.doodle-board{--db-face: #c0c0c0;--db-hilight: #ffffff;--db-shadow: #808080;--db-dkshadow: #000000;--db-workspace: #808080;--db-text: #000000;display:flex;flex-direction:column;flex:1;width:100%;height:100%;min-height:0;overflow:hidden;background:var(--db-face);font-family:Segoe UI,Tahoma,Arial,sans-serif;font-size:12px;color:var(--db-text);user-select:none;-webkit-user-select:none}.doodle-topbar{display:flex;flex-direction:column;flex-shrink:0;gap:0;border-bottom:1px solid var(--db-shadow);background:var(--db-face);box-shadow:inset 0 -1px var(--db-hilight);position:relative;z-index:20}.doodle-topbar-row{display:flex;align-items:center;gap:6px;padding:2px 6px}.doodle-topbar-row--menu{flex-shrink:0;overflow:visible;padding-top:3px;padding-bottom:1px;border-bottom:1px solid var(--db-hilight)}.doodle-topbar-row--tools{flex-shrink:0;min-height:62px;overflow:hidden}.doodle-brand{display:flex;flex-shrink:0;align-items:center;text-decoration:none}.doodle-brand:hover{opacity:.85}.doodle-logo{display:block;height:1.5rem;width:auto}.doodle-menus{display:flex;flex-shrink:0;flex-wrap:nowrap;gap:0}.doodle-menu{position:relative;z-index:30}.doodle-menu-trigger{margin:0;padding:2px 6px;border:1px solid transparent;background:transparent;font:inherit;cursor:default;white-space:nowrap}.doodle-menu-trigger:hover,.doodle-menu.is-open .doodle-menu-trigger{border-color:var(--db-shadow) var(--db-hilight) var(--db-hilight) var(--db-shadow);background:var(--db-face)}.doodle-menu-panel{position:absolute;top:100%;left:0;z-index:1000;min-width:160px;margin-top:1px;padding:2px;border:1px solid var(--db-dkshadow);background:var(--db-face);box-shadow:2px 2px #00000040,inset -1px -1px var(--db-hilight),inset 1px 1px var(--db-shadow),inset -2px -2px var(--db-face),inset 2px 2px var(--db-dkshadow)}.doodle-menu-panel:not([hidden]){display:block}.doodle-menu-panel[hidden]{display:none}.doodle-menu-item{display:block;width:100%;padding:3px 20px;border:none;background:transparent;font:inherit;text-align:left;text-decoration:none;color:inherit;cursor:default;white-space:nowrap}.doodle-menu-item:hover,.doodle-menu-item:focus{background:navy;color:#fff;outline:none}.doodle-topbar-sep{flex-shrink:0;align-self:stretch;width:2px;margin:2px 0;background:var(--db-shadow);box-shadow:1px 0 var(--db-hilight)}.doodle-toolbar{display:flex;flex:1;flex-direction:column;gap:1px;min-width:0;overflow-x:auto;overflow-y:hidden;scrollbar-width:none;border:1px solid var(--db-shadow);border-top-color:var(--db-dkshadow);border-left-color:var(--db-dkshadow);background:var(--db-face);box-shadow:inset 1px 1px var(--db-hilight),inset -1px -1px var(--db-shadow)}.doodle-toolbar::-webkit-scrollbar{display:none}.doodle-toolbar-row{display:flex;flex-shrink:0;align-items:center}.doodle-tool{position:relative;flex-shrink:0;box-sizing:border-box;width:28px;height:28px;margin:0;padding:0;border:0;border-right:1px solid var(--db-dkshadow);background:transparent;cursor:default;outline:0}.doodle-tool:last-child{border-right:0}.doodle-tool:before{content:"";position:absolute;z-index:1;inset:0;border-top:1px solid var(--db-hilight);border-left:1px solid var(--db-hilight);border-right:1px solid var(--db-shadow);border-bottom:1px solid var(--db-shadow);pointer-events:none}.doodle-tool:hover:active,.doodle-tool.is-active{padding:1px 1px 1px 2px;border-top:1px solid var(--db-dkshadow);border-left:1px solid var(--db-dkshadow);border-right:1px solid var(--db-hilight);background:transparent}.doodle-tool:hover:active:before,.doodle-tool.is-active:before{inset:0;border-top:1px solid