:root{--paper: #f2f4f7;--sheet: #ffffff;--ink: #1b2230;--ink-soft: #586273;--line: #c9d0db;--line-strong: #1b2230;--ai: #2a4a8a;--ai-tint: #e2e9f6;--shu: #c8452a;--shu-ink: #ffffff;--shu-tint: #fbe4dd;--matcha: #3f7a4c;--matcha-tint: #e3f0e5;--warn: #b3261e;--warn-tint: #fadfdc;--sel: #fff1b8;--same: #f6e6a6;--peer: #f7f4e6;--font-display: "Zen Maru Gothic", "Hiragino Maru Gothic ProN", "Hiragino Sans", "Noto Sans JP", "Yu Gothic", sans-serif;--font-body: "Hiragino Kaku Gothic ProN", "Hiragino Sans", "Noto Sans JP", "Yu Gothic UI", "Yu Gothic", "Meiryo", system-ui, sans-serif;--radius: 10px;--wrap: 1080px}@media(prefers-color-scheme:dark){:root:not([data-theme=light]){--paper: #12161e;--sheet: #1b212d;--ink: #e8ecf3;--ink-soft: #9ba5b6;--line: #343d4f;--line-strong: #b4bdcc;--ai: #94b3f2;--ai-tint: #23314d;--shu: #ef8a6d;--shu-ink: #1b1210;--shu-tint: #48291f;--matcha: #8acb98;--matcha-tint: #1f3628;--warn: #f3978f;--warn-tint: #4a2423;--sel: #4a4120;--same: #3c3720;--peer: #222838;color-scheme:dark}}:root[data-theme=dark]{--paper: #12161e;--sheet: #1b212d;--ink: #e8ecf3;--ink-soft: #9ba5b6;--line: #343d4f;--line-strong: #b4bdcc;--ai: #94b3f2;--ai-tint: #23314d;--shu: #ef8a6d;--shu-ink: #1b1210;--shu-tint: #48291f;--matcha: #8acb98;--matcha-tint: #1f3628;--warn: #f3978f;--warn-tint: #4a2423;--sel: #4a4120;--same: #3c3720;--peer: #222838;color-scheme:dark}*,*:before,*:after{box-sizing:border-box}html{-webkit-text-size-adjust:100%}body{margin:0;background:var(--paper);color:var(--ink);font-family:var(--font-body);font-size:16px;line-height:1.8;padding-left:max(16px,env(safe-area-inset-left,0px));padding-right:max(16px,env(safe-area-inset-right,0px));padding-bottom:env(safe-area-inset-bottom,0px)}img,svg{max-width:100%}a{color:var(--ai);text-underline-offset:3px}a:hover{text-decoration-thickness:2px}:focus-visible{outline:3px solid var(--ai);outline-offset:2px}[hidden]{display:none!important}.wrap{max-width:var(--wrap);margin:0 auto}.sr-only{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}.site-head{border-bottom:2px solid var(--line-strong)}.site-head .wrap{display:flex;align-items:center;justify-content:space-between;gap:12px 20px;flex-wrap:wrap;padding-block:12px}.logo{display:inline-flex;align-items:center;gap:10px;color:var(--ink);text-decoration:none}.logo svg{width:30px;height:30px;flex:none}.logo span{font-family:var(--font-display);font-weight:700;font-size:20px;letter-spacing:.04em;font-feature-settings:"palt"}.logo b{color:var(--shu);font-weight:700}.nav{display:flex;gap:4px;overflow-x:auto;scrollbar-width:none;margin-inline:-4px}.nav::-webkit-scrollbar{display:none}.nav a{white-space:nowrap;color:var(--ink);text-decoration:none;font-size:14px;padding:6px 12px;border-radius:999px}.nav a:hover{background:var(--ai-tint)}.nav a[aria-current=page]{background:var(--ink);color:var(--sheet)}@media(max-width:640px){.site-head .wrap{flex-direction:column;align-items:flex-start;gap:8px}.nav{width:100%}}.crumbs{font-size:12px;color:var(--ink-soft);padding-top:14px}.crumbs ol{list-style:none;margin:0;padding:0;display:flex;flex-wrap:wrap;gap:4px}.crumbs li+li:before{content:"›";margin-right:4px;color:var(--line)}.crumbs a{color:var(--ink-soft)}h1,h2,h3{font-family:var(--font-display);font-weight:700;line-height:1.4;text-wrap:balance;font-feature-settings:"palt";letter-spacing:.02em}h1{font-size:clamp(25px,4.4vw,36px);margin:0 0 10px}h2{font-size:clamp(21px,3vw,26px);margin:0 0 12px}h3{font-size:18px;margin:0 0 8px}.lead{color:var(--ink-soft);margin:0;max-width:42em}.page-intro{padding-block:22px 20px}.btn{font:inherit;font-size:14px;line-height:1.4;padding:9px 15px;border-radius:8px;border:1.5px solid