body {
    font-family: Arial, sans-serif;
    background: #f4f6f8;
    margin: 0;
    padding: 0;
}

.container {
    max-width: 1200px;
    margin: 40px auto;
    background: #fff;
    padding: 30px;
    border-radius: 8px;
}

h1 {
    margin-bottom: 20px;
}

.cards {
    display: flex;
    gap: 20px;
    margin-bottom: 30px;
}

.card {
    flex: 1;
    padding: 20px;
    border-radius: 6px;
    border: 1px solid #ddd;
    background: #fafafa;
    cursor: pointer;
    font-size: 16px;
}

.card:hover {
    background: #eef3f8;
}

.card.disabled {
    cursor: not-allowed;
    opacity: 0.5;
}

.workspace {
    border-top: 1px solid #ddd;
    padding-top: 20px;
    min-height: 200px;
}
.form-group {
    margin-bottom: 15px;
}

label {
    display: block;
    margin-bottom: 5px;
    font-weight: bold;
}

input[type="file"] {
    width: 100%;
}

button[type="submit"] {
    padding: 10px 20px;
    background: #1f6feb;
    color: white;
    border: none;
    border-radius: 4px;
    cursor: pointer;
}

button[type="submit"]:hover {
    background: #1557c0;
}