/* =========================================================================
   iWroteThat — wrotethat.com
   Material Design 3 structure + iWroteThat forensic brand skin.
   Tokens named by M3 role. Fonts: Instrument Serif / DM Sans / JetBrains Mono.
   Semantic color LOCK: green/red/cyan/amber ONLY on evidence chips/data.
   ========================================================================= */

/* ---------- M3 design tokens (LIGHT base) ---------- */
:root {
  /* primary = ink (buttons, headlines) */
  --md-sys-color-primary: #0f172a;
  --md-sys-color-on-primary: #ffffff;
  --md-sys-color-primary-container: #e2e8f0;
  --md-sys-color-on-primary-container: #0f172a;

  /* secondary = cyan (forensic data: links, FIG rules, motif strokes) */
  --md-sys-color-secondary: #06b6d4;
  --md-sys-color-secondary-container: #cffafe;
  --md-sys-color-on-secondary-container: #055160;

  /* tertiary = green (VERIFIED / human, reserved for evidence) */
  --md-sys-color-tertiary: #059669;
  --md-sys-color-tertiary-container: #d1fae5;
  --md-sys-color-on-tertiary-container: #065f46;

  /* error = red (EXTERNAL / pasted, reserved for evidence) */
  --md-sys-color-error: #dc2626;
  --md-sys-color-error-container: #fee2e2;
  --md-sys-color-on-error-container: #7f1d1d;

  /* amber = rare "irregular" only */
  --md-sys-color-amber: #d97706;

  /* surfaces */
  --md-sys-color-surface: #ffffff;
  --md-sys-color-surface-dim: #f1f5f9;
  --md-sys-color-surface-container-low: #f8fafc;
  --md-sys-color-surface-container: #f1f5f9;
  --md-sys-color-surface-container-high: #e8edf3;
  --md-sys-color-surface-container-highest: #e2e8f0;

  --md-sys-color-on-surface: #0f172a;
  --md-sys-color-on-surface-variant: #475569;
  --md-sys-color-outline: #cbd5e1;
  --md-sys-color-outline-variant: #e2e8f0;

  /* inverse role values (used by .surface-inverse scope) */
  --md-sys-color-inverse-surface: #0f172a;
  --md-sys-color-inverse-surface-container: #1e293b;
  --md-sys-color-inverse-on-surface: #f1f5f9;
  --md-sys-color-inverse-on-surface-variant: #94a3b8;

  /* hero/dark-scope evidence colors (brighter for dark bg) */
  --md-sys-color-hero-cyan: #22d3ee;
  --md-sys-color-hero-green: #34d399;
  --md-sys-color-hero-red: #f87171;

  /* state-layer opacities (Material) */
  --md-state-hover: 0.08;
  --md-state-focus: 0.10;
  --md-state-pressed: 0.12;

  /* motion */
  --md-motion-emphasized: cubic-bezier(0.2, 0, 0, 1);
  --md-motion-standard: cubic-bezier(0.2, 0, 0, 1);

  /* layout */
  --layout-max: 1200px;
  --layout-gutter: 24px;

  /* active "surface" role pointers (swapped inside .surface-inverse) */
  --surface: var(--md-sys-color-surface);
  --on-surface: var(--md-sys-color-on-surface);
  --on-surface-variant: var(--md-sys-color-on-surface-variant);
  --outline: var(--md-sys-color-outline);
}

/* ---------- inverse scope: hero, footer, privacy header ---------- */
.surface-inverse {
  --surface: var(--md-sys-color-inverse-surface);
  --on-surface: var(--md-sys-color-inverse-on-surface);
  --on-surface-variant: var(--md-sys-color-inverse-on-surface-variant);
  --outline: rgba(148, 163, 184, 0.24);
  background: var(--md-sys-color-inverse-surface);
  color: var(--md-sys-color-inverse-on-surface);
}

