:root {
  --ink: #102b2a;
  --muted: #5f706e;
  --green: #14574c;
  --mint: #dff3ee;
  --cream: #f7f3ea;
  --paper: #fffefa;
  --line: #d9e1dd;
  --accent: #f3a64a;
  color-scheme: light;
  font-family: "Noto Sans JP", "Yu Gothic UI", "Yu Gothic", sans-serif;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; background: var(--cream); color: var(--ink); line-height: 1.85; }
a { color: var(--green); }
.site-header { position: sticky; top: 0; z-index: 10; display: flex; align-items: center; justify-content: space-between; gap: 24px; padding: 14px max(24px, calc((100vw - 1160px) / 2)); background: rgba(255,254,250,.94); border-bottom: 1px solid var(--line); backdrop-filter: blur(12px); }
.brand { display: inline-flex; align-items: center; gap: 10px; color: var(--ink); font-family: Georgia, serif; font-size: 1.35rem; font-weight: 700; text-decoration: none; }
.brand img { width: 42px; height: 42px; border-radius: 12px; object-fit: cover; }
nav { display: flex; flex-wrap: wrap; gap: 20px; }
nav a, .footer-links a { text-decoration: none; font-weight: 700; }
.hero { max-width: 1160px; margin: 0 auto; min-height: 620px; display: grid; grid-template-columns: 1.35fr .65fr; align-items: center; gap: 64px; padding: 88px 24px; }
.eyebrow { margin: 0 0 12px; color: var(--green); font-size: .82rem; font-weight: 800; letter-spacing: .16em; }
h1 { margin: 0; font-size: clamp(2.5rem, 6vw, 5.2rem); line-height: 1.18; letter-spacing: -.04em; }
.lead { max-width: 720px; margin: 28px 0; color: #304d4a; font-size: 1.18rem; }
.hero-logo { width: min(100%, 360px); justify-self: center; border-radius: 28%; box-shadow: 0 24px 60px rgba(4,31,56,.22); }
.button { display: inline-block; padding: 13px 22px; border-radius: 999px; background: var(--green); color: white; font-weight: 800; text-decoration: none; }
.section { max-width: 1160px; margin: 0 auto; padding: 80px 24px; }
.section h2, .document h1 { margin: 0 0 28px; font-size: clamp(2rem, 4vw, 3.35rem); line-height: 1.3; }
.cards { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.cards article, .panel { background: var(--paper); border: 1px solid var(--line); border-radius: 24px; box-shadow: 0 10px 30px rgba(16,43,42,.05); }
.cards article { padding: 26px; }
.cards h3, .split h3 { margin: 0 0 8px; font-size: 1.18rem; }
.cards p, .split p { margin: 0; color: var(--muted); }
.panel { margin-top: 36px; padding: 60px; }
.split { display: grid; grid-template-columns: 1fr 1fr; gap: 36px; }
.note { margin: 34px 0 0; padding: 18px 22px; border-left: 4px solid var(--accent); background: #fff8e9; }
.compact { padding-top: 60px; padding-bottom: 100px; }
.compact p { max-width: 850px; font-size: 1.08rem; }
.document { max-width: 900px; margin: 0 auto; padding: 80px 24px 110px; }
.document h1 { font-size: clamp(2.2rem, 5vw, 4rem); }
.document h2 { margin: 48px 0 12px; padding-bottom: 8px; border-bottom: 1px solid var(--line); font-size: 1.45rem; }
.document p, .document li { color: #2e4745; }
.updated { color: var(--muted) !important; }
footer { display: grid; grid-template-columns: 1fr auto; gap: 24px; padding: 44px max(24px, calc((100vw - 1160px) / 2)); background: var(--ink); color: white; }
footer a { color: #dff3ee; }
.footer-links { display: flex; flex-wrap: wrap; gap: 20px; }
.copyright { grid-column: 1 / -1; margin: 16px 0 0; color: #aac0bd; font-size: .86rem; }
@media (max-width: 760px) {
  .site-header { align-items: flex-start; }
  nav { display: none; }
  .hero { min-height: auto; grid-template-columns: 1fr; padding-top: 56px; }
  .hero-logo { width: 180px; grid-row: 1; }
  .cards, .split { grid-template-columns: 1fr; }
  .panel { margin-inline: 14px; padding: 38px 24px; }
  footer { grid-template-columns: 1fr; }
}