:root{--purple:#7657d6;--purple-dark:#4a3297;--lavender:#ede7fb;--ink:#26233a;--muted:#858196;--line:#eae7f1;--bg:#f7f6fa;--orange:#ef9459;--green:#238568;--red:#c34b61;--white:#fff;--radius:20px}*{box-sizing:border-box}body{margin:0;color:var(--ink);background:var(--bg);font:14px/1.6 -apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif}button,input,select,textarea{font:inherit}button,a,select{touch-action:manipulation}button,a{ -webkit-tap-highlight-color:transparent}button{cursor:pointer}button:disabled{cursor:not-allowed;opacity:.45}button{color:inherit}a{color:inherit;text-decoration:none}button:focus-visible,a:focus-visible,input:focus-visible,select:focus-visible,textarea:focus-visible{outline:3px solid 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.count{background:#ffffff29;color:white}.sidebar-footer{margin-top:auto;padding-top:25px}.local-card{border-radius:13px;background:#faf7f2;padding:15px;font-size:11px;color:#8e7964}.local-card strong{display:block;color:#8d6946;margin-bottom:4px}.local-card .icon{width:15px;height:15px;margin-right:5px;vertical-align:middle}.main{margin-left:231px;width:calc(100% - 231px);min-width:0}.topbar{height:85px;padding:0 39px;display:flex;align-items:center;justify-content:space-between;background:#ffffffb0;border-bottom:1px solid var(--line);gap:20px}.breadcrumb{color:#9992a9;font-size:12px;display:flex;align-items:center;gap:12px}.breadcrumb strong{font-weight:600;color:#59516d}.top-actions{display:flex;align-items:center;gap:17px}.role-switch{display:flex;padding:4px;border:1px solid var(--line);border-radius:10px;background:white;gap:2px}.role-switch button{border:0;background:none;color:var(--muted);padding:5px 11px;border-radius:7px;font-size:11px;font-weight:650}.role-switch button.on{background:var(--lavender);color:var(--purple-dark)}.avatar{width:35px;height:35px;border-radius:50%;background:#f6e3d5;color:#ab7551;display:grid;place-items:center;font-weight:700}.preview-pill{color:var(--purple);font-size:10px;letter-spacing:.7px;background:var(--lavender);padding:5px 9px;border-radius:6px;white-space:nowrap}.content{max-width:1510px;margin:auto;padding:34px 39px 50px}.page-heading{display:flex;align-items:center;justify-content:space-between;margin-bottom:26px;gap:15px}.page-heading p{color:var(--muted);font-size:12px;margin-top:8px}.eyebrow{text-transform:uppercase;font-size:10px;letter-spacing:2px;font-weight:700;color:var(--purple);margin-bottom:10px}.btn{border:0;background:var(--purple);color:white;border-radius:10px;padding:11px 18px;display:inline-flex;gap:8px;align-items:center;justify-content:center;font-size:12px;font-weight:650;line-height:1.5;transition:transform .15s,background .15s}.btn:hover{background:#6545c2;transform:translateY(-1px)}.btn.secondary{background:white;border:1px solid var(--line);color:#625a78}.btn.secondary:hover{border-color:#c4b8e2;background:#faf8ff}.btn.ghost{background:transparent;color:var(--purple);padding:5px 0}.btn.orange{background:var(--orange);color:white}.btn.danger{background:#fff0f2;color:var(--red)}.btn.small{padding:7px 11px;font-size:11px}.btn .icon{width:16px;height:16px}.icon-btn{border:1px solid var(--line);border-radius:9px;background:white;width:35px;height:35px;display:inline-flex;align-items:center;justify-content:center;color:#9c95ae}.icon-btn.saved{color:var(--purple);background:var(--lavender);border-color:#d5c8f0}.dashboard-grid{display:grid;grid-template-columns:minmax(0,1fr) 300px;gap:25px}.hero{background:#eee9fa;border:1px solid #e5ddf4;min-height:210px;border-radius:var(--radius);padding:30px 32px;display:flex;position:relative;overflow:hidden}.hero .copy{max-width:62%;z-index:1}.hero h2{font-size:26px;line-height:1.3;letter-spacing:-.8px;margin:9px 0 12px}.hero p{font-size:12px;color:#8d80a7;max-width:340px;margin-bottom:21px}.hero .eyebrow{color:#9d8cb9;margin:0;font-size:9px}.hero-art{position:absolute;right:0;top:0;height:100%;width:40%;opacity:.95}.hero .btn{padding:9px 15px;font-size:11px}.stat-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:14px;margin:20px 0 28px}.stat{background:white;border:1px solid var(--line);border-radius:14px;padding:18px;display:flex;align-items:center;gap:13px}.stat-icon{width:41px;height:41px;display:grid;place-items:center;border-radius:13px;background:#f0eafa;color:var(--purple)}.stat:nth-child(2) .stat-icon{background:#fff0e4;color:#de9b66}.stat:nth-child(3) .stat-icon{background:#e9f4ee;color:#57a488}.stat strong{font-size:22px;line-height:1.3;display:block;letter-spacing:-.6px}.stat small{font-size:10px;color:var(--muted)}.section-head{display:flex;align-items:center;justify-content:space-between;margin:0 0 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.bottom{display:flex;justify-content:space-between;align-items:center;margin-top:17px}.chapter-icon{width:37px;height:37px;border-radius:11px;background:#f1eafb;color:var(--purple);display:grid;place-items:center;font-size:19px;font-family:Georgia,serif}.chapter-icon.peach{background:#fff0e5;color:#d6935e}.chapter-icon.blue{background:#e8f1fc;color:#6594ca}.chapter-icon.green{background:#e9f5ed;color:#68a081}.side-panel{background:white;border:1px