:root{color-scheme:dark;--bg:#0c1318;--panel:#111c23;--panel-soft:#15222a;--line:#25333b;--text:#ecece7;--muted:#8e9da5;--soft:#677d89;--amber:#e6bc7b;--teal:#84c7bd;--danger:#ea8e81;--font:Inter,"Segoe UI",system-ui,-apple-system,sans-serif;font-family:var(--font);background:var(--bg);color:var(--text);font-size:14px;line-height:1.5;font-synthesis:none}
*{box-sizing:border-box}body{margin:0}button,input,select{font:inherit}button{cursor:pointer}button,a,input,select{touch-action:manipulation}button{color:inherit}a{color:inherit;text-decoration:none}button:disabled{opacity:.3;cursor:default}button:focus-visible,a:focus-visible,input:focus-visible,select:focus-visible{outline:2px solid var(--amber);outline-offset:3px}button svg{pointer-events:none}button svg,.icon{width:17px;height:17px;display:block;flex:none}[hidden]{display:none!important}button{border:0}button,input,select{border-radius:5px}input,select{color:var(--text);background:#0d171d;border:1px solid var(--line)}select{cursor:pointer}option{background:#15222a}.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}
.app-header{height:83px;padding:0 clamp(20px,3vw,52px);display:flex;align-items:center;justify-content:space-between;border-bottom:1px solid var(--line);gap:22px;background:#0e171d}.brand{display:flex;align-items:center;gap:12px;font-weight:650;letter-spacing:.2em;font-size:17px;white-space:nowrap}.brand small{display:block;font-size:8px;color:var(--soft);letter-spacing:.18em;margin-top:3px;font-weight:500}.brand-icon{width:32px;height:33px;display:block;position:relative}.brand-icon b{width:14px;height:14px;position:absolute;display:block;border-radius:50%;background:var(--amber);left:0;top:3px}.brand-icon b:nth-child(2){background:var(--teal);left:17px;top:3px}.brand-icon b:nth-child(3){background:#f0eee7;left:9px;top:19px}.main-nav{display:flex;gap:5px;align-self:stretch;align-items:stretch}.main-nav a{position:relative;display:flex;align-items:center;gap:9px;color:var(--muted);padding:0 19px;font-size:13px;white-space:nowrap}.main-nav a.active{color:var(--text)}.main-nav a.active:after{content:"";position:absolute;left:19px;right:19px;bottom:-1px;height:2px;background:var(--amber)}.main-nav span{font-size:9px;background:#243239;border-radius:3px;padding:1px 5px;color:var(--muted)}.header-actions{display:flex;align-items:center;gap:24px}.text-button{display:flex;align-items:center;gap:9px;background:transparent;color:#adbac0;font-size:12px;padding:7px 0}.text-button:hover{color:var(--text)}.local-badge{font-size:10px;color:var(--soft);white-space:nowrap;display:flex;align-items:center;gap:7px}.local-badge i{width:5px;height:5px;border-radius:50%;background:var(--teal)}.mobile-help{display:none!important}
main{max-width:1700px;margin:0 auto;padding:29px clamp(18px,3vw,52px) 18px}.page-heading{display:flex;justify-content:space-between;gap:20px;align-items:flex-end;margin-bottom:26px}.eyebrow{font-size:9px;letter-spacing:.17em;color:var(--soft);margin:0 0 8px;font-weight:550}.page-heading h1{font-size:clamp(22px,2.1vw,31px);line-height:1.25;font-weight:450;letter-spacing:-.045em;margin:0}.mobile-break{display:none}.heading-actions{display:flex;gap:10px;padding-bottom:2px}.button{display:inline-flex;gap:9px;align-items:center;justify-content:center;min-height:39px;padding:9px 14px;font-size:12px;white-space:nowrap;transition:background .15s,transform .15s}.button:hover{transform:translateY(-1px)}.button.primary{background:var(--amber);color:#1d251f;font-weight:600}.button.primary:hover{background:#f0d19f}.button.secondary{background:#142129;border:1px solid #2a3a43;color:#d0d9da}.button.secondary:hover{background:#1e303a}.square-button{display:inline-flex;align-items:center;justify-content:center;width:32px;height:32px;flex:none;background:transparent;border:1px solid transparent;font-size:21px;color:#a2b3bc}.square-button:hover{background:#213139;color:var(--text)}.square-button svg{width:16px;height:16px}.inline-link{display:inline-flex;align-items:center;gap:6px;background:transparent;color:var(--muted);font-size:11px;padding:4px 0}.inline-link:hover{color:var(--amber)}.inline-link svg{width:13px;height:13px}
