:root{--ink:#282534;--muted:#8b8797;--soft:#f8f7fb;--line:#eeecf2;--purple:#7458da;--purple-dark:#6045c2;--pale:#f0edfa;--green:#4b9472;--red:#bb725f;--gold:#a97840;--shadow:0 8px 30px rgba(43,34,69,.055);font-family:Inter,-apple-system,BlinkMacSystemFont,"Segoe UI","Noto Sans KR",sans-serif;color:var(--ink);background:var(--soft);font-synthesis:none}*{box-sizing:border-box}body{margin:0;font-size:14px;line-height:1.55}button,input,textarea,select{font:inherit}button{cursor:pointer}button:disabled{cursor:wait;opacity:.65}a{color:inherit;text-decoration:none}.hidden{display:none!important}.login-screen{display:grid;grid-template-columns:1.08fr .92fr;min-height:100vh;background:#fff}.login-story{position:relative;padding:44px 7vw 36px;background:#272237;color:white;display:flex;flex-direction:column;overflow:hidden}.login-story:before,.login-story:after{content:"";position:absolute;border-radius:50%;border:1px solid #ffffff14;pointer-events:none}.login-story:before{width:550px;height:550px;right:-215px;top:14%}.login-story:after{width:390px;height:390px;right:-135px;top:24%}.brand{display:flex;align-items:center;gap:10px;font-size:19px;font-weight:750;letter-spacing:-.6px}.brand-mark{width:37px;height:37px;border-radius:12px;background:var(--purple);display:grid;place-items:center;color:#fff;font-size:24px;box-shadow:0 5px 15px #7458da45}.brand-light{position:relative;z-index:1}.story-copy{position:relative;z-index:1;margin:auto 0}.overline{display:block;font-size:10px;font-weight:750;letter-spacing:1.6px;color:#9d8bdc}.story-copy h1{font-size:clamp(37px,4.6vw,61px);line-height:1.25;letter-spacing:-2.6px;margin:22px 0}.story-copy h1 em{font-style:normal;color:#b6a4ff}.story-copy p{max-width:435px;color:#c3bfcb;line-height:1.9;font-size:14px}.story-flow{position:relative;z-index:1;display:flex;align-items:center;gap:clamp(8px,1.7vw,24px);font-size:11px;color:#ddd8ec;white-space:nowrap}.story-flow i{font-style:normal;color:#8c7acf}.story-foot{font-size:9px;letter-spacing:1.8px;color:#888398;margin-top:43px}.login-panel{display:grid;place-items:center;padding:35px}.login-box{width:min(100%,410px)}.login-box h2{font-size:28px;letter-spacing:-1.4px;margin:14px 0 4px}.login-box>p{font-size:12px;color:var(--muted);margin-bottom:27px}.role-pick{display:grid;grid-template-columns:1fr 1fr;gap:11px;margin-bottom:22px}.role-choice{border:1px solid var(--line);border-radius:12px;background:white;padding:15px;text-align:left;position:relative}.role-choice.selected{border-color:#a793ee;box-shadow:0 0 0 3px #eeeafd}.role-choice b,.role-choice small{display:block}.role-choice b{font-size:12px;margin:7px 0 2px}.role-choice small{font-size:10px;color:var(--muted)}.role-symbol{display:grid;place-items:center;width:30px;height:30px;border-radius:9px;background:var(--pale);color:var(--purple);font-size:17px}.role-choice.selected:after{content:"✓";position:absolute;right:12px;top:12px;color:var(--purple);font-size:12px}.login-box label,.label{display:block;font-size:11px;font-weight:650;color:#625d6b;margin-bottom:7px}.login-box input,.input,.select,.textarea{width:100%;border:1px solid #e4e1ea;border-radius:9px;padding:12px 13px;background:#fff;outline:none;color:var(--ink)}.login-box input:focus,.input:focus,.select:focus,.textarea:focus{border-color:#a58fe9;box-shadow:0 0 0 3px #f1eefd}.login-box input{margin-bottom:12px}.btn{border:0;border-radius:9px;padding:11px 