.chat-mermaid-modal-container{border-radius:var(--border-radius-01);justify-content:center;align-items:center;width:100%;min-height:300px;padding:20px;display:flex}.chat-mermaid-modal-container .chat-mermaid-modal__diagram{text-align:center}.chat-mermaid-modal-container .chat-mermaid-modal__diagram svg{max-width:100%;height:auto}.tool-indicator{border:1px solid var(--ui-color-brand-fod-primary-a);background-color:#fff;border-radius:8px;align-items:center;margin:8px 0;padding:8px 12px;animation:.3s ease-in-out fadeIn;display:flex}.tool-indicator--error{color:#e04949;background:#fef0ef;border-color:#e04949}.tool-indicator__icon{color:var(--ui-color-brand-fod-primary-a);flex-shrink:0;margin-right:12px}.tool-indicator__icon .icon{color:var(--ui-color-brand-fod-primary-a)}.tool-indicator__content{flex:1;justify-content:space-between;align-items:center;gap:12px;display:flex}.tool-indicator__message{font-family:var(--font-second);color:#333;font-size:16px;font-weight:500;line-height:1.4}@keyframes fadeIn{0%{opacity:0;transform:translate(-50%,10px)}to{opacity:1;transform:translate(-50%)}}.chat-messages{flex-direction:column;flex:1;min-height:0;max-height:100%;padding:16px;display:flex;position:relative;overflow-x:hidden;overflow-y:auto}.chat-messages__container{overflow-y:unset;flex-direction:column;flex:1;gap:10px;display:flex}.chat-messages__container::-webkit-scrollbar{width:8px;height:8px}.chat-messages__container::-webkit-scrollbar-track{background:#f2f2f2}.chat-messages__container::-webkit-scrollbar-thumb{background-color:#ababab;border-radius:20px}.chat-messages__container{scrollbar-width:thin;scrollbar-color:#ababab 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#e0e0e0;justify-content:space-between;align-items:flex-start;padding:8px 16px;display:flex}.chat-dropdown__header-content{flex:1}.chat-dropdown__title{color:#333;font-size:18px;font-weight:600;line-height:28px;font-family:var(--font-first);letter-spacing:normal;margin:0}.chat-dropdown__subtitle{color:#767676;font-size:18px;font-weight:500;line-height:24px;font-family:var(--font-second);letter-spacing:normal;margin:0}.chat-dropdown__content{flex:1;min-height:60px;max-height:60vh;padding:0 8px;overflow-x:hidden;overflow-y:auto}.chat-dropdown__footer{border-top:1px solid #e0e0e0;padding:12px 16px}@keyframes slideDown{0%{opacity:0;transform:translateY(-10px)}to{opacity:1;transform:translateY(0)}}.analytics-filter-bar{align-items:center;gap:16px;display:flex}.analytics-filter-bar__filter{min-width:200px}.tutor-usage-section{flex-direction:column;gap:24px;display:flex}.tutor-usage-section__title{font-family:var(--font-first);color:#333;margin:0;font-size:18px;font-weight:700;line-height:28px}.tutor-usage-section__stats{--tutor-usage-section-stat-min-width:13rem;grid-template-columns:repeat(auto-fit,minmax(var(--tutor-usage-section-stat-min-width),1fr));gap:16px;margin:0;padding:0;list-style:none;display:grid}.tutor-usage-section__stats-item{display:grid}.tutor-usage-section__empty{font-family:var(--font-second);color:#767676;text-align:center;margin:0;padding:24px 0;font-size:14px}.tutor-usage-section__loading{justify-content:center;align-items:center;padding:48px 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var(--ui-color-neutral-grey-300);position:relative}.practice-lesson-selection-dialog__search-input{padding:var(--ui-space-xs)var(--ui-space-xxl)var(--ui-space-xs)var(--ui-space-sm);font-family:var(--ui-font-family-body);font-size:var(--ui-font-size-14);line-height:var(--ui-line-height-20);color:var(--ui-color-text-default);background-color:var(--ui-color-neutral-white);border:var(--ui-stroke-1)solid var(--ui-color-neutral-grey-400);border-radius:var(--ui-radius-xl);outline:none;width:100%;transition:border-color .2s}.practice-lesson-selection-dialog__search-input::placeholder{color:var(--ui-color-neutral-grey-500)}.practice-lesson-selection-dialog__search-input:focus{border-color:var(--ui-color-brand-fod-primary-a)}.practice-lesson-selection-dialog__search-icon{top:50%;right:var(--ui-space-lg);color:var(--ui-color-neutral-grey-500);cursor:pointer;background-color:transparent;border:none;justify-content:center;align-items:center;padding:0;display:inline-flex;position:absolute;transform:translateY(-50%)}.practice-lesson-selection-dialog__tree{max-height:var(--practice-lesson-selection-dialog-tree-max-height);margin:0;padding:0;list-style:none;overflow-y:auto}.practice-lesson-selection-dialog__unit{border-bottom:var(--ui-stroke-1)solid var(--ui-color-neutral-grey-300)}.practice-lesson-selection-dialog__unit:last-child{border-bottom:none}.practice-lesson-selection-dialog__unit-row{align-items:center;gap:var(--ui-space-sm);padding:var(--ui-space-xs)var(--ui-space-md);display:flex}.practice-lesson-selection-dialog__unit-main{justify-content:space-between;align-items:center;gap:var(--ui-space-md);text-align:left;cursor:pointer;background-color:transparent;border:none;flex:1;min-width:0;padding:0;display:flex}.practice-lesson-selection-dialog__unit-main--disabled{cursor:default}.practice-lesson-selection-dialog__unit-main--disabled .practice-lesson-selection-dialog__unit-name{color:var(--ui-color-neutral-grey-400)}.practice-lesson-selection-dialog__unit-info{gap:var(--ui-space-xxs);flex-direction:column;min-width:0;display:flex}.practice-lesson-selection-dialog__unit-name{font-family:var(--ui-font-family-body);font-weight:var(--ui-font-weight-bold);font-size:var(--ui-font-size-16);line-height:var(--ui-line-height-24);color:var(--ui-color-text-default);text-overflow:ellipsis;white-space:nowrap;overflow:hidden}.practice-lesson-selection-dialog__unit-counter{font-family:var(--ui-font-family-body);font-weight:var(--ui-font-weight-bold);font-size:var(--ui-font-size-14);line-height:var(--ui-line-height-20);color:var(--ui-color-neutral-grey-500);text-transform:uppercase}.practice-lesson-selection-dialog__unit-aside{align-items:center;gap:var(--ui-space-xxs);flex-shrink:0;display:inline-flex}.practice-lesson-selection-dialog__no-content-label{font-family:var(--ui-font-family-body);font-weight:var(--ui-font-weight-bold);font-size:var(--ui-font-size-12);line-height:var(--ui-line-height-16);color:var(--ui-color-neutral-grey-500);text-transform:uppercase;white-space:nowrap;flex-shrink:0}.practice-lesson-selection-dialog__chevron{color:var(--ui-color-neutral-grey-600);align-items:center;display:inline-flex}.practice-lesson-selection-dialog__lessons{flex-direction:column;margin:0;padding:0;list-style:none;display:flex}.practice-lesson-selection-dialog__lesson{align-items:center;gap:var(--ui-space-xs);padding:var(--ui-space-xs);padding-left:var(--practice-lesson-selection-dialog-lesson-indent);border-radius:var(--ui-radius-md-lg);cursor:pointer;display:flex}.practice-lesson-selection-dialog__lesson:hover{background-color:var(--ui-color-neutral-grey-100)}.practice-lesson-selection-dialog__lesson--disabled{cursor:default}.practice-lesson-selection-dialog__lesson--disabled:hover{background-color:transparent}.practice-lesson-selection-dialog__lesson--disabled 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var(--ui-color-neutral-grey-300);display:flex}.practice-lesson-selection-dialog__actions .button{flex:none;width:auto;min-width:0}.practice-lesson-selection-dialog__actions .button:disabled{opacity:.5;background-color:transparent}.practice-lesson-selection-dialog__actions .button--color-primary-outlined{background-color:var(--ui-color-neutral-white);padding-top:0!important;padding-bottom:0!important}.practice-lesson-selection-dialog__state{padding:var(--ui-space-lg);font-family:var(--ui-font-family-body);font-size:var(--ui-font-size-16);line-height:var(--ui-line-height-24);color:var(--ui-color-text-secondary);text-align:center;justify-content:center;align-items:center;display:flex}.practice-lesson-selection-dialog__warning{align-items:center;gap:var(--ui-space-xs);padding:var(--ui-space-md)var(--ui-space-xs);background-color:var(--ui-color-blue-100);border:var(--ui-stroke-1)solid var(--ui-color-blue-300);border-radius:var(--ui-radius-xl);display:flex}.practice-lesson-selection-dialog__warning-mascot{width:var(--practice-lesson-selection-dialog-mascot-size);height:var(--practice-lesson-selection-dialog-mascot-size);background-image:var(--tangerine-ai-bot-help);background-position:50%;background-repeat:no-repeat;background-size:contain;flex-shrink:0}.practice-lesson-selection-dialog__warning-text{font-family:var(--ui-font-family-body);font-size:var(--ui-font-size-16);line-height:var(--ui-line-height-24);color:var(--ui-color-neutral-grey-900)}.practice-lesson-selection-dialog__footer-count{font-family:var(--ui-font-family-body);font-weight:var(--ui-font-weight-bold);font-size:var(--ui-font-size-16);line-height:var(--ui-line-height-26);color:var(--ui-color-text-default)}.practice-status-chip{align-items:center;gap:var(--ui-space-xs);padding:var(--ui-space-xxs)var(--ui-space-sm);font-family:var(--ui-font-family-body);font-weight:var(--ui-font-weight-bold);font-size:var(--ui-font-size-14);line-height:var(--ui-line-height-20);white-space:nowrap;border-radius:var(--ui-radius-xxl);flex-shrink:0;display:inline-flex}.practice-status-chip__emoji{font-size:var(--ui-font-size-20);line-height:1}.practice-status-chip--mastered{color:var(--ui-color-green-800);background-color:var(--ui-color-green-200)}.practice-status-chip--in-progress{color:var(--ui-color-blue-800);background-color:var(--ui-color-blue-200)}.practice-status-chip--not-started{color:var(--ui-color-neutral-grey-800);background-color:var(--ui-color-neutral-grey-200)}.practice-status-chip--blocked{color:var(--ui-color-red-800);background-color:var(--ui-color-red-200)}