/* ============================================================================
   VerifIQ — Design System (verifiq-system.css)
   The shared foundation: design tokens, base typography, the "atelier paper"
   surface, the reusable label/heading utilities and the two CTA buttons.

   Loaded by: index, about, case-study-01, cad-library, 404
   Companion:  verifiq-cad.css (finding / document-quote / severity components)
   ========================================================================== */

@import url('https://fonts.googleapis.com/css2?family=Playfair+Display:ital,wght@0,400;0,500;0,600;1,400;1,500&family=Inter:wght@300;400;500;600;700&family=JetBrains+Mono:wght@400;500&display=swap');

/* ── Design tokens ───────────────────────────────────────────────────────── */
:root {
  /* Surfaces — warm archival paper */
  --bone:      #F5F1EB;   /* page background */
  --paper:     #FBF8F3;   /* raised panels */
  --vellum:    #EBE4D8;   /* tinted sections */

  /* Ink */
  --ink:       #1A1A1F;   /* primary text / rules */
  --ink-soft:  #45454E;   /* body text */
  --graphite:  #6E6E77;   /* secondary labels */
  --draft:     #92929B;   /* muted / pending */

  /* Accents — six pigments, mixed sparingly */
  --brass:     #A07C35;   /* the house accent */
  --sanguine:  #8C2B27;   /* critical */
  --amber:     #B26A22;   /* high */
  --olive:     #7C6B2C;   /* medium */
  --moss:      #4E6B38;   /* low / positive */

  /* Type */
  --font-serif: 'Playfair Display', Georgia, 'Times New Roman', serif;
  --font-sans:  'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-mono:  'JetBrains Mono', ui-monospace, 'SF Mono', Menlo, monospace;
}

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

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  background: var(--bone);
  color: var(--ink);
  font-family: var(--font-sans);
  font-weight: 400;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

a { color: inherit; text-decoration: none; }

img { max-width: 100%; display: block; }

h1, h2, h3, h4 { font-family: var(--font-serif); font-weight: 500; }

/* Subtle drawn-paper grain laid over the bone background. */
.paper-texture {
  background-color: var(--bone);
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='160' height='160'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='2' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='0.025'/%3E%3C/svg%3E");
}

/* ── Typographic utilities ───────────────────────────────────────────────── */

/* Small monospaced eyebrow, e.g. "— Drawing 12 · About" */
.t-eyebrow {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  font-weight: 500;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--brass);
}

/* Quiet monospaced metadata caption */
.t-meta {
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  font-weight: 400;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--graphite);
}

/* Serif sub-heading */
.t-h2 {
  font-family: var(--font-serif);
  font-weight: 500;
  font-size: clamp(1.5rem, 2.6vw, 2.1rem);
  line-height: 1.15;
  color: var(--ink);
  margin: 0;
}

/* Reading body */
.t-body {
  font-family: var(--font-sans);
  font-size: 1rem;
  line-height: 1.7;
  color: var(--ink-soft);
  margin: 0;
}

/* Tabular figures for register codes / counts */
.tab-num { font-variant-numeric: tabular-nums; }

/* ── CTA · sheet tag ─────────────────────────────────────────────────────────
   <a class="btn-sheet-tag"><span class="sheet-code">A-001</span>
     <span class="sheet-label">Return to atelier <span class="sheet-arrow"></span></span></a> */
.btn-sheet-tag {
  display: inline-flex;
  align-items: stretch;
  border: 1px solid var(--ink);
  background: var(--paper);
  transition: background 0.18s ease, color 0.18s ease;
}
.btn-sheet-tag .sheet-code {
  display: flex;
  align-items: center;
  padding: 11px 13px;
  background: var(--ink);
  color: var(--bone);
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  font-weight: 500;
  letter-spacing: 0.14em;
}
.btn-sheet-tag .sheet-label {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 11px 16px;
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  font-weight: 500;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--ink);
}
.btn-sheet-tag .sheet-arrow::before { content: "→"; }
.btn-sheet-tag:hover { background: var(--ink); }
.btn-sheet-tag:hover .sheet-label { color: var(--bone); }

