/* Ursula — minimal, accessible CSS. No framework. */ /* ─── Variables ─────────────────────────────────────────────────────────────── */ /* * Theming has two layers, both pure CSS (no JS, no cookies): * * 1. PRIMARY — `prefers-color-scheme`. The light palette lives in `:root`; * the dark palette is applied automatically from the OS setting via the * media query below. This persists for free (follows the OS). * 2. OVERRIDE — `?theme=dark|light`. Ursula reads the param server-side and * sets `class="theme-dark"` / `class="theme-light"` on . The * forcing classes win over the media query by specificity, and the media * query is gated with `:not(.theme-light)` so forcing light on a dark OS * fully reverts. When the param is absent, the page falls back to the * automatic media query. * * Every color is a custom property so both palettes flow from one place. */ :root { --font: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif; --mono: ui-monospace, "Cascadia Code", "Fira Code", monospace; --max-width: 800px; /* Light palette (default) */ --color-bg: #ffffff; --color-text: #1a1a1a; --color-muted: #666666; --color-border: #e0e0e0; --color-link: #1a56b0; --color-link-hover: #0d3e8c; --color-primary: #1a56b0; --color-primary-hover: #0d3e8c; --color-on-primary: #ffffff; --color-mark: #fff3b0; --color-mark-text: #1a1a1a; --color-badge-bg: #e8f0fe; --color-badge-text: #1a56b0; --color-warning: #856404; --color-warning-bg: #fff3cd; --color-focus-ring: rgba(26, 86, 176, 0.2); --shadow-card: 0 1px 3px rgba(0, 0, 0, 0.08); --shadow-card-hover: 0 2px 8px rgba(0, 0, 0, 0.12); /* Per-collection badge palette (light) */ --badge-guidance-bg: #e3f2fd; --badge-guidance-text: #1565c0; --badge-clearance-bg: #e8f5e9; --badge-clearance-text: #2e7d32; --badge-fedreg-bg: #fce4ec; --badge-fedreg-text: #c62828; --badge-legislative-bg: #f3e5f5; --badge-legislative-text: #6a1b9a; --badge-cdrh-bg: #fff3e0; --badge-cdrh-text: #c44200; /* darkened from #e65100 for WCAG AA (4.6:1) */ --radius: 4px; --spacing-sm: 0.5rem; --spacing-md: 1rem; --spacing-lg: 1.5rem; --spacing-xl: 2rem; } /* * Dark palette. Defined identically in two places so both entry points share * the same values: the media query (OS-automatic, opted out of by an explicit * `?theme=light`) and the `.theme-dark` forcing class (explicit `?theme=dark`). */ @media (prefers-color-scheme: dark) { :root:not(.theme-light) { --color-bg: #121212; --color-text: #e8e8e8; --color-muted: #9a9a9a; --color-border: #333333; --color-link: #7baaf7; --color-link-hover: #a8c7fa; --color-primary: #7baaf7; --color-primary-hover: #a8c7fa; --color-on-primary: #121212; --color-mark: #665c00; --color-mark-text: #e8e8e8; --color-badge-bg: #1e2b4a; --color-badge-text: #7baaf7; --color-warning: #ffc107; --color-warning-bg: #332701; --color-focus-ring: rgba(123, 170, 247, 0.3); --shadow-card: 0 1px 3px rgba(0, 0, 0, 0.4); --shadow-card-hover: 0 2px 8px rgba(0, 0, 0, 0.6); --badge-guidance-bg: #0d2f4f; --badge-guidance-text: #7baaf7; --badge-clearance-bg: #0d2f1a; --badge-clearance-text: #66bb6a; --badge-fedreg-bg: #3b0d17; --badge-fedreg-text: #ef9a9a; --badge-legislative-bg: #2a0d3b; --badge-legislative-text: #ce93d8; --badge-cdrh-bg: #3b1f0d; --badge-cdrh-text: #ffb74d; } } /* Explicit `?theme=dark` override — wins over the media query by specificity. */ :root.theme-dark { --color-bg: #121212; --color-text: #e8e8e8; --color-muted: #9a9a9a; --color-border: #333333; --color-link: #7baaf7; --color-link-hover: #a8c7fa; --color-primary: #7baaf7; --color-primary-hover: #a8c7fa; --color-on-primary: #121212; --color-mark: #665c00; --color-mark-text: #e8e8e8; --color-badge-bg: #1e2b4a; --color-badge-text: #7baaf7; --color-warning: #ffc107; --color-warning-bg: #332701; --color-focus-ring: rgba(123, 170, 247, 0.3); --shadow-card: 0 1px 3px rgba(0, 0, 0, 0.4); --shadow-card-hover: 0 2px 8px rgba(0, 0, 0, 0.6); --badge-guidance-bg: #0d2f4f; --badge-guidance-text: #7baaf7; --badge-clearance-bg: #0d2f1a; --badge-clearance-text: #66bb6a; --badge-fedreg-bg: #3b0d17; --badge-fedreg-text: #ef9a9a; --badge-legislative-bg: #2a0d3b; --badge-legislative-text: #ce93d8; --badge-cdrh-bg: #3b1f0d; --badge-cdrh-text: #ffb74d; } /* ─── Reset ──────────────────────────────────────────────────────────────────── */ *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; } /* ─── Base ───────────────────────────────────────────────────────────────────── */ html { font-size: 16px; scroll-behavior: smooth; } body { font-family: var(--font); background-color: var(--color-bg); color: var(--color-text); line-height: 1.6; min-height: 100vh; display: flex; flex-direction: column; } a { color: var(--color-link); text-decoration: none; } a:hover { color: var(--color-link-hover); text-decoration: underline; } /* ─── Skip link (accessibility) ──────────────────────────────────────────────── */ .skip-link { position: absolute; top: -100px; left: 0; background: var(--color-primary); color: var(--color-on-primary); padding: var(--spacing-sm) var(--spacing-md); z-index: 100; border-radius: 0 0 var(--radius) 0; } .skip-link:focus { top: 0; } /* ─── Screen-reader only ─────────────────────────────────────────────────────── */ .sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0, 0, 0, 0); white-space: nowrap; border-width: 0; } /* ─── Header / Nav ───────────────────────────────────────────────────────────── */ header { border-bottom: 1px solid var(--color-border); padding: var(--spacing-sm) var(--spacing-md); background-color: var(--color-bg); } nav { max-width: var(--max-width); margin: 0 auto; display: flex; align-items: center; justify-content: space-between; gap: var(--spacing-md); } .nav-brand { font-size: 1.25rem; font-weight: 700; color: var(--color-text); text-decoration: none; letter-spacing: -0.02em; } .nav-brand:hover { color: var(--color-primary); text-decoration: none; } /* "(Beta)" tag next to the brand: smaller, muted, non-bold, normal letter-spacing so it reads as a status marker rather than part of the product name. */ .beta-tag { margin-left: 0.4em; font-size: 0.7rem; font-weight: 400; letter-spacing: normal; color: var(--color-text-muted); vertical-align: super; } /* CSS-only hamburger disclosure (#127): a native
/ menu — no JavaScript, no checkbox-hack. The open panel is `position: absolute` so it OVERLAYS the header rather than growing it: opening the menu causes zero layout shift of the search band at any viewport (Adv-P). Reuses existing --color-* custom properties only (no new palette pair). */ .nav-menu { position: relative; } .nav-menu-toggle { cursor: pointer; color: var(--color-muted); font-size: 0.9rem; padding: var(--spacing-sm); /* Suppress the default disclosure triangle so it reads as a menu control. */ list-style: none; } .nav-menu-toggle::-webkit-details-marker { display: none; } .nav-menu-toggle:hover { color: var(--color-text); } .nav-menu-panel { list-style: none; position: absolute; right: 0; top: 100%; z-index: 20; margin-top: var(--spacing-sm); padding: var(--spacing-sm); min-width: 11rem; display: flex; flex-direction: column; gap: var(--spacing-sm); background-color: var(--color-bg); border: 1px solid var(--color-border); border-radius: var(--radius); } .nav-menu-panel a { display: block; color: var(--color-muted); font-size: 0.9rem; } .nav-menu-panel a:hover, .nav-menu-panel a.active { color: var(--color-text); text-decoration: none; } /* ─── Main content ───────────────────────────────────────────────────────────── */ main { flex: 1; max-width: var(--max-width); width: 100%; margin: 0 auto; padding: var(--spacing-xl) var(--spacing-md); } /* ─── Search hero (index page) ───────────────────────────────────────────────── */ .search-hero { text-align: center; padding: var(--spacing-xl) 0; } .search-hero h1 { font-size: 2rem; font-weight: 700; margin-bottom: var(--spacing-sm); letter-spacing: -0.03em; } .tagline { color: var(--color-muted); margin-bottom: var(--spacing-lg); font-size: 1rem; } /* ─── Search form ────────────────────────────────────────────────────────────── */ .search-row { display: flex; gap: var(--spacing-sm); max-width: 600px; margin: 0 auto; } input[type="search"], input[type="text"] { flex: 1; padding: 0.6rem 0.8rem; border: 1px solid var(--color-border); border-radius: var(--radius); font-family: var(--font); font-size: 1rem; color: var(--color-text); background-color: var(--color-bg); outline: none; min-width: 0; } input[type="search"]:focus, input[type="text"]:focus { border-color: var(--color-primary); box-shadow: 0 0 0 2px var(--color-focus-ring); } button[type="submit"], button { padding: 0.6rem 1.2rem; background-color: var(--color-primary); color: var(--color-on-primary); border: none; border-radius: var(--radius); font-family: var(--font); font-size: 1rem; cursor: pointer; white-space: nowrap; transition: background-color 0.1s; } button:hover { background-color: var(--color-primary-hover); } /* ─── Search bar (results page) ──────────────────────────────────────────────── */ .search-bar { margin-bottom: var(--spacing-md); } .search-bar .search-row { margin: 0; max-width: 100%; } /* The compact bar is hoisted into the header band (#96) on every non-index page; center it to the same max-width as the nav (#124). A larger top margin pads the bar clear of the brand/nav row so the banner and the search bar read as two separated bands rather than a cramped stack (#126); no bottom margin in the header (the header padding closes the band). */ header .search-bar { max-width: var(--max-width); margin: var(--spacing-md) auto 0; } /* ─── Result meta (heading area) ─────────────────────────────────────────────── */ .result-meta { margin-bottom: var(--spacing-lg); padding-bottom: var(--spacing-sm); border-bottom: 1px solid var(--color-border); } /* Primary line: "N results for X" — sits at body size, query echo in bold. */ .result-summary { font-size: 1rem; color: var(--color-text); } /* Secondary line: page position + timing, demoted and muted. */ .result-stats { margin-top: 0.15rem; font-size: 0.8rem; color: var(--color-muted); } /* Keyword-vs-related split (#88): the count summary + no-JS filter link. Sits just below the primary summary, demoted like .result-stats but a touch larger so the filter link is easy to find and tap. */ .result-provenance { margin-top: 0.25rem; font-size: 0.85rem; color: var(--color-muted); } .provenance-link { white-space: nowrap; } .no-results { color: var(--color-text); padding: var(--spacing-lg) 0; } /* Degraded-response disclosure (#48): shown only when one or more collections timed out and were omitted. Uses the warning palette so it reads as a caveat, not an error. */ .result-incomplete, /* Honest-results disclosure (F-0421 P0): shown when the leading result does not clear the confidence floor. Deliberately its OWN class sharing this styling rather than reusing `.result-incomplete` — the two say different things ("we could not search everything" vs "what we found is not a direct match"), and a shared class would make them indistinguishable to the tests that assert each one appears only when it should. */ .result-confidence { margin-top: var(--spacing-sm); padding: var(--spacing-sm); font-size: 0.85rem; color: var(--color-warning); background-color: var(--color-warning-bg); border-radius: 4px; } /* ─── Results list ───────────────────────────────────────────────────────────── */ .results-list { list-style: none; display: flex; flex-direction: column; gap: var(--spacing-lg); } /* ─── Result card (whole-card click target, #204) ──────────────────────────────── A subtle bordered card gives a large, obvious click target. The whole card is clickable with NO JavaScript (invariant R-001) via the "stretched link" pattern: the card is the positioned containing block, and the title anchor's `::after` overlay (below) covers the card, so a click anywhere on it opens the detail page. Inner links (the external source URL) sit above the overlay so they stay independently clickable and keyboard-focusable. */ .result-card { position: relative; display: flex; align-items: baseline; gap: var(--spacing-md); padding: var(--spacing-md); border: 1px solid var(--color-border); border-radius: var(--radius); transition: border-color 0.15s ease, box-shadow 0.15s ease; } /* Hover affordance: the whole card lights up, signalling it is one click target. */ .result-card:hover { border-color: var(--color-primary); box-shadow: 0 1px 4px rgb(0 0 0 / 8%); } /* Rank hangs in a fixed left gutter; the body block is indented beside it and wraps aligned under itself (hanging-indent, numbered-list feel). Kept subtle so it orients without competing with the title. */ .result-rank { flex-shrink: 0; min-width: 1.5rem; text-align: right; font-size: 0.8rem; font-weight: 400; color: var(--color-muted); /* Nudge the lighter rank down to baseline-align with the title