:root {
  color-scheme: dark;
  --background: #07182c;
  --surface: #0c2139;
  --border: rgba(255, 255, 255, 0.11);
  --text: #f6fbff;
  --muted: #aac0d2;
  --teal: #25c7b7;
  --teal-dark: #062c2b;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  min-height: 100vh;
  margin: 0;
  color: var(--text);
  background:
    radial-gradient(
      circle at top,
      #123655 0,
      var(--background) 55%
    );
  font-family:
    system-ui,
    -apple-system,
    BlinkMacSystemFont,
    "Segoe UI",
    sans-serif;
  line-height: 1.65;
}

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

.site {
  width: min(100% - 40px, 820px);
  margin: 0 auto;
}

header {
  padding: 24px 0;
}

.brand {
  color: var(--text);
  font-weight: 750;
  text-decoration: none;
}

.hero {
  min-height: calc(100vh - 150px);
  display: grid;
  place-items: center;
  padding: 48px 0 70px;
  text-align: center;
}

.hero-inner {
  width: min(100%, 620px);
}

.logo-link {
  display: inline-block;
  line-height: 0;
  border-radius: 28px;
}

.logo-link:focus-visible {
  outline: 3px solid var(--teal);
  outline-offset: 5px;
}

.logo {
  width: 116px;
  height: 116px;
  border-radius: 28px;
  box-shadow: 0 18px 48px rgba(0, 0, 0, 0.3);
}

h1 {
  margin: 22px 0 4px;
  font-size: clamp(2.5rem, 10vw, 4.8rem);
  line-height: 1.05;
}

.tagline {
  margin: 0 0 24px;
  color: var(--teal);
  font-size: 1.25rem;
  font-weight: 700;
}

.free-message {
  display: inline-block;
  margin: 0 0 18px;
  padding: 7px 15px;
  color: var(--teal);
  background: rgba(37, 199, 183, 0.09);
  border: 1px solid rgba(37, 199, 183, 0.35);
  border-radius: 999px;
  font-size: 0.92rem;
  font-weight: 750;
}

.description {
  max-width: 560px;
  margin: 0 auto 30px;
  color: var(--muted);
  font-size: 1.06rem;
}

.download-button {
  display: inline-block;
  padding: 15px 28px;
  color: var(--teal-dark);
  background: var(--teal);
  border-radius: 999px;
  box-shadow: 0 12px 34px rgba(37, 199, 183, 0.25);
  font-weight: 800;
  text-decoration: none;
}

.download-button:hover {
  transform: translateY(-1px);
}

.version {
  margin-top: 16px;
  color: var(--muted);
  font-size: 0.9rem;
}

.features {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
  margin-top: 34px;
}

.feature {
  padding: 15px 10px;
  color: var(--muted);
  background: rgba(12, 33, 57, 0.65);
  border: 1px solid var(--border);
  border-radius: 16px;
  font-size: 0.9rem;
}

.page {
  padding: 45px 0 80px;
}

.page h1 {
  margin-bottom: 28px;
  font-size: clamp(2rem, 7vw, 3.2rem);
}

.page h2 {
  margin-top: 34px;
}

.card {
  margin: 20px 0;
  padding: 24px;
  background: rgba(12, 33, 57, 0.75);
  border: 1px solid var(--border);
  border-radius: 20px;
}

code {
  overflow-wrap: anywhere;
  color: var(--teal);
}

footer {
  padding: 28px 0 40px;
  color: var(--muted);
  text-align: center;
  font-size: 0.85rem;
}

footer nav {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 14px;
  margin-bottom: 12px;
}

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

@media (max-width: 620px) {
  .features {
    grid-template-columns: 1fr;
  }
}