@font-face{font-family:Academy;src:url('/fonts/Roboto-Regular.woff2') format('woff2');font-weight:400;font-display:swap}
@font-face{font-family:Academy;src:url('/fonts/Roboto-Medium.woff2') format('woff2');font-weight:500 800;font-display:swap}
:root{--ink:#212121;--muted:#6b6b6b;--purple:#6440bf;--purple-dark:#4c3191;--navy:#3b175c;--lavender:#ebe6f7;--line:#e7e4ec;--bg:#f4f2f0;--white:#fff;--green:#34735d;--radius:20px;--shadow:0 6px 25px #25213705;color-scheme:light}
*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--ink);font-family:Academy,'Segoe UI',Arial,sans-serif;font-size:15px;line-height:1.55}button,input,textarea,select{font:inherit}button,a,input,textarea,select{-webkit-tap-highlight-color:transparent}button,a{touch-action:manipulation}button{cursor:pointer}a{color:inherit;text-decoration:none}button:disabled{cursor:not-allowed;opacity:.55}button:focus-visible,a:focus-visible,input:focus-visible,textarea:focus-visible,select:focus-visible,summary:focus-visible{outline:3px solid 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13px}.brand-mark{width:30px;height:38px}.brand-name{font-size:24px;font-weight:750;letter-spacing:1px}.brand img{width:159px;height:40px;object-fit:contain}.academy-label{margin:30px 14px 29px;padding-top:23px;border-top:1px solid var(--line);font-size:15px;font-weight:600;color:var(--ink)}.academy-label span{display:block;margin-top:3px;font-size:11px;color:var(--muted);font-weight:400;letter-spacing:.5px}.nav-label{padding:0 15px;margin-bottom:9px;color:#9994aa;font-size:10px;letter-spacing:1.8px}.nav{display:flex;flex-direction:column;gap:6px}.nav-link{display:flex;align-items:center;gap:12px;padding:12px 14px;border-radius:11px;color:#777084;font-size:13px;transition:background .15s,color .15s}.nav-link:hover{background:#f8f6fd;color:var(--purple)}.nav-link.active{background:var(--lavender);color:var(--purple);font-weight:600}.nav-link .nav-dot{margin-left:auto;width:6px;height:6px;background:var(--purple);border-radius:50%}.sidebar-bottom{margin-top:auto;padding-top:30px}.demo-note{margin:12px;padding:15px 0;border-bottom:1px solid var(--line);font-size:11px;line-height:1.6;color:var(--muted)}.profile{display:flex;align-items:center;gap:10px;padding:10px 12px}.avatar{width:35px;height:35px;border-radius:50%;background:#f0edf7;display:grid;place-items:center;color:var(--navy);font-size:12px;font-weight:650}.profile strong{display:block;font-size:12px;font-weight:500}.profile small{color:var(--muted);font-size:10px}.workspace{margin-left:226px;flex:1;min-width:0}.topbar{height:80px;display:flex;align-items:center;justify-content:space-between;padding:0 46px;border-bottom:1px solid var(--line);background:#ffffffb0;gap:12px}.breadcrumbs{font-size:12px;color:var(--muted);display:flex;gap:12px;align-items:center}.breadcrumbs strong{color:var(--ink);font-weight:500}.status-pill{display:flex;align-items:center;gap:7px;font-size:11px;color:var(--muted);white-space:nowrap}.status-dot{width:6px;height:6px;background:#62a388;border-radius:50%}.mobile-brand{display:none}main{padding:38px 46px 36px;max-width:1510px;margin:0 auto}.page-heading{display:flex;justify-content:space-between;align-items:flex-end;gap:20px;margin-bottom:28px}.page-heading .eyebrow{margin-bottom:12px;color:var(--purple)}.page-heading p{margin-top:14px;color:var(--muted);max-width:620px;font-size:14px}.edition{font-size:11px;color:var(--muted);white-space:nowrap;margin-bottom:4px}.btn{display:inline-flex;align-items:center;justify-content:center;gap:10px;min-height:46px;padding:12px 20px;border-radius:9px;font-weight:500;font-size:13px;transition:background .15s,transform .15s}.btn:hover:not(:disabled){transform:translateY(-1px)}.btn.primary{background:var(--purple);color:white;box-shadow:0 4px 9px #6947d715}.btn.primary:hover:not(:disabled){background:var(--purple-dark)}.btn.secondary{background:white;color:var(--purple);border:1px solid var(--line)}.btn.secondary:hover:not(:disabled){background:#f5f1ff}.btn.ghost{background:transparent;color:var(--purple);padding-left:0;box-shadow:none}.btn.compact{min-height:36px;padding:8px 13px;font-size:12px}.btn.wide{width:100%}.chip{display:inline-flex;align-items:center;gap:6px;border-radius:6px;padding:5px 9px;font-size:10px;font-weight:500;background:white;color:var(--purple)}.chip.soft{background:var(--lavender)}.chip.green{background:#edf6f1;color:var(--green)}.chip.outline{border:1px solid #e5ddf8;background:transparent}.home-hero{position:relative;display:grid;grid-template-columns:1.07fr 1fr;background:#efebfa;border-radius:24px;overflow:hidden;min-height:335px;border:1px solid #e8e0f8}.hero-copy{position:relative;padding:34px 38px;z-index:1}.hero-copy h2{font-size:32px;line-height:1.16;letter-spacing:-1px;max-width:380px;margin:21px 0 14px}.hero-copy p{font-size:13px;color:#756886;max-width:370px;line-height:1.7}.hero-actions{display:flex;align-items:center;gap:18px;margin-top:25px}.hero-actions small{font-size:11px;color:#867497}.hero-art{position:relative;min-width:0;display:flex;align-items:center;justify-content:center;background:radial-gradient(ellipse at 70% 50%,#d3bffe80,transparent 68%)}.orbit{position:absolute;border:1px solid #c1ade652;border-radius:50%;width:340px;height:340px;transform:rotate(-24deg) scaleY(.75)}.orbit.second{width:420px;height:420px}.report-illustration{width:246px;background:#fff;border:1px solid #fff;border-radius:16px;transform:rotate(-7deg);padding:23px 23px 25px;box-shadow:12px 16px 35px 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small{display:block;color:var(--muted);font-size:11px;margin-top:2px}.mini-steps{display:flex;gap:5px;flex:1;margin-left:15px}.mini-step{height:5px;background:#edeaf2;border-radius:3px;flex:1}.mini-step.done{background:var(--purple)}.section-heading{display:flex;align-items:center;justify-content:space-between;margin:24px 0 16px}.section-heading h2{font-size:19px}.section-heading span{font-size:11px;color:var(--muted)}.benefits{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px}.benefit{padding:24px;background:white;border:1px solid var(--line);border-radius:15px}.benefit-icon{width:38px;height:38px;border-radius:11px;background:var(--lavender);color:var(--purple);display:grid;place-items:center;margin-bottom:20px}.benefit h3{font-size:14px;margin-bottom:8px}.benefit 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#e9e0f8;border-radius:11px;font-size:12px;color:#776487;display:flex;gap:11px;align-items:flex-start}.note strong{color:#57476c;font-weight:600}.note.success{background:#f1f7f3;border-color:#dfece5;color:var(--green)}.check-label{display:flex;align-items:flex-start;gap:10px;font-size:12px;margin:24px 0 18px;cursor:pointer}.check-label input{accent-color:var(--purple);width:17px;height:17px;margin:1px 0 0;flex-shrink:0}.source-heading{display:flex;align-items:center;gap:11px;margin-bottom:22px}.file-icon{width:36px;height:41px;display:grid;place-items:center;background:var(--lavender);color:var(--purple);border-radius:6px}.source-heading h3{font-size:14px}.source-heading small{display:block;color:var(--muted);font-size:10px;margin-top:3px}.source-meta{display:flex;align-items:center;justify-content:space-between;margin-bottom:14px;font-size:10px;color:var(--muted);gap:10px}.source-table{border-collapse:collapse;width:100%;font-size:12px}.source-table 