:root {
  color-scheme: dark;
  --primary: #2f80ff;
  --background: #0b1020;
  --surface: #11182b;
  --surface-soft: #151e34;
  --text: #ffffff;
  --muted: #a9b3c7;
  --line: rgba(169, 179, 199, 0.18);
}

* {
  box-sizing: border-box;
}

html {
  min-height: 100%;
  background: var(--background);
}

body {
  min-height: 100vh;
  margin: 0;
  background:
    radial-gradient(circle at 50% 0%, rgba(47, 128, 255, 0.2), transparent 36rem),
    var(--background);
  color: var(--text);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.5;
}

body::before {
  position: fixed;
  inset: 0;
  z-index: -1;
  background-image: linear-gradient(rgba(255, 255, 255, 0.035) 1px, transparent 1px);
  background-size: 100% 4rem;
  content: "";
  pointer-events: none;
}

.page-shell {
  display: grid;
  width: min(100%, 68rem);
  min-height: 100vh;
  margin: 0 auto;
  padding: 2.5rem 1.25rem;
  place-content: center;
  gap: 1.35rem;
}

.hero {
  display: grid;
  justify-items: center;
  text-align: center;
}

.hero-copy {
  display: grid;
  justify-items: center;
  gap: 0.8rem;
}

h1,
h2,
p {
  margin: 0;
}

h1 {
  font-size: 3rem;
  font-weight: 760;
  line-height: 0.9;
  letter-spacing: 0;
}

.tagline {
  color: var(--text);
  font-size: 1.55rem;
  font-weight: 650;
  line-height: 1.05;
  letter-spacing: 0;
}

.description {
  max-width: 42rem;
  color: var(--muted);
  font-size: 1.05rem;
}

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

.runtime-list {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.6rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.runtime-list li {
  min-height: 2rem;
  padding: 0.35rem 0.7rem;
  border: 1px solid rgba(47, 128, 255, 0.42);
  border-radius: 999px;
  background: rgba(47, 128, 255, 0.08);
  color: var(--text);
  font-size: 0.9rem;
  font-weight: 620;
}

.status {
  margin-top: 0.35rem;
  color: var(--primary);
  font-size: 0.92rem;
  font-weight: 680;
}

.platforms {
  display: grid;
  justify-items: center;
  gap: 1.1rem;
  padding: 1.35rem 1.25rem;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  text-align: center;
}

.platform-group {
  display: grid;
  gap: 0.25rem;
}

.platform-group h2 {
  font-size: 1rem;
  font-weight: 680;
  letter-spacing: 0;
}

.platform-group p {
  color: var(--muted);
  font-size: 1rem;
}

.panel ul {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.65rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.panel li {
  min-height: 2.25rem;
  padding: 0.45rem 0.75rem;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.035);
  color: var(--muted);
  font-size: 0.95rem;
}

.content-grid {
  display: grid;
  gap: 1rem;
  justify-items: center;
}

.panel {
  display: grid;
  width: 100%;
  max-width: 42rem;
  gap: 1rem;
  padding: 1.25rem;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: linear-gradient(180deg, rgba(17, 24, 43, 0.92), rgba(21, 30, 52, 0.7));
}

.panel h2 {
  color: var(--text);
  font-size: 1rem;
  font-weight: 700;
  letter-spacing: 0;
  text-align: center;
}

.footer {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.5rem 0.9rem;
  color: rgba(169, 179, 199, 0.78);
  font-size: 0.85rem;
  text-align: center;
}

.footer a {
  color: var(--primary);
  text-decoration: none;
  text-underline-offset: 0.18em;
}

.footer a:hover {
  color: var(--text);
  text-decoration: underline;
}

.footer a:focus-visible {
  outline: 2px solid var(--primary);
  outline-offset: 3px;
}

@media (min-width: 48rem) {
  .page-shell {
    padding: 3.5rem 2rem;
    gap: 1.6rem;
  }

  h1 {
    font-size: 6rem;
  }

  .tagline {
    font-size: 2.5rem;
  }

  .description {
    font-size: 1.25rem;
  }

  .platforms {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    align-items: start;
  }

  .platform-group h2 {
    font-size: 1.1rem;
  }

  .platform-group p {
    font-size: 1.05rem;
  }

  .content-grid {
    grid-template-columns: minmax(0, 1fr);
  }

  .panel {
    padding: 1.5rem;
  }
}

@media (min-width: 75rem) {
  h1 {
    font-size: 7.5rem;
  }

  .tagline {
    font-size: 3rem;
  }

  .description {
    font-size: 1.35rem;
  }
}