.content-workspace-shell{padding-top:.65rem}.content-workspace-shell__inner{display:grid;gap:.55rem}.content-workspace-shell__bar{display:flex;flex-wrap:nowrap;align-items:center;justify-content:flex-end;gap:.6rem}.content-nav{display:inline-flex;flex:0 0 auto;flex-wrap:nowrap;gap:0;align-items:center;overflow:hidden;border:1px solid rgb(var(--c-slate)/.18);border-radius:1rem;background:rgb(var(--c-surface-cool)/.78);box-shadow:0 12px 32px rgb(var(--c-ink-strong-2)/.05)}.content-nav__item{padding:.48rem .7rem;border-radius:0;background:transparent;border:0;color:var(--muted);font-weight:700;line-height:1;white-space:nowrap}.content-nav__item+.content-nav__item{border-left:1px solid rgb(var(--c-slate)/.14)}.content-nav__item--active{background:rgb(var(--c-parchment-mid)/.88);box-shadow:inset 0 0 0 1px rgb(var(--c-bronze-mid)/.18);color:rgb(var(--c-bronze-deep-2))}.content-workspace-shell .content-nav{justify-content:flex-end}.content-workspace-actions-slot{flex:1 1 auto;min-width:0;display:flex;justify-content:flex-end}.content-workspace-actions-slot:empty{display:none}.content-route-actions{flex-wrap:nowrap;justify-content:space-between;width:100%;overflow-x:auto;scrollbar-width:thin}.content-route-actions,.content-route-actions__group{display:flex;align-items:center;gap:.38rem;min-width:0}.content-route-actions__group{flex:0 0 auto;flex-wrap:nowrap;justify-content:flex-end}.content-course-builder{display:grid;gap:.85rem}.content-course-builder__rail{display:grid;gap:.65rem;align-content:start;min-height:0}.content-course-builder__rail-header{display:grid;gap:.35rem}.content-course-builder__rail-header h2{margin:0}.content-course-builder__rail-items{display:grid;gap:.45rem;min-height:0}.content-course-builder__tab{width:100%;display:flex;align-items:center;justify-content:space-between;gap:.75rem;padding:.68rem .82rem;border-radius:18px;border:1px solid rgb(var(--c-slate)/.14);background:rgb(var(--c-cool-wash)/.88);color:var(--foreground);text-align:left}.content-course-builder__tab>span{min-width:0;flex:1 1 auto;display:grid;gap:.2rem}.content-course-builder__tab span,.content-course-builder__tab strong{min-width:0}.content-course-builder__tab strong{display:block;overflow:hidden;text-overflow:ellipsis;white-space:normal;overflow-wrap:anywhere;line-height:1.25}.content-course-builder__tab span{display:block;color:var(--muted);font-size:.84rem;overflow-wrap:anywhere}.content-course-builder__tab--active{border-color:rgb(var(--c-gold-mid-6)/.45);background:rgb(var(--c-parchment-mid-4)/.75)}.content-course-builder__tab--add{justify-content:center;padding:.72rem;font-weight:700}.content-course-builder__panel{min-width:0;min-height:0;display:grid;gap:.85rem;scrollbar-gutter:stable}.content-course-builder__section-title{display:flex;flex-wrap:wrap;align-items:baseline;justify-content:space-between;gap:.5rem .75rem}.content-course-builder__section-title h2,.content-course-builder__section-title h3{margin:0}.content-course-builder__lesson-summary{display:grid;gap:.2rem;min-width:0}.content-course-builder__lesson-summary>*{min-width:0;overflow-wrap:anywhere}.content-course-builder__sequence-button{min-width:0;flex:1;display:flex;align-items:center;gap:.55rem;border:0;padding:0;background:transparent;color:var(--foreground);text-align:left;cursor:pointer}.content-course-builder__sequence-button>span{min-width:0;display:grid;gap:.2rem;align-items:start}.content-course-builder__sequence-button strong{color:var(--foreground);overflow-wrap:anywhere}.content-course-builder__sequence-button span span{color:var(--muted);overflow-wrap:anywhere}.content-course-builder__sequence-button:focus-visible strong,.content-course-builder__sequence-button:hover strong{color:var(--primary-strong)}.content-course-builder__sequence-button:focus-visible{outline:3px solid var(--ring);outline-offset:4px;border-radius:12px}.content-course-builder__embedded-study{display:grid;gap:.65rem;min-width:0;overflow:visible;position:relative}.content-course-builder__embedded-study-header{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:.75rem}.content-course-builder__embedded-study-title{display:grid;gap:.2rem;min-width:0}.content-course-builder__embedded-study-title