:root{--lightningcss-light:initial;--lightningcss-dark: ;color-scheme:light;--learn-canvas:#f4f3ee;--learn-page:#faf9f5;--learn-surface:#fff;--learn-subtle:#f0efe7;--learn-text:#141619;--learn-secondary:#373c47;--learn-tertiary:#58606e;--learn-border:#1416191a;--learn-accent:#3046bc;--learn-accent-soft:#3046bc14;--learn-dock:#faf9f5eb;--learn-shadow:0 4px 20px -2px #12141a14, 0 1px 2px #12141a0a;--home-green:#087f5b;--home-green-soft:#087f5b1a;--home-amber:#b45309;--home-amber-soft:#b453091a;--home-violet:#7054b4;--home-sky:#2f6f9f;--home-shadow-card:0 2px 12px -2px #12141a0a, 0 1px 2px #12141a06}:root[data-theme=dark]{--lightningcss-light: ;--lightningcss-dark:initial;color-scheme:dark;--learn-canvas:#0a0c0f;--learn-page:#101216;--learn-surface:#161920;--learn-subtle:#1c2029;--learn-text:#f1f3f5;--learn-secondary:#b8c0cc;--learn-tertiary:#8c95a4;--learn-border:#ffffff1a;--learn-accent:#748ffc;--learn-accent-soft:#748ffc1f;--learn-dock:#161920eb;--learn-shadow:0 6px 24px -2px #00000080;--home-green:#38d9a9;--home-green-soft:#38d9a924;--home-amber:#fcc419;--home-amber-soft:#fcc41926;--home-violet:#b197fc;--home-sky:#74c0fc;--home-shadow-card:0 4px 18px -2px #00000052}*,:before,:after{box-sizing:border-box}html,body,#home-root{min-height:100%}body.home-page{color:var(--learn-text);font-family:Inter,-apple-system,BlinkMacSystemFont,PingFang SC,Hiragino Sans GB,Microsoft YaHei,sans-serif;transition:background-color .2s,color .2s;overflow-x:hidden;background:var(--learn-page)!important;background-image:none!important}body.home-page:before,body.home-page:after{display:none!important}.home-app{min-height:100vh;color:var(--learn-text);background:var(--learn-page)}.home-app button,.home-app textarea{font:inherit}.home-app a{color:inherit;text-shadow:none;text-decoration:none}.home-app a:hover{color:var(--learn-accent);text-shadow:none}.home-app button:focus-visible,.home-app a:focus-visible,.home-app textarea:focus-visible{outline:2px solid var(--learn-accent);outline-offset:3px}.sr-only{clip:rect(0, 0, 0, 0);white-space:nowrap;border:0;width:1px;height:1px;margin:-1px;padding:0;position:absolute;overflow:hidden}.home-header{z-index:40;pointer-events:none;padding:10px 16px 0;position:sticky;top:10px}.home-dock{border:1px solid var(--learn-border);background:var(--learn-dock);width:min(100%,1100px);min-height:58px;box-shadow:var(--learn-shadow);-webkit-backdrop-filter:blur(18px)saturate(150%);pointer-events:auto;border-radius:999px;justify-content:space-between;align-items:center;gap:14px;margin:0 auto;padding:8px 12px 8px 17px;display:flex;position:relative}.home-brand{letter-spacing:-.025em;flex:none;align-items:center;gap:8px;font-size:14px;font-weight:650;display:inline-flex;color:var(--learn-text)!important}.home-brand-mark{background:var(--learn-accent);color:#fff;border-radius:50%;place-items:center;width:25px;height:25px;font-family:Georgia,serif;font-size:17px;display:grid}.home-nav-links{align-items:center;gap:3px;min-width:0;display:flex}.home-nav-links a{color:var(--learn-secondary);white-space:nowrap;border-radius:999px;padding:7px 10px;font-size:12px}.home-nav-links a:hover,.home-nav-links a.is-active{background:var(--learn-accent-soft);color:var(--learn-accent)}.home-account{color:var(--learn-secondary);flex:none;align-items:center;gap:8px;display:flex}.home-user-name{max-width:110px;color:var(--learn-secondary);text-overflow:ellipsis;white-space:nowrap;font-size:12px;overflow:hidden}.home-login,.home-quiet-button{border:1px solid var(--learn-border);color:var(--learn-secondary);background:0 0;border-radius:999px;padding:6px 10px;font-size:12px}.home-quiet-button,.home-theme-toggle,.home-menu-toggle{cursor:pointer}.home-theme-toggle,.home-menu-toggle{width:31px;height:31px;color:var(--learn-secondary);background:0 0;border:0;border-radius:50%;place-items:center;font-size:17px;display:grid}.home-theme-toggle:hover,.home-menu-toggle:hover{background:var(--learn-subtle)}.home-menu-toggle{display:none}.home-content{width:min(100% - 40px,1120px);margin:0 auto;padding:46px 0 64px}.home-hero-grid{grid-template-columns:minmax(0,1.12fr) minmax(330px,.88fr);align-items:center;gap:clamp(24px,5vw,64px);padding:26px 