/* Approved chapter treatment; explicit query parameters retain the design comparisons. */
html[data-chapter-review] .silver-review-nav{display:none!important}
html[data-chapter-review] .chapter-design-controls{display:flex;flex-wrap:wrap;gap:12px;padding:18px 0;margin:0 0 24px;border-bottom:1px solid var(--line);font:400 11px/1.4 var(--sans)}
.chapter-design-controls label{display:grid;gap:5px;color:var(--muted);flex:1;min-width:130px}
.chapter-design-controls select{width:100%;min-height:40px;max-width:240px;font:400 13px var(--sans);border:1px solid var(--line);border-radius:8px;padding:8px 10px;color:var(--ink);background:var(--panel)}
html[data-ebrux-silver][data-chapter-variant] .lesson-section{padding:36px 0;scroll-margin-top:95px}
html[data-ebrux-silver][data-chapter-variant] .lesson-section>p{max-width:68ch;font-size:17px;line-height:1.8}
html[data-ebrux-silver][data-chapter-variant] .lesson-section>h2{font-size:40px;line-height:1.12;margin-bottom:22px}
html[data-ebrux-silver][data-chapter-variant] .lesson-section>h3{font-size:29px;line-height:1.2}
html[data-ebrux-silver][data-chapter-variant] .chapter-rail .outline-note{display:none}
html[data-ebrux-silver][data-chapter-variant] .lesson-objective{margin-top:24px;border-left:2px solid var(--silver);padding:15px 20px;background:var(--panel-2);border-radius:0 10px 10px 0}
.lesson-objective>span{display:block;font:500 10px/1.3 var(--sans);letter-spacing:.1em;text-transform:uppercase;color:var(--silver);margin-bottom:7px}
.lesson-objective p{font:400 14px/1.7 var(--sans);margin:0!important;color:var(--ink)}
html[data-ebrux-silver][data-chapter-variant] .chapter-rail nav a{border-left:2px solid transparent;padding:10px 12px;line-height:1.4;border-radius:0 8px 8px 0}
html[data-ebrux-silver][data-chapter-variant] .chapter-rail nav a[aria-current]{border-color:var(--silver);color:var(--ink);background:var(--panel-2)}
html[data-ebrux-silver][data-chapter-variant] .chapter-footer{display:flex;flex-direction:column;align-items:stretch;padding-top:25px;gap:16px}
html[data-ebrux-silver][data-chapter-variant] .chapter-next-card{order:-1;display:grid;grid-template-columns:180px minmax(0,1fr);padding:0;gap:0;background:var(--panel);border:1px solid var(--line);border-radius:14px;overflow:hidden;text-align:left;min-height:180px}
.chapter-next-photo{width:100%;height:100%!important;object-fit:cover}
.chapter-next-copy{display:flex;flex-direction:column;justify-content:center;align-items:flex-start;padding:24px;gap:15px}
.chapter-next-copy small{font:500 10px/1.4 var(--sans);letter-spacing:.09em;text-transform:uppercase;color:var(--silver)}
.chapter-next-copy strong{font:400 32px/1.08 var(--serif);color:var(--ink)}
.chapter-next-copy>span{font:400 13px/1.4 var(--sans);color:var(--ink)}
html[data-ebrux-silver][data-chapter-variant] .chapter-footer>.text-link{align-self:flex-start}
html[data-chapter-variant] .mobile-sections[open] nav{max-height:60svh;overflow-y:auto}
.chapter-section-position{margin-left:auto;margin-right:16px;font-size:10px;color:var(--muted)}

/* 01: same chapter rhythm, tighter proportions and a visible section position. */
html[data-ebrux-silver][data-chapter-variant="1"] .chapter-hero{height:360px}
html[data-ebrux-silver][data-chapter-variant="1"] .chapter-hero-copy h1{font-size:59px}
html[data-ebrux-silver][data-chapter-variant="1"] .trainer-at-work img{height:360px;max-height:360px}
html[data-ebrux-silver][data-chapter-variant="1"] .chapter-layout{gap:40px;grid-template-columns:minmax(0,1fr) 210px}

/* 02: a quieter reading column, compact hero and an always available outline. */
