:root {
  --accent: #2563eb;
  --bg: #e8eefc;
  --card: #ffffff;
  --ink: #10141c;
  --muted: #5a6478;
  --line: rgba(16, 20, 28, .10);
  --radius: 18px;
}
@media (prefers-color-scheme: dark) {
  :root {
    --accent: #5b9bff;
    --bg: #0b0f18;
    --card: #171b26;
    --ink: #eef1f7;
    --muted: #9aa4b8;
    --line: rgba(255, 255, 255, .12);
  }
}

* { box-sizing: border-box; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font: 17px/1.6 -apple-system, BlinkMacSystemFont, "Segoe UI", system-ui, sans-serif;
  -webkit-font-smoothing: antialiased;
}
a { color: var(--accent); }

.nav {
  display: flex; align-items: center; justify-content: space-between;
  gap: 16px; flex-wrap: wrap;
  max-width: 980px; margin: 0 auto; padding: 18px 20px;
}
.brand {
  display: inline-flex; align-items: center; gap: 10px;
  font-weight: 700; font-size: 19px; color: var(--ink); text-decoration: none;
}
.brand img { border-radius: 7px; }
.nav nav a { margin-left: 18px; text-decoration: none; }
.nav nav a:hover { text-decoration: underline; }

.hero { max-width: 760px; margin: 0 auto; padding: 40px 20px 8px; text-align: center; }
.appicon { border-radius: 23px; box-shadow: 0 12px 30px rgba(0,0,0,.18); }
h1 { font-size: clamp(30px, 6vw, 46px); line-height: 1.15; letter-spacing: -.02em; margin: 22px 0 14px; }
.lede { font-size: clamp(17px, 2.4vw, 20px); color: var(--muted); margin: 0 auto 24px; max-width: 62ch; }

.cta {
  display: inline-block; background: var(--accent); color: #fff;
  text-decoration: none; font-weight: 600;
  padding: 13px 24px; border-radius: 999px;
}
.cta:hover { filter: brightness(1.07); }

.chips { display: flex; flex-wrap: wrap; gap: 8px; justify-content: center; margin: 26px 0 0; padding: 0; }
.chips span {
  font-size: 14px; color: var(--muted);
  border: 1px solid var(--line); border-radius: 999px; padding: 5px 13px;
}

.cards {
  display: grid; gap: 16px; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  max-width: 980px; margin: 44px auto 0; padding: 0 20px;
}
.cards article { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 22px 24px; min-width: 0; }
.cards h2 { font-size: 19px; margin: 0 0 8px; }
.cards p { margin: 0; color: var(--muted); }

.prose { max-width: 720px; margin: 0 auto; padding: 24px 20px 8px; }
.prose h1 { text-align: left; font-size: clamp(28px, 5vw, 38px); margin-bottom: 12px; }
.prose h2 { font-size: 21px; margin: 32px 0 6px; }
.prose h3 { font-size: 17px; margin: 24px 0 4px; }
.prose p, .prose li { color: var(--muted); }
.prose .lede { text-align: left; color: var(--ink); }
.prose .meta { font-size: 14px; }
.prose ul { padding-left: 22px; }
.prose li { margin: 6px 0; }

.foot {
  max-width: 980px; margin: 56px auto 0; padding: 22px 20px 40px;
  border-top: 1px solid var(--line);
  color: var(--muted); font-size: 15px;
}