:root {
  --bg: #f4f5f7;
  --bg-elevated: #ffffff;
  --bg-inset: #f0f1f4;
  --border: #e2e4e9;
  --text: #14161a;
  --text-muted: #62676f;
  --text-faint: #8a8f98;
  --accent: #3452ff;
  --accent-contrast: #ffffff;

  --risk-low-bg: #e8f7ee;
  --risk-low-fg: #14803c;
  --risk-medium-bg: #fdf3e2;
  --risk-medium-fg: #9a6300;
  --risk-high-bg: #fbe9e9;
  --risk-high-fg: #b3261e;
  --risk-indeterminate-bg: #eceef1;
  --risk-indeterminate-fg: #565b64;

  --ok-fg: #14803c;
  --warn-fg: #9a6300;
  --fail-fg: #b3261e;
  --muted-fg: #8a8f98;

  --radius-lg: 16px;
  --radius-md: 10px;
  --radius-sm: 7px;
  --shadow-card: 0 1px 2px rgba(20, 22, 26, 0.04), 0 8px 24px -12px rgba(20, 22, 26, 0.12);

  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Inter, Roboto, Helvetica, Arial, sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, "Liberation Mono", monospace;

  color-scheme: light;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #0b0c0f;
    --bg-elevated: #16181d;
    --bg-inset: #1d2027;
    --border: #262a32;
    --text: #eef0f3;
    --text-muted: #9aa0aa;
    --text-faint: #6b7078;
    --accent: #7d94ff;
    --accent-contrast: #0b0c0f;

    --risk-low-bg: #113321;
    --risk-low-fg: #4ade80;
    --risk-medium-bg: #3a2b0d;
    --risk-medium-fg: #fbbf24;
    --risk-high-bg: #3a1616;
    --risk-high-fg: #f87171;
    --risk-indeterminate-bg: #23262d;
    --risk-indeterminate-fg: #b0b5bd;

    --ok-fg: #4ade80;
    --warn-fg: #fbbf24;
    --fail-fg: #f87171;
    --muted-fg: #6b7078;

    --shadow-card: 0 1px 2px rgba(0, 0, 0, 0.3), 0 8px 24px -12px rgba(0, 0, 0, 0.5);
    color-scheme: dark;
  }
}

:root[data-theme="dark"] {
  --bg: #0b0c0f;
  --bg-elevated: #16181d;
  --bg-inset: #1d2027;
  --border: #262a32;
  --text: #eef0f3;
  --text-muted: #9aa0aa;
  --text-faint: #6b7078;
  --accent: #7d94ff;
  --accent-contrast: #0b0c0f;
  --risk-low-bg: #113321;
  --risk-low-fg: #4ade80;
  --risk-medium-bg: #3a2b0d;
  --risk-medium-fg: #fbbf24;
  --risk-high-bg: #3a1616;
  --risk-high-fg: #f87171;
  --risk-indeterminate-bg: #23262d;
  --risk-indeterminate-fg: #b0b5bd;
  --ok-fg: #4ade80;
  --warn-fg: #fbbf24;
  --fail-fg: #f87171;
  --muted-fg: #6b7078;
  --shadow-card: 0 1px 2px rgba(0, 0, 0, 0.3), 0 8px 24px -12px rgba(0, 0, 0, 0.5);
  color-scheme: dark;
}

* { box-sizing: border-box; }

/* Author rules like `.skeleton { display: flex }` tie in specificity with the
   UA `[hidden] { display: none }` rule and can win on cascade order - force it. */
[hidden] { display: none !important; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-sans);
  -webkit-font-smoothing: antialiased;
}

body {
  min-height: 100vh;
}

.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;
}

.page {
  max-width: 760px;
  margin: 0 auto;
  padding: 40px 20px 64px;
}

.page__header {
  margin-bottom: 28px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 14px;
}

.brand__mark {
  flex: none;
  width: 40px;
  height: 40px;
  border-radius: var(--radius-md);
  background: var(--accent);
  color: var(--accent-contrast);
  display: flex;
  align-items: center;
  justify-content: center;
}

.brand__mark svg {
  width: 22px;
  height: 22px;
}

h1 {
  font-size: 20px;
  font-weight: 650;
  margin: 0 0 2px;
  letter-spacing: -0.01em;
}

.brand__subtitle {
  margin: 0;
  font-size: 13.5px;
  color: var(--text-muted);
}

.search {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  align-items: center;
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 12px;
  box-shadow: var(--shadow-card);
}

.search__field {
  flex: 1 1 320px;
}

.search__field input {
  width: 100%;
  border: 1px solid var(--border);
  background: var(--bg-inset);
  color: var(--text);
  border-radius: var(--radius-md);
  padding: 11px 13px;
  font: 14px/1.4 var(--font-mono);
  outline: none;
  transition: border-color 0.15s ease, box-shadow 0.15s ease;
}

.search__field input:focus-visible {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--accent) 25%, transparent);
}

.search__field input:invalid:not(:placeholder-shown) {
  border-color: var(--fail-fg);
}

.search__networks {
  display: flex;
  gap: 8px;
  border: none;
  padding: 0;
  margin: 0;
}

.chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 13px;
  color: var(--text-muted);
  background: var(--bg-inset);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 7px 12px 7px 9px;
  cursor: pointer;
  user-select: none;
  transition: color 0.15s ease, border-color 0.15s ease;
}

