.pdf-container {
    max-width: 800px;
    margin: 40px auto;
    text-align: center;
    font-family: Arial;
}

#preview img {
    width: 120px;
    margin: 10px;
    border-radius: 6px;
    box-shadow: 0 0 5px rgba(0,0,0,.3);
}

button {
    padding: 12px 30px;
    background: #e74c3c;
    border: none;
    color: white;
    font-size: 16px;
    cursor: pointer;
    border-radius: 6px;
}

.download-btn {
    display: inline-block;
    margin-top: 20px;
    padding: 12px 30px;
    background: #27ae60;
    color: white;
    text-decoration: none;
    border-radius: 6px;
}