/* ── RLabs LMS Frontend ─────────────────────────────────────── */
:root {
    --rlabs-primary:   #1a4fa0;
    --rlabs-accent:    #f59e0b;
    --rlabs-success:   #16a34a;
    --rlabs-danger:    #dc2626;
    --rlabs-text:      #1e293b;
    --rlabs-muted:     #64748b;
    --rlabs-border:    #e2e8f0;
    --rlabs-bg:        #f8fafc;
    --rlabs-card-bg:   #ffffff;
    --rlabs-radius:    8px;
    --rlabs-shadow:    0 1px 3px rgba(0,0,0,.08), 0 1px 2px rgba(0,0,0,.05);
}

.rlabs-lms *, .rlabs-lms *::before, .rlabs-lms *::after { box-sizing: border-box; }
.rlabs-lms { color: var(--rlabs-text); font-family: inherit; line-height: 1.6; }

/* ── Botones ── */
.rlabs-btn {
    display: inline-flex; align-items: center; justify-content: center; gap: 6px;
    padding: 10px 20px; border-radius: var(--rlabs-radius); font-weight: 600;
    font-size: 14px; cursor: pointer; text-decoration: none; border: 2px solid transparent;
    transition: all .15s ease; white-space: nowrap;
}
.rlabs-btn--primary  { background: var(--rlabs-primary); color: #fff; }
.rlabs-btn--primary:hover { background: #163d80; color: #fff; text-decoration: none; }
.rlabs-btn--outline  { background: transparent; color: var(--rlabs-primary); border-color: var(--rlabs-primary); }
.rlabs-btn--outline:hover { background: var(--rlabs-primary); color: #fff; }
.rlabs-btn--done     { background: var(--rlabs-success); color: #fff; border-color: var(--rlabs-success); }
.rlabs-btn--block    { display: flex; width: 100%; }
.rlabs-btn--lg       { padding: 14px 28px; font-size: 16px; }

/* ── Tarjetas ── */
.rlabs-card {
    background: var(--rlabs-card-bg); border: 1px solid var(--rlabs-border);
    border-radius: var(--rlabs-radius); padding: 24px; margin-bottom: 20px;
    box-shadow: var(--rlabs-shadow);
}
.rlabs-card h2 { margin: 0 0 16px; font-size: 18px; }
.rlabs-card--sticky { position: sticky; top: 80px; }

/* ── Pills ── */
.rlabs-pill {
    display: inline-block; padding: 2px 10px; border-radius: 20px;
    font-size: 12px; font-weight: 600; background: rgba(255,255,255,.2);
    color: #fff; border: 1px solid rgba(255,255,255,.3);
}
.rlabs-pill--basico     { background: #dcfce7; color: #166534; border-color: #86efac; }
.rlabs-pill--intermedio { background: #fef9c3; color: #854d0e; border-color: #fde047; }
.rlabs-pill--avanzado   { background: #fee2e2; color: #991b1b; border-color: #fca5a5; }
.rlabs-pill--free       { background: #d1fae5; color: #065f46; border-color: #6ee7b7; font-size: 10px; }

/* ── Progress bar ── */
.rlabs-progress-bar { background: var(--rlabs-border); border-radius: 4px; height: 8px; overflow: hidden; }
.rlabs-progress-bar__fill { background: var(--rlabs-primary); height: 100%; border-radius: 4px; transition: width .4s ease; }
.rlabs-progress-bar-wrap  { background: #f0f4ff; border: 1px solid #c7d2fe; border-radius: var(--rlabs-radius); padding: 16px; margin-bottom: 20px; }

/* ════════════════════════════════════════════════════════════
   PÁGINA DE CURSO
═══════════════════════════════════════════════════════════ */
.rlabs-course-hero {
    background: linear-gradient(135deg, var(--rlabs-primary) 0%, #0f2d6b 100%);
    background-size: cover; background-position: center;
    position: relative; color: #fff; margin-bottom: 0;
}
.rlabs-course-hero::before {
    content: ''; position: absolute; inset: 0;
    background: linear-gradient(135deg, rgba(26,79,160,.92) 0%, rgba(15,45,107,.88) 100%);
}
.rlabs-course-hero__inner {
    position: relative; max-width: 1200px; margin: 0 auto;
    padding: 48px 24px; z-index: 1;
}
.rlabs-course-hero__meta   { display: flex; gap: 8px; flex-wrap: wrap; margin-bottom: 16px; }
.rlabs-course-hero__title  { font-size: clamp(24px,4vw,40px); margin: 0 0 12px; color: #fff; line-height: 1.2; }
.rlabs-course-hero__desc   { font-size: 16px; opacity: .85; margin: 0 0 16px; max-width: 680px; }
.rlabs-course-hero__instructor { display: flex; align-items: center; gap: 8px; font-size: 14px; opacity: .85; margin: 0; }
.rlabs-course-hero__instructor img { border-radius: 50%; }