solid var(--line);border-radius:16px;padding:23px;margin-bottom:19px}.side-panel h3{font-size:14px;margin-bottom:19px}.today-row{display:flex;gap:12px;padding:15px 0;border-top:1px solid #f3f0f6;align-items:center}.today-row .round{width:32px;height:32px;display:grid;place-items:center;background:#f4f0fc;color:var(--purple);border-radius:10px}.today-row strong{font-size:11px;display:block}.today-row p{font-size:10px;color:#a29bad}.today-row>a{margin-left:auto;color:var(--purple)}.day-strip{display:flex;justify-content:space-between;margin:20px 0 12px}.day{display:grid;place-items:center;gap:10px;font-size:10px;color:#b1aabd}.day b{display:grid;place-items:center;border-radius:50%;width:25px;height:25px;background:#f7f5fb;font-size:10px;font-weight:500}.day b.done{background:var(--purple);color:white}.small-muted{color:var(--muted);font-size:11px}.callout{background:#fff8ee;border:1px solid #f5e9d7;border-radius:15px;padding:20px}.callout h3{font-size:13px;color:#9d774b;margin:8px 0}.callout p{font-size:11px;color:#b69b79}.callout .icon{color:#d8ac73}.toolbar{display:flex;gap:10px;flex-wrap:wrap;margin-bottom:20px;align-items:center}.search{position:relative;flex:1;min-width:200px}.search .icon{position:absolute;left:13px;top:12px;width:17px;height:17px;color:#a69cb8}.input,select,textarea{border:1px solid var(--line);background:white;border-radius:9px;color:#625a77;padding:10px 12px;font-size:12px;max-width:100%}.search input{width:100%;padding-left:38px}.input::placeholder,textarea::placeholder{color:#b1a8bf}.chapter-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:18px}.chapter-card{background:white;border:1px solid var(--line);border-radius:17px;padding:24px;display:flex;flex-direction:column;transition:.2s}.chapter-card:hover{border-color:#cdbfeb;transform:translateY(-3px);box-shadow:0 10px 25px #4d367b08}.chapter-card h3{margin-top:18px;font-size:17px}.chapter-card p{font-size:11px;color:var(--muted);margin-top:8px;flex:1}.chapter-card .topics{margin:15px 0;min-height:45px}.badge{display:inline-block;background:#f5f2fa;color:#9b8dab;border-radius:5px;font-size:9px;padding:3px 7px;margin:2px 2px 2px 0;letter-spacing:.1px}.badge.purple{background:#eee7fb;color:var(--purple)}.badge.green{background:#e7f5ed;color:var(--green)}.badge.orange{background:#fff0df;color:#b88449}.badge.red{background:#fff0f2;color:var(--red)}.chapter-card 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p{font-size:12px;color:var(--muted);margin-bottom:18px}.workspace{display:grid;grid-template-columns:minmax(0,1fr) 245px;gap:22px}.question-card{background:white;border:1px solid var(--line);border-radius:18px;padding:28px}.question-top{display:flex;align-items:center;justify-content:space-between;margin-bottom:19px;gap:12px}.question-top .labels{display:flex;align-items:center;gap:6px;flex-wrap:wrap}.question-text{font-size:16px;line-height:2;white-space:pre-line;overflow-wrap:anywhere}.q-assets{display:flex;gap:10px;flex-wrap:wrap;margin:19px 0}.q-assets img{max-width:100%;max-height:410px;border:1px solid var(--line);border-radius:12px;background:white;object-fit:contain}.options{display:grid;gap:10px;margin-top:22px}.option{border:1px solid var(--line);background:#fff;border-radius:12px;padding:14px 17px;display:flex;gap:14px;align-items:center;text-align:left;width:100%;font-size:14px;min-height:52px}.option .letter{border:1px solid 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.step-number{min-width:23px;height:23px;border-radius:7px;background:#eee7fb;display:grid;place-items:center;font-size:10px;color:var(--purple)}.rubric{margin-top:18px}.rubric summary{font-size:12px;cursor:pointer;color:var(--purple)}table{width:100%;border-collapse:collapse;font-size:12px;margin:15px 0;overflow-wrap:anywhere}td,th{border:1px solid var(--line);padding:9px;text-align:left}th{background:#f5f2fb;font-weight:600}.mark{white-space:nowrap;color:var(--purple);font-weight:600}.working-area textarea{width:100%;min-height:150px;resize:vertical;margin-top:17px;background:#fcfbff;font-size:14px;line-height:1.8}.self-mark{display:flex;align-items:center;gap:10px;margin-top:15px;font-size:12px}.self-mark input{width:75px}.context-card{background:white;border:1px solid var(--line);border-radius:14px;padding:18px;margin-bottom:15px}.context-card h3{font-size:12px;margin-bottom:12px}.context-card p{font-size:11px;color:var(--muted);margin:7px 0}.context-card .btn{width:100%;margin-top:10px}.q-dots{display:flex;flex-wrap:wrap;gap:7px}.q-dot{width:33px;height:33px;border:1px solid var(--line);background:white;color:#aaa0b9;border-radius:8px;font-size:10px}.q-dot.current{background:var(--purple);color:white;border-color:var(--purple)}.q-dot.answered{background:#e9f5ef;border-color:#d2ecde;color:var(--green)}.case-banner{background:#eee8fb;border:1px