:root{--bg:#f5f5f7;--panel:#fff;--panel-2:#f2f2f5;--canvas:#fff;--dot:#00000012;--border:#00000017;--text:#1d1d1f;--muted:#6e6e73;--accent:#0a84ff;--accent-soft:#0a84ff1f;--danger:#d70015;--hover:#0000000d;--shadow:0 8px 30px #0000001f;--radius:10px;--lightningcss-light:initial;--lightningcss-dark: ;color-scheme:light;font-family:-apple-system,BlinkMacSystemFont,SF Pro Text,Segoe UI,Inter,Roboto,sans-serif;font-size:13px}@media (prefers-color-scheme:dark){:root:not([data-theme=light]){--bg:#161618;--panel:#1f1f22;--panel-2:#2a2a2e;--canvas:#1c1c1e;--dot:#ffffff12;--border:#ffffff17;--text:#f2f2f7;--muted:#98989f;--accent:#0a84ff;--accent-soft:#0a84ff38;--danger:#ff6961;--hover:#ffffff12;--shadow:0 8px 30px #00000080;--lightningcss-light: ;--lightningcss-dark:initial;color-scheme:dark}}:root[data-theme=dark]{--bg:#161618;--panel:#1f1f22;--panel-2:#2a2a2e;--canvas:#1c1c1e;--dot:#ffffff12;--border:#ffffff17;--text:#f2f2f7;--muted:#98989f;--accent:#0a84ff;--accent-soft:#0a84ff38;--danger:#ff6961;--hover:#ffffff12;--shadow:0 8px 30px #00000080;--lightningcss-light: ;--lightningcss-dark:initial;color-scheme:dark}*{box-sizing:border-box}html,body{background:var(--bg);height:100%;color:var(--text);margin:0;overflow:hidden}button,input,textarea{font:inherit;color:inherit}#app{grid-template:"top top top top"48px"tools lib canvas insp"1fr/52px 268px 1fr 288px;height:100%;display:grid}#app.lib-hidden{grid-template-columns:52px 0 1fr 288px}#app.lib-hidden .library{display:none}.topbar{background:var(--panel);border-bottom:1px solid var(--border);-webkit-user-select:none;user-select:none;grid-area:top;align-items:center;gap:6px;padding:0 12px;display:flex}.desktop-mac 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30px}.lib-search input:focus{border-color:var(--accent);box-shadow:0 0 0 3px var(--accent-soft)}.chips{border-bottom:1px solid var(--border);flex-wrap:wrap;gap:4px;padding:2px 10px 8px;display:flex}.chip{border:1px solid var(--border);cursor:pointer;color:var(--muted);background:0 0;border-radius:999px;padding:3px 9px;font-size:11.5px}.chip:hover{background:var(--hover)}.chip.active{background:var(--accent);border-color:var(--accent);color:#fff}.lib-grid{flex:1;grid-template-columns:1fr 1fr;align-content:start;gap:8px;padding:8px 10px 16px;display:grid;overflow-y:auto}.lib-cat-title{text-transform:uppercase;letter-spacing:.06em;color:var(--muted);grid-column:1/-1;margin:8px 2px 0;font-size:11px;font-weight:650}.card{border:1px solid var(--border);border-radius:var(--radius);background:var(--canvas);cursor:pointer;text-align:center;flex-direction:column;align-items:center;gap:4px;min-width:0;padding:6px 6px 7px;transition:border-color .12s,box-shadow .12s,transform .12s;display:flex}.card:hover{border-color:var(--accent);box-shadow:0 2px 10px var(--accent-soft)}.card.active{border-color:var(--accent);box-shadow:0 0 0 2px var(--accent)}.card .thumb{justify-content:center;align-items:center;width:100%;height:74px;display:flex}.card .thumb svg{max-width:100%;max-height:100%}.card .name{text-overflow:ellipsis;-webkit-line-clamp:2;-webkit-box-orient:vertical;font-size:11.5px;line-height:1.25;display:-webkit-box;overflow:hidden}.lib-empty{color:var(--muted);text-align:center;grid-column:1/-1;padding:30px 10px}.canvas-wrap{background-color:var(--canvas);background-image:radial-gradient(circle, var(--dot) 