:root {
  color-scheme: light dark;
  --background: #0f1117;
  --surface: #181b24;
  --surface-strong: #222634;
  --text: #f4f6ff;
  --muted: #b9c0d4;
  --line: #343a4c;
  --primary: #a9c7ff;
  --primary-ink: #102a55;
  --focus: #ffd37a;
  --maximum: 72rem;
}

* {
  box-sizing: border-box;
}

html {
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont,
    "Segoe UI", sans-serif;
  background: var(--background);
  color: var(--text);
  line-height: 1.6;
}

body {
  margin: 0;
  min-height: 100vh;
  background:
    radial-gradient(circle at 80% 0%, rgb(62 94 148 / 24%), transparent 34rem),
    var(--background);
}

a {
  color: var(--primary);
  text-underline-offset: 0.2em;
}

a:hover {
  text-decoration-thickness: 0.14em;
}

a:focus-visible {
  border-radius: 0.25rem;
  outline: 0.2rem solid var(--focus);
  outline-offset: 0.2rem;
}

.site-header,
.site-footer,
main {
  width: min(calc(100% - 2rem), var(--maximum));
  margin-inline: auto;
}

.site-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding-block: 1.25rem;
  border-bottom: 1px solid var(--line);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.7rem;
  color: var(--text);
  font-weight: 760;
  text-decoration: none;
}

.brand-mark {
  display: grid;
  width: 2.25rem;
  height: 2.25rem;
  place-items: center;
  border: 1px solid rgb(169 199 255 / 55%);
  border-radius: 0.8rem;
  background: #25365b;
  color: var(--primary);
  font-size: 1.2rem;
}

nav {
  display: flex;
  flex-wrap: wrap;
  gap: 0.9rem;
}

nav a {
  color: var(--muted);
  font-size: 0.93rem;
  text-decoration: none;
}

main {
  padding-block: clamp(2.5rem, 7vw, 6rem);
}

.hero {
  max-width: 49rem;
}

.eyebrow {
  color: var(--primary);
  font-size: 0.8rem;
  font-weight: 750;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

h1,
h2,
h3 {
  line-height: 1.18;
}

h1 {
  max-width: 18ch;
  margin: 0.5rem 0 1rem;
  font-size: clamp(2.4rem, 7vw, 4.8rem);
  letter-spacing: -0.045em;
}

.document h1 {
  max-width: 24ch;
  font-size: clamp(2.2rem, 5vw, 3.8rem);
}

h2 {
  margin-top: 2.8rem;
  font-size: clamp(1.35rem, 3vw, 1.8rem);
}

h3 {
  margin-top: 1.8rem;
}

p,
li {
  max-width: 72ch;
}

.lead {
  color: var(--muted);
  font-size: clamp(1.08rem, 2vw, 1.3rem);
}

.actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.8rem;
  margin-top: 2rem;
}

.button {
  display: inline-flex;
  min-height: 2.8rem;
  align-items: center;
  justify-content: center;
  padding: 0.65rem 1rem;
  border: 1px solid var(--line);
  border-radius: 0.85rem;
  color: var(--text);
  font-weight: 700;
  text-decoration: none;
}

.button-primary {
  border-color: var(--primary);
  background: var(--primary);
  color: var(--primary-ink);
}

.cards {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1rem;
  margin-top: 4rem;
}

.card,
.notice {
  border: 1px solid var(--line);
  border-radius: 1.1rem;
  background: rgb(24 27 36 / 88%);
}

.card {
  padding: 1.3rem;
}

.card h2 {
  margin-top: 0;
  font-size: 1.2rem;
}

.card p {
  color: var(--muted);
}

.notice {
  padding: 1rem 1.1rem;
}

.document {
  max-width: 52rem;
}

.document .updated {
  color: var(--muted);
}

.document li + li {
  margin-top: 0.45rem;
}

.demo-page {
  padding-top: clamp(2rem, 5vw, 4rem);
}

.demo-intro {
  max-width: 50rem;
}

.demo-intro h1 {
  max-width: 16ch;
  font-size: clamp(2.35rem, 6vw, 4.4rem);
}

.demo-layout {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1.25rem;
  margin-top: 2.5rem;
}

