
    text-align: center;
    background: #f9f9f9;
}

h1 {
    color: #333;
}

form {
    margin: 20px 0;
}

.gallery {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 20px;
}

.thumb {
    background: #dfefff;
    border: 1px solid #ccc;
    padding: 10px;
    width: 350px;
    border-radius: 6px;
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
}

.thumb img {
    width: 100%;
    height: auto;
    border-radius: 5px;
    cursor: pointer;
    transition: transform 0.2s;
}

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

.caption {
    margin-top: 8px;
    font-weight: bold;
}

.lightbox {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0,0,0,0.9);
    justify-content: center;
    align-items: center;
    flex-direction: column;
    z-index: 1000;
}

.lightbox img {
    max-width: 90%;
    max-height: 80%;
    border: 3px solid #fff;
    border-radius: 10px;
}

#lightbox-caption {
    color: white;
    margin-top: 15px;
    font-size: 1.2em;
}