.laboratory{display:grid;grid-template-columns:198px minmax(0,1fr) 232px;gap:14px;align-items:start}.materials-panel,.environment-panel{background:var(--panel);border:1px solid var(--line);border-radius:8px;overflow:hidden}.panel-heading{display:flex;align-items:center;gap:9px;padding:16px 15px 13px}.panel-heading h2{font-size:13px;font-weight:550;margin:0}.panel-heading>span{font-size:10px;color:var(--soft);margin-left:auto}.panel-close{display:none}.search-field{display:flex;align-items:center;gap:7px;margin:0 12px 11px;padding:8px 10px;background:#0d171d;border:1px solid var(--line);border-radius:5px;color:var(--soft)}.search-field svg{width:13px;height:13px}.search-field input{background:none;border:0;font-size:11px;min-width:0;width:100%;outline:none;padding:0}.search-field input::placeholder{color:#70848e}.search-field:focus-within{border-color:var(--teal)}.search-field input::-webkit-search-cancel-button{appearance:none}.category-list{display:flex;gap:4px;flex-wrap:wrap;padding:0 12px 12px}.category-list button{font-size:9px;background:transparent;color:#8a9ca6;padding:4px 6px;border:1px solid #283842;border-radius:3px;min-height:24px}.category-list button.active{background:#d9b77e;color:#172026;border-color:#d9b77e}.material-list{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:5px;padding:0 11px 13px;max-height:405px;overflow:auto;scrollbar-width:thin;scrollbar-color:#3a515d transparent;align-content:start;min-height:210px}.material-button{display:flex;flex-direction:column;align-items:flex-start;justify-content:center;position:relative;gap:6px;padding:10px 9px;min-height:62px;background:#14222a;border:1px solid #273842;border-radius:5px;text-align:left;transition:border-color .15s,background .15s}.material-button:hover{background:#1d2e35;border-color:#527078}.material-button.active{background:#292c26;border-color:#b8a06e}.material-button .material-name{font-size:10px;font-weight:450;line-height:1.25;overflow-wrap:anywhere}.material-button .material-symbol{position:absolute;top:9px;right:7px;font-size:9px;color:#8a9ba4;font-family:ui-monospace,SFMono-Regular,monospace}.material-swatch,.mini-swatch{display:inline-block;width:14px;height:14px;background:var(--swatch,#d8be89);border-radius:3px;box-shadow:inset 0 0 0 1px #ffffff15;flex:none}.material-button .material-swatch{width:16px;height:12px}.selected-material{padding:15px 13px;border-top:1px solid var(--line);background:#131e24;min-height:154px}.material-heading{display:flex;align-items:center;gap:9px}.material-heading .material-swatch{width:25px;height:25px}.material-heading strong{display:block;font-weight:500;font-size:12px}.material-heading small{font-size:9px;color:var(--muted)}.material-formula{font-size:10px;font-family:ui-monospace,SFMono-Regular,monospace;color:var(--soft);margin-left:auto}.selected-material p{font-size:10px;line-height:1.65;color:#99aab2;margin:11px 0 7px}.selected-material .inline-link{font-size:10px;justify-content:space-between;width:100%}.loading-note{font-size:11px;color:var(--muted);padding:20px 0;grid-column:1/-1}
