:root {
  --bg: #0a0a0f;
  --surface: #15151c;
  --text: #f2f2f5;
  --muted: #b8b8c4;
  --accent: #e53935;
  --check: #2dbe60;
  --line: rgba(255, 255, 255, 0.08);
}

* { box-sizing: border-box; margin: 0; padding: 0; }

html { -webkit-text-size-adjust: 100%; }

body {
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", system-ui, sans-serif;
  font-size: 17px;
  line-height: 1.55;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

a { color: var(--text); text-decoration: none; border-bottom: 1px solid var(--line); }
a:hover { border-bottom-color: var(--text); }

header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 24px 32px;
  max-width: 980px;
  margin: 0 auto;
  width: 100%;
}

header .brand {
  display: flex;
  align-items: center;
  gap: 12px;
  font-weight: 600;
  font-size: 18px;
  letter-spacing: 0.5px;
  border: none;
}

header .brand .mark {
  width: 32px;
  height: 32px;
  border-radius: 8px;
  background: var(--accent);
  display: grid;
  place-items: center;
  color: white;
  font-weight: 700;
  font-size: 18px;
}

nav.lang {
  display: flex;
  gap: 8px;
  font-size: 13px;
}

nav.lang a {
  border: none;
  color: var(--muted);
  padding: 4px 10px;
  border-radius: 999px;
}

nav.lang a.active {
  background: var(--surface);
  color: var(--text);
}

main {
  flex: 1;
  max-width: 720px;
  margin: 0 auto;
  padding: 32px;
  width: 100%;
}

.hero {
  padding: 64px 0 56px;
  text-align: left;
}

.hero h1 {
  font-size: 56px;
  font-weight: 700;
  letter-spacing: -1.5px;
  line-height: 1.05;
}

.hero .tagline {
  margin-top: 20px;
  font-size: 22px;
  color: var(--muted);
  max-width: 560px;
  font-weight: 400;
}

section.features {
  display: grid;
  grid-template-columns: 1fr;
  gap: 24px;
  padding: 24px 0;
}

.feature {
  background: var(--surface);
  border-radius: 16px;
  padding: 24px;
}

.feature h3 {
  font-size: 17px;
  font-weight: 600;
  margin-bottom: 6px;
  display: flex;
  align-items: center;
  gap: 10px;
}

.feature h3 .dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--check);
}

.feature p {
  color: var(--muted);
  font-size: 15px;
  line-height: 1.55;
}

section.privacy {
  padding: 32px 0 8px;
  font-size: 15px;
  color: var(--muted);
}

footer {
  padding: 48px 32px 32px;
  text-align: center;
  font-size: 13px;
  color: var(--muted);
  max-width: 980px;
  margin: 0 auto;
  width: 100%;
}

footer .small { margin-top: 8px; opacity: 0.7; font-size: 12px; }

@media (min-width: 720px) {
  section.features { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 480px) {
  header, footer { padding-left: 20px; padding-right: 20px; }
  main { padding: 24px 20px; }
  .hero { padding: 32px 0 40px; }
  .hero h1 { font-size: 40px; letter-spacing: -1px; }
  .hero .tagline { font-size: 18px; }
}