:root{--font-base:16px;--text-hero:3.5rem;--text-score:5rem;--font-family:"Helvetica Neue", Arial, system-ui, sans-serif;--text-micro:.8125rem;--text-caption:1.0625rem;--text-body:1.25rem;--text-label:1.125rem;--text-title:1.5rem;--text-heading:2rem;--text-display:2.5rem;--text-page:2.25rem;--text-section:1.75rem;--text-card:1.375rem;--text-question:1.75rem;--text-intro:3.25rem;--text-nav-compact:clamp(.875rem, 4.4cqi, 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var(--space-12)}.journey-layout{display:block}.journey-sidebar{padding-top:0;position:static}.study-steps{gap:var(--space-3);flex-wrap:wrap}.examples>div{gap:var(--space-1);grid-template-columns:1fr}.study-footer .ui-button{white-space:normal}.button-row{flex-direction:column}.choices{grid-template-columns:1fr}.ui-choice{min-height:80px}.exercise-actions{justify-content:space-between;gap:var(--space-2)}}@media (width>=701px) and (width<=860px){.journey-layout{grid-template-columns:minmax(0,1fr)}.journey-sidebar{padding-top:0;position:static}}@media (width<=360px){.app>header nav svg{display:none}.chapter-progress{flex-wrap:wrap}.chapter-progress .ui-progress{flex-basis:100%}}@media (width<=700px){.map-region{padding:var(--space-5) var(--space-3)}.region-heading{gap:var(--space-3)}.region-illustration{width:70px;height:65px}.region-number{width:38px;height:40px}.path-map{--path-max-offset:24px;--path-marker-size:30px}.path-step{--path-offset:clamp(0px, var(--offset), 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solid currentColor}.audio-transcript p:first-child{font-weight:var(--weight-heading)}.audio-control--inline{vertical-align:middle;max-width:100%;margin:0 0 0 var(--space-3);display:inline-flex}.audio-control--inline .audio-button{width:calc(var(--space-10) + var(--space-1));height:calc(var(--space-10) + var(--space-1));padding:var(--space-2)}.audio-control--inline .audio-error{font-weight:400;line-height:1.4}.spoken-text-ending{vertical-align:baseline;align-items:center;gap:var(--space-2);max-width:100%;display:inline-flex}.spoken-text-ending-content{overflow-wrap:anywhere;min-width:0}.spoken-text-ending .audio-control--inline{flex-shrink:0;margin:0}.choice-with-audio{min-width:0;position:relative}.choices>div>.ui-choice{width:100%;height:100%}.choices>.choice-with-audio>.ui-choice{padding-inline-end:calc(var(--space-10) + var(--space-5))}.choice-with-audio>.audio-control{inset-inline-end:var(--space-2);margin:0;position:absolute;top:50%;transform:translateY(-50%)}.choice-with-audio 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