html[data-ebrux-silver][data-chapter-variant="2"] .chapter-layout{display:block}
html[data-ebrux-silver][data-chapter-variant="2"] .chapter-content{max-width:760px;margin-inline:auto}
html[data-ebrux-silver][data-chapter-variant="2"] .chapter-rail{display:none}
html[data-ebrux-silver][data-chapter-variant="2"] .chapter-hero{height:285px}
html[data-ebrux-silver][data-chapter-variant="2"] .chapter-hero-copy{padding:25px}
html[data-ebrux-silver][data-chapter-variant="2"] .chapter-hero-copy h1{font-size:49px;margin:14px 0}
html[data-ebrux-silver][data-chapter-variant="2"] .chapter-hero-copy>p:not(.eyebrow){font:400 17px/1.5 var(--sans)}
html[data-ebrux-silver][data-chapter-variant="2"] .chapter-hero-copy .hero-jump{padding-top:10px}
html[data-ebrux-silver][data-chapter-variant="2"] .mobile-sections{display:block;position:sticky;top:0;z-index:20;margin-top:20px;border-block:1px solid var(--line);background:var(--bg)}
html[data-ebrux-silver][data-chapter-variant="2"] .mobile-sections summary{display:flex;align-items:center;cursor:pointer;min-height:52px;font:400 13px var(--sans)}
html[data-ebrux-silver][data-chapter-variant="2"] .mobile-sections summary:after{content:'+';font-size:22px}
html[data-ebrux-silver][data-chapter-variant="2"] .mobile-sections[open] summary:after{content:'−'}
html[data-ebrux-silver][data-chapter-variant="2"] .mobile-sections nav{display:grid;grid-template-columns:1fr 1fr;gap:4px;padding-bottom:14px}
html[data-ebrux-silver][data-chapter-variant="2"] .mobile-sections nav a{min-height:44px;display:flex;align-items:center;gap:12px;padding:8px 12px;font-size:13px}
html[data-ebrux-silver][data-chapter-variant="2"] .mobile-sections nav a[aria-current]{background:var(--panel-2);border-radius:8px}
html[data-ebrux-silver][data-chapter-variant="2"] .lesson-section>p{font-size:18px;line-height:1.85}
html[data-ebrux-silver][data-chapter-variant="2"] .lesson-section>h2{font-size:39px}

/* 03: studio images earlier in the lesson and a softer card rhythm. */
html[data-ebrux-silver][data-chapter-variant="3"] .chapter-layout{grid-template-columns:minmax(0,1fr) 185px;gap:30px}
html[data-ebrux-silver][data-chapter-variant="3"] .chapter-hero{height:390px}
html[data-ebrux-silver][data-chapter-variant="3"] .chapter-hero-copy h1{font-size:60px}
html[data-ebrux-silver][data-chapter-variant="3"] .lesson-section:not(.existing-legal){background:var(--panel);border:1px solid var(--line);border-radius:16px;padding:28px;margin-block:26px}
html[data-ebrux-silver][data-chapter-variant="3"] #ebru{display:grid;grid-template-columns:minmax(0,1fr) .85fr;column-gap:26px}
html[data-ebrux-silver][data-chapter-variant="3"] #ebru>*{grid-column:1}
html[data-ebrux-silver][data-chapter-variant="3"] #ebru>.trainer-at-work{grid-column:2;grid-row:3/span 5;margin:0 0 22px!important;align-self:stretch}
html[data-ebrux-silver][data-chapter-variant="3"] #ebru>.trainer-at-work img{height:100%;min-height:320px;max-height:680px;object-position:50% 55%}
html[data-ebrux-silver][data-chapter-variant="3"] #ebru>:is(h3,blockquote,p:last-child){grid-column:1/-1}
html[data-ebrux-silver][data-chapter-variant="3"] #ebru .milestones{grid-template-columns:1fr;gap:18px}

/* Three bottom navigation treatments, retaining the original links and handlers. */
html[data-chapter-navigation] #ebrux-uni-nav .eb-uni-label{font:400 12px/1.3 var(--sans)!important;letter-spacing:0;text-transform:none}
html:is([data-ebrux-silver],[data-ebrux-academy])[data-chapter-navigation] #ebrux-uni-nav .eb-uni-active{border:0!important;background:transparent!important}
