:root{
  --bg:#f6f6f3;--paper:#fbfbf8;--ink:#203139;--muted:#68747a;--blue:#355c7d;--gold:#b68c37;--line:#d6dcda;--soft:#eef1ef;
  --element:#2E58A4;--element-strong:#244A8D;--element-text:#FFFFFF;--half:#FFC000;--half-text:#002060;--other:#E3DED4;--other-text:#002060;--unknown:#F3F4F2;--pt-outline:#002060;--pt-accent:#0068B7;--pt-bg:#F8FBFC;--font:"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif;
}
body[data-palette="wave"]{--element:#2E58A4;--element-strong:#244A8D;--element-text:#FFFFFF;--half:#FFC000;--half-text:#002060;--other:#E3DED4;--other-text:#002060;--unknown:#F3F4F2;--pt-outline:#002060;--pt-accent:#0068B7;--pt-bg:#F8FBFC}
body[data-palette="jacs"]{--element:#DCE8F0;--element-strong:#C8DAE6;--element-text:#203139;--half:#E9D8AF;--half-text:#203139;--other:#E5E7E8;--other-text:#203139;--unknown:#F2F2EF;--pt-outline:#8EA6B6;--pt-accent:#1F5A85;--pt-bg:#FAFAF8}
body[data-palette="muted"]{--element:#DCE5EC;--element-strong:#CBD8E2;--element-text:#203139;--half:#E8DDD2;--half-text:#203139;--other:#DFE6E1;--other-text:#203139;--unknown:#F1F2EF;--pt-outline:#96A7A1;--pt-accent:#56888A;--pt-bg:#F8F8F6}
body[data-palette="pastel"]{--element:#7FA9CC;--element-strong:#6E99BD;--element-text:#203139;--half:#E3BE88;--half-text:#203139;--other:#A9AFB5;--other-text:#203139;--unknown:#F2F2F1;--pt-outline:#667A8C;--pt-accent:#7D698C;--pt-bg:#FAFAF8}
body[data-palette="classic"]{--element:#D9E7F4;--element-strong:#C6D9EA;--element-text:#203139;--half:#F3DADA;--half-text:#203139;--other:#DFEDE1;--other-text:#203139;--unknown:#F2F2EF;--pt-outline:#7C9CBA;--pt-accent:#2F6FB0;--pt-bg:#FAFAF8}
body[data-palette="set2"]{--element:#DCEFE9;--element-strong:#CBE4DB;--element-text:#203139;--half:#F5DED5;--half-text:#203139;--other:#E3E6F1;--other-text:#203139;--unknown:#F1F2EF;--pt-outline:#84A99D;--pt-accent:#4B9F88;--pt-bg:#FAFAF8}
body[data-palette="cividis"]{--element:#DDE4ED;--element-strong:#CDD7E3;--element-text:#203139;--half:#EFE4B8;--half-text:#203139;--other:#E5E5DF;--other-text:#203139;--unknown:#F2F2EF;--pt-outline:#7C8798;--pt-accent:#35456C;--pt-bg:#FAFAF8}
body[data-palette="grayscale"]{--element:#E0E4E5;--element-strong:#D3D8D9;--element-text:#203139;--half:#D7D9DA;--half-text:#203139;--other:#ECEDEB;--other-text:#203139;--unknown:#F4F4F2;--pt-outline:#8C9294;--pt-accent:#4A4A4A;--pt-bg:#FAFAF8}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--bg);color:var(--ink);font-family:var(--font);font-size:15px;line-height:1.65}a{color:inherit;text-decoration:none}button,input,select{font:inherit;color:inherit}button{border-radius:0}img{max-width:100%}.container{width:min(1440px,calc(100% - 80px));margin-inline:auto}.atlas-wide{width:min(1680px,calc(100% - 80px));margin-inline:auto}.skip-link{position:fixed;left:20px;top:-80px;background:var(--ink);color:#fff;padding:7px 16px;z-index:80}.skip-link:focus{top:10px}.header-inner{min-height:90px;border-bottom:1px solid var(--line);display:flex;align-items:center;justify-content:flex-start;gap:28px}.section-brand{display:flex;align-items:center;gap:12px;font-family:Georgia,serif;font-weight:400;flex-shrink:0}.section-brand-icon-link{padding:0;display:block}.section-brand-icon{display:block;width:48px;height:48px;object-fit:contain}.section-brand-text{width:170px;display:flex;flex-direction:column}.section-brand-title{color:#203139;font-size:25px;letter-spacing:-.6px;line-height:30px;white-space:nowrap;text-decoration:none}.section-brand-gold,.section-brand-dot{color:#b68c37}.section-brand-subtitle{color:#203139;font:400 