:root {
  --bg: #f5f6f3;
  --surface: #ffffff;
  --ink: #18242a;
  --muted: #5a666d;
  --line: #dfe3df;
  --soft: #eef1ee;
  --brand: #0d5c63;
  --brand-2: #127a83;
  --bar: #cfe6e3;
  --bar-2: #9fd0ca;
  --warn-bg: #fff7e6;
  --warn-line: #ecd29b;
  --warn-ink: #6b4b0f;
  --radius: 14px;
  --shadow: 0 1px 2px rgba(24, 36, 42, .06), 0 4px 14px rgba(24, 36, 42, .05);
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #0f1517; --surface: #162024; --ink: #e5eced; --muted: #a0aeb2; --line: #2a373b; --soft: #1c282c;
    --brand: #7cc9c4; --brand-2: #96d6d1; --bar: #1f3b3d; --bar-2: #2c5658;
    --warn-bg: #2a2313; --warn-line: #5c4a20; --warn-ink: #f0d9a6;
    --shadow: none; color-scheme: dark;
  }
}
:root[data-theme="dark"] {
  --bg: #0f1517; --surface: #162024; --ink: #e5eced; --muted: #a0aeb2; --line: #2a373b; --soft: #1c282c;
  --brand: #7cc9c4; --brand-2: #96d6d1; --bar: #1f3b3d; --bar-2: #2c5658;
  --warn-bg: #2a2313; --warn-line: #5c4a20; --warn-ink: #f0d9a6;
  --shadow: none; color-scheme: dark;
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0; background: var(--bg); color: var(--ink);
  font-family: "Hiragino Sans", "Hiragino Kaku Gothic ProN", "Noto Sans JP", "Yu Gothic UI", "Yu Gothic", Meiryo, system-ui, sans-serif;
  font-size: 16px; line-height: 1.75; letter-spacing: .01em;
}
a { color: var(--brand-2); text-underline-offset: 2px; }
a:hover { color: var(--brand); }
h1, h2, h3 { line-height: 1.4; margin: 0 0 .5em; }
h1 { font-size: clamp(1.4rem, 4.4vw, 1.95rem); letter-spacing: .02em; }
h2 { font-size: 1.18rem; }
h2 small { font-weight: 400; font-size: .78rem; margin-left: .5em; }
h3 { font-size: 1rem; }
p { margin: 0 0 .8em; }
small { color: var(--muted); }
.wrap { max-width: 1020px; margin: 0 auto; padding: 0 16px; }
.vh { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); }

/* header */
.hd { background: var(--surface); border-bottom: 1px solid var(--line); position: sticky; top: 0; z-index: 20; }
.hd-in { display: flex; align-items: center; gap: 12px; min-height: 58px; flex-wrap: wrap; padding-top: 8px; padding-bottom: 8px; }
.logo { display: flex; align-items: center; gap: 8px; color: var(--ink); text-decoration: none; font-weight: 800; letter-spacing: .04em; white-space: nowrap; }
.logo-m { display: inline-grid; place-items: center; width: 30px; height: 30px; border-radius: 8px; background: var(--brand); color: #fff; font-size: .95rem; }
:root[data-theme="dark"] .logo-m { color: #0f1517; }
@media (prefers-color-scheme: dark) { :root:not([data-theme="light"]) .logo-m { color: #0f1517; } }
.nv { display: flex; gap: 14px; font-size: .9rem; margin-left: auto; }
.nv a { color: var(--muted); text-decoration: none; white-space: nowrap; }
.nv a:hover { color: var(--ink); }
.sb { position: relative; flex: 1 1 240px; max-width: 400px; }
.sb-i {
  width: 100%; font: inherit; font-size: 16px; padding: 8px 14px; border-radius: 999px; border: 1px solid var(--line);
  background: var(--soft); color: var(--ink); outline: none;
}
.sb-i:focus { border-color: var(--brand-2); background: var(--surface); box-shadow: 0 0 0 3px color-mix(in srgb, var(--brand-2) 20%, transparent); }
.sb-r {
  position: absolute; left: 0; right: 0; top: calc(100% + 6px); background: var(--surface); border: 1px solid var(--line);
  border-radius: 12px; box-shadow: 0 10px 30px rgba(0, 0, 0, .14); overflow: hidden; z-index: 30; max-height: 70vh; overflow-y: auto;
}
.sb-r a { display: block; padding: 9px 14px; text-decoration: none; color: var(--ink); border-top: 1px solid var(--line); }
.sb-r a:first-child { border-top: 0; }
.sb-r a:hover, .sb-r a.on { background: var(--soft); }
.sb-r small { display: block; font-size: .78rem; }
.sb-r .sb-none { padding: 10px 14px; color: var(--muted); font-size: .9rem; }
.sb-big { max-width: 560px; margin: 14px 0 6px; }
.sb-big .sb-i { padding: 12px 18px; font-size: 17px; background: var(--surface); box-shadow: var(--shadow); }
@media (max-width: 720px) {
  .nv { order: 3; width: 100%; justify-content: space-between; margin: 0; gap: 8px; font-size: .85rem; }
  .sb { order: 2; flex-basis: 100%; max-width: none; }
  .hd { position: static; }
}