h4{margin:0;overflow-wrap:anywhere}.content-course-builder__embedded-study-title span{overflow-wrap:anywhere}.content-course-builder__empty-study{border:1px dashed rgb(var(--c-slate)/.22);border-radius:18px;padding:.95rem 1rem;color:var(--muted)}.content-course-builder__stack{display:grid;gap:.8rem}.content-item-meta,.content-item-title{min-width:0;overflow-wrap:anywhere}.content-item-title{margin:0}.library-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(19rem,1fr));gap:1.1rem}.library-tile{display:grid;align-content:start;gap:.55rem;padding:1.15rem 1.2rem;color:var(--foreground);text-decoration:none;transition:border-color .18s ease,box-shadow .18s ease,transform .18s ease}.library-tile:hover{border-color:rgb(var(--c-gold)/.28);box-shadow:0 20px 44px rgb(var(--c-ink)/.12);transform:translateY(-2px)}.library-tile__top{display:flex;align-items:center;justify-content:space-between;gap:.75rem}.library-tile__count{color:var(--muted);font-size:.84rem;font-weight:600;text-align:right}.library-tile__count strong{color:var(--foreground);font-size:1.02rem;font-weight:800}.library-tile h2{margin:.2rem 0 0;font-size:1.05rem}.library-tile p{margin:0;color:var(--muted);font-size:.9rem;line-height:1.55}.library-tile__cta{display:inline-flex;align-items:center;gap:.35rem;margin-top:.25rem;color:rgb(var(--c-bronze-deep-2));font-size:.88rem;font-weight:700}.library-tile:hover .library-tile__cta{color:var(--primary-strong)}.library-upcoming{display:flex;align-items:center;gap:.65rem;padding:.85rem 1.1rem;border:1px dashed rgb(var(--c-slate)/.3);border-radius:18px;color:var(--muted)}.library-upcoming svg{flex-shrink:0}.library-upcoming p{margin:0;font-size:.9rem;line-height:1.5}.library-upcoming strong{color:var(--foreground)}.library-upcoming a{color:var(--primary-strong);font-weight:700;text-decoration:underline;text-decoration-thickness:.07em;text-underline-offset:.16em}.stat-strip{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:1.1rem}.stat-tile{display:grid;gap:.1rem;padding:1rem 1.2rem}.stat-tile__value{font-size:1.55rem;font-weight:800;letter-spacing:-.02em}.stat-tile__label{color:var(--muted);font-size:.85rem;font-weight:600}.recent-item{grid-template-columns:auto minmax(0,1fr) auto;align-items:center;gap:.75rem;color:var(--foreground);text-decoration:none}.recent-item__icon{width:2.4rem;height:2.4rem;border-radius:.6rem}.recent-item__text{display:grid;gap:.1rem;min-width:0}.recent-item__text strong{overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.recent-item:hover .recent-item__text strong{color:var(--primary-strong)}.study-picker-dialog{display:grid;grid-template-rows:auto auto minmax(0,1fr);width:min(720px,calc(100vw - 2rem));max-height:min(760px,calc(100vh - 2rem));overflow:hidden}.study-picker-dialog .content-picker-list{max-height:none;min-height:0}.content-sequence-preview{border-top:1px solid rgb(var(--c-slate)/.14);padding-top:1rem}.content-sequence-preview h3{margin:0 0 .75rem;font-size:1rem}.content-sequence-preview ol{margin:0;padding-left:1.1rem;color:var(--muted);display:grid;gap:.4rem}.pgn-import-dialog{width:min(480px,100%);max-height:calc(100dvh - 2rem);overflow-y:auto}.pgn-import-dialog__or{text-align:center}.pgn-import-dialog__header{display:flex;align-items:center;justify-content:space-between;gap:1rem;margin-bottom:1rem}.pgn-import-dialog__header h2{margin:0}.pgn-import-dialog__actions{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:.75rem}@media (min-width:768px){.content-course-builder{grid-template-columns:240px minmax(0,1fr);align-items:stretch;max-height:calc(100vh - 11rem);min-height:min(760px,calc(100vh - 11rem));overflow:visible}.content-course-builder__rail{position:sticky;top:6.25rem;max-height:calc(100vh - 7rem);overflow:auto;overscroll-behavior:contain;padding-right:.15rem}.content-course-builder__panel{max-height:calc(100vh - 