@layer base, components, responsive;
@layer base {
  :root{--ink:#183135;--muted:#657475;--paper:#f8f8f3;--white:#fff;--line:#dce3df;--teal:#126e65;--mint:#dceee7;--rail:#142c30;--rail-ink:#dce6e3;--gold:#e4bd78;--danger:#9d3934;font-family:"Trebuchet MS",Verdana,sans-serif;color:var(--ink);background:var(--paper);font-size:14px;font-synthesis:none}
  *{box-sizing:border-box}body{margin:0}button,input,textarea{font:inherit}button,a,input,textarea{touch-action:manipulation}button{cursor:pointer}button:disabled{cursor:not-allowed;opacity:.48}button,a,input,textarea,summary{outline-offset:5px}button:focus-visible,a:focus-visible,input:focus-visible,textarea:focus-visible{outline:2px solid var(--teal)}a{color:var(--teal);text-underline-offset:4px}h1,h2,h3,p{margin-top:0}h1,h2{font-family:Georgia,"Times New Roman",serif;font-weight:400;letter-spacing:-.035em}h3{font-weight:600}p{line-height:1.65}button{border:0}ul{padding-left:1.4rem}li{line-height:1.65}progress{appearance:none;border:0}progress::-webkit-progress-bar{background:#30474a;border-radius:5px}progress::-webkit-progress-value{background:var(--gold);border-radius:5px}progress::-moz-progress-bar{background:var(--gold);border-radius:5px}[hidden]{display:none!important}.sr-only{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap}.skip-link{position:fixed;top:-80px;left:15px;z-index:10;background:var(--white);padding:14px}.skip-link:focus{top:10px}.eyebrow{font-size:.68rem;font-weight:700;letter-spacing:.15em;line-height:1.5}.primary-button,.secondary-button{min-height:44px;padding:12px 19px;border-radius:4px;display:inline-flex;justify-content:center;align-items:center;gap:20px;font-weight:600;font-size:.88rem;transition:background .15s,transform .15s}.primary-button{background:var(--teal);color:white}.primary-button:hover:not(:disabled){background:#0c564f;transform:translateY(-1px)}.secondary-button{background:var(--mint);color:var(--ink)}.text-button{background:transparent;color:inherit;padding:8px 0;min-height:40px;font-size:.78rem;text-decoration:underline;text-underline-offset:5px}.status:empty{display:none}.status{background:#fff3df;border:1px solid #ead3a9;padding:12px;margin-bottom:20px;font-size:.9rem}.status.error,#chat-status,#admin-status{color:var(--danger)}
}
@layer components {
  .topbar{height:76px;padding:0 30px;display:flex;align-items:center;gap:30px;background:var(--white);border-bottom:1px solid var(--line)}.brand{color:var(--ink);text-decoration:none;display:flex;align-items:center;gap:13px;font-size:1.13rem;letter-spacing:.035em;white-space:nowrap}.brand b{font-size:.62rem;font-weight:600;letter-spacing:.17em;margin-left:5px}.brand-mark{height:32px;width:32px;display:flex;align-items:center;justify-content:center;border:1px solid var(--ink);font-family:Georgia,serif;font-size:24px;position:relative}.brand-mark span{font-family:Verdana,sans-serif;font-size:16px;position:absolute;right:-6px;top:-7px;background:white;line-height:1}.header-caption{font-family:Georgia,serif;color:var(--muted);font-style:italic;font-size:.94rem}.account{margin-left:auto;display:flex;gap:19px;align-items:center}.account>span{font-size:.75rem;color:var(--muted);max-width:220px;overflow:hidden;text-overflow:ellipsis}.auth-screen{min-height:calc(100vh - 76px);display:grid;grid-template-columns:1.25fr 1fr;align-items:center;gap:10%;max-width:1200px;padding:7% 6%;margin:auto}.welcome-copy .eyebrow{color:var(--teal);margin-bottom:28px}.welcome-copy h1{font-size:clamp(3.4rem,5vw,5.4rem);line-height:1.03;margin-bottom:25px}.welcome-deck{font-size:1.08rem;color:var(--muted);max-width:410px}.welcome-rule{width:65px;height:2px;background:var(--teal);margin:35px 