:root {
  --bg: #FAFAF8;
  --ink: #0B0B0B;
  --muted: #666;
  --accent: #1F4DDF;
  --rule: #E6E5E0;
  --code-bg: #F2F1EC;
  --max: 720px;
  --mono: ui-monospace, SFMono-Regular, Menlo, Consolas, "Liberation Mono", monospace;
  --sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0B0B0B;
    --ink: #FAFAF8;
    --muted: #9A9A92;
    --accent: #7A93F0;
    --rule: #1F1F1D;
    --code-bg: #141413;
  }
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
}

a {
  color: var(--accent);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: border-color 120ms ease;
}
a:hover { border-bottom-color: var(--accent); }

main {
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 24px;
}

/* hero */
.hero {
  padding: 96px 0 64px;
}
.wordmark {
  display: inline-block;
  color: var(--ink);
  font-family: var(--mono);
  font-size: 20px;
  font-weight: 600;
  letter-spacing: -0.5px;
  margin-bottom: 64px;
  border: none;
}
.wordmark svg { display: block; height: 28px; width: auto; }

h1 {
  font-size: 40px;
  line-height: 1.15;
  font-weight: 600;
  letter-spacing: -0.8px;
  margin: 0 0 20px;
  color: var(--ink);
}

.lede {
  font-size: 18px;
  line-height: 1.6;
  color: var(--muted);
  margin: 0 0 36px;
  max-width: 600px;
}

.lede-crypto {
  font-family: var(--mono);
  font-size: 14px;
  color: var(--accent);
  margin: -24px 0 36px;
  letter-spacing: 0.2px;
}

.cta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.btn {
  display: inline-block;
  font-family: var(--sans);
  font-size: 15px;
  font-weight: 500;
  padding: 10px 18px;
  border-radius: 6px;
  border: 1px solid var(--ink);
  background: var(--ink);
  color: var(--bg);
  cursor: pointer;
  transition: opacity 120ms ease;
}
.btn:hover { opacity: 0.85; border-bottom-color: var(--ink); }

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

/* sections */
section {
  padding: 64px 0;
  border-top: 1px solid var(--rule);
}
section h2 {
  font-size: 28px;
  font-weight: 600;
  letter-spacing: -0.4px;
  margin: 0 0 24px;
  line-height: 1.25;
}
section p {
  margin: 0 0 16px;
  max-width: 640px;
}

.kicker {
  display: block;
  font-family: var(--mono);
  font-size: 13px;
  color: var(--muted);
  letter-spacing: 0.5px;
  text-transform: lowercase;
  margin-bottom: 8px;
}

/* earnings calculator */
.calc {
  margin-top: 32px;
  padding: 24px;
  border: 1px solid var(--rule);
  border-radius: 8px;
  background: var(--code-bg);
  font-family: var(--mono);
  font-size: 14px;
}
.calc dl {
  margin: 0;
  display: grid;
  grid-template-columns: 1fr auto;
  row-gap: 8px;
  column-gap: 24px;
}
.calc dt { color: var(--muted); }
.calc dd { margin: 0; color: var(--ink); text-align: right; }
.calc dt.total-row,
.calc dd.total-row {
  border-top: 1px solid var(--rule);
  padding-top: 12px;
  margin-top: 8px;
  font-weight: 600;
  color: var(--ink);
}
.calc-note {
  margin-top: 12px;
  font-family: var(--sans);
  font-size: 13px;
  color: var(--muted);
}

/* code block */
pre {
  margin: 24px 0;
  padding: 20px;
  background: var(--code-bg);
  border: 1px solid var(--rule);
  border-radius: 8px;
  overflow-x: auto;
  font-family: var(--mono);
  font-size: 13px;
  line-height: 1.55;
  color: var(--ink);
}
code { font-family: var(--mono); }
p code, li code {
  background: var(--code-bg);
  padding: 1px 6px;
  border-radius: 4px;
  font-size: 0.92em;
}

/* trust list */
.trust-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 20px;
}
.trust-list li {
  padding-left: 18px;
  position: relative;
  color: var(--ink);
}
.trust-list li::before {
  content: "›";
  position: absolute;
  left: 0;
  color: var(--accent);
  font-family: var(--mono);
}
.trust-list strong { font-weight: 600; }
.trust-list span { color: var(--muted); }

/* built by */
.builtby p { color: var(--muted); }
.builtby strong { color: var(--ink); font-weight: 600; }

/* contact line */
.contact {
  margin-top: 24px;
  font-family: var(--mono);
  font-size: 14px;
}

/* footer */
footer {
  border-top: 1px solid var(--rule);
  font-size: 13px;
  color: var(--muted);
  font-family: var(--mono);
}
.footer-inner {
  max-width: var(--max);
  margin: 0 auto;
  padding: 48px 24px 64px;
}
footer p { margin: 0 0 6px; }

/* responsive */
@media (max-width: 600px) {
  .hero { padding: 64px 0 48px; }
  h1 { font-size: 30px; letter-spacing: -0.5px; }
  .lede { font-size: 16px; }
  section { padding: 48px 0; }
  section h2 { font-size: 24px; }
  .calc { padding: 18px; font-size: 13px; }
  pre { padding: 16px; font-size: 12px; }
}

@media (min-width: 1600px) {
  html { font-size: 17px; }
}

/* selection */
::selection { background: var(--accent); color: var(--bg); }