11rem);overflow:auto;overscroll-behavior:contain;padding-right:.25rem}.course-editor-page{padding-block:.75rem}.course-editor-page>.content-editor{height:max(560px,calc(100dvh - 12rem));max-height:max(560px,calc(100dvh - 12rem));display:flex;flex-direction:column;overflow:hidden}.course-editor-page>.content-editor>.content-course-builder{flex:1 1 auto;min-height:0;max-height:none;overflow:hidden}.course-editor-page>.content-editor>.content-course-builder>.content-course-builder__rail{position:static;height:100%;max-height:none;overflow:auto}.course-editor-page>.content-editor>.content-course-builder>.content-course-builder__panel{height:100%;max-height:none;overflow:auto}.course-editor-page .content-editor--embedded{height:auto;max-height:none;display:grid;overflow:visible}.course-editor-page .content-editor--embedded .content-block-list,.course-editor-page .content-editor--embedded .content-course-builder__stack{min-height:0;overflow:visible}}.lesson-reader{gap:1.25rem}.lesson-reader__header{display:grid;gap:.4rem}.lesson-reader__header--preview{padding:.85rem 1rem;border:1px solid rgb(var(--c-teal)/.35);border-left:4px solid rgb(var(--c-teal));border-radius:.9rem;background:rgb(var(--c-teal-wash))}.lesson-reader__header--preview .lesson-reader__eyebrow{color:rgb(var(--c-teal-deep))}.lesson-reader__eyebrow{margin:0;color:var(--muted);font-size:.78rem;font-weight:800;letter-spacing:.1em;text-transform:uppercase}.content-rule-card h2{font-size:clamp(1.2rem,2.2vw,1.45rem);letter-spacing:-.02em}.content-rule-card .page-title-row__actions{margin-top:1rem}.lesson-reader__header h1{margin:0;font-size:clamp(1.6rem,3.4vw,2.15rem);letter-spacing:-.03em;overflow-wrap:anywhere}.lesson-reader__description{margin:0;max-width:46rem;color:var(--muted);line-height:1.6;overflow-wrap:anywhere}.lesson-reader__meta{display:flex;flex-wrap:wrap;align-items:center;gap:.6rem;margin-top:.15rem}.lesson-reader__contents{padding:1rem 1.25rem;display:grid;gap:.5rem}.lesson-reader__contents-label{margin:0;color:var(--muted);font-size:.78rem;font-weight:800;letter-spacing:.08em;text-transform:uppercase}.lesson-reader__contents ol{margin:0;padding-left:1.15rem;display:grid;gap:.35rem}.lesson-reader__contents a{color:var(--primary-strong);font-weight:600;text-decoration:none}.lesson-reader__contents a:focus-visible,.lesson-reader__contents a:hover{text-decoration:underline;text-underline-offset:.15em}.lesson-reader__body{padding:1.25rem;display:grid}.lesson-reader__body>*+*{margin-top:1.75rem;padding-top:1.75rem;border-top:1px solid var(--border)}.lesson-reader__prose{max-width:46rem;color:var(--foreground);line-height:1.72}.lesson-reader__prose>:first-child{margin-top:0}.lesson-reader__prose p{margin:0 0 .85rem}.lesson-reader__prose ol,.lesson-reader__prose ul{margin:0 0 1rem;padding-left:1.15rem;display:grid;gap:.4rem}.lesson-reader__prose a{color:var(--primary-strong);font-weight:600;text-decoration:underline;text-underline-offset:.15em}.lesson-reader__section-header{display:flex;flex-wrap:wrap;align-items:flex-start;justify-content:space-between;gap:.75rem;margin-bottom:1rem}.lesson-reader__section-kicker{margin:0 0 .2rem;color:var(--muted);font-size:.78rem;font-weight:700;letter-spacing:.06em;text-transform:uppercase}.homework-back-link{align-self:flex-start;width:max-content;margin-bottom:.35rem}.lesson-reader__fork{align-self:flex-end;margin:0 0 .75rem auto}.lesson-reader__section-header h2{margin:0;font-size:1.25rem;letter-spacing:-.02em;overflow-wrap:anywhere}.lesson-reader__unavailable{margin:0;padding:.9rem 1.1rem;border-radius:.75rem;background:rgb(var(--c-cool-wash-strong-2)/.7);color:var(--muted)}.content-block.content-block--locked{display:flex;align-items:center;justify-content:space-between;gap:.5rem;cursor:default;color:var(--muted)}.lesson-pager-bar{position:sticky;top:4.4rem;z-index:5;min-width:0;max-width:100%;display:flex;flex-wrap:wrap;align-items:center;gap:.5rem 1rem;margin:0 0 .9rem;padding:.5rem .7rem;border:1px solid