/* Relata interface styles.
   Design constraints, deliberately: readable body text at 16px or larger, no
   text over images, no decorative animation, visible focus outlines, and
   layouts that reflow rather than scroll horizontally. */

:root {
  --ink: #16191d;
  --ink-soft: #4a525c;
  --ink-faint: #6b7480;
  --paper: #ffffff;
  --surface: #f6f7f9;
  --surface-alt: #eef0f4;
  --line: #d3d8df;
  --accent: #1f5f8b;
  --accent-dark: #164961;
  --ok: #1c6b41;
  --ok-bg: #e6f4ec;
  --warn: #8a5a00;
  --warn-bg: #fdf3e0;
  --danger: #a02020;
  --danger-bg: #fbeaea;
  --attention: #6b3fa0;
  --radius: 6px;
  --gap: 1rem;
  --measure: 72ch;
}

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

html { font-size: 100%; }

body {
  margin: 0;
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  font-size: 1rem;
  line-height: 1.55;
  color: var(--ink);
  background: var(--surface);
}

/* Keyboard access ------------------------------------------------------- */

.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  background: var(--accent);
  color: #fff;
  padding: 0.75rem 1rem;
  z-index: 100;
}
.skip-link:focus { left: 0; }

:focus-visible {
  outline: 3px solid var(--accent);
  outline-offset: 2px;
}

.visually-hidden {
  position: absolute;
  width: 1px; height: 1px;
  padding: 0; margin: -1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
  border: 0;
}

/* Masthead -------------------------------------------------------------- */

.masthead {
  background: var(--paper);
  border-bottom: 1px solid var(--line);
}

.masthead-inner {
  max-width: 78rem;
  margin: 0 auto;
  padding: 0.75rem 1.25rem;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--gap);
}

.brand {
  font-weight: 700;
  font-size: 1.25rem;
  color: var(--ink);
  text-decoration: none;
  letter-spacing: -0.01em;
}

.nav-list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.25rem 1rem;
  list-style: none;
  margin: 0;
  padding: 0;
  flex: 1;
}

.nav-list a {
  color: var(--ink-soft);
  text-decoration: none;
  padding: 0.35rem 0.15rem;
  border-bottom: 2px solid transparent;
  display: inline-block;
}
.nav-list a:hover { color: var(--ink); border-bottom-color: var(--line); }
.nav-list a[aria-current="page"] { color: var(--accent); border-bottom-color: var(--accent); font-weight: 600; }

.signout { display: flex; align-items: center; gap: 0.5rem; margin: 0; }
.whoami { color: var(--ink-faint); font-size: 0.9375rem; }

.badge {
  display: inline-block;
  min-width: 1.4em;
  padding: 0 0.35em;
  border-radius: 999px;
  background: var(--attention);
  color: #fff;
  font-size: 0.8125rem;
  text-align: center;
}

/* Page ------------------------------------------------------------------ */

.page {
  max-width: 78rem;
  margin: 0 auto;
  padding: 1.5rem 1.25rem 3rem;
}

h1 { font-size: 1.75rem; line-height: 1.25; margin: 0 0 1rem; }
h2 { font-size: 1.3125rem; line-height: 1.3; margin: 2rem 0 0.75rem; }
h3 { font-size: 1.0625rem; margin: 1.5rem 0 0.5rem; }
h4 { font-size: 1rem; margin: 1rem 0 0.4rem; }

p { max-width: var(--measure); }
.muted { color: var(--ink-faint); }
.hint { color: var(--ink-faint); font-size: 0.9375rem; margin: 0.25rem 0 0; }

a { color: var(--accent); }
a:hover { color: var(--accent-dark); }

code {
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 0.9em;
  background: var(--surface-alt);
  padding: 0.1em 0.35em;
  border-radius: 3px;
}

pre {
  background: var(--surface-alt);
  padding: 0.75rem 1rem;
  border-radius: var(--radius);
  overflow-x: auto;
  font-size: 0.9375rem;
}
pre code { background: none; padding: 0; }

