:root{color-scheme:light dark;--page:light-dark(#f5f6f8,#11191f);--panel:light-dark(#fff,#1b252d);--ink:light-dark(#18212f,#e4ebf0);--muted:light-dark(#596579,#a8b6c1);--border:light-dark(#dde2e9,#35434e);--accent:light-dark(#176b58,#91ceb6);--accent-hover:light-dark(#115140,#b2e4cf);--hover:light-dark(#edf3f0,#293e36);--hover-border:light-dark(#afc4bb,#5e8876);--selected:light-dark(#eef5f1,#233d34);--secondary:light-dark(#82908e,#abc1b8);--error:light-dark(#b42318,#ffb4a6);--error-bg:light-dark(#fff0eb,#432a28)}:root[data-theme=light]{color-scheme:light}:root[data-theme=dark]{color-scheme:dark}:root{font:14px/1.45 -apple-system,BlinkMacSystemFont,Segoe UI,sans-serif;color:var(--ink);background:var(--page);font-synthesis:none;font-weight:400}*{box-sizing:border-box}body{margin:0}button,input,select{font:inherit}button,a,input,select,summary{outline-offset:3px}button:focus-visible,a:focus-visible,input:focus-visible,select:focus-visible,summary:focus-visible{outline:2px solid var(--accent)}button{min-height:36px;padding:7px 12px;border:1px solid var(--border);border-radius:8px;background:var(--panel);color:var(--ink);cursor:pointer;white-space:nowrap}button:hover:enabled{background:var(--hover);border-color:var(--hover-border)}button:disabled{opacity:.45;cursor:not-allowed}input,select{min-height:36px;min-width:0;border:1px solid var(--border);border-radius:8px;padding:7px 9px;background:var(--panel);color:inherit}input[type=number]{font-variant-numeric:tabular-nums}a{color:var(--accent)}h1,h2,p{margin:0}h1{font-size:20px;font-weight:600;letter-spacing:-.4px}h2{font-size:14px;font-weight:600}small,.muted{font-size:12px;color:var(--muted)}label{display:flex;flex-wrap:wrap;gap:6px;color:var(--muted);font-size:12px}label>input,label>select{width:100%;color:var(--ink);font-size:14px}label>span{margin-left:auto}.app{height:100dvh;min-height:620px;display:flex;flex-direction:column}.header{height:56px;min-height:56px;display:flex;align-items:center;gap:32px;padding:0 24px;border-bottom:1px solid var(--border);background:var(--panel)}.brand{text-decoration:none;font-size:20px;font-weight:650;letter-spacing:-.5px;color:var(--ink)}.brand span{color:var(--secondary);font-size:14px;font-weight:400;letter-spacing:0}.header-primary,.header nav{display:flex;gap:8px}.header nav{margin-left:auto}.header nav button{border:0;background:transparent;color:var(--muted)}.main-workspace{display:flex;min-height:0;flex:1;border-top:1px solid var(--border)}.sidebar{width:280px;min-width:280px;background:var(--panel);border-right:1px solid var(--border);overflow-y:auto;display:flex;flex-direction:column}.panel-title{padding:16px;display:flex;align-items:center;justify-content:space-between;gap:8px}.panel-title h2 span{font-size:12px;color:var(--muted);margin-left:6px;font-weight:400}.panel-title button{border:0;font-size:12px;padding:0;min-height:24px;color:var(--muted)}.parts-list{max-height:38vh;overflow:auto;flex-shrink:0}.part-row{display:flex;align-items:center;gap:8px;padding:4px 16px;border-left:3px solid transparent}.part-row.selected{background:var(--selected);border-left-color:var(--accent)}.part-select{display:flex;align-items:center;text-align:left;gap:12px;min-width:0;flex:1;padding:4px 0;border:0;background:transparent;white-space:normal}.part-select svg{width:36px;height:40px;flex-shrink:0}.part-select span{overflow-wrap:anywhere}.part-select small{display:block;font-size:11px}.part-row>input{width:55px;padding:5px;min-height:32px}.part-settings{padding:12px 16px;display:grid;gap:12px;border-top:1px solid var(--border);margin-top:8px}.row-actions{display:flex;gap:8px}.row-actions button{flex:1}.history{padding:8px 16px 