@font-face{font-family:DM Sans Variable;font-style:normal;font-display:swap;font-weight:100 1000;src:url(/assets/dm-sans-latin-wght-normal-Xz1IZZA0.woff2) format("woff2-variations")}@font-face{font-family:Manrope Variable;font-style:normal;font-display:swap;font-weight:200 800;src:url(/assets/manrope-latin-wght-normal-DHIcAJRg.woff2) format("woff2-variations")}:root{font-family:DM Sans Variable,sans-serif;color:#283b30;background:#f8f9f5;font-synthesis:none;font-weight:400;--green:#284939;--muted:#7d857d;--line:#e5e8df;--lime:#daefac;--serif:Georgia,"Times New Roman",serif}*{box-sizing:border-box}body{margin:0}button,input,select,textarea{font:inherit}button,a,input,select,textarea{-webkit-tap-highlight-color:transparent}button{cursor:pointer}a{color:inherit;text-decoration:none}button{color:inherit;border:0;background:none}h1,h2,h3,p{margin:0}button:disabled{cursor:not-allowed;opacity:.5}button,a,input,select,textarea{outline-offset:4px}button:focus-visible,a:focus-visible,input:focus-visible,select:focus-visible,textarea:focus-visible{outline:2px solid #64843f}svg{flex-shrink:0}::selection{background:#d3e6ad}.app-shell{min-height:100vh}.skip-link{position:fixed;z-index:100;left:15px;top:-80px;padding:15px;background:#fff;border-radius:8px}.skip-link:focus{top:10px}.sidebar{position:fixed;inset:0 auto 0 0;width:242px;background:#fffefa;border-right:1px solid var(--line);padding:36px 21px 25px;display:flex;flex-direction:column;z-index:30}.brand{display:flex;gap:10px;align-items:center;margin:0 8px 48px;font-family:Manrope Variable,sans-serif;font-size:26px;font-weight:800;letter-spacing:-1.3px}.brand-mark{width:41px;height:44px;border-radius:13px 13px 13px 4px;background:var(--green);display:grid;place-items:center;color:#deefb6;transform:rotate(-3deg)}.brand-light{font-weight:500}.brand small{display:block;letter-spacing:1.35px;font-size:7px;font-weight:700;margin-top:4px;color:#8b9387}.sidebar-section{font-size:9px;letter-spacing:1.55px;font-weight:650;color:#92988e;margin:0 14px 17px}.nav-item{display:flex;align-items:center;gap:12px;padding:14px 13px;margin-bottom:6px;border-radius:8px;font-size:12px;color:#6d786d;font-weight:500;transition:.2s}.nav-item svg{stroke-width:1.6}.nav-item:hover{background:#f3f5ed;color:#2e4c36}.nav-item.active{background:#eaf0de;color:#345334;font-weight:700}.nav-item.active svg{stroke-width:2}.mini-new{font-size:6px;letter-spacing:.6px;background:#e8eddf;padding:4px 5px;border-radius:3px;color:#5e7353;margin-left:auto}.sidebar-divider{height:1px;background:var(--line);margin:23px 12px 26px}.grade-select{display:flex;align-items:center;border:1px solid #e1e6db;border-radius:8px;padding:12px;margin:0 11px;color:#5b7058;position:relative}.grade-select select{appearance:none;border:0;outline:none;background:none;flex:1;padding:0 11px;font-size:12px;cursor:pointer;min-width:0}.grade-select>svg:last-child{pointer-events:none}.sidebar-note{margin:29px 8px 25px;background:#f5f5eb;border:1px solid #ececde;border-radius:11px;padding:19px 15px}.note-icon{display:grid;place-items:center;width:35px;height:35px;border-radius:50%;background:#e6ebd6;color:#6e834e;margin-bottom:14px}.sidebar-note h3{font-size:12px;font-weight:650;margin-bottom:9px}.sidebar-note p{font-size:11px;line-height:1.8;color:#8a8e7b}.sidebar-note a{display:flex;align-items:center;justify-content:space-between;margin-top:16px;font-size:10px;font-weight:700;color:#557341}.sidebar-bottom{margin-top:auto;padding:12px 12px 0}.sidebar-bottom>a{display:flex;align-items:center;gap:10px;font-size:11px;color:#747f72;margin-bottom:23px}.sidebar-bottom>div{display:flex;align-items:center;font-size:9px;color:#9a9d93;gap:6px}.status-dot{display:inline-block;width:5px;height:5px;border-radius:50%;background:#9db179}.workspace{margin-left:242px}.topbar{height:85px;border-bottom:1px solid var(--line);display:flex;justify-content:space-between;align-items:center;padding:0 39px;background:#fffefa}.topbar-left,.topbar-right{display:flex;align-items:center;gap:23px}.breadcrumb{font-size:10px;color:#93998f;display:flex;gap:10px;align-items:center}.breadcrumb strong{font-weight:500;color:#5e6b5b}.search-trigger{display:flex;align-items:center;gap:9px;color:#a1a69c;font-size:10px;padding:9px 0}.search-trigger kbd{font-family:inherit;border:1px solid #e5e7df;border-radius:4px;padding:1px 5px;font-size:10px;margin-left:37px}.header-divider{height:27px;width:1px;background:var(--line)}.profile-trigger{display:flex;align-items:center;gap:10px;text-align:left;padding:0}.avatar{width:35px;height:35px;display:grid;place-items:center;background:#e8eddd;border:3px solid #f4f4eb;color:#5a7251;border-radius:50%;font-family:var(--serif);font-size:18px}.profile-trigger>span:nth-child(2){font-size:10px;font-weight:650}.profile-trigger small{display:block;font-weight:400;font-size:9px;color:#92988c;margin-top:4px}.profile-trigger>svg{margin-left:8px;color:#8c9588}.icon-button{width:34px;height:34px;display:grid;place-items:center;border-radius:7px;color:#70806b}.icon-button:hover{background:#edf0e5}.mobile-menu{display:none}main{max-width:1500px;margin:0 auto;padding:35px 39px 0}main:focus{outline:none}.page-heading{display:flex;justify-content:space-between;gap:20px;align-items:center;margin-bottom:27px}.eyebrow{font-size:8px;font-weight:700;letter-spacing:1.55px;color:#8d9882}.page-heading h1{font-family:Manrope Variable,sans-serif;font-size:25px;letter-spacing:-.9px;font-weight:750;margin:9px 0 8px}.wave{display:inline-block;color:#cbb277;margin-left:7px;font-size:32px;font-weight:400;vertical-align:middle}.page-heading p,.section-heading p{font-size:11px;color:#90968a;line-height:1.7}.grade-badge{display:flex;gap:7px;align-items:center;border:1px solid #e3e7d9;border-radius:30px;padding:9px 12px;font-size:9px;color:#6d7a61;white-space:nowrap;background:#f6f7ee;margin-top:8px}.grade-badge>span{color:#c1c8b5}.hero{background:#edf2e1;border:1px solid #e0e7d1;border-radius:15px;min-height:326px;display:flex;overflow:hidden;position:relative}.hero-copy{padding:30px 0 25px 31px;position:relative;z-index:2;width:56%}.hero-label{font-size:7px;letter-spacing:1.8px;color:#789065;font-weight:700;display:inline-flex;align-items:center;gap:7px;border:1px solid #d4dfc4;padding:6px 10px;border-radius:20px}.hero-label>span{width:4px;height:4px;background:#859e66;border-radius:50%}.hero h2{font-family:var(--serif);font-size:43px;font-weight:400;line-height:1.15;letter-spacing:-1.8px;margin:18px 0 15px}.hero h2 em{font-style:normal;color:#71834c}.hero-copy>p{font-size:11px;line-height:1.8;color:#7b8971}.button{border-radius:7px;padding:12px 17px;display:inline-flex;align-items:center;justify-content:center;gap:15px;font-size:11px;font-weight:600;min-height:40px;transition:background .2s,transform .2s}.button:active{transform:translateY(1px)}.button.primary{color:#fafcf2;background:#294b37}.button.primary:hover{background:#3d6144}.button.secondary{background:#edf2e2;color:#4b633b;border:1px solid #dfe7d2}.button.secondary:hover{background:#e1ebcf}.button.muted{background:#f2f3ee;color:#8b9582}.hero .button{margin-top:20px;font-size:10px;padding:12px 17px}.hero-foot{display:flex;gap:18px;font-size:8px;margin-top:18px;color:#8c987d}.hero-foot>span{display:flex;align-items:center;gap:5px}.tiny-dot{width:3px;height:3px;background:#a5b28b;border-radius:50%}.hero-visual{position:absolute;right:0;bottom:3px;width:47%;height:100%;display:flex;align-items:center;justify-content:center}.lab-art{width:100%;overflow:visible;max-height:330px}.art-note{position:absolute;color:#79916a;font-size:8px;border:1px solid #dce4cd;background:#f6f7ecb3;display:flex;align-items:center;gap:5px;padding:8px 11px;border-radius:6px;z-index:1}.note-top{top:27px;right:45px;transform:rotate(5deg)}.note-bottom{bottom:20px;right:42px;transform:rotate(-3deg)}.stats-row{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;margin:22px 0 33px}.stat{border:1px solid #e7e9e0;background:#fffefa;border-radius:10px;padding:17px 16px;display:flex;gap:12px;align-items:center}.stat-icon{width:40px;height:40px;border-radius:11px;display:grid;place-items:center}.stat-icon.sage{background:#ecf1e2;color:#7c9262}.stat-icon.peach{background:#faeee4;color:#bc9879}.stat-icon.lavender{background:#efedf6;color:#a69aba}.stat-icon.yellow{background:#f6f1de;color:#b4a064}.stat strong{display:block;font-size:20px;font-weight:650;letter-spacing:-.6px}.stat>div>span{display:block;font-size:9px;color:#9a9f93;margin-top:4px}.dashboard-grid{display:grid;grid-template-columns:minmax(0,1fr) 235px;gap:24px}.section-heading{display:flex;align-items:center;justify-content:space-between;gap:15px;margin-bottom:18px}.section-heading h2{font-size:16px;font-family:Manrope Variable,sans-serif;font-weight:750;letter-spacing:-.5px}.section-heading p{font-size:10px;margin-top:5px}.text-link{display:inline-flex;align-items:center;gap:8px;color:#6e8654;font-size:9px;font-weight:600;padding:0;white-space:nowrap}.text-link:hover{color:#324f2a}.grade-tabs{display:flex;gap:6px;background:#ecefe6;border:1px solid #e6eadf;border-radius:8px;padding:4px;margin:20px 0 16px;width:100%}.grade-tabs button{padding:8px 10px;flex:1;font-size:10px;color:#939b88;border-radius:5px;white-space:nowrap}.grade-tabs button.selected{color:#506c3f;background:#fffefa;box-shadow:0 1px 4px #3d4e2110;font-weight:650}.course-panel{background:#fffefa;border:1px solid var(--line);border-radius:12px;overflow:hidden}.course-heading{display:flex;gap:13px;align-items:center;padding:22px 22px 