:root {
  --page:   #D9DEE1;
  --card:   #F1F3F4;
  --ink:    #131A1F;
  --muted:  #5B666D;
  --rule:   #C2C9CD;
  --lamp:   #E0A21A;
  --mono: ui-monospace, "SF Mono", SFMono-Regular, Menlo, Consolas, "Liberation Mono", monospace;
  --sans: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}

@media (prefers-color-scheme: dark) {
  :root {
    --page:   #0D1114;
    --card:   #161B20;
    --ink:    #E6EAEC;
    --muted:  #8B979E;
    --rule:   #262D34;
  }
}

* { box-sizing: border-box; }

html, body { height: 100%; }

body {
  margin: 0;
  padding: clamp(1rem, 4vw, 3rem);
  display: grid;
  place-items: center;
  background: var(--page);
  color: var(--ink);
  font-family: var(--sans);
  -webkit-font-smoothing: antialiased;
}

.panel {
  width: 100%;
  max-width: 34rem;
  background: var(--card);
  border: 1px solid var(--rule);
  padding: clamp(1.75rem, 5vw, 3rem);
}

.eyebrow {
  margin: 0 0 1.5rem;
  font-family: var(--mono);
  font-size: 0.75rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--muted);
  display: flex;
  align-items: center;
  gap: 0.6rem;
}

.lamp {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--lamp);
  flex: none;
}

h1 {
  margin: 0 0 0.85rem;
  font-size: clamp(1.6rem, 6vw, 2.6rem);
  line-height: 1.08;
  letter-spacing: -0.025em;
  font-weight: 650;
  word-break: break-word;
}

.lede {
  margin: 0;
  font-size: 1.0625rem;
  line-height: 1.55;
  color: var(--muted);
}

.foot {
  margin: 2.5rem 0 0;
  padding-top: 1.25rem;
  border-top: 1px solid var(--rule);
  font-family: var(--mono);
  font-size: 0.75rem;
  letter-spacing: 0.06em;
  color: var(--muted);
}

.action {
  display: inline-block;
  margin-top: 2rem;
  font-size: 0.9375rem;
  padding: 0.7rem 1.25rem;
  border: 1px solid var(--ink);
  background: var(--ink);
  color: var(--card);
  text-decoration: none;
}

.action:hover { opacity: 0.85; }

.action:focus-visible {
  outline: 2px solid var(--lamp);
  outline-offset: 2px;
}