:root{--sidebar-w: 360px;--blue: #2d70b3;--green: #388c46;--ink: #2b2f36;--muted: #7a828f;--line: #e6e8ec;--bg: #ffffff;--panel: #fbfcfd;font-family:Inter,ui-sans-serif,system-ui,-apple-system,Segoe UI,Roboto,sans-serif;-webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility}*{box-sizing:border-box}html,body,#root{margin:0;height:100%}.mode-pane{height:100%}.app{display:flex;height:100vh;width:100vw;color:var(--ink);background:var(--bg)}.sidebar{width:var(--sidebar-w);flex:0 0 var(--sidebar-w);border-right:1px solid var(--line);display:flex;flex-direction:column;overflow-y:auto}.brand{display:flex;align-items:center;gap:9px;padding:14px 16px;border-bottom:1px solid var(--line);position:sticky;top:0;background:var(--bg);z-index:5}.brand-mark{color:var(--blue);font-size:20px;line-height:1}.brand h1{font-size:20px;font-weight:700;letter-spacing:-.01em;margin:0}.mode-toggle{display:flex;gap:2px;background:#eef0f3;border-radius:8px;padding:2px;margin-right:auto}.mode-toggle button{font:inherit;font-size:12px;font-weight:600;padding:3px 10px;border:none;border-radius:6px;background:transparent;color:var(--muted);cursor:pointer}.mode-toggle button.on{background:#fff;color:var(--ink);box-shadow:0 1px 2px #0000001a}.gear-wrap{position:relative}.gear{font:inherit;width:30px;height:30px;border:1px solid var(--line);border-radius:8px;background:#fff;color:var(--ink);font-size:18px;line-height:1;cursor:pointer;display:flex;align-items:center;justify-content:center;transition:background .12s,border-color .12s}.gear:hover{background:#f1f5fa;border-color:var(--blue)}.gear-sm{width:24px;height:24px;font-size:13px}.gear:disabled{opacity:.35;cursor:default}.gear:disabled:hover{background:#fff;border-color:var(--line)}.palette{position:absolute;right:0;top:calc(100% + 6px);background:#fff;border:1px solid var(--line);border-radius:10px;box-shadow:0 8px 24px #0000001f;padding:6px;z-index:20;min-width:160px}.palette-item{display:block;width:100%;text-align:left;font:inherit;font-size:14px;padding:8px 10px;border:none;border-radius:7px;background:transparent;color:var(--ink);cursor:pointer}.palette-item:hover{background:#f1f5fa}.rows{flex:1}.empty-hint{color:var(--muted);font-size:14px;padding:18px 16px}.row{display:flex;border-bottom:1px solid var(--line)}.row-index{flex:0 0 28px;text-align:center;padding-top:12px;font-size:12px;color:var(--muted);background:var(--panel);border-right:1px solid var(--line)}.row-body{flex:1;min-width:0;padding:10px 12px}.row-top{display:flex;align-items:center;gap:8px}.dot{flex:0 0 auto;width:11px;height:11px;border-radius:50%}.dot-empty{border:1px solid var(--line);background:transparent}.toggle-dot{flex:0 0 auto;width:17px;height:17px;padding:0;border-radius:50%;border:2px solid currentColor;background:transparent;color:var(--muted);cursor:pointer;transition:background .12s,opacity .12s}.toggle-dot:hover{opacity:.75}.toggle-dot.on{background:currentColor}.toggle-dot.matrix{border-color:#9bb4c9}.toggle-dot.matrix.on{border-color:transparent;background:linear-gradient(135deg,var(--blue) 0 50%,var(--green) 50% 100%)}.toggle-dot.eigen{border-color:#d3b49a}.toggle-dot.eigen.on{border-color:transparent;background:linear-gradient(135deg,#e0792b 0,#e0792b 50%,#6042a6 50%,#6042a6)}.row-main{display:flex;align-items:center;gap:6px;flex:1;min-width:0}.expr-main{min-width:0}.name-input{width:30px;font:inherit;font-style:italic;font-size:16px;text-align:center;border:1px