/* ─────────────────────────────────────────────────────────────────
   Ruleschat — site design system
   Shared tokens + reusable components used across all redesigned
   pages. Scoped to .site so the canvas chrome isn't affected.
   Tokens and component shapes follow the reference files in
   /design_handoff/files/ — those are canonical.
   ───────────────────────────────────────────────────────────────── */

.site {
  --paper: #F4EFE6;
  --paper-2: #ECE5D7;
  --paper-3: #E3DBC8;
  --ink: #1A1815;
  --ink-2: #3B3833;
  --muted: #6B6660;
  --muted-2: #8C857C;
  --hair: #D9D1C0;
  --hair-2: #E8E1D2;
  --accent: #8B2E2E;
  --accent-soft: #C56F6F;
  --accent-wash: #F2E3DE;
  --field: #4D5A3E;
  --field-soft: #8B9876;
  --brass: #B08B3A;
  --highlight: #FFF8E8;
  --pass: #4D6A3F;
  --review: #B08B3A;
  --fail: #8B2E2E;

  --serif: "Newsreader", ui-serif, Georgia, serif;
  --sans: "Source Sans 3", ui-sans-serif, system-ui, sans-serif;
  --mono: "JetBrains Mono", ui-monospace, "SF Mono", Menlo, monospace;

  background: var(--paper);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

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

.site a { color: inherit; text-decoration: none; }
.site a.inline-link {
  color: var(--accent);
  border-bottom: 1px solid color-mix(in oklch, var(--accent) 35%, transparent);
  transition: border-color .15s, color .15s;
}
.site a.inline-link:hover { border-bottom-color: var(--accent); }

.site ::selection { background: color-mix(in oklch, var(--accent) 25%, var(--paper)); }

/* ───── Wrapper / container ───── */
.site .wrap {
  max-width: 1180px;
  margin: 0 auto;
  padding: 0 32px;
  position: relative;
}
.site .wrap-narrow {
  max-width: 820px;
  margin: 0 auto;
  padding: 0 32px;
}

/* ───── Nav ───── */
/* `display: block` overrides Bootstrap's `.nav { display: flex }` from
   bootstrap.min.css; without this, .wrap.nav-inner becomes a flex item that
   shrinks to its content width and collapses the brand → links spacing. */
.site .nav {
  display: block;
  border-bottom: 1px solid var(--hair);
  background: color-mix(in oklch, var(--paper) 92%, transparent);
  backdrop-filter: blur(8px);
  position: sticky; top: 0; z-index: 50;
}
.site .nav-inner {
  display: flex; align-items: center; justify-content: space-between;
  height: 64px;
}
.site .brand {
  display: flex; align-items: center; gap: 12px;
  font-family: var(--serif);
  font-size: 18px;
  font-weight: 600;
  letter-spacing: .005em;
}
.site .brand-mark { width: 28px; height: 28px; display: grid; place-items: center; }
.site .brand-mark svg { width: 100%; height: 100%; }
.site .brand-name { display: flex; align-items: baseline; gap: 8px; white-space: nowrap; }
.site .brand-name em { font-style: italic; font-weight: 500; color: var(--accent); }
.site .nav-links {
  display: flex; align-items: center; gap: 28px;
  font-size: 14px;
  white-space: nowrap;
}
.site .nav-links a {
  color: var(--ink-2); padding: 6px 0;
  border-bottom: 1px solid transparent;
  transition: color .15s, border-color .15s;
}
.site .nav-links a:hover, .site .nav-links a.active { color: var(--ink); }
.site .nav-links a.active { border-bottom-color: var(--accent); }

