:root{--ink:#172033;--muted:#657087;--line:#dfe4ec;--paper:#f7f8fb;--white:#fff;--blue:#3157a4;--blue-deep:#24417b;--blue-soft:#e9eef9;--coral:#e36c4d;--coral-soft:#fff0ea;--green:#2f7d65;--display:"Onest", "IBM Plex Sans", Arial, sans-serif;--body:"IBM Plex Sans", Arial, sans-serif;--mono:"IBM Plex Mono", monospace;color:var(--ink);font-family:var(--body);font-synthesis:none;text-rendering:optimizelegibility}*{box-sizing:border-box}html{scroll-behavior:smooth}body{background:var(--paper);color:var(--ink);margin:0}button,input,textarea{font:inherit}button,a{-webkit-tap-highlight-color:transparent}a,button{color:inherit}:focus-visible{outline-offset:3px;outline:3px solid #3157a459}.wrap{width:min(1180px,100% - 48px);margin-inline:auto}.brand{color:var(--ink);font-family:var(--display);letter-spacing:-.025em;align-items:center;gap:11px;font-size:18px;font-weight:650;text-decoration:none;display:inline-flex}.brand-mark{border:1px solid var(--ink);background:var(--white);grid-template-columns:1fr 1fr;width:34px;height:34px;display:grid;position:relative;overflow:hidden}.brand-mark i{font-family:var(--mono);place-items:center;font-size:10px;font-style:normal;font-weight:500;display:grid}.brand-mark i:first-child{color:var(--white);background:var(--blue)}.brand-mark i:last-child{align-self:end;padding-bottom:4px}.brand.compact{font-size:16px}.brand.compact .brand-mark{width:30px;height:30px}.button{border:1px solid var(--blue);background:var(--blue);color:#fff;cursor:pointer;border-radius:6px;justify-content:center;align-items:center;min-height:50px;padding:0 22px;font-weight:600;text-decoration:none;transition:background .16s,border-color .16s,transform .16s;display:inline-flex}.button:hover{border-color:var(--blue-deep);background:var(--blue-deep);transform:translateY(-1px)}.button:disabled{cursor:wait;opacity:.58;transform:none}.button-small{min-height:38px;padding-inline:16px;font-size:14px}.button-secondary{border-color:var(--line);background:var(--white);color:var(--ink)}.button-secondary:hover{background:#f9fafc;border-color:#c9d0dc}.button-full{width:100%}.kicker{color:var(--blue);font-family:var(--mono);letter-spacing:.11em;text-transform:uppercase;margin:0 0 18px;font-size:11px;font-weight:500}.landing-header{justify-content:space-between;align-items:center;height:88px;display:flex}.landing-header nav{align-items:center;gap:30px;display:flex}.landing-header nav>a:not(.button){color:#4f5b70;font-size:14px;text-decoration:none}.landing-header nav>a:not(.button):hover{color:var(--blue)}.hero{grid-template-columns:.92fr 1.08fr;align-items:center;gap:84px;min-height:660px;padding-block:68px 86px;display:grid}.hero-copy h1{max-width:680px;font-family:var(--display);letter-spacing:-.052em;margin:0;font-size:clamp(54px,6vw,82px);font-weight:600;line-height:1.03}.hero-copy h1 span{color:var(--blue)}.hero-lead{color:#4e5a70;max-width:560px;margin:30px 0;font-size:19px;line-height:1.62}.hero-actions{align-items:center;gap:20px;display:flex}.hero-actions span{color:var(--muted);font-size:13px}.lesson-window{background:var(--white);border:1px solid #cfd6e2;border-radius:8px;position:relative;box-shadow:0 28px 70px #21304f1f}.lesson-window:before{z-index:-1;content:"";border:1px solid #bdc7d7;border-left:0;width:46%;position:absolute;top:24px;bottom:-24px;right:-22px}.lesson-window-head{border-bottom:1px solid var(--line);color:#455167;justify-content:space-between;align-items:center;height:62px;padding-inline:22px;font-size:13px;font-weight:600;display:flex}.status-dot,.pulse-dot{background:var(--green);border-radius:50%;width:7px;height:7px;margin-right:9px;display:inline-block}.lesson-time{font-family:var(--mono);font-weight:500}.lesson-thread{min-height:390px;padding:30px 28px 16px 