15px;font-size:12px;font-weight:680;transition:.16s ease}.btn-primary{background:var(--purple);color:white;box-shadow:0 5px 12px #7458da24}.btn-primary:hover{background:var(--purple-dark);transform:translateY(-1px)}.btn-secondary{background:#f2effb;color:#6f53cf}.btn-plain{border:1px solid var(--line);color:#625d6b;background:#fff}.btn-danger{background:#fff2ef;color:#ab6254}.full{width:100%;display:flex;align-items:center;justify-content:center;gap:10px}.login-help{min-height:18px;color:#ac5f51!important;font-size:11px!important;margin:9px 0!important}.login-privacy{display:flex;gap:9px;margin-top:26px;padding-top:17px;border-top:1px solid var(--line);font-size:10px;line-height:1.65;color:#a19ca9}.login-privacy span{color:#856ad9;font-size:15px}.demo-credentials{margin-top:10px;border-radius:8px;background:#f6f4fb;padding:10px;font-size:10px;color:#817b8b}.demo-credentials code{font-size:10px;color:#654bc1}.app{min-height:100vh}.sidebar{position:fixed;inset:0 auto 0 0;width:246px;padding:25px 16px 14px;background:#fff;border-right:1px solid var(--line);display:flex;flex-direction:column;z-index:5}.sidebar>.brand{padding:0 8px}.side-course{display:flex;align-items:center;gap:10px;padding:12px 9px;margin-top:34px;background:#f8f7fb;border:1px solid #f1eff5;border-radius:10px}.course-glyph{display:grid;place-items:center;width:34px;height:34px;background:#eeeafa;color:#765bd5;border-radius:9px;font-size:19px}.side-course b,.side-course small{display:block}.side-course b{font-size:11px}.side-course small{font-size:9px;color:#a09aa9;margin-top:2px}.chevron{margin-left:auto;color:#a59fad}.side-caption{margin:29px 11px 10px;font-size:9px;letter-spacing:1.3px;color:#aaa5b1;font-weight:750}#navigation{display:grid;gap:4px}.nav-button{display:flex;gap:11px;align-items:center;padding:10px 12px;background:transparent;border:0;border-radius:8px;text-align:left;color:#777280;font-size:11px;font-weight:600}.nav-button:hover{background:#faf9fc}.nav-button.active{background:#f0edfa;color:#6e53cd}.nav-icon{width:19px;text-align:center;font-size:15px}.nav-label{flex:1}.nav-button .nav-badge{font-size:9px;color:#a8a1b1}.side-bottom{display:flex;align-items:center;gap:9px;margin-top:auto;padding:14px 5px 12px;border-top:1px solid var(--line)}.active-role-icon{width:31px;height:31px;display:grid;place-items:center;border-radius:50%;background:#eeeafb;color:#755ad4;font-size:12px}.identity{flex:1}.identity b,.identity small{display:block}.identity b{font-size:10px}.identity small{font-size:9px;color:#aaa5b1;margin-top:1px}.icon-button{width:27px;height:27px;border:0;background:transparent;border-radius:7px;color:#9d97a5}.icon-button:hover{background:#f5f3f8}.side-version{padding:4px 8px;color:#b8b2bf;font-size:8px;letter-spacing:1px}.main{margin-left:246px;min-height:100vh}.topbar{position:sticky;top:0;z-index:4;height:62px;border-bottom:1px solid var(--line);background:#ffffffed;backdrop-filter:blur(10px);display:flex;align-items:center;justify-content:space-between;padding:0 clamp(20px,4vw,54px)}.breadcrumbs{font-size:11px;color:#a19ba9}.breadcrumbs i{font-style:normal;padding:0 11px;color:#d0ccd5}.breadcrumbs b{font-weight:600;color:#5b5664}.top-actions{display:flex;align-items:center;gap:13px}.online{display:flex;align-items:center;gap:7px;font-size:9px;color:#9792a0}.online