:root {
  color-scheme: light;
  --page: oklch(0.957 0.011 260);
  --surface: oklch(0.997 0.002 260);
  --surface-soft: oklch(0.978 0.008 260);
  --ink: oklch(0.205 0.032 258);
  --ink-soft: oklch(0.435 0.035 258);
  --ink-inverse: oklch(0.997 0.002 260);
  --line: oklch(0.84 0.02 258);
  --line-strong: oklch(0.7 0.035 258);
  --primary: oklch(0.38 0.145 260);
  --primary-strong: oklch(0.29 0.13 260);
  --primary-soft: oklch(0.935 0.038 260);
  --primary-border: oklch(0.78 0.07 260);
  --success: oklch(0.39 0.095 172);
  --success-soft: oklch(0.955 0.035 172);
  --warning: oklch(0.45 0.095 82);
  --warning-soft: oklch(0.965 0.045 88);
  --danger: oklch(0.42 0.135 24);
  --danger-soft: oklch(0.956 0.04 24);
  --chrome: oklch(0.205 0.032 258);
  --chrome-muted: oklch(0.86 0.025 260);
  --focus: oklch(0.62 0.12 260);
  font-family: "Avenir Next", Avenir, "Segoe UI Variable", "Segoe UI", ui-sans-serif, system-ui, sans-serif;
}

* {
  box-sizing: border-box;
}

[hidden] {
  display: none !important;
}

html {
  background: var(--page);
}

body {
  min-width: 320px;
  min-height: 100vh;
  margin: 0;
  background: var(--page);
  color: var(--ink);
  font-size: 15px;
  line-height: 1.5;
}

a {
  color: inherit;
  text-underline-offset: 0.18em;
}

button,
input,
textarea {
  font: inherit;
}

button,
input[type="file"] {
  cursor: pointer;
}

:focus-visible {
  outline: 3px solid var(--focus);
  outline-offset: 3px;
}

.skip-link {
  position: fixed;
  z-index: 10;
  top: 12px;
  left: 12px;
  transform: translateY(-160%);
  border-radius: 6px;
  background: var(--surface);
  padding: 9px 13px;
  color: var(--primary-strong);
  font-weight: 700;
  transition: transform 160ms ease-out;
  min-height: 44px;
}

.skip-link:focus {
  transform: translateY(0);
}

.site-header {
  min-height: 76px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 14px max(24px, calc((100vw - 1180px) / 2));
  background: var(--chrome);
  color: var(--ink-inverse);
}

.brand {
  min-height: 44px;
  display: inline-flex;
  align-items: center;
  gap: 11px;
  text-decoration: none;
}

.brand-mark {
  width: 40px;
  height: 40px;
  display: grid;
  place-items: center;
  border: 1px solid var(--primary-border);
  border-radius: 8px;
  color: var(--chrome-muted);
  font-size: 19px;
  font-weight: 800;
}

.brand strong,
.brand small {
  display: block;
}

.brand strong {
  font-size: 16px;
}

.brand small {
  margin-top: 1px;
  color: var(--chrome-muted);
  font-size: 12px;
}

.site-header nav {
  display: flex;
  align-items: center;
  gap: 22px;
  color: var(--chrome-muted);
  font-size: 13px;
  font-weight: 650;
}

.site-header nav a,
footer a {
  min-height: 44px;
  display: inline-flex;
  align-items: center;
}

.site-header nav a:hover {
  color: var(--ink-inverse);
}

main {
  width: min(1180px, calc(100% - 48px));
  margin: 0 auto;
  padding: 64px 0 48px;
}

.briefing {
  display: grid;
  grid-template-columns: minmax(0, 0.88fr) minmax(520px, 1.12fr);
  align-items: start;
  gap: clamp(40px, 6vw, 88px);
}

.briefing-copy {
  padding-top: 12px;
}

.availability {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  border-radius: 999px;
  background: var(--success-soft);
  padding: 5px 10px;
  color: var(--success);
  font-size: 12px;
  font-weight: 700;
}

.availability span {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--success);
}

h1,
h2,
h3,
p {
  text-wrap: pretty;
}

h1,
h2,
h3 {
  text-wrap: balance;
}

h1 {
  max-width: 12ch;
  margin: 22px 0 16px;
  font-size: 44px;
  font-weight: 780;
  letter-spacing: -0.025em;
  line-height: 1.06;
}

.lede {
  max-width: 62ch;
  margin: 0;
  color: var(--ink-soft);
  font-size: 17px;
  line-height: 1.62;
}

.verification-sequence {
  display: grid;
  gap: 18px;
  margin: 34px 0 0;
  padding: 0;
  list-style: none;
}

.verification-sequence li {
  display: grid;
  grid-template-columns: 30px minmax(0, 1fr);
  gap: 13px;
}