/* nav CTA is ghost (transparent + ink border) per the reference files,
   hover fills to ink. Selectors qualified with `.nav-links a` to win
   specificity against the generic `.site .nav-links a` rule above, which
   otherwise rewrites the border-bottom and padding. */
.site .nav-links a.nav-cta {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 7px 14px;
  background: transparent; color: var(--ink);
  border: 1px solid var(--ink);
  border-radius: 2px;
  font-size: 13px; font-weight: 500;
  letter-spacing: .02em;
  white-space: nowrap;
  transition: background .15s, color .15s, border-color .15s;
}
.site .nav-links a.nav-cta:hover {
  background: var(--ink); color: var(--paper); border-color: var(--ink);
}
/* The active nav link rule adds an accent bottom-border; on the CTA we want
   the full ink frame to stay intact, so re-assert all four sides. */
.site .nav-links a.nav-cta.active { border-color: var(--ink); }
.site .nav-links a.nav-cta .arrow { font-family: var(--mono); transition: transform .15s; }
.site .nav-links a.nav-cta:hover .arrow { transform: translateX(2px); }

/* ───── Typography utilities ───── */
.site .eyebrow {
  display: inline-flex; align-items: center; gap: 10px;
  font-family: var(--mono);
  font-size: 11px; font-weight: 500;
  letter-spacing: .14em; text-transform: uppercase;
  color: var(--muted); margin-bottom: 18px;
  flex-wrap: wrap;
}
.site .eyebrow .dot {
  width: 6px; height: 6px; background: var(--accent); border-radius: 50%;
}
.site .eyebrow .num {
  font-variant-numeric: tabular-nums; color: var(--accent);
}
.site .h-display {
  font-family: var(--serif);
  font-weight: 500;
  font-size: clamp(40px, 5vw, 64px);
  line-height: 1.02;
  letter-spacing: -0.02em;
  text-wrap: balance;
  margin: 0;
}
.site .h-display em { font-style: italic; color: var(--accent); }
.site .h-section {
  font-family: var(--serif);
  font-weight: 500;
  font-size: clamp(28px, 3vw, 40px);
  line-height: 1.1;
  letter-spacing: -0.015em;
  margin: 0 0 24px;
  text-wrap: balance;
}
.site .h-section em { font-style: italic; color: var(--accent); }
.site .lede {
  font-size: 19px; line-height: 1.55;
  color: var(--ink-2); max-width: 580px; margin-bottom: 32px;
  text-wrap: pretty;
}
.site .prose p { font-size: 16px; line-height: 1.65; color: var(--ink-2); margin: 0 0 16px; text-wrap: pretty; }

/* ───── Buttons ───── */
.site .btn {
  display: inline-flex; align-items: center; gap: 10px;
  padding: 13px 20px;
  font-size: 14px; font-weight: 500;
  letter-spacing: .01em;
  border-radius: 2px;
  border: 1px solid transparent;
  cursor: pointer;
  transition: all .15s;
  font-family: var(--sans);
  background: transparent; color: var(--ink);
  white-space: nowrap;
  text-decoration: none;
}
.site .btn-primary { background: var(--ink); color: var(--paper); }
.site .btn-primary:hover { background: var(--accent); }
.site .btn-ghost { border-color: var(--ink); }
.site .btn-ghost:hover { background: var(--ink); color: var(--paper); }
.site .btn-sm { padding: 8px 14px; font-size: 13px; }
.site .btn-block { display: flex; justify-content: center; width: 100%; }
.site .btn .arrow { font-family: var(--mono); }

/* ───── Citation chip ───── */
.site .cite {
  display: inline-flex; align-items: center;
  padding: 1px 7px;
  font-family: var(--mono);
  font-size: 12px; font-weight: 500;
  color: var(--accent);
  background: color-mix(in oklch, var(--accent) 12%, var(--paper));
  border: 1px solid color-mix(in oklch, var(--accent) 35%, transparent);
  border-radius: 2px;
  cursor: pointer;
  transition: all .15s;
  margin: 0 1px;
  white-space: nowrap;
}
.site .cite:hover { background: var(--accent); color: var(--paper); }

/* ───── Card ───── */
.site .card-panel {
  background: color-mix(in oklch, var(--paper) 50%, white 50%);
  border: 1px solid var(--hair);
  border-radius: 4px;
  padding: 24px;
}
.site .card-shadow {
  box-shadow: 0 1px 0 var(--hair), 14px 14px 0 -1px var(--hair-2);
}

