.chat-header-container{background-color:#fff}.chat-header{--chat-header-height:64px;--chat-header-padding:var(--ui-space-xs);--chat-header-divider-height:30px;height:var(--chat-header-height);padding:0 var(--chat-header-padding);border-bottom:var(--ui-stroke-1)solid var(--ui-color-neutral-grey-200);background-color:#fff;justify-content:space-between;align-items:center;display:flex;position:relative}.chat-header__left,.chat-header__right{align-items:center;gap:var(--ui-space-xs);flex:none;display:flex}.chat-header__left{justify-content:flex-start}.chat-header__center{flex:auto;justify-content:center;align-items:center;display:flex}.chat-header__right{justify-content:flex-end}.chat-header__close-button.chat-button--icon-only.chat-button--small{padding:var(--ui-space-xxxs)var(--ui-space-xs)}.chat-header__divider{width:var(--ui-stroke-1);height:var(--chat-header-divider-height);background-color:var(--ui-color-neutral-grey-200)}.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}.chat-checkbox{font-size:14px;display:block}.chat-checkbox__label{cursor:pointer;-webkit-user-select:none;user-select:none;align-items:flex-start;gap:8px;display:flex}.chat-checkbox__input-wrapper{flex-shrink:0;margin-top:2px;position:relative}.chat-checkbox__input{opacity:0;width:0;height:0;position:absolute}.chat-checkbox__custom{background-color:#fff;border:2px solid #e0e0e0;border-radius:4px;justify-content:center;align-items:center;width:20px;height:20px;transition:all .2s;display:flex;position:relative}.chat-checkbox__custom:after{content:"";opacity:0;border-radius:4px;transition:opacity .2s;position:absolute;top:-2px;bottom:-2px;left:-2px;right:-2px}.chat-checkbox__checkmark{opacity:0;font-size:12px;transition:all .2s;transform:scale(.8)}.chat-checkbox__content{flex-direction:column;flex:1;gap:4px;display:flex}.chat-checkbox__text{font-family:var(--font-second);color:#333;font-size:14px;font-weight:600;line-height:1.6}.chat-checkbox__description{color:#767676;font-size:12px;line-height:1.4}.chat-checkbox__label:hover .chat-checkbox__custom{border-color:var(--color-first);background-color:var(--color-first-alpha)}.chat-checkbox__input:checked+.chat-checkbox__custom{background-color:var(--color-first);border-color:var(--color-first)}.chat-checkbox__input:checked+.chat-checkbox__custom .chat-checkbox__checkmark{opacity:1;transform:scale(1)}.chat-checkbox__label:active .chat-checkbox__custom{background-color:var(--color-first);border-color:var(--color-first);transform:scale(.95)}.chat-checkbox__label:active .chat-checkbox__custom:after{opacity:.2;background-color:var(--color-first)}.chat-checkbox__input:focus-visible+.chat-checkbox__custom{outline:2px solid var(--color-first);outline-offset:2px}.chat-checkbox--disabled .chat-checkbox__label{cursor:not-allowed}.chat-checkbox--disabled .chat-checkbox__custom{opacity:.5;background-color:#f2f2f2;border-color:#e0e0e0}.chat-checkbox--disabled .chat-checkbox__text,.chat-checkbox--disabled .chat-checkbox__description{opacity:.5}.chat-checkbox--disabled .chat-checkbox__label:hover .chat-checkbox__custom{background-color:#f2f2f2;border-color:#e0e0e0}.chat-checkbox--position-right .chat-checkbox__label{flex-direction:row-reverse;justify-content:space-between}.chat-checkbox--position-right .chat-checkbox__input-wrapper{margin-top:0}.chat-checkbox--position-right .chat-checkbox__content{flex:1}.chat-message{margin-bottom:10px;display:block;position:relative}.chat-bubble{gap:8px;margin-bottom:0;display:flex}.chat-bubble__avatar{background-color:transparent;background-image:var(--tangerine-ai-bot);background-position:50%;background-repeat:no-repeat;background-size:cover;border-radius:0%;flex-shrink:0;justify-content:center;align-self:flex-end;align-items:center;width:32px;height:32px;margin-bottom:0;display:flex;overflow:hidden}.chat-bubble__avatar--error{background-image:var(--tangerine-ai-bot-error)}.chat-bubble__content{flex-direction:column;flex:1;align-items:flex-start;gap:8px;display:flex}.chat-bubble__message-group{flex-direction:column;align-items:flex-start;width:100%;display:flex}.chat-bubble__message{word-wrap:break-word;color:#333;border:1px solid #e0e0e0;border-radius:8px;flex:1;font-size:16px;line-height:24px}.chat-bubble__message-content{padding:8px}.chat-bubble__message .markdown-container p{margin-bottom:.5rem}.chat-bubble__message .markdown-container p:last-child{margin-bottom:0}.chat-bubble__message .chat-d3-card{width:100%}.chat-bubble__message .chat-d3-card:first-child{margin-top:0}.chat-bubble__message .chat-d3-card:last-child{margin-bottom:0}.chat-bubble__image{margin-bottom:8px;padding:0 8px}.chat-bubble__image img{cursor:pointer;border-radius:8px;max-width:100%;max-height:300px;display:block}.chat-bubble__attachments{flex-direction:column;gap:8px;display:flex}.chat-bubble__attachments .chat-bubble__image{margin-bottom:0}.chat-bubble--bot .chat-bubble__content,.chat-bubble--bot .chat-bubble__message-group{width:100%}.chat-bubble--bot .chat-bubble__message{background-color:#fff;border-radius:8px 8px 8px 0;width:100%}.chat-bubble--user{flex-direction:row-reverse}.chat-bubble--user .chat-bubble__content{flex-direction:column;align-items:flex-end;display:flex}.chat-bubble--user .chat-bubble__message-group{align-self:flex-end;width:auto;max-width:80%}.chat-bubble--user .chat-bubble__message{background-color:var(--ui-color-brand-fod-lighter);border:1px solid var(--ui-color-brand-fod-light);color:#333;border-radius:8px 8px 0;width:100%}.chat-bubble--just-posted .chat-bubble__message{border-style:solid;border-width:1px;border-image:linear-gradient(111.12deg,var(--ui-color-brand-fod-primary-a)12.58%,var(--ui-color-brand-fod-dark)100%)1}.chat-bubble__tool-indicators{flex-direction:column;gap:8px;width:100%;display:flex}.chat-message__bubble--error .chat-bubble__message{background:#fef0ef;border:1px solid #e04949}.chat-message--streaming .chat-bubble__content .typing-indicator{background-color:#fff;border:1px solid #f2f2f2;border-radius:8px 8px 8px 0;width:100%;padding:12px 16px}.chat-message__actions{align-items:center;gap:8px;margin-top:4px;margin-left:40px;display:flex}.chat-message__audio-button--loading{opacity:.6;cursor:wait}.chat-message--highlighted .chat-bubble--user .chat-bubble__message{border-color:#e04949}.chat-message__flag-button{transition:all .2s}.chat-message__flag-button--flagged{opacity:.7;cursor:default}.chat-message__flag-button--flagged:hover{opacity:.7}.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 #f2f2f2}.chat-messages__empty-state{text-align:center;color:#767676;flex-direction:column;flex:1;justify-content:center;align-items:center;gap:16px;padding:32px 16px;display:flex}.chat-messages__empty-state-content{max-width:320px}.chat-messages__empty-state-content h3{color:#333;margin-bottom:12px;font-size:32px}.chat-messages__empty-state-content p{margin:0;font-size:16px;line-height:1.5}.chat-messages__toast{color:#fff;background-color:#333;border-radius:20px;align-items:center;gap:8px;padding:8px 16px;font-size:14px;animation:.3s ease-in-out fadeIn;display:flex;position:absolute;bottom:16px;left:50%;transform:translate(-50%)}.chat-messages--loading{justify-content:center;align-items:center;min-height:200px;display:flex}.chat-messages__loading{padding:16px}.chat-message-container{flex-direction:column;display:flex;position:relative}.chat-message-container:hover .chat-message__debug-actions{opacity:1}.chat-message__debug-actions{opacity:0;gap:4px;transition:opacity .2s;display:flex;position:absolute;top:-8px;right:-8px}.chat-message__context-view{color:#333;background-color:#f2f2f2;border-radius:8px;margin-top:8px;padding:8px;font-size:14px}.chat-message__context-header{justify-content:space-between;align-items:center;margin-bottom:8px;display:flex}.chat-message__context-title{color:#767676;margin:0;font-size:14px}.chat-message__debug-button{cursor:pointer;background:0 0;border:none;border-radius:4px;justify-content:center;align-items:center;padding:4px;display:flex}.chat-message__debug-button:hover{background-color:#e0e0e0}.chat-message__context-data{font-family:var(--font-first);white-space:pre-wrap;background-color:#fff;border-radius:4px;max-height:200px;margin:0;padding:8px;font-size:14px;overflow-y:auto}@keyframes fadeIn{0%{opacity:0;transform:translate(-50%,10px)}to{opacity:1;transform:translate(-50%)}}.conversation-history{--conversation-history-row-padding:var(--ui-space-xs)var(--ui-space-md);--conversation-history-title-font-size:var(--ui-font-size-16);--conversation-history-title-line-height:var(--ui-line-height-24);--conversation-history-date-font-size:var(--ui-font-size-14);--conversation-history-date-line-height:var(--ui-line-height-20);overflow:hidden}.conversation-history .chat-dropdown__content{padding:0}.conversation-history__list{margin:0;padding:0;list-style:none}.conversation-history__item{position:relative}.conversation-history__item:not(:last-child):after{content:"";height:var(--ui-stroke-1);background-color:var(--ui-color-neutral-grey-200);position:absolute;bottom:0;left:0;right:0}.conversation-history__item-wrapper{align-items:center;gap:var(--ui-space-xs);padding:var(--conversation-history-row-padding);transition:background-color .2s;display:flex}.conversation-history__item-wrapper:hover{background-color:var(--ui-color-neutral-grey-100)}.conversation-history__button{cursor:pointer;text-align:left;background:0 0;border:none;flex:1;align-items:center;min-width:0;padding:0;display:flex}.conversation-history__info{flex:1;min-width:0}.conversation-history__item-title{font-size:var(--conversation-history-title-font-size);font-weight:var(--ui-font-weight-medium);line-height:var(--conversation-history-title-line-height);color:var(--ui-color-neutral-grey-900);margin-bottom:var(--ui-space-xxxs);white-space:nowrap;text-overflow:ellipsis;font-family:var(--ui-font-family-body);letter-spacing:normal;overflow:hidden}.conversation-history__metadata{font-size:var(--conversation-history-date-font-size);font-weight:var(--ui-font-weight-medium);line-height:var(--conversation-history-date-line-height);color:var(--ui-color-neutral-grey-700);font-family:var(--ui-font-family-body);letter-spacing:normal}.conversation-history__empty{text-align:center;color:#767676;padding:40px 16px;font-size:14px}.conversation-history__loading{text-align:center;color:#767676;flex-direction:column;align-items:center;gap:12px;padding:40px 16px;font-size:14px;display:flex}.conversation-history__spinner{border:2px solid #f2f2f2;border-top-color:var(--ui-color-brand-fod-primary-a);border-radius:50%;width:24px;height:24px;animation:.8s linear infinite spin}.conversation-history__error{text-align:center;color:#f66868;flex-direction:column;align-items:center;gap:8px;padding:40px 16px;font-size:14px;display:flex}.conversation-history__error .icon__wrapper{width:24px;height:24px}.conversation-history__delete-button{cursor:pointer;opacity:1;background:0 0;border:none;border-radius:8px;flex-shrink:0;justify-content:center;align-items:center;width:24px;height:24px;padding:2px;transition:background-color .2s;display:flex}.conversation-history__delete-button:hover{color:#f66868;background-color:rgba(246,104,104,.1)}.conversation-history__delete-button .icon__wrapper{width:20px;height:20px}.conversation-history__new-chat-button{width:100%}.conversation-history__end{text-align:center;color:#767676;font-size:14px;font-family:var(--font-second);padding:16px;font-weight:500}@keyframes spin{0%{transform:rotate(0)}to{transform:rotate(360deg)}}.chat-badge{border-radius:16px;align-items:center;gap:4px;padding:4px 8px;font-size:14px;display:inline-flex}.chat-badge__emoji{font-size:inherit}.chat-badge__text{font-family:var(--font-second);color:transparent;-webkit-background-clip:text;background-clip:text;font-weight:600;line-height:26px}.chat-badge--practice{background-color:#d6f6ff}.chat-badge--practice .chat-badge__text{color:#0a3366}.chat-badge--study{background-color:#ffe8ff}.chat-badge--study .chat-badge__text{color:#6b0a6b}.chat-badge--revision{background-color:#fff3e0}.chat-badge--revision .chat-badge__text{color:#e65100}.practice-mascot-dialog{--practice-mascot-dialog-mascot-width:5rem;--practice-mascot-dialog-mascot-height:5.875rem;--practice-mascot-dialog-mascot-image:none}.practice-mascot-dialog--look-up{--practice-mascot-dialog-mascot-image:var(--tangerine-ai-bot-look-up)}.practice-mascot-dialog--disconnected{--practice-mascot-dialog-mascot-image:var(--tangerine-ai-bot-disconnected)}.practice-mascot-dialog .MuiDialogContent-root{border-top:1px solid var(--ui-color-neutral-grey-200);border-bottom:1px solid