solid transparent;border-radius:6px;background:transparent;color:var(--ink);outline:none}.name-input:hover,.name-input:focus{border-color:var(--line)}.eq{font-size:16px;color:var(--muted)}.expr-input{flex:1;width:100%;min-width:0;font:inherit;font-size:16px;padding:8px 10px;border:1px solid var(--line);border-radius:8px;background:#fff;outline:none;transition:border-color .12s,box-shadow .12s}.expr-input:focus{border-color:var(--blue);box-shadow:0 0 0 3px #2d70b326}.row-actions{flex:0 0 auto;display:flex;align-items:center;gap:4px}.del{font:inherit;width:24px;height:24px;border:none;border-radius:6px;background:transparent;color:var(--muted);font-size:18px;line-height:1;cursor:pointer}.del:hover{background:#fbecec;color:var(--red, #c74440)}.matrix-bracket{position:relative;padding:4px 11px}.matrix-bracket:before,.matrix-bracket:after{content:"";position:absolute;top:0;bottom:0;width:7px;border:2px solid var(--ink)}.matrix-bracket:before{left:0;border-right:none;border-radius:4px 0 0 4px}.matrix-bracket:after{right:0;border-left:none;border-radius:0 4px 4px 0}.matrix-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:6px}.matrix-grid.dim3{grid-template-columns:repeat(3,1fr)}.matrix-grid.dim3 .matrix-cell{width:40px;height:34px;font-size:14px}.vector-grid{display:grid;grid-template-columns:1fr;gap:6px}.matrix-cell{width:46px;height:38px;text-align:center;font-size:16px;font-variant-numeric:tabular-nums;color:var(--ink);border:1px solid var(--line);border-radius:7px;background:#fff;outline:none;transition:border-color .12s,box-shadow .12s}.matrix-cell:hover{border-color:#cfd4db}.matrix-cell:focus{border-color:var(--blue);box-shadow:0 0 0 3px #2d70b326}.anim{display:flex;align-items:center;gap:10px;margin-top:10px;padding-left:19px}.play{flex:0 0 auto;width:28px;height:28px;display:flex;align-items:center;justify-content:center;font-size:11px;color:#fff;background:var(--blue);border:none;border-radius:50%;cursor:pointer;transition:background .12s,transform .08s}.play:hover{background:#275f97}.play:active{transform:scale(.92)}.anim-slider{flex:1 1 auto;min-width:0;accent-color:var(--blue);cursor:pointer}.stage-label{flex:0 0 auto;font-size:12px;color:var(--muted);font-variant-numeric:tabular-nums;white-space:nowrap}.slider-row{display:flex;align-items:center;gap:8px;margin-top:8px;padding-left:19px}.slider-bound{flex:0 0 auto;width:46px;height:26px;text-align:center;font:inherit;font-size:12.5px;font-variant-numeric:tabular-nums;color:var(--muted);border:1px solid var(--line);border-radius:6px;background:#fff;outline:none;transition:border-color .12s,box-shadow .12s}.slider-bound:hover{border-color:#cfd4db}.slider-bound:focus{border-color:var(--blue);color:var(--ink);box-shadow:0 0 0 3px #2d70b326}.result-line{display:flex;align-items:baseline;gap:8px;margin-top:8px;padding-left:19px}.result-eq{color:var(--muted);font-size:15px}.result-value{font-size:16px;font-weight:600;font-variant-numeric:tabular-nums}.result-error{margin-top:6px;padding-left:19px;font-size:12.5px;color:#c74440}.hint{padding:12px 16px;font-size:12px;color:var(--muted);text-align:center;border-top:1px solid var(--line)}.stage{flex:1 1 auto;position:relative;min-width:0}.warp-canvas{display:block;width:100%;height:100%;touch-action:none}.warp-canvas3d{width:100%;height:100%;overflow:hidden;background:#fff}.warp-canvas3d canvas{display:block;touch-action:none}