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

html { scroll-behavior: smooth; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
}

body {
  margin: 0;
  font-family: "DM Sans", system-ui, sans-serif;
  font-weight: 400;
  font-size: 16px;
  line-height: 1.625; /* 26 */
  color: var(--on-surface);
  background: var(--surface);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

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

a { color: inherit; }

::selection {
  background: var(--md-sys-color-secondary-container);
  color: var(--md-sys-color-on-secondary-container);
}

/* ---------- type scale (M3 roles) ---------- */
.display-large,
.display-medium,
.display-small,
.headline-large,
.headline-medium,
.headline-small {
  font-family: "Instrument Serif", Georgia, "Times New Roman", serif;
  font-weight: 400; /* never faux-bold */
  margin: 0;
}

.display-large { font-size: clamp(2.25rem, 5.5vw, 4rem); line-height: 1.02; letter-spacing: -0.015em; }
.display-medium { font-size: 3rem; line-height: 1.08; letter-spacing: -0.01em; }
.display-small { font-size: clamp(2rem, 4vw, 2.25rem); line-height: 1.16; }

.headline-large { font-size: clamp(1.75rem, 3.5vw, 2.125rem); line-height: 1.18; }
.headline-medium { font-size: clamp(1.5rem, 3vw, 1.75rem); line-height: 1.2; }
.headline-small { font-size: 1.5rem; line-height: 1.25; }

.title-large { font-family: "DM Sans", system-ui, sans-serif; font-weight: 600; font-size: 1.375rem; line-height: 1.27; margin: 0; }
.title-medium { font-family: "DM Sans", system-ui, sans-serif; font-weight: 600; font-size: 1rem; line-height: 1.5; margin: 0; }
.title-small { font-family: "DM Sans", system-ui, sans-serif; font-weight: 600; font-size: 0.875rem; line-height: 1.43; margin: 0; }

.body-large { font-size: 1.125rem; line-height: 1.555; }
.body-medium { font-size: 1rem; line-height: 1.625; }
.body-small { font-size: 0.875rem; line-height: 1.571; }

/* mono labels — JetBrains Mono, uppercase, never pure ink (gray or cyan) */
.label-large,
.label-medium,
.label-small {
  font-family: "JetBrains Mono", ui-monospace, "Cascadia Code", monospace;
  font-weight: 500;
  text-transform: uppercase;
  color: var(--on-surface-variant);
  margin: 0;
}
.label-large { font-size: 0.875rem; line-height: 1.43; letter-spacing: 0.5px; }
.label-medium { font-size: 0.75rem; line-height: 1.33; letter-spacing: 0.8px; }
.label-small { font-size: 0.6875rem; line-height: 1.45; letter-spacing: 1px; }

.mono-cyan { color: var(--md-sys-color-secondary); }
.surface-inverse .mono-cyan { color: var(--md-sys-color-hero-cyan); }

/* ---------- layout helpers ---------- */
.container {
  width: 100%;
  max-width: var(--layout-max);
  margin-inline: auto;
  padding-inline: var(--layout-gutter);
}

.section {
  padding-block: clamp(64px, 9vw, 120px);
  position: relative;
}

.surface-default { background: var(--md-sys-color-surface); }
.surface-dim { background: var(--md-sys-color-surface-dim); }

.section-overline {
  display: inline-flex;
  align-items: center;
  gap: 0.6em;
  margin-bottom: 1rem;
}
.section-overline::before {
  content: "";
  width: 28px;
  height: 1px;
  background: var(--md-sys-color-secondary);
}

.section-head { max-width: 60ch; margin-bottom: clamp(2rem, 4vw, 3.5rem); }
.section-head .body-large { color: var(--on-surface-variant); margin-top: 1rem; }

/* ---------- skip link / a11y ---------- */
.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  z-index: 100;
  background: var(--md-sys-color-primary);
  color: var(--md-sys-color-on-primary);
  padding: 0.75rem 1rem;
  font-family: "JetBrains Mono", ui-monospace, monospace;
  font-size: 0.8125rem;
  text-decoration: none;
}
.skip-link:focus { left: 1rem; top: 1rem; }

