.student-web{--student-primary:#244d43;--student-primary-strong:#0756d9;--student-cyan:#d5e2d3;--student-lime:#e2e7c8;--student-orange:#a76d2e;--student-pink:#ecd8cc;--student-ink:#183a32;--student-muted:#667085;--student-mist:#faf8f1;--student-line:#deded1;--student-surface:#fff;background:var(--student-mist);min-height:100dvh;color:var(--student-ink);font-family:var(--font-cn);isolation:isolate}.student-web button,.student-web input,.student-web textarea{font-family:inherit}.student-web button,.student-web a{-webkit-tap-highlight-color:transparent}.student-web button:disabled{cursor:not-allowed}.student-topbar{z-index:40;border-bottom:1px solid var(--lw-line);background:var(--lw-surface);width:100%;box-shadow:none;-webkit-backdrop-filter:blur(18px);backdrop-filter:blur(18px);position:sticky;top:0}.student-topbar__inner{justify-content:space-between;align-items:center;width:min(1120px,100% - 48px);height:84px;margin:0 auto;display:flex}.student-home-page .student-topbar__inner{height:122px}.student-topbar__left,.student-topbar__actions,.student-topbar__actions>*,.student-history-button,.student-account-button{align-items:center;display:flex}.student-topbar__left{gap:14px}.student-topbar__actions{gap:18px}.student-brand{flex:none;width:196px;display:block}.student-brand--compact{width:170px}.student-topbar__title{color:var(--student-ink);letter-spacing:-.02em;margin:0;font-size:22px;font-weight:780}.student-icon-button,.student-history-button,.student-account-button{border:1px solid var(--student-line);background:var(--lw-surface);color:var(--lw-body);box-shadow:none}.student-icon-button{cursor:pointer;border-radius:50%;flex-shrink:0;justify-content:center;align-items:center;width:44px;min-width:44px;height:44px;min-height:44px;padding:0;text-decoration:none;transition:color .18s cubic-bezier(.16,1,.3,1),background-color .18s cubic-bezier(.16,1,.3,1),border-color .18s cubic-bezier(.16,1,.3,1),opacity .18s cubic-bezier(.16,1,.3,1),transform .18s cubic-bezier(.16,1,.3,1);display:inline-flex}.student-icon-button:hover{background:var(--lw-surface);color:var(--student-primary);border-color:var(--lw-line);box-shadow:none;transform:translate(-2px)}.student-icon-button:active{transform:scale(.92)}.student-icon-button svg{pointer-events:none;width:22px;height:22px;margin:auto;display:block}.student-history-button{font-size:var(--text-size-control);border-radius:999px;gap:10px;padding:0 20px;font-weight:650}.student-history-button svg{width:23px}.student-account-button{border:1px solid var(--lw-line);background:var(--lw-surface);color:var(--lw-ink);font-size:var(--text-size-control);border-radius:999px;align-items:center;gap:8px;padding:4px 14px 4px 4px;font-weight:600;text-decoration:none;transition:color .2s,background-color .2s,border-color .2s,opacity .2s,transform .2s;display:inline-flex}.student-account-button:hover{border-color:var(--lw-line);box-shadow:none}.student-page{min-height:100dvh}.student-page--center{place-items:center;padding:24px;display:grid}.student-state{min-height:120px;color:var(--student-muted);font-size:var(--text-size-body);justify-content:center;align-items:center;gap:10px;display:flex}.student-spinner{border:2px solid var(--lw-line);border-top-color:var(--student-primary);border-radius:50%;flex:none;width:20px;height:20px;animation:.75s linear infinite student-spin;display:inline-block}.student-spinner--button{border-color:var(--lw-line);border-top-color:var(--lw-line);width:18px;height:18px}@keyframes student-spin{to{transform:rotate(360deg)}}.student-error-notice{border:1px solid var(--lw-line);background:var(--lw-surface);width:100%;color:var(--lw-warning);font-size:var(--text-size-body);border-radius:16px;flex-wrap:wrap;justify-content:space-between;align-items:center;gap:16px;padding:13px 