/* ═══════════════════════════════════════════════════════════
   SANTIEDUCADORES LMS — SISTEMA DE DISEÑO CORPORATIVO
   Versión: 2.0 | Hostinger Compatible
   Colores: Navy #344650 | Sky Blue #12B5EC | Medium Blue #625AAF
═══════════════════════════════════════════════════════════ */

@import url('https://fonts.googleapis.com/css2?family=Sora:wght@300;400;500;600;700;800&family=Lora:ital,wght@0,400;0,600;1,400&display=swap');

/* ───────────────────────────────
   VARIABLES DEL SISTEMA
─────────────────────────────── */
:root {
  /* Paleta Corporativa */
  --navy:        #344650;
  --navy-dark:   #243038;
  --navy-light:  #445868;
  --sky:         #12B5EC;
  --sky-light:   #4ECEF5;
  --sky-dark:    #0A8FBB;
  --medium:      #625AAF;
  --medium-light:#8178C8;
  --medium-dark: #473F8A;

  /* Neutros */
  --white:       #FFFFFF;
  --bg:          #F4F7FA;
  --bg2:         #EBF0F5;
  --surface:     #FFFFFF;
  --border:      #D8E2EA;
  --text:        #1C2B35;
  --text-2:      #4A6070;
  --text-muted:  #8A9BAA;

  /* Semánticos */
  --success:     #22C55E;
  --warning:     #F59E0B;
  --danger:      #EF4444;
  --info:        #12B5EC;

  /* Tipografía */
  --font-display:'Sora', sans-serif;
  --font-body:   'Sora', sans-serif;
  --font-serif:  'Lora', serif;

  /* Espaciado */
  --r-sm:  8px;
  --r:     14px;
  --r-lg:  20px;
  --r-xl:  28px;

  /* Sombras */
  --shadow-xs: 0 1px 3px rgba(52,70,80,.08);
  --shadow-sm: 0 4px 12px rgba(52,70,80,.10);
  --shadow:    0 8px 28px rgba(52,70,80,.14);
  --shadow-lg: 0 16px 48px rgba(52,70,80,.18);
  --shadow-sky:0 8px 28px rgba(18,181,236,.30);
  --shadow-med:0 8px 28px rgba(98,90,175,.30);

  /* Transiciones */
  --t: .22s cubic-bezier(.4,0,.2,1);
}

/* ───────────────────────────────
   RESET & BASE
─────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; font-size: 16px; }
body {
  font-family: var(--font-body);
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}
h1,h2,h3,h4,h5 { font-family: var(--font-display); line-height: 1.2; font-weight: 700; }
a { text-decoration: none; color: inherit; }
img { max-width: 100%; display: block; }
button { cursor: pointer; font-family: var(--font-body); }
input, select, textarea { font-family: var(--font-body); }
ul { list-style: none; }

/* ───────────────────────────────
   UTILIDADES
─────────────────────────────── */
.sr-only { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0,0,0,0); }
.text-sky    { color: var(--sky); }
.text-navy   { color: var(--navy); }
.text-medium { color: var(--medium); }
.text-muted  { color: var(--text-muted); }
.fw-600 { font-weight: 600; }
.fw-700 { font-weight: 700; }
.mt-auto { margin-top: auto; }
.flex { display: flex; }
.flex-col { flex-direction: column; }
.items-center { align-items: center; }
.gap-8  { gap: 8px; }
.gap-12 { gap: 12px; }
.gap-16 { gap: 16px; }

/* ───────────────────────────────
   BOTONES
─────────────────────────────── */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  padding: 12px 24px; border-radius: 50px; border: none;
  font-size: .9rem; font-weight: 600; letter-spacing: .02em;
  transition: all var(--t); cursor: pointer; white-space: nowrap;
}
.btn-sky {
  background: linear-gradient(135deg, var(--sky), var(--sky-light));
  color: #fff; box-shadow: var(--shadow-sky);
}
.btn-sky:hover { transform: translateY(-2px); box-shadow: 0 12px 36px rgba(18,181,236,.42); }
.btn-sky:active { transform: translateY(0); }

.btn-navy {
  background: linear-gradient(135deg, var(--navy), var(--navy-dark));
  color: #fff; box-shadow: var(--shadow);
}
.btn-navy:hover { transform: translateY(-2px); box-shadow: var(--shadow-lg); }

.btn-medium {
  background: linear-gradient(135deg, var(--medium), var(--medium-light));
  color: #fff; box-shadow: var(--shadow-med);
}
.btn-medium:hover { transform: translateY(-2px); box-shadow: 0 12px 36px rgba(98,90,175,.42); }

.btn-outline {
  background: transparent; border: 2px solid var(--border);
  color: var(--text-2);
}
.btn-outline:hover { border-color: var(--sky); color: var(--sky); }

.btn-ghost {
  background: transparent; color: var(--text-2);
  padding: 10px 18px;
}
.btn-ghost:hover { background: var(--bg2); color: var(--navy); }

