:root{color-scheme:dark;--ink:#fff8f3;--muted:#bcb2c9;--faint:#fff8f37a;--accent:#db7d74;--gold:#e8c88b;--panel:#160e27c2;--panel-strong:#0e091deb;--line:#ffffff21;--soft-line:#ffffff12;--board:#100b20;--body-bg:#090615;--shadow:#02010a7a}:root[data-theme=light]{color-scheme:light;--ink:#34213c;--muted:#736376;--faint:#34213c7a;--panel:#fffaf6c7;--panel-strong:#fffcf9f2;--line:#52375b29;--soft-line:#52375b14;--board:#f8edec;--body-bg:#f4e6e4;--shadow:#5b36572b}*{box-sizing:border-box}html{background:var(--body-bg);min-width:320px}body{min-height:100vh;color:var(--ink);background:var(--body-bg);margin:0;font-family:LXGW WenKai Mono Lite,PingFang SC,system-ui,sans-serif;overflow-x:hidden}body:before{z-index:-2;content:"";filter:saturate(.6);background:linear-gradient(105deg,#080512f2,#1e102ec2),url(/assets/optimized/game-bg.webp) 50% 34%/cover;position:fixed;inset:0}:root[data-theme=light] body:before{filter:saturate(.42)brightness(1.3);background:linear-gradient(105deg,#fdf3f0f0,#f2dce5d1),url(/assets/optimized/game-bg.webp) 50% 34%/cover}body:after{z-index:-1;content:"";pointer-events:none;background:radial-gradient(circle at 15% 28%,#a274e333,#0000 26%),radial-gradient(circle at 84% 68%,#db7d742e,#0000 24%),radial-gradient(circle,#fff3e199 0 1px,#0000 1.4px) 17px 31px/150px 150px;position:fixed;inset:0}button{color:inherit;font:inherit}button:focus-visible,.assembly-piece:focus-visible{outline:2px solid var(--accent);outline-offset:3px}.page{width:min(1440px,100% - 48px);margin:auto;padding:38px 0 54px}.game-header{justify-content:space-between;align-items:end;gap:32px;width:min(1120px,100%);margin:0 auto 24px;padding-inline:72px;display:flex}.kicker{color:var(--gold);letter-spacing:.24em;margin:0 0 8px;font-size:10px;font-weight:800}h1{letter-spacing:-.07em;text-shadow:0 0 34px #b885f13d;margin:0;font:500 clamp(42px,6vw,72px)/.98 LXGW WenKai Mono Lite,STKaiti,serif}.intro{max-width:610px;color:var(--muted);margin:11px 0 0;font-size:13px;line-height:1.75}.theme-toggle{border:1px solid var(--line);background:var(--panel);min-height:40px;box-shadow:0 12px 30px var(--shadow);cursor:pointer;backdrop-filter:blur(16px);border-radius:999px;flex:none;align-items:center;gap:8px;padding:0 14px;display:inline-flex}.theme-toggle span{color:var(--gold);font-size:17px}.theme-toggle b{font-size:11px;font-weight:500}.game-layout{grid-template-columns:210px minmax(420px,720px) 260px;justify-content:center;align-items:start;gap:18px;display:grid}.panel,.assembly-card{border:1px solid var(--line);background:var(--panel);box-shadow:0 26px 72px var(--shadow), inset 0 1px #ffffff0f;backdrop-filter:blur(22px)}.panel{border-radius:24px;padding:18px}.panel-heading{border-bottom:1px solid var(--soft-line);align-items:center;gap:11px;padding-bottom:14px;display:flex}.panel-heading>span{width:30px;height:30px;color:var(--accent);border:1px solid #db7d746b;border-radius:50%;place-items:center;font:11px/1 Georgia,serif;display:grid}.panel-heading small{color:var(--faint);letter-spacing:.2em;margin-bottom:2px;font-size:8px;font-weight:700;display:block}.panel-heading h2{margin:0;font-size:16px;font-weight:600}.filter-group{margin-top:17px}.filter-group>strong{color:var(--faint);letter-spacing:.14em;margin-bottom:8px;font-size:9px;font-weight:600;display:block}.filter-options{grid-template-columns:repeat(2,minmax(0,1fr));gap:7px;display:grid}.filter-button{border:1px solid var(--soft-line);cursor:pointer;background:#ffffff09;border-radius:10px;min-width:0;min-height:32px;padding:0 8px;font-size:10px;transition:all .16s}.filter-button:hover{border-color:#db7d7473;transform:translateY(-1px)}.filter-button[aria-pressed=true]{background:#db7d7426;border-color:#db7d74c7;box-shadow:inset 0 0 0 1px #db7d741f}.play-notes{border-top:1px solid var(--soft-line);gap:10px;margin-top:17px;padding-top:16px;display:grid}.play-notes p{color:var(--muted);grid-template-columns:22px 1fr;align-items:start;gap:8px;margin:0;font-size:10px;line-height:1.5;display:grid}.play-notes b{width:20px;height:20px;color:var(--accent);background:#db7d741f;border-radius:50%;place-items:center;font:10px/1 