16px}.settings{padding:16px;display:grid;gap:12px;border-top:1px solid var(--border);margin-top:auto}.settings>small{font-size:11px}.primary{background:var(--accent);color:var(--panel);border-color:var(--accent);font-weight:550}.primary:hover:enabled{background:var(--accent-hover);color:var(--panel);border-color:var(--accent-hover)}.run-button{min-height:42px;margin-top:4px}.text-button{border:0;min-height:24px;padding:0;color:var(--accent);background:transparent;white-space:normal}.drawing-panel{flex:1;min-width:0;display:flex;flex-direction:column}.check-mark{font-size:12px}.canvas-wrap{position:relative;flex:1;min-height:240px;overflow:hidden}.workspace-svg{display:block;width:100%;height:100%;position:absolute;top:0;right:0;bottom:0;left:0;touch-action:none}.canvas-tools{position:absolute;top:16px;right:16px;display:flex;gap:4px;z-index:1}.canvas-tools button{min-width:36px}.canvas-hint{position:absolute;left:16px;bottom:8px;margin:0;color:var(--muted);font-size:11px;pointer-events:none}.canvas-hint span{margin-left:12px}.result-details{padding:12px 16px;background:var(--panel);border-top:1px solid var(--border);display:grid;grid-template-columns:auto minmax(0,1fr);align-items:center;gap:8px 16px;font-size:12px;color:var(--muted)}.result-copy{min-width:0;display:flex;align-items:center;flex-wrap:wrap;gap:8px 16px}.result-copy p{margin:0;flex:1 1 380px;min-width:0;font-size:12px}.checked{color:var(--accent);font-weight:600}.result-details details{max-width:650px}.statusbar{display:flex;align-items:center;gap:16px;padding:12px 24px;min-height:60px;border-top:1px solid var(--border);background:var(--panel);flex-shrink:0}.run-status{font-size:12px;min-width:150px;display:flex;align-items:center;gap:8px;font-variant-numeric:tabular-nums}.run-status i{height:7px;width:7px;background:#9eaaa4;border-radius:50%}.metrics{display:flex;gap:24px;flex:1;align-items:center}.metrics span{font-size:11px;color:var(--muted)}.metrics strong{display:block;font-size:15px;font-weight:550;color:var(--ink);font-variant-numeric:tabular-nums}.error-banner{background:var(--error-bg);color:var(--error);padding:8px 24px;display:flex;align-items:center;gap:16px}.field-error{color:var(--error)}.header nav .mobile-settings{display:none}.modal-backdrop{position:fixed;top:0;right:0;bottom:0;left:0;background:#18212f55;display:flex;align-items:center;justify-content:center;padding:24px;z-index:5}.modal{background:var(--panel);border-radius:12px;padding:24px;width:520px;max-width:100%;max-height:90dvh;height:fit-content;overflow:auto;display:flex;flex-direction:column;gap:16px;box-shadow:0 16px 64px #18212f22}.modal>*{flex-shrink:0}.modal h2{font-size:20px}.modal p,.modal li{overflow-wrap:anywhere}.modal-actions{display:flex;justify-content:flex-end;gap:8px;margin-top:8px}.checkbox{display:flex;flex-wrap:nowrap;align-items:center;gap:8px}.checkbox input{width:auto;min-height:0}.modal ul{margin:0;padding-left:20px}.modal li+li{margin-top:6px}@media(max-width:1099px){.header{padding:0 16px;gap:16px}.header nav .mobile-settings{display:inline-flex}.sidebar:not(.open){display:none}.statusbar{padding:12px 16px;gap:12px;flex-wrap:wrap}.metrics{gap:16px}.canvas-hint span{display:none}}@media(max-width:699px){.app{height:auto;min-height:100dvh}.header{height:auto;min-height:56px;flex-wrap:wrap;gap:8px;padding:8px 16px}.brand-block{flex:1;min-width:0}.tagline{display:none}.brand span{display:inline}.header-primary{order:3;width:100%}.header-primary button{flex:1}.header nav{gap:0}.header nav button{padding:8px;font-size:12px}.main-workspace{flex-direction:column}.drawing-panel{order:0;height:420px;flex:none}.sidebar{order:1;width:100%;min-width:0;border-right:0;border-top:1px