/* Learning surfaces share the site directory; layout follows available width. */
/* Inherit the reading palette so the HUD, directory and content stay continuous.
   Shared tokens include light, dark and system-theme variants. */
.learning-shell {
  --atlas-bg:var(--reading-bg); --atlas-panel:var(--reading-bg);
  --atlas-ink:var(--site-default-fg-color); --atlas-muted:var(--site-default-fg-color--light);
  --atlas-line:var(--reading-rule); --atlas-hover:var(--reading-surface);
  color:var(--atlas-ink); background:var(--atlas-bg);
  min-height:calc(100dvh - var(--site-header-height));
  font-family:inherit; font-size:14px; line-height:1.6; isolation:isolate;
}
[data-color=sage]{--field:#47765c;--field-soft:#e7eee3;--field-art:#b6c8ab}
[data-color=blue]{--field:#44738a;--field-soft:#e6eef1;--field-art:#b1cad8}
[data-color=iris]{--field:#7b6597;--field-soft:#ede8f1;--field-art:#c9bbdc}
[data-color=clay]{--field:#a46d52;--field-soft:#f3e9e0;--field-art:#d8b99c}
[data-color=gold]{--field:#947641;--field-soft:#f1eddf;--field-art:#d4c394}
[data-theme=dark] [data-color=sage]{--field:#a4c29d;--field-soft:#2b3b30;--field-art:#4d664e}
[data-theme=dark] [data-color=blue]{--field:#9ec3d3;--field-soft:#283b40;--field-art:#405e67}
[data-theme=dark] [data-color=iris]{--field:#c1aad7;--field-soft:#38323f;--field-art:#5f506d}
[data-theme=dark] [data-color=clay]{--field:#d9b293;--field-soft:#40372e;--field-art:#75604c}
[data-theme=dark] [data-color=gold]{--field:#d4c18e;--field-soft:#3c3b2c;--field-art:#6e6748}
.learning-main{padding:0!important;margin:0!important;max-width:none!important;min-width:0;flex:1}
body:has(.learning-main) {
  --learning-workspace-max: var(--collection-frame-width);
  --learning-page-gutter: var(--collection-gutter);
}
.learning-shell [data-color]{--field:var(--reading-accent);--field-soft:var(--nav-active);--field-art:var(--reading-rule)}
.learning-shell *{box-sizing:border-box}
.learning-shell [hidden]{display:none!important}
.learning-shell :is(a,button){-webkit-tap-highlight-color:transparent}
.learning-shell a{color:inherit;text-decoration:none}
.learning-shell button{font:inherit;cursor:pointer}
.learning-shell :is(a,button,summary):focus-visible{outline:2px solid var(--reading-accent);outline-offset:3px}
.learning-shell svg{width:24px;height:24px;display:block}
.learning-shell :is(h1,h2,h3,p){margin:0}
.learning-shell button:disabled{cursor:wait;opacity:.5}
.learn-workspace{padding:36px max(var(--learning-page-gutter),env(safe-area-inset-right)) 48px max(var(--learning-page-gutter),env(safe-area-inset-left));max-width:var(--learning-workspace-max);min-width:0;width:100%;margin:auto;container-type:inline-size;overflow-anchor:none}

/* A compact introduction leaves the first collection in view. */
.learn-hero{position:relative;display:flex;align-items:center;padding:0 0 24px;min-height:0;border:0;border-bottom:1px solid var(--atlas-line);background:transparent}

.learn-hero__copy{position:relative;min-width:0;max-width:100%}
.learn-eyebrow{display:flex;align-items:center;gap:10px;font-size:10px;color:var(--atlas-muted);letter-spacing:0;margin-bottom:9px}
.learn-eyebrow>span{opacity:.6}
.learn-hero h1{font-size:36px;line-height:1.25;font-weight:600;letter-spacing:-.025em}
.learn-hero p{font-size:16px;color:var(--atlas-muted);margin-top:10px;line-height:1.7;max-width:640px}
.learn-hero__stats{display:flex;flex-wrap:wrap;gap:24px;margin-top:17px}
.learn-hero__stats>span{display:flex;align-items:baseline;gap:7px;font-size:12px;color:var(--atlas-muted)}
.learn-hero__stats strong{font-size:14px;font-weight:600;color:var(--atlas-ink);font-variant-numeric:tabular-nums}
.learn-hero--series{min-height:0;padding-right:88px}
.learn-hero__actions{display:flex;flex-wrap:wrap;gap:10px;margin-top:18px;align-items:center}