/* ───── Form ───── */
.site .field { display: block; margin-bottom: 18px; }
.site .field label {
  display: block;
  font-family: var(--mono);
  font-size: 11px; text-transform: uppercase; letter-spacing: .12em;
  color: var(--muted); margin-bottom: 8px; font-weight: 500;
}
.site .input, .site select.input, .site textarea.input {
  display: block; width: 100%;
  padding: 11px 14px;
  background: color-mix(in oklch, var(--paper) 50%, white 50%);
  border: 1px solid var(--hair);
  border-radius: 2px;
  font-family: var(--sans);
  font-size: 15px;
  color: var(--ink);
  outline: none;
  transition: border-color .15s, box-shadow .15s;
}
.site .input:focus {
  border-color: var(--ink);
  box-shadow: 0 0 0 3px color-mix(in oklch, var(--ink) 12%, transparent);
}

/* ───── Footer ───── */
.site .footer,
.site footer.site-footer {
  padding: 56px 0 40px;
  border-top: 1px solid var(--hair);
  font-size: 14px;
}
.site .footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 48px;
}
.site .footer-brand p {
  color: var(--muted);
  font-size: 13px; line-height: 1.6; margin: 12px 0 0; max-width: 360px;
}
.site .footer-col h5 {
  font-family: var(--mono);
  font-size: 10px;
  text-transform: uppercase;
  letter-spacing: .14em;
  color: var(--muted);
  font-weight: 600;
  margin: 0 0 14px;
}
.site .footer-col ul { list-style: none; padding: 0; margin: 0; display: grid; gap: 8px; }
.site .footer-col a { font-size: 14px; color: var(--ink-2); transition: color .15s; }
.site .footer-col a:hover { color: var(--accent); }
.site .legal {
  margin-top: 48px; padding-top: 22px;
  border-top: 1px solid var(--hair);
  font-family: var(--mono); font-size: 11px;
  color: var(--muted); line-height: 1.6;
  letter-spacing: .02em;
  display: flex; justify-content: space-between; gap: 32px;
}
.site .legal .right { text-align: right; }

/* ───── Section frame ───── */
.site .section {
  padding: 88px 0;
  border-bottom: 1px solid var(--hair);
}
.site .section.no-border { border-bottom: 0; }
.site .section.alt { background: var(--paper-2); }
.site .section.tight { padding: 56px 0; }

/* ─────────────────────────────────────────────────────────────────
   DEMO CHAT SURFACE
   Used on /demo (templates/demo.html). Follows Redesigned Demo.html.
   The same stack — banner, exp-notice, toolbar, scroll, dock — is also
   the basis for the authed full chat (ruleschat.html), which adds a
   sidebar.
   ───────────────────────────────────────────────────────────────── */

/* Demo banner — ink strip with question counter + login CTA */
.site .demo-banner {
  background: var(--ink); color: var(--paper);
  padding: 10px 0;
  border-bottom: 1px solid var(--ink);
  font-size: 13px;
}
.site .demo-banner .wrap {
  display: flex; align-items: center; justify-content: space-between;
  gap: 16px; flex-wrap: wrap;
}
.site .demo-banner .left { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; }
.site .demo-banner .dot {
  display: inline-block; width: 6px; height: 6px;
  background: var(--accent); border-radius: 50%;
}
.site .demo-banner .counter b {
  color: #E5C078;
  font-weight: 600;
  font-variant-numeric: tabular-nums;
}
.site .demo-banner .login-cta {
  font-family: var(--mono); font-size: 11px;
  letter-spacing: .1em; text-transform: uppercase;
  color: var(--paper); opacity: .75;
  border-bottom: 1px solid rgba(255,255,255,.3);
  padding-bottom: 2px;
  transition: opacity .15s, border-color .15s;
}
.site .demo-banner .login-cta:hover { opacity: 1; border-bottom-color: var(--accent-soft); }

