/* The Dodeca snapshot supplies the existing SuDu template. These rules only
   compose the new journey within that frame. */
.workspace{grid-template-columns:minmax(0,1fr) 330px;gap:32px}
.start-link{font-size:13px;min-height:44px;text-align:left;text-decoration:underline;text-underline-offset:5px;margin-bottom:5px}
.family-tabs{gap:0;justify-content:space-between;position:sticky;top:0;background:var(--paper);z-index:3}
.family-tabs button{padding:0 7px;min-height:46px;font-size:15px}
.shape-grid{grid-template-columns:repeat(4,minmax(0,1fr));margin:14px 0 20px;gap:5px}
.shape-grid button{min-height:91px;padding:7px 2px;font-size:11.5px}
.shape-grid button svg{width:53px;height:49px;stroke-width:.95}
.shape-grid button span{min-height:32px;line-height:1.3}
.subject-heading h2{font-size:25px;line-height:1.2}
#step-count{font-size:11px;white-space:nowrap;font-variant-numeric:tabular-nums}
.subject-basis{font-size:12px;margin:12px 0 9px}.subject-copy{font-size:15px;line-height:1.55}
.adjustments{margin-top:18px}.adjustments .model-actions{justify-content:flex-start;gap:4px 19px;margin:8px 0 20px}
.range-ends{display:flex;justify-content:space-between;font-size:11px;margin-top:-3px}
#node-control{margin-top:10px}#node-control label{margin:0 0 3px;font-size:12px}#node{font-size:13px;min-height:40px}
.reading-tabs{position:static;gap:24px}.reading-tabs button{font-size:14px;min-height:46px}
.article{font-size:14px;line-height:1.7;padding-top:18px}.article p{margin-bottom:14px}.article-kicker{font-size:11px;margin-bottom:9px;line-height:1.5;opacity:.8}
.source-list a{display:block;padding:11px 0;min-height:44px;font-size:13px;border-bottom:.5px solid var(--line)}.source-list p{font-size:12px;margin-top:15px}
.archive-link{margin-top:8px;font-size:12px}.discovery-dock{padding:8px 0 12px;gap:1px}
.journey-stepper{display:flex;align-items:center;gap:20px;max-width:100%}.journey-stepper button{height:44px;width:44px;flex:none;font-size:24px}.journey-stepper span{font-size:24px;letter-spacing:-.4px;text-align:center;line-height:1.3}
.discovery-next{font-size:15px;min-height:44px;padding:6px 4px}.stage-top{font-size:11px}.stage-top>span:first-child{letter-spacing:.08em}
#touch-hint{font-size:11px;line-height:1.5;margin:11px 0 0}.focus-mode .discovery-next{display:block}.focus-mode .discovery-dock{background:var(--paper)}
.journey-item{display:grid;grid-template-columns:25px 62px minmax(0,1fr) 18px;gap:14px;align-items:center;width:100%;text-align:left;min-height:78px;padding:9px 0;border-bottom:.5px solid var(--line)}
.journey-item svg{width:62px;height:54px;stroke-width:.9}.journey-item strong{font-weight:500;font-size:17px;display:block}.journey-item small{font-size:12px;display:block;margin-top:5px;line-height:1.5}.journey-item>span:first-child{font-size:11px}.journey-item[aria-current=step]{background:var(--faint)}
@media(max-width:1100px){.workspace{grid-template-columns:minmax(0,1fr) 300px;gap:24px}.structures{padding-left:20px}.reading-tabs{gap:20px}.stage-top{flex-direction:column;gap:4px}.stage-top>span:last-child{max-width:100%;text-align:left}}
@media(max-width:760px){
 :root{--header:70px;--tools:52px}
 html,body{height:auto;min-height:100%;overflow-x:hidden;overflow-y:auto}
 .masthead{height:70px}.app-title{font-size:12px;max-width:55%;text-align:right}
 .workspace{position:relative;inset:auto;display:flex;flex-direction:column;padding:70px var(--rail) calc(var(--sudu-tool-footer,52px) + 72px);gap:0}
 .stage{flex:none;height:clamp(380px,64svh,640px);min-height:380px;overflow:hidden}
 .stage-top{inset:8px 0 auto;flex-direction:row;font-size:10px}.stage-top>span:last-child{text-align:right;max-width:45%}
 .structures{max-height:none;overflow:visible;border-top:.5px solid var(--line);padding:0 0 24px;border-left:0}
 .start-link{margin:5px 0}.family-tabs{top:70px;z-index:4;padding:0 4px}.family-tabs button{min-height:48px}
 .shape-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));overflow:visible;gap:4px;margin:12px 0 20px;padding:0}.shape-grid button{flex:none;min-height:88px;padding:4px 1px}.shape-grid button svg{width:56px;height:50px}.shape-grid button span{min-height:32px;font-size:12px}
 .subject-heading h2{font-size:25px}.subject-copy{font-size:15px}.adjustments{margin-top:16px}
 .model-actions button{min-height:44px;font-size:13px}.reading-tabs{position:static}.article{font-size:15px;line-height:1.7}
 .footer{display:flex;height:52px;gap:8px}.footer>span{display:none}.footer-actions{margin-left:auto;gap:12px}.footer-actions button{font-size:12px;min-height:44px}.footer-actions #open-journey{display:none}.footer .view-toolbar{margin:0;gap:1px}.view-toolbar button{width:34px;min-height:44px}#zoom-value{width:34px}
 .journey-stepper{gap:6px}.journey-stepper span{font-size:21px}.journey-stepper button{height:40px}.discovery-next{font-size:14px;min-height:42px}#touch-hint{display:block;font-size:10px;margin-top:8px}
 .workspace.focus-mode{display:block}.focus-mode .stage{height:calc(100svh - 70px - var(--sudu-tool-footer,52px) - 52px);min-height:280px}.focus-mode .structures{display:none}
 .journey-item{grid-template-columns:20px 52px minmax(0,1fr) 16px;gap:8px}.journey-item svg{width:52px}.journey-item strong{font-size:16px}
}
@media(max-width:370px){.view-toolbar button{width:29px}.toolbar-line{margin:0 2px}.shape-grid{grid-template-columns:repeat(3,minmax(0,1fr))}}
@media(max-height:540px) and (orientation:landscape) and (min-width:761px){.discovery-dock{padding-bottom:3px}.journey-stepper span{font-size:18px}.journey-stepper button{height:34px}#touch-hint{display:none}.discovery-next{min-height:34px}.stage-top{inset:2px 0 auto}.workspace{grid-template-columns:minmax(0,1fr) 280px}}

