:root {
  --bg: #ffffff;
  --text: #1a1a1a;
  --muted: #5c5c5c;
  --accent: #1f4fd1;
  --accent-text: #ffffff;
  --line: #e2e2e2;
  --notice: #f3f6fd;
  --error: #b00020;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #121212;
    --text: #ececec;
    --muted: #a8a8a8;
    --accent: #8fb0ff;
    --accent-text: #0b0b0b;
    --line: #333333;
    --notice: #1c2233;
    --error: #ff8a8a;
  }
}
* { box-sizing: border-box; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 17px/1.6 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}
main, .site-header, .site-footer { max-width: 680px; margin: 0 auto; padding: 0 16px; }
a { color: var(--accent); }
.site-header { padding-top: 24px; }
.brand { font-weight: 700; font-size: 1.1rem; text-decoration: none; color: var(--text); }
.hero { padding: 40px 0 16px; }
h1 { font-size: 2rem; line-height: 1.2; margin: 0 0 16px; }
h2 { font-size: 1.2rem; margin-top: 32px; }
.lead { font-size: 1.15rem; }
.bullets li { margin-bottom: 6px; }
.signup { border-top: 1px solid var(--line); padding: 24px 0; }
.notice { background: var(--notice); padding: 12px 16px; border-radius: 8px; }
.error { color: var(--error); font-weight: 600; }
form { display: grid; gap: 12px; }
input[type="email"] {
  width: 100%; padding: 12px; font-size: 1rem;
  border: 1px solid var(--line); border-radius: 6px; background: var(--bg); color: var(--text);
}
.consent { display: flex; gap: 8px; align-items: flex-start; }
.consent input { margin-top: 6px; }
button {
  padding: 12px 18px; font-size: 1rem; font-weight: 600; cursor: pointer;
  border: 0; border-radius: 6px; background: var(--accent); color: var(--accent-text);
}
.hp { position: absolute; left: -10000px; width: 1px; height: 1px; overflow: hidden; }
.small { font-size: 0.9rem; color: var(--muted); }
.prose { padding: 32px 0; overflow-wrap: anywhere; }
.site-footer { border-top: 1px solid var(--line); margin-top: 48px; padding-top: 16px; padding-bottom: 32px; color: var(--muted); font-size: 0.9rem; }
.site-footer nav { display: flex; gap: 16px; flex-wrap: wrap; }