16px;line-height:1.55;display:flex}.student-error-notice>p{overflow-wrap:anywhere;flex:1 0 100%;min-width:0;margin:0}.student-error-notice>span{overflow-wrap:anywhere;flex:12rem;min-width:0}.student-error-notice button{background:var(--lw-surface);max-width:100%;min-height:40px;color:var(--lw-warning);white-space:normal;overflow-wrap:anywhere;border:0;border-radius:999px;flex:none;padding:0 15px;font-weight:700}.student-primary-button,.student-primary-link{background:var(--lw-inset);min-height:52px;box-shadow:none;color:var(--lw-inverse);font-size:var(--text-size-control);border:0;border-radius:999px;justify-content:center;align-items:center;gap:9px;padding:0 24px;font-weight:750;display:inline-flex}.student-primary-button:disabled{background:var(--lw-surface);box-shadow:none}.student-secondary-button,.student-secondary-link{border:1px solid var(--lw-line);background:var(--lw-surface);min-height:48px;color:var(--student-primary);border-radius:999px;justify-content:center;align-items:center;gap:8px;padding:0 20px;font-weight:700;display:inline-flex}.student-secondary-button svg{width:20px}.student-empty-state{text-align:center;flex-direction:column;justify-content:center;align-items:center;min-height:290px;padding:38px 24px;display:flex}.student-empty-state__mark{background:var(--lw-inset);width:62px;height:62px;color:var(--student-primary);border-radius:22px;place-items:center;margin-bottom:16px;font-size:28px;display:grid}.student-empty-state h2{margin:0;font-size:22px}.student-empty-state p{max-width:520px;color:var(--student-muted);margin:10px 0 22px;line-height:1.7}.student-auth-page{background:var(--student-mist);grid-template-columns:minmax(0,1.08fr) minmax(410px,.92fr);min-height:100dvh;display:grid;position:relative;overflow:hidden}.student-auth-card{z-index:2;background:var(--lw-surface);width:min(500px,100% - 64px);box-shadow:none;border:0;border-radius:16px;align-self:center;margin:38px auto;padding:45px 48px;position:relative}.student-auth-card__mobile-brand{display:none}.student-auth-card h2{letter-spacing:-.03em;margin:0;font-size:32px}.student-auth-card__intro{color:var(--student-muted);margin:10px 0 26px;line-height:1.7}.student-auth-card form,.student-password-card form{flex-direction:column;gap:18px;display:flex}.student-auth-card .student-error-notice,.student-password-card .student-error-notice{margin-bottom:18px}.student-field{color:var(--lw-ink);font-size:var(--text-size-body);flex-direction:column;gap:9px;font-weight:700;display:flex}.student-field input{border:1px solid var(--lw-line);width:100%;height:54px;color:var(--student-ink);font-size:var(--text-size-input);background:var(--student-surface);border-radius:10px;outline:none;padding:0 17px;font-weight:500;transition:border-color .18s,box-shadow .18s,background .18s}.student-field input:focus{border-color:var(--student-cyan);background:var(--lw-surface);box-shadow:none}.student-password-wrap{align-items:center;width:100%;display:flex;position:relative}.student-password-wrap input{width:100%;padding-right:52px}.student-password-toggle{width:38px;height:38px;color:var(--lw-body);cursor:pointer;background:0 0;border:none;border-radius:12px;justify-content:center;align-items:center;padding:0;transition:color .18s,background-color .18s,transform .12s;display:inline-flex;position:absolute;top:50%;right:10px;transform:translateY(-50%)}.student-password-toggle:hover{color:var(--student-primary);background-color:var(--lw-inset)}.student-password-toggle:active{transform:translateY(-50%)scale(.92)}.student-password-toggle svg{width:20px;height:20px}.student-legal-check{color:var(--student-muted);font-size:var(--text-size-caption);grid-template-columns:20px minmax(0,1fr);align-items:start;gap:10px;line-height:1.65;display:grid}.student-legal-check