/* page */
main { padding: 18px 0 40px; }
.bc ol { list-style: none; display: flex; flex-wrap: wrap; gap: 4px; padding: 0; margin: 0 0 12px; font-size: .8rem; color: var(--muted); }
.bc li + li::before { content: "›"; margin-right: 4px; }
.bc a { color: var(--muted); }
.ph { margin: 6px 0 16px; }
.eyebrow { color: var(--brand-2); font-size: .82rem; font-weight: 700; margin: 0 0 4px; letter-spacing: .03em; }
.lead { color: var(--muted); font-size: .98rem; }
.official { font-size: .85rem; color: var(--muted); margin: -.3em 0 .5em; }
.card { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 18px 18px 12px; margin: 0 0 16px; box-shadow: var(--shadow); }
.sec { margin: 26px 0; }
.note { color: var(--muted); font-size: .8rem; line-height: 1.65; }
.ul { padding-left: 1.2em; margin: 0 0 .6em; }
.ul li { margin: .3em 0; }
.eg { font-size: .88rem; color: var(--muted); }

.hero { padding: 18px 0 6px; }
.hero h1 { font-size: clamp(1.6rem, 5.4vw, 2.4rem); }

.caution {
  background: var(--warn-bg); border: 1px solid var(--warn-line); color: var(--warn-ink); border-radius: 12px;
  padding: 10px 14px; font-size: .85rem; line-height: 1.7; margin: 0 0 18px;
}
.caution b { display: block; font-size: .82rem; }
.caution a { color: inherit; }

/* key numbers */
.kpi { list-style: none; padding: 0; margin: 0 0 8px; display: grid; grid-template-columns: repeat(auto-fill, minmax(150px, 1fr)); gap: 10px; }
.kpi li { background: var(--soft); border-radius: 10px; padding: 10px 12px; display: flex; flex-direction: column; gap: 2px; }
.kpi span { font-size: .78rem; color: var(--muted); }
.kpi b { font-size: 1.35rem; font-variant-numeric: tabular-nums; line-height: 1.3; }
.kpi b small { font-size: .78rem; font-weight: 400; margin-left: 2px; }
.kpi li > small { font-size: .72rem; line-height: 1.4; }
.kpi-h { grid-template-columns: repeat(auto-fill, minmax(160px, 1fr)); }
@media (max-width: 560px) { .kpi, .kpi-h { grid-template-columns: 1fr 1fr; gap: 8px; } .kpi b { font-size: 1.15rem; } }
.kv { list-style: none; padding: 0; margin: 0 0 12px; display: grid; grid-template-columns: repeat(auto-fill, minmax(190px, 1fr)); gap: 6px 16px; }
.kv li { display: flex; justify-content: space-between; gap: 8px; border-bottom: 1px dashed var(--line); padding: 3px 0; font-size: .9rem; }
.kv span { color: var(--muted); }
.kv b { font-variant-numeric: tabular-nums; }

