:root{
  --bg:#f5f8fc;--surface:#fff;--surface-2:#eef4fb;--text:#172033;--muted:#667085;
  --line:#dce5ef;--brand:#275fcf;--brand-2:#153f9b;--accent:#8b5cf6;--ok:#147d64;--warn:#a96708;--danger:#b42318;
  --shadow:0 16px 42px rgba(27,45,73,.08);--radius:22px;--radius-sm:14px;--max:1180px;
}
:root[data-theme="dark"]{
  --bg:#0e1420;--surface:#151e2d;--surface-2:#1b2738;--text:#edf4ff;--muted:#aab8ca;--line:#2d3b4e;
  --brand:#78a4ff;--brand-2:#a9c4ff;--accent:#b496ff;--ok:#6ed3b7;--warn:#ffc86d;--danger:#ff948b;
  --shadow:0 18px 45px rgba(0,0,0,.25)
}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--bg);color:var(--text);font-family:Inter,ui-sans-serif,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;line-height:1.58}button,input,select,textarea{font:inherit}button{cursor:pointer}a{color:var(--brand)}
.topbar{position:sticky;top:0;z-index:20;background:color-mix(in srgb,var(--surface) 94%,transparent);backdrop-filter:blur(16px);border-bottom:1px solid var(--line);display:flex;justify-content:space-between;align-items:center;padding:12px max(18px,calc((100vw - var(--max))/2));gap:18px}.brand{border:0;background:none;color:var(--text);display:flex;align-items:center;gap:12px;text-align:left}.brand-mark{width:42px;height:42px;border-radius:13px;display:grid;place-items:center;background:linear-gradient(135deg,var(--brand),var(--accent));color:white;font-weight:900}.brand strong{display:block}.brand small{display:block;color:var(--muted);font-size:.77rem}.top-actions{display:flex;gap:7px;flex-wrap:wrap;justify-content:flex-end}.ghost,.btn{border:1px solid var(--line);border-radius:12px;padding:9px 13px;background:var(--surface);color:var(--text);font-weight:700}.ghost:hover,.btn.secondary:hover{border-color:var(--brand);color:var(--brand)}.ghost.square{width:42px;padding:9px}.btn{background:var(--brand);color:white;border-color:var(--brand)}.btn:hover{filter:brightness(.96)}.btn.secondary{background:var(--surface);color:var(--text);border-color:var(--line)}.btn.danger{background:var(--danger);border-color:var(--danger)}.btn:disabled,.ghost:disabled{opacity:.48;cursor:not-allowed}
main{width:min(var(--max),calc(100% - 32px));margin:34px auto 70px}.hero{display:grid;grid-template-columns:1.45fr .75fr;gap:22px;align-items:stretch}.panel,.card{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow)}.panel{padding:28px}.hero-copy{padding:38px}.eyebrow{text-transform:uppercase;letter-spacing:.12em;color:var(--brand);font-size:.73rem;font-weight:900}.hero h1,.panel h1{font-size:clamp(2rem,4vw,3.5rem);line-height:1.06;margin:.35rem 0 1rem;letter-spacing:-.04em}.hero p.lead{font-size:1.09rem;color:var(--muted);max-width:72ch}.hero-side{padding:24px;display:flex;flex-direction:column;gap:14px}.stat{background:var(--surface-2);border-radius:16px;padding:16px}.stat strong{font-size:1.6rem;display:block}.stat span{color:var(--muted)}
.section-head{display:flex;justify-content:space-between;align-items:end;gap:20px;margin:42px 0 16px}.section-head h2{margin:.25rem 0 0;font-size:1.8rem}.section-head p{color:var(--muted);max-width:62ch}.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}.year-card{padding:24px;position:relative;overflow:hidden}.year-card:before{content:"";position:absolute;right:-40px;top:-50px;width:150px;height:150px;border-radius:50%;background:color-mix(in srgb,var(--brand) 13%,transparent)}.year-card h3{font-size:1.55rem;margin:.35rem 0 .45rem}.year-card p{color:var(--muted)}.chip-row,.btn-row{display:flex;gap:9px;flex-wrap:wrap;align-items:center}.chip,.pill{display:inline-flex;align-items:center;gap:6px;border-radius:999px;padding:5px 10px;background:var(--surface-2);border:1px solid var(--line);font-size:.78rem;font-weight:750}.chip.ok{color:var(--ok)}.chip.warn{color:var(--warn)}.chip.lock{color:var(--muted)}