.chip:has(input:checked) {
  color: var(--text);
  border-color: var(--accent);
}

.chip input {
  accent-color: var(--accent);
}

button#submit-btn {
  flex: none;
  background: var(--accent);
  color: var(--accent-contrast);
  border: none;
  border-radius: var(--radius-md);
  padding: 11px 18px;
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  transition: opacity 0.15s ease, transform 0.05s ease;
}

button#submit-btn:hover { opacity: 0.9; }
button#submit-btn:active { transform: translateY(1px); }
button#submit-btn:disabled { opacity: 0.55; cursor: progress; }

.error {
  margin: 16px 2px 0;
  color: var(--fail-fg);
  font-size: 13.5px;
}

.error--inline {
  margin: 8px 0 0;
}

/* ---------- skeleton ---------- */

.skeleton {
  margin-top: 22px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.skeleton__row,
.skeleton__card {
  border-radius: var(--radius-md);
  background: linear-gradient(90deg, var(--bg-inset) 25%, var(--border) 37%, var(--bg-inset) 63%);
  background-size: 400% 100%;
  animation: shimmer 1.4s ease infinite;
}

.skeleton__row { height: 20px; }
.skeleton__row--wide { width: 60%; height: 28px; }

.skeleton__grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}

.skeleton__card { height: 220px; }

@media (max-width: 620px) {
  .skeleton__grid { grid-template-columns: 1fr; }
}

@keyframes shimmer {
  0% { background-position: 100% 0; }
  100% { background-position: -100% 0; }
}

/* ---------- report ---------- */

.report {
  margin-top: 22px;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.summary-card {
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 18px 20px;
  box-shadow: var(--shadow-card);
}

.summary-card__top {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
}

.summary-card__address {
  font-family: var(--font-mono);
  font-size: 14px;
  word-break: break-all;
}

.summary-card__meta {
  color: var(--text-faint);
  font-size: 12.5px;
  margin-top: 4px;
}

.risk-badge {
  flex: none;
  display: inline-flex;
  align-items: center;
  gap: 7px;
  font-size: 13px;
  font-weight: 650;
  padding: 7px 13px;
  border-radius: 999px;
  letter-spacing: 0.01em;
}

.risk-badge__dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: currentColor;
}

.risk-badge--low { background: var(--risk-low-bg); color: var(--risk-low-fg); }
.risk-badge--medium { background: var(--risk-medium-bg); color: var(--risk-medium-fg); }
.risk-badge--high { background: var(--risk-high-bg); color: var(--risk-high-fg); }
.risk-badge--indeterminate { background: var(--risk-indeterminate-bg); color: var(--risk-indeterminate-fg); }

.factors {
  margin: 14px 0 0;
  padding: 0;
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.factors li {
  font-size: 13px;
  line-height: 1.5;
  padding: 9px 11px;
  border-radius: var(--radius-sm);
  background: var(--bg-inset);
  border: 1px solid var(--border);
}

.factors code {
  font-family: var(--font-mono);
  font-size: 11.5px;
  color: var(--text-faint);
  display: block;
  margin-bottom: 3px;
}

.ofac-row {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13.5px;
  margin-top: 12px;
  flex-wrap: wrap;
}

.status-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  flex: none;
}

.status-dot--ok { background: var(--ok-fg); }
.status-dot--warn { background: var(--warn-fg); }
.status-dot--fail { background: var(--fail-fg); }

.grid-2 {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

@media (max-width: 620px) {
  .grid-2 { grid-template-columns: 1fr; }
}

.chain-card {
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 16px 18px;
  box-shadow: var(--shadow-card);
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.chain-card__header {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}

.chain-card__title {
  font-size: 14.5px;
  font-weight: 650;
  margin: 0;
  flex: 1;
}

.badge {
  font-size: 10.5px;
  font-weight: 650;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  padding: 3px 8px;
  border-radius: 999px;
  background: var(--bg-inset);
  color: var(--text-faint);
  border: 1px solid var(--border);
}

.badge--status.is-ok { color: var(--ok-fg); }
.badge--status.is-fail { color: var(--fail-fg); }

.chain-card__section h4 {
  font-size: 11.5px;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--text-faint);
  margin: 0 0 8px;
  font-weight: 650;
}

.kv {
  margin: 0;
  display: grid;
  gap: 6px;
}

.kv__row {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
  font-size: 13.5px;
}

.kv__row dt {
  color: var(--text-muted);
}

.kv__row dd {
  margin: 0;
  text-align: right;
}

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

.caveat {
  margin: 8px 0 0;
  font-size: 12px;
  color: var(--warn-fg);
  background: var(--risk-medium-bg);
  border-radius: var(--radius-sm);
  padding: 8px 10px;
  line-height: 1.5;
}

.sources-strip {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 16px;
  font-size: 12.5px;
  color: var(--text-muted);
}

.sources-strip span {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.unavailable-list {
  margin: 0;
  padding: 0;
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.unavailable-list li {
  font-size: 12.5px;
  color: var(--text-faint);
  line-height: 1.5;
}

.unavailable-list strong {
  color: var(--text-muted);
  font-weight: 600;
}

.disclaimer {
  font-size: 12px;
  color: var(--text-faint);
  line-height: 1.6;
  padding: 2px 2px 0;
}

.page__footer {
  margin-top: 40px;
  text-align: center;
}

.page__footer p {
  font-size: 12px;
  color: var(--text-faint);
  line-height: 1.6;
}