/* ============================================
   AUTÓMATA ACADEMY - DESIGN SYSTEM v2.0
   Sistema de diseño centralizado para todo el SaaS
   URL: https://pub-xxx.r2.dev/design-system.css
   ============================================ */

/* ============================================
   VARIABLES GLOBALES
   ============================================ */
:root {
  /* Colores base */
  --bg: #0B0B0B;
  --panel: #1A1A1A;
  --panel-hover: #222222;
  --line: #2A2A2A;
  --text: #F5F5F5;
  --text-muted: #A0A0A0;
  
  /* Colores de marca */
  --accent: #635BFF;
  --accent-hover: #4F46E5;
  --accent-glow: rgba(99, 91, 255, 0.15);
  --accent-glow-05: rgba(99, 91, 255, 0.05);
  --accent-glow-08: rgba(99, 91, 255, 0.08);
  --accent-glow-30: rgba(99, 91, 255, 0.30);
  
  /* Estados */
  --success: #00D924;
  --success-glow: rgba(0, 217, 36, 0.15);
  --warning: #F59E0B;
  --warning-glow: rgba(245, 158, 11, 0.15);
  --danger: #EF4444;
  --danger-glow: rgba(239, 68, 68, 0.15);
  
  /* Medidas */
  --radius: 12px;
  --radius-lg: 16px;
  --radius-sm: 8px;
  
  /* Spacing */
  --spacing-xs: 8px;
  --spacing-sm: 12px;
  --spacing-md: 16px;
  --spacing-lg: 24px;
  --spacing-xl: 32px;
  --spacing-2xl: 48px;
  
  /* Header */
  --header-height: 72px;
  
  /* Transiciones */
  --transition-fast: 0.15s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-base: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 0.5s cubic-bezier(0.4, 0, 0.2, 1);
  
  /* Tipografía */
  --font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Helvetica', sans-serif;
  --font-heading: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
}

/* ============================================
   RESET Y BASE
   ============================================ */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
}

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-family);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  min-height: 100vh;
}

body.has-fixed-header {
  padding-top: var(--header-height);
}

a {
  color: var(--accent);
  text-decoration: none;
  transition: color var(--transition-base);
}

a:hover {
  color: var(--accent-hover);
}

img {
  max-width: 100%;
  height: auto;
}

/* ============================================
   LAYOUT
   ============================================ */
.container {
  width: min(1140px, 92vw);
  margin: 0 auto;
  padding: 40px 20px;
}

.container-narrow {
  width: min(800px, 92vw);
  margin: 0 auto;
  padding: 40px 20px;
}

.container-wide {
  width: min(1400px, 95vw);
  margin: 0 auto;
  padding: 40px 20px;
}

.module-separator {
  height: 48px;
}

/* ============================================
   HEADER FIJO
   ============================================ */
.fixed-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--header-height);
  background: rgba(26, 26, 26, 0.95);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--line);
  z-index: 9999;
  display: flex;
  align-items: center;
  padding: 0 2rem;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.4);
}

.header-content {
  width: 100%;
  max-width: 1140px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo-section {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.logo-container {
  display: flex;
  align-items: center;
  justify-content: center;
}

.logo-container img {
  width: 48px;
  height: 48px;
  object-fit: cover;
  border: 2px solid var(--accent);
  transition: all var(--transition-base);
}

.logo-container.circular img {
  border-radius: 50%;
}

.logo-container.square img {
  border-radius: 8px;
}

.logo-placeholder {
  width: 48px;
  height: 48px;
  background: linear-gradient(135deg, var(--accent), var(--accent-hover));
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 24px;
}

.header-title,
.academy-title {
  font-size: 18px;
  font-weight: 700;
  color: var(--text);
  font-family: var(--font-heading);
}

.header-actions {
  display: flex;
  gap: 12px;
  align-items: center;
}

.header-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 20px;
  background: linear-gradient(135deg, var(--accent) 0%, var(--accent-hover) 100%);
  color: white;
  border: none;
  border-radius: 8px;
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  text-decoration: none;
  transition: all var(--transition-base);
}

