/* U01: a quiet coaching room opens into a full-screen, continuous living book. */
:root{--forest:#102f46;--paper-warm:#ffffff;--book-ink:#153447;--book-muted:#5c7180;--copper:#c55346;--book-line:#e3f4f1}
[hidden]{display:none!important}html{scroll-padding-top:95px}body{background:#f8fbfc;color:#153447}#learning{max-width:none;padding:0;margin:0;min-height:100vh;outline:none}.loading,.load-error{max-width:700px;margin:12vh auto;padding:24px}button,a,summary{-webkit-tap-highlight-color:transparent}button:focus-visible,a:focus-visible,summary:focus-visible,textarea:focus-visible{outline:3px solid #087f84;outline-offset:4px}button{transition:background .18s,border-color .18s,transform .18s}button:active{transform:translateY(1px)}
.coach-header{max-width:1180px;border:0;padding:22px 32px;gap:22px}.coach-header img{padding:0;background:none;width:96px}.coach-header span{font-size:11px;letter-spacing:1.3px;text-transform:uppercase}.coach-header .library-link{margin-left:auto;font-size:13px;text-decoration:none;color:#5c7180}.chat-shell{max-width:800px;margin:40px auto 0;padding:0 32px 48px}.coach-presence{display:flex;align-items:center;gap:13px}.avatar{display:block;object-fit:contain;border-radius:50%;background:#e3f4f1;width:48px;height:48px;flex-shrink:0}.coach-presence div{display:flex;flex-direction:column;line-height:1.6}.coach-presence strong{font-size:16px}.coach-presence span{font-size:12px;color:#5c7180}.presence-dot{width:7px;height:7px;background:#5c7180;border-radius:100%;margin-left:3px}.conversation-heading{margin:34px 0 24px}.conversation-heading h1{font:normal clamp(32px,4vw,47px)/1.12 Georgia,"Times New Roman",serif;letter-spacing:-1.2px;max-width:660px;margin:12px 0}.eyebrow{font-size:10px;letter-spacing:1.8px;color:#5c7180}.message{margin:20px 0 24px}.message-author{font-size:11px;font-weight:700;letter-spacing:.7px;color:#5c7180}.message p{font-size:17px;line-height:1.75;margin:6px 0;white-space:pre-wrap}.user-message{margin-left:52px;background:#f8fbfc;border-radius:18px 18px 3px 18px;padding:12px 20px}.user-message p{margin:4px 0}.next-explanation{font-size:13px;color:#5c7180;margin:12px 0 30px}.phase-actions{display:flex;flex-wrap:wrap;gap:10px;margin:26px 0}.phase-actions:empty{display:none}.primary{background:#087f84!important;border-color:#087f84!important;color:#fff!important;border-radius:9px;padding:13px 20px}.primary:hover{background:#066469!important}.composer{margin-top:38px;border-top:1px solid #e3f4f1;padding-top:23px}.composer>label{display:block;font-size:12px;color:#5c7180;margin-bottom:9px}.composer>div{display:flex;gap:12px;align-items:flex-end;padding:10px 12px 10px 17px;border:1px solid #d8e3e8;background:#fff;border-radius:15px}.composer textarea{min-height:42px;height:48px;max-height:160px;border:0;border-radius:0;padding:10px 0;resize:vertical;background:transparent;font-size:15px}.composer textarea:focus{outline:none}.composer>div:focus-within{outline:2px solid #91aeb9}.composer .send-button{width:36px;height:36px;flex-shrink:0;display:grid;place-items:center;padding:0;background:#087f84;color:#fff;border:0;border-radius:50%;font-size:21px;margin-bottom:4px}.composer>p{font-size:11px;line-height:1.6;color:#5c7180;margin:10px 4px}.chat-foot{display:flex;gap:20px;justify-content:space-between;align-items:flex-start;margin-top:16px}.time-control{display:flex;align-items:center;gap:14px;font-size:11px;color:#5c7180;white-space:nowrap}.text-button{background:transparent;border:0;font-size:11px;padding:7px 0;color:inherit}.prototype-info{font-size:11px;max-width:360px;text-align:right}.prototype-info summary{padding:6px 0;font-weight:400;color:#5c7180}.prototype-info p{text-align:left;line-height:1.7}.prototype-info a{font-size:11px}#activity{scroll-margin-top:24px}#activity>h2{font:normal 30px/1.2 Georgia,serif;margin:40px 0 22px}.note-label{display:block;font-size:15px;font-weight:600;margin:26px 0 10px}#activity textarea{background:#fff;min-height:120px;font-size:16px}#case-context{background:#f8fbfc;border-left:3px solid #91aeb9;padding:2px 22px;border-radius:0 10px 10px 0}.chat-shell .law-exercise{background:#fff;border-color:#e3f4f1;border-radius:14px;margin:24px 0}.chat-shell .law-exercise h3{font-size:19px}.rating{display:grid;border:0;padding:0;gap:10px;margin:24px 0}.rating legend{font-size:14px;margin-bottom:12px}.rating label{display:flex;align-items:center;gap:12px;background:white;border:1px solid #e3f4f1;border-radius:10px;padding:14px;cursor:pointer;font-size:15px}.rating label:has(:checked){background:#e3f4f1;border-color:#5c7180}.rating input{accent-color:#087f84}.round-summary{margin-top:30px}.round-summary h2{font:normal 34px Georgia}.round-summary>ul{list-style:none;padding:0}.round-summary li{border-bottom:1px solid #e3f4f1;padding:15px 0;display:flex;gap:22px;align-items:center}.round-summary li button{border:0;background:transparent;text-align:left;padding:0;font-weight:400;line-height:1.5;font-size:14px;flex:1}.round-summary li span{font-size:11px;min-width:95px;color:#5c7180}.saved-note{padding:20px 22px;background:#f8fbfc;border-radius:12px;margin:15px 0}.saved-note strong{font-size:12px}.saved-note p{font-size:15px;white-space:pre-wrap;margin:6px 0}
/* The book occupies the entire reading surface, with no chat mounted beside it. */
body[data-world=book]{background:#102f46;background-image:radial-gradient(ellipse at 15% 2%,#153447 0,transparent 52%),radial-gradient(ellipse at 90% 60%,#153447 0,transparent 50%);color:var(--book-ink)}.book-world{min-height:100vh;padding:96px 36px 124px}.book-toolbar{position:fixed;inset:0 0 auto;z-index:20;height:66px;display:flex;align-items:center;justify-content:space-between;gap:20px;padding:0 36px;background:#102f46f5;color:#e3f4f1;box-shadow:0 1px 0 #e3f4f121;backdrop-filter:blur(14px)}.book-toolbar button,.book-toolbar summary{color:inherit;font-size:12px;background:transparent;border:0;padding:10px 0}.book-toolbar button:hover{color:white;background:none}.book-toolbar-title{font-size:10px;letter-spacing:1.6px;text-transform:uppercase}.book-toolbar-title i{font-style:normal;color:#5c7180;margin:0 14px}.book-tools{display:flex;align-items:center;gap:24px}#book-index{position:relative}#book-index summary{font-weight:400;list-style:none;cursor:pointer}#book-index summary::-webkit-details-marker{display:none}#book-index summary span{margin-left:9px}#book-index nav{position:absolute;top:44px;right:0;min-width:280px;background:#f8fbfc;border:1px solid #d8e3e8;border-radius:8px;box-shadow:0 15px 50px #102f4655;padding:14px;color:#153447}#book-index a{display:block;text-decoration:none;color:inherit;font-size:13px;line-height:1.4;padding:10px 12px;border-radius:4px}#book-index a:hover{background:#e3f4f1}.open-book{position:relative;max-width:1080px;margin:auto;background:var(--paper-warm);background-image:linear-gradient(90deg,#d8e3e8aa 0,#f8fbfc 12px,#ffffff 36px,#ffffff 97%,#e3f4f1 100%);box-shadow:0 28px 90px #102f4666,5px 0 0 #d8e3e8,9px 0 0 #91aeb9,12px 0 0 #153447;border-radius:3px 9px 9px 3px;transform-origin:5% 40%;isolation:isolate}.open-book:before{content:"";position:absolute;inset:0;z-index:-1;pointer-events:none;opacity:.18;background-image:url("data:image/svg+xml,%3Csvg viewBox='0 0 180 180' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.65' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Cpath fill='%23887755' opacity='.23' filter='url(%23n)' d='M0 0h180v180H0z'/%3E%3C/svg%3E")}.book-edge{position:absolute;left:17px;top:0;bottom:0;border-left:1px solid #91aeb966;border-right:1px solid #fff9;width:4px}.book-cover-page{padding:34px 68px 0 86px}.book-running-title{display:flex;justify-content:space-between;gap:16px;color:#5c7180;font:9px/1.5 system-ui;letter-spacing:2px;border-bottom:1px solid var(--book-line);padding-bottom:20px}.book-title-layout{display:grid;grid-template-columns:1.2fr 1fr;gap:22px;align-items:center;padding:54px 0 40px}.book-kicker{font:italic 16px Georgia,serif;color:#5c7180}.book-title-layout h1{font:normal clamp(38px,4.2vw,58px)/1.04 Georgia,"Times New Roman",serif;color:#153447;letter-spacing:-1.8px;margin:17px 0 22px}.book-goal{font:16px/1.7 Georgia,serif;color:#5c7180;max-width:36ch}.book-instruction{font:11px/1.8 system-ui;color:#5c7180;margin-top:25px}.workshop-art{color:#5c7180;width:100%;height:auto;max-height:320px;overflow:visible}.book-divider{display:flex;justify-content:space-between;align-items:center;gap:12px;border-block:1px solid var(--book-line);padding:16px 0;font:9px system-ui;letter-spacing:1.7px;text-transform:uppercase;color:#5c7180}.book-divider span:nth-child(2){font-size:18px;color:#5c7180}.book-content{max-width:794px;margin:auto;padding:24px 45px 0 