.breadcrumb{display:flex;gap:8px;align-items:center;color:var(--muted);font-size:.9rem;margin-bottom:16px}.breadcrumb button{border:0;background:none;color:var(--brand);padding:0}.lesson-list{display:grid;gap:13px}.lesson-row{display:grid;grid-template-columns:60px 1fr auto;gap:16px;align-items:center;padding:17px 18px;border:1px solid var(--line);border-radius:16px;background:var(--surface)}.lesson-row .num{width:52px;height:52px;border-radius:15px;background:var(--surface-2);display:grid;place-items:center;font-size:1.35rem}.lesson-row h3{margin:0}.lesson-row p{margin:.22rem 0;color:var(--muted)}.lesson-row.locked{opacity:.66}.progress-track{height:10px;background:var(--surface-2);border-radius:99px;overflow:hidden;border:1px solid var(--line)}.progress-track span{display:block;height:100%;background:linear-gradient(90deg,var(--brand),var(--accent));border-radius:99px}.progress-big{margin:18px 0 8px}
.profile-banner{display:flex;align-items:center;justify-content:space-between;gap:14px;background:var(--surface-2);border:1px solid var(--line);padding:14px 16px;border-radius:16px}.profile-id{font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-weight:800;color:var(--brand)}
.lesson-hero{display:grid;grid-template-columns:1fr 330px;gap:20px}.lesson-meta h1{font-size:2.45rem;line-height:1.08;margin:.35rem 0 .8rem}.objective-list{padding-left:1.25rem}.objective-list li{margin:.45rem 0}.agenda{display:grid;gap:8px}.agenda-row{display:grid;grid-template-columns:54px 1fr;gap:10px;padding:10px 0;border-bottom:1px solid var(--line)}.agenda-row:last-child{border:0}.agenda-row strong{color:var(--brand)}
.step-card{margin-top:18px;padding:0;overflow:hidden}.step-head{padding:18px 22px;border-bottom:1px solid var(--line);display:flex;justify-content:space-between;align-items:center;gap:14px;background:var(--surface-2)}.step-head h2{margin:0;font-size:1.2rem}.step-body{padding:24px}.step-card.locked .step-body{display:none}.step-card.locked .step-head{color:var(--muted)}.step-card.done .step-head{background:color-mix(in srgb,var(--ok) 9%,var(--surface))}.reading{max-width:86ch}.reading p{font-family:Georgia,"Times New Roman",serif;font-size:1.05rem;line-height:1.78;margin:0 0 1.12rem}.reading p:first-child:first-letter{font-size:2.7rem;float:left;line-height:.78;padding:.17rem .35rem 0 0;color:var(--brand);font-weight:700}.reading-tools{display:flex;gap:8px;justify-content:flex-end;margin-bottom:12px}.reading-tools button{border:1px solid var(--line);background:var(--surface);border-radius:10px;padding:6px 10px;color:var(--muted)}
.comprehension{margin-top:26px;border-top:2px solid var(--line);padding-top:24px}.comprehension h3{margin-top:0}.question{padding:18px;border:1px solid var(--line);border-radius:15px;margin:13px 0;background:var(--surface)}.question legend,.question>strong{font-weight:800;margin-bottom:10px;display:block}.option{display:flex;gap:10px;padding:9px 10px;border-radius:10px;margin:5px 0}.option:hover{background:var(--surface-2)}.option input{margin-top:.3rem}.feedback{margin-top:8px;padding:10px 12px;border-radius:10px;font-size:.91rem}.feedback.ok{background:color-mix(in srgb,var(--ok) 12%,transparent);color:var(--ok)}.feedback.no{background:color-mix(in srgb,var(--danger) 10%,transparent);color:var(--danger)}textarea,input[type="text"],select{width:100%;border:1px solid var(--line);border-radius:12px;background:var(--surface);color:var(--text);padding:11px 12px}textarea{min-height:120px;resize:vertical}.count{font-size:.8rem;color:var(--muted);text-align:right}.callout{border-left:4px solid var(--brand);background:var(--surface-2);padding:14px 16px;border-radius:0 12px 12px 0;margin:16px 0}.callout.warn{border-color:var(--warn)}.callout.ok{border-color:var(--ok)}
