:root {
    --color-bg: #ffffff;
    --color-fg: #0a1c33;
    --color-muted: #5a6b80;
    --color-accent: #0176d3;
    --color-accent-hover: #014486;
    --color-border: #e2e6ec;
    --color-code-bg: #f4f6f9;
    --max-width: 880px;
    --font-stack: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    --font-mono: ui-monospace, SFMono-Regular, "SF Mono", Consolas, "Liberation Mono", Menlo, monospace;
}

* {
    box-sizing: border-box;
}

html, body {
    margin: 0;
    padding: 0;
    background: var(--color-bg);
    color: var(--color-fg);
    font-family: var(--font-stack);
    font-size: 16px;
    line-height: 1.55;
}

header {
    border-bottom: 1px solid var(--color-border);
    background: #ffffff;
}

.top-nav {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 16px 24px;
    display: flex;
    align-items: baseline;
    justify-content: space-between;
}

.top-nav .logo {
    font-weight: 600;
    font-size: 18px;
    color: var(--color-fg);
    text-decoration: none;
}

.top-nav-links a {
    color: var(--color-muted);
    text-decoration: none;
    margin-left: 20px;
    font-size: 14px;
}

.top-nav-links a:hover,
.top-nav-links a.active {
    color: var(--color-accent);
}

main.page {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 32px 24px 96px;
}

h1, h2, h3 {
    line-height: 1.25;
    margin-top: 1.6em;
    margin-bottom: 0.4em;
}

h1 {
    font-size: 32px;
    margin-top: 0.4em;
}

h2 {
    font-size: 22px;
    border-bottom: 1px solid var(--color-border);
    padding-bottom: 4px;
}

h3 {
    font-size: 16px;
    color: var(--color-muted);
    text-transform: uppercase;
    letter-spacing: 0.04em;
    margin-top: 1.2em;
    margin-bottom: 0.2em;
}

p, ul, ol, table {
    margin: 0 0 1em;
}

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

code {
    font-family: var(--font-mono);
    font-size: 0.92em;
    background: var(--color-code-bg);
    padding: 1px 5px;
    border-radius: 4px;
}

pre {
    background: var(--color-code-bg);
    border: 1px solid var(--color-border);
    border-radius: 6px;
    padding: 12px 14px;
    overflow-x: auto;
    margin: 0 0 1em;
}

pre code {
    background: transparent;
    padding: 0;
    border-radius: 0;
    font-size: 0.88em;
}

table {
    border-collapse: collapse;
    width: 100%;
}

th, td {
    text-align: left;
    padding: 8px 12px;
    border-bottom: 1px solid var(--color-border);
    vertical-align: top;
}

th {
    background: var(--color-code-bg);
    font-weight: 600;
}

.lede {
    font-size: 19px;
    color: var(--color-muted);
}

.hero {
    margin-top: 16px;
}

footer {
    border-top: 1px solid var(--color-border);
    color: var(--color-muted);
    font-size: 13px;
    text-align: center;
    padding: 20px 24px;
}