:root{--paper:#f6f4ee;--white:#fffefa;--ink:#193a39;--text:#344d4b;--muted:#5d6d67;--green:#dce5c3;--line:#d5d9ce;--amber:#f1dfbc;--serif:Georgia,'Times New Roman',serif;--sans:Inter,-apple-system,BlinkMacSystemFont,'Segoe UI',sans-serif}*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:22px}body{margin:0;background:var(--paper);color:var(--ink);font-family:var(--sans);font-size:16px;line-height:1.6}h1,h2,h3,p{margin:0}h1,h2{font-family:var(--serif);font-weight:400;letter-spacing:-.055em;line-height:1.01}h1{font-size:clamp(60px,6.4vw,92px)}h2{font-size:clamp(42px,4.5vw,62px)}h1 em,h2 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@media(min-width:1400px){.hero{gap:85px}.hero-art{min-height:540px}.cover-stack{height:400px}}
@media(max-width:1050px){.wrap{width:calc(100% - 48px)}.hero{gap:30px}.hero-art{min-height:460px}.cover-stack{height:315px}.orbit-label{left:32px}.book-grid{gap:30px 20px}.book-copy h3{font-size:21px}.workshop-inner{gap:35px}.code-preview pre{font-size:10px}.filters{grid-template-columns:1fr 1fr}.type-filter{grid-column:1/-1}.type-filter div{max-width:420px}.section-intro{gap:40px}.hero-actions{gap:18px}.hero-note{max-width:300px}}
@media(max-width:760px){.wrap{width:calc(100% - 36px)}.site-header{padding-block:20px;align-items:flex-start;gap:20px}.brand{font-size:11px;gap:9px}.brand strong{font-size:13px}.brand-mark{width:38px;height:38px;font-size:23px}.brand-mark span{font-size:18px}nav{gap:15px;flex-wrap:wrap;justify-content:flex-end;font-size:10px;max-width:230px}nav a{min-height:36px}.nav-download{padding:6px 10px;gap:12px}.hero{grid-template-columns:1fr;padding-block:45px 42px;gap:36px}.hero h1{font-size:76px}.hero .eyebrow{font-size:9px}.hero-description{font-size:15px;margin-top:22px;max-width:480px}.hero-art{min-height:440px;max-width:480px;width:100%;margin:auto}.cover-stack{height:337px;margin-top:65px}.stack-cover{max-width:200px}.hero-note{max-width:100%;font-size:10px}.section-divider{font-size:8px;gap:20px}.section-divider span:last-child{text-align:right}.section{padding-block:55px}.section-intro{grid-template-columns:1fr;gap:23px;margin-bottom:30px}.section-intro>p{font-size:14px}.section-intro h2{font-size:49px}.book-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:32px 20px}.book-copy h3{font-size:23px}.book-copy>p:not(.eyebrow){font-size:12px}.book-copy .eyebrow{font-size:8px}.amazon-placeholder{font-size:9px;padding:10px 4px}.group-heading{gap:10px;margin-bottom:22px}.group-heading h3{font-size:15px}.group-heading span{font-size:10px;white-space:nowrap}.workshop-inner{grid-template-columns:1fr;gap:38px;padding-block:50px}.workshop-inner h2{font-size:65px}.code-preview{transform:none;box-shadow:7px 8px 0 #294b43}.code-preview pre{font-size:10px}.setup-grid{grid-template-columns:1fr;gap:24px}.setup-grid li{position:relative;padding:19px 0 0 58px}.step-number{position:absolute;left:0;top:18px;font-size:30px}.setup-grid h3{margin-top:4px;font-size:17px}.setup-grid p{font-size:13px}.setup-footnote{font-size:12px}.script-grid{grid-template-columns:1fr}.script-card{padding:22px}.footprint-note{padding:20px 18px;gap:12px}.footprint-note h3{font-size:15px}.footprint-note p{font-size:12px}.filters{gap:16px;grid-template-columns:1fr}.type-filter{grid-column:auto}.type-filter div{max-width:none}.results-bar{font-size:10px}.script-description,.chart-setup{min-height:0}.test-stats{grid-template-columns:1fr 1fr;gap:28px}.test-stats strong{font-size:42px}.testing-columns{grid-template-columns:1fr;gap:20px}.footer-inner{flex-wrap:wrap;gap:22px}.footer-inner p{width:100%;order:3}.footer-brand{font-size:21px}dialog{padding:22px}dialog h2{font-size:30px}dialog textarea{height:220px}}