.verification-sequence li > span {
  width: 28px;
  height: 28px;
  display: grid;
  place-items: center;
  border: 1px solid var(--line-strong);
  border-radius: 50%;
  color: var(--primary-strong);
  font-size: 12px;
  font-weight: 800;
}

.verification-sequence strong {
  display: block;
  font-size: 14px;
}

.verification-sequence p {
  max-width: 54ch;
  margin: 3px 0 0;
  color: var(--ink-soft);
  font-size: 13px;
}

.verifier {
  border: 1px solid var(--line);
  border-radius: 10px;
  background: var(--surface);
  box-shadow: 0 2px 8px oklch(0.2 0.03 258 / 0.08);
}

.verifier-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 20px;
  padding: 22px 22px 18px;
  border-bottom: 1px solid var(--line);
}

.verifier-header h2 {
  margin: 0;
  font-size: 18px;
}

.verifier-header p {
  max-width: 54ch;
  margin: 4px 0 0;
  color: var(--ink-soft);
  font-size: 13px;
}

.privacy-badge {
  flex: none;
  border-radius: 999px;
  background: var(--primary-soft);
  padding: 5px 9px;
  color: var(--primary-strong);
  font-size: 11px;
  font-weight: 700;
}

#verification-form {
  padding: 20px 22px 18px;
}

.file-control {
  min-height: 40px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  margin-bottom: 16px;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: var(--surface-soft);
  padding: 7px 9px 7px 12px;
  color: var(--primary-strong);
  font-size: 13px;
  font-weight: 700;
}

.file-control:focus-within,
.file-control:hover {
  border-color: var(--primary);
}

.file-control input {
  max-width: 245px;
  color: var(--ink-soft);
  font-size: 12px;
}

.receipt-label {
  display: block;
  margin-bottom: 7px;
  font-size: 13px;
  font-weight: 700;
}

textarea {
  width: 100%;
  min-height: 250px;
  resize: vertical;
  border: 1px solid var(--line-strong);
  border-radius: 6px;
  background: var(--surface);
  padding: 12px;
  color: var(--ink);
  font-family: ui-monospace, monospace;
  font-size: 12px;
  line-height: 1.55;
  tab-size: 2;
}

textarea::placeholder {
  color: var(--ink-soft);
}

textarea:focus {
  border-color: var(--primary);
}

.input-help {
  margin: 7px 0 0;
  color: var(--ink-soft);
  font-size: 12px;
}

.form-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 9px;
  margin-top: 17px;
}

.button {
  min-height: 44px;
  border-radius: 6px;
  padding: 0 13px;
  font-size: 13px;
  font-weight: 700;
  transition: background-color 160ms ease-out, border-color 160ms ease-out, color 160ms ease-out, transform 160ms ease-out;
}

.button:hover:not(:disabled) {
  transform: translateY(-1px);
}

.button:active:not(:disabled) {
  transform: translateY(0);
}

.button:disabled {
  cursor: wait;
  opacity: 0.62;
}

.button.primary {
  border: 1px solid var(--primary);
  background: var(--primary);
  color: var(--ink-inverse);
}

.button.primary:hover:not(:disabled) {
  border-color: var(--primary-strong);
  background: var(--primary-strong);
}

.button.secondary {
  border: 1px solid var(--line-strong);
  background: var(--surface);
  color: var(--primary-strong);
}

.button.secondary:hover:not(:disabled) {
  border-color: var(--primary);
  background: var(--primary-soft);
}

.button.quiet {
  border: 1px solid transparent;
  background: transparent;
  color: var(--ink-soft);
}

.button.quiet:hover:not(:disabled) {
  color: var(--ink);
}

.activity {
  min-height: 42px;
  display: flex;
  align-items: center;
  border-top: 1px solid var(--line);
  padding: 10px 22px;
  color: var(--ink-soft);
  font-size: 12px;
}

.activity[data-busy="true"]::before {
  width: 8px;
  height: 8px;
  margin-right: 9px;
  border-radius: 50%;
  background: var(--primary);
  content: "";
  animation: verify-pulse 1.1s ease-in-out infinite alternate;
}

@keyframes verify-pulse {
  to { opacity: 0.35; }
}

.result {
  margin-top: 42px;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: var(--surface);
  overflow: hidden;
}

.result-header {
  display: grid;
  grid-template-columns: 44px minmax(0, 1fr) auto;
  align-items: center;
  gap: 15px;
  padding: 22px;
  background: var(--surface-soft);
}

.result[data-state="verified"] .result-header {
  background: var(--success-soft);
}

.result[data-state="review"] .result-header {
  background: var(--warning-soft);
}

.result[data-state="error"] .result-header {
  background: var(--danger-soft);
}

.result-symbol {
  width: 42px;
  height: 42px;
  display: grid;
  place-items: center;
  border: 1px solid currentColor;
  border-radius: 50%;
  color: var(--ink-soft);
  font-size: 18px;
  font-weight: 800;
}

