:root{color-scheme:light;--ink:#0a2540;--muted:#516478;--blue:#075ed0;--cyan:#02a9cc;--line:#dde5ee;--surface:#fff;--bg:#f4f7fb;--radius:16px;font-family:Arial,Helvetica,sans-serif}*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:0}body{margin:0;background:var(--bg);color:var(--ink);font-size:15px;line-height:1.65}a{color:var(--blue);text-underline-offset:4px}button,input{font:inherit}button,a,input,summary{touch-action:manipulation}button{cursor:pointer}[hidden]{display:none!important}h1,h2,h3,p{margin-top:0}h1{font-size:clamp(26px,3vw,34px);line-height:1.2;letter-spacing:-1px;margin-bottom:10px}h2{font-size:24px;line-height:1.3;letter-spacing:-.5px}h3{font-size:19px;line-height:1.4}p{margin-bottom:16px}.sidebar{position:fixed;inset:0 auto 0 0;width:246px;background:#fff;border-right:1px solid var(--line);padding:32px 22px;display:flex;flex-direction:column;z-index:40}.brand{text-decoration:none;color:var(--ink);display:block;padding:0 12px 25px}.brand img{width:170px;height:auto;display:block;object-fit:contain}.brand>span{display:block;font-size:15px;letter-spacing:5px;font-weight:700;margin-top:15px;border-top:1px solid var(--line);padding-top:14px}.brand small{display:block;font-size:9px;letter-spacing:1.8px;font-weight:400;color:var(--muted);margin-top:5px}.nav-label,.eyebrow{text-transform:uppercase;letter-spacing:1.5px;font-size:10px;font-weight:700;color:var(--blue)}.nav-label{margin:22px 12px 10px;color:var(--muted)}.nav-link{display:flex;align-items:center;gap:12px;padding:12px;border-radius:9px;color:var(--muted);text-decoration:none;font-weight:600;margin:5px 0;min-height:48px}.nav-link>span{font-size:23px;line-height:1}.nav-link.active,.nav-link:hover{background:#edf4ff;color:var(--blue)}.sidebar-bottom{margin-top:auto;font-size:12px}.brand-note{border:1px solid var(--line);background:#f8fafc;border-radius:12px;padding:15px;margin-bottom:18px;font-weight:700}.brand-note p{font-size:11px;line-height:1.7;font-weight:400;color:var(--muted);margin:9px 0 0}.status-dot{display:inline-block;width:7px;height:7px;border-radius:50%;background:#14b99b;margin-right:6px}.app-layout{margin-left:246px}.topbar{height:78px;position:sticky;top:0;z-index:30;background:rgba(255,255,255,.98);border-bottom:1px solid var(--line);padding:0 38px;display:flex;align-items:center;justify-content:space-between;gap:14px}.topbar-title{font-size:13px;font-weight:600}.topbar-actions{display:flex;align-items:center;gap:24px}.connection{font-size:11px;color:#256f53}.connection:before{content:'';display:inline-block;background:currentColor;width:6px;height:6px;margin-right:7px;border-radius:50%}.language{display:flex;background:#f1f5fa;padding:3px;border-radius:8px}.language a{font-size:11px;font-weight:700;text-decoration:none;padding:7px 10px;min-height:34px;display:grid;place-items:center}.language a[aria-current]{background:white;box-shadow:0 1px 4px #0a254015;border-radius:6px}.avatar{display:grid;place-items:center;width:36px;height:36px;border-radius:50%;background:#e6f1ff;color:var(--blue);font-size:13px;font-weight:700}main{max-width:1560px;margin:auto;padding:34px 38px 45px}.page-heading{display:flex;align-items:center;justify-content:space-between;gap:24px;margin-bottom:25px}.page-heading p:last-child{margin-bottom:0}.muted{color:var(--muted)}.small{font-size:13px}.button{border:1px solid transparent;background:var(--blue);color:#fff;border-radius:8px;display:inline-flex;align-items:center;justify-content:center;gap:15px;padding:12px 20px;font-size:13px;font-weight:700;text-decoration:none;min-height:46px;line-height:1.4}.button:hover{background:#064ca8}.button.secondary{background:white;color:var(--ink);border-color:#cad7e5}.button.secondary:hover{background:#eaf2ff;border-color:var(--blue)}.button.compact{padding:10px 