/* Legal Casebase — design tokens + global styles
   Aesthetic: library catalogue. Paper neutrals + ink. Source Serif for case names,
   Inter for UI, JetBrains Mono for technical metadata.
*/

:root {
  /* Paper & ink — warm, slightly off-white */
  --paper: #fafaf7;
  --paper-2: #f3f2ec;
  --paper-3: #ebe9e0;
  --rule: #d8d5c8;
  --rule-soft: #e6e3d6;
  --ink: #1a1814;
  --ink-2: #3a352e;
  --ink-3: #6b6558;
  --ink-4: #95907f;

  /* Single accent: deep ink blue, used sparingly */
  --accent: oklch(0.42 0.10 255);
  --accent-soft: oklch(0.94 0.02 255);
  --accent-rule: oklch(0.78 0.05 255);

  /* Match-signal colors — muted */
  --signal-both: oklch(0.42 0.08 155);
  --signal-both-bg: oklch(0.94 0.025 155);
  --signal-fts: oklch(0.45 0.07 60);
  --signal-fts-bg: oklch(0.94 0.03 80);
  --signal-vec: oklch(0.45 0.08 290);
  --signal-vec-bg: oklch(0.94 0.025 290);

  /* Highlights inside snippets */
  --hl-bg: oklch(0.92 0.07 90);
  --hl-ink: oklch(0.30 0.06 60);

  /* Type */
  --serif: "Source Serif 4", "Source Serif Pro", Georgia, serif;
  --sans: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --mono: "JetBrains Mono", "SF Mono", Menlo, Consolas, monospace;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  padding: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 14px;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  font-feature-settings: "ss01", "cv11";
}

a {
  color: var(--accent);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
  text-underline-offset: 2px;
}

button {
  font-family: inherit;
  cursor: pointer;
}

/* ── Top chrome ───────────────────────────────────────────── */
.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 32px;
  border-bottom: 1px solid var(--rule);
  background: var(--paper);
}

.topbar-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--serif);
  font-size: 16px;
  font-weight: 500;
  letter-spacing: 0.005em;
  color: var(--ink);
}

.topbar-brand-mark {
  width: 22px;
  height: 22px;
  display: grid;
  place-items: center;
  background: var(--ink);
  color: var(--paper);
  font-family: var(--serif);
  font-style: italic;
  font-size: 13px;
  line-height: 1;
  border-radius: 2px;
}

.topbar-brand small {
  font-family: var(--mono);
  font-size: 10.5px;
  color: var(--ink-3);
  font-weight: 400;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  margin-left: 2px;
}

.topbar-nav {
  display: flex;
  gap: 22px;
  font-size: 13px;
  color: var(--ink-3);
}

.topbar-nav a {
  color: var(--ink-3);
}

.topbar-nav a:hover {
  color: var(--ink);
  text-decoration: none;
}

.topbar-nav .active {
  color: var(--ink);
}

.topbar-meta {
  font-family: var(--mono);
  font-size: 11px;
  color: var(--ink-4);
  letter-spacing: 0.02em;
}

/* ── Footer ───────────────────────────────────────────────── */
.footer {
  border-top: 1px solid var(--rule);
  padding: 20px 32px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-family: var(--mono);
  font-size: 11px;
  color: var(--ink-4);
  letter-spacing: 0.02em;
  margin-top: 64px;
}

/* ── Reused atoms ─────────────────────────────────────────── */
.kbd {
  display: inline-block;
  font-family: var(--mono);
  font-size: 10.5px;
  padding: 1px 5px;
  border: 1px solid var(--rule);
  border-bottom-width: 2px;
  border-radius: 3px;
  color: var(--ink-3);
  background: var(--paper);
  line-height: 1.4;
}

.eyebrow {
  font-family: var(--mono);
  font-size: 10.5px;
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--ink-4);
}