0}.welcome-facts{display:flex;gap:26px;font-size:.7rem;color:var(--muted)}.welcome-facts b{display:block;color:var(--ink);font-family:Georgia,serif;font-size:1.8rem;font-weight:400;margin-bottom:6px}.signin-card{background:var(--white);padding:42px;border:1px solid var(--line);box-shadow:0 16px 50px #233e3610;border-radius:4px}.small-mark{display:block;font-size:2rem;color:var(--teal);margin-bottom:34px}.signin-card h2{font-size:2.5rem;line-height:1.1;margin:18px 0}.signin-card>p:not(.eyebrow){font-size:.86rem;color:var(--muted)}.signin-card .primary-button{width:100%;margin:12px 0 20px;gap:14px}.signin-card .primary-button span{background:white;color:var(--teal);width:22px;height:22px;border-radius:50%;display:grid;place-items:center;font-weight:700}#auth-status{font-size:.75rem;min-height:3em}.fine-print{padding-top:25px;border-top:1px solid var(--line);font-size:.72rem!important}.workspace{display:grid;grid-template-columns:268px minmax(440px,1fr) 338px;align-items:start;max-width:1900px;margin:auto}.syllabus{background:var(--rail);color:var(--rail-ink);min-height:calc(100vh - 76px);position:sticky;top:0;max-height:100vh;overflow:auto;scrollbar-width:thin;scrollbar-color:#45605e var(--rail)}.rail-heading{padding:29px 25px 17px}.rail-heading .eyebrow{color:#9aafaa;margin-bottom:8px}.rail-toggle{font-family:Georgia,serif;background:transparent;color:white;font-size:1.65rem;padding:0;width:100%;display:flex;justify-content:space-between;align-items:center}.rail-toggle span{font-family:Verdana,sans-serif;font-size:1rem;display:none}.course-progress{margin:0 25px 24px;padding-bottom:25px;border-bottom:1px solid #395054}.course-progress>div{display:flex;justify-content:space-between;align-items:baseline}.course-progress strong{font-size:1.05rem;font-weight:400;color:var(--gold)}.course-progress span{font-size:.67rem;color:#a9bab7}.course-progress progress{width:100%;height:4px;margin:13px 0 19px;display:block}.resume-button{width:100%;border:1px solid #617470;border-radius:3px;background:transparent;color:white;font-size:.78rem;padding:11px 13px;display:flex;justify-content:space-between}.resume-button span{font-size:1rem;color:var(--gold)}.syllabus-group{border-bottom:1px solid #2e4548;padding:17px 0}.syllabus-group summary{cursor:pointer;list-style:none;padding:0 25px;display:flex;gap:10px;align-items:baseline;line-height:1.5;font-size:.76rem;font-weight:600}.syllabus-group summary::before{content:'+';color:var(--gold);font-weight:400;font-size:1rem}.syllabus-group[open] summary::before{content:'−'}.syllabus-group summary span{font-size:.68rem;color:#a6b9b1;white-space:nowrap;margin-left:auto;font-weight:400}.lesson-link{display:flex;align-items:flex-start;text-align:left;gap:11px;width:100%;padding:12px 21px 12px 30px;background:transparent;color:#c8d5d1;font-size:.72rem;line-height:1.55;border-left:3px solid transparent}.lesson-link:first-of-type{margin-top:14px}.lesson-link[aria-current=page]{background:#284347;border-left-color:var(--gold);color:white}.lesson-link:hover:not(:disabled){background:#203b3f}.lesson-link .lesson-symbol{font-size:.8rem;color:#9cb7ad;min-width:13px}.lesson-link[aria-current=page] .lesson-symbol{color:var(--gold)}.lesson-link:disabled{opacity:.55}.weak-card{margin:27px 25px;padding:17px;border:1px solid #3c5557;border-radius:4px;background:#1c363a}.weak-card .eyebrow{color:var(--gold);font-size:.6rem;margin-bottom:9px}.weak-card h3{font-size:.8rem;font-weight:400;margin-bottom:9px}.weak-card li,.weak-card p:not(.eyebrow){font-size:.71rem;color:#b8cbc4}.weak-card