.workspace{min-width:0;background:var(--panel);border:1px solid var(--line);border-radius:8px;overflow:hidden}.simulation-toolbar{height:54px;padding:0 14px;display:flex;align-items:center;justify-content:space-between;gap:12px;background:#142027;border-bottom:1px solid var(--line)}.time-controls,.history-controls{display:flex;align-items:center;gap:4px}.play-button{display:flex;align-items:center;gap:7px;padding:7px 9px;background:#233b3d;color:var(--teal);border:1px solid #365051;min-height:32px;font-size:11px}.play-button svg{width:13px;height:13px}.play-button.paused{background:#363323;color:var(--amber);border-color:#65583a}.toolbar-divider{height:20px;width:1px;display:inline-block;background:#2a3a42;margin:0 5px;flex:none}.speed-select select{border:0;background:transparent;font-size:11px;padding:3px;width:48px}.canvas-viewport{position:relative;aspect-ratio:5/3;background:#090f14;overflow:hidden;min-width:0;isolation:isolate}.canvas-viewport:before{content:"";position:absolute;inset:0;pointer-events:none;background-image:radial-gradient(#50687828 .6px,transparent .6px);background-size:16px 16px;z-index:-1}#world-canvas,#overlay-canvas{display:block;position:absolute;inset:0;width:100%;height:100%;touch-action:none}#world-canvas{image-rendering:pixelated;image-rendering:crisp-edges}#overlay-canvas{cursor:crosshair;z-index:2}.scene-label{position:absolute;top:16px;left:16px;display:flex;align-items:center;gap:7px;font-size:11px;z-index:3;pointer-events:none;text-shadow:0 1px 3px #000}.live-dot{width:5px;height:5px;background:var(--teal);border-radius:50%}.scene-label>span:last-child{font-size:8px;color:#8599a5;letter-spacing:.07em;margin-left:5px}.view-select{position:absolute;top:9px;right:9px;display:flex;align-items:center;gap:5px;z-index:4}.view-select select{border:1px solid #33434d;background:#101b24d9;font-size:10px;padding:6px 23px 6px 8px;max-width:145px;appearance:none;background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='10' height='10'%3E%3Cpath d='m2 3 3 3 3-3' fill='none' stroke='%2397aab5'/%3E%3C/svg%3E");background-repeat:no-repeat;background-position:right 7px center}.view-select .square-button{width:29px;height:29px;background:#101b24d9;border:1px solid #33434d;font-size:9px}.canvas-tip{position:absolute;bottom:13px;left:50%;transform:translateX(-50%);z-index:4;display:flex;align-items:center;gap:5px;padding:6px 9px;background:#0b141ddc;border:1px solid #35404877;border-radius:5px;font-size:9px;color:#a0b3be;white-space:nowrap;backdrop-filter:blur(8px)}.canvas-tip button{font-size:14px;line-height:1;padding:2px;background:transparent;color:var(--muted);margin-left:4px}.canvas-loading{position:absolute;inset:0;display:flex;align-items:center;justify-content:center;gap:12px;flex-direction:column;background:#0b1318;z-index:6}.canvas-loading strong{font-size:14px;font-weight:500}.canvas-loading>span:last-child{font-size:10px;color:var(--muted)}.loading-orbit{width:40px;height:40px;border:1px solid #37554f;border-top-color:var(--teal);border-radius:50%;animation:spin 1.1s linear infinite}@keyframes spin{to{transform:rotate(360deg)}}.field-legend{position:absolute;left:16px;bottom:16px;display:flex;align-items:center;gap:8px;z-index:3;font-size:9px;color:#cad6da;pointer-events:none;text-shadow:0 1px 3px #000}.field-legend>div{width:125px;height:5px;background:linear-gradient(90deg,#1c3d85,#2ca9be,#81d3b4,#f3c45e,#f0683d,#f2ece5);border-radius:2px}
.drawing-toolbar{border-top:1px solid var(--line);padding:10px 12px;display:flex;justify-content:space-between;align-items:center;gap:10px;background:#142027}.drawing-tools{display:flex;align-items:center;gap:3px}.tool{display:flex;align-items:center;justify-content:center;width:31px;height:32px;border:1px solid transparent;background:transparent;color:#8297a3;flex:none}.tool svg{width:15px;height:15px}.tool:hover{background:#253641;color:#d9e0e0}.tool.active{background:#38372d;color:var(--amber);border-color:#79694a}.tool.thermal{color:#d8957c}.tool.cool{color:#80baca}.brush-size{display:flex;gap:9px;align-items:center;font-size:10px;color:var(--muted);white-space:nowrap}.brush-size input{width:65px}.brush-size output{width:17px;text-align:right;font-family:ui-monospace,monospace;color:#c5d4da}.simulation-stats{display:flex;align-items:center;gap:12px;padding:11px 