:root {
  color-scheme: light dark;
  --background: #fafbfc;
  --text: #1d2025;
  --secondary: #59616d;
  --line: #e1e5eb;
  --accent: #0068d9;
  font-family: -apple-system, BlinkMacSystemFont, "Helvetica Neue", sans-serif;
  font-size: 16px;
  line-height: 1.6;
  background: var(--background);
  color: var(--text);
}
* { box-sizing: border-box; }
body { margin: 0; }
main, footer { width: min(960px, calc(100% - 48px)); margin-inline: auto; }
a { color: var(--accent); text-underline-offset: 4px; }
a:focus-visible, button:focus-visible { outline: 3px solid var(--accent); outline-offset: 5px; }
.hero { padding: 72px 0 68px; text-align: center; }
.app-icon { display: block; margin: 0 auto 24px; border-radius: 30px; }
.eyebrow { margin: 0 0 6px; font-size: .75rem; font-weight: 600; letter-spacing: .16em; color: var(--secondary); }
h1 { margin: 0; font-size: clamp(3rem, 7vw, 4.5rem); line-height: 1.15; letter-spacing: -.045em; font-weight: 650; }
.tagline { margin: 16px 0 12px; font-size: clamp(1.5rem, 4vw, 2rem); line-height: 1.3; letter-spacing: -.025em; font-weight: 500; }
.intro { max-width: 600px; margin: 0 auto; font-size: 1.125rem; color: var(--secondary); }
.download { margin-top: 30px; }
.button { display: inline-block; padding: 12px 28px; border: 0; border-radius: 999px; background: var(--accent); color: #fff; font: inherit; font-weight: 600; text-decoration: none; }
a.button:hover { background: #005abd; }
.button:disabled { background: #e6e9ee; color: #59616d; cursor: default; }
.requirements { margin: 12px 0 0; font-size: .875rem; color: var(--secondary); }
.release-link { display: inline-block; margin-top: 8px; font-size: .875rem; }
.features { display: grid; grid-template-columns: repeat(3, 1fr); gap: 36px; border-top: 1px solid var(--line); padding: 36px 0 44px; }
h2 { margin: 0 0 8px; font-size: 1.125rem; line-height: 1.4; font-weight: 600; letter-spacing: -.015em; }
.features p { margin: 0; color: var(--secondary); }
footer { border-top: 1px solid var(--line); display: flex; flex-wrap: wrap; justify-content: space-between; gap: 16px; padding: 24px 0 32px; font-size: .875rem; color: var(--secondary); }
.notes { max-width: 680px; padding: 56px 0 64px; min-height: 70vh; }
.notes h1 { margin: 28px 0 24px; font-size: 2.5rem; }
.notes article { border-top: 1px solid var(--line); margin-top: 28px; padding-top: 28px; }
.notes time, .notes .metadata { color: var(--secondary); font-size: .875rem; }
.notes li { margin: 8px 0; }
@media (max-width: 640px) {
  main, footer { width: calc(100% - 40px); }
  .hero { padding: 48px 0; }
  .app-icon { width: 136px; height: 136px; }
  .features { grid-template-columns: 1fr; gap: 28px; }
  .desktop-break { display: none; }
}
@media (prefers-color-scheme: dark) {
  :root { --background: #131519; --text: #f4f5f7; --secondary: #a7afbb; --line: #303640; --accent: #70b5ff; }
  .button { background: #0878ed; color: #fff; }
  a.button:hover { background: #0068d9; }
  .button:disabled { background: #303640; color: #b8c0cc; }
}