.btn-sm { padding: 8px 18px; font-size: .8rem; }
.btn-lg { padding: 16px 36px; font-size: 1rem; }
.btn-block { width: 100%; }

.btn-simulator {
  background: linear-gradient(135deg, #FF6B35, #FF8E53);
  color: #fff;
  box-shadow: 0 8px 28px rgba(255,107,53,.35);
  font-size: 1rem;
  padding: 18px 40px;
}
.btn-simulator:hover {
  transform: translateY(-3px);
  box-shadow: 0 14px 40px rgba(255,107,53,.48);
}

/* ───────────────────────────────
   HEADER GLOBAL
─────────────────────────────── */
.site-header {
  background: var(--navy);
  position: sticky; top: 0; z-index: 100;
  border-bottom: 1px solid rgba(255,255,255,.08);
  box-shadow: 0 2px 20px rgba(0,0,0,.2);
}
.header-inner {
  max-width: 1280px; margin: 0 auto; padding: 0 24px;
  height: 68px; display: flex; align-items: center; gap: 20px;
}
.logo-wrap {
  display: flex; align-items: center; gap: 12px; flex-shrink: 0;
}
.logo-icon {
  width: 42px; height: 42px; border-radius: 12px;
  background: linear-gradient(135deg, var(--sky), var(--medium));
  display: flex; align-items: center; justify-content: center;
  font-size: 1.3rem;
}
.logo-text { font-family: var(--font-display); font-weight: 800; font-size: 1.05rem; color: #fff; line-height: 1.1; }
.logo-text span { display: block; font-size: .62rem; font-weight: 400; color: var(--sky-light); letter-spacing: .12em; text-transform: uppercase; }

.header-nav { display: flex; align-items: center; gap: 4px; margin-left: auto; }
.header-nav a {
  padding: 8px 14px; border-radius: var(--r-sm); font-size: .85rem; font-weight: 500;
  color: rgba(255,255,255,.65); transition: all var(--t);
}
.header-nav a:hover, .header-nav a.active { color: #fff; background: rgba(255,255,255,.1); }

.header-avatar {
  width: 38px; height: 38px; border-radius: 50%; margin-left: 12px;
  background: linear-gradient(135deg, var(--sky), var(--medium));
  display: flex; align-items: center; justify-content: center;
  font-weight: 700; color: #fff; font-size: .9rem; cursor: pointer;
  flex-shrink: 0;
}
.hamburger { display: none; background: none; border: none; color: #fff; font-size: 1.4rem; padding: 8px; }

/* ───────────────────────────────
   HERO — INDEX
─────────────────────────────── */
.hero {
  background: linear-gradient(145deg, var(--navy-dark) 0%, var(--navy) 50%, #2A3E52 100%);
  padding: 80px 24px 100px;
  position: relative; overflow: hidden;
}
.hero::before {
  content: '';
  position: absolute; top: -120px; right: -100px;
  width: 600px; height: 600px; border-radius: 50%;
  background: radial-gradient(circle, rgba(18,181,236,.15) 0%, transparent 65%);
  pointer-events: none;
}
.hero::after {
  content: '';
  position: absolute; bottom: -80px; left: -60px;
  width: 400px; height: 400px; border-radius: 50%;
  background: radial-gradient(circle, rgba(98,90,175,.18) 0%, transparent 65%);
  pointer-events: none;
}
/* patrón de puntos sutil */
.hero-pattern {
  position: absolute; inset: 0; opacity: .04;
  background-image: radial-gradient(circle, #fff 1.5px, transparent 1.5px);
  background-size: 28px 28px;
  pointer-events: none;
}
.hero-content {
  max-width: 860px; margin: 0 auto; text-align: center; position: relative; z-index: 1;
}
.hero-badge {
  display: inline-flex; align-items: center; gap: 8px;
  background: rgba(18,181,236,.15); border: 1px solid rgba(18,181,236,.3);
  color: var(--sky-light); font-size: .78rem; font-weight: 600;
  letter-spacing: .1em; text-transform: uppercase;
  padding: 6px 16px; border-radius: 50px; margin-bottom: 24px;
}
.hero h1 {
  font-size: clamp(2rem, 5vw, 3.2rem);
  color: #fff; margin-bottom: 18px; line-height: 1.15;
}
.hero h1 em { color: var(--sky); font-style: normal; }
.hero h1 strong { color: var(--sky-light); }
.hero p {
  font-size: clamp(.9rem, 2vw, 1.1rem);
  color: rgba(255,255,255,.6); margin-bottom: 40px;
  max-width: 580px; margin-left: auto; margin-right: auto; line-height: 1.75;
}
.hero-stats {
  display: flex; justify-content: center; gap: 48px;
  margin-bottom: 48px; flex-wrap: wrap;
}
.hero-stat strong {
  display: block; font-family: var(--font-display);
  font-size: 2.2rem; font-weight: 800; color: var(--sky);
}
.hero-stat span { font-size: .78rem; color: rgba(255,255,255,.45); text-transform: uppercase; letter-spacing: .08em; }