i{width:6px;height:6px;border-radius:50%;background:#7bb490}.top-avatar{border:0;background:#ece8fa;color:#7056cb;font-size:9px;font-weight:700;border-radius:50%;width:31px;height:31px}.mobile-brand,.mobile-nav{display:none}.page-wrap{max-width:1390px;padding:35px clamp(20px,4vw,54px) 26px;margin:0 auto}.page-title-row{display:flex;justify-content:space-between;align-items:flex-start;gap:15px;margin-bottom:23px}.eyebrow{font-size:9px;text-transform:uppercase;letter-spacing:1.4px;color:#a398be;font-weight:750}.page-title{font-size:26px;line-height:1.25;letter-spacing:-1.2px;margin:7px 0 6px}.page-subtitle{font-size:11px;color:#938e9c;line-height:1.7;max-width:650px}.tag{display:inline-flex;align-items:center;gap:5px;border-radius:30px;padding:6px 9px;font-size:9px;color:#8e8797;background:#f5f3f8;white-space:nowrap}.tag-purple{color:#7155ce;background:#f0edfb}.tag-green{color:#4f9472;background:#edf7f0}.tag-gold{color:#a57a49;background:#fbf4e9}.tag-red{color:#ad695b;background:#fcf0ed}.notice{display:flex;align-items:flex-start;gap:10px;border:1px solid #ece8f7;background:#f5f3fb;color:#7b7390;padding:11px 14px;border-radius:9px;font-size:10px;line-height:1.65;margin-bottom:19px}.notice-icon{font-size:14px;color:#866dde}.notice strong{color:#64578e}.notice.warning{border-color:#f1e7d5;background:#fbf7ef;color:#8d7b5f}.notice.warning .notice-icon{color:#c38e4b}.grid{display:grid;gap:15px}.grid-3{grid-template-columns:repeat(3,minmax(0,1fr))}.grid-2{grid-template-columns:repeat(2,minmax(0,1fr))}.grid-main{grid-template-columns:minmax(0,1.55fr) minmax(260px,.85fr)}.card{background:#fff;border:1px solid var(--line);border-radius:12px;padding:19px;box-shadow:var(--shadow);min-width:0}.card-header{display:flex;justify-content:space-between;align-items:flex-start;gap:12px;margin-bottom:16px}.card-title{font-size:14px;letter-spacing:-.35px;margin:0}.card-subtitle{font-size:10px;line-height:1.6;color:#a19ba9;margin-top:4px}.metric-card{padding:17px 18px}.metric-label{font-size:10px;color:#8b8593}.metric-value{font-size:26px;font-weight:720;letter-spacing:-1.2px;margin-top:12px}.metric-help{font-size:9px;color:#aba5b0;margin-top:4px}.metric-symbol{float:right;color:#9e8adc;font-size:18px}.section-space{margin-top:17px}.section-heading{display:flex;justify-content:space-between;align-items:center;margin:26px 0 12px}.section-heading h2{font-size:15px;letter-spacing:-.4px;margin:0}.section-heading p{font-size:10px;color:#9c96a3;margin-top:4px}.material-list{display:grid;gap:9px}.material-row{display:flex;align-items:center;gap:11px;padding:11px;border:1px solid #f0eef3;border-radius:9px}.material-icon{display:grid;place-items:center;width:35px;height:38px;border-radius:8px;background:#f2effb;color:#795ed6;font-size:14px;flex:none}.material-meta{flex:1;min-width:0}.material-meta b{display:block;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;font-size:10px}.material-meta small{display:block;font-size:9px;color:#aaa4b0;margin-top:3px}.empty-state{padding:26px;text-align:center;border:1px dashed #e7e3ed;border-radius:9px;color:#aaa4b0;font-size:10px;line-height:1.7}.empty-state .empty-icon{display:block;font-size:22px;color:#b3a3e7;margin-bottom:8px}.step-list{display:grid}.step-row{display:flex;align-items:center;gap:12px;padding:12px 0;border-top:1px solid #f2f0f4}.step-num{font-size:9px;color:#aaa2b6;font-weight:750}.step-mark{width:31px;height:31px;display:grid;place-items:center;border-radius:9px;background:#f1edfb;color:#765bd3;font-size:14px}.step-copy{flex:1}.step-copy b,.step-copy