/* tables */
.tw { overflow-x: auto; -webkit-overflow-scrolling: touch; background: var(--surface); border: 1px solid var(--line); border-radius: 12px; }
table { border-collapse: collapse; width: 100%; font-size: .9rem; }
th, td { padding: 8px 10px; border-bottom: 1px solid var(--line); text-align: left; vertical-align: top; }
thead th { background: var(--soft); font-size: .78rem; color: var(--muted); font-weight: 700; white-space: nowrap; position: sticky; top: 0; }
thead th small { display: block; font-weight: 400; font-size: .68rem; }
tbody tr:last-child td, tbody tr:last-child th { border-bottom: 0; }
th.n, td.n { text-align: right; white-space: nowrap; font-variant-numeric: tabular-nums; }
td.n { position: relative; min-width: 84px; }
td.n span { position: relative; }
td.n small { font-size: .78em; }
td.n .bar { position: absolute; right: 10px; bottom: 7px; height: 4px; background: var(--bar-2); border-radius: 2px; max-width: calc(100% - 20px); }
td.nd small { font-size: .75rem; }
td.d { color: var(--muted); }
td.rk { width: 3em; text-align: right; color: var(--muted); font-variant-numeric: tabular-nums; }
td.hn { min-width: 200px; }
td.hn a { font-weight: 700; text-decoration: none; }
td.hn a:hover { text-decoration: underline; }
td.hn small { display: block; font-size: .74rem; line-height: 1.5; }
td.hn small.off { display: inline; font-size: .75rem; font-weight: 400; }
td.hn small.br { color: var(--muted); }
.rt tbody tr:hover { background: color-mix(in srgb, var(--soft) 60%, transparent); }
@media (max-width: 720px) {
  table { font-size: .84rem; }
  th, td { padding: 7px 7px; }
  td.n { min-width: 72px; }
  /* 横に動かしても順位と名前は見えるようにする */
  .rt .rk { position: sticky; left: 0; z-index: 2; background: var(--surface); width: 3.4em; min-width: 3.4em; max-width: 3.4em; padding-left: 4px; padding-right: 6px; }
  .rt th.rk::after { content: none; }
  .rt .hn { position: sticky; left: 0; z-index: 2; background: var(--surface); min-width: 136px; max-width: 150px; box-shadow: 1px 0 0 var(--line); }
  .rt.has-rk .hn { left: 3.4em; }
  .rt thead .rk, .rt thead .hn { background: var(--soft); z-index: 3; }
}
.dt th small { display: block; font-weight: 400; font-size: .74rem; }
.dt tbody th { font-weight: 600; }
.sortable th[data-sort] { cursor: pointer; user-select: none; }
.sortable th[data-sort]::after { content: " ↕"; color: var(--line); font-weight: 400; }
.sortable th[aria-sort="descending"]::after { content: " ↓"; color: var(--brand-2); }
.sortable th[aria-sort="ascending"]::after { content: " ↑"; color: var(--brand-2); }

/* chips */
.chips { display: flex; flex-wrap: wrap; gap: 6px; margin: 0 0 8px; }
.chip { display: inline-flex; align-items: baseline; gap: 4px; padding: 4px 10px; border-radius: 999px; border: 1px solid var(--line); background: var(--surface); text-decoration: none; color: var(--ink); font-size: .86rem; }
a.chip:hover { border-color: var(--brand-2); }
.chip small { font-size: .7rem; }
.chip.on { background: var(--brand); color: #fff; border-color: var(--brand); }
.chip.on small { color: inherit; }
.chip.off { color: var(--muted); background: transparent; border-style: dashed; }
.chips-r { display: grid; gap: 8px; margin-bottom: 6px; }
.chips-g { display: grid; grid-template-columns: 7.5em 1fr; gap: 6px; align-items: start; }
.chips-h { font-size: .78rem; color: var(--muted); padding-top: 6px; }
@media (max-width: 560px) { .chips-g { grid-template-columns: 1fr; } .chips-h { padding-top: 0; } }
.toc { margin-bottom: 18px; }

/* lists */
.tgs { display: grid; grid-template-columns: repeat(auto-fill, minmax(300px, 1fr)); gap: 6px 22px; }
.tg h3 { font-size: .86rem; color: var(--muted); margin: 10px 0 6px; }
.tl { list-style: none; padding: 0; margin: 0 0 10px; display: grid; grid-template-columns: repeat(auto-fill, minmax(260px, 1fr)); gap: 6px; }
.tg .tl { grid-template-columns: 1fr; }
.tl a { display: block; padding: 8px 12px; border: 1px solid var(--line); background: var(--surface); border-radius: 10px; text-decoration: none; color: var(--ink); }
.tl a:hover { border-color: var(--brand-2); }
.tl b { display: block; font-size: .95rem; }
.tl small { display: block; font-size: .76rem; line-height: 1.5; }
.tl-s b { font-size: .88rem; font-weight: 600; }
.cl { list-style: none; padding: 0; margin: 0 0 10px; display: grid; grid-template-columns: repeat(auto-fill, minmax(260px, 1fr)); gap: 6px; }
.cl a { display: block; padding: 8px 12px; border-radius: 10px; border: 1px solid var(--line); background: var(--surface); text-decoration: none; color: var(--ink); font-weight: 600; }
.cl a:hover { border-color: var(--brand-2); }
.cl small { display: block; font-weight: 400; font-size: .76rem; }
.cl-n { counter-reset: n; }
.cl-n li { counter-increment: n; }
.cl-n a::before { content: counter(n) ". "; color: var(--muted); }
.few li { font-size: .88rem; }