/* Flashes and callouts -------------------------------------------------- */

.flash {
  padding: 0.75rem 1rem;
  border-radius: var(--radius);
  border-left: 4px solid;
  margin: 0 0 1.25rem;
  max-width: var(--measure);
}
.flash-success { background: var(--ok-bg); border-color: var(--ok); color: #124b2d; }
.flash-error   { background: var(--danger-bg); border-color: var(--danger); color: #7a1818; }
.flash-warn    { background: var(--warn-bg); border-color: var(--warn); color: #6b4600; }
.flash-info    { background: var(--surface-alt); border-color: var(--accent); }

.callout {
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 1rem 1.25rem;
  margin: 1.5rem 0;
}
.callout-warn { background: var(--warn-bg); border-color: #e8cf9c; }
.callout h2, .callout h3 { margin-top: 0; }

/* Buttons and forms ----------------------------------------------------- */

.btn {
  display: inline-block;
  padding: 0.5rem 0.9rem;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--paper);
  color: var(--ink);
  font: inherit;
  font-size: 0.9375rem;
  text-decoration: none;
  cursor: pointer;
}
.btn:hover { background: var(--surface-alt); color: var(--ink); }
.btn:disabled { opacity: 0.5; cursor: not-allowed; }

.btn-primary { background: var(--accent); border-color: var(--accent); color: #fff; font-weight: 600; }
.btn-primary:hover { background: var(--accent-dark); color: #fff; }
.btn-danger { color: var(--danger); border-color: #e3b6b6; }
.btn-danger:hover { background: var(--danger-bg); }
.btn-ok { color: var(--ok); border-color: #b3ddc4; }
.btn-ok:hover { background: var(--ok-bg); }
.btn-quiet { border-color: transparent; background: none; color: var(--ink-soft); }
.btn-small { padding: 0.25rem 0.55rem; font-size: 0.875rem; }

.stack { display: flex; flex-direction: column; gap: 1rem; max-width: 46rem; }
.row { display: flex; flex-wrap: wrap; gap: 1rem; }
.row > .field { flex: 1 1 14rem; }

.field { display: flex; flex-direction: column; gap: 0.3rem; }
.field-wide { max-width: none; }

label { font-weight: 600; font-size: 0.9375rem; }

input[type="text"], input[type="search"], input[type="password"],
input[type="date"], input[type="number"], input[type="file"],
select, textarea {
  font: inherit;
  font-size: 1rem;
  padding: 0.5rem 0.6rem;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--paper);
  color: var(--ink);
  width: 100%;
  max-width: 46rem;
}

textarea { font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; font-size: 0.9375rem; resize: vertical; }

.field-check { flex-direction: row; align-items: center; gap: 0.5rem; }
.field-check input { width: auto; }
.field-check label { font-weight: 400; }

fieldset { border: 1px solid var(--line); border-radius: var(--radius); padding: 1rem; }
legend { font-weight: 600; padding: 0 0.4rem; }

.inline-form { display: inline-flex; gap: 0.4rem; align-items: center; margin: 0; flex-wrap: wrap; }
.inline-form input[type="text"] { width: auto; min-width: 12rem; }
.inline-grid { display: flex; flex-wrap: wrap; gap: 1rem; align-items: flex-end; margin-top: 1rem; }
.inline-grid .field { flex: 1 1 14rem; }

.filter-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  align-items: flex-end;
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 1rem;
  margin-bottom: 1.5rem;
}
.filter-bar .field { flex: 0 1 14rem; }

/* Search ---------------------------------------------------------------- */

.search-form {
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 1.25rem;
  margin-bottom: 1.5rem;
}
.search-form input[type="search"] { max-width: none; font-size: 1.0625rem; }
.search-actions { display: flex; flex-wrap: wrap; gap: 0.6rem; margin-top: 1rem; }

.filters { margin-top: 1rem; }
.filters summary { cursor: pointer; font-weight: 600; padding: 0.35rem 0; }
.filter-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(14rem, 1fr));
  gap: 1rem;
  margin-top: 0.75rem;
}

.score-key {
  background: var(--surface-alt);
  padding: 0.75rem 1rem;
  border-radius: var(--radius);
  font-size: 0.9375rem;
  max-width: none;
}

