:root{font-family:system-ui,-apple-system,Segoe UI,sans-serif;line-height:1.5;font-weight:400;font-synthesis:none;text-rendering:optimizeLegibility;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}body{margin:0;min-width:320px;min-height:100vh}#root{min-height:100vh}button:focus-visible,a:focus-visible,input:focus-visible{outline:2px solid #7650c5;outline-offset:3px}@media (prefers-reduced-motion: reduce){*,*:before,*:after{animation:none!important;transition:none!important}}.chemistry-tools{display:grid;gap:7px;font-size:12px}.chemistry-tools button,.chemistry-tools select,.chemistry-tools input,.chemistry-tools textarea{font-family:inherit;font-size:11px;color:var(--chem-text);background:var(--chem-bg);border:1px solid var(--chem-border);border-radius:6px;padding:6px 8px;max-width:100%;box-sizing:border-box}.chemistry-tools button{cursor:pointer}.chemistry-tools button:hover{border-color:var(--chem-accent)}.chemistry-tools button:disabled{opacity:.5;cursor:default}.chemistry-tools summary{color:var(--chem-text)}.chemistry-tools details>button{margin:3px 3px 3px 0}.chemistry-tools label{display:block;line-height:1.8}.chemistry-tools select{margin-left:4px}.editor-menu-trigger{border:0;border-radius:7px;padding:10px 12px;font:inherit;font-size:16px;cursor:pointer;white-space:nowrap}.editor-menu-trigger:hover{background:#eee6fa!important;color:#49317d!important}.editor-popover{position:fixed;z-index:3000;padding:20px;box-sizing:border-box;border:1px solid var(--chem-border);border-radius:12px;box-shadow:0 12px 40px #25134430;max-height:calc(100dvh - 80px);overflow-y:auto;font-size:15px;gap:12px}.editor-popover button,.editor-popover input,.editor-popover select,.editor-popover textarea{font-size:14px;padding:9px 12px}.editor-popover-heading{display:flex;align-items:center;justify-content:space-between;font-size:19px}.editor-popover details{padding:8px 0;border-bottom:1px solid var(--chem-border)}.editor-popover summary{font-size:16px;font-weight:600;cursor:pointer}.editor-popover details[open]>summary{margin-bottom:12px}.element-grid{display:grid;grid-template-columns:repeat(5,1fr);gap:8px}.element-grid button{padding:10px 0;font-size:18px}.element-help{margin:0;line-height:1.7}.element-help kbd{background:var(--chem-bg);border:1px solid var(--chem-border);border-radius:4px;padding:1px 4px;font:inherit;font-size:13px}.editor-popover:focus{outline:2px solid var(--chem-accent);outline-offset:2px}.chemistry-tools .editor-menu-trigger{font-size:16px;padding:10px 12px}.tools-popover{gap:9px;padding:16px}.tools-popover details{padding:4px 0}.export-actions{grid-template-columns:1fr 1fr}.element-popover .element-grid{grid-template-columns:repeat(6,1fr);max-height:180px;overflow-y:auto}.element-popover .element-grid button{padding:6px 0}.element-popover .element-help{font-size:13px}.export-actions button{font-size:14px;min-height:38px}.curved-arrow-shortcuts{display:grid;position:relative;grid-template-columns:repeat(4,minmax(0,1fr));gap:4px;align-items:center}.curved-arrow-shortcuts>button,.curved-arrow-options>button{display:flex;align-items:center;justify-content:center;border:1px solid;border-radius:6px;padding:0;height:40px;cursor:pointer;min-width:0}.curved-arrow-shortcuts svg{width:100%;height:34px}.curved-arrow-options{display:grid;grid-template-columns:repeat(3,1fr);gap:8px}.curved-arrow-options>button{height:48px}.curved-arrow-options svg{width:42px;height:42px}.arrow-picker-label{margin:2px 0;font-size:14px;font-weight:600}#root{width:100%;min-height:100vh;margin:0;padding:0}.editor-tour{position:fixed;top:0;right:0;bottom:0;left:0;z-index:1200;pointer-events:none;font:14px/1.5 Inter,Segoe UI,Arial,sans-serif;color:#443353}.tour-highlight{position:fixed;border:2px solid #e8b928;border-radius:10px;background:#ffe66a2b;box-shadow:0 0 0 3px #fff4b44d;box-sizing:border-box;pointer-events:none}.tour-dialog{position:fixed;width:320px;max-width:calc(100vw - 24px);max-height:calc(100dvh - 24px);box-sizing:border-box;padding:17px 19px;background:#fffdf8;border:1px solid #ddccec;border-radius:14px;box-shadow:0 10px 35px #40235c26;pointer-events:auto}.tour-dialog h2{font-size:18px;margin:12px 0 7px;font-weight:600;line-height:1.3;color:#563574}.tour-dialog p{margin:0 0 17px;color:#645470;font-size:14px;line-height:1.6}.tour-top,.tour-actions{display:flex;align-items:center;justify-content:space-between;gap:12px}.tour-top span{font-size:11px;color:#8b789a;letter-spacing:.02em}.tour-dialog button{font:inherit;font-size:13px;border:1px solid #ddd0e9;border-radius:7px;padding:7px 13px;background:#fff;color:#694885;cursor:pointer}.tour-top button{border:0;background:transparent;padding:2px 0}.tour-dialog button:disabled{opacity:.4;cursor:default}.tour-dialog button:focus-visible{outline:2px solid #7650c5;outline-offset:3px}.tour-dialog .tour-next{background:#7650c5;color:#fff;border-color:#7650c5;min-width:68px}.tour-pointer{position:absolute;width:14px;height:14px;background:#fffdf8;transform:rotate(45deg);border:solid #ddccec;pointer-events:none}.tour-pointer.right{left:-8px;top:calc(var(--pointer-offset) - 7px);border-width:0 0 1px 1px}.tour-pointer.left{right:-8px;top:calc(var(--pointer-offset) - 7px);border-width:1px 1px 0 0}.tour-pointer.top{bottom:-8px;left:calc(var(--pointer-offset) - 7px);border-width:0 1px 1px 0}.tour-pointer.bottom{top:-8px;left:calc(var(--pointer-offset) - 7px);border-width:1px 0 0 1px}.compact-tool-palette{display:grid;gap:5px;flex-shrink:0}.palette-heading{font-weight:500;font-size:11px;line-height:1.3;color:#82738f;margin-top:5px;letter-spacing:.03em}.palette-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:5px}.palette-grid.two{grid-template-columns:repeat(2,minmax(0,1fr))}.palette-more{display:grid;grid-template-columns:repeat(2,1fr);gap:12px}.palette-more>div{display:grid;gap:4px;text-align:center;font-size:12px}.common-atoms{display:grid;grid-template-columns:repeat(4,1fr);gap:4px;margin:7px 0}.common-atoms button{font-size:16px!important;height:30px;padding:2px!important}.drawing-sidebar{overflow:visible!important;gap:7px!important;padding-top:62px!important}.drawing-sidebar .chemistry-tools{min-height:0}.drawing-sidebar .toolbar-button{box-shadow:none!important}.drawing-sidebar .toolbar-button:hover{transform:none}.drawing-sidebar .editor-menu-trigger{font-size:12px;min-height:28px;padding:4px 6px}.annotation-editor{position:fixed;z-index:110;width:280px;padding:12px;display:grid;gap:10px;background:#fff;color:#41374e;border:1px solid #d9c9ed;border-radius:12px;box-shadow:0 8px 35px #37204a24;font:13px Arial}.annotation-heading,.annotation-row{display:flex;gap:8px;align-items:center;justify-content:space-between}.annotation-editor label{display:grid;gap:4px;min-width:0}.annotation-editor input[type=number]{width:100%;box-sizing:border-box}.annotation-editor input,.annotation-editor select,.annotation-editor textarea{font:14px Arial;border:1px solid #d9c9ed;border-radius:5px;padding:6px;min-width:0}.annotation-editor textarea{resize:vertical;width:100%;box-sizing:border-box}.annotation-editor button{border:1px solid #ded2ed;border-radius:6px;background:#f8f4fc;color:#604276;padding:6px 9px;cursor:pointer}.annotation-editor button.primary{background:#7650c5;color:#fff}.annotation-editor small{color:#897995;font-size:11px}.annotation-symbols{display:flex;flex-wrap:wrap;gap:4px}.annotation-symbols button{padding:4px 6px}.fragment-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:6px}.fragment-grid button{text-align:left!important;font-size:13px!important;padding:9px!important}.fragment-grid small{display:block;color:#8b789c;margin-top:4px}.drawing-sidebar [role=status]{max-height:65px;overflow:auto}.drawing-sidebar .palette-heading{font-size:11px}.drawing-sidebar .toolbar-button{font-weight:500!important}@media (max-height:720px){.drawing-sidebar{gap:3px!important;padding-bottom:6px!important}.compact-tool-palette{gap:3px}.palette-grid .toolbar-button{height:28px!important}.common-atoms{margin:3px 0;gap:3px}.common-atoms button{height:25px}.drawing-sidebar .editor-menu-trigger{min-height:24px}.palette-heading{margin-top:2px}.drawing-sidebar>div[style*="flex: 1"]{min-height:0!important}}@media (max-height:560px){.drawing-sidebar{padding-top:54px!important}.palette-heading{display:none}.palette-grid .toolbar-button{height:24px!important}.common-atoms button{height:23px}.drawing-sidebar .toolbar-button svg{max-height:19px}.drawing-sidebar .editor-menu-trigger{min-height:22px;padding:2px 5px}}.drawing-sidebar.embedded-drawing-toolbar{padding-top:12px!important}.style-presets{display:flex;gap:5px;margin-bottom:10px}.drawing-sidebar .curved-arrow-shortcuts>button{height:32px}.drawing-sidebar .curved-arrow-shortcuts svg{height:28px}@media (max-height:720px){.drawing-sidebar .curved-arrow-shortcuts>button{height:28px}.drawing-sidebar .curved-arrow-shortcuts svg{height:24px}}.periodic-popover{box-sizing:border-box}.periodic-popover .periodic-table{display:grid;grid-template-columns:repeat(18,minmax(32px,1fr));grid-template-rows:repeat(9,37px);gap:3px;max-height:none;min-width:630px;overflow:visible}.periodic-scroll{overflow:auto}.periodic-table button{font:500 15px Arial!important;padding:1px!important;line-height:1.1!important;background:var(--element-tint)!important;border-radius:4px!important}.periodic-table button small{display:block;font-size:9px;line-height:12px}.periodic-table button.element-dimmed{opacity:.25}.periodic-table button[aria-pressed=true]{outline:2px solid #7650c5}.ion-presets{display:flex;gap:7px}.ion-presets button{min-width:50px}.view-toggle{display:flex;align-items:center;justify-content:space-between;gap:30px}.switch-track{width:36px;height:21px;border-radius:20px;background:#c7bfd2;display:inline-flex;align-items:center;padding:3px;box-sizing:border-box}.switch-track:after{content:"";height:15px;width:15px;background:#fff;border-radius:50%;box-shadow:0 1px 3px #0002;transition:transform .15s}.view-toggle[aria-checked=true] .switch-track{background:#7650c5}.view-toggle[aria-checked=true] .switch-track:after{transform:translate(15px)}.bracket-position-actions{position:fixed;right:20px;bottom:18px;z-index:15;display:flex;align-items:center;gap:14px;background:#fff;border:1px solid #ded0ed;padding:12px;border-radius:10px;box-shadow:0 4px 16px #52376b18;font-size:13px;color:#6c587d}.bracket-position-actions button{background:#7650c5;color:#fff;border:0;border-radius:7px;padding:10px 26px;font-weight:600;cursor:pointer}.primary-tools .toolbar-button{height:50px!important;gap:6px}.secondary-tools{grid-template-columns:repeat(3,minmax(0,1fr))}@media (max-height:720px){.primary-tools .toolbar-button{height:38px!important;gap:3px}}@media (max-height:560px){.primary-tools .toolbar-button{height:34px!important}.primary-tools .toolbar-button svg{max-height:24px!important}}.drawing-aux-actions button{padding:4px!important;font-size:10px!important;white-space:nowrap}@media (max-height:650px){.drawing-sidebar .palette-heading{margin-top:0;line-height:1;font-size:10px}}.toolbar-ions{display:grid;grid-template-columns:repeat(3,1fr);gap:4px;margin-top:5px}.toolbar-ions button{padding:4px!important;font-size:14px!important;min-height:27px}.toolbar-ions button[aria-pressed=true]{background:#7650c5!important;color:#fff!important}@media (min-height:760px){.palette-grid .toolbar-button{height:38px!important}.primary-tools .toolbar-button{height:56px!important}.common-atoms button{height:32px}}@media (max-height:650px){.toolbar-ions{margin-top:2px}.toolbar-ions button{min-height:22px;padding:1px!important}.drawing-sidebar{gap:2px!important}.common-atoms button{height:22px!important}}.drawing-history-actions{display:grid;grid-template-columns:1fr 1.15fr 1fr;gap:5px;flex-shrink:0;margin-bottom:4px}.drawing-history-actions .toolbar-button{display:flex;align-items:center;justify-content:center;gap:3px;min-width:0;height:36px;padding:4px 2px;border:1px solid var(--history-border);border-radius:7px;background:var(--history-bg);color:var(--history-text);font-size:11px;font-family:inherit;cursor:pointer;white-space:nowrap}.drawing-history-actions svg{width:18px;height:18px;flex-shrink:0;fill:none;stroke:currentColor;stroke-width:1.7;stroke-linecap:round;stroke-linejoin:round}.drawing-history-actions .toolbar-button:hover:not(:disabled){background:#e8def5}.drawing-history-actions .erase-all:hover{color:#a53250;background:#fbeaf0}.drawing-history-actions .toolbar-button:disabled{opacity:.45;cursor:default}.toolbar-tab-group{position:relative}.drawing-sidebar .toolbar-expansion-tab{position:absolute;right:-36px;top:50%;transform:translateY(-50%);width:20px;height:36px;min-height:0;padding:0;display:flex;align-items:center;justify-content:center;grid-column:auto;grid-row:auto;border:1px solid var(--toolbar-button-border);border-left:0;border-radius:0 7px 7px 0;z-index:5;cursor:pointer;box-shadow:none}.drawing-sidebar .toolbar-expansion-tab span{font-size:17px;line-height:1}.drawing-sidebar button:not([aria-pressed=true]):not([aria-expanded=true]){background:var(--toolbar-button-bg)!important;color:var(--toolbar-button-text)}.drawing-sidebar button:hover:not(:disabled):not([aria-pressed=true]):not([aria-expanded=true]){background:var(--toolbar-button-hover)!important}.drawing-sidebar button[aria-pressed=true],.drawing-sidebar .toolbar-expansion-tab[aria-expanded=true]{background:var(--toolbar-button-active)!important;color:#fff}.drawing-sidebar .toolbar-expansion-tab:hover{transform:translateY(-50%)}.animation-drawing-tools,.figure-chemistry-modal>aside{z-index:2;overflow:visible}.structure-fragments{margin-top:12px}.structure-fragments .fragment-grid{margin-top:10px}.structure-fragments input,.structure-fragments select{margin:6px 0}.expansion-opening{animation:toolbar-menu-in .15s ease-out}.expansion-closing{animation:toolbar-menu-out .15s ease-in forwards}@keyframes toolbar-menu-in{0%{opacity:0;transform:translate(-8px)}to{opacity:1;transform:translate(0)}}@keyframes toolbar-menu-out{0%{opacity:1;transform:translate(0)}to{opacity:0;transform:translate(-8px)}}@media (prefers-reduced-motion:reduce){.expansion-opening,.expansion-closing{animation:none}}.reaction-label-field{display:flex;gap:6px;align-items:center}.reaction-label-field input{min-width:0;flex:1}.reaction-label-field button{flex:none;width:38px;height:36px}.reaction-label-field button[aria-pressed=true]{background:#7650c5;color:#fff}.drawing-sidebar .toolbar-expansion-tab{right:-34px;width:18px;height:64px!important;border:0;border-radius:0 6px 6px 0;box-shadow:inset 3px 0 4px -2px #70518f38,2px 1px 5px #70518f1a;--toolbar-button-bg:#f4effb;--toolbar-button-active:#ece2f7}.drawing-sidebar .toolbar-expansion-tab[aria-expanded=true]{color:var(--toolbar-tab-accent)!important}.drawing-sidebar .toolbar-expansion-tab:focus-visible span{outline:2px solid currentColor;outline-offset:1px;border-radius:3px}.canvas-selection-actions button{display:inline-flex;align-items:center;gap:5px;min-height:34px;padding:6px 10px;border:1px solid #d9cdeb;border-radius:7px;background:#fff;color:#65449c;box-shadow:0 2px 6px #50306b12;cursor:pointer}.canvas-selection-actions button:disabled{opacity:.45;cursor:default}.canvas-selection-actions button[aria-pressed=true]{background:#eee4fb;border-color:#9166ca}