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h2{font-size:20px;margin-bottom:10px}.verify-panel>p{font-size:12px;color:var(--muted)}.quiz-field{display:flex;justify-content:space-between;align-items:center;gap:20px;padding:14px 0;border-bottom:1px solid #f0edf5;font-size:12px}.quiz-field small{font-size:10px;color:var(--muted);display:block;margin-top:3px}.quiz-field input{width:87px;padding:8px 10px;text-align:right;border-radius:7px;border:1px solid var(--line);background:#fcfbff}.quiz-field select{width:100%;border-radius:8px;border:1px solid var(--line);background:white;padding:11px;margin-top:10px;color:var(--ink);font-size:12px}.quiz-field.stack{display:block;margin-bottom:20px}.final-area{min-height:390px;font-size:12px}.result-hero{padding:35px;display:flex;align-items:center;gap:25px;border:1px solid #e7dff7;border-radius:20px;background:#f0eafa;margin-bottom:24px}.result-icon{display:grid;place-items:center;width:70px;height:70px;background:white;border-radius:50%;color:var(--purple);flex-shrink:0}.result-hero h1{font-size:30px}.result-hero p{margin-top:9px;color:#847294;font-size:13px}.result-layout{display:grid;grid-template-columns:minmax(0,1.5fr) minmax(260px,1fr);gap:22px}.result-summary h2{font-size:19px;margin-bottom:20px}.skill-check{display:flex;gap:10px;align-items:start;font-size:12px;padding:12px 0;color:#7b6b8a}.skill-check svg{color:var(--purple)}.saved-prompt{font-size:12px;white-space:pre-wrap;background:#f9f7fd;border:1px solid var(--line);border-radius:12px;padding:18px;margin:16px 0;line-height:1.8}.spinner{display:inline-block;width:17px;height:17px;border:2px solid #c9b8ee;border-top-color:var(--purple);border-radius:50%;animation:spin .8s linear infinite}.btn.primary .spinner{border-color:#ffffff50;border-top-color:white}.initial-loading{display:flex;gap:15px;align-items:center;justify-content:center;min-height:100vh;color:var(--purple);font-size:14px}#toast{position:fixed;left:calc(50% + 110px);bottom:25px;transform:translateX(-50%);background:var(--navy);color:white;padding:12px 22px;border-radius:10px;box-shadow:0 7px 25px #30255f20;z-index:100;font-size:12px;opacity:0;pointer-events:none;transition:opacity .2s;max-width:80vw}#toast.visible{opacity:1}.fatal{padding:30px;max-width:650px;margin:12vh auto}.loading-caption{margin-top:8px;font-size:11px;color:var(--muted)}@keyframes spin{to{transform:rotate(360deg)}}
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}.editor-title{margin-top:15px}.editor-bottom{margin-top:18px}.lesson-gate{margin:20px 0 25px}.final-help{margin-bottom:18px}.result-empty-btn{margin-top:23px}.bar.b100{height:100%}.bar.b94{height:94%}.bar.b65{height:65%}.bar.b68{height:68%}.bar.b35{height:35%}.bar.b26{height:26%}.bar.b48{height:48%}.bar.b60{height:60%}.btn{border-radius:16px}.prompt-area,.final-area{border-radius:12px}.lab-grid>*,.verify-layout>*,.result-layout>*,.compare-grid>*{min-width:0}.skip-link{top:10px;left:-10000px}.skip-link:focus{left:12px}.compare-grid .answer-content{max-height:none;overflow:visible}
@media(min-width:1500px){main{padding-top:48px}.home-hero{min-height:365px}.hero-copy{padding:39px 44px}.hero-copy h2{font-size:36px}.hero-art .report-illustration{width:270px}.answer-float{right:40px;bottom:50px}.float-tag{left:25px;top:60px}}
@media(max-width:1150px){.sidebar{width:196px;padding:28px 13px 18px}.workspace{margin-left:196px}.brand-name{font-size:21px}.brand img{width:145px}.topbar{padding:0 27px}main{padding:30px 27px}.hero-copy{padding:29px}.hero-copy h2{font-size:29px}.hero-art{transform:scale(.91);transform-origin:center}.hero-actions{gap:11px}.hero-actions .btn{padding:12px 15px}.home-hero{grid-template-columns:1.15fr 1fr}.panel{padding:23px}.step{padding:14px 8px;font-size:9px}.lesson-layout{grid-template-columns:1.1fr 1fr}.benefit{padding:20px}.edition{display:none}.answer-content{padding:19px}.lab-grid{grid-template-columns:1fr 1fr}#toast{left:calc(50% + 95px)}}
