/* Shared by every page except the homepage, which inlines the same tokens. */
:root {
    color-scheme: dark;
    --bg: #1c1c1e;
    --panel: #232326;
    --panel-raised: #28282c;
    --text: #f5f5f7;
    --text-2: #98989d;
    --text-3: #8e8e96;
    --hairline: rgba(255, 255, 255, 0.1);
    --hairline-strong: rgba(255, 255, 255, 0.18);
    --accent: #5b8cff;
    --accent-fill: #3d74f6;
    --accent-fill-hover: #4f81f8;
    --paper: #faf8f2;
    --selection: rgba(91, 140, 255, 0.3);
    --hover-wash: rgba(255, 255, 255, 0.06);
    --serif:
        "Iowan Old Style", Palatino, "Palatino Linotype", "Book Antiqua",
        Georgia, serif;
    --sans:
        -apple-system, BlinkMacSystemFont, "SF Pro Text", "Segoe UI", Roboto,
        "Helvetica Neue", Arial, sans-serif;
    --mono:
        ui-monospace, "SF Mono", "JetBrains Mono", Menlo, Consolas, monospace;
}
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}
html {
    scroll-behavior: smooth;
}
body {
    background: var(--bg);
    color: var(--text);
    font-family: var(--serif);
    line-height: 1.6;
}
::selection {
    background: var(--selection);
}
a {
    color: var(--accent);
    text-decoration: none;
}
a:hover {
    text-decoration: underline;
}
:focus-visible {
    outline: 2px solid var(--accent);
    outline-offset: 2px;
    border-radius: 2px;
}
.wrap {
    max-width: 880px;
    margin: 0 auto;
    padding: 0 24px;
}

/* top bar */
header {
    position: sticky;
    top: 0;
    z-index: 10;
    background: rgba(28, 28, 30, 0.82);
    backdrop-filter: blur(14px);
    -webkit-backdrop-filter: blur(14px);
    border-bottom: 1px solid var(--hairline);
}
.bar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 52px;
}
.brand {
    font-family: var(--sans);
    font-weight: 700;
    font-size: 17px;
    letter-spacing: -0.02em;
    color: var(--text);
}
.brand:hover {
    text-decoration: none;
}
.brand em {
    font-style: normal;
    color: var(--accent);
}
nav {
    display: flex;
    gap: 18px;
    align-items: center;
    font-family: var(--sans);
    font-size: 13.5px;
}
nav a {
    color: var(--text-2);
    white-space: nowrap;
}
nav a:hover,
nav a[aria-current="page"] {
    color: var(--text);
    text-decoration: none;
}
.nav-icon {
    display: inline-flex;
    align-items: center;
}
.nav-icon svg {
    display: block;
    fill: currentColor;
}
.btn {
    font-family: var(--sans);
    font-size: 13.5px;
    font-weight: 600;
    padding: 7px 14px;
    border-radius: 8px;
    border: 1px solid var(--hairline-strong);
    color: var(--text);
    background: transparent;
    cursor: pointer;
    display: inline-block;
}
.btn:hover {
    background: var(--hover-wash);
    text-decoration: none;
}
.btn--primary,
nav a.btn--primary {
    background: var(--accent-fill);
    border-color: transparent;
    color: var(--paper);
}
.btn--primary:hover {
    background: var(--accent-fill-hover);
}
@media (max-width: 560px) {
    .bar {
        padding: 0 16px;
    }
    nav {
        gap: 12px;
        font-size: 12.5px;
    }
    nav .btn {
        padding: 6px 10px;
        font-size: 12.5px;
    }
}
@media (max-width: 400px) {
    header nav .nav-opt {
        display: none;
    }
}