solid var(--border);overflow:visible}.sidebar:not(.open){display:none}.parts-list{max-height:230px}.settings{margin-top:0;grid-template-columns:1fr 1fr;gap:12px 16px}.settings>h2,.settings>.run-button,.settings>small,.settings>.text-button{grid-column:1/-1}.settings>label:nth-of-type(3){grid-column:1/-1}.part-settings{grid-template-columns:1fr}.statusbar{position:sticky;bottom:0;z-index:2;gap:8px;padding:8px 12px;box-shadow:0 -4px 16px #18212f08}.statusbar .run-status{min-width:0;width:100%}.statusbar .metrics{flex:1;gap:16px}.statusbar .metrics span:nth-child(3){display:none}.statusbar>button{font-size:12px}.statusbar .diagnostics-button{display:none}.metrics strong{font-size:14px}.result-details{max-height:120px;overflow:auto}.canvas-hint{max-width:80%;font-size:10px}.modal-backdrop{padding:12px}.modal{padding:20px;max-height:94dvh}button,input,select{min-height:44px}.part-row>input{min-height:44px}.canvas-tools button{min-width:44px}.panel-title button,.text-button{min-height:44px}}@media(prefers-reduced-motion:reduce){*,*:before,*:after{scroll-behavior:auto!important}}.canvas-hint kbd{padding:1px 4px;border:1px solid var(--border);border-radius:3px;background:var(--panel);font:10px ui-monospace,monospace;color:var(--ink)}.modal{border:1px solid var(--border);color:var(--ink)}.modal::backdrop{background:#18212f55}.modal:not([open]){display:none}.size-controls{display:grid;grid-template-columns:1fr 1fr;gap:8px}.size-controls>small{grid-column:1/-1}.add-shape{padding:8px 16px;display:flex;gap:8px}.add-shape>button{flex:1;padding:7px 8px}.polygon-actions{display:flex;align-items:center;gap:12px;padding:12px 16px;background:var(--panel);border-top:1px solid var(--border)}.result-mode{display:flex;gap:2px;flex-shrink:0;border:1px solid var(--border);border-radius:8px;padding:2px;background:var(--page)}.result-mode button{height:34px;min-height:34px;border:1px solid transparent;border-radius:6px;padding:5px 12px;background:transparent;font-size:13px;font-weight:550;transition:background .2s ease,color .2s ease,box-shadow .2s ease}.result-mode button[aria-pressed=false]{border-color:var(--border);color:var(--muted)}.result-mode button[aria-pressed=true]{background:var(--panel);color:var(--accent);box-shadow:0 1px 3px #18212f14}.live-label{font-weight:600;color:var(--accent)}.live-dot{display:inline-block;width:7px;height:7px;margin-right:6px;border-radius:50%;background:#e34e4e;transform-origin:center;animation:live-pulse 1.4s ease-out infinite}@keyframes live-pulse{0%{opacity:.8;transform:scale(.85);box-shadow:0 0 #e34e4e}70%{opacity:1;transform:scale(1);box-shadow:0 0 0 5px transparent}to{opacity:.8;transform:scale(.85);box-shadow:0 0 0 0 transparent}}.overlap-key{display:inline-block;width:9px;height:9px;margin-right:6px;border-radius:2px;background:#e34e4e}.rotation-control{display:flex;gap:8px;align-items:flex-end}.rotation-control>label{flex:1}.result-mode{background:transparent}.result-mode button[aria-pressed=true]{background:var(--page)}@media(max-width:699px){.result-details{grid-template-columns:1fr}.result-copy{display:grid;gap:8px}.result-mode button{min-height:44px;padding:4px 8px}.result-mode{padding:0;border:0}.statusbar .metrics{min-width:170px}.statusbar>select{margin-left:auto}}@media(prefers-reduced-motion:reduce){.live-dot{animation:none}}.brand-block{flex-shrink:0}.tagline{font-size:11px;color:var(--muted)}.solver-options{grid-column:1/-1;font-size:12px;color:var(--muted)}.solver-options summary{cursor:pointer;padding:6px 0}.solver-options label{margin:8px 0}.canvas-tools