body {
    font-family: 'Arial', sans-serif;
    background-color: #f0f2f5;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    margin: 0;
    padding: 20px;
    box-sizing: border-box;
}

.container {
    background-color: #ffffff;
    padding: 30px;
    border-radius: 10px;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
    text-align: center;
    max-width: 500px;
    width: 100%;
}

h1, h2 {
    color: #333;
}

.controls {
    display: flex;
    justify-content: space-around;
    margin-bottom: 25px;
    flex-wrap: wrap;
    gap: 15px;
}

.controls div {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
}

label {
    margin-bottom: 5px;
    font-weight: bold;
    color: #555;
}

input, select {
    padding: 8px;
    border: 1px solid #ccc;
    border-radius: 5px;
    font-size: 16px;
    width: 120px;
}

.stamp-preview {
    margin: 20px auto;
    border: 2px dashed #ddd;
    padding: 10px;
    display: inline-block;
    background-image:
        linear-gradient(45deg, #f9f9f9 25%, transparent 25%),
        linear-gradient(-45deg, #f9f9f9 25%, transparent 25%),
        linear-gradient(45deg, transparent 75%, #f9f9f9 75%),
        linear-gradient(-45deg, transparent 75%, #f9f9f9 75%);
    background-size: 20px 20px;
    background-position: 0 0, 0 10px, 10px -10px, -10px 0px;
}

#stampCanvas {
    width: 300px; /* Display size */
    height: 300px; /* Display size */
    background-color: transparent;
}

button {
    background-color: #007bff;
    color: white;
    padding: 12px 25px;
    border: none;
    border-radius: 5px;
    font-size: 16px;
    cursor: pointer;
    transition: background-color 0.3s ease;
}

button:hover {
    background-color: #0056b3;
}