60px}.book-content>[data-content-block]:empty{display:none}.book-content .lesson-paragraph{font:18px/1.9 Georgia,"Times New Roman",serif;color:#153447;margin:18px 0;max-width:none}.book-section-heading{position:relative;margin:64px 0 24px;scroll-margin-top:98px}.book-section-heading:before{content:attr(data-section);position:absolute;left:-52px;top:7px;font:11px/1.8 system-ui;letter-spacing:1px;color:#5c7180}.book-section-heading h2{font:normal 32px/1.15 Georgia,serif;color:#153447;letter-spacing:-.7px;margin:0}.book-content .inline-media{background:#f8fbfc;border:1px solid #d8e3e8;padding:24px 27px;margin:24px 0 36px;border-radius:8px;transition:box-shadow .7s}.book-content .inline-media h3{font:normal 22px/1.35 Georgia,serif;margin:0 0 10px}.book-content .inline-media p{font-size:12px;color:#5c7180;line-height:1.7}.book-content audio{height:42px;margin:14px 0 0;display:block}.book-content video{margin-top:20px}.book-content .inline-lesson-slide{margin:28px -16px 35px}.book-content .inline-lesson-slide img{border-color:#d8e3e8;border-radius:6px;background:#ffffff;height:auto;box-shadow:0 9px 25px #1534470a;transition:box-shadow .6s}.book-content .inline-lesson-slide a{display:block}.book-content .inline-lesson-slide a:hover img{box-shadow:0 10px 28px #15344720}.book-content .inline-lesson-slide figcaption{font:10px/1.7 system-ui;color:#5c7180;margin-top:10px;text-align:center}.book-content .law-exercise{position:relative;border:1px solid #d8e3e8;border-left:3px solid #91aeb9;border-radius:4px 10px 10px 4px;background:#f8fbfc;margin:30px -18px 42px;padding:29px 30px;transition:border-color .6s,box-shadow .6s}.book-content .law-exercise.in-view{border-left-color:#5c7180;box-shadow:0 10px 28px #1534470a}.book-content .law-exercise h3{font:normal 24px/1.2 Georgia,serif;letter-spacing:-.3px;margin:13px 0 16px}.book-content .law-exercise .lesson-paragraph{font:16px/1.75 Georgia,serif;margin:12px 0}.book-content .law-exercise .small{font-size:11px;color:#5c7180}.book-content .eyebrow{font-size:9px;color:#5c7180}.book-content .law-passage{padding:8px 0;border:0;margin:12px 0 20px;line-height:2.4}.book-content .law-token{font:16px/1.6 Georgia,serif;border-color:#d8e3e8;padding:5px 8px;border-radius:4px;margin:3px 2px 3px 0}.book-content .law-token[aria-pressed=true]{background:#5c7180;color:#fff;border-color:#5c7180;box-shadow:0 2px 0 #153447}.book-content .law-exercise button[data-check],.book-content .law-exercise button[data-hint]{font-size:12px}.book-content .feedback{background:#e3f4f1;color:#153447;font-size:13px;line-height:1.65;padding:14px}.book-content .lesson-references{border-color:var(--book-line);margin-top:52px;padding-top:25px}.book-content .lesson-references h3{font:normal 22px Georgia,serif}.book-content .lesson-references ul{list-style:none;padding:0}.book-content .lesson-references li{padding:5px 0;font-size:12px;line-height:1.6}.book-content .lesson-references a{color:#5c7180;text-decoration-color:#91aeb9;text-underline-offset:4px;overflow-wrap:anywhere}.book-finish{max-width:710px;margin:0 auto;padding:60px 46px 48px 60px;text-align:center;scroll-margin-top:90px}.book-end-mark{display:block;color:#5c7180;font-size:25px}.book-finish h2{font:normal 30px/1.25 Georgia,serif;letter-spacing:-.6px;margin:23px 0 18px}.book-finish p{font:16px/1.8 Georgia,serif;color:#5c7180;margin-bottom:26px}.book-finish button{font-size:13px}.book-colophon{display:block;font:9px system-ui;letter-spacing:1.6px;text-transform:uppercase;color:#5c7180;margin-top:56px}.book-bottom{position:fixed;z-index:20;bottom:0;left:0;right:0;height:80px;display:flex;align-items:center;justify-content:space-between;gap:20px;padding:10px 36px;background:linear-gradient(0deg,#102f46 65%,#102f46ee);border-top:1px solid #e3f4f11a;color:#e3f4f1}.nellie-presence{display:flex;align-items:center;gap:12px;background:transparent;border:0;padding:0;color:#e3f4f1;text-align:left}.nellie-presence:hover{background:transparent;border:0;color:white}.nellie-presence .avatar{width:42px;height:42px;background:#d8e3e8}.nellie-presence>span{display:flex;flex-direction:column;gap:5px}.nellie-presence strong{font-size:12px;font-weight:550}.nellie-presence small{font-size:10px;color:#d8e3e8;font-weight:400}.nellie-presence .help-plus{display:grid;place-items:center;width:23px;height:23px;border:1px solid #91aeb966;border-radius:50%;margin-left:12px;font-size:16px;font-weight:300}.book-bottom .time-control{color:#d8e3e8;font-size:10px}.book-bottom .text-button{color:#e3f4f1}.book-help{position:fixed;z-index:25;left:32px;bottom:95px;width:360px;max-width:calc(100vw - 40px);padding:23px;background:#f8fbfc;border:1px solid #d8e3e8;border-radius:14px;box-shadow:0 16px 60px #102f4666;font-size:14px;line-height:1.7}.book-help>div{display:flex;justify-content:space-between;align-items:center;gap:10px}.book-help strong{font-size:13px}.book-help #close-help{border:0;background:transparent;padding:0 6px;font-size:24px}.book-help label{font-size:12px;font-weight:600;display:block;margin:18px 0 8px}.book-help textarea{min-height:90px;height:96px;font-size:14px;background:#ffffff}.book-help p.small{font-size:10px}.book-help #continue-reading{font-size:12px}.time-note{position:fixed;bottom:96px;right:26px;z-index:25;max-width:360px;padding:18px 44px 18px 20px;border-radius:10px;background:#f8fbfc;color:#153447;box-shadow:0 10px 35px #102f4655;font-size:13px}.time-note button{position:absolute;right:10px;top:9px;border:0;background:transparent;padding:4px;font-size:23px}.figure-dialog{width:min(1200px,94vw);max-height:94vh;border:0;border-radius:8px;padding:18px;background:#ffffff;box-shadow:0 20px 100px #0006}.figure-dialog::backdrop{background:#102f46dc;backdrop-filter:blur(5px)}.figure-dialog img{display:block;width:100%;height:auto;max-height:78vh;object-fit:contain}.figure-dialog button{display:block;margin:0 0 14px auto;font-size:12px}.book-section-heading:focus,.book-finish:focus,#activity:focus,#book-title:focus{outline:none}
/* Brief motion tied to deliberate actions; nothing is hidden pending animation. */
.open-book.opening{animation:book-open 1.1s cubic-bezier(.2,.7,.25,1) both}.opening .wheel{animation:wheel-turn 1.7s ease-out both;transform-box:fill-box;transform-origin:center}.opening .window-glint{animation:glint 1.8s ease-out both}.answer-received{animation:answer-pulse .7s ease-out}@keyframes book-open{0%{transform:perspective(2000px) rotateY(-24deg) scale(.95);filter:brightness(.85)}100%{transform:perspective(2000px) rotateY(0) scale(1);filter:brightness(1)}}@keyframes wheel-turn{from{transform:rotate(-50deg)}to{transform:rotate(0)}}@keyframes glint{0%,30%{opacity:.25}70%{opacity:1}100%{opacity:.7}}@keyframes answer-pulse{0%{box-shadow:0 0 0 0 #5c718055}100%{box-shadow:0 0 0 10px #5c718000}}.motion-off *,.motion-off *:before,.motion-off *:after{animation:none!important;transition:none!important;scroll-behavior:auto!important}
@media(min-width:1500px){.book-world{padding-top:112px}.book-title-layout{padding-block:65px}.book-cover-page{padding-top:42px}}
@media(max-width:900px){.book-world{padding:86px 24px 110px}.book-toolbar{padding:0 24px}.book-toolbar-title{display:none}.book-cover-page{padding:28px 44px 0 58px}.book-title-layout{gap:5px;grid-template-columns:1.3fr 1fr;padding:40px 0 26px}.book-title-layout h1{font-size:43px}.book-content{padding:20px 66px}.book-section-heading:before{left:-34px}.book-bottom{padding-inline:24px}.book-finish{padding-inline:60px}}
