:root{color-scheme:dark;--bg:#101d22;--panel:#16282c;--panel-2:#1c3032;--ink:#edf1e7;--muted:#9eafb0;--line:#2c4143;--lime:#c7ed87;--mint:#88c9b1;--gold:#e9ce8f;--mono:Consolas,'Courier New',monospace;--sans:Arial,Helvetica,sans-serif}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--bg);color:var(--ink);font-family:var(--sans);font-size:14px;line-height:1.6}button,input,select{font:inherit}button,a,select,input{-webkit-tap-highlight-color:transparent}button,a{touch-action:manipulation}button{cursor:pointer}button:disabled{cursor:default;opacity:.45}a{color:inherit}button{color:inherit}button:focus-visible,a:focus-visible,input:focus-visible,select:focus-visible{outline:2px solid var(--lime);outline-offset:4px}button:focus:not(:focus-visible){outline:none}button,select{border-radius:6px}button{background:none;border:0}button:hover{color:var(--lime)}input,select{color:var(--ink)}[hidden]{display:none!important}.skip{position:fixed;left:15px;top:-100px;z-index:20;background:var(--lime);color:var(--bg);padding:10px 20px}.skip:focus{top:15px}.sidebar{width:230px;position:fixed;inset:0 auto 0 0;background:#111f23;border-right:1px solid var(--line);padding:36px 20px 24px;display:flex;flex-direction:column;z-index:5}.brand{display:flex;align-items:center;gap:12px;text-decoration:none;font-size:15px;line-height:1.25;letter-spacing:-.2px;margin:0 5px 46px}.brand b{font-weight:700}.brand-mark{height:47px;width:47px;display:grid;place-items:center;background:var(--lime);color:#18342a;border-radius:12px;font-family:Georgia,serif;font-style:italic;font-size:33px;letter-spacing:-9px;padding-right:7px;box-shadow:0 4px 19px #c7ed8714}.brand-mark span{font-family:var(--sans);font-style:normal;font-size:20px;margin-left:-5px;align-self:end;margin-bottom:7px}.workspace-label{color:#7b9496;font-size:9px;font-family:var(--mono);letter-spacing:1.3px;margin:0 13px 15px}.workspace-label span{float:right;opacity:.6}.nav-button{display:flex;align-items:center;gap:10px;width:100%;font-size:12px;padding:12px 12px;text-align:left;margin-bottom:5px;color:#adbcba}.nav-symbol{font-family:var(--mono);font-size:19px;line-height:1;width:18px;text-align:center;color:#829f95}.nav-button.active{background:#253c30;color:#e4efcf}.nav-button.active .nav-symbol{color:var(--lime)}.nav-count{margin-left:auto;font-family:var(--mono);font-size:10px;opacity:.7}.sidebar-divider{height:1px;background:var(--line);margin:25px 12px}.starter{display:flex;gap:12px;text-align:left;padding:3px 12px;font-size:11px;color:#ccd7ca}.starter small{display:block;color:#829a98;font-size:10px;margin-top:6px;line-height:1.7}.starter-icon{color:var(--lime);font-size:20px}.sidebar-bottom{margin-top:auto;padding:30px 12px 0;color:#adbdab;font-size:10px}.status-dot,.lab-led{display:inline-block;width:6px;height:6px;background:var(--lime);border-radius:50%;margin-right:7px;box-shadow:0 0 0 4px #c7ed8710}.sidebar-bottom p{color:#748f8c;margin-top:13px;line-height:1.75}.edition{font-family:var(--mono);font-size:8px;letter-spacing:.6px;color:#6b8586}.app-shell{margin-left:230px}.topbar{min-height:78px;border-bottom:1px solid var(--line);display:flex;align-items:center;justify-content:space-between;gap:15px;padding:16px 38px}.breadcrumb{font-size:10px;color:#879e9e}.breadcrumb span{margin:0 11px;color:#546f6e}.breadcrumb b{color:#cdd8ca;font-weight:400}.preferences{display:flex;gap:17px}.preferences label{display:flex;flex-direction:column;gap:3px;font-size:8px;letter-spacing:.4px;color:#829997}.preferences select{background:#15282b;border:1px solid #30494a;font-size:10px;padding:5px 24px 5px 8px;max-width:190px}main{max-width:1450px;margin:0 auto;padding:42px 