* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: #ffffff;
}

header {
    background-color: #cc0000;
    color: #ffffff;
    padding: 2rem 1rem;
    text-align: center;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

header h1 {
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 1rem;
}

article {
    background-color: #fff;
    padding: 2rem;
    margin: 2rem 0;
    border-radius: 8px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.05);
}

article h2, article h3, article h4 {
    color: #cc0000;
    margin-top: 1.5rem;
    margin-bottom: 1rem;
}

article h2 {
    font-size: 1.75rem;
    border-bottom: 2px solid #cc0000;
    padding-bottom: 0.5rem;
}

article h3 {
    font-size: 1.4rem;
}

article h4 {
    font-size: 1.2rem;
}

article p {
    margin-bottom: 1rem;
    text-align: justify;
}

article ul, article ol {
    margin-left: 2rem;
    margin-bottom: 1rem;
}

article li {
    margin-bottom: 0.5rem;
}

.transition-section {
    background-color: #ffffcc;
    padding: 2rem;
    margin: 2rem 0;
    border-radius: 8px;
    border: 2px solid #cc0000;
}

.transition-section p {
    margin-bottom: 1rem;
}

.links-section {
    background-color: #fffbf0;
    padding: 2rem;
    margin: 2rem 0;
    border-radius: 8px;
    border: 2px solid #cc0000;
}

.links-section h2 {
    color: #cc0000;
    font-size: 1.75rem;
    margin-bottom: 1.5rem;
    text-align: center;
    border-bottom: 2px solid #cc0000;
    padding-bottom: 0.5rem;
}

.links-section h3 {
    color: #cc0000;
    font-size: 1.3rem;
    margin-top: 2rem;
    margin-bottom: 1rem;
    padding: 0.5rem;
    background-color: #ffffff;
    border-left: 4px solid #cc0000;
}

.links-section ul {
    list-style: none;
    column-count: 2;
    column-gap: 2rem;
    margin-bottom: 2rem;
}

.links-section li {
    break-inside: avoid;
    margin-bottom: 0.75rem;
    padding-left: 1.5rem;
    position: relative;
}

.links-section li:before {
    content: "▸";
    color: #cc0000;
    position: absolute;
    left: 0;
    font-weight: bold;
}

.links-section a {
    color: #0066cc;
    text-decoration: none;
    transition: color 0.3s ease;
}

.links-section a:hover {
    color: #cc0000;
    text-decoration: underline;
}

footer {
    background-color: #f5f5f5;
    padding: 2rem 1rem;
    text-align: center;
    margin-top: 3rem;
    border-top: 3px solid #cc0000;
}

footer p {
    color: #666;
    font-size: 0.9rem;
}

hr {
    border: none;
    border-top: 1px solid #ddd;
    margin: 2rem 0;
}

@media (max-width: 768px) {
    header h1 {
        font-size: 1.5rem;
    }

    article {
        padding: 1.5rem;
    }

    .transition-section {
        padding: 1.5rem;
    }

    .links-section {
        padding: 1.5rem;
    }

    .links-section ul {
        column-count: 1;
    }

    .links-section h3 {
        font-size: 1.1rem;
    }
}

@media (max-width: 480px) {
    header {
        padding: 1.5rem 0.5rem;
    }

    header h1 {
        font-size: 1.25rem;
    }

    article {
        padding: 1rem;
    }

    .container {
        padding: 0.5rem;
    }

    .transition-section {
        padding: 1rem;
    }

    .links-section {
        padding: 1rem;
    }
}