.chat-input{background-color:#fff;flex-wrap:wrap;flex-shrink:0;align-items:flex-end;gap:8px;width:100%;padding:0;display:flex}.chat-input__field-wrapper{background-color:#fff;border:1px solid #e0e0e0;border-radius:24px;flex-direction:column;flex:1;gap:8px;min-height:40px;padding:3px 12px;display:flex;position:relative}.chat-input__field-wrapper:focus-within{border:1px solid var(--color-tangerine-ai,#bc3ebc)}.chat-input__text-row{align-items:flex-end;gap:8px;width:100%;display:flex}.chat-input__recording{transform-origin:100%;width:100%;animation:.22s forwards chat-input-grow-from-right;transform:scaleX(0)}.chat-input__error{color:#e04949;flex-basis:100%;width:100%;margin-bottom:6px;padding-left:4px;font-size:12px;line-height:1.3}.chat-input__field{font-size:16px;font-family:var(--font-second);color:#333;resize:none;background-color:transparent;border:none;outline:none;align-self:center;width:100%;min-height:24px;max-height:72px;margin:0;padding:0;line-height:1.5;overflow-y:auto}.chat-input__field::-webkit-scrollbar{display:none}.chat-input__field{scrollbar-width:none}.chat-input__field--rich{cursor:text;word-wrap:break-word;white-space:pre-wrap}.chat-input__field--rich:empty:not(:focus):before{content:attr(data-placeholder);color:#767676;pointer-events:none;position:absolute}.chat-input__field--rich:not(:focus):has(>br:only-child):before{content:attr(data-placeholder);color:#767676;pointer-events:none;position:absolute}.chat-input__field--rich br{content:"";display:block}.chat-input__formula{cursor:default;-webkit-user-select:none;user-select:none;margin:0 2px;display:inline-block}.chat-input__formula .katex{font-size:16px;line-height:16px;font-family:var(--font-second);display:inline-block}.chat-input__formula .katex-display{text-align:left;margin:0;display:inline-block}.chat-input__formula .katex .katex-html{color:#333}.chat-input__image-preview{background:#f2f2f2;border-radius:12px;align-items:center;width:-webkit-fit-content;width:fit-content;padding:4px;display:flex;position:relative}.chat-input__image-preview img{object-fit:cover;border-radius:8px;width:48px;height:48px}.chat-input__image-remove{cursor:pointer;background:#e0e0e0;border:none;border-radius:50%;justify-content:center;align-items:center;width:16px;height:16px;padding:0;transition:background-color .2s;display:flex;position:absolute;top:-4px;right:-4px}.chat-input__image-remove:hover{background:#101010}.chat-input__image-remove svg{width:10px;height:10px}.chat-input__image-remove svg path{fill:#fff!important}.chat-input__image-button{width:24px;top:-10px}.chat-input__image-button svg{width:20px;height:20px}.chat-input__calculator-button{width:24px}.chat-input__calculator-button svg{width:20px;height:20px}.chat-input__action-button{background:var(--color-tangerine-ai-gradient,linear-gradient(111deg,#e14de3 12.58%,#8c2a89 100%));cursor:pointer;border:none;border-radius:8px;justify-content:center;align-items:center;min-width:40px;height:40px;padding:8px 12px;transition:transform .2s;display:flex;position:relative;overflow:hidden}.chat-input__action-button:before{content:"";background:var(--color-tangerine-ai-gradient-reverse,linear-gradient(291deg,#e14de3 12.5%,#8c2a89 99.91%));border-radius:inherit;opacity:0;z-index:0;transition:opacity .4s;position:absolute;top:0;bottom:0;left:0;right:0}.chat-input__action-button:after{content:"";background:var(--color-tangerine-ai-dark,#741571);border-radius:inherit;opacity:0;z-index:0;transition:opacity .2s;position:absolute;top:0;bottom:0;left:0;right:0}.chat-input__action-button:hover:before,.chat-input__action-button:active:after{opacity:1}.chat-input__action-button svg{z-index:1;width:24px;height:24px;position:relative}.chat-input__action-button svg path{fill:#fff!important}.chat-input__action-button:disabled{cursor:not-allowed;background:0 