:root {
    --bg: #fafafa;
    --text: #1f1f1f;
    --muted: #666;
    --border: #ddd;
    --link: #111;
    --body-text: #333;
}

@media (prefers-color-scheme: dark) {
    :root {
        --bg: #111;
        --text: #f5f5f5;
        --muted: #aaa;
        --border: #333;
        --link: #fff;
        --body-text: #ddd;
    }
}

* {
    box-sizing: border-box;
}

body {
    margin: 0;
    padding: 0;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Arial, sans-serif;
    line-height: 1.7;
    background-color: var(--bg);
    color: var(--text);
}

main {
    max-width: 760px;
    margin: 0 auto;
    padding: 4rem 1.5rem;
}

header {
    margin-bottom: 3rem;
}

h1, h2, h3 {
    margin: 0;
    font-weight: 600;
}

h1 {
    font-size: 2.4rem;
    margin-bottom: 0.5rem;
}

header h3 {
    font-size: 1rem;
    font-weight: 400;
    color: var(--muted);
}

section {
    margin-bottom: 2.5rem;
}

section h3 {
    font-size: 1rem;
    margin-bottom: 0.75rem;
}

p {
    margin: 0;
    color: var(--body-text);
}

i {
    font-style: normal;
}

ul {
    margin: 0;
    padding-left: 1.2rem;
}

li {
    margin-bottom: 0.75rem;
}

a {
    color: var(--link);
    text-decoration: underline;
    text-underline-offset: 3px;
}

a:hover {
    opacity: 0.7;
}

footer {
    margin-top: 4rem;
    padding-top: 2rem;
    border-top: 1px solid var(--border);
    font-size: 0.9rem;
    color: var(--muted);
}

@media (max-width: 768px) {
    main {
        padding: 2rem 1.25rem;
    }

    h1 {
        font-size: 2rem;
    }
}