:root {
  --navy-950:#051225; --navy-900:#07182e; --navy-800:#0c2543; --navy-700:#12395f;
  --blue:#1674cc; --blue-600:#0d63b7; --cyan:#33cad5; --amber:#f5b842; --amber-dark:#d99317;
  --mist:#eef4f9; --line:#d9e3ec; --ink:#07172b; --muted:#5d6d7e; --white:#fff;
  --success:#138c70; --danger:#b83242; --shadow:0 18px 50px rgba(5,18,37,.12);
  --radius:22px; --radius-sm:13px; --shell:min(1180px,calc(100% - 40px));
}

/* La portada usa <picture> para entregar WebP con respaldo JPG. */
.hero-visual>picture{display:block;width:100%;height:100%}
.hero-visual>picture>img{display:block;width:100%;height:555px;object-fit:cover;object-position:center}
@media(max-width:980px){.hero-visual>picture>img{height:430px}}
@media(max-width:620px){.hero-visual>picture>img{height:390px;min-height:390px}}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;color:var(--ink);font-family:Inter,ui-sans-serif,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;line-height:1.55;background:#fff}button,input,select,textarea{font:inherit}a{color:inherit}img{display:block;max-width:100%}button,a{-webkit-tap-highlight-color:transparent}.skip-link{position:fixed;z-index:9999;top:10px;left:10px;padding:10px 14px;background:#fff;color:#000;transform:translateY(-150%)}.skip-link:focus{transform:none}.shell{width:var(--shell);margin-inline:auto}.site-header{position:sticky;z-index:100;top:0;background:rgba(255,255,255,.94);border-bottom:1px solid rgba(217,227,236,.85);backdrop-filter:blur(14px)}.header-inner{min-height:76px;display:flex;align-items:center;justify-content:space-between;gap:24px}.brand{display:inline-flex;align-items:center;gap:11px;text-decoration:none}.brand-mark{display:grid;place-items:center;width:43px;height:43px;border-radius:13px;background:linear-gradient(135deg,var(--blue),var(--cyan));box-shadow:0 8px 24px rgba(22,116,204,.25);color:#fff;font-weight:900}.brand strong,.brand small{display:block}.brand strong{font-size:14px;letter-spacing:.03em}.brand small{color:var(--muted);font-size:11px;letter-spacing:.06em}.main-nav{display:flex;align-items:center;gap:22px}.main-nav>a:not(.button){font-weight:700;font-size:14px;text-decoration:none}.menu-toggle{display:none;border:1px solid var(--line);background:#fff;border-radius:11px;padding:10px 13px;font-weight:800}.button{display:inline-flex;justify-content:center;align-items:center;gap:8px;min-height:44px;padding:10px 18px;border:1px solid transparent;border-radius:11px;text-decoration:none;font-weight:850;cursor:pointer;transition:.2s ease}.button:hover{transform:translateY(-1px)}.button-primary{background:var(--blue);color:#fff}.button-primary:hover{background:var(--blue-600)}.button-accent{background:var(--amber);color:#171207}.button-accent:hover{background:#ffc95d}.button-ghost{border-color:var(--line);background:#fff;color:var(--ink)}.button-dark-ghost{border-color:rgba(255,255,255,.28);background:rgba(255,255,255,.06);color:#fff}.button-large{min-height:50px;padding-inline:22px}.button-block{width:100%}.text-button{border:0;background:none;color:var(--blue);font-weight:800;cursor:pointer}.hero{overflow:hidden;background:radial-gradient(circle at 82% 15%,rgba(51,202,213,.16),transparent 28%),linear-gradient(135deg,var(--navy-950),var(--navy-900) 60%,#0d3151);color:#fff}.hero-grid{min-height:690px;padding:70px 0 58px;display:grid;grid-template-columns:minmax(0,1fr) minmax(390px,.78fr);align-items:center;gap:65px}.eyebrow{margin:0 0 13px;color:var(--blue);font-size:12px;font-weight:900;letter-spacing:.17em;text-transform:uppercase}.hero .eyebrow,.section-navy .eyebrow,.section-gradient .eyebrow,.enrollment .eyebrow{color:var(--cyan)}h1,h2,h3,p{overflow-wrap:break-word}.hero