input{width:19px;height:19px;accent-color:var(--student-primary);margin:2px 0 0}.student-legal-check a{color:var(--student-primary);font-weight:650}.student-auth-card .student-primary-button,.student-password-card .student-primary-button{width:100%}.student-auth-card__help{color:var(--lw-body);font-size:var(--text-size-caption);text-align:center;margin:23px 0 0;line-height:1.6}.student-password-page{background:var(--lw-page);place-items:center;min-height:100dvh;padding:32px;display:grid}.student-password-card{border:1px solid var(--student-line);background:var(--lw-surface);width:min(540px,100%);box-shadow:none;border-radius:16px;padding:42px 48px;position:relative;overflow:hidden}.student-password-card__brand{background:var(--lw-surface);border-radius:28px;width:78px;height:78px;position:absolute;top:20px;right:26px;overflow:hidden}.student-password-card__brand img{width:74px;height:auto;margin:-6px auto 0}.student-password-card h1{letter-spacing:-.03em;max-width:350px;margin:18px 0 10px;font-size:29px;line-height:1.3}.student-password-card>p{max-width:420px;color:var(--student-muted);font-size:var(--text-size-body);margin:0 0 24px;line-height:1.75}.student-text-button{min-height:48px;color:var(--student-muted);background:0 0;border:0;font-weight:650}.student-home-page{background:var(--lw-page);min-height:100dvh;position:relative;overflow:hidden}.student-home-copy{margin-top:-5px}.student-home-copy p{color:var(--lw-body);margin:15px 0 0;font-size:clamp(17px,1.55vw,22px);line-height:1.5}.student-home-state{z-index:3;place-items:center;display:grid;position:absolute;inset:122px 0 0}.student-home-error{z-index:12;width:min(600px,100% - 40px);position:absolute;top:138px;left:50%;transform:translate(-50%)}.student-composer-wrap{bottom:max(26px, env(safe-area-inset-bottom));z-index:30;width:min(1030px,100% - 48px);position:fixed;left:50%;transform:translate(-50%)}.student-composer{border:1px solid var(--lw-line);background:var(--lw-surface);min-height:78px;box-shadow:none;-webkit-backdrop-filter:blur(18px);backdrop-filter:blur(18px);border-radius:32px;grid-template-columns:54px minmax(0,1fr) 58px;align-items:center;gap:8px;padding:9px 11px;transition:border-color .18s,box-shadow .18s;display:grid}.student-composer:focus-within{border-color:var(--student-cyan);box-shadow:none}.student-composer__plus,.student-composer__send{border:0;border-radius:50%;place-items:center;width:54px;height:54px;display:grid}.student-composer__plus{background:var(--lw-surface);color:var(--lw-body)}.student-composer__plus svg{width:28px}.student-composer__send{background:var(--student-primary);box-shadow:none;color:var(--lw-inverse)}.student-composer__send:disabled{background:var(--lw-surface);box-shadow:none;color:var(--lw-body)}.student-composer__send svg{width:27px}.student-composer textarea{resize:none;width:100%;min-height:46px;max-height:108px;color:var(--student-ink);font-size:var(--text-size-input);background:0 0;border:0;outline:none;padding:11px 12px;line-height:24px;overflow-y:auto}.student-composer textarea::placeholder{color:var(--lw-body)}.student-composer-error{border:1px solid var(--lw-line);background:var(--lw-surface);width:fit-content;max-width:100%;box-shadow:none;color:var(--lw-warning);font-size:var(--text-size-caption);border-radius:14px;margin:0 auto 9px;padding:10px 15px;line-height:1.5}.student-attachment-menu{border:1px solid var(--student-line);background:var(--lw-surface);width:286px;box-shadow:none;border-radius:24px;flex-direction:column;padding:9px;display:flex;position:absolute;bottom:calc(100% + 12px);left:0}.student-attachment-menu button{min-height:64px;color:var(--student-ink);text-align:left;background:0 0;border:0;border-radius:17px;grid-template-columns:46px