:root{color:#283a32;font-synthesis:none;--accent:#315f4b;--muted:#768078;--border:#e2e7df;--white:#fff;background:#f7f8f5;font-family:Inter,-apple-system,BlinkMacSystemFont,Segoe UI,Noto Sans JP,Meiryo,sans-serif;font-size:14px}*{box-sizing:border-box}body{margin:0}button,input,select,textarea{font:inherit}button{cursor:pointer;transition:background .15s,box-shadow .15s}button:disabled{cursor:not-allowed;opacity:.5}button:focus-visible,input:focus-visible,textarea:focus-visible,select:focus-visible,a:focus-visible{outline-offset:3px;outline:3px solid #a4c6b5}button{color:inherit;background:0 0;border:0}input,select,textarea{border:1px solid var(--border);color:inherit;background:#fff;border-radius:8px;max-width:100%;padding:11px 12px}input[type=checkbox]{width:17px;height:17px;accent-color:var(--accent);flex-shrink:0}label{flex-direction:column;gap:9px;font-size:13px;font-weight:600;display:flex}select{min-width:160px}textarea{resize:vertical;line-height:1.8}h1{letter-spacing:.01em;margin:0 0 24px;font-size:26px;font-weight:650}h2{margin:0 0 18px;font-size:16px;font-weight:650}p{line-height:1.85}a{color:var(--accent)}.muted{color:var(--muted)}.small{font-size:12px}.block{display:block}.wide{width:100%}.primary,.secondary{border-radius:8px;justify-content:center;align-items:center;gap:8px;padding:11px 18px;font-size:13px;font-weight:600;display:inline-flex}.primary{background:var(--accent);color:#fff}.primary:hover:not(:disabled){background:#244b3a}.secondary{border:1px solid var(--border);background:#fff}.secondary:hover:not(:disabled){background:#f1f4ed}.text-button{color:var(--accent);padding:8px 0;font-size:13px}.icon-button{color:#768078;border-radius:6px;justify-content:center;align-items:center;padding:7px;display:inline-flex}.icon-button:hover{background:#e9eee7}.brand{letter-spacing:.06em;align-items:center;gap:11px;font-size:18px;display:flex}.brand>span{background:var(--accent);color:#fff;border-radius:11px;justify-content:center;align-items:center;width:37px;height:37px;display:flex}.app-shell{min-height:100vh;display:flex}.sidebar{z-index:20;background:#f0f2eb;border-right:1px solid #e0e5dc;flex-direction:column;width:250px;padding:32px 22px 18px;display:flex;position:fixed;inset:0 auto 0 0}.new-chat{background:#fff;border:1px solid #d8dfd3;border-radius:9px;justify-content:center;align-items:center;gap:10px;margin:35px 0 21px;padding:13px;font-weight:600;display:flex;box-shadow:0 2px 3px #20302204}.sidebar nav{flex-direction:column;gap:5px;display:flex}.sidebar nav button{text-align:left;color:#6a776a;border-radius:8px;align-items:center;gap:12px;padding:13px 14px;display:flex}.sidebar nav button.active{color:#315f4b;background:#e1e8da;font-weight:650}.nav-dot{background:var(--accent);border-radius:50%;width:5px;height:5px;margin-left:auto}.sidebar-bottom{margin-top:auto;padding-top:30px}.balance-card{background:#ffffff80;border:1px solid #dce2d7;border-radius:10px;padding:17px}.balance-card>span{color:#69766a;font-size:12px}.balance-card strong{margin:8px 0;font-size:30px;font-weight:650;display:block}.balance-card small{margin-left:7px;font-size:13px;font-weight:400}.balance-parts{color:#859080;font-size:10px}.balance-card button{color:#617559;border-top:1px solid #e0e7da;justify-content:space-between;width:100%;margin-top:14px;padding:11px 0 0;font-size:11px;display:flex}.account{align-items:center;gap:10px;margin-top:22px;display:flex}.avatar{color:#5e7158;background:#dfe6d8;border-radius:50%;place-items:center;width:33px;height:33px;font-size:12px;display:grid}.account b{font-size:12px;display:block}.account small{color:var(--muted);margin-top:3px;font-size:10px;display:block}.account>.icon-button{margin-left:auto}.footer-links{flex-wrap:wrap;gap:10px;margin-top:23px;display:flex}.footer-links button{color:#7c8877;padding:0;font-size:10px}.workspace{width:calc(100% - 250px);margin-left:250px}.topbar{border-bottom:1px solid var(--border);background:#fcfdfb;align-items:center;height:74px;padding:0 42px;font-size:13px;display:flex}.topbar-right{align-items:center;gap:14px;margin-left:auto;display:flex}.level{color:var(--muted);font-size:12px}.tag{white-space:nowrap;color:#6c7868;background:#fbfcf8;border:1px solid #dce3d8;border-radius:6px;align-items:center;padding:5px 9px;font-size:11px;display:inline-flex}.page{max-width:1180px;margin:0 auto;padding:38px 42px 55px}.page.narrow{max-width:730px}.page-title{justify-content:space-between;align-items:center;margin-bottom:22px;display:flex}.page-title h1{margin-bottom:0}.eyebrow{color:#879281;letter-spacing:.08em;margin:0 0 9px;font-size:11px}.panel{border:1px solid var(--border);background:#fff;border-radius:12px;margin-bottom:22px;padding:25px}.form-stack{flex-direction:column;gap:21px;display:flex}.form-stack .primary{align-self:flex-start}.check{flex-direction:row;align-items:flex-start;gap:9px;font-size:12px;font-weight:400;line-height:1.8}.error{color:#9f4635;background:#fff2ee;border:1px solid #f0d4ca;border-radius:8px;align-items:flex-start;gap:9px;margin:15px 0;padding:13px 16px;font-size:13px;line-height:1.7;display:flex}.error[hidden]{display:none}.error svg{flex-shrink:0;margin-top:3px}.success{color:#315f4b;font-size:12px}.notice{color:#817040;background:#fbf8ee;border:1px solid #e5dfc9;border-radius:8px;margin:20px 0;padding:15px 18px;font-size:12px;line-height:1.8}.loading{min-height:50vh;color:var(--muted);justify-content:center;align-items:center;gap:10px;display:flex}.spin{animation:1s linear infinite spin}@keyframes spin{to{transform:rotate(360deg)}}.chat-page{max-width:870px;margin:auto;padding:35px 36px 40px}.chat-page.new{padding-top:62px}.chat-heading{justify-content:space-between;align-items:flex-start;gap:20px;margin-bottom:24px;display:flex}.chat-heading h1{overflow-wrap:anywhere;margin:0;font-size:23px;line-height:1.6}.subject-row{align-items:flex-end;gap:20px;margin-bottom:25px;display:flex}.subject-row label{gap:8px}.subject-row>span{padding-bottom:13px}.mode-grid{grid-template-columns:repeat(3,1fr);gap:12px;margin-bottom:22px;display:grid}.mode{border:1px solid var(--border);text-align:left;background:#fff;border-radius:10px;padding:17px}.mode.selected{background:#f0f5ed;border-color:#72947d;box-shadow:0 