0;transform:none}.chat-input__action-button:disabled:before{content:"";background:var(--color-tangerine-ai-gradient,linear-gradient(111deg,#e14de3 12.58%,#8c2a89 100%));opacity:.4;border-radius:inherit;z-index:0;position:absolute;top:0;bottom:0;left:0;right:0}.chat-input__action-button:disabled:hover{transform:none}.chat-input__action-button:disabled:hover:before{opacity:.4}.chat-input__action-button:disabled:active:after{opacity:0}.chat-input__action-button--recording{background:#e04949;animation:1.5s ease-in-out infinite pulse}.chat-input__action-button--recording:before,.chat-input__action-button--recording:after{display:none}.chat-input__action-button--recording:hover{background:#d22424}.chat-input__action-button--recording:active{background:#bc2020}.chat-input__action-button--recording svg path{fill:#fff!important}.chat-input__field::placeholder{color:#767676}.chat-input--disabled .chat-input__field-wrapper{cursor:not-allowed;background-color:#f9f9f9;border-color:#f2f2f2}.chat-input--disabled .chat-input__field{color:#767676;cursor:not-allowed}.chat-input--disabled .chat-input__field::placeholder{color:#767676}@keyframes pulse{0%,to{opacity:1;transform:scale(1)}50%{opacity:.8;transform:scale(1.05)}}@keyframes chat-input-grow-from-right{0%{opacity:0;transform:scaleX(0)}to{opacity:1;transform:scaleX(1)}}.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{position:absolute;top:8px;right:8px}.diagram-mermaid__download-btn svg path{fill:var(--color-tangerine-ai,#bc3ebc)}.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}.tutor-ai-tabs{align-items:center;gap:8px;display:flex}.tutor-ai-tabs__tab{font-size:14px;font-family:var(--font-second);color:#333;cursor:pointer;border-radius:var(--border-radius-01);padding:8px;line-height:20px;transition:color .2s;position:relative}.tutor-ai-tabs__tab--active{font-family:var(--font-second-bold);color:#333;cursor:default;background-color:#f9f9f9;font-size:14px;line-height:20px}.teacher-layout-wrapper{height:100vh;display:flex;overflow:hidden}.teacher-layout-wrapper__sidebar{background:#faf7f5;flex-direction:column;flex-shrink:0;width:265px;height:100vh;transition:width .3s;display:flex;overflow-x:hidden;overflow-y:auto}.teacher-layout-wrapper__sidebar-header{justify-content:space-between;align-items:center;padding:24px 24px 0;display:flex}.teacher-layout-wrapper__collapse-btn{cursor:pointer;background:0 0;border:none;border-radius:4px;justify-content:center;align-items:center;padding:24px;transition:background-color .2s;display:flex}.teacher-layout-wrapper__collapse-btn:hover{background-color:rgba(0,0,0,.05)}.teacher-layout-wrapper__collapse-btn .icon{color:#767676}.teacher-layout-wrapper__title-container{visibility:visible;transition:opacity .3s;overflow:hidden}.teacher-layout-wrapper__title{color:#4e4e4e;white-space:nowrap;font-size:24px;font-weight:600;font-family:var(--font-first);margin:0;padding:24px 24px 0}.teacher-layout-wrapper__navigation{flex:1;padding:24px 0 0 24px;transition:padding .3s}.teacher-layout-wrapper__nav-list{font-family:var(--font-first);flex-direction:column;gap:8px;margin:0;padding:0;list-style:none;display:flex}.teacher-layout-wrapper__nav-item{cursor:pointer;text-align:left;background:0 0;border:none;border-radius:8px 0 0 8px;align-items:center;width:100%;padding:8px 15px;transition:background-color .2s;display:flex;overflow:hidden}.teacher-layout-wrapper__nav-item .icon{flex-shrink:0}.teacher-layout-wrapper__nav-item .icon__wrapper svg path{fill:#767676;transition:fill .2s}.teacher-layout-wrapper__nav-item:hover{background:rgba(255,255,255,.5)}.teacher-layout-wrapper__nav-item:hover .icon__wrapper svg path{fill:var(--color-tangerine-ai-dark,#741571)}.teacher-layout-wrapper__nav-item:hover .teacher-layout-wrapper__nav-text{color:var(--color-tangerine-ai-dark,#741571)}.teacher-layout-wrapper__nav-item--active{background:#fff}.teacher-layout-wrapper__nav-item--active .teacher-layout-wrapper__nav-text{color:var(--color-tangerine-ai,#bc3ebc);font-family:var(--font-first)}.teacher-layout-wrapper__nav-item--active .icon__wrapper svg path{fill:var(--color-tangerine-ai,#bc3ebc)}.teacher-layout-wrapper__nav-item--active:hover{background:#fff}.teacher-layout-wrapper__nav-text{color:#767676;white-space:nowrap;opacity:1;width:auto;margin-left:12px;font-family:Dosis Bold,sans-serif;font-size:16px;font-weight:600;line-height:24px;transition:opacity .2s,width .3s}.teacher-layout-wrapper__dev-toggle{margin-top:auto;padding:16px 20px}.teacher-layout-wrapper__dev-toggle-hint{color:#767676;margin-top:4px;font-size:11px;line-height:1.3}.teacher-layout-wrapper__main{background:#fff;flex:1;min-width:0;padding-top:36px;overflow:auto}.teacher-layout-wrapper__main--default-padding{padding-left:72px;padding-right:72px}.teacher-layout-wrapper__main--left-only-padding{padding-left:72px;padding-right:0}.teacher-layout-wrapper__main--none-padding{padding-left:0;padding-right:0}.teacher-layout-wrapper--collapsed .teacher-layout-wrapper__sidebar{width:80px}.teacher-layout-wrapper--collapsed .teacher-layout-wrapper__sidebar-header{justify-content:center;padding-left:0;padding-right:0}.teacher-layout-wrapper--collapsed .teacher-layout-wrapper__sidebar-header .back-arrow{display:none}.teacher-layout-wrapper--collapsed .teacher-layout-wrapper__title-container{opacity:0;visibility:hidden;transition:opacity .3s,visibility 0s linear .3s}.teacher-layout-wrapper--collapsed .teacher-layout-wrapper__navigation{align-items:center;padding:24px 0 0 24px}.teacher-layout-wrapper--collapsed .teacher-layout-wrapper__nav-item{justify-content:center;padding:8px}.teacher-layout-wrapper--collapsed .teacher-layout-wrapper__nav-text{opacity:0;width:0;margin-left:0;transition:opacity .2s ease-out,width .3s,margin-left .3s}.teacher-layout-wrapper--show-back-collapsed .teacher-layout-wrapper__sidebar-header .back-arrow{display:flex}.teacher-layout-wrapper__mobile-menu-button,.teacher-layout-wrapper__mobile-menu-backdrop{display:none}.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}.topic-ranking-detail{border-radius:var(--border-radius-01);background-color:#fff;border:1px solid #e0e0e0;border-top:none;border-top-left-radius:0;border-top-right-radius:0;margin-top:4px;padding:8px 24px 16px}.topic-ranking-detail__summary{align-items:center;gap:24px;padding-bottom:8px;display:flex}.topic-ranking-detail__summary-item{font-family:var(--font-second);color:#333;align-items:center;gap:8px;font-size:14px;font-weight:500;line-height:18px;display:flex}.topic-ranking-detail__summary-item svg{flex-shrink:0}.topic-ranking-detail__summary-item .icon--color-default.icon--lib-skin path{fill:#333}.topic-ranking-detail__table{flex-direction:column;margin-top:8px;display:flex}.topic-ranking-detail__table-header{align-items:center;gap:16px;padding-bottom:2px;display:flex}.topic-ranking-detail__table-header-label{font-family:var(--font-second);color:#4e4e4e;text-transform:uppercase;letter-spacing:.5px;font-size:12px;font-weight:600;line-height:16px}.topic-ranking-detail__table-header-label--student{flex:1;min-width:0}.topic-ranking-detail__table-header-label--queries{flex-shrink:0;min-width:150px}.topic-ranking-detail__table-body{flex-direction:column;display:flex}.topic-ranking-detail__user-row{border-radius:var(--border-radius-01);justify-content:space-between;align-items:center;gap:16px;min-height:36px;padding:4px 8px;display:flex}.topic-ranking-detail__user-row:nth-child(2n){background-color:#f9f9f9}.topic-ranking-detail__user-info{flex:1;align-items:center;gap:8px;min-width:0;display:flex}.topic-ranking-detail__user-name{font-family:var(--font-second);color:#333;white-space:nowrap;font-size:14px;font-weight:500;line-height:20px}.topic-ranking-detail__extended-badge{font-family:var(--font-second);white-space:nowrap;color:#4e4e4e;background-color:#fffaea;border-radius:16px;align-items:center;gap:4px;padding:2px 