:where(a, button, [tabindex]):focus-visible {
  outline: 2px solid var(--md-sys-color-secondary);
  outline-offset: 2px;
  border-radius: 2px;
}
.surface-inverse :where(a, button):focus-visible {
  outline-color: var(--md-sys-color-hero-cyan);
}

/* ---------- logo lockup ---------- */
.logo-lockup {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  text-decoration: none;
  color: inherit;
}
.logo-lockup .fp-glyph { width: 28px; height: 28px; flex: none; }
.logo-lockup .wordmark {
  font-family: "Instrument Serif", Georgia, serif;
  font-weight: 400;
  font-size: 1.375rem;
  letter-spacing: -0.01em;
  color: inherit;
}

/* ---------- top nav ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
}
.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 64px;
}
.nav-links {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  list-style: none;
  margin: 0;
  padding: 0;
}
.nav-links a {
  font-family: "JetBrains Mono", ui-monospace, monospace;
  font-size: 0.75rem;
  letter-spacing: 0.8px;
  text-transform: uppercase;
  text-decoration: none;
  color: var(--on-surface-variant);
  padding: 0.65rem 0.75rem;
  border-radius: 8px;
  min-height: 44px;
  display: inline-flex;
  align-items: center;
  position: relative;
}
.nav-links a:hover {
  color: var(--on-surface);
  background: color-mix(in srgb, currentColor 8%, transparent);
}
@media (max-width: 599px) {
  .nav-links .nav-secondary { display: none; }
}

/* ===================== BUTTONS (8px squared, ink — NEVER green/red/cyan) ===================== */
.btn {
  --btn-fg: var(--md-sys-color-on-primary);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.55rem;
  min-height: 48px;
  padding: 0 1.5rem;
  border: 0;
  border-radius: 8px;           /* squared, not pill */
  font-family: "JetBrains Mono", ui-monospace, monospace;
  font-weight: 500;
  font-size: 0.875rem;
  letter-spacing: 0.5px;
  text-transform: uppercase;
  text-decoration: none;
  cursor: pointer;
  position: relative;
  isolation: isolate;
  transition: background-color 200ms var(--md-motion-standard),
              color 200ms var(--md-motion-standard),
              transform 200ms var(--md-motion-standard);
  -webkit-tap-highlight-color: transparent;
}
.btn::after { /* state layer */
  content: "";
  position: absolute;
  inset: 0;
  border-radius: inherit;
  background: currentColor;
  opacity: 0;
  z-index: -1;
  transition: opacity 200ms var(--md-motion-standard);
  pointer-events: none;
}
.btn:hover::after { opacity: var(--md-state-hover); }
.btn:focus-visible::after { opacity: var(--md-state-focus); }
.btn:active::after { opacity: var(--md-state-pressed); }

/* Filled = ink primary */
.btn--filled {
  background: var(--md-sys-color-primary);
  color: var(--md-sys-color-on-primary);
}
.btn--filled::after { background: var(--md-sys-color-on-primary); }

/* On dark scope, filled inverts to a light slab so it reads on ink */
.surface-inverse .btn--filled {
  background: var(--md-sys-color-inverse-on-surface);
  color: var(--md-sys-color-primary);
}
.surface-inverse .btn--filled::after { background: var(--md-sys-color-primary); }

/* Tonal = secondary-container tint (chrome, not data — using container surface, not pure cyan text) */
.btn--tonal {
  background: var(--md-sys-color-surface-container-highest);
  color: var(--md-sys-color-on-surface);
}
.btn--tonal::after { background: var(--md-sys-color-on-surface); }

/* Outlined = 1px outline, ink label */
.btn--outlined {
  background: transparent;
  color: var(--md-sys-color-on-surface);
  box-shadow: inset 0 0 0 1px var(--md-sys-color-outline);
}
.btn--outlined::after { background: var(--md-sys-color-on-surface); }
.surface-inverse .btn--outlined {
  color: var(--md-sys-color-inverse-on-surface);
  box-shadow: inset 0 0 0 1px rgba(148,163,184,0.5);
}
.surface-inverse .btn--outlined::after { background: var(--md-sys-color-inverse-on-surface); }

