:root {
  color-scheme: dark;
  scroll-behavior: smooth;
  --bg: #050706;
  --surface: #131715;
  --surface-2: #191e1b;
  --text: #edffeb;
  --muted: #9aae97;
  --border: #354039;
  --green: #89f36e;
  --blue: #79ccff;
  --purple: #ad8cff;
  --max: 1120px;
  font-family: Inter, ui-sans-serif, system-ui, sans-serif;
}

* { box-sizing: border-box; }
html { background: var(--bg); }
body { margin: 0; background: radial-gradient(circle at 80% 5%, rgba(121, 204, 255, .08), transparent 28rem), var(--bg); color: var(--text); font-size: 16px; line-height: 1.6; }
a { color: inherit; text-decoration: none; }
button, input, select { font: inherit; }
.shell { width: min(calc(100% - 40px), var(--max)); margin-inline: auto; }
.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; overflow: hidden; clip: rect(0, 0, 0, 0); white-space: nowrap; border: 0; }
.skip-link { position: fixed; z-index: 100; top: 10px; left: 10px; padding: 8px 12px; transform: translateY(-150%); border-radius: 8px; background: var(--green); color: #071007; }
.skip-link:focus { transform: translateY(0); }

.site-header { position: sticky; z-index: 20; top: 0; border-bottom: 1px solid rgba(53, 64, 57, .75); background: rgba(5, 7, 6, .9); backdrop-filter: blur(16px); }
.nav { display: flex; min-height: 70px; align-items: center; gap: 24px; }
.brand { display: inline-flex; align-items: center; gap: 10px; font-family: "Space Grotesk", sans-serif; font-weight: 700; }
.nav-links { display: flex; align-items: center; gap: 22px; margin-left: auto; }
.nav-links a, .github-link { display: inline-flex; align-items: center; gap: 7px; color: var(--muted); font-size: 13px; font-weight: 650; }
.nav-links a:hover, .github-link:hover { color: var(--text); }
.language-control { display: inline-flex; align-items: center; gap: 8px; color: var(--blue); }
.language-control select { min-height: 38px; padding: 0 10px; border: 1px solid var(--border); border-radius: 9px; background: var(--surface); color: var(--text); cursor: pointer; font-size: 12px; font-weight: 700; }

.hero { display: grid; min-height: calc(100vh - 70px); align-items: center; grid-template-columns: minmax(0, .9fr) minmax(430px, 1.1fr); gap: 70px; padding-block: 72px; }
.eyebrow { display: flex; align-items: center; gap: 8px; margin: 0 0 13px; color: var(--green); font-size: 11px; font-weight: 800; letter-spacing: .13em; }
.eyebrow-purple { color: var(--purple); }
h1, h2, h3 { margin-top: 0; font-family: "Space Grotesk", sans-serif; line-height: 1.12; }
h1 { margin-bottom: 20px; font-size: clamp(46px, 6vw, 76px); letter-spacing: -.05em; }
h2 { margin-bottom: 12px; font-size: clamp(30px, 4vw, 44px); letter-spacing: -.04em; }
h3 { letter-spacing: -.02em; }
.hero-lead { max-width: 610px; margin: 0; color: var(--muted); font-size: 19px; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 11px; margin-top: 28px; }
.button { display: inline-flex; min-height: 44px; align-items: center; justify-content: center; gap: 8px; padding: 0 16px; border: 1px solid var(--border); border-radius: 10px; font-size: 13px; font-weight: 750; transition: transform 140ms ease, border-color 140ms ease; }
.button:hover { transform: translateY(-2px); }
.button-primary { border-color: var(--green); background: var(--green); color: #071007; }
.button-secondary { background: var(--surface); }
.button-secondary:hover { border-color: var(--blue); }
.hero-notes { display: flex; flex-wrap: wrap; gap: 18px; margin: 22px 0 0; padding: 0; list-style: none; color: var(--muted); font-size: 12px; }
.hero-notes li { display: inline-flex; align-items: center; gap: 7px; }
.hero-notes i { color: var(--green); }