html[data-chapter-navigation] #ebrux-uni-nav .eb-uni-stack{min-height:44px;border:0!important;background:transparent;border-radius:14px;flex:1;padding:7px 10px;gap:3px}
html[data-chapter-navigation] #ebrux-uni-nav .eb-uni-ico{width:24px;height:24px}
html[data-chapter-navigation] #ebrux-uni-nav .eb-uni-row{max-width:520px;padding:7px;gap:5px}
html[data-chapter-navigation] #ebrux-uni-nav [aria-current=page]{background:var(--note-bg)!important;color:var(--note-ink)!important}
html[data-chapter-navigation] #ebrux-uni-nav [aria-current=page] :is(.eb-uni-label,.eb-uni-lit,.eb-uni-on){color:var(--note-ink)!important;stroke:var(--note-ink)!important}
html[data-chapter-navigation="1"] #ebrux-uni-nav{left:50%;right:auto;bottom:max(12px,env(safe-area-inset-bottom));width:min(440px,calc(100% - 24px));transform:translateX(-50%);border:1px solid var(--line)!important;border-radius:25px;box-shadow:0 8px 30px #0002!important}
html[data-chapter-navigation="2"] #ebrux-uni-nav{background:var(--bg)!important;border-top:1px solid var(--line)!important}
html[data-chapter-navigation="2"] #ebrux-uni-nav .eb-uni-row{max-width:900px;gap:14px;padding:8px 20px}
html[data-chapter-navigation="2"] #ebrux-uni-nav .eb-uni-stack{flex-direction:row;justify-content:center;gap:10px;border-radius:0;padding-block:12px}
html[data-chapter-navigation="2"] #ebrux-uni-nav [aria-current=page]{background:transparent!important;border-top:2px solid var(--silver)!important}
html[data-chapter-navigation="2"] #ebrux-uni-nav [aria-current=page] :is(.eb-uni-label,.eb-uni-lit,.eb-uni-on){color:var(--ink)!important;stroke:var(--ink)!important}
html[data-chapter-navigation="3"] #ebrux-uni-nav{left:50%;right:auto;bottom:max(14px,env(safe-area-inset-bottom));width:310px;max-width:calc(100% - 30px);transform:translateX(-50%);border:1px solid var(--line)!important;border-radius:22px}
html[data-chapter-navigation="3"] #ebrux-uni-nav .eb-uni-row{gap:4px;padding:6px}
html[data-chapter-navigation="3"] #ebrux-uni-nav .eb-uni-stack{flex-direction:row;justify-content:center;gap:7px;padding:10px 12px}
html[data-chapter-navigation="3"] #ebrux-uni-nav .eb-uni-stack:not([aria-current]) .eb-uni-label{display:none}
html[data-chapter-navigation="3"] #ebrux-uni-nav .eb-uni-stack[aria-current]{flex:1.7}

/* Chapter pickers use the original course/access renderer; only their presentation changes. */
html[data-chapter-picker] .eb-uni-sheet-panel{box-shadow:0 18px 70px #0003!important;border:1px solid var(--line)!important;border-radius:20px;background:var(--panel)!important;max-height:calc(100svh - 125px)}
html[data-chapter-picker] .eb-uni-sheet-panel-inner{padding:24px;overflow:hidden}
html[data-chapter-picker] .eb-uni-sheet-body{display:flex;flex-direction:column;min-height:0}
html[data-chapter-picker] .eb-uni-sheet-close{top:12px;right:12px;width:44px;height:44px;background:var(--panel-2);color:var(--ink)!important;border-radius:50%}
html[data-chapter-picker] .eb-uni-sheet-progress{margin:0 54px 5px 0}
html[data-chapter-picker] .eb-uni-sheet-progress-head{font:400 11px/1.4 var(--sans);letter-spacing:0;text-transform:none;color:var(--muted)!important}
html[data-chapter-picker] .eb-uni-sheet-progress-head span:last-child{color:var(--muted)!important;letter-spacing:0}
html:is([data-ebrux-silver],[data-ebrux-academy])[data-chapter-navigation][data-chapter-picker] .eb-uni-sheet-kicker{font:400 30px/1.1 var(--serif)!important;letter-spacing:0;text-transform:none;color:var(--ink)!important;margin:22px 0}
.chapter-picker-course{display:block;font:400 11px/1.4 var(--sans);color:var(--muted);margin-top:7px}
