:root{--ink:#1c3028;--green:#173f35;--muted:#526258;--paper:#f5f3eb;--line:#ccd3c5;--sage:#e6ecdf;--amber:#e8a95b;--white:#fff;--serif:Georgia,'Times New Roman',serif;--sans:system-ui,-apple-system,BlinkMacSystemFont,'Segoe UI',sans-serif}
*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-block-start:2rem}body{margin:0;background:var(--paper);color:var(--ink);font-family:var(--sans);font-size:16px;line-height:1.65}a{color:inherit;text-underline-offset:4px}a:hover{color:#8a4717}button,input,select{font:inherit}button,a,input,select{touch-action:manipulation}img{display:block;max-inline-size:100%;block-size:auto}button{cursor:pointer}button:hover,.button:hover{background:#2e5a47;color:white}a:focus-visible,button:focus-visible,input:focus-visible,select:focus-visible,[tabindex]:focus-visible{outline:3px solid #9d4e11;outline-offset:4px}[hidden]{display:none!important}.wrap{max-inline-size:1240px;margin-inline:auto;padding-inline:40px}.skip{position:absolute;inset-block-start:-100px;inset-inline-start:16px;padding:10px;background:var(--green);color:white;z-index:10}.skip:focus{inset-block-start:10px}.site-header{border-block-end:1px solid 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a{display:block;margin-block:14px}.table-scroll{overflow-x:auto;max-inline-size:100%;margin-block:25px}table{border-collapse:collapse;inline-size:100%;font-size:13px;line-height:1.6}th,td{text-align:start;padding:14px 16px;border-block-end:1px solid var(--line);min-inline-size:110px;vertical-align:top}th{background:var(--sage);font-size:11px;font-weight:650}td{background:#fffdf8}.article-layout{display:grid;grid-template-columns:1fr 250px;gap:75px;align-items:start}.article-hero{border:1px solid var(--line);margin-block:25px 32px;inline-size:100%;aspect-ratio:2.1;object-fit:cover}.article-date{font-size:11px;color:var(--muted);display:flex;flex-wrap:wrap;gap:14px}.article-title{font-size:clamp(35px,4vw,55px)}.search-box{max-inline-size:650px;margin-block:25px 30px}.search-box label{display:block;font-size:12px;font-weight:600;margin-block-end:8px}.search-box 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@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*{transition:none!important}}
@media(max-width:900px){.wrap{padding-inline:25px}.main-nav{gap:17px}.hero{gap:24px}.hero h1{font-size:52px}.tool-card-body{padding:18px}.tool-card h3{font-size:24px}.method-band{grid-template-columns:1fr;gap:24px}.article-layout{gap:35px;grid-template-columns:1fr 200px}.tool-explainer{gap:35px;grid-template-columns:1fr 220px}.result{padding:28px}.calculator-form{padding:25px}}
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@media print{.site-header,.footer,.aside-card,.hero-actions,.form-actions{display:none}body{background:white}.wrap{max-inline-size:none;padding:0}.article-layout,.tool-explainer{display:block}.prose{max-inline-size:none}a{color:inherit}.calculator-shell{break-inside:avoid}}
.topic-atlas{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}.topic-atlas a{text-decoration:none}.topic-atlas img{border:1px solid var(--line);aspect-ratio:2;object-fit:contain}.topic-atlas span{display:flex;justify-content:space-between;font-family:var(--serif);font-size:22px;border-block-end:1px solid var(--line);padding-block:14px}.topic-atlas b{font-family:var(--sans);font-size:18px;font-weight:400}@media(max-width:650px){.topic-atlas{grid-template-columns:1fr;gap:22px}.topic-atlas a{display:grid;grid-template-columns:110px 1fr;gap:15px;align-items:center}.topic-atlas span{font-size:23px}.topic-atlas img{aspect-ratio:1;object-fit:cover}}
.category-intro{margin-block:15px 40px}.category-intro h2{margin-block-start:0}

