/* reqproof.com site styles.
   Dossier aesthetic; typography defaults ratified via the mockup's Type Lab.
   Generated by scripts/build-website.py from website-mockup/assets/mock.css. */

:root {
  --base: 18.5px;          /* body font size */
  --scale: 1.3;         /* modular scale ratio */
  --measure: 90ch;       /* max line length for prose */
  --leading: 1.5;       /* body line-height */
  --hweight: 500;        /* heading weight */

  --font-serif: "Charter", "Iowan Old Style", "Palatino Linotype", Georgia, serif;
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --font-mono: ui-monospace, "SF Mono", SFMono-Regular, Menlo, Consolas, monospace;

  --font-body: var(--font-serif);
  --font-head: var(--font-sans);

  --ink: #1a1a1a;
  --ink-soft: #4a4a4a;
  --ink-faint: #8a8a8a;
  --paper: #fbfaf7;
  --paper-dim: #f1efe9;
  --line: #d8d5cc;
  --accent: #a03123;      /* auditor's red, used sparingly even in wireframe */

  --s1: calc(var(--base) * 0.5);
  --s2: calc(var(--base) * 1);
  --s3: calc(var(--base) * 1.75);
  --s4: calc(var(--base) * 3);
  --s5: calc(var(--base) * 5);
}

* { box-sizing: border-box; }
html {
  font-size: var(--base);
  /* clip alone is incomplete on some mobile WebKits; both stop page-level sideways scroll */
  overflow-x: clip;
  max-width: 100%;
}
body {
  margin: 0;
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: var(--leading);
  color: var(--ink);
  background: var(--paper);
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
  max-width: 100%;
}

/* ---------- modular scale ---------- */
h1, h2, h3, h4 { font-family: var(--font-head); font-weight: var(--hweight); line-height: 1.15; margin: 0 0 0.5em; }
h1 { font-size: calc(1rem * var(--scale) * var(--scale) * var(--scale) * var(--scale)); letter-spacing: -0.015em; }
h2 { font-size: calc(1rem * var(--scale) * var(--scale)); letter-spacing: -0.01em; }
h3 { font-size: calc(1rem * var(--scale)); }
h4 { font-size: 1rem; text-transform: uppercase; letter-spacing: 0.08em; font-size: 0.8rem; color: var(--ink-soft); }
.display { font-size: calc(1rem * var(--scale) * var(--scale) * var(--scale) * var(--scale) * var(--scale)); line-height: 1.05; text-wrap: balance; }
.display em { font-style: normal; color: var(--accent); }
small, .small { font-size: 0.85rem; }
.kicker { font-family: var(--font-mono); font-size: 0.75rem; text-transform: uppercase; letter-spacing: 0.14em; color: var(--accent); margin: 0 0 1em; }

p, ul, ol, blockquote { max-width: var(--measure); }
p { margin: 0 0 1em; }
.lede { font-size: calc(1rem * var(--scale)); line-height: 1.4; color: var(--ink-soft); }
a { color: inherit; text-decoration-color: var(--ink-faint); text-underline-offset: 3px; }
a:hover { text-decoration-color: var(--accent); }
code, .mono { font-family: var(--font-mono); font-size: 0.88em; }
pre {
  font-family: var(--font-mono); font-size: 0.82rem; line-height: 1.5;
  background: #141412; color: #e8e6df; padding: 1.2em 1.4em;
  overflow-x: auto; -webkit-overflow-scrolling: touch;
  border-radius: 4px;
  /* Never expand the page: cap to container, not the long prose measure */
  max-width: 100%;
  min-width: 0;
  white-space: pre;
  tab-size: 2;
}
pre .dim { color: #8a887f; }
pre .ok { color: #7fbf7f; }
pre .bad { color: #e07a6a; }
hr { border: 0; border-top: 1px solid var(--line); margin: var(--s4) 0; }
blockquote {
  margin: var(--s3) 0; padding: 0.2em 0 0.2em 1.2em;
  border-left: 3px solid var(--accent); font-style: italic; color: var(--ink-soft);
}
blockquote .attr { display: block; font-style: normal; font-family: var(--font-mono); font-size: 0.75rem; margin-top: 0.8em; color: var(--ink-faint); }