50px}.coach-note{max-width:82%;margin-bottom:26px;position:relative}.coach-note:before{content:"";background:#bdc9dc;width:1px;position:absolute;top:1px;bottom:0;left:-21px}.speaker{color:var(--blue);font-family:var(--mono);letter-spacing:.1em;text-transform:uppercase;font-size:10px}.coach-note p,.learner-note p{margin:7px 0 0;line-height:1.55}.learner-note{background:var(--blue-soft);border-radius:6px 6px 0;width:76%;margin:0 0 28px auto;padding:14px 17px;font-size:14px}.annotated{padding-right:90px}.margin-note{border-left:2px solid var(--coral);color:#7c5148;font-family:var(--mono);text-transform:uppercase;padding-left:10px;font-size:9px;line-height:1.7;position:absolute;top:4px;right:-92px}.margin-note strong{color:var(--coral);font-weight:500}.lesson-composer{color:#8992a3;border:1px solid #d5dbe5;border-radius:6px;justify-content:space-between;align-items:center;min-height:58px;margin:0 18px 18px;padding:0 10px 0 17px;font-size:13px;display:flex}.lesson-composer i{background:var(--blue);color:#fff;border-radius:4px;place-items:center;width:36px;height:36px;font-style:normal;display:grid}.exam-shift{border-block:1px solid var(--line);background:var(--white)}.exam-shift-grid{grid-template-columns:.82fr 1.18fr;gap:96px;padding-block:104px;display:grid}.exam-shift-heading h2{max-width:480px;font-family:var(--display);letter-spacing:-.045em;margin:0;font-size:clamp(38px,4.4vw,58px);font-weight:600;line-height:1.08}.exam-shift-copy{color:#526077;font-size:16px;line-height:1.72}.exam-shift-copy>p{margin:0}.exam-shift-copy .exam-shift-lead{color:#303d54;font-size:18px;line-height:1.68}.exam-path{border-block:1px solid #c9d2df;grid-template-columns:repeat(3,1fr);margin-block:38px;display:grid}.exam-path div{padding:23px 26px 23px 0;position:relative}.exam-path div+div{border-left:1px solid var(--line);padding-left:26px}.exam-path div:not(:last-child):after{z-index:1;color:var(--coral);content:"→";font-family:var(--mono);font-size:12px;position:absolute;top:22px;right:-5px}.exam-path span{color:var(--blue);font-family:var(--mono);letter-spacing:.08em;text-transform:uppercase;font-size:10px;font-weight:500}.exam-path p{color:#4c596f;margin:11px 0 0;font-size:13px;line-height:1.55}.exam-source-note{color:#7b8494;font-size:11px;line-height:1.6;margin-top:23px!important}.exam-source-note a{color:var(--blue);text-underline-offset:2px}.exam-source-note a:hover{color:var(--blue-deep)}.principle-strip{border-block:1px solid var(--line);background:var(--white)}.principle-grid{grid-template-columns:repeat(3,1fr);display:grid}.principle-grid p{border-right:1px solid var(--line);color:#3f4b60;margin:0;padding:23px 34px;font-size:14px}.principle-grid p:first-child{border-left:1px solid var(--line)}.principle-grid span{color:var(--blue);font-family:var(--mono);margin-right:18px;font-size:10px}.section{padding-block:120px}.section-heading{grid-template-columns:.8fr 1.2fr;align-items:start;margin-bottom:64px;display:grid}.section-heading .kicker{padding-top:10px}.section-heading h2,.course-grid h2{font-family:var(--display);letter-spacing:-.05em;margin:0;font-size:clamp(38px,4.8vw,62px);font-weight:580;font-stretch:82%;line-height:1.06}.study-loop{border-top:1px solid #bdc7d6;grid-template-columns:repeat(3,1fr);display:grid}.study-loop article{border-right:1px solid var(--line);min-height:260px;padding:32px 38px 24px 0}.study-loop article+article{padding-left:38px}.study-loop article:last-child{border:0}.study-loop article>span{color:var(--coral);font-family:var(--mono);text-transform:uppercase;font-size:11px}.study-loop h3{font-family:var(--display);letter-spacing:-.03em;margin:38px 0 14px;font-size:24px;font-weight:600}.study-loop p{color:var(--muted);margin:0;font-size:15px;line-height:1.7}.course-section{border-block:1px solid var(--line);background:var(--blue-soft)}.landing-courses{padding-block:94px}.landing-courses-heading{grid-template-columns:1fr .62fr;align-items:end;gap:80px;margin-bottom:52px;display:grid}.landing-courses-heading