solid #e0d6f4;padding:11px 16px;border-radius:10px;margin-bottom:19px;display:flex;gap:10px;align-items:center;color:var(--purple-dark);font-size:11px}.case-passage{background:#fbfaff;border:1px solid #eee7f7;padding:22px;border-radius:12px;margin-bottom:22px}.case-passage .question-text{font-size:14px}.case-part{padding:23px 0;border-top:1px solid var(--line)}.case-part .part-title{font-size:10px;letter-spacing:1px;color:#9985b9;margin-bottom:10px;font-weight:700}.case-part .question-text{font-size:14px}.choice-select{display:flex;align-items:center;gap:9px;background:#faf8fe;padding:10px 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23px;display:grid;grid-template-columns:1.3fr 1fr 100px;gap:25px;align-items:center}.progress-row h3{font-size:13px}.progress-row p{font-size:10px;color:var(--muted)}.progress-row .rate{text-align:right;font-size:12px}.progress-row .rate b{font-size:18px;display:block;color:var(--purple)}.paper-layout{display:grid;grid-template-columns:minmax(0,1fr) 290px;gap:22px}.paper-check{accent-color:var(--purple);width:18px;height:18px;cursor:pointer;margin-top:7px}.paper-panel{position:sticky;top:20px;align-self:start;background:white;border:1px solid var(--line);border-radius:17px;padding:23px}.paper-panel h2{font-size:17px;margin-bottom:6px}.paper-list{margin:20px 0;max-height:420px;overflow:auto}.paper-item{display:flex;align-items:center;gap:9px;padding:12px 0;border-bottom:1px solid var(--line);font-size:11px}.paper-item span{flex:1}.paper-total{display:flex;justify-content:space-between;font-size:12px;margin:15px 0}.paper-total strong{color:var(--purple);font-size:20px}.paper-actions{display:grid;gap:9px}.modal-backdrop{position:fixed;inset:0;background:#21153570;z-index:80;display:flex;align-items:center;justify-content:center;padding:25px;backdrop-filter:blur(3px)}.modal{background:white;border-radius:20px;max-width:650px;width:100%;max-height:90vh;overflow:auto;box-shadow:0 20px 90px #29184025;padding:28px}.modal.wide{max-width:1000px}.modal-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:21px}.modal-head h2{font-size:21px}.modal p{font-size:12px;color:var(--muted);margin-bottom:15px}.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:16px}.field{display:flex;flex-direction:column;gap:7px;font-size:11px;color:#8c809e}.field input,.field select{width:100%}.field.full{grid-column:1/-1}.modal .footer-actions{display:flex;justify-content:flex-end;gap:10px;margin-top:25px}.modal textarea{width:100%;min-height:115px;resize:vertical}.feedback-button{position:fixed;bottom:23px;right:25px;z-index:40;box-shadow:0 5px 25px #6546a830;background:var(--ink);font-size:11px;padding:10px 15px}.feedback-button:hover{background:var(--purple-dark)}#toast{position:fixed;bottom:30px;left:50%;transform:translate(-50%,20px);background:#2e2543;color:white;border-radius:11px;padding:12px 22px;font-size:12px;z-index:100;opacity:0;pointer-events:none;transition:.2s;max-width:90vw}#toast.visible{opacity:1;transform:translate(-50%,0)}.loading{display:grid;place-content:center;justify-items:center;min-height:90vh;gap:20px}.loading p{color:var(--muted)}.lesson-formula{font-size:19px;padding:18px;background:#f7f3ff;border-radius:10px;margin:15px 0;color:var(--purple-dark);text-align:center}.lesson-block{padding:19px 0;border-bottom:1px solid var(--line)}.lesson-block h3{margin-bottom:9px}.lesson-block p{line-height:1.9;margin:0}.notice{background:#f3effb;border:1px solid #e7dff3;border-radius:11px;padding:12px 16px;color:#9685ae;font-size:11px;margin-bottom:20px}.review-table{display:flex;flex-direction:column;gap:12px}.review-entry{background:white;border:1px solid var(--line);border-radius:13px;padding:19px}.review-entry p{font-size:12px;margin:10px 0}.notes-list .note{padding:17px 0;border-bottom:1px solid var(--line)}.note small{display:block;color:var(--muted);font-size:10px;margin-bottom:6px}.note p{color:var(--ink);white-space:pre-wrap}.note button{float:right}.paper-sheet{background:white;padding:25px;color:#171321}.paper-sheet h1{text-align:center;font-size:23px}.paper-sheet .paper-description{text-align:center;color:#555;font-size:12px;margin:8px 0 20px}.paper-sheet .paper-question{padding:20px 0;border-top:1px solid #ddd;break-inside:avoid}.paper-sheet .question-text{font-size:13px}.paper-sheet .options{margin-top:10px;display:grid;grid-template-columns:1fr 1fr;gap:8px;font-size:12px}.paper-sheet .solution{font-size:12px}.paper-sheet img{max-height:280px}.paper-choice{border-left:2px solid #ccc;margin-top:15px;padding-left:15px}.mobile-menu{display:none}.result-summary{display:grid;grid-template-columns:repeat(3,1fr);gap:12px;margin:20px 0}.result-summary div{text-align:center;padding:18px;background:#f6f2fd;border-radius:12px}.result-summary strong{display:block;font-size:22px;color:var(--purple)}.result-summary small{font-size:10px;color:var(--muted)}.kbd{font-size:10px;border:1px solid var(--line);border-radius:5px;padding:1px 5px;color:#a69bb6}.footer-note{font-size:10px;color:#b1a8c0;margin-top:25px}.katex{font-size:1.12em}.katex-display{overflow:auto;padding:3px 0}.pagination{display:flex;justify-content:center;gap:9px;margin:23px 0}.detail-hero{display:flex;gap:20px;align-items:center;margin-bottom:25px}.detail-hero .chapter-icon{width:55px;height:55px;font-size:28px}.learn-grid{display:grid;grid-template-columns:1.2fr 1fr;gap:23px}.no-data{font-size:11px;color:#b1a5c0;padding:15px 0}.check-line{display:flex;gap:9px;align-items:center;margin:10px 0;font-size:12px}.check-line input{accent-color:var(--purple)}.print-area{display:none}