16px/21px Georgia,serif;margin-top:3px;text-align:center;text-decoration:none}.section-brand-title:is(:hover,:active,:focus-visible),.section-brand-subtitle:is(:hover,:active,:focus-visible){color:#355c7d;text-decoration:underline;text-decoration-thickness:1px;text-underline-offset:.16em;text-decoration-skip-ink:auto}.section-brand-title:is(:hover,:active,:focus-visible) .section-brand-gold,.section-brand-title:is(:hover,:active,:focus-visible) .section-brand-dot{color:#b68c37}.site-nav{display:flex;gap:30px;font-size:13px}.site-nav a[aria-current]{color:var(--blue);box-shadow:0 1px var(--blue)}.site-nav a:hover{color:var(--blue)}.intro{padding:52px 0 30px}.eyebrow,.control-label{font-size:10px;letter-spacing:1.8px;color:var(--muted);text-transform:uppercase}.intro-grid{display:grid;grid-template-columns:1fr auto;gap:50px;align-items:end}.intro h1{font:400 clamp(44px,6vw,76px)/1.05 Georgia,serif;letter-spacing:-2.6px;margin:12px 0 16px}.lede{font-size:17px;max-width:760px;margin:0}.formula{border-left:2px solid var(--gold);padding:5px 0 5px 18px;display:flex;flex-direction:column;align-items:flex-end}.formula span{font:22px Georgia,serif}.formula small{font-size:10px;color:var(--muted);letter-spacing:.7px}
.control-band{display:grid;grid-template-columns:1fr 1fr .9fr 2.1fr;gap:0;border-top:2px solid var(--ink);border-bottom:1px solid var(--line);background:var(--paper)}.field-control,.presets{padding:20px 24px;border-right:1px solid var(--line);min-width:0}.field-control label,.search-wrap label{display:block;font-size:10px;letter-spacing:1.1px;color:var(--muted);margin-bottom:8px}.input-line{display:flex;align-items:baseline;gap:8px}.input-line input{width:100%;border:0;border-bottom:1px solid var(--line);background:transparent;padding:1px 0;font:32px/1.2 Georgia,serif}.input-line span{font-size:12px;color:var(--muted)}.nominal strong{display:block;font:26px Georgia,serif;margin-top:7px}.nominal small{color:var(--muted)}.presets{border-right:0}.presets>div{display:flex;gap:4px;flex-wrap:wrap;margin-top:7px}.presets button,.segmented button{border:0;background:transparent;padding:6px 9px;cursor:pointer}.presets button:hover,.segmented button:hover{background:var(--soft)}.presets button.active,.segmented button.active{background:var(--ink);color:#fff}.field-slider{grid-column:1/-1;padding:0 24px 16px}.field-slider input{width:100%;accent-color:var(--gold)}.slider-scale{display:flex;justify-content:space-between;color:var(--muted);font-size:9px;letter-spacing:.5px;margin:2px 0 -3px}
input:focus-visible,select:focus-visible,button:focus-visible,a:focus-visible{outline:2px solid var(--blue);outline-offset:3px}.periodic-tools{display:grid;grid-template-columns:minmax(280px,1fr) auto auto;gap:28px;align-items:end;padding-top:30px;padding-bottom:16px}.search-wrap input,.impurity-toolbar input,.comparison-controls input,.comparison-controls select{width:100%;border:1px solid var(--line);background:transparent;padding:9px 10px}.filter-wrap>span{display:block;font-size:9px;letter-spacing:1.3px;color:var(--muted);margin-bottom:8px}.segmented{display:flex;border:1px solid var(--line);width:max-content}.segmented button+button{border-left:1px solid var(--line)}.legend{display:flex;gap:15px;font-size:10px;color:var(--muted);padding-bottom:7px}.legend i{display:inline-block;width:8px;height:8px;margin-right:5px}.legend i.half{background:var(--half)}.legend i.other{background:var(--other)}
