.learning-section{max-width:1430px;margin:auto;padding:46px max(4.7vw,22px) 30px;scroll-margin-top:20px}
.learning-head{display:flex;justify-content:space-between;align-items:end;gap:28px;margin-bottom:25px}
.learning-head h1{font-size:clamp(36px,4.7vw,65px);line-height:1.08;letter-spacing:-.055em;margin:15px 0}
.learning-head p{font-size:17px;line-height:1.6;color:#bac5d8;max-width:650px;margin-bottom:0}
.course-level-label{display:grid;gap:8px;font-size:14px;color:#c6d1e5;min-width:235px}
.course-level-label select,.lesson-topic-label select{font:inherit;border:1px solid #62708b;border-radius:9px;padding:12px;color:#f7f9ff;background:#1d2840;max-width:100%}
.learning-grid{display:grid;grid-template-columns:minmax(0,1.35fr) minmax(0,1fr);gap:18px}
.next-lesson-card,.review-due-card{padding:27px;border:1px solid #40516b;border-radius:16px;background:#1b2740;display:flex;flex-direction:column;align-items:start}
.next-lesson-card{border-top:3px solid #c9fa55}.review-due-card{background:#242641;border-top:3px solid #aa94f4}
.learning-grid h2{font-size:27px;line-height:1.2;letter-spacing:-.03em;margin:13px 0 10px}
.learning-grid p{font-size:16px;line-height:1.6;color:#bec9dc}.learning-grid .button{margin-top:auto}
.learning-grid .button-outline{background:transparent;border-color:#a999dd;color:#f4f0ff}.learning-grid button:disabled{opacity:.5}
.review-due-card h2 strong{color:#c9fa55}.review-due-card small{font-size:12px;color:#b8c2d5;line-height:1.6;margin-top:14px}
.course-progress{display:grid;gap:8px;width:100%;margin:0 0 20px;font-size:13px;color:#c2cedf}
.course-progress progress{width:100%;height:7px;border:0;border-radius:8px;overflow:hidden;accent-color:#c9fa55;background:#3c4b64}
.course-progress progress::-webkit-progress-bar{background:#3c4b64}.course-progress progress::-webkit-progress-value{background:#c9fa55}.course-progress progress::-moz-progress-bar{background:#c9fa55}
.route-details{margin-top:18px;border:1px solid #43516a;border-radius:10px;padding:16px 18px}.route-details summary{font-size:15px;cursor:pointer;font-weight:650;color:#d8e2f1}.route-details>p{font-size:13px;line-height:1.6;color:#b9c5d7;margin:15px 0 0}
.course-path{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:8px;margin-top:15px}.route-lesson{border:1px solid #42506a;background:#17233a;color:#ced8e9;border-radius:8px;padding:12px 14px;text-align:left;font-size:14px;line-height:1.4}.route-lesson:hover{border-color:#c9fa55}.route-lesson.is-next{border-color:#c9fa55;color:#d9ff94}.route-lesson.is-done{color:#a8dec5}
.layout{padding-top:35px}.game-column>h2{font-size:clamp(36px,4.5vw,58px);letter-spacing:-.06em;margin:22px 0 16px;line-height:1.08}
.lesson-goal{border-left:3px solid #694ad2;padding-left:13px;font-size:16px;line-height:1.6;color:#49378b;font-weight:650}
.lesson-subheading{font-size:19px;line-height:1.3;letter-spacing:-.025em;margin:28px 0 15px}
.lesson-steps{list-style:none;padding:0;margin:0;display:grid;gap:12px}.lesson-steps li{display:flex;align-items:start;gap:12px}.step-number{font-size:12px;font-weight:800;background:#e9e3fb;color:#5439ad;padding:7px;border-radius:7px;flex:none}.lesson-steps p{font-size:16px;line-height:1.65;color:#425169;margin:2px 0 0}
.examples-heading{display:flex;align-items:center;justify-content:space-between;gap:15px;margin-top:12px}.examples-heading label{display:flex;align-items:center;gap:7px;font-size:13px;color:#58647a}.examples-heading select{font:inherit;padding:7px;border:1px solid #b9c4d6;border-radius:6px;color:#283650;background:#fff}
.audio-status{font-size:12px!important;line-height:1.5;color:#677389;margin:0 0 13px}.lesson-examples{margin-top:14px}.listen-button{justify-self:start;background:#f0ecff;color:#5237aa;border:1px solid #c8bbee;padding:7px 11px;border-radius:7px;font-size:13px;font-weight:650;margin-top:7px}
