:root{--lr-bg:#fff;--lr-ink:#373b35;--lr-muted:#767b72;--lr-line:#e5e8e0;--lr-soft:#f5f7f2;--lr-accent:#506b54;--lr-width:min(560px,43vw)}
.lr-toolbar{display:flex;align-items:center;gap:14px;padding:18px 20px;border:1px solid var(--lr-line);border-radius:10px;margin:24px 0 38px;background:var(--lr-soft);color:var(--lr-ink)}
.lr-toolbar-icon{color:var(--lr-accent);display:flex}.lr-toolbar>div:nth-child(2){flex:1;min-width:0}.lr-toolbar strong{display:block;font-size:14px;font-weight:600}.lr-toolbar span:not([aria-hidden]){display:block;font-size:13px;color:var(--lr-muted);margin-top:5px;line-height:1.5}
.lr-toolbar button,.lr-panel button,.lr-reference{font:inherit;box-shadow:none;border:1px solid var(--lr-line);background:var(--lr-bg);color:var(--lr-ink);padding:8px 12px;border-radius:6px;font-size:13px;line-height:1.5;cursor:pointer;min-height:34px;letter-spacing:normal}
.lr-toolbar button:hover,.lr-panel button:hover,.lr-reference:hover{border-color:#95a68f;background:var(--lr-soft)}.lr-panel button:disabled{opacity:.45;cursor:default}.lr-panel :focus-visible,.lr-toolbar :focus-visible,.lr-reference:focus-visible{outline:2px solid var(--lr-accent);outline-offset:3px}
.lr-supplement{margin:20px 0 0;border-left:2px solid #a9bca0;padding:4px 0 4px 18px;color:var(--lr-ink)}.lr-eyebrow{font-size:11px;font-weight:600;letter-spacing:.09em;text-transform:uppercase;color:var(--lr-accent)}
#lecturePanel .lr-supplement p,.class-note .lr-supplement p{font-size:15px;line-height:1.8;margin:10px 0 12px;white-space:pre-wrap}.lr-references{display:flex;flex-wrap:wrap;gap:6px}.lr-reference{display:inline-flex;align-items:center;gap:6px;max-width:100%;text-align:left;overflow-wrap:anywhere;font-size:12px;padding:5px 8px}.lr-reference svg{flex:none;width:14px;height:14px}
.lr-conflict{background:#faf5e8;padding:12px;border-radius:6px;font-size:13px;color:#775d2c}.lr-conflict p{margin:5px 0!important;color:inherit!important}.lr-additional-heading{margin:48px 0 20px;padding-top:28px;border-top:1px solid var(--lr-line)}.lr-additional-heading p{color:var(--lr-muted);font-size:14px!important}
.lr-panel{position:fixed;z-index:180;inset:0 0 0 auto;width:var(--lr-width);height:100dvh;display:flex;flex-direction:column;box-sizing:border-box;background:var(--lr-bg);color:var(--lr-ink);border-left:1px solid var(--lr-line);box-shadow:-8px 0 30px #18251206;font-family:inherit}
.lr-panel-header{display:flex;justify-content:space-between;align-items:center;min-height:74px;padding:0 24px;border-bottom:1px solid var(--lr-line);flex:none}.lr-panel-tabs{display:flex;gap:22px;align-self:stretch}.lr-panel-tabs button{border:0;border-radius:0;background:transparent;padding:0;font-size:14px;color:var(--lr-muted)}.lr-panel-tabs button[aria-pressed=true]{border-bottom:2px solid var(--lr-accent);color:var(--lr-ink);font-weight:600}.lr-panel .lr-close{border:0;background:transparent;font-size:25px;padding:2px 8px;color:var(--lr-muted)}
.lr-library{overflow:auto;padding:34px 28px 60px}.lr-library-heading h2{font-size:28px;letter-spacing:-.8px;line-height:1.25;margin:12px 0}.lr-library-heading p{font-size:14px;line-height:1.8;color:var(--lr-muted);margin:0 0 26px}.lr-upload{border:1px dashed #b5c1ac;border-radius:10px;background:var(--lr-soft);display:flex;align-items:center;flex-direction:column;text-align:center;gap:8px;padding:25px 16px;cursor:pointer}.lr-upload svg{width:27px;height:27px;margin-bottom:7px;color:var(--lr-accent)}.lr-upload strong{font-size:14px}.lr-upload span{font-size:13px;color:var(--lr-muted)}.lr-upload small{font-size:11px;color:var(--lr-muted);margin-top:5px}.lr-upload input{position:absolute;opacity:0;width:1px;height:1px;pointer-events:none}.lr-upload.is-dragging{border-color:var(--lr-accent);background:#e8f0e3}.lr-upload.is-busy{opacity:.65;cursor:progress}