.result-list { list-style: none; padding: 0; margin: 0; counter-reset: result; }
.result {
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 1rem 1.25rem;
  margin-bottom: 1rem;
}
.result h3 { margin: 0 0 0.4rem; font-size: 1.125rem; }
.result-scores { display: flex; flex-wrap: wrap; gap: 0.75rem; align-items: center; margin: 0 0 0.6rem; font-size: 0.9375rem; max-width: none; }
.metric { color: var(--ink-soft); }
.excerpt { margin: 0.5rem 0; color: var(--ink-soft); max-width: none; }

.via-note {
  background: var(--warn-bg);
  border-left: 3px solid var(--warn);
  padding: 0.5rem 0.75rem;
  font-size: 0.9375rem;
  margin: 0.5rem 0;
  max-width: none;
}

.why { margin-top: 0.75rem; }
.why summary { cursor: pointer; font-weight: 600; font-size: 0.9375rem; color: var(--accent); }
.why-list { margin: 0.5rem 0; padding-left: 1.25rem; font-size: 0.9375rem; }
.matched-chunks blockquote, .chunk blockquote, .claim-quote, .rel-excerpts blockquote {
  margin: 0.35rem 0 0.75rem;
  padding: 0.5rem 0.85rem;
  border-left: 3px solid var(--line);
  background: var(--surface);
  font-size: 0.9375rem;
  color: var(--ink-soft);
}
.chunk-loc { font-size: 0.875rem; color: var(--ink-faint); }

.example-list { list-style: none; padding: 0; }
.example-list li { margin: 0.5rem 0; }

/* Answer ---------------------------------------------------------------- */

.answer {
  background: var(--paper);
  border: 2px solid var(--accent);
  border-radius: var(--radius);
  padding: 1.25rem 1.5rem;
  margin-bottom: 2rem;
}
.answer-caveat { background: var(--surface-alt); padding: 0.6rem 0.85rem; border-radius: var(--radius); font-size: 0.9375rem; max-width: none; }
.answer-body p { max-width: var(--measure); }
.source-list { padding-left: 1.25rem; }
.source { margin-bottom: 1rem; }
.source-head { display: flex; flex-wrap: wrap; gap: 0.5rem; align-items: center; margin: 0 0 0.25rem; max-width: none; }
.source-uncited { opacity: 0.72; }
.ref { font-weight: 700; background: var(--surface-alt); padding: 0.05rem 0.4rem; border-radius: 3px; }
.conflict-list { background: var(--warn-bg); border-left: 4px solid var(--warn); padding: 0.75rem 1rem 0.75rem 2rem; border-radius: var(--radius); }
.conflict-list li { margin: 0.35rem 0; }
.answer-meta { font-size: 0.875rem; }

/* Stats ----------------------------------------------------------------- */

.stat-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(10rem, 1fr));
  gap: 0.75rem;
  list-style: none;
  padding: 0;
  margin: 0 0 2rem;
}
.stat-grid-compact { margin-bottom: 1rem; }
.stat {
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 0.9rem 1rem;
  display: flex;
  flex-direction: column;
  gap: 0.15rem;
}
.stat-value { font-size: 1.75rem; font-weight: 700; line-height: 1.1; }
.stat-label { font-size: 0.875rem; color: var(--ink-faint); }
.stat-warn { border-color: var(--danger); background: var(--danger-bg); }
.stat-attention { border-color: var(--attention); }

.two-col { display: grid; grid-template-columns: repeat(auto-fit, minmax(22rem, 1fr)); gap: 2rem; }

/* Lists and tables ------------------------------------------------------ */

.item-list { list-style: none; padding: 0; margin: 0; }
.item-row { padding: 0.7rem 0; border-bottom: 1px solid var(--line); }
.item-row:last-child { border-bottom: none; }
.item-title { font-weight: 600; text-decoration: none; }
.item-meta { display: flex; flex-wrap: wrap; gap: 0.6rem; margin: 0.25rem 0 0; font-size: 0.875rem; color: var(--ink-faint); max-width: none; }