.learn-primary,.learn-follow{display:inline-flex;align-items:center;justify-content:center;min-height:40px;border-radius:var(--site-radius);font-size:13px!important;line-height:1.5}
.learn-primary{gap:18px;padding:8px 15px;border:1px solid transparent;background:var(--atlas-ink);color:var(--atlas-panel)}
.learning-shell .learn-primary{background:var(--atlas-ink);color:var(--atlas-panel)}
.learn-primary:hover{background:color-mix(in srgb,var(--atlas-ink) 88%,var(--atlas-panel))}
.learn-follow{gap:8px;padding:8px 12px 8px 8px;border:0;color:var(--atlas-muted);background:transparent}
.learn-follow__mark{display:grid;place-items:center;width:22px;height:22px;flex-shrink:0;border:1px solid color-mix(in srgb,var(--atlas-muted) 55%,var(--atlas-panel));border-radius:var(--site-radius);transition:background 160ms ease,border-color 160ms ease,transform 160ms ease,color 160ms ease}
.learning-shell .learn-follow__mark svg{width:14px;height:14px}
.learn-follow__plus,.learn-follow__check{stroke:currentColor;stroke-width:1.7;stroke-linecap:round;stroke-linejoin:round}
.learn-follow__plus{transform-box:fill-box;transform-origin:center;transition:opacity 140ms ease,transform 200ms ease}
.learn-follow__check{stroke-dasharray:1;stroke-dashoffset:1;opacity:0}
.learn-follow__copy{display:grid;text-align:start}
.learn-follow__copy>span{grid-area:1/1}
.learn-follow:not([aria-pressed=true]) .learn-follow__copy>span:last-child,
.learn-follow[aria-pressed=true] .learn-follow__copy>span:first-child{visibility:hidden}
.learn-follow[aria-pressed=true]{color:var(--field)}
.learn-follow[aria-pressed=true] .learn-follow__mark{background:var(--field-soft);border-color:var(--field);color:var(--field)}
.learn-follow[aria-pressed=true] .learn-follow__plus{opacity:0;transform:rotate(90deg) scale(.45)}
.learn-follow[aria-pressed=true] .learn-follow__check{stroke-dashoffset:0;opacity:1;transition:stroke-dashoffset 280ms 40ms cubic-bezier(.22,1,.36,1),opacity 120ms 40ms}
.learn-follow:active .learn-follow__mark{transform:scale(.94)}
@media(hover:hover) and (pointer:fine){
 .learn-follow:hover{color:var(--atlas-ink)}
 .learn-follow:hover .learn-follow__mark{border-color:var(--atlas-ink);color:currentColor}
 .learn-follow[aria-pressed=true]:hover{color:var(--field)}
 .learn-follow[aria-pressed=true]:hover .learn-follow__mark{border-color:var(--field);color:var(--field)}
}
.learn-series-emblem{position:absolute;width:56px;height:56px;right:0;top:0;display:grid;place-items:center;color:var(--atlas-muted);pointer-events:none}
.learn-series-emblem>svg{width:48px;height:48px}

/* The atlas is sized by its content container, independent of orientation. */
.learn-browser-bar{display:flex;align-items:center;justify-content:space-between;gap:12px;margin:22px 0 14px;overflow-anchor:none}
.learn-filters{position:relative;display:flex;flex-wrap:wrap;gap:5px;isolation:isolate}
.learn-filters::before{content:'';box-sizing:border-box;position:absolute;left:0;top:0;width:var(--tab-width,0px);height:var(--tab-height,0px);transform:translate(var(--tab-x,0px),var(--tab-y,0px));border-radius:var(--site-radius);background:var(--nav-active);pointer-events:none;z-index:0;opacity:0}
.learn-filters[data-tab-selected=true]::before{opacity:1}
.learn-filters[data-tab-selected=false]::before{display:none}
.learn-filters[data-tab-motion=true]::before{transition:transform .28s cubic-bezier(.22,1,.36,1),width .28s cubic-bezier(.22,1,.36,1),height .28s cubic-bezier(.22,1,.36,1),opacity .12s}
.learn-filters button{position:relative;z-index:1;font-size:12px;border:1px solid transparent;background:transparent;color:var(--atlas-muted);border-radius:var(--site-radius);padding:8px 11px;transition:color 160ms,background 150ms}
