body {
    text-align: center;
    font-family: Arial, sans-serif;
}

h2 {
    margin-bottom: 20px;
}

.back-btn {
    text-decoration: none;
    padding: 8px 15px;
    background: #007BFF;
    color: white;
    border-radius: 5px;
    display: inline-block;
    margin-bottom: 20px;
}

.grid-container {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
    gap: 15px;
    justify-content: center;
    padding: 20px;
}

.grid-item {
    position: relative;
    text-align: center;
    background: #f4f4f4;
    padding: 10px;
    border-radius: 10px;
}

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

.grid-item img:hover {
    transform: scale(1.05);
}

.download-btn {
    display: inline-block;
    margin-top: 5px;
    text-decoration: none;
    color: white;
    background: green;
    padding: 5px 10px;
    border-radius: 5px;
}

.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0,0,0,0.8);
    text-align: center;
}

.modal-content {
    max-width: 90%;
    margin-top: 5%;
}

.close {
    position: absolute;
    top: 10px;
    right: 20px;
    color: white;
    font-size: 30px;
    cursor: pointer;
}