/* Text button = cyan label is allowed ONLY here as a link-class action (data/forensic accent),
   per brief §Components "Text (cyan label)". This is a link affordance, not chrome. */
.btn--text {
  background: transparent;
  min-height: 48px;
  padding-inline: 0.75rem;
  color: var(--md-sys-color-secondary);
}
.btn--text::after { background: var(--md-sys-color-secondary); border-radius: 8px; }
.btn--text:hover { text-decoration: underline; text-underline-offset: 4px; }
.surface-inverse .btn--text { color: var(--md-sys-color-hero-cyan); }
.surface-inverse .btn--text::after { background: var(--md-sys-color-hero-cyan); }

.btn--success {
  background: var(--md-sys-color-tertiary) !important;
  color: #fff !important;
}
.btn--success::after { background: #fff !important; }

.cta-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.75rem 1rem;
  margin-top: 2rem;
}

/* ===================== HERO (A) ===================== */
.hero {
  position: relative;
  overflow: hidden;
  min-height: 88vh;
  display: flex;
  align-items: center;
  /* faint grid texture over ink — NEVER a gradient */
  background-color: var(--md-sys-color-inverse-surface);
  background-image:
    linear-gradient(rgba(148,163,184,0.06) 1px, transparent 1px),
    linear-gradient(90deg, rgba(148,163,184,0.06) 1px, transparent 1px);
  background-size: 48px 48px;
}
.hero .container {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: clamp(2rem, 5vw, 4.5rem);
  align-items: center;
  padding-block: clamp(72px, 10vw, 120px);
  position: relative;
  z-index: 2;
}
.hero-copy .display-large { margin: 0.5rem 0 0; color: var(--md-sys-color-inverse-on-surface); }
.hero-copy .body-large { color: var(--md-sys-color-inverse-on-surface-variant); margin-top: 1.5rem; max-width: 46ch; }

/* hero fingerprint watermark — ONE large low-opacity cyan, bleeds off edge */
.hero-watermark {
  position: absolute;
  right: -10%;
  bottom: -18%;
  width: min(720px, 70vw);
  height: auto;
  opacity: 0.07;
  z-index: 1;
  pointer-events: none;
}
.hero-watermark path { stroke: var(--md-sys-color-hero-cyan); }

@media (max-width: 839px) {
  .hero .container { grid-template-columns: 1fr; }
  .hero { min-height: auto; }
  .hero-evidence { order: 2; }
}

/* ===================== EVIDENCE CARD (panel replica) ===================== */
.evidence-card {
  background: var(--md-sys-color-inverse-surface-container);
  border-radius: 16px;
  padding: 0;
  overflow: hidden;
  box-shadow: 0 1px 2px rgba(0,0,0,0.3), 0 1px 3px 1px rgba(0,0,0,0.15);
  color: var(--md-sys-color-inverse-on-surface);
  border: 1px solid rgba(148,163,184,0.14);
  transition: transform 200ms var(--md-motion-standard), box-shadow 200ms var(--md-motion-standard);
}
.evidence-card:hover {
  transform: translateY(-2px);
  box-shadow: 0 2px 4px rgba(0,0,0,0.35), 0 3px 8px 2px rgba(0,0,0,0.2);
}
.evidence-card__bar {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.85rem 1.1rem;
  border-bottom: 1px solid rgba(148,163,184,0.16);
}
.evidence-card__bar .fp-seal { width: 22px; height: 22px; flex: none; }
.evidence-card__bar .panel-title {
  font-family: "Instrument Serif", Georgia, serif;
  font-size: 1.125rem;
  color: var(--md-sys-color-inverse-on-surface);
}
.evidence-card__bar .exhibit-stamp {
  margin-left: auto;
  color: var(--md-sys-color-hero-cyan);
}
.evidence-card__fig {
  display: flex;
  align-items: center;
  gap: 0.6em;
  padding: 0.85rem 1.1rem 0.4rem;
  color: var(--md-sys-color-inverse-on-surface-variant);
}
.evidence-card__fig::after {
  content: "";
  flex: 1;
  height: 1px;
  background: var(--md-sys-color-hero-cyan);
  opacity: 0.4;
}

