@font-face {
  font-family: 'Source Serif 4';
  font-style: normal;
  font-weight: 400 700;
  font-display: swap;
  src: url('/fonts/source-serif-4-normal-400700.woff2') format('woff2');
}

@font-face {
  font-family: 'Source Sans 3';
  font-style: normal;
  font-weight: 400 700;
  font-display: swap;
  src: url('/fonts/source-sans-3-normal-400700.woff2') format('woff2');
}

:root {
  --bg: #F8F7F4;
  --bg-alt: #EFECE5;
  --surface: #FFFFFF;
  --surface-muted: #F2F0EB;
  --ink: #141816;
  --ink-muted: #4A544E;
  --border: #D4DAD6;
  --border-strong: #9DA8A1;
  --accent: #0F6E48;
  --accent-hover: #0B5638;
  --accent-ink: #FFFFFF;
  --accent-soft: #E5F3EC;
  --accent-soft-ink: #0B5638;
  --warn-bg: #FEF3C7;
  --warn-ink: #78350F;
  --danger-bg: #FEE2E2;
  --danger-ink: #991B1B;
  --danger-btn: #B91C1C;
  --danger-btn-hover: #991B1B;
  --font-serif: 'Source Serif 4', Georgia, serif;
  --font-sans: 'Source Sans 3', system-ui, -apple-system, sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
  --radius: 10px;
  --radius-sm: 6px;
}

html[data-theme='dark'] {
  --bg: #0F1412;
  --bg-alt: #151C19;
  --surface: #1A231F;
  --surface-muted: #212C27;
  --ink: #F2F5F3;
  --ink-muted: #B6C2BB;
  --border: #2F3D36;
  --border-strong: #4A5E54;
  --accent: #1B875B;
  --accent-hover: #146E49;
  --accent-ink: #FFFFFF;
  --accent-soft: #133829;
  --accent-soft-ink: #A7F3D0;
  --warn-bg: #452708;
  --warn-ink: #FDE68A;
  --danger-bg: #451215;
  --danger-ink: #FECACA;
  --danger-btn: #C81E1E;
  --danger-btn-hover: #9B1C1C;
}

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

html {
  font-size: 16px;
  overflow-x: clip;
}

body {
  margin: 0;
  background-color: var(--bg);
  color: var(--ink);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.55;
  overflow-x: clip;
  touch-action: pan-y pinch-zoom;
  -webkit-font-smoothing: antialiased;
}

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

a {
  color: var(--accent);
  text-underline-offset: 3px;
}

html[data-theme='dark'] a {
  color: #6EE7B7;
}

a:focus-visible,
button:focus-visible,
input:focus-visible,
select:focus-visible,
textarea:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

h1, h2, h3 {
  font-family: var(--font-serif);
  color: var(--ink);
  margin: 0 0 16px;
  line-height: 1.15;
  letter-spacing: -0.015em;
}

h1 {
  font-size: 32px;
  font-weight: 700;
}

h2 {
  font-size: 26px;
  font-weight: 700;
}

h3 {
  font-size: 19px;
  font-weight: 700;
}

p {
  margin: 0 0 16px;
  max-width: 680px;
}

.small-text {
  font-size: 14px;
  line-height: 1.5;
  color: var(--ink-muted);
}

.mono {
  font-family: var(--font-mono);
  font-size: 13px;
  word-break: break-all;
}

.is-hidden {
  display: none !important;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* Container & spacing (360px first) */
.container {
  width: 100%;
  max-width: 1160px;
  margin-left: auto;
  margin-right: auto;
  padding-left: 16px;
  padding-right: 16px;
}

.section {
  padding-top: 48px;
  padding-bottom: 48px;
}

.section-alt {
  background-color: var(--bg-alt);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

/* Header & Navigation */
.site-header {
  background-color: var(--surface);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 40;
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  min-height: 64px;
  padding-top: 8px;
  padding-bottom: 8px;
}

.brand-link {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  color: var(--ink) !important;
  font-weight: 700;
  font-size: 17px;
  min-height: 44px;
  padding: 4px 0;
}

.brand-mark {
  width: 32px;
  height: 32px;
  flex-shrink: 0;
}

.header-controls {
  display: flex;
  align-items: center;
  gap: 8px;
}

.theme-btn,
.menu-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  min-height: 44px;
  min-width: 44px;
  padding: 0 12px;
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-sm);
  background-color: var(--surface);
  color: var(--ink);
  font-family: var(--font-sans);
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
}

.theme-btn:hover,
.menu-btn:hover {
  background-color: var(--surface-muted);
}

.nav-panel {
  display: none;
  border-top: 1px solid var(--border);
  background-color: var(--surface);
  padding: 12px 16px 16px;
}