/* ───────────────────────────────
   BUSCADOR DE PERFIL
─────────────────────────────── */
.search-bar {
  background: rgba(255,255,255,.08);
  border: 1.5px solid rgba(255,255,255,.15);
  border-radius: 50px; padding: 6px 6px 6px 22px;
  display: flex; align-items: center; gap: 12px;
  max-width: 480px; margin: 0 auto 56px; backdrop-filter: blur(8px);
}
.search-bar input {
  flex: 1; background: none; border: none; outline: none;
  color: #fff; font-size: .95rem;
}
.search-bar input::placeholder { color: rgba(255,255,255,.4); }
.search-bar button { flex-shrink: 0; }

/* ───────────────────────────────
   SECCIÓN PERFILES
─────────────────────────────── */
.section { padding: 64px 24px; }
.section-inner { max-width: 1280px; margin: 0 auto; }
.section-header { text-align: center; margin-bottom: 48px; }
.section-header .eyebrow {
  font-size: .72rem; font-weight: 700; letter-spacing: .15em;
  text-transform: uppercase; color: var(--sky);
  display: block; margin-bottom: 10px;
}
.section-header h2 { font-size: clamp(1.6rem, 3vw, 2.2rem); color: var(--navy); margin-bottom: 12px; }
.section-header p { color: var(--text-2); font-size: .95rem; max-width: 520px; margin: 0 auto; }

/* TABS DE NIVEL */
.level-tabs {
  display: flex; gap: 8px; flex-wrap: wrap;
  justify-content: center; margin-bottom: 40px;
}
.level-tab {
  padding: 9px 20px; border-radius: 50px; border: 2px solid var(--border);
  background: #fff; font-size: .82rem; font-weight: 600;
  color: var(--text-2); cursor: pointer; transition: all var(--t);
}
.level-tab:hover { border-color: var(--sky); color: var(--sky); }
.level-tab.active { background: var(--sky); border-color: var(--sky); color: #fff; box-shadow: var(--shadow-sky); }

/* GRID DE PERFILES */
.profiles-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 24px;
}
.profile-card {
  background: #fff; border-radius: var(--r-xl); border: 1.5px solid var(--border);
  padding: 28px; display: flex; flex-direction: column;
  transition: box-shadow var(--t), transform var(--t), border-color var(--t);
  cursor: pointer; position: relative; overflow: hidden;
}
.profile-card::before {
  content: '';
  position: absolute; top: 0; left: 0; right: 0; height: 4px;
  background: linear-gradient(90deg, var(--sky), var(--medium));
  transform: scaleX(0); transform-origin: left;
  transition: transform var(--t);
}
.profile-card:hover { box-shadow: var(--shadow-lg); transform: translateY(-5px); border-color: var(--sky); }
.profile-card:hover::before { transform: scaleX(1); }

.profile-icon {
  width: 56px; height: 56px; border-radius: 16px; margin-bottom: 18px;
  display: flex; align-items: center; justify-content: center; font-size: 1.6rem;
  background: linear-gradient(135deg, rgba(18,181,236,.12), rgba(98,90,175,.12));
  flex-shrink: 0;
}
.profile-level {
  font-size: .65rem; font-weight: 700; letter-spacing: .1em; text-transform: uppercase;
  padding: 3px 10px; border-radius: 20px; display: inline-block; margin-bottom: 10px;
}
.profile-level.inicial    { background: rgba(34,197,94,.1);  color: #16A34A; }
.profile-level.elemental  { background: rgba(18,181,236,.1); color: var(--sky-dark); }
.profile-level.media      { background: rgba(245,158,11,.1); color: #B45309; }
.profile-level.superior   { background: rgba(98,90,175,.1);  color: var(--medium); }
.profile-level.bachillerato{ background: rgba(52,70,80,.08); color: var(--navy); }

.profile-card h3 { font-size: 1rem; font-weight: 700; color: var(--navy); margin-bottom: 8px; line-height: 1.35; }
.profile-card p  { font-size: .82rem; color: var(--text-2); line-height: 1.6; flex: 1; }
.profile-meta {
  display: flex; align-items: center; gap: 16px;
  margin-top: 20px; padding-top: 16px; border-top: 1px solid var(--bg2);
}
.profile-meta span { font-size: .75rem; color: var(--text-muted); display: flex; align-items: center; gap: 5px; }
.profile-cta {
  margin-top: 16px; padding: 10px;
  background: linear-gradient(135deg, rgba(18,181,236,.08), rgba(98,90,175,.08));
  border: 1.5px solid var(--border); border-radius: 10px;
  text-align: center; font-size: .82rem; font-weight: 600;
  color: var(--navy); transition: all var(--t);
}
.profile-card:hover .profile-cta {
  background: linear-gradient(135deg, var(--sky), var(--medium));
  border-color: transparent; color: #fff;
}

/* ───────────────────────────────
   LAYOUT DEL CURSO
─────────────────────────────── */
.course-layout {
  display: grid;
  grid-template-columns: 300px 1fr;
  min-height: calc(100vh - 68px);
}