h1{max-width:720px;margin:0;font-size:clamp(48px,6vw,77px);line-height:.98;letter-spacing:-.055em}.hero-lead{max-width:650px;margin:26px 0 0;color:#c1d0df;font-size:19px}.hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin:30px 0 20px}.check-list{list-style:none;margin:22px 0;padding:0}.check-list li{position:relative;padding-left:26px;margin:10px 0}.check-list li:before{content:"✓";position:absolute;left:0;color:var(--cyan);font-weight:900}.check-list-inline{display:flex;flex-wrap:wrap;gap:8px 24px}.fine-print{color:#92a6ba;font-size:12px}.fine-print.dark{color:var(--muted)}.hero-visual{position:relative;margin:0;min-height:555px;border-radius:26px;overflow:hidden;background:var(--navy-800);border:1px solid rgba(255,255,255,.18);box-shadow:0 35px 90px rgba(0,0,0,.35)}.hero-visual:after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,transparent 50%,rgba(5,18,37,.92))}.hero-visual>img{width:100%;height:555px;object-fit:cover;object-position:center}.hero-visual figcaption{position:absolute;z-index:2;left:24px;right:24px;bottom:22px}.hero-visual figcaption span,.hero-visual figcaption strong{display:block}.hero-visual figcaption strong{font-size:24px}.visual-kicker{color:var(--cyan);text-transform:uppercase;font-weight:900;font-size:11px;letter-spacing:.13em}.hero-price{position:absolute;z-index:3;top:18px;right:18px;padding:10px 15px;border:1px solid rgba(255,255,255,.25);border-radius:12px;background:rgba(5,18,37,.82);backdrop-filter:blur(8px)}.hero-price strong,.hero-price small{display:block;text-align:center}.hero-price strong{font-size:20px}.hero-stats{display:grid;grid-template-columns:repeat(4,1fr);background:#fff;color:var(--ink);border-bottom:1px solid var(--line)}.hero-stats>div{padding:23px;text-align:center;border-right:1px solid var(--line)}.hero-stats strong,.hero-stats span{display:block}.hero-stats strong{font-size:19px}.hero-stats span{font-size:12px;color:var(--muted)}.section{padding:100px 0}.section-light{background:#fff}.section-mist{background:var(--mist)}.section-navy{background:var(--navy-900);color:#fff}.section-gradient{background:linear-gradient(135deg,#0b3970,var(--blue));color:#fff}.section-heading{max-width:760px;margin-bottom:44px}.section-heading.centered{text-align:center;margin-inline:auto}.section-heading h2,.price-copy h2,.feature-grid h2,.offer-grid h2{margin:0;font-size:clamp(34px,4vw,56px);line-height:1.04;letter-spacing:-.045em}.section-heading>p:not(.eyebrow),.section-heading-split>p,.lead{color:var(--muted);font-size:18px}.section-navy .section-heading>p,.section-gradient p{color:#b9cbdb}.section-heading-split{max-width:none;display:grid;grid-template-columns:1fr .65fr;align-items:end;gap:65px}.journey-grid{list-style:none;margin:0;padding:0;display:grid;grid-template-columns:repeat(5,1fr);gap:14px}.journey-grid li{padding:28px 22px;border:1px solid var(--line);border-radius:var(--radius);background:#fff}.journey-grid li>span{display:grid;place-items:center;width:40px;height:40px;border-radius:12px;background:#e9f4ff;color:var(--blue);font-weight:900}.journey-grid h3{margin:22px 0 8px}.journey-grid p{margin:0;color:var(--muted);font-size:14px}.level-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}.level-grid article{position:relative;padding:28px;border:1px solid rgba(255,255,255,.12);border-radius:var(--radius);background:rgba(255,255,255,.055)}.level-grid h3{margin:19px 0 7px}.level-grid p{color:#aebfd0;min-height:48px}.level-grid small{color:var(--cyan);font-weight:850}.level-badge{display:grid;place-items:center;width:48px;height:48px;border-radius:14px;background:var(--amber);color:var(--ink);font-weight:950}.feature-grid{display:grid;grid-template-columns:.9fr 