:root {
  color-scheme: dark;
  --background: oklch(0.135 0.012 260);
  --foreground: oklch(0.97 0.01 90);
  --card: oklch(0.19 0.014 260);
  --card-foreground: oklch(0.97 0.01 90);
  --primary: oklch(0.73 0.18 57);
  --primary-foreground: oklch(0.15 0.018 260);
  --muted: oklch(0.235 0.015 260);
  --muted-foreground: oklch(0.72 0.012 90);
  --border: oklch(0.33 0.018 260);
  --input: oklch(0.29 0.016 260);
  --ring: oklch(0.73 0.18 57);
  --radius: 0.7rem;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  min-width: 320px;
  background: var(--background);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont,
    "Segoe UI", sans-serif;
  line-height: 1.5;
  text-rendering: optimizeLegibility;
  -webkit-text-size-adjust: 100%;
}

body {
  min-height: 100vh;
  margin: 0;
  background: var(--background);
  color: var(--foreground);
}

button,
input {
  font: inherit;
}

.site-shell {
  isolation: isolate;
  position: relative;
  display: flex;
  min-height: 100vh;
  flex-direction: column;
  overflow: hidden;
  padding: 0 clamp(1.25rem, 4vw, 4rem);
  background:
    radial-gradient(circle at 78% 38%, oklch(0.68 0.17 57 / 12%), transparent 29rem),
    linear-gradient(145deg, oklch(0.16 0.018 260), var(--background) 55%);
}

.ambient-grid {
  pointer-events: none;
  position: absolute;
  z-index: -1;
  inset: 0;
  opacity: 0.22;
  background-image:
    linear-gradient(oklch(0.5 0.015 260 / 16%) 1px, transparent 1px),
    linear-gradient(90deg, oklch(0.5 0.015 260 / 16%) 1px, transparent 1px);
  background-size: 3.5rem 3.5rem;
  -webkit-mask-image: linear-gradient(to bottom, black, transparent 82%);
  mask-image: linear-gradient(to bottom, black, transparent 82%);
}

.site-header,
.site-footer,
.payment-layout {
  width: min(100%, 72rem);
  margin-inline: auto;
}

.site-header {
  display: flex;
  min-height: 5.5rem;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  border-bottom: 1px solid oklch(0.38 0.016 260 / 55%);
}

.wordmark {
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
  color: inherit;
  font-weight: 680;
  letter-spacing: -0.025em;
  text-decoration: none;
}

.coin-mark {
  display: grid;
  width: 2rem;
  height: 2rem;
  place-items: center;
  border-radius: 50%;
  background: var(--primary);
  color: var(--primary-foreground);
  font-family: ui-monospace, "SFMono-Regular", Consolas, monospace;
  font-size: 1.15rem;
  font-weight: 800;
}

.network-chip {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 0.45rem 0.72rem;
  background: oklch(0.18 0.012 260 / 85%);
  color: var(--muted-foreground);
  font-family: ui-monospace, "SFMono-Regular", Consolas, monospace;
  font-size: 0.75rem;
  letter-spacing: 0.025em;
  white-space: nowrap;
}

.network-dot {
  width: 0.45rem;
  height: 0.45rem;
  border-radius: 50%;
  background: var(--primary);
  box-shadow: 0 0 0.7rem oklch(0.73 0.18 57 / 70%);
}

.payment-layout {
  display: grid;
  flex: 1;
  grid-template-columns: minmax(0, 0.92fr) minmax(22rem, 0.72fr);
  align-items: center;
  gap: clamp(3rem, 8vw, 8rem);
  padding-block: clamp(3.5rem, 9vh, 7rem);
}

.intro-panel {
  max-width: 35rem;
}

.eyebrow,
.step-label {
  margin: 0;
  color: var(--primary);
  font-family: ui-monospace, "SFMono-Regular", Consolas, monospace;
  font-size: 0.76rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

h1 {
  max-width: 11ch;
  margin: 1.1rem 0 1.25rem;
  font-size: clamp(2.7rem, 7vw, 5.5rem);
  font-weight: 670;
  letter-spacing: -0.065em;
  line-height: 0.94;
}

.intro-copy {
  max-width: 32rem;
  margin: 0;
  color: var(--muted-foreground);
  font-size: clamp(1rem, 1.8vw, 1.15rem);
  line-height: 1.7;
}

.trust-list {
  display: grid;
  gap: 0;
  margin: 2.5rem 0 0;
  border-top: 1px solid var(--border);
}

.trust-list div {
  display: grid;
  grid-template-columns: 6rem 1fr;
  gap: 1rem;
  padding: 0.85rem 0;
  border-bottom: 1px solid var(--border);
}

.trust-list dt {
  color: var(--muted-foreground);
  font-family: ui-monospace, "SFMono-Regular", Consolas, monospace;
  font-size: 0.76rem;
  text-transform: uppercase;
}

