/* ---------- Course experience ---------- */
.brand-link{display:flex;align-items:center;gap:10px;color:var(--chalk);font-family:'Fredoka',sans-serif;font-weight:600}
.brand-link:hover{color:var(--chalk)}
.course-hero{background:var(--ink);color:var(--chalk);padding:55px 0 70px;border-bottom:4px solid var(--marker)}
.course-hero .back-link{color:var(--pencil);display:inline-block;margin-bottom:30px}
.course-hero-grid{display:grid;grid-template-columns:minmax(0,1.5fr) minmax(280px,.7fr);gap:50px;align-items:end}
.course-icon-large{font-size:58px;margin-bottom:12px}
.course-hero h1{font-family:'Fredoka',sans-serif;font-size:clamp(38px,5vw,64px);line-height:1.02;margin:10px 0 18px;color:var(--chalk)}
.course-description{font-size:18px;line-height:1.7;color:var(--pencil);max-width:780px}
.course-meta-large{display:flex;gap:18px;flex-wrap:wrap;margin-top:24px;color:var(--chalk);font-family:'Space Mono',monospace;font-size:12px}
.course-progress-card{background:#fff;color:var(--ink);padding:26px;border-radius:18px;box-shadow:10px 10px 0 var(--marker)}
.progress-top{display:flex;justify-content:space-between;align-items:center;margin-bottom:12px}
.progress-bar{height:12px;background:#e9e9e3;border-radius:20px;overflow:hidden}
.progress-bar span{display:block;height:100%;width:0;background:var(--green);border-radius:20px;transition:width .35s ease}
.course-progress-card p{font-size:13px;color:#666;margin:12px 0 20px}
.course-content{background:#f7f7f2}
.course-layout{display:grid;grid-template-columns:minmax(0,1fr) 320px;gap:38px;align-items:start}
.course-intro-card{background:#fff;border:2px solid var(--ink);padding:26px;border-radius:14px;margin-bottom:45px}
.course-intro-card p{font-size:17px;line-height:1.7;margin:8px 0 0}
.module-section{margin-bottom:55px}
.module-heading{margin-bottom:18px}
.module-heading>span{font-family:'Space Mono',monospace;font-size:11px;text-transform:uppercase;letter-spacing:.12em;color:#777}
.module-heading h2{font-family:'Fredoka',sans-serif;font-size:32px;margin:5px 0;color:var(--ink)}
.lesson-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
.lesson-card{background:#fff;border:2px solid #ddd;border-radius:14px;padding:20px;display:flex;gap:14px;min-height:235px;transition:.2s}
.lesson-card:hover{transform:translateY(-3px);border-color:var(--ink);box-shadow:5px 5px 0 var(--ink)}
.lesson-card.completed{border-color:var(--green)}
.lesson-number{font-family:'Space Mono',monospace;font-weight:700;font-size:12px;min-width:27px;height:27px;display:grid;place-items:center;background:#f1f1eb;border-radius:50%}
.lesson-module{font-size:10px;text-transform:uppercase;color:#888;font-family:'Space Mono',monospace}
.lesson-card h3{font-family:'Fredoka',sans-serif;font-size:21px;margin:6px 0 9px}
.lesson-card p{font-size:13px;line-height:1.55;color:#666;margin:0 0 16px}
.btn-lesson{border:0;background:none;padding:0;font-weight:700;color:var(--ink);cursor:pointer;font-family:Inter,sans-serif}
.btn-lesson:hover{text-decoration:underline}
.course-sidebar{position:sticky;top:90px}
.syllabus-card{background:#fff;border:2px solid var(--ink);border-radius:14px;padding:20px}
.syllabus-card h3{font-family:'Fredoka',sans-serif;font-size:23px;margin:0 0 16px}
.syllabus-module{border-top:1px solid #ddd;padding:15px 0}
.syllabus-module:first-child{border-top:0;padding-top:0}
.syllabus-module-title{display:flex;gap:10px;align-items:center;font-size:13px;margin-bottom:8px}
.syllabus-module-title span{font-family:'Space Mono',monospace;font-size:10px;background:var(--marker);padding:4px 6px;border-radius:5px}
.syllabus-lesson{display:flex;align-items:center;gap:8px;width:100%;text-align:left;background:none;border:0;padding:7px 4px;color:#555;font-size:12px;cursor:pointer}
.syllabus-lesson:hover{color:var(--ink)}
.syllabus-lesson.done{color:#25824b}