.header-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(99, 91, 255, 0.3);
  color: white;
}

/* ============================================
   SELECTOR DE IDIOMA
   ============================================ */
.language-selector {
  display: flex;
  gap: 4px;
  background: var(--bg);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 4px;
}

.language-selector button {
  background: transparent;
  border: none;
  color: var(--text-muted);
  padding: 6px 10px;
  border-radius: 6px;
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition-base);
}

.language-selector button:hover {
  color: var(--text);
  background: var(--panel-hover);
}

.language-selector button.active {
  background: var(--accent);
  color: white;
}

/* ============================================
   HEADER SIMPLE (sin fixed)
   ============================================ */
.header {
  margin-bottom: 56px;
}

.header h1 {
  font-size: 32px;
  font-weight: 700;
  margin-bottom: 8px;
  color: var(--text);
}

.header p {
  font-size: 16px;
  color: var(--text-muted);
  line-height: 1.5;
}

/* ============================================
   BOTONES
   ============================================ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 16px 28px;
  border: none;
  border-radius: 10px;
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition-base);
  text-decoration: none;
  position: relative;
  overflow: hidden;
  font-family: inherit;
}

.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  transform: none !important;
}

.btn-block {
  width: 100%;
}

/* Botón Primario */
.btn-primary {
  background: linear-gradient(135deg, var(--accent) 0%, var(--accent-hover) 100%);
  background-size: 200% 200%;
  color: white;
  box-shadow: 
    0 4px 14px rgba(99, 91, 255, 0.2),
    0 0 16px rgba(99, 91, 255, 0.08),
    inset 0 -2px 4px rgba(0, 0, 0, 0.2);
  animation: gradient-shift 3s ease infinite;
}

.btn-primary:hover:not(:disabled) {
  transform: translateY(-2px);
  box-shadow: 
    0 6px 20px rgba(99, 91, 255, 0.3),
    0 0 24px rgba(99, 91, 255, 0.12),
    inset 0 -2px 4px rgba(0, 0, 0, 0.3);
  color: white;
}

.btn-primary:active:not(:disabled) {
  transform: translateY(-1px) scale(0.98);
}

/* Ripple effect */
.btn-primary::before {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  width: 0;
  height: 0;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.2);
  transform: translate(-50%, -50%);
  transition: width 0.6s, height 0.6s;
}

.btn-primary:active:not(:disabled)::before {
  width: 300px;
  height: 300px;
}

/* Botón Secundario */
.btn-secondary {
  background: transparent;
  color: var(--accent);
  border: 2px solid var(--accent);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
}

.btn-secondary:hover:not(:disabled) {
  background: rgba(99, 91, 255, 0.1);
  border-color: var(--accent-hover);
  color: var(--text);
  transform: translateY(-2px);
}

/* Botón Ghost */
.btn-ghost {
  background: rgba(255, 255, 255, 0.03);
  color: var(--text-muted);
  border: 1px solid var(--line);
}

.btn-ghost:hover:not(:disabled) {
  background: var(--panel-hover);
  color: var(--text);
  border-color: rgba(99, 91, 255, 0.2);
  transform: translateY(-2px);
}

/* Botón Success */
.btn-success {
  background: linear-gradient(135deg, var(--success), #16a34a);
  color: white;
  box-shadow: 0 4px 12px rgba(0, 217, 36, 0.3);
}

.btn-success:hover:not(:disabled) {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(0, 217, 36, 0.4);
  color: white;
}

/* Botón Danger */
.btn-danger {
  background: linear-gradient(135deg, var(--danger), #dc2626);
  color: white;
}

.btn-danger:hover:not(:disabled) {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(239, 68, 68, 0.4);
  color: white;
}

/* Tamaños */
.btn-sm {
  padding: 10px 20px;
  font-size: 14px;
}

.btn-lg {
  padding: 18px 32px;
  font-size: 16px;
}

@keyframes gradient-shift {
  0%, 100% { background-position: 0% 50%; }
  50% { background-position: 100% 50%; }
}