@media(max-width:900px){.sidebar{width:174px;padding:25px 9px 15px}.workspace{margin-left:174px}.brand{gap:7px;padding:0 10px}.brand-name{font-size:18px}.brand img{width:135px}.brand-mark{width:25px}.nav-link{font-size:12px;padding:11px}.academy-label{margin:22px 12px}.profile{padding:8px}.profile strong{font-size:10px}.profile small{font-size:9px}.avatar{width:30px;height:30px}.topbar{height:68px;padding:0 22px}main{padding:27px 22px}.status-pill{font-size:10px}.home-hero{grid-template-columns:1fr;min-height:0}.hero-copy{max-width:68%;padding:28px}.hero-copy h2{font-size:28px}.hero-art{position:absolute;width:40%;right:-12px;top:45px;transform:scale(.65);transform-origin:center right;height:300px}.hero-copy p{max-width:310px}.hero-actions small{display:none}.answer-float{right:-8px}.float-tag{display:none}.home-progress{padding:18px;gap:14px}.mini-steps{margin:0}.benefits{gap:10px}.benefit{padding:18px}.benefit p{font-size:11px}.lesson-layout,.lab-grid,.verify-layout,.result-layout{grid-template-columns:1fr}.lesson-source{order:-1}.lesson-source .source-note{font-size:10px}.lesson-source .source-table td{padding:8px}.lesson-source .task-box{display:none}.step{flex-direction:column;gap:6px;padding:11px 4px;font-size:9px}.compare-grid{gap:12px}.compare-grid .answer-header{padding:16px}.compare-grid .answer-content{padding:16px;font-size:12px}.empty-answer{min-height:220px}.empty-orb{width:50px;height:50px;margin-bottom:20px}.result-hero{padding:25px}.result-hero h1{font-size:26px}#toast{left:calc(50% + 85px)}}
@media(max-width:650px){body{font-size:14px}.sidebar{position:fixed;inset:auto 0 0;width:auto;height:65px;padding:0 9px;display:block;border-right:0;border-top:1px solid var(--line);box-shadow:0 -3px 15px #30255f05}.sidebar .brand,.academy-label,.nav-label,.sidebar-bottom{display:none}.nav{height:100%;flex-direction:row;gap:0;justify-content:space-around}.nav-link{flex:1;flex-direction:column;gap:4px;padding:9px 3px 7px;font-size:9px;border-radius:0;justify-content:center}.nav-link.active{background:transparent;color:var(--purple)}.nav-link .nav-dot{display:none}.nav-link svg{width:20px;height:20px}.workspace{margin-left:0;padding-bottom:65px}.topbar{height:63px;padding:0 20px;background:white}.breadcrumbs{display:none}.mobile-brand{display:flex;align-items:center;gap:8px;color:var(--navy);font-size:16px;font-weight:700;letter-spacing:1px}.mobile-brand img{width:123px;height:30px}.mobile-brand small{font-size:9px;letter-spacing:0;font-weight:500;border-left:1px solid var(--line);padding-left:10px}.status-pill{font-size:9px}.status-pill .provider-name{display:none}main{padding:26px 18px}.page-heading{margin-bottom:22px}.page-heading h1{font-size:31px;letter-spacing:-1px}.page-heading p{font-size:12px;margin-top:12px}.page-heading .eyebrow{font-size:10px;margin-bottom:9px}.home-hero{border-radius:19px}.hero-copy{max-width:100%;padding:25px 23px 28px}.hero-copy h2{font-size:28px;max-width:280px}.hero-copy p{font-size:12px;max-width:280px}.hero-art{display:none}.hero-actions{margin-top:20px}.hero-actions small{display:block;font-size:10px}.home-progress{margin:15px 0 27px;padding:16px;gap:13px}.home-progress .mini-steps{display:none}.home-progress .btn{margin-left:auto}.home-progress .progress-copy{min-width:0}.home-progress .progress-copy strong{font-size:12px}.home-progress .progress-copy