:root {
  color-scheme: light;
  --bg: #ffffff;
  --text: #111111;
  --muted: #666666;
  --line: #e8e8e8;
  --accent: #e53935;
  --max: 820px;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.65;
}
header {
  border-bottom: 1px solid var(--line);
  background: rgba(255,255,255,.96);
}
.nav {
  max-width: 1100px;
  margin: 0 auto;
  padding: 18px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}
.brand {
  color: var(--text);
  text-decoration: none;
  font-family: ui-rounded, "SF Pro Rounded", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-weight: 900;
  font-size: 24px;
  letter-spacing: -0.03em;
}
nav a {
  color: var(--muted);
  text-decoration: none;
  margin-left: 22px;
  font-size: 15px;
}
nav a:hover { color: var(--text); }
main {
  max-width: var(--max);
  margin: 0 auto;
  padding: 64px 24px 84px;
}
.hero {
  max-width: 720px;
  padding: 72px 0 80px;
}
h1 {
  font-size: clamp(38px, 6vw, 64px);
  line-height: 1.05;
  letter-spacing: -0.04em;
  margin: 0 0 22px;
}
h2 {
  font-size: 24px;
  line-height: 1.25;
  margin: 46px 0 14px;
  letter-spacing: -0.02em;
}
h3 {
  font-size: 18px;
  margin: 28px 0 8px;
}
p { margin: 0 0 16px; }
.lead {
  font-size: 21px;
  color: var(--muted);
  max-width: 650px;
}
.meta {
  color: var(--muted);
  margin-bottom: 36px;
}
a { color: var(--accent); }
.card {
  border: 1px solid var(--line);
  border-radius: 18px;
  padding: 28px;
  margin-top: 28px;
}
.button {
  display: inline-block;
  background: var(--accent);
  color: white;
  text-decoration: none;
  padding: 13px 20px;
  border-radius: 999px;
  font-weight: 700;
  margin-top: 12px;
}
.hero .button { background: #ff3b30; }
ul, ol { padding-left: 22px; }
li { margin: 6px 0; }
footer {
  border-top: 1px solid var(--line);
  color: var(--muted);
}
.footer-inner {
  max-width: 1100px;
  margin: 0 auto;
  padding: 26px 24px;
  display: flex;
  justify-content: space-between;
  gap: 20px;
  flex-wrap: wrap;
  font-size: 14px;
}
.footer-inner a {
  color: var(--muted);
  text-decoration: none;
  margin-left: 18px;
}
@media (max-width: 640px) {
  .nav { align-items: flex-start; }
  nav { display: flex; flex-direction: column; gap: 6px; }
  nav a { margin-left: 0; }
  main { padding-top: 42px; }
  .hero { padding-top: 42px; }
}