:root { color-scheme: light; --paper: #f7f9ff; --ink: #101e48; --muted: #52617e; --line: #dbe3f5; --accent: #0754ef; --note: #eaf0ff; }
* { box-sizing: border-box; }
body { margin: 0; background: var(--paper); color: var(--ink); font: 17px/1.65 -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif; }
a { color: inherit; text-underline-offset: 4px; }
a:hover { text-decoration-thickness: 2px; }
a:focus-visible, summary:focus-visible { outline: 3px solid var(--ink); outline-offset: 5px; border-radius: 2px; }
.skip { position: absolute; left: 24px; top: -100px; background: var(--accent); color: white; padding: 8px 16px; z-index: 2; }
.skip:focus { top: 12px; }
.wrap { max-width: 1120px; margin: auto; padding-inline: 32px; }
header { display: flex; align-items: center; justify-content: space-between; gap: 24px; padding-block: 28px; border-bottom: 1px solid var(--line); }
.brand { display: flex; align-items: center; gap: 10px; font-size: 24px; font-weight: 750; letter-spacing: -1px; text-decoration: none; }
.brand img { display: block; width: 40px; height: 40px; border-radius: 10px; }
nav { display: flex; gap: 26px; font-size: 14px; }
nav a { text-decoration: none; }
nav a[aria-current] { text-decoration: underline; }
.eyebrow { font: 600 12px/1.5 ui-monospace, monospace; text-transform: uppercase; letter-spacing: .14em; }
.hero { display: grid; grid-template-columns: 1.3fr 1fr; gap: 70px; align-items: center; padding-block: 92px 88px; }
h1 { font-size: clamp(44px, 6.5vw, 78px); line-height: 1.04; letter-spacing: -.065em; font-weight: 650; margin: 20px 0 28px; }
.lead { color: var(--muted); font-size: 20px; max-width: 550px; }
.button { display: inline-block; padding: 13px 22px; background: var(--accent); color: white; border-radius: 9px; text-decoration: none; font-size: 15px; font-weight: 600; }
.hero .button { margin-top: 16px; }
.app-artwork { margin: 0; }
.app-artwork picture { display: block; overflow: hidden; border-radius: 24%; background: #0754ef; box-shadow: 0 24px 64px -28px #0754ef66; }
.app-artwork img { display: block; width: 100%; height: auto; aspect-ratio: 1; }
.app-artwork figcaption { margin-top: 24px; color: var(--muted); font-size: 14px; text-align: center; }
.intro { border-block: 1px solid var(--line); display: grid; grid-template-columns: 1fr 2fr; gap: 50px; padding-block: 38px; }
h2 { font-size: 27px; line-height: 1.25; letter-spacing: -.035em; font-weight: 650; }
.intro h2 { margin: 0; }
.intro p { margin: 0; color: var(--muted); }
.resources { display: grid; grid-template-columns: 1fr 1fr; gap: 50px; padding-block: 40px 70px; }
.resources p { color: var(--muted); }
.resources a { font-weight: 600; }
footer { border-top: 1px solid var(--line); padding-block: 25px 36px; display: flex; justify-content: space-between; gap: 24px; color: var(--muted); font-size: 13px; }
footer p { margin: 0; }
.article { max-width: 740px; margin: 64px auto 80px; }
.article h1 { font-size: clamp(42px, 6vw, 60px); }
.article h2 { margin-top: 42px; font-size: 25px; }
.article p, .article li { color: var(--muted); }
.article li { padding-left: 6px; margin-bottom: 12px; }
.article ul, .article ol { padding-left: 24px; }
.note { background: var(--note); border-left: 3px solid var(--accent); padding: 16px 22px; margin-block: 28px; }
.note p { margin: 0; }
.contact { padding: 28px; border: 1px solid var(--line); border-radius: 14px; margin-block: 28px; }
.contact h2 { margin-top: 0; }
.email { overflow-wrap: anywhere; }
details { border-top: 1px solid var(--line); padding-block: 20px; }
details:last-of-type { border-bottom: 1px solid var(--line); }
summary { cursor: pointer; font-weight: 600; }
details p { margin-bottom: 0; }
@media (max-width: 720px) {
  .wrap { padding-inline: 22px; }
  header { padding-block: 22px; gap: 14px; }
  nav { gap: 18px; }
  .hero { grid-template-columns: 1fr; gap: 38px; padding-block: 52px; }
  .app-artwork { max-width: 420px; width: 100%; margin-inline: auto; }
  .intro, .resources { grid-template-columns: 1fr; gap: 18px; }
  .resources { gap: 28px; padding-block: 22px 48px; }
  footer { flex-direction: column; gap: 10px; }
  .article { margin-top: 44px; }
  .lead { font-size: 18px; }
}
@media (prefers-color-scheme: dark) {
  :root { color-scheme: dark; --paper: #090f23; --ink: #eef3ff; --muted: #b2c0de; --line: #273454; --accent: #2467ef; --note: #142344; }
}