/*! tailwindcss v4.2.1 | MIT License | https://tailwindcss.com */
@layer theme{:root,:host{--font-sans:ui-sans-serif, system-ui, sans-serif, "Apple Color Emoji", "Segoe UI Emoji", "Segoe UI Symbol", "Noto Color Emoji";--font-mono:ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;--spacing:.25rem;--default-font-family:var(--font-sans);--default-mono-font-family:var(--font-mono)}}@layer base{*,:after,:before,::backdrop{box-sizing:border-box;border:0 solid;margin:0;padding:0}::file-selector-button{box-sizing:border-box;border:0 solid;margin:0;padding:0}html,:host{-webkit-text-size-adjust:100%;tab-size:4;line-height:1.5;font-family:var(--default-font-family,ui-sans-serif, system-ui, sans-serif, "Apple Color Emoji", "Segoe UI Emoji", "Segoe UI Symbol", "Noto Color Emoji");font-feature-settings:var(--default-font-feature-settings,normal);font-variation-settings:var(--default-font-variation-settings,normal);-webkit-tap-highlight-color:transparent}hr{height:0;color:inherit;border-top-width:1px}abbr:where([title]){-webkit-text-decoration:underline dotted;text-decoration:underline dotted}h1,h2,h3,h4,h5,h6{font-size:inherit;font-weight:inherit}a{color:inherit;-webkit-text-decoration:inherit;-webkit-text-decoration:inherit;-webkit-text-decoration:inherit;-webkit-text-decoration:inherit;text-decoration:inherit}b,strong{font-weight:bolder}code,kbd,samp,pre{font-family:var(--default-mono-font-family,ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace);font-feature-settings:var(--default-mono-font-feature-settings,normal);font-variation-settings:var(--default-mono-font-variation-settings,normal);font-size:1em}small{font-size:80%}sub,sup{vertical-align:baseline;font-size:75%;line-height:0;position:relative}sub{bottom:-.25em}sup{top:-.5em}table{text-indent:0;border-color:inherit;border-collapse:collapse}:-moz-focusring{outline:auto}progress{vertical-align:baseline}summary{display:list-item}ol,ul,menu{list-style:none}img,svg,video,canvas,audio,iframe,embed,object{vertical-align:middle;display:block}img,video{max-width:100%;height:auto}button,input,select,optgroup,textarea{font:inherit;font-feature-settings:inherit;font-variation-settings:inherit;letter-spacing:inherit;color:inherit;opacity:1;background-color:#0000;border-radius:0}::file-selector-button{font:inherit;font-feature-settings:inherit;font-variation-settings:inherit;letter-spacing:inherit;color:inherit;opacity:1;background-color:#0000;border-radius:0}:where(select:is([multiple],[size])) optgroup{font-weight:bolder}:where(select:is([multiple],[size])) optgroup option{padding-inline-start:20px}::file-selector-button{margin-inline-end:4px}::placeholder{opacity:1}@supports (not ((-webkit-appearance:-apple-pay-button))) or (contain-intrinsic-size:1px){::placeholder{color:currentColor}@supports (color:color-mix(in lab, red, red)){::placeholder{color:color-mix(in oklab, currentcolor 50%, transparent)}}}textarea{resize:vertical}::-webkit-search-decoration{-webkit-appearance:none}::-webkit-date-and-time-value{min-height:1lh;text-align:inherit}::-webkit-datetime-edit{display:inline-flex}::-webkit-datetime-edit-fields-wrapper{padding:0}::-webkit-datetime-edit{padding-block:0}::-webkit-datetime-edit-year-field{padding-block:0}::-webkit-datetime-edit-month-field{padding-block:0}::-webkit-datetime-edit-day-field{padding-block:0}::-webkit-datetime-edit-hour-field{padding-block:0}::-webkit-datetime-edit-minute-field{padding-block:0}::-webkit-datetime-edit-second-field{padding-block:0}::-webkit-datetime-edit-millisecond-field{padding-block:0}::-webkit-datetime-edit-meridiem-field{padding-block:0}::-webkit-calendar-picker-indicator{line-height:1}:-moz-ui-invalid{box-shadow:none}button,input:where([type=button],[type=reset],[type=submit]){appearance:button}::file-selector-button{appearance:button}::-webkit-inner-spin-button{height:auto}::-webkit-outer-spin-button{height:auto}[hidden]:where(:not([hidden=until-found])){display:none!important}}@layer