.periodic-section{position:relative;border:0;padding:15px 0 14px;background:var(--bg)}.periodic-section::before,.periodic-section::after{content:"";position:absolute;left:50%;transform:translateX(-50%);width:min(1680px,calc(100% - 80px));height:1px;background:var(--line)}.periodic-section::before{top:0}.periodic-section::after{bottom:0}.periodic-meta{display:flex;justify-content:space-between;gap:20px;align-items:center;padding-bottom:10px}.data-key{display:flex;gap:15px;flex-wrap:wrap;font-size:9.5px;color:var(--muted);letter-spacing:.35px;align-items:center}.data-key .key-title{font-weight:700;color:var(--ink);letter-spacing:1px}.data-key .key-hover{padding-left:12px;border-left:1px solid var(--line)}.data-key b{font-weight:600;color:var(--ink)}.periodic-meta-right{display:flex;align-items:center;gap:18px}.palette-picker{position:relative}.palette-picker-button{display:grid;grid-template-columns:auto auto auto auto;align-items:center;gap:8px;border:1px solid var(--line);background:var(--paper);padding:5px 8px;min-width:180px;cursor:pointer}.palette-picker-button:hover{border-color:#aeb8b5;background:var(--soft)}.palette-picker-label{font-size:8px;letter-spacing:1px;color:var(--muted)}.palette-picker-name{font-size:10px;color:var(--ink);text-align:left}.palette-mini{display:flex;gap:2px}.palette-mini i{display:block;width:14px;height:8px;border:1px solid rgba(32,49,57,.12)}.palette-caret{font-size:10px;color:var(--muted)}.palette-menu{position:absolute;right:0;top:calc(100% + 6px);z-index:35;width:min(420px,calc(100vw - 32px));max-height:340px;overflow:auto;border:1px solid var(--line);background:var(--paper);box-shadow:0 10px 30px rgba(32,49,57,.12);padding:8px}.palette-menu[hidden]{display:none}.palette-group-title{font-size:8px;letter-spacing:1.2px;color:var(--muted);padding:6px 7px 4px}.palette-options{display:grid;grid-template-columns:1fr 1fr;gap:4px}.palette-option{display:grid;grid-template-columns:1fr auto;align-items:center;gap:10px;width:100%;border:1px solid transparent;background:transparent;text-align:left;padding:7px 8px;cursor:pointer}.palette-option:hover{background:var(--soft);border-color:var(--line)}.palette-option.active{background:#eef2f1;border-color:#aeb8b5}.palette-option-name{font-size:10px}.palette-option-swatches{display:flex;gap:2px}.palette-option-swatches i{display:block;width:18px;height:10px;border:1px solid rgba(32,49,57,.12)}.layout-name{font:10px Georgia,serif;color:var(--blue);white-space:nowrap}.periodic-frame{position:relative}.periodic-scroll{overflow-x:auto;padding:2px 0 7px;scrollbar-color:var(--gold) transparent}.periodic-full-grid{display:grid;grid-template-columns:repeat(18,minmax(0,1fr));gap:4px;width:100%;min-width:1420px}.periodic-section-stack{display:grid;gap:calc(var(--cell,112px) * .5)}.block-title{font:10px Georgia,serif;color:var(--muted);letter-spacing:1px;margin:0 0 5px}.periodic-grid{display:grid;gap:5px;width:max-content}.periodic-grid.sp{grid-template-columns:repeat(8,var(--cell));}.periodic-grid.d{grid-template-columns:repeat(10,var(--cell));}.periodic-grid.f{grid-template-columns:repeat(15,var(--cell));}.group-number{align-self:end;text-align:center;color:var(--muted);font:9px Georgia,serif;height:16px}.element-block{aspect-ratio:1/1;display:flex;min-width:0;border:1px solid var(--pt-outline);background:var(--paper);transition:opacity .12s,box-shadow .12s,transform .12s;overflow:hidden}.element-main{position:relative;flex:0 0 38.2%;background:var(--element);color:var(--element-text);display:flex;flex-direction:column;align-items:center;justify-content:center;border:0;border-right:1px