var(--border);border-radius:.85rem;background:var(--card-solid);box-shadow:var(--shadow-soft)}.lesson-pager-bar__live{display:flex;align-items:center;gap:.6rem;flex:none;padding-right:.9rem;border-right:1px solid var(--border)}.lesson-pager-bar__status{display:inline-flex;align-items:center;gap:.5rem;white-space:nowrap;font-weight:600;font-size:.9rem}.lesson-pager-bar__dot{flex:none;width:.5rem;height:.5rem;border-radius:50%;background:rgb(var(--c-green-strong));box-shadow:0 0 0 3px rgb(var(--c-green)/.2)}.lesson-pager-bar__search{display:flex;align-items:center;gap:.45rem;flex:1 1 100%;min-width:0;padding:.3rem .6rem;border:1px solid var(--border);border-radius:999px;background:rgb(var(--c-surface)/.7);color:var(--muted)}.lesson-pager-bar__search input{flex:1 1 auto;min-width:0;border:0;background:transparent;color:var(--foreground);font:inherit;font-size:.9rem;padding:.15rem 0}.lesson-pager-bar__search input:focus-visible{outline:none}.lesson-pager-bar__search:focus-within{border-color:rgb(var(--c-gold)/.45);box-shadow:0 0 0 3px var(--ring)}.lesson-pager-bar__search-count{flex:none;font-size:.8rem;white-space:nowrap}.lesson-pager-bar__chips{display:flex;align-items:center;gap:.35rem;flex:1 1 12rem;min-width:0;overflow-x:auto;scrollbar-width:thin;padding:.1rem 0}.lesson-pager-chip{display:inline-flex;align-items:center;gap:.45rem;flex:none;max-width:14rem;padding:.35rem .75rem;border:1px solid var(--border);border-radius:999px;background:transparent;color:inherit;font:inherit;font-size:.88rem;cursor:pointer}.lesson-pager-chip:focus-visible,.lesson-pager-chip:hover{border-color:rgb(var(--c-gold)/.5)}.lesson-pager-chip--active{border-color:rgb(var(--c-gold)/.65);background:rgb(var(--c-gold)/.14);font-weight:700}.lesson-pager-chip__index{flex:none;color:var(--muted);font-size:.8rem;font-variant-numeric:tabular-nums}.lesson-pager-chip__title{min-width:0;overflow:hidden;white-space:nowrap;text-overflow:ellipsis}.lesson-pager-chip__live{flex:none;width:.4rem;height:.4rem;border-radius:50%;background:rgb(var(--c-green-strong))}.lesson-pager__notice{margin:0 0 .9rem}.lesson-reader__resource-row{display:flex;flex-wrap:wrap;align-items:baseline;justify-content:space-between;gap:.5rem 1rem}.lesson-reader__resource-title{font-weight:700}.lesson-reader__resource-row a{color:var(--primary-strong);font-weight:600;text-decoration:underline;text-underline-offset:.15em;white-space:nowrap}@media (max-width:900px){.lesson-pager-bar{top:.5rem}}@media (max-width:767px){.content-workspace-shell .content-nav{justify-content:flex-start}.content-course-builder__rail-items{grid-template-columns:repeat(auto-fit,minmax(140px,1fr))}.stat-strip{gap:.6rem}.stat-tile{padding:.8rem .9rem}.stat-tile__value{font-size:1.25rem}.lesson-reader__body{padding:1rem}.lesson-reader__section-header{flex-direction:column;align-items:flex-start;gap:.5rem}.lesson-pager-bar{padding:.45rem .6rem}.lesson-pager-bar__live{padding-right:.6rem}.lesson-pager-bar__status{font-size:.82rem}.lesson-pager-chip{max-width:10rem;font-size:.82rem}}.board-icon-frame{flex:none;display:inline-flex;width:var(--board-icon-size,80px);height:var(--board-icon-size,80px);border-radius:4px;overflow:hidden;box-shadow:0 0 0 1px rgb(var(--c-ink)/.12)}.board-icon{display:block;width:100%;height:100%}.board-icon rect{shape-rendering:crispEdges}.board-icon .board-svg__border{stroke:none}.board-icon--unknown{flex:none;display:inline-block;width:var(--board-icon-size,80px);height:var(--board-icon-size,80px);border-radius:4px;background:repeating-conic-gradient(rgb(var(--c-board-dark)/.5) 0 25%,rgb(var(--c-board-light)/.5) 0 50%) 0 0 /25% 25%}.lesson-editor__side{display:grid;gap:1rem;align-content:start;align-self:stretch;min-width:0}.lesson-editor__side--plain{display:contents}.lesson-rail{position:sticky;top:1rem;max-height:calc(100vh - 2rem);display:flex;flex-direction:column}.lesson-rail__count{gap:.5rem}.lesson-rail__list{display:grid;gap:.45rem;flex:1;min-height:0;overflow:auto;padding-right:.15rem;align-content:start}.lesson-rail__empty{padding:.5rem .2rem}.lesson-rail__item{display:grid;grid-template-columns:1.4rem auto