h2{font-family:var(--display);letter-spacing:-.05em;margin:0;font-size:clamp(42px,5vw,64px);font-weight:600;line-height:1.04}.landing-courses-heading>p{color:#5b687e;margin:0 0 7px;font-size:15px;line-height:1.7}.landing-course-list{gap:14px;display:grid}.landing-course-card{background:#ffffffc7;border:1px solid #c7d1df;grid-template-columns:74px minmax(0,1fr) 190px;align-items:center;gap:28px;padding:28px 30px;display:grid}.landing-course-artwork{background:#fff;border:1px solid #c6d0de;border-radius:12px;place-items:center;width:72px;height:72px;display:grid;position:relative;overflow:hidden}.landing-course-artwork img{object-fit:contain;width:100%;height:100%}.landing-course-artwork strong{color:var(--blue);font-family:var(--mono);font-size:16px}.landing-course-index{z-index:1;color:#7a879b;font-family:var(--mono);font-size:7px;position:absolute;top:5px;left:6px}.landing-course-card small{color:var(--blue);font-family:var(--mono);letter-spacing:.08em;text-transform:uppercase;font-size:9px}.landing-course-card h3{max-width:720px;font-family:var(--display);letter-spacing:-.035em;margin:8px 0;font-size:27px;font-weight:600}.landing-course-card p{color:#657087;max-width:720px;margin:0;font-size:12px;line-height:1.6}.landing-course-footer{justify-items:end;gap:14px;display:grid}.landing-course-footer>span{color:#748095;font-family:var(--mono);font-size:9px}.landing-course-brief{border-top:1px solid #cbd4e1;grid-column:2/-1;grid-template-columns:150px minmax(0,720px);gap:28px;margin-top:4px;padding-top:28px;display:grid}.landing-course-brief>span{color:var(--blue);font-family:var(--mono);letter-spacing:.09em;text-transform:uppercase;padding-top:4px;font-size:9px;font-weight:500}.course-markdown{border-left:2px solid var(--blue);color:#4e5c72;padding-left:24px}.course-markdown>:first-child{margin-top:0}.course-markdown>:last-child{margin-bottom:0}.course-markdown h4,.course-markdown h5{color:#26334a;font-family:var(--display);letter-spacing:-.025em;margin:0 0 14px;font-size:20px;font-weight:600;line-height:1.25}.course-markdown h5{font-size:16px}.landing-course-card .course-markdown p,.course-markdown li{color:#536078;margin:0 0 12px;font-size:13px;line-height:1.72}.course-markdown ul{margin:14px 0;padding-left:18px}.course-markdown strong{color:#303d54}.course-markdown code{color:#34466d;font-family:var(--mono);background:#edf1f7;border-radius:3px;padding:2px 4px;font-size:.88em}.course-markdown a{color:var(--blue);text-underline-offset:2px}.loading-course{color:#7a8495;font-family:var(--mono);font-size:10px;display:block}.landing-course-error{color:#8b493c;margin:0;font-size:13px}.course-grid{grid-template-columns:1fr .8fr auto;align-items:center;gap:72px;padding-block:84px;display:grid}.course-grid>div:first-child>p:last-child{color:#58647a;max-width:510px;font-size:16px;line-height:1.65}.course-facts{border-left:1px solid #c9d2e2;padding-left:42px}.course-facts p{border-bottom:1px solid #ccd4e2;justify-content:space-between;gap:28px;margin:0;padding:12px 0;font-size:13px;display:flex}.course-facts span{color:var(--muted)}.course-facts strong{font-weight:600}.landing-footer{min-height:116px;color:var(--muted);justify-content:space-between;align-items:center;font-size:12px;display:flex}.auth-page{background:var(--white);min-height:100vh}.auth-shell{background-image:linear-gradient(90deg,#0000 0 calc(50% - 241px),#eef1f5 calc(50% - 241px) calc(50% - 240px),#0000 calc(50% - 240px) calc(50% + 240px),#eef1f5 calc(50% + 240px) calc(50% + 241px),#0000 calc(50% + 241px));grid-template-rows:120px 1fr 100px;grid-template-columns:1fr minmax(380px,480px) 1fr;min-height:100vh;padding:0 48px;display:grid}.auth-brand{grid-column:1/-1;padding-top:35px}.auth-card{grid-column:2;align-self:center;padding:42px 46px 50px}.auth-card h1{font-family:var(--display);letter-spacing:-.05em;margin:0;font-size:42px;font-weight:610;font-stretch:82%}.auth-intro{color:var(--muted);margin:13px 