:root {
  --bg: #0f1419;
  --surface: #18222d;
  --accent: #3d9cff;
  --accent2: #5ce1a8;
  --text: #e8eef5;
  --muted: #9fb0c3;
  --maxw: 52rem;
  --font: system-ui, -apple-system, "Segoe UI", Roboto, Ubuntu, Cantarell, sans-serif;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  font-size: 100%;
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: var(--font);
  background: radial-gradient(ellipse 120% 80% at 50% -20%, #1a2740, var(--bg));
  color: var(--text);
  line-height: 1.65;
}

a {
  color: var(--accent);
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
}

a:hover {
  color: var(--accent2);
}

.skip-link {
  position: absolute;
  left: -9999px;
}

.skip-link:focus {
  left: 1rem;
  top: 1rem;
  z-index: 100;
  padding: 0.5rem 1rem;
  background: var(--surface);
  border-radius: 8px;
}

header {
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  background: rgba(15, 20, 25, 0.85);
  backdrop-filter: blur(8px);
  position: sticky;
  top: 0;
  z-index: 10;
}

.wrap {
  max-width: calc(var(--maxw) + 3rem);
  margin: 0 auto;
  padding: 1.25rem 1.25rem;
}

.brand {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 0.75rem;
}

.brand strong {
  font-size: 1.125rem;
  letter-spacing: 0.03em;
}

.brand span {
  color: var(--muted);
  font-size: 0.9rem;
}

nav ul {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
}

nav a {
  color: var(--muted);
  text-decoration: none;
}

nav a:hover,
nav a[aria-current="page"] {
  color: var(--text);
}

main {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 2.5rem 1.25rem 4rem;
}

.hero {
  margin-bottom: 2.25rem;
}

.hero h1 {
  font-size: clamp(1.75rem, 4vw, 2.35rem);
  line-height: 1.25;
  margin: 0 0 0.75rem;
}

.hero p.lead {
  font-size: 1.125rem;
  color: var(--muted);
  max-width: 40rem;
}

.btn-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 1.5rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  padding: 0.65rem 1.1rem;
  border-radius: 10px;
  font-weight: 600;
  text-decoration: none;
  border: 1px solid transparent;
}

.btn-primary {
  background: linear-gradient(135deg, var(--accent), #2563b8);
  color: #fff;
}

.btn-secondary {
  background: var(--surface);
  color: var(--text);
  border-color: rgba(255, 255, 255, 0.12);
}

.card {
  background: var(--surface);
  border-radius: 14px;
  padding: 1.25rem 1.35rem;
  border: 1px solid rgba(255, 255, 255, 0.06);
  margin-bottom: 1rem;
}

.card h2 {
  margin-top: 0;
  font-size: 1.15rem;
}

.muted {
  color: var(--muted);
  font-size: 0.95rem;
}

footer {
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  padding: 2rem 1.25rem;
  background: #0b0f14;
}

footer .cols {
  max-width: calc(var(--maxw) + 3rem);
  margin: 0 auto;
  display: grid;
  gap: 1.5rem;
  grid-template-columns: repeat(auto-fit, minmax(12rem, 1fr));
}

footer h3 {
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--muted);
  margin: 0 0 0.75rem;
}

footer ul {
  list-style: none;
  padding: 0;
  margin: 0;
}

footer li {
  margin-bottom: 0.5rem;
}

footer a {
  color: var(--muted);
  text-decoration: none;
}

footer a:hover {
  color: var(--text);
}

.tiny {
  font-size: 0.8rem;
  color: var(--muted);
  margin-top: 2rem;
  text-align: center;
}

ul.plain {
  padding-left: 1.2rem;
}

ul.plain li {
  margin-bottom: 0.35rem;
}

@media (max-width: 640px) {
  nav ul {
    gap: 0.65rem;
  }
}