14px;border-top:1px solid var(--line);color:#6f8795;font-size:9px;flex-wrap:wrap}.simulation-stats>span{white-space:nowrap}.simulation-stats b{font-weight:450;color:#afc3cd;font-variant-numeric:tabular-nums}.stats-dot{width:4px;height:4px;border-radius:50%;background:var(--teal);display:inline-block;margin-right:6px}.stats-spacer{flex:1}.simulation-stats .inline-link{font-size:9px}.reaction-log{border-top:1px solid var(--line);display:flex;gap:15px;padding:14px;min-height:91px;background:#0e191f}.log-heading{display:flex;align-items:center;gap:6px;align-self:flex-start;font-size:10px;color:#9db1bc;white-space:nowrap}.log-heading svg{width:12px;height:12px;color:var(--teal)}#reaction-events{font-size:10px;color:#a1b5b9;display:flex;flex-direction:column;gap:5px;line-height:1.6;min-width:0;max-height:86px;overflow:auto;scrollbar-width:thin}.log-empty{color:#6a818d;font-size:10px}.reaction-entry{display:flex;gap:6px}.reaction-entry time{color:#5e7989;font-variant-numeric:tabular-nums;flex:none}
.reset-env{margin-left:auto;display:flex;align-items:center;background:transparent;color:#8298a3;padding:2px}.reset-env svg{width:13px;height:13px}.environment-preset{margin:0 13px 19px;display:flex;gap:4px;padding:3px;background:#0e181e;border:1px solid var(--line);border-radius:5px}.environment-preset button{flex:1;background:transparent;color:#8da2ac;font-size:10px;min-height:27px;padding:3px 4px;white-space:nowrap}.environment-preset button.active{background:#253c3c;color:var(--teal)}.environment-controls{padding:0 15px}.environment-control{display:block;margin-bottom:15px}.environment-control>span{display:flex;align-items:center;justify-content:space-between;gap:6px;margin-bottom:7px;font-size:10px}.environment-control b{font-weight:450;color:#b5c3c8}.environment-control output{font-variant-numeric:tabular-nums;font-family:ui-monospace,SFMono-Regular,monospace;color:var(--teal);font-size:10px}.environment-control input{display:block;width:100%;margin:0}.environment-control small{display:flex;justify-content:space-between;gap:5px;font-size:8px;color:#526f80;margin-top:4px}.environment-control small span:nth-child(2):not(:last-child){font-size:7px}input[type=range]{appearance:none;-webkit-appearance:none;height:3px;background:#2c3f49;border:none;border-radius:3px;accent-color:var(--teal);outline-offset:7px;cursor:pointer}input[type=range]::-webkit-slider-thumb{appearance:none;width:9px;height:9px;border-radius:50%;background:var(--teal);border:2px solid #c5dfd6;box-shadow:0 0 0 4px #81c9bd0c}input[type=range]::-moz-range-thumb{width:8px;height:8px;border-radius:50%;background:var(--teal);border:1px solid #c5dfd6}.boundary-control{display:flex;align-items:center;justify-content:space-between;gap:10px;font-size:10px;color:#9cafb7;padding:0 14px 16px}.boundary-control select{font-size:10px;padding:4px 6px;max-width:105px}.inspector{background:#0e191f;border-top:1px solid var(--line);padding:13px 14px}.inspector-heading{display:flex;align-items:center;gap:6px}.inspector-heading h3{font-size:9px;font-weight:450;color:#99acb6;margin:0}.inspector-heading svg{width:12px;height:12px;color:var(--teal)}.inspector-heading>span:last-child{margin-left:auto;font-size:8px;color:#59788a;font-family:ui-monospace,monospace}.inspector>strong{font-size:12px;font-weight:450;display:block;margin:11px 0 10px}.inspector dl{font-size:10px;display:flex;flex-direction:column;gap:6px;margin:0}.inspector dl>div{display:flex;justify-content:space-between;gap:8px}.inspector dt{color:#6c8997}.inspector dd{margin:0;color:#aec1ca;font-variant-numeric:tabular-nums}.inspector p{font-size:9px;line-height:1.6;color:#5d7c8e;margin:11px 0 0}.model-note{display:flex;align-items:center;gap:9px;padding:12px 14px;background:#15232a;border-top:1px