0 34px;line-height:1.6}.preview-notice{border-left:3px solid var(--coral);background:var(--coral-soft);color:#77483f;margin:-12px 0 26px;padding:11px 14px;font-size:12px;line-height:1.55}.auth-card form{gap:14px;display:grid}.auth-card label{font-size:13px;font-weight:600}.auth-card input{width:100%;height:52px;color:var(--ink);background:#fbfcfd;border:1px solid #cdd4df;border-radius:5px;outline:0;padding-inline:15px}.auth-card input:focus{border-color:var(--blue);box-shadow:0 0 0 3px #3157a41f}.auth-card .code-input{height:62px;font-family:var(--mono);letter-spacing:.25em;text-align:center;font-size:28px}.back-link,.text-button{width:fit-content;color:var(--blue);cursor:pointer;background:0 0;border:0;padding:0;font-size:13px}.back-link{margin-bottom:12px}.text-button{justify-self:center;margin-top:5px}.form-message{min-height:20px;color:var(--muted);text-align:center;margin:18px 0 0;font-size:13px}.form-message.error{color:#a34032}.form-message.success{color:var(--green)}.auth-terms{color:#8a93a3;text-align:center;margin:28px 0 0;font-size:11px}.auth-aside{color:var(--muted);font-family:var(--mono);letter-spacing:.04em;text-align:center;text-transform:uppercase;grid-column:2;align-self:end;margin:0 0 34px;font-size:10px}.study-page{background:#f8f9fb;height:100vh;overflow:hidden}.study-shell{grid-template-columns:250px minmax(480px,1fr) 260px;height:100vh;display:grid}.study-shell.auth-pending{visibility:hidden}.study-sidebar{border-right:1px solid var(--line);background:#f2f4f8;flex-direction:column;min-width:0;padding:20px 14px;display:flex}.sidebar-brand{padding:0 8px 22px}.new-session{background:var(--white);cursor:pointer;text-align:left;border:1px solid #cfd6e1;border-radius:5px;align-items:center;gap:11px;height:42px;padding:0 12px;font-size:13px;font-weight:500;display:flex}.new-session:hover{border-color:#aeb9ca}.new-session span{color:var(--blue);font-size:18px}.session-nav{flex:1;min-height:0;padding-top:24px;overflow-y:auto}.session-nav p{color:#8a93a2;font-family:var(--mono);letter-spacing:.08em;text-transform:uppercase;margin:13px 9px 6px;font-size:9px}.session-nav button,.sidebar-bottom button,.sidebar-admin-link{color:#536076;cursor:pointer;text-align:left;white-space:nowrap;text-overflow:ellipsis;background:0 0;border:0;border-radius:4px;width:100%;padding:9px 10px;font-size:12px;text-decoration:none;overflow:hidden}.session-nav button:hover,.sidebar-bottom button:hover,.sidebar-admin-link:hover{color:var(--ink);background:#e7eaf0}.session-nav button.active{color:var(--ink);background:#e3e7ef;font-weight:500}.sidebar-bottom{border-top:1px solid #d9dee6;padding-top:10px}.sidebar-bottom button,.sidebar-admin-link{gap:10px;display:flex}.sidebar-admin-link[hidden]{display:none}.sidebar-bottom form{margin:0}.account-email{color:#8a93a3;text-overflow:ellipsis;margin:8px 10px 0;font-size:10px;overflow:hidden}.study-main{background:var(--white);grid-template-rows:68px 1fr auto;min-width:0;min-height:0;display:grid}.study-header{border-bottom:1px solid #edf0f4;justify-content:space-between;align-items:center;padding:0 24px;display:flex}.course-label{color:#8993a3;font-family:var(--mono);letter-spacing:.1em;text-transform:uppercase;margin-bottom:1px;font-size:8px;display:block}.course-select{cursor:pointer;background:0 0;border:0;align-items:center;padding:0;font-size:14px;font-weight:600;text-decoration:none;display:inline-flex}.study-course-icon{width:25px;height:25px;color:var(--blue);font-family:var(--mono);background:#fff;border:1px solid #d0d8e3;border-radius:5px;place-items:center;margin-right:8px;font-size:7px;display:grid;overflow:hidden}.study-course-icon img{object-fit:contain;width:100%;height:100%}.course-select i{color:var(--muted);margin-left:4px;font-style:normal}.header-actions{align-items:center;gap:10px;display:flex}.icon-button,.avatar,.mobile-menu{cursor:pointer;background:#fff;border:1px