:root {
  --bg: #0b0d14;
  --bg-raised: #141824;
  --border: #252b3b;
  --text: #f2f2f2;
  --text-muted: #a3a9b8;
  --blue: #2e78c2;
  --blue-hover: #3a88d6;
  --blue-light: #6aaef0;
  --radius: 10px;
}

* {
  box-sizing: border-box;
}

html {
  color-scheme: dark;
}

body {
  margin: 0;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  font-family: 'Poppins', system-ui, -apple-system, sans-serif;
  line-height: 1.6;
  color: var(--text);
  background-color: var(--bg);
  /* A sparse starfield behind a faint blue glow. */
  background-image:
    radial-gradient(ellipse 80% 50% at 50% 0%, rgba(46, 120, 194, 0.22), transparent 70%),
    radial-gradient(1px 1px at 12% 18%, #fff8, transparent),
    radial-gradient(1px 1px at 28% 62%, #fff6, transparent),
    radial-gradient(1.5px 1.5px at 41% 9%, #fffa, transparent),
    radial-gradient(1px 1px at 57% 41%, #fff5, transparent),
    radial-gradient(1px 1px at 69% 14%, #fff8, transparent),
    radial-gradient(1.5px 1.5px at 83% 33%, #fff9, transparent),
    radial-gradient(1px 1px at 91% 71%, #fff5, transparent),
    radial-gradient(1px 1px at 7% 84%, #fff6, transparent),
    radial-gradient(1px 1px at 76% 88%, #fff4, transparent);
  background-repeat: no-repeat;
}

a {
  color: var(--blue-light);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  max-width: 1040px;
  width: 100%;
  margin: 0 auto;
  padding: 20px 16px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--text);
  text-decoration: none;
  font-weight: 800;
  letter-spacing: 0.12em;
}

.nav-link {
  font-weight: 500;
  font-size: 0.95rem;
  text-decoration: none;
  white-space: nowrap;
}

.nav-link:hover {
  text-decoration: underline;
}

main {
  flex: 1;
  width: 100%;
  max-width: 1040px;
  margin: 0 auto;
  padding: 0 16px;
}

.hero {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  padding: 56px 0 72px;
}

.hero-logo {
  width: 120px;
  height: auto;
  margin-bottom: 28px;
  filter: drop-shadow(0 0 28px rgba(106, 174, 240, 0.35));
}

h1 {
  margin: 0;
  font-size: clamp(2rem, 6vw, 3.4rem);
  font-weight: 800;
  line-height: 1.15;
  letter-spacing: -0.01em;
}

.lede {
  max-width: 34em;
  margin: 20px 0 0;
  font-size: clamp(1.05rem, 2.4vw, 1.2rem);
  color: var(--text-muted);
}

.actions {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 12px;
  margin-top: 36px;
}

.button {
  display: inline-block;
  padding: 14px 26px;
  border-radius: var(--radius);
  font-weight: 600;
  font-size: 1rem;
  text-decoration: none;
  transition: background-color 0.15s, border-color 0.15s;
}

.button.primary {
  background: var(--blue);
  color: #fff;
}

.button.primary:hover {
  background: var(--blue-hover);
}

.button.secondary {
  border: 1px solid var(--border);
  background: var(--bg-raised);
  color: var(--text);
}

.button.secondary:hover {
  border-color: var(--blue);
}

.button:focus-visible,
summary:focus-visible {
  outline: 2px solid var(--blue-light);
  outline-offset: 3px;
}

.fine-print {
  margin: 16px 0 0;
  font-size: 0.85rem;
  color: var(--text-muted);
}

.install-help {
  width: 100%;
  max-width: 560px;
  margin-top: 28px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--bg-raised);
  text-align: left;
  font-size: 0.92rem;
  color: var(--text-muted);
}

.install-help summary {
  padding: 12px 16px;
  cursor: pointer;
  font-weight: 500;
  color: var(--text);
}

.install-help > :not(summary) {
  margin-left: 16px;
  margin-right: 16px;
}

.install-help ol {
  padding-left: 20px;
}

.install-help li + li {
  margin-top: 6px;
}

.install-help strong {
  color: var(--text);
  font-weight: 500;
}

.install-help pre {
  margin-bottom: 16px;
  padding: 10px 12px;
  overflow-x: auto;
  border-radius: 6px;
  background: var(--bg);
  font-size: 0.82rem;
}

.features {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 16px;
  padding-bottom: 72px;
}

.features article {
  padding: 24px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--bg-raised);
}

.features h2 {
  margin: 0 0 8px;
  font-size: 1.1rem;
  font-weight: 600;
}

.features p {
  margin: 0;
  color: var(--text-muted);
}

footer {
  padding: 24px 16px;
  border-top: 1px solid var(--border);
  text-align: center;
  font-size: 0.85rem;
  color: var(--text-muted);
}

footer p {
  margin: 0;
}