@import "https://fonts.googleapis.com/css2?family=Fira+Code:wght@400;500;600;700&family=Fira+Sans:wght@300;400;500;600;700&display=swap";
:root{--color-primary:#0d9488;--color-primary-dark:#0f766e;--color-on-primary:#000;--color-secondary:#2dd4bf;--color-accent:#d97706;--color-background:#f0fdfa;--color-foreground:#134e4a;--color-muted:#e8f1f4;--color-muted-foreground:#475569;--color-border:#d9e7e7;--color-danger:#b42318;--font-sans:"Fira Sans", Inter, ui-sans-serif, system-ui, sans-serif;--font-mono:"Fira Code", ui-monospace, monospace;--text-caption:.65625rem;--text-small:.765625rem;--text-body:.875rem;--text-card:.984375rem;--text-subheading:1.09375rem;--text-section:1.3125rem;--text-page:clamp(1.53125rem, 1.09375rem + 1.75vw, 1.96875rem);--text-metric:clamp(1.53125rem, 1.3125rem + .4375vw, 1.75rem);--text-hero:clamp(1.75rem, 1.09375rem + 2.625vw, 3.5rem);--leading-body:1.6;--leading-control:1.4;--leading-heading:1.25;--tracking-heading:-.02em;--mobile-nav-height:6rem;--shadow-card:0 10px 30px #134e4a0d}*{box-sizing:border-box}html{scroll-behavior:smooth;font-size:100%}body{color:var(--color-foreground);font-family:var(--font-sans);font-size:var(--text-body);line-height:var(--leading-body);overflow-wrap:anywhere;background:#fff;margin:0}h1,h2,h3{line-height:var(--leading-heading);letter-spacing:var(--tracking-heading);overflow-wrap:anywhere}h1{font-size:var(--text-page)}h2{font-size:var(--text-section)}h3{font-size:var(--text-subheading)}small{font-size:var(--text-small)}small,label{line-height:var(--leading-control)}a{color:inherit;text-decoration:none}button,input{font:inherit}button,a{-webkit-tap-highlight-color:transparent}button:focus-visible,a:focus-visible,input:focus-visible{outline-offset:3px;outline:3px solid #0d9488}::selection{color:#134e4a;background:#99f6e4}.brand-lockup{color:#102f2d;min-height:2.75rem;letter-spacing:var(--tracking-heading);align-items:center;gap:10px;font-weight:700;display:inline-flex}.language-toggle{color:#526b68;font-size:var(--text-small);background:#f8fbfa;border:1px solid #d9e7e7;border-radius:11px;flex:none;align-items:center;gap:3px;padding:3px;font-weight:700;display:inline-flex}.language-toggle button{min-width:2.75rem;min-height:2.75rem;color:inherit;cursor:pointer;background:0 0;border:1px solid #0000;border-radius:8px;padding:0 8px;transition:background-color .16s,border-color .16s,color .16s,box-shadow .16s}.language-toggle button[aria-pressed=true]{color:#0f766e;background:#fff;border-color:#c9e5df;box-shadow:0 1px 3px #134e4a1a}.language-toggle button:focus-visible{outline-offset:2px;outline:2px solid #0d9488}.language-toggle button:hover:not([aria-pressed=true]){color:#134e4a;background:#edf7f5}.brand-mark{object-fit:cover;border-radius:10px;flex:none;width:34px;height:34px;display:block}.button{cursor:pointer;min-width:0;max-width:100%;min-height:2.75rem;font-weight:600;font-size:var(--text-body);line-height:var(--leading-control);text-align:center;white-space:normal;overflow-wrap:anywhere;border:1px solid #0000;border-radius:10px;justify-content:center;align-items:center;gap:9px;padding:.625rem 1.125rem;transition:background-color .18s,color .18s,border-color .18s,box-shadow .18s;display:inline-flex}.button:disabled{cursor:not-allowed;opacity:.56}.button-primary{color:#171006;background:#d97706;box-shadow:0 4px 12px #d9770626}.button-primary:hover:not(:disabled){color:#fff;background:#b45309;box-shadow:0 6px 18px #b4530933}.button-secondary{color:#0f766e;font-size:var(--text-small);background:#fff;border-color:#b7d9d5}.button-secondary:hover:not(:disabled){border-color:var(--color-primary);background:#f0fdfa}.button-quiet{border-color:var(--color-border);color:#475569;font-size:var(--text-small);background:#fff}.button-quiet:hover:not(:disabled){background:#f8fafc;border-color:#94a3b8}.button-danger{color:#9c2f27;font-size:var(--text-small);background:#fff6f5;border-color:#f3c5c2}.button-danger:hover:not(:disabled){color:#7f1d1d;background:#feeceb;border-color:#e9a39d}.inline-link,.text-link{color:#0f766e;min-height:2.75rem;font-weight:600;line-height:var(--leading-control);align-items:center;gap:6px;display:inline-flex}.inline-link:hover,.text-link:hover{color:#134e4a}.eyebrow{color:#0f766e;font-family:var(--font-mono);font-size:var(--text-caption);letter-spacing:.06em;font-weight:600;line-height:var(--leading-control);overflow-wrap:anywhere;align-items:center;gap:7px;display:inline-flex}.close-session-dialog{width:min(500px,100% - 32px);max-width:none;max-height:calc(100dvh - 48px);color:var(--color-foreground);background:0 0;border:0;border-radius:16px;padding:0;overflow:visible}.close-session-dialog::backdrop{-webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px);background:#0f292680}.close-session-dialog[open]{animation:.18s ease-out