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h1{min-width:0;font-size:1.4rem;margin:0}.mem-hud{display:flex;justify-content:space-around;font-weight:600;padding:8px 0}.mem-hud-stat{font-size:.95rem}.mem-controls{display:flex;gap:8px;justify-content:center;flex-wrap:wrap}.mem-diff-btn{padding:6px 16px;border-radius:8px;border:2px solid var(--border);background:var(--card);color:var(--text);font-size:.85rem;cursor:pointer;transition:border-color .1s}.mem-diff-btn.selected{border-color:var(--blue);background:var(--blue);color:#fff}.mem-board{display:grid;gap:8px}.mem-card{aspect-ratio:1;perspective:600px;border:none;background:transparent;padding:0;cursor:pointer}.mem-card-inner{position:relative;width:100%;height:100%;transform-style:preserve-3d;transition:transform .3s}.mem-card.flipped .mem-card-inner{transform:rotateY(180deg)}.mem-card-front,.mem-card-back{position:absolute;inset:0;backface-visibility:hidden;display:flex;align-items:center;justify-content:center;border-radius:10px;font-weight:700}.mem-card-front{background:var(--blue);color:#fff;font-size:1.5rem}.mem-card-back{background:var(--card);border:2px solid var(--border);transform:rotateY(180deg)}.mem-card.matched .mem-card-back{background:#22c55e33;border-color:var(--green)}.mem-expr{font-size:1rem}.mem-answer{font-size:1.4rem}.mem-result{position:fixed;inset:0;background:#0009;display:flex;align-items:center;justify-content:center;z-index:100}.mem-result-card{text-align:center;background:var(--bg);border-radius:16px;padding:32px 40px}.mem-result-card h2{margin:0 0 8px}.mem-stars{font-size:2rem;margin:8px 0}.mem-start-btn{padding:12px 32px;border-radius:10px;border:none;background:var(--blue);color:#fff;font-weight:700;font-size:1rem;cursor:pointer}.mem-nav{display:flex;justify-content:center;gap:16px;padding:12px 0;font-size:.85rem}.mem-nav a{color:var(--text-dim);text-decoration:none}.mem-nav a:hover{color:var(--text)}.kk-shell{max-width:500px;margin:0 auto;padding:16px;min-height:100vh;display:flex;flex-direction:column;gap:12px}.kk-controls{display:flex;gap:8px;justify-content:center;flex-wrap:wrap}.kk-size-switch,.kk-diff-switch{display:flex;gap:4px}.kk-size-switch button,.kk-diff-switch button{padding:6px 12px;border-radius:8px;border:2px solid var(--line);background:var(--surface-strong);color:var(--ink);font-size:.85rem;cursor:pointer}.kk-size-switch button.selected,.kk-diff-switch button.selected{border-color:var(--blue);background:var(--blue);color:#fff}.kk-info{display:flex;justify-content:space-between;align-items:center;font-weight:600;font-size:.9rem}.kk-info button{padding:4px 12px;border-radius:6px;border:2px solid var(--line);background:var(--surface-strong);color:var(--ink);cursor:pointer}.kk-board-wrap{display:flex;justify-content:center}.kk-board{display:grid;gap:0;background:var(--surface-strong);border:2px solid var(--kenken-cage-line);border-radius:8px;aspect-ratio:1;width:100%;max-width:400px}.kk-cell{position:relative;display:flex;align-items:center;justify-content:center;border:1px solid var(--kenken-line);background:var(--surface-strong);font-size:1.4rem;font-weight:600;cursor:pointer;min-height:0;transition:background .1s}.kk-cell.given{background:var(--paper);color:var(--muted)}.kk-cell.selected{background:#3b82f640}.kk-cell.related{background:#3b82f614}.kk-cell.error{background:#ef444433}.kk-cell.same-value{background:#22c55e1f}.kk-border-top{border-top:2px solid var(--kenken-cage-line)}.kk-border-bottom{border-bottom:2px solid var(--kenken-cage-line)}.kk-border-left{border-left:2px solid var(--kenken-cage-line)}.kk-border-right{border-right:2px solid var(--kenken-cage-line)}.kk-cage-label{position:absolute;top:2px;left:3px;font-size:.65rem;font-weight:700;color:var(--ink)}.kk-value{font-size:1.4rem}.kk-number-pad{display:flex;flex-wrap:wrap;gap:6px;justify-content:center}.kk-number-pad button{flex:1;min-width:40px;max-width:60px;padding:12px;border-radius:10px;border:2px solid var(--line);background:var(--surface-strong);color:var(--ink);font-size:1.2rem;font-weight:700;cursor:pointer}.kk-number-pad button:hover:not(:disabled){border-color:var(--blue)}.kk-number-pad button:disabled{opacity:.4}.kk-action-row{display:flex;justify-content:center}.kk-action-row button{padding:8px 20px;border-radius:8px;border:2px solid var(--line);background:var(--surface-strong);color:var(--gold-ink);cursor:pointer}.kk-action-row button:disabled{opacity:.4}.kk-solved-banner{text-align:center;padding:16px;background:#22c55e26;border-radius:12px}.kk-solved-banner button{margin-left:12px;padding:6px 16px;border-radius:8px;border:none;background:var(--green);color:#fff;cursor:pointer}.kk-nav{display:flex;justify-content:center;gap:16px;padding:12px 0;font-size:.85rem}.kk-nav a{color:var(--muted);text-decoration:none}.kk-nav a:hover{color:var(--ink)}.kk-toast{position:fixed;bottom:20px;left:50%;transform:translate(-50%);padding:10px 20px;border-radius:10px;font-weight:600;z-index:200;animation:kk-slide-up .3s}@keyframes kk-slide-up{0%{opacity:0;transform:translate(-50%) translateY(10px)}to{opacity:1;transform:translate(-50%) translateY(0)}}.kk-toast-info{background:var(--blue);color:#fff}.kk-toast-success{background:var(--green);color:#fff}