.lr-status{font-size:13px;line-height:1.65;color:var(--lr-accent);margin:18px 0;white-space:pre-wrap}.lr-status:empty{display:none}.lr-status.is-error{color:#ac4437;background:#fff3ee;padding:12px;border-radius:6px}.lr-document{padding:22px 0!important;margin:0!important;border-bottom:1px solid var(--lr-line)}.lr-document-heading{display:flex;align-items:center;gap:10px}.lr-document-heading svg{flex:none;color:var(--lr-accent)}.lr-document-heading button{border:0!important;padding:0!important;background:transparent!important;font-weight:600;font-size:14px;text-align:left;overflow-wrap:anywhere}.lr-document>p{font-size:12px;color:var(--lr-muted);line-height:1.8;margin:9px 0}.lr-badge{display:inline-block;padding:1px 7px;margin-left:5px;border-radius:4px;background:var(--lr-soft);color:var(--lr-accent)}.lr-document-actions{display:flex;flex-wrap:wrap;gap:8px;margin-top:14px}.lr-document-actions button{font-size:12px;padding:6px 9px}.lr-document-actions .lr-remove{margin-left:auto;border-color:transparent;background:transparent;color:var(--lr-muted)}.lr-empty{padding:34px 16px;text-align:center;font-size:14px;line-height:1.9;color:var(--lr-muted)}.lr-library-footnote,.lr-readonly{font-size:12px;line-height:1.8;color:var(--lr-muted);margin-top:24px}
.lr-pdf-toolbar{display:flex;gap:10px;align-items:center;padding:16px 20px;flex:none}.lr-pdf-toolbar strong{overflow:hidden;text-overflow:ellipsis;white-space:nowrap;flex:1;font-size:13px}.lr-pdf-toolbar a{font-size:12px;color:var(--lr-accent)}.lr-pagination{display:flex;align-items:center;justify-content:center;gap:12px;padding:0 20px 14px;font-size:12px;color:var(--lr-muted);flex:none}.lr-pagination input{width:50px;font:inherit;padding:5px;border:1px solid var(--lr-line);border-radius:4px;background:var(--lr-bg);color:var(--lr-ink)}.lr-pdf-view{flex:1;min-height:0;background:var(--lr-soft)}.lr-pdf-view iframe{border:0;width:100%;height:100%;display:block}.lr-pdf-view>p{padding:24px;line-height:1.7;font-size:14px}.lr-reader-hint{font-size:11px;line-height:1.6;padding:10px 20px;margin:0;color:var(--lr-muted);flex:none}
body#elthosApp.lecture-materials-open.personal-lecture .session-detail-layout{grid-template-columns:minmax(0,1fr)!important;margin-right:var(--lr-width)!important}body#elthosApp.lecture-materials-open.personal-lecture .session-chat-shell{display:none!important}body.lecture-materials-open #classSeriesWorkspace{width:calc(100% - var(--lr-width));margin-right:var(--lr-width)}body.lecture-materials-open #classSeriesWorkspace .class-tutor-launcher{display:none}body.lecture-materials-open #classSeriesWorkspace .class-reader{padding-left:36px;padding-right:36px}body.lecture-materials-open #classSeriesWorkspace .class-sidebar{width:220px}body.lecture-materials-open #classSeriesWorkspace .class-workbench{grid-template-columns:220px minmax(0,1fr)}
:root[data-theme=dark]{--lr-bg:#21231f;--lr-ink:#e6e9df;--lr-muted:#acb2a5;--lr-line:#3c4136;--lr-soft:#2b3026;--lr-accent:#b2c7a7}:root[data-theme=dark] .lr-conflict{background:#393224;color:#e2cc9d}:root[data-theme=dark] .lr-status.is-error{background:#402c27;color:#ffc1b4}
@media(max-width:1050px){:root{--lr-width:46vw}body.lecture-materials-open #classSeriesWorkspace .class-sidebar{display:none}body.lecture-materials-open #classSeriesWorkspace .class-workbench{grid-template-columns:minmax(0,1fr)}.lr-toolbar{flex-wrap:wrap}.lr-toolbar>button{margin-left:32px}.lr-library{padding:26px 20px}}
@media(max-width:720px){:root{--lr-width:100vw}.lr-panel{width:100vw}.lr-panel-header{min-height:60px}.lr-library{padding:26px 22px}.lr-toolbar{gap:10px;padding:15px}.lr-toolbar>button{margin-left:28px}body#elthosApp.lecture-materials-open.personal-lecture .session-detail-layout{margin-right:0!important}body.lecture-materials-open #classSeriesWorkspace{width:100%;margin-right:0}.lr-panel button{min-height:40px}}