.demo-card { padding: 22px; border: 1px solid var(--border); border-radius: 12px; background: var(--surface); box-shadow: 0 26px 70px rgba(0, 0, 0, .28); }
.card-heading { display: flex; align-items: flex-start; justify-content: space-between; gap: 20px; }
.card-heading h2 { margin-bottom: 0; font-size: 27px; }
.card-help { margin: 8px 0 15px; color: var(--muted); font-size: 13px; }
.live-pill { display: inline-flex; height: 27px; align-items: center; gap: 7px; padding: 0 10px; border: 1px solid var(--border); border-radius: 999px; color: var(--muted); font-size: 11px; }
.live-pill > span:first-child { width: 7px; height: 7px; border-radius: 50%; background: var(--green); }
.nexa-captcha { min-height: 346px; }
.nexacaptcha-frame { display: block; width: 100%; border: 0; }
.demo-output { display: flex; min-height: 40px; align-items: center; gap: 8px; margin-top: 12px; padding: 9px 12px; border: 1px solid #2c342f; border-radius: 8px; background: #0a0d0b; color: var(--muted); font: 11px "JetBrains Mono", monospace; overflow-wrap: anywhere; }
.demo-output.is-success { border-color: rgba(137, 243, 110, .55); color: var(--green); }

.section { padding-block: 96px; }
.section-heading { max-width: 700px; margin-bottom: 34px; }
.section-heading > p:last-child { margin: 0; color: var(--muted); font-size: 17px; }
.feature-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.feature-card { padding: 27px; border-top: 2px solid var(--blue); border-radius: 7px; background: var(--surface); }
.feature-card:nth-child(3n + 2) { border-color: var(--purple); }
.feature-card:nth-child(3n) { border-color: var(--green); }
.feature-card > i { margin-bottom: 35px; color: var(--blue); font-size: 20px; }
.feature-card:nth-child(3n + 2) > i { color: var(--purple); }
.feature-card:nth-child(3n) > i { color: var(--green); }
.feature-card h3 { margin-bottom: 9px; font-size: 21px; }
.feature-card p { margin: 0; color: var(--muted); }

.docs-section { border-block: 1px solid rgba(53, 64, 57, .55); background: rgba(19, 23, 21, .46); }
.setup-row { display: grid; grid-template-columns: minmax(260px, .7fr) minmax(0, 1.3fr); gap: 38px; align-items: start; padding-block: 27px; }
.setup-row + .setup-row { border-top: 1px solid var(--border); }
.setup-copy { display: flex; gap: 16px; }
.step-number { display: grid; flex: 0 0 30px; width: 30px; height: 30px; place-items: center; border: 1px solid var(--border); border-radius: 50%; color: var(--green); font: 11px monospace; }
.setup-copy h3 { display: flex; align-items: center; gap: 8px; margin: 3px 0 7px; font-size: 20px; }
.setup-copy h3 i { color: var(--green); font-size: 14px; }
.setup-copy p { margin: 0; color: var(--muted); }
.code-window, .backend-card { min-width: 0; overflow: hidden; border: 1px solid var(--border); border-radius: 9px; background: #090c0a; }
.code-toolbar { display: flex; min-height: 44px; align-items: center; justify-content: space-between; padding: 0 10px 0 15px; border-bottom: 1px solid #2c342f; background: var(--surface-2); color: var(--muted); font-size: 12px; font-weight: 700; }
.code-toolbar > span { display: inline-flex; align-items: center; gap: 7px; }
.copy-button { display: inline-flex; min-height: 31px; align-items: center; gap: 7px; padding: 0 9px; border: 1px solid transparent; border-radius: 7px; background: transparent; color: var(--muted); cursor: pointer; font-size: 12px; font-weight: 700; }
.copy-button:hover { border-color: var(--border); color: var(--text); }
.copy-button.is-copied { color: var(--green); }
pre { margin: 0; padding: 19px; overflow-x: auto; color: #d5ecd1; font: 13px/1.7 "JetBrains Mono", Consolas, monospace; }
.parameter-card { max-width: 720px; margin: 26px 0 0 auto; padding: 22px; border: 1px solid rgba(121, 204, 255, .4); border-radius: 9px; background: rgba(121, 204, 255, .05); }
.parameter-card h3 { display: flex; align-items: center; gap: 8px; margin-bottom: 10px; font-size: 18px; }
.parameter-card h3 i { color: var(--blue); }
dl { margin: 0; }
dl div { display: grid; grid-template-columns: 150px 1fr; gap: 18px; padding: 12px 0; border-top: 1px solid var(--border); }
dt { color: var(--text); font: 12px "JetBrains Mono", monospace; }
dd { margin: 0; color: var(--muted); font-size: 13px; }