session-dialog-enter}.close-session-dialog[open]::backdrop{animation:.18s ease-out session-dialog-backdrop-enter}.close-session-dialog-panel{max-height:inherit;border:1px solid var(--color-border);border-radius:inherit;background:#fff;padding:32px;position:relative;overflow-y:auto;box-shadow:0 20px 50px #134e4a2e}.dialog-dismiss{width:44px;height:44px;color:var(--color-muted-foreground);cursor:pointer;background:0 0;border:0;border-radius:10px;place-items:center;padding:0;transition:background-color .18s,color .18s;display:grid;position:absolute;top:12px;right:12px}.dialog-dismiss:hover:not(:disabled){color:var(--color-foreground);background:#edf7f5}.dialog-dismiss:disabled{cursor:not-allowed;opacity:.5}.dialog-warning-icon{width:52px;height:52px;color:var(--color-danger);background:#fff6f5;border:1px solid #f3c5c2;border-radius:16px;place-items:center;display:inline-grid}.close-session-dialog h2{font-family:var(--font-mono);font-size:var(--text-section);letter-spacing:var(--tracking-heading);line-height:var(--leading-heading);text-wrap:balance;margin:20px 0 10px}.close-session-dialog p{color:var(--color-muted-foreground);font-size:var(--text-body);line-height:var(--leading-body);margin:0}.close-session-dialog-actions{justify-content:flex-end;gap:12px;margin-top:28px;display:flex}.close-session-dialog-actions .button{min-height:46px;font-size:var(--text-small);padding:10px 18px}.dialog-confirm-button{border-color:var(--color-danger);background:var(--color-danger);color:#fff}.dialog-confirm-button:hover:not(:disabled){background:#912018;border-color:#912018}.close-session-dialog .dialog-error{margin:20px 0 0}@keyframes session-dialog-enter{0%{opacity:0;transform:translateY(8px)scale(.98)}to{opacity:1;transform:translateY(0)scale(1)}}@keyframes session-dialog-backdrop-enter{0%{opacity:0}to{opacity:1}}.marketing-page{overflow:hidden}.marketing-nav{flex-wrap:wrap;justify-content:space-between;align-items:center;gap:16px;max-width:1240px;min-height:78px;margin:auto;padding:16px 36px;display:flex}.marketing-nav nav{color:#526b68;font-size:var(--text-body);flex-wrap:wrap;align-items:center;gap:24px;font-weight:500;display:flex}.marketing-nav nav>a{align-items:center;min-height:2.75rem;display:inline-flex}.marketing-nav nav>a:first-child:hover{color:var(--color-foreground)}.nav-signin{color:#0f766e;align-items:center;gap:8px;min-height:2.75rem;display:inline-flex}.hero-section{grid-template-columns:repeat(2,minmax(0,1fr));align-items:center;gap:clamp(24px,4vw,70px);max-width:1240px;min-height:620px;margin:auto;padding:64px 36px 94px;display:grid}.hero-copy{min-width:0;max-width:520px}.hero-copy h1{color:#123b37;font-family:var(--font-mono);font-size:var(--text-hero);letter-spacing:var(--tracking-heading);font-weight:600;line-height:var(--leading-heading);margin:22px 0 19px}.hero-lede{color:#526b68;max-width:475px;font-size:var(--text-card);line-height:var(--leading-body);margin:0}.hero-actions{flex-wrap:wrap;align-items:center;gap:24px;margin-top:31px;display:flex}.hero-points{color:#617572;font-size:var(--text-small);flex-wrap:wrap;gap:18px;margin-top:25px;display:flex}.hero-points span{align-items:center;gap:5px;display:inline-flex}.hero-points svg{color:#0d9488}.hero-preview{background:#fff;border:1px solid #e1eeeb;border-radius:19px;min-width:0;padding:0 24px 27px;position:relative;transform:rotate(.6deg);box-shadow:0 24px 65px #134e4a1a}.preview-topbar{border-bottom:1px solid #edf2f1;justify-content:space-between;align-items:center;height:64px;display:flex}.preview-brand{color:#143d38;font-size:var(--text-body);align-items:center;gap:8px;font-weight:700;display:inline-flex}.mini-mark{object-fit:cover;border-radius:7px;flex:none;width:22px;height:22px;display:block}.preview-avatar,.avatar{color:#92400e;width:33px;height:33px;font-size:var(--text-caption);background:#ffedd5;border-radius:50%;flex:none;place-items:center;font-weight:700;display:inline-grid}.preview-content{padding:25px 4px 0}.preview-greeting{flex-direction:column;display:flex}.preview-greeting>span{color:#738784;font-family:var(--font-mono);font-size:var(--text-caption);letter-spacing:.07em}.preview-greeting strong{color:#143d38;font-family:var(--font-mono);font-size:var(--text-subheading);letter-spacing:var(--tracking-heading);margin-top:5px}.preview-greeting small{color:#687d79;font-size:var(--text-small)}.preview-stats{grid-template-columns:repeat(auto-fit,minmax(min(100%,10rem),1fr));gap:12px;margin-top:23px;display:grid}.preview-stats>div{background:#fbfefd;border:1px solid #e2efed;border-radius:11px;flex-direction:column;min-height:91px;padding:13px;display:flex}.preview-stats span,.preview-stats small{color:#6d827f;font-size:var(--text-small)}.preview-stats strong{color:#134e4a;font-family:var(--font-mono);font-size:var(--text-metric);line-height:var(--leading-heading);margin-top:4px}.preview-list-head{color:#143d38;font-size:var(--text-body);justify-content:space-between;margin:22px 