minmax(0,1fr);align-items:center;gap:11px;padding:8px;display:grid}.student-attachment-menu button:hover{background:var(--lw-surface)}.student-attachment-menu button>span{background:var(--lw-surface);width:46px;height:46px;color:var(--student-primary);border-radius:15px;place-items:center;display:grid}.student-attachment-menu svg{width:23px}.student-attachment-menu strong,.student-attachment-menu small{display:block}.student-attachment-menu strong{font-size:var(--text-size-body)}.student-attachment-menu small{color:var(--student-muted);font-size:var(--text-size-caption);margin-top:3px}.student-attachment-preview{border:1px solid var(--student-line);background:var(--lw-surface);width:min(520px,100%);min-height:68px;box-shadow:none;border-radius:20px;grid-template-columns:54px minmax(0,1fr) 44px;align-items:center;gap:11px;margin:0 0 10px;padding:7px 8px;display:grid}.student-attachment-preview>img,.student-attachment-preview__file{object-fit:cover;border-radius:15px;width:54px;height:54px}.student-attachment-preview__file{background:var(--lw-surface);color:var(--student-primary);place-items:center;display:grid}.student-attachment-preview__file svg{width:25px}.student-attachment-preview strong,.student-attachment-preview span{text-overflow:ellipsis;white-space:nowrap;display:block;overflow:hidden}.student-attachment-preview strong{font-size:var(--text-size-body)}.student-attachment-preview div>span{color:var(--student-muted);font-size:var(--text-size-caption);margin-top:4px}.student-attachment-preview button{background:var(--lw-surface);width:44px;height:44px;color:var(--lw-body);border:0;border-radius:50%;place-items:center;display:grid}.student-attachment-preview button svg{width:20px}.student-drawer-layer{z-index:80;background:var(--lw-overlay);justify-content:flex-end;display:flex;position:fixed;inset:0}.student-history-drawer{background:var(--lw-surface);width:min(420px,100%);height:100%;box-shadow:none;flex-direction:column;display:flex}.student-history-drawer>header{border-bottom:1px solid var(--student-line);justify-content:space-between;align-items:center;min-height:84px;padding:0 24px;display:flex}.student-history-drawer>header>div{align-items:center;gap:12px;display:flex}.student-history-drawer header h2{margin:0;font-size:21px}.student-history-drawer header svg{width:23px;color:var(--student-primary)}.student-history-drawer header button{background:var(--lw-surface);width:48px;height:48px;color:var(--student-muted);border:0;border-radius:50%;place-items:center;display:grid}.student-history-drawer__body{flex:1;min-height:0;padding:14px;overflow-y:auto}.student-history-drawer__body>a{background:var(--lw-surface);content-visibility:auto;contain-intrinsic-size:92px;border:1px solid #0000;border-radius:6px;flex-direction:column;gap:5px;min-height:92px;margin-bottom:8px;padding:16px 20px;display:flex;position:relative}.student-history-drawer__body>a:hover,.student-history-drawer__body>a.is-current{border-color:var(--lw-line);background:var(--lw-surface)}.student-history-drawer__body a strong{font-size:var(--text-size-body);padding-right:70px}.student-history-drawer__body a span{color:var(--student-muted);font-size:var(--text-size-caption);text-overflow:ellipsis;white-space:nowrap;overflow:hidden}.student-history-drawer__body a time{color:var(--lw-body);font-size:var(--text-size-caption);position:absolute;top:17px;right:18px}.student-chat-page{background:var(--lw-page);height:100dvh;overflow:hidden}.student-chat-stage{width:min(980px,100% - 40px);height:calc(100dvh - 200px);margin:0 auto;padding:18px 0 0}.student-chat-stage>.student-error-notice{margin-bottom:10px}.student-chat-list{overscroll-behavior:contain;scrollbar-gutter:stable;height:100%;padding:4px 18px 38px;overflow-y:auto}.student-load-older{border:1px solid