/* Guide site styles. Mobile-first; the desktop layout starts at 900px. */

:root {
    color-scheme: light;
    --paper: #F2F4F3;
    --ink: #18202E;
    --slate: #566173;
    --rule: #D5DADF;
    --cobalt: #2D47C9;
    --cobalt-hover: #1E3399;
    --field: #101827;
    --aura: #F2D21B;
    --code-bg: #E4E8EB;
    --hl-keyword: #93A4FF;
    --hl-string: #EBCB6B;
    --hl-number: #FF8F87;
    --hl-title: #8FDB95;
    --hl-comment: #7A8496;
    --hl-plain: #E6E9EF;
    --hl-attr: #C9D1DE;
    --plate-rule: rgba(255, 255, 255, .08);
    --font-sans: 'Spline Sans', system-ui, -apple-system, 'Segoe UI', sans-serif;
    --font-mono: 'Spline Sans Mono', ui-monospace, Menlo, Consolas, monospace;
    --sidebar-width: 248px;
}

*, *::before, *::after {
    box-sizing: border-box;
}

body {
    margin: 0;
    background: var(--paper);
    color: var(--ink);
    font-family: var(--font-sans);
    font-size: 17px;
    line-height: 1.6;
    -webkit-text-size-adjust: 100%;
}

.skip {
    position: absolute;
    left: 12px;
    top: -100px;
    z-index: 100;
    padding: 8px 12px;
    border-radius: 6px;
    background: var(--ink);
    color: #fff;
    text-decoration: none;
}

.skip:focus {
    top: 12px;
}

:focus-visible {
    outline: 2px solid var(--cobalt);
    outline-offset: 2px;
}

/* ---------------------------------------------------------------------------
   Sidebar and navigation
   --------------------------------------------------------------------------- */

.sidebar {
    padding: 16px 20px 8px;
    border-bottom: 1px solid var(--rule);
    background: var(--paper);
}

.brand {
    display: inline-block;
    color: var(--ink);
    font-size: 1.1rem;
    font-weight: 700;
    letter-spacing: -.01em;
    text-decoration: none;
}

.version {
    margin-left: .3em;
    color: var(--slate);
    font-size: .85rem;
    font-weight: 400;
}

details.nav-toggle > summary {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-top: 12px;
    padding: 10px 0;
    border-top: 1px solid var(--rule);
    color: var(--ink);
    font-weight: 500;
    cursor: pointer;
    list-style: none;
}

details.nav-toggle > summary::-webkit-details-marker {
    display: none;
}

details.nav-toggle > summary::after {
    content: '';
    width: .5em;
    height: .5em;
    margin-right: .3em;
    border-right: 2px solid currentColor;
    border-bottom: 2px solid currentColor;
    transform: rotate(45deg);
}

details.nav-toggle[open] > summary::after {
    transform: rotate(-135deg);
}

details.nav-toggle > nav {
    padding-bottom: 12px;
}

.nav-pages,
.nav-extra {
    margin: 0;
    padding: 0;
    list-style: none;
}

.nav-pages > li {
    margin: 0;
    border-left: 3px solid transparent;
}

.nav-pages > li.current {
    border-left-color: var(--aura);
}

.nav-pages > li > a,
.nav-extra a {
    display: block;
    padding: 6px 0 6px 12px;
    color: var(--slate);
    font-weight: 500;
    text-decoration: none;
}

.nav-extra a {
    padding-left: 15px;
}

.nav-pages > li.current > a,
.nav-extra li.current a {
    color: var(--ink);
    font-weight: 600;
}

.nav-pages a:hover,
.nav-extra a:hover {
    color: var(--ink);
}

ol.toc {
    margin: 0 0 8px;
    padding: 0 0 0 24px;
    list-style: none;
    font-size: .9rem;
}

ol.toc a {
    display: block;
    padding: 3px 0;
    color: var(--slate);
    text-decoration: none;
}

ol.toc a:hover {
    color: var(--ink);
}

.nav-extra {
    margin-top: 16px;
    padding-top: 12px;
    border-top: 1px solid var(--rule);
}

/* ---------------------------------------------------------------------------
   Content and prose
   --------------------------------------------------------------------------- */

.content {
    min-width: 0;
    padding: 28px 20px 64px;
}

.content > * {
    max-width: 68ch;
}

.content h1 {
    margin: 0 0 .6rem;
    font-size: 2.6rem;
    font-weight: 700;
    line-height: 1.1;
    letter-spacing: -.02em;
}