0 9px;display:flex}.preview-list-head span{color:#0f766e}.preview-lesson{border-top:1px solid #edf2f1;flex-wrap:wrap;align-items:center;gap:10px;min-height:60px;padding:12px 0;display:flex}.lesson-art{border-radius:10px;flex:none;place-items:center;width:38px;height:38px;display:inline-grid}.art-teal{color:#0f766e;background:#ccfbf1}.art-amber{color:#b45309;background:#ffedd5}.preview-lesson>span:nth-child(2){flex-direction:column;flex:1;min-width:0;display:flex}.preview-lesson b{color:#244541;font-size:var(--text-body);white-space:normal;overflow-wrap:anywhere}.preview-lesson small{color:#78908b;font-size:var(--text-small)}.status-pill{color:#475569;width:fit-content;font-size:var(--text-caption);text-transform:capitalize;font-weight:600;line-height:var(--leading-control);overflow-wrap:anywhere;background:#f1f5f9;border-radius:999px;align-items:center;max-width:100%;padding:4px 9px;display:inline-flex}html[lang=vi] .status-pill{text-transform:none}.status-pill.published,.status-pill.active,.status-pill.approved{color:#166534;background:#dcfce7}.status-pill.draft,.status-pill.pending,.status-pill.processing{color:#854d0e;background:#fef3c7}.status-pill.failed,.status-pill.rejected,.status-pill.suspended,.status-pill.closed{color:#991b1b;background:#fee2e2}.status-pill.scheduled{color:#854d0e;background:#fef3c7}.status-pill.ended{color:#075985;background:#e0f2fe}.preview-note{background:#fff;border:1px solid #e5eeec;border-radius:12px;align-items:center;gap:10px;margin-top:20px;padding:12px 15px;display:flex;position:static;box-shadow:0 9px 28px #134e4a1a}.note-check{color:#15803d;background:#dcfce7;border-radius:50%;place-items:center;width:27px;height:27px;display:inline-grid}.preview-note>span:last-child{flex-direction:column;display:flex}.preview-note b{color:#234541;font-size:var(--text-body)}.preview-note small{color:#718580;font-size:var(--text-small)}.feature-section{background:#f4fbf9;padding:92px 36px 102px}.section-heading,.feature-grid{max-width:1168px;margin:0 auto}.section-heading h2{color:#123b37;font-family:var(--font-mono);font-size:var(--text-section);letter-spacing:var(--tracking-heading);line-height:var(--leading-heading);margin:14px 0 0}.section-heading h2 span{color:#0d9488}.feature-grid{grid-template-columns:repeat(auto-fit,minmax(min(100%,16rem),1fr));gap:19px;margin-top:42px;display:grid}.feature-card{background:#fff;border:1px solid #dfebe8;border-radius:14px;min-height:205px;padding:23px}.feature-icon{border-radius:11px;place-items:center;width:42px;height:42px;display:inline-grid}.feature-icon-0{color:#0f766e;background:#ccfbf1}.feature-icon-1{color:#1d4ed8;background:#dbeafe}.feature-icon-2{color:#b45309;background:#ffedd5}.feature-card h3{color:#173c38;font-size:var(--text-card);margin:16px 0 7px}.feature-card p{color:#647a76;font-size:var(--text-body);line-height:var(--leading-body);margin:0}.closing-cta{justify-content:space-between;align-items:center;gap:24px;max-width:1168px;margin:0 auto;padding:73px 36px;display:flex}.closing-cta h2{color:#123b37;font-family:var(--font-mono);font-size:var(--text-section);letter-spacing:var(--tracking-heading);margin:9px 0 0}.site-footer{color:#6b817c;min-height:78px;font-size:var(--text-small);border-top:1px solid #eaf0ee;flex-wrap:wrap;justify-content:space-between;align-items:center;gap:16px;padding:15px max(36px,50vw - 584px);display:flex}.site-footer .brand-mark{width:28px;height:28px;font-size:var(--text-body);border-radius:9px}.site-footer .brand-lockup{font-size:var(--text-small)}.auth-page{grid-template-columns:minmax(330px,.8fr) minmax(480px,1.2fr);min-height:100vh;display:grid}.auth-side-panel{background:#f0fdfa;flex-direction:column;justify-content:space-between;min-height:100vh;padding:37px clamp(30px,5vw,74px);display:flex}.auth-quote{max-width:430px;margin:auto 0;padding:55px 0}.auth-quote>svg{color:#0d9488}.auth-quote h1{color:#123b37;font-family:var(--font-mono);font-size:var(--text-page);letter-spacing:var(--tracking-heading);line-height:var(--leading-heading);margin:21px 0 15px}.auth-quote p,.auth-side-foot{color:#5f7974}.auth-side-foot{font-size:var(--text-small)}.auth-form-panel{flex-direction:column;justify-content:center;min-width:0;padding:35px clamp(30px,7vw,110px);display:flex}.auth-topbar{flex-wrap:wrap;justify-content:space-between;align-items:center;gap:16px;width:100%;max-width:560px;margin:0 auto;display:flex}.back-link{color:#58716c;width:fit-content;font-size:var(--text-small);min-height:2.75rem;font-weight:500;line-height:var(--leading-control);align-items:center;gap:8px;display:inline-flex}.back-link:hover{color:#0f766e}.auth-card{width:100%;max-width:430px;margin:47px auto}.auth-card