/* STELLAR's private reference shelf. Native controls, neutral surfaces, restrained orange. */
.stellar-library{background:var(--brand-bg);color:var(--brand-ink)}.lib-shell{max-width:1360px;margin:auto;padding:44px 32px 80px;font-family:inherit}.lib-page-heading{display:flex;justify-content:space-between;align-items:center;gap:24px;margin-bottom:36px}.lib-eyebrow{font-size:9px;letter-spacing:.17em;font-weight:600;color:var(--brand-muted);margin:0 0 14px}.lib-page-heading h1{font-size:43px;line-height:1.1;letter-spacing:-.055em;margin:0 0 14px;font-weight:650}.lib-title-dot{display:inline-block;width:6px;height:6px;border-radius:50%;background:var(--brand-accent);margin-left:7px}.lib-muted{color:var(--brand-muted);font-size:12px;line-height:1.8}.lib-btn,.lib-sidebar button,.lib-type-tabs button,.lib-dialog button,.lib-lesson-tools button{font-family:inherit;cursor:pointer}.lib-btn{display:inline-flex;gap:10px;align-items:center;justify-content:center;min-height:40px;padding:10px 16px;border:1px solid var(--brand-line);border-radius:8px;background:var(--brand-surface);color:var(--brand-ink);font-size:12px;font-weight:600;text-decoration:none;box-sizing:border-box}.lib-btn.primary{background:var(--brand-primary);color:var(--brand-on-primary);border-color:var(--brand-primary)}.lib-btn:hover{box-shadow:0 2px 8px #00000008}.lib-btn:disabled,.lib-dialog button:disabled{opacity:.5;cursor:wait}.lib-workspace{display:grid;grid-template-columns:212px minmax(0,1fr);gap:36px;align-items:start}.lib-workspace[hidden],.lib-guest[hidden]{display:none}.lib-sidebar{position:sticky;top:96px;padding-right:24px;border-right:1px solid var(--brand-line)}.lib-private{display:flex;gap:7px;align-items:center;font-size:10px;color:var(--brand-muted);margin:0 0 20px}.lib-private svg{width:13px;height:13px;flex:none}.lib-sidebar nav{display:grid;gap:4px}.lib-sidebar nav button{display:flex;justify-content:space-between;align-items:center;width:100%;text-align:left;font-size:12px;font-weight:550;padding:12px;border:0;border-radius:7px;color:var(--brand-muted);background:transparent;overflow-wrap:anywhere}.lib-sidebar nav button[aria-current=page]{background:var(--brand-soft);color:var(--brand-ink);box-shadow:inset 2px 0 var(--brand-accent)}.lib-sidebar-label{display:flex;justify-content:space-between;align-items:center;margin:29px 0 12px;font-size:8px;font-weight:600;letter-spacing:.12em;color:var(--brand-muted)}.lib-sidebar-label button{border:0;background:transparent;color:var(--brand-ink);font-size:22px;padding:0 6px}.lib-sidebar-foot{border-top:1px solid var(--brand-line);margin-top:26px;padding-top:20px;font-size:9px;color:var(--brand-muted);display:grid;gap:14px}.lib-sidebar-foot a{color:var(--brand-ink);text-decoration:none;font-size:11px}.lib-content{min-width:0}.lib-content-heading{display:flex;align-items:center;justify-content:space-between;gap:14px;margin-bottom:20px}.lib-content-heading h2{font-size:26px;letter-spacing:-.04em;margin:0 0 8px}.lib-content-heading .lib-eyebrow{font-size:8px;margin-bottom:10px}.lib-content-heading p{margin-block:0}.lib-toolbar{display:flex;gap:12px;margin-bottom:18px}.lib-search{display:flex;align-items:center;gap:10px;background:var(--brand-surface);border:1px solid var(--brand-line);border-radius:8px;padding:0 13px;flex:1;min-width:0}.lib-search>span{font-size:24px;color:var(--brand-muted)}.lib-search input{border:0;background:transparent;color:var(--brand-ink);width:100%;padding:13px 0;outline:none;font-family:inherit;font-size:12px;min-width:0}.lib-toolbar select{border:1px solid var(--brand-line);border-radius:8px;background:var(--brand-surface);color:var(--brand-ink);padding:0 12px;font-family:inherit;font-size:11px;max-width:165px}.lib-type-tabs{display:flex;gap:6px;border-bottom:1px solid var(--brand-line);margin-bottom:24px}.lib-type-tabs button{border:0;background:transparent;padding:12px 14px;color:var(--brand-muted);font-size:11px;font-weight:550;border-bottom:2px solid transparent}.lib-type-tabs