small{display:block}.step-copy b{font-size:10px}.step-copy small{font-size:9px;color:#aaa4b0;margin-top:3px}.arrow{color:#bbb4c2}.upload-zone{display:grid;place-items:center;min-height:130px;padding:18px;border:1px dashed #cabfe9;border-radius:10px;background:#fbfaff;text-align:center;cursor:pointer;transition:.15s}.upload-zone:hover,.upload-zone.dragging{background:#f3effe;border-color:#a48ce8}.upload-zone input{display:none}.upload-symbol{display:grid;place-items:center;width:34px;height:34px;border-radius:10px;background:#eee9fb;color:#795ed5;font-size:17px;margin-bottom:8px}.upload-zone b{font-size:10px}.upload-zone small{font-size:9px;color:#a39daa;margin-top:4px}.field{margin-bottom:13px}.field:last-child{margin-bottom:0}.field .label{margin-bottom:6px}.input,.select,.textarea{font-size:11px;padding:10px 11px}.textarea{resize:vertical;min-height:75px;line-height:1.65}.field-grid{display:grid;grid-template-columns:1fr 1fr;gap:10px}.form-actions{display:flex;justify-content:flex-end;gap:8px;margin-top:14px}.concept-list{display:grid;gap:8px}.concept-row{display:grid;grid-template-columns:46px 1fr;gap:10px;padding:10px 0;border-top:1px solid #f2eff4}.concept-page{font-size:9px;color:#836bd1;font-weight:700}.concept-row b{font-size:10px}.concept-row small{display:block;font-size:9px;color:#a39daa;margin-top:3px}.draft-output{white-space:pre-wrap;font-size:11px;line-height:1.85;color:#544e5e;background:#faf9fc;border:1px solid #f0eef3;border-radius:9px;padding:16px;margin-top:16px;max-height:650px;overflow:auto}.lesson-layout{display:grid;grid-template-columns:minmax(0,1.15fr) minmax(330px,.85fr);gap:15px;align-items:start}.slide-card{padding:0;overflow:hidden}.slide-toolbar{display:flex;align-items:center;justify-content:space-between;border-bottom:1px solid var(--line);padding:11px 15px}.slide-toolbar b{font-size:10px}.slide-toolbar select{max-width:200px}.slide-body{min-height:330px;padding:clamp(21px,3vw,38px);display:flex;flex-direction:column;justify-content:center;background:linear-gradient(145deg,#fff,#fcfbff)}.slide-kicker{font-size:9px;letter-spacing:1px;color:#9e91c4;font-weight:700}.slide-body h2{font-size:23px;letter-spacing:-1px;margin:11px 0}.slide-text{font-size:12px;line-height:1.9;color:#676170;white-space:pre-wrap}.slide-concepts{display:flex;flex-wrap:wrap;gap:7px;margin-top:18px}.slide-concepts span{font-size:9px;color:#765ed0;background:#f0edfa;border-radius:20px;padding:5px 8px}.slide-nav{display:flex;justify-content:space-between;align-items:center;border-top:1px solid var(--line);padding:10px 14px}.slide-nav small{font-size:9px;color:#a39daa}.note-card .textarea{min-height:210px}.note-save-line{display:flex;align-items:center;justify-content:space-between;margin-top:9px}.note-save-line small{font-size:9px;color:#aaa4b0}.review-box{margin-top:14px;border:1px solid #eeeaf5;border-radius:10px;overflow:hidden}.review-head{display:flex;align-items:center;gap:9px;padding:12px;background:#faf9fc}.review-status{width:27px;height:27px;display:grid;place-items:center;border-radius:8px;background:#f1edfc;color:#7d63d5}.review-head b{font-size:10px}.review-head small{display:block;font-size:9px;color:#a39da9;margin-top:2px}.review-body{padding:12px}.review-body p{font-size:10px;line-height:1.7;color:#696373;margin:0 0 9px}.review-evidence{padding:9px 10px;border-left:2px solid #a38de6;background:#faf9fd;font-size:9px;color:#777080;line-height:1.65}.review-evidence