/* SIDEBAR DEL CURSO */
.course-sidebar {
  background: var(--navy-dark);
  display: flex; flex-direction: column;
  position: sticky; top: 68px; height: calc(100vh - 68px);
  overflow-y: auto;
}
.course-sidebar::-webkit-scrollbar { width: 4px; }
.course-sidebar::-webkit-scrollbar-track { background: transparent; }
.course-sidebar::-webkit-scrollbar-thumb { background: rgba(255,255,255,.15); border-radius: 2px; }

.sidebar-course-info {
  padding: 24px 20px; border-bottom: 1px solid rgba(255,255,255,.07);
}
.sidebar-course-info .course-label {
  font-size: .62rem; font-weight: 700; letter-spacing: .12em; text-transform: uppercase;
  color: var(--sky-light); display: block; margin-bottom: 6px;
}
.sidebar-course-info h2 { font-size: .95rem; color: #fff; font-weight: 700; line-height: 1.35; margin-bottom: 14px; }

/* PROGRESO GLOBAL */
.global-progress { margin-top: 4px; }
.global-progress .prog-label {
  display: flex; justify-content: space-between;
  font-size: .72rem; color: rgba(255,255,255,.45); margin-bottom: 6px;
}
.prog-track { height: 6px; background: rgba(255,255,255,.1); border-radius: 3px; overflow: hidden; }
.prog-fill {
  height: 100%; border-radius: 3px;
  background: linear-gradient(90deg, var(--sky), var(--sky-light));
  transition: width .8s cubic-bezier(.4,0,.2,1);
}

/* MÓDULOS EN SIDEBAR */
.sidebar-modules { padding: 12px 0; flex: 1; }
.module-group { margin-bottom: 4px; }
.module-group-header {
  display: flex; align-items: center; gap: 10px;
  padding: 12px 20px; cursor: pointer; transition: background var(--t);
}
.module-group-header:hover { background: rgba(255,255,255,.05); }
.mod-num {
  width: 26px; height: 26px; border-radius: 50%; flex-shrink: 0;
  display: flex; align-items: center; justify-content: center;
  font-size: .72rem; font-weight: 700;
}
.mod-num.done    { background: var(--success); color: #fff; }
.mod-num.active  { background: var(--sky); color: #fff; }
.mod-num.locked  { background: rgba(255,255,255,.1); color: rgba(255,255,255,.35); }
.mod-num.pending { background: rgba(255,255,255,.15); color: rgba(255,255,255,.55); }

.module-group-header .mod-title { flex: 1; }
.module-group-header .mod-title strong {
  display: block; font-size: .82rem; color: rgba(255,255,255,.8); font-weight: 600;
}
.module-group-header .mod-title span { font-size: .68rem; color: rgba(255,255,255,.35); }
.mod-arrow { color: rgba(255,255,255,.3); font-size: .75rem; transition: transform var(--t); }
.module-group.open .mod-arrow { transform: rotate(180deg); }

.lesson-items { display: none; padding: 4px 0 8px; }
.module-group.open .lesson-items { display: block; }
.lesson-item {
  display: flex; align-items: center; gap: 10px;
  padding: 9px 20px 9px 56px; cursor: pointer;
  transition: background var(--t); border-left: 3px solid transparent;
}
.lesson-item:hover { background: rgba(255,255,255,.05); }
.lesson-item.active { background: rgba(18,181,236,.12); border-left-color: var(--sky); }
.lesson-dot {
  width: 20px; height: 20px; border-radius: 50%; flex-shrink: 0;
  display: flex; align-items: center; justify-content: center; font-size: .65rem;
}
.lesson-dot.done    { background: rgba(34,197,94,.2);  color: var(--success); }
.lesson-dot.active  { background: rgba(18,181,236,.2); color: var(--sky); }
.lesson-dot.locked  { background: rgba(255,255,255,.07); color: rgba(255,255,255,.25); }
.lesson-item p { font-size: .8rem; color: rgba(255,255,255,.55); line-height: 1.35; flex: 1; }
.lesson-item.active p { color: #fff; }
.lesson-type { font-size: .6rem; color: rgba(255,255,255,.25); }

/* SIMULADOR CTA SIDEBAR */
.sidebar-sim {
  padding: 16px 20px; border-top: 1px solid rgba(255,255,255,.07);
}
.sidebar-sim a {
  display: flex; align-items: center; gap: 10px;
  background: linear-gradient(135deg, rgba(255,107,53,.15), rgba(255,142,83,.1));
  border: 1px solid rgba(255,107,53,.3); border-radius: var(--r);
  padding: 12px 16px; color: #fff; font-size: .82rem; font-weight: 600;
  transition: all var(--t);
}
.sidebar-sim a:hover { background: linear-gradient(135deg, rgba(255,107,53,.3), rgba(255,142,83,.2)); }
.sidebar-sim .sim-icon { font-size: 1.2rem; }
.sidebar-sim .sim-text strong { display: block; font-size: .85rem; }
.sidebar-sim .sim-text span { font-size: .7rem; color: rgba(255,255,255,.5); }

