:root{--ink:#18334a;--muted:#5c7180;--paper:#fffdf9;--cream:#f7f0e5;--sky:#dceef4;--blue:#176888;--blue-dark:#124d66;--sage:#dcebdc;--plum:#eadff0;--coral:#ef8d74;--line:#d7e0e3;--shadow:0 18px 44px rgba(35,64,75,.12);font-family:Nunito,"Avenir Next",Avenir,system-ui,sans-serif;color:var(--ink);background:#f7f3ec}
*{box-sizing:border-box}body{margin:0;min-height:100vh;background:radial-gradient(circle at 10% 0,#fff9e9 0,transparent 30%),radial-gradient(circle at 90% 5%,#e4f4f4 0,transparent 34%),#f7f3ec}button,input{font:inherit}button{color:inherit}.shell{max-width:1280px;margin:auto;padding:24px}.hero{background:rgba(255,253,249,.95);border:1px solid rgba(23,104,136,.13);border-radius:32px;padding:clamp(28px,6vw,66px);box-shadow:var(--shadow);position:relative;overflow:hidden}.hero:after{content:"";position:absolute;width:280px;height:280px;border-radius:50%;right:-90px;top:-110px;background:#dceef4;opacity:.7}.brandline{display:flex;flex-wrap:wrap;align-items:center;gap:12px;margin-bottom:28px;position:relative;z-index:1}.brand,.license,.author{display:inline-flex;align-items:center;gap:8px;min-height:42px;padding:8px 14px;border:1px solid var(--line);border-radius:999px;background:#fff;text-decoration:none;font-weight:800}.brand{color:#255a87}.license{font-size:13px;letter-spacing:.04em}.hero h1{max-width:760px;font-size:clamp(38px,7vw,72px);line-height:1.02;margin:0 0 18px;letter-spacing:-.035em;position:relative;z-index:1}.hero p{max-width:760px;font-size:clamp(18px,2vw,22px);line-height:1.55;color:var(--muted);margin:0;position:relative;z-index:1}.level-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;margin-top:28px}.level-card{text-align:left;border:0;border-radius:26px;padding:28px;min-height:260px;cursor:pointer;box-shadow:0 10px 28px rgba(35,64,75,.09);transition:.2s transform,.2s box-shadow}.level-card:hover,.level-card:focus-visible{transform:translateY(-4px);box-shadow:var(--shadow);outline:4px solid rgba(23,104,136,.18)}.level-card.l1{background:var(--sky)}.level-card.l2{background:var(--sage)}.level-card.l3{background:var(--plum)}.level-number{display:inline-grid;place-items:center;width:48px;height:48px;border-radius:15px;background:#fff;font-weight:900;font-size:22px}.level-card h2{font-size:28px;margin:18px 0 5px}.level-card h3{font-size:18px;margin:0 0 14px;color:var(--blue-dark)}.level-card p{font-size:16px;line-height:1.5;margin:0;color:#405764}.notice{margin-top:22px;color:var(--muted);font-size:14px}.workbook{min-height:100vh}.topbar{position:sticky;top:0;z-index:20;display:flex;align-items:center;justify-content:space-between;gap:12px;background:rgba(247,243,236,.94);backdrop-filter:blur(12px);padding:12px 0}.topbar-left,.page-nav,.tools{display:flex;align-items:center;gap:8px;flex-wrap:wrap}.btn,.tool{min-height:44px;border:1px solid var(--line);border-radius:14px;background:#fff;padding:9px 14px;font-weight:800;cursor:pointer}.btn:hover,.tool:hover,.btn:focus-visible,.tool:focus-visible{border-color:var(--blue);outline:3px solid rgba(23,104,136,.14)}.tool.active{background:var(--blue);color:#fff;border-color:var(--blue)}.btn.primary{background:var(--blue);color:#fff;border-color:var(--blue)}.btn:disabled{opacity:.4;cursor:not-allowed}.viewer-layout{display:grid;grid-template-columns:220px minmax(0,1fr);gap:20px}.sidebar{background:rgba(255,253,249,.9);border:1px solid var(--line);border-radius:20px;padding:12px;max-height:calc(100vh - 92px);overflow:auto;position:sticky;top:80px}.sidebar h2{font-size:17px;margin:6px 6px 12px}.thumb{display:grid;grid-template-columns:58px 1fr;align-items:center;gap:10px;width:100%;border:1px solid transparent;border-radius:13px;background:transparent;padding:7px;text-align:left;cursor:pointer}.thumb img{display:block;width:58px;height:78px;object-fit:cover;object-position:top;border-radius:7px;background:#fff;border:1px solid var(--line)}.thumb span{font-size:13px;font-weight:800}.thumb.active{background:var(--sky);border-color:#9bc5d6}.stage-wrap{min-width:0}.activity-meta{display:flex;align-items:flex-start;justify-content:space-between;gap:20px;margin:10px 0 14px}.activity-meta h1{font-size:clamp(24px,4vw,38px);margin:0}.activity-meta p{margin:5px 0 0;color:var(--muted)}.tools{background:#fff;border:1px solid var(--line);border-radius:18px;padding:10px;margin-bottom:14px}.tool svg,.btn svg,.brand svg{width:20px;height:20px;vertical-align:middle}.page-frame{position:relative;margin:auto;width:min(100%,900px);background:#fff;border-radius:20px;box-shadow:var(--shadow);overflow:hidden;touch-action:none}.page-frame img{display:block;width:100%;height:auto;user-select:none;-webkit-user-drag:none}.annotation-layer{position:absolute;inset:0;width:100%;height:100%;touch-action:none}.help{max-width:900px;margin:14px auto 30px;padding:16px 18px;border-radius:16px;background:#fff8e8;border:1px solid #efdba7;color:#5e512f}.help strong{display:block;margin-bottom:4px}.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}@media(max-width:900px){.level-grid{grid-template-columns:1fr}.level-card{min-height:0}.viewer-layout{grid-template-columns:1fr}.sidebar{position:static;display:flex;gap:6px;max-height:none;overflow:auto}.sidebar h2{display:none}.thumb{min-width:78px;display:block;text-align:center}.thumb span{display:block;margin-top:4px}.activity-meta{display:block}.shell{padding:12px}.hero{border-radius:24px}}@media(prefers-reduced-motion:reduce){*{scroll-behavior:auto!important;transition:none!important}}@media print{.topbar,.sidebar,.tools,.help{display:none!important}.viewer-layout{display:block}.page-frame{box-shadow:none;width:100%}.shell{padding:0}}
.empty-place-cue{width:78px;height:78px;object-fit:contain;display:block;margin:0 auto 8px}.visual-board-title{display:flex!important;align-items:center;justify-content:center;gap:14px;flex-wrap:wrap}.visual-board-title>img{width:88px;height:88px;object-fit:contain;border-radius:18px;background:#fff}.visual-board-title>span{font-size:2rem;color:var(--blue)}.category-visual-title{display:flex;align-items:center;justify-content:center;gap:10px;margin-bottom:12px}.category-visual-title .visual-pictogram{width:76px;height:76px}.category-visual-title h3{margin:0}.story-scene-crop{display:block;width:100%;aspect-ratio:1.9;overflow:hidden;border-radius:16px;background:#fff}.story-scene-crop img{display:block;width:100%;height:auto;object-fit:contain;object-position:center top}.story-scene-card>img{display:none}.lens-slot .story-scene-crop{max-width:200px;margin:0 auto 8px}
.participation-option>img{width:64px;height:64px;object-fit:contain;flex:0 0 auto}.finished-label>img{width:44px;height:44px;object-fit:contain}
.l1-settings button{display:flex;align-items:center;justify-content:center;gap:8px}.l1-settings button>img{width:42px;height:42px;object-fit:contain}