/* ============================================
   CARDS
   ============================================ */
.card {
  background: rgba(26, 26, 26, 0.7);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: var(--radius);
  padding: 40px;
  margin-bottom: var(--spacing-xl);
  box-shadow: 
    0 8px 32px rgba(0, 0, 0, 0.4),
    inset 0 1px 0 rgba(255, 255, 255, 0.05);
  transition: all var(--transition-base);
}

.card:hover {
  transform: translateY(-2px);
  border-color: rgba(99, 91, 255, 0.2);
  box-shadow: 
    0 12px 40px rgba(0, 0, 0, 0.5),
    0 0 30px var(--accent-glow);
}

.card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--spacing-lg);
  gap: var(--spacing-md);
}

.card-title {
  font-size: 20px;
  font-weight: 600;
  color: var(--text);
  display: flex;
  align-items: center;
  gap: 12px;
}

.card-icon {
  width: 48px;
  height: 48px;
  background: linear-gradient(135deg, var(--accent), var(--accent-hover));
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 22px;
  box-shadow: 0 4px 12px rgba(99, 91, 255, 0.2);
  animation: float 3s ease-in-out infinite;
}

@keyframes float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-4px); }
}

/* ============================================
   STATUS BADGES
   ============================================ */
.status-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 16px;
  border-radius: 6px;
  font-size: 14px;
  font-weight: 600;
}

.status-badge.active {
  background: var(--success-glow);
  color: var(--success);
  border: 1px solid var(--success);
}

.status-badge.pending {
  background: var(--warning-glow);
  color: var(--warning);
  border: 1px solid var(--warning);
}

.status-badge.action-required,
.status-badge.error {
  background: var(--danger-glow);
  color: var(--danger);
  border: 1px solid var(--danger);
  animation: pulse-danger 2s ease-in-out infinite;
}

.status-badge.loading {
  background: rgba(160, 160, 160, 0.1);
  color: var(--text-muted);
  border: 1px solid var(--line);
}

@keyframes pulse-danger {
  0%, 100% { box-shadow: 0 0 12px rgba(239, 68, 68, 0.12); }
  50% { box-shadow: 0 0 20px rgba(239, 68, 68, 0.25); }
}

/* ============================================
   FORMULARIOS
   ============================================ */
.form-group {
  margin-bottom: var(--spacing-lg);
}

.form-label {
  display: block;
  margin-bottom: 8px;
  font-weight: 600;
  color: var(--text);
  font-size: 14px;
}

.form-input,
.form-textarea,
.form-select {
  width: 100%;
  padding: 14px 16px;
  background: var(--bg);
  border: 2px solid var(--line);
  border-radius: 8px;
  color: var(--text);
  font-family: inherit;
  font-size: 15px;
  transition: all var(--transition-base);
}

.form-input:focus,
.form-textarea:focus,
.form-select:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-glow);
}

.form-input::placeholder,
.form-textarea::placeholder {
  color: var(--text-muted);
}

.form-textarea {
  min-height: 120px;
  resize: vertical;
  line-height: 1.6;
}

.form-helper {
  margin-top: 6px;
  font-size: 13px;
  color: var(--text-muted);
}

.form-error {
  margin-top: 6px;
  font-size: 13px;
  color: var(--danger);
}

/* ============================================
   INFO BOXES
   ============================================ */
.info-box {
  padding: var(--spacing-lg);
  background: var(--accent-glow-08);
  border: 1px solid rgba(99, 91, 255, 0.25);
  border-radius: var(--radius);
  margin-top: var(--spacing-xl);
}

.info-box-title {
  font-weight: 600;
  margin-bottom: 8px;
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--text);
}

.info-box-list {
  font-size: 14px;
  color: var(--text-muted);
  line-height: 1.8;
  padding-left: 20px;
}

