:root {
  --primary: #4f5ea8;
  --primary-dark: #364172;
  --primary-light: #eef1fb;
  --sky: #4bb6ef;
  --text: #1d2630;
  --muted: #5b6b79;
  --border: #e4e6eb;
  --bg: #f8f9fa;
  --surface: #ffffff;
  --radius: 12px;
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  font: 16px/1.6 -apple-system, BlinkMacSystemFont, 'Segoe UI', Inter, Roboto, Helvetica, Arial, sans-serif;
  color: var(--text);
  background: var(--bg);
}
a { color: var(--primary); }
a:focus-visible, .btn:focus-visible { outline: 3px solid var(--sky); outline-offset: 2px; }
.wrap { max-width: 1080px; margin: 0 auto; padding: 0 24px; }
.skip { position: absolute; left: -9999px; }
.skip:focus { left: 16px; top: 16px; background: #fff; padding: 8px 12px; z-index: 10; }

header.top { background: var(--surface); border-bottom: 1px solid var(--border); }
header.top .wrap { display: flex; align-items: center; justify-content: space-between; height: 68px; gap: 16px; }
header.top img { height: 34px; width: auto; display: block; }
nav.main { display: flex; gap: 20px; align-items: center; flex-wrap: wrap; }
nav.main a { color: var(--muted); text-decoration: none; font-weight: 500; font-size: 15px; }
nav.main a:hover, nav.main a[aria-current='page'] { color: var(--primary); }
.lang { border: 1px solid var(--border); border-radius: 999px; padding: 4px 12px; }

.hero { background: var(--surface); border-bottom: 1px solid var(--border); }
.hero .wrap { display: grid; grid-template-columns: 1.1fr 0.9fr; gap: 48px; align-items: center; padding-top: 64px; padding-bottom: 64px; }
.hero h1 { font-size: 44px; line-height: 1.15; margin: 0 0 16px; letter-spacing: -0.5px; }
.hero p.lead { font-size: 19px; color: var(--muted); margin: 0 0 28px; }
.hero .shot { justify-self: center; max-width: 320px; width: 100%; }
.hero .shot img { width: 100%; height: auto; display: block; border-radius: 28px; border: 1px solid var(--border); box-shadow: 0 24px 48px -24px rgba(29, 38, 48, 0.35); }
.btn { display: inline-flex; align-items: center; gap: 8px; padding: 12px 20px; border-radius: 8px; font-weight: 700; text-decoration: none; }
.btn.primary { background: var(--primary); color: #fff; }
.btn.ghost { color: var(--primary-dark); background: var(--primary-light); }
.actions { display: flex; gap: 12px; flex-wrap: wrap; }
.note { font-size: 14px; color: var(--muted); margin-top: 16px; }

section.features { padding: 64px 0; }
section.features h2, section.apps h2 { font-size: 30px; margin: 0 0 8px; }
.grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; margin-top: 28px; }
.card { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 22px; }
.card h3 { margin: 0 0 6px; font-size: 18px; }
.card p { margin: 0; color: var(--muted); font-size: 15px; }
.icon { width: 40px; height: 40px; border-radius: 10px; background: var(--primary-light); color: var(--primary-dark); display: grid; place-items: center; font-weight: 800; margin-bottom: 12px; }
section.apps { padding: 0 0 64px; }
section.apps .card { display: flex; justify-content: space-between; align-items: center; gap: 24px; flex-wrap: wrap; }

main.doc { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); margin: 40px auto; padding: 40px 48px; max-width: 860px; }
main.doc h1 { font-size: 32px; margin: 0 0 4px; }
main.doc .updated { color: var(--muted); margin: 0 0 28px; font-size: 14px; }
main.doc h2 { font-size: 21px; margin: 32px 0 8px; }
main.doc h3 { font-size: 17px; margin: 20px 0 6px; }
main.doc li { margin: 4px 0; }
main.doc table { border-collapse: collapse; width: 100%; font-size: 15px; margin: 12px 0; }
main.doc th, main.doc td { border: 1px solid var(--border); padding: 8px 10px; text-align: left; vertical-align: top; }
main.doc th { background: var(--bg); }
.callout { background: var(--primary-light); border-radius: 10px; padding: 16px 18px; margin: 20px 0; }
.callout p { margin: 0; }

footer.bottom { border-top: 1px solid var(--border); background: var(--surface); padding: 28px 0; color: var(--muted); font-size: 14px; }
footer.bottom .wrap { display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap; }
footer.bottom a { color: var(--muted); margin-right: 16px; }

@media (max-width: 820px) {
  .hero .wrap { grid-template-columns: 1fr; padding-top: 40px; padding-bottom: 40px; }
  .hero h1 { font-size: 34px; }
  .grid { grid-template-columns: 1fr; }
  main.doc { padding: 28px 22px; margin: 20px 12px; }
  nav.main { gap: 12px; }
  nav.main a.hide-sm { display: none; }
}