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.dialog__content{max-height:400px}.lesson-selection-dialog__section{margin-bottom:20px}.lesson-selection-dialog__section:last-child{margin-bottom:0}.lesson-selection-dialog__section-label{font-family:var(--font-second);color:#767676;text-transform:uppercase;margin-bottom:8px;font-size:14px;font-weight:700;line-height:normal;display:block}.lesson-selection-dialog__search{border:1px solid var(--Grays-Gray-05,#e0e0e0);background:#f9f9f9;border-radius:8px 8px 0 0;padding:12px 16px;position:relative}.lesson-selection-dialog__search-input{border:1px solid var(--Grays-Gray-05,#e0e0e0);font-family:var(--font-second);color:#333;background:#fff;border-radius:8px;outline:none;width:100%;padding:10px 40px 10px 12px;font-size:14px;transition:border-color .2s}.lesson-selection-dialog__search-input::placeholder{color:#ababab}.lesson-selection-dialog__search-input:focus{border-color:var(--color-first)}.lesson-selection-dialog__search-icon{color:#ababab;cursor:pointer;background:0 0;border:none;justify-content:center;align-items:center;padding:4px;display:flex;position:absolute;top:50%;right:24px;transform:translateY(-50%)}.lesson-selection-dialog__search-icon svg{width:18px;height:18px}.lesson-selection-dialog__tree{border-left:1px solid var(--Grays-Gray-05,#e0e0e0);border-right:1px solid var(--Grays-Gray-05,#e0e0e0);max-height:320px;overflow-y:auto}.lesson-selection-dialog__loading{color:#767676;justify-content:center;align-items:center;min-height:60px;padding:20px;font-size:14px;display:flex}.lesson-selection-dialog__empty{text-align:center;color:#767676;padding:20px;font-size:14px}.lesson-selection-dialog__unit{border-bottom:1px solid var(--Grays-Gray-05,#e0e0e0)}.lesson-selection-dialog__unit:last-child{border-bottom:none}.lesson-selection-dialog__unit-row{cursor:pointer;align-items:center;gap:12px;padding:12px 16px;transition:background-color .15s;display:flex}.lesson-selection-dialog__unit-row:hover{background-color:rgba(var(--color-first),.04)}.lesson-selection-dialog__unit-info{flex-direction:column;flex:1;gap:2px;min-width:0;display:flex}.lesson-selection-dialog__unit-name{font-family:var(--font-second);color:#4e4e4e;text-overflow:ellipsis;white-space:nowrap;font-size:16px;font-weight:700;line-height:24px;overflow:hidden}.lesson-selection-dialog__unit-counter{font-family:var(--font-second);color:#767676;text-transform:uppercase;letter-spacing:.3px;font-size:14px;font-weight:700;line-height:normal}.lesson-selection-dialog__unit-chevron{color:#767676;flex-shrink:0}.lesson-selection-dialog__unit-chevron svg{width:16px;height:16px}.lesson-selection-dialog__lessons{padding:0 16px 8px}.lesson-selection-dialog__lesson-row{cursor:pointer;border-radius:6px;align-items:center;gap:12px;padding:8px 12px;transition:background-color .15s;display:flex}.lesson-selection-dialog__lesson-row:hover{background-color:rgba(var(--color-first),.04)}.lesson-selection-dialog__lesson-row--selected{background-color:rgba(var(--color-first),.08)}.lesson-selection-dialog__lesson-name{font-family:var(--font-second);color:#333;text-overflow:ellipsis;white-space:nowrap;font-size:14px;font-weight:500;line-height:20px;overflow:hidden}.lesson-selection-dialog__checkbox{cursor:pointer;background-color:#fff;border:2px solid #e0e0e0;border-radius:4px;flex-shrink:0;justify-content:center;align-items:center;width:20px;height:20px;padding:0;transition:all .2s;display:flex}.lesson-selection-dialog__checkbox svg{width:12px;height:12px}.lesson-selection-dialog__checkbox--checked{background-color:var(--color-first);border-color:var(--color-first)}.lesson-selection-dialog__checkbox--indeterminate{border-color:var(--color-first);background-color:#fff}.lesson-selection-dialog__checkbox--unchecked:hover{border-color:var(--color-first);background-color:rgba(var(--color-first),.05)}.lesson-selection-dialog__checkbox-indeterminate{background-color:var(--color-first);border-radius:1px;width:10px;height:3px}.lesson-selection-dialog__actions{border:1px solid var(--Grays-Gray-05,#e0e0e0);background:#f9f9f9;border-radius:0 0 8px 8px;justify-content:flex-end;align-items:center;gap:16px;padding:12px 8px;display:flex}.lesson-selection-dialog__actions .button:disabled,.lesson-selection-dialog__actions .button[disabled]{color:#ababab;opacity:.6;background:0 0}.lesson-selection-dialog__footer-count{font-family:var(--font-second);color:#4e4e4e;white-space:nowrap;font-size:16px;font-weight:700;line-height:26px}.lesson-selection-dialog__field{margin-bottom:20px}.lesson-selection-dialog__field:last-child{margin-bottom:0}.lesson-selection-dialog__no-lessons{text-align:center;color:var(--color-text-secondary);background-color:var(--color-background-light);border-radius:8px;padding:20px;font-size:14px}.lesson-selection-dialog__error-title{color:var(--ui-color-text-error);font-family:var(--font-second);font-size:14px;font-style:normal;font-weight:500;line-height:20px}.lesson-selection-dialog__error-message{color:var(--ui-color-text-error);font-family:var(--font-second);font-size:16px;font-style:normal;font-weight:500;line-height:24px}.empty-state-analytics{text-align:center;padding:var(--spacing-3xl)var(--spacing-xl);flex-direction:column;justify-content:center;align-items:center;min-height:400px;display:flex}.empty-state-analytics__icon{color:var(--color-text-muted);margin-bottom:var(--spacing-lg);font-size:64px}.empty-state-analytics__message{font-size:var(--font-size-xl);font-weight:var(--font-weight-semibold);color:var(--color-text);margin:0 0 var(--spacing-md)0}.empty-state-analytics__description{font-size:var(--font-size-base);color:var(--color-text-secondary);max-width:500px;margin:0}