.chat-header-container{background-color:#fff;border-bottom:1px solid #f2f2f2}.chat-header{background-color:#fff;justify-content:space-between;align-items:center;padding:14px 16px;display:flex;position:relative}.chat-header__left,.chat-header__right{flex:none;align-items:center;gap:8px;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__button{cursor:pointer;background:0 0;border:none;border-radius:4px;justify-content:center;align-items:center;padding:8px;transition:background-color .2s;display:flex}.chat-header__button:hover{cursor:pointer}.chat-header__badge{background-color:var(--ui-color-brand-fod-primary-a);color:#fff;border-radius:10px;justify-content:center;align-items:center;min-width:20px;height:20px;margin-left:8px;padding:0 6px;font-size:12px;font-weight:700;display:flex}.chat-header__divider{background-color:#f2f2f2;width:1px;height:30px;margin:0 8px}.chat-audio-recorder{background:var(--ui-color-brand-fod-primary-a);border-radius:24px;width:100%;min-height:40px;position:relative;overflow:hidden}.chat-audio-recorder__content{z-index:1;color:#fff;justify-content:space-between;align-items:center;gap:12px;padding:4px 12px;display:flex;position:relative}.chat-audio-recorder__waves{flex:1;align-items:center;gap:3px;height:30px;margin-right:8px;display:inline-flex}.chat-audio-recorder__waves span{background:rgba(255,255,255,.95);border-radius:2px;width:4px;height:4px}.chat-audio-recorder__actions{flex-shrink:0;align-items:center;gap:8px;display:inline-flex}.chat-audio-recorder__icon-btn{cursor:pointer;background:#f9f9f9;border:1px solid #f2f2f2;border-radius:50%;place-items:center;width:24px;height:24px;padding:0;transition:all .2s ease-in-out;display:grid}.chat-audio-recorder__icon-btn--white{background:#fff;border:1px solid #f2f2f2;box-shadow:0 1px 2px rgba(0,0,0,.08)}.chat-audio-recorder__icon-btn svg{width:16px;height:16px}.chat-audio-recorder__icon-btn:not(:disabled):hover{background:#f2f2f2;border:1px solid #e0e0e0}.chat-audio-recorder__icon-btn:not(:disabled):active{background:#f9f9f9;transform:translateY(0);box-shadow:inset 0 3px rgba(224,224,224,.7)}.chat-audio-recorder__icon-btn:disabled{cursor:not-allowed;background:#f2f2f2;transform:none;box-shadow:0 1px 2px rgba(0,0,0,.05)}.chat-content-references{background-color:#f9f9f9;border-top:1px solid #e0e0e0;border-radius:0 0 8px;padding:8px}.chat-content-references__title{color:#767676;font-size:14px;font-weight:600;line-height:30px;font-family:var(--font-second)}.chat-content-references__label{color:#767676;margin-right:8px;font-size:16px;font-weight:600}.chat-content-references__button{color:var(--ui-color-brand-fod-primary-a);cursor:pointer;background:0 0;border:none;padding:0;font-size:14px;text-decoration:underline}.chat-content-references__button:hover{color:var(--ui-color-brand-fod-dark)}.chat-content-references__header{justify-content:space-between;align-items:center;gap:8px;width:100%;display:flex}.chat-content-references__list{flex-direction:column;gap:8px;transition:all .2s;display:flex}.chat-content-references__list--hidden{display:none}.chat-content-references__item{color:var(--ui-color-brand-fod-primary-a);flex-direction:column;gap:2px;max-width:212px;font-size:16px;text-decoration:none;transition:background-color .2s;display:flex}.chat-content-references__item:hover{text-decoration:underline}.chat-content-references__item:active{color:var(--ui-color-brand-fod-dark)}.chat-content-references__item span