.divider {
  border: 0;
  border-top: 1px solid var(--rule-soft);
  margin: 0;
}

/* ── Search field ─────────────────────────────────────────── */
.search-shell {
  display: flex;
  align-items: stretch;
  border: 1px solid var(--ink);
  background: #fff;
  transition: border-color 120ms ease;
}

.search-shell:focus-within {
  outline: 2px solid var(--accent);
  outline-offset: -1px;
}

.search-shell-icon {
  display: grid;
  place-items: center;
  width: 44px;
  color: var(--ink-3);
  border-right: 1px solid var(--rule-soft);
}

.search-shell input {
  flex: 1;
  border: 0;
  outline: 0;
  padding: 0 14px;
  font-family: var(--sans);
  font-size: 15px;
  color: var(--ink);
  background: transparent;
  min-width: 0;
}

.search-shell input::placeholder {
  color: var(--ink-4);
}

.search-shell-mode {
  display: flex;
  align-items: center;
  gap: 0;
  padding: 4px;
  border-left: 1px solid var(--rule-soft);
  background: var(--paper-2);
}

.mode-btn {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  padding: 6px 10px;
  border: 0;
  background: transparent;
  color: var(--ink-3);
  border-radius: 2px;
}

.mode-btn.active {
  background: var(--ink);
  color: var(--paper);
}

.mode-btn:not(.active):hover {
  color: var(--ink);
}

.search-shell-submit {
  border: 0;
  background: var(--ink);
  color: var(--paper);
  padding: 0 22px;
  font-family: var(--sans);
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 0.02em;
}

.search-shell-submit:hover {
  background: var(--ink-2);
}

/* ── Match-by chip ────────────────────────────────────────── */
.match-chip {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  font-family: var(--mono);
  font-size: 10.5px;
  font-weight: 500;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  padding: 2px 7px;
  border-radius: 2px;
  border: 1px solid currentColor;
  line-height: 1.5;
}

.match-chip-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: currentColor;
}

.match-chip.both {
  color: var(--signal-both);
  background: var(--signal-both-bg);
}

.match-chip.fts {
  color: var(--signal-fts);
  background: var(--signal-fts-bg);
}

.match-chip.vector {
  color: var(--signal-vec);
  background: var(--signal-vec-bg);
}

/* ── Snippet highlight ────────────────────────────────────── */
.hl {
  background: var(--hl-bg);
  color: var(--hl-ink);
  padding: 0 2px;
  border-radius: 1px;
  font-weight: 500;
}

/* ── Hover row reveal ─────────────────────────────────────── */
.row-actions {
  opacity: 0;
  transition: opacity 120ms ease;
}

.result-row:hover .row-actions {
  opacity: 1;
}

.result-row {
  transition: background 120ms ease;
}

.result-row:hover {
  background: var(--paper-2);
}

.result-row p {
  border-left: 0 !important;
  padding-left: 0 !important;
}

/* ── Tiny scrollbar polish for the prototype frame ───────── */
::-webkit-scrollbar {
  width: 10px;
  height: 10px;
}

::-webkit-scrollbar-thumb {
  background: var(--rule);
  border-radius: 4px;
}

::-webkit-scrollbar-track {
  background: transparent;
}

/* small pulse for "search running" feedback */
@keyframes pulse-bar {

  0%,
  100% {
    opacity: 0.35;
  }

  50% {
    opacity: 1;
  }
}

.pulse-bar {
  display: inline-block;
  width: 4px;
  height: 4px;
  margin: 0 2px;
  background: currentColor;
  border-radius: 50%;
  animation: pulse-bar 1s ease-in-out infinite;
}

.pulse-bar:nth-child(2) {
  animation-delay: 0.15s;
}

.pulse-bar:nth-child(3) {
  animation-delay: 0.30s;
}

/* ── Stats block ─────────────────────────────────────────── */
.stats-card {
  border: 1px solid var(--rule);
  background: var(--paper);
  padding: 16px 18px 14px;
}