.nav-panel.is-open {
  display: block;
}

.nav-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.nav-link {
  display: flex;
  align-items: center;
  min-height: 44px;
  padding: 0 12px;
  border-radius: var(--radius-sm);
  text-decoration: none;
  color: var(--ink) !important;
  font-weight: 600;
  font-size: 16px;
}

.nav-link:hover,
.nav-link[aria-current='page'] {
  background-color: var(--accent-soft);
  color: var(--accent-soft-ink) !important;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 48px;
  padding: 0 20px;
  border-radius: var(--radius-sm);
  border: 1px solid transparent;
  font-family: var(--font-sans);
  font-size: 16px;
  font-weight: 700;
  text-decoration: none;
  cursor: pointer;
  line-height: 1.2;
}

.btn-primary {
  background-color: var(--accent);
  color: var(--accent-ink) !important;
  border-color: var(--accent);
}

.btn-primary:hover {
  background-color: var(--accent-hover);
}

.btn-secondary {
  background-color: var(--surface);
  color: var(--ink) !important;
  border-color: var(--border-strong);
  min-height: 44px;
  font-weight: 600;
}

.btn-secondary:hover {
  background-color: var(--surface-muted);
}

.btn-danger {
  background-color: var(--danger-btn);
  color: #FFFFFF !important;
  border-color: var(--danger-btn);
  min-height: 44px;
}

.btn-danger:hover {
  background-color: var(--danger-btn-hover);
}

.btn-sm {
  min-height: 44px;
  padding: 0 14px;
  font-size: 14px;
}

.btn-row {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  align-items: center;
}

/* Badges */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 4px 10px;
  border-radius: 4px;
  font-size: 13px;
  font-weight: 700;
  line-height: 1.3;
  letter-spacing: 0.01em;
}

.badge-sample {
  background-color: var(--warn-bg);
  color: var(--warn-ink);
  border: 1px solid currentColor;
}

.badge-active {
  background-color: var(--accent-soft);
  color: var(--accent-soft-ink);
}

.badge-expiring {
  background-color: var(--warn-bg);
  color: var(--warn-ink);
}

.badge-disputed {
  background-color: var(--danger-bg);
  color: var(--danger-ink);
}

.badge-neutral {
  background-color: var(--surface-muted);
  color: var(--ink-muted);
  border: 1px solid var(--border);
}

/* Hero & Ledger Layout */
.hero-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 28px;
  align-items: start;
}

.eyebrow {
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 10px;
}

html[data-theme='dark'] .eyebrow {
  color: #6EE7B7;
}

.lead {
  font-size: 18px;
  line-height: 1.55;
  color: var(--ink-muted);
  margin-bottom: 24px;
}

.ledger-card {
  background-color: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
}

.ledger-card + .ledger-card,
.ledger-card + div,
.wallet-layout {
  margin-top: 24px;
}

#open-new-purchase-btn {
  width: 100%;
  margin-bottom: 16px;
}

.ledger-head {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: flex-start;
  gap: 10px;
  padding-bottom: 14px;
  margin-bottom: 14px;
  border-bottom: 1px solid var(--border);
}

.ledger-rows {
  list-style: none;
  margin: 0;
  padding: 0;
}

.ledger-row {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 12px;
  padding: 12px 0;
  border-bottom: 1px dashed var(--border);
}

.ledger-row:last-child {
  border-bottom: none;
  padding-bottom: 0;
}

/* Two-column editorial splits */
.split-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 24px;
}

.check-list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.check-list li {
  position: relative;
  padding-left: 24px;
  margin-bottom: 12px;
}

.check-list li::before {
  content: '—';
  position: absolute;
  left: 0;
  top: 0;
  color: var(--accent);
  font-weight: 700;
}

html[data-theme='dark'] .check-list li::before {
  color: #6EE7B7;
}

/* Interactive Sample Case Tabs */
.tab-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 20px;
}

.tab-btn {
  min-height: 44px;
  padding: 0 16px;
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-sm);
  background-color: var(--surface);
  color: var(--ink);
  font-family: var(--font-sans);
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
}

.tab-btn[aria-selected='true'] {
  background-color: var(--accent);
  color: var(--accent-ink);
  border-color: var(--accent);
}

/* Timeline */
.timeline {
  list-style: none;
  margin: 0;
  padding: 0 0 0 18px;
  border-left: 2px solid var(--border-strong);
}