.learn-filters button:hover{background:var(--atlas-hover)}
.learn-filters button.is-active{background:var(--nav-active);color:var(--reading-accent);border-color:transparent}
.learn-filters[data-tab-selected] button:hover{background:transparent;color:var(--atlas-ink)}
.learn-filters[data-tab-selected] button.is-active{background:transparent;color:var(--reading-accent)}
.learn-collection-count{font-size:12px;color:var(--atlas-muted);white-space:nowrap}
.learn-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(min(100%,280px),1fr));align-content:start;gap:14px;overflow-anchor:none}
.learn-card{display:flex;flex-direction:column;gap:12px;padding:20px;background:var(--atlas-panel);border:1px solid var(--atlas-line);border-radius:var(--site-radius-lg);box-shadow:none;transition:border-color 160ms ease;position:relative;overflow:hidden}
/* Lay out distant cards as they approach the viewport. Remember their actual
   height after first paint so returning to them keeps the scroll position. */
.learn-card{content-visibility:auto;contain-intrinsic-block-size:auto 240px}
@media(hover:hover) and (pointer:fine){
 .learn-card:hover{border-color:color-mix(in srgb,var(--field) 55%,var(--atlas-line))}
 .learn-card:hover h2,.learn-card:hover .learn-card__enter{color:var(--field)}
}
.learn-card:focus-visible{border-color:var(--field)}
.learn-card__top{display:flex;align-items:center;gap:12px;min-height:42px}
.learn-icon{display:grid;place-items:center;color:var(--atlas-muted);width:28px;height:32px;flex-shrink:0}
.learn-icon svg{width:28px;height:28px}
.learn-card h2{transition:color 160ms ease;font-size:19px;font-weight:600;line-height:1.4;letter-spacing:0}
.learn-card p{font-size:15px;color:var(--atlas-muted);line-height:1.7}
.learn-card__topics{display:flex;gap:6px 12px;flex-wrap:wrap;margin-top:1px}
.learn-card__topics:empty{display:none}
.learn-card__topics>span{font-size:12px;color:var(--atlas-muted);max-width:100%;overflow-wrap:anywhere}
.learn-card__foot{display:flex;justify-content:space-between;align-items:center;margin-top:auto;padding-top:3px;font-size:12px;color:var(--atlas-muted)}
.learn-card__enter{transition:color 160ms ease;color:var(--atlas-muted);font-size:18px;line-height:1}
.learn-track{height:3px;background:var(--atlas-line);border-radius:var(--site-radius);overflow:hidden}
.learn-track>span{display:block;height:100%;width:0;background:var(--reading-accent);border-radius:inherit;transition:width 250ms ease}
.learn-card>.learn-track{margin-top:-4px}
.learn-mid-dot{margin:0 9px;opacity:.5}

/* Topics read down the page. A fixed heading column prevents uneven card holes. */
.learn-series-progress{display:flex;gap:24px;align-items:center;padding:17px 0;border-bottom:1px solid var(--atlas-line)}
.learn-series-progress>div:first-child{display:flex;gap:10px;align-items:center;flex-wrap:wrap}
.learn-series-progress strong{font-weight:500;font-size:13px}
.learn-series-progress [data-series-detail]{color:var(--atlas-muted);font-size:12px;margin-left:8px}
.learn-small-icon{font-size:21px;color:var(--atlas-muted)}
.learn-series-progress .learn-track{flex:1}
.learn-section-heading{display:flex;align-items:center;justify-content:space-between;gap:16px;margin:24px 0 14px}
.learn-section-heading h2{font-size:19px;font-weight:600}
.learn-section-heading>span{font-size:12px;color:var(--atlas-muted)}
.learn-topics{display:grid;grid-template-columns:1fr;gap:14px}
.learn-topic{display:grid;grid-template-columns:180px minmax(0,1fr);border:0;border-top:1px solid var(--atlas-line);background:var(--atlas-panel);border-radius:0;overflow:hidden}
.learn-topic>header{display:flex;flex-direction:column;align-items:flex-start;gap:10px;padding:20px 20px 20px 0;background:transparent}