/* Experimental notice — paper-2 strip */
.site .exp-notice {
  background: var(--paper-2);
  border-bottom: 1px solid var(--hair);
  padding: 8px 0;
  position: relative;
}
.site .exp-notice .wrap {
  display: flex; align-items: center; gap: 14px;
  font-size: 13px;
  color: var(--ink-2);
}
.site .exp-notice .label {
  font-family: var(--mono); font-size: 10px;
  letter-spacing: .14em; text-transform: uppercase;
  color: var(--accent); font-weight: 600;
}
.site .exp-notice .see-link {
  color: var(--ink); border-bottom: 1px solid var(--ink-2);
  font-size: 13px;
  transition: border-color .15s;
  cursor: pointer;
}
.site .exp-notice .see-link:hover { border-bottom-color: var(--accent); color: var(--accent); }
.site .exp-notice .dismiss {
  margin-left: auto;
  background: transparent; border: 0;
  cursor: pointer;
  color: var(--muted);
  font-size: 18px; line-height: 1;
  padding: 4px 8px;
}
.site .exp-notice .dismiss:hover { color: var(--ink); }

/* Toolbar — conversation title + model pill */
.site .chat-toolbar {
  display: flex; align-items: center; justify-content: space-between;
  padding: 14px 0;
  border-bottom: 1px solid var(--hair);
  background: var(--paper);
}
.site .chat-toolbar .wrap {
  display: flex; align-items: center; justify-content: space-between;
}
.site .chat-toolbar h4 {
  font-family: var(--serif); font-weight: 500; font-size: 19px;
  margin: 0; letter-spacing: -0.005em;
}
.site .chat-toolbar h4 em { font-style: italic; color: var(--accent); }
.site .model-pill {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 5px 10px;
  background: var(--paper-2); border: 1px solid var(--hair);
  border-radius: 2px;
  font-family: var(--mono); font-size: 11px;
  color: var(--ink-2);
  cursor: pointer;
  transition: border-color .15s;
}
.site .model-pill:hover { border-color: var(--ink-2); }
.site .model-pill .dot { width: 6px; height: 6px; border-radius: 50%; background: var(--field); }

/* Scroll area + messages */
.site .chat-scroll {
  flex: 1; overflow-y: auto;
  padding: 32px 0 24px;
  min-height: 0;
}
.site .chat-scroll .wrap { max-width: 820px; }

.site .welcome { padding: 32px 0; text-align: left; }
.site .welcome .h2 {
  font-family: var(--serif); font-weight: 500;
  font-size: clamp(28px, 3vw, 38px);
  line-height: 1.1;
  letter-spacing: -0.015em;
  margin: 0 0 14px;
  text-wrap: balance;
}
.site .welcome .h2 em { font-style: italic; color: var(--accent); }
.site .welcome .desc {
  color: var(--ink-2); font-size: 16px;
  margin: 0 0 28px; max-width: 580px;
  line-height: 1.6;
}
.site .welcome .prompt-list {
  display: grid; grid-template-columns: 1fr 1fr;
  gap: 12px;
  margin-top: 18px;
}
.site .welcome .prompt {
  text-align: left;
  border: 1px solid var(--hair);
  background: color-mix(in oklch, var(--paper) 50%, white 50%);
  padding: 14px 16px;
  border-radius: 2px;
  cursor: pointer;
  transition: border-color .15s, background .15s;
  font-family: var(--sans);
  width: 100%;
}
.site .welcome .prompt:hover { border-color: var(--ink-2); background: var(--paper); }
.site .welcome .prompt-meta {
  font-family: var(--mono); font-size: 10px;
  letter-spacing: .12em; text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 6px;
}
.site .welcome .prompt-q {
  font-family: var(--serif); font-style: italic;
  font-size: 15.5px; color: var(--ink);
  line-height: 1.4;
}