@media(min-width:1500px){.dashboard-grid{grid-template-columns:minmax(0,1fr) 330px}.hero{min-height:240px}.hero .copy{max-width:60%}}
@media(max-width:1150px){.sidebar{width:205px;padding:25px 15px}.main{margin-left:205px;width:calc(100% - 205px)}.content{padding:28px}.topbar{padding:0 28px}.dashboard-grid{grid-template-columns:minmax(0,1fr) 255px;gap:18px}.hero{padding:25px}.hero h2{font-size:23px}.stat{padding:13px;gap:8px}.stat-icon{width:32px;height:32px}.stat strong{font-size:20px}.chapter-grid{grid-template-columns:repeat(2,1fr)}.paper-layout{grid-template-columns:minmax(0,1fr) 250px}.workspace{grid-template-columns:minmax(0,1fr) 210px}.preview-pill{display:none}.hero-art{width:38%}}
@media(max-width:920px){.dashboard-grid{grid-template-columns:1fr}.dashboard-aside{display:grid;grid-template-columns:1fr 1fr;gap:16px}.dashboard-aside .callout{grid-column:1/-1}.dashboard-aside .side-panel{margin:0}.workspace{grid-template-columns:1fr}.workspace-aside{display:flex;gap:15px;flex-wrap:wrap}.workspace-aside .context-card{flex:1;min-width:180px}.test-grid{grid-template-columns:1fr}.paper-layout{grid-template-columns:1fr}.paper-panel{position:relative;order:-1}.paper-list{max-height:150px}.learn-grid{grid-template-columns:1fr}.question-preview .preview-actions{flex-direction:column}}
@media(max-width:680px){.sidebar{transform:translateX(-100%);transition:.2s;width:230px;box-shadow:10px 0 40px #21153530}.sidebar.open{transform:translateX(0)}.main{margin:0;width:100%}.mobile-menu{display:flex;border:0;background:none;color:var(--purple);padding:5px}.topbar{height:70px;padding:0 18px;gap:9px}.breadcrumb{font-size:10px;gap:6px;flex:1}.top-actions{gap:8px}.avatar{display:none}.role-switch button{padding:4px 7px;font-size:10px}.content{padding:23px 18px 80px}.page-heading{align-items:flex-start}h1{font-size:26px}.page-heading .btn{padding:9px 11px;font-size:10px}.page-heading p{font-size:11px}.hero{padding:23px;min-height:220px}.hero .copy{max-width:75%}.hero-art{right:-25px;opacity:.45}.stat-grid{gap:8px}.stat{display:block;padding:12px}.stat-icon{display:none}.stat strong{font-size:20px}.stat small{font-size:9px}.cards-2,.chapter-grid,.dashboard-aside{grid-template-columns:1fr}.chapter-mini{padding:20px}.chapter-card{padding:21px}.dashboard-aside .callout{grid-column:auto}.question-card{padding:20px}.question-text{font-size:14px}.question-preview{padding:17px;gap:9px}.question-preview p{font-size:12px}.q-index{display:none}.preview-actions .btn{padding:6px 8px;font-size:10px}.question-preview .preview-actions{flex-direction:column}.form-grid{grid-template-columns:1fr}.field.full{grid-column:auto}.modal-backdrop{padding:12px}.modal{padding:23px;max-height:94vh}.progress-row{grid-template-columns:1fr 70px;gap:10px}.progress-row .progress-track{grid-column:1/-1;grid-row:2}.result-summary{gap:7px}.result-summary div{padding:13px 5px}.feedback-button{bottom:14px;right:14px}.choice-select{display:block}.choice-select select{margin:5px 0}.question-top{align-items:flex-start}.notice{font-size:10px}.tabs{gap:13px}.tabs button{font-size:11px}}
@media print{body{background:white}.shell,.feedback-button,#toast,#modal-root{display:none!important}.print-area{display:block!important}.paper-sheet{padding:0}.paper-sheet .paper-question{page-break-inside:avoid}.paper-sheet .question-text{font-size:12px}.paper-sheet .q-assets img{max-width:450px}a{color:black}}
@media(prefers-reduced-motion:reduce){*{transition:none!important;scroll-behavior:auto!important}}
.question-preview .q-main>p{display:-webkit-box;-webkit-box-orient:vertical;-webkit-line-clamp:3;overflow:hidden}.case-passage table th,.case-passage table td{text-align:center;min-width:45px}.question-text{overflow-x:auto}.sidebar{overflow-y:auto;scrollbar-width:thin}@media(max-width:680px){.sidebar{visibility:hidden}.sidebar.open{visibility:visible}}