text. */ position: relative; top: 0.05rem; } .result-body { flex: 1; min-width: 0; } .result-title { font-size: 1rem; font-weight: 600; margin-bottom: var(--spacing-sm); line-height: 1.3; } .result-title a { color: var(--color-text); } .result-title a:hover { color: var(--color-primary); } /* Stretched-link overlay (#204): the title anchor's `::after` covers the whole card, making the entire card a single click target with no JS. Sits below inner links (which raise their own z-index) so those stay clickable. */ .result-title a::after { content: ""; position: absolute; inset: 0; z-index: 1; } /* Card-wide, visible focus ring: the stretched title anchor is the focusable element, so its focus outline is drawn on the overlay spanning the whole card. */ .result-title a:focus-visible::after { outline: 2px solid var(--color-primary); outline-offset: -2px; border-radius: var(--radius); } .result-meta-line { display: flex; align-items: center; flex-wrap: wrap; gap: var(--spacing-sm); margin-bottom: var(--spacing-sm); font-size: 0.85rem; } .result-date, .page-ref, .chunk-ref, .result-passages, /* The matched capture's standing + capture date (#244). Sits in the muted meta line with the other provenance facts — it is a disclosure, not a warning. */ .result-standing, /* How strictly this result matched the query (F-0421 P0) — exact / near / all-terms-present / related-by-meaning. A disclosure, in the same muted meta line as the other provenance facts, never a warning: the set-level banner is where a low-confidence RESULT SET is called out. */ .result-match-tier { color: var(--color-muted); } .result-snippet { font-size: 0.9rem; color: var(--color-text); line-height: 1.5; margin-bottom: var(--spacing-sm); } /* Full destination URL under the result title — the complete URL is the link text, so it must wrap rather than overflow on narrow screens (mirrors `.doc-source`). */ .result-source { font-size: 0.8rem; margin-bottom: var(--spacing-sm); word-break: break-all; line-height: 1.4; /* Sit above the whole-card stretched-link overlay (#204) so this inner link stays independently clickable and keyboard-focusable. */ position: relative; z-index: 2; } .result-source a { color: var(--color-link); } .result-source a:hover { color: var(--color-primary); } /* ─── Document detail page (#55) ─────────────────────────────────────────────── */ .doc-detail { max-width: 50rem; margin: 0 auto; } .doc-header { margin-bottom: var(--spacing-lg); padding-bottom: var(--spacing-md); border-bottom: 1px solid var(--color-border); } .doc-title { font-size: 1.5rem; line-height: 1.25; margin-bottom: var(--spacing-sm); } /* Populate-timing line — muted and small, mirroring .result-stats. */ .doc-stats { margin-top: 0.15rem; font-size: 0.8rem; color: var(--color-muted); } .doc-author { color: var(--color-muted); font-size: 0.85rem; } .doc-source { margin-top: var(--spacing-sm); font-size: 0.85rem; word-break: break-all; } .doc-source a { color: var(--color-link); } /* Copyable BibTeX cite block at the top of the detail page (#62). */ .doc-cite { margin-top: var(--spacing-md); } .doc-cite-label { font-size: 0.85rem; font-weight: 600; color: var(--color-muted); margin-bottom: var(--spacing-xs, 0.25rem); } .doc-bibtex { background-color: var(--color-code-bg, var(--color-badge-bg)); border: 1px solid var(--color-border); border-radius: var(--radius-sm, 4px); padding: var(--spacing-sm); font-size: 0.8rem; line-height: 1.4; overflow-x: auto; white-space: pre-wrap; word-break: break-word; } /* Structured bibliographic fields (author / source / date / DOI / type). */ .doc-bib-fields { margin-top: var(--spacing-md); font-size: 0.85rem; display: grid; grid-template-columns: max-content 1fr; gap: 0.15rem var(--spacing-sm); } .doc-bib-fields dt { color: var(--color-muted); font-weight: 600; } .doc-bib-fields dd { margin: 0; color: var(--color-text); } .doc-body { line-height: 1.6; } /* One matching passage: page reference above its (highlighted) text (#63). */ .doc-passage { margin-bottom: var(--spacing-md); padding-bottom: var(--spacing-sm); border-bottom: 1px solid var(--color-border); } .doc-passage-meta { font-size: 0.8rem; margin-bottom: var(--spacing-xs, 0.25rem); } .doc-passage-note { color: var(--color-muted); font-style: italic; font-size: 