/* Only the height of the original two portals changes. Their horizontal layout,
   artwork and typography remain unchanged; the background is one shared field. */
.portal-shell{grid-template-rows:62% 38%}
body[data-route=home]{background:transparent}
.portal.chemistry{grid-column:1 / -1;position:relative;overflow:hidden;background:transparent;display:flex;flex-direction:row;align-items:center;justify-content:center;gap:clamp(22px,5vw,100px)}
.portal.chemistry h2{position:static;writing-mode:horizontal-tb;font-size:clamp(26px,3.2vw,48px);letter-spacing:.1em;font-weight:400;color:#8b674b;margin:0;transition:transform 620ms cubic-bezier(.16,1,.3,1)}
.chemistry-portal-art{width:clamp(160px,24vw,290px);height:90%;max-height:220px;overflow:visible;transition:transform 620ms cubic-bezier(.16,1,.3,1)}
.chemistry-entry-arrow{position:absolute;right:7%;color:#b99a80;font-size:24px;font-weight:300}
@media(hover:hover){.portal.chemistry:hover .chemistry-portal-art{transform:translateY(-4px) rotate(-3deg)}.portal.chemistry:hover h2{transform:translateY(-3px)}}
.chemistry-view{inset:0;background:#fff;color:#303338;overflow:hidden;z-index:61;font-size:13px}
body[data-route=chemistry] .site-header{display:none}
.chemistry-view button,.chemistry-view input{font:inherit}
.chemistry-view a:focus-visible,.chemistry-view button:focus-visible,.chemistry-view canvas:focus-visible{outline:2px solid #bd9675;outline-offset:-2px}
.chemistry-view input:focus-visible{outline:2px solid #bd9675;outline-offset:3px;border-radius:2px}
.chem-back{display:grid;place-items:center;width:42px;height:44px;flex-shrink:0;border-radius:50%;color:#6c6259}
.chem-back svg{width:24px;height:24px}
.chem-hub{height:100%;overflow:auto;background:radial-gradient(ellipse at 10% 100%,#f8e8d1bb,transparent 70%),linear-gradient(125deg,#fffdf9,#fff4e7)}
.chem-hub-back{position:absolute;left:max(14px,env(safe-area-inset-left));top:max(12px,env(safe-area-inset-top))}
.chem-hub-content{min-height:100%;max-width:980px;margin:auto;padding:80px 32px 50px;display:flex;flex-direction:column;justify-content:center}
.chem-hub-content>h1{font-size:16px;font-weight:400;letter-spacing:.15em;margin:0 0 30px 2px;color:#9a7b61}
.chem-choice-grid{display:grid;grid-template-columns:1fr 1fr;gap:22px}
.chem-choice{height:300px;border:1px solid #eadbca;border-radius:18px;background:linear-gradient(135deg,#ffffffc9,#fff9f1a6);position:relative;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:28px;transition:transform 250ms ease,border-color 250ms ease}
.chem-choice:hover{transform:translateY(-3px);border-color:#d7b99e}
.chem-choice h2{font-size:21px;font-weight:400;letter-spacing:.08em;margin:0;color:#775c45}
.chem-choice-art{width:220px;height:144px}
.chem-table-art{width:205px;height:120px;display:grid;grid-template-columns:repeat(7,1fr);gap:5px;align-content:center;transform:rotate(-7deg)}
.chem-table-art span{border:1px solid #c3ab93;background:#f6e7d59c;color:#9a7b61;font:11px Georgia,serif;aspect-ratio:1;display:grid;place-items:center;border-radius:2px}
.chem-table-art .blank{visibility:hidden}
.chem-choice-arrow{position:absolute;right:20px;bottom:20px;font-size:19px;color:#b3957b}
.chem-library{height:100%;overflow:auto;overscroll-behavior:contain;padding-bottom:max(24px,env(safe-area-inset-bottom));background:#fcfbf8}
.chem-page-head{position:sticky;top:0;z-index:12;display:flex;align-items:center;gap:10px;min-height:70px;padding:12px max(18px,env(safe-area-inset-right)) 10px max(14px,env(safe-area-inset-left));padding-top:max(12px,env(safe-area-inset-top));background:#fcfbf8f5}
.chem-page-head h1{font-size:15px;font-weight:400;margin:0;flex:1;color:#665a50}