ul{margin:0;padding-left:15px}.rail-footnote{font-size:.64rem;color:#8fa7a2;padding:0 25px 26px;line-height:1.8}.learning-main{padding:38px clamp(27px,3.4vw,66px) 24px;min-width:0}.lesson-masthead{padding-bottom:29px;border-bottom:1px solid var(--line);margin-bottom:25px}.lesson-masthead>.eyebrow{color:var(--teal);margin-bottom:22px}.lesson-meta{display:flex;justify-content:space-between;gap:15px;color:var(--muted);font-size:.68rem;margin-bottom:15px}.lesson-meta span:first-child{font-weight:600}.lesson-masthead h1{font-size:clamp(2.2rem,3vw,3.4rem);line-height:1.1;margin-bottom:18px;overflow-wrap:anywhere}.lesson-deck{color:var(--muted);font-size:1rem;line-height:1.8;margin-bottom:0}.saved-state{background:#eaf0e8;border-left:2px solid #8fac92;padding:15px 18px;margin-bottom:28px}.saved-state>div{display:flex;align-items:center;gap:7px}.saved-state strong{font-size:.72rem;font-weight:600}.status-dot{width:6px;height:6px;display:inline-block;border-radius:50%;background:var(--teal)}.saved-state p{font-size:.78rem;margin:7px 0 0;color:#53685d}.objectives h2{font-family:inherit;font-size:.78rem;letter-spacing:0;font-weight:600}.objectives ul{font-size:.87rem;color:#4c6263;margin:10px 0 25px}.section-nav{display:flex;gap:8px;flex-wrap:wrap;padding:18px 0;border-top:1px solid var(--line);border-bottom:1px solid var(--line);margin-bottom:35px}.section-nav button{background:transparent;padding:5px 9px;color:var(--muted);font-size:.68rem;border-radius:3px}.section-nav button[aria-current=step]{background:var(--mint);color:var(--teal)}.lesson-section{scroll-margin-top:25px;margin-bottom:36px}.lesson-section .section-number{font-size:.65rem;letter-spacing:.12em;color:var(--teal)}.lesson-section h2{font-size:1.8rem;margin:9px 0 17px;line-height:1.2}.lesson-section .section-body{font-family:Georgia,"Times New Roman",serif;font-size:1.06rem;line-height:1.95;white-space:pre-wrap;overflow-wrap:anywhere}.checkpoint{background:transparent;border-bottom:1px solid var(--line);padding:9px 0;color:var(--teal);font-size:.73rem;margin-top:12px;min-height:40px}.takeaways{background:#eef1ec;padding:25px 27px;border-radius:3px;margin:40px 0}.takeaways h2{font-size:1.5rem}.takeaways li{font-size:.86rem;margin-bottom:8px}.takeaways ul{margin-bottom:0}.lesson-sources{margin:35px 0}.lesson-sources .eyebrow{color:var(--muted);margin-bottom:8px}.lesson-sources h2{font-size:1.6rem}.lesson-sources ul{list-style:none;padding:0}.lesson-sources li{padding:8px 0;border-bottom:1px solid var(--line);font-size:.8rem}.lesson-sources a::after{content:' ↗'}.assessment-launch{display:flex;align-items:center;gap:20px;justify-content:space-between;border-top:1px solid var(--line);padding:30px 0}.assessment-launch .eyebrow{color:var(--teal);margin-bottom:9px}.assessment-launch h2{font-size:1.8rem;margin-bottom:12px}.assessment-launch p:last-child{font-size:.77rem;color:var(--muted);margin-bottom:0}.assessment-launch button{flex-shrink:0}.quiz-panel{padding:28px;background:var(--white);border:1px solid var(--line);border-radius:4px;scroll-margin-top:20px}.quiz-panel h2{font-size:1.9rem}.quiz-panel>p:not(.eyebrow){font-size:.82rem;color:var(--muted)}fieldset{border:0;padding:22px 0;margin:0;border-top:1px solid var(--line);min-width:0}legend{font-size:.9rem;font-weight:600;line-height:1.6;padding-top:20px;margin-bottom:12px;white-space:pre-wrap}fieldset label{display:flex;align-items:flex-start;gap:10px;font-size:.83rem;border:1px solid var(--line);border-radius:3px;padding:12px;margin-bottom:8px;cursor:pointer;line-height:1.5;white-space:pre-wrap}fieldset