.rlabs-course-body {
    display: grid; grid-template-columns: 1fr 320px; gap: 24px;
    max-width: 1200px; margin: 0 auto; padding: 24px;
}
.rlabs-course-main { min-width: 0; }

/* Módulos */
.rlabs-module { border: 1px solid var(--rlabs-border); border-radius: var(--rlabs-radius); margin-bottom: 8px; overflow: hidden; }
.rlabs-module__header {
    display: flex; align-items: center; gap: 12px; padding: 14px 16px;
    background: var(--rlabs-bg); cursor: pointer; user-select: none;
}
.rlabs-module__header:hover { background: #f1f5f9; }
.rlabs-module__num {
    background: var(--rlabs-primary); color: #fff; border-radius: 50%;
    width: 28px; height: 28px; display: flex; align-items: center; justify-content: center;
    font-size: 12px; font-weight: 700; flex-shrink: 0;
}
.rlabs-module__title  { font-weight: 600; flex: 1; }
.rlabs-module__meta   { font-size: 12px; color: var(--rlabs-muted); }
.rlabs-module__toggle { font-size: 11px; color: var(--rlabs-muted); }
.rlabs-module__body   { border-top: 1px solid var(--rlabs-border); }

.rlabs-lesson-row {
    display: flex; align-items: center; gap: 10px; padding: 10px 16px;
    border-bottom: 1px solid var(--rlabs-border); font-size: 14px;
}
.rlabs-lesson-row:last-child { border-bottom: none; }
.rlabs-lesson-row--done  { background: #f0fdf4; }
.rlabs-lesson-row--quiz  { background: #f0f4ff; }
.rlabs-lesson-row__icon  { flex-shrink: 0; font-size: 16px; }
.rlabs-lesson-row__title { flex: 1; }
.rlabs-lesson-row__title a { color: var(--rlabs-text); text-decoration: none; }
.rlabs-lesson-row__title a:hover { color: var(--rlabs-primary); text-decoration: underline; }
.rlabs-lesson-row__dur   { font-size: 12px; color: var(--rlabs-muted); white-space: nowrap; }

/* Sidebar del curso */
.rlabs-enrolled-badge {
    background: #d1fae5; color: #065f46; border-radius: 6px;
    padding: 8px 12px; text-align: center; font-weight: 600; margin-bottom: 12px;
}
.rlabs-price { margin-bottom: 12px; }
.rlabs-price__current  { font-size: 28px; font-weight: 700; color: var(--rlabs-primary); }
.rlabs-price__original { font-size: 16px; color: var(--rlabs-muted); text-decoration: line-through; margin-right: 8px; }
.rlabs-course-features { list-style: none; padding: 0; margin: 16px 0 0; }
.rlabs-course-features li { padding: 6px 0; border-bottom: 1px solid var(--rlabs-border); font-size: 14px; }
.rlabs-course-features li:last-child { border-bottom: none; }

/* ════════════════════════════════════════════════════════════
   PÁGINA DE LECCIÓN
═══════════════════════════════════════════════════════════ */
.rlabs-lesson-topbar {
    display: flex; align-items: center; justify-content: space-between; gap: 16px;
    padding: 12px 24px; background: #fff; border-bottom: 1px solid var(--rlabs-border);
    position: sticky; top: 0; z-index: 100; box-shadow: 0 1px 3px rgba(0,0,0,.06);
}
.rlabs-lesson-topbar__back { color: var(--rlabs-primary); text-decoration: none; font-weight: 600; font-size: 14px; }
.rlabs-lesson-topbar__back:hover { text-decoration: underline; }
.rlabs-lesson-topbar__module { font-size: 13px; color: var(--rlabs-muted); }

.rlabs-lesson-wrap  { min-height: 100vh; background: var(--rlabs-bg); }
.rlabs-lesson-body  {
    display: grid; grid-template-columns: 1fr 280px; max-width: 1300px;
    margin: 0 auto; min-height: calc(100vh - 52px);
}
.rlabs-lesson-main  { min-width: 0; padding: 0; }

/* Video */
.rlabs-video-wrap { background: #000; }
.rlabs-video-wrap iframe,
.rlabs-video-wrap video {
    display: block; width: 100%; aspect-ratio: 16/9; max-height: 540px; border: none;
}

.rlabs-lesson-content { padding: 24px; }
.rlabs-lesson-title   { font-size: clamp(20px,3vw,28px); margin: 0 0 16px; }
.rlabs-lesson-text    { line-height: 1.8; }
.rlabs-lesson-text p  { margin-bottom: 1em; }