button[aria-pressed=true]{background:var(--accent);color:var(--panel);border-color:var(--accent)}:root{--material-fill:light-dark(#e7ecef,#111a21)}.quantity-error{flex-basis:100%;padding-left:0}.part-row:has(.quantity-error){flex-wrap:wrap}.quantity-total{font-size:12px;padding:8px 16px}.statusbar .run-button{margin:0}.import-parts{display:grid;gap:8px;max-height:240px;overflow:auto;border:1px solid var(--border);border-radius:8px;padding:8px}.import-parts>div{display:flex;gap:12px;align-items:center}.import-parts svg{width:52px;height:52px;flex:none}.import-parts small{display:block}.header{gap:16px}.header nav{align-items:center;gap:4px}.github-link{font-size:12px;white-space:nowrap;text-decoration:none;padding:8px}.header nav button{padding:7px 8px}.selection-panel{width:260px;min-width:260px;overflow-y:auto;background:var(--panel);border-left:1px solid var(--border)}.selection-panel .part-settings{margin:0;border:0;padding-top:0}.selection-panel .panel-title button{font-size:24px;min-width:32px}.statusbar{padding-left:0;gap:16px}.run-controls{width:280px;flex-shrink:0;padding:0 16px}.run-controls .run-button{width:100%;background:#fb923c;color:#23170c;border-color:#fb923c;font-weight:650}.run-controls .run-button:hover:enabled{background:#fdba74;border-color:#fdba74}.contact-links{display:grid;gap:14px}.contact-links a{display:flex;align-items:center;gap:10px;overflow-wrap:anywhere}.contact-links svg{width:20px;height:20px;flex:none}@media(min-width:700px)and (max-width:1099px){.header{height:auto;min-height:56px;flex-wrap:wrap;padding-block:8px;gap:8px 16px}.header nav{margin-left:auto}.main-workspace{position:relative}.selection-panel{position:absolute;right:12px;top:110px;bottom:12px;z-index:2;width:240px;min-width:240px;border:1px solid var(--border);border-radius:10px;box-shadow:0 8px 32px #0003}.statusbar{padding-left:0}}@media(max-width:699px){.header nav{width:100%;justify-content:space-between;flex-wrap:wrap}.header-primary{order:3}.github-link{padding:8px 0;font-size:11px}.selection-panel{order:0;width:100%;min-width:0;max-height:340px;border-left:0;border-top:1px solid var(--border)}.statusbar{padding:8px 12px}.run-controls{width:100%;padding:0;grid-template-columns:1fr 1fr;align-items:center;gap:12px}.statusbar .metrics{min-width:120px}}.header nav a,.header nav button{display:inline-flex;align-items:center;justify-content:center;gap:6px;min-height:36px;padding:7px 10px;border:1px solid transparent;border-radius:8px;font-size:12px;font-weight:500;line-height:20px;color:var(--muted);text-decoration:none;background:transparent}.header nav a:hover,.header nav button:hover{color:var(--ink);background:var(--hover);border-color:var(--hover-border)}.header nav span{width:16px;text-align:center;font-size:15px;line-height:1}@media(max-width:699px){.header nav{justify-content:flex-start;gap:0}.header nav a,.header nav button{min-height:44px;padding-inline:6px;font-size:11px}}@media(min-width:700px){.main-workspace{position:relative}.selection-panel{position:absolute;right:12px;top:128px;bottom:auto;max-height:calc(100% - 140px);z-index:2;border:1px solid var(--border);border-radius:10px;box-shadow:0 8px 32px #0003}}.export-actions{display:flex;align-items:center;gap:8px}.statusbar button,.statusbar select{height:42px;min-height:42px}.statusbar>.run-status{width:160px;min-width:160px;flex:none;gap:6px;white-space:nowrap}.status-symbol{width:28px;height:28px;display:grid;place-items:center;flex:none}.run-status i.active{width:12px;height:12px;border:2px solid var(--border);border-top-color:var(--accent);background:transparent;animation:spin .8s linear infinite}@keyframes spin{to{transform:rotate(360deg)}}@media(prefers-reduced-motion:reduce){.run-status