.learn-topic__number{font-size:12px;font-weight:600;color:var(--field);font-variant-numeric:tabular-nums;letter-spacing:.08em}
.learn-topic h3{font-size:16px;font-weight:600;line-height:1.6}
.learn-topic__progress{margin-top:auto;padding-top:4px;width:100%;max-width:180px}
.learn-topic__progress>span{font-size:11px;color:var(--atlas-muted)}
.learn-topic__progress .learn-track{margin-top:8px}
.learn-topic ol{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));align-content:start;gap:2px 14px;padding:10px 14px;margin:0;list-style:none}
.learn-lesson{display:flex;align-items:stretch;border-radius:var(--site-radius);transition:background 150ms;min-width:0}
@media(hover:hover) and (pointer:fine){.learn-lesson:hover{background:color-mix(in srgb,var(--atlas-ink) 4%,var(--atlas-panel))}}
.learn-lesson>a{display:flex;align-items:center;gap:10px;flex:1;min-width:0;padding:12px 5px;font-size:15px;line-height:1.6;overflow-wrap:anywhere}
.learn-lesson__number{font-size:10px;color:var(--atlas-muted);opacity:.65;flex-shrink:0;min-width:16px;font-variant-numeric:tabular-nums}
.learn-lesson__arrow{margin-left:auto;color:var(--atlas-muted);font-size:12px;opacity:.4}
.learn-lesson:hover .learn-lesson__arrow{opacity:1;color:var(--field)}
.learn-check{width:36px;min-height:44px;flex-shrink:0;background:none;border:0;color:var(--atlas-muted);display:grid;place-items:center}
.learn-check svg{width:20px;height:20px;padding:2px;border:1px solid color-mix(in srgb,var(--atlas-muted) 60%,var(--atlas-panel));border-radius:var(--site-radius);fill:none;stroke:var(--atlas-muted);stroke-width:1.8;stroke-opacity:0;transition:background 150ms,border-color 150ms}
.learn-check:hover svg{stroke-opacity:1;border-color:var(--field);background:var(--field-soft)}
.learn-lesson.is-complete .learn-check svg{background:var(--field-soft);border-color:var(--field);stroke:var(--field);stroke-opacity:1}
.learn-lesson.is-complete .learn-lesson__number{color:var(--field);opacity:1}
.learn-topic.is-complete{border-color:var(--field-art)}
.learn-source{margin-top:24px;border:1px solid var(--atlas-line);border-radius:var(--site-radius);padding:18px;background:var(--atlas-panel)}
.learn-source summary{cursor:pointer}
.learn-source .site-body{margin:24px auto;max-width:800px}
.learn-guide.site-content{max-width:800px;margin:40px auto 0;padding:0;min-width:0}

.learn-personal{margin-top:26px}
.learn-empty{padding:16px 0;border-top:1px solid var(--atlas-line);color:var(--atlas-muted);font-size:14px}
.learn-followed-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(min(100%,260px),1fr));gap:12px}
.learn-followed-card{display:block;padding:16px;border:1px solid var(--atlas-line);background:var(--atlas-panel);border-radius:var(--site-radius)}
.learn-followed-card strong{display:block;font-size:14px;font-weight:550}
.learn-followed-card small{display:block;font-size:12px;color:var(--atlas-muted);margin:5px 0 10px}
.learn-resume{margin-top:16px;display:flex;align-items:center;gap:16px;padding:14px 16px;border:0;border-radius:var(--site-radius);background:var(--atlas-hover)}
.learn-resume>div{flex:1;min-width:0;display:flex;align-items:baseline;gap:14px}
.learn-resume small{font-size:12px;color:var(--atlas-muted);flex-shrink:0}
.learn-resume strong{font-size:14px;font-weight:550}
.learn-resume>a{font-size:12px;white-space:nowrap}

@container(max-width:900px){
 .learn-topic{grid-template-columns:160px minmax(0,1fr)}
 .learn-topic>header{padding:18px}
 .learn-topic ol{grid-template-columns:1fr}
}
@container(max-width:600px){
 .learn-hero{padding:0 0 20px;min-height:0}
 .learn-hero__copy{max-width:100%}
 .learn-hero h1{font-size:28px}
 .learn-hero p{font-size:15px}
 .learn-eyebrow{font-size:12px}
 .learn-hero__stats{gap:18px;margin-top:16px}
 .learn-series-emblem{display:none}