h2{color:#163e39;font-family:var(--font-mono);font-size:var(--text-page);letter-spacing:var(--tracking-heading);line-height:var(--leading-heading);margin:10px 0 9px}.auth-card>p{color:#627a75;font-size:var(--text-body);margin:0 0 26px}.google-button{color:#213c38;background:#fff;border-color:#dae5e3;justify-content:flex-start;width:100%;min-height:52px;box-shadow:0 2px 6px #134e4a0a}.google-button:hover:not(:disabled){background:#f8fbfa;border-color:#a9c7c2}.google-button>span{text-align:left;flex:1}.google-mark{width:19px;height:19px}.auth-divider{color:#839590;font-family:var(--font-mono);font-size:var(--text-caption);letter-spacing:.1em;align-items:center;gap:12px;margin:24px 0 17px;display:flex}.auth-divider:before,.auth-divider:after{content:"";background:#e7efed;flex:1;height:1px}.auth-card .auth-privacy{color:#71847f;font-size:var(--text-small);line-height:var(--leading-body);margin:0}.auth-help{font-size:var(--text-small);margin-top:20px}.notice{color:#115e59;font-size:var(--text-body);background:#f0fdfa;border:1px solid #b7d9d5;border-radius:9px;margin:16px 0;padding:12px 14px}.notice-error{color:#9c2f27;background:#fff6f5;border-color:#f3c5c2}.notice code{font-family:var(--font-mono);font-size:var(--text-small)}.app-frame{background:#fbfdfc;min-height:100vh;display:flex}.sidebar{background:#fff;border-right:1px solid #e5edeb;flex-direction:column;flex:0 0 252px;width:252px;height:100vh;padding:26px 17px 16px;display:flex;position:sticky;top:0}.sidebar .brand-lockup{padding:0 8px}.workspace-label{color:#879994;font-family:var(--font-mono);font-size:var(--text-caption);letter-spacing:.1em;margin:40px 9px 12px;font-weight:600}.side-nav{flex-direction:column;gap:4px;display:flex}.nav-link{color:#58716c;min-height:2.75rem;font-size:var(--text-body);font-weight:500;line-height:var(--leading-control);border-radius:8px;align-items:center;gap:11px;padding:10px 11px;transition:background-color .16s,color .16s;display:flex}.nav-link:hover{color:#134e4a;background:#f4faf8}.nav-link.active{color:#0f766e;background:#e9f7f4;font-weight:600}.sidebar-bottom{margin-top:auto}.sidebar-create{color:#171006;min-height:2.75rem;font-size:var(--text-body);font-weight:600;line-height:var(--leading-control);background:#d97706;border-radius:9px;align-items:center;gap:8px;margin:0 0 17px;padding:10px 12px;transition:background-color .18s;display:flex}.sidebar-create:hover{color:#fff;background:#b45309}.profile-row{border-top:1px solid #edf2f1;align-items:center;gap:9px;padding:13px 3px 2px;display:flex}.profile-copy{flex-direction:column;flex:1;min-width:0;display:flex}.profile-copy strong{color:#244541;font-size:var(--text-small);white-space:normal;overflow-wrap:anywhere}.profile-copy small{color:#83938f;font-size:var(--text-small)}.icon-button{color:#607671;cursor:pointer;background:0 0;border:1px solid #0000;border-radius:9px;flex:none;place-items:center;width:2.75rem;height:2.75rem;transition:background-color .16s,color .16s;display:inline-grid}.icon-button:hover{color:#0f766e;background:#edf7f5}.main-area{flex-direction:column;flex:1;min-width:0;display:flex}.app-language-control{justify-content:flex-end;align-items:center;min-height:48px;padding:4px clamp(19px,4vw,58px) 0;display:flex}.content-page{width:min(100%,1160px);margin:0 auto;padding:0 clamp(22px,4vw,58px) 70px}.narrow-page{max-width:800px}.page-heading{margin-bottom:31px}.page-heading h1{color:#143d38;font-family:var(--font-mono);font-size:var(--text-page);letter-spacing:var(--tracking-heading);line-height:var(--leading-heading);margin:8px 0 6px}.page-heading>p,.page-heading div>p{color:#657d78;font-size:var(--text-body);margin:0}.page-heading-row{flex-wrap:wrap;justify-content:space-between;align-items:flex-end;gap:20px;display:flex}.page-heading-row .button{margin-bottom:3px}.metric-grid{grid-template-columns:repeat(auto-fit,minmax(min(100%,16rem),1fr));gap:15px;display:grid}.metric-card{min-height:7rem;box-shadow:var(--shadow-card);background:#fff;border:1px solid #e3eeeb;border-radius:12px;grid-template-columns:42px minmax(0,1fr);align-items:center;column-gap:14px;min-width:0;padding:17px;display:grid}.metric-icon{border-radius:10px;align-self:center;place-items:center;width:37px;height:37px;display:grid}.metric-icon.teal{color:#0f766e;background:#ccfbf1}.metric-icon.amber{color:#b45309;background:#ffedd5}.metric-icon.blue{color:#1d4ed8;background:#dbeafe}.metric-copy{flex-direction:column;justify-content:center;align-items:stretch;gap:.375rem;min-width:0;display:flex}.metric-label{color:#6b817c;font-size:var(--text-small);line-height:var(--leading-control);overflow-wrap:anywhere}.metric-value{color:#173f3a;font-family:var(--font-mono);font-size:var(--text-metric);letter-spacing:var(--tracking-heading);line-height:var(--leading-heading);overflow-wrap:anywhere;display:block}.section-block{margin-top:39px}.section-title-row{flex-wrap:wrap;justify-content:space-between;align-items:flex-end;gap:16px;margin-bottom:15px;display:flex}.section-title-row