minmax(0,1fr);align-items:center;gap:.6rem;text-align:left;border:1px solid rgb(var(--c-slate)/.14);border-radius:16px;padding:.45rem .6rem;background:rgb(var(--c-cool-wash)/.88);color:inherit;cursor:pointer}.lesson-rail__item:hover{border-color:rgb(var(--c-slate)/.3)}.lesson-rail__item:focus-visible{outline:2px solid var(--ring);outline-offset:2px}.lesson-rail__item--active{border-color:rgb(var(--c-gold)/.5);background:rgb(var(--c-gold)/.12);box-shadow:inset 3px 0 0 rgb(var(--c-gold-strong)/.85)}:root[data-theme=dark] .lesson-rail__item{background:rgb(var(--c-cool-wash-strong)/.9)}:root[data-theme=dark] .lesson-rail__item--active{background:rgb(var(--c-gold)/.2);box-shadow:inset 3px 0 0 rgb(var(--c-gold-strong))}.lesson-rail__item--slim{padding:.35rem .6rem}.lesson-rail__index{color:var(--muted);font-size:.8rem;font-variant-numeric:tabular-nums}.lesson-rail__glyph{width:1.5rem;height:1.5rem;border-radius:6px;display:grid;place-items:center;color:var(--muted);background:rgb(var(--c-slate)/.12)}.lesson-rail__title{color:rgb(var(--c-bronze-deep-2));font-weight:600;font-size:.92rem;line-height:1.25;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}.lesson-rail__title--muted{color:var(--muted);font-weight:500}.blocks-warning{margin:0;color:rgb(var(--c-amber-strong));font-size:.88rem;font-weight:650;line-height:1.45;border-color:rgb(var(--c-amber-strong)/.35);background:rgb(var(--c-amber-wash))}.editor-panel--blocks>.editor-panel__header>h2{flex:0 1 auto;white-space:nowrap}.study-block{--board-icon-size:104px;padding:.5rem .6rem;gap:.6rem;scroll-margin-top:1rem}.study-block__row{display:grid;grid-template-columns:auto auto auto minmax(0,1fr) auto;align-items:center;gap:.6rem;height:var(--board-icon-size)}.study-block__index{flex:none;min-width:1.25rem;color:var(--muted);font-size:.85rem;font-weight:700;font-variant-numeric:tabular-nums;text-align:right}.study-block__grip{color:var(--muted);display:inline-flex;cursor:grab}.study-block__toggle{display:grid;align-items:center;text-align:left;background:none;border:0;padding:0;min-width:0;cursor:pointer;color:inherit;border-radius:12px;font:inherit}.study-block__toggle:focus-visible{outline:2px solid var(--ring);outline-offset:3px}.study-block__text{display:grid;grid-template-columns:minmax(0,1fr);gap:.15rem;min-width:0}.study-block__title-line{display:flex;align-items:center;gap:.15rem;min-width:0}.study-block__name{flex:0 1 auto;color:rgb(var(--c-bronze-deep-2));font-weight:700;font-size:1rem;line-height:1.25;min-width:0;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.study-block__owner{padding:0 .6rem .5rem 2.4rem}.study-block__owner--inline{padding:0;line-height:1.3}.study-block__meta,.study-block__owner--inline{font-size:.8rem;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.study-block__meta{color:var(--muted)}.study-block__meta-lines{white-space:nowrap}.study-block__actions{display:flex;align-items:center;gap:.35rem}.hint-marker{position:relative;display:inline-flex;align-items:center;justify-content:center;margin-left:.35rem;vertical-align:middle;color:rgb(var(--c-amber-strong))}.hint-marker__label{position:absolute;bottom:calc(100% + .3rem);left:50%;z-index:50;width:max-content;max-width:14rem;padding:.28rem .5rem;border:1px solid rgb(var(--c-gold)/.24);border-radius:.5rem;background:var(--card-solid);box-shadow:var(--shadow-soft);color:var(--foreground);font-size:.75rem;font-weight:500;transform:translateX(-50%);opacity:0;pointer-events:none;transition:opacity .12s ease}.hint-marker:focus .hint-marker__label,.hint-marker:focus-visible .hint-marker__label,.hint-marker:hover .hint-marker__label{opacity:1}.study-block__icon{position:relative;display:inline-flex;padding:0;border:0;border-radius:6px;background:none;cursor:pointer}.study-block__icon:focus-visible{outline:2px solid var(--ring);outline-offset:3px}.study-block__preview{display:none}@media (hover:hover) and (min-width:768px){.study-block__preview{position:absolute;top:50%;left:calc(100% + .6rem);z-index:40;display:block;padding:.4rem;border:1px