.l1-task-picture{display:grid;grid-template-columns:minmax(90px,150px) 34px minmax(90px,150px) 34px minmax(90px,150px) auto;align-items:center;justify-content:center;gap:12px;margin:18px auto 24px;padding:16px 20px;max-width:780px;border:3px solid #8db2df;border-radius:24px;background:#fffdf8;box-shadow:0 8px 20px rgba(18,61,122,.08)}.task-picture-sample,.task-picture-action,.task-picture-result{position:relative;display:flex;align-items:center;justify-content:center;min-height:112px;padding:9px;border:3px solid #d5e1f1;border-radius:18px;background:#fff}.l1-task-picture img{display:block;max-width:100%;width:104px;height:94px;object-fit:contain}.task-picture-action{border-color:#ff8cba;background:#fff2f7}.task-picture-result{border-style:dashed;border-color:#5a95d6;background:#f2f7ff}.task-picture-result.selected-result{border-style:solid;border-width:5px;border-color:#174f8d}.task-picture-result.selected-result i{position:absolute;right:7px;top:5px;width:34px;height:18px;border-left:7px solid #25845a;border-bottom:7px solid #25845a;transform:rotate(-45deg)}.task-picture-arrow{font-size:2.3rem;font-weight:900;color:#174f8d;text-align:center}.l1-task-picture>.audio-button{margin-left:6px}@media(max-width:720px){.l1-task-picture{grid-template-columns:1fr 24px 1fr 24px 1fr;padding:12px 8px;gap:5px}.l1-task-picture>.audio-button{grid-column:1/-1;justify-self:center}.l1-task-picture img{width:72px;height:68px}.task-picture-sample,.task-picture-action,.task-picture-result{min-height:88px}.task-picture-arrow{font-size:1.5rem}}

/* Nivel 3 · Actividad 7 — estrategias para aprender, sin etiquetas de estilos */
.l3-a7 .l3-hero>img{width:clamp(180px,25vw,300px);height:210px;object-fit:contain;object-position:center;background:#fff;border-radius:22px;padding:8px}
.l3-a7-options{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:12px;margin:18px 0}
.l3-a7-options .l3-recall-card{min-width:0;position:relative}
.l3-a7-options .l3-recall-main{min-height:126px;padding:12px 10px;display:flex;flex-direction:column;justify-content:center;gap:8px;text-align:center}
.l3-a7-options .l3-recall-main img{width:62px;height:62px;object-fit:contain}
.l3-a7-options .l3-recall-main span:last-child{font-size:1rem;line-height:1.2}
.l3-a7-options .audio-button{position:absolute;right:6px;top:6px;transform:scale(.76)}
.l3-a7-text-mark{display:grid;place-items:center;width:62px;height:62px;border-radius:50%;background:#eef4f8;color:#567080;font-size:2rem;font-weight:900}
.l3-a7-idea-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:12px;margin:18px 0}
.l3-a7-idea-grid .l3-choice-card{position:relative;min-width:0}
.l3-a7-idea-grid .l3-choice-main{min-height:138px;padding:12px 9px}
.l3-a7-idea-grid .l3-choice-main img{width:70px;height:70px;object-fit:contain}
.l3-a7-idea-grid .audio-button{position:absolute;right:5px;top:5px;transform:scale(.74)}
.l3-a7-choose-mode{padding:18px;border:2px dashed #b9cce1;border-radius:16px;background:#f8fbff;text-align:center;color:#536b80;font-weight:800}
@media(max-width:850px){.l3-a7-options,.l3-a7-idea-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.l3-a7 .l3-hero>img{width:180px;height:165px}}
@media(max-width:520px){.l3-a7-options,.l3-a7-idea-grid{grid-template-columns:1fr 1fr;gap:8px}.l3-a7-options .l3-recall-main{min-height:112px}.l3-a7-options .l3-recall-main img{width:52px;height:52px}}

/* Nivel 3 · Actividad 8 — escena compartida y texto protagonista */
