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table{border-collapse:collapse;table-layout:fixed;width:100%;margin:0 0 1rem}.richtext-editor .ck.ck-content th,.richtext-editor .ck.ck-content td,.richtext-rendered th,.richtext-rendered td{border:1px solid var(--line);vertical-align:top;text-align:left;padding:10px 12px}.richtext-editor .ck.ck-content th,.richtext-rendered th{background:var(--surface-soft)}@supports (color:color-mix(in lab, red, red)){.richtext-editor .ck.ck-content th,.richtext-rendered th{background:color-mix(in srgb, var(--surface-soft) 82%, transparent)}}.richtext-editor .ck.ck-content th,.richtext-rendered th{font-weight:700}.richtext-rendered{color:var(--richtext-text);line-height:1.8}.richtext-rendered-compact{font-size:.98rem}.search-select{gap:10px;display:grid}.search-select-popup{position:relative}.search-results{gap:8px;max-height:280px;padding-right:4px;display:grid;overflow-y:auto}.search-results-popup{z-index:20;border:1px solid var(--input-line);border-radius:var(--radius-md);background:var(--surface-popup);max-height:320px;box-shadow:var(--shadow);-webkit-backdrop-filter:blur(18px);backdrop-filter:blur(18px);padding:10px;position:absolute;top:calc(100% + 8px);left:0;right:0}.search-result-item{border:1px solid var(--input-line);border-radius:var(--radius-sm);background:var(--surface-raised);text-align:left;cursor:pointer;gap:4px;width:100%;padding:12px 14px;transition:transform .16s,background .16s,border-color .16s;display:grid}.search-result-item:hover{transform:translateY(-1px)}.search-result-item strong{color:var(--text)}.search-result-item span,.search-empty{color:var(--muted);margin:0;font-size:.92rem}.search-empty{padding:8px 10px}.search-result-item.active{background:linear-gradient(135deg, var(--accent), var(--panel-strong))}@supports (color:color-mix(in lab, red, red)){.search-result-item.active{background:linear-gradient(135deg, color-mix(in srgb, var(--accent) 16%, transparent), var(--panel-strong))}}.search-result-item.active{border-color:var(--accent)}@supports (color:color-mix(in lab, red, red)){.search-result-item.active{border-color:color-mix(in srgb, var(--accent) 24%, transparent)}}.sync-status-card{border:1px solid var(--accent);gap:10px;margin-top:18px;padding:16px 18px;display:grid}@supports (color:color-mix(in lab, red, red)){.sync-status-card{border:1px solid color-mix(in srgb, var(--accent) 20%, transparent)}}.sync-status-card{border-radius:var(--radius-md);background:var(--surface-tint)}.sync-status-head{align-items:center;gap:10px;display:flex}.spinner-dot{background:var(--accent);border-radius:999px;width:14px;height:14px;animation:1.2s ease-out infinite sync-pulse;box-shadow:0 0 #2f6fb447}.sync-runtime{color:var(--accent-strong);margin:0;font-size:.92rem;font-weight:600}.sync-error{color:#b42318;margin:0;font-size:.92rem;font-weight:600}@keyframes sync-pulse{0%{transform:scale(.92);box-shadow:0 0 #2f6fb447}70%{transform:scale(1);box-shadow:0 0 0 12px #2f6fb400}to{transform:scale(.92);box-shadow:0 0 #2f6fb400}}.section-divider{border-top:1px solid var(--line);justify-content:space-between;margin-top:10px;padding-top:12px}.section-divider h4{margin:0;font-size:1rem}.lesson-stack,.block-stack{gap:16px;display:grid}.lesson-card,.block-card,.list-card,.content-block{border:1px solid var(--line);border-radius:var(--radius-lg);background:var(--surface-raised)}.lesson-card,.block-card,.content-block{padding:18px}.course-cover-card{background:linear-gradient(180deg, var(--accent), var(--surface-raised));gap:18px;padding:20px;display:grid}@supports (color:color-mix(in lab, red, red)){.course-cover-card{background:linear-gradient(180deg, color-mix(in srgb, var(--accent) 7%, transparent), var(--surface-raised))}}.course-cover-toolbar{align-items:start}.course-cover-toolbar h4{margin:4px 0 0;font-size:1.35rem;line-height:1.2}.course-cover-grid{gap:18px}.lesson-view{gap:18px;scroll-margin-top:110px;display:grid}.lesson-view h3{font-size:clamp(1.8rem,3vw,2.35rem);line-height:1.1}.course-content-layout{gap:20px;display:grid}.course-content-layout.with-toc{grid-template-columns:minmax(240px,300px) minmax(0,1fr);align-items:start}.lesson-toc-shell{position:relative}.lesson-toc{align-self:start;gap:16px;height:fit-content;padding:20px;display:grid}.lesson-toc.is-placeholder{visibility:hidden;pointer-events:none}.lesson-toc.is-floating{z-index:20;position:fixed}.lesson-toc-head{gap:6px;display:grid}.lesson-toc-head