:root {
  --bg: #f6f6f3;
  --surface: #ffffff;
  --text: #1c1c1e;
  --muted: #5f6368;
  --line: #e3e3de;
  --accent: #1f7a4d;
  --accent-soft: #e4f2ea;
  --radius: 18px;
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #111213;
    --surface: #1b1c1e;
    --text: #f2f2f0;
    --muted: #a3a6aa;
    --line: #2c2e31;
    --accent: #5fd197;
    --accent-soft: #1d2e25;
    color-scheme: dark;
  }
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 17px/1.6 -apple-system, BlinkMacSystemFont, "SF Pro Text", "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}
a { color: var(--accent); text-underline-offset: 3px; }
img { max-width: 100%; display: block; }
.wrap { max-width: 920px; margin: 0 auto; padding: 0 20px; }

/* Header and footer */
.site-header { border-bottom: 1px solid var(--line); background: var(--surface); }
.site-header .wrap { display: flex; align-items: center; justify-content: space-between; gap: 16px; min-height: 64px; }
.brand { font-weight: 700; font-size: 18px; letter-spacing: -0.01em; color: var(--text); text-decoration: none; }
.site-header nav a { color: var(--muted); text-decoration: none; font-size: 15px; }
.site-header nav a:hover { color: var(--text); }
.site-footer { border-top: 1px solid var(--line); margin-top: 72px; padding: 28px 0 40px; color: var(--muted); font-size: 14px; }
.site-footer .wrap { display: flex; flex-wrap: wrap; gap: 8px 24px; justify-content: space-between; }
.site-footer a { color: var(--muted); }

/* Home */
.hero { padding: 64px 0 28px; }
.hero h1 { font-size: clamp(34px, 6vw, 52px); line-height: 1.1; letter-spacing: -0.03em; margin: 0 0 14px; }
.hero p { font-size: 19px; color: var(--muted); margin: 0; max-width: 40em; }
.grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(260px, 1fr)); gap: 18px; margin-top: 28px; }
.card {
  display: flex; flex-direction: column; gap: 12px;
  background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 22px; color: var(--text); text-decoration: none;
  transition: transform .15s ease, border-color .15s ease;
}
.card:hover { transform: translateY(-2px); border-color: var(--accent); }
.card .icon { width: 72px; height: 72px; }
.card h2 { font-size: 20px; margin: 4px 0 0; letter-spacing: -0.01em; }
.card p { margin: 0; color: var(--muted); font-size: 15.5px; }
.card .platform { margin-top: auto; font-size: 13.5px; color: var(--muted); }

.icon { border-radius: 22%; box-shadow: 0 1px 2px rgba(0,0,0,.12); }
.badge {
  display: inline-block; font-size: 13.5px; font-weight: 600;
  color: var(--accent); background: var(--accent-soft);
  padding: 5px 12px; border-radius: 999px;
}

/* App page */
.app-head { display: flex; gap: 24px; align-items: center; padding: 56px 0 8px; }
.app-head .icon { width: 112px; height: 112px; flex: none; }
.app-head h1 { font-size: clamp(30px, 5vw, 42px); line-height: 1.1; letter-spacing: -0.025em; margin: 0 0 8px; }
.app-head p { margin: 0 0 12px; color: var(--muted); font-size: 18px; }
.links { display: flex; flex-wrap: wrap; gap: 10px 18px; margin: 28px 0 8px; font-size: 15.5px; }
.shot { margin: 28px 0; border-radius: var(--radius); overflow: hidden; border: 1px solid var(--line); }
.features { list-style: none; padding: 0; margin: 8px 0 0; display: grid; gap: 12px; }
.features li { background: var(--surface); border: 1px solid var(--line); border-radius: 14px; padding: 14px 18px; }
.features b { display: block; }

/* Text pages */
.doc { max-width: 720px; padding-top: 48px; }
.doc h1 { font-size: clamp(30px, 5vw, 40px); line-height: 1.15; letter-spacing: -0.025em; margin: 0 0 6px; }
.doc .sub { color: var(--muted); margin: 0 0 28px; }
.doc h2 { font-size: 21px; margin: 36px 0 8px; letter-spacing: -0.01em; }
.doc ul { padding-left: 22px; }
.doc li { margin: 4px 0; }
.summary { background: var(--accent-soft); border-radius: 14px; padding: 16px 20px; margin: 0 0 8px; }
.crumb { font-size: 15px; margin: 0 0 18px; }
.crumb a { text-decoration: none; }
.contact { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 22px; margin: 8px 0 0; }
.contact p { margin: 0 0 6px; }
details { background: var(--surface); border: 1px solid var(--line); border-radius: 14px; padding: 14px 18px; margin: 10px 0; }
summary { cursor: pointer; font-weight: 600; }
details p { margin: 10px 0 2px; }

@media (max-width: 560px) {
  .app-head { flex-direction: column; align-items: flex-start; gap: 16px; padding-top: 36px; }
  .app-head .icon { width: 92px; height: 92px; }
  .hero { padding-top: 44px; }
}