solid var(--pt-outline);padding:3px;cursor:pointer;min-width:0}.element-main:hover{background:var(--element-strong)}.element-main .z{position:absolute;top:4px;left:5px;font-size:7px;color:color-mix(in srgb,var(--element-text) 78%,transparent)}.element-main .symbol{font:700 clamp(17px,1.25vw,22px)/1 Georgia,serif}.element-main .name{font-size:7px;text-align:center;line-height:1.05;margin-top:3px;max-width:100%;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.element-main .range{font-size:7px;margin-top:7px;color:color-mix(in srgb,var(--element-text) 86%,transparent);text-decoration:underline}.isotope-stack{flex:1 1 auto;display:flex;min-width:0;height:100%}.isotope-cell{flex:1 1 0;min-width:0;min-height:0;border:0;border-right:1px solid var(--pt-outline);padding:3px 2px;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:2px;background:var(--other);cursor:pointer;text-align:center;overflow:hidden}.isotope-cell:last-child{border-right:0}.isotope-cell.half{background:var(--half);color:var(--half-text)}.isotope-cell.other{background:var(--other);color:var(--other-text)}.isotope-cell.unknown{background:var(--unknown);color:#9aa5a2;cursor:default}.isotope-cell:hover:not(.unknown):not(.pinned){box-shadow:inset 0 0 0 1px var(--pt-accent);z-index:2}.isotope-cell.pinned{box-shadow:inset 0 0 0 2px var(--pt-accent);z-index:2}.isotope-cell.filtered-out{display:none}.isotope-cell .mass{font:700 9.2px/1 Georgia,serif;white-space:nowrap;letter-spacing:-.15px}.isotope-stack.count-1 .mass{font-size:10px}.isotope-stack.count-2 .mass{font-size:9px}.isotope-stack.count-3 .mass,.isotope-stack.count-4 .mass{font-size:7.8px;letter-spacing:-.35px}.isotope-stack.count-3 .isotope-cell,.isotope-stack.count-4 .isotope-cell{padding-left:1px;padding-right:1px}.isotope-cell .line{font-size:7.4px;line-height:1.05;white-space:nowrap;overflow:hidden;max-width:100%;color:inherit;opacity:.9}.isotope-cell .freq{font:700 8.6px Georgia,serif;color:var(--pt-accent)}.isotope-cell .recept{font-size:7.5px;color:inherit;opacity:.82}.element-block.no-match{opacity:.14}.element-block.query-match{box-shadow:0 0 0 2px var(--gold);z-index:3}.element-block.query-no-match{opacity:.10}.table-caption{display:flex;justify-content:flex-end;gap:24px;font-size:10px;color:var(--muted);padding-top:10px}
.isotope-inspector{position:fixed;z-index:60;width:min(540px,calc(100% - 28px));max-height:min(68vh,580px);overflow:auto;background:rgba(251,251,248,.98);border:1px solid var(--line);box-shadow:0 12px 36px rgba(32,49,57,.14);padding:18px 20px;pointer-events:auto}.isotope-inspector[hidden]{display:none}.inspector-close{display:none}.inspector-head{display:grid;grid-template-columns:auto 1fr;gap:14px;align-items:end;border-bottom:1px solid var(--ink);padding-bottom:10px;margin-bottom:8px}.inspector-symbol{font:44px/1 Georgia,serif;color:var(--pt-accent)}.inspector-head h3{font:400 23px Georgia,serif;margin:0}.inspector-head p{font-size:10px;color:var(--muted);margin:2px 0 0}.inspector-table{width:100%;border-collapse:collapse;font-size:11px}.inspector-table th,.inspector-table td{border-bottom:1px solid var(--line);padding:7px 6px;text-align:right}.inspector-table th:first-child,.inspector-table td:first-child{text-align:left}.inspector-table .nucleus{font:16px Georgia,serif;color:var(--gold)}.inspector-note{margin:10px 0 0;font-size:9.5px;line-height:1.4;color:var(--muted)}