0 34px;display:grid}.home-learning-lead{padding:18px 0 18px 4px}.home-eyebrow{color:var(--learn-tertiary);letter-spacing:.13em;text-transform:uppercase;align-items:center;gap:8px;font-size:10px;font-weight:650;display:inline-flex}.home-eyebrow-dot{background:var(--home-green);border-radius:50%;width:6px;height:6px}.home-learning-lead h1{color:var(--learn-text);letter-spacing:-.055em;margin:20px 0 15px;font-family:Noto Serif SC,Georgia,serif;font-size:clamp(34px,4.4vw,52px);font-weight:500;line-height:1.35}.home-learning-lead h1 em{color:var(--learn-accent);font-style:normal}.home-lead-copy{max-width:490px;color:var(--learn-secondary);margin:0;font-size:15px;line-height:1.85}.home-course-path{color:var(--learn-tertiary);flex-wrap:wrap;align-items:center;gap:8px;margin:22px 0 20px;font-size:11px;display:flex}.home-course-path b{color:var(--learn-secondary);font-weight:550}.home-course-path i{color:var(--learn-tertiary);font-style:normal}.home-course-path small{border:1px solid var(--learn-border);color:var(--learn-tertiary);border-radius:999px;padding:3px 7px;font-size:10px}.home-primary-button{border:1px solid var(--learn-accent);background:var(--learn-accent);border-radius:9px;justify-content:center;align-items:center;gap:14px;min-height:40px;padding:9px 15px;font-size:12px;font-weight:600;transition:transform .15s,opacity .15s;display:inline-flex;color:#fff!important}.home-primary-button:hover{opacity:.92;transform:translateY(-1px)}:root[data-theme=dark] .home-primary-button{color:#0a0c0f!important}.home-course-state{color:var(--learn-tertiary);margin-top:13px;font-size:10px}.home-solver-panel{border:1px solid var(--learn-border);background:var(--learn-surface);box-shadow:var(--home-shadow-card);border-radius:15px;padding:21px 22px 19px}.home-panel-topline{align-items:center;gap:9px;display:flex}.home-icon-chip{background:var(--learn-accent-soft);width:27px;height:27px;color:var(--learn-accent);border-radius:8px;place-items:center;font-size:17px;display:grid}.home-live-label{color:var(--learn-tertiary);margin-left:auto;font-size:10px}.home-solver-panel h2{color:var(--learn-text);letter-spacing:-.025em;margin:14px 0 5px;font-family:Noto Serif SC,Georgia,serif;font-size:21px;font-weight:550}.home-solver-panel>p{color:var(--learn-tertiary);margin:0;font-size:11px;line-height:1.65}.home-solver-form{margin-top:15px}.home-solver-form textarea{resize:vertical;border:1px solid var(--learn-border);background:var(--learn-page);width:100%;min-height:118px;color:var(--learn-text);border-radius:9px;padding:11px 12px;font-size:12px;line-height:1.65;display:block}.home-solver-form textarea::placeholder{color:var(--learn-tertiary);opacity:.85}.home-solver-actions{flex-wrap:wrap;align-items:center;gap:13px;margin-top:12px;display:flex}.home-solver-submit{min-height:35px;padding:7px 12px;font-size:11px}.home-ocr-link{font-size:11px;color:var(--learn-secondary)!important}.home-ocr-link:hover{color:var(--learn-accent)!important}.home-privacy-note{border-top:1px solid var(--learn-border);padding-top:10px;color:var(--learn-tertiary)!important;margin-top:13px!important;font-size:10px!important}.home-inline-error{color:#b42332;margin:7px 0 0;font-size:11px}:root[data-theme=dark] .home-inline-error{color:#ff8787}.home-quick-links{border-top:1px solid var(--learn-border);border-bottom:1px solid var(--learn-border);grid-template-columns:repeat(4,minmax(0,1fr));display:grid}.home-quick-links>a{min-width:0;color:var(--learn-text);align-items:center;gap:11px;padding:17px 14px;display:flex}.home-quick-links>a+a{border-left:1px solid var(--learn-border)}.home-quick-links>a:hover{background:var(--learn-accent-soft)}.home-quick-symbol{background:var(--learn-subtle);width:29px;height:29px;color:var(--learn-accent);border-radius:9px;flex:none;place-items:center;font-family:Georgia,serif;font-size:16px;display:grid}.home-quick-links b,.home-quick-links small{text-overflow:ellipsis;display:block;overflow:hidden}.home-quick-links b{color:var(--learn-text);font-size:11px;font-weight:600}.home-quick-links