solid #d8dee7;place-items:center;display:grid}.icon-button{color:#657087;border-radius:4px;width:32px;height:32px}.avatar{background:var(--blue);color:#fff;border:0;border-radius:50%;width:32px;height:32px;font-size:12px;font-weight:600}.mobile-menu{border-radius:4px;width:32px;height:32px;display:none}.conversation{min-height:0;overflow-y:auto}.conversation-inner{width:min(760px,100% - 48px);margin:0 auto;padding:28px 0 60px}.date-divider{color:#929baa;font-family:var(--mono);letter-spacing:.08em;text-transform:uppercase;align-items:center;gap:12px;margin-bottom:34px;font-size:9px;display:flex}.date-divider:before,.date-divider:after{content:"";background:#edf0f3;flex:1;height:1px}.coach-message{grid-template-columns:36px 1fr;gap:16px;display:grid}.coach-avatar{border:1px solid var(--ink);background:linear-gradient(135deg, var(--blue) 0 50%, white 50%);color:#fff;width:34px;height:34px;font-family:var(--mono);text-shadow:10px 10px 0 var(--ink);place-items:center;font-size:8px;display:grid}.message-author{color:#7b8595;font-family:var(--mono);letter-spacing:.07em;text-transform:uppercase;margin:0 0 12px!important;font-size:9px!important}.agent-wait{color:#637188;align-items:center;gap:10px;width:fit-content;margin:1px 0 11px;display:flex}.agent-wait-signal{background:#dce3ed;width:42px;height:2px;position:relative;overflow:hidden}.agent-wait-signal:after{background:var(--blue);content:"";width:14px;height:100%;animation:1.15s cubic-bezier(.45,0,.55,1) infinite coach-signal;position:absolute}.agent-wait-label{font-family:var(--mono);letter-spacing:.02em;font-size:9px}@keyframes coach-signal{0%{transform:translate(-14px)}50%{transform:translate(42px)}to{transform:translate(-14px)}}.message-body h1{font-family:var(--display);letter-spacing:-.04em;margin:0 0 12px;font-size:30px;font-weight:600;font-stretch:82%}.message-body>p:not(.message-author){color:#536076;max-width:620px;margin:0;font-size:14px;line-height:1.68}.assistant-markdown{color:#536076;overflow-wrap:anywhere;max-width:650px;font-size:14px;line-height:1.72}.assistant-markdown>:first-child{margin-top:0}.assistant-markdown>:last-child{margin-bottom:0}.assistant-markdown p{margin:0 0 13px}.assistant-markdown h2,.assistant-markdown h3,.assistant-markdown h4{color:#26334a;font-family:var(--display);letter-spacing:-.02em;margin:24px 0 9px;font-weight:600;line-height:1.3}.assistant-markdown h2{font-size:20px}.assistant-markdown h3{font-size:17px}.assistant-markdown h4{font-size:15px}.assistant-markdown strong{color:#29374d;font-weight:650}.assistant-markdown ul,.assistant-markdown ol{margin:9px 0 16px;padding-left:22px}.assistant-markdown li{margin:6px 0;padding-left:3px}.assistant-markdown li::marker{color:var(--blue)}.assistant-markdown blockquote{color:#68758a;border-left:2px solid #aebbd0;margin:16px 0;padding:2px 0 2px 15px}.assistant-markdown blockquote p{margin:0}.assistant-markdown code{color:#34466d;font-family:var(--mono);background:#edf1f7;border-radius:3px;padding:2px 4px;font-size:.88em}.assistant-markdown pre{background:#f5f7fa;border:1px solid #dbe1ea;border-radius:5px;max-width:100%;margin:16px 0;padding:13px 15px;overflow-x:auto}.assistant-markdown pre code{background:0 0;padding:0}.assistant-markdown a{color:#315f9e;text-underline-offset:3px;text-decoration-thickness:1px}.assistant-markdown a:hover{color:#204b85}.assistant-markdown hr{border:0;border-top:1px solid #e3e7ed;margin:22px 0}.assistant-markdown table{border-collapse:collapse;max-width:100%;margin:16px 0;font-size:12px;display:block;overflow-x:auto}.assistant-markdown th,.assistant-markdown td{text-align:left;vertical-align:top;border:1px solid #dfe4ec;padding:7px 9px}.assistant-markdown th{color:#35435a;background:#f5f7fa;font-weight:600}.tool-trace{color:#68758a;background:#f8f9fb;border:1px solid #e0e5ed;border-radius:4px;max-width:650px;margin:0 0 9px;font-size:11px}.tool-trace summary{cursor:pointer;font-family:var(--mono);letter-spacing:.01em;align-items:baseline;gap:7px;padding:8px 10px;font-size:9px;line-height:1.55;display:flex}.tool-trace summary:before{color:var(--blue);content:"SEARCH";letter-spacing:.08em;flex:none;font-size:7px;font-weight:600}.tool-trace[data-tool=update_memory] summary:before{color:var(--green);content:"MEMORY"}.tool-trace[data-tool=generate_diagram] summary:before{color:#765f24;content:"DIAGRAM"}.tool-trace[data-status=failed] summary:before{color:#a34032}.tool-trace-detail{border-top:1px solid #e3e7ed;padding:9px 12px 10px;line-height:1.55}.tool-trace-detail p{margin:0 0 7px}.tool-trace-detail p:last-child{margin-bottom:0}.tool-trace-scope{color:#536178;font-family:var(--mono);font-size:9px}.tool-trace-detail ul{margin:0;padding-left:17px}.tool-trace-detail li{overflow-wrap:anywhere;margin:4px 0}.tool-memory-content{white-space:pre-wrap;max-height:150px;overflow-y:auto}.tool-diagram-error{color:#874438;max-height:180px;font-family:var(--mono);white-space:pre-wrap;background:snow;border:1px solid #ead8d4;border-radius:3px;margin:8px 0 0;padding:9px 10px;font-size:9px;overflow:auto}.tool-diagram-source{color:#526078;max-height:180px;font-family:var(--mono);white-space:pre-wrap;background:#fff;border:1px solid #dfe4eb;border-radius:3px;margin:8px 0 0;padding:9px 10px;font-size:9px;overflow:auto}.coach-diagram{background:#fff;border:1px solid #d8dee8;border-radius:5px;max-width:650px;margin:0 0 18px;overflow:hidden}.coach-diagram figcaption{background:#f8f9fb;border-bottom:1px solid #e4e8ee;justify-content:space-between;align-items:center;gap:16px;padding:9px 10px 9px 12px;display:flex}.coach-diagram figcaption strong{color:#344158;font-family:var(--display);font-size:12px;font-weight:600}.coach-diagram-meta,.coach-diagram-controls{align-items:center;display:flex}.coach-diagram-meta{gap:10px}.coach-diagram-type{color:#8893a4;font-family:var(--mono);letter-spacing:.06em;text-transform:uppercase;font-size:8px}.coach-diagram-controls{background:#fff;border:1px solid #d8dee7;border-radius:3px;overflow:hidden}.coach-diagram-controls button,.coach-diagram-controls output{color:#5d6a80;min-width:27px;height:26px;font-family:var(--mono);background:0 0;border:0;border-right:1px solid #e1e5eb;place-items:center;padding:0 7px;font-size:9px;display:grid}.coach-diagram-controls button{cursor:pointer}.coach-diagram-controls button:last-child{border-right:0}.coach-diagram-controls button:hover{color:#29384f;background:#eef2f7}.coach-diagram-controls button:focus-visible,.coach-diagram-canvas:focus-visible{outline-offset:-2px;outline:2px solid #5f7dac}.coach-diagram-controls button:disabled{color:#b5bcc7;cursor:default}.coach-diagram-controls output{color:#738096;min-width:42px}.coach-diagram-canvas{color:#68758a;cursor:grab;text-align:center;touch-action:pan-y;user-select:none;place-items:center;min-height:160px;padding:22px 18px;display:grid;position:relative;overflow:hidden}.coach-diagram-canvas.is-dragging{cursor:grabbing}.coach-diagram-canvas>p{font-family:var(--mono);margin:26px 0;font-size:9px}.coach-diagram-stage{place-items:center;width:100%;display:grid}.coach-diagram-canvas svg{width:auto;margin:0 auto;display:block}.coach-diagram-help{color:#8c96a5;font-family:var(--mono);text-align:center;background:#fbfcfd;border-top:1px solid #edf0f3;margin:0;padding:7px 10px;font-size:8px}.coach-diagram:fullscreen,.coach-diagram.is-expanded{background:#fff;border:0;border-radius:0;flex-direction:column;width:100vw;max-width:none;height:100vh;margin:0;display:flex}.coach-diagram.is-expanded{z-index:1000;position:fixed;inset:0}.coach-diagram:fullscreen .coach-diagram-canvas,.coach-diagram.is-expanded .coach-diagram-canvas{touch-action:none;flex:1;min-height:0}.prompt-grid{grid-template-columns:repeat(3,1fr);gap:10px;margin-top:28px;display:grid}.prompt-grid