components;@layer utilities{.static{position:static}.start{inset-inline-start:var(--spacing)}.end{inset-inline-end:var(--spacing)}.flex{display:flex}.grid{display:grid}}:root{--ink:#243e31;--muted:#7a8177;--paper:#f4f1e9;--line:#e2e4db;--green:#345a42;--lime:#d9ecb5;--white:#fffefa}*{box-sizing:border-box}body{background:var(--paper);color:var(--ink);-webkit-font-smoothing:antialiased;margin:0;font-family:Arial,Helvetica,sans-serif;font-size:14px}button,a,input,textarea{-webkit-tap-highlight-color:transparent}button{cursor:pointer;font:inherit}button:disabled{cursor:default;opacity:.5}a{color:inherit}button:focus-visible,a:focus-visible,summary:focus-visible,textarea:focus-visible{outline-offset:3px;outline:3px solid #98b878}button{transition:background .16s,color .16s,transform .16s}button:not(:disabled):active{transform:translateY(1px)}.app-shell{grid-template-columns:255px minmax(0,1fr);min-height:100dvh;display:grid}.sidebar{background:#eeeee4;border-right:1px solid #dfe1d6;flex-direction:column;height:100dvh;padding:32px 20px 22px;display:flex;position:sticky;top:0}.brand{letter-spacing:-.8px;align-items:center;gap:10px;font-size:19px;font-weight:700;line-height:1.05;text-decoration:none;display:flex}.brand-icon{background:var(--green);color:#e1edcf;border-radius:12px 12px 18px 18px;justify-content:center;align-items:center;width:37px;height:42px;display:flex}.brand-light{font-weight:400}.brand small{letter-spacing:2.4px;color:#7c8478;margin-top:7px;font-size:8px;display:block}.class-card{letter-spacing:1.2px;border:1px solid #daddce;border-radius:7px;align-items:center;gap:8px;margin-top:36px;padding:12px 11px;font-size:10px;font-weight:700;display:flex}.class-dot,.status-dot{background:#7ba258;border-radius:50%;flex-shrink:0;width:6px;height:6px;display:inline-block}.class-divider{background:#cbd1c0;width:1px;height:12px;margin:0 8px}.eyebrow{letter-spacing:1.8px;color:#77816f;font-size:9px;font-weight:700}.side-label{margin:29px 10px 13px;font-size:8px}.nav-overview{text-align:left;background:0 0;border:0;border-radius:7px;align-items:center;gap:10px;width:100%;padding:13px 11px;font-size:12px;display:flex}.nav-overview svg:last-child{margin-left:auto}.nav-overview.selected{background:#dce6d1}.topic-list{gap:4px;margin-top:13px;display:grid}.topic{text-align:left;color:#606c5d;background:0 0;border:0;border-radius:7px;align-items:center;gap:10px;padding:13px 9px;font-size:11px;line-height:1.4;display:flex}.topic:hover,.topic.active{color:#294832;background:#e0e6d7}.topic-number{color:#929b89;letter-spacing:.5px;font-size:9px}.topic small{white-space:nowrap;color:#8c9483;margin-left:auto;font-size:9px}.side-bottom{margin-top:auto;padding-top:22px}.exam-note{border-top:1px solid #d9ddcd;gap:10px;padding:17px 5px;display:flex}.exam-note svg{color:#8d997f;flex-shrink:0;margin-top:2px}.exam-note strong{font-size:10px;font-weight:500}.exam-note p{color:#8a907f;margin:6px 0;font-size:10px;line-height:1.8}.text-button{color:#68755e;background:0 