b{display:block;color:#7157c8;margin-bottom:3px}.review-actions{display:flex;flex-wrap:wrap;gap:7px;margin-top:10px}.ladder-step{border-top:1px solid #f1eff4;padding:11px 12px}.ladder-step small{display:block;font-size:8px;letter-spacing:.7px;color:#a49bac;font-weight:700}.ladder-step p{font-size:10px;color:#5f5968;line-height:1.7;margin:5px 0 0}.rating-line{display:flex;align-items:center;gap:7px;padding:9px 12px;background:#fbfafc;border-top:1px solid #f1eff4}.rating-line span{font-size:9px;color:#aaa4b0;margin-right:auto}.rating-line button{background:white;border:1px solid var(--line);border-radius:7px;padding:5px 8px;font-size:10px}.question-panel{margin-top:15px}.question-response{padding:12px;background:#f8f6fc;border-radius:9px;margin-top:10px}.question-response p{font-size:10px;line-height:1.75}.question-source{font-size:9px;color:#8066ce;margin-top:7px}.answer-hint{border-top:1px solid #e9e4f3;margin-top:9px;padding-top:9px;color:#6d6479}.issue-list{display:grid}.issue-row{display:grid;grid-template-columns:30px 1fr auto;gap:10px;align-items:center;border-top:1px solid #f1eff4;padding:14px 0}.issue-rank{display:grid;place-items:center;width:26px;height:26px;border-radius:8px;background:#f2effb;color:#826ad0;font-size:9px;font-weight:700}.issue-row b{font-size:10px}.issue-row small{display:block;color:#aaa4b0;font-size:9px;margin-top:4px}.issue-count{font-size:12px;color:#765bd5;font-weight:700}.heat-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(100px,1fr));gap:8px}.heat-cell{padding:10px;border:1px solid #f0edf4;border-radius:8px}.heat-cell span,.heat-cell b,.heat-cell small{display:block}.heat-cell span{font-size:8px;color:#a29ba8}.heat-cell b{font-size:10px;margin-top:5px}.heat-cell small{font-size:8px;color:#aaa4b0;margin-top:3px}.heat-intensity{height:4px;border-radius:3px;background:#eeeaf7;margin-top:8px}.heat-intensity i{display:block;height:100%;border-radius:3px;background:#967ee0}.recommendation{border:1px solid #eee9f7;background:#faf9fd;padding:12px;border-radius:9px;margin-top:10px}.recommendation p{font-size:10px;line-height:1.8;color:#716a7d;white-space:pre-wrap;margin-top:8px}.impact-compare{display:grid;grid-template-columns:1fr auto 1fr;align-items:center;gap:10px;text-align:center;padding:20px 5px}.impact-num{font-size:30px;font-weight:750;letter-spacing:-1px}.impact-num small{font-size:10px;font-weight:500;color:#99929f;margin-left:3px}.impact-label{font-size:9px;color:#a19ba9}.impact-arrow{color:#9a88da;font-size:17px}.progress{height:7px;background:#f0eef4;border-radius:4px;overflow:hidden;margin-top:9px}.progress i{display:block;height:100%;border-radius:4px;background:#a18ae3}.quiz-question{padding:13px 0;border-top:1px solid #f0eef3}.quiz-question>p{font-size:11px;font-weight:650;margin:0 0 9px}.choice{display:flex;gap:8px;align-items:flex-start;padding:7px 8px;margin:4px 0;border:1px solid #efedf2;border-radius:7px;font-size:10px;cursor:pointer}.choice input{margin:2px 0 0;accent-color:var(--purple)}.score-panel{text-align:center;padding:15px;background:#f7f5fc;border-radius:9px;margin-top:12px}.score-panel b{font-size:25px;color:#7257d1}.score-panel p{font-size:9px;color:#99929f}.growth-chart{display:flex;align-items:end;gap:10px;height:140px;padding:15px 10px;border-bottom:1px solid var(--line)}.growth-bar{flex:1;display:flex;flex-direction:column;align-items:center;justify-content:end;height:100%;gap:6px}.growth-bar