.site .msg { margin-bottom: 26px; }
.site .msg-meta {
  display: flex; align-items: baseline; gap: 12px;
  margin-bottom: 8px;
  font-family: var(--mono); font-size: 11px;
  letter-spacing: .1em; text-transform: uppercase;
  color: var(--muted);
  flex-wrap: wrap;
}
.site .msg.user .msg-meta { justify-content: flex-end; }
.site .msg.user .msg-bubble {
  max-width: 78%;
  margin-left: auto;
  background: var(--paper-2);
  border: 1px solid var(--hair);
  border-radius: 2px;
  padding: 14px 18px;
  font-size: 15px; color: var(--ink);
  line-height: 1.55;
}
.site .msg.assistant .msg-meta { color: var(--accent); }
.site .msg.assistant .msg-content { font-size: 15px; line-height: 1.65; color: var(--ink); }
.site .msg.assistant .msg-content p { margin: 0 0 12px; }
.site .msg.assistant .msg-content strong { color: var(--ink); font-weight: 600; }
.site .msg.assistant .msg-content ul,
.site .msg.assistant .msg-content ol { margin: 0 0 14px 18px; padding: 0; }
.site .msg.assistant .msg-content li { margin-bottom: 6px; }

.site .latency-row {
  display: flex; flex-wrap: wrap; gap: 18px;
  margin-top: 14px;
  padding-top: 12px;
  border-top: 1px dashed var(--hair);
  font-family: var(--mono); font-size: 11px;
  color: var(--muted); letter-spacing: .02em;
}
.site .latency-row .ll-num { color: var(--ink); font-weight: 600; }

/* Input dock */
.site .input-dock {
  border-top: 1px solid var(--hair);
  background: var(--paper);
  padding: 16px 0 20px;
}
.site .input-dock .wrap { max-width: 820px; }
.site .input-frame {
  display: flex; align-items: flex-end; gap: 10px;
  padding: 12px 14px;
  border: 1px solid var(--ink-2);
  border-radius: 2px;
  background: color-mix(in oklch, var(--paper) 50%, white 50%);
  transition: border-color .15s, box-shadow .15s;
}
.site .input-frame:focus-within {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px color-mix(in oklch, var(--accent) 12%, transparent);
}
.site .input-frame textarea {
  flex: 1; border: 0; outline: 0; background: transparent;
  resize: none; font-family: var(--sans);
  font-size: 15px; color: var(--ink); padding: 0;
  line-height: 1.55;
  max-height: 200px;
}
.site .send-btn {
  border: 0; background: var(--ink); color: var(--paper);
  font-size: 13px; font-weight: 500; letter-spacing: .02em;
  padding: 9px 16px; border-radius: 2px; cursor: pointer;
  font-family: var(--sans);
  transition: background .15s;
}
.site .send-btn:hover { background: var(--accent); }

.site .helper-strip {
  display: flex; align-items: center; gap: 14px;
  margin-top: 10px;
  font-family: var(--mono); font-size: 11px;
  color: var(--muted); letter-spacing: .02em;
  flex-wrap: wrap;
}
.site .helper-strip .surprise {
  border: 1px solid var(--hair);
  background: color-mix(in oklch, var(--paper) 50%, white 50%);
  color: var(--ink-2);
  font-family: var(--sans); font-size: 12px;
  padding: 5px 10px; border-radius: 2px; cursor: pointer;
  transition: border-color .15s;
}
.site .helper-strip .surprise:hover { border-color: var(--ink-2); }
.site .helper-strip .status {
  margin-left: auto;
  color: var(--field);
  display: flex; align-items: center; gap: 6px;
}
.site .helper-strip .status .pip {
  display: inline-block; width: 6px; height: 6px;
  border-radius: 50%; background: var(--field);
}

/* ─────────────────────────────────────────────────────────────────
   AUTH CHAT (Ruleschat full chat) — adds a sidebar of past convos
   on top of the demo chat surface. Keep these here so both chat
   pages share the same component vocabulary.
   ───────────────────────────────────────────────────────────────── */