small{font-size:10px}.progress-ring{width:37px;height:37px;font-size:10px}.benefits{grid-template-columns:1fr}.benefit{display:grid;grid-template-columns:38px 1fr;gap:4px 15px;padding:20px}.benefit-icon{grid-row:1/3;margin:0}.benefit h3{font-size:13px;margin:0}.benefit p{font-size:12px}.section-heading h2{font-size:18px}.section-heading span{font-size:10px}.page-footer{font-size:9px;flex-direction:column;gap:3px;margin-top:26px}.panel{padding:22px 20px;border-radius:15px}.lesson-layout{gap:15px}.lesson-source{order:0}.lesson-intro h2{font-size:22px}.lesson-intro p{font-size:13px}.principle{gap:12px}.check-label{font-size:11px}.steps{margin-bottom:20px;border-radius:10px}.step{font-size:8px;padding:11px 3px;gap:6px;white-space:normal;text-align:center}.step .step-num{width:20px;height:20px;font-size:9px}.lab-topline{align-items:center;gap:10px}.tab{padding:8px 11px;font-size:11px}.editor-panel h2{font-size:20px}.editor-toolbar{margin-top:22px}.prompt-area{min-height:200px}.compare-grid{grid-template-columns:1fr}.compare-intro{flex-direction:column;gap:13px}.comparison-note{font-size:11px}.answer-header{padding:17px 19px}.answer-panel{padding:0}.answer-content{font-size:12px;padding:19px}.below-actions{align-items:stretch}.below-actions .btn{font-size:12px}.source-meta{font-size:9px}.source-table{font-size:11px}.source-table td{padding:11px 5px}.quiz-field{font-size:11px}.result-hero{display:block;padding:26px 22px}.result-icon{width:52px;height:52px;margin-bottom:18px}.result-hero h1{font-size:28px}.result-hero p{font-size:12px}.result-layout{gap:17px}.final-area{min-height:320px}#toast{left:50%;bottom:80px;max-width:90vw;width:max-content}.fatal{margin:8vh 20px;padding:20px}}
@media(max-width:900px){.lab-grid,.verify-layout,.result-layout{grid-template-columns:minmax(0,1fr)}}
@media(max-width:420px){.lab-topline{flex-wrap:wrap;gap:12px}.editor-meta{gap:8px}.editor-meta span:last-child{flex-shrink:0}.home-progress{gap:9px}.profile strong{white-space:nowrap}}
/* The source stays open throughout the case, beside the work on wide screens. */
.case-layout{display:grid;grid-template-columns:minmax(0,1fr) 310px;gap:22px;align-items:start}
.case-work{grid-column:1;grid-row:1;min-width:0}
.case-source{grid-column:2;grid-row:1;min-width:0;padding:22px;position:sticky;top:20px;max-height:calc(100dvh - 40px);overflow-y:auto}
.case-source .source-heading{margin-bottom:16px}
.case-source .source-table td{padding:10px 5px}
.case-source .source-note{line-height:1.6}
.case-work .result-layout{grid-template-columns:minmax(0,1fr)}
.lesson-source{position:sticky;top:20px;max-height:calc(100dvh - 40px);overflow-y:auto}
@media(max-width:1300px){.case-work .lab-grid,.case-work .verify-layout{grid-template-columns:minmax(0,1fr)}}
@media(max-width:1100px){
  .case-layout{display:flex;flex-direction:column;gap:20px}
  .case-layout>*{width:100%}
  .case-source{position:static;max-height:none;overflow:visible;display:grid;grid-template-columns:minmax(0,1.2fr) minmax(0,1fr);gap:24px}
  .case-source .source-note{align-self:center;margin-top:0}
  .lesson-source{position:static;max-height:none;overflow:visible}
}
@media(max-width:900px){.lesson-source{order:-1}}
@media(max-width:650px){
  .case-source{grid-template-columns:minmax(0,1fr);gap:14px;padding:20px}
  .case-source .source-heading{margin-bottom:12px}
  .case-source .source-note{font-size:11px}
  .case-source .source-note p{margin-top:8px}
}
@media(prefers-reduced-motion:reduce){*{animation-duration:.01ms!important;transition:none!important;scroll-behavior:auto!important}}

.copy-buffer{position:fixed;top:0;left:0;width:1px;height:1px;padding:0;border:0;opacity:0;pointer-events:none;font-size:16px;overflow:hidden}