38px 0}.home-head{display:grid;grid-template-columns:1fr 330px;gap:35px;align-items:center;margin-bottom:38px}.eyebrow{font-family:var(--mono);letter-spacing:1.3px;font-size:9px;color:#9fb7a4;margin:0 0 18px}.tiny-grid{color:var(--lime);font-size:17px;margin-right:9px;vertical-align:-1px}h1{font-size:clamp(42px,4vw,66px);line-height:1.02;font-weight:700;letter-spacing:-2.5px;margin:0 0 22px}h1>span:not(.cursor){color:var(--lime)}.cursor{color:#5a836d;font-family:var(--mono);font-weight:400;font-size:.7em;padding-left:10px}.welcome-text{color:#b0c0b9;font-size:13px;line-height:1.85;margin:0 0 24px}.hero-tags{display:flex;flex-wrap:wrap;gap:7px}.hero-tags span{font-size:9px;border:1px solid #355044;padding:5px 8px;border-radius:4px;color:#9eb8a5}.quick-lab{background:linear-gradient(145deg,#1a3031,#182b2d);border:1px solid #3a5147;border-radius:12px;overflow:hidden;box-shadow:0 20px 50px #0002;position:relative}.lab-heading{padding:16px 19px;display:flex;align-items:center;border-bottom:1px solid #34493e;background:#20362e}.lab-heading h2{font:10px 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var(--mono);color:#91a98f;background:#1a2b24}.mini-sheet-labels{font-size:10px;color:#c1d0b8;background:#223c2b}.mini-sheet-inputs{font-size:12px}.mini-sheet-inputs>span{font:9px var(--mono);color:#91a98f;background:#1a2b24}.mini-sheet-inputs input{background:#233c30;border-top:0;border-left:0;border-radius:0;color:#eef5dc;font-family:var(--mono);width:100%;height:34px;-moz-appearance:textfield}.mini-sheet-inputs input::-webkit-inner-spin-button{appearance:none}.lab-formula{display:flex;align-items:center;gap:10px;margin:12px 18px;font:11px var(--mono);border:1px solid #3d5445;border-radius:4px;padding:7px 9px;background:#10221c}.lab-formula>span{color:#789b7c;font-style:italic}.lab-formula code{color:#d3e9ad;font-size:11px}.lab-formula button{margin-left:auto;font-size:16px;line-height:1;color:#a7bd92}.lab-result{margin:14px 18px 16px;display:flex;align-items:center;justify-content:space-between;gap:15px}.lab-result>span{font:8px var(--mono);letter-spacing:1px;color:#9eb397}.lab-result small{display:block;font:10px var(--sans);letter-spacing:0;margin-top:5px;color:#728f80}.lab-result output{font:30px var(--mono);color:var(--lime);line-height:1}.lab-result output.error{font-size:15px;color:#f0bd94}.search-panel{margin-bottom:34px}.search-line{display:flex;align-items:center;background:#1a2c2f;border:1px solid #4e6e58;box-shadow:0 0 0 4px #56795210;border-radius:9px;padding:14px 18px;gap:13px}.search-icon{font:30px var(--sans);color:var(--lime);line-height:1}.search-line input{flex:1;min-width:0;border:0;background:transparent;font-size:13px;outline:none;color:#ebf0e0}.search-line input::-webkit-search-cancel-button{display:none}.search-line input::placeholder{color:#8da49c}.search-line:focus-within{border-color:var(--lime);box-shadow:0 0 0 3px #c7ed8713}.search-line kbd{font:11px var(--mono);color:#859b8d;padding:1px 7px;background:#223a30;border:1px solid #4b6450;border-radius:3px}.search-line button{font-size:20px;line-height:1;padding:0 5px}.search-examples{display:flex;gap:9px;align-items:center;flex-wrap:wrap;margin-top:12px}.search-examples>span{font:8px var(--mono);letter-spacing:1px;color:#668681;margin-right:4px}.search-examples button{font-size:9px;color:#9fb5a5;padding:4px 7px;background:#1d3030;border:1px solid #304843;border-radius:4px}.