solid rgb(var(--c-gold)/.24);border-radius:.75rem;background:var(--card-solid);box-shadow:var(--shadow);transform:translateY(-50%);pointer-events:none}.study-block__preview .board-icon--unknown,.study-block__preview .board-icon-frame{--board-icon-size:240px}}.study-block__chevron:disabled{cursor:default;opacity:.45}.study-block__chevron svg{transform:rotate(var(--chevron-turn,0deg));transition:transform .16s ease}.study-block__chevron--open{--chevron-turn:180deg}dialog.lesson-contents-sheet{position:fixed;inset:auto 0 0;width:100%;max-width:100%;max-height:88vh;display:grid;grid-template-rows:auto auto auto minmax(0,1fr);gap:.8rem;margin:0;padding:.75rem 1rem calc(1rem + env(safe-area-inset-bottom, 0px));border:1px solid rgb(var(--c-gold)/.24);border-radius:1rem 1rem 0 0;background:var(--card-solid);color:var(--foreground);box-shadow:var(--shadow)}dialog.lesson-contents-sheet:not([open]){display:none}dialog.lesson-contents-sheet::backdrop{background:rgb(var(--c-black)/.5)}.lesson-contents-sheet__handle{width:2.5rem;height:4px;border-radius:999px;background:rgb(var(--c-slate)/.35);margin:0 auto}dialog.lesson-contents-sheet{--board-icon-size:96px}dialog.lesson-contents-sheet .lesson-rail__list{max-height:none}.lesson-contents-trigger{display:none}@media (max-width:767px){.lesson-rail,.study-block__grip{display:none}.lesson-contents-trigger{display:inline-flex}.lesson-rail,.study-block{--board-icon-size:96px}.study-block__row{gap:.45rem}.study-block__index{min-width:.9rem}.study-block__open-full{display:none}.study-block__row{grid-template-columns:auto auto minmax(0,1fr) auto;grid-template-rows:repeat(2,minmax(0,1fr));row-gap:.3rem}.study-block__icon,.study-block__index{grid-row:1/-1}.study-block__toggle{grid-column:3;grid-row:1}.study-block__actions{display:contents}.study-block__actions>*{grid-column:4}.study-block__actions>.study-block__chevron{grid-column:3;grid-row:2;width:100%}.study-block__actions>.study-block__chevron:disabled{display:none}.study-block__actions:has(>.study-block__chevron:disabled)>.icon-action--danger{grid-column:3;grid-row:2;justify-self:end}.icon-action{width:2.75rem;height:2.75rem}.icon-action--labelled{padding:0}.content-course-builder__embedded-study--bare{margin-top:.25rem}.icon-action__text{display:none}.study-block__meta,.study-block__meta-lines{white-space:normal;overflow:visible}}.study-converter__toggle{display:flex;gap:.5rem;align-items:center;font-weight:600;cursor:pointer}.study-converter__toggle input[type=checkbox]{flex:none;width:auto;margin:0}dialog.study-converter__dialog{display:flex;flex-direction:column;width:min(44rem,calc(100vw - 2rem));max-height:min(80vh,44rem);padding:1rem 1.15rem 1.25rem;overflow:hidden;border:1px solid var(--border);border-radius:14px;background:var(--card-solid);color:var(--foreground)}dialog.study-converter__dialog:not([open]){display:none}dialog.study-converter__dialog::backdrop{background:rgb(var(--c-ink)/.45)}.study-converter__head{display:flex;flex:none;gap:.75rem;align-items:center;justify-content:space-between;margin:0 -1.15rem .75rem;padding:0 1.15rem .6rem;border-bottom:1px solid var(--border)}.study-converter__results,.study-converter__scroll{flex:1 1 auto;min-height:0;overflow-y:auto}.study-converter__head h2{margin:0;font-size:1.05rem}.study-converter__table{width:100%;border-collapse:collapse;font-size:.9rem}.study-converter__table td,.study-converter__table th{padding:.4rem .35rem;border-bottom:1px solid var(--border);text-align:left;vertical-align:middle}.study-converter__table thead th{position:sticky;top:0;z-index:1;background:var(--card-solid)}.study-converter__table input[type=number]{width:6rem}.study-converter__actions{display:flex;justify-content:flex-end;margin-top:.9rem}.study-converter__results ul{display:grid;gap:.3rem;margin:.6rem 0 0;padding:0;list-style:none}.study-converter__results li{display:grid;gap:.1rem;padding:.45rem .55rem;border:1px solid var(--border);border-radius:10px}.study-converter__summary{margin:0}.study-converter__result-title{font-weight:600}.study-converter__result-outcome{color:var(--muted);font-size:.85rem}@media (max-width:560px){.study-converter__table td:nth-child(2),.study-converter__table th:nth-child(2){max-width:8rem;overflow-wrap:anywhere}.study-converter__table input[type=number]{width:4.5rem}}.study-converter__message{margin:0 0 .75rem;padding:.6rem .75rem;border:1px solid var(--border);border-radius:10px}.study-converter__message p{margin:0}.study-converter__message--warning{display:flex;gap:.5rem;align-items:flex-start;border-color:var(--primary-strong);background:rgb(var(--c-parchment-mid)/.45);color:var(--foreground)}.study-converter__message--warning svg{flex:none;margin-top:.15rem;color:var(--primary-strong)}.study-converter__state{display:flex;gap:.25rem;align-items:center;margin-top:.1rem;font-size:.78rem}.study-converter__state--replaces{color:var(--primary-strong)}.study-converter__state--kept{color:var(--muted)}.study-converter__row--locked td{opacity:.68}.study-converter__spin{animation:study-converter-spin 1s linear infinite}@keyframes study-converter-spin{to{transform:rotate(1turn)}}.lesson-info{padding:.85rem .95rem;gap:.5rem}.lesson-info[hidden],.lesson-rail[hidden]{display:none}.lesson-info__header{align-items:center}.lesson-info .editor-panel__header h2,.lesson-info-sheet .editor-panel__header h2{font-size:1rem}.lesson-info__collapse{display:inline-flex;align-items:center;justify-content:center;padding:.2rem;border:0;border-radius:.5rem;background:none;color:var(--muted);cursor:pointer}.lesson-info__collapse:focus-visible,.lesson-info__collapse:hover{color:var(--foreground)}.lesson-info__rows{display:grid;grid-template-columns:minmax(0,1fr)}.lesson-info__row{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:.6rem;min-width:0;padding:.45rem .1rem;border-top:1px solid rgb(var(--c-slate)/.16)}.lesson-info__rows>.lesson-info__row:first-child,.lesson-info__rows>:first-child .lesson-info__row:first-child{border-top:0}.lesson-info__row--group,.lesson-info__row--stack{display:grid;justify-items:stretch;gap:.4rem}.lesson-info__head{display:flex;align-items:center;justify-content:space-between;gap:.5rem;min-width:0}.lesson-info__toggle{flex:1 1 auto;min-width:0;padding:0;border:0;background:none;color:inherit;font:inherit;text-align:left;cursor:pointer}.lesson-info__label{font-size:.88rem;font-weight:650}.lesson-info__row--static{flex-wrap:nowrap;gap:.4rem}.lesson-info__row--static .lesson-info__label{white-space:nowrap}.lesson-info__row--static .lesson-info__end{flex:1 1 auto;justify-content:flex-end}.lesson-info__select{display:inline-grid;flex:1 1 auto;min-width:0;max-width:11rem}.lesson-info__end{display:inline-flex;align-items:center;gap:.35rem;min-width:0;max-width:100%;color:var(--muted);font-size:.85rem}.lesson-info__end .hint-marker{margin-left:0;color:var(--muted)}.lesson-info__chevron,.lesson-info__copy{display:inline-flex;align-items:center;gap:.25rem;padding:.2rem;border:0;border-radius:.5rem;background:none;color:var(--muted);font:inherit;font-size:.78rem;cursor:pointer}.lesson-info__chevron:focus-visible,.lesson-info__chevron:hover,.lesson-info__copy:focus-visible,.lesson-info__copy:hover{color:var(--foreground)}.lesson-info__copy--done{color:rgb(var(--c-gold-strong))}.lesson-info__body{display:grid;grid-template-columns:minmax(0,1fr);gap:.5rem;min-width:0;padding-bottom:.25rem}.lesson-info__body[hidden]{display:none}.lesson-info__body input,.lesson-info__body select,.lesson-info__select select{max-width:100%;font-size:.85rem}.lesson-info__select select{width:100%;min-width:0;padding:.28rem .5rem;text-overflow:ellipsis;border-radius:10px;font-weight:650;color:var(--foreground)}.lesson-info__description{width:100%;min-height:2.2rem;padding:.4rem .6rem;border-radius:12px;font-size:.85rem;resize:none;transition:min-height .12s ease}.lesson-info__description:focus,.lesson-info__description:not(:placeholder-shown){min-height:5rem}.study-converter--row .lesson-info__row{border-top:1px solid rgb(var(--c-slate)/.16)}.lesson-info-icons{display:grid;justify-items:center;align-content:start;gap:.35rem;padding:.5rem .35rem;position:relative;z-index:6}.lesson-info-icons__item{position:relative;display:inline-flex}.lesson-info-icons .icon-action{width:2.6rem;height:2.6rem}.lesson-info-icons__tip{position:absolute;left:calc(100% + .45rem);top:50%;z-index:80;width:max-content;padding:.28rem .5rem;border:1px solid rgb(var(--c-gold)/.24);border-radius:.5rem;background:var(--card-solid);box-shadow:var(--shadow-soft);color:var(--foreground);font-size:.75rem;font-weight:500;transform:translateY(-50%);opacity:0;pointer-events:none;transition:opacity .12s ease}.lesson-info-icons__item:focus-within .lesson-info-icons__tip,.lesson-info-icons__item:hover .lesson-info-icons__tip{opacity:1}.lesson-info-row{padding:.7rem .85rem}.lesson-info-summary{display:flex;align-items:center;justify-content:space-between;gap:.6rem;width:100%;border:0;background:none;color:inherit;font:inherit;text-align:left;cursor:pointer}.lesson-info-summary__text{display:grid;gap:.1rem;min-width:0}.lesson-info-summary__title{font-size:.95rem;font-weight:700}.lesson-info-summary__sub{font-size:.8rem;color:var(--muted)}.lesson-contents-strip{position:sticky;top:0;z-index:5;display:flex;align-items:center;justify-content:space-between;gap:.6rem;padding:.5rem .85rem;border-radius:999px}.lesson-contents-strip__label{font-size:.85rem;font-weight:700}.lesson-contents-strip .icon-action{width:2.2rem;height:2.2rem;border-radius:.6rem}dialog.lesson-info-sheet{grid-template-rows:auto minmax(0,1fr);overflow-y:auto}dialog.lesson-info-sheet .lesson-info__header{align-items:center}@media (min-width:768px){.content-editor__grid.content-editor__grid--info-expanded{grid-template-columns:320px minmax(0,1fr)}.content-editor__grid.content-editor__grid--info-collapsed{grid-template-columns:56px minmax(0,1fr)}.content-editor__grid--info-expanded .lesson-rail__list{max-height:330px}}@media (max-width:767px){.lesson-info,.lesson-info-icons{display:none}}@media (min-width:768px){.lesson-contents-strip,.lesson-info-row{display:none}}@media (max-width:767px){dialog.lesson-info-sheet{grid-template-columns:minmax(0,1fr)}.lesson-info__body--people .study-invite-manager,dialog.lesson-info-sheet .lesson-info__rows{width:100%}.course-editor-page .content-block__toolbar{flex-wrap:wrap}.course-editor-page .content-block__toolbar>.inline-actions{flex-basis:100%;flex-wrap:wrap}}.content-title-actions{align-items:flex-start}.library-create-pill-wrap{display:grid;gap:.35rem;justify-items:start;min-width:0;max-width:100%}.library-create-pill{display:inline-flex;align-items:stretch;max-width:100%;border-radius:1.15rem;overflow:hidden;box-shadow:0 10px 22px rgb(var(--c-gold)/.16)}.library-create-pill__chip{position:relative;display:inline-flex;align-items:center;gap:.5rem;min-width:0;max-width:20rem;padding:.78rem 1.08rem;font-weight:700;background:rgb(var(--c-surface)/.72);border-right:1px solid rgb(var(--c-gold)/.18);border:1px solid rgb(var(--c-gold)/.18);border-right-color:rgb(var(--c-slate)/.16);border-radius:1.15rem 0 0 1.15rem;color:var(--foreground);cursor:pointer}.library-create-pill__chip>svg{flex:0 0 auto}.library-create-pill__chip-text{min-width:0;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.library-create-pill__select{position:absolute;inset:0;width:100%;height:100%;opacity:0;cursor:pointer;font:inherit}.library-create-pill__select:disabled{cursor:progress}.library-create-pill__chip:focus-within{box-shadow:inset 0 0 0 3px rgb(var(--c-teal)/.22)}.library-create-pill__create{flex:0 0 auto;border-left:none;border-radius:0 1.15rem 1.15rem 0;box-shadow:none;white-space:nowrap}.library-create-pill__create:hover{transform:none}.library-create-pill__caption{margin:0;padding-left:.2rem;font-size:.75rem}.content-view-only{display:contents;margin:0;padding:0;border:0;min-width:0}.content-editor__view-only{margin:0}@media (max-width:640px){.content-title-actions>.library-create-pill-wrap{flex-basis:100%;justify-items:stretch}.library-create-pill{display:flex;width:100%}.library-create-pill__chip{flex:1 1 auto;max-width:none}}