:root {
  --ink: #161616;
  --sub: #5a5f6a;
  --line: #e7e5df;
  --bg: #faf9f6;
  --card: #ffffff;
  --accent: #f5c400;
  --accent2: #161616;
  --warn: #8a5a00;
}
* { box-sizing: border-box; }
body::before {
  content: "";
  display: block;
  height: 10px;
  background: repeating-linear-gradient(45deg, #f5c400 0 14px, #161616 14px 28px);
}
body {
  margin: 0;
  font-family: "Hiragino Kaku Gothic ProN", "Hiragino Sans", "Noto Sans JP", sans-serif;
  color: var(--ink);
  background: var(--bg);
  line-height: 1.8;
  font-size: 16px;
}
header.site {
  background: var(--card);
  border-bottom: 1px solid var(--line);
}
header.site .inner, main, footer.site .inner {
  max-width: 880px;
  margin: 0 auto;
  padding: 0 16px;
}
header.site .inner {
  padding-top: 14px;
  padding-bottom: 14px;
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  flex-wrap: wrap;
  gap: 8px;
}
.logo { font-weight: 900; font-size: 20px; color: var(--ink); text-decoration: none; }
nav { display: flex; flex-wrap: wrap; gap: 4px 8px; }
nav a {
  color: var(--ink);
  text-decoration: none;
  border-bottom: 2px solid var(--accent);
  text-underline-offset: 4px;
  font-size: 14px;
  font-weight: 700;
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  padding: 6px 10px 4px;
  border-radius: 0;
}
nav a:hover { color: var(--ink); background: #fff3a6; }
main { padding-top: 28px; padding-bottom: 40px; }
h1 { font-size: 28px; line-height: 1.5; font-weight: 900; margin: 0 0 12px; }
h2 { font-size: 20px; font-weight: 900; margin: 36px 0 12px; padding-left: 10px; border-left: 5px solid var(--accent); }
p { margin: 0 0 14px; }
a { color: #161616; text-decoration-color: #d6aa00; text-underline-offset: 3px; }
a:hover { text-decoration-thickness: 2px; }
.lead { color: var(--sub); font-size: 17px; }
.cards { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; margin: 20px 0; }
@media (max-width: 640px) { .cards { grid-template-columns: 1fr; } }
.card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 20px;
}
.card h3 { margin: 0 0 8px; font-size: 18px; font-weight: 900; }
.card p { color: var(--sub); font-size: 14px; }
.badge {
  display: inline-block;
  font-size: 12px;
  font-weight: 800;
  padding: 3px 10px;
  border-radius: 999px;
  background: #fff3a6;
  color: var(--ink);
  margin-bottom: 8px;
}
.badge.prep { background: #f2e6c7; color: #6d4b00; }
.btn {
  display: inline-block;
  background: var(--accent2);
  color: #fff;
  text-decoration: none;
  padding: 12px 24px;
  border-radius: 999px;
  font-weight: 900;
  margin-top: 8px;
}
.btn:hover { background: #333; color: #fff; }
.btn.sub { background: #fff; color: var(--ink); border: 1px solid var(--ink); }
.card.genba-unkan, .card.genba-otsu4 { position: relative; color: #fff; }
.card.genba-unkan { background: #1e5a3a; border-color: #1e5a3a; }
.card.genba-otsu4 { background: #161616; border-color: #161616; }
.card.genba-unkan h3, .card.genba-otsu4 h3 { color: #fff; margin-right: 62px; }
.qual { display: inline-block; font-size: 12px; font-weight: 800; letter-spacing: .04em; padding: 3px 9px; border-radius: 6px; margin-bottom: 10px; }
.genba-unkan .qual { background: rgba(255,255,255,.16); color: #dff3e4; }
.genba-otsu4 .qual { background: #f5c400; color: #161616; }
.bignum { font-size: 54px; font-weight: 900; line-height: 1.05; margin: 2px 0 10px; }
.bignum small { font-size: 20px; font-weight: 700; margin-left: 2px; }
.genba-otsu4 .bignum { color: #f5c400; }
.tags { display: flex; flex-wrap: wrap; gap: 6px; margin-bottom: 14px; }
.tags span { font-size: 12px; padding: 2px 9px; border-radius: 999px; border: 1px solid rgba(255,255,255,.45); color: #eef4ee; }
.genba-otsu4 .tags span { border-color: rgba(245,196,0,.55); color: #ffe98a; }
.stamp {
  position: absolute; top: 14px; right: 14px;
  width: 54px; height: 54px; border-radius: 50%;
  background: #fff; color: #c73e1d;
  border: 2px solid #c73e1d;
  box-shadow: inset 0 0 0 2px #fff, inset 0 0 0 4px rgba(199,62,29,.55);
  display: flex; align-items: center; justify-content: center;
  font-size: 12px; font-weight: 800; letter-spacing: .06em;
  transform: rotate(-8deg);
}
.genba-unkan .btn { background: #fff; color: #1e5a3a; }
.genba-otsu4 .btn { background: #f5c400; color: #161616; }
.genba-unkan .btn.sub { background: transparent; color: #fff; border: 1px solid rgba(255,255,255,.6); }
.genba-otsu4 .btn.sub { background: transparent; color: #f5c400; border: 1px solid rgba(245,196,0,.6); }
table.facts { width: 100%; border-collapse: collapse; background: var(--card); margin: 12px 0 20px; }
table.facts th, table.facts td {
  border: 1px solid var(--line);
  padding: 10px 12px;
  text-align: left;
  vertical-align: top;
  font-size: 15px;
}
table.facts th { background: #fff3a6; width: 34%; font-weight: 800; }
.note { font-size: 13px; color: var(--sub); }
.dates { font-size: 13px; color: var(--sub); margin-top: 28px; }
footer.site {
  border-top: 0;
  background: #161616;
  padding: 20px 0 28px;
  font-size: 13px;
  color: #d6d6d6;
}
footer.site a { color: #fff; text-decoration-color: #f5c400; }
ul { margin: 0 0 14px; padding-left: 22px; }
li { margin-bottom: 6px; }