:root {
  --bg: #0f172a;
  --bg-elevated: #1e293b;
  --bg-card: #243044;
  --text: #f8fafc;
  --muted: #94a3b8;
  --line: rgba(148, 163, 184, 0.22);
  --cyan: #22d3ee;
  --purple: #7c3aed;
  --radius: 18px;
  --max: 920px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: Inter, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background:
    radial-gradient(1200px 500px at 10% -10%, rgba(34, 211, 238, 0.16), transparent 50%),
    radial-gradient(900px 400px at 100% 0%, rgba(124, 58, 237, 0.18), transparent 45%),
    var(--bg);
  color: var(--text);
  line-height: 1.65;
}

a {
  color: var(--cyan);
}

.skip {
  position: absolute;
  left: -999px;
  top: 0;
}

.skip:focus {
  left: 12px;
  top: 12px;
  z-index: 20;
  background: var(--bg-elevated);
  padding: 8px 12px;
  border-radius: 8px;
}

.wrap {
  width: min(calc(100% - 32px), var(--max));
  margin: 0 auto;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  backdrop-filter: blur(14px);
  background: rgba(15, 23, 42, 0.82);
  border-bottom: 1px solid var(--line);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 14px 0;
}

.header-tools {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: flex-end;
  gap: 12px 20px;
}

.lang {
  display: flex;
  gap: 8px;
  margin: 0;
  font-size: 0.85rem;
  font-weight: 700;
}

.lang a,
.lang span {
  color: var(--muted);
  text-decoration: none;
}

.lang [aria-current="true"] {
  color: var(--text);
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--text);
  text-decoration: none;
  font-weight: 700;
  letter-spacing: 0.02em;
}

.brand img {
  width: 40px;
  height: 40px;
  border-radius: 12px;
}

nav {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 8px 16px;
}

nav a {
  color: var(--muted);
  text-decoration: none;
  font-size: 0.95rem;
}

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

.hero {
  padding: 72px 0 40px;
  text-align: center;
}

.hero img {
  width: 112px;
  height: 112px;
  border-radius: 28px;
  box-shadow: 0 20px 50px rgba(34, 211, 238, 0.15);
}

.hero h1 {
  margin: 20px 0 8px;
  font-size: clamp(2rem, 5vw, 3.2rem);
  letter-spacing: -0.03em;
}

.lede {
  margin: 0 auto 28px;
  max-width: 640px;
  color: var(--muted);
  font-size: 1.15rem;
}

.actions {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 12px;
}

.btn {
  display: inline-block;
  padding: 12px 18px;
  border-radius: 999px;
  text-decoration: none;
  font-weight: 600;
}

.btn-primary {
  color: #041016;
  background: linear-gradient(90deg, var(--cyan), var(--purple));
}

.btn-ghost {
  color: var(--text);
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.03);
}

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 16px;
  padding: 8px 0 56px;
}

.card {
  padding: 22px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--bg-elevated);
}

.card h2 {
  margin: 0 0 8px;
  font-size: 1.15rem;
}

.card p {
  margin: 0;
  color: var(--muted);
}

.legal {
  padding: 48px 0 72px;
}

.legal header {
  margin-bottom: 28px;
}

.legal h1 {
  margin: 0 0 8px;
  font-size: clamp(1.8rem, 4vw, 2.6rem);
  letter-spacing: -0.03em;
}

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

.legal h2 {
  margin-top: 32px;
  font-size: 1.25rem;
}

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

.notice {
  padding: 14px 16px;
  border-left: 3px solid var(--cyan);
  border-radius: 10px;
  background: rgba(34, 211, 238, 0.08);
  color: var(--muted);
}

.site-footer {
  border-top: 1px solid var(--line);
  padding: 28px 0 40px;
  color: var(--muted);
  font-size: 0.95rem;
}

.site-footer nav {
  justify-content: flex-start;
  margin: 10px 0 16px;
}

@media (max-width: 700px) {
  .header-inner {
    flex-direction: column;
    align-items: flex-start;
  }

  nav {
    justify-content: flex-start;
  }
}