.verify-layout { display: grid; grid-template-columns: minmax(330px, .8fr) minmax(0, 1.2fr); gap: 20px; align-items: start; }
.endpoint-card { overflow: hidden; border: 1px solid rgba(173, 140, 255, .48); border-radius: 9px; background: var(--surface); }
.endpoint-card > header { display: flex; align-items: center; gap: 10px; padding: 15px 18px; border-bottom: 1px solid var(--border); }
.endpoint-card > header code { font: 700 13px "JetBrains Mono", monospace; }
.method { padding: 5px 8px; border-radius: 5px; background: rgba(173, 140, 255, .14); color: var(--purple); font: 800 10px monospace; }
.endpoint-part { padding: 17px; }
.endpoint-part + .endpoint-part { border-top: 1px solid var(--border); }
.endpoint-part h3 { display: flex; align-items: center; gap: 7px; margin-bottom: 8px; color: var(--muted); font-size: 13px; }
.endpoint-part h3 i { color: var(--purple); }
.endpoint-part pre { padding: 14px; border-radius: 7px; background: #090c0a; }
.important-note { display: flex; align-items: flex-start; gap: 13px; margin-top: 18px; padding: 18px; border-left: 3px solid var(--green); background: rgba(137, 243, 110, .05); }
.important-note i { margin-top: 4px; color: var(--green); }
.important-note p { margin: 0; color: var(--muted); }

.site-footer { border-top: 1px solid var(--border); background: #080a08; }
.footer-grid { display: flex; min-height: 130px; align-items: center; justify-content: space-between; gap: 30px; }
.footer-brand { display: flex; align-items: center; gap: 11px; }
.footer-brand div { display: grid; }
.footer-brand span { color: var(--muted); font-size: 12px; }
.button:focus-visible, a:focus-visible, button:focus-visible, select:focus-visible { outline: 2px solid var(--green); outline-offset: 3px; }
.reveal { opacity: 0; transform: translateY(12px); transition: opacity 500ms ease, transform 500ms ease; }
.reveal.is-visible { opacity: 1; transform: none; }

@media (max-width: 900px) {
  .nav-links { display: none; }
  .language-control { margin-left: auto; }
  .hero { min-height: auto; grid-template-columns: 1fr; padding-block: 64px; }
  .feature-grid { grid-template-columns: repeat(2, 1fr); }
  .feature-card > i { margin-bottom: 18px; }
  .setup-row, .verify-layout { grid-template-columns: 1fr; }
  .parameter-card { max-width: none; }
}

@media (max-width: 600px) {
  .shell { width: min(calc(100% - 24px), var(--max)); }
  .nav { min-height: 62px; }
  .language-control > i { display: none; }
  .language-control select { max-width: 118px; }
  .hero { padding-block: 45px 68px; gap: 48px; }
  h1 { font-size: clamp(42px, 14vw, 60px); }
  .demo-card { padding: 14px; }
  .nexa-captcha { min-height: 390px; }
  .section { padding-block: 72px; }
  .feature-grid { grid-template-columns: 1fr; }
  .setup-row { gap: 18px; }
  dl div { grid-template-columns: 1fr; gap: 5px; }
  .footer-grid { min-height: 150px; align-items: flex-start; flex-direction: column; justify-content: center; gap: 18px; }
}

@media (prefers-reduced-motion: reduce) {
  :root { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: .01ms !important; transition-duration: .01ms !important; }
  .reveal { opacity: 1; transform: none; }
}