/* CONTENIDO PRINCIPAL DEL CURSO */
.course-main {
  background: var(--bg);
  min-height: calc(100vh - 68px);
}

/* TOPBAR DEL CURSO */
.course-topbar {
  background: #fff; border-bottom: 1px solid var(--border);
  padding: 0 32px; height: 60px;
  display: flex; align-items: center; gap: 16px;
  position: sticky; top: 68px; z-index: 10;
}
.breadcrumb {
  display: flex; align-items: center; gap: 8px;
  font-size: .82rem; color: var(--text-muted);
}
.breadcrumb a { color: var(--text-2); }
.breadcrumb a:hover { color: var(--sky); }
.breadcrumb span { color: var(--text-muted); }
.module-progress-bar {
  height: 3px; background: var(--sky);
  position: absolute; bottom: 0; left: 0;
  transition: width 1s ease;
}

.course-topbar .lesson-nav { margin-left: auto; display: flex; gap: 8px; }

/* ÁREA DE LECCIÓN */
.lesson-area { padding: 36px 40px; max-width: 980px; }

.lesson-header { margin-bottom: 32px; }
.lesson-header .module-tag {
  font-size: .68rem; font-weight: 700; letter-spacing: .1em; text-transform: uppercase;
  padding: 4px 12px; border-radius: 20px; display: inline-block; margin-bottom: 12px;
}
.module-tag.dim1 { background: rgba(18,181,236,.12);  color: var(--sky-dark); }
.module-tag.dim2 { background: rgba(34,197,94,.12);   color: #16A34A; }
.module-tag.dim3 { background: rgba(245,158,11,.12);  color: #B45309; }
.module-tag.dim4 { background: rgba(98,90,175,.12);   color: var(--medium); }

.lesson-header h1 { font-size: clamp(1.4rem, 2.5vw, 1.9rem); color: var(--navy); margin-bottom: 10px; }
.lesson-header p  { color: var(--text-2); font-size: .95rem; line-height: 1.7; }
.lesson-meta { display: flex; gap: 20px; margin-top: 14px; flex-wrap: wrap; }
.lesson-meta span { font-size: .78rem; color: var(--text-muted); display: flex; align-items: center; gap: 6px; }

/* ───────────────────────────────
   COMPONENTES DE CONTENIDO
─────────────────────────────── */

/* VIDEO */
.video-container {
  background: var(--navy-dark); border-radius: var(--r-lg); overflow: hidden;
  margin-bottom: 32px; box-shadow: var(--shadow-lg); position: relative;
  aspect-ratio: 16/9;
}
.video-container iframe { width: 100%; height: 100%; border: none; display: block; }
.video-placeholder {
  width: 100%; height: 100%; display: flex; flex-direction: column;
  align-items: center; justify-content: center; gap: 16px;
  background: linear-gradient(135deg, var(--navy-dark), #1A3A50);
  color: rgba(255,255,255,.6); font-size: .9rem;
}
.video-placeholder .play-btn {
  width: 72px; height: 72px; border-radius: 50%;
  background: linear-gradient(135deg, var(--sky), var(--sky-light));
  display: flex; align-items: center; justify-content: center;
  font-size: 1.6rem; cursor: pointer;
  box-shadow: 0 8px 28px rgba(18,181,236,.4);
  transition: transform var(--t), box-shadow var(--t);
}
.video-placeholder .play-btn:hover { transform: scale(1.1); box-shadow: 0 12px 40px rgba(18,181,236,.55); }
.video-caption {
  background: #fff; border-radius: 0 0 var(--r-lg) var(--r-lg);
  padding: 14px 20px; font-size: .82rem; color: var(--text-2);
  display: flex; align-items: center; gap: 10px; border-top: 1px solid var(--border);
}

/* PDF VIEWER */
.pdf-viewer {
  background: #fff; border-radius: var(--r-lg); overflow: hidden;
  border: 1.5px solid var(--border); margin-bottom: 32px; box-shadow: var(--shadow-sm);
}
.pdf-toolbar {
  background: var(--navy); padding: 12px 20px;
  display: flex; align-items: center; gap: 12px;
}
.pdf-toolbar span { color: rgba(255,255,255,.7); font-size: .82rem; flex: 1; }
.pdf-toolbar a {
  background: rgba(255,255,255,.12); color: #fff; padding: 6px 14px;
  border-radius: var(--r-sm); font-size: .75rem; font-weight: 600;
  transition: background var(--t); display: flex; align-items: center; gap: 6px;
}
.pdf-toolbar a:hover { background: rgba(255,255,255,.22); }
.pdf-frame { width: 100%; height: 600px; border: none; display: block; }

