.demo-container {
    font-family: Arial, sans-serif;
    max-width: 600px;
    margin: 20px 0;
}

.demo-article {
    border: 2px solid #cbd5e0;
    padding: 20px;
    margin: 10px 0;
    border-radius: 8px;
    background-color: #f7fafc;
}

.demo-article h2 {
    color: #2d3748;
    margin-top: 0;
}

.demo-article p {
    color: #4a5568;
    line-height: 1.6;
    background-color: #e6fffa;
    padding: 10px;
    border-radius: 4px;
    border-left: 4px solid #38b2ac;
}

.demo-content {
    background-color: #fff5f5;
    padding: 15px;
    border-radius: 6px;
    margin: 15px 0;
    border: 1px dashed #fc8181;
}

.demo-content p {
    background-color: #fed7e2;
    border-left-color: #e53e3e;
}

.demo-content ul {
    margin: 10px 0;
}

.demo-content li {
    margin: 5px 0;
    color: #2d3748;
}

.demo-content span {
    background-color: #fef5e7;
    padding: 4px 8px;
    border-radius: 4px;
    color: #c05621;
    font-weight: bold;
}

.selector-highlight {
    background-color: #yellow;
    animation: highlight 2s infinite;
}

@keyframes highlight {
    0%, 100% { background-color: transparent; }
    50% { background-color: #fef5e7; }
}