:root {
  --bg: #0a0e14;
  --bg-glow: #1a2233;
  --primary: #4fdbc8;
  --on-primary: #003731;
  --secondary: #adc6ff;
  --on-surface: #dfe2eb;
  --muted: #bbcac6;
  --border: rgba(255, 255, 255, 0.08);
  --glass: rgba(255, 255, 255, 0.04);
  --card: rgba(10, 14, 20, 0.92);
  --max: 920px;
  --radius: 16px;
  font-family: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--on-surface);
  background: radial-gradient(ellipse 120% 80% at 20% -10%, var(--bg-glow), var(--bg));
  min-height: 100vh;
  line-height: 1.65;
  font-size: 15px;
}

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

a:hover {
  text-decoration: underline;
}

.wrap {
  max-width: var(--max);
  margin: 0 auto;
  padding: 24px 20px 64px;
}

header {
  text-align: center;
  padding: 32px 0 28px;
}

.logo {
  width: 72px;
  height: 72px;
  margin: 0 auto 16px;
  border-radius: 18px;
  background: linear-gradient(135deg, var(--primary), rgba(79, 219, 200, 0.35));
  display: grid;
  place-items: center;
  font-weight: 800;
  font-size: 28px;
  color: var(--on-primary);
  box-shadow: 0 0 40px rgba(79, 219, 200, 0.2);
}

h1 {
  margin: 0 0 8px;
  font-size: clamp(1.5rem, 4vw, 2rem);
  font-weight: 700;
  background: linear-gradient(90deg, var(--primary), #99e8dc);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.subtitle {
  color: var(--muted);
  font-size: 0.95rem;
  margin: 0;
}

.nav {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  justify-content: center;
  margin: 24px 0 32px;
}

.nav a,
.nav span {
  padding: 8px 14px;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: var(--glass);
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--muted);
}

.nav a:hover {
  color: var(--primary);
  border-color: rgba(79, 219, 200, 0.35);
  text-decoration: none;
}

.lang-block {
  margin-bottom: 40px;
  padding: 28px 24px;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  background: var(--card);
  backdrop-filter: blur(12px);
}

.lang-label {
  display: inline-block;
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--primary);
  margin-bottom: 20px;
  padding: 4px 10px;
  border-radius: 6px;
  background: rgba(79, 219, 200, 0.12);
}

h2 {
  font-size: 1.05rem;
  color: var(--on-surface);
  margin: 28px 0 10px;
  font-weight: 700;
}

h2:first-of-type {
  margin-top: 0;
}

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

ul {
  padding-left: 1.2rem;
}

.meta {
  font-size: 0.85rem;
  color: var(--muted);
  margin-top: 32px;
  padding-top: 20px;
  border-top: 1px solid var(--border);
}

footer {
  text-align: center;
  color: var(--muted);
  font-size: 0.8rem;
  padding-top: 16px;
}

.card-grid {
  display: grid;
  gap: 14px;
  margin: 16px 0;
}

.card {
  padding: 16px 18px;
  border-radius: 12px;
  border: 1px solid var(--border);
  background: rgba(255, 255, 255, 0.02);
}

.card strong {
  color: var(--on-surface);
  display: block;
  margin-bottom: 6px;
}

@media (min-width: 768px) {
  .lang-block {
    padding: 32px 36px;
  }
}