:root {
    --primary-color: #2c3e50;
    --secondary-color: #3498db;
    --success-color: #2ecc71;
    --error-color: #e74c3c;
    --background-color: #ecf0f1;
    --text-color: #333;
}

body {
    font-family: 'Segoe UI', Arial, sans-serif;
    margin: 0;
    padding: 20px;
    background-color: var(--background-color);
    color: var(--text-color);
    line-height: 1.6;
}

header {
    display: flex;
    gap: 10px;
    margin-bottom: 20px;
    align-items: center;
}

button {
    padding: 10px 20px;
    border: none;
    border-radius: 5px;
    background-color: var(--secondary-color);
    color: white;
    cursor: pointer;
    font-size: 16px;
    transition: background-color 0.3s;
}

button:hover:not(:disabled) {
    background-color: #2980b9;
}

button:disabled {
    background-color: #95a5a6;
    cursor: not-allowed;
}

main {
    max-width: 800px;
    margin: 0 auto;
}

#notSupported {
    background-color: var(--error-color);
    color: white;
    padding: 15px;
    border-radius: 5px;
    margin-bottom: 20px;
}

#log {
    background-color: white;
    border-radius: 5px;
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
    padding: 15px;
    height: 400px;
    overflow-y: auto;
    font-family: 'Courier New', monospace;
    font-size: 14px;
    border: 1px solid #ccc;
}

#log > div {
    margin: 1px 0;
    line-height: 14px;
    white-space: pre;
}

h1 {
    color: var(--primary-color);
    margin: 0 0 20px 0;
    font-size: 24px;
}

#instructions {
    background-color: white;
    padding: 15px;
    border-radius: 5px;
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
    margin-bottom: 20px;
}

#instructions ol {
    margin: 0;
    padding-left: 20px;
}

#instructions li {
    margin-bottom: 10px;
}

select {
    padding: 10px;
    border-radius: 5px;
    font-size: 16px;
}