:root {
  color-scheme: dark;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background: #080b18;
  color: #f4f7ff;
  font-synthesis: none;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-width: 320px;
  background:
    radial-gradient(circle at 15% 10%, rgba(0, 224, 255, 0.14), transparent 30rem),
    radial-gradient(circle at 85% 25%, rgba(255, 75, 137, 0.12), transparent 26rem),
    #080b18;
}

a {
  color: #66e9ff;
}

a:hover {
  color: #a6f4ff;
}

.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
}

.skip-link:focus {
  left: 1rem;
  top: 1rem;
  z-index: 10;
  padding: 0.75rem 1rem;
  border-radius: 0.5rem;
  background: #ffffff;
  color: #080b18;
}

header,
main,
footer {
  width: min(100% - 2rem, 820px);
  margin-inline: auto;
}

header {
  padding: 4.5rem 0 2rem;
}

.eyebrow {
  margin: 0 0 0.75rem;
  color: #66e9ff;
  font-size: 0.8rem;
  font-weight: 800;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

h1,
h2 {
  line-height: 1.15;
}

h1 {
  max-width: 680px;
  margin: 0;
  font-size: clamp(2.25rem, 7vw, 4.5rem);
  letter-spacing: -0.05em;
}

.intro {
  max-width: 680px;
  margin: 1.25rem 0 0;
  color: #b9c3dc;
  font-size: 1.1rem;
  line-height: 1.7;
}

nav {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 2rem;
}

.language-nav {
  gap: 0.5rem;
  margin-top: 1rem;
}

.language-nav a {
  min-height: 36px;
  padding: 0.45rem 0.7rem;
  font-size: 0.8rem;
}

.language-nav a[aria-current="page"] {
  border-color: #66e9ff;
  background: rgba(102, 233, 255, 0.13);
  color: #ffffff;
}

nav a,
.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 0.7rem 1rem;
  border: 1px solid rgba(102, 233, 255, 0.35);
  border-radius: 999px;
  color: #f4f7ff;
  font-weight: 700;
  text-decoration: none;
}

nav a:hover,
.button:hover {
  border-color: #66e9ff;
  background: rgba(102, 233, 255, 0.1);
  color: #ffffff;
}

.button.primary {
  border-color: transparent;
  background: linear-gradient(135deg, #00cce8, #008cff);
  color: #031019;
}

.button.primary:hover {
  filter: brightness(1.08);
}

section {
  margin: 1rem 0;
  padding: clamp(1.25rem, 4vw, 2rem);
  border: 1px solid rgba(255, 255, 255, 0.09);
  border-radius: 1.25rem;
  background: rgba(18, 23, 43, 0.82);
  box-shadow: 0 18px 50px rgba(0, 0, 0, 0.18);
}

section.highlight {
  border-color: rgba(255, 75, 137, 0.48);
  background: linear-gradient(145deg, rgba(255, 75, 137, 0.1), rgba(18, 23, 43, 0.9));
}

h2 {
  margin: 0 0 1rem;
  font-size: clamp(1.35rem, 4vw, 1.75rem);
}

p,
li {
  color: #c9d1e5;
  line-height: 1.7;
}

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

li + li {
  margin-top: 0.55rem;
}

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

.note {
  padding: 1rem;
  border-left: 3px solid #66e9ff;
  background: rgba(102, 233, 255, 0.07);
}

footer {
  padding: 2rem 0 3rem;
  color: #8995b1;
  font-size: 0.9rem;
}

@media (max-width: 520px) {
  header {
    padding-top: 3rem;
  }

  .actions .button {
    width: 100%;
  }
}