/* ==========================================================================
   Custodian — shared stylesheet
   Design system: "the receipt" — paper, ledger green, stamp red.
   No frameworks, no build step, system fonts only.
   ========================================================================== */

/* ---- Tokens -------------------------------------------------------------- */

:root {
  --paper: #EEEFE7;
  --paper-raised: #F6F7F0;
  --ink: #1E2320;
  --ink-soft: #4B5148;
  --graphite: #6E7268;
  --line: #D7D9CB;
  --ledger: #2F5D4F;
  --ledger-soft: #E2EBE6;
  --stamp: #A23B2E;
  --stamp-soft: #F3E2DE;
  --amber: #93701E;
  --isolation: #2D4159;

  --font-mono: ui-monospace, "SF Mono", "Cascadia Mono", "Roboto Mono", Menlo, Consolas, "Liberation Mono", monospace;
  --font-sans: -apple-system, "Segoe UI Variable Text", "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;

  --radius: 10px;
  --radius-sm: 8px;
  --container: 1120px;

  --amber-soft: color-mix(in srgb, var(--amber) 16%, var(--paper));
  --isolation-soft: color-mix(in srgb, var(--isolation) 14%, var(--paper));
}

@media (prefers-color-scheme: dark) {
  :root {
    --paper: #15180F;
    --paper-raised: #1D2118;
    --ink: #E9E7DC;
    --ink-soft: #B9BBAE;
    --graphite: #8B8F80;
    --line: #2C3126;
    --ledger: #6FA593;
    --ledger-soft: #1F2E27;
    --stamp: #E2705B;
    --stamp-soft: #33231D;
    --amber: #D1AE5A;
    --isolation: #6E93BE;
  }
}

/* ---- Reset ---------------------------------------------------------------- */

*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body, h1, h2, h3, h4, p, figure, blockquote, dl, dd { margin: 0; }
ul, ol { margin: 0; padding: 0; list-style: none; }
img, svg { display: block; max-width: 100%; }
a { color: inherit; }
button { font: inherit; color: inherit; background: none; border: 0; cursor: pointer; }
input, textarea { font: inherit; }

html {
  color-scheme: light dark;
}

body {
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

:focus-visible {
  outline: 2px solid var(--ledger);
  outline-offset: 2px;
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
    scroll-behavior: auto !important;
  }
}

/* ---- Typography ------------------------------------------------------------ */

h1, h2, h3, h4 {
  font-weight: 650;
  letter-spacing: -0.01em;
  line-height: 1.15;
}

h1 { font-size: clamp(2.1rem, 1.5rem + 2.3vw, 3.2rem); }
h2 { font-size: clamp(1.5rem, 1.3rem + 1vw, 2.05rem); }
h3 { font-size: 1.2rem; }
h4 { font-size: 1rem; }

p { color: var(--ink-soft); }
.lede { font-size: 1.15rem; color: var(--ink-soft); max-width: 62ch; }

.mono { font-family: var(--font-mono); }

.kicker {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ledger);
  font-weight: 600;
}
.kicker::before {
  content: "";
  width: 14px;
  height: 1px;
  background: var(--ledger);
}
.kicker.is-stamp { color: var(--stamp); }
.kicker.is-stamp::before { background: var(--stamp); }
.kicker.is-isolation { color: var(--isolation); }
.kicker.is-isolation::before { background: var(--isolation); }

.eyebrow-gap { margin-bottom: 14px; }

.text-graphite { color: var(--graphite); }
.text-ink-soft { color: var(--ink-soft); }

/* ---- Layout ---------------------------------------------------------------- */

.container {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 24px;
}

.section { padding: 72px 0; }
.section-tight { padding: 44px 0; }

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

.grid-2 {
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: 56px;
  align-items: center;
}

.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

@media (max-width: 860px) {
  .grid-2 { grid-template-columns: 1fr; gap: 40px; }
  .grid-3 { grid-template-columns: 1fr; }
}

.stack { display: flex; flex-direction: column; gap: 16px; }
.row { display: flex; align-items: center; gap: 12px; }
.row-wrap { flex-wrap: wrap; }

/* ---- Header ----------------------------------------------------------------- */

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: var(--paper);
  border-bottom: 1px solid var(--line);
}

.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 68px;
  gap: 24px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 1rem;
  letter-spacing: 0.01em;
  text-decoration: none;
  flex-shrink: 0;
}