.content h2 {
    margin: 3rem 0 .75rem;
    font-size: 1.55rem;
    font-weight: 600;
    line-height: 1.25;
    scroll-margin-top: 16px;
}

.content h3 {
    margin: 2rem 0 .5rem;
    font-size: 1.15rem;
    font-weight: 600;
    line-height: 1.3;
    scroll-margin-top: 16px;
}

.content p,
.content ul,
.content ol {
    margin: 0 0 1rem;
}

.content ul,
.content ol {
    padding-left: 1.4rem;
}

.content li {
    margin: .25rem 0;
}

.content a {
    color: var(--cobalt);
    text-decoration-thickness: 1px;
    text-underline-offset: .2em;
}

.content a:hover {
    color: var(--cobalt-hover);
}

.content code {
    padding: .1em .35em;
    border-radius: 4px;
    background: var(--code-bg);
    color: var(--ink);
    font-family: var(--font-mono);
    font-size: .88em;
}

/* Heading anchors: the heading text is the link. A slate # appears on hover. */
.content h2 .anchor,
.content h3 .anchor {
    position: relative;
    color: inherit;
    text-decoration: none;
}

.content .anchor::before {
    content: '#';
    position: absolute;
    left: -.85em;
    color: var(--slate);
    font-weight: 400;
    opacity: 0;
}

.content h2:hover .anchor::before,
.content h3:hover .anchor::before,
.content .anchor:focus-visible::before {
    opacity: 1;
}

/* Callouts: a quiet slate rule, with the lead word in ink. */
.content blockquote {
    margin: 1.5rem 0;
    padding: 0 0 0 18px;
    border-left: 3px solid var(--slate);
    color: var(--slate);
}

.content blockquote p {
    margin: 0;
}

.content blockquote strong {
    color: var(--ink);
    font-weight: 600;
}

/* Tables */
.table-wrap {
    max-width: 1080px;
    margin: 1.5rem 0;
    overflow-x: auto;
}

.content table {
    width: 100%;
    border-collapse: collapse;
    font-size: .95em;
}

.content th,
.content td {
    padding: 8px 16px 8px 0;
    border-bottom: 1px solid var(--rule);
    text-align: left;
    vertical-align: top;
}

.content th {
    color: var(--ink);
    font-weight: 600;
}

/* ---------------------------------------------------------------------------
   Code blocks outside plates
   --------------------------------------------------------------------------- */

.content pre {
    margin: 0;
    padding: 16px 18px;
    border-radius: 8px;
    overflow-x: auto;
    background: var(--field);
    color: var(--hl-plain);
    font-family: var(--font-mono);
    font-size: .88em;
    line-height: 1.55;
}

.content pre code {
    padding: 0;
    border-radius: 0;
    background: none;
    color: inherit;
    font-size: 1em;
}

.code-block {
    position: relative;
    max-width: 1080px;
    margin: 1.25rem 0;
}

.copy {
    position: absolute;
    top: 8px;
    right: 8px;
    padding: 6px 9px;
    border: 1px solid rgba(255, 255, 255, .14);
    border-radius: 6px;
    background: rgba(255, 255, 255, .08);
    color: var(--hl-attr);
    font: 500 12px/1 var(--font-sans);
    cursor: pointer;
    transition: background-color .15s, color .15s;
}

.copy:hover {
    background: rgba(255, 255, 255, .16);
    color: #fff;
}

/* ---------------------------------------------------------------------------
   Plates: live examples
   --------------------------------------------------------------------------- */

.plate {
    display: grid;
    grid-template-columns: minmax(0, 55fr) minmax(0, 45fr);
    max-width: 1080px;
    margin: 2rem 0;
    overflow: hidden;
    border-radius: 10px;
    background: var(--field);
    color: var(--hl-plain);
}

.plate-view {
    position: relative;
    grid-column: 1;
    grid-row: 1;
    height: 420px;
    min-width: 0;
}

.viewer {
    position: absolute;
    inset: 0;
}

.plate-rerun {
    position: absolute;
    right: 12px;
    bottom: 12px;
    z-index: 2;
    padding: 7px 10px;
    border: 1px solid rgba(255, 255, 255, .2);
    border-radius: 6px;
    background: rgba(16, 24, 39, .5);
    color: var(--hl-plain);
    font: 500 12px/1 var(--font-sans);
    cursor: pointer;
    transition: background-color .15s, border-color .15s;
}

.plate-rerun:hover,
.plate-rerun:focus-visible {
    border-color: rgba(255, 255, 255, .4);
    background: rgba(16, 24, 39, .92);
}