i{width:min(44px,65%);min-height:3px;background:#a58fe7;border-radius:5px 5px 0 0}.growth-bar.post i{background:#7fbd98}.growth-bar span{font-size:9px;color:#8d8795}.growth-bar small{font-size:8px;color:#aaa4b0}.timeline{display:grid;gap:10px}.timeline-row{display:flex;gap:10px;align-items:flex-start}.timeline-dot{width:8px;height:8px;margin:5px 2px;border-radius:50%;background:#a28be2;box-shadow:0 0 0 4px #f0ecfb}.timeline-row b{font-size:10px}.timeline-row small{display:block;font-size:9px;color:#aaa4b0;margin-top:3px}.announce{padding:11px 0;border-top:1px solid #f1eff4}.announce b{font-size:10px}.announce p{font-size:10px;color:#716b7a;line-height:1.7;margin:5px 0}.announce small{font-size:8px;color:#aca6b2}.pill-row{display:flex;gap:7px;flex-wrap:wrap}.privacy-copy{font-size:9px;line-height:1.75;color:#a39daa}.toast{position:fixed;z-index:10;bottom:22px;left:50%;transform:translate(-50%,20px);opacity:0;transition:.2s;pointer-events:none;background:#272237;color:#fff;padding:10px 15px;border-radius:8px;font-size:10px;box-shadow:var(--shadow);max-width:min(90vw,500px)}.toast.show{opacity:1;transform:translate(-50%,0)}footer{display:flex;justify-content:space-between;gap:12px;border-top:1px solid var(--line);padding:15px 2px 0;margin-top:29px;color:#b4aeba;font-size:8px}.modal-backdrop{position:fixed;inset:0;z-index:8;background:#201c2c66;display:grid;place-items:center;padding:18px}.modal{background:white;border-radius:13px;width:min(100%,550px);padding:22px;box-shadow:0 18px 70px #1c16344c}.modal h2{font-size:17px;margin:6px 0 15px}.modal-actions{display:flex;justify-content:flex-end;gap:8px;margin-top:15px}.loading{display:inline-flex;align-items:center;gap:8px;color:#918a9b;font-size:10px}.spinner{width:13px;height:13px;border:2px solid #e8e3f2;border-top-color:#8065d3;border-radius:50%;animation:spin .7s linear infinite}@keyframes spin{to{transform:rotate(360deg)}}
@media(max-width:1080px){.sidebar{width:218px}.main{margin-left:218px}.lesson-layout{grid-template-columns:1fr 1fr}.grid-main{grid-template-columns:1fr}.story-flow{gap:8px;font-size:9px}}@media(max-width:760px){.login-screen{grid-template-columns:1fr}.login-story{display:none}.login-panel{min-height:100vh;padding:25px}.sidebar{display:none}.main{margin:0}.topbar{height:56px;padding:0 17px}.mobile-brand{display:flex;align-items:center;gap:7px;font-size:13px;font-weight:700}.mobile-brand .brand-mark{width:27px;height:27px;border-radius:8px;font-size:18px}.breadcrumbs{display:none}.online{font-size:0}.online i{width:7px;height:7px}.page-wrap{padding:24px 16px}.mobile-nav{display:flex;position:sticky;top:56px;z-index:3;overflow:auto;gap:5px;padding:8px 13px;background:#fff;border-bottom:1px solid var(--line)}.mobile-nav .nav-button{white-space:nowrap;padding:7px 9px;font-size:9px}.mobile-nav .nav-icon{font-size:12px;width:auto}.page-title{font-size:23px}.grid-3{grid-template-columns:1fr 1fr}.grid-2,.grid-main,.lesson-layout{grid-template-columns:1fr}.grid-3 .metric-card:last-child{grid-column:span 2}.page-title-row{align-items:flex-start}.page-title-row>.btn{font-size:10px;padding:9px}.impact-compare{gap:5px}.impact-num{font-size:24px}.card{padding:15px}.slide-card{padding:0}.slide-body{min-height:270px}footer span:nth-child(2){display:none}.field-grid{grid-template-columns:1fr 1fr}}@media(max-width:390px){.grid-3{grid-template-columns:1fr}.grid-3 .metric-card:last-child{grid-column:auto}.role-choice{padding:11px}.page-title-row{flex-direction:column}}