0 0 1px #72947d20}.mode>div{justify-content:space-between;align-items:center;gap:8px;display:flex}.mode b{font-size:13px}.mode>div span{color:#76846f;font-size:11px}.mode small{color:#819078;margin-top:8px;font-size:10px;line-height:1.8;display:block}.composer{background:#fff;border:1px solid #cad5c5;border-radius:12px;overflow:hidden;box-shadow:0 4px 15px #263e2610}.composer textarea{resize:vertical;background:0 0;border:0;outline:none;width:100%;min-height:95px;padding:20px;font-size:14px}.composer textarea::placeholder{color:#9aa196}.composer-actions{justify-content:space-between;align-items:center;gap:12px;padding:10px 16px 14px;display:flex}.composer-actions>div{flex-wrap:wrap;align-items:center;gap:15px;display:flex}.send{background:var(--accent);color:#fff;border-radius:8px;flex-shrink:0;place-items:center;width:37px;height:37px;display:grid}.attach-button{color:#6c7c63;align-items:center;gap:6px;font-size:12px;display:flex}.composer-note{text-align:center;color:#899280;margin:12px 0;font-size:10px}.attachment{align-items:flex-start;gap:7px;margin-bottom:12px;display:flex}.attachment img{object-fit:contain;border:1px solid var(--border);border-radius:8px;max-width:200px;height:100px}.submitted-photo{object-fit:contain;border:1px solid var(--border);border-radius:8px;max-width:100%;max-height:240px}.user-message{white-space:pre-wrap;overflow-wrap:anywhere;background:#eaf0e5;border-radius:12px 12px 3px;margin:22px 0 20px 45px;padding:16px 20px}.user-message>span{color:#819078;font-size:10px}.user-message p{margin:6px 0 0}.teacher-message{border:1px solid var(--border);background:#fff;border-radius:12px;margin-bottom:22px;padding:23px 25px}.teacher-label{align-items:center;gap:9px;margin-bottom:15px;font-size:12px;display:flex}.teacher-icon{color:#52704a;background:#edf2e7;border-radius:8px;place-items:center;width:28px;height:28px;display:grid}.teacher-label>span:not(.teacher-icon){color:#8f9987;font-size:9px}.teacher-label time{color:#929b8d;margin-left:auto;font-size:10px}.markdown{overflow-wrap:anywhere;font-size:14px;line-height:1.95}.markdown p{margin:10px 0;line-height:1.95}.markdown li{margin:7px 0}.markdown pre{background:#f4f6f0;border-radius:6px;padding:14px;overflow:auto}.markdown table{font-size:12px}.katex-display{padding:4px 0;overflow:auto hidden}.feedback{border-top:1px solid #edf0e8;flex-wrap:wrap;gap:10px;margin-top:20px;padding-top:13px;display:flex}.feedback button{color:#7b8871;border:1px solid #e1e7db;border-radius:5px;padding:5px 8px;font-size:10px}.feedback button.selected{color:#42633b;background:#e4eddd;border-color:#aec29c}.followups{flex-wrap:wrap;gap:8px;margin-bottom:13px;display:flex}.followups button{border:1px solid var(--border);color:#708165;background:#fff;border-radius:7px;padding:8px 12px;font-size:11px}.pending{color:#74846b;align-items:center;gap:9px;margin:25px;font-size:12px;display:flex}.call-error{color:#9c6049;background:#fbf0eb;border-radius:7px;padding:13px;font-size:12px}.continue{text-align:center}.history-list{border:1px solid var(--border);background:#fff;border-radius:12px;overflow:hidden}.history-row{border-bottom:1px solid #edf0e8;align-items:center;gap:10px;padding:14px 20px;display:flex}.history-row:last-child{border:0}.history-row>button:first-child{text-align:left;flex:1;align-items:center;gap:15px;min-width:0;padding:5px 0;display:flex}.history-row b{text-overflow:ellipsis;white-space:nowrap;max-width:500px;font-size:13px;font-weight:600;display:block;overflow:hidden}.history-row small{color:#89937f;margin-top:7px;font-size:10px;display:block}.history-row>button>div{flex:1;min-width:0}.subject-icon{color:#78886a;background:#f0f4e9;border-radius:9px;flex-shrink:0;place-items:center;width:38px;height:38px;font-size:12px;display:grid}.empty{text-align:center;color:#89937f;padding:60px}.empty-text{text-align:center;color:#8a947f;padding:30px;font-size:13px}.current-plan{align-items:center;gap:40px;display:flex}.current-plan h2{margin:8px 0 0;font-size:35px}.current-plan h2 small{margin-left:8px;font-size:13px}.current-plan p{margin:3px 0;font-size:12px}.payer{margin:20px 0}.plans-grid{grid-template-columns:repeat(3,1fr);gap:17px;display:grid}.plan{flex-direction:column;padding:22px;display:flex}.plan.featured{border-color:#8ea783}.plan h2{font-size:14px}.plan-price{white-space:nowrap;letter-spacing:-.04em;font-size:29px}.plan-price small{color:#88917f;letter-spacing:0;font-size:11px}.plan p{font-size:12px}.plan ul{color:#76826b;margin-bottom:25px;padding-left:17px;font-size:11px;line-height:2.4}.plan button{width:100%;margin-top:auto}.rules{color:#78846e;line-height:1.8}.login{background:#f0f3eb;justify-content:center;align-items:center;min-height:100vh;padding:30px;display:flex}.login-card{background:#fff;border:1px solid #e0e5da;border-radius:16px;width:100%;max-width:445px;padding:38px;box-shadow:0 12px 60px #30462608}.login-card h1{margin:32px 0 12px;font-size:22px}.login-card form{flex-direction:column;gap:18px;margin-top:25px;display:flex}.login-card .muted{font-size:12px}.local-note{background:#f4f1e7;margin:0;padding:10px;font-size:11px;line-height:1.8}.onboarding{max-width:580px;margin:60px auto;padding:20px}.onboarding h1{margin-top:35px}.legal{line-height:2}.legal .brand{margin:25px 0}.legal p{font-size:13px}.legal dt{border-top:1px solid var(--border);padding-top:18px;font-size:12px;font-weight:600}.legal dd{margin:7px 0 18px;font-size:13px}.admin-page{max-width:1250px}.admin-tabs{border-bottom:1px solid var(--border);white-space:nowrap;gap:26px;margin-bottom:25px;display:flex;overflow:auto}.admin-tabs button{color:#859079;border-bottom:2px solid #0000;padding:15px 0;font-size:12px}.admin-tabs button.active{border-color:var(--accent);color:var(--accent);font-weight:600}.date-filter{flex-wrap:wrap;align-items:flex-end;gap:12px;margin:22px 0;display:flex}.date-filter label{gap:7px;font-size:11px}.date-filter input{padding:9px;font-size:12px}.date-filter>span{color:#86917a;padding-bottom:10px}.date-filter small{color:#8a957d;margin:auto 0 