:root{--navy:#0b2545;--blue:#1368d7;--blue2:#2d8cff;--orange:#f28c28;--bg:#f4f7fb;--text:#182235;--muted:#6f7b8f;--line:#e4eaf2;--white:#fff;--shadow:0 14px 34px rgba(17,44,82,.09)}*{box-sizing:border-box}body{margin:0;font-family:Inter,Segoe UI,Arial,sans-serif;background:var(--bg);color:var(--text)}button,input{font:inherit}.app-layout{min-height:100vh}.sidebar{position:fixed;inset:0 auto 0 0;width:245px;background:linear-gradient(180deg,#0b2545,#081a31);color:#fff;padding:24px 16px;display:flex;flex-direction:column;z-index:20}.sidebar-brand{display:flex;align-items:center;gap:12px;padding:0 8px 24px}.sidebar-brand>span,.brand-mark{width:44px;height:44px;border-radius:14px;background:linear-gradient(135deg,var(--orange),#ffb55f);display:grid;place-items:center;font-weight:900;color:#fff}.sidebar-brand strong,.sidebar-brand small{display:block}.sidebar-brand small{opacity:.62;margin-top:3px}.sidebar nav{display:grid;gap:5px}.sidebar nav a,.logout-link{color:#d9e6f7;text-decoration:none;padding:12px 14px;border-radius:12px;display:flex;gap:13px;align-items:center}.sidebar nav a:hover,.sidebar nav a.active{background:rgba(255,255,255,.11);color:#fff}.logout-link{margin-top:auto}.main-content{margin-left:245px;padding:0 28px 36px}.topbar{height:76px;display:flex;align-items:center;justify-content:space-between;border-bottom:1px solid var(--line);margin:0 -28px;padding:0 28px;background:rgba(244,247,251,.92);position:sticky;top:0;z-index:10;backdrop-filter:blur(10px)}.menu-button{display:none;border:0;background:transparent;font-size:25px}.search-box{background:#fff;border:1px solid var(--line);border-radius:13px;padding:11px 15px;min-width:340px;color:var(--muted)}.search-box input{border:0;outline:0;width:90%;margin-left:8px}.top-actions,.user-chip{display:flex;align-items:center;gap:12px}.top-actions button{border:0;background:#fff;border-radius:11px;padding:10px}.avatar{width:38px;height:38px;border-radius:12px;background:var(--navy);color:#fff;display:grid;place-items:center;font-weight:800}.welcome-row{display:flex;justify-content:space-between;align-items:center;padding:34px 0 22px}.welcome-row h1{font-size:32px;margin:6px 0}.welcome-row p{margin:0;color:var(--muted)}.eyebrow{font-size:11px;font-weight:800;letter-spacing:.12em;color:var(--blue)}.streak-card{display:flex;align-items:center;gap:12px;background:#fff;padding:15px 18px;border-radius:16px;box-shadow:var(--shadow)}.streak-card>span{font-size:32px}.streak-card strong,.streak-card small{display:block}.streak-card small{color:var(--muted);margin-top:3px}.hero-grid{display:grid;grid-template-columns:2fr .8fr .75fr;gap:18px}.continue-card,.level-card,.xp-card,.panel,.stats-grid article{background:#fff;border:1px solid var(--line);border-radius:20px;box-shadow:var(--shadow)}.continue-card{padding:28px;background:linear-gradient(135deg,#0c2c55,#1368d7);color:#fff}.course-tag{display:inline-block;padding:7px 10px;border-radius:999px;background:rgba(255,255,255,.14);font-size:12px;font-weight:700}.continue-card h2{font-size:26px;margin:18px 0 8px}.continue-card p{opacity:.78}.progress-line,.mini-progress{height:8px;background:rgba(255,255,255,.2);border-radius:99px;overflow:hidden}.progress-line span,.mini-progress span{display:block;height:100%;background:linear-gradient(90deg,var(--orange),#ffc26f);border-radius:99px}.progress-caption{display:flex;justify-content:space-between;margin:9px 0 20px;font-size:13px}.primary-button,.secondary-button,.ghost-button{border:0;border-radius:12px;padding:12px 17px;font-weight:800;cursor:pointer}.primary-button{background:var(--orange);color:#fff}.primary-button.wide{width:100%}.secondary-button{background:#fff;color:var(--blue)}.ghost-button{background:#eef4fc;color:var(--blue)}.level-card,.xp-card{padding:22px;text-align:center;display:flex;flex-direction:column;align-items:center;justify-content:center}.ring{--value:50;width:135px;height:135px;border-radius:50%;display:grid;place-items:center;background:conic-gradient(var(--blue) calc(var(--value)*1%),#e9eef5 