:root{
  --ink:#203236;
  --muted:#5c7074;
  --brand:#007a73;
  --brand-soft:#e8f5f4;
  --bg:#f5fafa;
  --card:#fff;
  --line:#d9e8e8;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  font-family:"Hiragino Sans","Hiragino Kaku Gothic ProN","Yu Gothic Medium","Yu Gothic",Meiryo,sans-serif;
  color:var(--ink);
  background:var(--bg);
  line-height:1.8;
  -webkit-font-smoothing:antialiased;
}
a{color:var(--brand)}
header{
  background:var(--card);
  border-bottom:1px solid var(--line);
}
.header-inner{
  width:min(960px,calc(100% - 32px));
  margin:auto;
  min-height:72px;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:20px;
}
.logo{display:block;width:160px;height:auto}
.back{font-size:14px;font-weight:700;text-decoration:none}
main{
  width:min(880px,calc(100% - 32px));
  margin:44px auto 72px;
}
.eyebrow{
  color:var(--brand);
  font-size:12px;
  font-weight:800;
  letter-spacing:.12em;
  text-transform:uppercase;
}
h1{font-size:clamp(26px,5vw,40px);line-height:1.35;margin:8px 0 16px}
.lead{color:var(--muted);margin:0 0 30px}
.card{
  background:var(--card);
  border:1px solid var(--line);
  border-radius:18px;
  padding:clamp(20px,5vw,38px);
  box-shadow:0 10px 30px rgba(32,50,54,.05);
}
h2{
  font-size:20px;
  margin:34px 0 10px;
  padding-left:12px;
  border-left:4px solid var(--brand);
  line-height:1.5;
}
h2:first-child{margin-top:0}
h3{font-size:16px;margin:24px 0 6px}
p{margin:8px 0}
ul,ol{padding-left:1.4em;margin:8px 0}
table{width:100%;border-collapse:collapse;font-size:14px}
th,td{padding:14px 12px;border-bottom:1px solid var(--line);vertical-align:top;text-align:left}
th{width:28%;background:var(--brand-soft);font-weight:800}
.note{
  margin-top:28px;
  padding:16px 18px;
  background:var(--brand-soft);
  border-radius:12px;
  color:var(--muted);
  font-size:13px;
}
.updated{margin-top:32px;color:var(--muted);font-size:13px;text-align:right}
footer{
  padding:28px 16px;
  text-align:center;
  border-top:1px solid var(--line);
  background:var(--card);
  color:var(--muted);
  font-size:12px;
}
footer p{margin:5px 0}
@media(max-width:640px){
  .header-inner{min-height:62px}
  .logo{width:125px}
  main{margin-top:28px}
  .card{padding:20px 16px;border-radius:14px}
  table,tbody,tr,th,td{display:block}
  tr{border-bottom:1px solid var(--line);padding:10px 0}
  th,td{width:100%;border:0;padding:4px 8px}
  th{background:transparent;color:var(--brand);font-size:12px}
}