:root {
  color-scheme: light;
  --ink: #20242a;
  --muted: #606a76;
  --line: #d7dde2;
  --paper: #f7f8f6;
  --panel: #ffffff;
  --accent: #2f6f73;
  --accent-2: #8d4f36;
  --soft: #edf3f2;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Hiragino Sans", "Yu Gothic", "YuGothic", "Meiryo", sans-serif;
  color: var(--ink);
  background: var(--paper);
  line-height: 1.8;
  letter-spacing: 0;
}
a { color: inherit; }
.wrap { width: min(1120px, calc(100% - 40px)); margin: 0 auto; }
.site-header {
  background: rgba(255, 255, 255, .96);
  border-bottom: 1px solid var(--line);
  position: sticky;
  top: 0;
  z-index: 5;
}
.header-inner {
  min-height: 68px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 22px;
}
.brand {
  font-weight: 700;
  text-decoration: none;
  white-space: nowrap;
  color: var(--accent);
  flex: 0 0 auto;
}
nav {
  display: flex;
  flex: 1 1 720px;
  min-width: 0;
  gap: 4px 14px;
  flex-wrap: wrap;
  justify-content: flex-end;
  font-size: 14px;
}
nav a {
  text-decoration: none;
  color: var(--muted);
  white-space: nowrap;
}
nav a:hover { color: var(--accent); }
.hero {
  background:
    linear-gradient(120deg, rgba(47, 111, 115, .92), rgba(141, 79, 54, .88)),
    url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='1200' height='500' viewBox='0 0 1200 500'%3E%3Cpath d='M0 390 C180 320 240 430 410 360 C580 290 650 170 820 220 C980 265 1040 140 1200 110 L1200 500 L0 500 Z' fill='%23ffffff' fill-opacity='.12'/%3E%3Cpath d='M0 95 C175 140 260 30 420 80 C610 138 700 70 870 110 C1030 148 1080 235 1200 210 L1200 0 L0 0 Z' fill='%23ffffff' fill-opacity='.10'/%3E%3C/svg%3E");
  background-size: cover;
  color: #fff;
}
.hero-inner {
  padding: 74px 0 84px;
}
.eyebrow {
  margin: 0 0 12px;
  font-size: 14px;
  font-weight: 700;
}
h1 {
  margin: 0;
  font-size: clamp(32px, 5vw, 54px);
  line-height: 1.25;
  font-weight: 800;
}
.lead {
  max-width: 780px;
  margin: 22px 0 0;
  font-size: 18px;
}
.content-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 340px;
  gap: 32px;
  padding: 42px 0 64px;
}
.main-copy section,
.side-box {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 8px;
}
.main-copy section {
  padding: 28px;
  margin: 0 0 18px;
}
h2 {
  margin: 0 0 12px;
  font-size: 22px;
  line-height: 1.45;
}
p { margin: 0; }
.side-box {
  align-self: start;
  position: sticky;
  top: 88px;
  padding: 22px;
}
.side-box h2 {
  font-size: 18px;
}
.card-list {
  display: grid;
  gap: 10px;
}
.card {
  display: block;
  text-decoration: none;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 14px;
  background: var(--soft);
}
.card strong {
  display: block;
  color: var(--accent);
  line-height: 1.45;
}
.card span {
  display: block;
  margin-top: 6px;
  color: var(--muted);
  font-size: 13px;
  line-height: 1.65;
}
details {
  border-top: 1px solid var(--line);
  padding: 14px 0;
}
summary {
  cursor: pointer;
  font-weight: 700;
}
details p {
  margin-top: 8px;
  color: var(--muted);
}
.site-footer {
  background: #20242a;
  color: #fff;
}
.footer-inner {
  min-height: 86px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}
.footer-inner a { color: #fff; }
@media (max-width: 820px) {
  .wrap { width: min(100% - 28px, 1120px); }
  .header-inner { align-items: flex-start; flex-direction: column; padding: 14px 0; }
  nav { flex-basis: auto; width: 100%; justify-content: flex-start; }
  .hero-inner { padding: 48px 0 56px; }
  .lead { font-size: 16px; }
  .content-grid { grid-template-columns: 1fr; padding: 28px 0 44px; }
  .main-copy section, .side-box { padding: 20px; }
  .side-box { position: static; }
  .footer-inner { align-items: flex-start; flex-direction: column; justify-content: center; padding: 20px 0; }
}