15px;font-size:12px;min-height:44px}.hero{background:var(--ink);border-radius:18px;display:grid;grid-template-columns:1.12fr 1fr;overflow:hidden;color:white;min-height:302px}.hero-copy{padding:36px;position:relative;z-index:1}.hero-copy h2{font-size:clamp(25px,2.6vw,38px);max-width:560px;line-height:1.13;letter-spacing:-1.1px;margin:18px 0}.hero-copy p{color:#c4d5e7;max-width:530px;font-size:14px;line-height:1.8}.pill{display:inline-block;color:#bceeff;border:1px solid #4e7290;background:#163c57;border-radius:5px;padding:4px 8px;font-size:9px;font-weight:700;text-transform:uppercase;letter-spacing:1px}.hero-actions{display:flex;align-items:center;gap:20px;flex-wrap:wrap;margin-top:25px}.hero-actions>span{font-size:11px;color:#c4d5e7}.hero-visual{position:relative;min-height:280px}.hero-visual:after{content:'';position:absolute;inset:0;background:linear-gradient(90deg,#0a2540 0%,transparent 45%),linear-gradient(0deg,#0a254080,transparent 70%)}.hero-visual img{width:100%;height:100%;position:absolute;object-fit:cover;filter:saturate(.75)}.visual-label{position:absolute;bottom:25px;left:24px;right:24px;z-index:2;background:#0a2540bd;border:1px solid #ffffff30;backdrop-filter:blur(6px);padding:11px 15px;border-radius:8px;font-size:11px}.release-note{font-size:11px;color:var(--muted);padding:13px 0;margin-bottom:8px;line-height:1.8}.badge{display:inline-block;font-size:9px;font-weight:700;letter-spacing:.8px;text-transform:uppercase;background:#edf4ff;color:#0755b5;padding:4px 8px;border-radius:5px}.release-note .badge{margin-right:7px}.stats-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:18px;margin-bottom:28px}.stat-card{background:white;border:1px solid var(--line);border-radius:12px;padding:20px;display:flex;gap:16px;align-items:center}.stat-card .muted{font-size:11px}.stat-card strong{display:block;font-size:25px;line-height:1.35;letter-spacing:-.5px}.stat-card small{display:block;font-size:10px;color:var(--muted);margin-top:3px}.stat-symbol{font-size:23px;border-radius:11px;width:46px;height:46px;display:grid;place-items:center;flex-shrink:0}.blue{background:#edf4ff;color:var(--blue)}.cyan{background:#e6f8fc;color:#007b94}.navy{background:#edf0f5;color:var(--ink)}.dashboard-columns{display:grid;grid-template-columns:minmax(0,1fr) 285px;gap:25px}.section-heading{display:flex;justify-content:space-between;align-items:center;margin-bottom:18px}.section-heading h2{font-size:22px;margin:0}.section-heading .eyebrow{margin-bottom:4px}.count{font-size:10px;color:var(--muted);background:#e9eef4;padding:5px 9px;border-radius:5px}.card{background:white;border:1px solid var(--line);border-radius:var(--radius);padding:24px;margin-bottom:22px;min-width:0}.card h2{font-size:22px}.lesson-card{background:white;border:1px solid var(--line);border-radius:14px;overflow:hidden;margin-bottom:20px}.lesson-cover{height:160px;background:radial-gradient(ellipse at 80% 30%,#105c88,transparent 55%),repeating-linear-gradient(90deg,transparent 0,transparent 39px,#ffffff07 40px),repeating-linear-gradient(0deg,transparent 0,transparent 39px,#ffffff07 40px),#0a2540;position:relative;display:grid;place-items:center;color:white}.lesson-number{position:absolute;top:18px;left:20px;border:1px solid #ffffff40;border-radius:7px;padding:2px 8px;font-size:12px;color:#c1e5ff}.network-glyph{font-size:50px;line-height:1;display:flex;gap:12px;align-items:center;color:#e0f5ff}.network-glyph span{font-size:25px;color:#2bd3ef}.cover-label{position:absolute;right:20px;bottom:16px;font-size:9px;letter-spacing:3px;color:#a0c9e4}.lesson-card-body{padding:24px}.lesson-meta{display:flex;gap:12px;align-items:center;font-size:10px;color:var(--muted);flex-wrap:wrap}.lesson-card h3{font-size:22px;margin:15px 0 