/* ── CTA · leader line ───────────────────────────────────────────────────────
   <a class="btn-leader"><span class="leader-num">01</span>
     <span class="leader-line"></span><span class="leader-label">Request the brief</span></a> */
.btn-leader {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  font-weight: 500;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--ink);
}
.btn-leader .leader-num { color: var(--brass); }
.btn-leader .leader-line {
  width: 36px;
  height: 1px;
  background: var(--ink);
  transition: width 0.22s ease;
}
.btn-leader:hover .leader-line { width: 56px; }
.btn-leader .leader-label { border-bottom: 1px solid var(--ink); padding-bottom: 2px; }

/* ── Shared site chrome (header / footer / layout) ───────────────────────────
   Defaults shared by every page so the site reads as one system. Pages may
   still override locally via their own inline <style>. */
.wrap { max-width: 1080px; margin: 0 auto; padding: 0 32px; }
.wrap-narrow { max-width: 780px; margin: 0 auto; padding: 0 32px; }

.top-nav { position: sticky; top: 0; z-index: 50; background: rgba(245,241,235,0.92); backdrop-filter: blur(8px); border-bottom: 1px solid var(--ink); }
.top-nav .inner { display: flex; align-items: center; justify-content: space-between; gap: 16px; padding: 16px 0; }
.wordmark { font-family: var(--font-serif); font-weight: 600; font-size: 1.4rem; letter-spacing: 0.06em; color: var(--ink); border-bottom: 0; }
.nav-links { display: none; gap: 28px; }
.nav-links a { font-family: var(--font-mono); font-size: 0.6875rem; letter-spacing: 0.18em; text-transform: uppercase; color: var(--graphite); }
.nav-links a:hover { color: var(--ink); }
@media (min-width: 860px) { .nav-links { display: flex; } }
.site-cta { font-family: var(--font-mono); font-size: 0.6875rem; letter-spacing: 0.18em; text-transform: uppercase; color: var(--ink); border-bottom: 1px solid var(--ink); white-space: nowrap; }

/* Locked-disclaimer block — required in every page footer (spec 08). */
.locked-block { padding: 48px 0; border-top: 1px solid var(--ink); border-bottom: 1px solid var(--ink); background: var(--paper); text-align: center; }
.locked-block .lb-text { font-family: var(--font-serif); font-style: italic; font-size: 1rem; line-height: 1.7; color: var(--ink); max-width: 60ch; margin: 14px auto 0; padding: 0 20px; }

.site-footer { padding: 36px 0 40px; background: var(--ink); color: var(--bone); }
.site-footer .foot-row { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 16px; max-width: 1080px; margin: 0 auto; padding: 0 32px; font-family: var(--font-mono); font-size: 0.6875rem; letter-spacing: 0.2em; text-transform: uppercase; color: var(--vellum); }
.site-footer a { color: var(--vellum); }
.site-footer a:hover { border-bottom: 1px solid var(--graphite); }

/* Accessibility — visible keyboard focus (WCAG 2.4.7). */
:focus-visible { outline: 2px solid var(--brass); outline-offset: 2px; }

/* ════════════════════════════════════════════════════════════════════════════
   THE ISSUED SET — the site behaves like a drawing set that has been read.
   Sheet chrome (title block, sheet drawer), drafting gestures (dimension rules,
   leader lines, revision clouds, stamps) and the live-review document fragment.
   Companion logic: verifiq-atelier.js
   ════════════════════════════════════════════════════════════════════════════ */

/* Page navigations cross-fade like turning a sheet (no-op where unsupported). */
@view-transition { navigation: auto; }
@media (prefers-reduced-motion: reduce) {
  ::view-transition-old(root), ::view-transition-new(root) { animation: none; }
}

/* The cursor over any quoted document becomes a drafting crosshair. */
.source-quote, .doc-frag { cursor: crosshair; }