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:15px;margin-bottom:23px}.section-head .eyebrow{font-size:8px;margin-bottom:10px;color:#76978c}.section-head h2{font-size:23px;line-height:1.2;letter-spacing:-.7px;margin:0}.results-count{font:9px var(--mono);color:#809f8d;margin:0 0 2px;white-space:nowrap}.filter-row{display:flex;gap:6px;flex-wrap:wrap;margin-bottom:22px}.filter-row button{padding:7px 10px;border:1px solid #2e4741;color:#8ea99c;font-size:10px;line-height:1.4}.filter-row button.active{background:#c7ed87;color:#1b3b2b;border-color:#c7ed87}.filter-row button:hover:not(.active){background:#263b31;color:#d9e9c8}.guide-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:15px}.guide-card{border:1px solid #2d4441;border-radius:9px;padding:18px;background:#17292c;display:flex;flex-direction:column;position:relative;min-height:230px;transition:background .15s,border-color .15s,transform .15s}.guide-card:hover{background:#1b3030;border-color:#557257;transform:translateY(-2px)}.card-top{display:flex;align-items:center;justify-content:space-between;margin-bottom:15px;gap:10px}.function-tag{font:11px var(--mono);color:#c8e991;background:#294031;padding:4px 7px;border:1px solid #4b6347;border-radius:4px;max-width:calc(100% - 22px);overflow-wrap:anywhere}.category-logic .function-tag{color:#d7bbef;background:#3c3047;border-color:#5e476d}.category-lookup .function-tag{color:#a7dce9;background:#244047;border-color:#3a6470}.category-text .function-tag{color:#f0d19d;background:#463c2b;border-color:#6b5c3c}.category-dates .function-tag{color:#eab3b2;background:#433032;border-color:#654547}.save-button{font-size:20px;line-height:1;color:#719286;padding:0 2px}.save-button[aria-pressed=true]{color:var(--lime)}.card-title{font-size:16px;line-height:1.3;letter-spacing:-.2px;color:#e7eee0;text-align:left;font-weight:600;padding:0;margin:0 0 10px}.card-title:hover{color:var(--lime)}.card-description{font-size:11px;line-height:1.7;color:#92aca0;margin:0 0 18px}.card-formula{font:9px var(--mono);color:#b2c697;background:#12221e;border:1px solid #294137;border-radius:4px;padding:7px 8px;margin-top:auto;overflow-wrap:anywhere;min-height:30px}.card-bottom{display:flex;justify-content:space-between;gap:8px;margin-top:13px;font-size:8px;color:#7c9a8a}.card-bottom .step-count{color:#b2c5a1}.reference-tools{display:flex;gap:20px;justify-content:space-between;align-items:center;margin-bottom:23px}.reference-tools label{font-size:10px;color:#91ab9c}.reference-tools select{display:block;margin-top:6px;background:#183029;border:1px solid #3c5746;padding:7px 20px 7px 8px;font-size:11px;max-width:250px}.reference-tools p{color:#829d91;font-size:10px;max-width:420px;line-height:1.7}.reference-card{min-height:135px}.reference-card h3{font:15px var(--mono);color:#c7ed87;margin:0 0 10px;overflow-wrap:anywhere}.reference-card p{font-size:10px;color:#8eab9c;margin:0 0 10px}.reference-card a{font-size:10px;text-decoration:none;color:#d8e0bd;margin-top:auto;display:flex;justify-content:space-between;gap:8px}.reference-card a:hover{text-decoration:underline}.ref-version{font:8px var(--mono);color:#6e9581;margin-bottom:15px}.reference-pagination{display:flex;align-items:center;justify-content:center;gap:17px;grid-column:1/-1;padding:18px 0;font:11px var(--mono);color:#a3bba4}.reference-pagination button{border:1px solid #425e49;padding:8px 15px;color:#d1dfba}.empty-state{text-align:center;border:1px dashed #3c5747;padding:50px 20px;border-radius:9px;color:#91ac9b}.empty-state>span{font-size:34px;color:#658e74}.empty-state h3{color:#d8e5cb;font-size:19px}.empty-state p{font-size:12px}.empty-state button{margin-top:10px;padding:9px 15px;background:#c7ed87;color:#183629;font-size:11px}.page-footer{margin-top:46px;padding:25px 0;border-top:1px solid #2b403b;display:flex;justify-content:space-between;gap:20px;font-size:9px;color:#77988a}.page-footer