/* ---------- evidence screenshots ---------- */
figure.shot { margin: var(--s3) 0; max-width: calc(var(--measure) * 1.15); }
figure.shot img {
  display: block; width: 100%; height: auto;
  border: 1px solid var(--line); border-radius: 4px; background: #fff;
}
figure.shot figcaption {
  font-family: var(--font-sans); font-size: 0.8rem; line-height: 1.5;
  color: var(--ink-soft); margin-top: 0.7em; max-width: var(--measure);
}
.band-dark figure.shot img { border-color: #33322d; }
.band-dark figure.shot figcaption { color: #b8b5aa; }

/* ---------- hand-authored diagrams (inline SVG, dossier palette) ---------- */
figure.diagram {
  margin: var(--s3) 0; max-width: calc(var(--measure) * 1.15);
  --dg-ink: var(--ink);
  --dg-soft: var(--ink-soft);
  --dg-fill: var(--paper);
  --dg-accent: var(--accent);
}
figure.diagram svg { display: block; width: 100%; height: auto; }
.band-dark figure.diagram { --dg-ink: #e8e6df; --dg-soft: #b8b5aa; --dg-fill: #1d1d1a; --dg-accent: #e07a6a; }
.diagram .dg-box { fill: var(--dg-fill); stroke: var(--dg-ink); stroke-width: 1.5; }
.diagram .dg-name { font-family: var(--font-mono); font-size: 13px; font-weight: 700; letter-spacing: 0.08em; fill: var(--dg-ink); }
.diagram .dg-sub { font-family: var(--font-sans); font-size: 12px; fill: var(--dg-soft); }
.diagram .dg-arrow { stroke: var(--dg-ink); stroke-width: 1.5; fill: none; }
.diagram .dg-head { fill: var(--dg-ink); }
.diagram .dg-label { font-family: var(--font-mono); font-size: 12px; fill: var(--dg-soft); }
.diagram .dg-neg { stroke: var(--dg-accent); stroke-width: 1.5; stroke-dasharray: 6 5; fill: none; }
.diagram .dg-neghead { fill: var(--dg-accent); }
.diagram .dg-strike { stroke: var(--dg-accent); stroke-width: 2.5; }
.diagram .dg-neglabel { font-family: var(--font-mono); font-size: 12px; fill: var(--dg-accent); }