1.1fr;align-items:center;gap:75px}.ai-demo{padding:30px;border-radius:28px;background:linear-gradient(145deg,var(--navy-900),var(--navy-800));box-shadow:var(--shadow)}.chat-bubble{max-width:86%;padding:16px 18px;border-radius:17px;margin:14px 0;white-space:pre-wrap}.chat-bubble span{display:block;margin-bottom:6px;color:var(--blue);font-size:11px;font-weight:900;text-transform:uppercase;letter-spacing:.13em}.chat-bubble.user{margin-left:auto;background:#eaf4ff}.chat-bubble.tutor{background:#fff}.ai-demo .chat-bubble.tutor{margin-top:24px}.ai-demo .chat-bubble.user{background:var(--blue);color:#fff}.ai-demo .chat-bubble.user span{color:#b8e8ff}.ai-prompt-row{display:flex;flex-wrap:wrap;gap:7px;margin-top:27px}.ai-prompt-row span{padding:7px 10px;border-radius:99px;background:rgba(255,255,255,.1);color:#bed0e0;font-size:12px}.use-case-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}.use-case-grid article{padding:29px;border:1px solid var(--line);border-radius:var(--radius)}.use-case-grid article>span{display:grid;place-items:center;width:45px;height:45px;border-radius:13px;background:#e9f5ff;color:var(--blue);font-size:23px}.use-case-grid h3{margin:20px 0 8px}.use-case-grid p{color:var(--muted);margin:0}.offer-grid{display:grid;grid-template-columns:1fr 450px;align-items:center;gap:80px}.trial-card,.price-card{padding:30px;border-radius:var(--radius);background:#fff;color:var(--ink);box-shadow:var(--shadow)}label{display:block;margin:13px 0;color:var(--ink);font-weight:800;font-size:14px}input,select,textarea{width:100%;margin-top:7px;padding:13px 14px;border:1px solid #c8d4df;border-radius:10px;background:#fff;color:var(--ink);outline:none}input:focus,select:focus,textarea:focus{border-color:var(--blue);box-shadow:0 0 0 3px rgba(22,116,204,.13)}.checkbox{display:flex;align-items:flex-start;gap:10px;font-weight:500}.checkbox input{flex:0 0 auto;width:18px;height:18px;margin:3px 0 0}.checkbox a{color:var(--blue)}.form-status{min-height:20px;margin:10px 0;color:var(--danger);font-weight:700;font-size:13px}.form-status.success{color:var(--success)}.microcopy{color:var(--muted)!important;font-size:12px}.price-wrap{display:grid;grid-template-columns:1fr 430px;gap:90px;align-items:center}.price-card>div{display:flex;align-items:baseline;gap:8px}.price-card>div strong{font-size:58px;letter-spacing:-.06em}.price-card>small{display:block;margin-top:14px;color:var(--muted);text-align:center}.faq-wrap{display:grid;grid-template-columns:.55fr 1fr;gap:80px}.faq-list details{border-bottom:1px solid #cfdae4;padding:21px 0}.faq-list summary{font-weight:850;cursor:pointer}.faq-list p{color:var(--muted)}.site-footer{padding:65px 0 24px;background:var(--navy-950);color:#c6d3df}.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr;gap:70px}.footer-grid>div>a:not(.brand){display:block;margin:10px 0;text-decoration:none}.footer-grid>div>strong{display:block;color:#fff;margin-bottom:14px}.brand-footer{color:#fff}.brand-footer small{color:#9cadbd}.footer-bottom{display:flex;justify-content:space-between;gap:20px;margin-top:55px;padding-top:22px;border-top:1px solid rgba(255,255,255,.12);font-size:12px}.confirmation-page{min-height:100vh;background:var(--mist)}.confirmation-shell{width:min(100%,1100px);margin:auto}.confirmation-shell>.brand{padding:28px}.confirmation-hero{padding:70px 45px;background:var(--navy-900);color:#fff}.confirmation-hero h1{font-size:clamp(38px,6vw,68px);line-height:1;margin:0}.confirmation-card{width:min(90%,760px);margin:55px auto;padding:38px;border-radius:var(--radius);background:#fff;box-shadow:var(--shadow)}.status-badge,.access-pill{display:inline-flex;padding:6px 10px;border-radius:99px;background:#dcf4ea;color:#14765f;font-size:11px;font-weight:850}.notice{padding:18px;border-left:4px solid var(--amber);border-radius:9px;background:#fff4de}.button-row{display:flex;flex-wrap:wrap;gap:10px;margin-top:24px}