 .learn-browser-bar{margin-top:18px;display:block}
 .learn-collection-count{display:none}
 .learn-grid{grid-template-columns:1fr;gap:12px}
 .learn-card{padding:16px 18px;gap:9px}
 .learn-topic{grid-template-columns:1fr}
 .learn-topic>header{display:grid;grid-template-columns:24px minmax(0,1fr) auto;align-items:center;gap:10px;padding:14px 16px;border-right:0;border-bottom:1px solid var(--atlas-line)}
 .learn-topic h3{font-size:15px}
 .learn-topic__progress{margin:0;padding:0;max-width:90px;width:auto;min-width:64px}
 .learn-topic__progress>span{font-size:10px}
 .learn-topic__progress .learn-track{margin-top:5px}
 .learn-topic ol{padding:8px 10px}
 .learn-lesson>a{padding:12px 5px;font-size:14px}
 .learn-check{width:44px}
 .learn-primary,.learn-follow,.learn-filters button{min-height:44px}
 .learn-filters{gap:3px}
 .learn-filters button{padding:8px 10px}
 .learn-series-progress{display:block;padding-block:14px}
 .learn-series-progress>.learn-track{margin-top:10px}
 .learn-series-progress [data-series-detail]{margin-left:auto}
 .learn-section-heading{margin:20px 0 12px;gap:10px}
 .learn-section-heading h2{font-size:18px}
 .learn-section-heading>span{font-size:11px}
 .learn-resume>div{display:block}
 .learn-resume strong{display:block;margin-top:2px}
}
@media(max-width:600px){.learn-workspace{padding-top:24px;padding-bottom:32px}}
@media(prefers-reduced-motion:reduce){.learning-shell *, .learning-shell *:before{transition:none!important;animation:none!important}}

/* Explorer: clear separation between personal reading, navigation and collections. */
.learning-shell--explorer{--explorer-serif:Georgia,'Times New Roman',serif;--explorer-sage:#72856b}
.learning-shell--explorer .learn-workspace{max-width:var(--collection-frame-width);padding-top:28px;padding-bottom:48px;display:grid;grid-template-columns:minmax(0,1fr);row-gap:28px}
.learning-shell--explorer .learn-browser-bar{margin:0;scroll-margin-top:90px}
.learning-shell--explorer .learn-filters{gap:4px}
.learning-shell--explorer .learn-filters button{font-size:11px;padding:8px 12px;border-radius:3px;min-height:42px}
.learning-shell--explorer .learn-filters::before{border-radius:3px;background:color-mix(in srgb,var(--explorer-sage) 14%,var(--atlas-bg))}
.learning-shell--explorer .learn-filters button.is-active{color:var(--atlas-ink)}
.learning-shell--explorer .explorer-fields{display:block}
.explorer-field{--section-tone:#7b8e72}
.explorer-field[data-explorer-field=systems]{--section-tone:#708b9b}
.explorer-field[data-explorer-field=theory]{--section-tone:#998368}
.explorer-field[data-explorer-field=culture]{--section-tone:#a17a77}
.explorer-field[data-explorer-field=practice]{--section-tone:#818977}
.explorer-field+.explorer-field{margin-top:40px}
.explorer-field-heading{display:flex;align-items:baseline;gap:22px;margin-bottom:16px}
.explorer-field-title{min-width:0}
.explorer-field-heading h2{font-family:var(--explorer-serif);font-size:27px;font-weight:400;line-height:1.3;letter-spacing:-.035em}
.explorer-section-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px}
.learning-shell--explorer .learn-card{display:grid;grid-template-columns:85px minmax(0,1fr);padding:0;gap:0;min-height:145px;border-radius:4px;content-visibility:visible;contain-intrinsic-block-size:none;transition:border-color .18s,box-shadow .18s}
.explorer-card-art{position:relative;display:flex;align-items:center;justify-content:center;align-self:stretch;color:var(--section-tone);background:color-mix(in srgb,var(--section-tone) 11%,var(--atlas-bg));overflow:hidden}
.explorer-card-art::before{content:'';width:106px;height:106px;border:1px solid currentColor;opacity:.13;position:absolute;left:27px;top:39px;border-radius:50%}
