/* Tokens: the devboard's palette and scale (builder/web/static/style.css). See DESIGN.md#style */
:root {
  --bg: #0b1020; --panel: #121a2b; --panel-2: #182236; --panel-3: #1f2b44; --line: #223049; --line-2: #2d3d5c;
  --fg: #e6eaf2; --fg-2: #c3cad8; --muted: #8a94a8;
  --accent: #f59e0b; --accent-fg: #ffd27a; --accent-soft: rgba(245, 158, 11, .14);
  --code-bg: #0f1626;
  --mono: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  --sans: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  --sp-1: .25rem; --sp-2: .5rem; --sp-3: .75rem; --sp-4: 1rem; --sp-5: 1.5rem;
  --radius: 8px; --radius-sm: 5px; --topbar: 48px; --sidebar: 240px;
}

/* Base */
* { box-sizing: border-box; }
html { background: var(--bg); }
body { margin: 0; min-height: 100vh; color: var(--fg); font: 15px/1.6 var(--sans); display: grid; grid-template-columns: var(--sidebar) minmax(0, 1fr); grid-template-rows: var(--topbar) 1fr; }
a { color: var(--accent-fg); text-decoration: none; }
a:hover { text-decoration: underline; }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; border-radius: 2px; }
.icon { width: 20px; height: 20px; flex: none; color: var(--accent); }

/* Top bar */
.topbar { grid-column: 1 / -1; position: sticky; top: 0; z-index: 3; display: flex; align-items: center; gap: var(--sp-3); height: var(--topbar); padding: 0 var(--sp-4); background: var(--panel); border-bottom: 1px solid var(--line); }
.brand { display: inline-flex; align-items: center; gap: var(--sp-2); font-weight: 700; font-size: 15px; color: var(--fg); }
.brand:hover { text-decoration: none; color: var(--accent-fg); }
.brand .section { padding-left: var(--sp-2); border-left: 1px solid var(--line-2); color: var(--muted); font-weight: 500; }
.topspace { flex: 1; }
.toplink { color: var(--fg-2); font-size: 13px; padding: .2rem .65rem; border: 1px solid var(--line-2); border-radius: 999px; white-space: nowrap; }
.toplink:hover { color: var(--fg); border-color: var(--muted); text-decoration: none; }

/* Sidebar */
.sidebar { position: sticky; top: var(--topbar); align-self: start; height: calc(100vh - var(--topbar)); overflow-y: auto; display: flex; flex-direction: column; gap: 2px; padding: var(--sp-4) var(--sp-3); background: var(--panel); border-right: 1px solid var(--line); font-size: 14px; }
.navlabel { padding: var(--sp-1) var(--sp-2); font-size: 11px; font-weight: 600; text-transform: uppercase; letter-spacing: .08em; color: var(--muted); }
.navlink { padding: .4rem var(--sp-2); border-radius: var(--radius-sm); color: var(--fg-2); border-left: 2px solid transparent; }
.navlink:hover { background: var(--panel-2); color: var(--fg); text-decoration: none; }
.navlink[aria-current="page"] { background: var(--accent-soft); color: var(--accent-fg); border-left-color: var(--accent); font-weight: 600; }
.navsections { display: flex; flex-direction: column; margin: 2px 0 var(--sp-2) var(--sp-4); padding-left: var(--sp-2); border-left: 1px solid var(--line); }
.navsections a { padding: .2rem var(--sp-2); color: var(--muted); font-size: 13px; }
.navsections a:hover { color: var(--fg); text-decoration: none; }