p{margin:0;display:inline}.chat-content-references__item-title{color:var(--ui-color-brand-fod-primary-a);font-weight:600;display:block}.chat-content-references__section{margin-bottom:12px}.chat-content-references__section:last-child{margin-bottom:0}.chat-content-references__section-header{align-items:center;gap:8px;margin-bottom:8px;display:flex}.chat-content-references__section-icon{align-items:center;font-size:16px;display:flex}.chat-content-references__section-title{font-size:12px;font-weight:600;font-family:var(--font-second);color:#4e4e4e}.chat-content-references__section-links{flex-direction:column;gap:8px;display:flex}.chat-content-references__separator{background-color:#e0e0e0;width:100%;height:1px}.chat-content-references__link{font-size:14px;font-family:var(--font-second);word-break:break-word;line-height:1.4;display:block}.chat-content-references__link-text{display:inline}.chat-content-references__link-text p{margin:0;display:inline}.chat-content-references__link-text-course-title{font-weight:600}.chat-content-references__snippet{color:#333;margin-bottom:4px;font-size:14px;font-style:italic;line-height:1.4;display:block}.chat-content-references__domain{color:#333;font-size:12px;display:block}.chat-content-references--expanded{flex-direction:column;gap:8px;display:flex}.chat-content-references--expanded .chat-content-references__header{border-bottom:1px solid #e0e0e0;padding-bottom:0}@media screen and (max-width:768px){.chat-content-references{margin-top:12px;padding:10px 12px}.chat-content-references__item{padding:3px 10px;font-size:11px}}.chat-image-modal-container{border-radius:var(--border-radius-01);background-color:var(--color-background-secondary);justify-content:center;align-items:center;width:100%;min-height:300px;padding:20px;display:flex;position:relative}.chat-image-modal-container .chat-image-modal__image{object-fit:contain;width:auto;max-width:100%;height:auto;max-height:calc(80vh - 200px);display:block}.chat-image-modal-container .chat-image-modal__download-button{background-color:var(--color-background-primary);border:1px solid var(--color-border);border-radius:var(--border-radius-01);cursor:pointer;opacity:.9;z-index:10;justify-content:center;align-items:center;padding:8px;transition:all .2s;display:flex;position:absolute;top:20px;right:20px}.chat-image-modal-container .chat-image-modal__download-button:hover{background-color:var(--color-background-hover);opacity:1;transform:scale(1.05)}.chat-image-modal-container .chat-image-modal__download-button:active{transform:scale(.95)}.chat-image-modal-container .chat-image-modal__download-button svg{color:var(--color-text-primary);width:20px;height:20px}@media (max-width:768px){.chat-image-modal-container{padding:10px}.chat-image-modal-container .chat-image-modal__image{max-height:calc(90vh - 150px)}.chat-image-modal-container .chat-image-modal__download-button{padding:6px;top:10px;right:10px}.chat-image-modal-container .chat-image-modal__download-button svg{width:18px;height:18px}}.diagram-mermaid{width:100%;height:100%;position:relative}.diagram-mermaid svg{max-width:100%;height:auto;margin:0 auto;display:block}.diagram-mermaid__download-btn{color:var(--ui-color-brand-fod-primary-a);position:absolute;top:8px;right:8px}.diagram-mermaid-error__container{flex-direction:row;gap:8px;display:flex}.diagram-mermaid-error__icon{margin-bottom:.5rem;font-size:2rem}.diagram-mermaid-error__message{color:#333;font-size:18px}.diagram-mermaid-error__details{font-size:14px}.diagram-mermaid-error__code{color:#333;max-width:280px;overflow:auto}.chat-dropdown{background-color:#fff;border:1px solid #e0e0e0;border-radius:8px;flex-direction:column;animation:.2s ease-out slideDown;display:flex;box-shadow:0 5px 20px rgba(169,155,144,.2)}.chat-dropdown__header{border-bottom:1px solid #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)}}.