var(--line);background:var(--sheet);color:var(--ink);cursor:pointer;display:inline-flex;align-items:center;justify-content:center;gap:6px;text-decoration:none;min-height:42px}.btn:hover{border-color:var(--ink-soft)}.btn[aria-pressed=true]{border-color:var(--ai);color:var(--ai);background:var(--ai-tint);font-weight:700}.btn:disabled{opacity:.45;cursor:default}.btn.primary{background:var(--shu);border-color:var(--shu);color:var(--shu-ink);font-weight:700;font-family:var(--font-display);letter-spacing:.08em;font-size:16px;padding-inline:22px}.btn.primary:hover{filter:brightness(1.06)}.btn.quiet{border-color:transparent;background:transparent;color:var(--ink-soft)}.btn.quiet:hover{color:var(--ink)}.btn svg{width:18px;height:18px;flex:none}.app{display:grid;grid-template-columns:minmax(0,1fr);gap:20px;align-items:start}@media(min-width:880px){.app{grid-template-columns:minmax(0,500px) minmax(0,1fr);gap:36px}}.boardcol{display:flex;flex-direction:column;gap:12px;min-width:0;max-width:500px;width:100%}.bar{display:flex;gap:8px;flex-wrap:wrap;align-items:center;justify-content:space-between}.seg{display:inline-flex;border:1.5px solid var(--line-strong);border-radius:999px;overflow:hidden}.seg button{border:0;background:transparent;color:var(--ink);font:inherit;font-size:13px;padding:7px 14px;cursor:pointer;min-height:36px}.seg button[aria-pressed=true]{background:var(--ink);color:var(--sheet);font-weight:700}.seg button:focus-visible{outline-offset:-3px}.board{display:grid;grid-template-columns:repeat(9,1fr);width:100%;aspect-ratio:1;background:var(--sheet);border:3px solid var(--line-strong);border-radius:6px;user-select:none;-webkit-user-select:none;touch-action:manipulation;overflow:hidden}.cell{position:relative;display:flex;align-items:center;justify-content:center;border-right:1px solid var(--line);border-bottom:1px solid var(--line);font-family:var(--font-display);font-weight:500;font-size:clamp(21px,5.6vw,30px);line-height:1;cursor:pointer;background:var(--sheet);font-variant-numeric:tabular-nums;min-width:0;outline:none}.cell:nth-child(9n){border-right:0}.cell:nth-child(n+73){border-bottom:0}.cell.br{border-right:2px solid var(--line-strong)}.cell.bb{border-bottom:2px solid var(--line-strong)}.cell.given{color:var(--ink);font-weight:700}.cell.user{color:var(--ai)}.cell.peer{background:var(--peer)}.cell.same{background:var(--same)}.cell.unit{background:var(--ai-tint)}.cell.sel{background:var(--sel)}.cell.src{box-shadow:inset 0 0 0 2.5px var(--ai)}.cell.target{background:var(--shu-tint);box-shadow:inset 0 0 0 3px var(--shu)}.cell .ghost{color:var(--shu);font-weight:700}.cell.bad,.cell.wrong{color:var(--warn);background:var(--warn-tint)}.cell.wrong:after{content:"";position:absolute;left:22%;right:22%;top:50%;border-top:2px solid var(--warn);transform:rotate(-35deg)}.cell.ok{background:var(--matcha-tint)}.cell:focus-visible{box-shadow:inset 0 0 0 3px var(--ai)}.cands{position:absolute;inset:1px;display:grid;grid-template-columns:repeat(3,1fr);grid-template-rows:repeat(3,1fr);font-family:var(--font-body);font-size:clamp(8.5px,2.2vw,11.5px);line-height:1;color:var(--ink-soft);font-weight:500}.cands span{display:flex;align-items:center;justify-content:center}.cands span.x{color:var(--shu);text-decoration:line-through;font-weight:700}.cands span.k{color:var(--ai);font-weight:700}.cands span.m{color:var(--ai)}@media(prefers-reduced-motion:no-preference){.cell{transition:background-color .12s}}.pad{display:grid;grid-template-columns:repeat(9,1fr);gap:6px}.pad button{position:relative;font-family:var(--font-display);font-size:22px;font-weight:700;padding:8px 0 12px;border:1.5px solid var(--line);border-radius:8px;background:var(--sheet);color:var(--ink);cursor:pointer;min-height:52px;font-variant-numeric:tabular-nums}.pad