:root {
    --bg: #fbf8ea;
    --surface: #ffffff;
    --text: #1a1a1a;
    --heading: #0a0a0a;
    --muted: #6b6b6b;
    --link: #4a7c59;
    --link-hover: #2e5537;
    --border: #e4e0cd;
    --code-bg: #f0ecd8;
}

@media (prefers-color-scheme: dark) {
    :root {
        --bg: #1a1a1a;
        --surface: #262626;
        --text: #e5e5e5;
        --heading: #f5f5f5;
        --muted: #a3a3a3;
        --link: #8fbc9b;
        --link-hover: #b5d5be;
        --border: #333333;
        --code-bg: #2a2a2a;
    }
}

* {
    box-sizing: border-box;
}

html {
    -webkit-text-size-adjust: 100%;
}

body {
    font-family:
        -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen-Sans,
        Ubuntu, Cantarell, "Helvetica Neue", sans-serif;
    line-height: 1.65;
    color: var(--text);
    background: var(--bg);
    margin: 0;
    padding: 2rem 1.25rem;
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

main {
    max-width: 720px;
    margin: 0 auto;
    background: var(--surface);
    padding: 2.5rem 2rem;
    border-radius: 16px;
    border: 1px solid var(--border);
}

@media (max-width: 600px) {
    body {
        padding: 1rem 0.75rem;
    }
    main {
        padding: 1.75rem 1.25rem;
        border-radius: 12px;
    }
}

header {
    border-bottom: 1px solid var(--border);
    padding-bottom: 1.25rem;
    margin-bottom: 2rem;
}

header .brand {
    font-size: 0.85rem;
    font-weight: 600;
    letter-spacing: 0.08em;
    color: var(--muted);
    text-transform: uppercase;
    margin: 0 0 0.5rem;
}

h1 {
    color: var(--heading);
    font-size: 1.9rem;
    font-weight: 700;
    line-height: 1.25;
    margin: 0 0 0.75rem;
}

.meta {
    color: var(--muted);
    font-size: 0.9rem;
    margin: 0;
}

.meta strong {
    color: var(--text);
    font-weight: 600;
}

h2 {
    color: var(--heading);
    font-size: 1.35rem;
    font-weight: 700;
    margin: 2.25rem 0 0.75rem;
    line-height: 1.3;
}

h3 {
    color: var(--heading);
    font-size: 1.1rem;
    font-weight: 600;
    margin: 1.5rem 0 0.5rem;
}

p {
    margin: 0 0 1rem;
}

ul,
ol {
    margin: 0 0 1.25rem;
    padding-left: 1.5rem;
}

li {
    margin-bottom: 0.4rem;
}

li > ul,
li > ol {
    margin-top: 0.4rem;
    margin-bottom: 0.4rem;
}

a {
    color: var(--link);
    text-decoration: underline;
    text-underline-offset: 2px;
}

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

strong {
    color: var(--heading);
    font-weight: 600;
}

hr {
    border: none;
    border-top: 1px solid var(--border);
    margin: 2rem 0;
}

.placeholder {
    background: var(--code-bg);
    color: var(--muted);
    padding: 0.05em 0.35em;
    border-radius: 3px;
    font-family:
        ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas,
        "Liberation Mono", monospace;
    font-size: 0.9em;
}

footer {
    max-width: 720px;
    margin: 2rem auto 0;
    padding: 0 2rem;
    color: var(--muted);
    font-size: 0.85rem;
    text-align: center;
}

footer a {
    color: var(--muted);
    text-decoration: none;
    margin: 0 0.75rem;
}

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