/* TEXTO / LECCIÓN ESCRITA */
.lesson-text-block {
  background: #fff; border-radius: var(--r-lg); padding: 36px;
  border: 1.5px solid var(--border); margin-bottom: 32px; box-shadow: var(--shadow-xs);
}
.lesson-text-block h2 {
  font-size: 1.3rem; color: var(--navy); margin-bottom: 16px;
  padding-bottom: 12px; border-bottom: 2px solid var(--bg2);
}
.lesson-text-block h3 { font-size: 1.05rem; color: var(--navy); margin: 24px 0 10px; }
.lesson-text-block p  { color: var(--text-2); line-height: 1.85; margin-bottom: 16px; font-size: .95rem; }
.lesson-text-block ul { padding-left: 20px; list-style: none; margin-bottom: 16px; }
.lesson-text-block ul li {
  position: relative; padding-left: 20px; color: var(--text-2);
  font-size: .95rem; line-height: 1.8; margin-bottom: 6px;
}
.lesson-text-block ul li::before {
  content: ''; position: absolute; left: 0; top: 10px;
  width: 8px; height: 8px; border-radius: 50%;
  background: linear-gradient(135deg, var(--sky), var(--medium));
}
.lesson-text-block blockquote {
  border-left: 4px solid var(--sky); padding: 14px 20px;
  background: rgba(18,181,236,.06); border-radius: 0 var(--r-sm) var(--r-sm) 0;
  margin: 20px 0; font-family: var(--font-serif); font-style: italic;
  color: var(--navy); font-size: 1rem; line-height: 1.7;
}
.info-box {
  background: rgba(18,181,236,.08); border: 1.5px solid rgba(18,181,236,.2);
  border-radius: var(--r); padding: 16px 20px; margin: 20px 0;
  display: flex; gap: 14px; align-items: flex-start;
}
.info-box .icon { font-size: 1.2rem; flex-shrink: 0; margin-top: 1px; }
.info-box p { margin: 0; font-size: .88rem; line-height: 1.65; color: var(--navy); }

/* ───────────────────────────────
   SISTEMA DE EVALUACIÓN
─────────────────────────────── */
.exam-wrapper {
  background: #fff; border-radius: var(--r-xl); border: 1.5px solid var(--border);
  overflow: hidden; box-shadow: var(--shadow); margin-bottom: 32px;
}

/* HEADER EXAMEN */
.exam-header {
  background: linear-gradient(135deg, var(--navy-dark), var(--navy));
  padding: 28px 32px; display: flex; align-items: center; gap: 20px; flex-wrap: wrap;
}
.exam-header h2 { color: #fff; font-size: 1.15rem; flex: 1; }
.exam-timer {
  display: flex; align-items: center; gap: 10px;
  background: rgba(255,255,255,.1); border: 1px solid rgba(255,255,255,.15);
  border-radius: var(--r); padding: 10px 18px;
}
.exam-timer .timer-icon { font-size: 1.1rem; }
.exam-timer #timer-display {
  font-family: var(--font-display); font-size: 1.4rem; font-weight: 800;
  color: var(--sky-light); letter-spacing: .04em; min-width: 70px;
}
.exam-timer.warning #timer-display { color: #FCA5A5; animation: pulse .8s infinite; }
@keyframes pulse { 0%,100%{opacity:1} 50%{opacity:.5} }

/* BARRA DE PROGRESO EXAMEN */
.exam-progress-bar {
  height: 5px; background: var(--bg2); position: relative;
}
.exam-progress-fill {
  height: 100%; background: linear-gradient(90deg, var(--sky), var(--medium));
  transition: width .4s ease;
}

/* NAVEGADOR DE PREGUNTAS */
.question-navigator {
  padding: 16px 32px; border-bottom: 1px solid var(--border);
  display: flex; align-items: center; gap: 8px; flex-wrap: wrap;
  background: var(--bg);
}
.q-nav-label { font-size: .72rem; font-weight: 600; text-transform: uppercase; letter-spacing: .08em; color: var(--text-muted); margin-right: 8px; }
.q-num {
  width: 34px; height: 34px; border-radius: var(--r-sm); border: 2px solid var(--border);
  background: #fff; font-size: .8rem; font-weight: 600; color: var(--text-2);
  cursor: pointer; transition: all var(--t); display: flex; align-items: center; justify-content: center;
}
.q-num:hover { border-color: var(--sky); color: var(--sky); }
.q-num.current { background: var(--sky); border-color: var(--sky); color: #fff; }
.q-num.answered { background: rgba(34,197,94,.1); border-color: var(--success); color: var(--success); }
.q-num.flagged  { background: rgba(245,158,11,.1); border-color: var(--warning); color: var(--warning); }

/* CUERPO DEL EXAMEN */
.exam-body { padding: 36px 40px; }

.question-counter {
  font-size: .78rem; font-weight: 600; letter-spacing: .1em; text-transform: uppercase;
  color: var(--text-muted); margin-bottom: 14px; display: flex; align-items: center; gap: 10px;
}
.question-counter::after {
  content: ''; flex: 1; height: 1px; background: var(--border);
}

.question-text {
  font-size: 1.05rem; color: var(--navy); line-height: 1.75;
  margin-bottom: 28px; font-weight: 500;
}
.question-hint {
  font-size: .8rem; color: var(--text-muted); margin-bottom: 20px;
  display: flex; align-items: center; gap: 6px;
}