0);position:relative}.ring:before{content:'';position:absolute;width:104px;height:104px;border-radius:50%;background:#fff}.ring div{position:relative}.ring strong,.ring span{display:block}.ring strong{font-size:25px}.ring span{color:var(--muted);font-size:12px}.level-card h3{margin:14px 0 4px}.level-card p,.xp-card p{color:var(--muted);margin:0}.xp-card .card-icon{font-size:35px}.xp-card small{color:var(--muted);margin:11px}.xp-card strong{font-size:28px}.stats-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;margin:18px 0}.stats-grid article{padding:19px;display:flex;align-items:center;gap:14px}.stats-grid article>span{font-size:25px}.stats-grid small,.stats-grid strong{display:block}.stats-grid small{color:var(--muted);margin-bottom:5px}.content-grid{display:grid;gap:18px;margin-bottom:18px}.content-grid.two-thirds{grid-template-columns:2fr 1fr}.content-grid.three-cols{grid-template-columns:repeat(3,1fr)}.panel{padding:22px}.panel-heading{display:flex;justify-content:space-between;align-items:center;margin-bottom:18px}.panel-heading h2,.panel-heading h3{margin:4px 0 0}.skills-layout{display:grid;grid-template-columns:1.05fr 1fr;align-items:center}.skill-row{margin-bottom:13px}.skill-row>div:first-child{display:flex;justify-content:space-between;font-size:13px;margin-bottom:6px}.mini-progress{height:7px;background:#edf1f6}.mission-xp{background:#fff0df;color:#b65c00;padding:7px 10px;border-radius:99px;font-weight:800}.mission-list{display:grid;gap:10px}.mission-item{display:grid;grid-template-columns:auto 1fr auto;align-items:center;gap:12px;padding:12px;background:#f7f9fc;border-radius:13px}.mission-item.done{opacity:.6}.mission-item .check{width:29px;height:29px;border-radius:50%;display:grid;place-items:center;background:#e9f1fb;color:var(--blue);font-weight:900}.mission-item small,.mission-item strong{display:block}.mission-item small{color:var(--muted);margin-top:4px}.mission-item b{color:var(--orange)}.ai-panel{background:linear-gradient(135deg,#1267d3,#2f8cff);color:#fff}.ai-title{display:flex;gap:12px;align-items:center}.ai-title>span{font-size:30px}.ai-title small{opacity:.75}.ai-title h3{margin:4px 0}.ai-panel p{line-height:1.6}.vocab-stat{text-align:center;padding:16px;background:#f7f9fc;border-radius:14px}.vocab-stat b{font-size:32px;display:block}.vocab-stat span,.vocab-split span{color:var(--muted);font-size:12px}.vocab-split{display:grid;grid-template-columns:1fr 1fr;gap:10px;margin-top:10px}.vocab-split div{text-align:center;padding:12px;border:1px solid var(--line);border-radius:13px}.vocab-split b,.vocab-split span{display:block}.badge-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:10px}.badge-grid div{text-align:center;background:#f7f9fc;border-radius:13px;padding:11px}.badge-grid span{display:block;font-size:28px}.badge-grid small{display:block;margin-top:5px}.activity-row{display:grid;grid-template-columns:auto 1fr auto 120px;align-items:center;gap:14px;padding:14px 0;border-top:1px solid var(--line)}.activity-row:first-child{border-top:0}.activity-icon{width:38px;height:38px;border-radius:11px;background:#edf4fd;color:var(--blue);display:grid;place-items:center;font-weight:900}.activity-row strong,.activity-row small{display:block}.activity-row small,.activity-row time{color:var(--muted);font-size:12px;margin-top:4px}.login-body{min-height:100vh;background:linear-gradient(135deg,#081a31,#0f4f9c);display:grid;place-items:center;padding:24px}.login-shell{width:min(1050px,100%);display:grid;grid-template-columns:1.2fr .8fr;background:#fff;border-radius:26px;overflow:hidden;box-shadow:0 30px 80px rgba(0,0,0,.25)}.login-hero{padding:64px;background:linear-gradient(145deg,#0b2545,#1368d7);color:#fff}.brand-pill{display:inline-block;background:rgba(255,255,255,.13);padding:8px 