10px}.lesson-card p{font-size:13px}.lesson-bottom{display:flex;justify-content:space-between;align-items:center;border-top:1px solid var(--line);padding-top:17px;margin-top:18px;gap:16px}.lesson-bottom>span{font-size:11px}.success{color:#176844;font-weight:600;margin:12px 0 0}.progress-card h3{margin-top:9px}.progress-display{display:flex;align-items:center;gap:18px;margin:20px 0}.progress-display>strong{font-size:40px;line-height:1}.progress-display small{font-size:20px}.progress-display>span{font-size:11px;color:var(--muted);max-width:90px}progress{width:100%;height:8px;border:none;appearance:none;border-radius:10px;overflow:hidden;background:#e6edf5}progress::-webkit-progress-bar{background:#e6edf5}progress::-webkit-progress-value{background:var(--blue);border-radius:10px}progress::-moz-progress-bar{background:var(--blue)}.progress-card .small{font-size:11px;margin:14px 0 0}.dark-card{background:var(--ink);color:white;border-color:var(--ink)}.dark-card .eyebrow,.dark-card a{color:#84def1}.dark-card p{font-size:13px;color:#c4d5e7}.dark-card a{font-size:12px;font-weight:700}.right-column .card h3{font-size:18px}.roadmap{background:white;border:1px solid var(--line);border-radius:12px;padding:20px}.roadmap summary{font-size:13px}.module-list{padding-left:23px;margin:20px 0 0}.module-list li{padding:10px 0;border-bottom:1px solid var(--line);font-size:13px}.module-list small{display:block;font-size:10px;color:var(--muted)}summary{cursor:pointer;padding:8px 0;font-weight:700;min-height:44px}.logout-form{margin-top:25px}footer{max-width:1560px;margin:auto;border-top:1px solid var(--line);padding:22px 38px;display:flex;justify-content:space-between;gap:12px;color:var(--muted);font-size:10px}.icon-button{border:0;background:transparent;font-size:24px;min-width:44px;min-height:44px;border-radius:6px;color:var(--ink)}#menu-toggle{display:none}.skip{position:fixed;top:-100px;left:20px;z-index:100;background:white;padding:12px}.skip:focus{top:10px}*:focus-visible{outline:3px solid #0875ed;outline-offset:4px}.breadcrumbs{font-size:12px;margin-bottom:22px}.lesson-title{font-size:clamp(26px,3vw,38px);max-width:900px}.lesson-layout{display:grid;grid-template-columns:minmax(0,800px) 250px;gap:35px}.reading{min-width:0}.reading h2{margin-top:32px;font-size:23px}.reading p{font-size:16px;line-height:1.9}.objective-card{background:#eaf2ff;padding:24px;border-left:3px solid var(--blue);border-radius:0 12px 12px 0}.objective-card p{margin-bottom:0;font-size:15px}.reading-toolbar{display:flex;justify-content:space-between;gap:14px;align-items:center;margin:18px 0;font-size:11px;color:var(--muted)}.reading-section{padding-top:8px}.lesson-toc{align-self:start;position:sticky;top:100px}.lesson-toc nav{display:flex;flex-direction:column;gap:10px}.lesson-toc a{font-size:12px;color:var(--muted);text-decoration:none;border-left:2px solid var(--line);padding:5px 0 5px 12px}.lesson-toc a:hover{border-color:var(--blue);color:var(--blue)}.lesson-toc .small{font-size:11px;margin-top:24px}.diagram{font-size:16px!important;font-weight:700;color:var(--blue);overflow-wrap:anywhere}.diagram-card h2{margin-top:0}.diagram-card .small{font-size:13px}.notice{background:#edf4ff;border-left:3px solid var(--blue);padding:15px;font-size:13px!important;line-height:1.7!important}.decision{border:1px solid var(--line);border-radius:10px;background:white;margin:12px 0;padding:12px 18px}.decision p{font-size:14px;padding-top:10px}.decision summary{font-size:14px}fieldset{padding:20px;border:1px solid var(--line);border-radius:12px;margin:22px 0;background:white;min-width:0}legend{font-weight:700;font-size:15px;padding:0 8px;max-width:100%}.answer{display:flex;gap:12px;align-items:flex-start;line-height:1.6;padding:12px;border:1px solid