.chem-search{height:42px;max-width:680px;flex:1;display:flex;align-items:center;gap:10px;padding:0 12px;background:#fff;border:1px solid #e6dfd7;border-radius:11px}
.chem-search svg,.chem-element-search svg{width:18px;height:18px;flex-shrink:0;color:#998c80}
.chem-search input,.chem-element-search input{width:100%;min-width:0;border:0;outline:0;background:none;color:#3c3a37;height:30px;font-size:13px}
.chem-search input::placeholder,.chem-element-search input::placeholder{color:#aaa096}
.chem-search button{font-size:12px;color:#957252;padding:7px 0 7px 8px;border-left:1px solid #eee7df;flex-shrink:0}
.chem-gallery-heading{display:flex;align-items:center;flex-wrap:wrap;gap:14px;max-width:1180px;margin:26px auto 18px;padding:0 24px}
.chem-gallery-heading h1{font-size:17px;font-weight:400;margin:0;letter-spacing:.04em}
.chem-count{margin-left:auto;color:#a3978a;font-size:12px}
.chem-filter button{font-size:12px;border:1px solid #e6d1ba;border-radius:7px;padding:6px 10px;background:#f8eddf;color:#896746}
.chem-filter button span{padding-left:9px}
.chem-model-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:12px;max-width:1180px;margin:auto;padding:0 24px}
.chem-model-card{position:relative;display:flex;align-items:center;gap:13px;padding:18px 25px 18px 10px;border:1px solid #e9e3dc;border-radius:14px;background:#fffefa;min-height:135px;transition:border-color 180ms ease,background 180ms ease}
.chem-model-card:hover{border-color:#c9ad92;background:#fffaf3}
.chem-model-card>svg{width:70px;height:70px;flex-shrink:0}
.chem-model-card>div{flex:1;min-width:0}
.chem-card-name{font-size:15px;font-weight:500;display:flex;align-items:baseline;flex-wrap:wrap;gap:10px}
.chem-card-name>span{font:13px Georgia,"Times New Roman",serif;color:#9c8c7e;font-weight:400}
.chem-model-card p{font-size:12px;line-height:1.7;color:#938578;margin:7px 0 10px}
.chem-card-tags{display:flex;flex-wrap:wrap;gap:6px}
.chem-card-tags span{font-size:10px;padding:3px 6px;border-radius:4px;border:1px solid #ede4db;color:#a18c7a}
.chem-card-arrow{position:absolute;right:12px;top:18px;color:#baab9b;font-size:17px}
.chem-empty{text-align:center;color:#9e9083;margin:80px 20px;font-size:13px}
.chem-element-search{display:flex;align-items:center;gap:10px;max-width:250px;flex:1;padding:6px 12px;background:#fff;border:1px solid #e7dfd5;border-radius:10px}
.chem-periodic-scroll{overflow:auto;padding:20px 24px 30px;overscroll-behavior:contain}
.chem-periodic{display:grid;grid-template-columns:20px repeat(18,minmax(48px,1fr));grid-template-rows:20px repeat(7,minmax(73px,auto)) 16px repeat(2,minmax(73px,auto));gap:5px;max-width:1400px;min-width:1030px;margin:auto}
.chem-element{position:relative;display:flex;flex-direction:column;justify-content:center;align-items:center;border:1px solid #e7e1d9;border-radius:5px;background:#fffefb;color:#8d8379;min-width:0;min-height:73px;transition:opacity 160ms,border-color 160ms,background 160ms}
.chem-element small{position:absolute;top:4px;left:5px;font-size:9px;line-height:12px}
.chem-element strong{font:22px/26px Georgia,"Times New Roman",serif;margin-top:8px;font-weight:400}
.chem-element>span{font-size:11px;line-height:18px;white-space:nowrap}
.chem-element.has-models{background:#f9e7d1;border-color:#dec0a0;color:#79583b}
.chem-element:hover{border-color:#a7805c;background:#f6e9d8}
.chem-element i{position:absolute;top:4px;right:4px;font-size:8px;font-style:normal;color:#b9906a}
.chem-element.is-muted{opacity:.2}
.chem-group,.chem-period,.chem-series-label,.chem-series{display:flex;align-items:center;justify-content:center;color:#ad9f91;font-size:10px}
.chem-series{border:1px dashed #dfd2c5;border-radius:5px;font-size:9px}
.chem-element-results{padding:0 24px;max-width:600px;margin:auto;display:flex;flex-direction:column;gap:6px}