.lab{display:grid;gap:16px}.lab-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:14px}.lab-card{border:1px solid var(--line);background:var(--surface-2);padding:16px;border-radius:14px}.lab-card h4{margin:.1rem 0 .6rem}.timeline-grid{display:grid;gap:10px}.timeline-item{display:grid;grid-template-columns:100px 1fr;gap:12px;align-items:center;border:1px solid var(--line);border-radius:12px;padding:10px;background:var(--surface)}.neural-wrap{display:grid;grid-template-columns:1fr 1fr;gap:18px}.slider-row{display:grid;grid-template-columns:90px 1fr 62px;gap:10px;align-items:center;margin:9px 0}.neural-viz{border:1px solid var(--line);border-radius:16px;min-height:260px;display:grid;place-items:center;background:linear-gradient(135deg,var(--surface-2),var(--surface))}.neuron{width:110px;height:110px;border-radius:50%;display:grid;place-items:center;background:linear-gradient(135deg,var(--brand),var(--accent));color:white;font-weight:900;text-align:center}.formula{font-family:ui-monospace,SFMono-Regular,Menlo,monospace;background:var(--surface-2);border:1px solid var(--line);padding:10px;border-radius:10px}.tokens{display:flex;flex-wrap:wrap;gap:7px}.token{padding:6px 9px;border-radius:9px;background:color-mix(in srgb,var(--brand) 12%,var(--surface));border:1px solid color-mix(in srgb,var(--brand) 30%,var(--line));font-family:ui-monospace,SFMono-Regular,Menlo,monospace}.bars{display:grid;gap:8px}.bar-row{display:grid;grid-template-columns:100px 1fr 52px;gap:10px;align-items:center}.bar{height:12px;background:var(--surface-2);border-radius:99px;overflow:hidden}.bar span{display:block;height:100%;background:var(--brand);border-radius:99px}.case-grid{display:grid;gap:12px}.case{border:1px solid var(--line);border-radius:14px;padding:16px}.case h4{margin:0 0 8px}.case-actions{display:flex;gap:8px;flex-wrap:wrap}.case-actions button{border:1px solid var(--line);background:var(--surface);color:var(--text);border-radius:10px;padding:8px 10px}.case-actions button.selected{border-color:var(--brand);background:color-mix(in srgb,var(--brand) 10%,var(--surface));color:var(--brand)}
.quiz-summary{display:flex;align-items:center;gap:16px;padding:16px;border-radius:14px;background:var(--surface-2);margin-top:14px}.score-ring{width:68px;height:68px;border-radius:50%;border:7px solid var(--brand);display:grid;place-items:center;font-weight:900}.certificate-card{background:linear-gradient(145deg,color-mix(in srgb,var(--brand) 9%,var(--surface)),var(--surface));border:2px solid color-mix(in srgb,var(--brand) 35%,var(--line));padding:26px;border-radius:20px;text-align:center}.certificate-card h2{font-family:Georgia,"Times New Roman",serif;font-size:2rem;margin:.4rem 0}.certificate-code{font-family:ui-monospace,SFMono-Regular,Menlo,monospace;letter-spacing:.08em}.locked-note{text-align:center;padding:26px;color:var(--muted)}
.kpi-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:12px}.kpi{background:var(--surface-2);border-radius:14px;padding:15px}.kpi strong{display:block;font-size:1.65rem}.kpi span{color:var(--muted);font-size:.86rem}.teacher-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}.download-card{padding:22px}.download-card h3{margin:.4rem 0}.rubric{display:grid;gap:0;overflow:auto;border:1px solid var(--line);border-radius:14px}.rubric-row{display:grid;grid-template-columns:1.1fr repeat(4,1fr);min-width:860px}.rubric-row>div{padding:12px;border-right:1px solid var(--line);border-bottom:1px solid var(--line)}.rubric-row.head{font-weight:800;background:var(--surface-2)}.report-view{display:grid;gap:10px}.report-row{display:grid;grid-template-columns:1.4fr .5fr .5fr .7fr;gap:8px;padding:9px;border-bottom:1px solid var(--line)}