.chapter-picker{border:1px solid var(--border,#ddd);border-radius:12px;padding:15px}.chapter-options{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:10px;margin-top:14px}.chapter-options label{display:flex;align-items:start;gap:8px;font-size:13px;line-height:1.5}.chapter-options input{margin-top:3px;accent-color:#6554a4}.answer-evidence{margin-top:20px}.answer-evidence h4{margin-bottom:8px}.answer-tools{display:flex;flex-wrap:wrap;align-items:center;gap:10px;margin:12px 0}.answer-tools label{font-size:13px}.answer-pad{display:block;width:100%;height:auto;aspect-ratio:1;background:repeating-linear-gradient(white 0,white 29px,#e6edf2 30px);border:1px solid #ccd7df;border-radius:10px;touch-action:none;cursor:crosshair}.answer-pad[data-locked]{touch-action:auto;cursor:default}.answer-file{display:block;max-width:220px;font-size:12px;margin-top:7px}.answer-photos{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px;margin-top:15px}.answer-photos figure{margin:0;min-width:0}.answer-photos img{display:block;max-height:360px;width:100%;object-fit:contain;background:#f1f4f7;border-radius:8px}.answer-photos figcaption{font-size:12px;overflow-wrap:anywhere;margin:7px 0}.evidence-status{font-size:12px;color:#326e53;margin-top:10px}@media(max-width:600px){.chapter-options{grid-template-columns:1fr}.answer-photos{grid-template-columns:1fr}}
.ncert-tabs{display:flex;flex-wrap:wrap;gap:10px;margin:20px 0}.ncert-solution{margin-top:22px;border:1px solid #dad4ec;border-radius:12px;overflow:hidden}.ncert-solution>summary{cursor:pointer;padding:18px;font-weight:600;background:#f4f0fc}.ncert-solution .solution{margin-top:0}.ncert-chapter-status>div{padding:12px 0;border-bottom:1px solid #eee}.ncert-chapter-status strong,.ncert-chapter-status span{display:block;font-size:12px;line-height:1.6}.ncert-examples{display:flex;flex-wrap:wrap;gap:10px;margin:22px 0}.ncert-hint{margin-top:12px}.ncert-options .option{margin-top:10px}.ncert-solution p{margin-top:8px}
.ncert-chapter-picker{margin-top:20px;max-width:560px}.ncert-chapter-status .btn{margin-top:6px}.ncert-solution .q-assets img{width:100%;height:auto;max-width:900px}
/* NCERT recall studio */
.learning-intro{display:flex;justify-content:space-between;gap:24px;padding:30px;border-radius:22px;background:#eee9fc;margin:24px 0}.learning-intro h2{margin:12px 0;font-size:30px}.learning-intro p{line-height:1.7}.learning-count{display:flex;flex-direction:column;justify-content:center;gap:8px;max-width:230px}.learning-count strong{font-size:30px}.learning-count small{line-height:1.5;color:#526070}.learning-notes{display:grid;gap:18px;max-width:1000px}.learning-note p{margin:18px 0;line-height:1.85;font-size:17px}.learning-links{display:flex;flex-wrap:wrap;gap:10px;margin:18px 0}.learning-toolbar{display:flex;justify-content:space-between;gap:20px;margin:24px 0}.recall-card{max-width:920px;background:#fff;border:1px solid #ded9ed;border-radius:24px;padding:32px;box-shadow:0 12px 40px #35275208}.recall-card h2{font-size:29px;margin:22px 0 14px}.recall-prompt{font-size:21px;line-height:1.6;margin-bottom:24px}.recall-answer{border-top:1px solid #e7e1f0;margin-top:24px;padding-top:24px}.recall-answer p,.recall-answer li{line-height:1.8}.recall-formula{font-size:23px;background:#f6f4fc;border-radius:15px;padding:24px;margin:15px 0;overflow-x:auto}.recall-answer h4{margin:20px 0 8px}.recall-rating{border:0;border-top:1px solid #e7e1f0;padding:20px 0 0;margin:24px 0;display:flex;flex-wrap:wrap;gap:10px}.recall-rating legend{font-weight:600;padding:10px 0}.recall-navigation{justify-content:space-between}.learning-diagram{margin:24px 0}.learning-diagram img{width:100%;height:auto}.learning-diagram figcaption{font-size:13px;color:#566478;line-height:1.6;margin-top:8px}.learning-attribution{max-width:920px;margin-top:25px;line-height:1.7}.derivation-steps{margin:24px 0}.derivation-steps .step{padding:15px 0}.recall-card textarea{min-height:90px}
@media(max-width:650px){.learning-intro{flex-direction:column;padding:22px}.recall-card{padding:20px}.recall-card h2{font-size:24px}.recall-prompt{font-size:19px}.recall-formula{font-size:19px;padding:16px}.learning-toolbar{font-size:14px}.recall-navigation .btn{flex:1}.learning-count{max-width:none}.learning-note p{font-size:16px}}
.journey-tabs{display:flex;flex-wrap:wrap;gap:8px;margin:22px 0}.journey-hero{padding:36px;border-radius:22px;background:#eee8fa;margin:24px 0}.journey-hero h2{font-size:34px;margin:14px 0}.journey-hero p{margin-bottom:24px;line-height:1.7}.journey-hero .small-muted{display:block;margin-top:14px}.journey-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:18px;margin:24px 0}.journey-grid h2{margin:14px 0}.journey-grid p{margin:12px 0;line-height:1.6}#journey-paper{max-width:100%}@media(max-width:600px){.journey-hero{padding:24px}.journey-hero h2{font-size:27px}.journey-tabs .btn{font-size:12px;padding:10px}.journey-grid{grid-template-columns:1fr}}
/* Semantic learning palette: labels preserve meaning without colour. */