h2{color:#173f3a;font-family:var(--font-mono);font-size:var(--text-section);letter-spacing:var(--tracking-heading);margin:0}.section-title-row p{color:#718580;font-size:var(--text-small);margin:3px 0 0}.section-title-row .inline-link{font-size:var(--text-small)}.lesson-list{background:#fff;border:1px solid #e3eeeb;border-radius:12px;overflow:hidden}.lesson-row{border-bottom:1px solid #edf2f1;align-items:center;gap:13px;min-height:74px;padding:12px 17px;display:flex}.lesson-row:last-child{border-bottom:0}.lesson-details{flex-direction:column;flex:1;min-width:0;display:flex}.lesson-details strong{color:#234541;font-size:var(--text-body);white-space:normal;overflow-wrap:anywhere}.lesson-details small{color:#7d8e89;font-size:var(--text-small);white-space:normal;overflow-wrap:anywhere}.lesson-row time{color:#7d8e89;font-size:var(--text-small);white-space:nowrap}.tip-card{background:#fffaf2;border:1px solid #f1dfc8;border-radius:12px;flex-wrap:wrap;align-items:flex-start;gap:13px;margin-top:27px;padding:18px 20px;display:flex}.tip-icon{color:#b45309;background:#ffedd5;border-radius:10px;flex:none;place-items:center;width:35px;height:35px;display:inline-grid}.tip-card>div{flex:1;min-width:0}.tip-card strong{color:#694210;font-size:var(--text-body)}.tip-card p{color:#826c4f;font-size:var(--text-body);line-height:var(--leading-body);margin:3px 0 0}.tip-card .inline-link{font-size:var(--text-small);white-space:normal;margin:4px 0 0 8px}.empty-state{text-align:center;background:#fff;border:1px dashed #cbded9;border-radius:13px;flex-direction:column;justify-content:center;align-items:center;min-height:275px;padding:30px;display:flex}.empty-icon{color:#0f766e;background:#e9f7f4;border-radius:14px;place-items:center;width:48px;height:48px;display:inline-grid}.empty-state h3{color:#1b4540;font-family:var(--font-mono);font-size:var(--text-card);letter-spacing:var(--tracking-heading);margin:15px 0 4px}.empty-state p{color:#718580;max-width:430px;font-size:var(--text-body);margin:0 0 18px}.status-banner{background:#fffbeb;border:1px solid #f1ddb5;border-radius:11px;align-items:flex-start;gap:12px;margin-bottom:29px;padding:16px;display:flex}.status-dot{background:#d97706;border-radius:50%;flex:none;width:9px;height:9px;margin-top:5px}.status-banner strong{color:#74430c;font-size:var(--text-body)}.status-banner p{color:#826c4f;font-size:var(--text-body);margin:3px 0 0}.status-banner-error{background:#fff6f5;border-color:#f3c5c2}.status-banner-error .status-dot{background:#b42318}.status-banner-error strong,.status-banner-error p{color:#9c2f27}.page-loading,.page-message{color:#58716c;text-align:center;place-content:center;min-height:100vh;padding:24px;display:grid}.page-message h1{color:#143d38;font-family:var(--font-mono);font-size:var(--text-page)}.page-message p{max-width:500px}.skeleton-list{gap:10px;display:grid}.skeleton-list span{background:linear-gradient(90deg,#f1f6f5 20%,#e7efed 45%,#f1f6f5 70%) 0 0/200% 100%;border-radius:11px;height:67px;animation:1.3s ease-in-out infinite shimmer;display:block}@keyframes shimmer{to{background-position-x:-200%}}.spin{animation:.9s linear infinite spin}@keyframes spin{to{transform:rotate(360deg)}}.form-card{box-shadow:var(--shadow-card);background:#fff;border:1px solid #e3eeeb;border-radius:13px;padding:24px}.field-label{color:#294c47;font-size:var(--text-small);margin-bottom:7px;font-weight:600;display:block}.text-input{color:#173f3a;width:100%;min-height:3rem;font-size:var(--text-body);min-width:0;line-height:var(--leading-control);background:#fff;border:1px solid #cadbd7;border-radius:8px;padding:.625rem .8125rem}.text-input::placeholder{color:#92a29e;font-size:inherit}.text-input:focus-visible{outline-offset:1px;border-color:#0d9488;outline:3px solid #0d948829}.upload-dropzone{color:#48645f;cursor:pointer;text-align:center;background:#f8fdfc;border:1px dashed #9dc7c1;border-radius:10px;flex-direction:column;justify-content:center;align-items:center;min-height:163px;padding:20px;transition:background-color .16s,border-color .16s;display:flex}.upload-dropzone:hover,.upload-dropzone:focus-within{background:#effbf8;border-color:#0d9488}.upload-dropzone input{clip:rect(0, 0, 0, 0);white-space:nowrap;width:1px;height:1px;position:absolute;overflow:hidden}.upload-icon{color:#0f766e;background:#dff7f1;border-radius:12px;place-items:center;width:41px;height:41px;margin-bottom:9px;display:grid}.upload-dropzone strong{font-size:var(--text-body)}.upload-dropzone>span:last-of-type{color:#718580;font-size:var(--text-small)}.field-help{color:#778a85;font-size:var(--text-small);overflow-wrap:anywhere;margin:8px 0 0}.form-actions{flex-wrap:wrap;justify-content:flex-end;gap:9px;margin-top:22px;display:flex}.admin-summary{background:#f4fbf9;border:1px