/* Illustrated math workbench, November 2026. */
:root{--paper:#f5f1e6;--line:#b9c9b6;--sage:#e2eada}
.hero{gap:48px;padding-block:54px 46px}.hero>div,.hero-visual{min-inline-size:0}.hero h1{font-size:clamp(46px,5.2vw,73px);line-height:1.02;letter-spacing:-2.7px}
.hero-visual{background:#e2eada;border:1px solid var(--green);padding:14px;box-shadow:9px 9px 0 #d4ddca;transform:rotate(1deg)}.visual-tab{display:flex;justify-content:space-between;gap:15px;border-block-end:1px solid #afc0a9;padding:2px 1px 12px;font:650 9px/1.5 var(--sans);letter-spacing:1.2px}.hero-caption{font-size:8px;letter-spacing:1px;gap:12px}.hero-visual>img{aspect-ratio:1.5;object-fit:contain}
.tool-grid{gap:24px}.tool-card{position:relative;border-color:#afc1aa;box-shadow:0 4px 0 #dce4d2}.tool-card img{aspect-ratio:1.45;object-fit:contain;background:#e5ecdf;padding:12px}.tool-card-body{display:flex;flex-direction:column;flex:1;padding:27px}.tool-card h3{font-size:30px}.tool-card p{flex:1}.card-link{border-block-start:1px solid var(--line);padding-block-start:16px}.card-number{color:#425b46}.tool-card:nth-child(2) img{background:#efe3cd}.tool-card:nth-child(3) img{background:#e1e9e4}
.method-band{position:relative;padding:46px;gap:36px}.method-band:before{content:'';position:absolute;inset-block-start:0;inset-inline:0;block-size:6px;background:repeating-linear-gradient(90deg,var(--amber) 0,var(--amber) 1px,transparent 1px,transparent 12px)}
.field-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:30px 24px}.field-card{min-inline-size:0;display:flex;flex-direction:column;background:#fffdf7;border:1px solid var(--line)}.field-art{display:block;overflow:hidden;border-block-end:1px solid var(--line);background:#e7edde}.field-art img{inline-size:100%;aspect-ratio:1.55;object-fit:contain;transition:transform .2s}.field-art:hover img{transform:scale(1.035)}.field-body{padding:24px;display:flex;flex-direction:column;flex:1}.field-body .eyebrow{font-size:9px;letter-spacing:1px;color:#526258;margin-block-end:14px}.field-body h3{font-family:var(--serif);font-size:26px;line-height:1.18;margin-block-end:14px;letter-spacing:-.4px}.field-body h3 a{text-decoration:none}.field-body>p:not(.eyebrow){font-size:13px;color:var(--muted)}.field-link{display:flex;justify-content:space-between;gap:15px;font-size:11px;font-weight:650;margin-block-start:auto;padding-block-start:12px;text-decoration:none}
.topic-atlas{gap:24px}.topic-atlas img{aspect-ratio:1.45;object-fit:contain;padding:15px;background:#e5ecdf;border:1px solid #b6c7b1}.topic-atlas a:nth-child(2) img{background:#efe3cd}.topic-atlas a:nth-child(3) img{background:#e1e9e4}.main-nav a,.footer-links a{min-block-size:40px;display:inline-flex;align-items:center}
@media(min-width:1000px){.field-card:first-child{grid-column:span 2;display:grid;grid-template-columns:1.05fr 1fr}.field-card:first-child .field-art{border:0;border-inline-end:1px solid var(--line)}.field-card:first-child .field-art img{block-size:100%;aspect-ratio:1;min-block-size:300px}.field-card:first-child h3{font-size:33px}.field-card:nth-child(6){grid-column:span 2;display:grid;grid-template-columns:1fr 1.05fr}.field-card:nth-child(6) .field-art{border:0;border-inline-end:1px solid var(--line)}.field-card:nth-child(6) .field-art img{block-size:100%;aspect-ratio:1.45}}
@media(max-width:999px){.field-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.hero{gap:32px}.hero h1{font-size:clamp(43px,6vw,60px)}.tool-card-body{padding:20px}.tool-card h3{font-size:26px}}
@media(max-width:650px){.hero{gap:30px;padding-block:34px 38px}.hero h1{font-size:clamp(42px,12vw,58px);letter-spacing:-1.8px}.hero-visual{max-inline-size:none;padding:12px;box-shadow:5px 5px 0 #d4ddca}.hero-visual>img{aspect-ratio:1.45}.visual-tab{font-size:8px;letter-spacing:.6px}.hero-caption{font-size:7px;letter-spacing:.5px}.tool-card{display:flex}.tool-card img{block-size:auto;aspect-ratio:1.65;border:0;border-block-end:1px solid var(--line);padding:15px}.tool-card-body{padding:24px}.tool-card h3{font-size:31px}.tool-card p{font-size:14px}.method-band{padding:30px 24px}.method-steps{grid-template-columns:1fr;gap:22px}.method-steps>div{display:grid;grid-template-columns:34px 1fr;gap:0 14px}.method-steps b{grid-row:span 2}.method-steps h3{margin-block:5px 8px;font-size:15px}.method-steps p{font-size:13px}.field-grid{grid-template-columns:minmax(0,1fr);gap:24px}.field-body{padding:24px}.field-body h3{font-size:28px}.field-art img{aspect-ratio:1.7}.topic-atlas a{display:block}.topic-atlas img{inline-size:100%;aspect-ratio:1.65}.topic-atlas span{font-size:27px}.main-nav{gap:4px 16px;justify-content:start}.main-nav a{min-block-size:36px}.main-nav .nav-tools{padding:5px 10px}.hero-actions{gap:18px}.footer-links a{min-block-size:36px}}
@media(prefers-reduced-motion:reduce){.hero-visual{transform:none}.field-art img{transition:none}}