.stats-card-head {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  margin-bottom: 10px;
}

.stats-rows {
  display: grid;
  grid-template-columns: 1fr auto;
  row-gap: 6px;
  column-gap: 16px;
  font-family: var(--mono);
  font-size: 12px;
  color: var(--ink-2);
}

.stats-rows .k {
  color: var(--ink-3);
}

.stats-rows .v {
  color: var(--ink);
  text-align: right;
  font-variant-numeric: tabular-nums;
}

.stats-rows .div {
  grid-column: 1 / -1;
  border-top: 1px solid var(--rule-soft);
  margin: 4px 0 2px;
}

.stats-foot {
  margin-top: 12px;
  font-family: var(--mono);
  font-size: 10.5px;
  color: var(--ink-4);
  letter-spacing: 0.02em;
  line-height: 1.55;
}

/* ── Home grid: examples + stats side-by-side, stack on small ─ */
.home-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.35fr) minmax(0, 1fr);
  gap: 36px;
  margin-top: 56px;
}

/* ── Results layout grid ─────────────────────────────────── */
.results-grid {
  flex: 1;
  display: grid;
  grid-template-columns: 260px minmax(0, 1fr);
  max-width: 1280px;
  width: 100%;
  margin: 0 auto;
}

.results-sidebar {
  border-right: 1px solid var(--rule);
  padding: 24px 24px 24px 32px;
  font-size: 13px;
}

.results-main {
  padding: 24px 32px 24px 24px;
  min-width: 0;
}

.score-strip {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(110px, max-content));
  gap: 22px;
  align-items: center;
  padding-top: 10px;
  border-top: 1px dashed var(--rule-soft);
}

.score-strip .chunk-id {
  margin-left: auto;
  font-family: var(--mono);
  font-size: 10.5px;
  color: var(--ink-4);
}

/* ── Case detail ─────────────────────────────────────────── */
.case-shell {
  min-height: calc(100vh - 56px);
  display: flex;
  flex-direction: column;
}

.case-grid {
  flex: 1;
  display: grid;
  grid-template-columns: 280px minmax(0, 1fr);
  max-width: 1280px;
  width: 100%;
  margin: 0 auto;
  align-items: start;
}

.case-rail {
  border-right: 1px solid var(--rule);
  padding: 28px 28px 28px 32px;
  position: sticky;
  top: 0;
  align-self: start;
  max-height: 100vh;
  overflow-y: auto;
}

.case-main {
  padding: 28px 32px 48px 32px;
  min-width: 0;
}

.case-opinion-switch {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  padding-bottom: 18px;
  margin-bottom: 18px;
  border-bottom: 1px solid var(--rule-soft);
}

.case-opinion-head {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  gap: 18px;
  padding-bottom: 16px;
  margin-bottom: 26px;
  border-bottom: 1px solid var(--rule);
  flex-wrap: wrap;
}

.case-opinion-meta {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
  font-family: var(--mono);
  font-size: 11px;
  color: var(--ink-3);
  letter-spacing: 0.02em;
}

.case-opinion-meta .sep {
  color: var(--ink-4);
}

.case-opinion-foot {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
  margin-top: 36px;
  padding-top: 16px;
  border-top: 1px dashed var(--rule-soft);
  font-family: var(--mono);
  font-size: 10.5px;
  color: var(--ink-4);
  letter-spacing: 0.02em;
}

.case-opinion-foot .sep {
  color: var(--ink-4);
  opacity: 0.7;
}

.case-reader {
  max-width: 68ch;
}

/* ── Mobile-friendly disclosure for sidebar ──────────────── */
.results-sidebar-mobile {
  display: none;
}

/* ── Breakpoints ─────────────────────────────────────────── */
@media (max-width: 960px) {
  .home-grid {
    grid-template-columns: minmax(0, 1fr);
    gap: 40px;
  }

