:root {
  color-scheme: light;
  --bg: #f4f7fb;
  --surface: #ffffff;
  --surface-soft: #eef4fb;
  --surface-ink: #111827;
  --text: #101828;
  --muted: #53657d;
  --line: #d4deeb;
  --line-strong: #b9c8dc;
  --accent: #ff7a35;
  --accent-dark: #d85f20;
  --blue: #2455d6;
  --green: #188657;
  --yellow: #b7791f;
  --red: #bd3a3a;
  --shadow: 0 22px 70px rgba(26, 44, 77, 0.12);
  --radius: 8px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--text);
  background: var(--bg);
  font-family: Inter, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  letter-spacing: 0;
}

button,
input,
select {
  font: inherit;
}

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

.skip-link {
  position: fixed;
  left: 16px;
  top: 12px;
  z-index: 10;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip-path: inset(50%);
  opacity: 0;
  pointer-events: none;
  transform: translateY(-200%);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 10px 14px;
  background: var(--surface);
  color: var(--text);
}

.skip-link:focus-visible {
  width: auto;
  height: auto;
  overflow: visible;
  clip-path: none;
  opacity: 1;
  pointer-events: auto;
  transform: translateY(0);
}

.site-nav,
.site-footer,
main > section {
  width: min(1180px, calc(100vw - 32px));
  margin: 0 auto;
}

.site-nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 18px 0;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  min-width: 0;
}

.brand img:last-child {
  height: 32px;
  width: auto;
}

.site-nav nav,
.site-footer {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
}

.site-nav nav a,
.site-footer a,
.site-footer span {
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 9px 12px;
  background: rgba(255, 255, 255, 0.74);
  color: var(--muted);
  font-size: 0.86rem;
  font-weight: 650;
}

.site-nav nav a:hover,
.site-footer a:hover {
  border-color: var(--line-strong);
  color: var(--text);
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.06fr) minmax(360px, 0.94fr);
  gap: 28px;
  align-items: stretch;
  min-height: calc(100svh - 94px);
  padding: 48px 0 30px;
}

.hero-copy,
.hero-flow,
.gate-form,
.result-panel,
.packet-output,
.use-case-grid article {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
  box-shadow: var(--shadow);
}

.hero-copy {
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: clamp(28px, 5vw, 56px);
}

.eyebrow,
.panel-label,
.flow-node span,
.use-case-grid span {
  display: inline-flex;
  align-items: center;
  color: var(--blue);
  font-family: "IBM Plex Mono", ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: 0.72rem;
  font-weight: 650;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

h1,
h2,
h3,
p {
  margin: 0;
}

h1,
h2,
h3 {
  font-family: "Inter Tight", Inter, system-ui, sans-serif;
  letter-spacing: 0;
}

h1 {
  max-width: 11ch;
  margin-top: 18px;
  font-size: clamp(3rem, 8vw, 6.5rem);
  line-height: 0.92;
}

h2 {
  font-size: clamp(2rem, 3.8vw, 3.35rem);
  line-height: 1;
}

h3 {
  font-size: 1.18rem;
  line-height: 1.15;
}

.hero-lede,
.section-heading p,
.flow-node p,
.use-case-grid p,
.wallet-status {
  color: var(--muted);
  line-height: 1.6;
}

.hero-lede {
  max-width: 670px;
  margin-top: 20px;
  font-size: 1.08rem;
}

.hero-actions,
.form-actions,
.anchor-actions {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
}

.hero-actions {
  margin-top: 28px;
}

.button {
  display: inline-flex;
  min-height: 44px;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
  padding: 0 16px;
  cursor: pointer;
  font-weight: 760;
  color: var(--text);
  background: var(--surface);
  transition: transform 150ms ease, border-color 150ms ease, background-color 150ms ease;
}

.button:hover,
.button:focus-visible {
  transform: translateY(-1px);
  border-color: #9fb1c9;
  outline: none;
}

.button.primary {
  border-color: var(--accent);
  color: #ffffff;
  background: var(--accent);
}

.button.primary:hover,
.button.primary:focus-visible {
  border-color: var(--accent-dark);
  background: var(--accent-dark);
}

.button.secondary {
  background: #f9fbfe;
}

.hero-flow {
  display: grid;
  gap: 12px;
  align-content: center;
  padding: clamp(18px, 3vw, 32px);
}

.flow-node {
  position: relative;
  display: grid;
  grid-template-columns: 48px minmax(0, 1fr);
  column-gap: 14px;
  row-gap: 2px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 16px;
  background: #fbfdff;
}

.flow-node.is-active {
  border-color: rgba(36, 85, 214, 0.34);
  background: #eef4ff;
}

.flow-node span {
  grid-row: span 2;
  justify-content: center;
  width: 42px;
  height: 42px;
  border-radius: 50%;
  background: #e5edff;
  color: var(--blue);
}

.flow-node strong {
  font-size: 1rem;
}

.flow-node p {
  font-size: 0.94rem;
}

.demo-section,
.packet-section,
.use-cases {
  padding: 58px 0;
}

.section-heading {
  display: grid;
  gap: 12px;
  margin-bottom: 22px;
}

.section-heading p {
  max-width: 760px;
}

.demo-grid {
  display: grid;
  grid-template-columns: minmax(320px, 0.85fr) minmax(360px, 1.15fr);
  gap: 22px;
  align-items: start;
}