/* tabbed exhibit: without JavaScript the tab row stays hidden and all panels
   render stacked; with it, one panel shows at a time. */
.exhibit { margin: var(--s3) 0; max-width: calc(var(--measure) * 1.15); }
.exhibit figure.shot { margin: 0 0 var(--s2); }
.exhibit figure.shot[hidden] { display: none; }
.exhibit-tabs { display: flex; gap: 1.6em; flex-wrap: wrap; border-bottom: 1px solid var(--line); margin-bottom: var(--s2); }
.exhibit-tabs[hidden] { display: none; }
.exhibit-tabs [role="tab"] {
  font-family: var(--font-sans); font-size: 0.85rem; letter-spacing: 0.04em;
  background: none; border: 0; border-bottom: 2px solid transparent; border-radius: 0;
  padding: 0.5em 0.1em 0.6em; margin-bottom: -1px; color: var(--ink-soft); cursor: pointer;
}
.exhibit-tabs [role="tab"] .mono { font-size: 0.75rem; color: var(--ink-faint); margin-right: 0.45em; }
.exhibit-tabs [role="tab"]:hover { color: var(--ink); }
.exhibit-tabs [role="tab"] { position: relative; }
.exhibit-tabs [role="tab"][aria-selected="true"] { color: var(--ink); font-weight: 700; }
.exhibit-tabs [role="tab"][aria-selected="true"]::after {
  content: ""; position: absolute; left: 0; bottom: -1px; height: 2px;
  width: 100%; background: var(--accent);
}
/* While auto-advance runs, the active underline is the timer: it grows over
   the rotation interval (keep the animation duration in sync with site.js). */
.exhibit-auto .exhibit-tabs [role="tab"][aria-selected="true"]::after {
  width: 0; animation: tab-progress 5s linear forwards;
}
@keyframes tab-progress { from { width: 0; } to { width: 100%; } }
@media (prefers-reduced-motion: reduce) {
  .exhibit-auto .exhibit-tabs [role="tab"][aria-selected="true"]::after { animation: none; width: 100%; }
}
.exhibit-live { font-family: var(--font-sans); color: var(--ink-soft); margin: 0; }
.band-dark .exhibit-tabs { border-bottom-color: #33322d; }
.band-dark .exhibit-tabs [role="tab"] { color: #b8b5aa; }
.band-dark .exhibit-tabs [role="tab"] .mono { color: #8a887f; }
.band-dark .exhibit-tabs [role="tab"]:hover { color: #e8e6df; }
.band-dark .exhibit-tabs [role="tab"][aria-selected="true"] { color: #e8e6df; }
.band-dark .exhibit-live { color: #b8b5aa; }
@media (prefers-reduced-motion: no-preference) {
  .exhibit figure.shot:not([hidden]) { animation: exhibit-fade 0.4s ease; }
  @keyframes exhibit-fade { from { opacity: 0; } to { opacity: 1; } }
}

/* ---------- layout ---------- */
.wrap {
  max-width: 1080px;
  margin: 0 auto;
  padding: 0 var(--s3);
  /* contain full-bleed children so they can't widen the document */
  overflow-x: clip;
}
section { padding: var(--s4) 0; border-top: 1px solid var(--line); }
section.hero {
  border-top: 0;
  padding: var(--s5) 0 0;
  display: flex;
  flex-direction: column;
  gap: 0;
}

/* Hero: claim (copy + CTAs) then system (cards) as distinct acts */
.hero-claim { padding-bottom: var(--s3); min-width: 0; }
.hero-claim .lede { margin-bottom: 0; }
.hero-system {
  margin: 0 calc(-1 * var(--s3));
  padding: var(--s3) var(--s3) var(--s4);
  background: var(--paper-dim);
  border-top: 1px solid var(--line);
  min-width: 0;
}
.cta-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.75rem 1rem;
  margin-top: 1.5em;
}
.hero-footnote {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  line-height: 1.55;
  color: var(--ink-faint);
  max-width: var(--measure);
  margin: var(--s3) 0 0;
  overflow-wrap: anywhere;
}

/* Full-bleed bands: break out of .wrap to the viewport edges while
   keeping inner content aligned with the wrap measure.
   Use 100% + relative pull instead of bare 100vw on small screens
   (100vw + calc(50% - 50vw) is a common iOS horizontal-scroll bug). */
.band,
.band-dark {
  width: 100vw;
  max-width: 100vw;
  margin-left: calc(50% - 50vw);
  margin-right: calc(50% - 50vw);
  padding-left: max(var(--s3), calc(50vw - 540px + var(--s3)));
  padding-right: max(var(--s3), calc(50vw - 540px + var(--s3)));
  box-sizing: border-box;
  overflow-x: auto; /* pre/code scroll inside the band, not the page */
  -webkit-overflow-scrolling: touch;
}
.band { background: var(--paper-dim); border-top-color: var(--line); }
.band-dark {
  background: #141412;
  color: #e8e6df;
  border-top-color: #2a2924;
}
.band-dark h2, .band-dark h3 { color: #f5f3ec; }
.band-dark .lede { color: #b8b5aa; }
.band-dark .secnum { color: #8a887f; }
.band-dark a { text-decoration-color: #5a584f; }
.band-dark a:hover { text-decoration-color: #e07a6a; }