16px}.course-icon{width:43px;height:43px;display:grid;place-items:center;background:#edf2e4;border-radius:11px;color:#81966a}.course-heading .eyebrow{font-size:7px;letter-spacing:1.2px}.course-heading h3{font-size:14px;margin-top:5px;font-weight:650;letter-spacing:-.25px}.course-progress{margin-left:auto;display:flex;flex-direction:column;align-items:flex-end;gap:5px}.course-progress strong{font-size:14px;font-weight:600;color:#77915e}.course-progress>span{font-size:8px;color:#a1a696}.progress-track{height:4px;background:#edf0e6;border-radius:4px;overflow:hidden}.progress-track>div{height:100%;background:#a8c77c;border-radius:4px;transition:width .4s}.course-panel>.progress-track{margin:0 22px 7px}.lesson-list{padding:0 22px}.lesson-row{display:flex;align-items:center;gap:12px;width:100%;text-align:left;padding:17px 0;border-bottom:1px solid #edf0e6}.lesson-row:last-child{border:0}.lesson-index{height:31px;width:31px;display:grid;place-items:center;border:1px solid #e4e9da;color:#7f916a;background:#f7f8f0;border-radius:8px;font-size:10px}.lesson-index.done{background:#e5efd6;color:#5b7e3d}.lesson-row-copy{flex:1;min-width:0}.lesson-row-copy strong{font-size:10px;font-weight:550}.lesson-row-copy small{display:flex;align-items:center;gap:5px;color:#a4aa9a;font-size:8px;margin-top:7px}.lesson-action{color:#819367;display:grid;place-items:center;width:26px;height:26px;background:#f0f4e8;border:1px solid #e5ecd9;border-radius:50%}.lesson-row.locked .lesson-action{background:none;border:0;color:#bbc3b0}.lesson-row.locked .lesson-row-copy strong{color:#90998a}.lesson-row:hover .lesson-row-copy strong{color:#395b2d}.course-all{width:100%;display:flex;justify-content:center;align-items:center;gap:8px;background:#fafbf6;padding:13px;font-size:9px;color:#8a9a77;border-top:1px solid #ecefe4}.lab-section-heading{margin-top:29px}.soft-label{font-size:7px;letter-spacing:1px;color:#9ba28e;background:#edf0e6;border:1px solid #e3e9d8;border-radius:4px;padding:5px 7px;white-space:nowrap}.lab-cards{display:grid;grid-template-columns:1fr 1fr;gap:16px}.lab-card{padding:0;border:1px solid #e4e8db;border-radius:11px;overflow:hidden;background:#fffefa;text-align:left;transition:transform .2s,box-shadow .2s}.lab-card:hover{transform:translateY(-3px);box-shadow:0 8px 20px #2b4a2810}.lab-card-visual{height:115px;display:flex;align-items:center;justify-content:center;position:relative;background:#edf2e5;overflow:hidden;background-image:radial-gradient(#c6d4b980 1px,transparent 1px);background-size:15px 15px}.lab-card.pink .lab-card-visual{background-color:#f2eae9;background-image:radial-gradient(#d8c0c080 1px,transparent 1px)}.lab-chip{position:absolute;right:10px;top:10px;font-size:7px;color:#8a9980;background:#fafbf5a6;padding:4px 7px;border:1px solid #e1e8d6;border-radius:4px}.pink .lab-chip{color:#b89c9a;border-color:#eadcda}.lab-card-copy{padding:16px}.lab-card-copy h3{font-size:12px;font-weight:600;margin-bottom:7px}.lab-card-copy p{font-size:9px;color:#a3a898;line-height:1.6}.lab-card-copy>span{display:flex;align-items:center;justify-content:space-between;margin-top:16px;font-size:9px;font-weight:550;color:#83996c}.mini-beaker{width:64px;height:75px;border:2px solid #9bae8c;border-top:0;border-radius:3px 3px 12px 12px;position:relative;margin-top:11px;transform:rotate(-7deg);background:#ffffff70;box-shadow:inset 6px 0 #ffffff80}.mini-beaker:before{content:"";position:absolute;top:-3px;left:-4px;width:68px;height:3px;background:#9bae8c;border-radius:2px}.mini-beaker>i{position:absolute;bottom:3px;left:3px;right:3px;height:40px;background:#aec57f9c;border-radius:40% 30% 9px 9px}.mini-beaker b{position:absolute;right:7px;top:15px;height:1px;width:11px;background:#a2b18c}.mini-beaker b:nth-child(3){top:30px}.mini-beaker b:nth-child(4){top:45px}.test-tubes{display:flex;gap:14px;transform:rotate(12deg)}.test-tubes i{display:block;width:22px;height:72px;border:2px solid #c0a6a4;border-radius:3px 3px 14px 14px;background:linear-gradient(#fff7 40%,#be8a88ab 40%);position:relative}.test-tubes i:before{content:"";position:absolute;top:-3px;left:-4px;height:3px;width:26px;background:#c0a6a4;border-radius:3px}.test-tubes i:nth-child(2){transform:translateY(-8px);background:linear-gradient(#fff7 30%,#d7b474ab 30%)}.test-tubes i:nth-child(3){background:linear-gradient(#fff7 50%,#b5b78eab 50%)}.dashboard-aside{padding-top:1px}.element-day{background:#f6f2e7;border:1px solid #e8e4d7;border-radius:12px;padding:20px}.card-top{display:flex;align-items:center;justify-content:space-between;color:#b4a17b}.card-top .eyebrow{font-size:7px;color:#a79c83}.featured-element{display:flex;flex-direction:column;align-items:center;background:#f0ead9;border:1px solid #d5c9a6;border-radius:10px;width:103px;min-height:119px;position:relative;margin:23px auto 18px;padding:16px 10px 12px;box-shadow:3px 3px #eae3ce}.element-number{position:absolute;left:10px;top:8px;font-size:10px;color:#a19375}.featured-element>strong{font-family:var(--serif);font-weight:400;color:#7d704f;font-size:55px;line-height:1.05}.featured-element>span:not(.element-number){font-size:10px;margin-top:7px;color:#95876a}.featured-element>small{font-size:7px;color:#ada084;margin-top:5px}.element-day h3{font-size:12px;font-weight:600;line-height:1.5;margin-bottom:10px}.element-day>p{font-size:10px;color:#a49c86;line-height:1.9}.element-day>.text-link{margin-top:20px;font-size:9px;color:#9a8963}.approach-card{border:1px solid var(--line);border-radius:12px;padding:22px 20px;background:#fffefa;margin-top:20px}.approach-symbol{width:42px;height:42px;display:grid;place-items:center;border:1px solid #e3e8d6;border-radius:50%;background:#f3f5e9;color:#8d9c76;margin-bottom:16px}.approach-card h3{font-size:12px;line-height:1.6;margin-bottom:9px;font-weight:600}.approach-card>p{font-size:9px;color:#a2a793;line-height:1.9;margin-bottom:14px}.approach-card>div:not(.approach-symbol){display:flex;gap:7px;font-size:9px;color:#8d9b7a;margin-top:10px;align-items:center}.approach-card>.text-link{margin-top:21px;font-size:8px}.page-intro{margin:6px 0 29px;max-width:730px}.page-intro h1{font-family:Manrope Variable,sans-serif;font-size:31px;letter-spacing:-1px;margin:12px 0;font-weight:750}.page-intro p{font-size:13px;line-height:1.9;color:#87917f}.grade-tabs.big{max-width:650px;margin-bottom:25px}.grade-tabs.big button{font-size:12px;padding:10px}.curriculum-banner{display:flex;align-items:center;gap:20px;background:#eaf0df;border:1px solid #dfe7d3;border-radius:12px;padding:25px;margin-bottom:23px}.curriculum-banner>svg{color:#839b6b}.curriculum-banner h2{font-size:20px;letter-spacing:-.6px}.curriculum-banner p{font-size:11px;color:#8b987b;margin-top:9px}.curriculum-banner>span{margin-left:auto;font-size:11px;color:#7d9366}.curriculum-list{display:grid;gap:15px}.curriculum-card{display:flex;align-items:center;gap:24px;padding:27px;background:#fffefa;border:1px solid var(--line);border-radius:12px}.step-number{height:54px;width:54px;display:grid;place-items:center;font-family:var(--serif);font-size:24px;color:#94a07e;background:#f0f3e8;border-radius:13px;flex-shrink:0}.step-number.done{color:#6e8d4d;background:#e2edce}.curriculum-card>div:nth-child(2){flex:1}.curriculum-card h2{font-size:17px;letter-spacing:-.4px;margin:7px 0}.curriculum-card p{font-size:11px;color:#9ba28e;line-height:1.7}.lesson-meta{display:flex;align-items:center;gap:16px;font-size:9px;color:#98a08c;margin-top:13px}.lesson-meta>span{display:flex;align-items:center;gap:5px}.notice{display:flex;align-items:center;gap:13px;padding:18px 21px;background:#f1f4e8;border:1px solid #e3e9d7;border-radius:9px;color:#849373;font-size:11px;line-height:1.8;margin:24px 0}.notice>svg{flex-shrink:0}.back-link{margin-bottom:21px;font-size:11px}.lesson-content-grid{display:grid;grid-template-columns:minmax(0,1fr) 290px;gap:25px}.lesson-article{background:#fffefa;padding:31px;border:1px solid var(--line);border-radius:12px}.lesson-article section{margin-bottom:28px}.section-number{font-size:11px;color:#a2b28b;font-weight:700}.lesson-article h2{font-size:21px;letter-spacing:-.5px;margin:9px 0 13px}.lesson-article p{font-size:14px;color:#7a8672;line-height:2.05}.concept-box{display:flex;gap:17px;align-items:center;background:#eff3e5;border:1px solid #dfe7cf;border-radius:9px;padding:22px;margin-bottom:30px;color:#738858}.concept-box small{font-size:8px;letter-spacing:1.2px;display:block;margin-bottom:11px}.concept-box strong{font-size:18px;font-family:var(--serif);font-weight:400;line-height:1.6}.lesson-model{background:#edf2e3;border:1px solid #dfe7d4;border-radius:12px;padding:23px;text-align:center}.lesson-model>.eyebrow{display:block;text-align:left}.atom-model{width:100%;max-width:320px;display:block;margin:auto}.lesson-model h3{font-size:16px;margin:5px 0 12px}.lesson-model p{font-size:11px;color:#89977c;line-height:1.9}.lesson-model .button{margin-top:18px;font-size:10px}.learning-tip{display:flex;align-items:flex-start;gap:12px;padding:22px;color:#93a47f}.learning-tip p{font-size:11px;line-height:1.9}.quiz-panel{background:#fffefa;border:1px solid var(--line);border-radius:12px;margin-top:28px;padding:30px}.quiz-panel .section-heading{margin-bottom:10px}.quiz-panel .section-heading h2{font-size:22px;margin-top:10px}.quiz-panel>p{font-size:12px;color:#929d85;margin:12px 0 22px}.question{border:0;padding:0;margin:25px 0 30px;min-width:0}.question legend{display:flex;gap:10px;align-items:center;font-size:14px;font-weight:600;margin-bottom:16px;line-height:1.8}.question