:root {
    --bg-color: #fcfcfc;
    --text-color: #222222;
    --link-color: #0066cc;
    --link-hover: #004499;
    --border-color: #e0e0e0;
    --max-width: 680px;
}

/* Dark mode support */
@media (prefers-color-scheme: dark) {
    :root {
        --bg-color: #121212;
        --text-color: #e0e0e0;
        --link-color: #66b2ff;
        --link-hover: #99ccff;
        --border-color: #333333;
    }
}

body {
    background-color: var(--bg-color);
    color: var(--text-color);
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    line-height: 1.6;
    margin: 0;
    padding: 2rem 1rem;
}

main {
    max-width: var(--max-width);
    margin: 0 auto;
}

article {
    padding: 0 1rem;
}

header {
    margin-bottom: 2.5rem;
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 1rem;
}

h1 {
    font-size: 2rem;
    margin: 0;
    font-weight: 700;
    letter-spacing: -0.02em;
}

h2 {
    font-size: 1.4rem;
    margin-top: 2rem;
    margin-bottom: 0.8rem;
    font-weight: 600;
}

h3 {
    font-size: 1.15rem;
    margin-top: 1.5rem;
    margin-bottom: 0.6rem;
    font-weight: 600;
}

ul {
    list-style-type: square;
    padding-left: 1.25rem;
    margin-top: 0;
    margin-bottom: 1.5rem;
}

li {
    margin-bottom: 0.5rem;
}

a {
    color: var(--link-color);
    text-decoration: none;
    transition: color 0.15s ease;
}

a:hover {
    color: var(--link-hover);
    text-decoration: underline;
}

hr {
    border: 0;
    border-top: 1px solid var(--border-color);
    margin: 2.5rem 0;
}

footer {
    color: #888888;
    font-size: 0.85rem;
}