:root {
  color-scheme: dark;
  --bg: #071018;
  --surface: #0d1820;
  --surface-soft: #101e27;
  --border: #263741;
  --text: #f4f8f6;
  --muted: #a6b5bd;
  --mint: #00e676;
  --mint-soft: rgba(0, 230, 118, .12);
  --max: 1120px;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background:
    radial-gradient(circle at 80% 0%, rgba(0, 230, 118, .07), transparent 28rem),
    var(--bg);
  color: var(--text);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.65;
}

a { color: inherit; }

img { max-width: 100%; }

.skip-link {
  position: fixed;
  top: 12px;
  left: 12px;
  z-index: 20;
  padding: 10px 14px;
  border-radius: 10px;
  background: var(--mint);
  color: #03110b;
  font-weight: 850;
  transform: translateY(-180%);
}

.skip-link:focus { transform: translateY(0); }

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  border-bottom: 1px solid rgba(255, 255, 255, .08);
  background: rgba(7, 16, 24, .9);
  backdrop-filter: blur(18px);
}

.site-header-inner,
.page-shell,
.site-footer-inner {
  width: min(calc(100% - 36px), var(--max));
  margin-inline: auto;
}

.site-header-inner {
  min-height: 74px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 22px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 11px;
  text-decoration: none;
}

.brand img { width: 34px; height: 34px; }

.brand span { display: grid; line-height: 1; }

.brand strong { letter-spacing: .2em; font-size: .95rem; }

.brand small {
  margin-top: 6px;
  color: var(--mint);
  font-size: .55rem;
  font-weight: 850;
  letter-spacing: .16em;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 18px;
  font-size: .82rem;
  font-weight: 750;
}

.site-nav a { color: var(--muted); text-decoration: none; }
.site-nav a:hover,
.site-nav a:focus-visible { color: var(--text); }

.button {
  display: inline-flex;
  min-height: 46px;
  align-items: center;
  justify-content: center;
  padding: 0 19px;
  border: 1px solid var(--mint);
  border-radius: 13px;
  background: var(--mint);
  color: #03110b;
  font-weight: 900;
  text-decoration: none;
}

.button.secondary {
  border-color: var(--border);
  background: transparent;
  color: var(--text);
}

.page-shell { padding: 24px 0 82px; }

.breadcrumbs {
  margin: 16px 0 0;
  color: var(--muted);
  font-size: .78rem;
}

.breadcrumbs a { color: var(--mint); text-decoration: none; }

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.25fr) minmax(260px, .75fr);
  gap: clamp(34px, 7vw, 86px);
  align-items: center;
  min-height: 560px;
  padding: 72px 0 64px;
}

.eyebrow {
  display: block;
  color: var(--mint);
  font-size: .72rem;
  font-weight: 900;
  letter-spacing: .18em;
}

h1,
h2,
h3 { line-height: 1.08; }

h1 {
  max-width: 820px;
  margin: 14px 0 20px;
  font-size: clamp(2.75rem, 7.2vw, 5.8rem);
  letter-spacing: -.055em;
}

.hero-copy > p {
  max-width: 700px;
  margin: 0;
  color: var(--muted);
  font-size: clamp(1.05rem, 2vw, 1.28rem);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 30px;
}

.hero-card,
.content-card,
.step,
.answer,
.callout {
  border: 1px solid var(--border);
  border-radius: 22px;
  background: linear-gradient(145deg, rgba(255, 255, 255, .035), rgba(255, 255, 255, .012));
}

.hero-card { padding: 26px; }

.hero-card strong {
  display: block;
  margin-bottom: 16px;
  font-size: 1.12rem;
}

.hero-card ul,
.content-card ul {
  margin: 0;
  padding: 0;
  list-style: none;
}

.hero-card li,
.content-card li {
  position: relative;
  padding: 11px 0 11px 25px;
  border-top: 1px solid rgba(255, 255, 255, .07);
  color: var(--muted);
}