/* Adjuntos */
.rlabs-attachments { background: var(--rlabs-bg); border: 1px solid var(--rlabs-border); border-radius: var(--rlabs-radius); padding: 16px; margin: 24px 0; }
.rlabs-attachments h3 { margin: 0 0 10px; font-size: 15px; }
.rlabs-attachments ul { list-style: none; padding: 0; margin: 0; }
.rlabs-attachments li { padding: 6px 0; border-bottom: 1px solid var(--rlabs-border); }
.rlabs-attachments li:last-child { border-bottom: none; }
.rlabs-attachments a { color: var(--rlabs-primary); text-decoration: none; display: flex; align-items: center; gap: 6px; font-size: 14px; }
.rlabs-attachments a:hover { text-decoration: underline; }

/* Navegación de lección */
.rlabs-lesson-nav {
    display: flex; justify-content: space-between; align-items: center;
    gap: 12px; padding: 20px 0; border-top: 1px solid var(--rlabs-border); margin-top: 24px;
}

/* Sidebar del índice */
.rlabs-lesson-sidebar { border-left: 1px solid var(--rlabs-border); background: #fff; overflow-y: auto; max-height: calc(100vh - 52px); position: sticky; top: 52px; }
.rlabs-lesson-index__header { padding: 14px 16px; font-size: 13px; font-weight: 700; border-bottom: 1px solid var(--rlabs-border); background: var(--rlabs-bg); }
.rlabs-lesson-index__module { border-bottom: 1px solid var(--rlabs-border); }
.rlabs-lesson-index__mod-title { padding: 10px 16px 6px; font-size: 11px; font-weight: 700; text-transform: uppercase; letter-spacing: .5px; color: var(--rlabs-muted); }
.rlabs-lesson-index__item {
    display: flex; align-items: flex-start; gap: 8px; padding: 8px 16px;
    font-size: 13px; color: var(--rlabs-text); text-decoration: none; line-height: 1.4;
}
.rlabs-lesson-index__item:hover  { background: var(--rlabs-bg); }
.rlabs-lesson-index__item.active { background: #eff6ff; color: var(--rlabs-primary); font-weight: 600; border-left: 3px solid var(--rlabs-primary); }
.rlabs-lesson-index__item.done   { color: var(--rlabs-muted); }

/* Q&A */
.rlabs-qa { margin-top: 32px; border-top: 1px solid var(--rlabs-border); padding-top: 24px; }
.rlabs-qa h3 { margin: 0 0 16px; }
.rlabs-qa__form textarea {
    width: 100%; padding: 12px; border: 1px solid var(--rlabs-border); border-radius: var(--rlabs-radius);
    font-family: inherit; font-size: 14px; resize: vertical; margin-bottom: 8px;
}
.rlabs-qa__item { padding: 16px 0; border-bottom: 1px solid var(--rlabs-border); }
.rlabs-qa__item:last-child { border-bottom: none; }
.rlabs-qa__author { display: flex; align-items: center; gap: 8px; margin-bottom: 6px; font-size: 13px; }
.rlabs-qa__author img { border-radius: 50%; }
.rlabs-qa__date { color: var(--rlabs-muted); font-size: 12px; }
.rlabs-qa__badge { background: var(--rlabs-primary); color: #fff; font-size: 10px; padding: 1px 6px; border-radius: 3px; }
.rlabs-qa__content { font-size: 14px; line-height: 1.6; }
.rlabs-qa__reply { margin: 10px 0 0 32px; background: var(--rlabs-bg); border-radius: 6px; padding: 10px 14px; border-left: 3px solid var(--rlabs-primary); }

/* ════════════════════════════════════════════════════════════
   PÁGINA DE QUIZ
═══════════════════════════════════════════════════════════ */
.rlabs-quiz-wrap  { background: var(--rlabs-bg); min-height: 100vh; }
.rlabs-quiz-header { display: flex; align-items: center; justify-content: space-between; padding: 12px 24px; background: #fff; border-bottom: 1px solid var(--rlabs-border); font-size: 13px; color: var(--rlabs-muted); }
.rlabs-quiz-inner { max-width: 780px; margin: 0 auto; padding: 32px 24px; }
.rlabs-quiz-inner h1 { margin: 0 0 8px; font-size: 26px; }
.rlabs-quiz-desc  { color: var(--rlabs-muted); margin: 0 0 20px; }

.rlabs-quiz-meta {
    display: flex; flex-wrap: wrap; gap: 16px; padding: 14px 18px;
    background: #fff; border: 1px solid var(--rlabs-border); border-radius: var(--rlabs-radius);
    margin-bottom: 24px; font-size: 14px; font-weight: 500;
}