solid var(--line);color:#96b2bb;font-size:10px;width:100%;text-align:left;border-radius:0}.model-note svg{width:13px;height:13px}.model-note small{font-size:8px;color:#587a8b}.model-note>span:last-child{margin-left:auto}.under-lab{display:flex;justify-content:space-between;gap:16px;margin-top:15px;font-size:10px;color:#4e6b7b}.under-lab .inline-link{font-size:9px;color:#6a8999}.under-lab kbd{font-size:9px;padding:0 5px;background:#192a33;border:1px solid #314855;border-radius:3px;margin-left:5px}.mobile-panels{display:none}.panel-backdrop{position:fixed;inset:0;background:#030a11a6;z-index:30;backdrop-filter:blur(4px)}
.atlas-heading{padding:8px 0 26px}.atlas-heading h1{font-size:30px;font-weight:450;letter-spacing:-.04em;margin:5px 0 10px}.atlas-heading>p:last-child{color:var(--muted);font-size:12px;margin:0}#atlas-frame{width:100%;height:1100px;border:1px solid var(--line);border-radius:10px;background:#080d16;display:block}
dialog{color:var(--text);background:#121e25;border:1px solid #374650;border-radius:12px;padding:27px;max-width:min(690px,calc(100vw - 28px));width:100%;max-height:85vh;overflow-y:auto;scrollbar-width:thin;box-shadow:0 25px 100px #0008}dialog::backdrop{background:#030a12b5;backdrop-filter:blur(8px)}.dialog-heading{display:flex;justify-content:space-between;align-items:flex-start;gap:20px;margin-bottom:15px}.dialog-heading h2{font-weight:450;font-size:25px;line-height:1.2;letter-spacing:-.035em;margin:0}.dialog-heading .square-button{margin-top:-6px;margin-right:-5px}.dialog-intro{font-size:12px;color:#9bb0bc;line-height:1.8;margin:0 0 23px}.dialog-footnote{color:#6d8798;font-size:10px;margin:20px 0 0}.preset-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:11px}.preset-card{background:#16262f;border:1px solid #2b404c;border-radius:7px;text-align:left;overflow:hidden;padding:0;transition:border-color .15s,transform .15s}.preset-card:hover{border-color:var(--teal);transform:translateY(-2px)}.preset-art{height:94px;position:relative;overflow:hidden;background:#0d1922;display:block}.preset-art canvas{width:100%;height:100%;display:block;image-rendering:pixelated}.preset-card h3{font-size:13px;margin:12px 13px 5px;font-weight:500}.preset-card p{font-size:10px;line-height:1.7;color:#8ea8b4;margin:0 13px 14px;min-height:34px}.preset-card .preset-num{position:absolute;left:11px;top:8px;font-size:9px;letter-spacing:.09em;color:#c6d6db;background:#0e1b2490;padding:2px 6px;border-radius:3px}.dialog-footer{display:flex;justify-content:flex-end;gap:10px;margin-top:20px}.form-label{font-size:12px;color:#b8c9d2;display:flex;flex-direction:column;gap:9px;margin:22px 0 14px}.form-label input{padding:12px;font-size:15px}.help-dialog{max-width:min(760px,calc(100vw - 28px))}.help-tabs{display:flex;gap:6px;border-bottom:1px solid var(--line);margin-top:20px;padding-bottom:12px}.help-tabs button{padding:7px 12px;border:1px solid transparent;background:transparent;color:var(--muted);font-size:12px}.help-tabs button.active{background:#25413f;color:var(--teal);border-color:#365653}.help-content{padding-top:18px;color:#a5bac4;font-size:12px;line-height:1.85;min-height:220px}.help-content h3{font-size:15px;font-weight:500;margin:20px 0 8px;color:#e1e8e8}.help-content h3:first-child{margin-top:0}.help-content p{margin:0 0 13px}.help-content strong{font-weight:550;color:#dce6e5}.help-content a{color:var(--teal);text-decoration:underline;text-underline-offset:3px}.help-content table{width:100%;border-collapse:collapse;font-size:11px}.help-content td,.help-content th{text-align:left;padding:10px 9px;border-bottom:1px solid var(--line);vertical-align:top}.help-content th{font-weight:500;color:#b4c6ce}.help-content kbd{background:#21333e;color:#d5e0e3;border:1px solid #38515f;padding:2px 6px;border-radius:3px;font-size:10px;white-space:nowrap}.help-note{padding:13px 