.explorer-card-art::after{content:'';width:87px;height:87px;border:1px solid currentColor;opacity:.1;position:absolute;left:36px;top:48px;border-radius:50%}
.learning-shell--explorer .explorer-card-art svg{width:43px;height:43px;position:relative;z-index:1;stroke-width:1.25;transition:transform .22s ease}
.explorer-card-art-line{position:absolute;bottom:17px;left:17px;width:20px;border-top:1px solid currentColor;opacity:.4}
.explorer-card-copy{padding:23px 24px 18px;display:flex;flex-direction:column;min-width:0}
.explorer-card-copy h3{font-family:var(--explorer-serif);font-size:24px;line-height:1.2;letter-spacing:-.035em;font-weight:400;overflow-wrap:anywhere}
.learning-shell--explorer .learn-card p{font-size:13px;line-height:1.75;margin:10px 0 16px}
.learning-shell--explorer .learn-card__foot{font-size:11px;padding:0;gap:12px;white-space:nowrap}
.learning-shell--explorer .learn-card__enter{font-size:17px;margin-left:auto}
.learning-shell--explorer .learn-resume{margin:0;min-width:0;border:1px solid color-mix(in srgb,var(--explorer-sage) 25%,var(--atlas-line));background:linear-gradient(110deg,color-mix(in srgb,var(--explorer-sage) 13%,var(--atlas-bg)),color-mix(in srgb,var(--explorer-sage) 4%,var(--atlas-bg)));padding:22px 26px;border-radius:12px;gap:24px}
.learning-shell--explorer .learn-resume>div{display:block}
.learning-shell--explorer .learn-resume strong{display:block;font-family:var(--explorer-serif);font-size:24px;font-weight:400;line-height:1.35;margin-top:5px;overflow-wrap:anywhere}
.learning-shell--explorer .learn-resume small{font-size:12px;letter-spacing:.01em}
.learning-shell--explorer .learn-resume>a{display:grid;place-items:center;flex-shrink:0;width:44px;height:44px;border-radius:50%;font-size:22px;background:var(--atlas-ink);color:var(--atlas-bg);transition:transform .18s}
.learning-shell--explorer .learn-personal{margin:0}
.learning-shell--explorer .learn-personal .learn-section-heading{margin:0 0 14px}
.learning-shell--explorer .learn-personal h2{font-family:var(--explorer-serif);font-weight:400;font-size:24px}
.learning-shell--explorer .learn-followed-card{border-radius:10px;background:var(--atlas-hover)}
@media(hover:hover) and (pointer:fine){.learning-shell--explorer .learn-card:hover{border-color:var(--section-tone);box-shadow:0 5px 18px color-mix(in srgb,var(--section-tone) 9%,transparent)}.learning-shell--explorer .learn-card:hover .explorer-card-art svg{transform:translateY(-3px)}.learning-shell--explorer .learn-resume>a:hover{transform:translateX(2px)}}
@container(max-width:820px){.learning-shell--explorer .learn-card{grid-template-columns:76px minmax(0,1fr)}.explorer-card-copy{padding:20px}.explorer-card-copy h3{font-size:22px}}
@container(max-width:620px){.explorer-section-grid{grid-template-columns:1fr;gap:11px}.learning-shell--explorer .learn-card{grid-template-columns:84px minmax(0,1fr);min-height:140px}.explorer-field-heading h2{font-size:27px}.explorer-card-copy{padding:19px 20px 16px}.learning-shell--explorer .learn-card p{margin:8px 0 13px}.learning-shell--explorer .learn-resume{padding:20px;gap:16px}.learning-shell--explorer .learn-resume strong{font-size:22px}}
@media(max-width:600px){.learning-shell--explorer .learn-workspace{padding-top:22px;row-gap:24px}.learning-shell--explorer .learn-filters button{padding:8px 11px;min-height:44px;font-size:11px}.explorer-field+.explorer-field{margin-top:31px}}

/* Learning paths: open editorial heading and a chapter-card reading index. */
.learning-shell--path{--path-serif:Georgia,'Times New Roman',serif;--path-tone:#7b8e72}
.learning-shell--path[data-path-field=systems]{--path-tone:#708b9b}
.learning-shell--path[data-path-field=theory]{--path-tone:#998368}
.learning-shell--path[data-path-field=culture]{--path-tone:#a17a77}