.cols { display: grid; gap: var(--s3); min-width: 0; }
.cols > * { min-width: 0; } /* let pre/grid children shrink instead of expand page */
.cols-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.cols-3 { grid-template-columns: repeat(auto-fit, minmax(min(240px, 100%), 1fr)); }
/* Force three equal columns for stat strips (avoids a dangling third card). */
.cols-3.stats-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.card {
  border: 1px solid var(--line);
  padding: var(--s2) var(--s3);
  background: var(--paper);
  border-radius: 3px;
  display: flex;
  flex-direction: column;
  transition: border-color 0.15s ease, box-shadow 0.15s ease;
}
.card:hover {
  border-color: #c4c0b4;
  box-shadow: 0 1px 0 rgba(26, 26, 26, 0.04);
}
.card .card-num {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  color: var(--ink-faint);
  margin: 0 0 0.45em;
}
.card .card-num.stat {
  font-size: 1.85rem;
  font-weight: 600;
  letter-spacing: -0.02em;
  color: var(--ink);
  line-height: 1.1;
}
.card h3 { margin-bottom: 0.4em; }
.card > p:last-child { margin-bottom: 0; flex: 1; }
.band-dark .card { background: #1d1d1a; border-color: #33322d; }
.band-dark .card:hover { border-color: #4a4840; box-shadow: none; }
.band-dark .card .card-num { color: #8a887f; }

/* section numbering, dossier-style */
.secnum { font-family: var(--font-mono); font-size: 0.75rem; color: var(--ink-faint); display: block; margin-bottom: 0.6em; }

/* ---------- wireframe placeholders ---------- */
.placeholder {
  border: 1.5px dashed var(--ink-faint); border-radius: 4px;
  padding: var(--s3); text-align: center; color: var(--ink-faint);
  font-family: var(--font-mono); font-size: 0.8rem; background: repeating-linear-gradient(
    45deg, transparent, transparent 12px, rgba(0,0,0,0.02) 12px, rgba(0,0,0,0.02) 24px);
}

/* ---------- buttons / CTAs ---------- */
.btn {
  display: inline-block; font-family: var(--font-sans); font-size: 0.95rem; font-weight: 600;
  padding: 0.7em 1.5em; border: 2px solid var(--ink); background: var(--ink); color: var(--paper);
  text-decoration: none; border-radius: 3px; cursor: pointer;
}
.btn.secondary { background: transparent; color: var(--ink); }
.btn.nav-cta {
  font-size: 0.8rem;
  font-weight: 600;
  padding: 0.45em 0.95em;
  margin-left: 0.35em;
  border-width: 1.5px;
  white-space: nowrap;
}
.band-dark .btn { border-color: #e8e6df; background: #e8e6df; color: #141412; }
.band-dark .btn.secondary { background: transparent; color: #e8e6df; }
.btn:focus-visible, a:focus-visible, button:focus-visible { outline: 3px solid var(--accent); outline-offset: 2px; }

/* ---------- nav / footer ---------- */
.site-nav-wrap {
  position: sticky;
  top: 0;
  z-index: 40;
  background: var(--paper);
  background: color-mix(in srgb, var(--paper) 92%, transparent);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line);
}
.site-nav {
  display: flex;
  align-items: center;
  gap: 1.15em;
  flex-wrap: nowrap;
  padding: 0.95em var(--s3);
  font-family: var(--font-sans);
  font-size: 0.85rem;
  max-width: 1080px;
  margin: 0 auto;
  position: relative;
}
.site-nav .brand {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 1rem;
  letter-spacing: 0.02em;
  margin-right: auto;
  text-decoration: none;
  color: var(--ink);
  flex: none;
  z-index: 2;
}
.site-nav .brand em { font-style: normal; color: var(--accent); }