/* badges */
.bdg { list-style: none; padding: 0; margin: 0 0 8px; display: grid; grid-template-columns: repeat(auto-fill, minmax(230px, 1fr)); gap: 8px; }
.bdg a { display: grid; grid-template-columns: 1fr auto; gap: 0 10px; padding: 10px 12px; border-radius: 10px; border: 1px solid var(--line); background: var(--surface); text-decoration: none; color: var(--ink); }
.bdg a:hover { border-color: var(--brand-2); }
.bdg span { font-size: .85rem; font-weight: 600; }
.bdg b { grid-row: span 2; align-self: center; font-size: 1.25rem; color: var(--brand); font-variant-numeric: tabular-nums; }
.bdg b small { font-size: .7rem; font-weight: 400; }
.bdg a > small { font-size: .74rem; }

/* definitions */
.def { border-top: 1px solid var(--line); padding: 10px 0 4px; }
.def h3 { margin: 0 0 4px; }
.def h3 small { font-weight: 400; margin-left: 8px; font-size: .78rem; }
.def p { font-size: .9rem; margin-bottom: 4px; }
details summary { cursor: pointer; color: var(--brand-2); font-size: .85rem; }
.def-l { padding-left: 1.1em; margin: 6px 0; font-size: .84rem; }
.def-l > li { margin: 4px 0; }
.def-l ul { padding-left: 1.1em; margin: 2px 0; }
.def-h { font-weight: 700; font-size: .8rem; color: var(--muted); }
.def-l small { font-size: .72rem; }
.dt details { font-weight: 400; margin-top: 2px; }

/* age bars */
.hbar { display: grid; gap: 4px; margin: 6px 0 14px; }
.hbar-r { display: grid; grid-template-columns: 6.5em 1fr 4.2em; align-items: center; gap: 8px; font-size: .82rem; }
.hbar-r i { display: block; height: 14px; background: var(--bar-2); border-radius: 3px; }
.hbar-r b { font-weight: 400; text-align: right; font-variant-numeric: tabular-nums; color: var(--muted); }
.kl { padding-left: 1.4em; margin: 6px 0 8px; font-size: .88rem; }
.kl li { margin: 3px 0; }
.kl b { font-weight: 600; margin-left: 8px; font-variant-numeric: tabular-nums; }
.kl small { font-size: .72rem; }

.dl { margin: 0 0 10px; }
.dl > div { display: grid; grid-template-columns: 11em 1fr; gap: 10px; padding: 6px 0; border-bottom: 1px dashed var(--line); font-size: .92rem; }
.dl dt { color: var(--muted); }
.dl dd { margin: 0; }
.dl dd small { display: block; font-size: .78rem; }
@media (max-width: 560px) { .dl > div { grid-template-columns: 1fr; gap: 0; } }
.faq h3 { font-size: .95rem; margin: 12px 0 4px; }
.faq p { font-size: .92rem; }

/* share */
.share { display: flex; flex-wrap: wrap; align-items: center; gap: 8px; margin: 26px 0 6px; }
.share-l { font-size: .8rem; color: var(--muted); }
.sh { font: inherit; font-size: .82rem; padding: 5px 12px; border-radius: 999px; border: 1px solid var(--line); background: var(--surface); color: var(--ink); text-decoration: none; cursor: pointer; }
.sh:hover { border-color: var(--brand-2); }

/* footer */
.ft { border-top: 1px solid var(--line); background: var(--surface); padding: 22px 0 30px; font-size: .78rem; color: var(--muted); }
.ft a { color: var(--muted); }
.ft-src { color: var(--ink); }
.ft-nv { display: flex; flex-wrap: wrap; gap: 6px 16px; margin: 10px 0; }
.ft-c { margin-top: 10px; }