var(--db-shadow);border-left:1px solid var(--db-shadow);border-right:1px solid var(--db-face);border-bottom:1px solid var(--db-face)}.doodle-tool.is-active{background:repeating-conic-gradient(gray 0% 25%,silver 0% 50%) 50% / 8px 8px}.doodle-tool-icon{position:absolute;left:6px;top:6px;z-index:2;display:flex;width:16px;height:16px;pointer-events:none}.doodle-tool-icon svg{display:block;width:16px;height:16px}.doodle-tool-options{display:flex;flex-shrink:0;align-items:center;gap:2px;padding:2px;border:1px solid var(--db-hilight);border-top-color:var(--db-shadow);border-left-color:var(--db-shadow);box-sizing:border-box}.doodle-opt-stroke{display:grid;grid-template-columns:repeat(2,22px);grid-template-rows:repeat(2,14px);gap:1px}.doodle-opt-shape{display:flex;flex-direction:column;gap:1px}.doodle-opt-shape[hidden]{display:none}.doodle-stroke-opt,.doodle-shape-opt{display:flex;align-items:center;justify-content:center;margin:0;padding:1px;border:1px solid transparent;background:transparent;cursor:default}.doodle-stroke-opt svg{width:20px;height:6px}.doodle-stroke-opt.is-active,.doodle-shape-opt.is-active,.doodle-stroke-opt[aria-pressed=true],.doodle-shape-opt[aria-pressed=true]{border-color:var(--db-shadow) var(--db-hilight) var(--db-hilight) var(--db-shadow);background:var(--db-face)}.doodle-shape-opt span{display:flex;width:16px;height:16px}.doodle-toolbar-colors{display:flex;flex-shrink:0;align-items:center;gap:4px}.doodle-current-colors{position:relative;flex-shrink:0;width:30px;height:31px;margin:0;padding:0;border:0;background:transparent;cursor:default}.doodle-color-swatch{position:absolute;box-sizing:border-box;width:15px;height:15px;border-top:1px solid var(--db-shadow);border-left:1px solid var(--db-shadow);border-right:1px solid var(--db-face);border-bottom:1px solid var(--db-face)}.doodle-color-swatch:after{content:"";position:absolute;inset:-1px -2px -2px -1px;border-right:1px solid var(--db-hilight);border-bottom:1px solid var(--db-hilight);pointer-events:none}.doodle-fg-swatch{left:2px;top:4px;border-top-color:var(--db-hilight);border-left-color:var(--db-hilight);border-right-color:var(--db-shadow);border-bottom-color:var(--db-shadow)}.doodle-bg-swatch{right:3px;bottom:3px}.doodle-palette{display:grid;grid-template-columns:repeat(10,15px);grid-template-rows:repeat(2,15px);gap:1px}.doodle-palette-swatch{width:15px;height:15px;margin:0;padding:0;border:0;border-top:1px solid var(--db-shadow);border-left:1px solid var(--db-shadow);border-right:1px solid var(--db-face);border-bottom:1px solid var(--db-face);cursor:default;box-sizing:border-box}.doodle-palette-swatch.is-active{outline:1px solid #000;outline-offset:-1px}.doodle-edit-colors-btn{display:flex;align-items:center;margin:0;padding:2px 6px;min-height:23px;border:none;background:var(--db-face);box-shadow:inset -1px -1px var(--db-dkshadow),inset 1px 1px var(--db-hilight),inset -2px -2px var(--db-shadow),inset 2px 2px var(--db-face);font:inherit;font-size:11px;cursor:default;white-space:nowrap}.doodle-edit-colors-btn:active{box-shadow:inset -1px -1px var(--db-hilight),inset 1px 1px var(--db-dkshadow),inset -2px -2px var(--db-face),inset 2px 2px var(--db-shadow)}.doodle-canvas-area{flex:1;min-width:0;min-height:0;overflow:hidden;background:var(--db-workspace)}.doodle-stage{position:relative;width:100%;height:100%;min-height:0;overflow:hidden;background:var(--db-workspace)}.doodle-canvas{display:block;width:100%;height:100%;touch-action:none;cursor:crosshair;background:#fff}.doodle-board.is-eraser .doodle-canvas{cursor:cell}.doodle-board.is-fill .doodle-canvas{cursor:copy}.doodle-board.is-eyedropper .doodle-canvas{cursor:crosshair}.doodle-board.is-text .doodle-canvas{cursor:text}.doodle-board.is-magnifier .doodle-canvas{cursor:zoom-in}.doodle-board.is-select .doodle-canvas{cursor:default}.doodle-selection{position:absolute;pointer-events:none;border:1px dashed #000;background:transparent;animation:doodle-march .4s steps(2) infinite}@keyframes doodle-march{to{border-color:#fff}}.doodle-text-input{position:absolute;z-index:2;min-width:4rem;padding:0;border:1px dotted #000;background:transparent;font-family:Arial,sans-serif;outline:none}.doodle-loupe{position:absolute;z-index:3;pointer-events:none;border:2px solid #000;border-radius:50%;box-shadow:2px 2px #0006}.doodle-status{display:flex;flex-shrink:0;gap:2px;padding:0 2px 2px;overflow:hidden;white-space:nowrap;cursor:default}.doodle-status-text,.doodle-status-coords{display:flex;align-items:center;min-height:21px;padding:2px 3px;box-shadow:inset -1px -1px var(--db-face),inset 1px 1px var(--db-shadow)}.doodle-status-text{flex:1 1 auto;overflow:hidden;text-overflow:ellipsis}.doodle-status-coords{flex:0 0 114px;min-width:0;padding-left:3px}@media(max-width:900px){.doodle-topbar-row--tools{flex-wrap:wrap}.doodle-toolbar{flex:1 1 100%}.doodle-toolbar-colors{flex:1 1 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4px;background:linear-gradient(90deg,navy,#1084d0);color:#fff;font-size:11px;font-weight:600}.doodle-about-close{display:flex;align-items:center;justify-content:center;width:16px;height:14px;margin:0;padding:0;border:none;background:var(--db-face);box-shadow:inset -1px -1px var(--db-dkshadow),inset 1px 1px var(--db-hilight);font-size:12px;line-height:1;cursor:default}.doodle-about-body{padding:12px 14px;font-size:12px;line-height:1.45;color:var(--db-text)}.doodle-about-body p{margin:0 0 10px}.doodle-about-body ul{margin:0 0 10px;padding-left:18px}.doodle-about-body li{margin-bottom:4px}.doodle-about-body a{color:#00f}.doodle-about-footer{margin-bottom:0!important;font-size:11px;color:#444}.doodle-about-actions{display:flex;justify-content:center;padding:0 14px 12px}.doodle-about-ok{min-width:75px;min-height:23px;padding:0 16px;border:none;background:var(--db-face);box-shadow:inset -1px -1px var(--db-dkshadow),inset 1px 1px var(--db-hilight),inset -2px -2px var(--db-shadow),inset 2px 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rgba(255,255,255,.1);pointer-events:auto}.constellation-brand{display:flex;flex-shrink:0;text-decoration:none}.constellation-logo{display:block;height:1.25rem;width:auto;filter:brightness(0) invert(1);opacity:.92}.constellation-title{margin:0;font-size:.95rem;font-weight:600;letter-spacing:.02em;color:#ffffffeb;white-space:nowrap}.constellation-hint{position:absolute;bottom:28px;left:50%;z-index:6;transform:translate(-50%);margin:0;padding:0;font-size:.95rem;font-weight:400;color:#ffffff8c;text-align:center;white-space:nowrap;pointer-events:none}.constellation-star-info{position:absolute;bottom:52px;left:50%;z-index:6;transform:translate(-50%);margin:0;min-height:0;font-size:.9rem;font-weight:600;color:#ffffffeb;text-align:center;pointer-events:none;text-shadow:0 0 12px rgba(0,0,0,.9)}.constellation-star-info:empty{display:none}.constellation-star-tooltip{position:absolute;z-index:8;pointer-events:none;padding:5px 10px;border-radius:6px;background:#000000b8;border:1px solid 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.15s}.constellation-tool