* {
    box-sizing: border-box;
}

body {
    margin: 0;
    padding: 0;
    font-family: Arial, sans-serif;
    background: #f4f6f9;
    color: #1e293b;
}

.container {
    max-width: 800px;
    margin: 100px auto;
    padding: 40px;
    background: #ffffff;
    border-radius: 12px;
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.08);
}

h1 {
    margin-top: 0;
}

button {
    padding: 12px 20px;
    background: #2563eb;
    color: white;
    border: none;
    border-radius: 6px;
    cursor: pointer;
}

button:hover {
    background: #1d4ed8;
}

pre {
    margin-top: 20px;
    padding: 15px;
    background: #e2e8f0;
    border-radius: 6px;
    overflow-x: auto;
}