1.1px, transparent 1.2px);grid-area:canvas;position:relative;overflow:hidden}#canvas{cursor:crosshair;touch-action:none;width:100%;height:100%;display:block;position:absolute;inset:0}#canvas[data-tool=select]{cursor:default}#canvas[data-tool=text]{cursor:text}#canvas text{-webkit-user-select:none;user-select:none}.infobar{border:1px solid var(--border);border-left:3px solid var(--accent);background:var(--panel);pointer-events:none;border-radius:10px;align-items:baseline;gap:8px;min-height:36px;padding:8px 12px;font-size:12.5px;line-height:1.45;display:flex;position:absolute;bottom:12px;left:12px;right:12px;box-shadow:0 2px 10px #0000000f}.infobar b{flex:none;font-weight:650}.infobar span{color:var(--muted);min-width:0}.infobar.warn{border-left-color:var(--danger)}.infobar.warn b{color:var(--danger)}.empty-hint{text-align:center;color:var(--muted);pointer-events:none;max-width:440px;position:absolute;top:50%;left:50%;transform:translate(-50%,-50%)}.empty-hint h2{color:var(--text);letter-spacing:-.01em;margin:0 0 6px;font-size:20px;font-weight:650}.empty-hint p{margin:4px 0;line-height:1.5}.empty-hint .keys{margin-top:12px;font-size:12px}kbd{border:1px solid var(--border);background:var(--panel);border-bottom-width:2px;border-radius:4px;padding:0 4px;font-family:inherit;font-size:11px}.canvas-input{z-index:5;border:1.5px 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var(--border);background:var(--panel-2);cursor:pointer;border-radius:7px;padding:5px 10px;font-size:12px}.mini:hover{border-color:var(--accent)}.mini.wide{width:100%;margin-top:8px}.mini.primary{background:var(--accent);border-color:var(--accent);color:#fff}.collapse{all:unset;cursor:pointer;align-items:center;gap:6px;width:100%;display:flex}.collapse:hover{color:var(--text)}.collapse:focus-visible{outline:2px solid var(--accent);outline-offset:2px;border-radius:4px}.collapse .chev{border-top:4px solid #0000;border-bottom:4px solid #0000;border-left:5px solid;width:0;height:0;transition:transform .15s}.collapse[aria-expanded=true] .chev{transform:rotate(90deg)}#solubility-section h3{margin-bottom:0}#solubility{margin-top:8px}.btn-row{gap:6px;display:flex}.btn-row .mini{flex:1}.method{margin-top:6px;font-size:11.5px;line-height:1.4}.groups{color:var(--muted);margin-top:6px;font-size:11.5px}.groups summary{cursor:pointer}.name-row #name-out{word-break:break-word;margin-top:6px}textarea{resize:vertical;border:1px solid var(--border);background:var(--panel-2);border-radius:8px;outline:none;width:100%;padding:7px 9px;font-family:ui-monospace,SF Mono,Menlo,monospace;font-size:11.5px}textarea:focus{border-color:var(--accent);box-shadow:0 0 0 3px var(--accent-soft)}.field{align-items:center;gap:8px;margin-top:8px;font-size:12.5px;display:flex}.field input{border:1px solid var(--border);background:var(--panel-2);border-radius:6px;outline:none;width:70px;height:26px;padding:0 6px}.field input:focus{border-color:var(--accent)}.credit{color:var(--muted);text-align:center;margin-top:auto;padding-top:14px;font-size:11px}.credit a{color:inherit;text-underline-offset:2px;text-decoration:underline}.credit a:hover{color:var(--accent,#0a84ff)}.popover,.menu{z-index:50;background:var(--panel);border:1px solid var(--border);box-shadow:var(--shadow);border-radius:12px;padding:10px;position:fixed}.menu{min-width:210px;padding:5px}.menu