:root{--panel-bg: rgba(16, 20, 24, .88);--panel-border: #2b3640;--text: #d8e2ea;--text-dim: #8b9aa8;--accent: #7fd06a;--accent-2: #ffcc4d;--danger: #ff6b5a;--mono: ui-monospace, SFMono-Regular, Menlo, Consolas, "DejaVu Sans Mono", monospace}*{box-sizing:border-box}html,body{margin:0;padding:0;height:100%;overflow:hidden;background:#0b0e11;color:var(--text);font-family:var(--mono);font-size:13px;-webkit-font-smoothing:antialiased;-webkit-tap-highlight-color:transparent}#app{position:fixed;inset:0}#viewport{display:block;width:100%;height:100%;touch-action:none;outline:none}#file-input{display:none}button{font-family:var(--mono);font-size:12px;color:var(--text);background:#181e24e6;border:1px solid var(--panel-border);padding:5px 8px;min-width:28px;cursor:pointer;user-select:none;white-space:nowrap}button:hover{border-color:var(--accent)}button:active{transform:translateY(1px)}button.active{background:var(--accent);border-color:var(--accent);color:#0b0e11;font-weight:700}button:disabled{opacity:.35;cursor:not-allowed}button:disabled:hover{border-color:var(--panel-border)}input[type=search],select{font-family:var(--mono);font-size:12px;color:var(--text);background:#0a0d10e6;border:1px solid var(--panel-border);padding:5px 6px;width:100%}input[type=search]:focus,select:focus{outline:none;border-color:var(--accent)}.sep{width:1px;align-self:stretch;background:var(--panel-border);margin:0 3px}#topbar{position:absolute;top:0;left:0;right:0;display:flex;align-items:center;flex-wrap:wrap;gap:6px;padding:7px 9px;padding-top:max(7px,env(safe-area-inset-top));background:linear-gradient(180deg,#0b0e11f2,#0b0e1100);pointer-events:none;z-index:10}#topbar .brand{display:flex;align-items:center;gap:6px;font-weight:700;letter-spacing:.5px}#topbar .brand .dot{width:10px;height:10px;background:var(--accent);border:1px solid #0b0e11;transform:rotate(45deg)}#topbar .brand .tag{font-size:11px;color:var(--accent-2);border:1px solid var(--accent-2);padding:0 4px;line-height:15px}#topbar .spacer{flex:1}#topbar .group{display:flex;align-items:center;gap:4px;pointer-events:auto}#main-toolbar{flex-wrap:wrap}.panel{background:var(--panel-bg);border:1px solid var(--panel-border);padding:8px 9px;font-size:12px;backdrop-filter:blur(2px)}.panel.collapsed{display:none}.panel summary{cursor:pointer;font-weight:700;color:var(--accent);padding-bottom:4px}.panel h4{margin:10px 0 5px;font-size:11px;color:var(--text-dim);font-weight:400}#brush-panel{position:absolute;left:9px;top:62px;width:232px;max-height:calc(100vh - 130px);overflow-y:auto;z-index:8}#right-stack{position:absolute;right:9px;top:62px;width:320px;max-height:calc(100vh - 130px);overflow-y:auto;display:flex;flex-direction:column;gap:8px;z-index:8}#right-stack .panel{position:static}.panel::-webkit-scrollbar,#right-stack::-webkit-scrollbar{width:6px}.panel::-webkit-scrollbar-thumb,#right-stack::-webkit-scrollbar-thumb{background:#33404a}.button-grid{display:grid;gap:4px}.button-grid.cols-2{grid-template-columns:1fr 1fr}.button-grid.cols-3{grid-template-columns:1fr 1fr 1fr}.button-grid.cols-4{grid-template-columns:1fr 1fr 1fr 1fr}.material-grid{display:grid;grid-template-columns:1fr 1fr;gap:4px}.material-grid button{display:flex;align-items:center;gap:5px;padding:3px 5px;font-size:11px;overflow:hidden}.material-grid .swatch{width:11px;height:11px;flex:0 0 auto;border:1px solid rgba(0,0,0,.5)}.material-grid .label{overflow:hidden;text-overflow:ellipsis}.brush-summary{margin:10px 0 0;padding-top:8px;border-top:1px dashed var(--panel-border);color:var(--accent-2)}.slider{display:block;margin:9px 0 0}.slider>span{display:block;margin-bottom:3px;color:var(--text-dim);font-size:11px}.slider b{color:var(--accent)}.slider