:root {
  --bg: #f2f2f6;
  --surface: #ffffff;
  --text: #1c1c1e;
  --muted: #6c6c70;
  --hairline: #e5e5ea;
  --accent: #2c6de7;
  --accent-text: #ffffff;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #000000;
    --surface: #1c1c1e;
    --text: #f2f2f7;
    --muted: #a1a1a6;
    --hairline: #38383a;
    --accent: #5b8ff0;
  }
}

* { box-sizing: border-box; }

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

a { color: var(--accent); }

.wrap { max-width: 720px; margin: 0 auto; padding: 0 16px; }

header.site {
  padding: 20px 0;
}

header.site a {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--text);
  text-decoration: none;
  font-weight: 700;
  font-size: 20px;
}

header.site img { width: 36px; height: 36px; border-radius: 9px; }

.hero { text-align: center; padding: 40px 0 24px; }
.hero img { width: 128px; height: 128px; border-radius: 29px; box-shadow: 0 12px 32px rgba(20, 60, 160, 0.25); }
.hero h1 { font-size: 44px; line-height: 1.1; margin: 24px 0 8px; letter-spacing: -0.02em; }
.hero p { font-size: 21px; color: var(--muted); margin: 0; }

.card {
  background: var(--surface);
  border-radius: 24px;
  padding: 24px;
  margin: 16px 0;
}

.features { list-style: none; margin: 0; padding: 0; }
.features li { display: flex; gap: 14px; align-items: flex-start; padding: 12px 0; border-top: 1px solid var(--hairline); }
.features li:first-child { border-top: 0; padding-top: 0; }
.features li:last-child { padding-bottom: 0; }
.features .dot {
  flex: none;
  width: 12px;
  height: 12px;
  margin-top: 8px;
  border-radius: 50%;
  background: var(--accent);
}
.features strong { display: block; }
.features span { color: var(--muted); }

.button {
  display: inline-block;
  background: var(--accent);
  color: var(--accent-text);
  text-decoration: none;
  font-weight: 600;
  padding: 12px 22px;
  border-radius: 999px;
}

article h1 { font-size: 34px; line-height: 1.15; margin: 16px 0 4px; letter-spacing: -0.01em; }
article h2 { font-size: 21px; margin: 28px 0 8px; }
article p, article li { margin: 0 0 12px; }
article ul { padding-left: 22px; }
.updated { color: var(--muted); margin-bottom: 24px; }

footer.site {
  color: var(--muted);
  font-size: 15px;
  padding: 32px 0 48px;
  display: flex;
  flex-wrap: wrap;
  gap: 8px 20px;
}
footer.site a { color: var(--muted); }