/* ── Dimension-rule divider ──────────────────────────────────────────────────
   <div class="dim-rule" data-label="§ 02 · validation"></div>
   A measured drafting line between sections: end ticks + centred annotation. */
.dim-rule {
  position: relative;
  display: flex;
  align-items: center;
  gap: 14px;
  max-width: 1080px;
  margin: 0 auto;
  padding: 26px 32px;
}
.dim-rule::before, .dim-rule::after {
  content: "";
  flex: 1;
  height: 1px;
  background: var(--ink);
}
.dim-rule .dim-label {
  font-family: var(--font-mono);
  font-size: 0.625rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--graphite);
  white-space: nowrap;
}
/* end ticks — the short perpendicular strokes of a dimension line */
.dim-rule .dim-tick {
  width: 1px; height: 12px; background: var(--ink); flex: none;
}

/* ── Sheet title block ───────────────────────────────────────────────────────
   Injected by verifiq-atelier.js before the footer, from <body data-sheet …>.
   Reads like the bottom-right corner of an issued drawing. */
.title-block {
  max-width: 1080px;
  margin: 0 auto;
  padding: 40px 32px 48px;
  display: flex;
  justify-content: flex-end;
}
.title-block .tb {
  display: grid;
  grid-template-columns: auto auto;
  border: 1px solid var(--ink);
  background: var(--paper);
  font-family: var(--font-mono);
  font-size: 0.625rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  min-width: 300px;
}
.title-block .tb > div { padding: 8px 14px; border-top: 1px solid var(--ink); }
.title-block .tb > div:nth-child(-n+2) { border-top: 0; }
.title-block .tb > div:nth-child(odd) { color: var(--graphite); border-right: 1px solid var(--ink); }
.title-block .tb > div:nth-child(even) { color: var(--ink); }
.title-block .tb .tb-proj {
  grid-column: 1 / -1;
  font-family: var(--font-serif);
  font-size: 1rem;
  letter-spacing: 0.06em;
  text-transform: none;
  color: var(--ink);
  border-right: 0 !important;
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 18px;
}
.title-block .tb .tb-proj .tb-sheetno { font-family: var(--font-mono); font-size: 0.8125rem; letter-spacing: 0.14em; color: var(--brass); }

/* ── Mobile sheet drawer ─────────────────────────────────────────────────────
   Below 860px the nav links vanish; the drawer is the drawing index. */
.nav-toggle {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: none;
  border: 1px solid var(--ink);
  padding: 8px 12px;
  font-family: var(--font-mono);
  font-size: 0.625rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--ink);
  cursor: pointer;
}
@media (min-width: 860px) { .nav-toggle { display: none; } }
.sheet-drawer {
  display: none;
  border-bottom: 1px solid var(--ink);
  background: var(--paper);
}
.sheet-drawer.open { display: block; }
.sheet-drawer .sd-head {
  font-family: var(--font-mono); font-size: 0.625rem; letter-spacing: 0.22em;
  text-transform: uppercase; color: var(--graphite);
  padding: 14px 32px 6px;
}
.sheet-drawer a {
  display: flex; align-items: baseline; gap: 16px;
  padding: 12px 32px;
  border-top: 1px solid rgba(26,26,31,0.12);
  font-family: var(--font-mono); font-size: 0.75rem; letter-spacing: 0.12em;
  text-transform: uppercase; color: var(--ink);
}
.sheet-drawer a .sd-code { color: var(--brass); min-width: 56px; }
.sheet-drawer a:hover { background: var(--vellum); }
@media (min-width: 860px) { .sheet-drawer { display: none !important; } }

/* ── Rubber-stamp CTA press ──────────────────────────────────────────────────
   Applied to .btn-sheet-tag / .site-cta by the JS (class .stampable). */
.stampable { transition: transform 0.12s ease, box-shadow 0.12s ease; }
.stampable:active {
  transform: rotate(-1deg) scale(0.97);
  box-shadow: 0 0 0 3px rgba(140,43,39,0.12);
}

/* Footer RECEIVED date stamp (injected). */
footer, .site-footer { position: relative; }
.received-stamp {
  position: absolute;
  right: 28px;
  bottom: 18px;
  transform: rotate(-6deg);
  border: 2px solid rgba(235,228,216,0.4);
  border-radius: 4px;
  padding: 6px 12px;
  font-family: var(--font-mono);
  font-size: 0.5625rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: rgba(235,228,216,0.5);
  pointer-events: none;
  text-align: center;
  line-height: 1.7;
}
@media (max-width: 720px) { .received-stamp { display: none; } }

