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20px;display:flex}.toss-panel>.toss-row:first-child{border-top:0}.toss-row:hover{background:var(--nova-hover-bg)}.toss-row__body{flex:1;gap:4px;min-width:0;display:grid}.toss-row__body strong{letter-spacing:-.03em;text-overflow:ellipsis;white-space:nowrap;font-size:16px;font-weight:700;overflow:hidden}.toss-row__body small{color:var(--nova-text-tertiary);text-overflow:ellipsis;white-space:nowrap;font-size:13px;line-height:1.45;overflow:hidden}.toss-row__summary{color:var(--nova-text-secondary);letter-spacing:-.02em;text-overflow:ellipsis;white-space:nowrap;font-size:13px;font-weight:500;line-height:1.45;overflow:hidden}.toss-row__status{flex:none;font-size:13px;font-weight:600}.toss-row__status--relink{color:var(--nova-danger)}.toss-row__status--review{color:var(--nova-warning)}.toss-row__status--continue{color:var(--nova-primary)}.toss-row__status--done{color:var(--nova-success)}.toss-row__chevron{color:var(--nova-text-tertiary);flex:none}.toss-home 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0;display:flex}.toss-timeline__row:first-child{border-top:0;padding-top:12px}.toss-timeline__copy{flex:1;gap:6px;min-width:0;display:grid}.toss-timeline__date{color:var(--text-tertiary);font-size:13px;font-weight:500}.toss-timeline__title{color:var(--nova-text-primary);letter-spacing:-.03em;text-overflow:ellipsis;white-space:nowrap;font-size:16px;font-weight:700;overflow:hidden}.toss-timeline__summary{color:var(--text-secondary);-webkit-line-clamp:2;-webkit-box-orient:vertical;font-size:14px;font-weight:500;line-height:1.45;display:-webkit-box;overflow:hidden}.toss-timeline__facts{color:var(--nova-text-secondary);flex-wrap:wrap;gap:8px 12px;font-size:13px;font-weight:600;display:flex}.toss-timeline__chevron{color:#b0b8c1;flex:none;margin-top:28px}[data-theme=dark] .toss-timeline__more,[data-theme=dark] .toss-timeline__summary{color:var(--nova-text-secondary)}[data-theme=dark] .toss-timeline__date,[data-theme=dark] .toss-timeline__chevron{color:var(--nova-text-tertiary)}[data-theme=dark] .toss-timeline__row{border-top-color:var(--nova-border-subtle)}.toss-row--split{cursor:default;padding:0}.toss-row--split:hover{background:0 0}.toss-row__main{min-width:0;color:inherit;text-align:left;cursor:pointer;background:0 0;border:0;flex:1;align-items:center;gap:12px;padding:16px 8px 16px 20px;display:flex}.toss-row--split:hover .toss-row__main{background:var(--nova-hover-bg)}.toss-row__side{color:var(--nova-text-tertiary);cursor:pointer;background:0 0;border:0;flex:none;padding:0 18px;font-size:13px;font-weight:600}.toss-row__side:hover{background:var(--nova-hover-bg);color:var(--nova-danger)}.toss-row__side:disabled{cursor:not-allowed;opacity:.45}.toss-row__sides{flex:none;display:flex}.toss-row__main--edit{cursor:default;gap:8px;display:grid}.toss-class-create{border:1px solid var(--nova-border-subtle);border-radius:var(--nova-radius-xl);background:var(--nova-raised);box-shadow:var(--nova-shadow-card);grid-template-columns:minmax(240px,.8fr) minmax(360px,1.2fr);align-items:center;gap:12px 24px;padding:18px;display:grid}.toss-class-create__intro{align-items:center;gap:12px;min-width:0;display:flex}.toss-class-create__icon{border-radius:var(--nova-radius-md);background:var(--nova-primary-soft);width:44px;height:44px;color:var(--nova-primary);flex:0 0 44px;place-items:center;display:grid}.toss-class-create__intro>span:last-child{gap:4px;min-width:0;display:grid}.toss-class-create__intro strong{color:var(--nova-text-primary);letter-spacing:-.03em;font-size:15px;font-weight:750}.toss-class-create__intro