p{margin:0;text-align:right;font-size:8px;color:#597c71;line-height:1.8}.back-link{font:10px var(--mono);color:#a1bd95;padding:0;margin-bottom:21px}.lesson-heading .eyebrow{margin-bottom:12px}.lesson-heading h1{font-size:38px;letter-spacing:-1.3px;line-height:1.15;max-width:850px;margin-bottom:12px}.lesson-summary{font-size:13px;color:#a9bfb0;max-width:730px}.lesson-meta{display:flex;gap:8px;flex-wrap:wrap;margin:17px 0 23px}.lesson-meta span{font:9px var(--mono);border:1px solid #3b5442;padding:4px 8px;border-radius:4px;color:#b6c9a5}.compatibility-note{padding:13px 16px;background:#493a20;border:1px solid #8e713d;color:#efdaa7;border-radius:6px;font-size:12px;margin-bottom:22px}.lesson-layout{display:grid;grid-template-columns:minmax(240px,.83fr) minmax(0,1.25fr);gap:25px;align-items:start}.steps-panel{display:flex;flex-direction:column;gap:9px}.step-button{display:flex;align-items:flex-start;gap:12px;text-align:left;border:1px solid #2c443b;padding:14px;background:#17292a;border-radius:8px;color:#849f92}.step-button.active{background:#223d30;border-color:#93ac64}.step-number{height:25px;width:25px;border-radius:5px;background:#263d31;color:#a9c596;display:grid;place-items:center;font:11px var(--mono);flex-shrink:0}.step-button.active .step-number{color:#173b25;background:#c7ed87}.step-button strong{font-size:12px;color:#d8e5ca;line-height:1.5;display:block}.step-button p{font-size:11px;margin:5px 0 0;line-height:1.75;color:#a2bba7}.diagram-panel{background:#172a2b;border:1px solid #3b5547;border-radius:10px;overflow:hidden;position:sticky;top:20px}.diagram-top{display:flex;justify-content:space-between;gap:10px;padding:13px 16px;background:#233b2f;border-bottom:1px solid #3b5547;font:9px var(--mono);color:#c5d7ae}.diagram-top>span:last-child{color:#809f85;font-size:8px}.worksheet{padding:17px 15px 16px}.worksheet-ribbon{font-size:9px;color:#9cb2a1;display:flex;gap:16px;border-bottom:1px solid #3f5748;padding:0 0 12px;margin-bottom:12px;overflow:auto;white-space:nowrap}.worksheet-ribbon b{color:#d3ebad;font-weight:400;border-bottom:2px solid var(--lime);padding-bottom:5px}.worksheet-formula{display:flex;align-items:center;border:1px solid #3e5948;border-radius:4px;background:#12261d;overflow:hidden;margin-bottom:12px;min-height:36px}.cell-address{font:9px var(--mono);color:#aac59a;padding:6px 10px;border-right:1px solid #3e5948;min-width:42px}.fx{font:italic 17px Georgia,serif;color:#769e7e;padding:0 10px}.worksheet-formula code{font:10px var(--mono);color:#d6ebbc;white-space:pre-wrap;overflow-wrap:anywhere;padding:6px 7px 6px 0;min-width:0}.worksheet-formula.highlight{border-color:#b8d67f;box-shadow:0 0 0 3px #c7ed8715}.sheet-scroll{overflow:auto;border:1px solid #4b6550;border-radius:3px}.sheet-table{border-collapse:collapse;width:100%;table-layout:fixed;font:10px var(--mono);min-width:370px;background:#213c2e;color:#d9e9c9}.sheet-table td,.sheet-table th{border:1px solid #3d5744;padding:8px 6px;text-align:left;overflow-wrap:anywhere;vertical-align:middle}.sheet-table .col-head,.sheet-table .row-head{background:#162b22;color:#88aa88;text-align:center;font-size:9px;font-weight:400}.sheet-table .row-head{width:25px}.sheet-table .data-header{background:#304e36;color:#e2ebc9;font-family:var(--sans);font-size:9px}.sheet-table .range{background:#365439}.sheet-table .target{outline:2px solid #c7ed87;outline-offset:-2px;background:#3d613b;color:#effed3;position:relative}.sheet-table .target.result{font-weight:700;background:#b5dc7d;color:#173a24}.worksheet-caption{font-size:10px;color:#8cae91;margin:13px 0 0;line-height:1.7}.diagram-nav{display:flex;align-items:center;justify-content:space-between;border-top:1px