.chem-element-results a{display:flex;gap:12px;align-items:center;border-bottom:1px solid #ede5dc;padding:12px;color:#7c6552}
.chem-element-results strong{font:20px Georgia,serif;width:36px}
.chem-element-results a>span{margin-left:auto;font-size:11px;color:#ae9279}
.chem-model{height:100%;display:flex;flex-direction:column;background:#fff}
.chem-model .chem-page-head{position:relative;background:#fff;flex-shrink:0}
.chem-model-search-wrap{position:relative;flex:1;max-width:680px}
.chem-model .chem-search{max-width:none}
.chem-search-results{position:absolute;z-index:18;top:48px;left:0;right:0;padding:6px;border:1px solid #e6dfd7;background:#fffefa;border-radius:12px;box-shadow:0 12px 28px #4e362316;max-height:50vh;overflow:auto}
.chem-search-results a{display:flex;align-items:center;gap:10px;justify-content:space-between;padding:12px;border-radius:7px;color:#66523f}
.chem-search-results a:hover{background:#f6eddf}
.chem-search-results small{font:13px Georgia,serif;color:#a3978a}
.chem-search-results p{padding:8px 12px;color:#a3978a;font-size:12px}
.chem-model-layout{display:grid;grid-template-columns:minmax(0,1fr) 300px;min-height:0;flex:1;overflow:hidden}
.chem-paper{position:relative;min-width:0;min-height:0;background:#fff;overflow:hidden}
.chem-paper-title{position:absolute;top:8px;left:30px;right:26px;display:flex;justify-content:space-between;align-items:center;pointer-events:none;z-index:2}
.chem-paper-title>div{display:flex;align-items:baseline;flex-wrap:wrap;gap:16px}
.chem-paper-title h1{font-size:20px;font-weight:400;letter-spacing:.08em;margin:0}
.chem-formula{font:17px Georgia,"Times New Roman",serif;color:#a7a19b}
.chem-reset{pointer-events:auto;font-size:23px!important;color:#8e8a85;width:38px;height:38px}
#chemistry-canvas{display:block;width:100%;height:100%;touch-action:none;cursor:grab}
#chemistry-canvas:active{cursor:grabbing}
.chem-legend{position:absolute;bottom:20px;left:50%;transform:translateX(-50%);display:flex;gap:18px;align-items:center;pointer-events:none;color:#a5a29d;font-size:10px;white-space:nowrap}
.chem-legend>span{display:flex;align-items:center;gap:5px}
.chem-phase{width:8px;height:8px;display:inline-block;border-radius:50%}
.chem-phase.positive{background:#accadb}.chem-phase.negative{background:#eacbb0}.chem-phase.hybrid{background:#cecfce}
.chem-lone-symbol{width:18px;height:14px;fill:none;stroke:#77736e;stroke-width:1;overflow:visible}.chem-lone-symbol circle{fill:#4f4b47;stroke:none}
.chem-information{padding:20px 24px 30px 20px;overflow:auto;overscroll-behavior:contain;border-left:1px solid #f2ede7;background:#fffdfa;min-height:0}
.chem-atom-tabs{display:flex;gap:6px;flex-wrap:wrap;margin-bottom:25px}
.chem-atom-tabs button{border:1px solid #e9e1d7;border-radius:7px;min-width:35px;height:34px;color:#9c8c7b;font:15px Georgia,serif}
.chem-atom-tabs button[aria-pressed=true]{border-color:#d2b496;background:#f7e8d6;color:#805e40}
.chem-atom-tabs small{font-size:10px}
.chem-atom-heading{display:flex;justify-content:space-between;align-items:baseline;gap:8px}
.chem-atom-heading h2{margin:0;font:23px Georgia,"Times New Roman",serif;font-weight:400}
.chem-atom-heading h2 span{font:12px system-ui,sans-serif;color:#a5988a;padding-left:6px}
.chem-atom-heading strong{font-size:15px;font-weight:400;color:#8a6444}
.chem-atom-info dl{margin:24px 0 0}
.chem-atom-info dt{font-size:10px;color:#b0a394;margin:18px 0 7px;letter-spacing:.07em}
.chem-atom-info dd{margin:0;font-size:12px;line-height:1.9;color:#655d54}
.chem-key-point{font-size:12px;line-height:1.9;color:#8e6b49;margin:22px 0 16px;border-left:2px solid #e0c5a7;padding:0 0 0 12px}
.chem-related{display:flex;justify-content:space-between;color:#9e8369;font-size:11px;padding:10px 0}