button[aria-current=page]{color:var(--brand-ink);border-bottom-color:var(--brand-accent)}.lib-results{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px}.lib-card{position:relative;border:1px solid var(--brand-line);border-radius:12px;background:var(--brand-surface);overflow:hidden;min-width:0}.lib-card-top{display:flex;align-items:center;justify-content:space-between;padding:18px 20px 0;gap:12px}.lib-track{display:flex;align-items:center;gap:8px;font-size:9px;font-weight:550;letter-spacing:.04em;color:var(--brand-muted)}.lib-track:before{content:'';width:5px;height:5px;background:var(--track-color,#94a3b8);border-radius:50%}.lib-card-menu{position:relative}.lib-card-menu>summary{list-style:none;cursor:pointer;color:var(--brand-muted);padding:4px;display:flex}.lib-card-menu>summary::-webkit-details-marker{display:none}.lib-card-menu svg,.lib-card-pin svg,.lib-card-kind svg{width:16px;height:16px}.lib-menu{position:absolute;right:0;top:28px;min-width:180px;z-index:6;background:var(--brand-surface);border:1px solid var(--brand-line);border-radius:10px;padding:5px;box-shadow:0 8px 32px #0002}.lib-menu button{display:block;width:100%;padding:10px;text-align:left;border:0;border-radius:5px;background:transparent;color:var(--brand-ink);font-family:inherit;font-size:11px;cursor:pointer}.lib-menu button:hover{background:var(--brand-soft)}.lib-card-body{padding:16px 20px 20px}.lib-card-kind{display:flex;gap:7px;align-items:center;font-size:9px;color:var(--brand-muted);margin:0 0 13px}.lib-card h3{font-size:18px;letter-spacing:-.025em;line-height:1.4;margin:0 0 10px;overflow-wrap:anywhere}.lib-card h3 a{color:var(--brand-ink);text-decoration:none}.lib-card h3 a:hover{text-decoration:underline;text-underline-offset:4px}.lib-card-path{font-size:10px;line-height:1.6;color:var(--brand-muted);margin:0 0 14px;overflow-wrap:anywhere}.lib-card-excerpt{font-size:11px;line-height:1.85;color:var(--brand-muted);display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden;white-space:pre-wrap;margin:0}.lib-card-note{font-size:11px;line-height:1.8;border-left:2px solid var(--brand-line);padding:0 0 0 10px;margin:17px 0 0;color:var(--brand-ink);white-space:pre-wrap;overflow-wrap:anywhere}.lib-card-foot{display:flex;justify-content:space-between;align-items:center;border-top:1px solid var(--brand-line);padding:12px 20px;font-size:9px;color:var(--brand-muted);gap:10px}.lib-card-foot a{font-size:10px;font-weight:550;color:var(--brand-ink);text-decoration:none}.lib-card-pin{color:var(--brand-accent-ink);display:flex;gap:5px;align-items:center;font-size:9px}.lib-tags{display:flex;gap:5px;flex-wrap:wrap;margin-top:14px}.lib-tags span{border-radius:4px;background:var(--brand-soft);padding:4px 6px;font-size:8px;color:var(--brand-muted)}.lib-empty,.lib-guest{grid-column:1/-1;text-align:center;padding:64px 24px;border:1px solid var(--brand-line);border-radius:14px;background:var(--brand-surface)}.lib-empty h3,.lib-guest h2{font-size:24px;letter-spacing:-.04em;margin:20px 0 12px}.lib-empty p,.lib-guest p{font-size:12px;line-height:1.8;color:var(--brand-muted);max-width:430px;margin:0 auto 24px}.lib-empty-mark{display:grid;place-items:center;width:64px;height:64px;border:1px solid var(--brand-line);border-radius:18px;margin:auto;box-shadow:0 0 0 7px var(--brand-soft);color:var(--brand-ink)}.lib-empty-mark svg{width:25px;height:25px}.lib-text-link{display:block;color:var(--brand-ink);font-size:11px;margin-top:18px}.lib-load-more{margin:24px auto;display:flex}.lib-load-more[hidden]{display:none}.lib-page-status{font-size:11px;color:var(--brand-muted);margin:0 0 14px}.lib-page-status:empty{display:none}.lib-collection-cover{height:115px;position:relative;background:radial-gradient(ellipse at 70% 25%,#ffffff10,transparent),#202026;display:grid;place-items:center;overflow:hidden;color:#dddde6}.lib-collection-cover:before,.lib-collection-cover:after{content:'';position:absolute;width:130px;height:130px;border:1px solid #ffffff18;border-radius:50%;right:-15px;top:-50px}.lib-collection-cover:after{width:200px;height:200px;right:-50px;top:-85px}.lib-collection-cover svg{width:36px;height:36px;stroke-width:1.2}.lib-collection-card{cursor:pointer;text-align:left;padding:0;color:var(--brand-ink);font-family:inherit}.lib-collection-card .lib-card-body{display:flex;align-items:center;justify-content:space-between}.lib-collection-card h3{font-size:16px;margin:0}.lib-dialog{padding:0;max-width:480px;width:calc(100% - 32px);max-height:85dvh;overflow:auto;border:1px solid var(--brand-line);border-radius:16px;background:var(--brand-surface);color:var(--brand-ink);box-shadow:0 24px 90px #0004;font-family:inherit}.lib-dialog::backdrop{background:#080b1466;backdrop-filter:blur(5px)}.lib-dialog header{position:sticky;top:0;z-index:2;background:var(--brand-surface);display:flex;justify-content:space-between;align-items:center;padding:21px 24px;border-bottom:1px solid var(--brand-line);gap:16px}.lib-dialog h2{font-size:19px;letter-spacing:-.035em;margin:0}.lib-dialog header>button{display:flex;border:0;background:transparent;color:var(--brand-muted);padding:4px}.lib-dialog svg{width:18px;height:18px;flex:none}.lib-dialog-body{padding:20px 24px}.lib-dialog label:not(.lib-collection-choice){display:grid;gap:10px;font-size:11px;font-weight:550}.lib-dialog input:not([type=checkbox]),.lib-dialog textarea{width:100%;box-sizing:border-box;background:var(--brand-surface);border:1px solid var(--brand-line);border-radius:7px;padding:12px;color:var(--brand-ink);font-family:inherit;font-size:12px}.lib-dialog textarea{min-height:160px;line-height:1.8;resize:vertical}.lib-dialog footer{display:flex;justify-content:flex-end;gap:10px;padding:16px 24px;border-top:1px solid var(--brand-line);position:sticky;bottom:0;background:var(--brand-surface)}.lib-form-status{font-size:11px;color:var(--brand-muted);line-height:1.8}.lib-collection-choice{display:flex;justify-content:space-between;align-items:center;padding:13px 0;gap:16px;border-bottom:1px solid var(--brand-line);font-size:12px}.lib-collection-choice span{display:flex;align-items:center;gap:10px;overflow-wrap:anywhere}.lib-collection-choice input{accent-color:var(--brand-primary);width:17px;height:17px;flex:none}.lib-inline-create{display:flex;gap:8px;margin-top:18px}.lib-inline-create button{display:flex;align-items:center;gap:5px;background:var(--brand-soft);border:1px solid var(--brand-line);border-radius:7px;padding:0 10px;color:var(--brand-ink);font-size:11px}.lib-picker-search{margin-bottom:12px}.lib-picker-result{padding:14px 0;border-bottom:1px solid var(--brand-line);display:flex;gap:12px;align-items:flex-start}.lib-picker-result>div{flex:1;min-width:0}.lib-picker-result strong{font-size:12px;line-height:1.6}.lib-picker-result small{display:block;font-size:10px;color:var(--brand-muted);margin-top:5px}.lib-picker-result>button,.lib-picker-result>div>button{border:1px solid var(--brand-line);border-radius:6px;background:var(--brand-surface);color:var(--brand-ink);padding:7px 10px;font-size:10px}.lib-picker-result>div>button{margin-top:8px;border:0;padding:0;color:var(--brand-muted);background:transparent}.lib-picker-section{padding-left:12px;border-left:1px solid var(--brand-line);margin-top:12px}.lib-picker-section .lib-picker-result{padding-block:10px}.lib-toast{position:fixed;left:50%;bottom:26px;transform:translateX(-50%);z-index:10050;padding:14px 18px;border:1px solid var(--brand-line);background:var(--brand-primary);color:var(--brand-on-primary);border-radius:10px;box-shadow:0 8px 28px #0003;display:flex;align-items:center;gap:24px;max-width:calc(100% - 32px);box-sizing:border-box;font:12px system-ui}.lib-toast[hidden]{display:none}.lib-toast button{border:0;background:transparent;color:var(--brand-on-primary);font-weight:650;text-decoration:underline;text-underline-offset:4px;cursor:pointer}.lib-lesson-tools{display:flex;gap:14px;align-items:center;margin:12px 0 20px;clear:both}.lib-lesson-tools button{display:flex;align-items:center;gap:7px;color:var(--brand-ink);background:var(--brand-surface);border:1px