:root{--bg:#0c0c18;--text:#d4c8a0;--text-muted:#8a7e60;--tile-light:#c8b98a;--tile-dark:#5c4033;--accent-gold:#d4a843;--accent-teal:#2d8a6e;--btn-bg:#2a2a40;--btn-border:#b4a0644d;--danger:#dc2626;--success:#22c55e;--board-size:min(100vw - 32px, 520px);color:var(--text);background:var(--bg);--lightningcss-light: ;--lightningcss-dark:initial;color-scheme:dark;font-synthesis:none;text-rendering:optimizelegibility;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;font:16px/1.45 system-ui,Segoe UI,Roboto,sans-serif}*,:before,:after{box-sizing:border-box}body{margin:0}#root{flex-direction:column;align-items:center;min-height:100svh;display:flex}h1,h2{color:var(--text);margin:0;font-weight:500}p{margin:0}.app-root{width:var(--board-size);flex-direction:column;align-items:center;gap:12px;margin:0 auto;padding:16px 0 32px;display:flex}.app-header{text-align:right;width:100%}.app-header h1{letter-spacing:-1px;margin:0 0 4px;font-size:42px}.board{width:var(--board-size);height:var(--board-size);border-radius:8px;position:relative;overflow:visible}.tile{cursor:pointer;transform-origin:50%;background:0 0;border:none;border-radius:3px;justify-content:center;align-items:center;padding:0;transition:transform .6s cubic-bezier(.4,0,.2,1);display:flex;position:absolute;top:0;left:0}.tile.light:before,.tile.dark:before{content:"";background:var(--tile-light);border-radius:3px;position:absolute;inset:0}.tile.dark:before{background:var(--tile-dark)}.tile.selected:before{outline:3px solid var(--accent-gold);outline-offset:-3px}.tile.target:before{box-shadow:inset 0 0 0 4px var(--accent-teal)}.tile.last-from:before{background:#648cdc73}.tile.last-to:before{background:#648cdc8c;box-shadow:inset 0 0 0 2px #8cb4ff99}.tile.checked-king:before{box-shadow:inset 0 0 0 4px var(--danger), 0 0 16px #dc262699}.tile.checking-piece:before{box-shadow:inset 0 0 0 4px var(--success), 0 0 16px #22c55e80}.tile.mated-king:before,.tile.mating-piece:before{box-shadow:inset 0 0 0 4px var(--danger), 0 0 16px #dc262699}.tile.threatened:before{background:rgba(220, 38, 38, calc(.08 * var(--threat-n,1)))}.tile.threatening-piece:before{box-shadow:inset 0 0 0 3px #dc2626e6,0 0 12px #dc262680}.support-overlay{pointer-events:none;position:absolute;top:0;left:0}.support-arrow{stroke:var(--support-stroke,#14b8a6);stroke-width:1.8px;fill:none;opacity:.85}.support-arrow-hover{stroke:var(--support-hover-stroke,#ea580c)}.piece{font-size:calc(var(--board-size) / 9);filter:drop-shadow(0 1px 3px #000000b3);pointer-events:none;line-height:1;transition:transform .6s cubic-bezier(.4,0,.2,1);position:relative}.piece-white{color:#f0e8d0;text-shadow:0 0 2px #0009}.piece-black{color:#1a1008;text-shadow:0 0 2px #c8b98ae6,0 0 8px #c8b98a99}.board.previewing{outline:2px dashed var(--text-muted);outline-offset:4px;border-radius:8px}.board.previewing .tile,.board.previewing .piece{transition:transform .3s cubic-bezier(.4,0,.2,1)}.game-over-banner{text-align:center;width:100%;color:var(--accent-gold);padding:8px 0;font-size:18px;font-weight:700}.board-actions{justify-content:space-between;align-items:center;gap:6px;width:100%;display:flex}.action-group{align-items:center;gap:6px;display:flex}.action-group-reset-lock{gap:0}.action-group-reset-lock .action-btn:first-child{border-top-right-radius:0;border-bottom-right-radius:0}.action-group-reset-lock .action-btn:last-child{border-top-left-radius:0;border-bottom-left-radius:0}.action-group-support-threat{gap:0}.action-group-support-threat .action-btn:first-child{border-top-right-radius:0;border-bottom-right-radius:0}.action-group-support-threat .action-btn:last-child{border-top-left-radius:0;border-bottom-left-radius:0}.material-score-wrap{align-items:center;display:flex;position:relative}.material-score{font-variant-numeric:tabular-nums;text-align:center;cursor:default;min-width:4em;font-size:18px;font-weight:700}.material-score.positive{color:#7dd87d}.material-score.negative{color:#e88}.material-score.zero{color:var(--text-muted,#888)}.material-score-popup{z-index:20;background:var(--popup-bg,#2a2a35);border:1px solid var(--btn-border,#555);font-variant-numeric:tabular-nums;border-radius:8px;min-width:200px;padding:10px 