.trust-list dd {
  margin: 0;
  font-size: 0.92rem;
}

.form-panel {
  position: relative;
  border: 1px solid oklch(0.42 0.018 260 / 75%);
  border-radius: 1.25rem;
  padding: clamp(1.3rem, 4vw, 2rem);
  background: oklch(0.18 0.016 260 / 94%);
  box-shadow: 0 2rem 5rem oklch(0.06 0.02 260 / 45%);
}

.form-panel::before {
  content: "";
  position: absolute;
  inset: 0.45rem;
  z-index: -1;
  transform: translate(0.65rem, 0.65rem);
  border: 1px solid oklch(0.7 0.15 57 / 22%);
  border-radius: inherit;
}

.form-heading {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding-bottom: 1.4rem;
  border-bottom: 1px solid var(--border);
}

.form-heading h2 {
  margin: 0.4rem 0 0;
  font-size: 1.55rem;
  font-weight: 650;
  letter-spacing: -0.03em;
}

.btc-badge {
  border: 1px solid oklch(0.73 0.18 57 / 48%);
  border-radius: 0.45rem;
  padding: 0.42rem 0.5rem;
  background: oklch(0.73 0.18 57 / 10%);
  color: var(--primary);
  font-family: ui-monospace, "SFMono-Regular", Consolas, monospace;
  font-size: 0.8rem;
  font-weight: 800;
  letter-spacing: 0.08em;
}

.checkout-steps {
  display: grid;
  gap: 0;
  margin: 0;
  padding: 0;
  list-style: none;
}

.checkout-steps li {
  display: grid;
  grid-template-columns: 2.25rem 1fr;
  gap: 0.9rem;
  padding: 1.15rem 0;
  border-bottom: 1px solid var(--border);
}

.checkout-steps li > span {
  color: var(--primary);
  font-family: ui-monospace, "SFMono-Regular", Consolas, monospace;
  font-size: 0.74rem;
  font-weight: 800;
  letter-spacing: 0.08em;
}

.checkout-steps strong {
  display: block;
  font-size: 0.94rem;
  font-weight: 650;
}

.checkout-steps p {
  margin: 0.35rem 0 0;
  color: var(--muted-foreground);
  font-size: 0.78rem;
  line-height: 1.5;
}

.checkout-action {
  padding-top: 1.5rem;
}

.submit-button {
  display: flex;
  height: 3.35rem;
  width: 100%;
  align-items: center;
  justify-content: space-between;
  border-radius: 0.65rem;
  padding-inline: 1.05rem;
  background: var(--primary);
  color: var(--primary-foreground);
  font-size: 0.95rem;
  font-weight: 750;
  text-decoration: none;
  transition: background-color 160ms ease, transform 160ms ease;
}

.submit-button:hover {
  background: oklch(0.79 0.17 67);
  transform: translateY(-1px);
}

.submit-button:focus-visible {
  outline: 3px solid oklch(0.73 0.18 57 / 35%);
  outline-offset: 3px;
}

.submit-button span {
  font-size: 1.25rem;
}

.checkout-action p {
  margin: 0.75rem 0 0;
  color: var(--muted-foreground);
  font-family: ui-monospace, "SFMono-Regular", Consolas, monospace;
  font-size: 0.75rem;
  text-align: center;
}

.site-footer {
  display: flex;
  min-height: 4.25rem;
  align-items: center;
  justify-content: center;
  gap: 0.6rem;
  border-top: 1px solid oklch(0.38 0.016 260 / 55%);
  color: var(--muted-foreground);
  font-family: ui-monospace, "SFMono-Regular", Consolas, monospace;
  font-size: 0.75rem;
  letter-spacing: 0.025em;
  text-align: center;
}

@media (max-width: 800px) {
  .payment-layout {
    grid-template-columns: 1fr;
    gap: 2.5rem;
    padding-block: 3rem;
  }

  h1 {
    max-width: 12ch;
  }

  .intro-panel {
    display: contents;
  }

  .intro-message {
    order: 1;
    max-width: 40rem;
  }

  .form-panel {
    order: 2;
  }

  .trust-list {
    order: 3;
    margin-top: 0;
  }
}

@media (max-width: 520px) {
  .site-shell {
    padding-inline: 1rem;
  }

  .site-header {
    min-height: 4.75rem;
  }

  .network-chip {
    padding-inline: 0.55rem;
    font-size: 0.75rem;
  }

  .wordmark > span:last-child {
    font-size: 0.9rem;
  }

  .payment-layout {
    padding-block: 2.5rem 3rem;
  }

  h1 {
    font-size: clamp(2.65rem, 15vw, 4rem);
  }

  .trust-list div {
    grid-template-columns: 5.2rem 1fr;
  }

  .form-panel {
    border-radius: 1rem;
    padding: 1.15rem;
  }

  .site-footer {
    flex-wrap: wrap;
    padding-block: 1rem;
  }
}