.brand-mark {
  width: 20px;
  height: 20px;
  flex-shrink: 0;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 4px;
  flex: 1;
  justify-content: center;
}

.nav-link {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  letter-spacing: 0.02em;
  text-decoration: none;
  color: var(--ink-soft);
  padding: 8px 12px;
  border-radius: 6px;
  transition: color 180ms ease, background-color 180ms ease;
  white-space: nowrap;
}
.nav-link:hover { color: var(--ink); background: var(--paper-raised); }
.nav-link.is-active { color: var(--ledger); }

.header-cta { flex-shrink: 0; }

.nav-toggle {
  display: none;
  padding: 8px;
  border-radius: 6px;
}

@media (max-width: 860px) {
  .site-nav {
    position: fixed;
    top: 68px;
    left: 0;
    right: 0;
    background: var(--paper);
    border-bottom: 1px solid var(--line);
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 8px 16px 16px;
    transform: translateY(-8px);
    opacity: 0;
    pointer-events: none;
    transition: opacity 180ms ease, transform 180ms ease;
  }
  .site-nav.is-open {
    opacity: 1;
    transform: translateY(0);
    pointer-events: auto;
  }
  .nav-link { padding: 12px 8px; border-radius: 6px; }
  .nav-toggle { display: inline-flex; }
  .header-cta { display: none; }
}

/* ---- Footer ------------------------------------------------------------------ */

.site-footer {
  border-top: 1px solid var(--line);
  padding: 40px 0 32px;
}

.footer-top {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  flex-wrap: wrap;
  gap: 24px;
  padding-bottom: 24px;
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 4px 4px;
}

.footer-links a {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  text-decoration: none;
  color: var(--ink-soft);
  padding: 6px 10px;
  border-radius: 6px;
}
.footer-links a:hover { color: var(--ledger); background: var(--paper-raised); }

.footer-ledger {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--graphite);
  border-top: 1px dashed var(--line);
  padding-top: 18px;
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 8px;
}

/* ---- Buttons ------------------------------------------------------------------ */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-family: var(--font-sans);
  font-size: 0.95rem;
  font-weight: 600;
  padding: 11px 20px;
  border-radius: var(--radius-sm);
  border: 1px solid transparent;
  text-decoration: none;
  transition: background-color 200ms ease, color 200ms ease, border-color 200ms ease, opacity 200ms ease, transform 150ms ease;
}
.btn:active { transform: translateY(1px); }

.btn-primary { background: var(--ledger); color: var(--paper-raised); }
.btn-primary:hover { opacity: 0.88; }

.btn-destructive { background: var(--stamp); color: var(--paper-raised); }
.btn-destructive:hover { opacity: 0.88; }

.btn-outline { background: transparent; border-color: var(--line); color: var(--ink); }
.btn-outline:hover { border-color: var(--ledger); color: var(--ledger); }

.btn-ghost { background: transparent; color: var(--ink-soft); padding: 8px 12px; }
.btn-ghost:hover { color: var(--ink); }

.btn-sm { padding: 6px 14px; font-size: 0.83rem; border-radius: 6px; }
.btn-full { width: 100%; }

/* ---- Pills / badges ------------------------------------------------------------ */

.pill {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 10px;
  border-radius: 999px;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  background: var(--ledger-soft);
  color: var(--ledger);
  white-space: nowrap;
}
.pill-amber { background: var(--amber-soft); color: var(--amber); }
.pill-isolation { background: var(--isolation-soft); color: var(--isolation); }
.pill-stamp { background: var(--stamp-soft); color: var(--stamp); }
.pill-graphite { background: var(--paper-raised); color: var(--graphite); border: 1px solid var(--line); }

/* ---- Toggle switch (used sparingly, e.g. Shield Mode illustration) ------------- */

.toggle {
  width: 42px;
  height: 24px;
  border-radius: 999px;
  background: var(--line);
  position: relative;
  flex-shrink: 0;
  transition: background-color 200ms ease;
}
.toggle::after {
  content: "";
  position: absolute;
  top: 2px;
  left: 2px;
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: var(--paper-raised);
  transition: transform 200ms ease;
}
.toggle.is-on { background: var(--ledger); }
.toggle.is-on::after { transform: translateX(18px); }

/* ---- Cards ---------------------------------------------------------------------- */

.card {
  background: var(--paper-raised);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 24px;
}