12px;border-radius:999px;font-size:12px;font-weight:800;letter-spacing:.12em}.login-hero h1{font-size:43px;line-height:1.08;margin:28px 0 18px}.login-hero p{font-size:18px;line-height:1.6;opacity:.82}.hero-stats{display:grid;grid-template-columns:repeat(3,1fr);gap:10px;margin-top:40px}.hero-stats div{padding:16px;background:rgba(255,255,255,.1);border-radius:14px}.hero-stats strong,.hero-stats span{display:block}.hero-stats strong{font-size:22px}.hero-stats span{font-size:12px;opacity:.75;margin-top:5px}.login-card{padding:54px}.login-card h2{font-size:30px;margin:22px 0 4px}.login-card>p{color:var(--muted)}.login-card form{display:grid;gap:10px;margin-top:26px}.login-card label{font-size:13px;font-weight:700;margin-top:8px}.login-card input{padding:13px;border:1px solid var(--line);border-radius:11px;outline:0}.login-card input:focus{border-color:var(--blue)}.login-card .primary-button{margin-top:12px}.demo-note{margin-top:20px;padding:13px;background:#f7f9fc;border-radius:11px;font-size:12px;line-height:1.6}.alert.error{background:#fff1f1;color:#b42828;padding:11px;border-radius:10px;margin-top:15px}@media(max-width:1050px){.hero-grid{grid-template-columns:1.6fr 1fr}.xp-card{display:none}.content-grid.two-thirds,.content-grid.three-cols{grid-template-columns:1fr}.stats-grid{grid-template-columns:repeat(2,1fr)}}@media(max-width:760px){.sidebar{transform:translateX(-100%);transition:.25s}.sidebar.open{transform:translateX(0)}.main-content{margin-left:0;padding:0 16px 24px}.topbar{margin:0 -16px;padding:0 16px}.menu-button{display:block}.search-box{display:none}.welcome-row{align-items:flex-start}.welcome-row h1{font-size:26px}.streak-card{padding:11px}.hero-grid{grid-template-columns:1fr}.level-card{display:none}.stats-grid{grid-template-columns:1fr 1fr}.skills-layout{grid-template-columns:1fr}.activity-row{grid-template-columns:auto 1fr auto}.activity-row time{display:none}.login-shell{grid-template-columns:1fr}.login-hero{display:none}.login-card{padding:35px 25px}}
.button-link{display:inline-flex;align-items:center;justify-content:center;text-decoration:none}.route-head{display:flex;justify-content:space-between;gap:20px;align-items:center;padding:34px 0 20px}.route-head h1{margin:6px 0;font-size:32px}.route-head p{color:var(--muted);margin:0}.route-summary{background:#fff;border:1px solid var(--line);border-radius:18px;padding:16px 22px;text-align:center;box-shadow:var(--shadow)}.route-summary strong,.route-summary span,.route-summary small{display:block}.route-summary strong{font-size:28px;color:var(--blue)}.route-summary span{font-weight:800;margin:3px}.route-summary small{color:var(--muted)}.learning-path{max-width:950px;margin:0 auto}.unit-block{background:#fff;border:1px solid var(--line);border-radius:24px;padding:25px;margin-bottom:24px;box-shadow:var(--shadow)}.unit-heading{display:grid;grid-template-columns:auto 1fr auto;gap:16px;align-items:center;padding-bottom:20px;border-bottom:1px solid var(--line)}.unit-number{width:54px;height:54px;border-radius:18px;background:linear-gradient(135deg,var(--blue),var(--blue2));color:#fff;display:grid;place-items:center;font-size:22px;font-weight:900}.unit-heading span{font-size:11px;letter-spacing:.12em;color:var(--blue);font-weight:900}.unit-heading h2{margin:4px 0}.unit-heading p{margin:0;color:var(--muted)}.unit-score{text-align:center}.unit-score strong,.unit-score small{display:block}.unit-score strong{font-size:22px}.unit-score small{color:var(--muted)}.path-nodes{padding:14px 5px}.path-step{display:grid;grid-template-columns:70px 1fr;gap:18px;position:relative;min-height:108px;align-items:center}.path-line{position:absolute;left:34px;top:0;bottom:0;width:3px;background:#e4eaf2}.path-step:last-child .path-line{bottom:50%}.lesson-node{width:68px;height:68px;border-radius:50%;display:grid;place-items:center;z-index:1;text-decoration:none;border:7px solid #edf3fa;background:#fff}.available .lesson-node{background:linear-gradient(135deg,var(--blue),var(--blue2));box-shadow:0 8px 20px rgba(19,104,215,.25)}.complete .lesson-node{background:linear-gradient(135deg,#20b978,#55d69e)}.locked .lesson-node{background:#eef1f5}.node-icon{font-weight:900;font-size:21px;color:#fff}.locked .node-icon{filter:grayscale(1);font-size:18px}.lesson-info{padding:14px 18px;border:1px solid var(--line);border-radius:16px;background:#fbfcfe}.lesson-info small{color:var(--muted)}.lesson-info h3{margin:6px 0 9px}.lesson-meta{display:flex;gap:10px}.lesson-meta span{font-size:11px;font-weight:800;background:#edf4fd;color:var(--blue);padding:5px 9px;border-radius:99px}.complete .lesson-meta span:last-child{background:#e5f8ef;color:#158258}.locked .lesson-info{opacity:.55}.final-node{text-align:center;padding:30px;margin:10px 0 40px}.final-node>div{width:84px;height:84px;border-radius:50%;background:linear-gradient(135deg,var(--orange),#ffbd67);display:grid;place-items:center;margin:auto;font-size:38px;box-shadow:0 12px 30px rgba(242,140,40,.25)}.final-node h2{margin-bottom:5px}.final-node p{color:var(--muted)}.lesson-body{background:linear-gradient(145deg,#edf4fc,#f8fafc);min-height:100vh}.lesson-shell{max-width:1080px;margin:auto;padding:20px}.lesson-top{display:grid;grid-template-columns:150px 1fr 120px;align-items:center;gap:20px;padding:16px}.lesson-top>a{text-decoration:none;color:var(--blue);font-weight:800}.lesson-top>span{text-align:right;font-weight:900;color:var(--orange)}.lesson-progress span{display:block;text-align:center;font-weight:800;margin-bottom:7px}.lesson-progress div{height:8px;background:#dfe7f1;border-radius:99px;overflow:hidden}.lesson-progress i{display:block;height:100%;background:linear-gradient(90deg,var(--orange),#ffc16a)}.lesson-card{background:#fff;border:1px solid var(--line);border-radius:26px;padding:34px;box-shadow:var(--shadow)}.lesson-chip{display:inline-block;padding:7px 11px;background:#edf4fd;color:var(--blue);border-radius:99px;font-size:12px;font-weight:900}.lesson-card h1{font-size:34px;margin:16px 0 6px}.lesson-intro{color:var(--muted)}.lesson-demo{display:grid;grid-template-columns:220px 1fr;gap:28px;margin:28px 0;padding:25px;background:#f7f9fc;border-radius:20px}.lesson-visual{min-height:240px;border-radius:20px;background:linear-gradient(145deg,var(--blue),#6bb4ff);display:grid;place-items:center;color:#fff;font-size:90px;font-weight:900}.practice-line{display:grid;grid-template-columns:34px 1fr 40px;align-items:center;gap:10px;background:#fff;border:1px solid var(--line);padding:12px;border-radius:13px;margin:10px 0}.practice-line b{width:30px;height:30px;border-radius:50%;display:grid;place-items:center;background:#edf4fd;color:var(--blue)}.practice-line button{border:0;background:#edf4fd;border-radius:10px;padding:8px;color:var(--blue)}.quick-check{padding:22px;border:1px solid var(--line);border-radius:18px}.question-box{display:flex;gap:15px;align-items:center;flex-wrap:wrap}.question-box strong{margin-right:auto}.question-box label{padding:10px 15px;background:#f5f8fc;border-radius:12px}.lesson-actions{display:flex;justify-content:space-between;gap:15px;margin-top:24px}.badge-symbol{font-family:inherit!important}@media(max-width:760px){.route-head{align-items:flex-start}.route-summary{display:none}.unit-heading{grid-template-columns:auto 1fr}.unit-score{display:none}.path-step{grid-template-columns:56px 1fr;gap:10px}.lesson-node{width:54px;height:54px;border-width:5px}.path-line{left:27px}.lesson-demo{grid-template-columns:1fr}.lesson-visual{min-height:150px}.lesson-top{grid-template-columns:auto 1fr}.lesson-top>span{display:none}.lesson-card{padding:22px}.lesson-card h1{font-size:27px}.lesson-actions{flex-direction:column-reverse}}