@media(max-width:600px){.coach-header{padding:20px}.coach-header span{display:none}.coach-header img{width:82px}.coach-header .library-link{font-size:11px}.chat-shell{margin-top:24px;padding:0 22px 34px}.conversation-heading{margin-top:27px}.conversation-heading h1{font-size:34px}.message p{font-size:16px}.chat-foot{flex-direction:column;gap:6px}.prototype-info{text-align:left}.user-message{margin-left:25px}#activity>h2{font-size:27px}.phase-actions{gap:8px}.phase-actions button{font-size:13px}.round-summary li{gap:10px}.round-summary li span{min-width:70px}.book-world{padding:77px 12px 104px}.book-toolbar{height:59px;padding:0 17px;gap:12px}.book-toolbar button,.book-toolbar summary{font-size:11px}.book-tools{gap:17px}#book-index nav{right:-100px;max-width:calc(100vw - 34px);min-width:265px;top:40px}.book-cover-page{padding:25px 24px 0 31px}.book-running-title{font-size:7px;letter-spacing:1.1px;padding-bottom:15px}.book-title-layout{display:block;padding:30px 0 22px;position:relative}.book-title-layout h1{font-size:42px;line-height:1.06;letter-spacing:-1.1px;max-width:340px}.book-kicker{font-size:15px}.book-goal{font-size:16px;max-width:none}.book-instruction{font-size:11px}.workshop-art{display:block;width:175px;margin:-22px 0 0 auto;height:146px}.book-divider{font-size:7px;letter-spacing:1px;gap:8px;padding:13px 0}.book-divider span:last-child{max-width:125px;text-align:right;line-height:1.6}.book-content{padding:15px 28px 0 31px}.book-content .lesson-paragraph{font-size:17px;line-height:1.85;margin-block:18px}.book-section-heading{margin:48px 0 22px;padding-top:22px}.book-section-heading:before{left:0;top:0;font-size:9px}.book-section-heading h2{font-size:28px;line-height:1.15}.book-content .inline-media{padding:19px 16px;margin:23px -7px 30px}.book-content .inline-media h3{font-size:21px}.book-content .inline-media p{font-size:11px}.book-content .inline-lesson-slide{margin:24px -12px 29px}.book-content .inline-lesson-slide figcaption{font-size:9px}.book-content .law-exercise{padding:23px 17px;margin:26px -11px 34px}.book-content .law-exercise h3{font-size:23px}.book-content .law-exercise .lesson-paragraph{font-size:16px}.book-content .law-token{font-size:16px;max-width:100%;text-align:left;line-height:1.75;padding:5px 6px}.book-content .law-exercise .row{gap:8px}.book-content .law-exercise .row button{padding:10px 13px}.book-content .lesson-references a{font-size:11px}.book-finish{padding:44px 28px 35px 31px}.book-finish h2{font-size:28px}.book-finish p{font-size:16px}.book-finish button{font-size:12px;line-height:1.5}.book-colophon{font-size:8px;margin-top:40px}.book-bottom{height:77px;padding:10px 17px;gap:8px}.nellie-presence{gap:9px}.nellie-presence .avatar{width:36px;height:36px}.nellie-presence strong{font-size:11px}.nellie-presence small{font-size:9px;max-width:140px;line-height:1.4}.nellie-presence .help-plus{display:none}.book-bottom .time-control{flex-direction:column;gap:0;align-items:flex-end;font-size:9px}.book-bottom .text-button{font-size:9px;padding:5px 0}.book-help{left:17px;bottom:88px;width:calc(100vw - 34px);max-width:360px;padding:20px}.time-note{left:17px;right:17px;bottom:88px;max-width:none}.figure-dialog{padding:12px}.book-edge{left:9px;width:3px}.open-book{background-image:linear-gradient(90deg,#d8e3e8 0,#ffffff 21px,#ffffff 98%,#e3f4f1 100%);box-shadow:0 15px 50px #102f4655,3px 0 0 #d8e3e8,5px 0 0 #91aeb9}}
@media(prefers-reduced-motion:reduce){*,*:before,*:after{animation:none!important;transition:none!important;scroll-behavior:auto!important}}
@media print{body[data-world=book]{background:white}.book-world{padding:0}.book-toolbar,.book-bottom,.book-help,.time-note,.book-finish button{display:none}.open-book{box-shadow:none;background:white;max-width:none}.book-content{max-width:850px}.open-book:before{display:none}.book-content .law-token{display:inline}.book-cover-page{padding-top:0}}
/* A visible cover turns away once as the reader deliberately opens the book. */
.open-book.opening:after{content:"NELL\A \A Das Lernbuch\A \A 01";white-space:pre;text-align:center;display:grid;place-content:center;position:absolute;z-index:3;top:0;left:0;width:100%;height:min(820px,calc(100vh - 150px));background:linear-gradient(90deg,#102f46,#153447 3%,#153447 7%,#153447);color:#d8e3e8;border:1px solid #91aeb94d;border-radius:3px 9px 9px 3px;box-shadow:12px 10px 40px #102f4644;font:32px/1.2 Georgia,serif;letter-spacing:3px;transform-origin:left;backface-visibility:hidden;pointer-events:none;animation:cover-turn 1.05s cubic-bezier(.45,.05,.18,1) forwards}@keyframes cover-turn{0%,8%{transform:perspective(1800px) rotateY(0);opacity:1}90%{opacity:1}100%{transform:perspective(1800px) rotateY(-110deg);opacity:0}}.motion-off .open-book.opening:after{display:none}@media(prefers-reduced-motion:reduce){.open-book.opening:after{display:none}}
/* The coaching surface is one persistent chat with an independently scrolling history. */
body[data-world=chat]{overflow:auto;background:#f8fbfc}#chat-surface{height:100dvh;display:flex;flex-direction:column;overflow:hidden}#chat-surface .coach-header{width:100%;max-width:none;min-height:78px;margin:0;padding:14px 30px;border-bottom:1px solid #e3f4f1;background:#ffffff;flex-shrink:0;display:flex;align-items:center;gap:30px}#chat-surface .coach-header>a>img{width:78px}#chat-surface .coach-presence{gap:11px}#chat-surface .coach-presence .avatar{width:40px;height:40px}#chat-surface .coach-presence span{font-size:11px;letter-spacing:0;text-transform:none}#chat-book{margin-left:auto;font-size:12px}.coach-header .library-link{margin-left:0}.chat-scroll{flex:1;min-height:0;overflow-y:auto;overscroll-behavior:contain;scrollbar-gutter:stable}.chat-scroll .chat-shell{max-width:850px;margin:0 auto;padding:30px 32px 28px}.chat-topic{margin:0 0 26px 47px}.chat-topic h1{font:normal 27px/1.2 Georgia,serif;margin:8px 0;color:#153447}.chat-topic .eyebrow{font-size:9px}.dialog-turn{display:flex;align-items:flex-start;gap:11px;max-width:100%;margin:0 0 20px;outline:none}.dialog-turn>.avatar{width:35px;height:35px;margin-top:3px}.turn-body{max-width:calc(100% - 48px);min-width:0;background:#fff;border:1px solid #e3f4f1;border-radius:3px 17px 17px 17px;padding:13px 18px 15px;box-shadow:0 2px 3px #15344703}.turn-body>.message-author{font-size:10px;letter-spacing:.15px;color:#5c7180}.turn-body>p,.turn-attachment>.case-question{font-size:15px;line-height:1.65;margin:5px 0 0;white-space:pre-wrap;overflow-wrap:anywhere}.user-turn{justify-content:flex-end;margin-left:50px}.user-turn .turn-body{max-width:88%;background:#e3f4f1;border-color:#e3f4f1;border-radius:17px 3px 17px 17px}.turn-attachment:empty{display:none}.turn-attachment .lesson-paragraph{font:15px/1.65 system-ui,sans-serif;margin:10px 0;letter-spacing:0}.turn-attachment>.case-question{border-top:1px solid #e3f4f1;padding-top:10px;margin-top:10px;color:#153447}.dialog-actions{display:flex;flex-wrap:wrap;gap:8px;margin:2px 0 0 47px}.dialog-actions button{font-size:12px;line-height:1.4;font-weight:500;padding:10px 14px;border-radius:18px;background:#ffffff;border:1px solid #d8e3e8;color:#153447}.dialog-actions button.primary{border-radius:18px}.dialog-actions button:disabled{opacity:.55;cursor:wait}.composer-dock{flex-shrink:0;width:100%;max-width:850px;margin:0 auto;padding:12px 32px 15px;background:#f8fbfc}.composer-dock .composer{margin:0;border-top:0;padding:0}.composer-dock .composer>label{margin:0 0 7px;font-size:11px}.composer-dock .composer>div{padding:7px 10px 6px 15px;box-shadow:0 3px 16px #15344709}.composer-dock .composer textarea{height:43px;min-height:43px;max-height:100px;width:100%;font:14px/1.5 system-ui;resize:none}.composer-dock .composer .send-button{width:33px;height:33px;margin-bottom:4px}.composer-dock .chat-foot{margin-top:7px;align-items:center}.composer-dock .time-control{font-size:10px}.composer-dock .prototype-info{font-size:10px}.composer-dock .prototype-info summary{padding:4px 0}.composer-dock .prototype-info[open]{position:relative}.composer-dock .prototype-info[open]>p,.composer-dock .prototype-info[open]>a{display:none}.composer-dock .prototype-info[open]:after{content:"Nellies Antworten sind vorbereitet. Freie Fachfragen werden noch nicht individuell beantwortet. Dein Verlauf bleibt in dieser Browser-Sitzung.";position:absolute;bottom:28px;right:0;width:280px;background:#fff;border:1px solid #e3f4f1;padding:16px;border-radius:10px;box-shadow:0 8px 30px #102f4622;text-align:left;font-size:12px;line-height:1.6;z-index:10}.dialogue-exercise .law-exercise{padding:0;margin:14px 0 0;border:0;border-top:1px solid #e3f4f1;border-radius:0;background:transparent;box-shadow:none}.dialogue-exercise .law-exercise>.eyebrow,.dialogue-exercise .law-exercise>h3{display:none}.dialogue-exercise .law-exercise .lesson-paragraph{font-size:15px;font-weight:550}.dialogue-exercise .law-exercise label{font-size:14px;line-height:1.5;padding:9px 10px;border-radius:8px;background:#f8fbfc;margin:7px 0;display:flex;align-items:flex-start;gap:9px}.dialogue-exercise .law-exercise label input{flex-shrink:0;margin-top:4px;accent-color:#087f84}.dialogue-exercise .law-exercise .row{gap:8px;margin-top:15px}.dialogue-exercise .law-exercise button{font-size:12px;padding:8px 12px}.dialogue-exercise .feedback{display:none}.dialogue-exercise .hint{font-size:13px;line-height:1.6}.past-question{font-size:13px;line-height:1.5;margin-top:10px}.past-question>span{display:none}.past-question p{margin:6px 0}.past-question small{color:#5c7180;font-size:10px}.reflection-prompt>p{font-size:15px;line-height:1.6}.reflection-prompt details,.chat-summary details{font-size:12px;line-height:1.6}.chat-summary{font-size:13px;line-height:1.6;margin-top:12px}.chat-summary li{margin-bottom:10px}.chat-summary small{display:block}.chat-summary p{font-size:12px}.dialog-turn:focus-visible{outline:2px solid #d8e3e8;outline-offset:4px;border-radius:12px}
/* A viewport-level cover makes both transitions visible from every reading position. */