small{color:var(--nova-text-tertiary);text-overflow:ellipsis;white-space:nowrap;font-size:12px;line-height:1.45;overflow:hidden}.toss-class-create__form{grid-template-columns:minmax(0,1fr) auto;align-items:center;gap:8px;display:grid}.toss-class-create__form 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var(--nova-border-subtle);border-radius:var(--nova-radius-xl);background:var(--nova-raised);box-shadow:var(--nova-shadow-card);transition:box-shadow .2s var(--nova-ease),transform .2s var(--nova-ease);grid-template-columns:minmax(0,1fr) auto;display:grid;overflow:hidden}.toss-class-card:hover{box-shadow:var(--nova-shadow-hover);transform:translateY(-1px)}.toss-class-card.is-editing{grid-template-columns:1fr}.toss-class-card__open{min-width:0;color:inherit;text-align:left;cursor:pointer;background:0 0;border:0;grid-template-columns:52px minmax(0,1fr) 20px;align-items:center;gap:16px;padding:16px;display:grid}.toss-class-card__avatar{background:var(--nova-primary-soft);width:52px;height:52px;color:var(--nova-primary);border-radius:15px;place-items:center;font-size:19px;font-weight:800;display:grid}.toss-class-card__content{gap:6px;min-width:0;display:grid}.toss-class-card__title{align-items:center;gap:8px;min-width:0;display:flex}.toss-class-card__title 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strong{color:var(--nova-primary)}.toss-class-status{white-space:nowrap;border-radius:10px;justify-content:center;align-items:center;gap:6px;min-width:86px;height:30px;padding:0 10px;font-size:12px;font-weight:700;line-height:1;display:inline-flex}.toss-class-status--attention{background:var(--nova-warning-soft);color:var(--nova-warning)}.toss-class-status--active{background:var(--nova-success-soft);color:var(--nova-success)}.toss-class-status--empty{background:var(--nova-canvas);color:var(--nova-text-secondary)}.toss-class-card__chevron{color:var(--nova-text-tertiary);transition:color .18s,transform .18s}.toss-class-card__open:hover .toss-class-card__chevron{color:var(--nova-primary);transform:translate(2px)}.toss-class-card__actions{border-left:1px solid var(--nova-border-subtle);background:var(--nova-canvas);align-items:center;gap:6px;padding:10px;display:flex}.toss-class-card__action{background:var(--nova-raised);height:36px;color:var(--nova-text-secondary);letter-spacing:-.02em;white-space:nowrap;cursor:pointer;border:0;border-radius:10px;justify-content:center;align-items:center;gap:5px;padding:0 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12px}.toss-class-card__edit-field .toss-field-error{margin-bottom:0}.toss-class-create__submit:focus-visible,.toss-class-card__open:focus-visible,.toss-class-card__action:focus-visible{outline:2px solid var(--nova-focus-ring);outline-offset:2px}.toss-filters{flex-wrap:wrap;gap:8px;display:flex}.studio-content:has(.lessons-page){background:var(--background);padding-left:clamp(28px,3vw,32px);padding-right:clamp(28px,3vw,32px)}.lessons-page{flex-direction:column;min-width:0;display:flex}.lessons-page__head{justify-content:space-between;align-items:flex-start;gap:16px;display:flex}.lessons-page__heading h1{color:var(--text-primary);letter-spacing:-.8px;margin:0;font-size:30px;font-weight:700;line-height:1.35}.lessons-page__heading p{color:var(--text-tertiary);letter-spacing:-.2px;margin:8px 0 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var(--border);background:var(--surface);border-radius:16px;grid-template-columns:repeat(4,minmax(0,1fr));display:grid}.lessons-stat{box-sizing:border-box;flex-direction:column;gap:4px;padding:12px 18px;display:flex;position:relative}.lessons-stat+.lessons-stat:before{content:"";background:var(--divider);width:1px;position:absolute;top:12px;bottom:12px;left:0}.lessons-stat