html[data-chapter-picker] .eb-uni-sheet-list{padding:2px 5px 10px 2px;max-height:none;overflow-y:auto;overscroll-behavior:contain;scrollbar-width:thin;scrollbar-color:var(--silver-low) transparent}
html[data-chapter-picker] .eb-uni-sheet-list li{margin-bottom:10px}
html:is([data-ebrux-silver],[data-ebrux-academy])[data-chapter-picker] .eb-uni-sheet-row{position:relative;min-height:78px;padding:10px;gap:14px;border:1px solid var(--line)!important;background:var(--bg)!important;border-radius:12px}
html:is([data-ebrux-silver],[data-ebrux-academy])[data-chapter-picker] .eb-uni-sheet-row--current{border-color:var(--silver)!important;background:var(--panel-2)!important}
html[data-chapter-picker] .chapter-picker-photo{width:78px;height:66px!important;object-fit:cover;border-radius:7px;flex:none}
html[data-chapter-picker] [data-order="1"] .chapter-picker-photo{object-position:50% 20%}
html[data-chapter-picker] .eb-uni-sheet-num{display:none}
html[data-chapter-picker] .eb-uni-sheet-title{font:400 23px/1.12 var(--serif)!important;color:var(--ink)!important}
html[data-chapter-picker] .eb-uni-sheet-check{color:var(--silver);width:24px;height:24px}
html[data-chapter-picker] .eb-uni-sheet-check svg{color:var(--silver);stroke:var(--silver)}
html[data-chapter-picker] .eb-uni-sheet-check svg :is(path,rect,circle){stroke:currentColor}
html[data-chapter-picker] .eb-uni-sheet-foot{margin:12px 0 0;padding-top:15px;border-color:var(--line)}
html[data-chapter-picker] .eb-uni-sheet-foot a{display:flex;min-height:36px;align-items:center;justify-content:center;font:400 12px/1.4 var(--sans);letter-spacing:0;text-transform:none;color:var(--ink)!important}
html[data-chapter-picker="1"] .eb-uni-sheet-panel{width:min(630px,calc(100% - 28px));max-width:630px;bottom:105px;left:50%;right:auto;transform:translate(-50%,104%)}
html[data-chapter-picker="1"] #eb-uni-sheet-root.eb-uni-sheet-open .eb-uni-sheet-panel{transform:translate(-50%,0)}
html[data-chapter-picker="2"] .eb-uni-sheet-panel{left:auto;right:20px;top:20px;bottom:105px;width:min(440px,calc(100% - 40px));max-width:440px;max-height:none;transform:translateX(105%)}
html[data-chapter-picker="2"] #eb-uni-sheet-root.eb-uni-sheet-open .eb-uni-sheet-panel{transform:translateX(0)}
html:is([data-ebrux-silver],[data-ebrux-academy])[data-chapter-picker="2"] .eb-uni-sheet-row{border-width:0 0 1px!important;border-radius:0;padding:14px 0;background:transparent!important}
html[data-chapter-picker="2"] .chapter-picker-photo{width:88px;height:82px!important;border-radius:10px}
html[data-chapter-picker="2"] .eb-uni-sheet-row--current{border-color:var(--silver)!important}
html[data-chapter-picker="3"] .eb-uni-sheet-panel{width:min(940px,calc(100% - 30px));max-width:940px;bottom:105px;left:50%;right:auto;transform:translate(-50%,104%)}
html[data-chapter-picker="3"] #eb-uni-sheet-root.eb-uni-sheet-open .eb-uni-sheet-panel{transform:translate(-50%,0)}
html[data-chapter-picker="3"] .eb-uni-sheet-list{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:14px}
html[data-chapter-picker="3"] .eb-uni-sheet-list li{margin:0;min-width:0}
html:is([data-ebrux-silver],[data-ebrux-academy])[data-chapter-picker="3"] .eb-uni-sheet-row{display:flex;flex-direction:column;align-items:stretch;padding:0;gap:0;height:100%;overflow:hidden}
html[data-chapter-picker="3"] .chapter-picker-photo{width:100%;height:auto!important;aspect-ratio:4/3;object-fit:cover;border-radius:0}
html[data-chapter-picker="3"] .eb-uni-sheet-num{display:grid;position:absolute;top:10px;left:10px;background:var(--note-bg);color:var(--note-ink);border:0;border-radius:5px;width:28px;height:27px;font:500 10px var(--sans)}