.demo-panel {
  padding: clamp(1.25rem, 3vw, 2rem);
  border: 1px solid var(--line);
  border-radius: 1.25rem;
  background: rgb(24 27 36 / 92%);
}

.demo-panel h2 {
  margin: 0.3rem 0 1rem;
}

.step-label {
  color: var(--primary);
  font-size: 0.78rem;
  font-weight: 750;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.qr-frame {
  width: min(100%, 22rem);
  margin: 1.5rem auto;
  padding: 0.8rem;
  border-radius: 1.2rem;
  background: #fff;
}

.qr-frame img {
  display: block;
  width: 100%;
  height: auto;
}

.account-details {
  margin: 1.5rem 0;
  border-top: 1px solid var(--line);
}

.account-details div {
  display: grid;
  grid-template-columns: 6rem 1fr;
  gap: 1rem;
  padding-block: 0.65rem;
  border-bottom: 1px solid var(--line);
}

.account-details dt {
  color: var(--muted);
}

.account-details dd {
  margin: 0;
  overflow-wrap: anywhere;
}

details {
  margin-top: 1.5rem;
}

summary {
  cursor: pointer;
  color: var(--primary);
  font-weight: 700;
}

.setup-key-row {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.setup-key-row code {
  flex: 1;
  overflow-wrap: anywhere;
}

.small-button {
  min-height: 2.5rem;
  padding: 0.45rem 0.8rem;
  border: 1px solid var(--line);
  border-radius: 0.65rem;
  background: var(--surface-strong);
  color: var(--text);
  cursor: pointer;
  font: inherit;
  font-weight: 700;
}

#verify-form label {
  display: block;
  margin-top: 1.5rem;
  font-weight: 700;
}

#otp-code {
  width: 100%;
  margin-top: 0.55rem;
  padding: 0.8rem 1rem;
  border: 1px solid var(--line);
  border-radius: 0.8rem;
  background: var(--background);
  color: var(--text);
  font: 700 1.65rem/1.2 ui-monospace, "SFMono-Regular", Consolas, monospace;
  letter-spacing: 0.25em;
}

#otp-code:focus-visible,
.small-button:focus-visible {
  outline: 0.2rem solid var(--focus);
  outline-offset: 0.2rem;
}

.field-help {
  margin: 0.55rem 0 0;
  color: var(--muted);
  font-size: 0.9rem;
}

.verify-button {
  width: 100%;
  margin-top: 1.25rem;
  cursor: pointer;
  font: inherit;
}

.verification-result {
  min-height: 3.5rem;
  margin-top: 1rem;
  padding: 0.85rem 1rem;
  border-radius: 0.8rem;
}

.verification-result:empty {
  padding: 0;
}

.verification-result[data-state="success"] {
  border: 1px solid #4da979;
  background: rgb(29 101 65 / 25%);
  color: #a7edc5;
}

.verification-result[data-state="error"] {
  border: 1px solid #d36a70;
  background: rgb(128 34 42 / 25%);
  color: #ffb8bc;
}

.period-status {
  margin-top: 1.2rem;
}

.period-status-row {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  color: var(--muted);
  font-size: 0.9rem;
}

.period-status-row strong {
  color: var(--text);
}

progress {
  width: 100%;
  height: 0.55rem;
  margin-top: 0.5rem;
  accent-color: var(--primary);
}

.demo-warning {
  display: grid;
  gap: 0.2rem;
  margin-top: 1.5rem;
  padding: 1rem;
  border: 1px solid #7d673c;
  border-radius: 0.85rem;
  background: rgb(109 77 20 / 18%);
  color: #f4d798;
}

.steps {
  padding-left: 1.35rem;
}

.site-footer {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  padding-block: 1.5rem 2rem;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 0.9rem;
}

.site-footer p {
  margin: 0;
}

@media (max-width: 48rem) {
  .site-header,
  .site-footer {
    align-items: flex-start;
    flex-direction: column;
  }

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

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

@media (prefers-reduced-motion: no-preference) {
  .button {
    transition: transform 140ms ease, background-color 140ms ease;
  }

  .button:hover {
    transform: translateY(-0.1rem);
  }
}