i.active{animation:none}}@media(max-width:699px){.statusbar{display:grid;grid-template-columns:minmax(0,1fr) auto;gap:8px 12px}.statusbar .run-controls{width:auto;padding:0;display:block}.statusbar>.run-status{grid-column:2;grid-row:1;justify-self:end;width:auto;min-width:0;font-size:11px}.statusbar .metrics{grid-column:1;grid-row:2;min-width:0;gap:12px}.statusbar .export-actions{grid-column:2;grid-row:2;gap:6px}.statusbar .export-actions button{font-size:12px;padding-inline:8px}.statusbar button,.statusbar select{height:44px;min-height:44px}.statusbar .metrics strong{font-size:13px}}.project-bar{min-width:0;align-items:center;gap:8px}.project-menu{position:relative;min-width:0}.project-menu>summary{max-width:230px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;list-style:none;cursor:pointer;padding:8px 10px;border:1px solid var(--border);border-radius:8px;font-weight:550}.project-menu>div{position:absolute;left:0;top:calc(100% + 6px);min-width:180px;z-index:4;padding:6px;display:grid;gap:4px;background:var(--panel);border:1px solid var(--border);border-radius:10px;box-shadow:0 8px 24px #0003}.project-menu button{text-align:left;border:0}.project-status{max-width:100px;font-size:10px;line-height:1.3}.add-shape{flex-wrap:wrap}.add-shape>button{flex:1 1 40%}.import-formats{font-size:10px;color:var(--muted);padding:0 16px 8px}.drawing-panel{position:relative}.empty-project{position:absolute;left:50%;top:45%;transform:translate(-50%,-50%);width:min(330px,85%);padding:20px;text-align:center;background:var(--panel);border:1px solid var(--border);border-radius:12px}.empty-project p{font-size:12px;color:var(--muted);margin:8px 0 14px}.modal-actions{flex-wrap:wrap}@media(max-width:699px){.project-bar{flex-wrap:wrap}.project-menu{flex:1}.project-menu>summary{max-width:100%;min-height:44px;display:flex;align-items:center}.project-status{max-width:none;width:100%}.header .project-bar>button{flex:none}.project-menu>div{min-width:200px}.empty-project{top:50%}}.demo-badge{display:inline-block;margin-left:8px;padding:2px 5px;border:1px solid var(--border);border-radius:4px;font-size:10px;font-weight:500;letter-spacing:0;color:var(--muted);vertical-align:middle}.part-select .rotation-summary{font-size:10px;line-height:1.3}.header nav svg{flex:none}@media(min-width:700px)and (max-width:1299px){.header{height:auto;min-height:56px;flex-wrap:wrap;padding-block:8px;gap:8px 16px}.header nav{margin-left:auto}}.statusbar>.run-status{display:flex;flex-direction:column;align-items:flex-start;gap:0;white-space:normal}.run-state{display:flex;align-items:center;white-space:nowrap}.worker-status{font-size:10px;color:var(--muted);line-height:1.35}.header nav .hello-button{gap:10px;padding-inline:12px;color:var(--ink);background:color-mix(in srgb,var(--accent) 22%,var(--panel));border-color:color-mix(in srgb,var(--accent) 45%,var(--border))}.header nav .hello-button:hover{background:color-mix(in srgb,var(--accent) 34%,var(--panel));border-color:var(--accent)}.header nav .hello-button span{width:20px;flex:none}.workspace-svg:focus{outline:none}.workspace-svg:focus-visible{outline:1px solid var(--accent);outline-offset:-1px}.header{height:auto;flex-wrap:wrap;gap:12px;padding-block:8px}.header nav{flex-wrap:wrap}.project-menu>summary{font-size:14px;line-height:1.45;min-height:36px;padding:7px 12px}.header .theme-toggle{display:grid;place-items:center;padding:8px}.statusbar>.run-status{display:grid;grid-template-columns:32px minmax(0,1fr);column-gap:14px;align-items:center}.status-symbol{grid-column:1;grid-row:1 / span 2;width:32px;height:32px;transform:translate(-4px)}.run-state,.worker-status{grid-column:2}.run-status i.active{width:28px;height:28px;border-width:3px}.nesting-about{max-width:840px;margin:0 