#model{scroll-margin-top:var(--header)}

/* Primary access stays visible while the explanatory panel scrolls. */
.workspace{grid-template-rows:auto minmax(0,1fr);row-gap:0}
.stage{grid-column:1;grid-row:1 / 3}
.solid-access{grid-column:2;grid-row:1;min-width:0;border-left:.5px solid var(--line);padding-left:24px;padding-bottom:8px}
.structures{grid-column:2;grid-row:2;min-height:0}
.dimension-tabs{display:flex;gap:25px;border-bottom:.5px solid var(--line)}
.dimension-tabs button{position:relative;min-height:46px;font-size:15px}
.dimension-tabs button[aria-pressed=true]{font-weight:600}
.dimension-tabs button[aria-pressed=true]:after{content:'';position:absolute;inset:auto 0 -1px;height:2px;background:var(--ink)}
.solid-access h2{font-size:13px;font-weight:500;line-height:1.4;margin:18px 0 3px}
.platonic-grid{grid-template-columns:repeat(3,minmax(0,1fr));margin:5px 0 8px;gap:4px}
.platonic-grid button{min-height:82px;font-size:12px}.platonic-grid button span{min-height:25px}
.more-geometry{border-block:.5px solid var(--line);margin:0 0 21px}
.more-geometry>summary{font-size:13px;line-height:1.45;min-height:44px;align-content:center;cursor:pointer;padding:8px 0}
.more-geometry .family-tabs{position:static}.more-geometry .shape-grid{margin-bottom:14px}
.workspace.focus-mode{grid-template-rows:minmax(0,1fr)}.focus-mode .solid-access{display:none}.focus-mode .stage{grid-area:1/1/2/2}
@media(max-width:1100px){.solid-access{padding-left:20px}}
@media(max-width:760px){
 .solid-access{border-left:0;padding:0 0 8px;order:0}.stage{order:1}.structures{order:2}
 .solid-access h2{margin:10px 0 2px;font-size:12px}.dimension-tabs{gap:28px}.dimension-tabs button{min-height:44px;font-size:14px}
 .platonic-grid{grid-template-columns:repeat(5,minmax(0,1fr));gap:4px;margin:0}.platonic-grid button{min-height:80px;font-size:11px}.platonic-grid button svg{width:42px;height:39px}.platonic-grid button span{font-size:11px;min-height:31px;hyphens:none}
 .more-geometry{margin-top:5px}.stage{height:clamp(340px,57svh,590px);min-height:340px}
}