15px;background:#26332e;border-left:2px solid var(--teal);color:#b6cbc6;margin:15px 0}.saved-item{padding:15px 0;border-bottom:1px solid var(--line);display:flex;align-items:center;gap:12px}.saved-item>div{min-width:0;flex:1}.saved-item h3{font-size:14px;font-weight:450;overflow-wrap:anywhere;margin:0 0 4px}.saved-item small{font-size:10px;color:var(--muted)}.saved-empty{padding:35px 12px;text-align:center;color:var(--muted);font-size:13px}.toast{position:fixed;left:50%;bottom:27px;transform:translateX(-50%);display:flex;align-items:center;justify-content:space-between;gap:20px;border:1px solid #52736d;background:#1b302e;color:#c9e1db;padding:13px 15px;border-radius:7px;box-shadow:0 10px 50px #0006;z-index:100;max-width:min(550px,calc(100vw - 32px));font-size:12px}.toast button{background:none;color:#a8c4c2;font-size:18px;line-height:1}.error-message{font-size:12px;line-height:1.7;color:var(--danger);padding:20px}
.laboratory:fullscreen{background:var(--bg);padding:18px;align-content:center;overflow:auto}.laboratory:fullscreen .canvas-viewport{max-height:calc(100dvh - 200px);aspect-ratio:5/3}.laboratory:fullscreen .under-lab{display:none}
@media(min-width:1600px){.laboratory{grid-template-columns:220px minmax(0,1fr) 250px;gap:17px}.material-list{max-height:460px}.material-button{min-height:68px}.environment-control{margin-bottom:20px}.simulation-toolbar{height:57px}.drawing-toolbar{padding:12px 14px}.canvas-viewport{aspect-ratio:5/3;max-height:590px}.material-name{font-size:12px!important}}
@media(max-width:1350px){.header-actions .local-badge{display:none}.laboratory{grid-template-columns:180px minmax(0,1fr) 210px;gap:10px}main{padding:25px 24px 18px}.app-header{padding:0 24px}.drawing-toolbar{flex-wrap:wrap;gap:7px;padding:9px}.brush-size{margin-left:auto}.canvas-tip span{display:none}.scene-label>span:last-child{display:none}.material-list{padding:0 9px 12px;gap:4px}.material-button{padding:9px 7px}.selected-material{padding:13px 11px}.environment-controls{padding:0 13px}.simulation-stats{gap:8px;padding:10px;font-size:8px}.simulation-stats .inline-link{font-size:8px}.reaction-log{flex-direction:column;gap:6px;padding:11px}.page-heading h1{font-size:25px}.main-nav a{padding:0 13px}.main-nav a.active:after{left:13px;right:13px}.environment-control{margin-bottom:15px}.material-list{max-height:400px}}
@media(max-width:1050px){main{padding:23px 22px 80px}.laboratory{display:block}.materials-panel,.environment-panel{display:none}.workspace{width:100%}.mobile-panels{display:flex;align-items:center;gap:10px;position:fixed;z-index:20;bottom:12px;left:50%;transform:translateX(-50%);background:#1a292ff2;border:1px solid #3b4b51;padding:5px;border-radius:9px;box-shadow:0 8px 35px #0006;backdrop-filter:blur(12px)}.mobile-panels>button{display:flex;align-items:center;gap:9px;background:transparent;color:#c8d5d8;padding:8px 14px;font-size:12px;white-space:nowrap;min-height:35px}.mobile-panels>button:last-child{border-left:1px solid #3a4c55;border-radius:0}.mobile-panels>button>span:last-child{color:#7993a1;margin-left:4px}.mobile-panels .icon{width:14px;height:14px}.panel-open{display:block!important;position:fixed;bottom:0;left:50%;transform:translateX(-50%);width:min(500px,100%);max-height:80dvh;overflow-y:auto;border-radius:14px 14px 0 0;z-index:40;box-shadow:0 -20px 80px #0006;padding-bottom:env(safe-area-inset-bottom);scrollbar-width:thin}.panel-open .panel-heading{position:sticky;top:0;background:var(--panel);z-index:5;padding:18px 17px}.panel-close{display:flex;margin-left:auto;min-width:32px}.panel-open .panel-heading>span{margin-left:4px}.panel-open .reset-env{margin-left:5px}.panel-open .material-list{grid-template-columns:repeat(4,minmax(0,1fr));max-height:36dvh;padding:0 16px 16px;min-height:130px}.panel-open .material-button{min-height:62px}.panel-open .category-list{padding:0 16px 15px;gap:6px}.panel-open .category-list button{font-size:11px;padding:6px 8px}.panel-open .search-field{margin:0 16px 14px;padding:12px}.panel-open .search-field input{font-size:16px}.panel-open .selected-material{min-height:0;padding:15px 17px}.panel-open .selected-material p{font-size:11px}.panel-open .environment-controls{display:grid;grid-template-columns:1fr 1fr;gap:0 28px;padding:4px 20px 0}.panel-open .environment-control{margin-bottom:24px}.panel-open .environment-control>span{font-size:12px}.panel-open .environment-control output{font-size:11px}.panel-open .environment-control small{font-size:10px;margin-top:8px}.panel-open .environment-control input{height:4px;margin:12px 0}.panel-open .environment-control input::-webkit-slider-thumb{width:16px;height:16px}.panel-open .inspector{padding:18px}.panel-open .inspector dl{font-size:12px}.panel-open .inspector-heading h3{font-size:12px}.panel-open .inspector>strong{font-size:15px}.panel-open .model-note{padding:16px 18px}.header-actions .text-button{font-size:11px}.main-nav{margin-left:auto}.drawing-toolbar{flex-wrap:nowrap;padding:12px 14px}.tool{width:37px;height:36px}.tool svg{width:17px;height:17px}.brush-size input{width:90px}.canvas-viewport{aspect-ratio:5/3;max-height:540px}.simulation-toolbar{height:56px}.simulation-stats{font-size:10px;padding:12px 15px;gap:15px}.simulation-stats .inline-link{font-size:10px}.reaction-log{flex-direction:row;gap:15px;padding:15px}.reaction-log #reaction-events{font-size:11px}.toast{bottom:82px}.laboratory:fullscreen .materials-panel,.laboratory:fullscreen .environment-panel{display:none}.laboratory:fullscreen .canvas-viewport{max-height:none}.scene-label>span:last-child{display:inline}}
@media(max-width:700px){.app-header{height:auto;min-height:104px;padding:15px 18px 0;gap:8px;flex-wrap:wrap;position:relative}.brand{font-size:15px;gap:10px}.brand small{font-size:7px}.brand-icon{transform:scale(.85);transform-origin:left center;width:28px}.main-nav{order:3;flex-basis:100%;margin:3px 0 0;height:42px;gap:16px}.main-nav a{padding:0 2px;font-size:12px}.main-nav a.active:after{left:0;right:0}.main-nav span{font-size:8px}.header-actions .text-button{display:none}.mobile-help{display:flex!important;width:30px;height:30px;border:1px solid #30434d;font-size:15px}.page-heading{align-items:flex-start;margin-bottom:18px;flex-direction:column;gap:16px}.page-heading h1{font-size:26px;line-height:1.22}.page-heading .eyebrow{font-size:8px}.mobile-break{display:block}.heading-actions{display:flex;justify-content:space-between;width:100%;gap:8px}.heading-actions .button{font-size:11px;min-height:37px;padding:8px 11px}.heading-actions svg{width:14px;height:14px}main{padding:21px 14px 86px}.simulation-toolbar{padding:0 8px;height:49px;gap:4px}.time-controls,.history-controls{gap:1px}.play-button{font-size:10px;padding:7px}.square-button{width:29px;height:30px}.toolbar-divider{margin:0 4px}.canvas-viewport{aspect-ratio:5/3;min-height:240px}.scene-label{top:14px;left:11px;font-size:10px}.scene-label>span:last-child{display:none}.view-select{top:8px;right:7px;gap:4px}.view-select select{font-size:9px;max-width:125px}.canvas-tip{font-size:8px;bottom:10px;padding:6px 8px;gap:2px}.canvas-tip span{display:none}.drawing-toolbar{padding:9px 7px;flex-wrap:wrap;justify-content:flex-start;gap:8px}.drawing-tools{justify-content:space-between;width:100%;gap:1px}.tool{width:32px;height:33px}.tool svg{width:16px;height:16px}.brush-size{margin-left:0;justify-content:space-between;width:100%;padding:4px 6px 0;font-size:11px}.brush-size input{width:auto;flex:1;max-width:180px;height:4px}.brush-size input::-webkit-slider-thumb{width:13px;height:13px}.simulation-stats{padding:10px;gap:10px;font-size:9px}.simulation-stats .inline-link{font-size:9px}.simulation-stats