:root {
  --bg: #0f0f0d;
  --bg-2: #171613;
  --ink: #efece4;
  --muted: #9a958a;
  --rule: #2b2924;
  --rule-2: #3d3a32;
  --accent: #d4b37a;
  --ok: #8fbc8f;
  --danger: #c47a6a;
  --mono: "IBM Plex Mono", ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  --sans: "IBM Plex Sans", ui-sans-serif, system-ui, -apple-system, sans-serif;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; }

body {
  background: var(--bg);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 17px;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}

a { color: var(--ink); }

.wrap {
  width: min(760px, calc(100% - 40px));
  margin: 0 auto;
}

header {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  padding: 28px 0 0;
}

.mark {
  font-family: var(--mono);
  font-size: 13px;
  letter-spacing: 0.22em;
  font-weight: 500;
}

.nav a {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--muted);
  text-decoration: none;
  border-bottom: 1px solid transparent;
}

.nav a:hover { color: var(--ink); border-bottom-color: var(--rule-2); }

.hero { padding: 88px 0 72px; }

.kicker {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 22px;
}

h1 {
  font-size: clamp(36px, 7vw, 58px);
  line-height: 1.05;
  font-weight: 500;
  letter-spacing: -0.03em;
  max-width: 14ch;
}

.sub {
  margin-top: 22px;
  max-width: 46ch;
  color: var(--muted);
  font-size: 19px;
  line-height: 1.45;
}

.price-row {
  margin-top: 36px;
  display: flex;
  flex-wrap: wrap;
  gap: 16px 28px;
  align-items: baseline;
}

.price {
  font-family: var(--mono);
  font-size: 28px;
  letter-spacing: -0.02em;
}

.price span {
  color: var(--muted);
  font-size: 13px;
  letter-spacing: 0.04em;
  margin-left: 8px;
}

.btn {
  display: inline-block;
  background: var(--ink);
  color: var(--bg);
  text-decoration: none;
  font-family: var(--mono);
  font-size: 13px;
  letter-spacing: 0.06em;
  padding: 12px 16px;
  border: 1px solid var(--ink);
}

.btn:hover { background: var(--accent); border-color: var(--accent); color: #1a160e; }

.btn-ghost {
  background: transparent;
  color: var(--ink);
}

.btn-ghost:hover { background: var(--bg-2); color: var(--ink); }

hr.rule {
  border: 0;
  border-top: 1px solid var(--rule);
  margin: 0;
}

section { padding: 64px 0; }

h2 {
  font-size: 13px;
  font-family: var(--mono);
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 28px;
  font-weight: 500;
}

.include {
  display: grid;
  gap: 0;
}

.item {
  padding: 22px 0;
  border-top: 1px solid var(--rule);
  display: grid;
  grid-template-columns: 48px 1fr;
  gap: 8px 16px;
}

.item:last-child { border-bottom: 1px solid var(--rule); }

.num {
  font-family: var(--mono);
  font-size: 12px;
  color: var(--accent);
  padding-top: 4px;
}

.item h3 {
  font-size: 20px;
  font-weight: 500;
  letter-spacing: -0.02em;
}

.item p { color: var(--muted); margin-top: 6px; }

.split {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
}

.split h3 {
  font-size: 18px;
  font-weight: 500;
  margin-bottom: 14px;
}

.split ul { list-style: none; }
.split li {
  padding: 8px 0 8px 16px;
  position: relative;
  color: var(--muted);
  border-top: 1px solid var(--rule);
}

.split li:first-child { border-top: 0; }

.split .yes li::before {
  content: "";
  position: absolute;
  left: 0; top: 16px;
  width: 6px; height: 6px;
  background: var(--ok);
}

.split .no li::before {
  content: "";
  position: absolute;
  left: 0; top: 16px;
  width: 6px; height: 6px;
  background: var(--danger);
}

.steps { display: grid; gap: 0; }

.step {
  display: grid;
  grid-template-columns: 36px 1fr;
  gap: 16px;
  padding: 18px 0;
  border-top: 1px solid var(--rule);
}

.step:last-child { border-bottom: 1px solid var(--rule); }

.step b {
  font-family: var(--mono);
  font-size: 12px;
  color: var(--accent);
  padding-top: 3px;
  font-weight: 500;
}

.pay-box {
  background: var(--bg-2);
  border: 1px solid var(--rule);
  padding: 28px;
}

.pay-box p.lead {
  color: var(--muted);
  margin-bottom: 22px;
}

.addr {
  margin: 18px 0 0;
}

.addr label {
  display: block;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 8px;
}

.addr-row {
  display: flex;
  gap: 8px;
  align-items: stretch;
}

.addr code {
  flex: 1;
  font-family: var(--mono);
  font-size: 12px;
  background: var(--bg);
  border: 1px solid var(--rule);
  padding: 12px 12px;
  word-break: break-all;
  color: var(--ink);
}

.copy {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  background: transparent;
  color: var(--ink);
  border: 1px solid var(--rule-2);
  padding: 0 12px;
  cursor: pointer;
}

.copy:hover { border-color: var(--accent); color: var(--accent); }

.note {
  margin-top: 22px;
  font-size: 15px;
  color: var(--muted);
}

.note a { color: var(--accent); }

form {
  margin-top: 28px;
  display: grid;
  gap: 12px;
}

label.field {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--muted);
}

input, textarea {
  width: 100%;
  background: var(--bg);
  border: 1px solid var(--rule-2);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 15px;
  padding: 12px;
}

input:focus, textarea:focus {
  outline: none;
  border-color: var(--accent);
}

button.submit {
  justify-self: start;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  background: var(--ink);
  color: var(--bg);
  border: 0;
  padding: 12px 16px;
  cursor: pointer;
}

button.submit:hover { background: var(--accent); }

.receipt {
  display: none;
  margin-top: 16px;
  border: 1px solid var(--rule-2);
  padding: 14px 16px;
  font-family: var(--mono);
  font-size: 12px;
  color: var(--ok);
  line-height: 1.5;
}

.receipt.show { display: block; }

footer {
  padding: 40px 0 56px;
  color: var(--muted);
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.06em;
  line-height: 1.7;
}

@media (max-width: 640px) {
  .split { grid-template-columns: 1fr; gap: 36px; }
  .hero { padding: 64px 0 56px; }
  section { padding: 48px 0; }
  .pay-box { padding: 20px; }
}