/* xeer.run — one stylesheet, no imports, no web fonts. Light and dark both come from `prefers-color-scheme`; `[data-theme]` on overrides it when a reader has chosen explicitly, so the toggle wins in both directions. */ :root { --ink: #17161c; --ink-soft: #5c5a68; --ink-faint: #86838f; --page: #fbfaf8; --panel: #ffffff; --line: #e3e0da; --line-soft: #eeebe5; --accent: #b4380f; --accent-soft: #fdf1ec; --code-page: #f6f4f0; --shadow: 0 1px 2px rgba(23, 22, 28, .05), 0 8px 24px -16px rgba(23, 22, 28, .18); --tok-keyword: #9b2d76; --tok-string: #1f6b40; --tok-number: #8a4a05; --tok-comment: #83808c; --tok-name: #1b4f96; --tok-type: #7a4bb8; --measure: 46rem; --sans: ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif; --mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, "Liberation Mono", monospace; color-scheme: light; } @media (prefers-color-scheme: dark) { :root:not([data-theme="light"]) { color-scheme: dark; } } :root[data-theme="dark"], :root:not([data-theme="light"]) { /* Overridden back below for light; kept together so the dark palette reads as one block. */ } @media (prefers-color-scheme: dark) { :root:not([data-theme="light"]) { --ink: #eceaf2; --ink-soft: #a7a4b2; --ink-faint: #837f8e; --page: #121116; --panel: #1a1920; --line: #2e2c36; --line-soft: #24232b; --accent: #ff8a5c; --accent-soft: #2a1a13; --code-page: #1c1b22; --shadow: 0 1px 2px rgba(0, 0, 0, .4), 0 8px 24px -16px rgba(0, 0, 0, .7); --tok-keyword: #f19cd4; --tok-string: #86d9a5; --tok-number: #f0b678; --tok-comment: #857f92; --tok-name: #85bdf7; --tok-type: #c6a6f5; } } :root[data-theme="dark"] { color-scheme: dark; --ink: #eceaf2; --ink-soft: #a7a4b2; --ink-faint: #837f8e; --page: #121116; --panel: #1a1920; --line: #2e2c36; --line-soft: #24232b; --accent: #ff8a5c; --accent-soft: #2a1a13; --code-page: #1c1b22; --shadow: 0 1px 2px rgba(0, 0, 0, .4), 0 8px 24px -16px rgba(0, 0, 0, .7); --tok-keyword: #f19cd4; --tok-string: #86d9a5; --tok-number: #f0b678; --tok-comment: #857f92; --tok-name: #85bdf7; --tok-type: #c6a6f5; } *, *::before, *::after { box-sizing: border-box; } html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; } @media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } } body { margin: 0; background: var(--page); color: var(--ink); font-family: var(--sans); font-size: 1rem; line-height: 1.65; /* An anchored heading should not land underneath the sticky masthead. */ scroll-padding-top: 5rem; } a { color: var(--accent); text-decoration-thickness: 1px; text-underline-offset: .18em; } a:hover { text-decoration-thickness: 2px; } .skip { position: absolute; left: -9999px; padding: .6rem 1rem; background: var(--panel); border: 1px solid var(--line); border-radius: .4rem; } .skip:focus { left: 1rem; top: 1rem; z-index: 20; } :focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; border-radius: .2rem; } /* ---------- masthead ---------- */ .masthead { position: sticky; top: 0; z-index: 10; display: flex; align-items: center; gap: 1rem; padding: .7rem clamp(1rem, 4vw, 2.5rem); background: color-mix(in srgb, var(--page) 88%, transparent); backdrop-filter: blur(10px); border-bottom: 1px solid var(--line); } .brand { display: inline-flex; align-items: center; gap: .5rem; color: var(--ink); text-decoration: none; font-weight: 640; font-size: 1.05rem; letter-spacing: -.01em; } .brand .logo { width: 1.15rem; height: 1.15rem; color: var(--accent); } .masthead-links { margin-left: auto; display: flex; align-items: center; gap: clamp(.6rem, 2vw, 1.4rem); } .masthead-links a { color: var(--ink-soft); text-decoration: none; font-size: .92rem; } .masthead-links a:hover { color: var(--ink); } .theme, .menu { border: 1px solid var(--line); border-radius: .4rem; background: var(--panel); color: var(--ink-soft); font: inherit; font-size: .85rem; padding: .25rem .5rem; cursor: pointer; } .theme { line-height: 1; padding: .3rem .45rem; } .theme:hover, .menu:hover { color: var(--ink); } .menu { display: none; } /* ---------- shell ---------- */ .shell { display: grid; grid-template-columns: 15rem minmax(0, 1fr) 