.modal-backdrop{position:fixed;inset:0;z-index:50;background:rgba(8,15,28,.55);display:grid;place-items:center;padding:18px}.modal{width:min(720px,100%);max-height:90vh;overflow:auto;background:var(--surface);border-radius:22px;border:1px solid var(--line);box-shadow:0 30px 90px rgba(0,0,0,.3);padding:25px}.modal h2{margin-top:0}.profile-list{display:grid;gap:10px}.profile-choice{display:flex;justify-content:space-between;align-items:center;gap:12px;border:1px solid var(--line);border-radius:13px;padding:12px}.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:12px}.form-grid .full{grid-column:1/-1}.small{font-size:.82rem;color:var(--muted)}.muted{color:var(--muted)}.danger-text{color:var(--danger)}.ok-text{color:var(--ok)}hr{border:0;border-top:1px solid var(--line);margin:22px 0}
.glossary-search{position:sticky;top:76px;z-index:5;background:var(--bg);padding:8px 0 14px}.glossary-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:12px}.glossary-item{padding:17px}.glossary-item h3{margin:0;color:var(--brand);font-size:1.05rem}.glossary-item p{margin:.45rem 0 0;color:var(--muted)}
footer{border-top:1px solid var(--line);padding:28px max(18px,calc((100vw - var(--max))/2));color:var(--muted);font-size:.78rem;background:var(--surface)}footer p{margin:.35rem 0}.footer-note{opacity:.8}.toast{position:fixed;right:20px;bottom:20px;z-index:100;background:#111827;color:white;padding:11px 15px;border-radius:12px;opacity:0;transform:translateY(8px);pointer-events:none;transition:.2s}.toast.show{opacity:1;transform:none}
@media(max-width:900px){.hero,.lesson-hero,.grid-3,.teacher-grid{grid-template-columns:1fr}.topbar{align-items:flex-start}.top-actions{max-width:54%}.kpi-grid{grid-template-columns:repeat(2,1fr)}.lab-grid,.neural-wrap,.glossary-grid{grid-template-columns:1fr}.lesson-row{grid-template-columns:52px 1fr}.lesson-row>.btn{grid-column:1/-1}.hero-copy{padding:28px}.lesson-meta h1{font-size:2rem}}
@media(max-width:600px){main{width:min(100% - 20px,var(--max));margin-top:20px}.topbar{position:relative;display:block;padding:10px}.top-actions{max-width:none;margin-top:9px;justify-content:flex-start}.top-actions .ghost{font-size:.8rem;padding:7px 9px}.brand small{display:none}.panel{padding:20px}.hero-copy{padding:22px}.form-grid{grid-template-columns:1fr}.form-grid .full{grid-column:auto}.timeline-item{grid-template-columns:1fr}.slider-row{grid-template-columns:75px 1fr 48px}.report-row{grid-template-columns:1fr}.kpi-grid{grid-template-columns:1fr 1fr}.reading p{font-size:1rem}.lesson-row{padding:14px}}
@media print{.topbar,footer,.no-print,.btn-row,.ghost,.toast{display:none!important}body{background:white;color:#111}main{width:100%;margin:0}.panel,.card{box-shadow:none;border-color:#bbb}.certificate-card{min-height:80vh;display:flex;flex-direction:column;justify-content:center}}

/* === v4 · autonomia, contenuti e guida incorporata === */
.autonomy-steps{display:grid;gap:10px;margin:18px 0}.autonomy-step{display:grid;grid-template-columns:42px 1fr;gap:12px;align-items:start;padding:13px 14px;border:1px solid var(--line);border-radius:14px;background:var(--surface-2)}.autonomy-step .step-n{width:34px;height:34px;border-radius:50%;display:grid;place-items:center;background:var(--brand);color:#fff;font-weight:900}.autonomy-step strong{display:block;margin-bottom:2px}.autonomy-step p{margin:0;color:var(--muted)}
.content-outline{display:grid;gap:12px}.content-outline h3{margin:.1rem 0}.content-outline ul{margin:.35rem 0 0;padding-left:1.25rem}.content-outline li{margin:.5rem 0}.outline-grid{display:grid;grid-template-columns:1fr 1fr;gap:14px}.study-focus{margin:0 0 20px;padding:14px 16px;border-radius:14px;background:color-mix(in srgb,var(--brand) 8%,var(--surface));border:1px solid color-mix(in srgb,var(--brand) 23%,var(--line))}.study-focus strong{color:var(--brand)}