@media print{body{background:#fff}.sidebar,.topbar,.mobile-nav,footer,.toast,.btn,button{display:none!important}.main{margin:0!important}.page-wrap{max-width:none;padding:0!important}.card,.metric-card{box-shadow:none;break-inside:avoid;border-color:#ddd}.notice{print-color-adjust:exact;-webkit-print-color-adjust:exact}.page-title-row{margin-top:0}.issue-row,.timeline-row{break-inside:avoid}}



/* role-specific login story */
.story-copy-stage{position:relative;z-index:1;display:grid;margin:auto 0}
.story-copy-stage .story-copy{grid-area:1/1;margin:0;opacity:0;visibility:hidden;transition:opacity 520ms cubic-bezier(.4,0,.2,1),transform 620ms cubic-bezier(.4,0,.2,1),visibility 0s linear 620ms}
.story-copy-stage .story-copy[data-role-story="student"]{transform:translateX(-52px)}
.story-copy-stage .story-copy[data-role-story="teacher"]{transform:translateX(52px)}
.story-copy-stage .story-copy.is-active{opacity:1;visibility:visible;transform:translateX(0);transition-delay:0s}
.story-copy-stage .story-copy p{margin-bottom:0}
.story-flow-stage{display:grid;align-items:center}
.story-flow-stage .story-flow{grid-area:1/1;opacity:0;visibility:hidden;transition:opacity 420ms ease,transform 520ms cubic-bezier(.4,0,.2,1),visibility 0s linear 520ms}
.story-flow-stage .story-flow[data-role-flow="student"]{transform:translateX(-34px)}
.story-flow-stage .story-flow[data-role-flow="teacher"]{transform:translateX(34px)}
.story-flow-stage .story-flow.is-active{opacity:1;visibility:visible;transform:translateX(0);transition-delay:0s}
.role-choice{transition:border-color 180ms ease,box-shadow 180ms ease,transform 180ms ease}
.role-choice:hover{transform:translateX(2px)}
@media(prefers-reduced-motion:reduce){.story-copy-stage .story-copy,.story-flow-stage .story-flow,.role-choice{transition:none!important}.role-choice:hover{transform:none}}

/* Refined workspace controls and optional settings */
.optional-card details > summary{display:flex;align-items:center;justify-content:space-between;gap:16px;cursor:pointer;list-style:none;border-radius:10px;padding:4px}
.optional-card details > summary::-webkit-details-marker{display:none}
.optional-card details > summary::after{content:"+";display:grid;place-items:center;flex:none;width:32px;height:32px;border-radius:10px;background:#f1eefb;color:#6045c2;font-size:21px}
.optional-card details[open] > summary::after{content:"−"}
.optional-card summary strong,.optional-card summary small{display:block}
.optional-card summary strong{font-size:15px;letter-spacing:-.3px}
.optional-card summary small{margin-top:4px;color:#716c7c;font-size:12px;line-height:1.5}
.optional-card details[open] > summary{margin-bottom:20px;padding-bottom:16px;border-bottom:1px solid var(--line)}
.optional-card .field{margin-bottom:16px}
.visually-hidden{position:absolute!important;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}
button:focus-visible,a:focus-visible,input:focus-visible,textarea:focus-visible,select:focus-visible,summary:focus-visible{outline:3px solid #7051d5;outline-offset:3px}
.input,.select,.textarea{font-size:14px;line-height:1.5}
.label{font-size:12px}
.btn{min-height:40px}
.upload-zone{transition:border-color .2s ease,background-color .2s ease}
.upload-zone:hover,.upload-zone:focus-within{border-color:#7458da;background:#f8f6ff}