0;border:0;align-items:center;gap:8px;padding:13px 4px;font-size:10px;display:flex}.teacher-link{color:#8c9384;margin:8px 4px;font-size:9px;text-decoration:none;display:inline-block}.workspace{min-width:0}.topbar{border-bottom:1px solid var(--line);justify-content:space-between;align-items:center;height:73px;padding:0 40px;display:flex}.breadcrumbs{color:#929786;align-items:center;gap:15px;font-size:11px;display:flex}.breadcrumbs strong{color:var(--ink);font-weight:500}.private-tag{color:#88917e;align-items:center;gap:7px;font-size:9px;display:flex}.body-grid{grid-template-columns:minmax(0,1fr) 278px;gap:40px;max-width:1350px;min-height:calc(100dvh - 120px);margin:auto;padding:32px 40px 0;display:grid}.conversation{flex-direction:column;min-width:0;display:flex}.conversation-heading{justify-content:space-between;align-items:center;margin-bottom:22px;display:flex}.conversation-heading h1{letter-spacing:-1.2px;margin:9px 0 0;font-family:Georgia,Times New Roman,serif;font-size:clamp(24px,2.3vw,34px);font-weight:400;line-height:1.3}.conversation-heading em{font-weight:400}.unit-icon{color:#8b9a7a;border:1px solid #d8dfce;border-radius:50%;flex-shrink:0;justify-content:center;align-items:center;width:49px;height:49px;margin-left:12px;display:flex}.pilot-note{color:#8a846c;background:#f4f1e5;border:1px solid #e1dfcf;border-radius:8px;align-items:flex-start;gap:9px;margin-bottom:12px;padding:10px 12px;font-size:10px;line-height:1.6;display:flex}.pilot-note p{margin:0}.pilot-note strong{font-weight:600}.pilot-note .status-dot{background:#c1aa6d;margin-top:5px}.chat-area{background:var(--white);border:1px solid #e0e4d8;border-radius:15px;flex:1;min-height:400px;padding:28px;overflow:hidden;box-shadow:0 3px 8px #354c2c02}.welcome{max-width:550px;margin:auto}.welcome-art{background:radial-gradient(#eff2e4 0%,#fffefa 70%);height:172px;margin:-7px 0 30px;position:relative}.welcome-art svg{width:100%;height:146px}.welcome-art>span{text-align:center;letter-spacing:2px;color:#9ba489;font-size:7px;position:absolute;bottom:0;left:0;right:0}.assistant-label,.message-label{color:#809075;letter-spacing:1.4px;align-items:center;gap:8px;font-size:8px;font-weight:600;display:flex}.avatar{color:#536c42;background:#e8efdd;border-radius:8px;flex-shrink:0;justify-content:center;align-items:center;width:25px;height:25px;display:inline-flex}.welcome h2{letter-spacing:-.8px;margin:18px 0 12px;font-family:Georgia,serif;font-size:29px;font-weight:400}.welcome>p{color:#7e8776;max-width:390px;margin:0 0 23px;font-size:13px;line-height:1.85}.primary{color:#f6faef;background:#355a42;border:0;border-radius:7px;justify-content:center;align-items:center;gap:25px;padding:14px 20px;font-size:12px;display:inline-flex}.primary:hover{background:#244932}.start-button{box-shadow:0 4px 8px #355a4214}.time-note{color:#9aa18e;letter-spacing:.2px;margin-top:12px;font-size:8px;display:block}.welcome-alternatives{border-top:1px solid #edf0e6;margin-top:30px;padding-top:20px}.welcome-alternatives>span{color:#929a85;font-size:9px}.welcome-alternatives>div{flex-wrap:wrap;gap:8px;margin-top:12px;display:flex}.welcome-alternatives button{color:#67775b;background:0 0;border:1px solid #e1e6d8;border-radius:5px;align-items:center;gap:12px;padding:9px 10px;font-size:9px;display:flex}.welcome-alternatives button:hover{background:#eef3e7}.composer-wrap{background:var(--paper);z-index:5;padding:15px 0 