.card-callout {
  border-left: 3px solid var(--isolation);
}
.card-callout.is-amber { border-left-color: var(--amber); }
.card-callout.is-stamp { border-left-color: var(--stamp); }
.card-callout.is-ledger { border-left-color: var(--ledger); }

.feature-card h3 { margin-bottom: 8px; }
.feature-card p { font-size: 0.94rem; }

/* ---- Receipt component ------------------------------------------------------------ */

.receipt {
  --notch-bg: var(--paper);
  position: relative;
  background: var(--paper-raised);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 30px 26px 26px;
}

.receipt-on-raised { --notch-bg: var(--paper); }

.receipt::before {
  content: "";
  position: absolute;
  top: -1px;
  left: 8px;
  right: 8px;
  height: 9px;
  background-image: radial-gradient(circle at 9px 0, var(--notch-bg) 6px, transparent 6.5px);
  background-size: 18px 9px;
  background-repeat: repeat-x;
  border-top: 1px dashed var(--line);
}

.receipt-head {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 12px;
  margin-bottom: 16px;
  padding-bottom: 14px;
  border-bottom: 1px dashed var(--line);
}

.receipt-head .receipt-title {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 0.95rem;
}

.receipt-head .receipt-meta {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--graphite);
}

.receipt-lines { display: flex; flex-direction: column; gap: 10px; }

.receipt-line {
  display: flex;
  align-items: baseline;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 0.86rem;
}

.receipt-line .rl-label { color: var(--ink-soft); white-space: nowrap; }
.receipt-line .rl-leader {
  flex: 1;
  border-bottom: 1px dotted var(--line);
  height: 1px;
  transform: translateY(-4px);
}
.receipt-line .rl-value { color: var(--ink); font-weight: 600; white-space: nowrap; }
.receipt-line .rl-value.is-ledger { color: var(--ledger); }
.receipt-line .rl-value.is-stamp { color: var(--stamp); }
.receipt-line .rl-value.is-amber { color: var(--amber); }
.receipt-line .rl-value.is-isolation { color: var(--isolation); }

.receipt-foot {
  margin-top: 18px;
  padding-top: 14px;
  border-top: 1px dashed var(--line);
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
}

/* Stamp mark */
.stamp {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 3px solid var(--stamp);
  color: var(--stamp);
  font-family: var(--font-mono);
  font-weight: 800;
  font-size: 0.85rem;
  letter-spacing: 0.1em;
  padding: 7px 16px;
  border-radius: 6px;
  transform: rotate(-6deg) scale(0.85);
  opacity: 0;
  transition: transform 260ms ease-out, opacity 260ms ease-out;
}
.stamp.is-visible {
  transform: rotate(-6deg) scale(1);
  opacity: 1;
}
.stamp.is-shipped { border-color: var(--ledger); color: var(--ledger); }

/* ---- Numbered steps (genuine sequences only) ---------------------------------------- */

.steps { display: flex; flex-direction: column; }

.step {
  display: grid;
  grid-template-columns: 44px 1fr;
  gap: 20px;
  padding: 24px 0;
  border-top: 1px solid var(--line);
}
.step:last-child { padding-bottom: 0; }

.step-num {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--ledger);
  font-weight: 700;
  padding-top: 2px;
}

.step h3 { margin-bottom: 6px; }
.step p { font-size: 0.95rem; }

/* ---- FAQ accordion (native <details>) -------------------------------------------------- */

.faq-item {
  border-bottom: 1px solid var(--line);
}
.faq-item:first-child { border-top: 1px solid var(--line); }

.faq-item summary {
  cursor: pointer;
  list-style: none;
  padding: 20px 4px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  font-family: var(--font-mono);
  font-weight: 600;
  font-size: 0.95rem;
}
.faq-item summary::-webkit-details-marker { display: none; }

.faq-item summary::after {
  content: "+";
  font-family: var(--font-sans);
  font-size: 1.3rem;
  color: var(--ledger);
  flex-shrink: 0;
  transition: transform 200ms ease;
}
.faq-item[open] summary::after { transform: rotate(45deg); }

.faq-answer {
  padding: 0 4px 22px;
  max-width: 68ch;
}
.faq-answer p + p { margin-top: 12px; }

/* ---- Comparison list (privacy page) ------------------------------------------------------ */

.compare {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}
@media (max-width: 720px) { .compare { grid-template-columns: 1fr; } }

.compare-col { padding: 22px; border-radius: var(--radius); border: 1px solid var(--line); }
.compare-col.is-can { background: var(--ledger-soft); }
.compare-col.is-cannot { background: var(--paper-raised); }