svg{width:12px;height:12px}.stats-spacer{display:none}.simulation-stats>span:nth-child(3){margin-right:auto}.simulation-stats .inline-link{min-height:24px}.reaction-log{flex-direction:column;gap:7px;padding:11px;min-height:98px}.log-heading{font-size:10px}.reaction-log #reaction-events{font-size:10px}.under-lab{align-items:flex-start;font-size:9px;line-height:1.7;padding:0 2px}.under-lab>span{max-width:200px}.under-lab .inline-link{font-size:0}.under-lab kbd{font-size:12px;margin:0}.panel-open .material-list{grid-template-columns:repeat(3,minmax(0,1fr))}.panel-open .environment-controls{gap:0 20px;padding:4px 17px 0}.panel-open .environment-control>span{font-size:10px}.panel-open .environment-control output{font-size:10px}.panel-open .environment-control small{font-size:8px}.panel-open .environment-control small span:nth-child(2):not(:last-child){font-size:7px}.atlas-heading h1{font-size:25px}.atlas-heading>p:last-child{font-size:11px;line-height:1.7}#atlas-frame{border-radius:8px}.atlas-heading{padding:0 3px 20px}.preset-grid{gap:9px}.preset-art{height:75px}.preset-card h3{font-size:12px;margin:10px 11px 5px}.preset-card p{margin:0 11px 12px;font-size:9px}dialog{padding:21px 17px;max-height:87dvh}.dialog-heading h2{font-size:22px}.dialog-intro{font-size:11px}.help-content{font-size:12px}.help-tabs{gap:2px}.help-tabs button{padding:7px 9px;font-size:11px}.help-content table{font-size:10px}.help-content td,.help-content th{padding:9px 6px}.saved-item .button{font-size:10px;padding:7px 10px}.field-legend{font-size:8px;bottom:13px;left:12px;gap:6px}.field-legend>div{width:90px}.laboratory:fullscreen{padding:7px;display:flex;flex-direction:column;justify-content:center}.laboratory:fullscreen .workspace{flex:1;display:flex;flex-direction:column}.laboratory:fullscreen .canvas-viewport{flex:1;aspect-ratio:auto;min-height:200px}.laboratory:fullscreen .reaction-log{display:none}}
@media(max-width:370px){.simulation-toolbar .toolbar-divider{margin:0 2px}.square-button{width:26px}.play-button{padding:7px 5px}.speed-select select{width:41px}.history-controls .square-button svg{width:14px}.simulation-stats{gap:8px}.simulation-stats .import-label{display:none}.page-heading h1{font-size:24px}.tool{width:29px}.material-button .material-name{font-size:11px}}
@media(prefers-reduced-motion:reduce){*{scroll-behavior:auto!important;animation-duration:.001ms!important;transition-duration:.001ms!important}}
.canvas-viewport{width:100%}
.render-toolbar{display:flex;align-items:center;gap:17px;min-height:39px;padding:6px 14px;border-bottom:1px solid var(--line);background:#101b22;font-size:10px;color:#8ea9b6}
.render-toolbar label{display:flex;align-items:center;gap:7px;min-width:0}
.render-toolbar select{padding:4px 20px 4px 7px;font-size:10px;min-height:27px;background:#192931;border-color:#30454f}
.performance-status{margin-left:auto;color:#739b93;font-size:9px;white-space:nowrap;font-variant-numeric:tabular-nums}
.main-nav .new-badge{color:var(--amber);background:#2e2a20;font-size:7px;letter-spacing:.04em}
#cosmos-frame{width:100%;height:1150px;border:1px solid var(--line);border-radius:10px;background:#080e18;display:block}
.material-button .material-swatch{box-shadow:inset -3px -3px #0002,inset 2px 2px #fff2}
@media(max-width:1350px){.render-toolbar{gap:10px;padding:6px 10px}.render-toolbar label{gap:5px}.performance-status{font-size:8px}.main-nav a{padding:0 10px}}
@media(max-width:700px){.main-nav{gap:16px}.main-nav a{padding:0 2px;font-size:11px}.main-nav .new-badge{display:none}.render-toolbar{padding:6px 9px;gap:12px;min-height:39px}.render-toolbar label{font-size:9px;gap:6px}.render-toolbar select{font-size:10px;padding:4px 5px;max-width:100px}.performance-status{display:none}#cosmos-frame{border-radius:8px}.cosmos-heading{padding-bottom:16px}}