:root{--ink:#333;--ink-strong:#1f1f1f;--muted:#595959;--bg:#fbf8f1;--paper:#fff;--line:#2b2b2b;--line-thin:#a3a3a3;--accent:#a84a14;--accent-dark:#8a3c0f;--accent-soft:#fbeadb;--user:#1747c4;--peer:#e6edf6;--same:#f9d9a6;--error:#c41a1a;--hint:#ffe066;--ok:#1d6b3a;--tap:max(48px, 2.7rem);--radius:12px;color:var(--ink);background:var(--bg);-webkit-text-size-adjust:100%;-moz-text-size-adjust:100%;text-size-adjust:100%;font-family:Hiragino Sans,Hiragino Kaku Gothic ProN,Noto Sans JP,Yu Gothic,Meiryo,sans-serif;font-size:18px;line-height:1.7}:root[data-font=xlarge]{font-size:22px}*,:before,:after{box-sizing:border-box}html,body{background:var(--bg);margin:0}body{overscroll-behavior-y:none;min-height:100dvh}button{font:inherit;color:inherit;cursor:pointer;-webkit-tap-highlight-color:transparent;touch-action:manipulation}a{color:var(--user)}h1,h2,h3{color:var(--ink-strong);margin:0 0 .6em;line-height:1.4}h1{font-size:1.5rem}h2{font-size:1.3rem}h3{font-size:1.1rem}p{margin:0 0 .8em}:focus-visible{outline:3px solid var(--user);outline-offset:2px}.screen{max-width:640px;margin:0 auto;padding:12px 16px 40px}.topbar{align-items:center;gap:8px;max-width:640px;min-height:56px;margin:0 auto;padding:4px 8px;display:flex}.topbar .title{text-align:center;color:var(--ink-strong);flex:1;font-size:1.05rem;font-weight:700}.topbar .side{min-width:5.5em;display:flex}.topbar .side.right{justify-content:flex-end}.back-btn{min-height:var(--tap);border:2px solid var(--line-thin);background:var(--paper);white-space:nowrap;border-radius:10px;padding:0 12px;font-weight:700}.clock{font-variant-numeric:tabular-nums;white-space:nowrap;font-size:1.05rem;font-weight:700}.btn{border-radius:var(--radius);border:2px solid var(--line);background:var(--paper);text-align:center;width:100%;min-height:3.2rem;color:var(--ink-strong);flex-direction:column;justify-content:center;align-items:center;padding:8px 16px;font-size:1.05rem;font-weight:700;line-height:1.35;text-decoration:none;display:flex}.btn .sub{color:var(--muted);font-size:.85rem;font-weight:400}.btn:active{transform:translateY(1px)}.btn.primary{background:var(--accent);border-color:var(--accent-dark);color:#fff;min-height:4.2rem;box-shadow:0 3px 0 var(--accent-dark);font-size:1.3rem}.btn.primary .sub{color:#fff;opacity:.95}.btn:disabled{opacity:.45;cursor:default}.stack{flex-direction:column;gap:14px;display:flex}.row{gap:10px;display:flex}.row>*{flex:1}.card{background:var(--paper);border-radius:var(--radius);border:1px solid #e3ddd0;padding:16px}.note{color:var(--muted);font-size:.9rem}.center{text-align:center}.greet{align-items:center;gap:12px;display:flex}.greet .face{flex:none;width:96px}.bubble{background:var(--paper);border:2px solid var(--line);color:var(--ink-strong);border-radius:16px;flex:1;padding:10px 14px;font-weight:700;position:relative}.bubble:before{content:"";border:8px solid #0000;border-right-color:var(--line);border-left:0;margin-top:-8px;position:absolute;top:50%;left:-10px}.play{flex-direction:column;align-items:center;min-height:100dvh;display:flex}.play .topbar{width:100%}.play-main{flex-direction:column;align-items:center;gap:10px;width:100%;display:flex}.board-wrap{width:min(100vw - 8px,max(300px,100dvh - 22rem),640px);container-type:inline-size}.board{background:var(--line);aspect-ratio:1;-webkit-user-select:none;user-select:none;grid-template-rows:repeat(3,minmax(0,1fr));grid-template-columns:repeat(3,minmax(0,1fr));gap:3px;padding:3px;display:grid}.box{background:var(--line-thin);grid-template-rows:repeat(3,minmax(0,1fr));grid-template-columns:repeat(3,minmax(0,1fr));gap:1px;display:grid}.cell{background:var(--paper);font-variant-numeric:tabular-nums;min-width:0;min-height:0;color:var(--user);border:0;border-radius:0;justify-content:center;align-items:center;margin:0;padding:0;font-size:7.6cqw;font-weight:500;line-height:1;display:flex;position:relative;overflow:hidden}.cell.given{color:var(--ink-strong);font-weight:800}.cell.peer{background:var(--peer)}.cell.same{background:var(--same)}.cell.related{background:#fff3c4}.cell.selected{box-shadow:inset 0 0 0 4px var(--accent);z-index:1}.cell.hint{background:var(--hint);z-index:2;animation:1.2s ease-in-out 3 hintPulse;box-shadow:inset 0 0 0 4px #c98a00}@keyframes hintPulse{50%{box-shadow:inset 0 0 0 7px #c98a00}}.cell.error .num{color:var(--error);text-underline-offset:.12em;text-decoration:underline;text-decoration-thickness:.09em}.memo{color:#6b6b6b;grid-template-rows:repeat(3,1fr);grid-template-columns:repeat(3,1fr);font-size:3cqw;font-weight:700;line-height:1;display:grid;position:absolute;inset:4%}.memo span{justify-content:center;align-items:center;display:flex}.pad,.actions{gap:8px;width:min(100vw - 8px,640px);display:grid}.pad{grid-template-columns:repeat(10,1fr)}.pad .num-btn{border:2px solid var(--line);background:var(--paper);min-height:max(56px,3.1rem);color:var(--ink-strong);font-variant-numeric:tabular-nums;border-radius:10px;grid-column:span 2;font-size:1.6rem;font-weight:700}.pad .num-btn:nth-child(6){grid-column:2/span 2}.pad.memo-on .num-btn{color:#5b5b5b;border-style:dashed}.pad .num-btn.used{opacity:.3}.actions{grid-template-columns:repeat(5,1fr);gap:6px}.act-btn{min-height:var(--tap);border:2px solid var(--line-thin);background:var(--paper);border-radius:10px;flex-direction:column;justify-content:center;align-items:center;padding:4px 2px;font-size:min(.95rem,4.8vw);font-weight:700;line-height:1.2;display:flex}.act-btn small{color:var(--muted);font-size:.72rem;font-weight:400}.act-btn.on{background:var(--accent-soft);border-color:var(--accent);color:var(--accent-dark)}.act-btn:disabled{opacity:.4}.hint-box{white-space:pre-line;width:min(100vw - 16px,640px);color:var(--ink-strong);background:#fff8d6;border:2px solid #c98a00;border-radius:12px;padding:10px 14px;font-weight:700}.hint-box .row{margin-top:8px}.notice{background:var(--paper);border:2px solid var(--line-thin);border-radius:12px;width:min(100vw - 16px,640px);padding:10px 14px;font-weight:700}.under-play{gap:10px;width:min(100vw - 16px,640px);margin:6px 0 24px;display:flex}.under-play .btn{min-height:var(--tap);border-color:var(--line-thin);font-size:.95rem}@media (orientation:landscape) and (max-height:600px){.play-main{flex-direction:row;justify-content:center;align-items:flex-start;gap:16px;padding:0 12px}.board-wrap{width:min(100dvh - 76px,60vw)}.controls{flex-direction:column;flex:1;gap:10px;max-width:420px;display:flex}.pad,.actions,.hint-box,.notice,.under-play{width:100%}}@media not ((orientation:landscape) and (max-height:600px)){.controls{display:contents}}.done{text-align:center}.done .chara{width:160px;margin:8px auto 0}.done .big{color:var(--ink-strong);margin:8px 0 12px;font-size:1.5rem;font-weight:800}.stat-list{grid-template-columns:auto auto;justify-content:center;gap:4px 20px;margin:0 0 20px;font-size:1.1rem;display:grid}.stat-list dt{color:var(--muted)}.stat-list dd{text-align:left;margin:0;font-weight:800}.big-num{color:var(--ink-strong);font-size:2.2rem;font-weight:800;line-height:1.2}table.simple{border-collapse:collapse;width:100%}table.simple th,table.simple td{text-align:left;border-bottom:1px solid #ddd5c5;padding:8px 4px}table.simple td.num,table.simple th.num{text-align:right;font-variant-numeric:tabular-nums}.setting{margin-bottom:22px}.setting h3{margin-bottom:8px}.seg{gap:8px;display:flex}.seg button{min-height:var(--tap);border:2px solid var(--line-thin);background:var(--paper);border-radius:10px;flex:1;font-weight:700}.seg button[aria-pressed=true]{border-color:var(--accent);background:var(--accent-soft);color:var(--accent-dark)}.seg button[aria-pressed=true]:before{content:"✓ "}.guide-fig{width:100%;max-width:360px;margin:8px auto 16px;display:block}.steps{margin:0 0 1em;padding-left:1.4em}.steps li{margin-bottom:.6em}.dots{justify-content:center;gap:8px;margin:8px 0 16px;display:flex}.dots span{background:#d5cdbd;border-radius:50%;width:12px;height:12px}.dots span.on{background:var(--accent)}.foot{text-align:center;color:var(--muted);margin-top:28px;font-size:.85rem}.foot a{color:var(--muted)}.print-only{display:none}@media print{@page{size:A4 portrait;margin:12mm}:root,html,body{font-size:12pt;background:#fff!important}.screen-only{display:none!important}.print-only{display:block}}.sheet{page-break-after:always;break-after:page;color:#000;font-family:Hiragino Sans,Noto Sans JP,sans-serif}.sheet:last-child{page-break-after:auto;break-after:auto}.sheet .ph{border-bottom:1.5pt solid #000;justify-content:space-between;align-items:baseline;margin-bottom:6mm;padding-bottom:2mm;font-size:14pt;font-weight:700;display:flex}.sheet .pf{color:#444;text-align:center;margin-top:6mm;font-size:9pt}.pgrid{border-collapse:collapse;border:3pt solid #000;margin:0 auto}.pgrid td{text-align:center;vertical-align:middle;border:.8pt solid #555;padding:0;font-family:Hiragino Sans,Helvetica Neue,Arial,sans-serif;font-weight:800}.pgrid td.bl{border-left:2.4pt solid #000}.pgrid td.bt{border-top:2.4pt solid #000}.pgrid.large td{width:18.8mm;height:18.8mm;font-size:30pt}.pgrid.medium td{width:12.6mm;height:12.6mm;font-size:20pt}.pgrid.small td{width:7mm;height:7mm;font-size:11pt;font-weight:400}.pgrid.small td.g{font-weight:800}.answers{grid-template-columns:repeat(2,auto);justify-content:center;gap:8mm 12mm;display:grid}.answers .cap{margin-bottom:1mm;font-size:10pt}.two-up .pblock+.pblock{margin-top:10mm}.two-up .ph{margin-bottom:3mm}@media (prefers-reduced-motion:reduce){*,:before,:after{transition:none!important;animation:none!important}}