/* article */
.doc {
    padding-top: 40px;
}
.crumbs {
    font-family: var(--sans);
    font-size: 12.5px;
    color: var(--text-3);
}
.crumbs a {
    color: var(--text-2);
}
.doc h1 {
    font-size: clamp(30px, 5vw, 42px);
    font-weight: 600;
    letter-spacing: -0.015em;
    line-height: 1.15;
    margin: 14px 0 14px;
}
.lede {
    font-size: 18px;
    color: var(--text-2);
}
.checked {
    font-family: var(--sans);
    font-size: 12.5px;
    color: var(--text-3);
    margin-top: 14px;
}
.doc h2 {
    font-size: 26px;
    font-weight: 600;
    letter-spacing: -0.01em;
    line-height: 1.25;
    margin: 52px 0 14px;
    scroll-margin-top: 68px;
}
.doc h3 {
    font-family: var(--sans);
    font-size: 15.5px;
    font-weight: 600;
    margin: 28px 0 6px;
}
.doc p,
.doc li {
    font-size: 16px;
    color: var(--text-2);
}
.doc p {
    margin-bottom: 14px;
}
.doc ul,
.doc ol {
    margin: 0 0 14px 22px;
}
.doc li {
    margin-bottom: 6px;
}
.doc strong {
    color: var(--text);
    font-weight: 600;
}
.doc p a,
.doc li a,
.doc td a,
.checked a,
.colophon p a {
    text-decoration: underline;
    text-underline-offset: 2px;
}
.src {
    font-family: var(--sans);
    font-size: 12.5px;
    color: var(--text-3);
}
code {
    font-family: var(--mono);
    font-size: 0.88em;
    background: var(--panel-raised);
    border-radius: 4px;
    padding: 1px 5px;
    color: var(--text);
}
pre {
    background: #141416;
    border: 1px solid var(--hairline);
    border-radius: 10px;
    font-family: var(--mono);
    font-size: 13px;
    line-height: 1.6;
    padding: 16px 18px;
    overflow-x: auto;
    color: var(--text);
    margin-bottom: 14px;
}
pre code {
    background: none;
    padding: 0;
    font-size: inherit;
}
.table-scroll {
    overflow-x: auto;
    border: 1px solid var(--hairline);
    border-radius: 10px;
    margin-bottom: 14px;
}
table {
    border-collapse: collapse;
    width: 100%;
    font-family: var(--sans);
    font-size: 13.5px;
    line-height: 1.45;
}
th,
td {
    text-align: left;
    vertical-align: top;
    padding: 10px 12px;
    border-bottom: 1px solid var(--hairline);
    color: var(--text-2);
    min-width: 130px;
}
tr:last-child td {
    border-bottom: 0;
}
thead th {
    background: var(--panel);
    color: var(--text);
    font-weight: 600;
}
tbody th {
    color: var(--text);
    font-weight: 600;
}
.note {
    background: var(--panel);
    border: 1px solid var(--hairline);
    border-radius: 10px;
    padding: 14px 16px;
    margin-bottom: 14px;
}
.note p:last-child {
    margin-bottom: 0;
}
.demo-frame {
    border-radius: 10px;
    overflow: hidden;
    border: 1px solid var(--hairline);
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.4);
    background: var(--panel);
    margin: 20px 0 8px;
}
.demo-frame img,
.demo-frame video {
    display: block;
    width: 100%;
    height: auto;
}
.demo-caption {
    font-size: 14px;
    color: var(--text-2);
    text-align: center;
    margin-bottom: 14px;
}
.cta-row {
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
    margin: 22px 0 8px;
}
.related {
    list-style: none;
    margin-left: 0;
}

/* colophon */
footer {
    margin-top: 80px;
    border-top: 1px solid var(--hairline);
    padding: 36px 0 48px;
}
.colophon {
    text-align: center;
    font-size: 14px;
    color: var(--text-3);
    max-width: 44em;
    margin: 0 auto;
}
.colophon .mark {
    font-family: var(--sans);
    font-weight: 700;
    color: var(--text-2);
    letter-spacing: 0.02em;
}
.colophon .motto {
    font-style: italic;
}
.colophon p {
    margin-bottom: 10px;
}
.colophon nav {
    justify-content: center;
    flex-wrap: wrap;
    row-gap: 6px;
    margin-top: 14px;
}
@media (prefers-reduced-motion: reduce) {
    html {
        scroll-behavior: auto;
    }
}