:root {
  --blue: #1976d2;
  --blue-light: #4fc3f7;
  --ink: #10222f;
  --muted: #5b7183;
  --bg: #f6fafd;
  --card: #ffffff;
}
* { box-sizing: border-box; margin: 0; }
body {
  font: 17px/1.65 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  color: var(--ink);
  background: linear-gradient(180deg, #eaf6ff 0%, var(--bg) 320px);
}
.wrap { max-width: 760px; margin: 0 auto; padding: 48px 24px 40px; }
.hero { text-align: center; padding-top: 24px; }
.appicon { border-radius: 27%; box-shadow: 0 10px 30px rgba(25, 118, 210, .25); }
.hero h1 { font-size: 44px; letter-spacing: -.5px; margin-top: 18px; }
.tagline { font-size: 21px; color: var(--muted); margin-top: 6px; }
.cta { margin-top: 22px; }
.cta a { display: inline-block; line-height: 0; }
.cta img { width: 180px; height: auto; max-width: 60vw; }
.shot { text-align: center; margin: 44px 0 8px; }
.shot img {
  max-width: min(310px, 78vw); height: auto; border-radius: 34px;
  box-shadow: 0 18px 50px rgba(16, 34, 47, .18); border: 1px solid #dbe8f2;
}
.features {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 18px; margin-top: 44px;
}
.f { background: var(--card); border: 1px solid #e3edf5; border-radius: 16px; padding: 22px; }
.f h3 { font-size: 19px; margin-bottom: 8px; }
.f p { color: var(--muted); font-size: 15.5px; }
footer { margin-top: 52px; text-align: center; }
footer nav { display: flex; gap: 10px; justify-content: center; color: var(--muted); }
footer a { color: var(--blue); text-decoration: none; }
footer a:hover { text-decoration: underline; }
.fine { color: var(--muted); font-size: 13.5px; margin-top: 12px; }
.doc h2 { margin: 30px 0 8px; font-size: 22px; }
.doc p { margin-bottom: 10px; }
.doc a { color: var(--blue); }
.dochead { border-bottom: 1px solid #e3edf5; padding-bottom: 18px; margin-bottom: 6px; }
.dochead h1 { font-size: 34px; margin-top: 14px; }
.home {
  display: inline-flex; align-items: center; gap: 8px;
  color: var(--ink); text-decoration: none; font-weight: 600;
}
.home img { border-radius: 8px; }