.selected-section,.reference-section{padding:48px 0 58px;border-bottom:1px solid var(--line)}.section-heading{display:flex;justify-content:space-between;align-items:flex-end;gap:25px;margin-bottom:24px}.section-heading h2{font:400 30px Georgia,serif;margin:6px 0 0}.section-note{font-size:11px;color:var(--muted);margin:0;max-width:520px}.comparison-heading{align-items:flex-start}.comparison-controls{display:block;min-width:150px}.comparison-controls label{font-size:10px;color:var(--muted)}.comparison-controls input{display:block;margin-top:5px;width:150px!important;font:18px Georgia,serif;padding:8px 10px!important}.plain-button{border:1px solid var(--ink);background:var(--ink);color:#fff;padding:9px 14px;cursor:pointer}.text-button{border:0;background:transparent;color:var(--blue);cursor:pointer;padding:9px}.empty-state{font-size:13px;color:var(--muted);border-top:1px solid var(--line);padding:20px 0}.comparison-scroll{overflow-x:auto}.comparison-table{width:100%;min-width:900px;border-collapse:collapse;border-top:2px solid var(--ink);font-size:12px}.comparison-table th{font-size:9px;letter-spacing:.3px;color:var(--muted);font-weight:500}.comparison-table th,.comparison-table td{padding:11px 10px;border-bottom:1px solid var(--line);text-align:right;white-space:nowrap}.comparison-table th:first-child,.comparison-table td:first-child{text-align:left}.comparison-table .nuclide{font:20px Georgia,serif;color:var(--gold)}.remove-pin{border:0;background:transparent;font-size:18px;cursor:pointer;color:var(--muted)}
.solvent-browser{display:grid;grid-template-columns:minmax(330px,370px) 1fr;border-top:2px solid var(--ink);border-bottom:1px solid var(--line);min-height:440px}.solvent-list{border-right:1px solid var(--line);display:grid;grid-template-columns:1fr 1fr;align-content:start}.solvent-choice{border:0;border-bottom:1px solid var(--line);border-right:1px solid var(--line);background:transparent;text-align:left;padding:10px 12px;cursor:pointer;font-size:11px;min-height:44px}.solvent-choice:nth-child(2n){border-right:0}.solvent-choice:hover{background:var(--soft)}.solvent-choice.active{background:var(--ink);color:#fff}.solvent-viewer{padding:26px 32px;min-width:0}.compound-head{display:grid;grid-template-columns:190px 1fr auto;gap:26px;align-items:center}.structure-plain{height:138px;display:grid;place-items:center;overflow:hidden}.structure-plain img{width:184px;height:132px;object-fit:contain;background:transparent;transform:scale(1.35);mix-blend-mode:multiply;transform-origin:center}.compound-head h3{font:400 30px Georgia,serif;margin:4px 0 1px}.molecular-formula{font:16px Georgia,serif;margin:0;color:var(--blue)}.residual-species{font-size:11px;color:var(--muted);margin:8px 0 0}.stick-plot-wrap{margin-top:24px;border-top:1px solid var(--line);padding-top:12px}.stick-plot-label{display:grid;grid-template-columns:auto 1fr auto;gap:16px;align-items:center;font-size:9px;color:var(--muted);letter-spacing:1px}.stick-plot-label>span:nth-child(2){text-align:right}.zoom-hint{letter-spacing:0;color:#89928f}.stick-plot{position:relative;height:180px;margin-top:9px;border-bottom:1px solid var(--ink);background:repeating-linear-gradient(to right,transparent 0,transparent calc(10% - 1px),rgba(104,116,122,.10) calc(10% - 1px),rgba(104,116,122,.10) 10%)}.axis-tick{position:absolute;bottom:-23px;transform:translateX(-50%);font:9px Georgia,serif;color:var(--muted)}.stick{position:absolute;bottom:0;width:2px;background:var(--gold);min-height:25px;transform:translateX(-50%)}.stick::after{content:attr(data-label);position:absolute;bottom:calc(100% + 4px);left:50%;transform:translateX(-50%);font:9px Georgia,serif;white-space:nowrap;color:var(--ink)}.stick.hod{background:var(--blue);opacity:.55}.signal-list{display:flex;flex-wrap:wrap;gap:8px;margin-top:35px}.signal-pill{border-left:2px solid var(--gold);padding:4px 8px;background:var(--paper);font:11px Georgia,serif}.reference-note{font-size:10px;color:var(--muted);margin-top:12px}