.result[data-state="verified"] .result-symbol { color: var(--success); }
.result[data-state="review"] .result-symbol { color: var(--warning); }
.result[data-state="error"] .result-symbol { color: var(--danger); }

.result-header p,
.result-header h2 {
  margin: 0;
}

#result-kicker {
  color: var(--ink-soft);
  font-size: 11px;
  font-weight: 700;
}

.result-header h2 {
  margin-top: 2px;
  font-size: 19px;
}

#result-summary {
  max-width: 75ch;
  margin-top: 4px;
  color: var(--ink-soft);
  font-size: 13px;
}

.result-facts {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  margin: 0;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.result-facts div {
  min-width: 0;
  padding: 16px 18px;
}

.result-facts div + div {
  border-left: 1px solid var(--line);
}

dt {
  color: var(--ink-soft);
  font-size: 11px;
  font-weight: 650;
}

dd {
  margin: 4px 0 0;
  font-size: 14px;
  font-weight: 700;
}

.evidence-details {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 32px;
  padding: 22px;
}

.evidence-details h3,
.proof-gaps h3 {
  margin: 0 0 12px;
  font-size: 14px;
}

.evidence-details dl,
.boundary dl {
  display: grid;
  gap: 10px;
  margin: 0;
}

.evidence-details dl > div {
  display: grid;
  grid-template-columns: 110px minmax(0, 1fr);
  gap: 10px;
  align-items: baseline;
}

.evidence-details dd {
  min-width: 0;
  overflow-wrap: anywhere;
  font-size: 12px;
  font-weight: 600;
}

code {
  font-family: ui-monospace, monospace;
  font-size: 11px;
}

.proof-gaps {
  padding: 0 22px 22px;
}

.proof-gaps ul {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.proof-gaps li {
  border-radius: 999px;
  background: var(--warning-soft);
  padding: 4px 9px;
  color: var(--warning);
  font-size: 11px;
  font-weight: 700;
}

.boundary {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(420px, 1.1fr);
  gap: 56px;
  margin-top: 56px;
  padding: 32px 0 8px;
  border-top: 1px solid var(--line-strong);
}

.boundary h2 {
  margin: 0;
  font-size: 22px;
}

.boundary p {
  max-width: 66ch;
  margin: 9px 0 0;
  color: var(--ink-soft);
}

.boundary dl > div {
  display: grid;
  grid-template-columns: 130px minmax(0, 1fr);
  gap: 14px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--line);
}

.boundary dd {
  margin: 0;
  color: var(--ink);
  font-size: 13px;
  font-weight: 600;
}

footer {
  width: min(1180px, calc(100% - 48px));
  display: flex;
  justify-content: space-between;
  gap: 20px;
  margin: 0 auto;
  padding: 28px 0 36px;
  color: var(--ink-soft);
  font-size: 12px;
}

footer p {
  margin: 0;
}

noscript {
  display: block;
  background: var(--danger-soft);
  padding: 12px 24px;
  color: var(--danger);
  text-align: center;
  font-weight: 700;
}

@media (max-width: 920px) {
  .briefing,
  .boundary {
    grid-template-columns: 1fr;
  }

  .briefing {
    gap: 42px;
  }

  h1 {
    max-width: 16ch;
  }

  .result-facts {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .result-facts div:nth-child(3) {
    border-left: 0;
    border-top: 1px solid var(--line);
  }

  .result-facts div:nth-child(4) {
    border-top: 1px solid var(--line);
  }
}

@media (max-width: 640px) {
  .site-header {
    align-items: flex-start;
    padding: 14px 18px;
  }

  .site-header nav {
    flex-direction: column;
    align-items: flex-end;
    gap: 4px;
  }

  main,
  footer {
    width: min(100% - 28px, 1180px);
  }

  main {
    padding-top: 38px;
  }

  h1 {
    font-size: 36px;
  }

  .verifier-header,
  .result-header {
    align-items: flex-start;
  }

  .verifier-header {
    flex-direction: column;
  }

  .file-control {
    align-items: flex-start;
    flex-direction: column;
  }

  .file-control input {
    max-width: 100%;
  }

  .result-header {
    grid-template-columns: 42px minmax(0, 1fr);
  }

  .result-download {
    grid-column: 2;
    justify-self: start;
  }

  .result-facts,
  .evidence-details {
    grid-template-columns: 1fr;
  }

  .result-facts div + div,
  .result-facts div:nth-child(3) {
    border-top: 1px solid var(--line);
    border-left: 0;
  }

  .evidence-details {
    gap: 22px;
  }

  .evidence-details dl > div,
  .boundary dl > div {
    grid-template-columns: 1fr;
    gap: 1px;
  }

  footer {
    flex-direction: column;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}