.chem-layer-controls{margin:24px 0 20px;display:grid;grid-template-columns:1fr 1fr;gap:10px 5px;border-top:1px solid #eee7de;padding-top:20px}
.chem-layer-controls button{padding:4px 0;display:flex;align-items:center;gap:7px;text-align:left;font-size:10px;color:#9c9286}
.chem-check{width:12px;height:12px;border:1px solid #ddcdbb;border-radius:3px;position:relative;flex-shrink:0}
[aria-pressed=true]>.chem-check{background:#b88c61;border-color:#b88c61}
[aria-pressed=true]>.chem-check:after{content:"";position:absolute;left:3px;top:0;width:3px;height:6px;border:solid white;border-width:0 1px 1px 0;transform:rotate(45deg)}
.chem-model-caution{font-size:10px;color:#b0a497;line-height:1.8;margin:0}
.chem-references{font-size:10px;color:#b0a497;margin-top:16px}
.chem-references summary{cursor:pointer;width:fit-content}
.chem-references a{display:block;color:#99836c;margin-top:10px;line-height:1.6}
@media(min-width:1500px){.chem-information{padding:35px}.chem-model-layout{grid-template-columns:minmax(0,1fr) 350px}}
@media(max-width:680px){
 .portal-shell{grid-template-rows:64% 36%}.portal.chemistry{gap:8px}.portal.chemistry h2{font-size:26px}.chemistry-portal-art{width:165px;height:88%;max-height:160px}.chemistry-entry-arrow{right:5%;font-size:20px}
 .chem-hub-content{padding:76px 22px 30px}.chem-choice-grid{gap:12px}.chem-choice{height:240px;gap:24px}.chem-choice h2{font-size:16px}.chem-choice-art{width:150px;height:120px}.chem-table-art{width:130px;height:115px;gap:3px}.chem-table-art span{font-size:8px}.chem-choice-arrow{right:14px;bottom:13px;font-size:16px}
 .chem-page-head{padding-left:8px;padding-right:14px;gap:6px;min-height:65px}.chem-search{gap:8px;padding:0 10px}.chem-search input{font-size:12px}.chem-search button{font-size:11px}.chem-element-search{max-width:200px;padding:3px 8px}.chem-element-search input{font-size:11px}
 .chem-gallery-heading{padding:0 18px;margin-top:20px}.chem-model-grid{padding:0 14px;grid-template-columns:1fr}.chem-model-card{min-height:125px}.chem-gallery-heading h1{font-size:15px}.chem-periodic-scroll{padding:14px 12px 24px}
 .chem-model-layout{display:flex;flex-direction:column}.chem-paper{flex:1;min-height:180px}.chem-information{flex:0 0 auto;max-height:43%;border-left:0;border-top:1px solid #f2ede7;padding:14px 20px 24px;padding-bottom:max(24px,env(safe-area-inset-bottom))}
 .chem-paper-title{top:4px;left:20px;right:16px}.chem-paper-title h1{font-size:17px}.chem-formula{font-size:15px}.chem-legend{bottom:8px;font-size:9px}.chem-atom-tabs{margin-bottom:14px}.chem-atom-info dl{margin-top:15px}.chem-atom-info dt{margin-top:10px}.chem-key-point{margin-top:15px}.chem-layer-controls{margin-top:16px;padding-top:14px;grid-template-columns:repeat(4,1fr);gap:5px}.chem-layer-controls button{font-size:9px;gap:5px}.chem-atom-heading h2{font-size:20px}
}
@media(max-width:380px){.chem-choice-grid{grid-template-columns:1fr}.chem-choice{height:185px;flex-direction:row;gap:10px}.chem-choice-art{width:130px}.chem-hub-content{justify-content:flex-start}.chem-layer-controls{grid-template-columns:1fr 1fr}}
@media(max-height:520px) and (min-width:681px){.chem-page-head{min-height:55px;padding-top:5px;padding-bottom:5px}.chem-choice{height:240px}.chem-hub-content{padding:45px 32px 24px}.chem-hub-content>h1{margin-bottom:15px}.chem-paper-title h1{font-size:17px}}
@media(prefers-reduced-motion:reduce){.chemistry-portal-art,.portal.chemistry h2,.chem-choice,.chem-model-card,.chem-element{transition:none}.chem-choice:hover,.portal.chemistry:hover .chemistry-portal-art,.portal.chemistry:hover h2{transform:none}}