var(--ui-color-neutral-grey-200)}.practice-mascot-dialog__content{align-items:center;gap:var(--ui-space-xs);display:flex}.practice-mascot-dialog__mascot{width:var(--practice-mascot-dialog-mascot-width);height:var(--practice-mascot-dialog-mascot-height);background-image:var(--practice-mascot-dialog-mascot-image);background-position:50%;background-repeat:no-repeat;background-size:contain;flex-shrink:0}.practice-mascot-dialog__body{font-family:var(--ui-font-family-body);font-size:var(--ui-font-size-16);font-weight:var(--ui-font-weight-medium);line-height:var(--ui-line-height-24);color:var(--ui-color-neutral-grey-900);flex:1;min-width:0;margin:0}.feedback-status-modal{--feedback-status-modal-mascot-width:3rem;--feedback-status-modal-mascot-height:3.5rem}.feedback-status-modal__content{align-items:center;gap:var(--ui-space-sm);padding:var(--ui-space-md);text-align:center;flex-direction:column;display:flex}.feedback-status-modal__mascot{width:var(--feedback-status-modal-mascot-width);height:var(--feedback-status-modal-mascot-height);background-position:50%;background-repeat:no-repeat;background-size:contain}.feedback-status-modal__mascot--success{background-image:var(--tangerine-ai-bot-happy)}.feedback-status-modal__mascot--error{background-image:var(--tangerine-ai-bot-disconnected)}.feedback-status-modal__title{font-family:var(--ui-font-family-heading);font-size:var(--ui-font-size-22);font-weight:var(--ui-font-weight-semibold);line-height:var(--ui-line-height-32);color:var(--ui-color-neutral-grey-900);margin:0}.feedback-status-modal__description{font-family:var(--ui-font-family-body);font-size:var(--ui-font-size-16);font-weight:var(--ui-font-weight-regular);line-height:var(--ui-line-height-24);color:var(--ui-color-neutral-grey-900);margin:0}.tutor-usage-chart{border-top:1px solid #e0e0e0;flex-direction:column;gap:16px;padding-top:24px;display:flex}.tutor-usage-chart__header{justify-content:space-between;align-items:flex-start;display:flex}.tutor-usage-chart__header-text{flex-direction:column;gap:4px;display:flex}.tutor-usage-chart__title{font-family:var(--font-first);color:#333;margin:0;font-size:18px;font-weight:700;line-height:24px}.tutor-usage-chart__description{font-family:var(--font-second);color:#767676;margin:0;font-size:14px;font-weight:400;line-height:20px}.tutor-usage-chart__filter{flex-shrink:0;min-width:180px}.tutor-usage-chart__container{margin-top:16px}.tutor-usage-chart__legend{align-items:center;gap:16px;margin:0;padding:0;list-style:none;display:flex}.tutor-usage-chart__legend-item{font-family:var(--font-second);color:#4e4e4e;align-items:center;gap:4px;font-size:14px;font-weight:500;line-height:20px;display:flex}.tutor-usage-chart__legend-color{flex-shrink:0;width:28px;height:12px}.severity-indicator{align-items:flex-end;gap:2px;height:12px;display:flex}.severity-indicator__bar{border-radius:var(--border-radius-01);width:4px}.severity-indicator--high .severity-indicator__bar{background-color:#f76868}.severity-indicator--medium .severity-indicator__bar{background-color:#ffe08c}.severity-indicator--low .severity-indicator__bar{background-color:#97e0c3}.severity-indicator__bar:first-child{height:4px}.severity-indicator__bar:nth-child(2){height:8px}.severity-indicator__bar:nth-child(3){height:12px}.severity-indicator--high .severity-indicator__bar--active{background-color:#f76868}.severity-indicator--medium .severity-indicator__bar--active{background-color:#d18436}.severity-indicator--low .severity-indicator__bar--active{background-color:#135f3e}.prerequisite-list{flex-direction:column;gap:8px;display:flex}.prerequisite-list__description{font-family:var(--font-second);color:#4e4e4e;background-color:#f9f9f9;border-radius:8px;margin:0;padding:8px;font-size:14px;line-height:20px}.prerequisite-list__description strong{font-family:var(--font-second-bold)}.prerequisite-list__items{flex-direction:column;gap:8px;margin:0;padding:0;list-style:none;display:flex}.prerequisite-list__item{flex-direction:column;gap:4px;display:flex}.prerequisite-list__item:not(:last-child){border-bottom:1px solid #e0e0e0;padding-bottom:8px}.learning-block-content{flex-direction:column;gap:16px;padding:16px;display:flex}.learning-block-content__header{flex-direction:column;display:flex}.learning-block-content__label-row{justify-content:space-between;align-items:flex-start;margin-bottom:8px;display:flex}.learning-block-content__label-group{align-items:center;gap:4px;display:flex}.learning-block-content__kc-info{flex-direction:column;gap:2px;display:flex}.learning-block-content__kc-statement{font-family:var(--font-second);color:#333;margin:0;font-size:18px;font-weight:500;line-height:26px}.learning-block-content__locations{flex-direction:column;gap:2px;margin:0;padding-left:16px;list-style:disc;display:flex}.learning-block-content__location{font-family:var(--font-second);color:#767676;margin:0;font-size:14px;line-height:20px}.learning-block-content__stats{flex-direction:column;gap:8px;display:flex}.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}