legend>span{display:grid;place-items:center;width:26px;height:26px;background:#edf2e2;border-radius:7px;font-size:11px;flex-shrink:0}.answer{display:flex;align-items:center;gap:11px;padding:14px;margin:9px 0;border:1px solid #e5e9dd;border-radius:7px;font-size:12px;color:#7c8972;cursor:pointer;background:#fafbf6}.answer input{accent-color:#78964e;width:15px;height:15px}.answer>span{flex:1}.answer.correct{border-color:#abc98e;background:#eff6e8;color:#56793c}.answer.incorrect{border-color:#ddaaa2;background:#fcf1ed;color:#b77366}.answer-explanation{font-size:12px;color:#82936e;line-height:1.9;margin-top:12px}.quiz-result{display:flex;gap:20px;align-items:center;justify-content:space-between;background:#f6f1e6;border:1px solid #e9dfc6;border-radius:9px;padding:23px}.quiz-result.success{background:#ecf3e3;border-color:#d7e4c3}.quiz-result strong{font-size:15px}.quiz-result p{font-size:11px;margin-top:9px;color:#8f977d}.lab-tabs{display:flex;gap:9px;padding:6px;background:#edf0e6;border:1px solid #e1e6d7;border-radius:10px;margin-bottom:25px;max-width:800px}.lab-tabs button{display:flex;align-items:center;justify-content:center;gap:9px;flex:1;font-size:11px;padding:11px 13px;border-radius:6px;color:#8c9881}.lab-tabs button.selected{background:#fffefa;box-shadow:0 2px 4px #2032160a;color:#4f6d3e;font-weight:650}.simulation{display:grid;grid-template-columns:1.1fr 1fr;border-radius:15px;border:1px solid #dfe7d2;background:#fffefa;overflow:hidden}.simulation-stage{min-height:440px;background:#edf2e2;position:relative;display:flex;flex-direction:column;align-items:center;justify-content:center;background-image:radial-gradient(#ced9bf80 1px,transparent 1px);background-size:22px 22px;padding:60px 30px 25px}.simulation-top{position:absolute;top:17px;left:22px;right:20px;display:flex;align-items:center;justify-content:space-between}.live-label{font-size:8px;letter-spacing:1.4px;display:flex;gap:6px;align-items:center;color:#8aa173}.live-label>span{width:5px;height:5px;background:#8aa173;border-radius:50%}.simulation-controls{padding:33px 30px}.simulation-controls h2{font-size:23px;letter-spacing:-.6px;margin:12px 0 15px}.simulation-controls>p{font-size:12px;line-height:1.9;color:#8d9982;margin-bottom:25px}.range-label{display:flex;justify-content:space-between;align-items:center;font-size:11px;color:#8b967d;margin:20px 0 15px}.range-label strong{font-size:15px;color:#597442;font-weight:600}input[type=range]{width:100%;accent-color:#7e9c59;cursor:pointer;height:6px}.range-ends{display:flex;justify-content:space-between;font-size:9px;color:#a0ab92;margin-top:9px}.presets{display:flex;gap:8px;margin-top:20px;flex-wrap:wrap}.presets button{font-size:10px;padding:8px 13px;border:1px solid #e0e7d3;background:#f7f9f0;border-radius:5px;color:#889a70}.presets button:hover{background:#e6eed9}.insight{display:flex;gap:10px;padding:17px;background:#f1f5e9;border:1px solid #e2ead6;border-radius:8px;margin-top:24px;color:#8ba16d;align-items:flex-start}.insight p{font-size:11px;line-height:1.9;color:#83946e}.model-disclaimer{display:block;font-size:9px;color:#a2aa97;line-height:1.9;margin-top:17px}.particle-vessel{position:relative;width:245px;height:255px;border:3px solid #93a887;border-top:0;border-radius:3px 3px 24px 24px;background:#ffffff45;margin:27px auto 18px;overflow:hidden;box-shadow:inset 10px 0 #ffffff50}.particle-vessel:before{content:"";height:3px;background:#93a887;position:absolute;top:0;left:0;right:0}.particle-vessel.liquid:after{content:"";position:absolute;left:0;right:0;bottom:0;height:55%;background:#9bb6a225;border-top:1px solid #9bb6a240;z-index:0}.particle{position:absolute;display:block;width:13px;height:13px;border-radius:50%;background:#86a29a;border:1px solid #6f8f87;animation:particle-liquid var(--duration) ease-in-out var(--delay) infinite alternate;z-index:2}.particle i{position:absolute;width:6px;height:6px;border-radius:50%;background:#dbe8c5;border:1px solid #a9bd95;left:-4px;top:4px}.particle i:last-child{left:8px;top:-3px}.solid .particle{animation-name:particle-solid}.gas .particle{animation-name:particle-gas}.vessel-marks{position:absolute;inset:28px 9px 20px auto;display:flex;flex-direction:column;justify-content:space-around;font-size:9px;color:#8ca083;z-index:1}.vessel-marks span:after{content:"";display:inline-block;margin-left:3px;vertical-align:middle;width:16px;height:1px;background:#8ca083}.model-caption{text-align:center;margin-top:13px}.model-caption strong{display:block;font-family:var(--serif);font-size:24px;font-weight:400}.model-caption>span{display:block;font-size:10px;color:#8ca079;margin-top:10px}.simulation-stage>.beaker{height:280px}.beaker{width:100%;max-width:250px;display:block;margin:auto}.ph-scale{display:flex;margin-top:15px;border-radius:4px;overflow:hidden}.ph-scale button{flex:1;min-width:0;padding:6px 0;font-size:8px;color:#fff;text-shadow:0 1px 3px #0007}.control-label{font-size:11px;color:#87967a}.control-label select{width:100%;margin-top:9px;border:1px solid #dfe7d3;border-radius:6px;padding:11px;background:#f8faf3;color:#5f7750}.atom-counts{display:grid;grid-template-columns:repeat(3,1fr);gap:9px;margin-top:20px}.atom-counts>span{display:flex;flex-direction:column;text-align:center;gap:5px;padding:12px;background:#f1f5e9;border-radius:7px;font-size:9px;color:#99a588}.atom-counts strong{font-size:20px;color:#7a925f;font-weight:500}.experiment-bottom{display:grid;grid-template-columns:1fr 1.1fr;gap:23px;margin-top:26px}.white-card{padding:27px;background:#fffefa;border:1px solid var(--line);border-radius:12px}.white-card>h2,.experiment-notebook h2{font-size:18px;letter-spacing:-.5px}.experiment-guide>h2{margin:11px 0 26px;font-size:21px;letter-spacing:-.6px}.guide-step{display:flex;gap:15px;margin-bottom:25px}.guide-step>span{width:29px;height:29px;border-radius:50%;display:grid;place-items:center;background:#edf2e2;color:#8a9f6e;font-size:11px;flex-shrink:0}.guide-step h3{font-size:13px;margin:3px 0 8px}.guide-step p{font-size:11px;color:#8c9a7d;line-height:1.9}.lab-safety{display:flex;gap:11px;color:#95a87e;border-top:1px solid var(--line);padding-top:20px}.lab-safety p{font-size:10px;color:#97a38b;line-height:1.8}.experiment-notebook label,.profile-form label{display:block;font-size:11px;color:#81916f;margin:17px 0}.experiment-notebook textarea{display:block;width:100%;resize:vertical;min-height:65px;border:1px solid #e3e8d8;border-radius:6px;padding:12px;margin-top:8px;font-size:11px;background:#fafbf6;color:#506545;line-height:1.7}.experiment-notebook textarea::placeholder{color:#b4bba8}.saved-message{display:flex;gap:8px;align-items:center;font-size:10px;color:#7b975b;margin-top:15px}.table-toolbar{display:flex;gap:15px;align-items:center;margin-bottom:24px}.search-input{display:flex;align-items:center;gap:11px;border:1px solid #e0e6d6;border-radius:8px;padding:12px 15px;background:#fffefa;color:#99a58d}.search-input input{border:0;outline:none;min-width:0;width:100%;background:none;font-size:12px;color:#4c633e}.search-input input::placeholder{color:#a3ad96}.table-toolbar .search-input{max-width:430px;flex:1}.table-filter select{border:1px solid #e0e6d6;border-radius:8px;background:#fffefa;color:#81926b;font-size:11px;padding:12px;max-width:220px}.table-toolbar>span{font-size:10px;color:#98a48a;margin-left:auto;white-space:nowrap}.periodic-wrapper{overflow:auto;background:#fffefa;border:1px solid var(--line);border-radius:12px;padding:19px}.periodic-table{display:grid;grid-template-columns:repeat(18,minmax(39px,1fr));grid-template-rows:19px repeat(7,68px) 15px repeat(2,68px);gap:4px;min-width:880px;position:relative}.group-label{display:flex;align-items:center;justify-content:center;font-size:9px;color:#a3ae96}.element-cell{border:1px solid #0000000e;border-radius:5px;padding:4px 2px 6px;display:flex;flex-direction:column;justify-content:center;text-align:center;transition:opacity .2s,transform .2s,box-shadow .2s;overflow:hidden}.element-cell>small{text-align:left;margin-left:3px;font-size:8px;opacity:.65}.element-cell>strong{font-size:19px;font-weight:600;line-height:1.4}.element-cell>span{font-size:6px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;max-width:100%}.element-cell:hover{transform:translateY(-3px);box-shadow:0 4px 10px #324a3020;z-index:1}.element-cell.dimmed{opacity:.15}.alkali{background:#ecdbc6;color:#8b7150}.alkaline{background:#efebc9;color:#8d8550}.transition{background:#e9dfd4;color:#96806a}.metal{background:#dde6d6;color:#728467}.metalloid{background:#d7e7cd;color:#658453}.nonmetal{background:#d5e6df;color:#5c8773}.halogen{background:#d4e4e9;color:#5c8892}.noble{background:#e4ddef;color:#8b77a4}.lanthanide{background:#eee0d0;color:#aa8864}.actinide{background:#eadddc;color:#a38581}.unknown{background:#e7e8e2;color:#909585}.f-placeholder{border:1px dashed #d6ddcb;background:#f4f6ed;border-radius:5px;display:flex;align-items:center;justify-content:center;flex-direction:column;font-size:9px;color:#a1ad93}.f-placeholder small{font-size:5px;margin-top:6px}.f-label{font-size:10px;color:#a1ab94;display:flex;align-items:center;justify-content:center;padding-right:10px}.table-key{grid-column:4/12;grid-row:2/4;display:flex;flex-direction:column;gap:8px;align-items:flex-start;justify-content:center;padding-left:30px;pointer-events:none}.table-key span{font-size:8px;color:#a3ae94;letter-spacing:1px}.table-key strong{font-size:21px;font-family:var(--serif);font-weight:400;color:#879877}.element-legend{display:flex;gap:9px 16px;flex-wrap:wrap;margin:22px 0}.element-legend