var(--line);border-radius:8px;margin:10px 0;font-size:14px;cursor:pointer}.answer:has(input:checked){background:#edf4ff;border-color:var(--blue)}input[type=radio],input[type=checkbox]{width:20px;height:20px;flex-shrink:0;accent-color:var(--blue)}input[type=radio]{margin-top:2px}input:not([type=radio]):not([type=checkbox]){display:block;width:100%;padding:11px 13px;border:1px solid #9bafc3;border-radius:7px;background:#fff;color:var(--ink);min-height:46px;margin:7px 0 17px}label{font-size:13px;font-weight:600}.feedback-panel{padding:24px;border:1px solid #92b9ed;background:#eaf2ff;border-radius:14px}.score{font-size:40px;color:var(--blue)}.feedback-item{border-top:1px solid #c2d5ed;padding:15px 0}.feedback-item p{font-size:14px;margin:8px 0 0}.check-list{list-style:none;padding:0}.check-list li{padding:10px 0 10px 26px;position:relative}.check-list li:before{content:'✓';position:absolute;left:0;color:var(--blue)}.resource-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:24px}.resource-grid .card{align-self:start}.glossary-entry{padding:15px 0;border-bottom:1px solid var(--line)}dt{font-weight:700}dd{margin:6px 0;color:var(--muted)}.calculation-result:empty{display:none}.calculation-result{padding:20px;background:#eaf2ff;border-radius:10px;margin:18px 0;color:var(--ink);font-weight:600}.install-toast{position:fixed;bottom:20px;left:calc(50% + 100px);transform:translateX(-50%);z-index:60;background:#fff;box-shadow:0 10px 50px #0a254030;border:1px solid var(--line);padding:14px 18px;border-radius:12px;display:flex;gap:16px;align-items:center;max-width:calc(100vw - 32px);font-size:12px}.errorlist{color:#a02424;padding-left:20px}.reading .card .small{font-size:13px}section[id]{scroll-margin-top:95px}
@media(min-width:1500px){.hero-copy{padding:44px}.hero{min-height:340px}}@media(max-width:1200px){.sidebar{width:210px;padding:24px 15px}.brand img{width:155px}.app-layout{margin-left:210px}main{padding:26px}.topbar{padding:0 26px}.dashboard-columns{grid-template-columns:minmax(0,1fr) 250px;gap:20px}.hero-copy{padding:28px}.hero{grid-template-columns:1.2fr 1fr}.lesson-layout{grid-template-columns:minmax(0,1fr)}.lesson-toc{position:static;grid-row:1}.lesson-toc nav{display:grid;grid-template-columns:repeat(2,minmax(0,1fr))}.lesson-toc .small{margin-bottom:0}.stat-card{padding:16px;gap:10px}}@media(max-width:980px){.dashboard-columns{grid-template-columns:1fr}.right-column{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:18px}.right-column .card{margin:0}.right-column .card:last-child{grid-column:1/-1}.hero{grid-template-columns:1fr}.hero-visual{display:none}.stats-grid{gap:10px}.stat-symbol{display:none}.page-heading>.button{display:none}.resource-grid{grid-template-columns:1fr}.install-toast{left:calc(50% + 100px)}}@media(max-width:760px){.sidebar{transform:translateX(-100%);width:246px;box-shadow:15px 0 50px #0a254020;top:70px}.sidebar.is-open{transform:translateX(0)}.app-layout{margin-left:0}.topbar{height:70px;padding:0 16px;gap:8px}#menu-toggle{display:block}.topbar-title{font-size:11px;margin-right:auto}.topbar-actions{gap:12px}.connection{display:none}main{padding:24px 16px}.page-heading{margin-bottom:22px}h1{font-size:27px;letter-spacing:-.7px}.hero-copy{padding:25px}.hero-copy h2{font-size:31px}.hero-copy p{font-size:13px}.stats-grid{grid-template-columns:repeat(3,minmax(0,1fr));gap:8px}.stat-card{padding:13px 10px;align-items:flex-start}.stat-card strong{font-size:19px}.stat-card .muted{font-size:10px}.stat-card small{font-size:9px}.right-column{grid-template-columns:1fr}.right-column .card:last-child{grid-column:auto}.lesson-card-body{padding:19px}.lesson-card h3{font-size:20px}.lesson-bottom{flex-wrap:wrap}.lesson-toc{padding:18px}.lesson-toc nav{grid-template-columns:1fr}.reading p{font-size:15px}.reading-toolbar{flex-wrap:wrap}.reading-toolbar button{width:100%}.lesson-title{font-size:28px}.card{padding:20px}.resource-grid{gap:0}.install-toast{left:50%;width:calc(100vw - 32px);bottom:12px;gap:10px;padding:12px}.install-toast>span{flex:1}footer{padding:20px 16px;flex-direction:column}.language a{padding:7px 10px;min-height:44px}.avatar{width:32px;height:32px}.hero-actions{gap:14px}.hero-actions .button{width:100%}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,*:before,*:after{animation:none!important;transition:none!important}}