.lesson-status{font-family:'Space Mono',monospace;font-size:12px}
.lesson-modal{position:fixed;inset:0;background:rgba(10,12,12,.78);display:grid;place-items:center;padding:20px;z-index:1000}
.lesson-modal.hidden{display:none}
.lesson-dialog{position:relative;background:#fff;color:var(--ink);width:min(760px,100%);max-height:90vh;overflow:auto;border-radius:18px;padding:38px;box-shadow:12px 12px 0 var(--marker)}
.modal-close{position:absolute;right:16px;top:12px;border:0;background:none;font-size:32px;cursor:pointer;color:var(--ink)}
.lesson-kicker{font-family:'Space Mono',monospace;text-transform:uppercase;font-size:11px;color:#777}
.lesson-dialog h2{font-family:'Fredoka',sans-serif;font-size:38px;line-height:1.1;margin:9px 0 18px}
.lesson-text{font-size:17px;line-height:1.75}
.activity-box{background:#eef7f1;border-left:5px solid var(--green);padding:17px 20px;margin:25px 0}
.activity-box strong{font-family:'Fredoka',sans-serif}
.activity-box p{margin:7px 0 0;line-height:1.6}
.lesson-actions{display:flex;gap:10px;justify-content:flex-end;flex-wrap:wrap}
.lesson-actions button:disabled{opacity:.4;cursor:not-allowed}
.lesson-actions .is-done{background:var(--green);color:#fff}
body.modal-open{overflow:hidden}
@media(max-width:950px){
 .course-hero-grid,.course-layout{grid-template-columns:1fr}
 .course-sidebar{position:static}
 .lesson-grid{grid-template-columns:1fr 1fr}
}
@media(max-width:600px){
 .course-hero{padding:35px 0 50px}
 .course-hero-grid{gap:30px}
 .lesson-grid{grid-template-columns:1fr}
 .lesson-dialog{padding:28px 20px}
 .lesson-dialog h2{font-size:30px}
 .lesson-actions{justify-content:stretch}
 .lesson-actions button{flex:1}
}


/* Refuerzo de legibilidad para modo oscuro en la experiencia de cursos */
html[data-theme="dark"] .course-hero{background:#0B1711;color:#F5F7F3;}
html[data-theme="dark"] .course-content{background:#101813;color:#F1F3EE;}
html[data-theme="dark"] .course-progress-card,
html[data-theme="dark"] .course-intro-card,
html[data-theme="dark"] .lesson-card,
html[data-theme="dark"] .syllabus-card,
html[data-theme="dark"] .lesson-dialog{background:#202A24;color:#F1F3EE;border-color:#46554B;}
html[data-theme="dark"] .course-hero h1,
html[data-theme="dark"] .module-heading h2,
html[data-theme="dark"] .lesson-card h3,
html[data-theme="dark"] .syllabus-card h3,
html[data-theme="dark"] .syllabus-module-title strong,
html[data-theme="dark"] .lesson-dialog h2{color:#FFFFFF;}
html[data-theme="dark"] .course-description{color:#D7E4DB;}
html[data-theme="dark"] .lesson-card p,
html[data-theme="dark"] .course-progress-card p,
html[data-theme="dark"] .syllabus-lesson{color:#C7D1CA;}
html[data-theme="dark"] .lesson-module,
html[data-theme="dark"] .lesson-kicker,
html[data-theme="dark"] .module-heading>span{color:#AEBBB2;}
html[data-theme="dark"] .syllabus-module{border-color:#46554B;}
html[data-theme="dark"] .lesson-number{background:#34443A;color:#FFFFFF;}
html[data-theme="dark"] .progress-bar{background:#34443A;}
html[data-theme="dark"] .activity-box{background:#173126;color:#F1F3EE;}
html[data-theme="dark"] .modal-close{color:#FFFFFF;}

/* Contraste extra: textos secundarios claramente visibles en modo oscuro */
html[data-theme="dark"] .course-progress-card p,
html[data-theme="dark"] .lesson-card p,
html[data-theme="dark"] .syllabus-lesson,
html[data-theme="dark"] .lesson-text,
html[data-theme="dark"] .activity-box p {
  color:#F1F5F2;
}
html[data-theme="dark"] .lesson-module,
html[data-theme="dark"] .lesson-kicker,
html[data-theme="dark"] .module-heading>span {
  color:#E0E8E2;
}
html[data-theme="dark"] .syllabus-lesson:hover,
html[data-theme="dark"] .btn-lesson {
  color:#FFFFFF;
}
html[data-theme="dark"] .course-meta-large {
  color:#F5F7F5;
}
html[data-theme="dark"] .course-progress-card .progress-top {
  color:#FFFFFF;
}