@media(max-width:600px){#chat-surface .coach-header{min-height:65px;padding:10px 16px;gap:13px}#chat-surface .coach-header>a>img{width:53px}#chat-surface .coach-presence .avatar{width:34px;height:34px}#chat-surface .coach-presence strong{font-size:14px}#chat-surface .coach-presence span{display:none}#chat-surface .library-link{font-size:10px}#chat-book{font-size:10px;max-width:80px;padding:2px;line-height:1.5}.chat-scroll .chat-shell{padding:22px 14px 20px}.chat-topic{margin:0 0 21px 0}.chat-topic h1{font-size:24px}.dialog-turn{gap:7px;margin-bottom:16px}.dialog-turn>.avatar{width:27px;height:27px}.turn-body{max-width:calc(100% - 34px);padding:11px 13px 13px;border-radius:3px 14px 14px 14px}.turn-body>p,.turn-attachment .lesson-paragraph,.turn-attachment>.case-question{font-size:14px;line-height:1.6}.user-turn{margin-left:25px}.user-turn .turn-body{max-width:90%}.dialog-actions{margin-left:34px;gap:7px}.dialog-actions button{font-size:11px;padding:9px 11px}.composer-dock{padding:10px 16px max(10px,env(safe-area-inset-bottom))}.composer-dock .chat-foot{flex-direction:row;gap:8px;align-items:center}.composer-dock .time-control{gap:10px;font-size:9px}.composer-dock .text-button{font-size:9px}.composer-dock .prototype-info{font-size:9px}.composer-dock .prototype-info[open]:after{width:245px}.dialogue-exercise .law-exercise label{font-size:13px;padding:8px}.dialogue-exercise .law-exercise .lesson-paragraph{font-size:14px}}
@media(max-width:360px){#chat-surface .library-link{display:none}.dialog-turn>.avatar{width:24px;height:24px}.turn-body{max-width:calc(100% - 31px);padding-inline:11px}.dialog-actions{margin-left:31px}}
@media(prefers-reduced-motion:reduce){}
.dialogue-exercise .feedback:not(:empty){display:block;background:#e3f4f1;color:#153447;font-size:13px;line-height:1.6;padding:10px;border-radius:8px}@media(max-width:600px){}
/* Interactive question cards: one question, selected answer and Nellie's inline response. */
.exercise-turn>.turn-body{width:690px;background:transparent;border:0;padding:0;box-shadow:none}.exercise-turn>.turn-body>.message-author{padding-left:2px}.exercise-turn>.turn-body>p{margin:6px 2px 13px}.dialogue-exercise .law-exercise.question-card,.question-card.past-card{overflow:hidden;border:1px solid #d8e3e8;border-radius:17px;margin:0;padding:20px;background:#fff;box-shadow:0 5px 18px #1534470a;transition:border-color .2s,box-shadow .2s}.card-topline{display:flex;justify-content:space-between;align-items:center;gap:12px;margin:0 0 15px;font-size:10px;line-height:1.4}.card-category{display:flex;gap:7px;align-items:center;font-weight:650;letter-spacing:1.1px;text-transform:uppercase;color:#5c7180}.card-category>span{font-size:17px;line-height:1}.card-step{font-size:10px;color:#5c7180;background:#f8fbfc;border-radius:20px;padding:5px 9px;white-space:nowrap}.dialogue-exercise .question-card>.lesson-paragraph,.question-card .card-prompt{font:600 17px/1.5 system-ui,sans-serif;letter-spacing:-.15px;margin:0 0 18px;color:#153447}.dialogue-exercise .question-card fieldset{margin:0}.dialogue-exercise .question-card legend{font-size:11px;color:#5c7180;margin:0 0 5px}.dialogue-exercise .question-card label.option{display:grid;grid-template-columns:29px 1fr 17px;align-items:center;position:relative;gap:11px;padding:12px;margin:8px 0;background:#ffffff;border:1px solid #e3f4f1;border-radius:10px;color:#153447;cursor:pointer;transition:background .15s,border-color .15s,box-shadow .15s}.dialogue-exercise .question-card label.option>input{position:absolute;opacity:0;width:1px;height:1px;margin:0;padding:0}.dialogue-exercise .question-card label.option>span:not(.choice-letter):not(.choice-status){grid-column:2;grid-row:1;font-size:14px;line-height:1.5}.choice-letter{width:28px;height:28px;flex-shrink:0;display:grid;place-items:center;border:1px solid #e3f4f1;border-radius:7px;background:#fff;font:600 11px system-ui;color:#5c7180;grid-column:1;grid-row:1}.choice-status{grid-column:3;grid-row:1;text-align:center;font-size:13px;color:#5c7180}.dialogue-exercise .question-card label.option:hover{background:#f8fbfc;border-color:#91aeb9}.dialogue-exercise .question-card label.option:focus-within{outline:3px solid #087f84;outline-offset:2px}.dialogue-exercise .question-card label.option.is-selected{border-color:#5c7180;background:#f8fbfc;box-shadow:0 0 0 1px #5c71801c}.question-card .is-selected .choice-letter{background:#e3f4f1;border-color:#91aeb9;color:#153447}.dialogue-exercise .question-card label.option.is-correct{border-color:#5c7180;background:#e3f4f1;box-shadow:inset 3px 0 #5c7180}.question-card .is-correct .choice-letter{background:#5c7180;border-color:#5c7180;color:#fff}.dialogue-exercise .question-card label.option.is-retry{border-color:#91aeb9;background:#f8fbfc}.question-card .is-retry .choice-status{color:#5c7180}.question-card[data-state=correct]{border-color:#91aeb9}.question-card[data-state=correct] .card-step{color:#153447;background:#e3f4f1}.question-card[data-state=correct] .option{cursor:default}.dialogue-exercise .question-card[data-state=correct] label.option:not(.is-selected){opacity:.55}.dialogue-exercise .question-card .row{gap:9px;align-items:center;flex-wrap:wrap;margin:18px 0 0;padding-top:14px;border-top:1px solid #e3f4f1}.dialogue-exercise .question-card .row>button{border-radius:9px;font-size:12px;line-height:1.4;padding:10px 15px}.question-card .card-continue{margin-left:auto;min-height:38px}.dialogue-exercise .question-card [data-hint]{border:0;background:transparent;color:#5c7180}.dialogue-exercise .question-card [data-check]:disabled{opacity:.55;cursor:wait}.dialogue-exercise .question-card .feedback:empty{display:none}.dialogue-exercise .question-card .feedback:not(:empty),.question-card .card-feedback{display:block;margin:15px 0 0;padding:13px 14px;border:1px solid #e3f4f1;border-radius:11px;background:#f8fbfc;color:#153447;font-size:13px;line-height:1.6}.question-card[data-state=correct] .card-feedback{background:#f8fbfc;border-color:#e3f4f1;color:#153447}.question-card[data-state=retry] .card-feedback,.question-card[data-state=error] .card-feedback,.question-card[data-state=open] .card-feedback{background:#f8fbfc;border-color:#d8e3e8;color:#153447}.card-feedback-heading{display:flex;gap:8px;align-items:center;min-height:27px}.card-feedback-heading>strong{font-size:13px;font-weight:650}.card-result-icon{display:grid;place-items:center;border-radius:50%;width:22px;height:22px;background:#e3f4f1;color:#5c7180;font-size:14px;flex-shrink:0}.question-card[data-state=retry] .card-result-icon,.question-card[data-state=open] .card-result-icon{background:#d8e3e8;color:#5c7180}.question-card .card-feedback>p{font:12px/1.65 system-ui;margin:6px 0 0;white-space:pre-wrap}.question-card .card-feedback .card-inline-hint{margin-top:9px}.card-reaction{margin-left:auto;display:flex;align-items:center;gap:5px;padding:4px 8px;border-radius:20px;border:1px solid #d8e3e8;background:#ffffff;box-shadow:0 2px 5px #5c71800d;transform-origin:bottom left;animation:nellie-thumb .5s ease-out both}.card-reaction>span{font-size:20px;line-height:1.2}.card-reaction small{font:600 9px system-ui;color:#5c7180}.dialogue-exercise .question-card .hint{background:#f8fbfc;padding:11px 13px;margin-top:12px;border-radius:9px}.dialogue-exercise .question-card .hint .lesson-paragraph{font-size:12px;font-weight:400;margin:4px 0}.question-card.past-card{padding:16px 18px;box-shadow:none}.past-card .card-topline{margin-bottom:10px}.past-card .card-prompt{font-size:14px;margin-bottom:12px}.past-card-answer{display:flex;align-items:center;gap:10px;border:1px solid #e3f4f1;background:#f8fbfc;padding:10px;border-radius:9px}.past-card-answer>div{flex:1;min-width:0}.past-card-answer small{font-size:9px;color:#5c7180}.past-card-answer p{font:13px/1.5 system-ui;margin:3px 0;color:#153447}.past-card-answer>span:last-child{color:#5c7180}.past-card .card-feedback{padding:10px 12px}.card-open-note{font-size:12px;color:#5c7180}@keyframes nellie-thumb{0%{transform:scale(.85) rotate(-8deg);opacity:0}65%{transform:scale(1.08) rotate(3deg);opacity:1}100%{transform:scale(1) rotate(0);opacity:1}}
@media(max-width:600px){.dialogue-exercise .law-exercise.question-card,.question-card.past-card{padding:15px 12px;border-radius:13px}.exercise-turn>.turn-body>p{font-size:14px;margin-bottom:10px}.card-topline{margin-bottom:12px;gap:8px}.card-category{font-size:9px;letter-spacing:.7px}.card-step{font-size:9px;padding:4px 7px}.dialogue-exercise .question-card>.lesson-paragraph{font-size:15px;margin-bottom:13px}.dialogue-exercise .question-card label.option{grid-template-columns:25px 1fr 12px;gap:8px;padding:10px 9px;margin:7px 0}.dialogue-exercise .question-card label.option>span:not(.choice-letter):not(.choice-status){font-size:13px}.choice-letter{width:25px;height:25px;font-size:10px}.dialogue-exercise .question-card .row{gap:7px;margin-top:12px;padding-top:12px}.dialogue-exercise .question-card .row>button{font-size:11px;padding:9px 11px}.dialogue-exercise .question-card .feedback:not(:empty),.question-card .card-feedback{padding:11px 10px;margin-top:12px}.card-feedback-heading{gap:6px}.card-feedback-heading>strong{font-size:12px}.card-reaction{padding:3px 6px;gap:3px}.card-reaction small{font-size:8px}.card-reaction>span{font-size:18px}.card-result-icon{width:20px;height:20px}.question-card .card-feedback>p{font-size:12px}.past-card .card-prompt{font-size:13px}}