small{color:var(--learn-tertiary);white-space:nowrap;margin-top:3px;font-size:9px}.home-arrow{color:var(--learn-tertiary);margin-left:auto;font-size:12px}.home-section{border-top:1px solid var(--learn-border);margin-top:45px;padding-top:23px;scroll-margin-top:92px}.home-section-heading{justify-content:space-between;align-items:end;gap:12px;margin-bottom:17px;display:flex}.home-section-heading h2{color:var(--learn-text);letter-spacing:-.025em;margin:5px 0 0;font-family:Noto Serif SC,Georgia,serif;font-size:20px;font-weight:550}.home-section-note{color:var(--learn-tertiary);font-size:10px}.home-workspace-grid{grid-template-columns:minmax(0,1.2fr) minmax(0,.8fr);align-items:start;gap:30px;display:grid}.home-workspace-cards{grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:15px;display:grid}.home-editorial-card{border-top:2px solid var(--learn-border);min-width:0;padding:16px 0 11px}.home-card-heading{align-items:center;gap:8px;min-width:0;display:flex}.home-status-dot{background:var(--learn-accent);border-radius:50%;flex:none;width:7px;height:7px}.home-status-dot.amber{background:var(--home-amber)}.home-status-dot.green{background:var(--home-green)}.home-status-dot.blue{background:var(--home-sky)}.home-status-dot.violet{background:var(--home-violet)}.home-status-dot.slate{background:var(--learn-tertiary)}.home-card-heading h3,.home-activity-heading h3,.home-profile-strip h3,.home-tools-strip h3{color:var(--learn-text);margin:0;font-size:13px;font-weight:620}.home-editorial-card>p,.home-profile-strip p,.home-tools-strip p{color:var(--learn-tertiary);margin:9px 0 13px;font-size:10px;line-height:1.75}.home-card-foot{border-top:1px solid var(--learn-border);flex-wrap:wrap;justify-content:space-between;align-items:center;gap:8px;padding-top:10px;display:flex}.home-card-foot a,.home-map-foot a{font-size:10px;font-weight:550;color:var(--learn-accent)!important}.home-card-foot span,.home-card-caption{color:var(--learn-tertiary);font-size:9px}.home-card-caption{margin:8px 0 4px}.home-weak-list,.home-material-list{margin:7px 0 12px;padding:0;list-style:none}.home-weak-list li,.home-material-list li{border-bottom:1px solid var(--learn-border);flex-direction:column;gap:3px;padding:7px 0;display:flex}.home-weak-list li:last-child,.home-material-list li:last-child{border-bottom:0}.home-weak-list li span,.home-material-list li span{color:var(--learn-secondary);font-size:10px}.home-weak-list li small,.home-material-list li small{color:var(--learn-tertiary);font-size:9px}.home-activity{border-top:2px solid var(--learn-border);min-width:0}.home-activity-heading{border-bottom:1px solid var(--learn-border);justify-content:space-between;align-items:center;gap:8px;padding:16px 0 12px;display:flex}.home-activity-heading span{color:var(--learn-tertiary);font-size:9px}.home-empty-state{padding:18px 4px 16px}.home-empty-mark{color:var(--learn-accent);letter-spacing:.15em;font-size:20px}.home-empty-state p{color:var(--learn-tertiary);margin:6px 0 8px;font-size:10px;line-height:1.7}.home-empty-state a{font-size:10px;color:var(--learn-accent)!important}.home-real-stats{border-top:1px solid var(--learn-border);grid-template-columns:repeat(3,minmax(0,1fr));padding:12px 0;display:grid}.home-real-stats>div{gap:3px;display:grid}.home-real-stats b{color:var(--learn-text);font-size:14px;font-weight:600}.home-real-stats small{color:var(--learn-tertiary);font-size:9px}.home-resource-grid{grid-template-columns:minmax(0,1.06fr) minmax(0,.94fr);align-items:start;gap:30px;display:grid}.home-map-card{border:1px solid var(--learn-border);background:var(--learn-surface);border-radius:13px;min-width:0;padding:17px 18px 13px}.home-map-mark{color:var(--learn-accent);font-size:15px}.home-map-card>p{color:var(--learn-tertiary);margin:7px 0 15px;font-size:10px;line-height:1.65}.home-concept-map{justify-content:space-between;align-items:center;gap:6px;min-height:70px;display:flex;overflow-x:auto}.home-map-node{border:1px solid var(--learn-border);background:var(--learn-page);color:var(--learn-secondary);border-radius:8px;flex:none;padding:9px 11px;font-size:10px}.home-map-node.is-current{border-color:color-mix(in srgb, var(--learn-accent) 