var(--student-line);background:var(--lw-surface);min-height:44px;color:var(--student-primary);font-size:var(--text-size-caption);border-radius:999px;margin:0 auto 18px;padding:0 18px;font-weight:650;display:block}.student-chat-message{content-visibility:auto;contain-intrinsic-size:120px;gap:10px;width:100%;margin:15px 0;display:flex}.student-chat-message--student{justify-content:flex-end}.student-chat-message__avatar{border:1.5px solid var(--lw-line);background:var(--lw-inset);border-radius:50%;flex:none;width:36px;height:36px;position:relative;overflow:hidden}.student-chat-message__avatar img{width:54px;max-width:none;height:auto;position:absolute;top:-4px;left:50%;transform:translate(-50%)}.student-chat-message__content{flex-direction:column;align-items:flex-start;width:min(78%,720px);display:flex}.student-chat-message--student .student-chat-message__content{align-items:flex-end}.student-chat-message__role{color:var(--student-muted);font-size:var(--text-size-caption);margin:0 4px 5px;font-weight:650}.student-chat-message__bubble{border:1px solid var(--student-line);background:var(--lw-surface);max-width:100%;color:var(--lw-ink);font-size:var(--text-size-reading);box-shadow:none;border-radius:14px;padding:13px 16px;line-height:1.85}.student-chat-message--student .student-chat-message__bubble{border-color:var(--lw-line);background:var(--lw-inset);border-radius:20px 7px 20px 20px}.student-learning-card{border:1px solid var(--lw-line);background:var(--lw-inset);width:100%;box-shadow:none;border-radius:20px;margin-top:10px;padding:15px 17px}.student-learning-card header,.student-learning-card header span{align-items:center;display:flex}.student-learning-card header{justify-content:space-between;gap:12px}.student-learning-card header span{color:var(--student-primary);font-size:var(--text-size-caption);gap:6px;font-weight:750}.student-learning-card header svg{width:16px}.student-learning-card header small{color:var(--student-muted)}.student-learning-card h3{font-size:var(--text-size-reading);margin:10px 0 5px}.student-learning-card footer{color:var(--student-primary);font-size:var(--text-size-caption);margin-top:10px;font-weight:650}.student-chat-next-steps{margin-top:6px}.student-homework-report{overflow-wrap:anywhere}.student-homework-report__counts{color:var(--student-muted);font-size:var(--text-size-caption)}.student-homework-item{border-top:1px solid var(--lw-line);margin-top:18px;padding-top:16px}.student-homework-item h3{flex-wrap:wrap;align-items:baseline;gap:10px;display:flex}.student-homework-item__status{font-size:var(--text-size-caption);color:var(--student-muted)}.student-homework-item[data-outcome=correct] .student-homework-item__status{color:var(--student-primary)}.student-homework-item[data-outcome=incorrect] .student-homework-item__status,.student-homework-item[data-outcome=partially_correct] .student-homework-item__status{color:var(--lw-danger,var(--student-muted))}.student-homework-item ol{padding-left:24px}.student-homework-item li+li{margin-top:8px}.student-homework-item details{margin-top:10px}.student-homework-item summary{cursor:pointer;min-height:44px;color:var(--student-primary);padding:10px 4px;display:list-item}.student-homework-answer{margin-top:12px}.student-homework-item summary:focus-visible{outline:2px solid var(--student-primary);outline-offset:2px}.student-chat-next-steps>summary{width:fit-content;min-height:44px;color:var(--lw-muted);font-size:var(--text-size-caption);cursor:pointer;align-items:center;gap:8px;list-style:none;display:flex}.student-chat-next-steps>summary::-webkit-details-marker{display:none}.student-chat-next-steps>summary:after{content:"+"}.student-chat-next-steps[open]>summary:after{content:"−"}.student-chat-next-steps>summary:focus-visible{outline:2px solid