.mistake-box{background:#fff;border:1px solid #dce2ee;border-radius:10px;padding:19px;margin-top:22px}.mistake-box h3,.production-box h3,.coach-result h3{font-size:18px;line-height:1.4;margin:0 0 13px}.mistake-box p{font-size:15px;line-height:1.6;color:#526077;margin:10px 0}.mistake-box span{display:block;font-size:12px;font-weight:600;margin-bottom:4px}.mistake-wrong strong{color:#a03a4c}.mistake-right strong{color:#246544}
.production-box{border:1px solid #d4dce9;border-radius:11px;background:#eef2f8;padding:20px;margin:25px 0}.production-box>p{font-size:16px;line-height:1.65;color:#45536a}.production-box label{font-size:14px;display:block;font-weight:650;margin:14px 0 7px}.production-box textarea{width:100%;resize:vertical;min-height:100px;font:16px/1.6 system-ui,sans-serif;padding:12px;border:1px solid #aab9cc;border-radius:8px;background:#fff;color:#202d46}.production-box details{margin:16px 0}.production-box summary{font-size:14px;font-weight:700;color:#583bb5;cursor:pointer}.production-box details p{font-size:14px;line-height:1.7;color:#44536a;margin-top:12px}.production-box #productionModel{white-space:pre-wrap;background:#fff;padding:14px;border-radius:7px;color:#283d60;font-size:16px}.production-box small{display:block;color:#626f82;font-size:12px;line-height:1.6}
.coach-result{margin:20px 0;padding:18px;border-radius:10px;background:#eeeaf9;border:1px solid #d8cef0}.coach-result p{font-size:15px;line-height:1.6;color:#4c5970}.coach-link{display:block;border:0;background:transparent;color:#5135a9;text-align:left;font-weight:700;font-size:14px;line-height:1.5;padding:7px 0;text-decoration:underline;text-underline-offset:3px}.feedback-correct{font-weight:750;color:#283d52}
.lesson-topic-label{display:grid;gap:8px;color:#c7d3e5;font-size:13px;font-weight:700}.lesson-topic-label select{min-height:45px;font-weight:400}
textarea:focus-visible,select:focus-visible,summary:focus-visible{outline:3px solid #8264dd;outline-offset:3px}.listen-button:focus-visible,.coach-link:focus-visible{outline:3px solid #8264dd;outline-offset:3px}
.panel-tag{max-width:80%;letter-spacing:.05em;line-height:1.3}.panel-top{height:auto;min-height:64px;padding-top:13px;padding-bottom:13px;gap:14px}.panel-count{white-space:nowrap}
@media(max-width:800px){.learning-head{align-items:start;flex-direction:column}.learning-grid{grid-template-columns:1fr 1fr}.learning-grid h2{font-size:23px}.next-lesson-card,.review-due-card{padding:20px}.course-level-label{width:100%}}
@media(max-width:600px){.learning-section{padding-top:30px}.learning-grid,.course-path{grid-template-columns:1fr}.learning-head h1{font-size:39px}.learning-head p{font-size:16px}.next-lesson-card,.review-due-card{padding:21px}.learning-grid .button{width:100%}.examples-heading{align-items:start;flex-direction:column;gap:0}.examples-heading .lesson-subheading{margin-bottom:10px}.examples-heading label{margin-bottom:9px}.lesson-topic-label{width:100%}.production-box,.mistake-box{padding:16px}.layout{padding-top:22px}.lesson-steps p{font-size:16px}.course-level-label select{width:100%}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*{transition:none!important}}
.lesson-screen [hidden]{display:none!important}
.lesson-extra{margin:22px 0;border:1px solid #dcd6ee;border-radius:14px;background:#f8f6ff;overflow:hidden;color:#273148}
.lesson-extra summary{display:flex;align-items:center;min-height:54px;padding:13px 17px;color:#49378b;font-size:15px;line-height:1.4;cursor:pointer}
.lesson-extra summary::marker{color:#6950bc}
.lesson-extra[open] summary{border-bottom:1px solid #e2ddf1}
.lesson-extra .lesson-intro{display:none}
.lesson-deep-dive{display:grid;gap:12px;padding:16px}
.depth-section{background:#fff;border:1px solid #e4e0ee;border-radius:12px;padding:16px 18px}
.depth-section h4{margin:0 0 8px;font-size:16px;line-height:1.35;color:#342664}