@media(max-width:760px){.optional-card summary small{font-size:12px}.btn{min-height:44px}.input,.select,.textarea{font-size:16px}}
@media(prefers-reduced-motion:reduce){.upload-zone{transition:none}}

.teacher-welcome{display:flex;align-items:center;justify-content:space-between;gap:24px;padding:clamp(24px,3vw,38px);border:1px solid #e9e4f8;border-radius:20px;background:linear-gradient(125deg,#f7f5ff,#fff);box-shadow:var(--shadow)}
.teacher-welcome h2{margin:10px 0 8px;font-size:clamp(21px,2.3vw,29px);line-height:1.3;letter-spacing:-.8px}
.teacher-welcome p{max-width:600px;margin:0 0 20px;color:#625c70;font-size:14px;line-height:1.75}
.teacher-welcome-mark{display:grid;place-items:center;flex:none;width:80px;height:80px;border-radius:24px;background:#ece7fb;color:#7458da;font-size:38px}
@media(max-width:760px){.teacher-welcome{padding:22px}.teacher-welcome-mark{width:50px;height:50px;border-radius:16px;font-size:25px}.teacher-welcome p{font-size:13px}}

/* Readable workspace hierarchy */
.grid > .optional-card{align-self:start}
.page-wrap .privacy-copy,.page-wrap .metric-help,.page-wrap .card p{font-size:13px;line-height:1.65;color:#615d6d}
.page-wrap .card h2,.page-wrap .section-heading h2{font-size:16px}
.nav-button{min-height:44px}
.nav-label{font-size:13px}
.page-wrap .label{font-size:13px;color:#464050}
.page-wrap .input,.page-wrap .select,.page-wrap .textarea{min-height:44px}
.page-wrap .textarea{min-height:100px}
.upload-zone b{font-size:14px}
.upload-zone small{font-size:12px;color:#625d70}
.side-course small,.identity small{font-size:11px}
@media(max-width:760px){.mobile-nav .nav-button{min-height:44px;font-size:12px}.page-wrap .input,.page-wrap .select,.page-wrap .textarea{font-size:16px}}

.mobile-role-brief{display:none}
@media(max-width:760px){
 .mobile-role-brief{display:grid;margin:-5px 0 20px;padding:13px 15px;border-radius:12px;background:#f5f2fc}
 .mobile-role-brief p{grid-area:1/1;margin:0;color:#514864;font-size:13px;line-height:1.6;opacity:0;visibility:hidden;transform:translateX(18px);transition:opacity 420ms ease,transform 520ms cubic-bezier(.4,0,.2,1),visibility 0s linear 520ms}
 .mobile-role-brief p[data-role-brief="student"]{transform:translateX(-18px)}
 .mobile-role-brief p.is-active{opacity:1;visibility:visible;transform:translateX(0);transition-delay:0s}
}
@media(prefers-reduced-motion:reduce){.mobile-role-brief p{transition:none}}

/* Legibility for instructional content */
.page-title{word-break:keep-all;overflow-wrap:break-word;text-wrap:balance}
.page-subtitle{font-size:13px;color:#625d6c}
.notice{font-size:12px;color:#514b60;line-height:1.65}
.notice.warning{color:#664c29}
.notice strong{color:#473b75}
.empty-state{font-size:12px;color:#6e6878}
.slide-text{font-size:14px;color:#4f4959;overflow-wrap:anywhere}
.tag,.slide-concepts span{font-size:11px}
@media(max-width:760px){.page-title{font-size:22px}.notice{font-size:12px}.slide-text{font-size:14px}}

.question-prompt{margin-bottom:12px;padding:12px 14px;border-radius:10px;background:#f5f2fc;color:#443b59}
.question-prompt span{font-size:11px;font-weight:700;color:#6650a7}
.question-prompt p{margin:4px 0 0;font-size:14px;line-height:1.6;overflow-wrap:anywhere}
.score-panel[role="status"]{margin-top:14px}

.quiz-entry{border-top:1px solid var(--line);padding:14px 0}
.quiz-entry summary{cursor:pointer;font-size:14px;font-weight:700;color:#443b59;line-height:1.5}
.quiz-entry[open] summary{margin-bottom:12px}