0;position:sticky;bottom:0}.composer-tools{justify-content:space-between;align-items:center;gap:8px;margin:0 2px 10px;display:flex}.mode-switch{gap:3px;display:flex}.mode-switch button{color:#929b86;background:0 0;border:0;border-radius:5px;padding:7px 10px;font-size:10px}.mode-switch button.on{color:#4a6340;background:#e5e9dd}.soon{opacity:.8;margin-left:3px;font-size:7px}.hint-button{color:#7a875f;white-space:nowrap;background:0 0;border:0;align-items:center;gap:5px;font-size:10px;display:flex}.hint-button small{color:#a0a78e;margin-left:3px;font-size:8px}.composer{background:#fffefa;border:1px solid #d4ddc8;border-radius:10px;align-items:center;gap:10px;padding:9px 10px 9px 15px;display:flex;box-shadow:0 2px 4px #33492803}.composer:focus-within{border-color:#8fa279;box-shadow:0 0 0 3px #b9cf9d25}.composer textarea{resize:vertical;width:100%;min-height:28px;max-height:130px;color:var(--ink);background:0 0;border:0;outline:none;padding:4px 0;font-family:inherit;font-size:12px;line-height:1.7;display:block}.composer textarea::placeholder{color:#a0a790}.send{color:#486633;background:#d9ecb5;border:0;border-radius:7px;flex-shrink:0;justify-content:center;align-items:center;width:34px;height:34px;display:flex}.send:hover{background:#cae39c}.privacy-note{color:#9aa18e;margin:9px 5px 0;padding-bottom:10px;font-size:8px;line-height:1.6}.error{color:#8b593a;background:#f5e8dd;border-radius:7px;margin-bottom:10px;padding:10px 12px;font-size:11px;line-height:1.6}.message-list{flex-direction:column;gap:25px;display:flex}.message{max-width:96%}.message.user{align-self:flex-end;max-width:87%}.message.user .message-label{justify-content:flex-end;margin-bottom:8px}.message-label small{letter-spacing:.5px;color:#a9b099;margin-left:auto;font-size:7px;font-weight:400}.bubble{white-space:pre-wrap;overflow-wrap:anywhere;color:#53634c;margin-top:10px;font-size:13px;line-height:1.85}.bubble a{color:#365a3e;text-decoration:underline}.user .bubble{background:#edf2e3;border:1px solid #e6edda;border-radius:10px 10px 2px;margin-top:0;padding:12px 16px;font-size:12px}.answer-actions{gap:8px;display:grid}.answer-actions button{text-align:left;color:#5c7050;background:#fffefa;border:1px solid #dce4d1;border-radius:7px;align-items:center;gap:10px;padding:12px;font-size:12px;line-height:1.5;display:flex}.answer-actions button:hover{background:#f1f6e9;border-color:#a3bb8a}.answer-actions svg{flex-shrink:0;margin-left:auto}.choice-letter{background:#eef2e6;border-radius:5px;justify-content:center;align-items:center;min-width:22px;height:22px;font-size:9px;display:flex}.next-button{align-self:flex-start}.thinking{color:#98a18c;align-items:center;gap:4px;display:flex}.thinking>span{background:#8c9f79;border-radius:50%;width:4px;height:4px;animation:1s infinite pulse}.thinking span:nth-child(2){animation-delay:.15s}.thinking span:nth-child(3){animation-delay:.3s}.thinking small{margin-left:6px;font-size:9px}@keyframes pulse{50%{opacity:.5}}.study-panel{border-left:1px solid #dfe3d6;min-width:0;padding-top:6px;padding-left:27px}.study-top{color:#8b987a;justify-content:space-between;align-items:center;display:flex}.study-top .eyebrow{letter-spacing:1.5px;font-size:8px}.panel-tabs{border-bottom:1px solid #dce2d2;gap:23px;margin-top:24px;display:flex}.panel-tabs button{color:#959e88;background:0 0;border:0;padding:0 1px 12px;font-size:10px}.panel-tabs button.on{color:#425d36;border-bottom:2px solid #668453}.study-panel h3{letter-spacing:-.5px;margin:23px 0 