button{display:flex;align-items:center;gap:6px;font-size:9px;color:#8f9b80;padding:5px 0}.element-legend button.selected{font-weight:700;color:#445b32}.element-legend i{height:11px;width:11px;border-radius:3px;border:1px solid #00000009}.results-stats{grid-template-columns:repeat(3,1fr)}.results-grid{display:grid;grid-template-columns:1.1fr 1fr;gap:22px;margin:24px 0}.grade-result{display:flex;gap:15px;align-items:center;width:100%;padding:20px 0;border-bottom:1px solid #edf0e7;text-align:left}.grade-result:last-child{border:0}.grade-result>span{width:135px}.grade-result strong{font-size:12px;font-weight:550}.grade-result small{display:block;font-size:9px;color:#a0a991;margin-top:6px}.grade-result .progress-track{flex:1;height:5px}.grade-result>b{font-size:10px;color:#97a783;font-weight:500}.grade-result>svg{color:#b2bca4}.achievement{display:flex;align-items:center;gap:13px;border-bottom:1px solid #edf0e7;padding:22px 0;color:#bdc4b1}.achievement:last-child{border:0}.achievement>span{display:grid;place-items:center;width:40px;height:40px;border-radius:50%;background:#f1f3ec;color:#b4bda5;flex-shrink:0}.achievement>div{flex:1}.achievement h3{font-size:12px;font-weight:550;color:#a0aa90;margin-bottom:7px}.achievement p{font-size:9px;color:#adb69e;line-height:1.7}.achievement.earned>span{background:#e6efda;color:#7d9a58}.achievement.earned h3{color:#5b7441}.achievement.earned>svg{color:#8ca971}.empty-state{padding:45px 20px;text-align:center;color:#a0ad8f}.empty-state>svg{margin:0 auto 18px;color:#a9ba93}.empty-state h3{font-size:17px;margin-bottom:13px;color:#81956c}.empty-state h1{font-size:25px;margin-bottom:18px}.empty-state p{font-size:12px;line-height:1.9;color:#9eaa8e}.empty-state .button{margin-top:23px}.privacy-note{color:#a6af99;font-size:10px;text-align:center;line-height:1.9;margin:24px 0}.download{margin-bottom:20px}.saved-note{border-top:1px solid var(--line);padding:22px 0}.saved-note h3{font-size:15px;line-height:1.8;margin:11px 0;overflow-wrap:anywhere}.saved-note p{font-size:12px;line-height:1.9;color:#8a9a7a;overflow-wrap:anywhere}.saved-note p strong{font-weight:600}.about-hero{display:flex;align-items:center;gap:35px;background:#edf2e1;border:1px solid #dee7cf;border-radius:15px;padding:28px}.about-hero .lab-art{width:38%}.about-hero>div{flex:1}.about-hero h2{font-family:var(--serif);font-weight:400;font-size:30px;line-height:1.4;margin-bottom:17px}.about-hero p{font-size:12px;line-height:2;color:#81946d;margin-bottom:13px}.source-cards{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;margin:25px 0}.source-cards .white-card>svg{color:#9db184}.source-cards h3{font-size:14px;line-height:1.7;margin:18px 0 12px}.source-cards p{font-size:11px;color:#9ca88d;line-height:1.9}.source-cards .text-link{margin-top:22px}.source-cards>a:hover{border-color:#c8d7b4}.about-safety{display:flex;gap:23px;color:#a0b383}.about-safety h2{font-size:21px;color:#526c3e;margin-bottom:13px}.about-safety p{font-size:12px;color:#8d9d7d;line-height:2;margin-bottom:12px}footer{display:flex;align-items:center;gap:17px;border-top:1px solid #e4e8da;margin-top:35px;padding:22px 0 24px;font-size:8px;color:#acb39f}.footer-brand{display:flex;align-items:center;gap:5px;font-size:11px;font-weight:600;color:#879875}footer>a:last-child{margin-left:auto;display:flex;align-items:center;gap:6px;font-size:8px}.toast{position:fixed;z-index:80;bottom:25px;left:50%;transform:translate(-50%);display:flex;align-items:center;gap:12px;background:#2c4d38;color:#f3f8ea;border-radius:9px;padding:16px 18px;font-size:12px;box-shadow:0 8px 30px #233a2425;max-width:calc(100% - 30px)}.toast button{padding:0;color:#c2d3ad;display:flex;margin-left:5px}.dialog-backdrop{position:fixed;inset:0;background:#23332680;-webkit-backdrop-filter:blur(5px);backdrop-filter:blur(5px);z-index:60;display:flex;align-items:center;justify-content:center;padding:25px}.dialog{width:580px;max-width:100%;max-height:calc(100dvh - 50px);overflow-y:auto;background:#fffefa;border:1px solid #e1e6d5;border-radius:16px;padding:27px;box-shadow:0 20px 100px #19351b30}.dialog-heading{display:flex;align-items:center;justify-content:space-between;gap:15px;margin-bottom:25px}.dialog-heading h2{font-size:19px;letter-spacing:-.5px}.dialog>.search-input{padding:15px}.muted-copy{font-size:12px;line-height:1.9;margin:20px 0 10px;color:#a4af95}.search-results{margin-top:12px}.search-results button{display:flex;gap:12px;align-items:center;padding:15px 5px;border-bottom:1px solid var(--line);width:100%;text-align:left;font-size:12px;color:#8c9d7b}.search-results button:hover{background:#f3f6ec}.search-results button>span{flex:1;color:#5e7750}.search-results small{display:block;font-size:9px;color:#a6b096;margin-top:6px}.search-results b{width:22px;font-size:18px;font-family:var(--serif);font-weight:400;text-align:center}.profile-form input{display:block;width:100%;background:#f7f9f1;border:1px solid #e0e7d1;border-radius:7px;padding:13px;color:#567144;margin-top:10px;font-size:13px}.profile-form p{font-size:12px;color:#9ca88d;line-height:1.9;margin:17px 0 23px}.element-detail{display:flex;gap:25px;align-items:center}.detail-symbol{display:flex;flex-direction:column;align-items:center;width:140px;min-height:150px;border-radius:12px;padding:13px;border:1px solid #0001;flex-shrink:0}.detail-symbol small{align-self:flex-start;font-size:13px}.detail-symbol strong{font-family:var(--serif);font-weight:400;font-size:62px;line-height:1.15}.detail-symbol span{font-size:13px;margin-top:8px}.element-detail dl{flex:1;margin:0}.element-detail dl>div{display:flex;justify-content:space-between;gap:12px;font-size:10px;margin:14px 0}.element-detail dt{color:#9eaa8f;max-width:60%}.element-detail dd{margin:0;text-align:right;font-weight:550;color:#728a5c}.element-fact{display:flex;gap:13px;margin-top:25px;padding:19px;background:#f0f4e6;border-radius:9px;color:#8fa773;align-items:flex-start}.element-fact p{font-size:12px;color:#82986a;line-height:1.9}.element-model{display:flex;align-items:center;gap:10px;margin:15px 0}.element-model>.atom-model{width:53%;margin:0}.element-model>p{flex:1;font-size:11px;color:#9ba88c;line-height:2}.element-reminder{border-top:1px solid var(--line);padding:20px 0}.element-reminder strong{font-size:13px;font-weight:550;color:#849c6b}.element-reminder p{font-size:11px;color:#a4af95;line-height:1.9;margin-top:10px}.element-detail+.element-reminder{margin-top:20px}@keyframes float-slow{0%,to{transform:translateY(0)}50%{transform:translateY(-7px)}}.float-slow{animation:float-slow 7s ease-in-out infinite}.float-alt{animation:float-slow 6s ease-in-out -3s infinite}.bubble-rise{animation:float-slow 4s ease-in-out infinite}.electron-shell{animation:orbit 22s linear infinite}@keyframes orbit{to{transform:rotate(360deg)}}@keyframes particle-solid{to{transform:translate(1.8px,-1.8px)}}@keyframes particle-liquid{to{transform:translate(10px,-8px) rotate(30deg)}}@keyframes particle-gas{to{transform:translate(16px,-17px) rotate(75deg)}}@media(min-width:1500px){main{padding-top:44px}.hero{min-height:370px}.hero-copy{padding:37px 0 30px 42px}.hero h2{font-size:52px}.hero-copy>p{font-size:13px}.hero .button{font-size:12px}.hero-label{font-size:9px}.hero-foot{font-size:10px}.dashboard-grid{grid-template-columns:minmax(0,1fr) 280px;gap:28px}.section-heading h2{font-size:19px}.section-heading p{font-size:12px}.stat{padding:20px}.stat strong{font-size:23px}.stat>div>span{font-size:11px}.lesson-row{padding:20px 0}.lesson-row-copy strong{font-size:13px}.lesson-row-copy small{font-size:10px}.course-heading h3{font-size:18px}.course-heading .eyebrow{font-size:9px}.element-day h3,.approach-card h3{font-size:15px}.element-day>p,.approach-card>p{font-size:12px}.approach-card>div:not(.approach-symbol){font-size:11px}.lab-card-visual{height:145px}.lab-card-copy h3{font-size:15px}.lab-card-copy p{font-size:11px}.page-heading h1{font-size:29px}.page-heading p{font-size:13px}}@media(max-width:1190px){.sidebar{width:218px;padding-left:15px;padding-right:15px}.workspace{margin-left:218px}.topbar{padding:0 26px}main{padding:28px 26px 0}.hero h2{font-size:37px}.hero-copy{padding-left:25px}.hero-copy>p{font-size:10px}.hero-label{font-size:6px;letter-spacing:1.3px}.dashboard-grid{grid-template-columns:minmax(0,1fr) 210px;gap:18px}.grade-badge{font-size:8px}.stat{padding:14px 11px;gap:9px}.stat-icon{height:34px;width:34px;border-radius:9px}.stat strong{font-size:18px}.stat>div>span{font-size:8px}.stats-row{gap:12px}.page-heading h1{font-size:22px}.search-trigger kbd{margin-left:10px}.topbar-right{gap:17px}.lab-card-copy{padding:14px}.lesson-row-copy strong{font-size:9px}.lesson-content-grid{grid-template-columns:minmax(0,1fr) 250px;gap:18px}.lesson-article{padding:25px}.lesson-article p{font-size:13px}.lesson-article h2{font-size:19px}.simulation-controls{padding:28px 23px}.simulation-controls h2{font-size:21px}.element-day{padding:18px}.element-day h3{font-size:11px}}@media(max-width:1020px){.sidebar{width:195px;padding-left:12px;padding-right:12px}.workspace{margin-left:195px}.brand{font-size:22px;margin-left:6px;gap:7px}.brand-mark{width:34px;height:38px}.brand small{font-size:6px;letter-spacing:1px}.nav-item{font-size:10px;gap:9px;padding:13px 10px}.mini-new{font-size:5px;padding:3px}.sidebar-section{font-size:8px;letter-spacing:1.2px}.sidebar-note{padding:16px 12px}.sidebar-note h3{font-size:11px}.sidebar-note p{font-size:10px}.dashboard-grid{grid-template-columns:minmax(0,1fr) 195px;gap:16px}.hero-visual{width:47%;right:-9px}.hero{min-height:310px}.hero