label:has(input:checked){border-color:var(--teal);background:#eef6f1}input[type=radio]{accent-color:var(--teal);margin-top:3px;flex-shrink:0}#quiz-result{margin:22px 0 16px;line-height:1.7}#quiz-result h3{font-family:Georgia,serif;font-weight:400;font-size:1.6rem}#quiz-result p{font-size:.83rem}.feedback{padding:13px 0;border-top:1px solid var(--line)}.feedback strong{font-size:.8rem}.quiz-panel>.primary-button,.quiz-panel>.secondary-button{margin:0 8px 8px 0}.lesson-footer{border-top:1px solid var(--line);padding-top:20px;font-size:.64rem;color:var(--muted);line-height:1.8;margin-top:25px}.lesson-footer span{display:block}.tutor{background:#f0f4ef;border-left:1px solid var(--line);height:calc(100vh - 76px);min-height:600px;position:sticky;top:0;display:flex;flex-direction:column}.tutor-header{padding:29px 23px 17px;display:flex;align-items:center;gap:12px}.tutor-avatar{font-family:Georgia,serif;color:var(--teal);font-size:2.3rem;background:#d9e9dd;width:43px;height:43px;display:flex;align-items:center;justify-content:center;border:1px solid #adc9b8;border-radius:50%;line-height:1}.tutor-avatar span{color:#c18d43}.tutor-header .eyebrow{font-size:.55rem;color:var(--teal);margin-bottom:3px}.tutor-header h2{font-size:1.6rem;margin-bottom:0}.tutor-header button{margin-left:auto;font-size:.67rem}.tutor-intro{margin:0 23px 16px;font-size:.77rem;line-height:1.75;color:var(--muted)}.tutor-context{border-top:1px solid #d7e0d6;border-bottom:1px solid #d7e0d6;padding:11px 23px;font-size:.65rem;color:#59736b;margin-bottom:0}.transcript{padding:22px 20px;overflow:auto;flex:1;scrollbar-width:thin;min-height:150px}.chat-message{margin-bottom:22px;animation:arrive .2s ease-out}.chat-message .speaker{font-size:.59rem;font-weight:700;letter-spacing:.12em;color:var(--teal);margin-bottom:8px}.chat-message.user .speaker{color:#727d74}.chat-message .message-body{font-size:.84rem;line-height:1.8;white-space:pre-wrap;overflow-wrap:anywhere;margin-bottom:0}.chat-message.user .message-body{background:#e0e9df;border-radius:3px;padding:11px 13px}.tutor-composer{padding:0 18px 16px}.tutor-composer form{background:white;border:1px solid #b7c9bd;border-radius:5px;overflow:hidden}.tutor-composer textarea{display:block;width:100%;border:0;background:transparent;padding:14px;resize:vertical;min-height:85px;max-height:250px;font-size:.8rem;color:var(--ink);line-height:1.6}.composer-footer{display:flex;align-items:center;gap:10px;padding:0 10px 9px}.composer-footer span{font-size:.52rem;color:var(--muted)}.composer-footer button{margin-left:auto;background:var(--teal);color:white;font-size:1.4rem;border-radius:3px;width:35px;height:34px}.memory-note{font-size:.59rem;color:var(--muted);text-align:center;line-height:1.65;margin:10px 0 0}#chat-status{font-size:.73rem;min-height:0;line-height:1.5}#chat-status:empty{display:none}.admin-panel h2{font-size:2rem;margin-bottom:15px}.admin-panel>p{font-size:.86rem;color:var(--muted)}.panel-heading{display:flex;align-items:flex-start;justify-content:space-between;gap:15px}.invite-input{display:flex;gap:8px;margin-top:10px}.invite-input input{min-width:0;flex:1;padding:11px;border:1px solid var(--line);border-radius:3px}.admin-panel label{font-size:.8rem}.invite-list{padding:0;list-style:none;margin-top:25px}.invite-list li{padding:15px 0;border-top:1px solid var(--line);display:flex;align-items:center;justify-content:space-between;gap:15px;overflow-wrap:anywhere}.invite-list small{color:var(--muted);font-size:.69rem;display:block}.invite-list button{color:var(--danger);font-size:.73rem}.admin-panel[hidden]+article{display:block}@keyframes arrive{from{opacity:0;transform:translateY(4px)}to{opacity:1;transform:translateY(0)}}