solid #3b5547;padding:12px 15px;gap:10px}.diagram-nav>span{font:9px var(--mono);color:#849e88}.diagram-nav button{border:1px solid #567344;border-radius:4px;font-size:10px;padding:7px 13px;color:#d6e8b9}.diagram-nav button.primary{background:#c7ed87;color:#1c3e28;border-color:#c7ed87}.lesson-actions{display:flex;flex-wrap:wrap;gap:8px;padding:13px 15px;background:#142720;border-top:1px solid #304b36}.lesson-actions button{border:1px solid #3c5b42;color:#b4cea4;font-size:10px;padding:7px 10px}.formula-block{margin:23px 0;border:1px solid #3e5941;background:#12261c;padding:17px;border-radius:8px}.formula-block>span{font:9px var(--mono);letter-spacing:1px;color:#83a581;display:block;margin-bottom:10px}.formula-block code{font:12px var(--mono);color:#d6ecae;overflow-wrap:anywhere;display:block}.lesson-bottom{display:grid;grid-template-columns:1fr 1fr;gap:20px;margin-top:25px}.lesson-note{padding:20px;border:1px solid #314a3b;border-radius:8px;background:#162a25}.lesson-note h2{font-size:15px;margin:0 0 13px;color:#dceacb}.lesson-note p,.lesson-note li{font-size:12px;line-height:1.9;color:#a7bfab}.lesson-note p{margin:0}.lesson-note ul{margin:0;padding-left:16px}.source-link{display:inline-block;margin-top:19px;color:#a5c68d;font-size:10px;text-underline-offset:4px}.lesson-related{margin-top:25px}.lesson-related h2{font-size:15px}.related-buttons{display:flex;gap:8px;flex-wrap:wrap}.related-buttons button{font-size:11px;border:1px solid #3b5840;padding:8px 12px;color:#bad2a7}.help-title{font-size:35px;letter-spacing:-1px}.help-intro{max-width:690px;color:#adc1b2;font-size:13px}.help-grid{display:grid;grid-template-columns:1fr 1fr;gap:17px;margin-top:25px}.help-card{border:1px solid #3d5341;border-radius:8px;padding:22px;background:#172b27}.help-card h2{font:19px var(--mono);color:#d4e7a6;margin:0 0 10px}.help-card p{font-size:12px;line-height:1.9;color:#a7c0ac}.help-card strong{font-size:12px;color:#dee9c8}.help-card code{font-family:var(--mono);color:#d4e4ae}.help-card a{font-size:10px;color:#a8c692;text-underline-offset:4px}.toast{position:fixed;bottom:24px;left:calc(50% + 115px);transform:translate(-50%,20px);opacity:0;pointer-events:none;border:1px solid #839f5f;background:#284735;color:#e2efcd;padding:10px 19px;border-radius:7px;font-size:12px;z-index:50;transition:opacity .15s,transform .15s}.toast.visible{opacity:1;transform:translate(-50%,0)}
@media(min-width:1550px){main{padding-top:55px}.home-head{grid-template-columns:1fr 380px;gap:60px}.quick-lab{max-width:380px}h1{font-size:70px}}
@media(max-width:1180px){.sidebar{width:205px;padding-inline:15px}.app-shell{margin-left:205px}.brand{font-size:14px;gap:10px}.nav-button{font-size:11px;padding-inline:10px}.topbar{padding-inline:26px}main{padding:32px 26px 0}.home-head{grid-template-columns:1fr 290px;gap:24px}.guide-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.lesson-layout{grid-template-columns:minmax(220px,.85fr) minmax(0,1.1fr);gap:18px}.preferences{gap:10px}.breadcrumb{font-size:9px}.toast{left:calc(50% + 102px)}}
@media(max-width:900px){.sidebar{width:180px;padding:27px 12px}.app-shell{margin-left:180px}.brand{font-size:13px;gap:9px;margin-bottom:34px}.brand-mark{width:38px;height:40px;font-size:30px}.nav-button{font-size:10px;gap:7px;padding:10px 8px}.nav-symbol{font-size:17px}.nav-count{font-size:8px}.workspace-label{font-size:8px;margin-inline:8px}.starter{font-size:10px;gap:7px;padding-inline:8px}.starter small{font-size:9px}.topbar{padding:13px 20px;flex-wrap:wrap;min-height:76px}.preferences label{font-size:7px}.preferences select{font-size:9px;max-width:180px}main{padding:28px 20px 