svg{width:20px;height:20px}.constellation-tool:hover{background:#ffffff1f}.constellation-tool[aria-pressed=true]{background:#ffffff2e}.constellation-tool--color{width:34px;height:34px}.constellation-color-swatch{display:block;width:22px;height:22px;border-radius:50%;background:#b388ff;box-shadow:0 0 0 1px #ffffff40}.constellation-dialog{position:fixed;inset:0;z-index:1000;display:flex;align-items:center;justify-content:center;padding:16px;background:#000000b3}.constellation-dialog[hidden]{display:none}.constellation-dialog-panel{width:min(100%,320px);padding:24px;border-radius:14px;background:#111;border:1px solid rgba(255,255,255,.1)}.constellation-dialog-panel--wide{width:min(100%,480px)}.constellation-dialog-text{margin:0 0 16px;font-size:1rem;text-align:center;color:#ffffffe6}.constellation-name-input{display:block;width:100%;box-sizing:border-box;margin-bottom:16px;padding:10px 12px;border:1px solid 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6px}.constellation-tool{width:34px;height:34px}.constellation-hint{bottom:60px;font-size:.85rem;white-space:normal;max-width:80vw}}.reaction-test-page{flex:1;display:flex;flex-direction:column;min-height:0;background:#000}.reaction-test{position:relative;flex:1;display:flex;flex-direction:column;align-items:center;justify-content:center;min-height:0;padding:1.5rem;font-family:Courier New,Courier,Lucida Console,monospace;color:#3f3;background:radial-gradient(ellipse at center,#0e180e,#000 85%),repeating-linear-gradient(0deg,rgba(0,0,0,.25) 0px,rgba(0,0,0,.25) 1px,transparent 1px,transparent 3px);cursor:pointer;user-select:none;touch-action:manipulation;overflow:hidden;outline:none}.reaction-test:focus-visible{box-shadow:inset 0 0 0 2px #33ff3373}.reaction-test__rotate{position:fixed;inset:0;z-index:100;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:1rem;padding:2rem;text-align:center;font-family:Courier New,Courier,Lucida 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.reaction-test__shell{visibility:hidden;pointer-events:none}.reaction-test__crt{position:absolute;inset:0;pointer-events:none;opacity:.08;z-index:10;background:repeating-linear-gradient(0deg,rgba(255,255,255,.04) 0px,rgba(255,255,255,.04) 1px,transparent 1px,transparent 4px)}.reaction-test__shell{position:relative;z-index:2;width:100%;max-width:76rem;display:flex;flex-direction:column;gap:1.5rem}.reaction-test__header{display:flex;justify-content:space-between;align-items:center;border-bottom:3px double #33ff33;padding-bottom:.75rem}.reaction-test__brand{display:flex;align-items:center;text-decoration:none;pointer-events:auto}.reaction-test__logo{display:block;height:1.25rem;width:auto;filter:brightness(0) saturate(100%) invert(78%) sepia(52%) saturate(500%) 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#734}.sudoku__panel-emoji{margin:0 0 .5rem;font-size:2.25rem;line-height:1}.sudoku__panel-title{margin:0 0 .5rem;font-family:var(--font-heading, "Catamaran", sans-serif);font-size:1.5rem;font-weight:700;color:#734}.sudoku__panel-text{margin:0 0 1rem;font-family:var(--font-body, "Oxygen", sans-serif);font-size:.9rem;line-height:1.55;color:#463a48}.sudoku__panel-text--compact{margin-bottom:.85rem;font-size:.85rem}.sudoku__panel--diff{max-width:22rem;padding:1.25rem 1rem}.sudoku__diff-pick{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:.5rem;margin-bottom:.75rem;text-align:left}.sudoku__diff-opt{display:flex;flex-direction:column;align-items:flex-start;gap:.15rem;min-height:48px;padding:.55rem .65rem;border:2px solid rgba(119,51,68,.35);border-radius:10px;background:#fff;color:#0b0014;cursor:pointer;transition:background .15s ease,border-color .15s 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