solid #d7e7e3;border-radius:11px;align-items:flex-start;gap:12px;margin-bottom:23px;padding:15px 17px;display:flex}.admin-summary-icon{color:#0f766e;background:#d6f4ec;border-radius:10px;flex:none;place-items:center;width:38px;height:38px;display:inline-grid}.admin-summary strong{color:#214944;font-size:var(--text-card)}.admin-summary p{color:#718580;font-size:var(--text-body);margin:2px 0 0}.application-list{gap:11px;display:grid}.application-card{background:#fff;border:1px solid #e3eeeb;border-radius:11px;flex-wrap:wrap;align-items:center;gap:13px;padding:16px;display:flex}.application-avatar{color:#075985;width:40px;height:40px;font-size:var(--text-body);background:#e0f2fe}.application-copy{flex-direction:column;flex:1;min-width:0;display:flex}.application-copy strong{color:#234541;font-size:var(--text-body)}.application-copy>span{color:#617873;font-size:var(--text-small);white-space:normal;overflow-wrap:anywhere}.application-copy small{color:#889792;font-size:var(--text-small)}.application-actions{flex-wrap:wrap;gap:8px;display:flex}.application-actions .button{min-height:2.75rem;font-size:var(--text-small);padding:.625rem .75rem}.library-list{margin-top:10px}.classroom-grid{grid-template-columns:repeat(auto-fit,minmax(min(100%,16rem),1fr));gap:14px;display:grid}.classroom-card{box-shadow:var(--shadow-card);background:#fff;border:1px solid #e3eeeb;border-radius:12px;min-width:0;padding:19px}.classroom-card-icon{color:#1d4ed8;background:#dbeafe;border-radius:11px;place-items:center;width:40px;height:40px;display:inline-grid}.classroom-card-title{flex-wrap:wrap;justify-content:space-between;align-items:flex-start;gap:10px;margin-top:13px;display:flex}.classroom-card h2{color:#1b4540;font-family:var(--font-mono);font-size:var(--text-card);letter-spacing:var(--tracking-heading);white-space:normal;overflow-wrap:anywhere;margin:0}.classroom-card>p{color:#718580;font-size:var(--text-small);margin:5px 0 18px}.classroom-card .inline-link{font-size:var(--text-small)}.classroom-default-lesson{flex-direction:column;gap:2px;display:flex;margin:0 0 15px!important}.classroom-default-lesson span{color:#718580;font-size:var(--text-small)}.classroom-default-lesson strong{color:#315650;font-size:var(--text-body);white-space:normal;overflow-wrap:anywhere}.classroom-card-actions,.classroom-detail-actions{flex-wrap:wrap;align-items:center;gap:8px;display:flex}.classroom-card-actions{margin-top:14px}.classroom-card-actions .inline-link{margin-right:auto}.classroom-card-actions .button,.classroom-detail-actions .button{min-height:2.75rem;font-size:var(--text-small);padding:.625rem .75rem}.classroom-archive-button{color:#8a3d32}.classroom-archive-button:hover:not(:disabled){color:#8a2e24;background:#fff7f5;border-color:#e6b8b2}.classroom-history{margin-top:30px}.classroom-history h2{color:#1b4540;font-family:var(--font-mono);font-size:var(--text-section);letter-spacing:var(--tracking-heading);margin:5px 0 0}.classroom-session-history{gap:8px;margin:14px 0 0;padding:0;list-style:none;display:grid}.classroom-session-history li{color:#526b68;min-height:54px;font-size:var(--text-small);background:#fff;border:1px solid #e3eeeb;border-radius:10px;flex-wrap:wrap;align-items:center;gap:12px;padding:10px 13px;display:flex}.classroom-session-history li small{color:#778a85;margin-left:auto}.active-session-card{background:#f3fbf8;border:1px solid #cde8e1;border-radius:12px;flex-wrap:wrap;justify-content:space-between;align-items:center;gap:18px;margin:4px 0 23px;padding:18px 20px;display:flex}.active-session-copy{min-width:0}.active-session-copy h2{color:#1b4540;font-family:var(--font-mono);font-size:var(--text-subheading);letter-spacing:var(--tracking-heading);margin:8px 0 5px}.active-session-copy p{color:#617873;font-size:var(--text-small);margin:3px 0 0}.close-active-session{flex:none;min-height:44px}.classroom-report-grid{grid-template-columns:repeat(auto-fit,minmax(min(100%,16rem),1fr))}.interaction-summary{background:#fff;border:1px solid #e3eeeb;border-radius:11px;margin-top:18px;padding:16px 18px}.interaction-summary h3{color:#234541;font-size:var(--text-subheading);margin:0 0 10px}.interaction-summary ul{gap:8px;margin:0;padding:0;list-style:none;display:grid}.interaction-summary li{color:#526b68;font-size:var(--text-body);overflow-wrap:anywhere;background:#f4fbf9;border-radius:8px;justify-content:space-between;align-items:center;gap:12px;padding:8px 10px;display:flex}.interaction-summary li strong{color:#173f3a;font-family:var(--font-mono)}.session-history-copy{flex-direction:column;flex:12rem;gap:4px;min-width:0;display:flex}.session-history-copy strong{color:#315650;font-size:var(--text-body);white-space:normal;overflow-wrap:anywhere}.session-history-copy