button{cursor:pointer;text-align:left;background:#fff;border:1px solid #dce1e9;border-radius:5px;min-height:126px;padding:15px;transition:border-color .14s,transform .14s}.prompt-grid button:hover{border-color:#aab7cc;transform:translateY(-2px)}.prompt-grid span{color:var(--blue);font-family:var(--mono);text-transform:uppercase;margin-bottom:26px;font-size:9px;display:block}.prompt-grid strong{font-family:var(--display);margin-bottom:4px;font-size:14px;font-weight:600;display:block}.prompt-grid small{color:#8a93a3;font-size:10px}.learner-message{background:var(--blue-soft);color:#34445f;border-radius:7px 7px 0;width:fit-content;max-width:70%;margin:30px 0 30px auto;padding:12px 15px;font-size:14px;line-height:1.55}.learner-message p{margin:0}.compact-message{margin-block:30px}.composer-area{background:#fffffff5;border-top:1px solid #edf0f3;padding:13px 24px 9px}.composer{background:#fff;border:1px solid #cad2df;border-radius:7px;width:min(760px,100%);margin:0 auto;padding:10px 10px 8px 14px;box-shadow:0 8px 28px #1e2b460f}.composer textarea{resize:none;width:100%;max-height:130px;color:var(--ink);border:0;outline:0;padding:3px 0 8px;font-size:14px;line-height:1.5;display:block}.composer textarea::placeholder{color:#949dac}.composer-tools{align-items:center;gap:9px;display:flex}.composer-tools>span{color:#929baa;font-size:9px}.attach-button,.send-button{cursor:pointer;border:0;border-radius:4px;place-items:center;display:grid}.attach-button{color:#667187;background:#f1f3f6;width:27px;height:27px;font-size:18px}.send-button{background:var(--blue);color:#fff;width:30px;height:30px;margin-left:auto;font-size:18px}.composer-note{color:#9aa2af;text-align:center;margin:7px 0 0;font-size:9px}.study-margin{border-left:1px solid var(--line);background:#f8f9fb;flex-direction:column;min-width:0;padding:22px 18px 18px;display:flex}.timer-card{border:1px solid #d7dde7;border-top:3px solid var(--blue);background:#fff;border-radius:4px;padding:18px}.timer-heading{color:#536075;font-family:var(--mono);letter-spacing:.07em;text-transform:uppercase;font-size:9px}.timer-card>strong{font-family:var(--mono);letter-spacing:-.06em;margin:15px 0 2px;font-size:34px;font-weight:500;display:block}.timer-card>p{color:#778195;margin:0;font-size:11px}.time-track{background:#e7eaf0;height:3px;margin:16px 0 10px;overflow:hidden}.time-track i{background:var(--coral);width:0;height:100%;transition:width .5s linear;display:block}.timer-card small{color:#8a93a3;font-size:9px}.timer-paused .pulse-dot{background:#a1a8b3}.timer-paused .timer-card{border-top-color:#a1a8b3}.trial-ended .timer-card{border-top-color:var(--coral)}.margin-section{border-bottom:1px solid #dfe3e9;padding:24px 5px 20px}.margin-label{color:#8a93a3;font-family:var(--mono);letter-spacing:.08em;text-transform:uppercase;margin:0 0 14px;font-size:9px}.session-stat{color:#667186;justify-content:space-between;margin-top:9px;font-size:11px;display:flex}.session-stat strong{color:var(--ink);font-family:var(--mono);font-weight:500}.focus-section>p:last-child{color:#69758a;margin:0;font-size:11px;line-height:1.6}.upgrade-button{background:var(--coral-soft);color:#793f32;cursor:pointer;text-align:left;border:0;border-radius:5px;margin-top:auto;padding:15px}.upgrade-button span{margin-bottom:5px;font-size:10px;display:block}.upgrade-button strong{color:#b44d37;font-size:12px}.upgrade-dialog{width:min(440px,100% - 32px);color:var(--ink);border:1px solid #ccd3df;border-radius:8px;padding:40px;box-shadow:0 30px 100px #17203340}.upgrade-dialog::backdrop{backdrop-filter:blur(2px);background:#17203359}.upgrade-dialog h2{font-family:var(--display);letter-spacing:-.045em;margin:0 0 14px;font-size:34px;font-weight:600;font-stretch:82%}.upgrade-dialog>p:not(.kicker){color:var(--muted);line-height:1.6}.dialog-close{color:var(--muted);cursor:pointer;background:0 