0}.home-head{grid-template-columns:1fr 265px;gap:22px}h1{font-size:44px;letter-spacing:-1.9px}.welcome-text{font-size:11px}.hero-tags{gap:5px}.hero-tags span{font-size:8px;padding:4px 6px}.eyebrow{font-size:8px}.home-head .eyebrow{letter-spacing:.6px}.quick-lab .lab-heading{padding-inline:15px}.lesson-layout{grid-template-columns:1fr}.diagram-panel{position:static}.steps-panel{display:grid;grid-template-columns:1fr 1fr}.step-button{padding:11px;gap:8px}.step-button p{font-size:10px}.step-button strong{font-size:11px}.step-number{width:21px;height:21px;font-size:10px}.worksheet{padding:18px}.sheet-table{font-size:11px}.toast{left:calc(50% + 90px)}.page-footer{flex-direction:column;gap:9px}.page-footer p{text-align:left}.reference-tools{align-items:flex-start;flex-direction:column;gap:10px}.reference-tools p{margin:0}}
@media(max-width:740px){.sidebar{position:static;width:100%;padding:17px 20px 0;border-right:0;border-bottom:1px solid var(--line)}.brand{margin:0 0 15px;font-size:14px}.brand br{display:none}.brand b{margin-left:5px}.brand-mark{width:35px;height:35px;border-radius:8px;font-size:27px}.brand-mark span{font-size:17px;margin-bottom:5px}.sidebar .workspace-label,.sidebar-divider,.starter,.sidebar-bottom{display:none}.sidebar nav{display:flex;overflow:auto;gap:8px}.nav-button{white-space:nowrap;width:auto;flex-shrink:0;font-size:10px;margin-bottom:0;border-radius:5px 5px 0 0;padding:10px 9px}.nav-symbol{font-size:15px;width:auto}.nav-count{margin-left:3px}.app-shell{margin-left:0}.topbar{padding:12px 20px}.breadcrumb{display:none}.preferences{width:100%;justify-content:space-between}.preferences label{font-size:8px;flex-direction:row;align-items:center;gap:7px}.preferences select{font-size:9px;max-width:155px;padding-right:17px}main{padding:27px 20px 0}.home-head{grid-template-columns:1fr 270px;gap:22px;align-items:center;margin-bottom:25px}h1{font-size:44px}.welcome-text{font-size:12px}.hero-tags{display:none}.home-head .eyebrow{font-size:7px;line-height:1.8;margin-bottom:12px}.search-line{padding:13px 12px;gap:10px}.search-line input{font-size:12px}.search-line kbd{display:none}.search-examples{gap:6px}.search-examples>span{display:none}.search-examples button{font-size:9px}.section-head h2{font-size:22px}.section-head{margin-bottom:19px}.section-head .eyebrow{font-size:7px;letter-spacing:.8px}.guide-card{padding:17px;min-height:220px}.card-title{font-size:16px}.card-description{font-size:12px}.card-formula{font-size:10px}.card-bottom{font-size:9px}.filter-row{gap:6px}.filter-row button{font-size:10px}.toast{left:50%;max-width:90%;width:max-content}.lesson-heading h1{font-size:31px}.lesson-bottom{grid-template-columns:1fr}.help-grid{grid-template-columns:1fr}.page-footer{margin-top:32px}.steps-panel{gap:8px}.lesson-meta span{font-size:8px}}
@media(max-width:560px){.home-head{grid-template-columns:1fr;gap:25px}.welcome-copy{position:relative;padding-right:0}.home-head h1{font-size:53px;line-height:1.02;letter-spacing:-2.2px}.home-head h1 br{display:none}.home-head h1>span:not(.cursor){padding-left:10px}.welcome-text{font-size:12px;margin-bottom:0}.welcome-text br{display:none}.quick-lab{width:100%;max-width:none}.lab-heading{padding-block:12px}.lab-tabs{padding-top:12px}.lab-result output{font-size:27px}.lab-result{margin-bottom:15px}.home-head .eyebrow{margin-bottom:13px;letter-spacing:1px;font-size:8px}.hero-tags{display:none}.search-panel{margin-bottom:28px}.search-line input{font-size:12px;line-height:1.5}.search-icon{font-size:26px}.guide-grid{grid-template-columns:1fr}.guide-card{min-height:0;padding:19px}.card-top{margin-bottom:13px}.card-title{font-size:18px}.card-description{font-size:12px;margin-bottom:15px}.card-formula{font-size:11px}.card-bottom{font-size:10px}.function-tag{font-size:11px}.reference-card{min-height:145px}.reference-card