button:hover{border-color:var(--ai)}.pad button small{position:absolute;left:0;right:0;bottom:3px;font-family:var(--font-body);font-size:10px;font-weight:400;color:var(--ink-soft);line-height:1}.pad button.done{opacity:.35}.pad.memo-on button{color:var(--ai);font-size:16px}.actions{display:flex;flex-wrap:wrap;gap:8px}.actions .grow{flex:1 1 auto}.status{font-size:14px;color:var(--ink-soft);min-height:1.8em;margin:0}.side{display:flex;flex-direction:column;gap:16px;min-width:0}.memo{background:var(--sheet);border:1.5px solid var(--line);border-radius:var(--radius);padding:18px 20px;min-height:210px}.memo .label{font-size:12px;letter-spacing:.12em;color:var(--ink-soft);margin:0 0 6px}.memo .tech{display:inline-block;font-size:12px;font-weight:700;color:var(--shu);border:1.5px solid var(--shu);border-radius:999px;padding:1px 10px;margin-bottom:8px;text-decoration:none}.memo h2{font-size:19px;line-height:1.55;margin:0 0 8px}.memo p{margin:0 0 8px}.memo .acts{display:flex;gap:8px;flex-wrap:wrap;margin-top:12px}.memo.ok{border-color:var(--matcha)}.memo.warn{border-color:var(--warn)}.timer{font-family:var(--font-display);font-variant-numeric:tabular-nums;font-size:18px;letter-spacing:.04em}.levels{display:flex;gap:6px;flex-wrap:wrap}.steps3{display:grid;grid-template-columns:repeat(auto-fit,minmax(190px,1fr));gap:14px;margin:0;padding:0;list-style:none}.steps3 li{border-top:2px solid var(--line-strong);padding-top:8px}.steps3 b{font-family:var(--font-display);display:block;font-size:15px}.steps3 span{font-size:14px;color:var(--ink-soft)}details.text-input{font-size:14px}details.text-input summary{cursor:pointer;color:var(--ink-soft)}details.text-input textarea{width:100%;margin-top:8px;font:14px/1.5 ui-monospace,SFMono-Regular,Menlo,monospace;padding:8px;border-radius:8px;border:1.5px solid var(--line);background:var(--sheet);color:var(--ink);resize:vertical;letter-spacing:.05em}details.text-input .row{display:flex;gap:8px;flex-wrap:wrap;margin-top:8px}.board.paused .cell{color:transparent!important}.board.paused .cands{visibility:hidden}.board.paused{background:var(--peer)}.section{margin-top:56px;padding-top:22px;border-top:2px solid var(--line-strong)}.section>p.lead{margin-bottom:18px}.techlist{display:grid;grid-template-columns:repeat(auto-fit,minmax(250px,1fr));gap:0 28px;list-style:none;margin:0;padding:0}.techlist li{border-bottom:1px solid var(--line);padding:12px 0;display:grid;grid-template-columns:auto 1fr;gap:2px 10px}.lv{grid-row:span 2;font-size:11px;font-weight:700;color:var(--sheet);background:var(--ink-soft);border-radius:4px;padding:2px 7px;height:fit-content;margin-top:4px;letter-spacing:.05em}.lv.l1{background:var(--matcha)}.lv.l2{background:var(--ai)}.lv.l3{background:var(--shu)}.techlist b{font-family:var(--font-display)}.techlist a{color:var(--ink)}.techlist small{color:var(--ink-soft);font-size:14px}.cards{display:grid;grid-template-columns:repeat(auto-fit,minmax(230px,1fr));gap:14px}.card{display:flex;flex-direction:column;gap:6px;background:var(--sheet);border:1.5px solid var(--line);border-radius:var(--radius);padding:16px 18px;text-decoration:none;color:var(--ink)}.card:hover{border-color:var(--ai)}.card b{font-family:var(--font-display);font-size:17px}.card span{font-size:14px;color:var(--ink-soft)}.article{max-width:760px}.article p,.article li{max-width:40em}.article h2{margin-top:48px;padding-top:18px;border-top:2px solid var(--line-strong)}.article h3{margin-top:28px}.article ul,.article ol{padding-left:1.4em}.article li{margin:4px 0}.toc{background:var(--sheet);border:1.5px solid var(--line);border-radius:var(--radius);padding:14px 20px;margin:18px 0;font-size:15px}.toc b{font-family:var(--font-display)}.toc