/* Content: the GitHub Markdown look on the devboard palette. See DESIGN.md#style */
main { min-width: 0; padding: var(--sp-5) 2.5rem 4rem; }
.markdown-body { max-width: 860px; overflow-wrap: break-word; }
.markdown-body > :first-child { margin-top: 0; }
.markdown-body h1, .markdown-body h2, .markdown-body h3, .markdown-body h4 { margin: 1.6em 0 .6em; font-weight: 600; line-height: 1.25; scroll-margin-top: calc(var(--topbar) + var(--sp-3)); }
.markdown-body h1 { font-size: 2em; padding-bottom: .3em; border-bottom: 1px solid var(--line); }
.markdown-body h2 { font-size: 1.5em; padding-bottom: .3em; border-bottom: 1px solid var(--line); }
.markdown-body h3 { font-size: 1.2em; }
.markdown-body h4 { font-size: 1em; }
.markdown-body p, .markdown-body ul, .markdown-body ol, .markdown-body table, .markdown-body pre, .markdown-body blockquote { margin: 0 0 1em; }
.markdown-body ul, .markdown-body ol { padding-left: 2em; }
.markdown-body li + li { margin-top: .25em; }
.markdown-body strong { font-weight: 600; }
.markdown-body hr { height: 1px; margin: 1.5em 0; border: 0; background: var(--line); }
.markdown-body blockquote { padding: .5em 1em; color: var(--fg-2); border-left: 3px solid var(--accent); background: var(--accent-soft); border-radius: 0 var(--radius-sm) var(--radius-sm) 0; }
.markdown-body blockquote > :last-child { margin-bottom: 0; }
.markdown-body code { padding: .15em .4em; font: 85%/1.4 var(--mono); background: var(--panel-3); border-radius: var(--radius-sm); }
.markdown-body pre { position: relative; padding: var(--sp-4); overflow: auto; font: 13px/1.5 var(--mono); background: var(--code-bg); border: 1px solid var(--line); border-radius: var(--radius); }
.markdown-body pre code { padding: 0; font: inherit; background: none; white-space: pre; }
.markdown-body pre:has(code[class^="language-"]) { padding-top: 2.1rem; }
.markdown-body pre code[class^="language-"]::before { position: absolute; top: .5rem; left: var(--sp-4); font: 600 11px var(--sans); letter-spacing: .08em; text-transform: uppercase; color: var(--muted); }
.markdown-body code.language-sh::before, .markdown-body code.language-bash::before { content: "shell"; }
.markdown-body code.language-go::before { content: "Go"; }
.markdown-body code.language-rust::before { content: "Rust"; }
.markdown-body code.language-python::before { content: "Python"; }
.markdown-body code.language-js::before, .markdown-body code.language-javascript::before { content: "JavaScript"; }
.markdown-body code.language-json::before { content: "JSON"; }
.markdown-body code.language-toml::before { content: "Cargo.toml"; }
.markdown-body table { display: block; width: max-content; max-width: 100%; overflow: auto; border-collapse: collapse; font-size: 14px; }
.markdown-body th, .markdown-body td { padding: .4rem .8rem; border: 1px solid var(--line-2); text-align: left; vertical-align: top; }
.markdown-body th { font-weight: 600; background: var(--panel-2); }
.markdown-body tr:nth-child(even) td { background: rgba(255, 255, 255, .02); }

/* Narrow screens: the sidebar becomes a row of pages under the top bar. */
@media (max-width: 860px) {
  body { grid-template-columns: minmax(0, 1fr); grid-template-rows: var(--topbar) auto 1fr; }
  .sidebar { position: sticky; z-index: 2; height: auto; flex-direction: row; align-items: center; overflow-x: auto; padding: var(--sp-2) var(--sp-3); border-right: none; border-bottom: 1px solid var(--line); }
  .navlabel, .navsections { display: none; }
  .navlink { flex: none; border-left: none; border-bottom: 2px solid transparent; border-radius: 0; }
  .navlink[aria-current="page"] { background: none; border-bottom-color: var(--accent); }
  main { padding: var(--sp-4) var(--sp-4) 3rem; }
  .markdown-body h1 { font-size: 1.6em; }
  .markdown-body h1, .markdown-body h2, .markdown-body h3 { scroll-margin-top: calc(var(--topbar) + 3rem); }
}