button{cursor:pointer;text-align:left;background:0 0;border:none;border-radius:7px;justify-content:space-between;gap:16px;width:100%;padding:7px 10px;display:flex}.menu button:hover{background:var(--accent);color:#fff}.menu button span{opacity:.6;font-size:11.5px}.ptable{grid-template-columns:repeat(18,28px);gap:2px;display:grid}.ptable button{background:var(--panel-2);cursor:pointer;border:none;border-radius:5px;height:28px;padding:0;font-family:Helvetica Neue,Helvetica,Arial,sans-serif;font-size:11.5px}.ptable button:hover{background:var(--accent);color:#fff}.ptable .gap{grid-column:1/-1;height:8px}@media (max-width:1100px){#app{grid-template-columns:52px 220px 1fr 250px}}@media (max-width:760px){#app,#app.lib-hidden{grid-template-columns:48px minmax(0,1fr);grid-template-areas:"top top""tools 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48px);color:var(--text);box-shadow:var(--shadow);border-radius:14px;padding:0;overflow:hidden}dialog.analyzer[open]{flex-direction:column;display:flex}dialog.analyzer::backdrop{background:#00000059}.an-head{border-bottom:1px solid var(--border);justify-content:space-between;align-items:center;padding:12px 16px;display:flex}.an-head h2{margin:0;font-size:15px;font-weight:650}.an-body{padding:4px 16px 16px;overflow-y:auto}.an-body section{border-bottom:1px solid var(--border);padding:12px 0}.an-body section:last-child{border-bottom:0}.an-body h3{text-transform:uppercase;letter-spacing:.06em;margin:0 0 8px;font-size:11px;font-weight:650}.an-body p{margin:6px 0}.an-targets{flex-direction:column;gap:4px;font-size:12.5px;display:flex}.an-inputs{flex-wrap:wrap;align-items:center;gap:8px;margin-top:8px;font-size:12.5px;display:flex}.an-inputs input{border:1px solid var(--border);background:var(--panel-2);border-radius:6px;width:64px;height:26px;padding:0 6px}.an-inputs #an-name{width:140px}.an-note{font-size:11.5px;line-height:1.4}.an-table-wrap{border:1px solid var(--border);border-radius:8px;max-height:320px;overflow:auto}.an-table{border-collapse:collapse;font-variant-numeric:tabular-nums;width:100%;font-size:12px}.an-table th{background:var(--panel-2);text-align:right;padding:5px 8px;font-weight:600;position:sticky;top:0}.an-table td{text-align:right;border-top:1px solid var(--border);padding:3px 8px}.an-table th:first-child,.an-table td:first-child{text-align:left}.an-table td.in{color:#1e9e3a;font-weight:600}.an-table td.out{color:var(--muted)}.an-x{all:unset;cursor:pointer;color:var(--muted);padding:0 4px}.an-x:hover{color:var(--danger)}.an-add{margin-top:8px;font-size:12.5px}.an-add summary{cursor:pointer;color:var(--accent)}.an-result{margin-top:10px}.an-warn{color:var(--danger);margin:6px 0;padding-left:18px}p.an-warn{padding-left:0}#nmr-section h3{margin-bottom:0}#nmr{margin-top:8px}.nmr-controls{flex-wrap:wrap;align-items:center;gap:6px;margin-bottom:6px;display:flex}.nmr-controls select{border:1px solid var(--border);background:var(--panel-2);border-radius:6px;height:24px;padding:0 4px;font-size:12px}.seg{background:var(--panel-2);border-radius:7px;gap:2px;padding:2px;display:inline-flex}.seg button{all:unset;cursor:pointer;color:var(--muted);border-radius:5px;padding:2px 10px;font-size:12px}.seg button.on{background:var(--panel);color:var(--text);box-shadow:0 