:root {
  color-scheme: dark;
  --bg: #05070b;
  --surface: rgba(15, 23, 42, 0.82);
  --surface-strong: rgba(15, 23, 42, 0.96);
  --line: rgba(148, 163, 184, 0.22);
  --text: #f8fafc;
  --muted: #a7b3c7;
  --cyan: #67e8f9;
  --blue: #60a5fa;
  --green: #34d399;
  --orange: #fb923c;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  color: var(--text);
  background:
    radial-gradient(circle at 15% 10%, rgba(103, 232, 249, 0.12), transparent 34rem),
    radial-gradient(circle at 85% 20%, rgba(251, 146, 60, 0.10), transparent 30rem),
    linear-gradient(180deg, #020408 0%, #07111f 48%, #020408 100%);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.65;
}

a {
  color: inherit;
}

.skip-link {
  position: fixed;
  left: 1rem;
  top: 1rem;
  z-index: 10;
  padding: 0.75rem 1rem;
  border-radius: 999px;
  background: white;
  color: #020408;
  font-weight: 800;
  transform: translateY(-180%);
}

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

.site-header,
.site-footer {
  border-bottom: 1px solid var(--line);
  background: rgba(2, 6, 23, 0.72);
  backdrop-filter: blur(20px);
}

.site-footer {
  border-top: 1px solid var(--line);
  border-bottom: 0;
  margin-top: 4rem;
}

.nav,
.footer-inner,
.page {
  width: min(1120px, calc(100% - 2rem));
  margin: 0 auto;
}

.nav,
.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 1rem 0;
}

.brand {
  text-decoration: none;
  font-weight: 900;
  letter-spacing: -0.04em;
  font-size: 1.3rem;
}

.nav-links,
.footer-links,
.link-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem 1rem;
}

.nav-links a,
.footer-links a,
.link-grid a {
  color: var(--muted);
  text-decoration: none;
  font-weight: 700;
}

.nav-links a:hover,
.footer-links a:hover,
.link-grid a:hover {
  color: var(--cyan);
}

.hero {
  padding: 4rem 0 2.5rem;
}

.eyebrow {
  margin: 0 0 1rem;
  color: var(--cyan);
  font-weight: 900;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  font-size: 0.78rem;
}

h1 {
  max-width: 860px;
  margin: 0;
  font-size: clamp(2.4rem, 8vw, 5rem);
  line-height: 0.96;
  letter-spacing: -0.07em;
}

.lead {
  max-width: 760px;
  margin: 1.4rem 0 0;
  color: var(--muted);
  font-size: clamp(1.08rem, 2vw, 1.25rem);
}

.cta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.8rem;
  margin-top: 2rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 0.82rem 1.1rem;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--surface);
  color: var(--text);
  text-decoration: none;
  font-weight: 900;
}

.btn-primary {
  border-color: rgba(103, 232, 249, 0.5);
  background: linear-gradient(135deg, var(--cyan), var(--blue));
  color: #020408;
}

.grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1rem;
  margin-top: 2rem;
}

.card,
.content-block {
  border: 1px solid var(--line);
  border-radius: 1.4rem;
  background: var(--surface);
  padding: 1.35rem;
  box-shadow: 0 24px 80px rgba(0, 0, 0, 0.22);
}

.content-block {
  margin-top: 1rem;
}

h2 {
  margin: 0 0 0.7rem;
  font-size: clamp(1.5rem, 3vw, 2.2rem);
  line-height: 1.05;
  letter-spacing: -0.04em;
}

h3 {
  margin: 0 0 0.45rem;
  font-size: 1.1rem;
}

p,
li {
  color: var(--muted);
}

ul,
ol {
  padding-left: 1.25rem;
}

.note {
  border-color: rgba(251, 146, 60, 0.42);
  background: rgba(251, 146, 60, 0.08);
}

.question {
  border-left: 3px solid var(--cyan);
  padding-left: 1rem;
}

@media (max-width: 760px) {
  .nav,
  .footer-inner {
    align-items: flex-start;
    flex-direction: column;
  }

  .grid {
    grid-template-columns: 1fr;
  }
}