.evidence-counts {
  display: flex;
  gap: 1.5rem;
  padding: 0.4rem 1.1rem 1rem;
  border-bottom: 1px solid rgba(148,163,184,0.16);
}
.count-block .count-num {
  font-family: "JetBrains Mono", ui-monospace, monospace;
  font-weight: 500;
  font-size: 1.75rem;
  line-height: 1;
}
.count-block .count-num.is-evidence { color: var(--md-sys-color-hero-green); }
.count-block .count-num.is-total { color: var(--md-sys-color-inverse-on-surface); }
.count-block .count-label { margin-top: 0.4rem; }

.evidence-rows { list-style: none; margin: 0; padding: 0.4rem 0; }
.evidence-rows li {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.6rem 1.1rem;
}
.evidence-rows .row-origin {
  font-family: "JetBrains Mono", ui-monospace, monospace;
  font-size: 0.75rem;
  letter-spacing: 0.6px;
  text-transform: uppercase;
  color: var(--md-sys-color-inverse-on-surface-variant);
  flex: 1;
  min-width: 0;
}
.evidence-rows .row-count {
  font-family: "JetBrains Mono", ui-monospace, monospace;
  font-size: 0.8125rem;
  color: var(--md-sys-color-inverse-on-surface);
}

/* chips — the ONLY place green/red/cyan/amber meaning lives */
.chip {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-family: "JetBrains Mono", ui-monospace, monospace;
  font-weight: 500;
  font-size: 0.6875rem;
  letter-spacing: 0.6px;
  text-transform: uppercase;
  padding: 0.25rem 0.55rem;
  border-radius: 6px;
  white-space: nowrap;
}
.chip svg { width: 12px; height: 12px; }

/* dark-scope chips */
.surface-inverse .chip--verified,
.evidence-card .chip--verified {
  background: rgba(52, 211, 153, 0.16);
  color: var(--md-sys-color-hero-green);
  box-shadow: inset 0 0 0 1px rgba(52,211,153,0.4);
}
.surface-inverse .chip--external,
.evidence-card .chip--external {
  background: rgba(248, 113, 113, 0.16);
  color: var(--md-sys-color-hero-red);
  box-shadow: inset 0 0 0 1px rgba(248,113,113,0.4);
}
.surface-inverse .chip--data,
.evidence-card .chip--data {
  background: rgba(34, 211, 238, 0.14);
  color: var(--md-sys-color-hero-cyan);
  box-shadow: inset 0 0 0 1px rgba(34,211,238,0.4);
}

/* light-scope chips (the §C exhibit card) */
.chip--verified {
  background: var(--md-sys-color-tertiary-container);
  color: var(--md-sys-color-on-tertiary-container);
}
.chip--external {
  background: var(--md-sys-color-error-container);
  color: var(--md-sys-color-on-error-container);
}
.chip--data {
  background: var(--md-sys-color-secondary-container);
  color: var(--md-sys-color-on-secondary-container);
}

.evidence-card__disclaimer {
  padding: 0.85rem 1.1rem 1.1rem;
  border-top: 1px solid rgba(148,163,184,0.16);
  color: var(--md-sys-color-inverse-on-surface-variant);
  font-size: 0.8125rem;
  line-height: 1.5;
}