var(--student-primary);outline-offset:3px}.student-chat-actions{flex-wrap:wrap;gap:8px;margin-top:10px;display:flex}.student-chat-actions button{border:1px solid var(--lw-line);background:var(--lw-surface);min-height:42px;color:var(--student-primary);font-size:var(--text-size-caption);border-radius:999px;padding:0 15px;font-weight:650}.student-rich-text{overflow-wrap:anywhere;min-width:0}.student-rich-text__gap{height:.65em}.student-rich-text__list{grid-template-columns:14px minmax(0,1fr);gap:5px;display:grid}.student-rich-text-loading{color:var(--student-muted);font-size:var(--text-size-caption)}.student-math--display{max-width:100%;padding:4px 0;display:block;overflow-x:auto}.student-math .katex-display,.student-formula .katex-display{margin:.4em 0;overflow:auto hidden}.student-pulse-page,.student-learning-page,.student-my-page{background:var(--lw-page);min-height:100dvh}.student-pulse-shell,.student-learning-shell,.student-my-shell{width:min(1120px,100% - 48px);margin:0 auto;padding:34px 0 72px}.student-pulse-header{border:1px solid var(--lw-line);background:var(--lw-inset);box-shadow:none;border-radius:28px;justify-content:space-between;align-items:center;gap:24px;padding:25px 28px;display:flex}.student-pulse-header>div,.student-pulse-header dl{align-items:center;display:flex}.student-pulse-header>div{gap:16px}.student-pulse-header h2{letter-spacing:-.03em;margin:0;font-size:25px}.student-pulse-header p{color:var(--student-muted);margin:6px 0 0}.student-pulse-header dl{gap:10px;margin:0}.student-pulse-header dl div{border:1px solid var(--lw-line);background:var(--lw-surface);border-radius:16px;min-width:92px;padding:10px 14px}.student-pulse-header dt{color:var(--student-muted);font-size:var(--text-size-caption)}.student-pulse-header dd{color:var(--student-primary);font-size:var(--text-size-body);margin:4px 0 0;font-weight:750}.student-pulse-dates{scrollbar-width:thin;gap:9px;margin:22px 0;padding:2px 0 6px;display:flex;overflow-x:auto}.student-pulse-dates button{border:1px solid var(--student-line);background:var(--lw-surface);min-width:76px;min-height:58px;color:var(--student-muted);border-radius:17px;flex-direction:column;flex:none;justify-content:center;align-items:center;padding:7px 12px;display:flex}.student-pulse-dates button.is-selected{border-color:var(--student-primary);background:var(--student-primary);box-shadow:none;color:var(--lw-inverse)}.student-pulse-dates strong{font-size:var(--text-size-caption)}.student-pulse-dates span{font-size:var(--text-size-caption);margin-top:3px}.student-pulse-cards{grid-template-columns:repeat(2,minmax(0,1fr));gap:17px;display:grid}.student-pulse-partial{border:1px solid var(--lw-line);background:var(--lw-surface);color:var(--lw-warning);font-size:var(--text-size-caption);border-radius:16px;grid-column:1/-1;padding:13px 17px}.student-pulse-card{border:1px solid var(--student-line);background:var(--lw-surface);min-height:244px;color:var(--student-ink);text-align:left;box-shadow:none;border-radius:25px;flex-direction:column;align-items:flex-start;padding:23px;transition:transform .18s,border-color .18s,box-shadow .18s;display:flex;position:relative;overflow:hidden}.student-pulse-card:not(:disabled):hover{border-color:var(--lw-line);box-shadow:none;transform:translateY(-3px)}.student-pulse-card:disabled{opacity:.62}.student-pulse-card__type,.student-pulse-card__status{font-size:var(--text-size-caption);border-radius:999px;align-items:center;font-weight:720;display:inline-flex}.student-pulse-card__type{background:var(--lw-surface);color:var(--student-primary);gap:5px;padding:6px 10px}.student-pulse-card__type svg{width:15px}.student-pulse-card__status{background:var(--lw-surface);color:var(--student-muted);padding:6px 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