/* Aula */
.portal-body{min-height:100vh;background:var(--mist)}.auth-screen{min-height:100vh;display:grid;grid-template-columns:1.08fr .92fr}.auth-brand{display:flex;flex-direction:column;justify-content:center;padding:10vh 9vw;color:#fff;background:radial-gradient(circle at 20% 20%,rgba(51,202,213,.18),transparent 30%),var(--navy-950)}.auth-brand>div{margin:90px 0 35px}.auth-brand h1{max-width:650px;margin:0;font-size:clamp(46px,6vw,78px);line-height:1;letter-spacing:-.055em}.auth-brand p{color:#b8c9d8}.auth-panel{display:grid;place-items:center;padding:35px}.auth-card{width:min(100%,490px);padding:45px;border-radius:24px;background:#fff;box-shadow:var(--shadow)}.auth-card h2{margin:0 0 25px;font-size:38px}.auth-card>p:last-child{text-align:center;font-size:13px;color:var(--muted)}.portal-app{min-height:100vh}.portal-sidebar{position:fixed;z-index:120;inset:0 auto 0 0;width:290px;display:flex;flex-direction:column;padding:24px;background:var(--navy-950);color:#fff}.sidebar-head{display:flex;justify-content:space-between;align-items:center}.sidebar-close{display:none}.portal-nav{display:grid;gap:5px;margin-top:42px}.portal-nav button{display:flex;gap:13px;align-items:center;width:100%;padding:13px;border:0;border-radius:11px;background:transparent;color:#aebfd0;text-align:left;font-weight:750;cursor:pointer}.portal-nav button:hover,.portal-nav button.active{background:rgba(255,255,255,.1);color:#fff}.portal-nav button span{width:23px;color:var(--cyan);text-align:center}.sidebar-user{margin-top:auto;padding-top:20px;border-top:1px solid rgba(255,255,255,.12)}.sidebar-user strong,.sidebar-user small{display:block}.sidebar-user small{color:#98abba}.sidebar-user .access-pill{margin:11px 0 14px}.portal-shell{min-height:100vh;margin-left:290px}.portal-topbar{position:sticky;z-index:90;top:0;height:78px;display:flex;align-items:center;gap:15px;padding:0 34px;border-bottom:1px solid var(--line);background:rgba(255,255,255,.95);backdrop-filter:blur(12px)}.portal-topbar>.icon-button{display:none}.portal-topbar>div:nth-child(2) strong,.portal-topbar>div:nth-child(2) small{display:block}.portal-topbar small{color:var(--muted)}.topbar-actions{display:flex;align-items:center;gap:12px;margin-left:auto}.streak-pill{padding:8px 11px;border:1px solid var(--line);border-radius:99px;font-size:13px}.avatar{width:40px;height:40px;border:0;border-radius:50%;background:var(--navy-900);color:#fff;font-weight:900;cursor:pointer}.icon-button{display:inline-grid;place-items:center;width:42px;height:42px;border:1px solid var(--line);border-radius:10px;background:#fff;color:var(--ink);font-size:21px;cursor:pointer}.portal-main{padding:50px 4vw 80px}.portal-view{display:none}.portal-view.active{display:block}.welcome-row,.view-heading{display:flex;align-items:end;justify-content:space-between;gap:25px;margin-bottom:32px}.welcome-row h1,.view-heading h1{margin:0;font-size:clamp(38px,5vw,58px);line-height:1;letter-spacing:-.05em}.welcome-row p,.view-heading p{color:var(--muted)}.metric-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:15px}.metric-grid article,.portal-card{border:1px solid var(--line);border-radius:18px;background:#fff;box-shadow:0 9px 24px rgba(7,24,46,.05)}.metric-grid article{padding:23px}.metric-grid strong,.metric-grid span{display:block}.metric-grid strong{font-size:32px}.metric-grid span{color:var(--muted);font-size:13px}.dashboard-grid{display:grid;grid-template-columns:1.3fr .7fr;gap:16px;margin-top:16px}.portal-card{padding:28px}.portal-card h2{margin:0}.today-card{grid-row:span 2}.progress-track{height:9px;margin:28px 0;border-radius:99px;background:#e6eef5;overflow:hidden}.progress-track span{display:block;height:100%;border-radius:inherit;background:linear-gradient(90deg,var(--blue),var(--cyan))}.week-dots{display:flex;gap:8px;margin:25px 0}.week-dots span{display:grid;place-items:center;width:35px;height:35px;border:1px solid var(--line);border-radius:50%;color:var(--muted);font-size:11px}.week-dots span.done{border-color:var(--blue);background:var(--blue);color:#fff}.quick-card>div{display:flex;flex-wrap:wrap;gap:8px;margin-top:20px}.quick-card button{padding:9px 12px;border:1px solid var(--line);border-radius:9px;background:#fff;font-weight:800;cursor:pointer}.level-selector{display:flex;flex-wrap:wrap;gap:6px}.level-selector button{width:44px;height:40px;border:1px solid var(--line);border-radius:10px;background:#fff;font-weight:900;cursor:pointer}.level-selector button.active{background:var(--navy-900);color:#fff}.course-layout{display:grid;grid-template-columns:300px minmax(0,1fr);gap:18px}.unit-list{max-height:calc(100vh - 190px);overflow:auto;border:1px solid var(--line);border-radius:18px;background:#fff}.unit-list button{display:block;width:100%;padding:17px 18px;border:0;border-bottom:1px solid var(--line);background:#fff;text-align:left;cursor:pointer}.unit-list button:last-child{border:0}.unit-list button.active{background:#eaf5ff}.unit-list small,.unit-list strong{display:block}.unit-list small{color:var(--blue);font-size:10px;font-weight:900;letter-spacing:.09em;text-transform:uppercase}.lesson-stage{min-width:0}.lesson-empty{display:grid;place-items:center;min-height:400px;padding:35px;border:2px dashed var(--line);border-radius:18px;background:#fff;text-align:center}.lesson-view{padding:30px;border:1px solid var(--line);border-radius:18px;background:#fff}.lesson-head{display:flex;justify-content:space-between;gap:20px}.lesson-head h1{margin:0;font-size:38px}.lesson-head p{color:var(--muted)}.lesson-tabs{display:flex;overflow-x:auto;margin:30px -30px 0;padding:0 30px;border-bottom:1px solid var(--line)}.lesson-tabs button{white-space:nowrap;padding:13px 15px;border:0;border-bottom:3px solid transparent;background:none;font-weight:800;cursor:pointer}.lesson-tabs button[aria-selected=true]{border-color:var(--blue);color:var(--blue)}.lesson-content{min-height:350px;padding:28px 0}.lesson-content h2{font-size:30px}.lesson-content .concept-box{padding:21px;border-radius:14px;background:#edf6ff}.lesson-content .mistake-box{padding:18px;border-left:4px solid var(--amber);border-radius:9px;background:#fff4df}.vocabulary-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:10px}.vocab-card{padding:15px;border:1px solid var(--line);border-radius:11px}.vocab-card strong,.vocab-card span{display:block}.vocab-card span{color:var(--muted)}.audio-player{padding:25px;border-radius:17px;background:var(--navy-900);color:#fff}.audio-controls{display:flex;align-items:center;gap:11px}.audio-script{margin-top:19px;padding:18px;border-radius:12px;background:rgba(255,255,255,.09)}.quiz-option{display:block;width:100%;margin:8px 0;padding:13px;border:1px solid var(--line);border-radius:10px;background:#fff;text-align:left;cursor:pointer}.quiz-option.correct{border-color:var(--success);background:#e8f7f1}.quiz-option.wrong{border-color:var(--danger);background:#fff0f1}.lesson-actions{display:flex;justify-content:space-between;gap:10px;padding-top:18px;border-top:1px solid var(--line)}.assessment-card{max-width:850px}.assessment-question{margin:18px 