.dialogue-exercise .question-card .options{display:grid;gap:8px}.dialogue-exercise .question-card label.option{margin:0}.dialogue-exercise .question-card[data-state=correct] label.option{cursor:default}.dialogue-exercise .question-card[data-state=correct] .feedback:not(:empty){background:#f8fbfc;border-color:#e3f4f1;color:#153447}.dialogue-exercise .question-card[data-state=retry] .feedback:not(:empty),.dialogue-exercise .question-card[data-state=error] .feedback:not(:empty){background:#f8fbfc;border-color:#d8e3e8;color:#153447}

/* The book opens inside Nellie's growing message, with the conversation still visible. */
.book-gesture-turn>.turn-body{overflow:hidden;box-sizing:border-box;max-width:calc(100% - 46px);will-change:width,height}
























@media(max-width:600px){.book-gesture-turn>.turn-body{max-width:calc(100% - 34px)}}
/* NELL: documented navy / petrol / cool-white palette. Subject book colours are defined separately in nell-book.css. */
:root{--nell-navy:#102f46;--nell-ink:#153447;--nell-accent:#087f84;--nell-surface:#ffffff;--nell-background:#f8fbfc;--nell-tint:#e3f4f1;--nell-line:#d8e3e8;--nell-muted:#5c7180}
body{background:var(--nell-background);color:var(--nell-ink)}

