:root {
  color-scheme: light;
  --paper: #ECEDEA;
  --card: #F6F7F4;
  --ink: #15181A;
  --steel: #565F63;
  --steel-dim: #8A9195;
  --line: #D3D6D1;
  --rec: #C1392B;
  --rec-dim: rgba(193, 57, 43, .10);
  --vault: #1B2022;
  --vault-ink: #EDEEEA;
  --vault-line: #33393B;
}

* { box-sizing: border-box; }

html, body { height: 100%; }

body {
  margin: 0;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  background: var(--paper);
  color: var(--ink);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Inter", "Helvetica Neue", Arial, sans-serif;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

main { flex: 1 0 auto; }
footer.vault { flex: none; }

.mono {
  font-family: ui-monospace, "SF Mono", "Cascadia Code", "Roboto Mono", Consolas, "Courier New", monospace;
}

a:focus-visible, button:focus-visible, input:focus-visible {
  outline: 2px solid var(--rec);
  outline-offset: 2px;
}

.wrap { max-width: 42rem; margin: 0 auto; padding: 0 1.5rem; }

/* ---------- header ---------- */

header.bar {
  padding: 1.6rem 0 0;
}
header.bar .wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.wordmark {
  font-weight: 700;
  font-size: 1.05rem;
  letter-spacing: -.01em;
}
.rec {
  display: flex;
  align-items: center;
  gap: .45rem;
  font-size: .72rem;
  letter-spacing: .08em;
  color: var(--steel);
  text-transform: uppercase;
}
.rec .dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--rec);
  animation: pulse 2.4s ease-in-out infinite;
}
.rec .tc {
  font-variant-numeric: tabular-nums;
  color: var(--steel);
}
@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: .35; }
}

/* ---------- hero ---------- */

.hero {
  padding: 5.2rem 0 3.6rem;
  opacity: 0;
  transform: translateY(10px);
  animation: rise .6s ease forwards .05s;
}
@keyframes rise {
  to { opacity: 1; transform: none; }
}
.hero h1 {
  font-size: clamp(2rem, 5vw, 2.9rem);
  font-weight: 700;
  letter-spacing: -.02em;
  line-height: 1.08;
  margin: 0 0 1rem;
  max-width: 26rem;
}
.hero .lede {
  color: var(--steel);
  font-size: 1.05rem;
  max-width: 28rem;
  margin: 0 0 2.2rem;
}

form.unlock { max-width: 30rem; }
.field {
  display: flex;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: .3rem .3rem .3rem 1rem;
  transition: border-color .15s ease;
}
.field:focus-within { border-color: var(--ink); }
.field.error { border-color: var(--rec); }

#code {
  flex: 1;
  border: none;
  background: none;
  font: inherit;
  font-family: ui-monospace, "SF Mono", "Cascadia Code", "Roboto Mono", Consolas, monospace;
  font-size: .95rem;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--ink);
  padding: .75rem .5rem;
  min-width: 0;
}
#code::placeholder {
  color: var(--steel-dim);
  letter-spacing: .06em;
}
#code:focus-visible { outline: none; }

.field button {
  display: flex;
  align-items: center;
  gap: .4rem;
  background: var(--ink);
  color: var(--paper);
  border: none;
  border-radius: 6px;
  padding: .75rem 1.1rem;
  font: inherit;
  font-weight: 600;
  font-size: .92rem;
  cursor: pointer;
  white-space: nowrap;
  transition: background .15s ease, opacity .15s ease;
}
.field button:hover { background: #2b3033; }
.field button:disabled { opacity: .55; cursor: default; }
.field button svg { width: 14px; height: 14px; flex: none; }

.hint {
  margin: .8rem 0 0;
  font-size: .85rem;
  color: var(--steel);
}
.hint.is-error { color: var(--rec); }

@media (max-width: 480px) {
  .field { flex-direction: column; padding: .6rem; gap: .5rem; }
  .field button { justify-content: center; }
}

/* ---------- steps ---------- */

.steps { padding: 2.6rem 0 4.4rem; border-top: 1px solid var(--line); }
.steps ol { list-style: none; margin: 0; padding: 0; display: grid; gap: 1.6rem; }
.steps li { display: grid; grid-template-columns: 2.6rem 1fr; gap: 1rem; }
.steps .n {
  font-family: ui-monospace, "SF Mono", "Cascadia Code", "Roboto Mono", Consolas, monospace;
  font-size: .85rem;
  color: var(--steel-dim);
  padding-top: .15rem;
}
.steps h3 { margin: 0 0 .25rem; font-size: 1rem; font-weight: 600; }
.steps p { margin: 0; color: var(--steel); font-size: .92rem; max-width: 30rem; }

/* ---------- footer ---------- */

footer.vault {
  background: var(--vault);
  color: var(--vault-ink);
  padding: 1.4rem 0;
}
footer.vault .wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: .6rem;
  font-size: .82rem;
}
footer.vault .status {
  display: flex;
  align-items: center;
  gap: .5rem;
  font-family: ui-monospace, "SF Mono", "Cascadia Code", "Roboto Mono", Consolas, monospace;
  color: #A9B0AC;
  font-size: .78rem;
}
footer.vault .ok {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: #5EA26B;
  display: inline-block;
}

@media (prefers-reduced-motion: reduce) {
  .hero { animation: none; opacity: 1; transform: none; }
  .rec .dot { animation: none; }
}