0;padding:20px;border:1px solid var(--line);border-radius:13px}.assessment-result{padding:27px;border-radius:15px;background:#eaf5ff}.practice-layout{display:grid;grid-template-columns:310px 1fr;gap:16px}.practice-settings label{margin-top:0}.ai-workspace{display:flex;flex-direction:column;min-height:590px}.ai-messages{flex:1;overflow:auto}.ai-workspace .chat-bubble.tutor{border:1px solid var(--line);background:#f5f8fb}.ai-composer{margin-top:20px;padding-top:15px;border-top:1px solid var(--line)}.ai-composer textarea{resize:vertical}.ai-composer>div{display:flex;justify-content:space-between;align-items:center;gap:11px}.ai-composer>div>span{margin-left:auto;color:var(--muted);font-size:12px}.review-list,.exam-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:15px}.review-item,.exam-card{padding:23px;border:1px solid var(--line);border-radius:15px;background:#fff}.review-item .tag{display:inline-block;padding:4px 8px;border-radius:99px;background:#fff1d8;color:#895b05;font-size:11px;font-weight:850}.empty-state{grid-column:1/-1;padding:45px;border:2px dashed var(--line);border-radius:16px;text-align:center;color:var(--muted)}.certificate-card{text-align:center}.certificate-preview{max-width:700px;margin:0 auto 25px;padding:55px;border:8px double var(--navy-800);background:#fffdf6}.certificate-preview .brand-mark{margin:auto}.certificate-preview h2{font-family:Georgia,serif;font-size:42px}.certificate-preview p,.certificate-preview strong,.certificate-preview small{display:block;margin:15px}.profile-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:15px}.account-data>div{display:flex;justify-content:space-between;padding:13px 0;border-bottom:1px solid var(--line)}.account-data dt{color:var(--muted)}.account-data dd{font-weight:800}.danger-card{grid-column:1/-1}.sr-only,.sr-only:focus{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:1050px){
  .main-nav{position:fixed;top:76px;left:0;right:0;display:none;align-items:stretch;padding:20px;background:#fff;border-bottom:1px solid var(--line);box-shadow:var(--shadow)}.main-nav.open{display:grid}.menu-toggle{display:block}.hero-grid{grid-template-columns:1fr 420px;gap:30px}.journey-grid{grid-template-columns:repeat(3,1fr)}.use-case-grid{grid-template-columns:repeat(2,1fr)}.portal-sidebar{transform:translateX(-101%);transition:.22s}.portal-sidebar.open{transform:none}.sidebar-close{display:grid}.portal-shell{margin-left:0}.portal-topbar>.icon-button{display:grid}.course-layout{grid-template-columns:260px 1fr}
}
@media (max-width:780px){
  :root{--shell:min(100% - 28px,1180px)}.header-inner{min-height:68px}.main-nav{top:68px}.hero-grid{min-height:0;padding:50px 0;grid-template-columns:1fr}.hero h1{font-size:48px}.hero-lead{font-size:17px}.hero-visual{min-height:430px}.hero-visual>img{height:430px}.hero-stats{grid-template-columns:repeat(2,1fr)}.hero-stats>div:nth-child(2){border-right:0}.section{padding:72px 0}.section-heading-split,.feature-grid,.offer-grid,.price-wrap,.faq-wrap{grid-template-columns:1fr;gap:35px}.journey-grid,.level-grid{grid-template-columns:repeat(2,1fr)}.auth-screen{grid-template-columns:1fr}.auth-brand{min-height:350px;padding:55px 28px}.auth-brand>div{margin:45px 0 15px}.auth-brand h1{font-size:45px}.auth-panel{padding:22px}.portal-main{padding:35px 18px 70px}.metric-grid{grid-template-columns:repeat(2,1fr)}.dashboard-grid{grid-template-columns:1fr}.today-card{grid-row:auto}.welcome-row,.view-heading{align-items:flex-start;flex-direction:column}.course-layout{grid-template-columns:1fr}.unit-list{display:flex;max-height:none;overflow:auto}.unit-list button{min-width:215px;border-bottom:0;border-right:1px solid var(--line)}.practice-layout,.profile-grid{grid-template-columns:1fr}.review-list,.exam-grid{grid-template-columns:1fr}.lesson-tabs{margin-inline:-20px;padding-inline:20px}.lesson-view{padding:20px}.footer-grid{grid-template-columns:1fr 1fr}.footer-grid>div:first-child{grid-column:1/-1}.footer-bottom{flex-direction:column}.confirmation-hero{padding:55px 25px}