8px;font-size:14px;font-weight:500;line-height:18px;display:inline-flex}.topic-ranking-detail__extended-badge .icon--color-default.icon--lib-skin path{fill:#d18436}.topic-ranking-detail__user-queries{flex-shrink:0;justify-content:flex-end;align-items:center;gap:8px;min-width:200px;padding-right:8px;display:flex}.topic-ranking-detail__user-bar{background-color:#f2f2f2;border-radius:3px;width:120px;height:8px;overflow:hidden}.topic-ranking-detail__user-bar-fill{border-radius:3px;height:100%;transition:width .3s}.topic-ranking-detail__user-frequency{font-family:var(--font-first);text-align:right;min-width:32px;font-size:14px;font-weight:700;line-height:20px}.topic-ranking-detail__loading{border-left:2px solid #e0e0e0;justify-content:center;align-items:center;margin-top:4px;padding:16px;display:flex}.topic-ranking-detail__error,.topic-ranking-detail__empty{margin-top:4px;padding:8px 16px 8px 24px}.topic-ranking-detail__error p,.topic-ranking-detail__empty p{font-family:var(--font-second);color:#767676;text-align:center;margin:0;font-size:14px}.topic-ranking-detail--color-1 .topic-ranking-detail__user-bar-fill{background-color:#8e0d8e}.topic-ranking-detail--color-1 .topic-ranking-detail__user-frequency{color:#8e0d8e}.topic-ranking-detail--color-2 .topic-ranking-detail__user-bar-fill{background-color:#97033a}.topic-ranking-detail--color-2 .topic-ranking-detail__user-frequency{color:#97033a}.topic-ranking-detail--color-3 .topic-ranking-detail__user-bar-fill{background-color:#992e19}.topic-ranking-detail--color-3 .topic-ranking-detail__user-frequency{color:#992e19}.topic-ranking-detail--color-4 .topic-ranking-detail__user-bar-fill{background-color:#996008}.topic-ranking-detail--color-4 .topic-ranking-detail__user-frequency{color:#996008}.topic-ranking-detail--color-5 .topic-ranking-detail__user-bar-fill{background-color:#487201}.topic-ranking-detail--color-5 .topic-ranking-detail__user-frequency{color:#487201}.topic-ranking-detail--color-6 .topic-ranking-detail__user-bar-fill{background-color:#0a6910}.topic-ranking-detail--color-6 .topic-ranking-detail__user-frequency{color:#0a6910}.topic-ranking-detail--color-7 .topic-ranking-detail__user-bar-fill{background-color:#02788a}.topic-ranking-detail--color-7 .topic-ranking-detail__user-frequency{color:#02788a}.topic-ranking-detail--color-8 .topic-ranking-detail__user-bar-fill{background-color:#0f4f99}.topic-ranking-detail--color-8 .topic-ranking-detail__user-frequency{color:#0f4f99}.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{gap:16px;margin:0;padding:0;list-style:none;display:flex}.tutor-usage-section__stat-card{background-color:#fff;border:1px solid #e0e0e0;border-radius:8px;flex-direction:column;flex:1;gap:8px;padding:8px 16px;display:flex}.tutor-usage-section__stat-header{justify-content:space-between;align-items:center;display:flex}.tutor-usage-section__stat-icon{border-radius:8px;justify-content:center;align-items:center;width:40px;height:40px;display:flex}.tutor-usage-section__stat-icon--purple{background-color:#fff1ff}.tutor-usage-section__stat-icon--purple .icon--color-default.icon--lib-core path{fill:#8e0d8e}.tutor-usage-section__stat-icon--blue{background-color:#d6f6ff}.tutor-usage-section__stat-icon--blue .icon--color-default.icon--lib-skin path{fill:#0f4f99}.tutor-usage-section__stat-icon--orange{background-color:#ffebe2}.tutor-usage-section__stat-icon--orange .icon--color-default.icon--lib-skin path{fill:#992e19}.tutor-usage-section__stat-icon--green{background-color:#d7fedb}.tutor-usage-section__stat-icon--green .icon--color-default.icon--lib-skin