:root {
  --bg: #060810;
  --bg-card: #101420;
  --bg-soft: #141928;
  --tx1: #eef0f6;
  --tx2: #7a8099;
  --tx3: #3a3f52;
  --cy: #0ea5c4;
  --cy-glow: rgba(14, 165, 196, 0.1);
  --cy-border: rgba(14, 165, 196, 0.18);
  --bd: rgba(238, 240, 246, 0.08);
  --good: #22c55e;
  --warn: #f59e0b;
  --surface-faint: rgba(255, 255, 255, 0.02);
  --warn-soft: rgba(245, 158, 11, 0.08);
  --warn-ring: rgba(245, 158, 11, 0.12);
  --good-ring: rgba(34, 197, 94, 0.12);
  --demo-bg: #111827;
  --demo-border: rgba(245, 158, 11, 0.18);
  --pass-border: rgba(34, 197, 94, 0.22);
  --pass-text: #86efac;
  --code-fg: #c7d2fe;
  --code-bg: rgba(148, 163, 184, 0.12);
  --shadow: 0 24px 50px rgba(0, 0, 0, 0.28);
  --header-width: 920px;
  --brand-accent: color-mix(in srgb, var(--cy) 78%, white 22%);
}

[data-theme="light"] {
  --bg: #f4f1ea;
  --bg-card: rgba(255, 255, 255, 0.94);
  --bg-soft: rgba(247, 243, 236, 0.94);
  --tx1: #16202c;
  --tx2: #4d5c6d;
  --tx3: #6d7785;
  --cy: #0f78b4;
  --cy-glow: rgba(15, 120, 180, 0.1);
  --cy-border: rgba(15, 120, 180, 0.18);
  --bd: rgba(34, 53, 74, 0.12);
  --surface-faint: rgba(255, 255, 255, 0.5);
  --warn-soft: rgba(245, 158, 11, 0.12);
  --warn-ring: rgba(245, 158, 11, 0.16);
  --good-ring: rgba(34, 197, 94, 0.16);
  --demo-bg: rgba(255, 250, 242, 0.98);
  --demo-border: rgba(245, 158, 11, 0.22);
  --pass-border: rgba(34, 197, 94, 0.24);
  --pass-text: #166534;
  --code-fg: #0f3b5b;
  --code-bg: rgba(15, 120, 180, 0.1);
  --shadow: 0 24px 50px rgba(34, 53, 74, 0.12);
  --brand-accent: color-mix(in srgb, var(--cy) 84%, white 16%);
}

a {
  color: inherit;
  text-decoration: none;
}

body {
  margin: 0;
  font-family: "Geist", system-ui, sans-serif;
  background: radial-gradient(1200px 600px at 50% -200px, rgba(14, 165, 196, 0.16), transparent 60%), var(--bg);
  color: var(--tx1);
}

.wrap {
  width: min(980px, calc(100% - 32px));
  margin: 0 auto;
  padding: 0 0 72px;
}

.site-header {
  margin-bottom: 28px;
}

.site-header .header-inner {
  width: min(var(--header-width), 100%);
}

.header-actions,
.header-nav {
  display: flex;
  align-items: center;
  gap: 1rem;
}

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

.nav-link {
  color: var(--tx2);
  font-size: 0.88rem;
  font-weight: 500;
}

.nav-link:hover {
  color: var(--tx1);
}

.theme-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 40px;
  width: auto;
  height: 40px;
  padding: 0 0.75rem;
  border: 1px solid var(--bd);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.02);
  color: var(--tx2);
  cursor: pointer;
}

.theme-toggle:hover {
  color: var(--tx1);
}

.theme-toggle svg {
  width: 18px;
  height: 18px;
}

.theme-toggle-icon {
  width: 18px;
  height: 18px;
}

.theme-toggle[data-theme-state] {
  width: 40px;
  padding: 0;
}

.verification-main {
  display: grid;
  gap: 18px;
}

.hero {
  text-align: center;
  margin-bottom: 14px;
}

.pill {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 14px;
  border-radius: 999px;
  background: var(--cy-glow);
  border: 1px solid var(--cy-border);
  color: var(--cy);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

h1 {
  margin: 18px 0 10px;
  font-size: clamp(2.4rem, 7vw, 4.2rem);
  line-height: 0.95;
  letter-spacing: -0.04em;
}

.sub {
  max-width: 640px;
  margin: 0 auto;
  color: var(--tx2);
  font-size: 1rem;
  line-height: 1.7;
}

.grid {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 18px;
}

.card {
  background: var(--bg-card);
  border: 1px solid var(--bd);
  border-radius: 24px;
  padding: 24px;
  box-shadow: var(--shadow);
}

.card h2 {
  margin: 0 0 12px;
  font-size: 1rem;
  letter-spacing: -0.02em;
}

.card p,
.card li {
  color: var(--tx2);
  line-height: 1.65;
  font-size: 0.95rem;
}

.steps {
  margin: 0;
  padding-left: 18px;
}

.steps li + li {
  margin-top: 10px;
}

.checks {
  display: grid;
  gap: 12px;
}

.check {
  background: var(--surface-faint);
  border: 1px solid var(--bd);
  border-radius: 18px;
  padding: 14px 16px;
}

.check strong {
  display: block;
  margin-bottom: 4px;
  color: var(--tx1);
}

.label {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 10px;
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--tx3);
}

.dot {
  width: 8px;
  height: 8px;
  border-radius: 999px;
  background: var(--warn);
  box-shadow: 0 0 0 6px var(--warn-ring);
}

.pass .dot {
  background: var(--good);
  box-shadow: 0 0 0 6px var(--good-ring);
}

.demo-card {
  background: var(--demo-bg);
  border: 1px solid var(--demo-border);
}

.demo-card.pass {
  border-color: var(--pass-border);
}

.demo-card.pass .label {
  color: var(--pass-text);
}

.restricted-css {
  user-select: none;
  -webkit-user-select: none;
  background: var(--warn-soft);
}

.dynamic-output > * + * {
  margin-top: 12px;
}

code {
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: 0.88em;
  color: var(--code-fg);
  background: var(--code-bg);
  border-radius: 8px;
  padding: 0.12rem 0.38rem;
}

.action-btn {
  margin-top: 8px;
  padding: 12px 16px;
  border-radius: 14px;
  border: 1px solid var(--cy-border);
  background: var(--cy-glow);
  color: var(--tx1);
  font: inherit;
  font-weight: 600;
  cursor: pointer;
}

.dynamic-output {
  margin-top: 16px;
}

.footer-note {
  text-align: center;
  color: var(--tx3);
  font-size: 0.85rem;
}

.site-footer {
  margin-top: 2rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--bd);
  text-align: center;
}

.fine-print {
  margin-top: 0.55rem;
}

@media (max-width: 760px) {
  .site-header .header-inner {
    align-items: flex-start;
  }

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