/* OPCIONES */
.options-grid { display: flex; flex-direction: column; gap: 12px; margin-bottom: 32px; }
.option-item {
  display: flex; align-items: flex-start; gap: 14px;
  padding: 16px 20px; border-radius: var(--r); border: 2px solid var(--border);
  background: #fff; cursor: pointer; transition: all var(--t); position: relative;
}
.option-item:hover { border-color: var(--sky); background: rgba(18,181,236,.04); }
.option-item.selected { border-color: var(--sky); background: rgba(18,181,236,.08); }
.option-item.correct  { border-color: var(--success); background: rgba(34,197,94,.08); }
.option-item.incorrect { border-color: var(--danger); background: rgba(239,68,68,.08); }

.option-letter {
  width: 32px; height: 32px; border-radius: 50%; flex-shrink: 0;
  display: flex; align-items: center; justify-content: center;
  font-size: .8rem; font-weight: 700; border: 2px solid var(--border);
  color: var(--text-2); transition: all var(--t); margin-top: 1px;
}
.option-item:hover .option-letter  { border-color: var(--sky); color: var(--sky); }
.option-item.selected .option-letter { background: var(--sky); border-color: var(--sky); color: #fff; }
.option-item.correct  .option-letter { background: var(--success); border-color: var(--success); color: #fff; }
.option-item.incorrect .option-letter { background: var(--danger); border-color: var(--danger); color: #fff; }

.option-text { font-size: .92rem; color: var(--text); line-height: 1.6; flex: 1; padding-top: 4px; }
.option-check { margin-left: auto; font-size: 1.1rem; opacity: 0; transition: opacity var(--t); }
.option-item.correct  .option-check { opacity: 1; color: var(--success); }
.option-item.incorrect .option-check { opacity: 1; color: var(--danger); }

/* EXPLICACIÓN */
.explanation-box {
  background: rgba(34,197,94,.07); border: 1.5px solid rgba(34,197,94,.2);
  border-radius: var(--r); padding: 16px 20px; margin-top: -16px; margin-bottom: 24px;
  display: none;
}
.explanation-box.show { display: block; }
.explanation-box .exp-label {
  font-size: .72rem; font-weight: 700; text-transform: uppercase; letter-spacing: .08em;
  color: var(--success); margin-bottom: 6px;
}
.explanation-box p { font-size: .88rem; color: var(--navy); line-height: 1.65; }

/* NAVEGACIÓN DEL EXAMEN */
.exam-nav {
  display: flex; align-items: center; justify-content: space-between;
  padding: 20px 40px; border-top: 1px solid var(--border); background: var(--bg);
  flex-wrap: wrap; gap: 12px;
}
.exam-nav .flag-btn {
  background: none; border: 1.5px solid var(--border); border-radius: var(--r-sm);
  padding: 9px 16px; font-size: .8rem; color: var(--text-muted); display: flex; align-items: center; gap: 6px;
  transition: all var(--t);
}
.exam-nav .flag-btn:hover { border-color: var(--warning); color: var(--warning); }
.exam-nav .flag-btn.flagged { border-color: var(--warning); color: var(--warning); background: rgba(245,158,11,.08); }

/* PANTALLA DE RESULTADOS */
.results-screen {
  padding: 48px 40px; text-align: center; display: none;
}
.results-screen.show { display: block; }
.result-score-circle {
  width: 160px; height: 160px; border-radius: 50%; margin: 0 auto 28px;
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  position: relative;
}
.result-score-circle svg { position: absolute; top: 0; left: 0; transform: rotate(-90deg); }
.result-score-inner { position: relative; z-index: 1; }
.result-score-inner .score-num {
  font-family: var(--font-display); font-size: 2.8rem; font-weight: 800; line-height: 1;
  color: var(--navy);
}
.result-score-inner .score-label { font-size: .75rem; color: var(--text-muted); text-transform: uppercase; letter-spacing: .08em; }

.results-screen h2 { font-size: 1.6rem; color: var(--navy); margin-bottom: 10px; }
.results-screen p  { color: var(--text-2); margin-bottom: 28px; }

.result-stats {
  display: flex; justify-content: center; gap: 32px; margin-bottom: 36px; flex-wrap: wrap;
}
.result-stat {
  background: var(--bg); border-radius: var(--r); padding: 16px 24px; text-align: center;
  border: 1.5px solid var(--border); min-width: 120px;
}
.result-stat strong { display: block; font-size: 1.8rem; font-family: var(--font-display); font-weight: 800; }
.result-stat span { font-size: .75rem; color: var(--text-muted); text-transform: uppercase; letter-spacing: .06em; }
.result-stat.correct strong  { color: var(--success); }
.result-stat.incorrect strong { color: var(--danger); }
.result-stat.time strong     { color: var(--sky); }