.rlabs-quiz-history { margin-bottom: 24px; }
.rlabs-quiz-history h3 { margin: 0 0 10px; font-size: 15px; }
.rlabs-table-sm { width: 100%; border-collapse: collapse; font-size: 13px; }
.rlabs-table-sm th, .rlabs-table-sm td { padding: 8px 12px; border: 1px solid var(--rlabs-border); text-align: left; }
.rlabs-table-sm th { background: var(--rlabs-bg); font-weight: 600; }

.rlabs-quiz-start { text-align: center; padding: 32px; background: #fff; border: 1px solid var(--rlabs-border); border-radius: var(--rlabs-radius); }

/* Timer */
.rlabs-timer-bar {
    display: flex; align-items: center; justify-content: space-between;
    padding: 12px 18px; background: #fff; border: 2px solid var(--rlabs-border);
    border-radius: var(--rlabs-radius); margin-bottom: 16px; font-weight: 600;
    position: sticky; top: 60px; z-index: 50;
}
.rlabs-timer { font-size: 24px; font-family: monospace; color: var(--rlabs-primary); }
.rlabs-timer--warning { color: var(--rlabs-danger) !important; animation: rlabs-pulse 1s infinite; }
@keyframes rlabs-pulse { 0%,100%{ opacity:1 } 50%{ opacity:.5 } }

.rlabs-quiz-warning {
    background: #fff7ed; border: 1px solid #fed7aa; color: #c2410c;
    padding: 10px 16px; border-radius: var(--rlabs-radius); margin-bottom: 12px; font-weight: 500;
}

/* Preguntas */
.rlabs-q-block {
    background: #fff; border: 1px solid var(--rlabs-border); border-radius: var(--rlabs-radius);
    padding: 20px; margin-bottom: 12px;
}
.rlabs-q-label { font-size: 15px; margin: 0 0 14px; line-height: 1.5; }
.rlabs-q-options { display: flex; flex-direction: column; gap: 8px; }
.rlabs-q-option {
    display: flex; align-items: center; gap: 10px; padding: 10px 14px;
    border: 1px solid var(--rlabs-border); border-radius: 6px; cursor: pointer;
    transition: background .1s, border-color .1s; font-size: 14px;
}
.rlabs-q-option:hover { background: #f0f4ff; border-color: var(--rlabs-primary); }
.rlabs-q-option input[type="radio"] { accent-color: var(--rlabs-primary); flex-shrink: 0; width: 16px; height: 16px; }
.rlabs-q-option:has(input:checked) { background: #eff6ff; border-color: var(--rlabs-primary); }

/* Resultado del quiz */
.rlabs-result {
    text-align: center; padding: 40px 24px; background: #fff;
    border: 2px solid var(--rlabs-border); border-radius: var(--rlabs-radius);
}
.rlabs-result--passed { border-color: var(--rlabs-success); background: #f0fdf4; }
.rlabs-result--failed { border-color: var(--rlabs-danger);  background: #fff5f5; }
.rlabs-result h3 { font-size: 24px; margin: 0 0 8px; }
.rlabs-score { font-size: 56px; font-weight: 700; margin: 8px 0; color: var(--rlabs-primary); }

/* ════════════════════════════════════════════════════════════
   DASHBOARD
═══════════════════════════════════════════════════════════ */
.rlabs-dashboard { max-width: 900px; margin: 0 auto; padding: 32px 24px; }
.rlabs-dashboard h2 { margin: 0 0 20px; }
.rlabs-courses-grid {
    display: grid; grid-template-columns: repeat(auto-fill, minmax(260px, 1fr)); gap: 20px;
}
.rlabs-course-card {
    background: #fff; border: 1px solid var(--rlabs-border); border-radius: var(--rlabs-radius);
    overflow: hidden; text-decoration: none; color: var(--rlabs-text);
    transition: box-shadow .2s, transform .2s;
}
.rlabs-course-card:hover { box-shadow: 0 4px 12px rgba(0,0,0,.12); transform: translateY(-2px); }
.rlabs-course-card__thumb { width: 100%; aspect-ratio: 16/9; object-fit: cover; background: #e2e8f0; }
.rlabs-course-card__body  { padding: 16px; }
.rlabs-course-card__title { font-weight: 600; margin: 0 0 8px; font-size: 15px; }
.rlabs-course-card__meta  { font-size: 12px; color: var(--rlabs-muted); margin-bottom: 10px; }

/* ── Responsive ─────────────────────────────────────────── */
@media (max-width: 900px) {
    .rlabs-course-body    { grid-template-columns: 1fr; padding: 16px; }
    .rlabs-lesson-body    { grid-template-columns: 1fr; }
    .rlabs-lesson-sidebar { display: none; }
    .rlabs-card--sticky   { position: static; }
}
@media (max-width: 600px) {
    .rlabs-course-hero__inner { padding: 32px 16px; }
    .rlabs-quiz-inner { padding: 20px 16px; }
    .rlabs-lesson-topbar { flex-wrap: wrap; gap: 8px; }
}