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}.challenge-type-tag{align-items:center;gap:var(--ui-space-xs);padding:var(--ui-space-xxxs)var(--ui-space-xs);border-radius:var(--ui-radius-xxl);font-size:var(--ui-font-size-14);font-weight:var(--ui-font-weight-bold);font-family:var(--ui-font-family-body);line-height:var(--ui-line-height-20);text-overflow:ellipsis;white-space:nowrap;display:inline-flex;overflow:hidden}.challenge-type-tag:before{content:"";width:var(--ui-icon-size-md);height:var(--ui-icon-size-md);font-size:var(--ui-font-size-20);flex-shrink:0;line-height:1}.challenge-type-tag.done{background:var(--ui-color-neutral-grey-100);color:var(--ui-color-neutral-grey-600)}.challenge-type-tag.done:before{filter:grayscale()}.challenge-type-tag--new{background:var(--ui-color-green-200);color:var(--ui-color-green-800)}.challenge-type-tag--new:before{content:"🌱"}.challenge-type-tag--review{background:var(--ui-color-blue-200);color:var(--ui-color-blue-800)}.challenge-type-tag--review:before{content:"🧠"}.challenge-type-tag--combo{background:var(--ui-color-yellow-200);color:var(--ui-color-yellow-800)}.challenge-type-tag--combo:before{content:"⚡"}.teacher-ai-analytics-panel__header{justify-content:space-between;align-items:center;padding-bottom:16px;display:flex}.teacher-ai-analytics-panel__header-titles{flex-direction:column;gap:4px;display:flex}.teacher-ai-analytics-panel__title{font-family:var(--font-first);color:#333;margin:0;font-size:26px;font-weight:700;line-height:40px}.teacher-ai-analytics-panel__subtitle{font-family:var(--font-second);color:#4e4e4e;margin:0;font-size:16px;font-weight:600;line-height:24px}.teacher-ai-analytics-panel__header-filters{align-items:center;gap:16px;display:flex}.teacher-ai-analytics-panel__filter{min-width:200px}.teacher-ai-analytics-panel__content{flex-direction:column;gap:24px;display:flex}.teacher-ai-analytics-panel__content-tabs{border-top:1px solid #e0e0e0;border-bottom:1px solid #e0e0e0;padding:16px 4px}.intent-distribution-section{background-color:#fff;flex-direction:column;gap:16px;margin-bottom:24px;padding:16px 24px;display:flex;overflow:hidden}.intent-distribution-section__header{flex-flow:wrap;justify-content:space-between;align-items:flex-start;gap:8px;display:flex}.intent-distribution-section__header-text{flex-direction:column;gap:8px;display:flex}.intent-distribution-section__dev-toggle{border:1px dashed #ababab;border-radius:4px;align-items:center;padding:4px 8px;display:flex}.intent-distribution-section__title{font-family:var(--font-first);color:#333;margin:0;font-size:22px;font-weight:600;line-height:32px}.intent-distribution-section__subtitle{font-family:var(--font-second);color:#4e4e4e;margin:0;font-size:16px;font-weight:400;line-height:24px}.intent-distribution-section__loading{justify-content:center;align-items:center;min-height:200px;display:flex}.intent-distribution-section__empty{font-family:var(--font-second);color:#767676;text-align:center;margin:0;padding:24px 0;font-size:14px}.intent-distribution-section__chart-wrapper{background-color:#f9f9f9;border-radius:8px;min-height:600px;padding:8px;position:relative}.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 0;display:flex}.severity-badge{flex-direction:column;flex-shrink:0;align-items:flex-start;gap:2px;display:flex}.severity-badge__label{font-family:var(--font-second);color:#767676;font-size:14px;font-weight:500;line-height:18px}.severity-badge__row{align-items:center;gap:4px;display:flex}.severity-badge__level{font-family:var(--font-second);color:#333;font-size:14px;font-weight:500;line-height:16px}.severity-badge--horizontal{flex-direction:row;align-items:center;gap:4px}.education-year-selector .select-customizable__label{margin-bottom:8px}.evaluation-criteria-selector{flex-direction:column;gap:24px;display:flex}.evaluation-criteria-selector .select-learning-objectives__chevron{justify-content:flex-end}.evaluation-criteria-selector--loading{justify-content:center;align-items:center;min-height:100px;display:flex}.evaluation-criteria-selector__field{flex-direction:column;display:flex}.evaluation-criteria-selector__label{margin-bottom:8px}.subject-selection-dialog{--subject-selection-dialog-min-height:18.75rem;--subject-selection-dialog-icon-size:3.5rem}.subject-selection-dialog .dialog__content{min-height:var(--subject-selection-dialog-min-height)}.subject-selection-dialog__content{padding:20px 0}.subject-selection-dialog__error{margin:0 0 var(--ui-space-md);padding:var(--ui-space-sm)var(--ui-space-md);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-notification-error-stroke);background-color:var(--ui-color-notification-error-bg);border:var(--ui-stroke-1)solid var(--ui-color-notification-error-stroke);border-radius:var(--ui-radius-xl)}.subject-selection-dialog__list{gap:var(--ui-space-sm);grid-template-columns:1fr;margin:0;padding:0;list-style:none;display:grid}@media only screen and (min-width:480px){.subject-selection-dialog__list{grid-template-columns:repeat(2,1fr)}}.subject-selection-dialog__item:nth-child(8n+1){--subject-card-icon-bg:var(--ui-color-purple-500);--subject-card-icon-fg:var(--ui-color-neutral-white)}.subject-selection-dialog__item:nth-child(8n+2){--subject-card-icon-bg:var(--ui-color-pink-500);--subject-card-icon-fg:var(--ui-color-neutral-white)}.subject-selection-dialog__item:nth-child(8n+3){--subject-card-icon-bg:var(--ui-color-orange-500);--subject-card-icon-fg:var(--ui-color-orange-900)}.subject-selection-dialog__item:nth-child(8n+4){--subject-card-icon-bg:var(--ui-color-comp-yellow-500);--subject-card-icon-fg:var(--ui-color-comp-yellow-900)}.subject-selection-dialog__item:nth-child(8n+5){--subject-card-icon-bg:var(--ui-color-comp-blue-500);--subject-card-icon-fg:var(--ui-color-comp-blue-900)}.subject-selection-dialog__item:nth-child(8n+6){--subject-card-icon-bg:var(--ui-color-comp-green-500);--subject-card-icon-fg:var(--ui-color-comp-green-900)}.subject-selection-dialog__item:nth-child(8n+7){--subject-card-icon-bg:var(--ui-color-darkgreen-500);--subject-card-icon-fg:var(--ui-color-neutral-white)}.subject-selection-dialog__item:nth-child(8n+8){--subject-card-icon-bg:var(--ui-color-darkblue-500);--subject-card-icon-fg:var(--ui-color-neutral-white)}.subject-selection-dialog__card{justify-content:center;align-items:center;gap:var(--ui-space-sm);padding:var(--ui-space-md);color:var(--ui-color-text-default);text-align:center;background-color:var(--ui-color-bg-container-primary);border:var(--ui-stroke-1)solid var(--ui-color-neutral-grey-400);border-radius:var(--ui-radius-xl);cursor:pointer;flex-direction:column;width:100%;height:100%;transition:border-color .15s,background-color .15s;display:flex}.subject-selection-dialog__card:hover{border-color:var(--ui-color-neutral-grey-600)}.subject-selection-dialog__card:focus-visible{border-color:var(--ui-color-neutral-grey-600)}.subject-selection-dialog__card--selected,.subject-selection-dialog__card--selected:hover{border:var(--ui-stroke-2)solid var(--ui-color-brand-fod-primary-a);background-color:var(--ui-color-brand-fod-lighter)}.subject-selection-dialog__card--selected:focus-visible{border:var(--ui-stroke-2)solid var(--ui-color-brand-fod-primary-a);background-color:var(--ui-color-brand-fod-lighter)}.subject-selection-dialog__card-icon{width:var(--subject-selection-dialog-icon-size);height:var(--subject-selection-dialog-icon-size);color:var(--subject-card-icon-fg);background-color:var(--subject-card-icon-bg);border-radius:var(--ui-radius-xl);justify-content:center;align-items:center;display:inline-flex}.subject-selection-dialog__card-icon--image{background-color:transparent;overflow:hidden}.subject-selection-dialog__card-image{object-fit:cover;width:100%;height:100%}.subject-selection-dialog__card-title{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)}.subject-selection-dialog__loading,.subject-selection-dialog__empty{font-family:var(--ui-font-family-body);font-size:var(--ui-font-size-18);line-height:var(--ui-line-height-24);min-height:var(--subject-selection-dialog-min-height);color:var(--ui-color-text-secondary);text-align:center;justify-content:center;align-items:center;display:flex}