:root {
  --bg: #ffffff;
  --fg: #1b2733;
  --muted: #5a6b7b;
  --accent: #1a6fd1;
  --accent-soft: #eaf3fd;
  --line: #d5e0ec;
  --th-bg: #f1f6fc;
  --mark-bg: #fff2b3;
  --mark-fg: #5a4300;
  --check-bg: #ffd9d4;
  --check-fg: #7a1d12;
  --banner-bg: #fff4d6;
  --banner-fg: #5a4300;
  --banner-line: #e8c96a;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0f1722;
    --fg: #e4ebf3;
    --muted: #9aaabb;
    --accent: #6cb0ff;
    --accent-soft: #16263a;
    --line: #2a3a4d;
    --th-bg: #17243a;
    --mark-bg: #5a4a10;
    --mark-fg: #ffe9a0;
    --check-bg: #6a2820;
    --check-fg: #ffd2cb;
    --banner-bg: #3a3012;
    --banner-fg: #ffe9a0;
    --banner-line: #7a6620;
  }
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font-family: -apple-system, BlinkMacSystemFont, "Hiragino Sans", "Hiragino Kaku Gothic ProN", "Yu Gothic", "Meiryo", "Noto Sans JP", sans-serif;
  font-size: 1rem;
  line-height: 1.85;
  overflow-wrap: anywhere;
}
.banner {
  background: var(--banner-bg);
  color: var(--banner-fg);
  border-bottom: 1px solid var(--banner-line);
  padding: 0.75rem 1rem;
  font-weight: 700;
  text-align: center;
  line-height: 1.6;
}
.site-header {
  border-bottom: 3px solid var(--accent);
  padding: 0.9rem 1rem;
  max-width: 42rem;
  margin: 0 auto;
}
.site-header a {
  color: var(--accent);
  font-weight: 700;
  font-size: 1.125rem;
  text-decoration: none;
}
main, .site-footer {
  max-width: 42rem;
  margin: 0 auto;
  padding: 1rem;
}
h1, h2, h3 { line-height: 1.5; }
h1 { font-size: 1.6rem; margin: 1.2rem 0 1rem; }
h2 {
  font-size: 1.3rem;
  margin: 2.2rem 0 0.8rem;
  padding-left: 0.6rem;
  border-left: 4px solid var(--accent);
}
h3 { font-size: 1.1rem; margin: 1.6rem 0 0.5rem; color: var(--accent); }
p { margin: 0.8rem 0; }
ul, ol { margin: 0.8rem 0; padding-left: 1.5rem; }
li { margin: 0.25rem 0; }
li > ul, li > ol { margin: 0.25rem 0; }
a { color: var(--accent); }
a:focus-visible, .table-wrap:focus-visible { outline: 3px solid var(--accent); outline-offset: 2px; }
code {
  background: var(--accent-soft);
  padding: 0.1rem 0.35rem;
  border-radius: 4px;
  font-family: ui-monospace, "SFMono-Regular", Consolas, monospace;
  font-size: 0.9em;
}
.table-wrap {
  overflow-x: auto;
  margin: 1rem 0;
  border: 1px solid var(--line);
  border-radius: 6px;
  -webkit-overflow-scrolling: touch;
}
table { border-collapse: collapse; width: 100%; min-width: 30rem; font-size: 0.95rem; line-height: 1.7; }
th, td { border-bottom: 1px solid var(--line); padding: 0.6rem 0.75rem; text-align: left; vertical-align: top; }
th { background: var(--th-bg); font-weight: 700; white-space: nowrap; }
tr:last-child td { border-bottom: 0; }
mark.ph { background: var(--mark-bg); color: var(--mark-fg); padding: 0 0.15rem; border-radius: 3px; }
mark.ph-check { background: var(--check-bg); color: var(--check-fg); }
.link-list { list-style: none; padding: 0; }
.link-list li { margin: 0.5rem 0; }
.link-list a {
  display: block;
  padding: 0.8rem 1rem;
  border: 1px solid var(--line);
  border-left: 4px solid var(--accent);
  border-radius: 6px;
  text-decoration: none;
  font-weight: 700;
}
.link-list a:hover { background: var(--accent-soft); }
.site-footer { border-top: 1px solid var(--line); margin-top: 2rem; color: var(--muted); font-size: 0.9rem; }
.site-footer nav a { display: inline-block; margin: 0 1rem 0.4rem 0; }
.site-footer [aria-current="page"] { color: var(--muted); font-weight: 700; }