.plate-code {
    grid-column: 2;
    grid-row: 1;
    max-height: 420px;
    min-width: 0;
    padding: 18px 20px;
    overflow: auto;
    border-left: 1px solid var(--plate-rule);
}

.plate-code pre {
    margin: 0;
    padding: 0;
    overflow: visible;
    background: none;
    color: var(--hl-plain);
    font-size: 13.5px;
    line-height: 1.55;
}

.plate-log {
    display: block;
    grid-column: 1 / -1;
    grid-row: 2;
    max-height: 180px;
    margin: 0;
    padding: 10px 20px;
    overflow: auto;
    border-top: 1px solid var(--plate-rule);
    color: var(--hl-attr);
    font: 13px/1.5 var(--font-mono);
    white-space: pre-wrap;
}

.plate-log[hidden] {
    display: none;
}

.plate-log .err {
    color: var(--hl-number);
}

/* Home page hero: a full-width plate with the title overlaid bottom-left. */
.plate-hero {
    grid-template-columns: minmax(0, 1fr);
}

.plate-hero .plate-view {
    height: 520px;
}

.page-index .plate-hero {
    margin-top: 0;
}

.hero-caption {
    position: absolute;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 1;
    max-width: none;
    padding: 96px 36px 36px;
    background: linear-gradient(to top, rgba(16, 24, 39, .88) 0%, rgba(16, 24, 39, .55) 50%, rgba(16, 24, 39, 0) 100%);
    color: #fff;
    pointer-events: none;
}

.hero-caption h1 {
    max-width: 22ch;
    margin: 0 0 .6rem;
    color: #fff;
}

.hero-caption p {
    max-width: 36rem;
    margin: 0;
    color: var(--hl-plain);
    font-size: 1.05rem;
}

/* Syntax colours, for dark code blocks and plates. */
pre .hljs-keyword,
pre .hljs-selector-tag,
pre .hljs-built_in,
pre .hljs-meta,
pre .hljs-tag,
pre .hljs-name {
    color: var(--hl-keyword);
}

pre .hljs-string,
pre .hljs-regexp {
    color: var(--hl-string);
}

pre .hljs-number,
pre .hljs-literal {
    color: var(--hl-number);
}

pre .hljs-title,
pre .hljs-title.function_ {
    color: var(--hl-title);
}

pre .hljs-comment {
    color: var(--hl-comment);
}

pre .hljs-attr,
pre .hljs-attribute,
pre .hljs-property {
    color: var(--hl-attr);
}

pre .hljs-params,
pre .hljs-variable {
    color: var(--hl-plain);
}

/* Focus rings on the dark plate need a lighter tone to stay visible. */
.plate :focus-visible,
.code-block :focus-visible {
    outline-color: var(--hl-keyword);
}

/* ---------------------------------------------------------------------------
   Desktop: sidebar beside the content
   --------------------------------------------------------------------------- */

@media (min-width: 900px) {
    .layout {
        display: grid;
        grid-template-columns: var(--sidebar-width) minmax(0, 1fr);
        min-height: 100vh;
    }

    .sidebar {
        position: sticky;
        top: 0;
        height: 100vh;
        overflow-y: auto;
        padding: 28px 22px 40px 24px;
        border-right: 1px solid var(--rule);
        border-bottom: 0;
    }

    .brand {
        display: block;
        margin-bottom: 20px;
    }

    .version {
        display: block;
        margin: 2px 0 0;
    }

    details.nav-toggle > summary {
        display: none;
    }

    details.nav-toggle > nav {
        padding-bottom: 0;
    }

    .content {
        padding: 56px 4rem 96px;
    }

    .plate-view {
        grid-column: 1;
        grid-row: 1;
    }

    .plate-code {
        grid-column: 2;
        grid-row: 1;
    }
}

/* Mobile: the plate stacks, the viewer is shorter, and the code follows. */
@media (max-width: 899px) {
    .plate {
        grid-template-columns: minmax(0, 1fr);
    }

    .plate-view {
        grid-column: 1;
        grid-row: 1;
        height: 340px;
    }

    .plate-code {
        grid-column: 1;
        grid-row: 2;
        max-height: none;
        border-left: 0;
        border-top: 1px solid var(--plate-rule);
    }

    .plate-log {
        grid-row: 3;
    }

    .plate-hero .plate-view {
        height: 380px;
    }

    .hero-caption {
        padding: 72px 20px 24px;
    }

    .hero-caption h1 {
        font-size: 2.1rem;
    }
}

@media (prefers-reduced-motion: reduce) {
    .copy,
    .plate-rerun {
        transition: none;
    }
}