/* ===================== HOW IT WORKS (B) ===================== */
.method-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.25rem;
  position: relative;
}
/* chain-of-custody connector rule (desktop only) */
.method-grid::before {
  content: "";
  position: absolute;
  top: 56px;
  left: 12%;
  right: 12%;
  height: 1px;
  background: var(--md-sys-color-secondary);
  opacity: 0.35;
  z-index: 0;
}
.method-card {
  position: relative;
  z-index: 1;
  background: var(--md-sys-color-surface-container);
  border: 1px solid var(--md-sys-color-outline-variant);
  border-radius: 16px;
  padding: 1.75rem 1.5rem;
  transition: transform 200ms var(--md-motion-standard), box-shadow 200ms var(--md-motion-standard);
}
.method-card:hover {
  transform: translateY(-2px);
  box-shadow: 0 1px 2px rgba(15,23,42,0.12), 0 2px 6px rgba(15,23,42,0.08);
}
.method-card .step-icon {
  width: 40px; height: 40px;
  color: var(--md-sys-color-secondary);
  margin-bottom: 1rem;
}
.method-card .step-icon svg { width: 100%; height: 100%; }
.method-card .step-label { margin-bottom: 0.6rem; }
.method-card .title-large { margin-bottom: 0.6rem; }
.method-card .body-medium { color: var(--on-surface-variant); }

@media (max-width: 839px) {
  .method-grid { grid-template-columns: 1fr; }
  .method-grid::before { display: none; }
}

/* ===================== THE EXHIBIT (C) ===================== */
.exhibit-layout {
  display: grid;
  grid-template-columns: 7fr 5fr;
  gap: clamp(2rem, 5vw, 4rem);
  align-items: center;
}
.exhibit-copy .headline-medium { margin-bottom: 1rem; }
.exhibit-copy p { color: var(--on-surface-variant); margin: 0 0 1rem; }
.exhibit-copy p:last-child { margin-bottom: 0; }

/* the §C card is the same component on a light recessed surface but keeps the
   panel-faithful dark body (consistency payoff) */
.exhibit-card { max-width: 520px; }

@media (max-width: 839px) {
  .exhibit-layout { grid-template-columns: 1fr; }
  .exhibit-card { order: -1; }
}

/* ===================== NOT-A-DETECTOR (D) ===================== */
.stance {
  max-width: 680px;
  margin-inline: auto;
  text-align: center;
}
.stance .fp-seal {
  width: 44px; height: 44px;
  margin: 0 auto 1.5rem;
}
.stance .fp-seal path { stroke: var(--md-sys-color-secondary); }
.stance-card {
  background: var(--md-sys-color-surface);
  border: 1px solid var(--md-sys-color-outline);
  border-radius: 16px;
  padding: clamp(2rem, 5vw, 3.5rem);
}
.stance-card .headline-medium { margin-bottom: 1.25rem; }
.stance-card .body-large { color: var(--on-surface-variant); }
.stance-card .overline-center { justify-content: center; margin-bottom: 1.5rem; }

/* ===================== FINAL CTA (E) ===================== */
.final-cta {
  text-align: center;
  background-color: var(--md-sys-color-inverse-surface);
  background-image:
    linear-gradient(rgba(148,163,184,0.06) 1px, transparent 1px),
    linear-gradient(90deg, rgba(148,163,184,0.06) 1px, transparent 1px);
  background-size: 48px 48px;
}
.final-cta .display-small { color: var(--md-sys-color-inverse-on-surface); max-width: 20ch; margin-inline: auto; }
.final-cta .cta-row { justify-content: center; }
.final-cta .cta-note { color: var(--md-sys-color-inverse-on-surface-variant); margin-top: 1rem; }