.l3-a8 .l3-hero{grid-template-columns:minmax(330px,1.25fr) minmax(280px,.75fr) auto}.l3-a8 .l3-hero>img{width:100%;height:clamp(230px,29vw,340px);object-fit:contain;object-position:center;background:#fff;border-radius:24px;padding:8px}.l3-a8-options{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px;margin:18px 0}.l3-a8-options .l3-recall-card{position:relative}.l3-a8-options .l3-recall-main{min-height:84px;display:grid;grid-template-columns:40px 1fr;align-items:center;text-align:left;padding:14px 46px 14px 16px}.l3-a8-selector{display:grid;place-items:center;width:30px;height:30px;border:2px solid #7599bd;border-radius:8px;background:#fff;color:#176888;font-weight:900}.l3-a8-options .selected .l3-a8-selector{background:#dceef4}.l3-a8-options .audio-button{position:absolute;right:7px;top:50%;transform:translateY(-50%) scale(.75)}.l3-a8-caa-note{margin:8px 0 18px;padding:12px 16px;border-left:4px solid #56a2b8;background:#eef8fa;border-radius:10px;color:#405d69}.l3-a8-image-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:12px;margin:16px 0}.l3-a8-image-grid .l3-choice-card{position:relative}.l3-a8-image-grid .l3-choice-main{min-height:132px;padding:10px}.l3-a8-image-grid .l3-choice-main img{width:68px;height:68px;object-fit:contain}.l3-a8-image-grid .audio-button{position:absolute;right:4px;top:4px;transform:scale(.72)}
@media(max-width:850px){.l3-a8 .l3-hero{grid-template-columns:1fr}.l3-a8 .l3-hero>img{height:260px}.l3-a8-image-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media(max-width:560px){.l3-a8-options{grid-template-columns:1fr}.l3-a8 .l3-hero>img{height:210px}.l3-a8-image-grid{gap:8px}}

/* Nivel 3 · Actividad 9 — intereses, comparación neutral y respuesta personal */
.l3-a9 .l3-hero{grid-template-columns:minmax(350px,1.15fr) minmax(280px,.85fr) auto}.l3-a9 .l3-hero>img{width:100%;height:clamp(220px,28vw,330px);object-fit:contain;object-position:center;background:#f2f9ff;border-radius:24px;padding:6px}.l3-a9-image-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px;margin:16px 0}.l3-a9-image-grid .l3-choice-card{position:relative}.l3-a9-image-grid .l3-choice-main{min-height:145px;padding:10px}.l3-a9-image-grid .l3-choice-main img{width:76px;height:76px;object-fit:contain}.l3-a9-image-grid .audio-button{position:absolute;right:5px;top:5px;transform:scale(.72)}.l3-a9-compare{display:grid;grid-template-columns:1fr 1fr;gap:14px}.l3-a9-compare label{font-weight:900;color:#294a62}.l3-a9-compare textarea{display:block;width:100%;min-height:120px;margin-top:8px;border:2px solid #b9cce1;border-radius:15px;padding:12px;background:#fff;font:inherit}.l3-a9-phase h5{font-size:1.05rem;margin:22px 0 4px}
@media(max-width:850px){.l3-a9 .l3-hero{grid-template-columns:1fr}.l3-a9 .l3-hero>img{height:250px}.l3-a9-image-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media(max-width:560px){.l3-a9-compare{grid-template-columns:1fr}.l3-a9 .l3-hero>img{height:200px}}