span{color:#778a85;font-size:var(--text-small)}.session-report-link{flex:none}.history-pagination{flex-wrap:wrap;justify-content:center;align-items:center;gap:12px;margin-top:15px;display:flex}.history-pagination .button{min-height:2.75rem}.history-pagination span{color:#617873;font-size:var(--text-small)}.notice-success{color:#166534;background:#f0fbf4;border-color:#b8e0ce}.notice-info{color:#24546b;background:#f1f8fc;border-color:#c8dfeb}.session-report-meta{background:#fff;border:1px solid #e3eeeb;border-radius:10px;flex-wrap:wrap;align-items:center;gap:8px 16px;margin:4px 0 24px;padding:13px 15px;display:flex}.session-report-meta p{color:#617873;font-size:var(--text-small);margin:0}.session-classroom-name{color:#718580;font-size:var(--text-small);margin:-13px 0 16px}.session-classroom-name strong{color:#315650}.lesson-picker,.lesson-picker-control{position:relative}.lesson-picker-input{padding-left:39px;padding-right:3.5rem}.lesson-picker-search,.lesson-picker-chevron{z-index:1;color:#718580;pointer-events:none;position:absolute;top:50%;transform:translateY(-50%)}.lesson-picker-search{left:13px}.lesson-picker-chevron{right:13px}.lesson-picker-clear{color:#718580;cursor:pointer;background:0 0;border:0;border-radius:7px;place-items:center;width:2.75rem;height:2.75rem;display:grid;position:absolute;top:50%;right:2px;transform:translateY(-50%)}.lesson-picker-clear:hover{color:#134e4a;background:#edf7f5}.lesson-picker-menu{z-index:10;background:#fff;border:1px solid #ccdfdb;border-radius:10px;position:absolute;top:calc(100% + 6px);left:0;right:0;overflow:hidden;box-shadow:0 12px 30px #134e4a1f}.lesson-picker-options{max-height:270px;margin:0;padding:5px;list-style:none;overflow:auto}.lesson-picker-option{color:#315650;cursor:pointer;text-align:left;background:#fff;border:0;border-radius:7px;justify-content:space-between;align-items:center;gap:12px;width:100%;min-height:58px;padding:9px 11px;display:flex}.lesson-picker-option:hover,.lesson-picker-option.active,.lesson-picker-option[aria-selected=true]{color:#0f6159;background:#eff9f6}.lesson-picker-option:focus-visible{z-index:1;outline-offset:-3px;outline:3px solid #0d9488;position:relative}.lesson-picker-option-copy{flex-direction:column;gap:2px;min-width:0;display:flex}.lesson-picker-option strong{font-size:var(--text-body);white-space:normal;overflow-wrap:anywhere}.lesson-picker-option small{color:#718580;font-size:var(--text-small)}.lesson-picker-state{color:#617873;min-height:54px;font-size:var(--text-small);align-items:center;gap:9px;margin:0;padding:12px 14px;display:flex}.lesson-picker-selected{margin-top:6px}.field-gap{margin-top:22px}.lesson-action-bar,.share-link-card{background:#fff;border:1px solid #e3eeeb;border-radius:12px;flex-wrap:wrap;justify-content:space-between;align-items:center;gap:18px;padding:18px;display:flex}.lesson-action-bar>div:first-child,.share-link-card>div:first-child{flex:16rem;min-width:0}.lesson-action-bar strong,.share-link-card strong{color:#234541;font-size:var(--text-body)}.lesson-action-bar p,.share-link-card p{color:#718580;font-size:var(--text-small);margin:3px 0 0}.lesson-actions{flex-wrap:wrap;gap:8px;display:flex}.lesson-actions .button{min-height:2.75rem;font-size:var(--text-small);padding:.625rem .75rem}.share-link-card{margin-top:12px;display:block}.share-link-card .copy-row{max-width:none;margin-top:11px}.share-link-card .copy-row .button{min-height:2.75rem}.version-list{background:#fff;border:1px solid #e3eeeb;border-radius:12px;overflow:hidden}.version-row{border-bottom:1px solid #edf2f1;flex-wrap:wrap;align-items:center;gap:12px;min-height:68px;padding:12px 16px;display:flex}.version-row:last-child{border-bottom:0}.version-icon{color:#64748b;background:#f1f5f9;border-radius:9px;flex:none;place-items:center;width:34px;height:34px;display:inline-grid}.version-icon.ready{color:#15803d;background:#dcfce7}.version-icon.failed{color:#b42318;background:#fee2e2}.version-copy{flex-direction:column;flex:10rem;min-width:0;display:flex}.version-copy strong{color:#234541;font-size:var(--text-body);white-space:normal;overflow-wrap:anywhere}.version-copy span{color:#7d8e89;font-size:var(--text-small)}.current-version{color:#0f766e;font-size:var(--text-caption);font-weight:600}.version-publish{min-height:2.75rem;font-size:var(--text-small);padding:.625rem .75rem}.classroom-heading{margin-top:26px}.classroom-next-step{box-shadow:var(--shadow-card);background:#fff;border:1px solid #e3eeeb;border-radius:12px;align-items:flex-start;gap:15px;padding:20px;display:flex}.classroom-next-step h2{color:#1b4540;font-family:var(--font-mono);font-size:var(--text-subheading);letter-spacing:var(--tracking-heading);margin:1px 0 5px}.classroom-next-step p{color:#718580;max-width:560px;font-size:var(--text-body);margin:0 0 13px}.classroom-next-step .inline-link{font-size:var(--text-small)}.datetime-grid{grid-template-columns:1fr 