h3{font-size:18px}.section-head{align-items:flex-start;flex-direction:column;gap:10px}.results-count{font-size:10px}.preferences label{flex-direction:column;align-items:flex-start;font-size:8px}.preferences select{max-width:190px;font-size:10px}.sidebar nav{gap:0;margin-inline:-8px}.nav-button{padding-inline:8px;font-size:9px}.nav-count{display:none}.nav-symbol{font-size:15px}.sidebar{padding-inline:20px}.steps-panel{grid-template-columns:1fr}.step-button{padding:14px}.step-button strong{font-size:13px}.step-button p{font-size:12px}.step-number{width:25px;height:25px;font-size:11px}.lesson-summary{font-size:13px}.worksheet{padding:15px 10px}.worksheet-formula code{font-size:10px}.sheet-table{font-size:10px;min-width:360px}.worksheet-caption{font-size:11px}.lesson-actions button{font-size:11px}.diagram-nav button{font-size:11px}.formula-block code{font-size:12px}.help-card{padding:19px}.help-card p{font-size:13px}}
@media(max-width:365px){main{padding-inline:15px}.topbar{padding-inline:15px}.sidebar{padding-inline:15px}.home-head h1{font-size:45px}.home-head .eyebrow{font-size:7px}.nav-button{font-size:8px;gap:5px}.preferences select{max-width:165px}.search-examples button{font-size:8px}.search-line{padding-inline:10px}.lesson-heading h1{font-size:28px}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*{transition:none!important}}
@media print{.sidebar,.topbar,.search-panel,.home-head,.back-link,.page-footer,.lesson-actions,.diagram-nav,.save-button,.toast,.related-buttons{display:none!important}.app-shell{margin:0}body{background:white;color:black}main{padding:0}.lesson-layout{display:block}.steps-panel{display:block}.step-button{display:flex;background:white;color:black;border:1px solid #ccc;margin-bottom:8px;break-inside:avoid}.step-button p,.step-button strong{color:black}.diagram-panel{position:static;margin-top:15px;break-inside:avoid}.lesson-heading h1,.lesson-summary,.lesson-meta span,.lesson-note h2,.lesson-note p,.lesson-note li{color:black}.lesson-note{background:white}.lesson-bottom{display:block}.lesson-note{margin-top:15px}.formula-block{background:white}.formula-block code{color:black}}

.reference-suggestion-heading{grid-column:1/-1;display:flex;align-items:center;justify-content:space-between;gap:15px;margin:16px 0 0;padding-top:23px;border-top:1px solid #304b3b;color:#799c87;font:9px var(--mono);letter-spacing:.7px}.reference-suggestion-heading button{font:10px var(--sans);letter-spacing:0;color:#b6d797;padding:6px 0}
/* Readability refinements for step-by-step learning. */
.brand-mark{display:block;position:relative;text-align:center;line-height:47px;letter-spacing:-3px;padding-right:10px}
.brand-mark span{position:absolute;right:7px;bottom:6px;font-size:20px;line-height:1;margin:0}
.step-button strong{font-size:14px}.step-button p{font-size:13px}.worksheet-caption{font-size:12px}.worksheet-formula code{font-size:12px}.sheet-table{font-size:12px;min-width:410px}.sheet-table .data-header{font-size:11px}.diagram-top{font-size:10px}.lesson-actions button{font-size:12px}.diagram-nav button{font-size:12px}.lesson-meta span{font-size:10px}
@media(max-width:900px){.brand-mark{line-height:40px}.brand-mark span{font-size:17px;right:6px;bottom:5px}.steps-panel{grid-template-columns:1fr}.step-button strong{font-size:14px}.step-button p{font-size:13px}}
@media(max-width:740px){.brand-mark{line-height:35px}.brand-mark span{font-size:15px;right:5px;bottom:5px}.worksheet-formula code{font-size:11px}.sheet-table{font-size:11px}}