span{color:var(--text-tertiary);font-size:12px;font-weight:550}.lessons-stat strong{color:var(--text-primary);letter-spacing:-.4px;font-variant-numeric:tabular-nums;font-size:18px;font-weight:700;line-height:1}.lessons-toolbar{border:1px solid var(--border);background:var(--surface);border-radius:16px;display:grid}.lessons-toolbar__top{align-items:center;gap:8px;padding:11px 12px;display:flex}.lessons-search{flex:1;min-width:200px;display:block;position:relative}.lessons-search svg{color:var(--text-tertiary);pointer-events:none;position:absolute;top:50%;left:14px;transform:translateY(-50%)}.lessons-search 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.toss-select__trigger:hover:not(:disabled),.lessons-sort .toss-select.is-open .toss-select__trigger{background:var(--surface-hover);box-shadow:none;border:0}.lessons-filter-panel{border-top:1px solid var(--divider);background:color-mix(in srgb,var(--background)56%,var(--surface));border-radius:0 0 16px 16px;padding:16px}.lessons-filter-panel__head{justify-content:space-between;align-items:center;gap:12px;margin-bottom:14px;display:flex}.lessons-filter-panel__head>strong{color:var(--text-secondary);font-size:13px;font-weight:650}.lessons-filter-panel__head button{height:30px;color:var(--text-tertiary);cursor:pointer;background:0 0;border:0;border-radius:9px;outline:none;align-items:center;gap:5px;padding:0 8px;font-size:12px;font-weight:600;display:inline-flex}.lessons-filter-panel__head button:hover{background:var(--surface-hover);color:var(--blue)}.lessons-filter-panel__head button:focus-visible{box-shadow:0 0 0 3px #3182f626}.lessons-filter-panel__grid{grid-template-columns:repeat(4,minmax(0,1fr));gap:10px;display:grid}.lessons-filter-field{gap:7px;min-width:0;display:grid}.lessons-filter-field>span{color:var(--text-tertiary);padding-left:2px;font-size:12px;font-weight:600}.lessons-filter-panel__grid .toss-select__trigger{border:1px solid var(--border);background:var(--surface);min-height:40px;box-shadow:none;color:var(--text-secondary);border-radius:11px;padding:0 11px;font-size:13px;font-weight:550}.lessons-filter-panel__grid .toss-select__trigger:hover:not(:disabled),.lessons-filter-panel__grid .toss-select.is-open .toss-select__trigger{border-color:var(--blue-border);background:var(--blue-surface);box-shadow:none;color:var(--text-primary)}.lessons-list{gap:22px;margin-top:26px;display:grid}.lessons-group{min-width:0}.lessons-group__head{justify-content:space-between;align-items:baseline;gap:12px;padding:0 4px;display:flex}.lessons-group__head h2{color:var(--text-primary);letter-spacing:-.4px;margin:0;font-size:17px;font-weight:700}.lessons-group__head span{color:var(--text-tertiary);font-size:13px;font-weight:500}.lessons-group__rows{border:1px solid var(--border);background:var(--surface);border-radius:18px;margin-top:10px;box-shadow:0 1px 3px #17191d06}.lessons-row{align-items:stretch;transition:background-color .16s;display:flex;position:relative}.lessons-row:hover{background:var(--surface-hover)}.lessons-row:first-child,.lessons-row:first-child .lessons-row__open{border-top-left-radius:18px}.lessons-row:first-child{border-top-right-radius:18px}.lessons-row:last-child,.lessons-row:last-child .lessons-row__open{border-bottom-left-radius:18px}.lessons-row:last-child{border-bottom-right-radius:18px}.lessons-row+.lessons-row{border-top:1px solid var(--divider)}.lessons-row.is-menu-open{z-index:3}.lessons-row__open{min-width:0;color:inherit;text-align:left;cursor:pointer;background:0 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