}
@media (max-width:520px){
  .brand small{max-width:150px}.hero h1{font-size:41px}.hero-actions .button{width:100%}.hero-visual,.hero-visual>img{height:390px;min-height:390px}.hero-visual figcaption strong{font-size:20px}.journey-grid,.level-grid,.use-case-grid{grid-template-columns:1fr}.section-heading h2,.price-copy h2,.feature-grid h2,.offer-grid h2{font-size:36px}.section-heading>p:not(.eyebrow),.section-heading-split>p,.lead{font-size:16px}.trial-card,.price-card,.portal-card,.auth-card{padding:21px}.price-card>div strong{font-size:48px}.footer-grid{grid-template-columns:1fr}.footer-grid>div:first-child{grid-column:auto}.portal-topbar{height:70px;padding:0 14px}.portal-topbar>div:nth-child(2) small,.streak-pill{display:none}.portal-sidebar{width:min(88vw,310px)}.metric-grid{gap:8px}.metric-grid article{padding:17px}.metric-grid strong{font-size:25px}.lesson-actions{flex-direction:column}.lesson-actions .button{width:100%}.vocabulary-grid{grid-template-columns:1fr}.certificate-preview{padding:30px 15px}.certificate-preview h2{font-size:31px}.button-row .button{width:100%}
}
@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,*:before,*:after{transition:none!important;animation:none!important}}

/* Recuperación de acceso y audio adaptable. */
[hidden]{display:none!important}
.auth-help{margin:-10px 0 22px;color:var(--muted);font-size:14px}
.form-status.notice{padding:10px 12px;border-left:4px solid var(--amber);border-radius:8px;background:#fff4de;color:#6f4a08}
.audio-disclosure{margin:12px 0 0;color:var(--muted);font-size:12px;font-weight:700}
.audio-player .audio-disclosure{color:#c4d4e2}
button:disabled,input:disabled,select:disabled,textarea:disabled{cursor:not-allowed;opacity:.65}

/* Verificación del correo antes de activar la prueba. */
.trial-verification{margin:14px 0 18px;padding:18px;border:1px solid #c7dbea;border-radius:13px;background:#f4f9fd}
.verification-heading{margin:0 0 15px;color:var(--ink)!important}
.verification-heading strong,.verification-heading span{display:block}
.verification-heading span{margin-top:5px;color:var(--muted);font-size:13px;font-weight:500}
.verification-heading b{overflow-wrap:anywhere;color:var(--blue)}
.trial-verification input{font-size:24px;font-weight:850;letter-spacing:.28em;text-align:center}
.verification-actions{display:flex;flex-wrap:wrap;justify-content:space-between;gap:8px 14px}
.verification-actions .text-button{padding:6px 0;font-size:12px}
.verification-actions .text-button:focus-visible{outline:3px solid rgba(22,116,204,.28);outline-offset:3px}
@media(max-width:520px){.verification-actions{align-items:flex-start;flex-direction:column}}
.button:disabled{opacity:.55;cursor:not-allowed;transform:none}

@page{size:A4 landscape;margin:12mm}
@media print{
  body.portal-body{background:#fff}
  body.portal-body *{visibility:hidden}
  body.portal-body [data-certificate-card],
  body.portal-body [data-certificate-card] *{visibility:visible}
  body.portal-body [data-certificate-card]{position:absolute;inset:0;width:100%;padding:0;border:0;box-shadow:none}
  body.portal-body [data-certificate-card] [data-download-certificate]{display:none!important}
  body.portal-body .certificate-preview{width:100%;max-width:none;min-height:170mm;margin:0;padding:28mm 22mm;break-inside:avoid;box-shadow:none}
}