Georgia,serif;display:grid}.assembly-card{background:var(--panel-strong);border-radius:27px;padding:11px}.assembly-topbar,.assembly-controls{justify-content:space-between;align-items:center;gap:12px;min-height:44px;padding-inline:8px;display:flex}.assembly-topbar{color:var(--faint);letter-spacing:.09em;font-size:9px}.assembly-topbar>div{align-items:center;gap:8px;display:flex}.assembly-topbar b{color:var(--muted);font-size:10px}.status-dot{background:#a88be7;border-radius:50%;width:7px;height:7px;box-shadow:0 0 9px #a88be7}.board-shell{width:min(100%,680px);margin:auto;position:relative}.assembly-board{isolation:isolate;aspect-ratio:1;background:radial-gradient(circle at 50% 46%, #9f72da29, transparent 40%), linear-gradient(#0d091c1f, #080613ad), var(--board);user-select:none;border:1px solid #db7d7459;border-radius:18px;width:100%;position:relative;overflow:hidden;box-shadow:inset 0 0 46px #02010942}:root[data-theme=light] .assembly-board{background:radial-gradient(circle at 50% 46%, #b584cb2b, transparent 40%), linear-gradient(#ffffff4d, #e0c1cc26), var(--board);box-shadow:inset 0 0 40px #5b36571a}.assembly-board:before{z-index:20;content:"";pointer-events:none;border:1px dashed #db7d7447;border-radius:12px;position:absolute;inset:11px}.assembly-board:after{z-index:22;background:linear-gradient(90deg, transparent, var(--accent), transparent);content:"";opacity:.52;height:3px;position:absolute;bottom:0;left:0;right:0}.board-grid{z-index:0;background:linear-gradient(#ffffff09 1px,#0000 1px) 0 0/10% 10%,linear-gradient(90deg,#ffffff09 1px,#0000 1px) 0 0/10% 10%;position:absolute;inset:0;mask-image:radial-gradient(circle,#000,#0000 78%)}.piece-stage{position:absolute;inset:0}.assembly-piece{object-fit:fill;cursor:grab;touch-action:none;transform-origin:50%;-webkit-user-drag:none;display:block;position:absolute}.mesh-editor{z-index:260;pointer-events:none;position:absolute;inset:0}.assembly-board.is-drop-target{border-color:#e8c88be6;box-shadow:inset 0 0 58px #db7d7433,0 0 0 3px #e8c88b2e}.mesh-editor[hidden]{display:none}.mesh-editor svg,.mesh-handles{width:100%;height:100%;position:absolute;inset:0}.mesh-editor path{fill:none;stroke:#fff8e1db;stroke-width:2px;stroke-dasharray:7 5;vector-effect:non-scaling-stroke;filter:drop-shadow(0 0 3px #db7d74e6)}.mesh-handle{background:var(--accent);cursor:move;pointer-events:auto;touch-action:none;border:2px solid #fff8e8;border-radius:50%;width:18px;height:18px;padding:0;position:absolute;transform:translate(-50%,-50%);box-shadow:0 0 0 3px #10091fb8,0 0 12px #db7d74e6}.mesh-handle:nth-child(5){background:var(--gold);width:22px;height:22px}.assembly-piece.is-selected{filter:drop-shadow(0 0 8px #fff6ded1) drop-shadow(0 0 13px var(--accent)) drop-shadow(0 10px 15px #0000005c)}.assembly-piece.is-dragging{cursor:grabbing;filter:drop-shadow(0 0 14px #db7d74eb)drop-shadow(0 12px 18px #0000006b)}.board-empty{z-index:18;width:max-content;max-width:80%;color:var(--muted);text-align:center;pointer-events:none;place-items:center;display:grid;position:absolute;top:50%;left:50%;transform:translate(-50%,-50%)}.board-empty[hidden]{display:none}.board-empty span{color:var(--accent);text-shadow:0 0 17px var(--accent);margin-bottom:8px;font-size:27px}.board-empty b{font-size:12px;font-weight:600}.board-empty small{color:var(--faint);margin-top:6px;font-size:9px}.boundary-label{z-index:30;color:#fff5eca8;letter-spacing:.13em;pointer-events:none;background:#0c0718a3;border:1px solid #db7d744d;border-radius:999px;padding:5px 8px;font-size:7px;font-weight:700;position:absolute;bottom:10px;right:15px}.assembly-controls{justify-content:stretch;align-items:stretch;gap:7px;min-height:92px;padding:9px 8px 6px;display:grid}.assembly-controls p{min-width:0;color:var(--muted);margin:0;font-size:10px;line-height:1.5}.assembly-controls>.layer-controls{flex-wrap:wrap;align-items:center;gap:7px 8px;width:100%;display:flex}.control-group{border:1px solid var(--soft-line);background:#ffffff06;border-radius:12px;flex:none;gap:4px;padding:4px;display:flex}.assembly-controls button{border:1px solid