.hero-card li::before,
.content-card li::before {
  content: "";
  position: absolute;
  left: 2px;
  top: 19px;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--mint);
  box-shadow: 0 0 0 5px var(--mint-soft);
}

.section {
  padding: 64px 0;
  border-top: 1px solid rgba(255, 255, 255, .08);
}

.section-heading {
  display: grid;
  grid-template-columns: minmax(0, .85fr) minmax(260px, 1.15fr);
  gap: 32px;
  margin-bottom: 30px;
}

.section-heading h2 {
  margin: 10px 0 0;
  font-size: clamp(2rem, 4.8vw, 3.7rem);
  letter-spacing: -.04em;
}

.section-heading p,
.content-card p,
.step p,
.answer p,
.callout p,
.prose p { color: var(--muted); }

.card-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
}

.content-card { padding: 25px; }
.content-card h3 { margin: 8px 0 10px; font-size: 1.3rem; }

.steps {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 14px;
  counter-reset: cadvyn-steps;
}

.step { padding: 23px; counter-increment: cadvyn-steps; }
.step::before {
  content: "0" counter(cadvyn-steps);
  display: block;
  margin-bottom: 28px;
  color: var(--mint);
  font-size: .72rem;
  font-weight: 900;
  letter-spacing: .14em;
}
.step h3 { margin: 0 0 8px; }

.two-column {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: 18px;
}

.callout {
  padding: clamp(26px, 5vw, 48px);
  border-color: rgba(0, 230, 118, .34);
  background: radial-gradient(circle at 88% 0%, rgba(0, 230, 118, .14), transparent 38%), var(--surface);
}

.callout h2 {
  max-width: 760px;
  margin: 10px 0 12px;
  font-size: clamp(2rem, 4.5vw, 3.5rem);
  letter-spacing: -.04em;
}

.faq { display: grid; gap: 10px; }

.answer { padding: 0 22px; }
.answer summary { padding: 20px 0; cursor: pointer; font-weight: 850; }
.answer p { margin: -4px 0 22px; }

.byline {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 18px;
  margin-top: 22px;
  color: var(--muted);
  font-size: .78rem;
}

.prose { max-width: 800px; }
.prose h2 { margin-top: 48px; font-size: clamp(1.7rem, 4vw, 2.65rem); }
.prose h3 { margin-top: 30px; }
.prose a { color: var(--mint); }

.site-footer {
  border-top: 1px solid rgba(255, 255, 255, .08);
  color: var(--muted);
}

.site-footer-inner {
  display: grid;
  grid-template-columns: 1fr 1.4fr;
  gap: 28px;
  padding: 34px 0 calc(34px + env(safe-area-inset-bottom));
  font-size: .78rem;
}

.site-footer nav {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 10px 18px;
}

.site-footer a { color: var(--muted); text-decoration: none; }
.site-footer a:hover,
.site-footer a:focus-visible { color: var(--mint); }

@media (max-width: 900px) {
  .site-nav > a:not(.button) { display: none; }
  .hero,
  .section-heading { grid-template-columns: 1fr; }
  .hero { min-height: 0; padding-top: 58px; }
  .card-grid { grid-template-columns: 1fr 1fr; }
  .steps { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 620px) {
  .site-header-inner,
  .page-shell,
  .site-footer-inner { width: min(calc(100% - 28px), var(--max)); }
  .site-header-inner { min-height: 66px; }
  .site-nav .button { min-height: 42px; padding-inline: 13px; }
  .brand small { display: none; }
  .hero { padding: 46px 0 48px; }
  h1 { font-size: clamp(2.55rem, 14vw, 4.3rem); }
  .hero-actions > * { width: 100%; }
  .section { padding: 48px 0; }
  .card-grid,
  .steps,
  .two-column,
  .site-footer-inner { grid-template-columns: 1fr; }
  .site-footer nav { justify-content: flex-start; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
}