9px;font-family:Georgia,serif;font-size:22px;font-weight:400}.panel-intro{color:#909984;margin:0 0 22px;font-size:11px;line-height:1.9}.formula-list{gap:10px;display:grid}.formula-card{background:#fffefa;border:1px solid #e1e5d7;border-radius:8px;padding:16px 14px;position:relative}.formula-card small{color:#8c967e;margin-bottom:11px;font-size:9px;display:block}.formula-card strong{color:#49603d;letter-spacing:.5px;font-family:Georgia,serif;font-size:25px;font-style:italic;font-weight:400}.formula-index{color:#bdc6b1;font-size:8px;position:absolute;top:13px;right:11px}.units{color:#758369;border-bottom:1px solid #dfe3d5;margin-top:16px;padding-bottom:17px;font-size:10px}.units summary{cursor:pointer;justify-content:space-between;align-items:center;list-style:none;display:flex}.units summary::-webkit-details-marker{display:none}.units dl{margin:18px 0 0;font-size:10px}.units dl>div{gap:12px;margin:9px 0;line-height:1.6;display:flex}.units dt{min-width:14px;font-family:Georgia,serif;font-size:15px}.units dd{color:#87917b;margin:0}.remember{background:#e9eddd;border-radius:8px;gap:10px;margin-top:21px;padding:14px 12px;display:flex}.remember svg{color:#7d925e;flex-shrink:0}.remember strong{font-size:9px;font-weight:500;line-height:1.5}.remember p{color:#8b967b;margin:6px 0 0;font-size:9px;line-height:1.9}.source-card{border-top:1px solid #dfe3d5;margin-top:26px;padding-top:20px}.source-card>.eyebrow{margin-bottom:11px;font-size:7px;display:block}.source-card a{color:#6e805e;margin:10px 0;font-size:10px;text-decoration:none;display:block}.source-card a:hover{text-decoration:underline}.source-card p{color:#a0a78f;font-size:8px;line-height:1.8}.progress-card{background:#e5ecd9;border-radius:8px;padding:20px}.progress-card>strong{font-family:Georgia,serif;font-size:36px;font-weight:400}.progress-card>strong span{color:#a0af8b;font-size:20px}.progress-card p{color:#81946c;font-size:10px;line-height:1.8}.progress-track{background:#d1dcc3;border-radius:4px;height:4px;margin-top:16px;overflow:hidden}.progress-track>span{background:#6b8f4d;height:100%;display:block}.progress-topics{gap:18px;margin:25px 0;display:grid}.progress-topics>div{color:#87957b;align-items:center;gap:9px;font-size:10px;display:flex}.progress-topics>div>span{border:1px solid #cdd7bf;border-radius:50%;justify-content:center;align-items:center;width:16px;height:16px;display:flex}.progress-topics .achieved{color:#5d7e46;background:#d8e7c3}.outline-button{color:#688153;background:0 0;border:1px solid #cfd9c2;border-radius:6px;justify-content:space-between;align-items:center;width:100%;padding:12px;font-size:10px;display:flex}.footer{color:#a8ad9a;justify-content:space-between;gap:10px;max-width:1350px;margin:auto;padding:17px 40px;font-size:8px;display:flex}.footer>span>span{margin:0 9px}.icon-button{color:var(--ink);background:0 0;border:0;justify-content:center;align-items:center;padding:7px;display:flex}.mobile-menu,.close-drawer,.backdrop{display:none}@media (width>=1500px){.body-grid{gap:48px;padding-top:40px}.chat-area{padding:35px}.conversation-heading h1{font-size:36px}}@media (width<=1150px){.app-shell{grid-template-columns:218px minmax(0,1fr)}.sidebar{padding:27px 13px}.brand{font-size:17px}.body-grid{grid-template-columns:minmax(0,1fr) 225px;gap:23px;padding:25px 25px 0}.study-panel{padding-left:18px}.topbar{padding:0 25px}.chat-area{padding:22px}.welcome-alternatives>div{grid-template-columns:1fr;display:grid}.welcome-alternatives