:root {
  color-scheme: dark;
  --ink: #f5f8ff;
  --muted: #aab6ca;
  --quiet: #7f8ca3;
  --page: #08111f;
  --surface: #0d192a;
  --surface-2: #111f33;
  --line: #26364e;
  --accent: #6ef2c2;
  --accent-strong: #2bd29a;
  --accent-ink: #03120d;
  --blue: #78a9ff;
  --warning: #ffd166;
  --danger: #ff8f9c;
  --success: #6ef2c2;
  --radius: 24px;
  --shadow: 0 28px 90px rgba(0, 0, 0, 0.34);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  min-width: 320px;
  background:
    radial-gradient(circle at 12% 4%, rgba(58, 109, 184, 0.2), transparent 29rem),
    radial-gradient(circle at 88% 18%, rgba(43, 210, 154, 0.1), transparent 24rem),
    var(--page);
  color: var(--ink);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.55;
}

button, select { font: inherit; }
button { touch-action: manipulation; }
a { color: inherit; }
[hidden] { display: none !important; }

.skip-link {
  position: fixed;
  z-index: 50;
  top: 1rem;
  left: 1rem;
  padding: 0.7rem 1rem;
  transform: translateY(-180%);
  border-radius: 10px;
  background: var(--accent);
  color: var(--accent-ink);
  font-weight: 800;
}
.skip-link:focus { transform: translateY(0); }

.site-header {
  width: min(1180px, calc(100% - 3rem));
  margin: 0 auto;
  padding: 1.5rem 0;
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.wordmark {
  display: inline-flex;
  gap: 0.7rem;
  align-items: center;
  text-decoration: none;
  font-size: 0.95rem;
  font-weight: 750;
  letter-spacing: -0.01em;
}
.wordmark-mark {
  display: grid;
  width: 2rem;
  height: 2rem;
  place-items: center;
  border: 1px solid rgba(110, 242, 194, 0.5);
  border-radius: 9px;
  background: rgba(110, 242, 194, 0.1);
  color: var(--accent);
  font-size: 0.72rem;
  letter-spacing: 0.04em;
}
.proof-badge {
  display: inline-flex;
  gap: 0.55rem;
  align-items: center;
  padding: 0.45rem 0.7rem;
  border: 1px solid var(--line);
  border-radius: 999px;
  color: var(--muted);
  font-size: 0.78rem;
  font-weight: 700;
}
.proof-badge span, .live-dot {
  width: 0.5rem;
  height: 0.5rem;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 0 5px rgba(110, 242, 194, 0.08);
}

main { overflow: hidden; }
.hero {
  width: min(940px, calc(100% - 3rem));
  margin: 0 auto;
  padding: 7.3rem 0 5.7rem;
  text-align: center;
}
.eyebrow {
  margin: 0 0 0.9rem;
  color: var(--accent);
  font-size: 0.77rem;
  font-weight: 800;
  letter-spacing: 0.15em;
  text-transform: uppercase;
}
h1, h2, h3, h4, p { overflow-wrap: anywhere; }
h1 {
  margin: 0;
  font-size: clamp(2.6rem, 7vw, 5.8rem);
  font-weight: 780;
  line-height: 0.98;
  letter-spacing: -0.065em;
}
h1 span { color: var(--muted); }
.hero-copy {
  max-width: 690px;
  margin: 1.7rem auto 0;
  color: var(--muted);
  font-size: clamp(1rem, 2vw, 1.18rem);
}
.simulation-notice {
  width: fit-content;
  max-width: 720px;
  margin: 2rem auto 0;
  padding: 0.8rem 1rem;
  display: flex;
  gap: 0.7rem;
  align-items: flex-start;
  border: 1px solid rgba(255, 209, 102, 0.32);
  border-radius: 14px;
  background: rgba(255, 209, 102, 0.07);
  color: #e5d7ad;
  text-align: left;
  font-size: 0.84rem;
}
.simulation-notice svg { flex: 0 0 auto; fill: var(--warning); }
.simulation-notice p { margin: 0; }

.demo-section, .coverage-section {
  width: min(1180px, calc(100% - 3rem));
  margin: 0 auto;
  padding: 5rem 0;
}
.section-heading {
  margin-bottom: 2rem;
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(260px, 430px);
  gap: 2rem;
  align-items: end;
}
.section-heading h2 {
  margin: 0;
  font-size: clamp(2rem, 5vw, 3.5rem);
  line-height: 1;
  letter-spacing: -0.045em;
}
.section-heading > p { margin: 0; color: var(--muted); }