/* =========================================================
   MÓDULOS 3 Y 4: RUTA INTELIGENTE Y LECCIONES INTERACTIVAS
   ========================================================= */

.route-success {
    margin: 22px 0 0;
    padding: 16px 20px;
    border: 1px solid #a7e7c4;
    border-radius: 16px;
    background: #effcf5;
    color: #146c43;
    font-weight: 700;
}

.unit-progress-line {
    width: min(360px, 100%);
    height: 7px;
    margin-top: 12px;
    overflow: hidden;
    border-radius: 999px;
    background: #e8edf5;
}

.unit-progress-line span {
    display: block;
    height: 100%;
    border-radius: inherit;
    background: linear-gradient(90deg, #153e75, #f59e0b);
}

.path-step.available .lesson-node {
    animation: lessonPulse 2.4s infinite;
}

.path-step.locked {
    opacity: .62;
}

.path-step.locked .lesson-node {
    cursor: not-allowed;
    filter: grayscale(.4);
}

@keyframes lessonPulse {
    0%, 100% { box-shadow: 0 0 0 0 rgba(245, 158, 11, .28); }
    50% { box-shadow: 0 0 0 12px rgba(245, 158, 11, 0); }
}

.question-heading {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 18px;
    margin-bottom: 18px;
}

.question-phrase {
    padding: 22px;
    margin: 0 0 20px;
    border-radius: 18px;
    background: #f6f8fc;
    color: #172b4d;
    font-size: clamp(1.15rem, 2vw, 1.55rem);
    font-weight: 800;
    text-align: center;
}

.audio-main-button {
    flex: 0 0 auto;
    border: 1px solid #d9e1ee;
    border-radius: 12px;
    padding: 10px 14px;
    background: #fff;
    color: #153e75;
    cursor: pointer;
    font-weight: 700;
}

.answer-options {
    display: grid;
    gap: 12px;
}

.answer-option {
    display: flex;
    align-items: center;
    min-height: 58px;
    padding: 0 18px;
    border: 2px solid #dde4ef;
    border-radius: 15px;
    background: #fff;
    cursor: pointer;
    transition: .18s ease;
}

.answer-option:hover,
.answer-option.selected,
.answer-option:has(input:checked) {
    border-color: #f59e0b;
    background: #fffaf0;
    transform: translateY(-1px);
}

.answer-option input {
    width: 19px;
    height: 19px;
    margin-right: 13px;
    accent-color: #f59e0b;
}

.answer-option span {
    font-weight: 750;
    color: #24344d;
}

.lesson-actions button:disabled {
    cursor: not-allowed;
    opacity: .48;
}

.lesson-feedback {
    margin: 22px 0;
    padding: 18px 20px;
    border-radius: 16px;
    border: 1px solid transparent;
}

.lesson-feedback strong {
    display: block;
    margin-bottom: 6px;
    font-size: 1.08rem;
}

.lesson-feedback p {
    margin: 0 0 6px;
}

.lesson-feedback.success {
    border-color: #9cdeb9;
    background: #effcf5;
    color: #12643d;
}

.lesson-feedback.error {
    border-color: #f3b7b7;
    background: #fff2f2;
    color: #9b2525;
}

.speak-button {
    cursor: pointer;
}

@media (max-width: 700px) {
    .question-heading {
        flex-direction: column;
    }

    .audio-main-button {
        width: 100%;
    }

    .lesson-actions {
        display: grid;
        gap: 10px;
    }

    .lesson-actions .button-link,
    .lesson-actions button {
        width: 100%;
        text-align: center;
    }
}