.l3-a10 .l3-hero{grid-template-columns:minmax(420px,1.35fr) minmax(280px,.65fr) auto}.l3-a10 .l3-hero>img{width:100%;height:clamp(220px,27vw,320px);object-fit:contain;object-position:center;background:#edf7ee;border-radius:24px;padding:4px}.l3-a10-options{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}.l3-a10-options .l3-recall-card{position:relative}.l3-a10-options .l3-recall-main{min-height:76px;display:grid;grid-template-columns:42px 1fr;align-items:center;text-align:left;padding:12px 48px 12px 15px}.l3-a10-options .audio-button{position:absolute;right:6px;top:50%;transform:translateY(-50%) scale(.72)}.l3-a10-context{margin:14px 0;padding:11px 14px;border-left:4px solid #78a793;background:#f1f8f3;border-radius:10px;color:#3e6253}.l3-a10-image-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px;margin:16px 0}.l3-a10-image-grid .l3-choice-card{position:relative}.l3-a10-image-grid .l3-choice-main{min-height:142px;padding:10px}.l3-a10-image-grid .l3-choice-main img{width:100%;height:82px;object-fit:contain}.l3-a10-image-grid .audio-button{position:absolute;right:5px;top:5px;transform:scale(.72)}
@media(max-width:850px){.l3-a10 .l3-hero{grid-template-columns:1fr}.l3-a10 .l3-hero>img{height:250px}.l3-a10-image-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media(max-width:560px){.l3-a10-options{grid-template-columns:1fr}.l3-a10 .l3-hero>img{height:190px}}
.l3-a11 .l3-hero{grid-template-columns:minmax(420px,1.4fr) minmax(280px,.6fr) auto}.l3-a11 .l3-hero>img{width:100%;height:clamp(220px,27vw,320px);object-fit:contain;object-position:center;background:#fffaf0;border-radius:24px;padding:4px}.l3-a11-zones,.l3-a11-show{display:grid;grid-template-columns:1fr 1fr;gap:24px;margin-top:20px}.l3-a11-zones>section,.l3-a11-show>section{padding:22px;border:3px solid #8fb4df;border-radius:22px;background:#f4f9ff}.l3-a11-zones>section:nth-child(2),.l3-a11-show>section:nth-child(2){border-color:#d6a0bc;background:#fff6fa}.l3-a11-zones h4,.l3-a11-show h4{margin:0 0 14px;text-align:center;font-size:1.35rem;color:#123b83}.l3-a11-zones>section:nth-child(2) h4,.l3-a11-show>section:nth-child(2) h4{color:#7b315d}.l3-a11-zones .l3-recall-card{margin:10px 0}.l3-a11-note{margin:18px 0 4px;padding:14px 18px;border-left:5px solid #769ccc;background:#f7f9fc;color:#344b6b;border-radius:10px}.l3-a11-bank{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:14px;margin-top:16px}.l3-a11-bank .l3-choice-card{position:relative}.l3-a11-bank .l3-choice-main img{width:88px;height:88px;object-fit:contain;padding:7px}.l3-a11-bank .audio-button{position:absolute;right:5px;top:5px;transform:scale(.72)}.l3-a11-show .l3-a1-image-bank,.l3-a11-show .l3-a11-bank{grid-template-columns:repeat(2,minmax(0,1fr))}
@media(max-width:900px){.l3-a11 .l3-hero{grid-template-columns:1fr}.l3-a11 .l3-hero>img{height:auto;max-height:230px}.l3-a11-zones,.l3-a11-show{grid-template-columns:1fr}.l3-a11-bank{grid-template-columns:repeat(2,minmax(0,1fr))}}
/* Nivel 3 · Actividad 12 — una situación completa y dos perspectivas */
.l3-a12 .l3-hero{grid-template-columns:minmax(480px,1.5fr) minmax(270px,.5fr) auto}.l3-a12 .l3-hero>img{width:100%;height:clamp(220px,25vw,310px);object-fit:contain;object-position:center;background:#f7fbf4;border-radius:24px;padding:4px}.l3-a12-options{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px;margin:18px 0}.l3-a12-options .l3-recall-card{position:relative}.l3-a12-options .l3-recall-main{min-height:88px;display:grid;grid-template-columns:40px 1fr;align-items:center;text-align:left;padding:14px 48px 14px 16px}.l3-a12-options .audio-button{position:absolute;right:6px;top:50%;transform:translateY(-50%) scale(.72)}.l3-a12-bank{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:12px;margin:16px 0}.l3-a12-bank .l3-choice-card{position:relative}.l3-a12-bank .l3-choice-main{min-height:140px;padding:10px}.l3-a12-bank .l3-choice-main img{width:76px;height:76px;object-fit:contain}.l3-a12-bank .audio-button{position:absolute;right:4px;top:4px;transform:scale(.7)}.l3-a12-show{display:grid;grid-template-columns:1fr 1fr;gap:16px;margin-top:18px}.l3-a12-show>section{padding:18px;border:3px solid #8fb4df;border-radius:22px;background:#f5f9ff}.l3-a12-show>section.situation{grid-column:1/-1;border-color:#7fa88d;background:#f3faf5}.l3-a12-show>section:nth-child(3){border-color:#d6a0bc;background:#fff6fa}.l3-a12-show h4{margin:0 0 12px;text-align:center;font-size:1.28rem}.l3-a12-show .l3-a12-bank{grid-template-columns:repeat(3,minmax(0,1fr))}
@media(max-width:900px){.l3-a12 .l3-hero{grid-template-columns:1fr}.l3-a12 .l3-hero>img{height:auto;max-height:260px}.l3-a12-bank{grid-template-columns:repeat(2,minmax(0,1fr))}.l3-a12-show{grid-template-columns:1fr}.l3-a12-show>section.situation{grid-column:auto}.l3-a12-show .l3-a12-bank{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media(max-width:560px){.l3-a12-options{grid-template-columns:1fr}.l3-a12 .l3-hero>img{max-height:210px}}
.l3-a13 .l3-hero{grid-template-columns:minmax(430px,1.3fr) minmax(300px,.7fr) auto}.l3-a13 .l3-hero>img{width:100%;height:clamp(190px,22vw,280px);object-fit:contain;object-position:center;background:#f4faff;border-radius:24px;padding:6px}.l3-a13-options{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px;margin:18px 0}.l3-a13-options .l3-recall-card{position:relative}.l3-a13-options .l3-recall-main{min-height:92px;display:grid;grid-template-columns:40px 1fr;align-items:center;text-align:left;padding:14px 48px 14px 16px;font-size:1.05rem;line-height:1.35}.l3-a13-options .audio-button{position:absolute;right:6px;top:50%;transform:translateY(-50%) scale(.7)}.l3-a13-context,.l3-a13-words{padding:12px 16px;border-radius:16px;background:#f3f7fc;color:#344b6b}.l3-a13-words{background:#f5faf5;border-left:5px solid #5fa47c}.l3-a13-bank{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:12px;margin:16px 0}.l3-a13-bank .l3-choice-card{position:relative}.l3-a13-bank .l3-choice-main{min-height:138px;padding:10px}.l3-a13-bank .l3-choice-main img{width:74px;height:74px;object-fit:contain}.l3-a13-bank .audio-button{position:absolute;right:4px;top:4px;transform:scale(.68)}.l3-a13-show{display:grid;grid-template-columns:1fr 1fr;gap:16px;margin-top:18px}.l3-a13-show>section{padding:18px;border:3px solid #8fb4df;border-radius:22px;background:#f5f9ff}.l3-a13-show>section+section{border-color:#74aa86;background:#f4fbf6}.l3-a13-show h4{margin:0 0 12px;text-align:center;font-size:1.3rem}
@media(max-width:900px){.l3-a13 .l3-hero{grid-template-columns:1fr}.l3-a13 .l3-hero>img{height:auto;max-height:250px}.l3-a13-bank{grid-template-columns:repeat(2,minmax(0,1fr))}.l3-a13-show{grid-template-columns:1fr}}
@media(max-width:560px){.l3-a13-options{grid-template-columns:1fr}.l3-a13-bank{grid-template-columns:1fr 1fr}.l3-a13 .l3-hero>img{max-height:200px}}
/* Paridad ES/EU: el texto puede crecer sin recortes ni reducción de fuente */
.btn,.tool,.level-card,.thumb,.activity-menu-dialog button,.extra-card{white-space:normal;overflow-wrap:anywhere;line-height:1.3}.level-card,.extra-card{height:auto}.activity-meta h1,.sidebar .thumb span{overflow-wrap:anywhere}.hero-actions{align-items:stretch}.hero-actions .btn{display:inline-flex;align-items:center;justify-content:center;text-align:center}