:root {
    --bg: #ffffff;
    --bg-soft: #f5f6f8;
    --text: #1d2129;
    --text-muted: #5b6270;
    --border: #e1e4ea;
    --accent: #3b5bdb;
    --code-bg: #f1f3f6;
}

@media (prefers-color-scheme: dark) {
    :root {
        --bg: #14161a;
        --bg-soft: #1b1e24;
        --text: #e6e8ec;
        --text-muted: #9aa1ad;
        --border: #2a2e36;
        --accent: #7c95f5;
        --code-bg: #1f232a;
    }
}

* {
    box-sizing: border-box;
}

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

body {
    margin: 0;
    background: var(--bg);
    color: var(--text);
    font: 16px/1.65 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}

a {
    color: var(--accent);
    text-decoration: none;
}

a:hover {
    text-decoration: underline;
}

header {
    border-bottom: 1px solid var(--border);
    background: var(--bg);
}

.bar {
    max-width: 960px;
    margin: 0 auto;
    padding: 14px 16px;
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 8px 24px;
}

.brand {
    color: var(--text);
    font-weight: 700;
    font-size: 18px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.brand img {
    width: 24px;
    height: 24px;
}

nav {
    display: flex;
    flex-wrap: wrap;
    gap: 4px 18px;
}

nav a {
    color: var(--text-muted);
    font-size: 15px;
}

nav a.active {
    color: var(--text);
    font-weight: 600;
}

main {
    max-width: 960px;
    margin: 0 auto;
    padding: 32px 16px 48px;
}

h1 {
    font-size: 32px;
    line-height: 1.25;
    margin: 0 0 12px;
}

h2 {
    font-size: 22px;
    margin: 40px 0 12px;
    padding-top: 8px;
}

h3 {
    font-size: 18px;
    margin: 28px 0 8px;
}

.lead {
    font-size: 18px;
    color: var(--text-muted);
    margin: 0 0 24px;
    max-width: 720px;
}

code {
    font-family: Consolas, "Cascadia Mono", Menlo, monospace;
    font-size: 0.92em;
    background: var(--code-bg);
    padding: 1px 5px;
    border-radius: 4px;
}

pre {
    background: var(--code-bg);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 14px 16px;
    overflow-x: auto;
}

pre code {
    background: none;
    padding: 0;
}

.cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 16px;
    margin: 24px 0;
}

.card {
    border: 1px solid var(--border);
    border-radius: 10px;
    padding: 18px;
    background: var(--bg-soft);
}

.card h3 {
    margin: 0 0 6px;
    font-size: 17px;
}

.card p {
    margin: 0;
    color: var(--text-muted);
    font-size: 15px;
}

.note {
    border-left: 3px solid var(--accent);
    background: var(--bg-soft);
    padding: 12px 16px;
    border-radius: 0 8px 8px 0;
    margin: 20px 0;
}

ul,
ol {
    padding-left: 22px;
}

li {
    margin: 4px 0;
}

dt {
    font-weight: 600;
    margin-top: 20px;
}

dd {
    margin: 6px 0 0;
    color: var(--text-muted);
}

footer {
    border-top: 1px solid var(--border);
    color: var(--text-muted);
    font-size: 14px;
}

footer .bar {
    justify-content: space-between;
}