* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: Arial, sans-serif;
    background-color: #ffffff;
    color: #333333;
    line-height: 1.6;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
}

.header {
    text-align: center;
    margin-bottom: 30px;
}

.header h1 {
    font-size: 24px;
    color: #333333;
}

.main-content {
    display: flex;
    gap: 30px;
    flex-wrap: wrap;
}

.left-panel {
    flex: 1;
    min-width: 300px;
    background-color: #ffffff;
    padding: 20px;
    border: 1px solid #dddddd;
    border-radius: 8px;
}

.right-panel {
    flex: 1;
    min-width: 300px;
    background-color: #ffffff;
    padding: 20px;
    border: 1px solid #dddddd;
    border-radius: 8px;
}

section {
    margin-bottom: 25px;
}

section h2 {
    font-size: 18px;
    margin-bottom: 15px;
    color: #333333;
}

label {
    display: block;
    margin-bottom: 8px;
    font-weight: bold;
    font-size: 14px;
}

input[type="file"],
input[type="number"],
textarea {
    width: 100%;
    padding: 10px;
    border: 1px solid #dddddd;
    border-radius: 4px;
    font-size: 14px;
    margin-bottom: 10px;
}

input[type="color"] {
    width: 50px;
    height: 50px;
    border: none;
    border-radius: 4px;
    cursor: pointer;
}

textarea {
    resize: vertical;
    min-height: 100px;
}

button {
    background-color: #4caf50;
    color: white;
    padding: 12px 20px;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    font-size: 14px;
    margin-right: 10px;
    margin-bottom: 10px;
}

button:hover {
    background-color: #45a049;
}

.preview-container {
    text-align: center;
    margin-top: 20px;
}

#previewCanvas {
    max-width: 100%;
    border: 1px solid #dddddd;
    border-radius: 4px;
}

@media (max-width: 768px) {
    .main-content {
        flex-direction: column;
    }
    
    .left-panel,
    .right-panel {
        min-width: 100%;
    }
}