.learning-note{border-top:4px solid #3573a5;background:#f7fbff}.concept-label{color:#235981;background:#e4effb}.section-label{display:inline-block;font-size:11px;font-weight:700;letter-spacing:.1em;padding:5px 8px;border-radius:6px;margin-bottom:10px}.learning-note h2{font-size:21px}.formula-card{border-top:5px solid #8061bb}.reasoning-card{border-top:5px solid #287b73}.reasoning-card .step-number{background:#e1f3ee;color:#155e56}.reasoning-card .recall-formula{background:#e8f5ef;color:#164b43}.formula-card .recall-formula{background:#eee8fa;color:#33204e}.conditions-panel{background:#fff3d8;border-left:4px solid #ae760a;padding:4px 20px 15px;border-radius:8px;color:#59400b;margin:18px 0}.conditions-panel h4{color:#59400b}.conditions-panel ul{padding-left:22px}.topic-videos{display:grid;grid-template-columns:repeat(auto-fit,minmax(210px,1fr));gap:16px;margin:22px 0}.topic-video{max-width:480px;border:1px solid #ddd9e7;background:#fff;border-radius:12px;overflow:hidden;padding:12px;display:flex;flex-direction:column;gap:9px}.topic-video strong{font-size:14px;line-height:1.5}.topic-video small{font-size:12px;color:#536073}.video-preview{display:block;position:relative;border:0;border-radius:8px;overflow:hidden;background:#eee8fa;color:#302247;cursor:pointer;text-align:left;padding:0;min-height:44px}.video-preview img{width:100%;aspect-ratio:16/9;object-fit:cover;display:block}.video-preview span{display:block;padding:10px;font-weight:600}.topic-video video,.topic-video iframe{width:100%;aspect-ratio:16/9;border:0;border-radius:8px}.chapter-video{border:1px solid #cddcd7;border-left:4px solid #287b73;padding:16px;border-radius:12px;margin:20px 0;background:#f5faf7}.chapter-video summary{cursor:pointer;font-weight:600}.chapter-video .topic-video{margin-top:16px}@media print{.topic-videos,.chapter-video{display:none}}

/* Checkbox controls must not inherit the full-width text-field rule. */
.chapter-picker{min-width:0;color:var(--ink);padding:16px}
.chapter-picker legend{font-size:13px;font-weight:650;color:var(--ink);padding:0 6px}
.chapter-picker .chapter-options{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:8px;margin-top:8px}
.chapter-picker .chapter-options label{display:flex;align-items:flex-start;justify-content:flex-start;gap:10px;text-align:left;min-width:0;margin:0;padding:11px 12px;border:1px solid var(--line);border-radius:9px;font-size:13px;line-height:1.5;color:var(--ink);cursor:pointer;background:#fff}
.chapter-picker .chapter-options label:has(input:checked){background:#f3effc;border-color:#b8a6e4}
.chapter-picker .chapter-options input[type=checkbox]{flex:0 0 18px;width:18px;height:18px;max-width:18px;margin:1px 0 0;padding:0;accent-color:var(--purple)}
.chapter-picker .chapter-options label span{flex:1;min-width:0;overflow-wrap:anywhere}
@media(max-width:600px){.chapter-picker .chapter-options{grid-template-columns:1fr}.chapter-picker{padding:12px}.chapter-picker .chapter-options label{min-height:44px}}
.map-unit-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:20px;margin:25px 0}.map-unit h2{margin:16px 0}.map-chapter{display:flex;justify-content:space-between;align-items:center;gap:16px;width:100%;text-align:left;padding:16px 0;border:0;border-bottom:1px solid var(--line);background:transparent;line-height:1.5}.map-chapter span{flex:1}.map-chapter strong{color:#5a3f97;text-align:right}.map-chapter small{display:block;font-weight:400;font-size:10px;max-width:100px}.unit-mark-bar{height:5px;background:#eee9f5;border-radius:5px}.unit-mark-bar span{display:block;height:100%;background:#287b73}.map-toolbar{display:flex;align-items:center;flex-wrap:wrap;gap:16px;margin:22px 0}.map-root{background:#eee8fa;border-radius:18px;padding:25px;margin:20px 0;border-bottom:4px solid #8061bb}.map-root h2{font-size:27px;margin:10px 0}.map-root p{margin-top:15px;font-size:12px}.map-workspace{display:grid;grid-template-columns:minmax(0,1.2fr) minmax(0,1fr);gap:22px;margin-top:25px;align-items:start}.mind-tree{border-left:3px solid #bca9df;padding-left:20px;display:grid;gap:20px}.map-branch{position:relative}.map-branch:before{content:'';position:absolute;left:-20px;top:25px;width:20px;border-top:2px solid #bca9df}.map-node{display:flex;flex-direction:column;gap:5px;text-align:left;border:1px solid #d5cbea;border-radius:12px;padding:14px 17px;background:#fff;width:100%;line-height:1.5;color:#292338}.map-node small{color:#665287;font-size:11px}.map-node.selected{background:#eee8fa;border:2px solid #8061bb}.map-children{border-left:2px solid #b5d9d3;padding-left:16px;margin:12px 0 0 16px;display:grid;gap:8px}.map-children .map-node{background:#f2faf7;border-color:#b5d9d3}.map-children .map-node.selected{border:2px solid #287b73}.map-detail{position:sticky;top:15px}.map-detail h2{margin-bottom:16px}.map-detail h3{margin:25px 0 12px}.map-detail p{margin:12px 0;line-height:1.6}.map-detail details{margin:15px 0}.map-detail summary{cursor:pointer;font-weight:600}.map-question-links{display:flex;gap:7px;flex-wrap:wrap;margin:12px 0}.map-detail .small-muted{font-size:12px}@media(max-width:760px){.map-workspace{grid-template-columns:1fr}.map-detail{position:static}.mind-tree{max-height:420px;overflow:auto;padding-right:5px}.map-unit-grid{grid-template-columns:1fr}.map-root h2{font-size:23px}}