var(--line);white-space:nowrap;cursor:pointer;background:#ffffff0d;border-radius:9px;min-height:32px;padding:0 9px;font-size:9px}#clear-button{background:#db7d741f;border-color:#db7d7457}#export-button{color:var(--gold);background:#e8c88b1a;border-color:#e8c88b6b}.assembly-controls button:disabled{opacity:.38;cursor:default}.assembly-controls button[aria-pressed=true]{background:#db7d742e;border-color:#db7d74c7;box-shadow:inset 0 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img{object-fit:contain;filter:drop-shadow(0 3px 5px #0201085c);max-width:92%;max-height:58px}.part-option b{text-overflow:ellipsis;white-space:nowrap;font-size:9px;font-weight:500;overflow:hidden}.part-option small{color:var(--faint);text-overflow:ellipsis;white-space:nowrap;font-size:8px;overflow:hidden}.part-option i{color:#fff;background:var(--accent);border-radius:50%;place-items:center;width:18px;height:18px;font-size:10px;font-style:normal;display:grid;position:absolute;top:6px;right:6px;box-shadow:0 0 10px #db7d7475}.part-option:hover{background:#db7d741c;border-color:#db7d74ad;transform:translateY(-1px)}.part-option.is-library-dragging{border-color:var(--gold);cursor:grabbing;opacity:.55;transform:scale(.97)}.part-drag-handle{cursor:grab;touch-action:none}.part-drag-preview{z-index:1500;color:#fff8ed;pointer-events:none;background:#190f2be6;border:1px solid #db7d74b8;border-radius:16px;place-items:center;width:112px;height:132px;padding:8px;transition:border-color .12s,box-shadow .12s,transform .12s;display:grid;position:fixed;transform:translate(-50%,-50%)scale(.92);box-shadow:0 16px 42px #04020e7a}.part-drag-preview img{object-fit:contain;filter:drop-shadow(0 4px 8px #0000006b);max-width:88px;max-height:92px}.part-drag-preview span{text-overflow:ellipsis;white-space:nowrap;max-width:100%;font-size:9px;overflow:hidden}.part-drag-preview.is-over-board{border-color:var(--gold);transform:translate(-50%,-50%)scale(1);box-shadow:0 0 0 4px #e8c88b29,0 18px 48px #04020e85}.game-toast{top:max(14px, calc(env(safe-area-inset-top) + 10px));right:max(14px, calc(env(safe-area-inset-right) + 10px));z-index:1200;color:#fff8ed;opacity:0;pointer-events:none;background:#231639f2;border:1px solid #db7d74b3;border-radius:999px;align-items:center;gap:10px;max-width:min(100vw - 28px,340px);padding:9px 17px 9px 10px;transition:opacity .18s,transform .22s;display:flex;position:fixed;transform:translate(18px)scale(.96);box-shadow:0 14px 42px #0904166b,0 0 22px 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env(safe-area-inset-bottom))}.game-header{align-items:start;gap:12px;padding-inline:4px}h1{font-size:clamp(38px,12vw,56px)}.kicker{letter-spacing:.17em;font-size:8px}.intro{font-size:11px}.theme-toggle{justify-content:center;width:40px;height:40px;padding:0}.theme-toggle b{clip:rect(0 0 0 0);clip-path:inset(50%);width:1px;height:1px;position:absolute;overflow:hidden}.game-layout{flex-direction:column;gap:12px;display:flex}.panel,.assembly-card{width:100%}.filter-panel{order:1}.assembly-card{order:2}.parts-panel{order:3}.filter-panel{grid-template-columns:1fr 1fr;gap:0 14px;display:grid}.filter-panel .panel-heading,.filter-panel .play-notes{grid-column:1/-1}.filter-group{min-width:0}.play-notes{display:none}.assembly-card{border-radius:20px;padding:8px}.assembly-board{border-radius:14px}.assembly-controls{min-height:0;padding:10px 3px 4px}.assembly-controls p{font-size:9px}.control-group{flex:1 1 max-content;justify-content:center}.assembly-controls button{flex:auto;padding-inline:7px}.parts-list{grid-template-columns:repeat(4,minmax(0,1fr))}.part-option{grid-template-rows:58px auto auto}.part-option>span{height:58px}.part-option img{max-height:52px}}@media (width<=420px){.parts-list{grid-template-columns:repeat(3,minmax(0,1fr))}.assembly-controls p{padding-top:0}.control-group{width:100%}.filter-panel{display:block}.filter-options{grid-template-columns:repeat(4,minmax(0,1fr))}}@media (prefers-reduced-motion:reduce){*,:before,:after{scroll-behavior:auto!important;transition-duration:1ms!important;animation-duration:1ms!important;animation-iteration-count:1!important}}