.book-running-title,.book-kicker,.eyebrow{color:#087f84}.book-cover-page .book-kicker{color:#087f84}
.primary{background:#087f84!important;border-color:#087f84!important;color:#fff!important}.primary:hover{background:#066469!important}
#exemption-practice{scroll-margin-top:100px;margin:25px 0 38px;border:1px solid #d8e3e8;border-radius:16px;padding:20px;background:#fff}
.exemption-steps{display:flex;flex-wrap:wrap;gap:7px}.exemption-steps button{font:600 11px/1.4 system-ui;padding:9px 11px;border:1px solid #d8e3e8;border-radius:20px;color:#153447;background:#f8fbfc}.exemption-steps button[aria-pressed=true]{background:#087f84;color:#fff;border-color:#087f84}
.exemption-progress{font:12px/1.5 system-ui;color:#5c7180;margin:15px 0}.book-content #exemption-practice .law-exercise{border:0;border-radius:0;padding:0;margin:0;box-shadow:none;background:#fff}
.exemption-navigation{display:flex;justify-content:space-between;gap:10px;margin-top:20px;padding-top:16px;border-top:1px solid #d8e3e8}.exemption-navigation button{font:600 12px/1.5 system-ui;color:#087f84;padding:8px;border:0;background:#e3f4f1;border-radius:8px}.exemption-navigation button:disabled{opacity:.4}
.book-content .law-token[aria-pressed=true]{background:#e3f4f1;border-color:#087f84;color:#153447}
.book-content .law-exercise[data-state=correct] .feedback,.question-card[data-state=correct] .card-feedback{background:#edf6ef!important;border:1px solid #bfd9c5!important;color:#255d39!important}
.book-content .law-exercise[data-state=retry] .feedback,.question-card[data-state=retry] .card-feedback{background:#fff5e6!important;color:#754b16!important}
.book-content .law-exercise .feedback:not(:empty){border-radius:10px;padding:13px;margin-top:16px;font:14px/1.6 system-ui}
.book-content .law-exercise .hint{color:#5c7180}.exemption-examples h3:focus{outline:none}
@media(max-width:600px){#exemption-practice{padding:13px;margin-inline:-5px}.exemption-steps button{font-size:10px;padding:8px}.exemption-navigation button{font-size:11px}.exemption-navigation{gap:6px}}