/* ── Revision cloud ──────────────────────────────────────────────────────────
   .rev-cloud gets a hand-wobbled checker's cloud drawn round it by the JS. */
.rev-cloud { position: relative; display: inline-block; padding: 10px 16px; }
.rev-cloud svg.cloud {
  position: absolute; inset: 0; width: 100%; height: 100%;
  overflow: visible; pointer-events: none;
}
.rev-cloud svg.cloud path {
  fill: none; stroke: var(--sanguine); stroke-width: 1.4;
  stroke-linecap: round; opacity: 0.85;
}

/* ── Scroll reveal (subtle; only when JS arms it) ───────────────────────────── */
.reveal-armed { opacity: 0; transform: translateY(12px); }
.reveal-in { opacity: 1; transform: none; transition: opacity 0.55s ease, transform 0.55s ease; }
@media (prefers-reduced-motion: reduce) {
  .reveal-armed { opacity: 1; transform: none; }
}

/* ── Document fragment · the hero live review ────────────────────────────────
   A paper artifact of the Form of Tender being read in front of the visitor. */
.doc-frag {
  position: relative;
  margin: 0;
  border: 1px solid var(--ink);
  background: var(--paper);
  box-shadow: 6px 6px 0 rgba(26,26,31,0.06);
}
.doc-frag .df-head {
  padding: 10px 18px;
  border-bottom: 1px solid var(--ink);
  font-family: var(--font-mono); font-size: 0.5625rem; letter-spacing: 0.18em;
  text-transform: uppercase; color: var(--graphite);
  display: flex; justify-content: space-between; gap: 12px; flex-wrap: wrap;
}
.doc-frag .df-body { padding: 22px 22px 48px; position: relative; }
.doc-frag .df-line {
  font-family: var(--font-serif);
  font-size: 0.9375rem; line-height: 1.9; color: var(--ink-soft); margin: 0;
}
.doc-frag .df-line .df-clause { color: var(--graphite); font-family: var(--font-mono); font-size: 0.6875rem; letter-spacing: 0.08em; margin-right: 8px; }
.doc-frag .df-blank {
  letter-spacing: 0.08em; color: var(--ink);
  border-bottom: 1px solid transparent;
  transition: background 0.3s ease;
}
.doc-frag.df-found .df-blank { background: rgba(140,43,39,0.1); box-shadow: 0 2px 0 var(--sanguine); }
/* the scanning bar that sweeps the fragment */
.doc-frag .df-scan {
  position: absolute; left: 0; right: 0; top: 0; height: 34px;
  background: linear-gradient(to bottom, rgba(160,124,53,0), rgba(160,124,53,0.12), rgba(160,124,53,0));
  opacity: 0; pointer-events: none;
}
.doc-frag.df-scanning .df-scan { opacity: 1; transition: top 1.6s linear; }
/* leader line drawn from the blank to the finding tag */
.doc-frag svg.df-leader {
  position: absolute; inset: 0; width: 100%; height: 100%;
  overflow: visible; pointer-events: none;
}
.doc-frag svg.df-leader path {
  fill: none; stroke: var(--brass); stroke-width: 1.3;
}
.doc-frag svg.df-leader circle { fill: var(--brass); }
/* the stamped finding tag */
.doc-frag .df-tag {
  position: absolute; right: 18px; bottom: 12px;
  display: inline-flex; align-items: center; gap: 8px;
  opacity: 0;
  font-family: var(--font-mono); font-size: 0.625rem; letter-spacing: 0.14em; color: var(--sanguine);
}
.doc-frag .df-tag.stamped {
  opacity: 1;
  animation: df-stamp 0.32s cubic-bezier(0.2, 1.6, 0.45, 1) both;
}
@keyframes df-stamp {
  0%   { transform: scale(1.7) rotate(-7deg); opacity: 0; }
  60%  { transform: scale(0.94) rotate(-2deg); opacity: 1; }
  100% { transform: scale(1) rotate(-2.5deg); opacity: 1; }
}
/* the typed register line beneath the fragment */
.doc-frag .df-finding {
  display: block;
  border-top: 1px solid var(--ink);
  padding: 14px 18px 16px;
  min-height: 3.2em;
  font-family: var(--font-mono); font-size: 0.6875rem; line-height: 1.7;
  letter-spacing: 0.04em; color: var(--ink);
  background: var(--bone);
}
.doc-frag .df-finding .df-cursor {
  display: inline-block; width: 7px; height: 1em; vertical-align: text-bottom;
  background: var(--brass);
  animation: df-blink 0.85s step-end infinite;
}
@keyframes df-blink { 50% { opacity: 0; } }
.doc-frag .df-finding { padding-right: 110px; }
.doc-frag .df-replay {
  position: absolute; bottom: 10px; right: 12px;
  background: none; border: 0; cursor: pointer;
  font-family: var(--font-mono); font-size: 0.5625rem; letter-spacing: 0.18em;
  text-transform: uppercase; color: var(--draft);
}
.doc-frag .df-replay:hover { color: var(--brass); }
@media (prefers-reduced-motion: reduce) {
  .doc-frag .df-tag { animation: none !important; }
  .doc-frag .df-finding .df-cursor { animation: none; }
}