.demo-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.55fr) minmax(300px, 0.9fr);
  gap: 1.25rem;
  align-items: start;
}
.transaction-card, .evidence-card {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: linear-gradient(145deg, rgba(17, 31, 51, 0.96), rgba(11, 23, 39, 0.98));
  box-shadow: var(--shadow);
}
.transaction-card { padding: clamp(1.2rem, 4vw, 2rem); }
.evidence-card { padding: 1.5rem; }
.card-header {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  align-items: flex-start;
}
.card-header.compact { align-items: center; }
.card-kicker {
  margin: 0 0 0.2rem;
  color: var(--quiet);
  font-size: 0.75rem;
  font-weight: 800;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}
.card-header h3 { margin: 0; font-size: 1.5rem; letter-spacing: -0.025em; }
.state-pill {
  padding: 0.45rem 0.7rem;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: rgba(120, 169, 255, 0.08);
  color: var(--blue);
  font-size: 0.76rem;
  font-weight: 800;
}
.state-pill[data-state="confirmed"] { background: rgba(110, 242, 194, 0.09); color: var(--success); }
.state-pill[data-state="failed"], .state-pill[data-state="timedOut"], .state-pill[data-state="wrongNetwork"] { background: rgba(255, 143, 156, 0.08); color: var(--danger); }

.stepper {
  margin: 2rem 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  list-style: none;
}
.stepper li {
  position: relative;
  display: grid;
  gap: 0.45rem;
  justify-items: center;
  color: var(--quiet);
  font-size: 0.72rem;
}
.stepper li::before {
  position: absolute;
  z-index: 0;
  top: 0.78rem;
  left: calc(-50% + 0.8rem);
  width: calc(100% - 1.6rem);
  height: 1px;
  background: var(--line);
  content: "";
}
.stepper li:first-child::before { display: none; }
.stepper li span {
  position: relative;
  z-index: 1;
  display: grid;
  width: 1.65rem;
  height: 1.65rem;
  place-items: center;
  border: 1px solid var(--line);
  border-radius: 50%;
  background: var(--surface-2);
  font-size: 0.7rem;
}
.stepper li.is-active, .stepper li.is-complete { color: var(--ink); }
.stepper li.is-active span { border-color: var(--accent); color: var(--accent); box-shadow: 0 0 0 5px rgba(110, 242, 194, 0.08); }
.stepper li.is-complete span { border-color: var(--accent-strong); background: var(--accent-strong); color: var(--accent-ink); }

.network-panel {
  padding: 0.9rem 1rem;
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  gap: 0.8rem;
  align-items: center;
  border: 1px solid var(--line);
  border-radius: 15px;
  background: rgba(3, 10, 20, 0.28);
}
.network-panel > div:last-child { text-align: right; }
.network-panel span { display: block; color: var(--quiet); font-size: 0.7rem; }
.network-panel strong { font-size: 0.88rem; }
.network-panel svg { fill: var(--quiet); }
.network-wrong { color: var(--danger); }

.controls-grid {
  margin: 1rem 0;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.8rem;
}
.controls-grid label, .network-control {
  display: grid;
  gap: 0.45rem;
}
.controls-grid label > span, .network-control > span { color: var(--muted); font-size: 0.75rem; font-weight: 700; }
select, .button {
  min-height: 2.85rem;
  border-radius: 11px;
}
select {
  width: 100%;
  padding: 0 2.5rem 0 0.8rem;
  border: 1px solid var(--line);
  background: var(--surface-2);
  color: var(--ink);
}

.status-box {
  min-height: 5.4rem;
  padding: 1rem;
  display: flex;
  gap: 0.8rem;
  align-items: flex-start;
  border: 1px solid rgba(120, 169, 255, 0.25);
  border-radius: 15px;
  background: rgba(120, 169, 255, 0.06);
}
.status-box svg { flex: 0 0 auto; fill: var(--blue); }
.status-box strong { display: block; font-size: 0.94rem; }
.status-box p { margin: 0.2rem 0 0; color: var(--muted); font-size: 0.81rem; }
.status-box[data-state="confirmed"] { border-color: rgba(110, 242, 194, 0.26); background: rgba(110, 242, 194, 0.06); }
.status-box[data-state="confirmed"] svg { fill: var(--success); }
.status-box[data-state="failed"], .status-box[data-state="timedOut"], .status-box[data-state="wrongNetwork"] { border-color: rgba(255, 143, 156, 0.26); background: rgba(255, 143, 156, 0.05); }
.status-box[data-state="failed"] svg, .status-box[data-state="timedOut"] svg, .status-box[data-state="wrongNetwork"] svg { fill: var(--danger); }

