:root{--bg:#fff;--fg:#1b1b1b;--muted:#5d5d5d;--line:#ddd;--accent:#8a5410;--win:#d8961c;--loss:#fff;--cell:#f2f2f2}
:root[data-theme=dark]{--bg:#141414;--fg:#e8e8e8;--muted:#a8a8a8;--line:#333;--accent:#e6b866;--win:#e8ad35;--loss:#fff;--cell:#2a2a2a}
*{box-sizing:border-box}
body{margin:0;background:var(--bg);color:var(--fg);font:16px/1.7 system-ui,-apple-system,"Hiragino Sans","Noto Sans JP",sans-serif}
main{max-width:46rem;margin:0 auto;padding:1.5rem 1rem 4rem}
a{color:var(--accent)}
.languages{display:flex;justify-content:flex-end;gap:1rem;font-size:.9rem}
.languages button{background:none;border:0;color:var(--accent);cursor:pointer;font:inherit;padding:0 .2rem}
.languages [aria-pressed=true]{font-weight:bold;text-decoration:underline}
.overline{letter-spacing:.08em;font-size:.8rem;color:var(--muted);margin:0}
h1{font-size:2rem;line-height:1.25;margin:.3rem 0 .6rem}
.lead{font-size:1.1rem}
.links{font-size:.95rem}
nav{display:flex;flex-wrap:wrap;gap:.3rem .9rem;font-size:.9rem;border-top:1px solid var(--line);border-bottom:1px solid var(--line);padding:.6rem 0;margin:1.2rem 0}
h2{font-size:1.35rem;margin:2.2rem 0 .6rem}
h3{font-size:1.05rem;margin:1.4rem 0 .4rem}
.result{border-left:4px solid var(--win);padding:.4rem .8rem;font-weight:bold}
.note{font-size:.88rem;color:var(--muted)}
.scroll{overflow-x:auto}
table{border-collapse:collapse;margin:1rem 0;font-size:.93rem}
caption,.tcap{text-align:left;color:var(--muted);font-size:.88rem;padding-bottom:.3rem}
.tcap{margin:1rem 0 0}.tcap+.scroll table{margin-top:.2rem}
th,td{border-bottom:1px solid var(--line);padding:.35rem .7rem;text-align:left}
td:not(:first-child),th:not(:first-child){text-align:right}
pre{background:var(--cell);padding:.8rem;overflow-x:auto;font-size:.82rem;line-height:1.5}
code{font-family:ui-monospace,Menlo,monospace;font-size:.92em}
figure{margin:1.4rem 0}
figcaption{font-size:.88rem;color:var(--muted);text-align:center}
.sw{display:inline-block;width:.9em;height:.9em;vertical-align:-.1em;margin:0 .25em 0 .6em;border-radius:2px}
.sw.win{background:var(--win)}.sw.loss{background:var(--loss);border:1px solid #000}
[hidden]{display:none!important}
.explorer{max-width:32rem;margin:0 auto}
.ex-head{display:flex;justify-content:space-between;align-items:center;gap:.5rem;flex-wrap:wrap}
.ex-rule{display:flex;gap:.3rem}
.explorer button{font:inherit;font-size:.9rem;padding:.25rem .8rem;border:2px solid var(--fg);background:var(--bg);color:var(--fg);border-radius:6px;cursor:pointer}
.explorer [aria-pressed=true]{background:var(--win);border-color:var(--win);color:#2a1800}
.ex-title{font-weight:bold;margin:.6rem 0 .2rem}
.ex-board{width:100%;height:auto;display:block}
.ex-cell{stroke:#000;stroke-width:.35}
.ex-win{fill:var(--win)}.ex-loss{fill:#000}.ex-dup{fill:#9a9a9a}.ex-unk,.ex-white{fill:#fff}.ex-black,.ex-stone{fill:#000}
.ex-click{cursor:pointer}.ex-click:hover{stroke:var(--win);stroke-width:1.1}
.ex-dot{fill:var(--win);pointer-events:none}
.ex-label{fill:#fff;font-size:2.6px;font-weight:bold;text-anchor:middle;dominant-baseline:central;pointer-events:none;font-family:system-ui,sans-serif}
.ex-summary,.ex-note{font-size:.9rem;margin:.3rem 0}
.ex-legend{font-size:.85rem;color:var(--muted)}
.sw.ex-win{background:var(--win)}.sw.ex-loss{background:#000}.sw.ex-dup{background:#9a9a9a}.sw.ex-unk{background:#fff;border:1px solid #000}
.bl-range{width:100%}
.bl-pass{fill:#000;stroke:var(--win);stroke-width:1.1}
.ex-label.bl-cur{fill:var(--win);font-size:3.4px}
.bl-pair{display:grid;grid-template-columns:1fr;gap:1.5rem}
@media(min-width:700px){.bl-pair{grid-template-columns:1fr 1fr}}
.bl-pair h4{margin:.2rem 0;text-align:center}
.pa-ctrl{display:flex;flex-direction:column;align-items:center;gap:.35rem;margin:.2rem 0}
.pa-row{display:flex;align-items:center;justify-content:center;gap:.3rem;font-size:.8rem;color:var(--muted)}
.pa-ctrl button{font:inherit;font-size:.85rem;min-width:2.2rem;padding:.15rem .5rem;border:1px solid var(--line);background:var(--bg);color:var(--fg);border-radius:4px;cursor:pointer}
.pa-ctrl button[aria-pressed=true]{background:var(--win);border-color:var(--win);color:#2a1800}
.pa-ctrl .pa-btn{min-width:4.2rem}
.pa-info{min-height:4.9em}
.sw.ex-black{background:#000}
.sw.pa-dot{background-image:radial-gradient(circle,var(--win) 28%,transparent 32%)}
/* tables never squeeze numbers onto two lines; a table wider than the screen scrolls sideways inside its box */
.scroll{-webkit-overflow-scrolling:touch;background:linear-gradient(to right,var(--bg) 30%,transparent) left/2rem 100% no-repeat local,linear-gradient(to left,var(--bg) 30%,transparent) right/2rem 100% no-repeat local,radial-gradient(farthest-side at 0 50%,#0002,transparent) left/.7rem 100% no-repeat scroll,radial-gradient(farthest-side at 100% 50%,#0002,transparent) right/.7rem 100% no-repeat scroll}
td:not(:first-child){white-space:nowrap}
th{word-break:keep-all;overflow-wrap:normal}
@media(max-width:640px){
  main{padding:1rem 1rem 2rem}
  h1{font-size:1.55rem}
  .lead{font-size:1rem}
  h2{font-size:1.2rem;margin-top:1.8rem}
  table{font-size:.8rem;margin:.6rem 0}
  th,td{padding:.3rem .45rem}
  th:first-child,td:first-child{padding-left:0;min-width:6.5em}
  caption,.tcap{font-size:.8rem}
  figcaption,.note{font-size:.82rem}
  pre{font-size:.75rem;margin-left:-1rem;margin-right:-1rem}
  .math,mjx-container,.katex-display{overflow-x:auto;overflow-y:hidden}
}