.keyword-box{margin-top:14px;border:1px solid var(--line);border-radius:15px;padding:14px;background:var(--surface-2)}.keyword-box h3{margin:.1rem 0 .7rem;font-size:1rem}.keyword-grid{display:flex;gap:7px;flex-wrap:wrap}.keyword{display:inline-flex;padding:5px 9px;border-radius:999px;background:var(--surface);border:1px solid var(--line);font-size:.82rem;font-weight:750}.keyword-defs{display:grid;gap:7px;margin-top:10px}.keyword-def{font-size:.86rem;color:var(--muted)}.keyword-def strong{color:var(--text)}
.coach{margin:18px 0;padding:17px 18px;border-radius:18px;border:1px solid color-mix(in srgb,var(--brand) 34%,var(--line));background:linear-gradient(135deg,color-mix(in srgb,var(--brand) 8%,var(--surface)),var(--surface));display:grid;grid-template-columns:1fr auto;gap:16px;align-items:center}.coach h3{margin:.1rem 0 .35rem}.coach p{margin:0;color:var(--muted)}.coach .next-action{font-weight:800;color:var(--text);margin-top:5px}.coach-actions{display:flex;gap:8px;flex-wrap:wrap;justify-content:flex-end}
.notebook{margin:16px 0;border:1px dashed color-mix(in srgb,var(--brand) 45%,var(--line));border-radius:16px;padding:16px;background:color-mix(in srgb,var(--brand) 4%,var(--surface))}.notebook summary{cursor:pointer;font-weight:850}.notebook textarea{margin-top:12px;min-height:110px}.lesson-content-map{margin:16px 0 0;padding:16px;border-radius:16px;background:var(--surface-2);border:1px solid var(--line)}.lesson-content-map h3{margin:.1rem 0 .5rem}.lesson-content-map ul{margin:.3rem 0;padding-left:1.2rem}.lesson-content-map li{margin:.42rem 0}.learning-summary{margin-top:18px;border:1px solid color-mix(in srgb,var(--ok) 35%,var(--line));background:color-mix(in srgb,var(--ok) 7%,var(--surface));border-radius:18px;padding:20px}.learning-summary h2,.learning-summary h3{margin-top:.1rem}.learning-summary-grid{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.teacher-year-map{margin:18px 0 26px}.teacher-year-map>h3{font-size:1.35rem;margin-bottom:8px}.content-hours{display:grid;grid-template-columns:repeat(2,1fr);gap:14px}.content-hour{border:1px solid var(--line);border-radius:16px;padding:17px;background:var(--surface)}.content-hour h4{margin:.2rem 0 .55rem}.content-hour ul{padding-left:1.15rem;margin:.45rem 0}.content-hour li{margin:.4rem 0}.hour-label{display:inline-flex;align-items:center;padding:4px 9px;border-radius:999px;background:color-mix(in srgb,var(--brand) 10%,var(--surface));color:var(--brand);font-size:.77rem;font-weight:900;text-transform:uppercase;letter-spacing:.05em}.objective-box{margin-top:12px;padding-top:12px;border-top:1px solid var(--line)}.objective-box strong{display:block;margin-bottom:5px}.objective-box ol{padding-left:1.2rem;margin:.3rem 0}.objective-box li{margin:.38rem 0}.next-lesson-preview{margin-top:10px;padding:10px 12px;border-radius:12px;background:var(--surface-2);color:var(--muted);font-size:.88rem}
@media(max-width:900px){.outline-grid,.learning-summary-grid,.content-hours{grid-template-columns:1fr}.coach{grid-template-columns:1fr}.coach-actions{justify-content:flex-start}}
@media(max-width:600px){.autonomy-step{grid-template-columns:36px 1fr}.autonomy-step .step-n{width:30px;height:30px}.coach-actions .btn,.coach-actions .ghost{width:100%}}

/* v5 · lavoro finale annuale */
.final-project{border:2px solid color-mix(in srgb,var(--primary) 28%,transparent);background:linear-gradient(180deg,color-mix(in srgb,var(--primary) 5%,var(--panel)),var(--panel));}
.final-project.done{border-color:color-mix(in srgb,#14804a 45%,transparent);}
.project-case{margin:18px 0;line-height:1.7;}
.project-field{padding:18px 0;border-top:1px solid var(--line);}
.project-field:first-of-type{border-top:0;}
.project-field label>strong{display:block;font-size:1.02rem;margin-bottom:6px;}