input[type=range]{width:100%;height:18px;accent-color:var(--accent);background:transparent}.tab-row{display:flex;flex-wrap:wrap;gap:3px;margin:6px 0}.tab-row button{font-size:11px;padding:3px 6px}.item-grid{display:grid;grid-template-columns:1fr 1fr;gap:5px;max-height:52vh;overflow-y:auto}.item-grid .scroll-sentinel{grid-column:1 / -1;height:1px}.item-grid .empty{grid-column:1 / -1;color:var(--text-dim);margin:6px 0}.item-card{display:flex;align-items:center;gap:6px;padding:5px;text-align:left;overflow:hidden}.item-card .thumb{width:26px;height:26px;flex:0 0 auto;display:flex;align-items:center;justify-content:center;font-size:15px;border:1px solid rgba(0,0,0,.5)}.item-card .meta{display:flex;flex-direction:column;overflow:hidden}.item-card .meta b{font-size:11px;overflow:hidden;text-overflow:ellipsis}.item-card .meta small{color:var(--text-dim);font-size:10px}.pager{display:flex;align-items:center;justify-content:space-between;gap:6px;margin:7px 0}.pager .page-info{color:var(--text-dim);font-size:11px}.detail-box{background:#0a0d10b3;border:1px solid var(--panel-border);padding:6px 7px;margin-bottom:6px;line-height:1.5;color:var(--text-dim);font-size:11px}.detail-box b{color:var(--text)}.inline-label{margin:6px 0 0;font-size:11px;line-height:1.4}.inline-label.dim{color:var(--text-dim)}.row{display:flex;gap:6px;margin-top:6px}.row>.mini{flex:1;font-size:11px;color:var(--text-dim)}.row>.mini select{margin-top:3px}.switches{display:flex;flex-direction:column;gap:5px;margin:6px 0}.switches.compact{gap:3px}.switches label{display:flex;align-items:center;gap:6px;color:var(--text-dim);cursor:pointer}.switches input[type=checkbox]{accent-color:var(--accent);width:14px;height:14px}.stats{display:grid;grid-template-columns:auto 1fr;gap:2px 8px;margin:6px 0 0}.stats dt{color:var(--text-dim);font-size:11px}.stats dd{margin:0;color:var(--accent);text-align:right;font-size:11px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.legend{display:flex;flex-wrap:wrap;gap:4px}.legend-chip{display:inline-flex;align-items:center;gap:4px;font-size:10px;color:var(--text-dim);border:1px solid var(--panel-border);padding:1px 4px}.legend-chip i{width:9px;height:9px;display:inline-block;border:1px solid rgba(0,0,0,.5)}#brush-status{position:absolute;left:0;right:0;bottom:30px;display:flex;flex-wrap:wrap;gap:4px 12px;padding:5px 10px;color:var(--text-dim);font-size:12px;pointer-events:none;background:linear-gradient(180deg,#0b0e1100,#0b0e11a6)}#brush-status b{color:var(--accent-2);font-weight:700}#brush-status .hint{color:#6f7d8a;font-size:11px}#statusbar{position:absolute;left:0;right:0;bottom:0;display:flex;flex-wrap:wrap;gap:4px 12px;padding:5px 10px;background:#0b0e11e0;color:var(--text-dim);font-size:12px;padding-bottom:max(5px,env(safe-area-inset-bottom));pointer-events:none}#statusbar .stat b{color:var(--accent);font-weight:700}#toast{position:absolute;left:50%;bottom:88px;transform:translate(-50%,8px);max-width:84vw;padding:8px 14px;background:#0b0e11f5;border:1px solid var(--accent);color:var(--text);font-size:12px;line-height:1.5;opacity:0;pointer-events:none;transition:opacity .18s ease,transform .18s ease;z-index:40}#toast.visible{opacity:1;transform:translate(-50%)}#main-menu{position:absolute;inset:0;z-index:50;display:none;align-items:flex-start;justify-content:center;padding:3vh 12px;overflow-y:auto;background:#06090cd1;backdrop-filter:blur(3px)}#main-menu.visible{display:flex}.menu-card{width:min(860px,100%);background:#101418f7;border:1px solid var(--panel-border);padding:16px 18px 14px}.menu-header h2{margin:0 0 4px;font-size:17px;color:var(--accent)}.menu-header h2 small{font-size:11px;color:var(--accent-2);border:1px solid