10px;font-size:10px}.metric-grid{grid-template-columns:repeat(4,1fr);gap:15px;display:grid}.metric{min-width:0;padding:20px}.metric>div{color:#819075;justify-content:space-between;gap:10px;font-size:11px;display:flex}.metric strong{letter-spacing:-.04em;margin:19px 0 11px;font-size:30px;display:block}.metric small{color:#8c967f;font-size:10px;line-height:1.7;display:block}.dashboard-grid{grid-template-columns:1.7fr 1fr;gap:20px;display:grid}.section-title{justify-content:space-between;align-items:center;margin-bottom:20px;display:flex}.section-title h2{margin:0}.chart{margin-top:22px}.chart svg{width:100%;height:auto}.empty-chart{color:#939c88;background:repeating-linear-gradient(0deg,#0000,#0000 53px,#f0f2eb 54px);justify-content:center;align-items:center;min-height:220px;font-size:11px;display:flex}.feedback-stats>div{color:#78856d;align-items:center;gap:9px;margin:20px 0;font-size:12px;display:flex}.feedback-stats b{color:#374830;margin-left:auto;font-weight:600}.dot{border-radius:50%;width:7px;height:7px}.dot.green{background:#6b9371}.dot.gold{background:#c1a966}.dot.red{background:#c98c75}.stat-line{color:#829073;border-top:1px solid #eef1e8;justify-content:space-between;margin-top:12px;padding-top:12px;font-size:11px;display:flex}.stat-line b{color:#526946}.table-scroll{overflow:auto}table{border-collapse:collapse;text-align:left;width:100%;font-size:12px}th{color:#88967b;white-space:nowrap;background:#f6f8f2;padding:12px 15px;font-size:10px;font-weight:500}td{white-space:nowrap;border-bottom:1px solid #edf1e6;padding:15px}td b{font-weight:500}td small{margin-top:5px;font-size:10px}tr:last-child td{border-bottom:0}.search{gap:10px;margin:20px 0;display:flex}.search input{width:100%;max-width:400px}.export-list>div{border-top:1px solid #edf0e8;align-items:center;gap:10px;padding:20px 0;display:flex}.export-list>div>div{flex:1}.export-list b{font-size:13px;font-weight:500}.export-list small{color:#829073;margin-top:6px;font-size:11px;display:block}.settings-grid{grid-template-columns:1fr 1fr;gap:20px;display:grid}.settings-grid label{font-size:11px}.audit-detail{white-space:normal;overflow-wrap:anywhere;max-width:420px;font-size:10px;line-height:1.8}.mobile-menu,.mobile-close{display:none}.scrim{z-index:15;background:#14291560;position:fixed;inset:0}@media (width>=1500px){.chat-page{padding-top:65px}}@media (width<=1150px){.sidebar{width:220px;padding-left:17px;padding-right:17px}.workspace{width:calc(100% - 220px);margin-left:220px}.page{padding:30px 25px}.topbar{padding:0 25px}.metric-grid{grid-template-columns:repeat(2,1fr)}.plans-grid{grid-template-columns:1fr}.plan ul{margin-top:0}.plan{grid-template-columns:1fr 1fr;gap:10px;display:grid}.plan ul{grid-area:1/2/4}.plan button{grid-column:1/3}.plan h2,.plan p{margin:0}.dashboard-grid{grid-template-columns:1fr}}@media (width<=750px){.sidebar{width:250px;transition:transform .2s;transform:translate(-100%)}.sidebar.open{transform:translate(0)}.workspace{width:100%;margin-left:0}.topbar{height:61px;padding:0 17px}.mobile-menu{margin-right:12px;display:flex}.mobile-close{display:flex;position:absolute;top:10px;right:12px}.page{padding:25px 17px}.chat-page,.chat-page.new{padding:28px 17px}.chat-heading h1{font-size:21px}.mode-grid{gap:7px}.mode{padding:12px 9px}.mode>div{flex-direction:column;align-items:flex-start;gap:6px}.mode b{font-size:11px}.mode small{font-size:9px}.composer textarea{padding:15px;font-size:14px}.composer-actions{padding:8px 12px 12px}.composer-actions .small{font-size:10px}.user-message{margin-left:20px}.teacher-message{padding:18px}.panel{padding:20px 17px}.current-plan{gap:25px}.metric-grid{gap:9px}.metric strong{font-size:26px}.metric small{font-size:9px}.metric>div{font-size:10px}.admin-tabs{gap:22px}.date-filter{gap:8px}.date-filter small{width:100%}.settings-grid{grid-template-columns:1fr}.export-list>div{flex-wrap:wrap}.export-list>div>div{flex-basis:100%}.history-row{padding:13px 11px}.history-row>button:first-child{gap:9px}.history-row .tag{display:none}.login-card{padding:27px}.login{padding:20px}.login-card .brand{font-size:17px}.topbar-right .tag{font-size:9px}.plan-price{font-size:25px}.plan ul{font-size:10px}.composer-note{font-size:9px}}.credit-adjust{margin-left:14px}.landing{max-width:1200px;margin:auto;padding:28px 36px 20px}.landing-header,.landing-footer,.shared-header{justify-content:space-between;align-items:center;gap:20px;display:flex}.landing-header{padding-bottom:42px}.landing-header>a{font-size:13px;text-decoration:none}.landing-grid{grid-template-columns:minmax(0,1.4fr) minmax(320px,.85fr);align-items:start;gap:62px;display:grid}.landing-intro h1{letter-spacing:.06em;margin:12px 0 16px;font-size:44px}.landing-description{color:#58665d;margin-bottom:28px;font-size:16px;line-height:2}.landing-art{border-radius:18px;width:100%;height:auto;display:block}.teacher-avatar{object-fit:cover;border:1px solid #e8e4d9;border-radius:50%;flex-shrink:0;width:44px;height:44px}.teacher-caption{align-items:center;gap:14px;margin-top:20px;display:flex}.teacher-caption p{color:var(--muted);margin:5px 0;font-size:12px}.teacher-caption b{font-weight:550}.landing-access{padding-top:18px;scroll-margin-top:20px}.landing .login-card{border:1px solid var(--border);background:#fff;border-radius:16px;width:100%;padding:30px;box-shadow:0 14px 40px #254a3510}.landing .login-card h2{margin-bottom:16px;font-size:20px}.landing-price{border:1px solid var(--border);background:#f0f3ed;border-radius:14px;margin-top:18px;padding:24px 26px}.landing-price p{justify-content:space-between;gap:10px;margin:12px 0;display:flex}.landing-price p span{color:#657166;font-size:12px}.landing-price small{color:#657166;margin-top:10px;font-size:11px;line-height:1.9;display:block}.landing-how{border-top:1px solid var(--border);margin-top:40px;padding:42px 0}.landing-how>div{grid-template-columns:repeat(3,1fr);gap:40px;display:grid}.landing-how article>span{color:#90a48c;font-family:Georgia,serif;font-size:27px}.landing-how h3{font-size:15px;font-weight:600}.landing-how p{color:var(--muted);font-size:13px}.landing-footer{border-top:1px solid var(--border);padding-top:24px;font-size:12px}.new-teacher{background:#f0f2ea;border:1px solid #e3e7dc;border-radius:14px;gap:22px;margin:0 0 26px;display:flex;overflow:hidden}.new-teacher>img{object-fit:cover;object-position:65% center;width:180px}.new-teacher>div{padding:20px 20px 18px 0}.new-teacher .teacher-avatar{display:none}.new-teacher p{color:#657166;margin:8px 0 0;font-size:13px}.thinking-card{background:#f0f3ee;border:1px solid #dce5d9;border-radius:14px;align-items:center;gap:14px;min-height:96px;margin:20px 0;padding:20px 22px;display:flex}.thinking-card b{font-size:14px;font-weight:550}.thinking-card p{color:#69746a;margin:6px 0 0;font-size:12px}.thinking-dots{flex-shrink:0;gap:5px;margin-left:auto;display:flex}.thinking-dots i{background:#718f70;border-radius:50%;width:6px;height:6px;animation:1.3s ease-in-out infinite thinking}.thinking-dots i:nth-child(2){animation-delay:.16s}.thinking-dots i:nth-child(3){animation-delay:.32s}@keyframes thinking{0%,70%,to{opacity:.4;transform:translateY(0)}35%{opacity:1;transform:translateY(-6px)}}.share-controls{border-top:1px solid var(--border);margin:24px 0;padding:18px 0}.share-row{flex-wrap:wrap;align-items:center;gap:14px;display:flex}.share-row button{align-items:center;gap:6px;font-size:12px;display:inline-flex}.share-button{border-radius:8px;padding:10px 13px;background:#fff!important;border:1px solid #cbd7c9!important}.share-controls>p{max-width:620px;margin:10px 0 0;font-size:11px}.share-details{background:#f0f3ee;border-radius:10px;margin-top:14px;padding:18px}.share-details input{width:100%;font-size:12px}.share-details .share-row{margin-top:14px}.share-details a{font-size:12px}.shared-page{max-width:850px;margin:auto;padding:28px 28px 60px}.shared-header{border-bottom:1px solid var(--border);margin-bottom:34px;padding-bottom:30px}.shared-header>a{font-size:18px;font-weight:650;text-decoration:none}.shared-page h1{overflow-wrap:anywhere}.shared-page .messages{min-height:0}.shared-footer{border-top:1px solid var(--border);color:var(--muted);padding:20px 0;font-size:12px}.teacher-label .teacher-avatar{width:34px;height:34px}.chat-heading h1{overflow-wrap:anywhere}@media (width<=760px){.landing{padding:22px 20px}.landing-header{padding-bottom:26px}.landing-grid{grid-template-columns:1fr;gap:24px}.landing-intro h1{font-size:34px}.landing-description{margin-bottom:20px;font-size:14px}.landing-art{object-fit:cover;object-position:center 40%;max-height:280px}.landing-access{padding:0}.landing .login-card{padding:24px}.landing-how{margin-top:32px;padding:28px 0}.landing-how>div{grid-template-columns:1fr;gap:14px}.landing-how article{grid-template-columns:40px 1fr;column-gap:10px;display:grid}.landing-how article>span{grid-row:span 2;align-self:start;padding-top:8px}.landing-how h3{margin:12px 0 0}.landing-how p{margin:5px 0}.landing-footer{flex-direction:column;align-items:flex-start;gap:10px}.new-teacher>img{width:110px}.new-teacher{gap:14px;margin-bottom:20px}.new-teacher>div{padding:14px 12px 14px 0}.new-teacher p{font-size:12px}.thinking-card{gap:10px;padding:16px 12px}.thinking-card b{font-size:12px}.thinking-card p{font-size:11px}.thinking-card .teacher-avatar{width:36px;height:36px}.thinking-dots{gap:3px}.thinking-dots i{width:5px;height:5px}.shared-page{padding:20px 18px 40px}.shared-header{gap:10px}.shared-header>a{font-size:16px}.share-row{gap:12px}.share-details{padding:12px}.desktop-break{display:none}}@media (prefers-reduced-motion:reduce){.thinking-dots i,.spin{animation:none!important}*{scroll-behavior:auto!important}}.auth-tabs{border-bottom:1px solid var(--border);margin-bottom:24px;display:flex}.auth-tabs button{color:var(--muted);border-bottom:2px solid #0000;flex:1;padding:12px 4px}.auth-tabs button[aria-pressed=true]{color:var(--accent);border-color:var(--accent);font-weight:650}.auth-form,.registration-page form,.legacy-login form{flex-direction:column;gap:18px;display:flex}.auth-form .notice{margin:0}.turnstile-container{min-width:0}.turnstile-container:empty{display:none}.registration-sent{padding:8px 0}.registration-sent a{overflow-wrap:anywhere}.legacy-login{border-top:1px solid var(--border);margin-top:24px;padding-top:16px}.legacy-login summary{color:var(--muted);cursor:pointer;font-size:12px}.registration-page{max-width:550px;margin:40px auto 70px;padding:0 20px}.registration-brand{text-align:center;margin-bottom:28px;font-size:22px;font-weight:650;text-decoration:none;display:block}.registration-page .login-card{border:1px solid var(--border);background:#fff;border-radius:16px;width:100%;padding:30px}.registration-page h1{margin-bottom:12px;font-size:22px}.registration-page input:not([type=checkbox]){width:100%}.registration-page .field-hint{color:var(--muted);margin:-10px 0 0;font-size:11px;line-height:1.8}.registration-page .check{font-size:12px;line-height:1.8}.registration-steps{color:#9a9f98;gap:16px;margin:0 0 30px;padding:0;font-size:11px;list-style:none;display:flex}.registration-steps li{text-align:center;border-bottom:2px solid #e5e8e2;flex:1;padding-bottom:8px}.registration-steps .active{color:var(--accent);border-color:var(--accent);font-weight:600}.registration-steps .done{color:#648568;border-color:#b7c7ad}.registration-back{margin-top:24px;font-size:12px;display:inline-block}.teacher-pair{gap:28px;margin-top:20px;display:flex}.teacher-pair>div{align-items:center;gap:10px;display:flex}.teacher-pair small{color:var(--muted);margin-top:4px;font-size:10px;display:block}.teacher-select{border:0;min-width:0;margin:0 0 24px;padding:0}.teacher-select legend{margin-bottom:12px;font-size:12px;font-weight:600}.teacher-options{gap:12px;display:flex}.teacher-options label{border:1px solid var(--border);cursor:pointer;background:#fff;border-radius:12px;flex-direction:row;flex:1;align-items:center;gap:12px;padding:14px 16px;display:flex;position:relative}.teacher-options label.selected{background:#eff3ea;border-color:#7c9c7c}.teacher-options input{width:15px;min-width:0;height:15px;accent-color:var(--accent)}.teacher-options small{color:var(--muted);margin-top:5px;font-size:10px;font-weight:400;display:block}.landing-art{object-fit:contain;object-position:center;height:auto;max-height:none}.registration-page .error{margin:16px 0}.landing-header .brand b{letter-spacing:.06em}@media (width<=760px){.landing-art{object-fit:contain;width:100%;height:auto;max-height:none}.teacher-pair{gap:24px}.teacher-pair .teacher-avatar{width:36px;height:36px}.teacher-pair span{font-size:12px}.teacher-options{gap:8px}.teacher-options label{gap:8px;padding:12px 9px;font-size:12px}.teacher-options .teacher-avatar{width:36px;height:36px}.registration-page{margin-top:24px}.registration-page .login-card{padding:24px 20px}.registration-steps{gap:8px}.landing-access .login-card{padding:24px 20px}}@font-face{font-display:block;font-family:KaTeX_AMS;font-style:normal;font-weight:400;src:url(/assets/KaTeX_AMS-Regular-BQhdFMY1.woff2)format("woff2"),url(/assets/KaTeX_AMS-Regular-DMm9YOAa.woff)format("woff"),url(/assets/KaTeX_AMS-Regular-DRggAlZN.ttf)format("truetype")}@font-face{font-display:block;font-family:KaTeX_Caligraphic;font-style:normal;font-weight:700;src:url(/assets/KaTeX_Caligraphic-Bold-Dq_IR9rO.woff2)format("woff2"),url(/assets/KaTeX_Caligraphic-Bold-BEiXGLvX.woff)format("woff"),url(/assets/KaTeX_Caligraphic-Bold-ATXxdsX0.ttf)format("truetype")}@font-face{font-display:block;font-family:KaTeX_Caligraphic;font-style:normal;font-weight:400;src:url(/assets/KaTeX_Caligraphic-Regular-Di6jR-x-.woff2)format("woff2"),url(/assets/KaTeX_Caligraphic-Regular-CTRA-rTL.woff)format("woff"),url(/assets/KaTeX_Caligraphic-Regular-wX97UBjC.ttf)format("truetype")}@font-face{font-display:block;font-family:KaTeX_Fraktur;font-style:normal;font-weight:700;src:url(/assets/KaTeX_Fraktur-Bold-CL6g_b3V.woff2)format("woff2"),url(/assets/KaTeX_Fraktur-Bold-BsDP51OF.woff)format("woff"),url(/assets/KaTeX_Fraktur-Bold-BdnERNNW.ttf)format("truetype")}@font-face{font-display:block;font-family:KaTeX_Fraktur;font-style:normal;font-weight:400;src:url(/assets/KaTeX_Fraktur-Regular-CTYiF6lA.woff2)format("woff2"),url(/assets/KaTeX_Fraktur-Regular-Dxdc4cR9.woff)format("woff"),url(/assets/KaTeX_Fraktur-Regular-CB_wures.ttf)format("truetype")}@font-face{font-display:block;font-family:KaTeX_Main;font-style:normal;font-weight:700;src:url(/assets/KaTeX_Main-Bold-Cx986IdX.woff2)format("woff2"),url(/assets/KaTeX_Main-Bold-Jm3AIy58.woff)format("woff"),url(/assets/KaTeX_Main-Bold-waoOVXN0.ttf)format("truetype")}@font-face{font-display:block;font-family:KaTeX_Main;font-style:italic;font-weight:700;src:url(/assets/KaTeX_Main-BoldItalic-DxDJ3AOS.woff2)format("woff2"),url(/assets/KaTeX_Main-BoldItalic-SpSLRI95.woff)format("woff"),url(/assets/KaTeX_Main-BoldItalic-DzxPMmG6.ttf)format("truetype")}@font-face{font-display:block;font-family:KaTeX_Main;font-style:italic;font-weight:400;src:url(/assets/KaTeX_Main-Italic-NWA7e6Wa.woff2)format("woff2"),url(/assets/KaTeX_Main-Italic-BMLOBm91.woff)format("woff"),url(/assets/KaTeX_Main-Italic-3WenGoN9.ttf)format("truetype")}@font-face{font-display:block;font-family:KaTeX_Main;font-style:normal;font-weight:400;src:url(/assets/KaTeX_Main-Regular-B22Nviop.woff2)format("woff2"),url(/assets/KaTeX_Main-Regular-Dr94JaBh.woff)format("woff"),url(/assets/KaTeX_Main-Regular-ypZvNtVU.ttf)format("truetype")}@font-face{font-display:block;font-family:KaTeX_Math;font-style:italic;font-weight:700;src:url(/assets/KaTeX_Math-BoldItalic-CZnvNsCZ.woff2)format("woff2"),url(/assets/KaTeX_Math-BoldItalic-iY-2wyZ7.woff)format("woff"),url(/assets/KaTeX_Math-BoldItalic-B3XSjfu4.ttf)format("truetype")}@font-face{font-display:block;font-family:KaTeX_Math;font-style:italic;font-weight:400;src:url(/assets/KaTeX_Math-Italic-t53AETM-.woff2)format("woff2"),url(/assets/KaTeX_Math-Italic-DA0__PXp.woff)format("woff"),url(/assets/KaTeX_Math-Italic-flOr_0UB.ttf)format("truetype")}@font-face{font-display:block;font-family:KaTeX_SansSerif;font-style:normal;font-weight:700;src:url(/assets/KaTeX_SansSerif-Bold-D1sUS0GD.woff2)format("woff2"),url(/assets/KaTeX_SansSerif-Bold-DbIhKOiC.woff)format("woff"),url(/assets/KaTeX_SansSerif-Bold-CFMepnvq.ttf)format("truetype")}@font-face{font-display:block;font-family:KaTeX_SansSerif;font-style:italic;font-weight:400;src:url(/assets/KaTeX_SansSerif-Italic-C3H0VqGB.woff2)format("woff2"),url(/assets/KaTeX_SansSerif-Italic-DN2j7dab.woff)format("woff"),url(/assets/KaTeX_SansSerif-Italic-YYjJ1zSn.ttf)format("truetype")}@font-face{font-display:block;font-family:KaTeX_SansSerif;font-style:normal;font-weight:400;src:url(/assets/KaTeX_SansSerif-Regular-DDBCnlJ7.woff2)format("woff2"),url(/assets/KaTeX_SansSerif-Regular-CS6fqUqJ.woff)format("woff"),url(/assets/KaTeX_SansSerif-Regular-BNo7hRIc.ttf)format("truetype")}@font-face{font-display:block;font-family:KaTeX_Script;font-style:normal;font-weight:400;src:url(/assets/KaTeX_Script-Regular-D3wIWfF6.woff2)format("woff2"),url(/assets/KaTeX_Script-Regular-D5yQViql.woff)format("woff"),url(/assets/KaTeX_Script-Regular-C5JkGWo-.ttf)format("truetype")}@font-face{font-display:block;font-family:KaTeX_Size1;font-style:normal;font-weight:400;src:url(/assets/KaTeX_Size1-Regular-mCD8mA8B.woff2)format("woff2"),url(/assets/KaTeX_Size1-Regular-C195tn64.woff)format("woff"),url(/assets/KaTeX_Size1-Regular-Dbsnue_I.ttf)format("truetype")}@font-face{font-display:block;font-family:KaTeX_Size2;font-style:normal;font-weight:400;src:url(/assets/KaTeX_Size2-Regular-Dy4dx90m.woff2)format("woff2"),url(/assets/KaTeX_Size2-Regular-oD1tc_U0.woff)format("woff"),url(/assets/KaTeX_Size2-Regular-B7gKUWhC.ttf)format("truetype")}@font-face{font-display:block;font-family:KaTeX_Size3;font-style:normal;font-weight:400;src:url(data:font/woff2;base64,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)format("woff2"),url(/assets/KaTeX_Size3-Regular-CTq5MqoE.woff)format("woff"),url(/assets/KaTeX_Size3-Regular-DgpXs0kz.ttf)format("truetype")}@font-face{font-display:block;font-family:KaTeX_Size4;font-style:normal;font-weight:400;src:url(/assets/KaTeX_Size4-Regular-Dl5lxZxV.woff2)format("woff2"),url(/assets/KaTeX_Size4-Regular-BF-4gkZK.woff)format("woff"),url(/assets/KaTeX_Size4-Regular-DWFBv043.ttf)format("truetype")}@font-face{font-display:block;font-family:KaTeX_Typewriter;font-style:normal;font-weight:400;src:url(/assets/KaTeX_Typewriter-Regular-CO6r4hn1.woff2)format("woff2"),url(/assets/KaTeX_Typewriter-Regular-C0xS9mPB.woff)format("woff"),url(/assets/KaTeX_Typewriter-Regular-D3Ib7_Hf.ttf)format("truetype")}.katex{text-indent:0;text-rendering:auto;font:1.21em/1.2 