@media(max-width:380px){.wrap{width:calc(100% - 28px)}.review-ribbon{font-size:8px}.site-header{gap:8px}.brand strong{font-size:11px}.brand{font-size:9px}.brand-mark{width:32px;height:32px}nav{max-width:150px;font-size:9px;gap:5px 12px}.nav-download{min-height:34px}.hero h1{font-size:65px}.hero-art{min-height:375px}.cover-stack{height:280px}.orbit-label{font-size:8px;top:38px}.art-caption{font-size:17px}.hero-actions{gap:12px}.text-link{font-size:11px}.button{padding:12px 16px}.book-grid{gap:26px 14px}.book-copy h3{font-size:21px}.amazon-placeholder{font-size:8px}.script-card{padding:18px}.script-card h3{font-size:25px}.type-filter button{font-size:10px}.results-bar{align-items:flex-start}.test-stats strong{font-size:37px}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*{transition:none!important}}
@media print{.review-ribbon,nav,.filters,.actions,.hero-actions,.copy-status,dialog{display:none}.wrap{width:100%}.hero,.section-intro{gap:24px}.section{padding-block:30px}.book-card,.script-card{break-inside:avoid}.code-details:not([open]){display:none}}

/* Keep the small cover caption inside the arched background at every width. */
.orbit-label{left:0;top:25px;width:100%;text-align:center}
.orbit-label,.footer-inner p span{color:#425542}
@media(max-width:760px){.brand{flex-shrink:0}.brand strong{white-space:nowrap}.site-header{gap:10px}nav{max-width:190px}.hero h1{font-size:clamp(52px,15.3vw,64px)}.hero .eyebrow{letter-spacing:.1em}.hero-actions{gap:14px}.hero-actions .button{padding-inline:16px}.hero-actions .text-link{font-size:11px}.hero-art{min-height:410px}.cover-stack{height:310px}}
@media(max-width:380px){nav{max-width:145px}.hero h1{font-size:51px}.hero-art{min-height:365px}.cover-stack{height:265px}}
/* Compact companion card: one slot in the original book grid. */
.download-card{min-width:0;display:flex;flex-direction:column}
.download-card-face{aspect-ratio:2/3;width:100%;background:var(--ink);color:var(--green);padding:25px 22px;display:flex;flex-direction:column;box-shadow:3px 7px 13px #183c3921;border:1px solid #284b46}
.download-card-face .eyebrow{font-size:9px;letter-spacing:.15em;color:#d2dfbd}
.download-card-count{font:400 100px/.95 var(--serif);letter-spacing:-.06em;margin:auto 0 20px}
.download-card-count span{display:block;font:italic 29px/1.2 var(--serif);letter-spacing:-.03em;margin-top:2px}
.download-card-book{font:400 24px/1.1 var(--serif);letter-spacing:-.03em;color:var(--white);padding-top:20px;border-top:1px solid #72846a}
.download-card-version{font-size:8px;margin-top:15px;color:#d2dfbd;line-height:1.5}
.download-card .button{margin-top:auto;gap:12px;width:100%;font-size:11px;padding:10px 8px}
.download-card-individual{font-size:11px;display:flex;align-items:center;justify-content:space-between;min-height:42px;margin-top:6px}
@media(max-width:1050px){.download-card-face{padding:20px 18px}.download-card-count{font-size:80px;margin-bottom:15px}.download-card-book{font-size:21px;padding-top:15px}}
@media(max-width:760px){.download-card-face{padding:17px 15px}.download-card-face .eyebrow{font-size:8px;letter-spacing:.09em}.download-card-count{font-size:70px;margin-bottom:12px}.download-card-count span{font-size:24px}.download-card-book{font-size:21px;padding-top:12px}.download-card-version{font-size:7px;margin-top:12px}.download-card .button{font-size:10px;gap:8px}.download-card-individual{font-size:10px}}
@media(max-width:380px){.download-card-face{padding:14px 12px}.download-card-count{font-size:60px;margin-bottom:9px}.download-card-count span{font-size:20px}.download-card-book{font-size:18px;padding-top:10px}.download-card-version{font-size:6px;margin-top:9px}.download-card .button{font-size:9px}.download-card-individual{font-size:9px}}
/* Artwork derived from the newly created v4 technical-analysis workbench cover. */
.download-card-face.illustrated-resource{position:relative;overflow:hidden;padding:0;background:#031222;border-color:#102c3d;container-type:inline-size}
.resource-art{position:absolute;inset:0;width:100%;height:100%;object-fit:cover}
.resource-art-title{position:absolute;top:5.5%;left:5%;width:90%;text-align:center;display:flex;flex-direction:column;align-items:center;line-height:1;color:#f8f7ef}