.timeline-item {
  position: relative;
  padding: 0 0 20px 18px;
}

.timeline-item:last-child {
  padding-bottom: 0;
}

.timeline-item::before {
  content: '';
  position: absolute;
  left: -7px;
  top: 6px;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background-color: var(--accent);
  border: 2px solid var(--surface);
}

/* Forms (never < 16px font size!) */
.form-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
}

.field {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.field label {
  font-weight: 600;
  font-size: 15px;
  color: var(--ink);
}

.field input,
.field select,
.field textarea {
  width: 100%;
  min-height: 46px;
  padding: 10px 12px;
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.4;
  color: var(--ink);
  background-color: var(--surface);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-sm);
}

.field textarea {
  min-height: 104px;
  resize: vertical;
}

.honeypot {
  position: absolute;
  left: -9999px;
  width: 1px;
  height: 1px;
  overflow: hidden;
}

.notice {
  padding: 14px 16px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  background-color: var(--surface-muted);
  font-size: 15px;
  margin-bottom: 16px;
}

.notice-ok {
  background-color: var(--accent-soft);
  color: var(--accent-soft-ink);
  border-color: var(--accent);
}

.notice-error {
  background-color: var(--danger-bg);
  color: var(--danger-ink);
  border-color: var(--danger-btn);
}

.notice-warn {
  background-color: var(--warn-bg);
  color: var(--warn-ink);
  border-color: var(--warn-ink);
}

/* Wallet Workspace */
.wallet-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: 24px;
  align-items: start;
}

.purchase-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.purchase-item-btn {
  width: 100%;
  text-align: left;
  padding: 14px 16px;
  background-color: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--ink);
  font-family: var(--font-sans);
  cursor: pointer;
  min-height: 44px;
}

.purchase-item-btn:hover {
  border-color: var(--border-strong);
}

.purchase-item-btn.is-selected {
  border-color: var(--accent);
  box-shadow: inset 3px 0 0 var(--accent);
}

.meta-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
  padding: 14px 0;
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  margin: 14px 0;
}

.meta-label {
  font-size: 13px;
  color: var(--ink-muted);
  display: block;
}

.meta-value {
  font-size: 16px;
  font-weight: 600;
  color: var(--ink);
}

.evidence-thumb {
  max-width: 240px;
  max-height: 180px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  margin-top: 8px;
}

/* Tables stacked safely on mobile */
.table-wrap {
  width: 100%;
  overflow-x: auto;
}

.data-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 15px;
}

.data-table th,
.data-table td {
  text-align: left;
  padding: 12px 10px;
  border-bottom: 1px solid var(--border);
  vertical-align: top;
}

.data-table th {
  font-size: 13px;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--ink-muted);
}

/* Footer */
.site-footer {
  border-top: 1px solid var(--border);
  background-color: var(--surface);
  padding-top: 40px;
  padding-bottom: 40px;
  margin-top: 48px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 24px;
}

.footer-links {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 8px 18px;
}

.footer-links a {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  font-size: 15px;
}

/* Tablet & Desktop breakpoints */
@media (min-width: 720px) {
  .container {
    padding-left: 24px;
    padding-right: 24px;
  }

  .menu-btn {
    display: none;
  }

  .header-controls {
    order: 3;
  }

  .nav-panel {
    display: block;
    border-top: none;
    padding: 0;
    margin-left: auto;
    order: 2;
  }

  .nav-list {
    flex-direction: row;
    align-items: center;
    gap: 6px;
  }

  .form-grid-2 {
    grid-template-columns: 1fr 1fr;
  }

  .meta-grid {
    grid-template-columns: 1fr 1fr;
  }

  .split-grid {
    grid-template-columns: 1fr 1fr;
    gap: 36px;
  }

  .footer-grid {
    grid-template-columns: 1.4fr 1fr;
    align-items: start;
  }
}

@media (min-width: 960px) {
  .container {
    padding-left: 32px;
    padding-right: 32px;
  }

  .section {
    padding-top: 84px;
    padding-bottom: 84px;
  }

  h1 {
    font-size: 52px;
  }

  h2 {
    font-size: 36px;
  }

  h3 {
    font-size: 22px;
  }

  .hero-grid {
    grid-template-columns: 1.15fr 0.85fr;
    gap: 44px;
  }

  .wallet-layout {
    grid-template-columns: 360px 1fr;
    gap: 28px;
  }
}

/* Clean Print / PDF Evidence Pack output */
@media print {
  .site-header,
  .site-footer,
  .no-print {
    display: none !important;
  }

  body {
    background: #FFFFFF;
    color: #000000;
    font-size: 12pt;
  }

  .ledger-card {
    border: 1px solid #999999;
    box-shadow: none;
  }
}