0.85rem; margin-bottom: var(--spacing-md); } .doc-chunk { color: var(--color-text); white-space: pre-wrap; } .doc-empty { color: var(--color-muted); font-style: italic; } /* ─── Collection badges ──────────────────────────────────────────────────────── */ .collection-badge { display: inline-block; padding: 0.1rem 0.5rem; border-radius: 9999px; font-size: 0.75rem; font-weight: 600; background-color: var(--color-badge-bg); color: var(--color-badge-text); white-space: nowrap; text-transform: uppercase; letter-spacing: 0.04em; } /* Per-collection color overrides. Colors come from custom properties so both the automatic media query and the `?theme=` forcing classes drive them from one place — no direct-selector dark block to leave half-themed. */ .collection-guidance { background-color: var(--badge-guidance-bg); color: var(--badge-guidance-text); } .collection-clearance-package, .collection-decision-summary { background-color: var(--badge-clearance-bg); color: var(--badge-clearance-text); } .collection-federal-register { background-color: var(--badge-fedreg-bg); color: var(--badge-fedreg-text); } .collection-legislative, .collection-laws { background-color: var(--badge-legislative-bg); color: var(--badge-legislative-text); } .collection-cdrh-learn { background-color: var(--badge-cdrh-bg); color: var(--badge-cdrh-text); } /* ─── Highlighting ───────────────────────────────────────────────────────────── */ mark { background-color: var(--color-mark); color: var(--color-mark-text); padding: 0 0.1em; border-radius: 2px; } /* ─── Pagination (classic Google style: prev left, numbers centered, next right) */ .pagination { display: flex; align-items: center; gap: var(--spacing-md); margin-top: var(--spacing-lg); padding-top: var(--spacing-md); border-top: 1px solid var(--color-border); font-size: 0.9rem; } /* Prev/Next sit in equal-width flanks so the numbers stay centered even when one side is empty (first/last page). */ .page-side { flex: 1; display: flex; } .page-side-prev { justify-content: flex-start; } .page-side-next { justify-content: flex-end; } .page-numbers { display: flex; flex-wrap: wrap; align-items: baseline; justify-content: center; gap: var(--spacing-md); } /* Plain "little blue links" — no box/border. Applies to numbered pages and Prev/Next alike. */ .page-link { color: var(--color-link); font-size: 0.9rem; } a.page-link:hover { text-decoration: underline; } /* Current page: highlighted, non-interactive. A subtle pill (no border) marks "you are here" while the other links stay plain blue text. */ .page-current { background-color: var(--color-badge-bg); color: var(--color-text); padding: 0.1rem 0.5rem; border-radius: var(--radius); font-weight: 700; cursor: default; } /* ─── About page ─────────────────────────────────────────────────────────────── */ .about-content h1 { font-size: 1.8rem; font-weight: 700; margin-bottom: var(--spacing-lg); letter-spacing: -0.02em; } .about-content h2 { font-size: 1.2rem; font-weight: 600; margin-top: var(--spacing-xl); margin-bottom: var(--spacing-md); } .about-content p { margin-bottom: var(--spacing-md); line-height: 1.7; } .about-content ul { margin-bottom: var(--spacing-md); padding-left: var(--spacing-lg); } .about-content li { margin-bottom: var(--spacing-sm); line-height: 1.6; } .about-content code { font-family: var(--mono); font-size: 0.9em; background-color: var(--color-border); padding: 0.1em 0.3em; border-radius: 3px; } /* ─── Warning banner ──────────────────────────────────────────────────────────── */ .warning { color: var(--color-warning); background-color: var(--color-warning-bg); padding: var(--spacing-sm) var(--spacing-md); border-radius: var(--radius); font-size: 0.9rem; margin-top: var(--spacing-md); display: inline-block; } /* ─── Footer ─────────────────────────────────────────────────────────────────── */ footer { border-top: 1px solid var(--color-border); padding: var(--spacing-md); text-align: center; font-size: 0.85rem; color: var(--color-muted); } /* ─── Responsive ─────────────────────────────────────────────────────────────── */ @media (max-width: 768px) { .search-hero h1 { font-size: 1.5rem; } .search-row { flex-direction: column; } button[type="submit"] { width: 100%; } .pagination { flex-wrap: wrap; gap: var(--spacing-sm); } }