button{justify-content:space-between}.conversation-heading h1{font-size:26px}.unit-icon{display:none}.topic{font-size:10px}.footer{padding-left:25px;padding-right:25px}}@media (width<=900px){.body-grid{grid-template-columns:minmax(0,1fr)}.study-panel{border-left:0;border-top:1px solid var(--line);padding:22px 0 15px}.formula-list{grid-template-columns:repeat(4,1fr)}.formula-card{padding:14px 9px}.formula-card strong{font-size:22px}.formula-card small{font-size:8px}.formula-index{display:none}.remember{max-width:400px}.source-card{margin-top:18px}.panel-intro{margin-bottom:15px}.panel-tabs{margin-top:15px}.study-panel h3{margin-top:16px}.conversation{min-height:calc(100dvh - 130px)}.composer-wrap{position:sticky}.private-tag{font-size:8px}.footer{padding-top:5px}.welcome{max-width:550px}.welcome-alternatives>div{display:flex}}@media (width<=620px){.app-shell{display:block}.sidebar{z-index:40;width:280px;height:100dvh;padding:30px 20px;transition:transform .2s;position:fixed;inset:0 auto 0 0;overflow-y:auto;transform:translate(-100%)}.sidebar.open{transform:translate(0)}.close-drawer{display:flex;position:absolute;top:12px;right:12px}.mobile-menu{margin-left:-7px;display:flex}.backdrop{z-index:30;background:#223e3144;border:0;display:block;position:fixed;inset:0}.topbar{height:60px;padding:0 19px}.breadcrumbs{gap:9px;font-size:11px}.private-tag{gap:5px;font-size:8px}.private-tag svg{width:13px}.body-grid{gap:25px;padding:23px 15px 0}.conversation-heading{margin:0 4px 17px}.conversation-heading .eyebrow{letter-spacing:1.2px;font-size:8px}.conversation-heading h1{letter-spacing:-1px;margin-top:8px;font-size:26px}.chat-area{border-radius:12px;min-height:360px;padding:22px 19px}.welcome-art{height:130px;margin-bottom:25px}.welcome-art svg{height:111px}.welcome h2{margin-top:16px;font-size:27px}.welcome>p{font-size:12px;line-height:1.9}.welcome-alternatives{margin-top:25px}.welcome-alternatives>div{grid-template-columns:1fr;display:grid}.welcome-alternatives button{min-height:39px;font-size:10px}.start-button{justify-content:space-between;width:100%;min-height:48px;font-size:12px}.time-note{text-align:center;font-size:8px}.pilot-note{margin-bottom:10px;padding:9px 11px;font-size:9px}.composer-wrap{padding-bottom:env(safe-area-inset-bottom);margin:0 -2px}.composer textarea{min-height:36px;padding-top:7px;font-size:16px;line-height:1.4}.composer{padding:8px 8px 8px 12px}.send{width:38px;height:38px}.privacy-note{margin-top:8px;font-size:8px;line-height:1.6}.bubble{font-size:13px}.message{max-width:100%}.message.user{max-width:94%}.message-label{letter-spacing:1px;font-size:7px}.answer-actions button{min-height:48px;font-size:12px}.formula-list{grid-template-columns:repeat(2,1fr);gap:9px}.formula-card{padding:16px 13px}.formula-card strong{font-size:25px}.formula-card small{font-size:9px}.study-panel{padding:22px 5px 12px}.source-card{padding-top:15px}.source-card a{font-size:11px}.footer{padding:10px 20px 18px}.conversation{min-height:calc(100dvh - 88px)}.hint-button{min-height:37px}.mode-switch button{min-height:36px}.topic{min-height:44px;font-size:12px}.class-card{margin-top:28px}.panel-tabs button{min-height:38px}.next-button{min-height:46px}.study-top .eyebrow{font-size:9px}.units summary{min-height:40px;font-size:11px}.remember strong,.remember p{font-size:10px}.outline-button{min-height:44px}}@media (prefers-reduced-motion:reduce){*{scroll-behavior:auto!important;transition:none!important;animation:none!important}}