:root {
  --bg: #fafaf7;
  --card: #ffffff;
  --ink: #1f2430;
  --muted: #5c6672;
  --line: #e3e6ea;
  --accent: #0f6b4f;
  --accent-soft: #e6f2ec;
  --warn: #8a5a00;
  --warn-soft: #fdf3df;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: "Hiragino Kaku Gothic ProN", "Noto Sans JP", "Yu Gothic UI", Meiryo, sans-serif;
  line-height: 1.75;
  font-size: 16px;
}
a { color: var(--accent); }
header.site {
  border-bottom: 1px solid var(--line);
  background: var(--card);
}
.site-inner, main, footer .inner {
  max-width: 860px;
  margin: 0 auto;
  padding: 0 20px;
}
.site-inner { display: flex; flex-wrap: wrap; align-items: center; gap: 12px; padding-top: 14px; padding-bottom: 14px; }
.brand { font-weight: 700; font-size: 18px; color: var(--ink); text-decoration: none; letter-spacing: .02em; }
.brand small { display: block; font-weight: 400; font-size: 12px; color: var(--muted); }
nav { margin-left: auto; display: flex; gap: 16px; flex-wrap: wrap; }
nav a { text-decoration: none; color: var(--muted); font-size: 14px; }
nav a:hover { color: var(--accent); }
main { padding: 28px 20px 48px; }
h1 { font-size: 26px; line-height: 1.4; margin: 0 0 6px; }
h2 { font-size: 20px; margin: 34px 0 10px; border-left: 4px solid var(--accent); padding-left: 10px; }
h3 { font-size: 17px; margin: 22px 0 8px; }
p.lede { color: var(--muted); margin: 0 0 22px; }
.lead { background: var(--accent-soft); border: 1px solid #cfe6da; border-radius: 10px; padding: 16px 18px; margin: 18px 0 26px; }
.cards { display: grid; grid-template-columns: repeat(auto-fill, minmax(250px, 1fr)); gap: 14px; margin: 20px 0; }
.card { background: var(--card); border: 1px solid var(--line); border-radius: 10px; padding: 16px; }
.card h3 { margin: 0 0 6px; }
.card h3 a { text-decoration: none; }
.card p { margin: 0; font-size: 14px; color: var(--muted); }
.badge { display: inline-block; font-size: 12px; font-weight: 700; border-radius: 999px; padding: 2px 10px; margin-bottom: 8px; }
.grade-A, .grade-Bp, .grade-B { background: var(--accent-soft); color: var(--accent); }
.grade-Bm, .grade-C { background: var(--warn-soft); color: var(--warn); }
.grade-D, .grade-E { background: #fdeaea; color: #a12622; }
table { border-collapse: collapse; width: 100%; margin: 14px 0; font-size: 14px; }
th, td { border: 1px solid var(--line); padding: 8px 10px; text-align: left; vertical-align: top; }
th { background: #f2f4f6; }
.note { background: var(--warn-soft); border: 1px solid #ecd9ae; border-radius: 10px; padding: 14px 16px; font-size: 14px; }
.sources { font-size: 14px; }
.sources li { margin: 6px 0; }
footer { border-top: 1px solid var(--line); margin-top: 40px; background: var(--card); }
footer .inner { padding-top: 18px; padding-bottom: 26px; font-size: 13px; color: var(--muted); }
footer a { color: var(--muted); }
.aff { background: #f4f7f5; border: 1px dashed #b9cfc4; border-radius: 8px; padding: 10px 14px; font-size: 14px; margin: 14px 0; }
.aff a { font-weight: 700; }
.meta { font-size: 13px; color: var(--muted); margin-bottom: 18px; }
ul { padding-left: 1.3em; }
@media (max-width: 640px) { h1 { font-size: 22px; } nav { margin-left: 0; } }