/* Desktop: links in a row. Mobile: panel becomes a dropdown (see media query). */
.site-nav-panel {
  display: flex;
  align-items: center;
  gap: 1.15em;
  flex-wrap: nowrap;
}
.site-nav-panel a {
  flex: none;
  white-space: nowrap;
  text-decoration: none;
  color: var(--ink-soft);
  padding-bottom: 2px;
}
.site-nav-panel a:hover { color: var(--ink); }
.site-nav-panel a.active {
  color: var(--ink);
  font-weight: 700;
  border-bottom: 2px solid var(--accent);
}
.site-nav-panel a.btn.nav-cta {
  color: var(--paper);
  border-bottom: none;
  padding-bottom: 0.45em;
  margin-left: 0.15em;
}
.site-nav-panel a.btn.nav-cta:hover {
  color: var(--paper);
  text-decoration: none;
}

/* Hamburger — hidden on desktop; checkbox drives open state without JS */
.nav-cb {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}
.nav-toggle {
  display: none;
  flex: none;
  z-index: 2;
  align-items: center;
  justify-content: center;
  gap: 0.45rem;
  min-width: 2.75rem;
  height: 2.75rem;
  margin: -0.4rem -0.35rem -0.4rem 0;
  padding: 0 0.65rem;
  border: 1px solid var(--line);
  border-radius: 4px;
  background: var(--paper);
  color: var(--ink);
  cursor: pointer;
  font-family: var(--font-sans);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  user-select: none;
}
.nav-toggle:hover { border-color: var(--ink-faint); }
.nav-toggle-text { line-height: 1; }
.nav-toggle-box {
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 1.15rem;
}
.nav-toggle-bar {
  display: block;
  height: 2px;
  width: 100%;
  background: var(--ink);
  border-radius: 1px;
  transition: transform 0.18s ease, opacity 0.18s ease;
}
.nav-cb:checked ~ .nav-toggle .nav-toggle-bar:nth-child(1),
.site-nav-wrap.is-open .nav-toggle-bar:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}
.nav-cb:checked ~ .nav-toggle .nav-toggle-bar:nth-child(2),
.site-nav-wrap.is-open .nav-toggle-bar:nth-child(2) {
  opacity: 0;
}
.nav-cb:checked ~ .nav-toggle .nav-toggle-bar:nth-child(3),
.site-nav-wrap.is-open .nav-toggle-bar:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}
.site-footer {
  border-top: 1px solid var(--line);
  margin-top: var(--s5);
  padding: var(--s3) var(--s3) var(--s4);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--ink-faint);
  max-width: 1080px;
  margin-left: auto;
  margin-right: auto;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}
.site-footer-top {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 1.25rem;
  justify-content: space-between;
  align-items: baseline;
}
.site-footer-brand {
  color: var(--ink-soft);
  white-space: nowrap;
}
.site-footer-copy {
  flex: none;
  white-space: nowrap;
}
.site-footer-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem 1rem;
  align-items: baseline;
  padding-top: 0.15rem;
  border-top: 1px solid var(--line);
}
.site-footer-nav a {
  white-space: nowrap;
  text-decoration: none;
  color: var(--ink-soft);
  border-bottom: 1px solid transparent;
}
.site-footer-nav a:hover {
  color: var(--ink);
  border-bottom-color: var(--ink-faint);
  text-decoration: none;
}

/* ---------- lead form (contract fields kept) ---------- */
.lead-form { max-width: 560px; display: grid; gap: 0.9em; font-family: var(--font-sans); }
.lead-form label { font-size: 0.8rem; font-weight: 600; text-transform: uppercase; letter-spacing: 0.06em; color: var(--ink-soft); display: block; margin-bottom: 0.3em; }
.lead-form input, .lead-form select, .lead-form textarea {
  width: 100%; font: inherit; font-size: 0.95rem; padding: 0.6em 0.8em;
  border: 1px solid var(--ink-faint); border-radius: 3px; background: #fff; color: var(--ink);
}
[data-form-note] { font-size: 0.8rem; color: var(--ink-soft); font-family: var(--font-sans); }