.learning-shell--path[data-path-field=practice]{--path-tone:#818977}
.learning-shell--path [data-color]{--field:color-mix(in srgb,var(--path-tone) 75%,var(--atlas-ink));--field-soft:color-mix(in srgb,var(--path-tone) 10%,var(--atlas-bg));--field-art:color-mix(in srgb,var(--path-tone) 40%,var(--atlas-line))}
.learning-shell--path .learn-workspace{max-width:var(--collection-frame-width);padding-top:42px}
.learning-shell--path .learn-hero--series{display:grid;grid-template-columns:minmax(0,1fr) 235px;align-items:end;gap:48px;padding:0 0 36px;border:0;border-bottom:1px solid var(--atlas-line);background:none}
.learning-shell--path .learn-hero__copy{min-width:0}
.learning-shell--path .learn-eyebrow{display:flex;align-items:center;gap:12px;font-size:12px;color:var(--field);margin:0 0 24px}
.learning-shell--path .learn-series-emblem{position:static;display:grid;place-items:center;width:34px;height:34px;border-radius:4px;background:var(--field-soft);color:var(--field)}
.learning-shell--path .learn-series-emblem svg{width:25px;height:25px}
.learning-shell--path .learn-hero h1{font-family:var(--path-serif);font-size:clamp(40px,6.2cqi,72px);font-weight:400;letter-spacing:-.055em;line-height:1.04;text-wrap:balance;overflow-wrap:anywhere}
.learning-shell--path .learn-hero p{max-width:600px;margin-top:22px;font-size:16px;line-height:1.8;color:var(--atlas-muted)}
.path-reading-actions{min-width:0;border-left:1px solid var(--atlas-line);padding-left:28px;padding-bottom:3px}
.learning-shell--path .learn-hero__actions{display:flex;flex-direction:column;align-items:stretch;margin:0;gap:8px}
.learning-shell--path .learn-primary{display:flex;justify-content:space-between;padding:13px 16px;min-height:46px;border-radius:4px;font-size:13px!important}
.learning-shell--path .learn-primary>span{font-size:18px}
.learning-shell--path .learn-follow{justify-content:flex-start;padding:9px 0;font-size:12px!important;min-height:44px}
.learning-shell--path .learn-follow__mark{border-radius:50%}
.learning-shell--path .learn-series-progress{display:flex;align-items:center;gap:12px;border:0;padding:0;margin-top:18px;color:var(--atlas-muted)}
.learning-shell--path .learn-series-progress [data-series-detail]{margin:0;font-size:11px;white-space:nowrap}
.learning-shell--path .learn-series-progress .learn-track{margin:0;min-width:35px;flex:1;height:2px}
.learning-shell--path .learn-track>span{background:var(--path-tone)}
.learning-shell--path .learn-section-heading{margin:30px 0 18px;align-items:baseline}
.learning-shell--path .learn-section-heading h2{font-size:12px;line-height:1.5;font-weight:500;letter-spacing:.08em;text-transform:uppercase;color:var(--atlas-muted)}
.learning-shell--path .learn-section-heading>span{font-size:11px}
.learning-shell--path .learn-topics{grid-template-columns:repeat(2,minmax(0,1fr));gap:20px;align-items:stretch}
.learning-shell--path .learn-topic{display:flex;flex-direction:column;border:1px solid var(--atlas-line);border-top:2px solid var(--field-art);border-radius:4px;min-width:0;background:linear-gradient(140deg,color-mix(in srgb,var(--path-tone) 3%,var(--atlas-bg)),var(--atlas-bg) 65%)}
.learning-shell--path .learn-topic>header{display:grid;grid-template-columns:40px minmax(0,1fr);align-items:start;gap:8px 16px;padding:24px 24px 20px;background:none;border:0}
.learning-shell--path .learn-topic__number{grid-row:1/3;font-family:var(--path-serif);font-size:38px;line-height:1;letter-spacing:-.05em;font-weight:400;color:var(--path-tone);opacity:.65}
.learning-shell--path .learn-topic h3{font-family:var(--path-serif);font-size:26px;line-height:1.2;letter-spacing:-.03em;font-weight:400;overflow-wrap:anywhere}
.learning-shell--path .learn-topic__progress{grid-column:2;display:flex;align-items:center;gap:12px;width:auto;min-width:0;max-width:none;margin:0;padding:0}
