:root {
  --bg: #ffffff; --bg-soft: #f6f7f9; --fg: #0f1419; --muted: #5b6573; --line: #e4e7ec;
  --accent: #3b5bfd; --accent-fg: #ffffff; --accent-soft: #eef1ff; --code-bg: #0f1419; --code-fg: #e6edf3;
  --radius: 14px; --shadow: 0 1px 2px rgba(16,24,40,.05), 0 8px 24px rgba(16,24,40,.06);
  --font: ui-sans-serif, -apple-system, BlinkMacSystemFont, "Segoe UI", Inter, Roboto, sans-serif;
  --mono: ui-monospace, "SF Mono", Menlo, Consolas, monospace;
}
@media (prefers-color-scheme: dark) {
  :root { --bg: #0b0d12; --bg-soft: #12151c; --fg: #e8ebf0; --muted: #98a2b3; --line: #232834;
    --accent: #7c93ff; --accent-fg: #0b0d12; --accent-soft: #1a2040; --code-bg: #12151c; --shadow: none; }
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body { margin: 0; background: var(--bg); color: var(--fg); font: 16px/1.6 var(--font); }
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }
code { font-family: var(--mono); font-size: .9em; background: var(--bg-soft); padding: .1em .35em; border-radius: 6px; }
pre { background: var(--code-bg); color: var(--code-fg); padding: 16px 18px; border-radius: 12px; overflow-x: auto; font-size: 14px; line-height: 1.5; }
pre code { background: none; padding: 0; color: inherit; }
h1 { font-size: clamp(30px, 5vw, 48px); line-height: 1.1; letter-spacing: -.02em; margin: .2em 0 .3em; }
h2 { font-size: 24px; letter-spacing: -.01em; margin: 1.6em 0 .6em; }
h3 { font-size: 18px; margin: .3em 0; }
.wrap { max-width: 1120px; margin: 0 auto; padding: 0 16px; }
.narrow { max-width: 680px; }
.center { text-align: center; }
.muted { color: var(--muted); }
.small { font-size: 14px; }
.lead { font-size: 19px; color: var(--muted); max-width: 680px; }
.center .lead { margin-left: auto; margin-right: auto; }

.nav { position: sticky; top: 0; z-index: 10; background: color-mix(in srgb, var(--bg) 85%, transparent); backdrop-filter: blur(12px); border-bottom: 1px solid var(--line); }
.nav-inner { display: flex; align-items: center; justify-content: space-between; height: 60px; gap: 16px; }
.brand { display: flex; align-items: center; gap: 10px; font-weight: 700; color: var(--fg); }
.brand:hover { text-decoration: none; }
.logo { width: 22px; height: 22px; border-radius: 7px; background: linear-gradient(135deg, var(--accent), #9f7aea); }
.nav nav { display: flex; gap: 20px; font-size: 15px; }
.nav nav a { color: var(--muted); }
.nav nav a:hover { color: var(--fg); text-decoration: none; }

.hero { padding: 72px 0 40px; }
.eyebrow { font: 600 13px/1 var(--mono); letter-spacing: .08em; color: var(--accent); text-transform: uppercase; }
.hero-cta { display: flex; gap: 12px; margin-top: 24px; flex-wrap: wrap; }
.btn { display: inline-flex; align-items: center; justify-content: center; gap: 8px; height: 42px; padding: 0 18px; border-radius: 10px; border: 1px solid var(--line); background: var(--bg); color: var(--fg); font: 600 15px var(--font); cursor: pointer; }
.btn:hover { text-decoration: none; border-color: var(--muted); }
.btn.primary { background: var(--accent); color: var(--accent-fg); border-color: var(--accent); }
.btn.primary:hover { filter: brightness(1.08); }
.btn[disabled] { opacity: .5; cursor: not-allowed; }
.btn.block { width: 100%; }