/* The session grid normally has an explicit full viewport width. Reserve the reader's space. */
body#elthosApp.lecture-materials-open.personal-lecture .session-detail-layout{width:calc(100% - var(--lr-width))!important;grid-template-areas:"session"!important;min-width:0!important}
@media(max-width:720px){body#elthosApp.lecture-materials-open.personal-lecture .session-detail-layout{width:100%!important}}

.lr-pdf-toolbar{flex-wrap:wrap}.lr-pdf-toolbar strong{min-width:120px}.lr-pdf-toolbar a{white-space:nowrap}

.lr-panel.is-expanded{width:min(1160px,96vw);box-shadow:-20px 0 80px #0002}.lr-pdf-view{overflow:auto;padding:16px;box-sizing:border-box}.lr-pdf-view canvas{display:block;margin:0 auto;background:white;box-shadow:0 2px 12px #0002}.lr-zoom{display:flex;align-items:center;justify-content:center;gap:10px;padding:0 16px 14px;flex:none;font-size:12px;color:var(--lr-muted)}.lr-zoom button{padding:4px 10px;min-height:28px}@media(max-width:720px){.lr-panel.is-expanded{width:100vw}}

/* Shared divider: the original CSS width remains the default until dragged. */
.lr-resize-handle{position:absolute;left:-6px;top:0;bottom:0;width:12px;z-index:3;cursor:col-resize;touch-action:none;outline:none}
.lr-resize-handle:before{content:"";position:absolute;left:5px;top:0;bottom:0;width:2px;background:transparent;transition:background .15s}
.lr-resize-handle span{position:absolute;left:3px;top:50%;width:5px;height:38px;border-radius:4px;background:#95a68f;opacity:0;transition:opacity .15s}
.lr-resize-handle:hover:before,.lr-resize-handle:focus-visible:before,.lr-resizing .lr-resize-handle:before{background:var(--lr-accent)}
.lr-resize-handle:hover span,.lr-resize-handle:focus-visible span,.lr-resizing .lr-resize-handle span{opacity:1}
body.lr-resizing,body.lr-resizing *{cursor:col-resize!important;user-select:none!important}
.lr-resizing .lr-pdf-view canvas{max-width:100%;height:auto!important}
.lr-panel.is-expanded .lr-resize-handle{display:none}
body.lecture-materials-open.lr-narrow-notes #classSeriesWorkspace .class-sidebar{display:none}
body.lecture-materials-open.lr-narrow-notes #classSeriesWorkspace .class-workbench{grid-template-columns:minmax(0,1fr)}
@media(max-width:720px){.lr-resize-handle{display:none}}

/* In class, on the slides: the merged reading under a topic. The professor's words stay above it. */
.lr-inclass{margin:22px 0 0;padding:18px 20px 16px;border:1px solid var(--lr-line);border-left:3px solid var(--lr-accent);border-radius:0 10px 10px 0;background:var(--lr-soft);color:var(--lr-ink)}
.lr-inclass .lr-eyebrow{display:block;margin-bottom:6px}.lr-inclass .study-prose p{font-size:15px;line-height:1.8;margin:8px 0}
.lr-equation{margin:12px 0;padding:10px 14px;background:var(--lr-bg);border:1px solid var(--lr-line);border-radius:8px;overflow-x:auto}.lr-equation .study-prose p{margin:0}.lr-equation figcaption{font-size:12px;color:var(--lr-muted);margin-top:6px}.lr-equation figcaption span{color:var(--lr-accent)}
.lr-figure{margin:14px 0;display:grid;grid-template-columns:minmax(160px,260px) minmax(0,1fr);gap:14px;align-items:start}.lr-figure figcaption{font-size:14px;line-height:1.7;color:var(--lr-ink)}
.lr-thumb{display:inline-flex;flex-direction:column;gap:6px;align-items:stretch;padding:6px;border:1px solid var(--lr-line);border-radius:8px;background:var(--lr-bg);cursor:pointer;font:inherit;color:var(--lr-muted);text-align:left;max-width:260px;box-shadow:none}.lr-thumb:hover{border-color:#95a68f}.lr-thumb img{display:block;width:100%;height:auto;border-radius:4px;background:#fff;min-height:60px}.lr-thumb img:not([src]){opacity:0}.lr-thumb.is-text img{display:none}.lr-thumb.is-text span{display:flex;justify-content:center;padding:18px;color:var(--lr-accent)}.lr-thumb small{font-size:11px;line-height:1.4;overflow-wrap:anywhere}