.compare-col h3 { margin-bottom: 14px; font-size: 1rem; }
.compare-col ul { display: flex; flex-direction: column; gap: 10px; }
.compare-col li { font-size: 0.92rem; padding-left: 20px; position: relative; }
.compare-col.is-can li::before {
  content: "✓";
  position: absolute; left: 0; color: var(--ledger); font-weight: 700;
}
.compare-col.is-cannot li::before {
  content: "✕";
  position: absolute; left: 0; color: var(--graphite); font-weight: 700;
}

/* ---- Demo widget (homepage signature element) --------------------------------------------- */

.demo {
  background: var(--paper-raised);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 20px;
}

.demo-browser {
  border: 1px solid var(--line);
  border-radius: 8px;
  overflow: hidden;
  background: var(--paper);
}

.demo-tabbar {
  display: flex;
  background: var(--paper-raised);
  border-bottom: 1px solid var(--line);
  padding: 8px 8px 0;
  gap: 6px;
}

.demo-tab {
  display: flex;
  align-items: center;
  gap: 8px;
  background: var(--paper);
  border: 1px solid var(--line);
  border-bottom: none;
  border-radius: 6px 6px 0 0;
  padding: 8px 10px;
  font-size: 0.82rem;
  max-width: 220px;
  transition: opacity 250ms ease;
}
.demo-tab.is-closed { opacity: 0.35; }

.demo-tab-favicon {
  width: 10px; height: 10px; border-radius: 3px;
  background: var(--isolation);
  flex-shrink: 0;
}
.demo-tab-title { font-family: var(--font-mono); font-size: 0.78rem; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.demo-tab-close {
  margin-left: 4px;
  width: 18px; height: 18px;
  border-radius: 4px;
  display: flex; align-items: center; justify-content: center;
  color: var(--graphite);
  font-size: 0.9rem;
  line-height: 1;
  flex-shrink: 0;
}
.demo-tab-close:hover { background: var(--stamp-soft); color: var(--stamp); }
.demo-tab-close:disabled { opacity: 0.3; cursor: default; background: none; color: var(--graphite); }

.demo-viewport {
  min-height: 96px;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
}
.demo-empty {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--graphite);
}

.demo-status { margin-top: 16px; }
.demo-countdown {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  font-size: 0.9rem;
  margin-bottom: 8px;
}
.demo-countdown-text { font-family: var(--font-mono); font-size: 0.82rem; }
.demo-countdown-text strong { color: var(--ink); }

.demo-progress {
  height: 4px;
  background: var(--line);
  border-radius: 999px;
  overflow: hidden;
}
.demo-progress-bar {
  height: 100%;
  background: var(--stamp);
  width: 100%;
  border-radius: 999px;
}
.demo-progress-bar.is-counting {
  transition: width linear;
}

.demo .receipt { margin-top: 16px; }
.demo-actions { margin-top: 14px; display: flex; justify-content: flex-end; }

/* ---- Shield mode micro-demo ------------------------------------------------------------------ */

.shield-demo {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 16px 18px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--paper-raised);
}
.shield-demo-label { font-family: var(--font-mono); font-size: 0.85rem; font-weight: 600; }
.shield-demo-desc { font-size: 0.88rem; color: var(--ink-soft); margin-top: 2px; }

/* ---- Page transition fade ---------------------------------------------------------------------- */

#page {
  opacity: 1;
  transition: opacity 140ms ease;
}
#page.is-fading { opacity: 0; }

/* ---- Hero ------------------------------------------------------------------------------------------ */

.hero { padding: 56px 0 64px; }
.hero-actions { display: flex; gap: 12px; margin-top: 28px; flex-wrap: wrap; }
.hero h1 { margin-bottom: 18px; }

/* ---- Utility spacing --------------------------------------------------------------------------------- */

.mt-0 { margin-top: 0; }
.mt-1 { margin-top: 8px; }
.mt-2 { margin-top: 16px; }
.mt-3 { margin-top: 24px; }
.mt-4 { margin-top: 32px; }
.mb-2 { margin-bottom: 16px; }
.mb-3 { margin-bottom: 24px; }

.center-head { max-width: 640px; margin: 0 auto 40px; text-align: center; }
.center-head .lede { margin: 0 auto; }

@media (max-width: 720px) {
  .section { padding: 52px 0; }
  .receipt { padding: 24px 18px 20px; }
}