.impurity-section{padding:48px 0 58px;border-bottom:1px solid var(--line)}.impurity-toolbar{display:grid;grid-template-columns:minmax(300px,560px) auto;gap:18px;align-items:center;margin-bottom:10px}.matrix-key{display:flex;gap:16px;align-items:center;flex-wrap:wrap;margin:0 0 12px;font-size:10px;color:var(--muted)}.matrix-key span{letter-spacing:1px;text-transform:uppercase}.matrix-key b{font-weight:500;color:var(--ink)}.impurity-scroll{overflow-x:auto;overflow-y:visible;border-top:2px solid var(--ink);border-bottom:1px solid var(--line)}.impurity-matrix{min-width:1565px}.impurity-grid-head,.impurity-row{display:grid;grid-template-columns:245px repeat(6,minmax(220px,1fr))}.impurity-grid-head{position:sticky;top:0;z-index:7;background:var(--bg);border-bottom:1px solid var(--line);font-size:12px;color:var(--ink);letter-spacing:.15px}.impurity-grid-head span{padding:10px 12px;border-right:1px solid var(--line);font-family:Georgia,serif}.impurity-grid-head span:first-child{position:sticky;left:0;z-index:8;background:var(--bg);font-family:var(--font);font-size:10px;letter-spacing:1px;text-transform:uppercase;color:var(--muted)}.impurity-row{border-bottom:1px solid var(--line);align-items:stretch}.compound-cell,.medium-cell{padding:11px 12px;border-right:1px solid var(--line);min-width:0}.compound-cell{position:sticky;left:0;z-index:4;background:var(--bg);display:grid;grid-template-columns:92px 1fr;gap:12px;align-items:center}.compound-structure{width:88px;height:68px;object-fit:contain;background:transparent;transform:scale(1.28);mix-blend-mode:multiply}.compound-cell strong{display:block;font:16px Georgia,serif;font-weight:400;line-height:1.2}.compound-meta{display:block;font-size:10.5px;color:var(--muted);margin-top:5px;line-height:1.35}.medium-cell{background:transparent}.medium-cell.empty{color:#adb6b3;display:flex;align-items:center}.signal-entry{display:grid;grid-template-columns:72px minmax(0,1fr);grid-template-areas:"shift site" "mult mult";column-gap:10px;row-gap:2px;align-items:baseline;padding:0 0 8px;margin:0 0 8px;border-bottom:1px solid rgba(214,220,218,.72)}.signal-entry:last-child{margin-bottom:0;padding-bottom:0;border-bottom:0}.signal-shift{grid-area:shift;font:13px Georgia,serif;color:var(--blue);font-variant-numeric:tabular-nums;white-space:nowrap}.signal-site{grid-area:site;font-size:12px;line-height:1.3;min-width:0;overflow-wrap:anywhere}.signal-mult{grid-area:mult;font-size:10.5px;color:var(--muted);line-height:1.35;min-width:0;padding-left:82px;overflow-wrap:anywhere}.source-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:30px;margin-top:16px}.source-grid p{font-size:12px;margin:0}.source-grid strong{font-family:Georgia,serif}.site-footer{padding:28px 40px 35px;border-top:2px solid var(--ink);display:flex;justify-content:space-between;font-size:10px;color:var(--muted)}.site-footer-brand{display:flex;flex-direction:column;align-items:flex-start;gap:3px;font-family:Georgia,"Times New