.gate-form,
.result-panel {
  padding: clamp(18px, 3vw, 26px);
}

.gate-form {
  display: grid;
  gap: 18px;
}

.field-row {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
}

.field-group {
  display: grid;
  gap: 8px;
}

label,
legend {
  color: #2c3a4f;
  font-size: 0.86rem;
  font-weight: 760;
}

input,
select {
  width: 100%;
  min-height: 44px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 10px 12px;
  background: #fbfdff;
  color: var(--text);
}

input:focus,
select:focus {
  border-color: var(--blue);
  outline: 3px solid rgba(36, 85, 214, 0.14);
}

fieldset {
  display: grid;
  gap: 10px;
  margin: 0;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 14px;
}

legend {
  padding: 0 6px;
}

.check-row {
  display: grid;
  grid-template-columns: 18px minmax(0, 1fr);
  gap: 10px;
  align-items: start;
  color: var(--text);
  font-weight: 600;
}

.check-row input {
  width: 18px;
  min-height: 18px;
  margin-top: 2px;
}

.result-panel {
  display: grid;
  gap: 18px;
}

.result-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  border-bottom: 1px solid var(--line);
  padding-bottom: 18px;
}

.result-head strong {
  display: block;
  margin-top: 6px;
  font-family: "Inter Tight", Inter, sans-serif;
  font-size: clamp(2.2rem, 5vw, 4rem);
  line-height: 0.9;
}

.confidence-pill {
  display: inline-flex;
  border-radius: 999px;
  padding: 8px 10px;
  background: #e9f8ef;
  color: var(--green);
  font-family: "IBM Plex Mono", ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: 0.76rem;
  font-weight: 650;
  white-space: nowrap;
}

.metric-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 10px;
  margin: 0;
}

.metric-grid div {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 12px;
  background: #fbfdff;
}

.metric-grid dt {
  color: var(--muted);
  font-size: 0.76rem;
  font-weight: 700;
}

.metric-grid dd {
  margin: 7px 0 0;
  font-family: "IBM Plex Mono", ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: 0.86rem;
  font-weight: 650;
  overflow-wrap: anywhere;
}

.gate-reasons {
  display: grid;
  gap: 8px;
}

.reason-item {
  border-left: 3px solid var(--green);
  padding: 9px 12px;
  background: #f3fbf6;
  color: #244133;
  font-size: 0.92rem;
  line-height: 1.45;
}

.result-panel[data-verdict="DEFER"] .reason-item,
.result-panel[data-verdict="DEFER"] .confidence-pill {
  border-left-color: var(--yellow);
  background: #fff8e8;
  color: #77510f;
}

.result-panel[data-verdict="BLOCK"] .reason-item,
.result-panel[data-verdict="BLOCK"] .confidence-pill {
  border-left-color: var(--red);
  background: #fff0f0;
  color: #8b2525;
}

.memo-preview {
  display: grid;
  gap: 8px;
}

.memo-preview code {
  display: block;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 12px;
  background: var(--surface-ink);
  color: #f4f7fb;
  font-family: "IBM Plex Mono", ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: 0.78rem;
  line-height: 1.5;
  overflow-wrap: anywhere;
}

.wallet-status {
  min-height: 24px;
  font-size: 0.9rem;
}

.wallet-status.is-error {
  color: var(--red);
}

.wallet-status.is-ok {
  color: var(--green);
}

.explorer-link {
  justify-self: start;
  color: var(--blue);
  font-weight: 760;
}

.packet-output {
  margin: 0;
  max-height: 540px;
  overflow: auto;
  padding: 18px;
  color: #eaf1ff;
  background: #111827;
  font-family: "IBM Plex Mono", ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: 0.8rem;
  line-height: 1.58;
  white-space: pre-wrap;
  overflow-wrap: anywhere;
}

.use-case-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
}

.use-case-grid article {
  display: grid;
  gap: 10px;
  padding: 22px;
  box-shadow: none;
}

.site-footer {
  justify-content: space-between;
  padding: 42px 0;
}

@media (max-width: 920px) {
  .hero,
  .demo-grid,
  .use-case-grid {
    grid-template-columns: 1fr;
  }

  .hero {
    min-height: auto;
    padding-top: 24px;
  }

  h1 {
    max-width: 12ch;
  }
}

@media (max-width: 680px) {
  .site-nav {
    align-items: flex-start;
    flex-direction: column;
  }

  .site-nav nav {
    width: 100%;
  }

  .site-nav nav a {
    flex: 1;
    justify-content: center;
    text-align: center;
  }

  .hero-copy {
    padding: 24px;
  }

  h1 {
    font-size: 3rem;
  }

  .field-row,
  .metric-grid {
    grid-template-columns: 1fr;
  }

  .result-head {
    align-items: flex-start;
    flex-direction: column;
  }

  .button {
    width: 100%;
  }

  .site-footer {
    align-items: stretch;
    flex-direction: column;
  }

  .site-footer a,
  .site-footer span {
    text-align: center;
  }
}