.depth-section p{margin:0;color:#39475f;font-size:15px;line-height:1.65;overflow-wrap:anywhere}
.depth-section p+p{margin-top:12px;padding-top:12px;border-top:1px solid #eeeaf5}
@media(max-width:600px){.lesson-extra{margin:19px 0}.lesson-extra summary{padding:13px 14px}.lesson-deep-dive{padding:12px;gap:10px}.depth-section{padding:14px}.depth-section p{font-size:15px;line-height:1.6}}
.lesson-screen{max-width:860px;margin-inline:auto;scroll-margin-top:14px}
.lesson-screen h2{margin-bottom:15px}
.lesson-nav{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:7px;padding:5px;margin:0 0 22px;border-radius:12px;background:#edf0f7}
.lesson-nav-button{min-height:44px;border:0;border-radius:8px;background:transparent;color:#4b5b70;font:700 14px/1.25 system-ui,sans-serif;padding:8px 5px;cursor:pointer}
.lesson-nav-button.is-active{color:#3d2993;background:#fff;box-shadow:0 2px 7px #252e471a}
.lesson-nav-button:focus-visible,.lesson-next:focus-visible,.example-pager button:focus-visible,.production-box button:focus-visible{outline:3px solid #7455d7;outline-offset:2px}
.lesson-stage{min-width:0}.lesson-stage .lesson-subheading:first-child{margin-top:0}
.lesson-goal{margin:0 0 18px;background:#f2efff;border-radius:7px;padding:12px 14px;border-left:3px solid #694ad2;line-height:1.5}
.lesson-steps{gap:8px}.lesson-steps li{background:#f7f8fb;border:1px solid #e6e9ef;border-radius:10px;padding:11px 12px}.lesson-steps p{font-size:15px;line-height:1.5}
.lesson-extra{margin:16px 0;color:#4b398f}.lesson-extra summary{cursor:pointer;font-size:14px;font-weight:700}.lesson-extra .lesson-intro{margin:12px 0;font-size:15px;line-height:1.6}
.lesson-tip{margin:14px 0}.mistake-box{margin-top:16px}.mistake-box p{margin:8px 0}.lesson-next{margin-top:10px;max-width:100%}
.lesson-examples{margin:12px 0}.lesson-example{padding:20px;gap:10px;min-height:170px}.lesson-example strong{font-size:19px;line-height:1.35}.lesson-example>span{font-size:16px}.lesson-example small{font-size:14px}.audio-choices{display:flex;gap:8px;flex-wrap:wrap;margin-top:9px}.listen-button{font-size:14px;margin:0;min-height:44px;padding:9px 13px;cursor:pointer}
.example-pager{display:flex;align-items:center;justify-content:space-between;gap:10px;margin:12px 0 22px}.example-pager span{color:#526075;font-size:14px;font-weight:700;white-space:nowrap}.example-pager button{padding:9px 12px;min-height:44px}.example-pager button:disabled{opacity:.42;cursor:not-allowed}
.production-box{margin:0 0 20px;padding:20px}.production-box>p{margin:5px 0 13px}.production-box textarea{margin-bottom:13px}.production-box button{margin:0 0 14px;max-width:100%}.production-box small{margin-top:5px}
.writing-actions{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:10px}.writing-actions button{width:100%;white-space:normal;line-height:1.3}
.production-feedback{background:#fff;border:1px solid #d9e2ed;border-radius:9px;padding:14px 16px;margin:2px 0 16px}.production-feedback strong{font-size:16px;color:#273653}.production-feedback p{font-size:14px;line-height:1.5;margin:9px 0 0}.feedback-positive{color:#23623e}.feedback-attention{color:#754817}.feedback-note{color:#3c4b68}.feedback-caveat{color:#647189;font-size:13px!important}
.production-comparison{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:10px;margin:0 0 17px}.production-comparison>div{background:#fff;border:1px solid #dbe1ea;border-radius:9px;padding:14px;min-width:0}.production-comparison strong{font-size:13px;color:#5841a1}.production-comparison p{font-size:15px;line-height:1.5;white-space:pre-wrap;overflow-wrap:anywhere;margin:8px 0 0}.production-comparison>p{grid-column:1/-1;margin:0;background:#e9e4fb;border-radius:8px;padding:12px;font-size:14px;line-height:1.5;color:#493780}