KaTeX_Main,Times New Roman,serif;position:relative}.katex *{border-color:currentColor;-ms-high-contrast-adjust:none!important}.katex .katex-version:after{content:"0.16.47"}.katex .katex-mathml{clip-path:inset(50%);border:0;width:1px;height:1px;padding:0;position:absolute;overflow:hidden}.katex .katex-html>.newline{display:block}.katex .base{white-space:nowrap;width:min-content;position:relative}.katex .base,.katex .strut{display:inline-block}.katex .textbf{font-weight:700}.katex .textit{font-style:italic}.katex .textrm{font-family:KaTeX_Main}.katex .textsf{font-family:KaTeX_SansSerif}.katex .texttt{font-family:KaTeX_Typewriter}.katex .mathnormal{font-family:KaTeX_Math;font-style:italic}.katex .mathit{font-family:KaTeX_Main;font-style:italic}.katex .mathrm{font-style:normal}.katex .mathbf{font-family:KaTeX_Main;font-weight:700}.katex .boldsymbol{font-family:KaTeX_Math;font-style:italic;font-weight:700}.katex .amsrm,.katex .mathbb,.katex .textbb{font-family:KaTeX_AMS}.katex .mathcal{font-family:KaTeX_Caligraphic}.katex .mathfrak,.katex .textfrak{font-family:KaTeX_Fraktur}.katex .mathboldfrak,.katex .textboldfrak{font-family:KaTeX_Fraktur;font-weight:700}.katex .mathtt{font-family:KaTeX_Typewriter}.katex .mathscr,.katex .textscr{font-family:KaTeX_Script}.katex .mathsf,.katex .textsf{font-family:KaTeX_SansSerif}.katex .mathboldsf,.katex .textboldsf{font-family:KaTeX_SansSerif;font-weight:700}.katex .mathitsf,.katex .mathsfit,.katex .textitsf{font-family:KaTeX_SansSerif;font-style:italic}.katex .mainrm{font-family:KaTeX_Main;font-style:normal}.katex .vlist-t{border-collapse:collapse;table-layout:fixed;display:inline-table}.katex .vlist-r{display:table-row}.katex .vlist{vertical-align:bottom;display:table-cell;position:relative}.katex .vlist>span{height:0;display:block;position:relative}.katex .vlist>span>span{display:inline-block}.katex .vlist>span>.pstrut{width:0;overflow:hidden}.katex .vlist-t2{margin-right:-2px}.katex .vlist-s{vertical-align:bottom;width:2px;min-width:2px;font-size:1px;display:table-cell}.katex .vbox{flex-direction:column;align-items:baseline;display:inline-flex}.katex .hbox{width:100%}.katex .hbox,.katex .thinbox{flex-direction:row;display:inline-flex}.katex .thinbox{width:0;max-width:0}.katex .msupsub{text-align:left}.katex .mfrac>span>span{text-align:center}.katex .mfrac .frac-line{border-bottom-style:solid;width:100%;display:inline-block}.katex .hdashline,.katex .hline,.katex .mfrac .frac-line,.katex .overline .overline-line,.katex .rule,.katex .underline .underline-line{min-height:1px}.katex .mspace{display:inline-block}.katex .smash{line-height:0;display:inline}.katex .clap,.katex .llap,.katex .rlap{width:0;position:relative}.katex .clap>.inner,.katex .llap>.inner,.katex .rlap>.inner{position:absolute}.katex .clap>.fix,.katex .llap>.fix,.katex .rlap>.fix{display:inline-block}.katex .llap>.inner{right:0}.katex .clap>.inner,.katex .rlap>.inner{left:0}.katex .clap>.inner>span{margin-left:-50%;margin-right:50%}.katex .rule{border:0 solid;display:inline-block;position:relative}.katex .hline,.katex .overline .overline-line,.katex .underline .underline-line{border-bottom-style:solid;width:100%;display:inline-block}.katex .hdashline{border-bottom-style:dashed;width:100%;display:inline-block}.katex .sqrt>.root{margin-left:.277778em;margin-right:-.555556em}.katex .fontsize-ensurer.reset-size1.size1,.katex .sizing.reset-size1.size1{font-size:1em}.katex .fontsize-ensurer.reset-size1.size2,.katex .sizing.reset-size1.size2{font-size:1.2em}.katex .fontsize-ensurer.reset-size1.size3,.katex .sizing.reset-size1.size3{font-size:1.4em}.katex .fontsize-ensurer.reset-size1.size4,.katex .sizing.reset-size1.size4{font-size:1.6em}.katex .fontsize-ensurer.reset-size1.size5,.katex .sizing.reset-size1.size5{font-size:1.8em}.katex .fontsize-ensurer.reset-size1.size6,.katex .sizing.reset-size1.size6{font-size:2em}.katex .fontsize-ensurer.reset-size1.size7,.katex .sizing.reset-size1.size7{font-size:2.4em}.katex .fontsize-ensurer.reset-size1.size8,.katex .sizing.reset-size1.size8{font-size:2.88em}.katex .fontsize-ensurer.reset-size1.size9,.katex .sizing.reset-size1.size9{font-size:3.456em}.katex .fontsize-ensurer.reset-size1.size10,.katex .sizing.reset-size1.size10{font-size:4.148em}.katex .fontsize-ensurer.reset-size1.size11,.katex .sizing.reset-size1.size11{font-size:4.976em}.katex .fontsize-ensurer.reset-size2.size1,.katex .sizing.reset-size2.size1{font-size:.833333em}.katex .fontsize-ensurer.reset-size2.size2,.katex .sizing.reset-size2.size2{font-size:1em}.katex .fontsize-ensurer.reset-size2.size3,.katex .sizing.reset-size2.size3{font-size:1.16667em}.katex .fontsize-ensurer.reset-size2.size4,.katex .sizing.reset-size2.size4{font-size:1.33333em}.katex .fontsize-ensurer.reset-size2.size5,.katex .sizing.reset-size2.size5{font-size:1.5em}.katex .fontsize-ensurer.reset-size2.size6,.katex .sizing.reset-size2.size6{font-size:1.66667em}.katex .fontsize-ensurer.reset-size2.size7,.katex .sizing.reset-size2.size7{font-size:2em}.katex .fontsize-ensurer.reset-size2.size8,.katex .sizing.reset-size2.size8{font-size:2.4em}.katex .fontsize-ensurer.reset-size2.size9,.katex .sizing.reset-size2.size9{font-size:2.88em}.katex .fontsize-ensurer.reset-size2.size10,.katex .sizing.reset-size2.size10{font-size:3.45667em}.katex .fontsize-ensurer.reset-size2.size11,.katex .sizing.reset-size2.size11{font-size:4.14667em}.katex .fontsize-ensurer.reset-size3.size1,.katex .sizing.reset-size3.size1{font-size:.714286em}.katex .fontsize-ensurer.reset-size3.size2,.katex .sizing.reset-size3.size2{font-size:.857143em}.katex .fontsize-ensurer.reset-size3.size3,.katex .sizing.reset-size3.size3{font-size:1em}.katex .fontsize-ensurer.reset-size3.size4,.katex .sizing.reset-size3.size4{font-size:1.14286em}.katex .fontsize-ensurer.reset-size3.size5,.katex .sizing.reset-size3.size5{font-size:1.28571em}.katex .fontsize-ensurer.reset-size3.size6,.katex .sizing.reset-size3.size6{font-size:1.42857em}.katex .fontsize-ensurer.reset-size3.size7,.katex .sizing.reset-size3.size7{font-size:1.71429em}.katex .fontsize-ensurer.reset-size3.size8,.katex .sizing.reset-size3.size8{font-size:2.05714em}.katex .fontsize-ensurer.reset-size3.size9,.katex .sizing.reset-size3.size9{font-size:2.46857em}.katex .fontsize-ensurer.reset-size3.size10,.katex .sizing.reset-size3.size10{font-size:2.96286em}.katex .fontsize-ensurer.reset-size3.size11,.katex .sizing.reset-size3.size11{font-size:3.55429em}.katex .fontsize-ensurer.reset-size4.size1,.katex .sizing.reset-size4.size1{font-size:.625em}.katex .fontsize-ensurer.reset-size4.size2,.katex .sizing.reset-size4.size2{font-size:.75em}.katex .fontsize-ensurer.reset-size4.size3,.katex .sizing.reset-size4.size3{font-size:.875em}.katex .fontsize-ensurer.reset-size4.size4,.katex .sizing.reset-size4.size4{font-size:1em}.katex .fontsize-ensurer.reset-size4.size5,.katex .sizing.reset-size4.size5{font-size:1.125em}.katex .fontsize-ensurer.reset-size4.size6,.katex .sizing.reset-size4.size6{font-size:1.25em}.katex .fontsize-ensurer.reset-size4.size7,.katex .sizing.reset-size4.size7{font-size:1.5em}.katex .fontsize-ensurer.reset-size4.size8,.katex .sizing.reset-size4.size8{font-size:1.8em}.katex .fontsize-ensurer.reset-size4.size9,.katex .sizing.reset-size4.size9{font-size:2.16em}.katex .fontsize-ensurer.reset-size4.size10,.katex .sizing.reset-size4.size10{font-size:2.5925em}.katex .fontsize-ensurer.reset-size4.size11,.katex .sizing.reset-size4.size11{font-size:3.11em}.katex .fontsize-ensurer.reset-size5.size1,.katex .sizing.reset-size5.size1{font-size:.555556em}.katex .fontsize-ensurer.reset-size5.size2,.katex .sizing.reset-size5.size2{font-size:.666667em}.katex .fontsize-ensurer.reset-size5.size3,.katex .sizing.reset-size5.size3{font-size:.777778em}.katex .fontsize-ensurer.reset-size5.size4,.katex .sizing.reset-size5.size4{font-size:.888889em}.katex .fontsize-ensurer.reset-size5.size5,.katex .sizing.reset-size5.size5{font-size:1em}.katex .fontsize-ensurer.reset-size5.size6,.katex .sizing.reset-size5.size6{font-size:1.11111em}.katex .fontsize-ensurer.reset-size5.size7,.katex .sizing.reset-size5.size7{font-size:1.33333em}.katex .fontsize-ensurer.reset-size5.size8,.katex .sizing.reset-size5.size8{font-size:1.6em}.katex .fontsize-ensurer.reset-size5.size9,.katex .sizing.reset-size5.size9{font-size:1.92em}.katex .fontsize-ensurer.reset-size5.size10,.katex .sizing.reset-size5.size10{font-size:2.30444em}.katex .fontsize-ensurer.reset-size5.size11,.katex .sizing.reset-size5.size11{font-size:2.76444em}.katex .fontsize-ensurer.reset-size6.size1,.katex .sizing.reset-size6.size1{font-size:.5em}.katex .fontsize-ensurer.reset-size6.size2,.katex .sizing.reset-size6.size2{font-size:.6em}.katex .fontsize-ensurer.reset-size6.size3,.katex .sizing.reset-size6.size3{font-size:.7em}.katex .fontsize-ensurer.reset-size6.size4,.katex .sizing.reset-size6.size4{font-size:.8em}.katex .fontsize-ensurer.reset-size6.size5,.katex .sizing.reset-size6.size5{font-size:.9em}.katex .fontsize-ensurer.reset-size6.size6,.katex .sizing.reset-size6.size6{font-size:1em}.katex .fontsize-ensurer.reset-size6.size7,.katex .sizing.reset-size6.size7{font-size:1.2em}.katex .fontsize-ensurer.reset-size6.size8,.katex .sizing.reset-size6.size8{font-size:1.44em}.katex .fontsize-ensurer.reset-size6.size9,.katex .sizing.reset-size6.size9{font-size:1.728em}.katex .fontsize-ensurer.reset-size6.size10,.katex .sizing.reset-size6.size10{font-size:2.074em}.katex .fontsize-ensurer.reset-size6.size11,.katex .sizing.reset-size6.size11{font-size:2.488em}.katex .fontsize-ensurer.reset-size7.size1,.katex .sizing.reset-size7.size1{font-size:.416667em}.katex .fontsize-ensurer.reset-size7.size2,.katex .sizing.reset-size7.size2{font-size:.5em}.katex .fontsize-ensurer.reset-size7.size3,.katex .sizing.reset-size7.size3{font-size:.583333em}.katex .fontsize-ensurer.reset-size7.size4,.katex .sizing.reset-size7.size4{font-size:.666667em}.katex .fontsize-ensurer.reset-size7.size5,.katex .sizing.reset-size7.size5{font-size:.75em}.katex .fontsize-ensurer.reset-size7.size6,.katex .sizing.reset-size7.size6{font-size:.833333em}.katex .fontsize-ensurer.reset-size7.size7,.katex .sizing.reset-size7.size7{font-size:1em}.katex .fontsize-ensurer.reset-size7.size8,.katex .sizing.reset-size7.size8{font-size:1.2em}.katex .fontsize-ensurer.reset-size7.size9,.katex .sizing.reset-size7.size9{font-size:1.44em}.katex .fontsize-ensurer.reset-size7.size10,.katex .sizing.reset-size7.size10{font-size:1.72833em}.katex .fontsize-ensurer.reset-size7.size11,.katex .sizing.reset-size7.size11{font-size:2.07333em}.katex .fontsize-ensurer.reset-size8.size1,.katex .sizing.reset-size8.size1{font-size:.347222em}.katex .fontsize-ensurer.reset-size8.size2,.katex .sizing.reset-size8.size2{font-size:.416667em}.katex .fontsize-ensurer.reset-size8.size3,.katex .sizing.reset-size8.size3{font-size:.486111em}.katex .fontsize-ensurer.reset-size8.size4,.katex .sizing.reset-size8.size4{font-size:.555556em}.katex .fontsize-ensurer.reset-size8.size5,.katex .sizing.reset-size8.size5{font-size:.625em}.katex .fontsize-ensurer.reset-size8.size6,.katex .sizing.reset-size8.size6{font-size:.694444em}.katex .fontsize-ensurer.reset-size8.size7,.katex .sizing.reset-size8.size7{font-size:.833333em}.katex .fontsize-ensurer.reset-size8.size8,.katex .sizing.reset-size8.size8{font-size:1em}.katex .fontsize-ensurer.reset-size8.size9,.katex .sizing.reset-size8.size9{font-size:1.2em}.katex .fontsize-ensurer.reset-size8.size10,.katex .sizing.reset-size8.size10{font-size:1.44028em}.katex .fontsize-ensurer.reset-size8.size11,.katex .sizing.reset-size8.size11{font-size:1.72778em}.katex .fontsize-ensurer.reset-size9.size1,.katex .sizing.reset-size9.size1{font-size:.289352em}.katex .fontsize-ensurer.reset-size9.size2,.katex .sizing.reset-size9.size2{font-size:.347222em}.katex .fontsize-ensurer.reset-size9.size3,.katex .sizing.reset-size9.size3{font-size:.405093em}.katex .fontsize-ensurer.reset-size9.size4,.katex .sizing.reset-size9.size4{font-size:.462963em}.katex .fontsize-ensurer.reset-size9.size5,.katex .sizing.reset-size9.size5{font-size:.520833em}.katex .fontsize-ensurer.reset-size9.size6,.katex .sizing.reset-size9.size6{font-size:.578704em}.katex .fontsize-ensurer.reset-size9.size7,.katex .sizing.reset-size9.size7{font-size:.694444em}.katex .fontsize-ensurer.reset-size9.size8,.katex .sizing.reset-size9.size8{font-size:.833333em}.katex .fontsize-ensurer.reset-size9.size9,.katex .sizing.reset-size9.size9{font-size:1em}.katex .fontsize-ensurer.reset-size9.size10,.katex .sizing.reset-size9.size10{font-size:1.20023em}.katex .fontsize-ensurer.reset-size9.size11,.katex .sizing.reset-size9.size11{font-size:1.43981em}.katex .fontsize-ensurer.reset-size10.size1,.katex .sizing.reset-size10.size1{font-size:.24108em}.katex .fontsize-ensurer.reset-size10.size2,.katex .sizing.reset-size10.size2{font-size:.289296em}.katex .fontsize-ensurer.reset-size10.size3,.katex .sizing.reset-size10.size3{font-size:.337512em}.katex .fontsize-ensurer.reset-size10.size4,.katex .sizing.reset-size10.size4{font-size:.385728em}.katex .fontsize-ensurer.reset-size10.size5,.katex .sizing.reset-size10.size5{font-size:.433944em}.katex .fontsize-ensurer.reset-size10.size6,.katex .sizing.reset-size10.size6{font-size:.48216em}.katex .fontsize-ensurer.reset-size10.size7,.katex .sizing.reset-size10.size7{font-size:.578592em}.katex .fontsize-ensurer.reset-size10.size8,.katex .sizing.reset-size10.size8{font-size:.694311em}.katex .fontsize-ensurer.reset-size10.size9,.katex .sizing.reset-size10.size9{font-size:.833173em}.katex .fontsize-ensurer.reset-size10.size10,.katex .sizing.reset-size10.size10{font-size:1em}.katex .fontsize-ensurer.reset-size10.size11,.katex .sizing.reset-size10.size11{font-size:1.19961em}.katex .fontsize-ensurer.reset-size11.size1,.katex .sizing.reset-size11.size1{font-size:.200965em}.katex .fontsize-ensurer.reset-size11.size2,.katex .sizing.reset-size11.size2{font-size:.241158em}.katex .fontsize-ensurer.reset-size11.size3,.katex .sizing.reset-size11.size3{font-size:.281351em}.katex .fontsize-ensurer.reset-size11.size4,.katex .sizing.reset-size11.size4{font-size:.321543em}.katex .fontsize-ensurer.reset-size11.size5,.katex .sizing.reset-size11.size5{font-size:.361736em}.katex .fontsize-ensurer.reset-size11.size6,.katex .sizing.reset-size11.size6{font-size:.401929em}.katex .fontsize-ensurer.reset-size11.size7,.katex .sizing.reset-size11.size7{font-size:.482315em}.katex .fontsize-ensurer.reset-size11.size8,.katex .sizing.reset-size11.size8{font-size:.578778em}.katex .fontsize-ensurer.reset-size11.size9,.katex .sizing.reset-size11.size9{font-size:.694534em}.katex .fontsize-ensurer.reset-size11.size10,.katex .sizing.reset-size11.size10{font-size:.833601em}.katex .fontsize-ensurer.reset-size11.size11,.katex .sizing.reset-size11.size11{font-size:1em}.katex .delimsizing.size1{font-family:KaTeX_Size1}.katex .delimsizing.size2{font-family:KaTeX_Size2}.katex .delimsizing.size3{font-family:KaTeX_Size3}.katex .delimsizing.size4{font-family:KaTeX_Size4}.katex .delimsizing.mult .delim-size1>span{font-family:KaTeX_Size1}.katex .delimsizing.mult .delim-size4>span{font-family:KaTeX_Size4}.katex .nulldelimiter{width:.12em;display:inline-block}.katex .delimcenter,.katex .op-symbol{position:relative}.katex .op-symbol.small-op{font-family:KaTeX_Size1}.katex .op-symbol.large-op{font-family:KaTeX_Size2}.katex .accent>.vlist-t,.katex .op-limits>.vlist-t{text-align:center}.katex .accent .accent-body{position:relative}.katex .accent .accent-body:not(.accent-full){width:0}.katex .overlay{display:block}.katex .mtable .vertical-separator{min-width:1px;display:inline-block}.katex .mtable .arraycolsep{display:inline-block}.katex .mtable .col-align-c>.vlist-t{text-align:center}.katex .mtable .col-align-l>.vlist-t{text-align:left}.katex .mtable .col-align-r>.vlist-t{text-align:right}.katex .svg-align{text-align:left}.katex svg{fill:currentColor;stroke:currentColor;height:inherit;width:100%;display:block;position:absolute}.katex svg path{stroke:none}.katex svg{fill-rule:nonzero;fill-opacity:1;stroke-width:1px;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-dasharray:none;stroke-dashoffset:0;stroke-opacity:1}.katex img{border-style:none;min-width:0;max-width:none;min-height:0;max-height:none}.katex .stretchy{width:100%;display:block;position:relative;overflow:hidden}.katex .stretchy:after,.katex .stretchy:before{content:""}.katex .hide-tail{width:100%;position:relative;overflow:hidden}.katex .halfarrow-left{width:50.2%;position:absolute;left:0;overflow:hidden}.katex .halfarrow-right{width:50.2%;position:absolute;right:0;overflow:hidden}.katex .brace-left{width:25.1%;position:absolute;left:0;overflow:hidden}.katex .brace-center{width:50%;position:absolute;left:25%;overflow:hidden}.katex .brace-right{width:25.1%;position:absolute;right:0;overflow:hidden}.katex .x-arrow-pad{padding:0 .5em}.katex .cd-arrow-pad{padding:0 .55556em 0 .27778em}.katex .mover,.katex .munder,.katex .x-arrow{text-align:center}.katex .boxpad{padding:0 .3em}.katex .fbox,.katex .fcolorbox{box-sizing:border-box;border:.04em solid}.katex .cancel-pad{padding:0 .2em}.katex .cancel-lap{margin-left:-.2em;margin-right:-.2em}.katex .sout{border-bottom-style:solid;border-bottom-width:.08em}.katex .angl{box-sizing:border-box;border-top:.049em solid;border-right:.049em solid;margin-right:.03889em}.katex .anglpad{padding:0 .03889em}.katex .eqn-num:before{content:"(" counter(katexEqnNo) ")";counter-increment:katexEqnNo}.katex .mml-eqn-num:before{content:"(" counter(mmlEqnNo) ")";counter-increment:mmlEqnNo}.katex .mtr-glue{width:50%}.katex .cd-vert-arrow{display:inline-block;position:relative}.katex .cd-label-left{text-align:left;display:inline-block;position:absolute;right:calc(50% + .3em)}.katex .cd-label-right{text-align:right;display:inline-block;position:absolute;left:calc(50% + .3em)}.katex-display{text-align:center;margin:1em 0;display:block}.katex-display>.katex{text-align:center;white-space:nowrap;display:block}.katex-display>.katex>.katex-html{display:block;position:relative}.katex-display>.katex>.katex-html>.tag{position:absolute;right:0}.katex-display.leqno>.katex>.katex-html>.tag{left:0;right:auto}.katex-display.fleqn>.katex{text-align:left;padding-left:2em}body{counter-reset:katexEqnNo mmlEqnNo}