.resource-eyebrow{font:700 9px/1.4 var(--sans);font-size:3.2cqw;text-transform:uppercase;letter-spacing:.12em;color:#f6c264}
.resource-art-title strong{font-family:Impact,'Arial Narrow',var(--sans);font-size:78px;font-size:28cqw;line-height:1.02;letter-spacing:-.035em;font-weight:800;margin-top:8px;margin-top:2.8cqw;color:#f6c264}
.resource-art-name{font-family:Impact,'Arial Narrow',var(--sans);font-size:26px;font-size:9.4cqw;line-height:1.14;text-transform:uppercase;font-weight:750;letter-spacing:.015em;margin-top:5px;margin-top:1.8cqw}
.resource-art-badge{position:absolute;left:10%;bottom:3.5%;width:80%;padding:6px 4px;border:1px solid #be923e;background:#031222e8;text-align:center;font:700 10px/1.2 var(--sans);font-size:3.8cqw;text-transform:uppercase;letter-spacing:.18em;color:#f6c264}
.resource-eyebrow{font-size:clamp(8px,3.2cqw,10px)}
.resource-art-title strong{font-size:clamp(48px,28cqw,88px)}
.resource-art-name{font-size:clamp(16px,9.4cqw,30px)}
.resource-art-badge{font-size:clamp(9px,3.8cqw,12px)}

/* Merrick Learning Lab: extend the established v4 visual system. */
.book-filters{display:flex;gap:20px;align-items:end;padding:22px;background:#e8edde;margin-bottom:14px}.book-filters>div{flex:1}.book-filters label{display:block;font-weight:650;font-size:13px;margin-bottom:6px}.book-filters input,.book-filters select{width:100%;min-height:48px;border:1px solid #81917f;background:var(--white);padding:10px}.collection-note{margin:-10px 0 24px;color:var(--muted);font-size:13px}.proposal{font-size:11px!important;color:#665631!important}.book-resource{font-size:12px;display:block;padding:12px 0}.resource-intro{display:flex;align-items:center;gap:28px;margin-bottom:30px}.resource-intro p{max-width:500px}.resource-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:18px}.resource-card{padding:24px;background:var(--white);border:1px solid var(--line);scroll-margin-top:24px}.resource-card h3{font-size:20px}.resource-card p{font-size:14px;margin-block:14px}.resource-card .actions{display:flex;flex-wrap:wrap;gap:8px 18px}.resource-card a{font-size:13px;display:inline-block;min-height:44px;padding-block:10px}.data-links{columns:2;overflow-wrap:anywhere}.data-links li{break-inside:avoid;margin-bottom:12px}.setup-illustration{width:100%;height:auto;margin:18px 0 24px}.illustration-note{font-size:13px;margin:24px 0}.validation-addendum{padding:20px;background:var(--green);margin-bottom:28px}.about{border-top:1px solid var(--line)}.about h2{margin:18px 0 28px}.about>p:not(.eyebrow),.about details{max-width:760px;margin-bottom:20px}.about summary{cursor:pointer;font-weight:600;min-height:44px}.about details p{margin-top:16px}.book-card img{object-fit:contain;background:#ebe9e1}.book-copy .amazon-placeholder{font-size:11px}.site-header nav{gap:22px}.book-card:target,.resource-card:target,.script-card:target{outline:3px solid #b35e32;outline-offset:6px}
@media(max-width:1050px){.resource-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.site-header nav{gap:12px}}
@media(max-width:760px){.book-filters{flex-direction:column;align-items:stretch}.book-filters>div{width:100%}.resource-intro{display:block}.resource-intro p{margin-top:18px}.resource-grid{grid-template-columns:1fr}.data-links{columns:1}.site-header{align-items:flex-start}.site-header nav{display:grid;grid-template-columns:1fr 1fr;max-width:none;font-size:11px;gap:4px 14px}.site-header nav .nav-download{grid-column:1/-1;justify-content:center;padding:6px 9px}.brand strong{font-size:15px}.brand-mark{width:38px;height:38px;flex-shrink:0}.brand{gap:8px}.book-copy .amazon-placeholder{font-size:10px;white-space:normal;line-height:1.5;min-height:40px}.book-resource{font-size:11px}.resource-card{padding:20px}}
@media(max-width:380px){.site-header{flex-direction:column;gap:16px}.site-header nav{width:100%;grid-template-columns:1fr 1fr 1fr}.site-header nav .nav-download{grid-column:auto}.nav-download span{display:none}}