.project-field label>span{display:block;color:var(--muted);line-height:1.55;margin-bottom:10px;}
.project-field textarea{min-height:150px;width:100%;resize:vertical;}
.project-field small{display:block;text-align:right;color:var(--muted);margin-top:6px;}
.integrity-check{display:flex;gap:10px;align-items:flex-start;padding:16px;border:1px solid var(--line);border-radius:14px;background:var(--soft);line-height:1.5;margin:16px 0;}
.integrity-check input{margin-top:4px;}


/* === base precedente · leggibilità, accesso docente e materiali === */
.keyword-defs{display:grid;gap:12px;margin-top:14px}.keyword-def{display:grid;grid-template-columns:minmax(150px,220px) 1fr;gap:18px;align-items:start;padding:11px 12px;border-radius:12px;background:var(--surface);border:1px solid var(--line)}.keyword-def strong{display:block;color:var(--text);line-height:1.35}.keyword-def span{display:block;color:var(--muted);line-height:1.55}.study-keyword{font-weight:800;color:color-mix(in srgb,var(--brand) 82%,var(--text));background:color-mix(in srgb,var(--brand) 7%,transparent);padding:0 .08em;border-radius:.2em}.glossary-item h3{display:block;margin:0 0 .7rem;color:var(--brand);font-size:1.08rem;line-height:1.3}.glossary-item p{display:block;margin:0;color:var(--muted);line-height:1.6}.teacher-login{max-width:720px;margin:40px auto}.teacher-login form{display:grid;gap:14px;margin-top:20px}.teacher-login input{margin-top:7px}.download-stack{display:grid;gap:9px;margin-top:14px}.certificate-downloads{grid-template-columns:repeat(3,1fr)}
@media(max-width:900px){.keyword-def{grid-template-columns:1fr;gap:6px}.certificate-downloads{grid-template-columns:1fr}}

/* === v7 · testi, immagini didattiche e soluzioni docente === */
.reading{max-width:90ch}
.reading p{font-size:1.075rem;line-height:1.82;margin-bottom:1.22rem}
.reading-legend{margin:0 0 18px;padding:10px 13px;border-left:4px solid var(--brand);background:color-mix(in srgb,var(--brand) 5%,var(--surface));border-radius:8px;color:var(--muted);font-family:system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;font-size:.9rem;line-height:1.5}
.reading-legend strong{color:var(--text)}
.study-keyword{font-weight:850;color:var(--text);background:linear-gradient(transparent 68%,color-mix(in srgb,var(--brand) 24%,transparent) 68%);padding:0 .04em;border-radius:0}
.reading-example{margin:18px 0 24px;padding:16px 18px;border:1px solid color-mix(in srgb,var(--brand) 24%,var(--line));border-radius:16px;background:color-mix(in srgb,var(--brand) 5%,var(--surface));font-family:system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif}
.reading-example>span{display:block;font-weight:850;color:var(--brand);margin-bottom:6px}
.reading-example p{font-family:inherit;font-size:.98rem;line-height:1.65;margin:0}
.reading-takeaways{margin:22px 0 4px;padding:18px 20px;border-radius:16px;background:var(--surface-2);border:1px solid var(--line);font-family:system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif}
.reading-takeaways>strong{display:block;margin-bottom:8px;font-size:1rem}
.reading-takeaways ul{margin:.2rem 0 0;padding-left:1.2rem}.reading-takeaways li{margin:.45rem 0;line-height:1.55}
.reading-visual{margin:24px 0 28px;padding:14px;border:1px solid var(--line);border-radius:18px;background:var(--surface-2);overflow:hidden}
.reading-visual svg{display:block;width:100%;height:auto;max-height:360px}
.reading-visual figcaption{margin:8px 4px 0;color:var(--muted);font-family:system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;font-size:.86rem;line-height:1.45}