.learning-shell--path .learn-topic__progress>span{font-size:10px;white-space:nowrap}
.learning-shell--path .learn-topic__progress .learn-track{margin:0;width:48px;height:2px}
.learning-shell--path .learn-topic ol{grid-template-columns:minmax(0,1fr);padding:0 20px 12px;gap:0}
.learning-shell--path .learn-lesson{border:0;border-top:1px solid color-mix(in srgb,var(--atlas-line) 75%,transparent);border-radius:0;min-width:0}
.learning-shell--path .learn-lesson>a{font-size:14px;line-height:1.65;padding:14px 4px;gap:12px}
.learning-shell--path .learn-lesson__number{font-size:10px;opacity:.55}
.learning-shell--path .learn-lesson__arrow{font-size:13px}
.learning-shell--path .learn-check{width:36px;min-height:44px}
.learning-shell--path .learn-check svg{width:18px;height:18px;border-radius:4px}
.learning-shell--path .learn-topic.is-complete{border-color:var(--field-art)}
.learning-shell--path .learn-topics--single{grid-template-columns:1fr}
.learning-shell--path .learn-topics--single .learn-topic ol{grid-template-columns:repeat(2,minmax(0,1fr));column-gap:24px}
.learning-shell--path .learn-source{padding:20px 24px;margin-top:28px;border-radius:4px}
.learning-shell--path .learn-source summary{font-family:var(--path-serif);font-size:21px}
.learning-shell--path .learn-guide.site-content{margin-top:36px}
@container(max-width:850px){.learning-shell--path .learn-hero--series{grid-template-columns:minmax(0,1fr) 210px;gap:30px}.path-reading-actions{padding-left:22px}.learning-shell--path .learn-topic>header{padding:20px 18px;gap:8px 12px;grid-template-columns:32px minmax(0,1fr)}.learning-shell--path .learn-topic__number{font-size:32px}.learning-shell--path .learn-topic h3{font-size:23px}.learning-shell--path .learn-topic ol{padding-inline:14px}.learning-shell--path .learn-lesson>a{font-size:13px}}
@container(max-width:620px){.learning-shell--path .learn-hero--series{grid-template-columns:minmax(0,1fr);gap:24px;padding-bottom:26px}.learning-shell--path .learn-eyebrow{margin-bottom:18px}.learning-shell--path .learn-hero h1{font-size:clamp(40px,9cqi,55px)}.learning-shell--path .learn-hero p{font-size:14px;line-height:1.75;margin-top:16px}.path-reading-actions{border:0;padding:0}.learning-shell--path .learn-hero__actions{flex-direction:row;align-items:center;flex-wrap:wrap;gap:8px 16px}.learning-shell--path .learn-primary{gap:24px}.learning-shell--path .learn-series-progress{margin-top:16px;max-width:260px}.learning-shell--path .learn-topics{grid-template-columns:minmax(0,1fr);gap:16px}.learning-shell--path .learn-topic h3{font-size:25px}.learning-shell--path .learn-topic>header{padding:22px 20px 18px}.learning-shell--path .learn-topic ol{padding-inline:16px}.learning-shell--path .learn-check{width:44px}.learning-shell--path .learn-topics--single .learn-topic ol{grid-template-columns:minmax(0,1fr)}.learning-shell--path .learn-section-heading{margin-top:24px}}
@media(max-width:600px){.learning-shell--path .learn-workspace{padding-top:26px}}

/* Reserve personal controls before progress hydration, including when JS is unavailable. */
.learning-shell--path .learn-follow[hidden]{display:inline-flex!important;visibility:hidden;pointer-events:none}
.learning-shell--path .learn-check[hidden]{display:grid!important;visibility:hidden;pointer-events:none}
.learning-shell--path .learn-primary>.learn-primary__label{display:grid;font-size:inherit}
.learn-primary__label>span{grid-area:1/1;white-space:nowrap}
.learn-primary__label>[aria-hidden]{visibility:hidden}

/* The server catalog stays visible while local-state enhancements load. */

.learning-shell .learn-primary__arrow{display:grid;place-items:center;flex:0 0 20px}
.learning-shell .learn-primary__arrow svg{width:20px;height:20px}