solid var(--brand-line);border-radius:7px;padding:8px 11px;font-size:11px}.lib-lesson-tools svg,.lib-section-save svg{width:15px;height:15px;flex:none}.lib-lesson-tools a{font-size:10px;color:var(--brand-muted);text-decoration:none}.lib-section-save{display:inline-flex;vertical-align:middle;align-items:center;justify-content:center;margin-inline-start:10px;width:27px;height:27px;padding:4px;flex:none;border:1px solid transparent;border-radius:5px;background:transparent;color:var(--brand-muted);cursor:pointer;opacity:.65}.lib-section-save:hover,.lib-section-save:focus-visible{opacity:1;background:var(--brand-soft);border-color:var(--brand-line)}[data-lib-save].is-saved{color:var(--brand-accent-ink)}[data-lib-save].is-saved svg{fill:currentColor;stroke-width:1.3}.lib-jump-target{outline:1px solid var(--brand-accent);outline-offset:7px;border-radius:3px}.lib-library-shortcut{display:flex;align-items:center;gap:7px;padding:8px 12px;color:var(--brand-ink);font-size:11px;text-decoration:none}.lib-library-shortcut svg{width:16px;height:16px}.lib-results .lib-post-preview{grid-column:1/-1}.lib-post-preview a{color:var(--brand-ink);font-size:12px}.lib-skeleton{height:220px;background:var(--brand-soft);border-radius:12px}.lib-private-count{font-size:10px;color:var(--brand-muted)}
:where(.lib-shell,.lib-dialog,.lib-lesson-tools) :is(button,a,input,textarea,select,summary):focus-visible{outline:2px solid var(--brand-accent);outline-offset:3px}.lib-search:focus-within{border-color:var(--brand-muted)}
@media(min-width:1600px){.lib-results{grid-template-columns:repeat(3,minmax(0,1fr))}}
@media(max-width:1000px){.lib-workspace{grid-template-columns:175px minmax(0,1fr);gap:24px}.lib-shell{padding:32px 24px 70px}.lib-sidebar{padding-right:16px}.lib-results{grid-template-columns:1fr}}
@media(max-width:680px){.lib-shell{padding:26px 16px 80px}.lib-page-heading{display:block;margin-bottom:24px}.lib-page-heading h1{font-size:35px}.lib-page-heading>.lib-btn{margin-top:10px}.lib-workspace{display:block}.lib-sidebar{position:static;padding:0 0 18px;border-right:0;border-bottom:1px solid var(--brand-line);margin-bottom:24px}.lib-sidebar>nav:first-of-type{display:flex;overflow-x:auto}.lib-sidebar>nav:first-of-type button{white-space:nowrap;width:auto;flex:none}.lib-sidebar .lib-private{margin-bottom:12px}.lib-sidebar-label,.lib-sidebar-foot{display:none}.lib-sidebar #libCollectionNav{display:flex;gap:6px;overflow:auto;margin-top:10px}.lib-sidebar #libCollectionNav button{width:auto;white-space:nowrap;flex:none;font-size:10px;border:1px solid var(--brand-line);padding:7px 10px}.lib-toolbar{gap:8px}.lib-toolbar select{max-width:125px;font-size:10px}.lib-type-tabs button{font-size:10px;padding-inline:10px}.lib-card-body{padding-inline:18px}.lib-content-heading h2{font-size:23px}.lib-content-heading>.lib-btn{font-size:10px;padding:8px;min-height:34px}.lib-dialog-body{padding:18px}.lib-dialog header{padding:18px}.lib-dialog footer{padding:14px 18px;flex-wrap:wrap}.lib-toast{bottom:18px;font-size:11px;gap:12px}.lib-section-save{opacity:.9}.lib-results{gap:12px}.lib-empty{padding:44px 18px}}

.stellar-library [hidden]{display:none!important}.md :is(h4,h5,h6) .lib-section-save{width:22px;height:22px}
@media(max-width:760px){html:root[data-theme] .student-header .student-nav{min-width:0;width:100%;max-width:100%;gap:0;justify-content:space-between;height:51px;overflow:hidden}html:root[data-theme] .student-header .student-nav a{display:flex;flex-direction:column;justify-content:center;align-items:center;gap:4px;flex:1;min-width:0;font-size:9px;padding:3px 0 8px}html:root[data-theme] .student-header .student-nav .student-icon{display:block;width:15px;height:15px}html:root[data-theme] .student-header .student-nav a span{font-size:9px;max-width:100%;overflow:hidden;text-overflow:ellipsis}.lib-sidebar nav button{gap:8px}}

@media(max-width:680px){.lib-sidebar nav{scrollbar-width:none}.lib-sidebar nav::-webkit-scrollbar{display:none}}