1fr;gap:12px;margin-top:21px;display:grid}.datetime-grid input{min-width:0}.session-ready{box-shadow:var(--shadow-card);text-align:center;background:#fff;border:1px solid #e3eeeb;border-radius:13px;flex-direction:column;align-items:center;padding:25px;display:flex}.qr-wrap{aspect-ratio:1;background:#fff;border:1px solid #e5edeb;border-radius:13px;place-items:center;width:min(100%,15.375rem);height:auto;margin:19px 0 13px;display:grid}.qr-caption{color:#244541;font-family:var(--font-mono);font-size:var(--text-body)}.session-ready>.field-help{max-width:360px;margin:5px 0 17px}.copy-row{gap:8px;width:100%;max-width:520px;display:flex}.copy-row .text-input{color:#546c67;min-width:0;font-size:var(--text-body);flex:1}.copy-row .button{min-width:100px}.close-session{margin-top:20px}.join-page{background:radial-gradient(at top,#f0fdfa 0,#fff 56%);flex-direction:column;align-items:center;min-height:100vh;padding:28px 20px 18px;display:flex}.join-topbar{justify-content:space-between;align-items:center;gap:16px;width:min(100%,1440px);display:flex}.join-card{background:#fff;border:1px solid #e3eeeb;border-radius:15px;width:min(100%,440px);margin:auto;padding:31px;box-shadow:0 16px 45px #134e4a14}.join-icon{color:#0f766e;background:#dff7f1;border-radius:13px;place-items:center;width:46px;height:46px;margin-bottom:19px;display:grid}.join-card h1{color:#143d38;font-family:var(--font-mono);font-size:var(--text-page);letter-spacing:var(--tracking-heading);margin:8px 0 6px}.join-card>p{color:#718580;font-size:var(--text-body);margin:0 0 22px}.join-submit{width:100%;margin-top:17px}.join-submit>svg:last-child{margin-left:auto}.join-footer{color:#879994;font-size:var(--text-small)}.join-page.lesson-active{min-height:100vh;padding:24px}.lesson-frame-card{background:#fff;border:1px solid #e3eeeb;border-radius:20px;width:min(100%,1440px);height:min(82vh,900px);min-height:480px;overflow:hidden;box-shadow:0 16px 45px #134e4a14}.lesson-frame{background:#fff;border:0;width:100%;height:100%}.skip-link{z-index:20;color:#fff;background:#123b37;border-radius:8px;padding:10px 14px;font-weight:600;position:fixed;top:10px;left:10px;transform:translateY(-160%)}.skip-link:focus{transform:translateY(0)}.docs-page{color:#244541;background:#fbfdfc;min-height:100vh}.docs-topbar{background:#fff;border-bottom:1px solid #e5edeb;flex-wrap:wrap;justify-content:space-between;align-items:center;gap:20px;min-height:76px;padding:16px max(28px,50vw - 590px);display:flex}.docs-topbar .brand-lockup{font-size:var(--text-card)}.docs-top-actions{flex-wrap:wrap;align-items:center;gap:22px;display:flex}.docs-home-link{color:#526b68;font-size:var(--text-small);align-items:center;min-height:2.75rem;font-weight:600;display:inline-flex}.docs-home-link:hover{color:#0f766e}.docs-layout{grid-template-columns:220px minmax(0,760px);justify-content:center;gap:75px;padding:57px 32px 90px;display:grid}.docs-sidebar{flex-direction:column;gap:8px;height:max-content;padding-top:8px;display:flex;position:sticky;top:26px}.docs-sidebar .eyebrow{font-size:var(--text-caption);margin-bottom:10px}.docs-sidebar a{color:#637974;font-size:var(--text-small);min-height:2.75rem;line-height:var(--leading-control);border-left:2px solid #0000;border-radius:0 7px 7px 0;padding:9px 11px}.docs-sidebar a:hover,.docs-sidebar a:focus-visible{color:#0f766e;background:#edf8f6;border-left-color:#0d9488}.docs-content{min-width:0}.docs-heading{border-bottom:1px solid #e5edeb;padding:8px 0 34px}.docs-heading h1{color:#143d38;font-family:var(--font-mono);font-size:var(--text-page);letter-spacing:var(--tracking-heading);line-height:var(--leading-heading);margin:12px 0 8px}.docs-heading>p{color:#617873;max-width:620px;font-size:var(--text-body);line-height:var(--leading-body);margin:0 0 23px}.docs-heading .button{min-height:2.75rem;font-size:var(--text-small)}.docs-section{border-bottom:1px solid #e5edeb;padding:30px 0;scroll-margin-top:24px;position:relative}.docs-section-icon{color:#0f766e;background:#e2f7f2;border-radius:10px;place-items:center;width:35px;height:35px;margin-bottom:10px;display:inline-grid}.docs-section h2{color:#1b4540;font-family:var(--font-mono);font-size:var(--text-section);letter-spacing:var(--tracking-heading);margin:0 0 9px}.docs-section p{color:#617873;max-width:700px;font-size:var(--text-body);line-height:var(--leading-body);margin:8px 0}.docs-section pre{color:#244541;font-family:var(--font-mono);font-size:var(--text-small);line-height:var(--leading-body);white-space:pre-wrap;overflow-wrap:anywhere;background:#f1f7f5;border:1px solid #e1eeeb;border-radius:10px;margin:15px 0 10px;padding:15px 17px;overflow-x:auto}.docs-section code{font-family:var(--font-mono);font-size:var(--text-small);line-height:var(--leading-body)}.docs-section 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