var(--accent-2);padding:0 4px;margin-left:6px}.menu-header p{margin:0 0 12px;color:var(--text-dim);font-size:12px}.menu-card h3{margin:14px 0 8px;font-size:12px;color:var(--text);border-bottom:1px dashed var(--panel-border);padding-bottom:5px}.map-list{display:grid;grid-template-columns:1fr 1fr;gap:8px}.map-card{display:flex;gap:9px;padding:8px;text-align:left;align-items:flex-start}.map-thumb{width:52px;height:52px;flex:0 0 auto;display:flex;align-items:center;justify-content:center;font-size:24px;border:1px solid rgba(0,0,0,.5)}.map-body{display:flex;flex-direction:column;gap:3px;min-width:0}.map-title{display:flex;align-items:center;gap:6px;flex-wrap:wrap}.map-title b{font-size:13px}.map-title .diff{font-size:10px;font-style:normal;padding:0 4px;border:1px solid var(--panel-border);color:var(--text-dim)}.map-title .diff-入门{color:var(--accent);border-color:var(--accent)}.map-title .diff-进阶{color:var(--accent-2);border-color:var(--accent-2)}.map-title .diff-挑战{color:var(--danger);border-color:var(--danger)}.map-title .size{font-size:10px;font-style:normal;color:var(--text-dim)}.map-desc{font-size:11px;color:var(--text-dim);line-height:1.5;white-space:normal}.map-tags{display:flex;flex-wrap:wrap;gap:3px}.map-tags i{font-style:normal;font-size:10px;color:var(--accent);border:1px solid rgba(127,208,106,.4);padding:0 3px}.map-tip{font-size:10px;color:#8fa3b0;white-space:normal;line-height:1.45}.size-list{display:grid;grid-template-columns:repeat(3,1fr);gap:8px}.size-card{display:flex;flex-direction:column;gap:3px;padding:8px;text-align:left}.size-card small{color:var(--text-dim);font-size:10px;white-space:normal;line-height:1.45}.size-card small.dim{color:#7c8a96}.menu-hint{margin:12px 0 0;padding:7px 9px;background:#0a0d10cc;border-left:3px solid var(--accent-2);color:var(--text-dim);font-size:11px;line-height:1.6}.menu-footer{display:flex;flex-wrap:wrap;gap:8px;margin-top:14px}.menu-footer button{padding:8px 14px}.menu-footer button.primary{background:var(--accent);border-color:var(--accent);color:#0b0e11;font-weight:700}.fatal{position:fixed;inset:0;z-index:99;padding:24px;overflow:auto;background:#1a0f12;border:4px solid #c0553f;color:#ffd9d0}.fatal h1{margin:0 0 12px;font-size:18px;color:#ff8f78}.fatal pre{white-space:pre-wrap;word-break:break-all;background:#0b0e11;border:1px solid #3a2228;padding:10px;font-size:12px}@media(max-width:900px){#right-stack{width:46vw;max-width:300px}.map-list,.size-list{grid-template-columns:1fr}}@media(max-width:700px){#topbar{gap:4px;padding:5px 6px}#topbar .brand .name{display:none}#topbar .group button{padding:4px 6px;font-size:11px}#brush-panel{width:47vw;max-width:200px;top:78px;max-height:calc(100vh - 170px);font-size:11px}#right-stack{width:47vw;max-width:210px;top:78px;max-height:calc(100vh - 170px);font-size:11px}.material-grid,.button-grid.cols-2{grid-template-columns:1fr}.item-grid{grid-template-columns:1fr;max-height:32vh}.button-grid.cols-4{grid-template-columns:1fr 1fr}#brush-status{bottom:28px;font-size:11px;gap:3px 9px}#brush-status .hint{display:none}#statusbar{font-size:11px;gap:3px 9px}.menu-card{padding:12px}}.candidate-list{display:flex;flex-direction:column;gap:3px;margin-top:6px;max-height:30vh;overflow-y:auto}.candidate{display:flex;align-items:center;gap:6px;padding:4px 6px;text-align:left;font-size:11px}.candidate .score{flex:0 0 auto;min-width:26px;text-align:right;color:var(--accent-2);font-weight:700}.candidate .label{flex:1;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.candidate .flag{flex:0 0 auto;font-size:10px;color:var(--accent)}.candidate.invalid .flag{color:var(--danger)}.candidate.invalid{opacity:.65}#stack-stability.ok{color:var(--accent)}#stack-stability.warn{color:var(--accent-2)}#stack-stability.bad{color:var(--danger)}.chip-list{display:flex;flex-wrap:wrap;gap:4px;margin:6px 