.hero-visual .workbench-photo{inline-size:100%;aspect-ratio:3/2;object-fit:cover;margin-block-start:12px}.photo-note{font-size:9px;color:var(--muted);margin-block:7px 12px}.workbench-diagram{border-block-start:1px solid #afc0a9;padding-block-start:12px}.workbench-diagram img{inline-size:100%;aspect-ratio:3.3;object-fit:cover;object-position:center}.hero-caption{margin-block-start:12px}

.workbench-diagram img{aspect-ratio:auto;max-block-size:190px;object-fit:contain}

/* Everyday questions photo-first refinement */
.question-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px}.question-card{display:flex;flex-direction:column;min-inline-size:0;border:1px solid var(--line);background:#fffdf7;text-decoration:none}.question-art{background:#e5ecdf;border-block-end:1px solid var(--line);padding:22px}.question-art img{inline-size:100%;block-size:145px;object-fit:contain}.question-card:nth-child(2) .question-art{background:#efe3cd}.question-card:nth-child(3) .question-art{background:#e1e9e4}.question-body{padding:24px;display:flex;flex-direction:column;flex:1}.question-body>p{font-size:14px;margin:0 0 16px}.question-body strong{font-family:var(--serif);font-size:clamp(35px,4vw,48px);font-weight:400;color:var(--green);line-height:1.2;margin-block-end:28px}.question-body>span{display:flex;justify-content:space-between;gap:10px;font-size:11px;border-block-start:1px solid var(--line);padding-block-start:14px;margin-block-start:auto}.question-card:hover{border-color:var(--green)}.question-card:focus-visible{outline:3px solid var(--green);outline-offset:5px}
@media(max-width:850px){.question-grid{gap:16px}.question-art{padding:15px}.question-body{padding:18px}.question-body strong{font-size:34px}}
@media(max-width:650px){.hero-visual{order:-1;transform:none}.hero{gap:26px;padding-block-start:26px}.hero-visual .workbench-photo{aspect-ratio:16/9;max-block-size:250px}.hero-visual .workbench-diagram{display:none}.hero-caption{margin-block-end:0}.hero h1{font-size:clamp(40px,11vw,56px)}.question-grid{grid-template-columns:minmax(0,1fr);gap:20px}.question-card{display:grid;grid-template-columns:105px minmax(0,1fr)}.question-art{display:flex;align-items:center;padding:10px;border-block-end:0;border-inline-end:1px solid var(--line)}.question-art img{block-size:125px}.question-body{padding:22px 18px}.question-body>p{font-size:12px;margin-block-end:10px}.question-body strong{font-size:33px;margin-block-end:18px}.question-body>span{font-size:10px}}

/* Contain narrow-screen reference text */
.article-layout>*{min-inline-size:0}.prose,.aside-card{overflow-wrap:anywhere}.prose table{max-inline-size:100%}@media(max-width:900px){.article-layout{grid-template-columns:minmax(0,1fr)}}