Roman",serif}.footer-parent-link,.footer-section-link{color:#203139;text-decoration:none;width:max-content}.footer-parent-link{font-size:16px;letter-spacing:-.3px}.footer-section-link{font-size:13px}.footer-brand-o,.footer-brand-dot{color:#b68c37}.footer-parent-link:is(:hover,:active,:focus-visible),.footer-section-link:is(:hover,:active,:focus-visible){color:#355c7d;text-decoration:underline;text-decoration-thickness:1px;text-underline-offset:.18em;text-decoration-skip-ink:auto}.footer-parent-link:is(:hover,:active,:focus-visible) .footer-brand-o,.footer-parent-link:is(:hover,:active,:focus-visible) .footer-brand-dot{color:#b68c37}.site-footer-brand small{margin-top:4px;color:var(--muted);font-size:9px;letter-spacing:.5px;font-family:var(--font)}.footer-right{text-align:right;max-width:560px}
@media(max-width:1549px){.atlas-wide{width:min(1360px,calc(100% - 56px))}.periodic-section::before,.periodic-section::after{width:min(1360px,calc(100% - 56px))}.periodic-full-grid{display:none}.periodic-section-stack{--cell:112px}.periodic-scroll{overflow-x:auto}.periodic-grid.sp,.periodic-grid.d,.periodic-grid.f{min-width:max-content}.data-key{gap:12px}.layout-note{display:none}.element-main .symbol{font-size:24px}.isotope-cell .line{font-size:8.5px}.isotope-cell .freq{font-size:9.5px}.isotope-cell .recept{font-size:8.5px}}
@media(min-width:1550px){.periodic-section-stack{display:none}.periodic-full-grid{display:grid}}
@media(max-width:1100px){.container{width:calc(100% - 56px)}.atlas-wide{width:calc(100% - 40px)}.periodic-section::before,.periodic-section::after{width:calc(100% - 40px)}.intro-grid{grid-template-columns:1fr}.formula{align-items:flex-start}.control-band{grid-template-columns:1fr 1fr}.field-control:nth-child(2){border-right:0}.nominal,.presets{border-top:1px solid var(--line)}.periodic-tools{grid-template-columns:1fr auto}.legend{grid-column:1/-1}.periodic-section-stack{--cell:116px}.comparison-heading{display:block}.comparison-controls{margin-top:16px}.solvent-browser{grid-template-columns:320px 1fr}.compound-head{grid-template-columns:160px 1fr}.spectrum-toggle{grid-column:1/-1}.source-grid{grid-template-columns:1fr}}
@media(max-width:760px){.container{width:calc(100% - 36px)}.atlas-wide{width:calc(100% - 24px)}.periodic-section::before,.periodic-section::after{width:calc(100% - 24px)}.header-inner{display:block;padding:18px 0 14px}.site-nav{margin-top:15px;justify-content:space-between;font-size:11px;gap:8px}.intro{padding-top:35px}.intro h1{font-size:46px;letter-spacing:-2px}.lede{font-size:15px}.control-band{grid-template-columns:1fr}.field-control,.presets{border-right:0;border-top:1px solid var(--line)}.control-band>.field-control:first-child{border-top:0}.periodic-tools{grid-template-columns:1fr}.periodic-meta{display:block}.layout-note{display:none}.periodic-section-stack{--cell:118px}.periodic-grid.sp{grid-template-columns:repeat(8,var(--cell));}.periodic-grid.d{grid-template-columns:repeat(10,var(--cell));}.periodic-grid.f{grid-template-columns:repeat(15,var(--cell));}.table-caption{display:block}.table-caption span{display:block}.comparison-controls{width:150px}.section-heading{display:block}.section-note{margin-top:8px}.solvent-browser{grid-template-columns:1fr}.solvent-list{border-right:0;border-bottom:1px solid var(--line)}.solvent-viewer{padding:20px}.compound-head{grid-template-columns:110px 1fr}.structure-plain{height:112px}.structure-plain img{width:145px;height:108px;transform:scale(1.3)}.stick-plot{height:150px}.impurity-toolbar{grid-template-columns:1fr auto}.site-footer{padding:22px 18px 30px;display:block}.footer-right{text-align:left;margin-top:15px}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}.element-block{transition:none}}