0}.chip{display:inline-flex;align-items:center;gap:5px;padding:3px 5px;font-size:11px;background:#181e24e6;border:1px solid var(--panel-border);cursor:pointer}.chip small{color:var(--text-dim);font-size:10px}.chip button{padding:0 3px;min-width:16px;font-size:10px;line-height:14px}.chip.active{border-color:var(--accent);color:var(--accent)}.prefab-list{display:grid;grid-template-columns:1fr 1fr;gap:5px;margin:6px 0;max-height:26vh;overflow-y:auto}.prefab-card{display:flex;align-items:center;gap:5px;padding:4px;text-align:left;font-size:11px;overflow:hidden}.prefab-card img{width:38px;height:38px;flex:0 0 auto;image-rendering:pixelated;border:1px solid var(--panel-border);background:#141a21}.prefab-card .meta{display:flex;flex-direction:column;overflow:hidden;min-width:0}.prefab-card .meta b{font-size:11px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.prefab-card .meta small{color:var(--text-dim);font-size:10px}.prefab-card.active{border-color:var(--accent)}.prefab-card button{padding:0 3px;min-width:16px;font-size:10px}.chip-list .empty,.prefab-list .empty{grid-column:1 / -1;color:var(--text-dim);font-size:10px;margin:4px 0;line-height:1.5}.history-list{display:flex;flex-direction:column;gap:2px;margin-top:6px;max-height:34vh;overflow-y:auto}.history-item{display:grid;grid-template-columns:22px 1fr auto;gap:4px 6px;padding:3px 5px;font-size:11px;cursor:pointer;border-left:2px solid transparent}.history-item:hover{background:#7fd06a14}.history-item .index{color:var(--text-dim);text-align:right}.history-item .label{overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.history-item .time{color:var(--text-dim);font-size:10px}.history-item .detail{grid-column:2 / -1;color:var(--text-dim);font-size:10px}.history-item.current{border-left-color:var(--accent);background:#7fd06a1f}.history-item.future{opacity:.5}.history-list .empty{color:var(--text-dim);font-size:11px;margin:6px 0}#shortcut-help{position:absolute;inset:0;z-index:55;display:none;align-items:flex-start;justify-content:center;padding:3vh 12px;overflow-y:auto;background:#06090cd1;backdrop-filter:blur(3px)}#shortcut-help.visible{display:flex}.shortcut-card{width:min(760px,100%);max-height:94vh;overflow-y:auto}.shortcut-group{margin-bottom:8px;border-bottom:1px dashed var(--panel-border);padding-bottom:6px}.shortcut-group>summary{cursor:pointer;color:var(--accent);font-weight:700;font-size:12px;padding-bottom:4px}.shortcut-rows{display:grid;grid-template-columns:1fr 1fr;gap:3px 14px}.shortcut-row{display:flex;align-items:baseline;gap:8px;font-size:11px}.shortcut-row kbd{flex:0 0 auto;min-width:92px;text-align:right;font-family:var(--mono);font-size:10px;color:var(--accent-2)}.shortcut-row span{color:var(--text-dim)}#select-status{position:absolute;left:0;right:0;bottom:52px;display:flex;flex-wrap:wrap;gap:4px 12px;padding:5px 10px;color:var(--text-dim);font-size:12px;pointer-events:none;background:linear-gradient(180deg,#0b0e1100,#0b0e118c)}#select-status b{color:var(--accent);font-weight:700}#select-status .hint{color:#6f7d8a;font-size:11px}#select-rect{pointer-events:none}@media(max-width:900px){.shortcut-rows,.prefab-list{grid-template-columns:1fr}}@media(max-width:700px){#select-status{bottom:50px;font-size:10px;gap:3px 8px}#select-status .hint{display:none}.history-list{max-height:26vh}}.slot-list{list-style:none;margin:6px 0 0;padding:0;max-height:22vh;overflow-y:auto;display:flex;flex-direction:column;gap:3px}.slot-list li{display:grid;grid-template-columns:auto 1fr;gap:2px 8px;padding:3px 5px;font-size:11px;background:#181e24b3;border-left:2px solid