/* ===================== FOOTER (F) ===================== */
.site-footer {
  background: var(--md-sys-color-inverse-surface);
  color: var(--md-sys-color-inverse-on-surface);
  padding-block: 4rem 2.5rem;
}
.footer-divider {
  display: flex;
  align-items: center;
  gap: 1rem;
  color: var(--md-sys-color-inverse-on-surface-variant);
  margin-bottom: 3rem;
}
.footer-divider::after {
  content: "";
  flex: 1;
  height: 1px;
  background: rgba(148,163,184,0.24);
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1fr;
  gap: 2rem;
}
.footer-brand .logo-lockup { margin-bottom: 1rem; }
.footer-brand .footer-tagline {
  color: var(--md-sys-color-inverse-on-surface-variant);
  max-width: 30ch;
}
.footer-col h3 { margin: 0 0 1rem; color: var(--md-sys-color-hero-cyan); }
.footer-col ul { list-style: none; margin: 0; padding: 0; }
.footer-col li { margin-bottom: 0.65rem; }
.footer-col a {
  color: var(--md-sys-color-inverse-on-surface-variant);
  text-decoration: none;
  font-size: 0.9375rem;
}
.footer-col a:hover { color: var(--md-sys-color-inverse-on-surface); text-decoration: underline; text-underline-offset: 3px; }
.footer-bottom {
  margin-top: 3rem;
  padding-top: 1.5rem;
  border-top: 1px solid rgba(148,163,184,0.18);
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1rem;
  color: var(--md-sys-color-inverse-on-surface-variant);
}

@media (max-width: 839px) {
  .footer-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 599px) {
  .footer-grid { grid-template-columns: 1fr; }
}

/* ===================== /privacy page ===================== */
.privacy-header {
  padding-block: 3rem;
}
.privacy-header .container { position: relative; }
.privacy-header .fp-seal {
  width: 36px; height: 36px;
  margin-bottom: 1.25rem;
}
.privacy-header .fp-seal path { stroke: var(--md-sys-color-hero-cyan); }
.privacy-header .display-small,
.privacy-header .headline-large { color: var(--md-sys-color-inverse-on-surface); margin-top: 0.5rem; }
.privacy-header .effective-date { margin-top: 1rem; }
.privacy-header .effective-date .date-slot {
  color: var(--md-sys-color-hero-cyan);
  background: rgba(34,211,238,0.12);
  padding: 0.1rem 0.45rem;
  border-radius: 4px;
}

.privacy-layout {
  display: grid;
  grid-template-columns: 220px minmax(0, 720px);
  gap: clamp(2rem, 5vw, 4rem);
  max-width: 1040px;
  margin-inline: auto;
  padding-block: clamp(48px, 7vw, 80px);
  padding-inline: var(--layout-gutter);
}

/* sticky anchor nav (Expanded+) */
.privacy-nav {
  position: sticky;
  top: 88px;
  align-self: start;
  max-height: calc(100vh - 120px);
  overflow-y: auto;
}
.privacy-nav .nav-heading { margin-bottom: 1rem; color: var(--md-sys-color-secondary); }
.privacy-nav ul { list-style: none; margin: 0; padding: 0; }
.privacy-nav a {
  display: block;
  font-family: "JetBrains Mono", ui-monospace, monospace;
  font-size: 0.75rem;
  letter-spacing: 0.6px;
  text-transform: uppercase;
  color: var(--on-surface-variant);
  text-decoration: none;
  padding: 0.55rem 0.75rem;
  border-left: 2px solid transparent;
  line-height: 1.35;
}
.privacy-nav a:hover {
  color: var(--on-surface);
  background: color-mix(in srgb, var(--md-sys-color-secondary) 8%, transparent);
}
.privacy-nav a.is-active {
  color: var(--md-sys-color-on-secondary-container);
  border-left-color: var(--md-sys-color-secondary);
  background: color-mix(in srgb, var(--md-sys-color-secondary) 8%, transparent);
}

/* mobile disclosure */
.privacy-nav-mobile { display: none; margin-bottom: 2rem; }
.privacy-nav-mobile summary {
  font-family: "JetBrains Mono", ui-monospace, monospace;
  font-size: 0.8125rem;
  text-transform: uppercase;
  letter-spacing: 0.6px;
  cursor: pointer;
  padding: 0.85rem 1rem;
  min-height: 48px;
  display: flex;
  align-items: center;
  background: var(--md-sys-color-surface-container);
  border-radius: 8px;
  color: var(--on-surface-variant);
}
.privacy-nav-mobile ul { list-style: none; margin: 0.5rem 0 0; padding: 0; }
.privacy-nav-mobile a {
  display: block;
  padding: 0.6rem 1rem;
  font-family: "JetBrains Mono", ui-monospace, monospace;
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--on-surface-variant);
  text-decoration: none;
}

