:root {
  color-scheme: light dark;
  --brand: #5b8cff;
  --brand-strong: #2f62e6;
  --bg: #ffffff;
  --surface: #f4f6fb;
  --text: #141821;
  --muted: #555e70;
  --border: #e1e5ee;
}
@media (prefers-color-scheme: dark) {
  :root {
    --brand-strong: #8fb0ff;
    --bg: #0f1218;
    --surface: #181c25;
    --text: #eef1f7;
    --muted: #a3acbd;
    --border: #2a303c;
  }
}

* {
  box-sizing: border-box;
}
html {
  -webkit-text-size-adjust: 100%;
}
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 17px/1.6 system-ui, -apple-system, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
}
a {
  color: var(--brand-strong);
}
.wrap {
  max-width: 760px;
  margin: 0 auto;
  padding: 0 20px;
}

header.site {
  border-bottom: 1px solid var(--border);
}
header.site .wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  min-height: 64px;
}
.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--text);
  font-weight: 700;
  font-size: 19px;
  text-decoration: none;
}
.logo-mark {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: var(--brand);
  box-shadow: inset 0 0 0 5px color-mix(in srgb, var(--brand) 55%, white);
}
header.site nav {
  display: flex;
  gap: 18px;
  font-size: 15px;
}
header.site nav a {
  color: var(--muted);
  text-decoration: none;
}
header.site nav a:hover {
  color: var(--text);
}

.hero {
  padding: 64px 0 40px;
}
.hero h1 {
  margin: 0 0 16px;
  font-size: clamp(32px, 6vw, 46px);
  line-height: 1.15;
  letter-spacing: -0.02em;
}
.hero p.lead {
  margin: 0 0 28px;
  color: var(--muted);
  font-size: 19px;
}
.store {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 12px 20px;
  border-radius: 999px;
  background: var(--brand);
  color: #fff;
  font-weight: 600;
}
.store small {
  font-weight: 400;
  opacity: 0.85;
}

.features {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 14px;
  margin: 24px 0 48px;
  padding: 0;
  list-style: none;
}
.features li {
  padding: 18px;
  border: 1px solid var(--border);
  border-radius: 14px;
  background: var(--surface);
}
.features h3 {
  margin: 0 0 6px;
  font-size: 17px;
}
.features p {
  margin: 0;
  color: var(--muted);
  font-size: 15px;
}

section h2,
article h2 {
  margin: 40px 0 10px;
  font-size: 22px;
}
article h1 {
  margin: 48px 0 6px;
  font-size: 32px;
  letter-spacing: -0.01em;
}
article .date {
  margin: 0 0 24px;
  color: var(--muted);
}
article h3 {
  margin: 24px 0 6px;
  font-size: 18px;
}
article li {
  margin: 4px 0;
}
.note {
  padding: 14px 16px;
  border-left: 4px solid var(--brand);
  border-radius: 8px;
  background: var(--surface);
}

footer.site {
  margin-top: 64px;
  padding: 28px 0 40px;
  border-top: 1px solid var(--border);
  color: var(--muted);
  font-size: 15px;
}
footer.site .wrap {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 22px;
}
footer.site a {
  color: var(--muted);
}