ol{margin:6px 0 0;padding-left:1.4em}.point{background:var(--ai-tint);border-radius:var(--radius);padding:14px 18px;margin:16px 0}.point b{font-family:var(--font-display);color:var(--ai);display:block;margin-bottom:2px}.ng{background:var(--shu-tint);border-radius:var(--radius);padding:14px 18px;margin:16px 0}.ng b{font-family:var(--font-display);color:var(--shu);display:block;margin-bottom:2px}.next{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:12px;margin-top:28px}table.simple{border-collapse:collapse;width:100%;font-size:15px}table.simple th,table.simple td{border-bottom:1px solid var(--line);padding:8px 10px;text-align:left;vertical-align:top}table.simple th{font-weight:700;background:var(--sheet)}.tablewrap{overflow-x:auto}.demo{display:grid;grid-template-columns:minmax(0,1fr);gap:16px;background:var(--sheet);border:1.5px solid var(--line);border-radius:var(--radius);padding:16px;margin:18px 0}@media(min-width:720px){.demo{grid-template-columns:minmax(0,340px) minmax(0,1fr);align-items:start}}.demo .board{max-width:340px;border-width:2.5px}.demo .cell{font-size:clamp(17px,4.6vw,22px)}.demo .cands{font-size:clamp(7.5px,1.9vw,9.5px)}.demo .memo{border:0;padding:0;min-height:0}.demo-tag{font-size:12px;color:var(--ink-soft);letter-spacing:.1em}.print-controls{display:flex;flex-wrap:wrap;gap:14px 24px;align-items:end;background:var(--sheet);border:1.5px solid var(--line);border-radius:var(--radius);padding:16px 18px}.print-controls label{display:flex;flex-direction:column;gap:4px;font-size:13px;color:var(--ink-soft)}select{font:inherit;font-size:15px;padding:8px 10px;border:1.5px solid var(--line);border-radius:8px;background:var(--sheet);color:var(--ink);min-height:42px}.sheets{margin-top:24px;display:flex;flex-direction:column;gap:24px}.sheet{background:#fff;color:#111;border:1px solid var(--line);border-radius:4px;padding:28px}.sheet h2{color:#111;font-size:18px;border:0;margin:0 0 4px;padding:0}.sheet .meta{font-size:12px;color:#555;margin-bottom:14px;display:flex;justify-content:space-between;gap:10px;flex-wrap:wrap}.sheet .grids{display:grid;gap:24px}.sheet .grids.n1{grid-template-columns:minmax(0,520px);justify-content:center}.sheet .grids.n2,.sheet .grids.n4{grid-template-columns:repeat(2,minmax(0,1fr))}.pgrid{width:100%;aspect-ratio:1;display:grid;grid-template-columns:repeat(9,1fr);border:2.5px solid #111}.pgrid div{border-right:1px solid #999;border-bottom:1px solid #999;display:flex;align-items:center;justify-content:center;font-family:var(--font-display);font-weight:700;font-size:clamp(11px,2.6vw,22px);color:#111}.pgrid.sm div{font-size:clamp(9px,2vw,15px)}.pgrid div:nth-child(9n){border-right:0}.pgrid div:nth-child(n+73){border-bottom:0}.pgrid div.br{border-right:2px solid #111}.pgrid div.bb{border-bottom:2px solid #111}.pgrid div.sol{color:#2a4a8a;font-weight:500}.pcap{font-size:12px;color:#444;margin-top:4px}.ad-slot{margin:28px 0;min-height:0}.site-foot{margin-top:72px;border-top:2px solid var(--line-strong);padding-block:22px 32px;font-size:13px;color:var(--ink-soft)}.site-foot .cols{display:grid;grid-template-columns:repeat(auto-fit,minmax(170px,1fr));gap:16px 24px}.site-foot b{font-family:var(--font-display);color:var(--ink);display:block;margin-bottom:4px;font-size:14px}.site-foot ul{list-style:none;margin:0;padding:0}.site-foot li{margin:3px 0}.site-foot a{color:var(--ink-soft)}.site-foot .copy{margin-top:18px}@media print{@page{size:A4;margin:14mm}body{background:#fff;padding:0}.site-head,.site-foot,.crumbs,.page-intro,.print-controls,.ad-slot,.no-print{display:none!important}.sheets{margin:0;gap:0}.sheet{border:0;padding:0;page-break-after:always;break-after:page}.sheet .grids{gap:14mm}}.side .cards{grid-template-columns:1fr}