12px;font-size:12px;position:absolute;top:100%;left:50%;transform:translate(-50%)translateY(6px);box-shadow:0 4px 12px #0006}.material-captured-section{margin-bottom:8px}.material-captured-section:last-child{margin-bottom:0}.material-captured-label{color:var(--text);margin-bottom:4px;font-weight:700}.material-captured-list{color:var(--text-muted,#aaa)}.material-captured-total{color:var(--text);font-weight:700}.action-btn{border:2px solid var(--btn-border);background:var(--btn-bg);width:40px;height:40px;color:var(--text);cursor:pointer;border-radius:8px;justify-content:center;align-items:center;font-size:18px;transition:background .15s ease-out,transform .15s ease-out;display:flex}.action-btn:hover{background:#3a3a55;transform:translateY(-1px)}.action-btn:active{transform:translateY(0)}.action-btn:disabled{opacity:.35;cursor:default;transform:none}.action-btn.preview-btn{border-style:dashed}.action-btn.active{color:#f88;background:#dc26264d;border-color:#dc262699}.rotate-btn{border:2px solid var(--btn-border);background:var(--btn-bg);height:40px;color:var(--text);cursor:pointer;border-radius:8px;padding:0 18px;font-size:14px;font-weight:600;transition:background .15s ease-out,transform .15s ease-out}.rotate-btn:hover{background:#3a3a55;transform:translateY(-1px)}.rotate-btn:active{transform:translateY(0)}.rotate-btn:disabled{opacity:.35;cursor:default;transform:none}.position-label-wrap{flex-wrap:wrap;justify-content:center;align-items:center;gap:8px;width:100%;display:flex}.position-label{color:var(--text-muted);letter-spacing:2px;font-family:ui-monospace,Menlo,Consolas,monospace;font-size:1em}.position-label-wrap .position-label{font-size:16px}.position-edit-btn{border:1px solid var(--btn-border);background:var(--btn-bg);color:var(--text-muted);cursor:pointer;border-radius:4px;padding:2px 6px;font-size:11px}.position-edit-btn:hover{color:var(--text)}.position-replay-btn{border:1px solid var(--btn-border);background:var(--btn-bg);color:var(--text-muted);cursor:pointer;border-radius:4px;padding:2px 8px;font-size:11px}.position-replay-btn:hover{color:var(--text)}.replay-textarea{box-sizing:border-box;border:1px solid var(--btn-border);width:100%;color:var(--text);resize:vertical;background:#00000040;border-radius:8px;padding:10px 12px;font-family:ui-monospace,monospace;font-size:12px;line-height:1.45}.replay-error{color:#fca5a5;margin-top:8px;font-size:12px}.replay-actions{gap:8px;margin-top:12px;display:flex}.position-input-wrap{align-items:center;gap:6px;display:inline-flex}.position-input{letter-spacing:1px;border:1px solid var(--btn-border);background:var(--bg);width:100px;color:var(--text);border-radius:6px;padding:4px 8px;font-family:ui-monospace,Menlo,Consolas,monospace;font-size:14px}.position-input-error{color:var(--danger);font-size:11px}.move-log-details{border:1px solid var(--btn-border);background:var(--btn-bg);border-radius:8px;width:100%;overflow:hidden}.move-log-details summary{color:var(--text-muted);cursor:pointer;-webkit-user-select:none;user-select:none;padding:8px 14px;font-size:13px;font-weight:600;list-style:none}.move-log-details summary::-webkit-details-marker{display:none}.move-log-details summary:before{content:"▶";margin-right:8px;font-size:10px;transition:transform .2s;display:inline-block}.move-log-details[open] summary:before{transform:rotate(90deg)}.move-log-content{padding:0 14px 10px}.move-log-text{max-height:200px;color:var(--text);white-space:pre-wrap;word-break:break-all;background:#00000040;border-radius:4px;margin:0;padding:8px;font-family:ui-monospace,Menlo,Consolas,monospace;font-size:12px;line-height:1.6;overflow-y:auto}.copy-btn{border:1px solid var(--btn-border);color:var(--text-muted);cursor:pointer;background:0 0;border-radius:4px;margin-top:6px;padding:4px 12px;font-size:12px;transition:color .15s}.copy-btn:hover{color:var(--text)}.memory-details{border:1px solid var(--btn-border);background:var(--btn-bg);border-radius:8px;width:100%;overflow:hidden}.memory-details summary{color:var(--text-muted);cursor:pointer;-webkit-user-select:none;user-select:none;padding:8px 14px;font-size:13px;font-weight:600;list-style:none}.memory-details summary::-webkit-details-marker{display:none}.memory-details summary:before{content:"▶";margin-right:8px;font-size:10px;transition:transform .2s;display:inline-block}.memory-details[open] summary:before{transform:rotate(90deg)}.memory-content{padding:0 14px 14px}.memory-toolbar{flex-wrap:wrap;align-items:center;gap:8px;margin-bottom:12px;display:flex}.memory-sort-select{border:1px solid var(--btn-border);background:var(--btn-bg);color:var(--text);border-radius:4px;padding:4px 8px;font-size:12px}.memory-sort-dir{border:1px solid var(--btn-border);background:var(--btn-bg);color:var(--text-muted);cursor:pointer;border-radius:4px;padding:4px 8px;font-size:12px}.memory-filter-input{border:1px solid var(--btn-border);min-width:100px;color:var(--text);background:#00000040;border-radius:4px;flex:1;padding:4px 8px;font-size:12px}.memory-filter-clear,.memory-refresh-btn{border:1px solid var(--btn-border);color:var(--text-muted);cursor:pointer;background:0 0;border-radius:4px;padding:4px 10px;font-size:12px}.memory-filter-clear:hover,.memory-refresh-btn:hover{color:var(--text)}.memory-list{flex-direction:column;gap:8px;max-height:60vh;display:flex;overflow-y:auto}.memory-game-row{cursor:default}.memory-empty{text-align:center;color:var(--text-muted);padding:24px;font-size:13px}.memory-game-card{border:1px solid var(--btn-border);background:#0003;border-radius:6px;overflow:hidden}.memory-game-card summary{cursor:pointer;align-items:center;gap:8px;padding:8px 12px;font-size:12px;display:flex}.memory-game-summary-left{flex-wrap:wrap;flex:0 auto;align-items:center;gap:8px;min-width:0;display:flex}.memory-game-sparkline-inline{flex:1 0;min-width:60px;max-width:180px;height:20px;margin-left:auto}.memory-game-sparkline-inline svg{width:100%;height:100%;display:block}.memory-game-card summary::-webkit-details-marker{display:none}.memory-game-card summary:before{content:"▶";margin-right:6px;font-size:9px;transition:transform .2s;display:inline-block}.memory-game-card[open] summary:before{transform:rotate(90deg)}.memory-game-date{color:var(--text-muted)}.memory-game-result{border-radius:4px;padding:2px 6px;font-weight:600}.memory-game-result-win{color:#7dd87d;background:#7dd87d26}.memory-game-result-loss{color:#e88;background:#ee888826}.memory-game-result-draw{color:var(--text-muted)}.memory-game-result-incomplete{color:#f2d37a;background:#f2d37a26}.memory-game-config{font-family:ui-monospace,monospace}.memory-game-moves{color:var(--text-muted)}.memory-game-content{padding:0 12px 12px}.memory-game-expanded-grid{grid-template-columns:auto 1fr;align-items:start;gap:16px;display:grid}.memory-game-stats-column{flex-direction:column;gap:8px;min-width:0;display:flex}.memory-game-summary{color:var(--text-muted);font-size:12px}.memory-game-piece-histogram{color:var(--text-muted);margin-top:6px;font-size:11px}.memory-piece-hist-row{gap:6px;margin-top:2px;display:flex}.memory-piece-hist-row:first-child{margin-top:0}.memory-piece-hist-label{flex-shrink:0;min-width:42px;font-weight:600}.memory-piece-hist-bars{white-space:nowrap}.memory-game-moves-ab{margin-top:4px;font-size:11px}.memory-heatmap-wrap{flex-shrink:0}.memory-sparkline-wrap{flex:1;min-width:0}.memory-heatmap-label,.memory-sparkline-label{color:var(--text-muted);margin-bottom:4px;font-size:11px}.memory-heatmaps-row{align-items:flex-start;gap:8px;display:flex}.memory-heatmap-block{flex-direction:column;align-items:flex-start;gap:2px;display:flex}.memory-heatmap-sublabel{color:var(--text-muted);font-size:10px;font-weight:600}.memory-heatmap{aspect-ratio:1;grid-template-rows:repeat(8,1fr);grid-template-columns:repeat(8,1fr);width:100%;max-width:160px;display:grid}.memory-heatmap-cell{aspect-ratio:1;justify-content:center;align-items:center;width:100%;display:flex;position:relative}.memory-heatmap-letter{color:#fffffff2;text-shadow:0 0 1px #000c,0 1px 2px #0009;pointer-events:none;font-size:9px;font-weight:700}.memory-heatmap-cell.light{background:rgba(100, 140, 220, calc(.15 + .5 * var(--heat,0)))}.memory-heatmap-cell.dark{background:rgba(60, 100, 180, calc(.2 + .5 * var(--heat,0)))}.memory-heatmap-cell-b.light{background:rgba(200, 140, 60, calc(.2 + .5 * var(--heat,0)))}.memory-heatmap-cell-b.dark{background:rgba(180, 120, 40, calc(.25 + .5 * var(--heat,0)))}.memory-sparkline{width:100%;height:40px;min-height:32px}.memory-moves-details{border-top:1px