h2{font-size:34px}.hero-copy{width:60%}.hero-label{font-size:6px;letter-spacing:.8px}.hero-foot{font-size:7px;gap:10px}.art-note{font-size:6px;padding:6px 7px}.note-top{right:26px;top:34px}.note-bottom{right:23px;bottom:35px}.section-heading h2{font-size:14px}.section-heading p{font-size:9px}.section-heading>.text-link{font-size:8px;gap:4px}.grade-tabs{gap:2px}.grade-tabs button{font-size:9px;padding:7px 5px}.course-heading{padding:19px 17px 15px;gap:10px}.course-heading h3{font-size:12px}.course-heading .eyebrow{font-size:6px}.course-icon{width:36px;height:36px}.course-progress strong{font-size:12px}.course-progress>span{font-size:7px}.course-panel>.progress-track{margin-left:17px;margin-right:17px}.lesson-list{padding:0 17px}.lesson-row{gap:9px}.lesson-row-copy strong{font-size:8px}.lesson-row-copy small{font-size:7px}.lesson-index{width:26px;height:26px;font-size:9px}.lesson-action{width:23px;height:23px}.element-day h3{font-size:11px}.element-day>p{font-size:9px}.approach-card{padding:18px}.approach-card h3{font-size:11px}.approach-card>p{font-size:8px}.approach-card>div:not(.approach-symbol){font-size:8px;gap:5px}.approach-card>.text-link{font-size:7px;gap:5px}.card-top .eyebrow{font-size:6px}.lab-card-copy h3{font-size:10px}.lab-card-copy p{font-size:8px}.lab-card-copy>span{font-size:8px}.grade-badge{display:none}.lesson-content-grid{grid-template-columns:1fr}.lesson-content-grid>aside{display:grid;grid-template-columns:1fr 1fr;align-items:center}.lesson-model{display:flex;align-items:center;flex-direction:column}.lesson-model>.atom-model{height:180px}.lesson-model>.particle-vessel{transform:scale(.7);margin:-18px auto}.lesson-model>.beaker{height:180px}.learning-tip{padding:25px}.simulation{grid-template-columns:1fr 1fr}.simulation-stage{padding:60px 12px 25px;min-height:470px}.particle-vessel{width:210px;height:235px}.simulation-controls{padding:28px 20px}.simulation-controls h2{font-size:18px}.simulation-controls>p{font-size:11px}.experiment-bottom{gap:15px}.white-card{padding:22px}.experiment-guide>h2{font-size:18px}.results-grid{grid-template-columns:1fr}.source-cards{gap:12px}.source-cards .white-card{padding:18px}.source-cards h3{font-size:12px}.source-cards p{font-size:10px}.source-cards .text-link{font-size:8px}.about-hero{gap:15px;padding:22px}.about-hero h2{font-size:24px}.about-hero p{font-size:11px}.curriculum-card{padding:22px;gap:18px}.curriculum-card h2{font-size:15px}.lesson-meta{gap:10px;font-size:8px}.curriculum-card .button{padding:10px 12px;font-size:10px}.page-intro h1{font-size:27px}.page-intro p{font-size:12px}}@media(max-width:800px){.sidebar{width:215px;transform:translate(-100%);transition:transform .25s}.sidebar.is-open{transform:translate(0)}.sidebar-backdrop{position:fixed;inset:0;background:#223a3060;z-index:29}.workspace{margin-left:0}.mobile-menu{display:grid}.topbar{height:73px;padding:0 22px}.topbar-left{gap:13px}.topbar-right{gap:14px}.breadcrumb{font-size:9px}.profile-trigger>span:nth-child(2){font-size:9px}.search-trigger kbd,.header-divider{display:none}main{padding:27px 23px 0}.page-heading h1{font-size:23px}.page-heading p{font-size:11px}.hero h2{font-size:42px}.hero-copy{padding:30px 0 26px 30px}.hero-copy>p{font-size:11px}.hero{min-height:334px}.hero-label{font-size:7px;letter-spacing:1px}.hero-foot{font-size:8px}.hero-visual{width:45%;right:0}.dashboard-grid{grid-template-columns:minmax(0,1fr) 210px;gap:20px}.lesson-row-copy strong{font-size:10px}.lesson-row-copy small{font-size:8px}.section-heading h2{font-size:15px}.element-day h3{font-size:12px}.element-day>p{font-size:10px}.grade-tabs button{font-size:10px}.course-heading h3{font-size:14px}.course-heading .eyebrow{font-size:7px}.course-icon{height:39px;width:39px}.course-progress strong{font-size:13px}.lab-card-copy h3{font-size:11px}.lab-card-copy p{font-size:9px}.sidebar .nav-item{font-size:11px}.sidebar .brand{font-size:25px}.sidebar-note p{font-size:11px}.sidebar-note h3{font-size:12px}.sidebar-bottom>div{font-size:8px}.simulation-stage{min-height:440px}.simulation-controls h2{font-size:21px}}@media(max-width:650px){.topbar{padding:0 17px;height:67px}.breadcrumb{font-size:8px;gap:7px}.breadcrumb>strong{max-width:85px;text-overflow:ellipsis;overflow:hidden;white-space:nowrap}.topbar-left{gap:7px}.profile-trigger>span:nth-child(2),.profile-trigger>svg{display:none}.avatar{height:33px;width:33px}.search-trigger>span{display:none}.topbar-right{gap:15px}main{padding:24px 17px 0}.page-heading{margin-bottom:22px}.page-heading .eyebrow{font-size:6px;letter-spacing:1.15px}.page-heading h1{font-size:22px;margin:7px 0}.page-heading p{font-size:10px}.wave{font-size:26px}.hero{min-height:465px}.hero-copy{padding:26px 22px 23px;width:100%}.hero-label{font-size:6px;letter-spacing:1.3px}.hero h2{font-size:40px;margin:18px 0 13px}.hero-copy>p{font-size:10px;position:relative;z-index:1;max-width:250px}.hero .button{margin-top:18px}.hero-foot{position:absolute;bottom:-165px;left:22px;gap:20px;font-size:7px}.hero-visual{width:220px;height:208px;right:-3px;bottom:12px;top:auto}.note-top,.note-bottom{display:none}.hero-visual .lab-art{height:210px}.stats-row{grid-template-columns:1fr 1fr;gap:11px;margin:17px 0 27px}.stat{padding:15px 13px;gap:10px}.stat-icon{width:36px;height:36px}.stat strong{font-size:20px}.stat>div>span{font-size:9px}.dashboard-grid{display:flex;flex-direction:column;gap:25px}.section-heading h2{font-size:16px}.section-heading p{font-size:9px}.section-heading>.text-link{font-size:8px}.grade-tabs{padding:4px;gap:3px}.grade-tabs button{font-size:10px;padding:9px 6px}.course-heading{padding:22px;gap:13px}.course-icon{height:43px;width:43px}.course-heading h3{font-size:16px}.course-heading .eyebrow{font-size:8px}.course-panel>.progress-track{margin-left:22px;margin-right:22px}.lesson-list{padding:0 22px}.lesson-row{gap:12px;padding:18px 0}.lesson-row-copy strong{font-size:11px}.lesson-row-copy small{font-size:9px}.lesson-index{width:31px;height:31px;font-size:10px}.lesson-action{width:26px;height:26px}.course-all{padding:15px;font-size:10px}.lab-cards{gap:12px}.lab-card-copy{padding:13px}.lab-card-copy h3{font-size:11px}.lab-card-copy p{font-size:9px;line-height:1.8;min-height:32px}.lab-card-copy>span{font-size:9px}.lab-card-visual{height:115px}.dashboard-aside{display:grid;grid-template-columns:1fr 1fr;gap:12px;align-items:stretch}.element-day{padding:17px 15px}.approach-card{margin:0;padding:17px 15px}.element-day h3{font-size:11px}.element-day>p{font-size:9px}.element-day>.text-link{font-size:8px;gap:5px}.approach-card h3{font-size:11px;margin-top:16px}.approach-card>p{font-size:9px}.approach-card>div:not(.approach-symbol){font-size:8px;gap:6px}.approach-card>.text-link{font-size:7px;gap:3px;white-space:normal;line-height:1.8}.featured-element{width:85px;min-height:102px;margin:20px auto 17px}.featured-element>strong{font-size:45px}.featured-element>span:not(.element-number){font-size:9px}.featured-element>small{font-size:7px}.approach-symbol{height:39px;width:39px;margin-top:9px}.page-intro{margin:3px 0 24px}.page-intro .eyebrow{font-size:7px}.page-intro h1{font-size:26px;line-height:1.4;margin:11px 0}.page-intro p{font-size:12px;line-height:1.9}.grade-tabs.big button{font-size:11px;padding:8px 6px}.curriculum-banner{padding:20px;gap:15px}.curriculum-banner>svg{width:26px}.curriculum-banner h2{font-size:18px}.curriculum-banner p{font-size:10px;line-height:1.6}.curriculum-banner>span{font-size:9px;white-space:nowrap}.curriculum-card{padding:20px 17px;gap:13px;flex-wrap:wrap;align-items:flex-start}.step-number{height:41px;width:41px;font-size:21px;border-radius:9px}.curriculum-card>div:nth-child(2){flex:1;min-width:210px}.curriculum-card h2{font-size:15px;line-height:1.5}.curriculum-card p{font-size:11px}.curriculum-card .eyebrow{font-size:7px}.curriculum-card .button{margin:0 0 0 54px;min-height:36px;font-size:10px}.lesson-meta{font-size:8px;flex-wrap:wrap}.notice{padding:16px;font-size:10px;align-items:flex-start}.lesson-content-grid>aside{grid-template-columns:1fr}.learning-tip{padding:20px 8px}.lesson-model>.atom-model{height:200px}.lesson-model>.particle-vessel{margin:-8px auto}.lesson-model>.beaker{height:200px}.lesson-model{padding:22px}.lesson-article{padding:23px 20px}.lesson-article p{font-size:13px}.lesson-article h2{font-size:20px}.lesson-article section:last-child{margin:0}.concept-box{padding:17px}.concept-box strong{font-size:17px}.quiz-panel{padding:23px 19px;margin-top:8px}.quiz-panel .section-heading h2{font-size:20px}.quiz-panel .section-heading .soft-label{font-size:6px}.question legend{font-size:13px;align-items:flex-start}.answer{font-size:12px;line-height:1.7;padding:12px}.quiz-result{flex-direction:column;align-items:flex-start;padding:19px}.quiz-result strong{font-size:14px}.quiz-result .button{width:100%}.lab-tabs{gap:4px;padding:4px}.lab-tabs button{font-size:8px;padding:10px 5px;gap:5px;flex-direction:column;line-height:1.6}.lab-tabs button svg{width:18px}.simulation{grid-template-columns:1fr}.simulation-stage{min-height:370px;padding-top:49px}.simulation-stage .atom-model{height:260px}.simulation-stage .beaker{height:245px}.simulation-stage .particle-vessel{height:220px;width:220px;margin-top:20px}.model-caption strong{font-size:23px}.model-caption>span{font-size:10px}.simulation-controls{padding:28px 22px}.simulation-controls h2{font-size:24px}.simulation-controls>p{font-size:12px}.range-label{font-size:12px}.model-disclaimer{font-size:10px}.experiment-bottom{grid-template-columns:1fr;gap:18px}.white-card{padding:23px 