h3{margin:0;font-size:1.1rem}.lesson-toc-nav{gap:10px;display:grid}.lesson-toc-link{border:1px solid var(--line);border-radius:var(--radius-lg);background:var(--surface-raised);color:var(--text);text-align:left;cursor:pointer;grid-template-columns:36px minmax(0,1fr);align-items:start;gap:12px;padding:12px 14px;transition:border-color .18s,transform .18s,background .18s;display:grid}.lesson-toc-link:hover{border-color:var(--accent)}@supports (color:color-mix(in lab, red, red)){.lesson-toc-link:hover{border-color:color-mix(in srgb, var(--accent) 34%, transparent)}}.lesson-toc-link:hover{background:var(--accent)}@supports (color:color-mix(in lab, red, red)){.lesson-toc-link:hover{background:color-mix(in srgb, var(--accent) 8%, var(--surface-raised))}}.lesson-toc-link:hover{transform:translateY(-1px)}.lesson-toc-index{background:var(--accent);border-radius:999px;justify-content:center;align-items:center;width:36px;height:36px;display:inline-flex}@supports (color:color-mix(in lab, red, red)){.lesson-toc-index{background:color-mix(in srgb, var(--accent) 12%, transparent)}}.lesson-toc-index{color:var(--accent-strong);font-weight:700}.lesson-toc-title{align-self:center;font-weight:600;line-height:1.35}.lesson-toggle{width:100%;color:inherit;text-align:left;cursor:pointer;background:0 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(width<=640px){.login-hero-preview-head{flex-direction:column;align-items:flex-start}}@property --tw-translate-x{syntax:"*";inherits:false;initial-value:0}@property --tw-translate-y{syntax:"*";inherits:false;initial-value:0}@property --tw-translate-z{syntax:"*";inherits:false;initial-value:0}@property --tw-rotate-x{syntax:"*";inherits:false}@property --tw-rotate-y{syntax:"*";inherits:false}@property --tw-rotate-z{syntax:"*";inherits:false}@property --tw-skew-x{syntax:"*";inherits:false}@property --tw-skew-y{syntax:"*";inherits:false}@property --tw-space-x-reverse{syntax:"*";inherits:false;initial-value:0}@property --tw-border-style{syntax:"*";inherits:false;initial-value:solid}@property --tw-leading{syntax:"*";inherits:false}@property --tw-font-weight{syntax:"*";inherits:false}@property --tw-tracking{syntax:"*";inherits:false}@property --tw-shadow{syntax:"*";inherits:false;initial-value:0 0 #0000}@property --tw-shadow-color{syntax:"*";inherits:false}@property --tw-shadow-alpha{syntax:"<percentage>";inherits:false;initial-value:100%}@property --tw-inset-shadow{syntax:"*";inherits:false;initial-value:0 0 #0000}@property --tw-inset-shadow-color{syntax:"*";inherits:false}@property --tw-inset-shadow-alpha{syntax:"<percentage>";inherits:false;initial-value:100%}@property --tw-ring-color{syntax:"*";inherits:false}@property --tw-ring-shadow{syntax:"*";inherits:false;initial-value:0 0 #0000}@property --tw-inset-ring-color{syntax:"*";inherits:false}@property --tw-inset-ring-shadow{syntax:"*";inherits:false;initial-value:0 0 #0000}@property --tw-ring-inset{syntax:"*";inherits:false}@property --tw-ring-offset-width{syntax:"<length>";inherits:false;initial-value:0}@property --tw-ring-offset-color{syntax:"*";inherits:false;initial-value:#fff}@property --tw-ring-offset-shadow{syntax:"*";inherits:false;initial-value:0 0 #0000}@property --tw-blur{syntax:"*";inherits:false}@property --tw-brightness{syntax:"*";inherits:false}@property --tw-contrast{syntax:"*";inherits:false}@property --tw-grayscale{syntax:"*";inherits:false}@property --tw-hue-rotate{syntax:"*";inherits:false}@property --tw-invert{syntax:"*";inherits:false}@property --tw-opacity{syntax:"*";inherits:false}@property --tw-saturate{syntax:"*";inherits:false}@property --tw-sepia{syntax:"*";inherits:false}@property --tw-drop-shadow{syntax:"*";inherits:false}@property --tw-drop-shadow-color{syntax:"*";inherits:false}@property --tw-drop-shadow-alpha{syntax:"<percentage>";inherits:false;initial-value:100%}@property --tw-drop-shadow-size{syntax:"*";inherits:false}@property --tw-duration{syntax:"*";inherits:false}@property --tw-ease{syntax:"*";inherits:false}@property --tw-content{syntax:"*";inherits:false;initial-value:""}@keyframes spin{to{transform:rotate(360deg)}}@keyframes ping{75%,to{opacity:0;transform:scale(2)}}@keyframes pulse{50%{opacity:.5}}@keyframes bounce{0%,to{animation-timing-function:cubic-bezier(.8,0,1,1);transform:translateY(-25%)}50%{animation-timing-function:cubic-bezier(0,0,.2,1);transform:none}}