.info-box.success {
  background: var(--success-glow);
  border-color: rgba(0, 217, 36, 0.25);
}

.info-box.warning {
  background: var(--warning-glow);
  border-color: rgba(245, 158, 11, 0.25);
}

.info-box.danger {
  background: var(--danger-glow);
  border-color: rgba(239, 68, 68, 0.25);
}

/* ============================================
   DETAILS GRID
   ============================================ */
.details-grid {
  display: grid;
  gap: 20px;
  margin-bottom: var(--spacing-xl);
}

.detail-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 18px 20px;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--line);
  border-radius: 10px;
  transition: all var(--transition-base);
}

.detail-item:hover {
  background: rgba(255, 255, 255, 0.05);
  border-color: rgba(99, 91, 255, 0.2);
  transform: translateX(4px);
}

.detail-label {
  font-size: 14px;
  color: var(--text-muted);
}

.detail-value {
  font-size: 14px;
  font-weight: 600;
  color: var(--text);
}

.detail-value.success { color: var(--success); }
.detail-value.warning { color: var(--warning); }
.detail-value.danger { color: var(--danger); }

/* ============================================
   HERO SECTION
   ============================================ */
.hero-section {
  margin-bottom: var(--spacing-2xl);
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: var(--spacing-xl);
  align-items: center;
}

.hero-title {
  font-size: clamp(32px, 5vw, 56px);
  margin: 0 0 var(--spacing-md);
  font-weight: 800;
  line-height: 1.1;
  color: var(--text);
  font-family: var(--font-heading);
}

.hero-subtitle {
  color: var(--accent);
  margin: 0 0 var(--spacing-lg);
  font-size: clamp(16px, 2vw, 20px);
  font-weight: 600;
}

.hero-cta {
  display: flex;
  gap: var(--spacing-md);
  flex-wrap: wrap;
  margin: var(--spacing-xl) 0;
}

.hero-cta .btn {
  width: auto;
}

/* Trust Indicators */
.trustbar {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: var(--spacing-md);
  margin-top: var(--spacing-xl);
}

.trust {
  display: flex;
  align-items: center;
  gap: 12px;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: var(--spacing-md);
  transition: all var(--transition-base);
}

.trust:hover {
  border-color: var(--accent);
  transform: translateY(-2px);
}

.trust .icon {
  font-size: 20px;
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, var(--accent), var(--accent-hover));
  border-radius: 8px;
  color: #fff;
  flex-shrink: 0;
}

.trust .trust-text {
  flex: 1;
  color: var(--text);
  font-size: 14px;
}

/* Video Container */
.video-container {
  border: 2px solid var(--line);
  border-radius: var(--radius);
  background: var(--panel);
  padding: var(--spacing-md);
}

.video-player {
  height: 300px;
  border-radius: var(--radius);
  background: #000;
  position: relative;
  overflow: hidden;
}

.video-player iframe,
.video-player video {
  width: 100%;
  height: 100%;
  border: 0;
}

/* ============================================
   CURSOS SECTION
   ============================================ */
.courses-block {
  border-radius: var(--radius);
  padding: var(--spacing-lg);
}

.block-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--spacing-lg);
  padding-bottom: var(--spacing-sm);
  border-bottom: 1px solid var(--line);
}

.block-title {
  color: var(--text);
  font-size: 24px;
  font-weight: 700;
  margin: 0;
  font-family: var(--font-heading);
}

.courses-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: var(--spacing-lg);
}

.course-card {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  transition: all var(--transition-base);
  position: relative;
}

.course-card:hover {
  border-color: var(--accent);
  transform: translateY(-4px);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.3);
}

.course-card.subscribed {
  border-color: rgba(0, 217, 36, 0.3);
}

.course-card.subscribed:hover {
  border-color: var(--success);
  box-shadow: 0 8px 24px rgba(0, 217, 36, 0.2);
}

.course-image-wrapper {
  position: relative;
  width: 100%;
  height: 160px;
  overflow: hidden;
  background: var(--line);
}