.rv-box{fill:var(--surface);stroke:var(--line);stroke-width:2}.rv-soft-box{fill:color-mix(in srgb,var(--brand) 6%,var(--surface));stroke:color-mix(in srgb,var(--brand) 28%,var(--line));stroke-width:2}.rv-primary-box{fill:color-mix(in srgb,var(--brand) 13%,var(--surface));stroke:var(--brand);stroke-width:2}.rv-primary{fill:var(--brand)}.rv-soft{fill:color-mix(in srgb,var(--brand) 22%,var(--surface))}.rv-text{fill:var(--text);font-family:system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif}.rv-invert{fill:#fff;font-family:system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif}.rv-label{font-size:18px;font-weight:800}.rv-small{font-size:15px;font-weight:650}.rv-line{fill:none;stroke:color-mix(in srgb,var(--text) 55%,transparent);stroke-width:2.5}.rv-arrow{fill:color-mix(in srgb,var(--text) 60%,transparent)}
.teacher-solution-year{margin:0 0 18px}.solution-lesson{border:1px solid var(--line);border-radius:14px;margin:11px 0;background:var(--surface)}.solution-lesson>summary{cursor:pointer;padding:14px 16px;line-height:1.45}.solution-lesson[open]>summary{border-bottom:1px solid var(--line);background:var(--surface-2)}.solution-body{padding:16px}.solution-reading{padding:14px 0;border-bottom:1px solid var(--line)}.solution-reading:last-child{border-bottom:0}.solution-reading h4{margin:.2rem 0 1rem}.solution-reading ol{padding-left:1.25rem}.solution-reading li{margin:0 0 14px;line-height:1.55}.solution-reading li>p{margin:.35rem 0;color:var(--muted)}.solution-answer{margin:.45rem 0;padding:8px 10px;border-radius:10px;background:color-mix(in srgb,var(--ok) 9%,var(--surface));border-left:3px solid var(--ok)}.open-solution{margin-top:18px;padding:14px 16px;border-radius:14px;background:var(--surface-2)}.open-solution p{margin:.45rem 0}.open-solution ul{margin:.45rem 0 0;padding-left:1.2rem}.open-solution li{margin:.4rem 0}
@media(max-width:700px){.reading-visual{padding:8px}.reading-visual figcaption{font-size:.8rem}.rv-label{font-size:15px}.rv-small{font-size:13px}.reading p{font-size:1.02rem}}

.reading-visual{margin:18px auto;max-width:760px}.reading-visual svg{width:100%;height:auto;display:block}.study-keyword{background:rgba(255,229,100,.35);padding:0 .18rem;border-radius:.25rem}.reading-example,.reading-takeaways{box-shadow:0 10px 28px rgba(27,39,78,.08)}

.reading-photo{margin:20px auto;max-width:780px;background:var(--card,#fff);border:1px solid rgba(60,90,140,.14);border-radius:18px;padding:10px;box-shadow:0 12px 30px rgba(27,39,78,.08)}
.reading-photo img{display:block;width:100%;height:auto;border-radius:12px}
.reading-photo figcaption{padding:10px 8px 4px;color:var(--muted,#5a667a);font-size:.95rem;line-height:1.4}

/* v14: glossary/keyword cards redesigned */
.keyword-panel{margin:22px 0;padding:18px;border:1px solid rgba(60,90,140,.18);border-radius:22px;background:linear-gradient(135deg,rgba(239,246,255,.96),rgba(255,255,255,.94));box-shadow:0 12px 30px rgba(27,39,78,.06)}
.keyword-head{display:flex;gap:16px;align-items:flex-start;justify-content:space-between;margin-bottom:12px}.keyword-head h3{margin:.15rem 0}.keyword-head p{margin:.25rem 0 0;color:var(--muted,#5a667a)}
.keyword-chip-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:12px}.keyword-card{border:1px solid rgba(60,90,140,.17);background:#fff;border-radius:16px;overflow:hidden}.keyword-card summary{list-style:none;cursor:pointer;padding:12px 14px;display:flex;align-items:center;justify-content:space-between;gap:12px;font-weight:800;color:#172033}.keyword-card summary::-webkit-details-marker{display:none}.keyword-card summary b{display:inline-grid;place-items:center;width:26px;height:26px;border-radius:50%;background:#eaf2ff;color:#275fcf;font-size:1.05rem}.keyword-card[open] summary b{transform:rotate(45deg);background:#275fcf;color:white}.keyword-card p{margin:0;padding:0 14px 14px 14px;color:#374151;line-height:1.45}.keyword-box{display:none!important}.project-case{font-size:1.05rem}.final-project .lead{font-weight:600}