.table {
  width: 100%;
  border-collapse: collapse;
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  font-size: 0.9375rem;
  display: block;
  overflow-x: auto;
}
.table thead { background: var(--surface-alt); }
.table th, .table td { padding: 0.55rem 0.75rem; text-align: left; border-bottom: 1px solid var(--line); vertical-align: top; }
.table th { font-weight: 600; }
.table tbody tr:last-child td { border-bottom: none; }
.table .num { text-align: right; font-variant-numeric: tabular-nums; }
.table-compact { font-size: 0.875rem; }
.error-cell { max-width: 22rem; color: var(--danger); }

.meta-list { display: grid; grid-template-columns: minmax(10rem, max-content) 1fr; gap: 0.35rem 1rem; margin: 0; }
.meta-list dt { font-weight: 600; color: var(--ink-soft); }
.meta-list dd { margin: 0; overflow-wrap: anywhere; }

/* Pills and tags -------------------------------------------------------- */

.pill {
  display: inline-block;
  padding: 0.1rem 0.5rem;
  border-radius: 999px;
  background: var(--surface-alt);
  font-size: 0.8125rem;
  color: var(--ink-soft);
  white-space: nowrap;
}
.pill-ok, .pill-ready { background: var(--ok-bg); color: var(--ok); }
.pill-warn, .pill-partial { background: var(--warn-bg); color: var(--warn); }
.pill-failed { background: var(--danger-bg); color: var(--danger); }
.pill-quiet { opacity: 0.75; }
.pill-job-running { background: #e3edf6; color: var(--accent-dark); }
.pill-job-pending { background: var(--surface-alt); }
.pill-job-succeeded { background: var(--ok-bg); color: var(--ok); }
.pill-job-failed { background: var(--danger-bg); color: var(--danger); }
.pill-prov-model_inferred { background: var(--warn-bg); color: var(--warn); }
.pill-prov-user_confirmed, .pill-prov-explicit { background: var(--ok-bg); color: var(--ok); }
.pill-prov-user_rejected { background: var(--danger-bg); color: var(--danger); }
.pill-review-pending { background: var(--surface-alt); }
.pill-review-confirmed { background: var(--ok-bg); color: var(--ok); }
.pill-review-rejected { background: var(--danger-bg); color: var(--danger); }

.tag {
  display: inline-block;
  padding: 0.1rem 0.5rem;
  margin: 0.1rem 0.2rem 0.1rem 0;
  background: var(--surface-alt);
  border-radius: 3px;
  font-size: 0.875rem;
  text-decoration: none;
}

/* Item detail ----------------------------------------------------------- */

.item-detail { background: var(--paper); border: 1px solid var(--line); border-radius: var(--radius); padding: 1.5rem; }
.detail-head { border-bottom: 1px solid var(--line); padding-bottom: 1rem; margin-bottom: 1rem; }
.detail-actions { display: flex; flex-wrap: wrap; gap: 0.6rem; margin-top: 0.75rem; }

.tabs { display: flex; flex-wrap: wrap; gap: 1rem; padding: 0.5rem 0; border-bottom: 1px solid var(--line); margin-bottom: 1rem; }
.tabs a { font-size: 0.9375rem; text-decoration: none; }

.content-block { max-height: 32rem; overflow: auto; white-space: pre-wrap; word-break: break-word; }

.chunk-list, .claim-list { list-style: none; padding: 0; }
.chunk, .claim { border: 1px solid var(--line); border-radius: var(--radius); padding: 0.75rem 1rem; margin-bottom: 0.75rem; }
.chunk-head, .claim-meta { display: flex; flex-wrap: wrap; gap: 0.6rem; font-size: 0.875rem; margin: 0 0 0.4rem; max-width: none; }
.claim-statement { font-weight: 600; margin: 0 0 0.35rem; }
.entity-list { list-style: none; padding: 0; display: flex; flex-wrap: wrap; gap: 0.5rem 1rem; }
.entity-list li { display: flex; gap: 0.4rem; align-items: center; font-size: 0.9375rem; }