@media(forced-colors:active){body[data-route=home]{background:Canvas}.portal.chemistry,.chemistry-view,.chem-hub,.chem-library,.chem-information,.chem-choice,.chem-model-card,.chem-element,.chem-search,.chem-search-results{background:Canvas;color:CanvasText}.chem-element.has-models,.chem-atom-tabs [aria-pressed=true]{outline:1px solid Highlight}}

.chem-atom-tabs button.chem-resonance{margin-left:auto;padding:0 9px;font:10px system-ui,sans-serif;white-space:nowrap;color:#9e8369}
/* Retained GPU surfaces under the existing paper-ink canvas. */
.chem-surface{position:absolute;inset:0;width:100%;height:100%;pointer-events:none;z-index:0}
#chemistry-canvas,.crystal-canvas{position:relative;z-index:1}
.chem-legend{z-index:2}
.chem-crystal-choice{grid-column:1 / -1;height:190px;flex-direction:row;gap:30px}
.chem-crystal-choice .chem-choice-art{width:130px;height:120px}
.crystal-root{height:100%;min-height:0}
.crystal-canvas{display:block;width:100%;height:100%;touch-action:none;cursor:grab}
.crystal-canvas:active{cursor:grabbing}
.crystal-view-controls{position:absolute;top:63px;left:30px;right:20px;display:flex;gap:8px;flex-wrap:wrap;z-index:2}
.crystal-view-controls button{display:flex;gap:5px;align-items:center;border:1px solid #e6d7c6;border-radius:6px;padding:6px 9px;color:#9e8a75;background:#fffefaeb;font-size:10px}
.crystal-view-controls button[aria-pressed=true]{color:#805e40;background:#f7e8d6;border-color:#d2b496}
.crystal-layout{grid-template-columns:minmax(0,1fr) 380px}
.crystal-section-title{font-size:14px;font-weight:400;color:#725b46;margin:4px 0 16px}
.crystal-section-title:not(:first-child){border-top:1px solid #eee7de;padding-top:22px;margin-top:24px}
.crystal-structure,.crystal-selection{font-size:11px;line-height:1.8;color:#958471;margin:10px 0}
.crystal-selection{min-height:20px;color:#8e6b49}
.crystal-table{border-collapse:collapse;width:100%;font-size:10px;color:#756a5f;margin:14px 0 20px;font-variant-numeric:tabular-nums}
.crystal-table caption{font-size:11px;text-align:left;margin-bottom:10px;color:#9b8c7d}
.crystal-table th{font-weight:400;color:#9c8b79;text-align:left}
.crystal-table th,.crystal-table td{padding:8px 4px;border-bottom:1px solid #eee7de;overflow-wrap:anywhere}
.crystal-table td{text-align:right}
.crystal-example{font-size:10px;line-height:1.8;color:#a29383;margin:8px 0 14px}
.crystal-input-grid{display:grid;grid-template-columns:1fr 1fr;gap:12px 10px}
.crystal-calculator label{display:flex;flex-direction:column;gap:7px;font-size:10px;color:#9b8774;min-width:0}
.crystal-calculator input,.crystal-calculator select{width:100%;min-width:0;background:#fff;border:1px solid #e4d8ca;border-radius:5px;padding:7px 6px;height:34px;font:11px system-ui,sans-serif;color:#695646}
.crystal-sample{border-top:1px solid #eee7de;margin:18px 0;padding-top:16px;grid-template-columns:1.5fr 1fr}
.crystal-density-input{margin-top:15px}
.crystal-error{color:#a0503d;font-size:11px;line-height:1.8;margin-top:12px}
.crystal-results h3{font-size:12px;font-weight:400;color:#8a6a4d;margin:22px 0 16px}
.crystal-values{display:grid;grid-template-columns:minmax(0,1.3fr) minmax(0,1fr);gap:12px 10px;font-size:11px;line-height:1.7;margin:20px 0;color:#7d6e60;font-variant-numeric:tabular-nums}
.crystal-values dt{color:#a08c79}.crystal-values dd{margin:0;text-align:right;overflow-wrap:anywhere}
.crystal-legend{flex-wrap:wrap;justify-content:center;max-width:80%;white-space:normal}
@media(max-width:680px){.chem-crystal-choice{height:170px;gap:18px}.chem-crystal-choice .chem-choice-art{width:100px;height:105px}.crystal-view-controls{top:49px;left:20px;right:12px;gap:5px}.crystal-view-controls button{padding:5px 7px;font-size:9px}.crystal-layout .chem-paper{min-height:240px}.crystal-layout .chem-information{max-height:43%}.crystal-legend{bottom:8px}}
@media(max-width:380px){.chem-crystal-choice{grid-column:auto}}