13rem; gap: clamp(1.5rem, 4vw, 3.5rem); max-width: 84rem; margin: 0 auto; padding: 2.5rem clamp(1rem, 4vw, 2.5rem) 4rem; } .shell-home { display: block; max-width: 74rem; padding-top: 0; } main { min-width: 0; } /* ---------- sidebar and toc ---------- */ .sidebar, .toc { position: sticky; top: 4.5rem; align-self: start; max-height: calc(100vh - 6rem); overflow-y: auto; font-size: .92rem; } .sidebar ul, .toc ul { list-style: none; margin: 0 0 1.4rem; padding: 0; } .sidebar li, .toc li { margin: 0; } .nav-title { margin: 0 0 .45rem; font-size: .72rem; font-weight: 680; letter-spacing: .1em; text-transform: uppercase; color: var(--ink-faint); } .sidebar a, .toc a { display: block; padding: .26rem .6rem; margin-left: -.6rem; color: var(--ink-soft); text-decoration: none; border-radius: .35rem; } .sidebar a:hover, .toc a:hover { color: var(--ink); background: var(--line-soft); } .sidebar a[aria-current="page"] { color: var(--accent); background: var(--accent-soft); font-weight: 560; } .toc { border-left: 1px solid var(--line); padding-left: 1rem; } .toc .depth-3 a { padding-left: 1.2rem; font-size: .88rem; } /* A heading that is a code span becomes a navigation label here, not a code chip. */ .sidebar code, .toc code { padding: 0; border: 0; background: none; font-size: .95em; white-space: normal; } /* ---------- prose ---------- */ main h1 { margin: 0 0 .6rem; font-size: clamp(2rem, 4.4vw, 2.7rem); line-height: 1.1; letter-spacing: -.025em; font-weight: 660; } main h2 { margin: 3rem 0 .8rem; font-size: 1.45rem; line-height: 1.25; letter-spacing: -.015em; font-weight: 640; padding-top: .6rem; border-top: 1px solid var(--line-soft); } main h3 { margin: 2.1rem 0 .6rem; font-size: 1.12rem; font-weight: 640; letter-spacing: -.01em; } main h4 { margin: 1.6rem 0 .5rem; font-size: 1rem; font-weight: 640; } main h2 .anchor, main h3 .anchor { float: left; margin-left: -1.1rem; width: 1.1rem; color: var(--ink-faint); text-decoration: none; opacity: 0; font-weight: 400; } main h2:hover .anchor, main h3:hover .anchor, .anchor:focus { opacity: 1; } main p, main ul, main ol, main blockquote, main .table-scroll, main figure.code, main dl { max-width: var(--measure); } main p, main ul, main ol { margin: 0 0 1.1rem; } main li { margin: 0 0 .35rem; } main ul, main ol { padding-left: 1.4rem; } main li > ul, main li > ol { margin-top: .35rem; } main strong { font-weight: 640; } blockquote { margin: 1.4rem 0; padding: .1rem 0 .1rem 1.1rem; border-left: 3px solid var(--accent); color: var(--ink-soft); } blockquote p:last-child { margin-bottom: 0; } hr { margin: 3rem 0; border: 0; border-top: 1px solid var(--line); } /* ---------- code ---------- */ code { font-family: var(--mono); font-size: .875em; } :not(pre) > code { padding: .12em .34em; border-radius: .3rem; background: var(--code-page); border: 1px solid var(--line-soft); white-space: nowrap; } figure.code { position: relative; margin: 1.4rem 0; background: var(--code-page); border: 1px solid var(--line); border-radius: .6rem; box-shadow: var(--shadow); } figure.code figcaption { padding: .4rem .85rem; border-bottom: 1px solid var(--line); font-size: .72rem; font-weight: 620; letter-spacing: .08em; text-transform: uppercase; color: var(--ink-faint); } figure.code pre { margin: 0; padding: .9rem 1rem; overflow-x: auto; font-family: var(--mono); font-size: .855rem; line-height: 1.62; tab-size: 2; } figure.code pre code { font-size: inherit; background: none; border: 0; padding: 0; white-space: pre; } .copy { position: absolute; top: .4rem; right: .5rem; padding: .2rem .5rem; border: 1px solid var(--line); border-radius: .35rem; background: var(--panel); color: var(--ink-soft); font: inherit; font-size: .72rem; cursor: pointer; opacity: 0; transition: opacity .12s; } figure.code:hover .copy, .copy:focus-visible { opacity: 1; } .copy:hover { color: var(--ink); } .copy[data-copied] { color: var(--tok-string); border-color: currentColor; opacity: 1; } .hljs-keyword, .hljs-literal, .hljs-built_in, .hljs-selector-tag { color: var(--tok-keyword); } .hljs-string, .hljs-regexp, .hljs-addition, .hljs-attr, .hljs-attribute { color: var(--tok-string); } .hljs-number, .hljs-symbol, .hljs-meta { color: var(--tok-number); } .hljs-comment, .hljs-quote { color: var(--tok-comment); font-style: italic; } .hljs-title, .hljs-title.function_, .hljs-section, .hljs-name, .hljs-variable { color: var(--tok-name); } .hljs-type, .hljs-class .hljs-title, .hljs-title.class_, .hljs-params { color: var(--tok-type); } .hljs-deletion { color: var(--accent); } .hljs-property, .hljs-punctuation { color: inherit; } /* ---------- tables ---------- */ .table-scroll { overflow-x: auto; margin: 1.4rem 0; max-width: 100%; } table { border-collapse: collapse; width: 100%; font-size: .9rem; } th, td { text-align: left; vertical-align: top; padding: .5rem .8rem; border-bottom: 1px solid var(--line-soft); } th { font-weight: 640; color: var(--ink); border-bottom: 1px solid var(--line); white-space: nowrap; } td code { white-space: nowrap; } /* ---------- landing page ---------- */ .hero { padding: clamp(3rem, 9vw, 6rem) 0 2rem; } .hero .eyebrow { margin: 0 0 1rem; font-size: .75rem; font-weight: 640; letter-spacing: .11em; text-transform: uppercase; color: var(--accent); } .hero h1 { margin: 0 0 1.1rem; max-width: 30ch; font-size: clamp(2.4rem, 6.4vw, 4.1rem); line-height: 1.03; letter-spacing: -.035em; font-weight: 680; } .hero .lede { max-width: 40rem; font-size: clamp(1.05rem, 2.2vw, 1.28rem); color: var(--ink-soft); } .hero .lede strong { color: var(--ink); font-weight: 600; } .cta { display: flex; flex-wrap: wrap; gap: .7rem; margin: 2rem 0 0; } .cta a { display: inline-block; padding: .62rem 1.15rem; border-radius: .45rem; text-decoration: none; font-weight: 560; font-size: .96rem; border: 1px solid transparent; } .cta a.primary { background: var(--ink); color: var(--page); } .cta a.primary:hover { background: var(--accent); } .cta a.secondary { border-color: var(--line); color: var(--ink); background: var(--panel); } .cta a.secondary:hover { border-color: var(--ink-faint); } .home main > h2 { max-width: none; margin-top: 4rem; border-top: 0; padding-top: 0; font-size: clamp(1.5rem, 3vw, 1.9rem); letter-spacing: -.02em; } .home main > p, .home main > ul, .home main > ol { max-width: var(--measure); } .grid { display: grid; gap: 1rem; margin: 1.5rem 0 0; grid-template-columns: repeat(auto-fit, minmax(15rem, 1fr)); } .grid .card { padding: 1.1rem 1.2rem; background: var(--panel); border: 1px solid var(--line); border-radius: .6rem; box-shadow: var(--shadow); } .grid .card h3 { margin: 0 0 .4rem; font-size: 1rem; } .grid .card p { margin: 0; font-size: .93rem; color: var(--ink-soft); } .grid .card p + p { margin-top: .5rem; } .grid .card a { font-weight: 560; } .split { display: grid; gap: clamp(1.5rem, 4vw, 3rem); grid-template-columns: repeat(auto-fit, minmax(20rem, 1fr)); align-items: start; } .split > div { min-width: 0; } .split h3 { margin-top: 0; } .split figure.code { max-width: none; } .note { margin: 2rem 0; padding: 1rem 1.2rem; max-width: var(--measure); background: var(--panel); border: 1px solid var(--line); border-left: 3px solid var(--accent); border-radius: .5rem; font-size: .95rem; } .note p { margin: 0; } .note p + p { margin-top: .6rem; } .note strong { color: var(--ink); } /* ---------- footer ---------- */ .footer { border-top: 1px solid var(--line); padding: 2rem clamp(1rem, 4vw, 2.5rem) 3rem; color: var(--ink-faint); font-size: .9rem; } .footer p { max-width: 84rem; margin: 0 auto .3rem; } .footer a { color: var(--ink-soft); } /* ---------- narrow ---------- */ @media (max-width: 60rem) { .shell { grid-template-columns: minmax(0, 1fr); padding-top: 1.5rem; } .toc { display: none; } .menu { display: inline-block; order: 3; } .masthead-links { order: 4; } .masthead-links a { display: none; } .masthead-links a:last-of-type { display: inline; } .sidebar { position: static; max-height: none; overflow: visible; padding-bottom: 1.5rem; border-bottom: 1px solid var(--line); margin-bottom: 1.5rem; } .sidebar[hidden] { display: none; } .sidebar ul { margin-bottom: 1rem; } }