:root {
  --bg: #fbfbfd;
  --surface: #ffffff;
  --text: #1d1d1f;
  --muted: #6e6e73;
  --line: rgba(0, 0, 0, 0.08);
  --accent: #e63935;
  --radius: 22px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #000000;
    --surface: #1c1c1e;
    --text: #f5f5f7;
    --muted: #a1a1a6;
    --line: rgba(255, 255, 255, 0.1);
    --accent: #ff5752;
  }
}

* { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 17px/1.55 -apple-system, BlinkMacSystemFont, "SF Pro Text", "Helvetica Neue", Helvetica, Arial, sans-serif;
  -webkit-font-smoothing: antialiased;
}

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

.wrap { max-width: 760px; margin: 0 auto; padding: 0 20px; }

header.site {
  border-bottom: 1px solid var(--line);
  position: sticky; top: 0;
  background: color-mix(in srgb, var(--bg) 80%, transparent);
  backdrop-filter: saturate(180%) blur(20px);
  -webkit-backdrop-filter: saturate(180%) blur(20px);
  z-index: 1;
}
header.site .wrap { display: flex; align-items: center; justify-content: space-between; height: 52px; }
header.site .brand { color: var(--text); font-weight: 600; letter-spacing: -0.01em; }
header.site nav a { color: var(--muted); font-size: 15px; margin-left: 20px; }

main { padding: 56px 0 80px; }

h1 { font-size: clamp(34px, 6vw, 48px); line-height: 1.08; letter-spacing: -0.025em; margin: 0 0 12px; }
h2 { font-size: 24px; letter-spacing: -0.015em; margin: 44px 0 10px; }
h3 { font-size: 18px; margin: 28px 0 6px; }
p, li { color: var(--text); }
.lead { font-size: 21px; color: var(--muted); margin: 0 0 32px; }
.muted { color: var(--muted); }
.small { font-size: 14px; }

.card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 24px;
  display: flex; gap: 20px; align-items: center;
  color: inherit;
}
a.card:hover { text-decoration: none; transform: translateY(-1px); }
a.card { transition: transform 0.15s ease; }
.card img { width: 84px; height: 84px; border-radius: 19px; flex: none; box-shadow: 0 4px 14px rgba(0, 0, 0, 0.15); }
.card h3 { margin: 0 0 4px; }
.card p { margin: 0; color: var(--muted); }

.app-head { display: flex; gap: 22px; align-items: center; margin-bottom: 28px; }
.app-head img { width: 112px; height: 112px; border-radius: 25px; box-shadow: 0 6px 20px rgba(0, 0, 0, 0.18); }
.app-head h1 { margin: 0; }
.app-head p { margin: 4px 0 0; color: var(--muted); font-size: 19px; }

.pill {
  display: inline-block; padding: 10px 20px; border-radius: 999px;
  background: var(--accent); color: #fff; font-weight: 600; font-size: 15px;
}
.pill.ghost { background: transparent; color: var(--accent); border: 1px solid var(--accent); }
.pills { display: flex; flex-wrap: wrap; gap: 10px; margin: 8px 0 8px; }

ul.features { padding-left: 1.1em; }
ul.features li { margin: 6px 0; }

footer.site { border-top: 1px solid var(--line); padding: 28px 0 48px; font-size: 13px; color: var(--muted); }
footer.site p { color: var(--muted); margin: 6px 0; }

@media (max-width: 520px) {
  .app-head { flex-direction: column; align-items: flex-start; }
  header.site nav a { margin-left: 14px; }
}