:root {
    --primary: #2c3e50;
    --secondary: #3498db;
    --dark: #1a1a1a;
    --light: #ecf0f1;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    color: var(--dark);
    background-color: #f5f5f5;
    margin: 0;
    padding: 0;
}

header {
    background-color: var(--primary);
    color: white;
    padding: 2rem 0;
    text-align: center;
    margin-bottom: 2rem;
}

h1 {
    margin: 0;
    font-size: 2.5rem;
}

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

.demo-section {
    background: white;
    border-radius: 8px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    padding: 2rem;
    margin-bottom: 2rem;
}

.demo-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(500px, 1fr));
    gap: 2rem;
    margin-top: 2rem;
}

.demo-item {
    border: 1px solid #ddd;
    border-radius: 6px;
    padding: 1.5rem 0;
    display: flex;
    flex-direction: column;
    align-items: center;
}

.led-container {
    margin: 1rem auto;
    padding: 10px;
    background: var(--dark);
    border-radius: 6px;
    display: inline-block;
    &.transparent {
        background: transparent;
    } 
}

.config-table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 1rem;
}

.config-table th, .config-table td {
    border: 1px solid #ddd;
    padding: 12px;
    text-align: left;
}

.config-table th {
    background-color: var(--primary);
    color: white;
}

.config-table tr:nth-child(even) {
    background-color: #f2f2f2;
}

code {
    background: #f4f4f4;
    padding: 2px 5px;
    border-radius: 3px;
    font-family: monospace;
}

.btn {
    display: inline-block;
    background: var(--secondary);
    color: white;
    padding: 10px 20px;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    text-decoration: none;
    font-size: 16px;
    margin: 10px 0;
}

.btn:hover {
    background: #2980b9;
}

footer {
    text-align: center;
    padding: 2rem 0;
    background: var(--primary);
    color: white;
    margin-top: 2rem;
}