html[data-chapter-picker="3"] .eb-uni-sheet-main{padding:14px;min-height:82px;flex:1}
html[data-chapter-picker="3"] .eb-uni-sheet-title{font-size:23px!important}
html[data-chapter-picker="3"] .eb-uni-sheet-check{position:absolute;top:10px;right:10px;border-radius:50%;background:var(--panel);width:26px;height:26px}
@media(prefers-reduced-motion:reduce){html[data-chapter-picker] :is(.eb-uni-sheet-panel,.eb-uni-sheet-backdrop){transition:none!important}}
@media(max-width:740px){
  html[data-chapter-review] .chapter-design-controls{gap:8px;margin-bottom:18px;padding-top:15px}
  .chapter-design-controls label{min-width:0;font-size:10px}
  .chapter-design-controls select{font-size:11px;padding:7px 4px;min-height:44px}
  html[data-ebrux-silver][data-chapter-variant] .chapter-layout{display:block}
  html[data-ebrux-silver][data-chapter-variant] .chapter-rail{display:none}
  html[data-ebrux-silver][data-chapter-variant] .chapter-hero>img{height:190px;object-position:50% 52%!important}
  html[data-ebrux-silver][data-chapter-variant] .chapter-hero-copy{padding:22px!important}
  html[data-ebrux-silver][data-chapter-variant] .chapter-hero-copy h1{font-size:43px!important}
  html[data-ebrux-silver][data-chapter-variant] .chapter-hero-copy>p:not(.eyebrow){font-size:19px!important}
  html[data-ebrux-silver][data-chapter-variant] .lesson-section>h2{font-size:35px}
  html[data-ebrux-silver][data-chapter-variant] .lesson-section{padding-block:30px}
  html[data-ebrux-silver][data-chapter-variant] .mobile-sections{position:sticky;top:0;z-index:20;background:var(--bg)}
  html[data-ebrux-silver][data-chapter-variant] .chapter-next-card{grid-template-columns:35% minmax(0,1fr);min-height:174px}
  .chapter-next-copy{padding:18px;gap:14px}.chapter-next-copy strong{font-size:26px}.chapter-next-copy small{font-size:9px}
  html[data-ebrux-silver][data-chapter-variant="2"] .chapter-hero>img{height:150px}
  html[data-ebrux-silver][data-chapter-variant="2"] .chapter-hero-copy h1{font-size:39px!important}
  html[data-ebrux-silver][data-chapter-variant="2"] .chapter-hero-copy>p:not(.eyebrow){font:400 15px/1.6 var(--sans)!important}
  html[data-ebrux-silver][data-chapter-variant="2"] .mobile-sections nav{grid-template-columns:1fr}
  html[data-ebrux-silver][data-chapter-variant="3"] #ebru{display:block}
  html[data-ebrux-silver][data-chapter-variant="3"] .lesson-section:not(.existing-legal){padding:23px;margin-block:22px}
  html[data-ebrux-silver][data-chapter-variant="3"] #ebru>.trainer-at-work{margin:20px 0!important}
  html[data-ebrux-silver][data-chapter-variant="3"] #ebru>.trainer-at-work img{height:260px;min-height:0;max-height:none}
  html[data-chapter-navigation="2"] #ebrux-uni-nav .eb-uni-row{padding:5px 10px;gap:6px}
  html[data-chapter-navigation="2"] #ebrux-uni-nav .eb-uni-stack{flex-direction:column;gap:4px;padding:8px 4px}
  html[data-chapter-picker] .eb-uni-sheet-panel-inner{padding:20px 16px}
  html[data-chapter-picker] .eb-uni-sheet-kicker{font-size:24px;margin-block:18px}
  html[data-chapter-picker] .eb-uni-sheet-title{font-size:21px!important}
  html[data-chapter-picker="2"] .eb-uni-sheet-panel{right:12px;top:12px;width:calc(100% - 24px);bottom:100px}
  html[data-chapter-picker="3"] .eb-uni-sheet-list{grid-template-columns:repeat(2,minmax(0,1fr));gap:10px}
  html[data-chapter-picker="3"] .eb-uni-sheet-main{padding:12px;min-height:88px}
  html[data-chapter-picker="3"] .eb-uni-sheet-title{font-size:21px!important;overflow-wrap:anywhere}
}