solid var(--btn-border);margin-top:8px;padding-top:8px}.memory-moves-details summary{cursor:pointer;padding:4px 0;font-size:12px}.memory-moves-details summary::-webkit-details-marker{display:none}.memory-moves-details summary:before{content:"▶";margin-right:6px;font-size:9px;transition:transform .2s;display:inline-block}.memory-moves-details[open] summary:before{transform:rotate(90deg)}.memory-moves-content{margin-top:6px}.memory-moves-text{max-height:150px;color:var(--text);white-space:pre-wrap;word-break:break-all;background:#00000040;border-radius:4px;margin:0;padding:8px;font-family:ui-monospace,monospace;font-size:11px;line-height:1.5;overflow-y:auto}.help-backdrop{z-index:100;background:#000000b3;justify-content:center;align-items:center;padding:16px;display:flex;position:fixed;inset:0}.help-dialog{border:1px solid var(--btn-border);width:100%;max-width:480px;max-height:80vh;color:var(--text);background:#161626;border-radius:12px;padding:24px;overflow-y:auto}.help-dialog h2{margin-bottom:12px;font-size:22px}.help-dialog p{margin-bottom:10px;font-size:14px;line-height:1.6}.help-dialog a{color:var(--accent-gold)}.help-dialog ul{margin:0 0 12px;padding-left:20px;font-size:14px;line-height:1.7}.help-close-btn{border:1px solid var(--btn-border);background:var(--btn-bg);color:var(--text);cursor:pointer;border-radius:6px;margin-top:8px;padding:8px 20px;font-size:14px;font-weight:600;transition:background .15s}.help-close-btn:hover{background:#3a3a55}.promotion-backdrop{z-index:200;background:#0009;justify-content:center;align-items:center;display:flex;position:fixed;inset:0}.promotion-dialog{border:1px solid var(--btn-border);text-align:center;background:#161626;border-radius:12px;padding:16px 20px}.promotion-title{color:var(--text);margin-bottom:12px;font-size:14px;font-weight:600}.promotion-options{gap:8px;display:flex}.promotion-option{border:1px solid var(--btn-border);background:var(--btn-bg);cursor:pointer;border-radius:8px;justify-content:center;align-items:center;width:56px;height:56px;font-size:32px;transition:background .15s,border-color .15s;display:flex}.promotion-option:hover{border-color:var(--accent-gold);background:#3a3a55}.mode-toggle{vertical-align:middle;gap:4px;margin-left:16px;display:inline-flex}.mode-btn{background:var(--btn-bg);color:var(--text);border:1px solid var(--btn-border);cursor:pointer;border-radius:6px;padding:4px 12px;font-size:12px;font-weight:600;transition:background .15s,border-color .15s}.mode-btn:hover{background:#3a3a55}.mode-btn-active{background:var(--accent-gold);color:#161626;border-color:var(--accent-gold)}.roulette-panel{max-width:var(--board-size);border:1px solid var(--btn-border);background:#161626;border-radius:8px;justify-content:space-between;align-items:center;gap:12px;margin:8px auto;padding:10px 14px;display:flex}.roulette-display{align-items:center;gap:8px;min-height:44px;display:flex}.roulette-face{background:var(--tile-light);border:1px solid var(--btn-border);border-radius:6px;justify-content:center;align-items:center;width:48px;height:48px;display:inline-flex}.roulette-face .piece{pointer-events:none;font-size:36px;line-height:1}.roulette-face-rolling{background:var(--btn-bg);color:var(--accent-gold);font-size:28px;font-weight:700;animation:.4s infinite alternate roulette-roll}.roulette-face.slot-used{opacity:.35;filter:grayscale()}.roulette-actions{color:var(--text);opacity:.85;align-items:center;gap:6px;font-size:12px;display:inline-flex}.roulette-actions-label{letter-spacing:.5px;font-weight:600}.roulette-action-dot{border:1px solid var(--btn-border);border-radius:50%;width:12px;height:12px;display:inline-block}.roulette-action-dot.active{background:var(--accent-gold);border-color:var(--accent-gold);box-shadow:0 0 6px #c8b98a99}.roulette-action-dot.spent{opacity:.5;background:0 0}@keyframes roulette-roll{0%{transform:translateY(0)}to{transform:translateY(-4px)}}.roulette-label{color:var(--text);opacity:.75;font-size:13px}.roulette-spin-btn{background:var(--accent-gold);color:#161626;cursor:pointer;border:none;border-radius:6px;padding:8px 18px;font-size:13px;font-weight:600;transition:opacity .15s}.roulette-spin-btn:disabled{opacity:.4;cursor:not-allowed}