:root {
  --bg: #ffffff; --fg: #14171a; --muted: #5b6570; --line: #e2e6ea;
  --accent: #1a7f37; --accent-dark: #14652c; --chip: #f7f9fa;
}
@media (prefers-color-scheme: dark) {
  :root { --bg:#17191c; --fg:#e9edf1; --muted:#9aa4ae; --line:#2c3036;
          --accent:#3fb950; --accent-dark:#2ea043; --chip:#1e2126; }
}
* { box-sizing: border-box; }
body {
  margin: 0; background: var(--bg); color: var(--fg);
  font: 16px/1.65 -apple-system, BlinkMacSystemFont, "Segoe UI", system-ui, sans-serif;
}
.wrap { max-width: 760px; margin: 0 auto; padding: 0 22px; }

header.site {
  border-bottom: 1px solid var(--line);
  padding: 16px 0;
  position: sticky; top: 0; background: var(--bg); z-index: 10;
}
header.site .wrap { display: flex; align-items: center; justify-content: space-between; gap: 16px; }
.brand { display: flex; align-items: center; gap: 9px; font-weight: 700; letter-spacing: -0.01em;
         color: var(--fg); text-decoration: none; }
.dot { width: 11px; height: 11px; border-radius: 50%; background: var(--accent);
       box-shadow: 0 0 0 4px color-mix(in srgb, var(--accent) 20%, transparent); }
nav a { color: var(--muted); text-decoration: none; font-size: 14px; margin-left: 16px; }
nav a:hover { color: var(--fg); }

h1 { font-size: 34px; line-height: 1.2; letter-spacing: -0.025em; margin: 0 0 12px; }
h2 { font-size: 20px; letter-spacing: -0.015em; margin: 34px 0 10px; }
h3 { font-size: 16px; margin: 22px 0 6px; }
p { margin: 0 0 14px; }
.lede { font-size: 18px; color: var(--muted); margin-bottom: 28px; }
a { color: var(--accent); }

main { padding: 44px 0 60px; }

.card { border: 1px solid var(--line); border-radius: 16px; padding: 28px; margin: 26px 0; }
.price { display: flex; align-items: baseline; gap: 7px; margin-bottom: 20px; }
.price b { font-size: 44px; letter-spacing: -0.03em; }
.price span { color: var(--muted); font-size: 15px; }
ul.ticks { list-style: none; padding: 0; margin: 0 0 26px; }
ul.ticks li { display: flex; gap: 10px; padding: 6px 0; font-size: 15px; }
ul.ticks li::before { content: "✓"; color: var(--accent); font-weight: 700; }

button.buy {
  width: 100%; padding: 15px; border: 0; border-radius: 10px; background: var(--accent);
  color: #fff; font: inherit; font-weight: 600; font-size: 16px; cursor: pointer;
}
button.buy:hover { background: var(--accent-dark); }
button.buy:disabled { opacity: .55; cursor: default; }
.note { font-size: 13px; color: var(--muted); text-align: center; margin-top: 13px; }

.legal { font-size: 15px; }
.legal h2 { font-size: 18px; }
.legal ul { padding-left: 20px; }
.legal li { margin-bottom: 6px; }
.updated { color: var(--muted); font-size: 14px; margin-bottom: 30px; }
.callout { background: var(--chip); border: 1px solid var(--line); border-radius: 10px;
           padding: 14px 16px; font-size: 14.5px; color: var(--muted); margin: 20px 0; }

footer.site { border-top: 1px solid var(--line); padding: 26px 0 44px; color: var(--muted); font-size: 14px; }
footer.site a { color: var(--muted); text-decoration: none; margin-right: 16px; }
footer.site a:hover { color: var(--fg); text-decoration: underline; }
footer.site .mor { margin-top: 12px; font-size: 13px; }