20px}.experiment-guide>h2{font-size:21px}.guide-step h3{font-size:14px}.guide-step p,.experiment-notebook label,.experiment-notebook textarea{font-size:12px}.table-toolbar{flex-wrap:wrap;gap:10px}.table-toolbar .search-input{flex-basis:100%;max-width:none}.table-filter select{font-size:10px;max-width:230px}.periodic-wrapper{margin:0 -7px;padding:13px;border-radius:9px}.periodic-table{min-width:890px}.table-key strong{font-size:22px}.element-legend{gap:4px 12px}.element-legend button{font-size:8px}.results-stats{grid-template-columns:repeat(3,1fr);gap:8px}.results-stats .stat{flex-direction:column;align-items:flex-start;padding:13px;gap:8px}.results-stats .stat strong{font-size:24px}.results-stats .stat>div>span{font-size:8px;line-height:1.7}.results-grid{gap:17px}.grade-result>span{width:123px}.achievement{padding:20px 0}.achievement h3{font-size:12px}.achievement p{font-size:9px}.notebook .section-heading h2{font-size:17px}.notebook .section-heading>.text-link{font-size:9px}.empty-state{padding:30px 5px}.empty-state h3{font-size:17px;line-height:1.7}.empty-state p{font-size:11px}.about-hero{flex-direction:column;gap:10px;padding:23px}.about-hero .lab-art{width:100%;height:210px}.about-hero h2{font-size:27px}.about-hero p{font-size:12px}.source-cards{grid-template-columns:1fr;gap:14px}.source-cards .white-card{padding:23px}.source-cards h3{font-size:16px}.source-cards p{font-size:12px}.source-cards .text-link{font-size:10px}.about-safety{gap:13px;padding:23px 20px}.about-safety>svg{width:23px}.about-safety h2{font-size:19px;line-height:1.7}.about-safety p{font-size:11px}footer{flex-wrap:wrap;gap:10px;font-size:7px;margin-top:28px}.footer-brand{font-size:10px}footer>a:last-child{font-size:7px}.dialog-backdrop{padding:13px}.dialog{padding:22px 19px;border-radius:12px;max-height:calc(100dvh - 26px)}.dialog-heading{margin-bottom:21px}.dialog-heading h2{font-size:17px;line-height:1.6}.element-detail{gap:17px}.detail-symbol{width:105px;min-height:135px}.detail-symbol strong{font-size:52px}.detail-symbol span{font-size:11px}.element-detail dl>div{font-size:9px;gap:9px;margin:13px 0}.element-detail dt{max-width:58%}.element-fact{padding:15px;gap:10px}.element-fact p{font-size:11px}.element-model>p{font-size:10px}.element-model>.atom-model{width:50%}.toast{font-size:11px;bottom:17px;padding:13px;gap:9px;width:max-content}.dialog-heading .icon-button{width:30px;flex-shrink:0}}.lesson-article p{font-size:16px;line-height:2}.answer{font-size:14px}.answer-explanation{font-size:13px}.simulation-controls>p{font-size:14px}.insight p,.guide-step p,.experiment-notebook label{font-size:12px}.experiment-notebook textarea,.saved-note p{font-size:13px}@media(max-width:650px){.hero-foot{bottom:18px;left:22px}.lesson-article p{font-size:15px}.answer{font-size:13px}.simulation-controls>p{font-size:13px}}@media(prefers-reduced-motion:reduce){*,*:before,*:after{animation:none!important;transition:none!important;scroll-behavior:auto!important}}.expanded-lab-tabs{max-width:none}.expanded-lab-tabs button{font-size:10px;gap:7px;padding:11px 8px}.advanced-lab,.molecule-explorer{animation:lab-appear .3s ease-out}.workbench-intro{display:flex;justify-content:space-between;align-items:center;gap:20px;margin:30px 0 23px}.workbench-intro h2{font-family:var(--serif);font-size:32px;font-weight:400;letter-spacing:-1px;margin:10px 0}.workbench-intro p{color:#94a086;font-size:12px;line-height:1.8}.experiment-badge{border:1px solid #dfe8d4;border-radius:25px;padding:9px 12px;display:flex;align-items:center;gap:7px;font-size:10px;color:#87a06b;white-space:nowrap;background:#f2f6e9}.workbench-layout{display:grid;grid-template-columns:minmax(0,1.6fr) minmax(285px,1fr);border:1px solid #dce5d2;border-radius:15px;overflow:hidden;background:#fffefa}.bench-viewport{position:relative;min-height:605px;background:#e5ece4;isolation:isolate;overflow:hidden}.bench-viewport:fullscreen{height:100dvh;width:100vw}.bench-canvas,.molecule-canvas{position:absolute;inset:0;overflow:hidden}.bench-canvas canvas{display:block;width:100%;height:100%}.bench-overlay-top{position:absolute;top:19px;left:20px;right:20px;display:flex;align-items:center;justify-content:space-between;gap:12px;pointer-events:none;z-index:2}.lab-live{display:flex;align-items:center;gap:6px;border:1px solid #cbdac8;background:#f7faedbd;padding:7px 9px;border-radius:5px;letter-spacing:1px;font-size:7px;color:#6f8b64;font-weight:600;-webkit-backdrop-filter:blur(5px);backdrop-filter:blur(5px)}.lab-live i{height:5px;width:5px;border-radius:50%;background:#89ab6f}.bench-overlay-top>span:last-child{font-size:8px;color:#8ca07d}.bench-tools{position:absolute;top:65px;right:17px;display:flex;flex-direction:column;gap:6px;z-index:2}.bench-tools button{height:33px;width:33px;border:1px solid #cedbca;border-radius:7px;background:#fafff1cd;display:grid;place-items:center;color:#819872;box-shadow:0 2px 4px #273e2010}.bench-tools button:hover{background:#fffefa;color:#527240}.bench-equipment-note{display:flex;align-items:center;gap:7px;position:absolute;left:20px;bottom:115px;right:20px;justify-content:center;color:#76916a;font-size:8px;pointer-events:none}.bench-selected{display:flex;align-items:flex-start;gap:10px;position:absolute;bottom:18px;left:18px;right:18px;border:1px solid #c9d8c3;background:#fafff1df;padding:15px 16px;border-radius:10px;box-shadow:0 4px 15px #3b52230a;-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);pointer-events:none;min-height:78px}.bench-selected-dot{width:8px;height:8px;border-radius:50%;background:#b1c68a;margin-top:4px;flex-shrink:0}.bench-selected strong{font-size:11px;font-weight:600;color:#547040}.bench-selected p{font-size:10px;line-height:1.8;color:#8c9c7a;margin-top:5px}.bench-panel{padding:23px 23px 21px}.bench-panel-heading{display:flex;align-items:center;justify-content:space-between;gap:15px}.bench-panel-heading h3{font-size:21px;letter-spacing:-.6px;margin-top:8px}.bench-panel-heading .eyebrow{font-size:7px}.reaction-equation{margin:19px 0;padding:13px 10px;background:#f1f5e9;border:1px solid #e2e9d7;border-radius:7px;display:flex;align-items:center;justify-content:center;gap:7px;font-family:var(--serif);font-size:15px;white-space:nowrap;color:#71895a}.reaction-equation>span{color:#a9b99a}.sample-spec{display:flex;justify-content:space-between;gap:10px;padding-bottom:20px;border-bottom:1px solid #e8eddf}.sample-spec>span{font-size:8px;color:#a6b096}.sample-spec strong{display:block;font-weight:550;font-size:11px;color:#7d9269;margin-top:7px}.experiment-step{display:flex;gap:9px;align-items:flex-start;margin:20px 0 12px}.experiment-step>span{width:22px;height:22px;display:grid;place-items:center;flex-shrink:0;border:1px solid #e0e8d5;border-radius:50%;font-size:9px;color:#95a97f;background:#f5f8ee}.experiment-step strong{font-size:10px;font-weight:600;color:#788f64}.experiment-step small{display:block;font-size:8px;color:#a7b298;line-height:1.9;margin-top:4px}.experiment-step.step-complete>span{background:#e2edcf;color:#769552}.indicator-button{display:flex;gap:9px;align-items:center;width:100%;border:1px solid #dfe7d3;background:#f6f9ef;border-radius:7px;padding:12px;font-size:10px;color:#829969;transition:.2s}.indicator-button>i{height:13px;width:13px;border-radius:50%;margin-left:auto;border:2px solid #fffefa;box-shadow:0 0 0 1px #c6d3b6}.indicator-button.added{background:#eff5e5;opacity:1;color:#9bb17e}.dose-controls{display:grid;grid-template-columns:repeat(3,1fr);gap:7px}.dose-controls button{display:flex;justify-content:center;align-items:center;gap:4px;border:1px solid #dae5ca;background:#edf3e1;padding:11px 7px;color:#749254;font-size:11px;border-radius:6px;font-weight:600}.dose-controls button:not(:disabled):hover{background:#dfeacb}.dose-controls button:disabled{background:#f5f6f0;opacity:.5}.step-hint{font-size:8px;margin-top:7px;color:#adb6a0}.live-readings{display:grid;grid-template-columns:1.2fr 1fr;gap:8px;margin:18px 0 12px}.live-readings>div{background:#f6f8f0;border:1px solid #e6ecdc;border-radius:8px;padding:12px}.live-readings small{font-size:6px;font-weight:600;letter-spacing:1px;color:#a4b094;display:block}.live-readings strong{display:block;font-size:29px;letter-spacing:-.8px;font-weight:500;color:#719356;margin-top:9px;font-variant-numeric:tabular-nums}.live-readings strong>span{font-size:10px;color:#a4b293;letter-spacing:0;margin-left:5px}.equivalence-status{display:flex;gap:8px;align-items:flex-start;font-size:9px;line-height:1.8;color:#a1af92;min-height:39px}.equivalence-status>svg{color:#a2b78c;margin-top:1px}.equivalence-status.at-equivalence{color:#729456;background:#f0f7e4;padding:10px;border-radius:6px}.measure-button{width:100%;font-size:10px;padding:12px 10px;gap:8px}.measure-dot{width:15px;height:15px;border:1.5px solid currentColor;border-radius:50%;display:grid;place-items:center}.measure-dot i{height:5px;width:5px;background:currentColor;border-radius:50%}.equipment-strip{display:grid;grid-template-columns:repeat(4,1fr);gap:10px;margin:14px 0 25px}.equipment-strip button{display:flex;gap:9px;align-items:center;padding:13px 11px;border:1px solid #e1e8d5;background:#fffefa;border-radius:8px;color:#95a683;font-size:9px;text-align:left}.equipment-strip button>span{font-size:8px;color:#b1bba3}.equipment-strip button>svg{margin-left:auto}.equipment-strip button.selected{background:#edf3e2;border-color:#d2e0bb;color:#738e53}.experiment-analysis{display:grid;grid-template-columns:1.1fr 1fr;gap:23px}.experiment-analysis .section-heading h3{font-size:18px;letter-spacing:-.5px;margin-top:8px}.titration-chart>svg{display:block;width:100%;margin-top:23px}.chart-hint{font-size:11px;color:#a3b18f;line-height:1.9;margin:15px 0 3px}.reading-table-wrap{max-height:210px;overflow:auto;margin-top:15px}.reading-table{width:100%;border-collapse:collapse;text-align:left;font-size:10px;font-variant-numeric:tabular-nums}.reading-table th{font-size:8px;color:#a9b69a;font-weight:500;letter-spacing:.4px;padding:10px 7px;border-bottom:1px solid #e6ecdc}.reading-table td{padding:10px 7px;border-bottom:1px solid #f0f3e9;color:#91a47b}.advanced-notebook>.section-heading{color:#a9bb91}.advanced-notebook>p{font-size:11px;color:#a0af8d;line-height:1.9;margin:10px 0 15px}.advanced-notebook form label{display:block;font-size:11px;color:#91a27d;margin:17px 0}.advanced-notebook textarea{width:100%;display:block;margin-top:9px;border:1px solid #e1e8d4;border-radius:7px;background:#f9fbf3;color:#6c8652;padding:12px;resize:vertical;min-height:76px;font-size:12px;line-height:1.8}.advanced-notebook textarea::placeholder{color:#b3bda3}.advanced-notebook form>small{display:block;font-size:9px;line-height:1.8;color:#b0b99e;margin-top:12px}.lab-model-notes{display:grid;grid-template-columns:1.5fr 1fr;gap:30px;border-top:1px solid #e0e7d4;margin-top:27px;padding:23px 4px}.lab-model-notes>div{display:flex;gap:11px;color:#9bb486;align-items:flex-start}.lab-model-notes p{font-size:10px;color:#a4b395;line-height:2}.lab-model-notes strong{font-weight:600;color:#92a77d}.engine-credit{text-align:center;font-size:9px;line-height:1.9;color:#abb69d;margin:10px 0 15px}.engine-credit a{color:#90a478;text-decoration:underline;text-underline-offset:3px}.engine-credit a:hover{color:#5a793f}.viewport-loading{position:absolute;inset:0;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:15px;color:#8eaa78;background:#e7eee1;z-index:1;font-size:12px}.viewport-loading>svg{animation:lab-pulse 2s ease-in-out infinite}.webgl-fallback{position:absolute;inset:0;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:12px;background:#e9efe2;padding:45px 45px 95px;text-align:center}.webgl-fallback>.beaker{height:230px;margin:0}.webgl-fallback strong{font-size:19px;color:#859f6d}.webgl-fallback p{font-size:11px;line-height:1.9;color:#9eaf8c;max-width:300px}.molecule-layout{display:grid;grid-template-columns:minmax(0,1.6fr) minmax(285px,1fr);border:1px solid #dfe7d3;border-radius:15px;overflow:hidden;background:#fffefa}.molecule-stage{position:relative;min-height:565px;background:#edf1e6;overflow:hidden}.molecule-canvas>canvas{position:absolute;inset:0}.molecule-formula{position:absolute;left:23px;bottom:60px;pointer-events:none}.molecule-formula strong{display:block;font-family:var(--serif);font-size:43px;font-weight:400;color:#93a482;letter-spacing:-1px}.molecule-formula span{font-size:10px;color:#a4b397;display:block;margin-top:6px}.molecule-footer{position:absolute;bottom:20px;left:22px;right:22px;display:flex;gap:8px;align-items:center;font-size:9px;color:#a0b18e;pointer-events:none}.molecule-panel{padding:27px 25px}.molecule-panel>h3{font-size:21px;letter-spacing:-.5px;margin:12px 0 20px}.molecule-picker{display:grid;grid-template-columns:repeat(3,1fr);gap:7px}.molecule-picker button{display:flex;flex-direction:column;align-items:center;gap:7px;padding:13px 5px;border:1px solid #e3e9d8;border-radius:7px;background:#f8faf3;transition:.2s}.molecule-picker button>strong{font-size:20px;font-family:var(--serif);font-weight:400;color:#9aab87}.molecule-picker button>span{font-size:7px;color:#adb99b}.molecule-picker button.selected{background:#eaf2db;border-color:#ccddb3}.molecule-picker button.selected>strong{color:#72944e}.molecule-picker button.selected>span{color:#93aa76}.molecule-panel>h4{font-size:10px;color:#95a67f;margin:23px 0 11px;font-weight:500}.molecule-style-picker{display:flex;gap:4px;background:#f1f5e9;border-radius:6px;padding:4px}.molecule-style-picker button{flex:1;border-radius:4px;padding:9px 4px;font-size:8px;color:#a4b191;white-space:nowrap}.molecule-style-picker button.selected{background:#fffefa;color:#819c64;box-shadow:0 1px 4px #385b190a}.atom-label-toggle{display:flex;gap:9px;align-items:center;font-size:10px;color:#9fae8c;margin:15px 0}.atom-label-toggle input{accent-color:#8ba86b;width:13px;height:13px}.molecule-properties{display:flex;flex-direction:column;gap:16px;border-top:1px solid #e9eedf;border-bottom:1px solid #e9eedf;padding:19px 0;margin:22px 0 18px}.molecule-properties>span{display:flex;justify-content:space-between;gap:12px;align-items:center}.molecule-properties small{font-size:6px;letter-spacing:1px;color:#b1bda1}.molecule-properties strong{font-size:11px;font-weight:500;color:#8b9f75;max-width:60%;text-align:right}.molecule-description{display:flex;gap:10px;color:#a2b98b;align-items:flex-start}.molecule-description p{font-size:11px;color:#9bab88;line-height:2}.molecule-details-strip{display:flex;align-items:center;justify-content:space-between;gap:20px;padding:21px 3px;font-size:9px;color:#aab89a}.atom-color-key{display:flex;flex-wrap:wrap;gap:15px;font-size:8px}.atom-color-key>span{display:flex;gap:5px;align-items:center}.atom-color-key i{width:9px;height:9px;border-radius:50%}.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}@keyframes lab-appear{0%{opacity:0;transform:translateY(5px)}to{opacity:1;transform:translateY(0)}}@keyframes lab-pulse{50%{opacity:.35;transform:translateY(-4px)}}@media(min-width:1500px){.bench-viewport{min-height:640px}.bench-panel{padding:30px}.bench-panel-heading h3{font-size:25px}.sample-spec>span{font-size:10px}.sample-spec strong{font-size:13px}.experiment-step strong{font-size:12px}.experiment-step small{font-size:10px}.indicator-button,.measure-button{font-size:12px}.reaction-equation{font-size:18px}.live-readings small{font-size:8px}.live-readings strong{font-size:33px}.equipment-strip button,.equivalence-status{font-size:11px}.bench-selected p{font-size:12px}.bench-selected strong{font-size:13px}.bench-equipment-note{font-size:10px}.molecule-panel{padding:32px}.molecule-description p{font-size:13px}.molecule-picker button>span{font-size:9px}.molecule-properties strong{font-size:13px}.molecule-style-picker button{font-size:10px}}@media(max-width:1190px){.workbench-layout,.molecule-layout{grid-template-columns:minmax(0,1fr) 290px}.bench-panel{padding:21px 18px}.bench-viewport{min-height:615px}.bench-selected{padding:12px}.bench-selected p{font-size:9px}.bench-overlay-top{left:14px;right:14px}.bench-overlay-top>span:last-child{font-size:7px}.lab-live{font-size:6px;padding:6px 7px}.bench-equipment-note{font-size:7px;bottom:115px}.molecule-panel{padding:23px 19px}.expanded-lab-tabs{flex-wrap:wrap;justify-content:flex-start}.expanded-lab-tabs button{flex:1 1 140px;font-size:10px}.equipment-strip button{font-size:8px;gap:7px;padding:12px 10px}.workbench-intro h2{font-size:29px}.experiment-analysis{gap:17px}.molecule-details-strip{align-items:flex-start;flex-direction:column;gap:13px}}@media(max-width:1020px){.workbench-layout,.molecule-layout{grid-template-columns:1fr}.bench-viewport{min-height:455px}.bench-panel{padding:26px;display:grid;grid-template-columns:1fr 1fr;column-gap:23px}.bench-panel-heading,.reaction-equation,.live-readings,.equivalence-status,.measure-button{grid-column:1/-1}.bench-panel-heading{grid-row:1}.reaction-equation{grid-row:2}.sample-spec{grid-row:3;grid-column:1/-1}.experiment-step.step-complete,.bench-panel>.experiment-step:nth-of-type(3){grid-column:1}.bench-panel>.experiment-step{grid-column:1/-1;margin:20px 0 11px}.indicator-button,.dose-controls,.step-hint{grid-column:1/-1}.bench-selected p{font-size:11px}.bench-selected strong{font-size:12px}.bench-equipment-note{font-size:9px;bottom:113px}.lab-live{font-size:7px}.bench-overlay-top>span:last-child{font-size:9px}.experiment-step strong{font-size:12px}.experiment-step small{font-size:10px}.indicator-button,.measure-button{font-size:12px}.sample-spec>span{font-size:10px}.sample-spec strong{font-size:13px}.live-readings small{font-size:8px}.equivalence-status{font-size:11px}.equipment-strip{grid-template-columns:1fr 1fr}.equipment-strip button{font-size:11px}.molecule-stage{min-height:450px}.molecule-picker{grid-template-columns:repeat(6,1fr)}.molecule-picker button>span{font-size:7px}.molecule-panel{padding:27px}.molecule-properties{flex-direction:row;justify-content:space-between;gap:23px}.molecule-properties>span{flex:1}.molecule-description p{font-size:13px}.molecule-style-picker button{font-size:10px}.atom-label-toggle{font-size:12px}.lab-model-notes{grid-template-columns:1fr;gap:15px}.molecule-details-strip{flex-direction:row;flex-wrap:wrap}.experiment-analysis{grid-template-columns:1fr 1fr}.titration-chart .section-heading{align-items:flex-start}.titration-chart .section-heading h3,.advanced-notebook .section-heading h3{font-size:16px}.advanced-notebook>.section-heading .eyebrow,.titration-chart .section-heading .eyebrow{font-size:6px}}@media(max-width:650px){.expanded-lab-tabs{gap:4px;padding:5px;justify-content:center}.expanded-lab-tabs button{flex:1 1 29%;font-size:8px;padding:9px 5px;gap:5px}.expanded-lab-tabs button:nth-child(-n+2){flex-basis:45%;flex-direction:row;font-size:10px;padding:12px 7px}.workbench-intro{margin:25px 0 19px;align-items:flex-start}.workbench-intro .eyebrow{font-size:6px;letter-spacing:1px}.workbench-intro h2{font-size:29px;line-height:1.25;margin:10px 0 12px}.workbench-intro