.site .chat-canvas {
  display: grid;
  grid-template-columns: 280px 1fr;
  min-height: 0;
  flex: 1;
  overflow: hidden;
}
.site .chat-canvas.no-sidebar { grid-template-columns: 1fr; }
.site .chat-sidebar {
  border-right: 1px solid var(--hair);
  background: var(--paper-2);
  display: flex; flex-direction: column;
  overflow: hidden;
}
.site .chat-sidebar-header {
  padding: 18px 18px 12px;
  border-bottom: 1px solid var(--hair);
  display: flex; align-items: center; justify-content: space-between;
}
.site .chat-sidebar-header h5 {
  font-family: var(--mono); font-size: 10px; letter-spacing: .14em;
  text-transform: uppercase; color: var(--muted); margin: 0;
  font-weight: 600;
}
.site .new-chat-btn {
  border: 1px solid var(--ink); background: var(--ink); color: var(--paper);
  font-size: 12px; padding: 6px 10px; border-radius: 2px; cursor: pointer;
  font-family: var(--sans); letter-spacing: .02em;
}
.site .sidebar-list { padding: 8px; overflow-y: auto; flex: 1; }
.site .sidebar-item {
  padding: 10px 12px; border-radius: 2px;
  font-size: 13.5px; color: var(--ink-2); cursor: pointer;
  display: flex; align-items: baseline; gap: 8px;
  border: 1px solid transparent;
  margin-bottom: 2px;
}
.site .sidebar-item:hover { background: var(--paper-3); }
.site .sidebar-item.active {
  background: color-mix(in oklch, var(--accent) 10%, var(--paper));
  border-color: color-mix(in oklch, var(--accent) 30%, transparent);
}
.site .sidebar-item .when {
  font-family: var(--mono); font-size: 10px; color: var(--muted);
  letter-spacing: .04em;
}
.site .sidebar-item .title {
  font-size: 13px; line-height: 1.35;
  display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical;
  overflow: hidden; text-overflow: ellipsis;
}
.site .sidebar-section {
  font-family: var(--mono); font-size: 9.5px; letter-spacing: .14em;
  text-transform: uppercase; color: var(--muted-2);
  padding: 16px 12px 6px;
}

.site .chat-main { display: flex; flex-direction: column; min-height: 0; }

/* ───── Eval badges ───── */
.site .ev-badge {
  display: inline-flex; align-items: center; gap: 6px;
  font-family: var(--mono); font-size: 11px;
  font-weight: 500; letter-spacing: .08em;
  text-transform: uppercase;
  padding: 3px 8px;
  border-radius: 2px;
  border: 1px solid currentColor;
}
.site .ev-badge.pass    { color: var(--pass); background: color-mix(in oklch, var(--pass) 10%, var(--paper)); }
.site .ev-badge.review  { color: var(--review); background: color-mix(in oklch, var(--review) 10%, var(--paper)); }
.site .ev-badge.fail    { color: var(--fail); background: color-mix(in oklch, var(--fail) 10%, var(--paper)); }
.site .ev-badge .glyph { font-size: 12px; line-height: 1; }

.site .qtype-badge {
  display: inline-flex; align-items: center;
  font-family: var(--mono); font-size: 10px;
  font-weight: 500; letter-spacing: .12em; text-transform: uppercase;
  padding: 2px 6px;
  background: var(--paper-2); color: var(--ink-2);
  border: 1px solid var(--hair); border-radius: 2px;
}

/* ───── Misc utilities ───── */
.site .hairline { border: 0; border-top: 1px solid var(--hair); margin: 32px 0; }
.site .mono { font-family: var(--mono); }
.site .muted { color: var(--muted); }

/* ───── Responsive (system-wide) ─────
   Page templates layer their own @media rules on top of these. */
html, body { overflow-x: hidden; }

@media (max-width: 620px) {
  .site .wrap { padding: 0 20px; }
  .site .wrap-narrow { padding: 0 20px; }
  .site .section { padding: 56px 0; }
  /* Mobile nav: hide internal links so brand + CTA fit on one row.
     Hamburger drawer for the full menu is a future addition. */
  .site .nav-links a:not(.nav-cta) { display: none; }
  .site .nav-links a.nav-cta { padding: 7px 12px; font-size: 12px; }
  .site .footer-grid { grid-template-columns: 1fr; gap: 32px; }
  .site .legal { flex-direction: column; gap: 12px; }
}