.dialog-actions .card-external-hint{flex-basis:100%;padding:14px 16px;border:1px solid #d8e3e8;border-radius:10px;background:#f8fbfc;color:#153447;font-size:13px;line-height:1.6}.card-external-hint .lesson-paragraph{margin:5px 0;font-size:13px}

.book-statistics{margin:4px 0 17px;padding:18px;border:1px solid #d8e3e8;border-radius:13px;background:#fff;color:#153447}.book-statistics h3{margin:0 0 16px;font:600 16px/1.4 system-ui}.book-stat-numbers{display:grid;grid-template-columns:1fr 1fr;gap:16px}.book-stat-numbers strong{display:block;font-size:23px;color:#087f84}.book-stat-numbers span{display:block;margin-top:4px;font-size:11px;line-height:1.5}.book-statistics>p{font-size:12px;margin:14px 0}.book-statistics summary{font-size:12px;cursor:pointer}.book-statistics ul{list-style:none;padding:0;margin:10px 0}.book-statistics li{display:flex;gap:12px;justify-content:space-between;padding:9px 0;border-bottom:1px solid #e3f4f1;font-size:12px}.book-statistics li strong{white-space:nowrap;font-size:11px}.stat-correct{color:#255d39}.stat-retry{color:#754b16}.stat-open{color:#5c7180}.book-statistics>small{display:block;margin-top:13px;font-size:10px;line-height:1.5;color:#5c7180}@media(max-width:420px){.book-statistics{padding:13px}.book-statistics li{flex-direction:column;gap:4px}}

/* Reserve the same space before, during and after checking an answer. */
.dialogue-exercise .question-card>.lesson-paragraph{min-height:78px;margin-bottom:14px}
.dialogue-exercise .question-card label.option{min-height:76px;box-sizing:border-box}
.dialogue-exercise .question-card .card-feedback,.question-card.past-card .card-feedback{display:block;height:180px;min-height:180px;overflow-y:auto;box-sizing:border-box;margin:15px 0 0;padding:13px 14px}
.feedback-placeholder{height:100%;display:flex;align-items:center;justify-content:center;gap:12px;color:#5c7180}.feedback-placeholder>span{font-size:24px}.feedback-placeholder p{font:12px/1.6 system-ui;margin:0;max-width:240px}
.dialogue-exercise .question-card .row{height:64px;min-height:64px;box-sizing:border-box;margin-top:18px;flex-wrap:nowrap}
.card-finished-note{font-size:11px;color:#5c7180}.dialogue-exercise .question-card.past-card{padding:20px;box-shadow:0 5px 18px #1534470a}.past-card fieldset{opacity:1}.past-card label.option{cursor:default}
.check-review{height:610px;display:flex;flex-direction:column}.review-page{flex:1;min-height:0;overflow-y:auto;padding:3px 2px;outline-offset:-2px}.review-page h3{font:600 17px/1.5 system-ui;margin:8px 0 18px}.review-page p{font-size:13px;line-height:1.65}.review-page .review-score{font-size:42px;line-height:1.2;color:#087f84;font-weight:650;margin:16px 0}.review-overview{list-style:none;padding:0;margin:20px 0}.review-overview li{display:flex;justify-content:space-between;gap:16px;padding:14px 0;border-bottom:1px solid #e3f4f1;font-size:12px}.review-overview strong{white-space:nowrap;font-size:11px}.review-answer,.review-result{padding:14px;border:1px solid #d8e3e8;border-radius:10px;margin:14px 0;background:#f8fbfc}.review-answer small,.review-question-number{color:#5c7180}.review-navigation{display:flex;align-items:center;justify-content:space-between;gap:10px;border-top:1px solid #d8e3e8;padding-top:14px;margin-top:14px}.review-navigation button{min-width:44px;min-height:44px}.review-navigation [data-review-prev],.review-navigation [data-review-next]{font-size:25px;line-height:1}.review-navigation span{font-size:11px;color:#5c7180}
@media(max-width:700px){.dialogue-exercise .question-card label.option{min-height:96px}.dialogue-exercise .question-card>.lesson-paragraph{min-height:105px}.dialogue-exercise .question-card .card-feedback{height:200px;min-height:200px}.check-review{height:650px}.review-overview li{flex-direction:column;gap:5px}}
.dialogue-exercise .question-card legend{height:36px;box-sizing:border-box}.question-card.past-card .card-topline{margin-bottom:15px}

.dialogue-exercise .check-review{height:610px;box-sizing:border-box;padding:20px;border:1px solid #d8e3e8;border-radius:17px;background:#fff;box-shadow:0 5px 18px #1534470a;overflow:hidden}@media(max-width:700px){.dialogue-exercise .check-review{height:650px;padding:16px}}