.course-image {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s ease;
}

.course-card:hover .course-image {
  transform: scale(1.05);
}

.course-image-placeholder {
  width: 100%;
  height: 100%;
  background: linear-gradient(135deg, var(--panel) 0%, var(--line) 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 48px;
  opacity: 0.5;
}

.course-content {
  padding: 20px;
}

.course-badge {
  display: inline-block;
  background: var(--accent-glow);
  color: var(--accent);
  padding: 4px 10px;
  border-radius: 4px;
  font-size: 11px;
  font-weight: 600;
  margin-bottom: 12px;
  text-transform: uppercase;
}

.course-title {
  font-size: 18px;
  font-weight: 700;
  margin: 0 0 8px;
  color: var(--text);
  font-family: var(--font-heading);
}

.course-subtitle {
  font-size: 14px;
  color: var(--text-muted);
  margin: 0;
  line-height: 1.5;
}

.course-access-badge {
  position: absolute;
  top: 12px;
  right: 12px;
  background: var(--success);
  color: white;
  padding: 6px 12px;
  border-radius: 6px;
  font-size: 12px;
  font-weight: 700;
}

.btn-ver-descripcion {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: transparent;
  border: 1px solid var(--accent);
  color: var(--accent);
  padding: 10px 18px;
  border-radius: 8px;
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  margin-top: var(--spacing-md);
  transition: all var(--transition-base);
}

.btn-ver-descripcion:hover {
  background: var(--accent);
  color: white;
  transform: translateY(-2px);
}

.btn-acceder-curso {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  width: 100%;
  background: linear-gradient(135deg, var(--success), #16a34a);
  border: none;
  color: white;
  padding: 14px 20px;
  border-radius: 10px;
  font-size: 15px;
  font-weight: 700;
  cursor: pointer;
  margin-top: var(--spacing-md);
  transition: all var(--transition-base);
}

.btn-acceder-curso:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(0, 217, 36, 0.4);
}

/* ============================================
   PLANES SECTION
   ============================================ */
.plans-header {
  margin-bottom: var(--spacing-xl);
}

.plans-header h2 {
  font-size: 28px;
  font-weight: 700;
  margin: 0 0 8px;
  font-family: var(--font-heading);
}

.plans-header p {
  color: var(--text-muted);
  margin: 0;
}

.plans-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--spacing-lg);
}

.plan-card {
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: var(--spacing-lg);
  transition: all var(--transition-base);
  position: relative;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  min-height: 380px;
}

.plan-card:hover {
  background: rgba(255, 255, 255, 0.05);
  border-color: var(--accent-glow-30);
  transform: translateY(-4px);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.3);
}

.plan-card.popular {
  border-color: var(--accent);
  background: var(--accent-glow-05);
}

.plan-card.popular::before {
  content: '⭐ Popular';
  position: absolute;
  top: 12px;
  right: 12px;
  font-size: 11px;
  font-weight: 700;
  color: var(--accent);
  background: var(--accent-glow);
  padding: 4px 10px;
  border-radius: 6px;
  border: 1px solid var(--accent);
}

.plan-header {
  margin-bottom: var(--spacing-md);
  text-align: center;
}

.plan-name {
  font-size: 18px;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 12px;
  font-family: var(--font-heading);
}

.plan-price {
  font-size: 32px;
  font-weight: 800;
  color: var(--accent);
  margin-bottom: 4px;
}

.plan-price-currency {
  font-size: 16px;
  color: var(--text-muted);
  margin-left: 4px;
}

.plan-interval {
  font-size: 13px;
  color: var(--text-muted);
  text-align: center;
  margin-bottom: 8px;
}

.plan-description {
  font-size: 14px;
  color: var(--text-muted);
  margin-bottom: var(--spacing-md);
  line-height: 1.5;
  text-align: center;
}

.plan-features {
  list-style: none;
  margin-bottom: 20px;
  flex-grow: 1;
}

.plan-features li {
  font-size: 13px;
  color: var(--text-muted);
  padding: 6px 0;
  padding-left: 24px;
  position: relative;
}