@media(max-width:600px){.lesson-screen{padding:17px 15px 26px}.lesson-screen .back-link{margin-bottom:13px}.lesson-screen h2{font-size:clamp(25px,7vw,33px);line-height:1.17;margin:5px 0 14px}.lesson-nav{position:sticky;top:0;z-index:2;margin-inline:-6px}.lesson-nav-button{font-size:13px}.lesson-screen .lesson-subheading{margin:18px 0 10px}.lesson-steps li{padding:10px}.lesson-steps p{font-size:15px;line-height:1.45}.lesson-example{padding:16px;min-height:0}.production-box{padding:15px}.production-comparison{grid-template-columns:1fr}.writing-actions{grid-template-columns:1fr;gap:0}.example-pager button{font-size:13px;padding:8px}.lesson-next,.production-box button{width:100%}}

/* Estudio en móvil: contraste alto sobre superficies pastel claras. */
.learning-head p,.learning-grid p,.review-due-card small,.course-progress,.route-details>p{color:var(--muted)}
.course-level-label,.lesson-topic-label{color:var(--ink)}
.course-level-label select,.lesson-topic-label select{background:var(--white);color:var(--ink);border-color:#a9c9e3}
.next-lesson-card,.review-due-card{background:var(--white);border-color:#d9e4ed;box-shadow:0 8px 28px #3455770d}
.next-lesson-card{border-top-color:var(--blue-ink)}.review-due-card{border-top-color:var(--red-ink)}
.review-due-card h2 strong{color:var(--blue-ink)}
.learning-grid .button-outline{background:var(--red-soft);border-color:#deb3bb;color:var(--red-ink)}
.course-progress progress{background:var(--blue-soft);accent-color:var(--blue-ink)}
.course-progress progress::-webkit-progress-bar{background:var(--blue-soft)}
.course-progress progress::-webkit-progress-value{background:var(--blue-ink)}
.course-progress progress::-moz-progress-bar{background:var(--blue-ink)}
.route-details{background:var(--white);border-color:#d9e4ed}.route-details summary{color:var(--blue-ink)}
.route-lesson{background:var(--blue-soft);border-color:#c7ddee;color:var(--ink)}
.route-lesson:hover,.route-lesson.is-next{border-color:var(--blue-ink);color:var(--blue-ink)}
.route-lesson.is-done{color:var(--green-ink);background:var(--green)}
.lesson-goal{color:var(--blue-ink);background:var(--blue-soft);border-left-color:var(--blue-ink)}
.lesson-steps li{background:#fff;border-color:#d9e4ed}.step-number{background:var(--red);color:var(--red-ink)}
.lesson-steps p,.production-box>p,.mistake-box p,.production-feedback p,.coach-result p{color:var(--muted)}
.lesson-nav{background:var(--blue-soft)}.lesson-nav-button{color:var(--muted)}
.lesson-nav-button.is-active{color:var(--blue-ink);background:var(--white)}
.lesson-extra{border-color:#c7ddee;background:var(--blue-soft);color:var(--ink)}
.lesson-extra summary{color:var(--blue-ink);font-size:15px;padding:16px 18px;min-height:54px}
.lesson-extra[open] summary{border-bottom-color:#c7ddee}
.lesson-deep-dive{padding:14px;gap:12px}
.depth-section{background:var(--white);border-color:#d9e4ed;padding:18px 20px}
.depth-section h4{color:var(--blue-ink);font-size:17px;margin:0 0 9px}
.depth-section p{color:var(--ink);font-size:16px;line-height:1.65}
.depth-section p+p{border-top-color:#dfebf4}
.depth-exception{background:var(--red-soft);border-color:#ebc6ca}
.depth-exception h4{color:var(--red-ink)}
.depth-practice{background:var(--blue-soft);border-color:#c7ddee}
.depth-comparison{display:grid;gap:10px}
.depth-case{padding:12px 14px;background:var(--paper);border:1px solid #d7e4ed;border-radius:10px}
.depth-case strong{display:block;color:var(--ink);font-size:16px;line-height:1.5}
.depth-translation{display:block;color:var(--blue-ink);font-size:14px;line-height:1.5;margin:5px 0}
.depth-case p{color:var(--muted);font-size:14px;line-height:1.55;margin:6px 0 0}
.mistake-box,.production-box,.production-feedback,.production-comparison>div{background:var(--white);border-color:#d9e4ed;color:var(--ink)}
.production-box textarea{border-color:#a9c9e3;color:var(--ink)}
.mistake-wrong strong,.feedback-attention{color:var(--red-ink)}
