:root {
  --ground: #f4f6f5;
  --paper: #ffffff;
  --ink: #1c2a28;
  --ink-soft: #556762;
  --line: #d9e0dd;
  --accent: #1f6f5e;
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root {
    --ground: #131a19;
    --paper: #1b2423;
    --ink: #e6ebe9;
    --ink-soft: #9fb0aa;
    --line: #2e3b38;
    --accent: #5fb89f;
    color-scheme: dark;
  }
}
* { box-sizing: border-box; }
body {
  margin: 0;
  background: var(--ground);
  color: var(--ink);
  font-family: "Hiragino Sans", "Noto Sans JP", system-ui, sans-serif;
  font-size: 15px;
  line-height: 1.8;
  padding: 32px 16px 64px;
}
main {
  max-width: 760px;
  margin: 0 auto;
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 28px clamp(18px, 4vw, 40px) 40px;
}
.eyebrow { margin: 0; font-size: 12px; font-weight: 700; letter-spacing: 0.12em; color: var(--accent); }
h1 { margin: 4px 0 8px; font-size: clamp(22px, 5vw, 28px); line-height: 1.4; }
h2 { margin: 32px 0 8px; font-size: 18px; border-bottom: 1px solid var(--line); padding-bottom: 4px; }
h3 { margin: 20px 0 4px; font-size: 15px; }
.meta, .lead { color: var(--ink-soft); }
a { color: var(--accent); }
table { width: 100%; border-collapse: collapse; margin: 8px 0; font-size: 14px; display: block; overflow-x: auto; }
th, td { border: 1px solid var(--line); padding: 8px 10px; text-align: left; vertical-align: top; }
th { background: color-mix(in srgb, var(--accent) 10%, transparent); white-space: nowrap; }
.contact { background: color-mix(in srgb, var(--accent) 8%, transparent); border-radius: 8px; padding: 12px 16px; }
.links { margin-top: 32px; }