* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: Arial, sans-serif;
}

body {
    background-color: #f0f0f0;
    padding: 20px;
}

.container {
    max-width: 800px;
    margin: 0 auto;
    background-color: white;
    padding: 30px;
    border-radius: 10px;
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.1);
}

h1 {
    text-align: center;
    color: #333;
    margin-bottom: 30px;
}

h2 {
    margin: 20px 0;
    color: #444;
}

.input-section, .output-section {
    margin-bottom: 30px;
}

label {
    display: block;
    margin-bottom: 10px;
    font-weight: bold;
    color: #555;
}

input[type="text"] {
    width: 100%;
    padding: 12px;
    border: 1px solid #ddd;
    border-radius: 5px;
    font-size: 16px;
    margin-bottom: 15px;
}

button {
    background-color: #4CAF50;
    color: white;
    border: none;
    padding: 12px 20px;
    border-radius: 5px;
    cursor: pointer;
    font-size: 16px;
    transition: background-color 0.3s;
}

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

#binary-output {
    width: 100%;
    min-height: 200px;
    padding: 12px;
    border: 1px solid #ddd;
    border-radius: 5px;
    font-family: monospace;
    font-size: 12px;
    margin-top: 15px;
    resize: vertical;
    white-space: pre-wrap;
    word-break: break-all;
}

.qr-preview {
    display: flex;
    justify-content: center;
    margin: 20px 0;
}

#copy-btn {
    background-color: #2196F3;
}

#copy-btn:hover {
    background-color: #0b7dda;
}

canvas {
    display: none;
}

@media (max-width: 600px) {
    .container {
        padding: 15px;
    }
    
    button {
        width: 100%;
    }
}