.privacy-body { min-width: 0; }
.privacy-intro { color: var(--on-surface-variant); margin-bottom: 2.5rem; }
.privacy-section { margin-bottom: 3rem; scroll-margin-top: 96px; }
.privacy-section .sec-overline { margin-bottom: 0.75rem; }
.privacy-section h2 { margin-bottom: 0.75rem; }
.privacy-section h3 { margin: 1.75rem 0 0.5rem; }
.privacy-section p { color: var(--on-surface-variant); margin: 0 0 1rem; }
.privacy-section ul:not(.reset) { color: var(--on-surface-variant); padding-left: 1.25rem; margin: 0 0 1rem; }
.privacy-section ul:not(.reset) li { margin-bottom: 0.5rem; }
.privacy-section strong { color: var(--on-surface); font-weight: 600; }

/* trust callout — surface-container + 3px cyan left-rule + KEY tag */
.callout {
  background: var(--md-sys-color-surface-container);
  border-left: 3px solid var(--md-sys-color-secondary);
  border-radius: 0 8px 8px 0;
  padding: 1.25rem 1.5rem;
  margin: 1.5rem 0;
}
.callout .key-tag {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  color: var(--md-sys-color-on-secondary-container);
  background: var(--md-sys-color-secondary-container);
  padding: 0.2rem 0.5rem;
  border-radius: 4px;
  margin-bottom: 0.6rem;
}
.callout p { color: var(--on-surface); margin: 0; }

/* tables */
.privacy-table-wrap { overflow-x: auto; margin: 1rem 0 1.5rem; }
table.privacy-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.875rem;
  min-width: 480px;
}
table.privacy-table th {
  text-align: left;
  font-family: "JetBrains Mono", ui-monospace, monospace;
  font-weight: 500;
  font-size: 0.6875rem;
  letter-spacing: 0.8px;
  text-transform: uppercase;
  color: var(--on-surface-variant);
  padding: 0.65rem 0.85rem;
  border-bottom: 1px solid var(--md-sys-color-outline);
}
table.privacy-table td {
  padding: 0.75rem 0.85rem;
  border-bottom: 1px solid var(--md-sys-color-outline-variant);
  color: var(--on-surface-variant);
  vertical-align: top;
}
table.privacy-table tbody tr:nth-child(odd) { background: var(--md-sys-color-surface-container-low); }
table.privacy-table strong { color: var(--on-surface); }

.privacy-note {
  border-left: 3px solid var(--md-sys-color-outline);
  padding: 0.5rem 0 0.5rem 1.25rem;
  margin: 1.25rem 0;
  color: var(--on-surface-variant);
  font-style: italic;
}
.privacy-contact a { color: var(--md-sys-color-secondary); font-weight: 600; text-decoration: none; }
.privacy-contact a:hover { text-decoration: underline; }

@media (max-width: 839px) {
  .privacy-layout { grid-template-columns: 1fr; }
  .privacy-nav { display: none; }
  .privacy-nav-mobile { display: block; }
}

/* ===================== scroll-reveal motion ===================== */
.reveal {
  opacity: 0;
  transform: translateY(14px);
  transition: opacity 400ms var(--md-motion-emphasized),
              transform 400ms var(--md-motion-emphasized);
  will-change: opacity, transform;
}
.reveal.is-visible {
  opacity: 1;
  transform: none;
}

@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1; transform: none; transition: none; }
  .btn, .method-card, .evidence-card { transition: none; }
  *, *::before, *::after { animation-duration: 0.001ms !important; }
}

/* utility */
.fp-glyph, .fp-seal { display: block; }
.text-variant { color: var(--on-surface-variant); }
.mt-1 { margin-top: 1rem; }
.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;
}