/* Use the paired Urbanist chevrons from the SuDu homepage. */
.sudu-chevron,.journey-stepper .sudu-chevron{font-family:'Urbanist',sans-serif;font-size:20px;font-weight:700;letter-spacing:-.12em;line-height:1;color:inherit;display:inline-flex;align-items:center;justify-content:center;width:1.2em;height:1.2em;flex:none}
.journey-stepper .sudu-chevron{font-size:30px}
.journey-stepper button{display:inline-flex;align-items:center;justify-content:center}
#previous .sudu-chevron{transform:scaleX(-1)}
.discovery-next,.start-link{display:inline-flex;align-items:center;justify-content:center;gap:10px}
.start-link{justify-content:flex-start}
#next-label{min-width:0}
.journey-item{grid-template-columns:25px 62px minmax(0,1fr) 24px}
@media(max-width:760px){.journey-stepper .sudu-chevron{font-size:26px}.journey-item{grid-template-columns:20px 52px minmax(0,1fr) 24px}}

.pattern-tools{border-block:.5px solid var(--line);padding:4px 0 12px;margin-bottom:14px}
.pattern-tools .model-actions{margin:0 0 3px;gap:4px 18px}
.pattern-tools .control-note{font-size:12px;line-height:1.55;margin:2px 0 0}
#solo{padding-inline-start:14px;position:relative}
#solo:before{content:'';position:absolute;left:0;top:calc(50% - 3px);width:6px;height:6px;border:1px solid var(--ink);border-radius:50%}
#solo[aria-pressed=true]:before{background:var(--ink)}

.construction-steps{display:flex;gap:3px;width:min(100%,430px);margin:0 0 10px;border-bottom:1px solid var(--line)}
.construction-steps button{flex:1;min-width:0;min-height:44px;font-size:12px;padding:4px 2px;position:relative}
.construction-steps button[aria-current=step]{font-weight:600;background:var(--faint)}
.construction-steps button[aria-current=step]:after{content:'';position:absolute;inset:auto 0 -1px;height:2px;background:var(--ink)}
.construction-panel{border-top:1px solid var(--line);margin:18px 0 0;padding-top:15px}
.construction-panel>p{font-size:14px;line-height:1.6;margin:0 0 12px}
.construction-panel .construction-kicker{font-size:11px;letter-spacing:.035em;margin-bottom:8px}
.construction-panel .model-actions{justify-content:space-between;margin:0 0 9px;gap:12px}
.construction-panel .model-actions button{min-height:44px;font-size:13px}
#construction-play{text-decoration:underline;text-underline-offset:5px}
#construction-restart{width:44px;flex:none}#construction-restart .sudu-chevron{transform:scaleX(-1)}
.plane-picker{display:flex;gap:3px;margin:5px 0}.plane-picker button{min-height:44px;min-width:44px;font-size:13px;border-bottom:1px solid var(--line)}
.plane-picker button:first-child{flex:1;text-align:left}.plane-picker button[aria-pressed=true]{border-color:var(--ink);font-weight:600;background:var(--faint)}
.guide-toggle{font-size:12px;min-height:44px;text-decoration:underline;text-underline-offset:5px;opacity:.55}.guide-toggle[aria-pressed=true]{opacity:1}
#construction-ratio{font-size:12px;margin:9px 0 0;line-height:1.5}
.golden-explanation{border-top:1px solid var(--line);margin-top:5px}.golden-explanation summary{font-size:13px;min-height:44px;padding:12px 0;cursor:pointer}
.golden-explanation svg{width:100%;max-width:280px;height:195px;display:block;margin:auto}.golden-explanation p{font-size:13px;line-height:1.6;margin:8px 0 14px}.golden-explanation .golden-formula{text-align:center;font-variant-numeric:tabular-nums}
.construction-panel[hidden],.construction-steps[hidden],#construction-plane-tools[hidden]{display:none}
@media(max-width:760px){.construction-steps{margin-bottom:4px}.construction-steps button{font-size:11px}.stage:has(.construction-steps:not([hidden])){height:clamp(440px,70svh,680px);min-height:440px}.construction-panel>p{font-size:15px}}