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.case-lab{max-width:960px}.case-lab>article{padding:42px;background:white;border-top:9px solid var(--blue)}.case-scenario{max-width:800px;font:400 21px/1.55 Georgia,serif}.case-lab article>h2{margin-top:42px;font:700 30px Georgia,serif}.case-lab article>ol{padding-left:25px}.case-lab article>ol li{padding:12px 0 12px 8px;border-bottom:1px solid var(--line)}
@media(max-width:960px){.mode-grid{grid-template-columns:1fr 1fr}.case-grid,.session-grid{grid-template-columns:1fr}.case-card,.session-card{min-height:250px}.case-card h3,.session-card h3{margin-top:38px}}
@media(max-width:650px){.continue-strip .page{grid-template-columns:1fr}.continue-strip .hero-actions{align-items:stretch}.mode-grid,.glossary-list,.session-meta,.case-layers{grid-template-columns:1fr}.mode-grid button{min-height:190px}.session-pack,.case-lab>article{padding:24px}.session-pack li{grid-template-columns:60px 1fr;gap:12px}}
@media print{.facilitation-plan .button,.case-lab>.button,.case-lab+.form-actions{display:none!important}.session-pack,.case-lab>article{border:0;padding:0}.session-pack li{break-inside:avoid}.guide-hero:before{display:none}}

/* Public release: the product now fills the space previously occupied by the preview bar. */
.screen,.workflow-shell{min-height:calc(100vh - 76px)}

/* First-visit orientation: hero assurance line + how-it-works strip. */
.hero-assurance{margin:18px 0 0;color:var(--muted);font-size:10px;font-weight:750;letter-spacing:.1em;text-transform:uppercase}
.how-strip{background:var(--ink);color:white;padding:34px 0 38px}
.how-strip .eyebrow{color:var(--sky);margin-bottom:18px}
.how-steps{list-style:none;margin:0;padding:0;display:grid;grid-template-columns:repeat(4,1fr);gap:1px;background:#3b4f63}
.how-steps li{padding:18px 20px;background:var(--ink-2)}
.how-steps span{display:block;color:var(--sky);font:700 22px/1 Georgia,serif}
.how-steps strong{display:block;margin-top:10px;font-size:13px;letter-spacing:.02em}
.how-steps small{display:block;margin-top:6px;color:#b8c4cf;font-size:11px;line-height:1.5}
@media(max-width:960px){.how-steps{grid-template-columns:1fr 1fr}}
@media(max-width:650px){.how-steps{grid-template-columns:1fr}}

/* Book & Learn: tabbed views + collapsible chapter accordions (condensed reference layer). */
.book-tabs{position:sticky;top:76px;z-index:80;background:var(--paper);border-bottom:1px solid var(--line)}.book-tabs .page{display:flex;gap:28px}.book-tab{position:relative;border:0;padding:20px 0;background:transparent;color:var(--muted);font-size:11px;font-weight:800;letter-spacing:.1em;text-transform:uppercase}.book-tab:hover{color:var(--ink)}.book-tab.active{color:var(--ink)}.book-tab.active:after{content:"";position:absolute;right:0;bottom:0;left:0;height:3px;background:var(--blue)}
.book-search{max-width:720px;margin-bottom:14px}
.layer-panel{margin-bottom:20px}
.chapter-accordions{display:grid;gap:10px}
.chapter-accordion{background:white;border:1px solid var(--line)}
.chapter-accordion[hidden]{display:none}
.chapter-accordion>summary{display:grid;grid-template-columns:1fr auto;gap:6px 18px;align-items:baseline;padding:18px 22px;cursor:pointer;list-style:none}
.chapter-accordion>summary::-webkit-details-marker{display:none}
.chapter-accordion>summary:after{content:"+";grid-column:2;grid-row:1/span 3;align-self:center;color:var(--blue);font:400 24px/1 Georgia,serif}
.chapter-accordion[open]>summary:after{content:"–"}
.chapter-accordion>summary:hover{background:var(--paper)}
.chapter-accordion>summary:focus-visible{outline:3px solid var(--focus);outline-offset:-3px}
.chapter-accordion__meta{grid-column:1;color:var(--blue);font-size:9px;font-weight:800;letter-spacing:.11em;text-transform:uppercase}
.chapter-accordion__title{grid-column:1;font:700 21px/1.05 Georgia,serif}
.chapter-accordion__linked{grid-column:1;color:var(--muted);font-size:11px}
.chapter-accordion>.reference-list{border-top:1px solid var(--line)}
@media(max-width:960px){.book-tabs{top:0}}
@media(max-width:650px){.book-tabs .page{gap:20px;overflow-x:auto}.chapter-accordion>summary{padding:16px}}