.section-head { display: flex; align-items: center; justify-content: space-between; gap: 16px; flex-wrap: wrap; }
.search, input[type=email], input[type=text], input[type=password] { height: 42px; padding: 0 14px; border-radius: 10px; border: 1px solid var(--line); background: var(--bg); color: var(--fg); font: 15px var(--font); width: 100%; }
.search { max-width: 280px; }
.grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(260px, 1fr)); gap: 16px; margin-top: 8px; }
.card { display: flex; flex-direction: column; gap: 6px; padding: 20px; border: 1px solid var(--line); border-radius: var(--radius); background: var(--bg); color: var(--fg); box-shadow: var(--shadow); transition: transform .15s, border-color .15s; }
.card:hover { text-decoration: none; transform: translateY(-2px); border-color: var(--accent); }
.card p { margin: 0; color: var(--muted); font-size: 15px; flex: 1; }
.card-foot { font: 13px var(--mono); color: var(--muted); margin-top: 8px; }
.pill { align-self: flex-start; font-size: 12px; font-weight: 600; padding: 3px 10px; border-radius: 999px; background: var(--accent-soft); color: var(--accent); }

.how { padding-bottom: 40px; }
.steps { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 16px; }
.steps > div { padding: 20px; background: var(--bg-soft); border-radius: var(--radius); }
.steps p { margin: 6px 0 0; color: var(--muted); }

.api-head { padding-top: 32px; }
.back { display: inline-block; margin-bottom: 16px; font-size: 14px; }
.api-layout { display: grid; grid-template-columns: minmax(0, 1fr) 300px; gap: 40px; padding-bottom: 48px; }
.prose p, .prose li { max-width: 72ch; }
.endpoint { padding: 12px 0; border-bottom: 1px solid var(--line); }
.endpoint p { margin: 6px 0 0; color: var(--muted); }
.method { display: inline-block; min-width: 56px; margin-right: 8px; font: 700 12px var(--mono); padding: 3px 8px; border-radius: 6px; text-align: center; background: var(--accent-soft); color: var(--accent); }
.m-post { background: #e8f7ee; color: #127a3d; }
@media (prefers-color-scheme: dark) { .m-post { background: #10281b; color: #5fd08f; } }
.side-card { position: sticky; top: 84px; padding: 20px; border: 1px solid var(--line); border-radius: var(--radius); box-shadow: var(--shadow); }
.price { font-size: 32px; font-weight: 800; letter-spacing: -.02em; margin: 6px 0; }
.price span { font-size: 15px; font-weight: 500; color: var(--muted); }

.packs { display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); gap: 16px; margin: 32px 0 16px; }
.pack { display: flex; flex-direction: column; gap: 10px; padding: 24px; border: 1px solid var(--line); border-radius: var(--radius); box-shadow: var(--shadow); }
.pack p { margin: 0; }
.pack.featured { border-color: var(--accent); box-shadow: 0 0 0 1px var(--accent), var(--shadow); }
.notice { padding: 12px 16px; border-radius: 10px; background: var(--accent-soft); color: var(--fg); }
.keybox { display: flex; gap: 12px; align-items: center; justify-content: center; flex-wrap: wrap; margin: 24px 0; }
.keybox code { font-size: 15px; padding: 10px 14px; word-break: break-all; }
.inline-form { display: flex; gap: 12px; margin: 16px 0; }

.footer { border-top: 1px solid var(--line); margin-top: 48px; padding: 24px 0; font-size: 14px; color: var(--muted); }
.footer-inner { display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap; }
.footer-links { display: flex; gap: 18px; }
.footer a { color: var(--muted); }

@media (max-width: 800px) {
  .api-layout { grid-template-columns: 1fr; }
  .side-card { position: static; }
  .nav nav { gap: 14px; font-size: 14px; }
  .hero { padding-top: 48px; }
  .inline-form { flex-direction: column; }
}
main > section:first-child:not(.hero) { padding-top: 40px; }
.back { display: block; width: max-content; }