:root { --bg: #f7f5f0; --ink: #1c1b19; --muted: #5d5a53; --line: #dedad0; --link: #1c1b19; --accent: #c1362b; }
@media (prefers-color-scheme: dark) {
  :root { --bg: #151413; --ink: #f3f1eb; --muted: #aaa69c; --line: #34322e; --link: #f3f1eb; }
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body { margin: 0; background: var(--bg); color: var(--ink); font: 16px/1.6 -apple-system, BlinkMacSystemFont, "Segoe UI", Inter, Roboto, Helvetica, Arial, sans-serif; }
.top, main, footer { max-width: 720px; margin: 0 auto; padding: 0 20px; }
.top { padding-top: 28px; }
.brand { display: inline-flex; align-items: center; gap: 10px; color: var(--ink); text-decoration: none; font-weight: 600; }
.mark { width: 26px; height: 26px; }
main { padding-top: 24px; padding-bottom: 40px; }
h1 { font-size: 32px; line-height: 1.2; margin: 16px 0 4px; letter-spacing: -0.01em; }
h2 { font-size: 19px; margin: 32px 0 8px; }
.meta { color: var(--muted); margin-top: 0; font-size: 14px; }
p, li { color: var(--ink); }
ul { padding-left: 20px; }
li { margin: 6px 0; }
a { color: var(--link); text-decoration-color: var(--accent); text-underline-offset: 3px; }
footer { border-top: 1px solid var(--line); padding-top: 16px; padding-bottom: 40px; color: var(--muted); font-size: 14px; }
footer a { color: var(--muted); }
/* the unsubscribe page's one button (app/unsubscribe/) */
.btn { font: inherit; font-weight: 600; background: var(--ink); color: var(--bg); border: 0; border-radius: 8px; padding: 11px 18px; cursor: pointer; }
.btn:disabled { opacity: .5; cursor: default; }