.mobile-title{display:none}body[data-lang=es] .language a[lang=es],body[data-lang=en] .language a[lang=en]{background:white;border-radius:6px;box-shadow:0 1px 4px #0a254015}@media(max-width:760px){.mobile-title{display:inline;font-size:14px;font-weight:700}.desktop-title{display:none}}

/* v0.3 assessment and accessible interaction components */
.nav-link svg{flex:none;width:22px;height:22px}.nav-link>span:has(svg){display:flex}.concept-map{display:flex;gap:1.3rem;list-style:none;padding:1rem 0;counter-reset:concept}.concept-map>li,.concept-map>span{position:relative;flex:1;background:#eaf2ff;color:#12385d;border:1px solid #b6cdec;border-radius:12px;padding:1.2rem .8rem;text-align:center;font-weight:700}.concept-map>*+*::before{content:'→';position:absolute;left:-1.1rem;color:#075ed0}.lab-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:18px;margin:24px 0 48px}.lab-grid h2{font-size:1.2rem}.assessment-form,.activity-form{max-width:900px}.assessment-form fieldset,.activity-form fieldset{margin:24px 0;min-width:0}.assessment-form legend,.activity-form legend{font-weight:700;padding:0 8px;max-width:100%;white-space:normal}.order-list{list-style:none;padding:0;display:grid;gap:10px}.order-list li{display:flex;align-items:center;gap:12px;padding:12px;border:1px solid #c7d7ec;background:#f6f9fe;border-radius:10px}.order-position{background:#0a2540;color:white;border-radius:50%;width:30px;height:30px;display:grid;place-items:center;flex:none}.order-text{flex:1}.move-button{min-width:44px;min-height:44px;background:white;border:1px solid #b2c8e3;border-radius:8px;font-size:20px;color:#0a2540;cursor:pointer}.move-button:disabled{opacity:.35;cursor:default}select,textarea{max-width:100%;font:inherit;border:1px solid #b2c8e3;border-radius:8px;padding:12px;background:white;color:#0a2540}select{width:100%}textarea{width:100%;min-height:280px}.result-score{font-size:clamp(3rem,8vw,5rem);color:#075ed0}.needs-review{border-left:4px solid #b94b06;padding-left:16px}.floor-plan{display:grid;grid-template-columns:1fr 1fr;gap:30px;border:6px solid #143854;background:#eaf2ff;padding:30px;margin:24px 0}.floor-plan span{padding:20px;background:white;border:2px dashed #5a7fa9}.choice-grid{display:grid;gap:12px}.course-search{margin-bottom:24px}.credential{border-top:6px solid #075ed0}.public-link{overflow-wrap:anywhere}.nav-link{min-height:48px}button:focus-visible,a:focus-visible,input:focus-visible,select:focus-visible,textarea:focus-visible,summary:focus-visible{outline:3px solid #995c00;outline-offset:3px}[hidden]{display:none!important}
@media(max-width:1050px){.lab-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}@media(max-width:760px){.lab-grid{grid-template-columns:1fr}.concept-map{flex-direction:column;gap:20px}.concept-map>*+*::before{content:'↓';left:50%;top:-24px}.order-list li{gap:6px;padding:8px}.order-text{font-size:.9rem}.floor-plan{padding:12px;gap:12px}.floor-plan span{padding:12px}.assessment-form legend{font-size:1rem}.activity-form .card,.assessment-form .card{padding:16px}}

@media(max-width:760px){.stats-grid:has(>.card){grid-template-columns:1fr}.order-list li{touch-action:pan-y}.sidebar{overflow-y:auto}.order-text{overflow-wrap:anywhere}}