/* Criteria-based feedback stays inside Nellie's conversation. */
.ai-review .card-topline{flex-wrap:wrap;gap:8px}.ai-own-answer{font-size:13px;margin:14px 0;color:#5c7180}.ai-own-answer p{white-space:pre-wrap;overflow-wrap:anywhere}.ai-summary{font-size:16px;line-height:1.65}.ai-criteria{list-style:none;padding:0;margin:18px 0}.ai-criteria li{padding:14px 0;border-top:1px solid #d8e3e8}.ai-criteria li>div{display:flex;justify-content:space-between;gap:8px;flex-wrap:wrap}.ai-criteria li>div>span{font-size:12px;white-space:nowrap;color:#5c7180}.ai-criteria li[data-status=met]>div>span{color:#255d39}.ai-criteria li[data-status=incorrect]>div>span{color:#9a491c}.ai-criteria p{font-size:14px;line-height:1.6;margin:7px 0 0}.ai-criteria blockquote{margin:8px 0 0;padding-left:12px;border-left:2px solid #c4d9dc;color:#5c7180;font-size:13px;overflow-wrap:anywhere}.ai-next{background:#f0f7f8;padding:14px;border-radius:10px;font-size:14px;line-height:1.6}.ai-model-answer{border:1px solid #d8e3e8;border-radius:10px;padding:14px;margin:16px 0}.ai-model-answer summary{cursor:pointer;font-weight:600;color:#087f84}.ai-model-answer p{line-height:1.7;font-size:14px}.ai-review{overflow-wrap:anywhere}.ai-review .small{font-size:11px;color:#5c7180;margin-bottom:0}
.correction-score{margin:20px 0;padding:18px 22px;border:1px solid var(--line);border-radius:8px;background:var(--wash)}
.correction-score h3{margin:0 0 8px}.correction-score>p{margin:8px 0}
.correction-score>details{border-top:1px solid var(--line);padding:10px 0}
.correction-score>details>summary{display:flex;flex-wrap:wrap;gap:8px;justify-content:space-between;cursor:pointer;font-size:1rem}
.correction-score>details>summary>span:before{content:'▸ ';color:var(--teal)}.correction-score>details[open]>summary>span:before{content:'▾ '}
.correction-score>details>summary>strong{white-space:nowrap}.correction-score li{margin:10px 0}.correction-score li p{margin:4px 0;font-size:.95rem}
.correction-sheet{position:relative;margin:20px 0 16px;padding:18px 22px 12px;border:1px solid #e1dbca;border-radius:8px;background:#fffdf7;box-shadow:0 3px 10px #57462a09}
.correction-heading{display:flex;align-items:center;justify-content:space-between;gap:12px;font-size:11px;letter-spacing:.03em;color:#786a53;margin-bottom:16px}
.correction-pen{width:30px;height:30px;flex:none;stroke:#27644d;stroke-width:1.7;fill:none;stroke-linecap:round;stroke-linejoin:round;transform:rotate(-8deg)}
.correction-text{font:400 17px/2.2 Georgia,serif;white-space:pre-wrap;overflow-wrap:anywhere;color:#243e4b}
.correction-ink[data-status=met]{text-decoration:underline;text-decoration-color:#428563;text-decoration-thickness:2px;text-underline-offset:5px;background:#e7f3e650}
.correction-ink[data-status=partial]{text-decoration:underline wavy #ab720e;text-underline-offset:5px;background:#fff1c760}
.correction-ink[data-status=incorrect]{text-decoration:line-through #b53e43;text-decoration-thickness:2px;background:#fbe6e860}
.correction-mark{display:inline-flex;vertical-align:baseline;align-items:center;justify-content:center;min-width:36px;min-height:40px;border:0!important;background:transparent!important;padding:0 5px!important;border-radius:6px;font:700 25px/1.2 "Segoe Print","Bradley Hand",cursive;transform:rotate(-8deg);cursor:pointer}
.correction-mark[data-status=met],.correction-note[data-status=met] .correction-note-sign{color:#28724a}
.correction-mark[data-status=incorrect],.correction-note[data-status=incorrect] .correction-note-sign{color:#b1303d}
.correction-mark[data-status=partial],.correction-note[data-status=partial] .correction-note-sign{color:#94600b}
.correction-mark[data-status=missing],.correction-note[data-status=missing] .correction-note-sign{color:#9d3c52}
.correction-mark:hover{background:#efe9d7!important}.correction-mark:focus-visible{outline:2px solid #176b73;outline-offset:2px}
.correction-margin{margin-top:18px;border-top:1px dashed #d9d0ba;padding-top:10px}.correction-margin>div{display:flex;align-items:center;gap:5px;font-size:13px;line-height:1.5;color:#705246}
.correction-legend{display:flex;flex-wrap:wrap;gap:5px 15px;color:#6c6a60;font:12px/1.5 system-ui;margin:20px 0 0}.correction-instruction{font:12px/1.5 system-ui;color:#6c6a60;margin:6px 0 0}
.correction-notes{display:grid;gap:6px;margin:0 0 20px}.correction-note{border-bottom:1px solid #dde6e6;padding:0 0 5px}.correction-note summary{display:flex;align-items:center;gap:12px;padding:10px 4px;cursor:pointer;list-style:none;font-size:13px;font-weight:600}.correction-note summary::-webkit-details-marker{display:none}.correction-close{margin-left:auto;font-size:19px;color:#567178}.correction-note summary small{display:block;color:#62767c;font-size:11px;font-weight:400;margin-top:3px}.correction-note-sign{font:700 24px/1.2 "Segoe Print","Bradley Hand",cursive;min-width:25px;text-align:center}.correction-note p{font-size:14px;line-height:1.7;margin:2px 4px 8px 41px}.correction-note button{margin:0 4px 10px 37px;text-align:left;white-space:normal}.correction-note:focus-within{border-color:#32938c}.ai-pending-answer{white-space:pre-wrap;overflow-wrap:anywhere;margin:18px 0;padding:14px 18px;border-left:3px solid #d3dccc;background:#fffdf7;font:16px/1.8 Georgia,serif}
.correction-book-target{outline:2px solid #c59e44;outline-offset:10px;border-radius:3px}
.correction-fresh .correction-pen{animation:correction-write .85s ease-out both}.correction-fresh .correction-mark span{animation:correction-appear .7s ease-out both;display:inline-block}
@keyframes correction-write{0%{transform:translate(-35px,6px) rotate(-18deg);opacity:0}40%{opacity:1}70%{transform:translate(-8px,-2px) rotate(0)}100%{transform:rotate(-8deg)}}
@keyframes correction-appear{0%,30%{opacity:0;transform:scale(.7)}100%{opacity:1;transform:scale(1)}}
.motion-off .correction-fresh *{animation:none!important}
@media(prefers-reduced-motion:reduce){.correction-fresh *{animation:none!important}}
@media(max-width:700px){.correction-sheet{padding:14px}.correction-text{font-size:16px}.correction-mark{min-width:40px;min-height:44px}.correction-note button{margin-left:4px}.correction-note p{margin-left:4px}}
/* Keep the learner's text in focus; open one requested margin note at a time. */
.correction-notes{display:block;margin:0}.correction-note{display:none}.correction-note[open]{display:block;margin:0 0 18px;padding:7px 12px;border:1px solid #d8e3df;border-radius:9px;background:#f5f9f7}

/* Keep the one current thought distinct from the correction sheet. */
.ai-review .ai-next{border-left:3px solid var(--accent,#b07731);padding:14px 18px;background:#fcf6e9;border-radius:0 12px 12px 0;line-height:1.65}
.coaching-progress{color:#285e45;font-size:.92rem}

/* Keep chat mode choices readable and the companion clear of the send button. */
#chat-kind,.unit-path-composer [data-message-kind]{font:inherit;font-size:13px;min-height:38px;max-width:100%;padding:7px 10px;margin:4px 0 0 6px;border:1px solid #bacfd2;border-radius:8px;color:#153447;background:#fff}#chat-kind-label[hidden]{display:none}#chat-free-status:empty{display:none}body[data-space=learning][data-world=chat]:has(#chat-surface) #nell-companion{bottom:calc(var(--nell-composer-height,220px) + 12px)}

/* Recovery information stays in page flow and never covers navigation or chat. */
#save-warning{position:static;max-width:980px;margin:18px auto 0;width:calc(100% - 40px);padding:0;border:1px solid #c9e1dd;border-radius:12px;background:#eef7f5;color:#153447;font-size:13px;overflow-wrap:anywhere}
#save-warning>details>summary{padding:13px 17px;cursor:pointer;font-weight:600;min-height:44px;line-height:1.6}
#save-warning .save-notice-content{padding:0 17px 16px}
#save-warning .save-notice-content p{margin:0 0 14px;line-height:1.65}
#save-warning .save-notice-actions{display:flex;flex-wrap:wrap;gap:8px}
#save-warning button{max-width:100%;margin:0;font-size:12px;white-space:normal;min-height:44px}
#save-warning[data-kind=error]{border-color:#d4a69d;background:#fff4ed}
body[data-world=book] #save-warning{margin-top:84px}
@media(max-width:700px){#save-warning{width:calc(100% - 24px);margin-top:72px}#save-warning .save-notice-actions{align-items:stretch}#save-warning button{flex:1 1 180px}}

/* Match the shared title illustrations; keep the small-screen image below the text. */
.book-title-layout{grid-template-columns:minmax(0,1fr) minmax(220px,.7fr)}
@media(max-width:700px){.book-title-layout{display:flex;flex-direction:column;align-items:stretch;gap:20px}.book-title-layout .nell-unit-illustration{max-width:220px;align-self:flex-end}}

/* Only U01 owns a viewport-sized chat scroller. Other journeys scroll the page. */
body[data-world=chat][data-space=learning]:has(#chat-surface){overflow:hidden}