0;border:0;font-size:24px;position:absolute;top:14px;right:14px}.dialog-actions{gap:17px;margin-top:28px;display:grid}@media (width<=1100px){.hero{gap:42px}.study-shell{grid-template-columns:220px minmax(430px,1fr)}.study-margin{display:none}.course-grid{grid-template-columns:1fr 1fr}.course-grid>.button{grid-column:2;width:fit-content}}@media (width<=820px){.wrap{width:min(100% - 32px,680px)}.landing-header{height:72px}.landing-header nav>a:not(.button){display:none}.hero{grid-template-columns:1fr;gap:56px;padding-block:64px 80px}.hero-copy h1{font-size:clamp(50px,13vw,74px)}.exam-shift-grid{grid-template-columns:1fr;gap:38px;padding-block:82px}.lesson-window{width:calc(100% - 18px)}.principle-grid{grid-template-columns:1fr}.principle-grid p{border-right:1px solid var(--line);border-bottom:1px solid var(--line)}.principle-grid p:last-child{border-bottom:0}.section{padding-block:86px}.section-heading{grid-template-columns:1fr;gap:14px;margin-bottom:48px}.study-loop{grid-template-columns:1fr}.study-loop article,.study-loop article+article{border-right:0;border-bottom:1px solid var(--line);min-height:auto;padding:30px 0}.study-loop h3{margin-top:20px}.course-grid{grid-template-columns:1fr;gap:32px}.landing-courses-heading{grid-template-columns:1fr;gap:24px}.landing-course-card{grid-template-columns:74px 1fr}.landing-course-footer{grid-column:2;grid-template-columns:1fr auto;place-items:center start}.landing-course-brief{grid-column:1/-1;grid-template-columns:120px 1fr}.course-grid>.button{grid-column:1}.course-facts{border-left:0;padding-left:0}.landing-footer{flex-wrap:wrap;gap:16px;padding-block:28px}.landing-footer>p:nth-child(2){display:none}.auth-shell{background-image:none;grid-template-columns:1fr;padding:0 20px}.auth-card,.auth-aside{grid-column:1}.auth-card{justify-self:center;width:min(100%,480px);padding-inline:20px}.study-shell{display:block}.study-sidebar{z-index:10;width:250px;transition:transform .18s;position:fixed;inset:0 auto 0 0;transform:translate(-102%);box-shadow:20px 0 40px #1c273e26}.study-sidebar.open{transform:translate(0)}.study-main{height:100vh}.mobile-menu{margin-right:12px;display:grid}.study-header>div:first-of-type{margin-right:auto}.prompt-grid{grid-template-columns:1fr}.prompt-grid button{min-height:92px}.prompt-grid span{margin-bottom:15px}}@media (width<=520px){.hero-actions{flex-direction:column;align-items:flex-start}.hero-copy h1{font-size:48px}.exam-path{grid-template-columns:1fr}.exam-path div,.exam-path div+div{border-left:0;border-bottom:1px solid var(--line);padding:20px 0}.exam-path div:last-child{border-bottom:0}.exam-path div:not(:last-child):after{top:auto;bottom:-7px;right:2px;transform:rotate(90deg)}.lesson-thread{padding-left:38px}.annotated{padding-right:0}.margin-note{display:none}.auth-shell{grid-template-rows:90px 1fr 70px}.auth-card{padding:20px 0 30px}.conversation-inner{width:calc(100% - 28px);padding-top:20px}.study-header{padding-inline:14px}.icon-button{display:none}.composer-area{padding-inline:10px}.message-body h1{font-size:26px}.learner-message{max-width:88%}.coach-diagram-canvas{padding:16px 10px}.coach-diagram figcaption{flex-direction:column;align-items:flex-start}.coach-diagram-meta{justify-content:space-between;width:100%}.coach-diagram-type{display:none}.upgrade-dialog{padding:34px 24px 28px}.landing-course-card{grid-template-columns:1fr;gap:18px;padding:24px 20px}.landing-course-index{display:none}.landing-course-footer{grid-column:1;grid-template-columns:1fr}.landing-course-brief{grid-template-columns:1fr;gap:12px;padding-top:22px}.course-markdown{padding-left:17px}}@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,:before,:after{scroll-behavior:auto!important;transition-duration:.01ms!important;animation-duration:.01ms!important;animation-iteration-count:1!important}.agent-wait-signal:after{width:100%;transform:none}}