/* Relationships --------------------------------------------------------- */

.relationship {
  background: var(--paper);
  border: 1px solid var(--line);
  border-left: 4px solid var(--accent);
  border-radius: var(--radius);
  padding: 1rem 1.25rem;
  margin-bottom: 1.25rem;
}
.rel-head { margin-bottom: 0.5rem; }
.rel-title { font-weight: 600; margin: 0; display: flex; flex-wrap: wrap; gap: 0.5rem; align-items: baseline; max-width: none; }
.rel-arrow { color: var(--ink-faint); font-weight: 400; font-style: italic; }
.rel-meta { display: flex; flex-wrap: wrap; gap: 0.75rem; align-items: center; margin: 0.35rem 0 0; font-size: 0.9375rem; max-width: none; }

.inference-note {
  background: var(--warn-bg);
  border-left: 3px solid var(--warn);
  padding: 0.5rem 0.75rem;
  font-size: 0.9375rem;
  margin: 0.5rem 0;
  max-width: none;
}
.rel-excerpts blockquote cite { display: block; font-size: 0.8125rem; color: var(--ink-faint); font-style: normal; margin-bottom: 0.2rem; }
.evidence { margin: 0.75rem 0; }
.evidence summary { cursor: pointer; font-weight: 600; font-size: 0.9375rem; color: var(--accent); }
.model-opinion { background: var(--surface); padding: 0.75rem 1rem; border-radius: var(--radius); margin-top: 1rem; }
.history-list { font-size: 0.9375rem; padding-left: 1.25rem; }
.note { color: var(--ink-soft); font-style: italic; }
.rel-actions { display: flex; flex-wrap: wrap; gap: 0.75rem; align-items: center; margin-top: 0.75rem; padding-top: 0.75rem; border-top: 1px solid var(--line); }

/* Neighbourhood --------------------------------------------------------- */

.neighbourhood { display: grid; grid-template-columns: repeat(auto-fit, minmax(18rem, 1fr)); gap: 1.5rem; align-items: start; }
.neighbour-col { background: var(--paper); border: 1px solid var(--line); border-radius: var(--radius); padding: 1rem 1.25rem; }
.neighbour-centre { border-color: var(--accent); border-width: 2px; }
.neighbour-list { list-style: none; padding: 0; margin: 0; }
.neighbour-list li { padding: 0.6rem 0; border-bottom: 1px solid var(--line); }
.neighbour-list li:last-child { border-bottom: none; }
.neighbour-meta { display: flex; flex-wrap: wrap; gap: 0.5rem; margin: 0.25rem 0 0; font-size: 0.875rem; color: var(--ink-faint); max-width: none; }
.neighbour-focus .item-title { font-weight: 700; font-size: 1.0625rem; margin: 0 0 0.35rem; }

/* Auth and empty states ------------------------------------------------- */

.auth-panel {
  max-width: 26rem;
  margin: 3rem auto;
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 2rem;
}

.empty {
  background: var(--paper);
  border: 1px dashed var(--line);
  border-radius: var(--radius);
  padding: 1.5rem;
  text-align: left;
}
.empty h2, .empty h3 { margin-top: 0; }

.error-page { max-width: 40rem; margin: 3rem auto; text-align: left; }

.pagination { display: flex; gap: 1rem; align-items: center; margin: 1.5rem 0; flex-wrap: wrap; }

/* Footer ---------------------------------------------------------------- */

.footer {
  border-top: 1px solid var(--line);
  background: var(--paper);
  padding: 1.25rem;
}
.footer p { max-width: 78rem; margin: 0 auto; font-size: 0.875rem; color: var(--ink-faint); }

/* Responsive ------------------------------------------------------------ */

@media (max-width: 40rem) {
  .masthead-inner { flex-direction: column; align-items: stretch; }
  .nav-list { gap: 0.25rem 0.75rem; }
  .page { padding: 1rem 0.9rem 2rem; }
  h1 { font-size: 1.5rem; }
  .meta-list { grid-template-columns: 1fr; }
  .meta-list dt { margin-top: 0.5rem; }
}

/* Honour a reduced-motion preference. Relata has no decorative animation,
   so this only affects smooth scrolling. */
@media (prefers-reduced-motion: reduce) {
  * { animation: none !important; transition: none !important; scroll-behavior: auto !important; }
}