  .results-grid {
    grid-template-columns: minmax(0, 1fr);
  }

  .results-sidebar {
    display: none;
  }

  /* Case detail: collapse rail above reading column */
  .case-grid {
    grid-template-columns: minmax(0, 1fr);
  }

  .case-rail {
    position: static;
    max-height: none;
    overflow: visible;
    border-right: 0;
    border-bottom: 1px solid var(--rule);
    padding: 22px 24px;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 22px 32px;
  }

  .case-rail>section {
    margin-top: 0 !important;
  }

  .case-main {
    padding: 24px 24px 40px;
  }

  .results-sidebar-mobile {
    display: block;
    border-bottom: 1px solid var(--rule);
    padding: 12px 20px;
    background: var(--paper);
  }

  .results-sidebar-mobile summary {
    cursor: pointer;
    font-family: var(--mono);
    font-size: 11px;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    color: var(--ink-3);
    list-style: none;
  }

  .results-sidebar-mobile summary::-webkit-details-marker {
    display: none;
  }

  .results-sidebar-mobile summary::after {
    content: "+";
    float: right;
    color: var(--ink-4);
  }

  .results-sidebar-mobile[open] summary::after {
    content: "−";
  }

  .results-sidebar-mobile .inner {
    margin-top: 14px;
    padding-bottom: 6px;
  }

  .results-main {
    padding: 20px 20px;
  }
}

@media (max-width: 720px) {
  .topbar {
    padding: 12px 18px;
    gap: 12px;
    flex-wrap: wrap;
  }

  .topbar-meta {
    display: none;
  }

  .topbar-brand small {
    display: none;
  }

  /* Case detail: tighten further */
  .case-rail {
    grid-template-columns: minmax(0, 1fr);
    padding: 18px 20px;
    gap: 22px;
  }

  .case-main {
    padding: 20px 20px 36px;
  }

  .case-crumb {
    padding: 10px 20px !important;
  }

  .case-opinion-head {
    gap: 10px;
    align-items: flex-start;
  }

  .case-opinion-switch {
    gap: 6px;
  }

  .case-reader p {
    font-size: 16px !important;
  }

  .footer {
    padding: 18px 20px;
    flex-direction: column;
    gap: 6px;
    align-items: flex-start;
    text-align: left;
  }

  /* Search field: stack input → mode tabs → submit */
  .search-shell {
    flex-wrap: wrap;
  }

  .search-shell-icon {
    width: 38px;
  }

  .search-shell input {
    flex: 1 1 60%;
    padding: 10px 12px;
    font-size: 16px;
    /* prevents iOS zoom */
  }

  .search-shell-mode {
    order: 3;
    width: 100%;
    border-left: 0;
    border-top: 1px solid var(--rule-soft);
    overflow-x: auto;
    flex-wrap: nowrap;
    justify-content: flex-start;
  }

  .search-shell-submit {
    order: 2;
    padding: 0 16px;
    min-height: 40px;
  }

  .mode-btn {
    white-space: nowrap;
    flex-shrink: 0;
  }

  /* Result row: shrink gutter + reflow */
  .result-row {
    grid-template-columns: 24px 1fr !important;
    padding: 16px 18px 14px !important;
    gap: 10px !important;
  }

  .result-row h3 {
    font-size: 17px !important;
  }

  .result-row p {
    font-size: 14px !important;
  }

  .score-strip {
    gap: 14px 18px;
  }

  /* Homepage padding tighter */
  .home-main {
    padding: 56px 20px 0 !important;
  }

  .home-h1 {
    font-size: 28px !important;
  }

  /* Results header wraps */
  .results-header {
    flex-direction: column;
    gap: 8px;
    align-items: flex-start !important;
  }
}

@media (max-width: 480px) {
  .home-h1 {
    font-size: 24px !important;
  }

  .stats-card {
    padding: 14px 14px 12px;
  }

  .home-main {
    padding: 40px 16px 0 !important;
  }
}