.mistake-right strong,.feedback-positive{color:var(--green-ink)}
.production-box details summary,.coach-link,.production-comparison strong{color:var(--blue-ink)}
.production-box small,.feedback-caveat,.feedback-note{color:var(--muted)}
.production-comparison>p,.coach-result{background:var(--blue-soft);border-color:#c7ddee;color:var(--ink)}
.listen-button{background:var(--blue-soft);border-color:#b7d2e8;color:var(--blue-ink)}
.lesson-nav-button:focus-visible,.lesson-next:focus-visible,.example-pager button:focus-visible,.production-box button:focus-visible,textarea:focus-visible,select:focus-visible,summary:focus-visible{outline-color:var(--blue-ink)}
@media(max-width:600px){.lesson-deep-dive{padding:10px;gap:9px}.depth-section{padding:15px}.depth-section p{font-size:16px;line-height:1.6}.depth-case{padding:11px}}
.next-lesson-card{background:var(--blue-soft);border-top:4px solid #93bce3}
.review-due-card{background:var(--red-soft);border-top:4px solid #dc9faa}
.learning-grid .button-outline{background:var(--red);border-color:#e4b5bd}
.lesson-nav{background:var(--blue);border:1px solid #bbd4ec}
.lesson-goal{background:var(--blue);border-left-color:var(--blue-ink)}
.lesson-extra{background:var(--blue);border-color:#b5d1eb}
.depth-section:first-child{background:var(--blue-soft);border-color:#c4dbef}
.depth-exception{background:var(--red-soft);border-color:#e6bec5}
.depth-practice{background:var(--blue-soft);border-color:#c4dbef}
.mistake-box{background:var(--red-soft);border-color:#e9c8cd}
.production-box{background:var(--blue-soft);border-color:#c4dbef}
.lesson-steps li:nth-child(odd){background:var(--blue-soft)}
.lesson-steps li:nth-child(even){background:var(--red-soft)}

.review-due-card{background:var(--amber-soft);border-top-color:#deb969}
.learning-grid .button-outline{background:var(--teal);border-color:#86c5be;color:var(--teal-ink)}
.step-number{background:var(--amber);color:var(--amber-ink)}
.lesson-steps li:nth-child(even){background:var(--teal-soft)}
.depth-practice{background:var(--teal-soft);border-color:#a9d8d1}
.production-box{background:var(--teal-soft);border-color:#a9d8d1}
.depth-exception{background:var(--amber-soft);border-color:#efd18c}
.depth-exception h4{color:var(--amber-ink)}

/* Las lecciones priorizan la lectura: texto oscuro y bloques de contenido claros. */
.next-lesson-card{background:#eaf1fb;border-top-color:var(--uk-blue)}
.review-due-card{background:var(--gold-soft);border-top-color:var(--gold)}
.learning-grid .button-outline{background:var(--gold-soft);border-color:#dec07e;color:var(--gold-ink)}
.lesson-nav{background:#e7eef9;border-color:#cdddf1}
.lesson-nav-button.is-active{color:var(--uk-blue)}
.lesson-goal{background:#eaf1fb;border-left-color:var(--uk-blue);color:var(--uk-blue)}
.lesson-extra{background:#f4f7fc;border-color:#d6e3f2}
.lesson-extra summary{color:var(--uk-blue)}
.depth-section,.depth-section:first-child{background:#fff;border-color:#dce6f2}
.depth-section h4{color:var(--uk-blue)}
.depth-exception{background:var(--gold-soft);border-color:#ecd49d}
.depth-exception h4{color:var(--gold-ink)}
.depth-practice,.production-box{background:#f3f7fd;border-color:#d6e4f3}
.lesson-steps li:nth-child(odd){background:#eef4fc}
.lesson-steps li:nth-child(even){background:#fff8e9}
.step-number{background:var(--gold);color:var(--gold-ink)}

.review-due-card{background:var(--uk-red-soft);border-top-color:var(--uk-red)}
.review-due-card h2 strong{color:var(--uk-red-ink)}
.learning-grid .review-due-card .button-outline{background:var(--uk-red);border-color:var(--uk-red);color:#fff}
.learning-grid .review-due-card .button-outline:hover:not(:disabled){background:var(--uk-red-hover);border-color:var(--uk-red-hover)}
.learning-grid .review-due-card .button-outline:disabled{background:#f2d6dc;border-color:#e8bbc4;color:#814b57;opacity:1}