auto;padding:0 24px;border-top:1px solid var(--border);color:var(--ink)}.nesting-about>summary{min-height:44px;padding:12px 0;cursor:pointer;font-size:13px;color:var(--muted)}.nesting-about>section{line-height:1.65;padding-bottom:24px}.nesting-about h2{font-size:16px;margin-top:20px}.nesting-about p{margin-top:10px}.nesting-about ul{padding-left:22px}.nesting-about li+li{margin-top:8px}.hello-wave{display:inline-block;transform-origin:70% 75%;animation:hello-wave 1.4s ease-in-out}@keyframes hello-wave{0%,to{transform:rotate(0)}15%,45%,75%{transform:rotate(22deg)}30%,60%{transform:rotate(-12deg)}}@media(prefers-reduced-motion:reduce){.hello-wave{animation:none}}.empty-project-actions{display:flex;justify-content:center;flex-wrap:wrap;gap:8px}.remove-part{flex:none;display:grid;place-items:center;width:28px;min-height:32px;padding:4px;border:0;background:transparent;color:var(--muted)}.clear-unused{margin:8px 16px;text-align:left}.project-status{display:flex;align-items:center;gap:5px;min-width:100px}.project-status>span{flex:none;font-size:14px}.project-status[data-save-state=saved]{color:var(--accent)}.project-status[data-save-state=saving],.project-status[data-save-state=unsaved],.project-status[data-save-state=error]{color:light-dark(#a34b00,#ffb366)}.statusbar .run-controls{display:flex;gap:0}.run-controls .run-button{width:auto;flex:1;min-width:0}.run-controls:has(.skip-compression) .run-button{padding-inline:0}.run-controls:has(.skip-compression) .run-button:first-of-type{flex:4;border-radius:8px 0 0 8px}.run-controls .skip-compression{border-radius:0 8px 8px 0;background:#f6c995;color:#23170c;border-color:#f6c995;display:flex;align-items:center;justify-content:center}.run-controls .skip-compression:hover:enabled{background:#f9d9b2;border-color:#f9d9b2}.statusbar>.run-status{width:180px;min-width:180px;column-gap:10px}.run-state{gap:6px;flex-wrap:wrap;min-width:0;white-space:normal;line-height:1.4}.run-elapsed{white-space:nowrap;color:var(--muted)}@media(max-width:699px){.statusbar>.run-status{width:160px;min-width:0}.run-state{font-size:11px}.statusbar .run-controls{min-width:0}}.project-switch-actions{display:grid;gap:8px}.project-switch-actions button{width:100%;min-height:44px}.run-controls{position:relative}.compression-tooltip{display:none;position:absolute;bottom:calc(100% + 8px);left:16px;right:16px;z-index:10;padding:10px 12px;border:1px solid var(--border);border-radius:8px;background:var(--panel);color:var(--ink);box-shadow:0 4px 16px #0002;font-size:12px;line-height:1.45}.compression-tooltip strong{display:block;margin-bottom:4px}.run-controls:has(.skip-compression:hover) .compression-tooltip,.run-controls:has(.skip-compression:focus-visible) .compression-tooltip,.compression-tooltip:hover{display:block}.project-switch-actions .discard-project{background:#b93838;border-color:#b93838;color:#fff;font-weight:550}.project-switch-actions .discard-project:hover:enabled{background:#a52e2e;border-color:#a52e2e}.header{position:relative}.background-hint{position:absolute;left:50%;top:50%;transform:translate(-50%,-50%);white-space:nowrap;flex-shrink:0;padding:2px 6px;border:0;border-radius:4px;background:#b93838;color:#fff;font-size:11px;font-weight:600;line-height:1.4}@media(max-width:1700px){.header:has(.background-hint){height:auto;padding-bottom:32px;padding-top:8px}.header>.background-hint{top:auto;bottom:8px;transform:translate(-50%)}}.download-control{position:relative}.download-control .compression-tooltip{left:auto;right:0;width:240px;max-width:calc(100vw - 32px)}.download-control:hover .compression-tooltip,.download-control:focus-visible .compression-tooltip{display:block}