:root {
  --bg: #eef3ef;
  --surface: #ffffff;
  --text: #16211d;
  --muted: #566058;
  --primary: #1f6f66;
  --border: #dce4dd;
  --maxw: 720px;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0f1613;
    --surface: #161f1b;
    --text: #eaf1ec;
    --muted: #9fb0a6;
    --primary: #6fd0c2;
    --border: #263230;
  }
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  line-height: 1.65;
  font-size: 17px;
}

header.site {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 22px clamp(18px, 5vw, 40px);
  border-bottom: 1px solid var(--border);
}
header.site .mark {
  width: 32px; height: 32px; border-radius: 8px;
  display: inline-block; object-fit: cover;
}
header.site .name { font-weight: 700; font-size: 18px; letter-spacing: -0.2px; }

main {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: clamp(24px, 5vw, 56px) clamp(18px, 5vw, 40px) 80px;
}

h1 { font-size: clamp(28px, 6vw, 38px); line-height: 1.2; letter-spacing: -0.5px; margin: 0 0 6px; }
.effective { color: var(--muted); font-size: 15px; margin: 0 0 32px; }
h2 { font-size: 21px; letter-spacing: -0.2px; margin: 40px 0 10px; }
h3 { font-size: 17px; margin: 22px 0 6px; }
p, li { color: var(--text); }
.lead { font-size: 18px; color: var(--muted); }
a { color: var(--primary); }
ul { padding-left: 22px; }
li { margin: 6px 0; }

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 18px 20px;
  margin: 20px 0;
}

.home-links { display: grid; gap: 14px; margin-top: 28px; }
.home-links a {
  display: block;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 20px 22px;
  text-decoration: none;
  color: var(--text);
  font-weight: 600;
}
.home-links a span { display: block; color: var(--muted); font-weight: 400; font-size: 15px; margin-top: 2px; }

footer.site {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 24px clamp(18px, 5vw, 40px) 60px;
  color: var(--muted);
  font-size: 14px;
  border-top: 1px solid var(--border);
}
footer.site a { color: var(--muted); }
.disclaimer { font-size: 14px; color: var(--muted); font-style: italic; margin-top: 36px; }