:root {
  color-scheme: light;
  --bg: #f7f6fb;
  --surface: #ffffff;
  --text: #211b32;
  --muted: #676174;
  --purple: #6d45d6;
  --purple-dark: #4e2ca9;
  --yellow: #ffd31a;
  --line: #e4dfed;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.55;
}

a {
  color: var(--purple-dark);
  font-weight: 650;
}

.shell {
  width: min(960px, calc(100% - 40px));
  margin: 0 auto;
}

header {
  border-bottom: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.88);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  min-height: 72px;
}

.brand {
  color: var(--text);
  font-size: 20px;
  font-weight: 800;
  text-decoration: none;
}

.links {
  display: flex;
  flex-wrap: wrap;
  gap: 18px;
}

.links a {
  color: var(--muted);
  font-size: 15px;
  text-decoration: none;
}

.hero {
  padding: 72px 0 48px;
  text-align: center;
}

.hero-icon {
  width: 128px;
  height: 128px;
  margin-bottom: 28px;
  border-radius: 30px;
  box-shadow: 0 18px 44px rgba(78, 44, 169, 0.22);
}

.hero h1 {
  max-width: 760px;
  margin: 0 auto 16px;
  font-size: clamp(42px, 7vw, 72px);
  line-height: 0.98;
}

.lead {
  max-width: 680px;
  margin: 0 auto;
  color: var(--muted);
  font-size: 20px;
}

.button {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  margin-top: 28px;
  padding: 0 20px;
  border-radius: 12px;
  background: var(--purple);
  color: #ffffff;
  text-decoration: none;
}

.button:hover,
.button:focus-visible {
  background: var(--purple-dark);
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  width: min(1100px, calc(100% - 40px));
  margin: 32px auto 72px;
}

.item,
.panel {
  padding: 24px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: var(--surface);
}

.item h2,
.panel h2,
main h2 {
  margin: 0 0 10px;
  font-size: 22px;
}

.item p,
.panel p {
  margin: 0;
  color: var(--muted);
}

main {
  padding: 48px 0 64px;
}

main h1 {
  margin: 0 0 18px;
  font-size: 42px;
  line-height: 1.05;
}

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

main section {
  margin-top: 34px;
}

.panel {
  margin: 28px 0;
}

.language-links {
  display: flex;
  gap: 16px;
  margin-bottom: 32px;
}

footer {
  padding: 28px 0;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 14px;
}

@media (max-width: 720px) {
  .nav {
    align-items: flex-start;
    flex-direction: column;
    padding: 18px 0;
  }

  .feature-grid {
    grid-template-columns: 1fr;
  }

  .hero {
    padding-top: 48px;
  }
}