/* ── Findings register controls (case study) ─────────────────────────────────
   Severity pills that filter the register live. */
.reg-controls {
  position: sticky; top: 57px; z-index: 40;
  display: flex; align-items: center; gap: 10px; flex-wrap: wrap;
  padding: 12px 0;
  background: rgba(245,241,235,0.94);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--ink);
}
.reg-controls .rc-label {
  font-family: var(--font-mono); font-size: 0.625rem; letter-spacing: 0.2em;
  text-transform: uppercase; color: var(--graphite); margin-right: 4px;
}
.reg-controls button.sev { cursor: pointer; opacity: 0.45; }
.reg-controls button.sev.active { opacity: 1; box-shadow: 2px 2px 0 rgba(26,26,31,0.18); }
.finding.reg-hidden { display: none; }
/* hovering a finding redlines its source quote, like a checker's pen */
.finding:hover .source-quote { border-left-color: var(--sanguine); }
.finding:hover .source-quote { text-decoration: underline; text-decoration-color: rgba(140,43,39,0.45); text-underline-offset: 3px; }

/* ── Request-the-brief dialog ────────────────────────────────────────────────
   Progressive: posts to a configured endpoint, else composes the mail. */
dialog.brief-dialog {
  border: 1px solid var(--ink);
  background: var(--paper);
  color: var(--ink);
  padding: 0;
  max-width: 480px;
  width: calc(100vw - 48px);
}
dialog.brief-dialog::backdrop { background: rgba(26,26,31,0.45); }
.brief-dialog .bd-head {
  display: flex; justify-content: space-between; align-items: center;
  padding: 16px 22px; border-bottom: 1px solid var(--ink);
}
.brief-dialog .bd-head .t-eyebrow { color: var(--brass); }
.brief-dialog .bd-close { background: none; border: 0; cursor: pointer; font-family: var(--font-mono); font-size: 0.75rem; color: var(--graphite); }
.brief-dialog form { padding: 20px 22px 24px; display: grid; gap: 14px; }
.brief-dialog label {
  display: grid; gap: 6px;
  font-family: var(--font-mono); font-size: 0.625rem; letter-spacing: 0.18em;
  text-transform: uppercase; color: var(--graphite);
}
.brief-dialog input, .brief-dialog textarea {
  border: 1px solid var(--ink); background: var(--bone); color: var(--ink);
  font-family: var(--font-serif); font-size: 0.9375rem; padding: 10px 12px;
}
.brief-dialog textarea { min-height: 84px; resize: vertical; }
.brief-dialog .bd-send {
  justify-self: start;
  border: 1px solid var(--ink); background: var(--ink); color: var(--bone);
  font-family: var(--font-mono); font-size: 0.6875rem; letter-spacing: 0.2em;
  text-transform: uppercase; padding: 12px 18px; cursor: pointer;
}
.brief-dialog .bd-send:hover { background: var(--brass); border-color: var(--brass); }
.brief-dialog .bd-note { font-family: var(--font-mono); font-size: 0.5625rem; letter-spacing: 0.12em; text-transform: uppercase; color: var(--draft); }