:root {
  --bg: #0b1020;
  --bg-alt: #111a30;
  --text: #eef2ff;
  --muted: #9aa7c7;
  --accent: #3ddc84;
  --accent-ink: #06210f;
  --card: #16203a;
  --radius: 14px;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  padding: 0;
}

body {
  background: radial-gradient(1200px 600px at 50% -10%, #1c2a4d 0%, var(--bg) 60%);
  color: var(--text);
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px 28px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  font-size: 18px;
}

.brand-mark {
  display: inline-grid;
  place-items: center;
  width: 34px;
  height: 34px;
  border-radius: 10px;
  background: var(--accent);
  color: var(--accent-ink);
  font-weight: 800;
  font-size: 14px;
  letter-spacing: -0.5px;
}

.lang {
  display: flex;
  align-items: center;
  gap: 8px;
}

.lang-sep {
  color: var(--muted);
}

.lang-btn {
  background: none;
  border: none;
  color: var(--muted);
  font: inherit;
  font-weight: 600;
  cursor: pointer;
  padding: 4px 6px;
  border-radius: 6px;
}

.lang-btn.active {
  color: var(--text);
  background: var(--bg-alt);
}

.hero {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 48px 24px 24px;
}

.hero-title {
  font-size: clamp(40px, 9vw, 72px);
  line-height: 1;
  margin: 0 0 16px;
  letter-spacing: -1px;
}

.hero-tagline {
  max-width: 520px;
  color: var(--muted);
  font-size: 18px;
  line-height: 1.5;
  margin: 0 0 32px;
}

.cta {
  display: inline-flex;
  flex-direction: column;
  align-items: center;
  gap: 2px;
  background: var(--accent);
  color: var(--accent-ink);
  text-decoration: none;
  font-weight: 700;
  font-size: 18px;
  padding: 14px 34px;
  border-radius: var(--radius);
  box-shadow: 0 10px 30px rgba(61, 220, 132, 0.25);
}

.cta:hover {
  filter: brightness(1.05);
}

.cta-sub {
  font-size: 12px;
  font-weight: 600;
  opacity: 0.7;
}

.soon {
  color: var(--muted);
  font-size: 13px;
  margin: 18px 0 0;
}

.features {
  padding: 24px 28px 48px;
}

.feature-grid {
  list-style: none;
  margin: 0 auto;
  padding: 0;
  max-width: 900px;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 14px;
}

.feature {
  background: var(--card);
  border: 1px solid rgba(255, 255, 255, 0.06);
  border-radius: var(--radius);
  padding: 18px;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.feature strong {
  font-size: 16px;
}

.feature span {
  color: var(--muted);
  font-size: 14px;
  line-height: 1.4;
}

.footer {
  text-align: center;
  color: var(--muted);
  font-size: 13px;
  padding: 20px 24px 28px;
}