.action-stack { margin-top: 1rem; display: grid; gap: 0.65rem; }
.approval-actions { display: grid; grid-template-columns: 1.5fr 1fr; gap: 0.65rem; }
.button {
  padding: 0.7rem 1rem;
  border: 1px solid transparent;
  cursor: pointer;
  font-weight: 800;
  transition: transform 160ms ease, border-color 160ms ease, background 160ms ease;
}
.button:hover:not(:disabled) { transform: translateY(-1px); }
.button:active:not(:disabled) { transform: translateY(0); }
.button:disabled { cursor: not-allowed; opacity: 0.48; }
.button-primary { background: var(--accent); color: var(--accent-ink); }
.button-primary:hover:not(:disabled) { background: #8cf7cf; }
.button-secondary, .button-quiet { border-color: var(--line); background: rgba(255,255,255,0.025); color: var(--ink); }
.button-warning { border-color: rgba(255, 209, 102, 0.34); background: rgba(255, 209, 102, 0.08); color: var(--warning); }
.keyboard-note { margin: 0.85rem 0 0; color: var(--quiet); font-size: 0.7rem; text-align: center; }

.metrics {
  margin: 1.5rem 0;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.6rem;
}
.metrics div { padding: 0.75rem; border: 1px solid var(--line); border-radius: 13px; background: rgba(3,10,20,0.26); }
.metrics dt { color: var(--quiet); font-size: 0.64rem; line-height: 1.25; }
.metrics dd { margin: 0.25rem 0 0; font-size: 1.35rem; font-weight: 800; }
.metrics .metric-accent dd { color: var(--warning); }
.event-log { min-height: 19rem; padding: 1rem; border: 1px solid var(--line); border-radius: 15px; background: rgba(3,10,20,0.26); }
.log-heading { display: flex; justify-content: space-between; align-items: baseline; gap: 1rem; }
.log-heading h4 { margin: 0; font-size: 0.86rem; }
.log-heading span { color: var(--quiet); font-size: 0.65rem; }
.event-log ol { margin: 1rem 0 0; padding: 0; display: grid; gap: 0.82rem; list-style: none; }
.event-log li { display: grid; grid-template-columns: 2.8rem 1fr; gap: 0.5rem; color: var(--muted); font-size: 0.73rem; }
.event-log time { color: var(--quiet); font-variant-numeric: tabular-nums; }
.guard-note { margin-top: 1rem; padding: 0.95rem; display: flex; gap: 0.7rem; border-radius: 15px; background: rgba(110, 242, 194, 0.07); color: var(--muted); font-size: 0.75rem; }
.guard-note svg { flex: 0 0 auto; fill: var(--accent); }
.guard-note p { margin: 0; }
.guard-note strong { color: var(--ink); }

.coverage-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1rem; }
.coverage-grid article { padding: 1.4rem; border-top: 1px solid var(--line); }
.coverage-grid article > span { color: var(--accent); font-family: ui-monospace, SFMono-Regular, Menlo, monospace; font-size: 0.72rem; }
.coverage-grid h3 { margin: 0.8rem 0 0.4rem; font-size: 1rem; }
.coverage-grid p { margin: 0; color: var(--muted); font-size: 0.82rem; }

footer {
  width: min(1180px, calc(100% - 3rem));
  margin: 4rem auto 0;
  padding: 1.5rem 0 2.5rem;
  display: flex;
  justify-content: space-between;
  gap: 2rem;
  border-top: 1px solid var(--line);
  color: var(--quiet);
  font-size: 0.72rem;
}
footer p { margin: 0; }

button:focus-visible, select:focus-visible, a:focus-visible {
  outline: 3px solid var(--warning);
  outline-offset: 3px;
}

@media (max-width: 900px) {
  .demo-grid { grid-template-columns: 1fr; }
  .evidence-card { order: 2; }
  .event-log { min-height: 0; }
  .coverage-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 640px) {
  .site-header, .hero, .demo-section, .coverage-section, footer { width: min(100% - 2rem, 1180px); }
  .proof-badge { font-size: 0; }
  .hero { padding: 5rem 0 3.5rem; text-align: left; }
  h1 { font-size: clamp(2.5rem, 14vw, 4rem); }
  .simulation-notice { margin-left: 0; }
  .section-heading { grid-template-columns: 1fr; gap: 0.8rem; }
  .controls-grid, .coverage-grid { grid-template-columns: 1fr; }
  .metrics { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .metrics div { padding: 0.6rem; }
  .metrics dt { min-height: 2.4em; }
  .stepper strong { font-size: 0.65rem; }
  footer { flex-direction: column; gap: 0.4rem; }
}

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