p{font-size:11px;max-width:310px}.experiment-badge{display:none}.bench-viewport{min-height:435px}.bench-overlay-top{top:15px;left:12px;right:12px}.lab-live{font-size:6px;padding:6px}.bench-overlay-top>span:last-child{font-size:7px}.bench-tools{top:54px;right:11px;gap:5px}.bench-tools button{height:31px;width:31px}.bench-equipment-note{bottom:110px;font-size:7px;left:13px;right:13px;gap:5px}.bench-equipment-note>svg{width:13px}.bench-selected{left:11px;right:11px;bottom:12px;padding:12px;min-height:79px;gap:9px}.bench-selected p{font-size:9px;line-height:1.8}.bench-selected strong{font-size:11px}.bench-panel{display:block;padding:23px 19px}.bench-panel-heading h3{font-size:23px}.bench-panel-heading .eyebrow{font-size:7px}.reaction-equation{font-size:17px;gap:8px;padding:15px 9px}.sample-spec{padding-bottom:21px}.sample-spec>span{font-size:9px}.sample-spec strong{font-size:13px}.experiment-step{margin-top:22px}.experiment-step strong{font-size:12px}.experiment-step small{font-size:9px}.indicator-button{font-size:11px;padding:13px}.dose-controls button{padding:13px 8px;font-size:13px}.live-readings{margin:21px 0 15px;gap:10px}.live-readings>div{padding:15px}.live-readings small{font-size:7px}.live-readings strong{font-size:32px}.live-readings strong>span{font-size:11px}.equivalence-status{font-size:10px}.measure-button{font-size:11px;padding:14px 10px}.equipment-strip{gap:8px;margin-top:12px}.equipment-strip button{font-size:9px;padding:13px 10px}.equipment-strip button>span{font-size:7px}.experiment-analysis{grid-template-columns:1fr;gap:17px}.experiment-analysis .section-heading h3{font-size:20px}.advanced-notebook>.section-heading .eyebrow,.titration-chart .section-heading .eyebrow{font-size:7px}.titration-chart>svg{margin-top:15px}.reading-table{font-size:11px}.reading-table th{font-size:9px}.advanced-notebook>p{font-size:12px}.advanced-notebook form label{font-size:12px}.advanced-notebook textarea{font-size:13px;min-height:90px}.lab-model-notes{padding:20px 1px;margin-top:24px;gap:18px}.lab-model-notes p{font-size:10px}.engine-credit{font-size:8px;line-height:2;overflow-wrap:anywhere}.molecule-stage{min-height:425px}.molecule-formula{bottom:60px;left:20px}.molecule-formula strong{font-size:39px}.molecule-footer{font-size:8px;left:17px;right:17px;bottom:20px;align-items:flex-start;line-height:1.8}.molecule-footer>svg{width:14px;margin-top:2px}.molecule-panel{padding:25px 19px}.molecule-panel>h3{font-size:23px}.molecule-picker{grid-template-columns:repeat(3,1fr);gap:8px}.molecule-picker button{padding:16px 5px}.molecule-picker button>strong{font-size:25px}.molecule-picker button>span{font-size:8px}.molecule-panel>h4{font-size:11px}.molecule-style-picker button{font-size:9px;padding:11px 5px}.atom-label-toggle{font-size:11px;margin:20px 0}.molecule-properties{flex-direction:column;gap:16px}.molecule-properties small{font-size:8px}.molecule-properties strong{font-size:13px}.molecule-description p{font-size:12px}.molecule-details-strip{padding:20px 3px;font-size:9px;gap:18px;line-height:1.8}.atom-color-key{gap:10px 13px;font-size:8px}.webgl-fallback{padding:65px 25px 105px}.webgl-fallback>.beaker{height:180px}.webgl-fallback strong{font-size:17px}.webgl-fallback p{font-size:10px}.viewport-loading{font-size:11px}}.molecule-canvas iframe{display:block;width:100%;height:100%;border:0;background:#edf1e6}.theory-toggle{display:flex;align-items:center;gap:7px;font-size:10px;line-height:1.8;color:#9aac86;margin:8px 0 12px}.theory-toggle input{accent-color:#8ba76c}.chart-interpolation-note{font-size:9px;line-height:1.8;color:#aab89a;margin:8px 0}.skip-link:not(:focus){clip-path:inset(50%);width:1px;height:1px;overflow:hidden;white-space:nowrap;padding:0}@media(prefers-reduced-motion:reduce){.advanced-lab,.molecule-explorer,.viewport-loading>svg{animation:none}}.molecule-search{padding:10px 12px}.molecule-search input{font-size:11px}.molecule-catalog-filter{display:flex;align-items:center;justify-content:space-between;gap:10px;margin:12px 0;color:#9aab87;font-size:9px}.molecule-catalog-filter select{border:1px solid #dfe7d2;border-radius:5px;padding:7px 8px;font-size:10px;color:#8ba174;background:#f8faf3;max-width:85%}.expanded-molecule-picker{max-height:235px;overflow:auto;overscroll-behavior:contain;padding:2px 4px 3px 2px;scrollbar-width:thin;scrollbar-color:#c6d6b5 transparent;grid-template-columns:repeat(3,minmax(0,1fr))}.expanded-molecule-picker button>strong{font-size:20px}.expanded-molecule-picker button>span{max-width:100%;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;font-size:7px}.molecule-stage{min-height:650px}.atomic-explorer-layout{display:grid;grid-template-columns:minmax(0,1.45fr) minmax(300px,1fr);gap:22px}.atom-3d-viewer{background:#fffefa;border:1px solid #e0e7d6;border-radius:13px;overflow:hidden}.atom-3d-stage{position:relative;min-height:380px;background:#edf1e6;overflow:hidden}.atom-3d-canvas{position:absolute;inset:0}.atom-3d-canvas canvas{display:block;width:100%;height:100%;touch-action:none}.shell-distribution{display:flex;justify-content:center;gap:6px;padding:18px 15px;background:#f8faf3;flex-wrap:wrap;border-top:1px solid #e6ebdd}.shell-distribution>span{flex:1;min-width:38px;max-width:70px;display:flex;flex-direction:column;align-items:center;gap:8px;padding:9px 3px;border:1px solid #e1e9d4;border-radius:7px;background:#fffefa}.shell-distribution small{font-size:7px;color:#a2b08e}.shell-distribution strong{font-size:23px;font-weight:500;color:#7c985f}.atomic-configuration{padding:19px 22px;border-top:1px solid #e8edde}.atomic-configuration>small{font-size:7px;letter-spacing:1px;color:#a7b49a}.atomic-configuration>p{font-size:13px;line-height:2;color:#829b6a;margin-top:10px;overflow-wrap:anywhere}.atomic-model-note{font-size:10px;line-height:2;color:#a3b091;padding:0 22px 20px}.compact.atom-3d-viewer{margin-top:23px}.compact .atom-3d-stage{min-height:295px}.compact .shell-distribution{padding:12px 10px;gap:5px}.compact .shell-distribution>span{min-width:35px;padding:7px 2px}.compact .shell-distribution strong{font-size:21px}.compact .atomic-configuration{padding:15px 17px}.compact .atomic-configuration>p{font-size:12px}.compact .atomic-model-note{padding:0 17px 17px;font-size:9px}.atomic-picker-panel{padding:25px}.atomic-picker-panel>h3{font-size:23px;letter-spacing:-.7px;margin:12px 0 20px}.atomic-picker-panel>h3>span{font-family:var(--serif);font-weight:400;color:#a6ba8b;margin-left:12px}.atomic-picker-panel .search-input{padding:11px 12px}.atomic-picker-panel .search-input input{font-size:11px}.atomic-period-filter{display:flex;gap:9px;align-items:center;font-size:9px;color:#a0af8f;margin:15px 0}.atomic-period-filter select{border:1px solid #e0e7d4;background:#f9fbf4;border-radius:6px;padding:8px;color:#8ba170;font-size:10px}.atomic-period-filter>span{margin-left:auto;font-size:8px}.atomic-picker-grid{display:grid;grid-template-columns:repeat(6,minmax(0,1fr));gap:5px;max-height:280px;overflow:auto;overscroll-behavior:contain;scrollbar-width:thin;scrollbar-color:#becfad transparent;padding:3px}.atomic-picker-grid button{display:flex;flex-direction:column;text-align:center;align-items:center;border-radius:5px;border:1px solid #0000000d;padding:5px 2px;min-height:61px;transition:opacity .2s}.atomic-picker-grid button.selected{outline:2px solid #739359;outline-offset:-2px;box-shadow:0 0 0 2px #f6f9ee}.atomic-picker-grid small{align-self:flex-start;font-size:7px;margin-left:3px;opacity:.65}.atomic-picker-grid strong{font-size:17px;font-weight:500;line-height:1.5}.atomic-picker-grid button>span{font-size:5px;max-width:100%;overflow:hidden;white-space:nowrap;text-overflow:ellipsis}.atomic-facts{margin:22px 0 0}.atomic-facts>div{display:flex;justify-content:space-between;gap:16px;margin:14px 0;font-size:10px}.atomic-facts dt{color:#a5b295}.atomic-facts dd{margin:0;text-align:right;color:#8a9f71;font-weight:500}@media(max-width:1020px){.atomic-explorer-layout{grid-template-columns:1fr}.atomic-picker-grid{grid-template-columns:repeat(10,minmax(0,1fr));max-height:240px}.atomic-picker-panel>h3{font-size:24px}.atom-3d-stage{min-height:400px}.molecule-stage{min-height:450px}.expanded-molecule-picker{max-height:230px;grid-template-columns:repeat(6,minmax(0,1fr))}.expanded-molecule-picker button>span{font-size:6px}}@media(max-width:650px){.atomic-explorer-layout{gap:18px}.atom-3d-stage{min-height:340px}.compact .atom-3d-stage{min-height:270px}.atom-3d-stage .molecule-footer{font-size:8px;left:14px;right:14px}.shell-distribution{padding:13px 10px;gap:5px}.shell-distribution>span{min-width:34px;padding:8px 2px;gap:6px}.shell-distribution strong{font-size:22px}.shell-distribution small{font-size:6px}.atomic-configuration{padding:17px}.atomic-configuration>p{font-size:12px}.atomic-model-note{padding:0 17px 18px;font-size:10px}.atomic-picker-panel{padding:22px 17px}.atomic-picker-grid{grid-template-columns:repeat(6,minmax(0,1fr));max-height:260px;gap:6px}.atomic-picker-grid button{min-height:66px}.atomic-picker-grid strong{font-size:19px}.atomic-picker-grid button>span{font-size:6px}.atomic-facts>div{font-size:11px}.molecule-stage{min-height:425px}.expanded-molecule-picker{grid-template-columns:repeat(3,minmax(0,1fr));max-height:255px}.expanded-molecule-picker button>span{font-size:8px}.expanded-molecule-picker button>strong{font-size:23px}.expanded-lab-tabs button:nth-child(3){flex-basis:100%;flex-direction:row;font-size:10px}.molecule-catalog-filter{font-size:10px}.molecule-catalog-filter select{font-size:11px;padding:9px}.molecule-search input{font-size:12px}}