}
@layer responsive {
  @media(min-width:1700px){.workspace{grid-template-columns:290px minmax(440px,1fr) 380px}.learning-main{padding-left:70px;padding-right:70px}.tutor-intro,.tutor-context{font-size:.8rem}.chat-message .message-body{font-size:.9rem}}
  @media(max-width:1180px){.workspace{grid-template-columns:225px minmax(340px,1fr) 290px}.topbar{padding:0 23px}.header-caption{display:none}.learning-main{padding:30px 25px}.rail-heading{padding:25px 20px 17px}.course-progress{margin-left:20px;margin-right:20px}.syllabus-group summary{padding:0 20px}.lesson-link{padding-left:22px}.tutor-header{padding:25px 16px 17px;gap:8px}.tutor-header .eyebrow{font-size:.5rem}.tutor-intro{margin-left:16px;margin-right:16px}.tutor-context{padding:11px 16px}.transcript{padding:20px 16px}.tutor-composer{padding-left:12px;padding-right:12px}.assessment-launch{display:block}.assessment-launch button{margin-top:18px}.lesson-meta{font-size:.62rem}.lesson-masthead h1{font-size:2.5rem}}
  @media(max-width:980px){.workspace{grid-template-columns:230px minmax(0,1fr)}.tutor{grid-column:2;position:relative;height:650px;border-top:1px solid var(--line);margin:0 25px 30px;border-right:1px solid var(--line);border-radius:4px}.syllabus{grid-row:1 / 3}.learning-main{padding:30px 35px}.account>span{max-width:180px}.lesson-masthead h1{font-size:2.7rem}.assessment-launch{display:flex}.assessment-launch button{margin:0}.auth-screen{gap:7%;padding:8% 5%}.signin-card{padding:32px}}
  @media(max-width:680px){.topbar{height:65px;padding:0 17px;gap:10px}.brand{gap:9px;font-size:.95rem}.brand b{font-size:.51rem;margin-left:2px}.brand-mark{height:28px;width:28px;font-size:21px}.account{gap:12px}.account>span{display:none}.account .text-button{font-size:.65rem}.workspace{display:block}.syllabus{position:relative;min-height:0;max-height:none}.rail-heading{padding:18px 23px}.rail-heading .eyebrow{font-size:.56rem;margin-bottom:5px}.rail-toggle{font-size:1.4rem}.rail-toggle span{display:inline}.course-progress{margin:0 23px 10px;padding:0 0 18px}.course-progress>div{justify-content:flex-start;gap:12px}.resume-button{max-width:230px}.course-progress progress{margin:10px 0 15px}#syllabus-body{max-height:65vh;overflow:auto}.rail-footnote{padding-bottom:20px}.learning-main{padding:25px 24px}.lesson-masthead h1{font-size:2.7rem}.lesson-masthead>.eyebrow{font-size:.58rem;line-height:1.8;margin-bottom:15px}.lesson-meta{font-size:.6rem;flex-wrap:wrap;gap:7px}.lesson-section .section-body{font-size:1.04rem;line-height:1.9}.lesson-section h2{font-size:1.8rem}.section-nav{gap:6px}.section-nav button{font-size:.64rem}.assessment-launch{display:block}.assessment-launch button{margin-top:18px;width:100%}.quiz-panel{padding:22px 17px}.tutor{height:650px;min-height:0;margin:0 24px 30px}.tutor-header{padding:22px}.tutor-intro{margin-left:22px;margin-right:22px}.tutor-context{padding-left:22px}.transcript{padding-left:22px;padding-right:22px}.chat-message .message-body{font-size:.9rem}.composer-footer span{font-size:.58rem}.auth-screen{display:block;padding:42px 25px}.welcome-copy h1{font-size:3.6rem}.welcome-copy .eyebrow{font-size:.6rem;margin-bottom:19px}.welcome-deck{font-size:.98rem;max-width:340px}.welcome-rule{margin:23px 0}.welcome-facts{gap:27px;margin-bottom:40px}.signin-card{padding:28px}.signin-card .small-mark{margin-bottom:20px}.signin-card h2{font-size:2.3rem}.invite-input{flex-direction:column}.invite-list li{font-size:.8rem}.panel-heading{display:block}}
  @media(prefers-reduced-motion:reduce){*,*::before,*::after{animation:none!important;transition:none!important;scroll-behavior:auto!important}}
}