@media(forced-colors:active){.home-backdrop{display:none}.crystal-calculator input,.crystal-calculator select,.crystal-view-controls button{background:Canvas;color:CanvasText}.crystal-view-controls button[aria-pressed=true]{outline:1px solid Highlight}}

/* Periodic table owns its live viewport; no inherited library bottom spacer. */
.view.chemistry-view{inset:0;height:100dvh}
body[data-route=chemistry]{min-height:0}
[data-chem-screen=elements]{position:absolute;inset:0;display:flex;flex-direction:column;min-height:0;padding:0;overflow:hidden}
[data-chem-screen=elements].is-rotated{inset:auto;left:50%;top:50%;width:100dvh;height:100vw;transform:translate(-50%,-50%) rotate(90deg)}
[data-chem-screen=elements] .chem-page-head{position:relative;flex-shrink:0;min-height:52px;padding:4px max(8px,env(safe-area-inset-right)) 4px max(4px,env(safe-area-inset-left));gap:4px}
[data-chem-screen=elements] .chem-page-head h1{flex:0 0 auto;font-size:12px}
[data-chem-screen=elements] .chem-element-search{min-width:0;margin-left:auto}
[data-chem-screen=elements] .chem-periodic-scroll{position:relative;flex:1;min-height:0;padding:0;overflow:hidden;touch-action:none}
[data-chem-screen=elements] .chem-periodic{position:absolute;left:0;top:0;margin:0;width:1030px;min-width:1030px;max-width:none;height:790px;grid-template-columns:20px repeat(18,1fr);grid-template-rows:20px repeat(7,78px) 16px repeat(2,79px);transform-origin:0 0;gap:5px}
[data-chem-screen=elements] .chem-element-results{flex-shrink:0;max-height:120px;overflow:auto;width:100%}
.chem-periodic-actions{position:relative;display:flex;align-items:center;flex-shrink:0}
.chem-periodic-actions>button{padding:10px 6px;white-space:nowrap;font-size:12px}
.chem-periodic-tools{position:absolute;right:0;top:100%;width:250px;max-height:calc(100dvh - 60px);overflow:auto;z-index:20;padding:8px;border:1px solid #e7dfd5;border-radius:10px;background:#fff;box-shadow:0 4px 18px #0001}
.chem-periodic-tools>label{display:flex;align-items:center;gap:8px;width:100%;padding:10px;border-radius:8px;cursor:pointer}
.chem-periodic-tools>label:has(input:checked){background:#e2e8f5;color:#1555a2}
.chem-periodic-tools input[type=checkbox]{width:16px;height:16px;margin:0;accent-color:#1555a2;cursor:pointer}
.chem-periodic-tools>a{display:block;padding:6px;font-size:10px;color:#797979}
[data-chem-screen=elements] .chem-periodic,[data-chem-screen=elements] .chem-periodic *{touch-action:none;user-select:none;-webkit-user-select:none;-webkit-touch-callout:none}
.chem-element.has-property{border-color:#bbcee5}
.chem-element.has-property i{color:inherit}
.chem-element .chem-property-value{font-size:10px;line-height:13px;font-variant-numeric:tabular-nums}
@media(max-width:480px){[data-chem-screen=elements] .chem-page-head h1{display:none}[data-chem-screen=elements] .chem-element-search{padding:4px 6px}}

/* Landscape controls overlay the full table viewport; no toolbar/search height reserved. */
[data-chem-screen=elements].is-landscape .chem-page-head{position:absolute;inset:0 0 auto;min-height:0;background:transparent;pointer-events:none;z-index:12}
[data-chem-screen=elements].is-landscape .chem-page-head h1,
[data-chem-screen=elements].is-landscape .chem-element-search,
[data-chem-screen=elements].is-landscape .chem-element-results{display:none!important}
[data-chem-screen=elements].is-landscape .chem-back,
[data-chem-screen=elements].is-landscape .chem-periodic-actions{pointer-events:auto;background:transparent}
[data-chem-screen=elements].is-landscape .chem-periodic-actions{margin-left:auto}
[data-chem-screen=elements].is-landscape .chem-periodic-actions>button{background:transparent}

[data-chem-screen=elements]{background:#fcfbf8}