/* Student-facing first visit: calm, editorial, with a real mathematical interaction. */
.student-landing{--landing-ink:#29243b;background:#fcfbf7;color:var(--landing-ink);min-height:100vh}.landing-header{max-width:1280px;padding:28px 48px;margin:auto;display:flex;align-items:center;gap:28px;border-bottom:1px solid #e9e5df}.landing-brand{display:inline-flex;align-items:center;gap:9px;font-size:28px;font-weight:800;letter-spacing:-1.4px}.brand-dot{color:#7657d6}.landing-class{font-size:10px;letter-spacing:1.4px;color:#716b7c}.landing-header nav{margin-left:auto;display:flex;gap:25px;align-items:center;font-size:13px;font-weight:600}.student-landing main{max-width:1280px;margin:auto}.landing-hero{display:grid;grid-template-columns:1.1fr 1fr;gap:70px;padding:85px 48px 75px;align-items:center}.landing-eyebrow{font-size:10px;letter-spacing:1.7px;font-weight:700;color:#6e657b;display:block}.landing-eyebrow>span{display:inline-block;width:7px;height:7px;background:#388b76;border-radius:50%;margin-right:8px}.landing-hero h1{font-size:clamp(42px,4.5vw,65px);font-weight:700;line-height:1.12;letter-spacing:-2.8px;margin:23px 0}.landing-hero h1 em{font-family:Georgia,serif;font-weight:400;color:#7251b5;letter-spacing:-2px}.landing-lead{max-width:450px;font-size:17px;line-height:1.8;color:#686171}.landing-primary{display:flex;gap:23px;align-items:center;flex-wrap:wrap;margin:28px 0 14px}.landing-primary .btn{padding:14px 22px;font-size:14px;border-radius:9px;gap:30px}.landing-text-link{border:0;background:none;font-size:13px;font-weight:650;color:#5c438b;cursor:pointer;padding:0;text-align:left}.landing-subtle{font-size:11px;color:#837b8a}.landing-source-strip{margin-top:35px;display:flex;gap:18px;flex-wrap:wrap;font-size:10px;color:#716a7b}.landing-source-strip span:before{content:'✓';color:#287b65;margin-right:6px}.landing-demo{background:white;border:1px solid #e0d7ed;border-radius:22px;box-shadow:12px 18px 0 #eee8f4;overflow:hidden;scroll-margin-top:25px}.landing-demo-top{display:flex;justify-content:space-between;padding:20px 25px;background:#f5f1fb;color:#79658f;font-size:9px;letter-spacing:.8px;gap:12px}.landing-demo h2{font-size:30px;line-height:1.2;letter-spacing:-1px;padding:24px 28px 12px}.landing-demo>p{font-size:13px;padding:0 28px;color:#766d80;line-height:1.7}.landing-relation{width:100%;height:auto;max-height:210px;margin:5px 0}.landing-demo-choice{border:0;padding:0 28px;margin:0}.landing-demo-choice legend{font-size:14px;font-weight:650;padding:0;margin:0 0 13px}.landing-demo-choice button{border:1px solid #ddd4eb;padding:11px 20px;background:white;border-radius:9px;margin-right:8px;font-size:13px}.landing-demo-choice button.picked{background:#eee8fa;border-color:#8061bb}.landing-demo-feedback{margin:18px 28px;background:#edf7f1;padding:17px;border-left:3px solid #35866a;border-radius:8px;font-size:12px;line-height:1.7}.landing-demo-feedback p{margin:9px 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.student-landing .first-study{max-width:680px;padding:35px 22px 60px}
.first-study>.landing-eyebrow{margin:28px 0 10px}
.first-study>p{margin:12px 0 24px}
.first-study-actions{padding:16px 28px;display:flex;flex-wrap:wrap;gap:10px}
.first-study .landing-demo{padding-bottom:20px}
.first-study .landing-demo-choice button.picked,.first-study [aria-pressed=true]{background:#eee8fa;border-color:#8061bb}
.first-study-recap{margin-top:35px;padding:22px;background:#edf7f1;border-radius:12px}
.first-study-recap p{margin:10px 0}
.first-account-controls{border:0;margin:0;padding:0;min-width:0;display:flex;flex-wrap:wrap;gap:10px}
.first-account-controls form{width:100%;display:grid;gap:8px;max-width:390px}
.first-account-controls p{flex-basis:100%}
@media(max-width:600px){.landing-header nav a[data-nav="first-study"]{display:inline;font-size:11px}}
/* Student landing refresh: retain the complete chapter journey, local review only. */
.mathbee-logo{width:52px;height:52px;object-fit:contain;border-radius:12px;flex-shrink:0}.landing-brand{gap:10px}.brand .mathbee-logo{width:40px;height:40px}.student-landing{background:#faf9f6}.landing-header{border-bottom:1px solid #e5e2dc}.landing-hero{background:radial-gradient(ellipse at 4% 10%,#fff0cd80,transparent 60%);padding-top:65px;padding-bottom:65px}.landing-hero h1{font-size:clamp(42px,5.4vw,72px);letter-spacing:-3px}.landing-hero h1 em{color:#7252ad}.landing-hero .landing-demo{transform:rotate(1deg);box-shadow:12px 14px 0 #eee8f3}.landing-toolkit{padding:52px 48px 60px;background:#fff;border-block:1px solid #ece8e1}.landing-toolkit .landing-section-heading>p{max-width:230px;color:#746c79}.landing-tools{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px}.landing-tools>a{display:flex;flex-direction:column;padding:26px;background:#f0ebf8;border:1px solid #e4dbef;border-radius:20px;transition:transform .18s}.landing-tools>a:hover{transform:translateY(-4px)}.landing-tools>a:nth-child(2){background:#edf5f0;border-color:#d7e7dc}.landing-tools>a:nth-child(3){background:#fff3df;border-color:#efdfc3}.tool-symbol{font-size:28px;line-height:1;margin-bottom:20px}.landing-tools small{font-size:10px;letter-spacing:1.3px}.landing-tools h3{font-size:23px;line-height:1.25;margin:12px 0}.landing-tools p{color:#625d6b;line-height:1.8;font-size:13px}.landing-tools strong{font-size:12px;margin:22px 0}.mini-map,.mini-formula,.mini-sources{margin-top:auto;min-height:90px;border-radius:12px;background:#ffffff99;padding:18px;display:flex;gap:8px;align-items:center;justify-content:center}.mini-map{flex-wrap:wrap}.mini-map span,.mini-sources span{border:1px solid #ded6e5;border-radius:8px;padding:5px 9px;font-size:11px;background:#fff}.mini-map i{width:15px;height:1px;background:#8c74ae}.mini-formula{font-family:Georgia,serif;font-size:23px;flex-direction:column}.mini-formula small{font:8px sans-serif;letter-spacing:1px}.mini-sources{flex-wrap:wrap}.landing-resource-line{display:flex;justify-content:space-between;gap:20px;flex-wrap:wrap;margin-top:30px;font-size:12px;color:#6a6372}.landing-resource-line span:before{content:'✓';margin-right:8px;color:#387963}.landing-welcome{margin:25px 48px 0;padding:24px 30px;border-radius:16px;background:#ebe6f5;display:flex;align-items:center;justify-content:space-between;gap:20px}.landing-welcome h2{margin:7px 0}.landing-welcome p{color:#70677b}.landing-account-panel{margin:25px 48px;padding:25px;background:#fff;border:1px solid #ded6e5;border-radius:16px}.landing-account-panel>button{float:right}.landing-account-panel .first-study-recap{margin:0;background:transparent}.landing-chapter-grid button:hover{background:#f0ebf6}.landing-chapter-grid button{padding-inline:12px;border-radius:10px}.landing-intentions{background:#f6f4ef}.landing-footer .mathbee-logo{width:44px;height:44px}
@media(max-width:850px){.landing-toolkit{padding:40px 28px}.landing-tools{gap:12px}.landing-tools>a{padding:20px}.landing-tools h3{font-size:20px}.landing-header{flex-wrap:wrap}.landing-header nav{margin-left:auto}.landing-hero h1{letter-spacing:-2px}}
@media(max-width:600px){.landing-toolkit{padding:36px 22px}.landing-tools{grid-template-columns:1fr;gap:16px}.landing-toolkit .landing-section-heading>p{max-width:none;margin-top:15px}.landing-resource-line{display:grid;grid-template-columns:1fr 1fr;font-size:11px;gap:14px}.landing-hero .landing-demo{transform:none;min-width:0}.landing-header .mathbee-logo{width:44px;height:44px}.landing-header nav{gap:7px}.landing-welcome{margin:20px 22px 0;align-items:start;flex-direction:column;padding:22px}.landing-account-panel{margin:20px 22px;padding:20px}.landing-hero h1{font-size:48px}.landing-primary{flex-wrap:wrap}.landing-tools>a{padding:25px}}
@media(prefers-reduced-motion:reduce){.landing-tools>a{transition:none}.landing-tools>a:hover{transform:none}}
/* Keep the workspace navigation small; reveal practice sources within Practise. */
.journey-tabs{display:flex;gap:6px;padding:6px;background:#eeeaf4;border-radius:14px;width:fit-content;max-width:100%;margin:20px 0;flex-wrap:wrap}.journey-tabs .btn{box-shadow:none}.journey-practice-options{display:flex;gap:8px;flex-wrap:wrap;margin:0 0 22px}.journey-practice-options [aria-pressed=true]{background:#eee8fa;border-color:#8061bb}.learning-source{font-size:11px;color:#776e84;margin-top:18px}.learning-source summary{cursor:pointer}.map-view-controls{display:flex;align-items:center;gap:8px;flex-wrap:wrap;margin:20px 0}.map-view-controls>span{margin-right:auto;color:#70677b}.map-flow-scroll{overflow:auto;padding:24px;border:1px solid #e5dfee;border-radius:18px;background:radial-gradient(#dfd9e9 1px,transparent 1px) 0 0/18px 18px;max-height:75vh}.map-flow-title{background:#7050ab;color:white;padding:18px;border-radius:14px;width:250px;text-align:center;font-weight:700;margin:0 0 30px;position:relative}.map-flow-title:after{content:'';position:absolute;top:100%;left:35px;height:30px;border-left:3px solid #bca9df}.mind-tree{margin-left:35px;min-width:520px;max-height:none;overflow:visible}.map-branch{display:grid;grid-template-columns:210px 250px;gap:32px;align-items:start}.map-children{margin:0;padding:0 0 0 20px;position:relative}.map-children:empty{border:0}.map-children:not(:empty):before{content:'';position:absolute;left:-32px;top:25px;width:32px;border-top:2px solid #b5d9d3}.map-children .map-node{position:relative}.map-children .map-node:before{content:'';position:absolute;left:-21px;top:25px;width:20px;border-top:2px solid #b5d9d3}.map-workspace{grid-template-columns:minmax(0,1.5fr) minmax(260px,1fr)}
@media(max-width:1050px){.map-workspace{grid-template-columns:1fr}.map-detail{position:static}}@media(max-width:600px){.journey-tabs{width:100%;display:grid;grid-template-columns:repeat(4,1fr)}.journey-tabs .btn{padding:10px 5px;font-size:11px}.map-flow-scroll{padding:16px}.mind-tree{max-height:none}}