path{fill:#0a6910}.tutor-usage-section__stat-info-icon{cursor:help;opacity:.5;align-items:center;display:flex}.tutor-usage-section__stat-info-icon:hover{opacity:.8}.tutor-usage-section__stat-label{font-family:var(--font-second);color:#4e4e4e;margin:8px 0 0;font-size:14px;font-weight:500;line-height:20px}.tutor-usage-section__stat-value{font-family:var(--font-second);color:#333;margin:0;font-size:18px;font-weight:700;line-height:26px}.tutor-usage-section__stat-subtitle{font-family:var(--font-second);color:#767676;margin:0;font-size:14px;font-weight:500;line-height:20px}.tutor-usage-section__stat-trend{font-family:var(--font-second);align-items:center;gap:2px;margin:8px 0 0;font-size:12px;font-weight:600;line-height:18px;display:flex}.tutor-usage-section__stat-trend .icon__wrapper{margin-right:8px}.tutor-usage-section__stat-trend .icon__wrapper svg{width:16px;height:16px}.tutor-usage-section__stat-trend--positive{color:#135f3e}.tutor-usage-section__stat-trend--positive .icon--color-success.icon--lib-core{fill:#135f3e}.tutor-usage-section__stat-trend--positive .tutor-usage-section__stat-trend-text{color:#135f3e}.tutor-usage-section__stat-trend--negative{color:#ba1f33}.tutor-usage-section__stat-trend--negative .icon--color-red.icon--lib-core{fill:#ba1f33}.tutor-usage-section__stat-trend--negative .tutor-usage-section__stat-trend-text{color:#ba1f33}.tutor-usage-section__stat-trend-text{font-family:var(--font-second);color:#767676;margin-left:2px;font-size:12px;font-weight:400}.tutor-usage-section__chart{border-top:1px solid #e0e0e0;flex-direction:column;gap:16px;padding-top:24px;display:flex}.tutor-usage-section__chart-header{justify-content:space-between;align-items:flex-start;display:flex}.tutor-usage-section__chart-header-text{flex-direction:column;gap:4px;display:flex}.tutor-usage-section__chart-title{font-family:var(--font-first);color:#333;margin:0;font-size:18px;font-weight:700;line-height:24px}.tutor-usage-section__chart-description{font-family:var(--font-second);color:#767676;margin:0;font-size:14px;font-weight:400;line-height:20px}.tutor-usage-section__chart-filter{flex-shrink:0;min-width:180px}.tutor-usage-section__chart-container{margin-top:16px}.tutor-usage-section__chart-legend{align-items:center;gap:16px;margin:0;padding:0;list-style:none;display:flex}.tutor-usage-section__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-section__chart-legend-color{flex-shrink:0;width:28px;height:12px}.tutor-usage-section__empty{font-family:var(--font-second);color:#767676;text-align:center;margin:0;padding:24px 0;font-size:14px}.empty-state{text-align:center;flex-direction:column;justify-content:center;align-items:center;padding:8px 24px;display:flex}.empty-state__icon{border-radius:16px;justify-content:center;align-items:center;width:36px;height:28px;margin-bottom:16px;display:flex}.empty-state__icon--success{background-color:#d7fedb}.empty-state__icon--success .icon--color-default.icon--lib-skin path{fill:#0a6910}.empty-state__icon--warning{background-color:#fffaea}.empty-state__icon--warning .icon--color-default.icon--lib-skin path{fill:#d18436}.empty-state__icon--muted{background-color:#f2f2f2}.empty-state__icon--muted .icon--color-default.icon--lib-skin path{fill:#4e4e4e}.empty-state__icon--info{background-color:#d6f6ff}.empty-state__icon--info .icon--color-default.icon--lib-skin path,.empty-state__icon--info .icon--color-default.icon--lib-core path{fill:#0f4f99}.empty-state__icon--error{background-color:#ffebe2}.empty-state__icon--error .icon--color-default.icon--lib-skin path,.empty-state__icon--error .icon--color-default.icon--lib-core path{fill:#992e19}.empty-state__title{font-family:var(--font-first);color:#333;margin:0 0 8px;font-size:16px;font-weight:600;line-height:24px}.empty-state__description{font-family:var(--font-second);color:#333;margin:0;font-size:16px}