/* Hamburger nav: phone + narrow tablet — desktop stays a single row */
@media (max-width: 900px) {
  .site-nav {
    flex-wrap: wrap;
    gap: 0;
    padding: 0.65rem 1.1rem;
  }
  .nav-toggle { display: inline-flex; }
  .site-nav-panel {
    display: none;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    width: 100%;
    flex-basis: 100%;
    order: 3;
    padding: 0.35rem 0 0.75rem;
    border-top: 1px solid var(--line);
    margin-top: 0.65rem;
  }
  .nav-cb:checked ~ .site-nav-panel,
  .site-nav-wrap.is-open .site-nav-panel {
    display: flex;
  }
  .site-nav-panel a {
    display: block;
    padding: 0.85rem 0.15rem;
    border-bottom: 1px solid var(--line);
    white-space: normal;
  }
  .site-nav-panel a.active {
    border-bottom-color: var(--line);
    box-shadow: inset 3px 0 0 var(--accent);
    padding-left: 0.55rem;
  }
  .site-nav-panel a.btn.nav-cta {
    display: block;
    width: 100%;
    text-align: center;
    margin: 0.85rem 0 0;
    padding: 0.75em 1em;
    border: 2px solid var(--ink);
    border-radius: 3px;
    box-shadow: none;
  }
  .site-nav-panel a.btn.nav-cta.active {
    padding-left: 1em;
  }
  body.nav-open {
    overflow: hidden;
  }
}

@media (max-width: 700px) {
  :root { --base: 16px; --s3: 1.1rem; --s4: 2.25rem; --s5: 2.75rem; }

  .wrap { padding: 0 1.1rem; overflow-x: clip; }

  /* Drop 100vw full-bleed on small screens — bleed only to wrap edges */
  .band,
  .band-dark {
    width: auto;
    max-width: none;
    margin-left: -1.1rem;
    margin-right: -1.1rem;
    padding-left: 1.1rem;
    padding-right: 1.1rem;
    overflow-x: auto;
  }

  .hero-system {
    margin-left: -1.1rem;
    margin-right: -1.1rem;
    padding-left: 1.1rem;
    padding-right: 1.1rem;
  }

  /* Headline was ~3.7rem and dominated the phone viewport */
  .display {
    font-size: calc(1rem * var(--scale) * var(--scale) * var(--scale) * 1.05);
    line-height: 1.08;
    overflow-wrap: break-word;
  }
  h1 {
    font-size: calc(1rem * var(--scale) * var(--scale) * 1.15);
  }
  .lede {
    font-size: 1.05rem;
    line-height: 1.45;
  }

  section.hero { padding-top: var(--s4); }

  .cols-2,
  .cols-3,
  .cols-3.stats-3 { grid-template-columns: 1fr; }

  pre {
    font-size: 0.72rem;
    padding: 0.9em 1em;
    max-width: 100%;
  }

  /* CTAs stack full-width so they don't feel cramped under the lede */
  .cta-row {
    flex-direction: column;
    align-items: stretch;
  }
  .cta-row .btn {
    text-align: center;
    width: 100%;
  }

  figure.shot,
  figure.diagram,
  .exhibit {
    max-width: 100%;
  }

  .site-footer { padding-left: 1.1rem; padding-right: 1.1rem; }
  .site-footer-top { flex-direction: column; gap: 0.35rem; }
  .site-footer-brand, .site-footer-copy { white-space: normal; }

  table.limits {
    display: block;
    width: 100%;
    max-width: 100%;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
  }
}

@media (prefers-reduced-motion: reduce) {
  .card { transition: none; }
}