.lr-slides{display:flex;flex-wrap:wrap;gap:10px;margin-top:12px}.lr-slides .lr-thumb{width:150px}
.lr-stale{font-size:12px;color:var(--lr-muted);margin:6px 0 0}
.lr-slide-only{margin:48px 0 20px;padding-top:24px;border-top:1px solid var(--lr-line)}.lr-slide-only summary{cursor:pointer;list-style:none;display:flex;flex-direction:column;gap:4px;padding:14px 18px;border:1px solid var(--lr-line);border-radius:10px;background:var(--lr-soft)}.lr-slide-only summary::-webkit-details-marker{display:none}.lr-slide-only summary strong{font-size:16px}.lr-slide-only summary>span:last-child{font-size:13px;color:var(--lr-muted)}.lr-slide-only summary:after{content:"Show";font-size:12px;color:var(--lr-accent);margin-top:4px}.lr-slide-only[open] summary:after{content:"Hide"}
.lr-slide-only-item{display:grid;grid-template-columns:minmax(140px,200px) minmax(0,1fr);gap:16px;padding:20px 4px;border-bottom:1px solid var(--lr-line)}.lr-slide-only-item h3{font-size:16px;margin:0 0 6px}.lr-slide-only-item p{font-size:14px;line-height:1.7;color:var(--lr-ink);margin:0 0 8px;white-space:pre-wrap}.lr-slide-only-item .lr-figure-note{font-size:13px;color:var(--lr-muted)}.lr-slide-only-item pre{font-size:12px;overflow:auto;background:var(--lr-bg);border:1px solid var(--lr-line);border-radius:6px;padding:10px}
.lr-classview{display:flex;align-items:center;gap:14px;margin-top:22px;padding:14px 16px;border:1px solid var(--lr-line);border-radius:10px;background:var(--lr-soft)}.lr-classview>div{flex:1;min-width:0}.lr-classview strong{display:block;font-size:14px}.lr-classview span{display:block;font-size:12px;line-height:1.6;color:var(--lr-muted);margin-top:3px}.lr-classview button{font-size:12px;white-space:nowrap}.lr-badge.is-vision{background:#e8f0e3}
:root[data-theme=dark] .lr-badge.is-vision{background:#34402f}:root[data-theme=dark] .lr-thumb img{background:#fff}
@media(max-width:720px){.lr-figure,.lr-slide-only-item{grid-template-columns:minmax(0,1fr)}.lr-thumb{max-width:100%}}

/* Automatic preparation feedback under the materials toolbar, and the merged-section footer. */
.lr-toolbar-note{font-size:13px;color:var(--lr-accent);margin:-26px 0 30px;line-height:1.6}.lr-toolbar-error{font-size:13px;color:#ac4437;background:#fff3ee;padding:10px 12px;border-radius:6px;margin:-26px 0 30px;line-height:1.6}.lr-toolbar-error button{font:inherit;font-size:12px;margin-left:8px;padding:4px 10px;border:1px solid #e0b4aa;border-radius:6px;background:#fff;color:#ac4437;cursor:pointer}
.lr-also{font-size:12px;color:var(--lr-muted);margin:10px 0 0;display:flex;flex-wrap:wrap;gap:6px;align-items:center}.lr-also .lr-reference{padding:3px 7px}
.lr-inclass-foot{display:flex;justify-content:flex-end;align-items:center;gap:10px;margin-top:12px}.lr-flag{font:inherit;font-size:11px;color:var(--lr-muted);background:transparent;border:0;padding:2px 0;cursor:pointer;text-decoration:underline dotted}.lr-flag:hover{color:var(--lr-ink)}.lr-flagged{font-size:11px;color:#ac4437}.lr-inclass.is-flagged{opacity:.7;border-left-color:#c98a7f}
.lr-stale button,.lr-stale .lr-reference{font:inherit;font-size:12px;margin-left:6px;padding:3px 9px;border:1px solid var(--lr-line);border-radius:6px;background:var(--lr-bg);color:var(--lr-accent);cursor:pointer}
.lr-chat-slide{display:block;margin:6px 0 10px}.lr-chat-thumb{width:200px;max-width:100%}
:root[data-theme=dark] .lr-toolbar-error{background:#402c27;color:#ffc1b4}:root[data-theme=dark] .lr-toolbar-error button{background:#2b3026;color:#ffc1b4;border-color:#6b4a43}
.lr-thumb{position:relative}.lr-thumb-badge{position:absolute;top:10px;left:10px;font-style:normal;font-size:11px;font-weight:600;color:#fff;background:rgba(0,0,0,.62);padding:3px 8px;border-radius:999px;pointer-events:none}.lr-thumb.is-text .lr-thumb-badge{position:static;color:var(--lr-muted);background:transparent;padding:0}