40%, transparent);background:var(--learn-accent-soft);color:var(--learn-accent)}.home-concept-map>span{color:var(--learn-tertiary);flex:none;font-size:12px}.home-map-foot{border-top:1px solid var(--learn-border);flex-wrap:wrap;justify-content:space-between;gap:8px;padding-top:11px;display:flex}.home-map-foot>span{color:var(--learn-tertiary);font-size:9px}.home-resource-stack{gap:14px;display:grid}.home-materials-card{padding:2px 0 12px}.home-materials-card .home-card-heading>a{white-space:nowrap;margin-left:auto;font-size:9px;color:var(--learn-accent)!important}.home-profile-strip,.home-tools-strip{border-top:1px solid var(--learn-border);justify-content:space-between;align-items:center;gap:13px;padding:13px 0;display:flex}.home-profile-strip>div,.home-tools-strip>div{align-items:flex-start;gap:9px;min-width:0;display:flex}.home-profile-strip p,.home-tools-strip p{margin:4px 0 0}.home-profile-strip>a,.home-tools-strip>a{white-space:nowrap;flex:none;font-size:9px;color:var(--learn-accent)!important}.home-footer{border-top:1px solid var(--learn-border);color:var(--learn-tertiary);flex-wrap:wrap;justify-content:space-between;gap:10px;margin-top:35px;padding-top:13px;font-size:9px;display:flex}.home-notice{z-index:80;border:1px solid var(--learn-border);background:var(--learn-surface);color:var(--learn-text);box-shadow:var(--learn-shadow);border-radius:10px;padding:10px 14px;font-size:12px;position:fixed;bottom:20px;right:20px}@media (width<=960px){.home-content{width:min(100% - 36px,760px);padding-top:34px}.home-hero-grid{grid-template-columns:minmax(0,1fr) minmax(290px,.92fr);gap:24px}.home-learning-lead h1{font-size:clamp(32px,5vw,42px)}.home-workspace-grid,.home-resource-grid{grid-template-columns:minmax(0,1fr);gap:20px}.home-workspace-cards{grid-template-columns:repeat(2,minmax(0,1fr))}}@media (width<=720px){.home-header{padding:6px 10px 0;top:6px}.home-dock{min-height:52px;padding:7px 9px 7px 12px}.home-menu-toggle{display:grid}.home-nav-links{border:1px solid var(--learn-border);background:var(--learn-dock);box-shadow:var(--learn-shadow);-webkit-backdrop-filter:blur(16px);backdrop-filter:blur(16px);border-radius:13px;flex-direction:column;align-items:stretch;padding:7px;display:none;position:absolute;top:calc(100% + 8px);left:10px;right:10px}.home-nav-links.is-open{display:flex}.home-nav-links a{border-radius:8px;padding:10px 12px;font-size:12px}.home-content{width:min(100% - 28px,560px);padding-top:26px}.home-hero-grid{grid-template-columns:minmax(0,1fr);gap:15px;padding-top:14px}.home-learning-lead{padding:13px 2px}.home-learning-lead h1{margin-top:15px;font-size:clamp(32px,9vw,40px)}.home-lead-copy{font-size:13px}.home-course-path{margin:17px 0}.home-solver-panel{padding:17px}.home-solver-form textarea{min-height:96px}.home-quick-links{grid-template-columns:repeat(2,minmax(0,1fr))}.home-quick-links>a{gap:8px;padding:12px 9px}.home-quick-links>a:nth-child(3){border-left:0;border-top:1px solid var(--learn-border)}.home-quick-links>a:nth-child(4){border-top:1px solid var(--learn-border)}.home-quick-links small{white-space:normal;line-height:1.4}.home-section{margin-top:32px;padding-top:19px}.home-section-heading h2{font-size:18px}.home-section-note{text-align:right;max-width:130px;line-height:1.5}.home-workspace-cards{grid-template-columns:minmax(0,1fr);gap:13px}.home-editorial-card{padding-top:13px}.home-concept-map{justify-content:flex-start}.home-map-card{padding:14px}.home-profile-strip,.home-tools-strip{flex-direction:column;align-items:flex-start}.home-footer{flex-direction:column}.home-user-name{max-width:82px}.home-logout{padding:5px 7px;font-size:10px;display:inline-flex}}@media (width<=390px){.home-content{width:calc(100% - 24px)}.home-dock{gap:6px}.home-brand{gap:6px;font-size:12px}.home-brand-mark{width:23px;height:23px}.home-account{gap:5px}.home-user-name{max-width:62px;font-size:10px}.home-login{padding:5px 8px;font-size:10px}.home-theme-toggle,.home-menu-toggle{width:28px;height:28px}.home-quick-links b{font-size:10px}}@media (prefers-reduced-motion:reduce){*,:before,:after{scroll-behavior:auto!important;transition-duration:.01ms!important;animation-duration:.01ms!important;animation-iteration-count:1!important}}