/* ───────────────────────────────
   BANNER SIMULADOR
─────────────────────────────── */
.simulator-banner {
  background: linear-gradient(135deg, var(--navy-dark) 0%, #1A2E3D 50%, var(--navy) 100%);
  border-radius: var(--r-xl); padding: 48px; margin: 32px 0;
  display: flex; align-items: center; gap: 36px;
  position: relative; overflow: hidden;
}
.simulator-banner::before {
  content: '';
  position: absolute; right: -60px; top: -60px;
  width: 300px; height: 300px; border-radius: 50%;
  background: radial-gradient(circle, rgba(255,107,53,.2) 0%, transparent 65%);
}
.sim-icon-big { font-size: 4rem; flex-shrink: 0; position: relative; z-index: 1; }
.sim-text { flex: 1; position: relative; z-index: 1; }
.sim-text .eyebrow {
  font-size: .68rem; font-weight: 700; letter-spacing: .12em; text-transform: uppercase;
  color: rgba(255,107,53,.8); display: block; margin-bottom: 8px;
}
.sim-text h2 { font-size: 1.5rem; color: #fff; margin-bottom: 10px; }
.sim-text p   { color: rgba(255,255,255,.55); font-size: .9rem; line-height: 1.65; }
.sim-cta { position: relative; z-index: 1; flex-shrink: 0; }

/* ───────────────────────────────
   FOOTER
─────────────────────────────── */
.site-footer {
  background: var(--navy-dark); padding: 48px 24px 24px;
  border-top: 1px solid rgba(255,255,255,.07);
}
.footer-inner { max-width: 1280px; margin: 0 auto; }
.footer-top {
  display: grid; grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 48px; margin-bottom: 40px;
}
.footer-brand .logo-text { color: #fff; margin-top: 12px; }
.footer-brand p { color: rgba(255,255,255,.4); font-size: .85rem; line-height: 1.7; margin-top: 12px; }
.footer-col h4 { font-size: .82rem; font-weight: 700; color: rgba(255,255,255,.6); text-transform: uppercase; letter-spacing: .1em; margin-bottom: 16px; }
.footer-col a { display: block; color: rgba(255,255,255,.4); font-size: .85rem; margin-bottom: 10px; transition: color var(--t); }
.footer-col a:hover { color: var(--sky); }
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,.07); padding-top: 24px;
  display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; gap: 12px;
}
.footer-bottom p { color: rgba(255,255,255,.3); font-size: .78rem; }

/* ───────────────────────────────
   TOASTS / NOTIFICACIONES
─────────────────────────────── */
.toast-container {
  position: fixed; top: 90px; right: 24px; z-index: 500;
  display: flex; flex-direction: column; gap: 10px;
}
.toast {
  background: var(--navy); color: #fff; border-radius: var(--r);
  padding: 14px 20px; font-size: .88rem; box-shadow: var(--shadow-lg);
  display: flex; align-items: center; gap: 12px;
  animation: slideIn .3s ease;
  border-left: 4px solid var(--sky);
}
.toast.success { border-left-color: var(--success); }
.toast.error   { border-left-color: var(--danger); }
@keyframes slideIn { from{transform:translateX(120%);opacity:0} to{transform:translateX(0);opacity:1} }

/* ───────────────────────────────
   RESPONSIVE
─────────────────────────────── */
@media(max-width: 1100px) {
  .course-layout { grid-template-columns: 260px 1fr; }
}

@media(max-width: 900px) {
  .course-layout { grid-template-columns: 1fr; }
  .course-sidebar { position: fixed; left: -300px; top: 0; height: 100vh; z-index: 200; transition: left var(--t); width: 290px; }
  .course-sidebar.open { left: 0; box-shadow: var(--shadow-lg); }
  .sidebar-overlay { display: none; position: fixed; inset: 0; background: rgba(0,0,0,.5); z-index: 199; }
  .sidebar-overlay.show { display: block; }
  .hamburger { display: flex; }
  .course-topbar { top: 68px; padding: 0 20px; }
  .lesson-area { padding: 24px 20px; }
  .exam-body { padding: 24px 20px; }
  .exam-nav  { padding: 16px 20px; }
  .exam-header { padding: 20px; }
  .footer-top { grid-template-columns: 1fr 1fr; gap: 32px; }
  .simulator-banner { flex-direction: column; text-align: center; padding: 36px 24px; }
}

@media(max-width: 640px) {
  .header-nav { display: none; }
  .hero { padding: 60px 20px 80px; }
  .hero-stats { gap: 28px; }
  .profiles-grid { grid-template-columns: 1fr; }
  .result-stats { gap: 16px; }
  .footer-top { grid-template-columns: 1fr; }
  .footer-brand { margin-bottom: 8px; }
}

/* ───────────────────────────────
   ANIMACIONES DE ENTRADA
─────────────────────────────── */
@keyframes fadeUp {
  from { opacity: 0; transform: translateY(20px); }
  to   { opacity: 1; transform: translateY(0); }
}
.fade-up { animation: fadeUp .5s ease both; }
.fade-up-1 { animation-delay: .1s; }
.fade-up-2 { animation-delay: .2s; }
.fade-up-3 { animation-delay: .3s; }
.fade-up-4 { animation-delay: .4s; }
.fade-up-5 { animation-delay: .5s; }