1px 2px #00000026}.seg button:focus-visible{outline:2px solid var(--accent)}.nmr-plot svg,.nmr-plot-wrap svg{width:100%;height:auto;display:block;overflow:visible}.nmr-pk{cursor:default}.nmr-table{border-collapse:collapse;font-variant-numeric:tabular-nums;width:100%;margin-top:6px;font-size:12px}.nmr-table th{text-align:left;color:var(--muted);padding:2px 3px;font-weight:500}.nmr-table td{border-top:1px solid var(--border);vertical-align:top;padding:3px}.nmr-table tr.hl td,.nmr-table tbody tr:hover td{background:var(--accent-soft)}.pk-dot{color:#fff;text-align:center;border-radius:8px;min-width:15px;height:15px;padding:0 3px;font-size:9.5px;font-weight:600;line-height:15px;display:inline-block}.nmr-lit{margin-top:6px;line-height:1.4}.lit-dot{vertical-align:middle;border-top:2px dashed #30b158;width:10px;height:0;margin-right:5px;display:inline-block}dialog.nmr-dialog{width:min(1180px,100vw - 32px);height:calc(100vh - 48px)}.nmr-sub{margin-left:6px;font-size:13px;font-weight:400}.nmr-head-actions{gap:6px;display:flex}.nmr-body{flex:1;grid-template-columns:minmax(0,1fr) 300px;gap:18px;min-height:0;padding:12px 16px 16px;display:grid;overflow:hidden}.nmr-main{min-width:0;padding-right:4px;overflow-y:auto}.nmr-toolbar{flex-wrap:wrap;align-items:center;gap:8px;margin-bottom:8px;display:flex}.nmr-toolbar .nmr-controls{margin:0}.chip{all:unset;cursor:pointer;background:var(--panel-2);color:var(--muted);border-radius:999px;padding:3px 10px;font-size:12px}.chip.on{background:var(--accent-soft);color:var(--accent)}.chip:focus-visible{outline:2px solid var(--accent)}.nmr-plot-wrap{-webkit-user-select:none;user-select:none;margin:6px 0 12px;position:relative}.nmr-plot-wrap svg{cursor:crosshair}.nmr-plot-title{margin-bottom:2px;font-size:12px;font-weight:600}.nmr-zoombox{background:var(--accent-soft);border:1px solid var(--accent);pointer-events:none;position:absolute}.nmr-tables{grid-template-columns:minmax(180px,1fr) minmax(0,1.4fr) minmax(0,1fr);align-items:start;gap:16px;display:grid}.nmr-structure svg{width:100%;height:auto;max-height:260px}.nmr-side{border-left:1px solid var(--border);flex-direction:column;min-height:0;padding-left:16px;display:flex}.nmr-side h3{text-transform:uppercase;letter-spacing:.06em;margin:0 0 6px;font-size:11px;font-weight:650}.nmr-search{border:1px solid var(--border);background:var(--panel-2);border-radius:8px;height:30px;padding:0 10px}.nmr-cats{flex-wrap:wrap;gap:4px;margin:8px 0;display:flex}.nmr-refs{flex-direction:column;flex:1;gap:5px;padding-right:2px;display:flex;overflow-y:auto}.ref-item{all:unset;cursor:pointer;background:var(--panel-2);border:1px solid #0000;border-radius:8px;flex-direction:column;gap:1px;padding:7px 9px;font-size:12px;display:flex}.ref-item:hover{border-color:var(--border)}.ref-item.on{background:#bf5af21a;border-color:#bf5af2}.ref-item:focus-visible{outline:2px solid var(--accent)}.ref-name{font-weight:600}.ref-vals{font-variant-numeric:tabular-nums}.ref-vals b{color:var(--muted);font-weight:600}.ref-note{font-size:11.5px}.ref-badge{color:#1e9e3a;background:#30b15824;border-radius:999px;margin-left:4px;padding:1px 6px;font-size:10.5px;font-weight:500}@media (max-width:900px){.nmr-body{grid-template-columns:1fr;overflow-y:auto}.nmr-side{border-left:0;padding-left:0}.nmr-tables{grid-template-columns:1fr}}