var(--accent-2)}.slot-list li b{color:var(--accent-2)}.slot-list li span{text-align:right;color:var(--text)}.slot-list li small{grid-column:1 / -1;color:var(--text-dim);font-size:10px}.slot-list li.empty{border-left-color:var(--panel-border);color:var(--text-dim);grid-template-columns:1fr}#stk-stability.ok,#sd-stability.ok{color:var(--accent)}#stk-stability.warn,#sd-stability.warn{color:var(--accent-2)}#stk-stability.bad,#sd-stability.bad{color:var(--danger)}.inline-label.warn{color:var(--accent-2);min-height:1em}#stacking-panel input[type=range]{width:100%;accent-color:var(--accent);height:18px;background:transparent}button.wide{width:100%;margin-top:6px}.legend.rows{flex-direction:column;align-items:stretch;gap:3px}.legend-row{display:flex;flex-direction:column;gap:1px;font-size:10px;line-height:1.5;padding:3px 5px;border:1px solid var(--panel-border);background:#ffffff05}.legend-row b{color:var(--text);font-weight:600}.legend-row span{color:var(--text-dim)}.legend-row span.warn{color:var(--accent-2)}#rm-gc-note{min-height:1em;line-height:1.5}.bar{height:6px;border-radius:999px;background:#ffffff1a;overflow:hidden;margin:6px 0}.bar-fill{width:0%;height:100%;border-radius:999px;background:linear-gradient(90deg,var(--accent),var(--accent-2));transition:width .18s ease}#combo-panel .group,#tutorial-panel .group{display:flex;gap:6px;align-items:center}#combo-search{flex:1;min-height:32px;padding:0 8px;border-radius:8px;border:1px solid var(--panel-border);background:#ffffff0a;color:var(--text);font-size:12px}#combo-close{min-width:32px;min-height:32px}#combo-panel .map-list{max-height:320px;overflow-y:auto}#combo-panel .map-card{cursor:pointer}#combo-panel .map-card>button{margin-top:6px}#tutorial-panel .legend-row.done b{color:var(--text-dim)}#tutorial-panel .legend-row.done span{text-decoration:line-through;opacity:.7}#tutorial-panel .legend-row.active{border-color:var(--accent);background:#4ade8014}button.primary,.button-grid button.primary{background:var(--accent);border-color:var(--accent);color:#06120a;font-weight:600}#sandbox-panel #sandbox-options input:disabled+span{opacity:.5}#physics-debug-panel .legend-row b{min-width:96px}body.touch-device .panel{max-width:46vw}body.mobile-narrow .panel>details:not([open]){max-height:32px}body.mobile-narrow #debug-panel,body.mobile-narrow #physics-debug-panel,body.mobile-narrow #sandbox-panel,body.mobile-narrow #combo-panel,body.mobile-narrow #tutorial-panel{display:none}body.touch-device button,body.touch-device .chip,body.touch-device input[type=checkbox]{min-height:44px}body.touch-device input[type=checkbox]{min-width:44px}body.touch-device #topbar{flex-wrap:wrap;row-gap:4px}body.touch-device #statusbar{font-size:10px}body.mobile-portrait #statusbar{padding-bottom:calc(env(safe-area-inset-bottom,0px) + 2px)}body.mobile-portrait #topbar{padding-top:env(safe-area-inset-top,0px)}#tp-step-ms.warn{color:var(--danger)}#time-panel.rewinding{border-color:var(--accent-2)}#time-panel.rewinding summary{color:var(--accent-2)}#physics-panel.over-limit{border-color:var(--danger)}#stress-panel.stress-off #sp-legend{opacity:.6}#physics-tutorial-panel .legend-row.done b{color:var(--text-dim)}#physics-tutorial-panel .legend-row.done span{text-decoration:line-through;opacity:.7}#physics-tutorial-panel .legend-row.active{border-color:var(--accent);background:#4ade8014}#ptut-level-dots i{width:10px;height:10px;border-radius:999px;display:inline-block;border:1px solid var(--panel-border)}#ptut-level-dots i.done{background:var(--accent)}#ptut-level-dots i.active{background:var(--accent-2)}body.mobile-narrow #time-controls [data-scale="0.25"],body.mobile-narrow #time-controls [data-scale="0.5"]{display:none}