.plan-features li::before {
  content: '✓';
  position: absolute;
  left: 0;
  color: var(--success);
  font-weight: 700;
}

.plan-cta {
  display: block;
  width: 100%;
  padding: 14px;
  background: linear-gradient(135deg, var(--accent) 0%, var(--accent-hover) 100%);
  color: white;
  border: none;
  border-radius: 8px;
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition-base);
  text-align: center;
  margin-top: auto;
}

.plan-cta:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(99, 91, 255, 0.3);
}

/* ============================================
   MODALES
   ============================================ */
.modal {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.85);
  backdrop-filter: blur(4px);
  z-index: 10000;
  overflow-y: auto;
  padding: 20px;
}

.modal.show {
  display: flex;
  align-items: center;
  justify-content: center;
}

.modal-content {
  background: var(--panel);
  border: 2px solid var(--line);
  border-radius: var(--radius);
  padding: 32px;
  max-width: 600px;
  width: 90%;
  max-height: 85vh;
  overflow-y: auto;
  animation: slideUp 0.3s ease;
}

.modal-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--spacing-lg);
}

.modal-title {
  margin: 0;
  color: var(--accent);
  font-size: 20px;
  font-weight: 600;
}

.modal-close {
  background: none;
  border: none;
  color: var(--text-muted);
  font-size: 28px;
  cursor: pointer;
  line-height: 1;
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 8px;
  transition: all var(--transition-base);
}

.modal-close:hover {
  color: var(--accent);
  background: rgba(99, 91, 255, 0.1);
}

@keyframes slideUp {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: translateY(0); }
}

/* Modal Descripción Curso */
.modal-descripcion {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.85);
  backdrop-filter: blur(4px);
  z-index: 10000;
  padding: 20px;
  overflow-y: auto;
}

.modal-descripcion.show {
  display: flex;
  align-items: center;
  justify-content: center;
}

.modal-descripcion-content {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 40px;
  max-width: 800px;
  width: 95%;
  max-height: 85vh;
  overflow-y: auto;
  position: relative;
  animation: slideUp 0.3s ease;
}

.modal-descripcion-close {
  position: absolute;
  top: 20px;
  right: 20px;
  background: none;
  border: none;
  color: var(--text-muted);
  font-size: 32px;
  cursor: pointer;
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 8px;
  transition: all var(--transition-base);
}

.modal-descripcion-close:hover {
  color: var(--accent);
  background: rgba(99, 91, 255, 0.1);
}

.modal-curso-header {
  display: grid;
  grid-template-columns: 180px 1fr;
  gap: 28px;
  margin-bottom: 28px;
  padding-bottom: var(--spacing-lg);
  border-bottom: 1px solid var(--line);
}

.modal-curso-imagen {
  width: 180px;
  height: 180px;
  border-radius: 12px;
  overflow: hidden;
  background: var(--bg);
  border: 1px solid var(--line);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.modal-curso-imagen img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.modal-curso-titulo {
  font-size: 24px;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 12px;
  font-family: var(--font-heading);
}

.modal-curso-subtitulo {
  font-size: 16px;
  color: var(--text-muted);
  line-height: 1.5;
}

.modal-curso-descripcion {
  font-size: 16px;
  color: var(--text);
  line-height: 1.8;
  white-space: pre-wrap;
}

/* ============================================
   NOTIFICACIONES
   ============================================ */
.notification {
  position: fixed;
  bottom: 24px;
  right: 24px;
  padding: 16px 24px;
  border-radius: 12px;
  transform: translateY(150px);
  transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
  z-index: 10001;
  font-weight: 600;
  max-width: 400px;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.4);
}

.notification.show {
  transform: translateY(0);
}

.notification.success {
  background: linear-gradient(135deg, var(--success), #16a34a);
  color: #fff;
}

.notification.error {
  background: linear-gradient(135deg, var(--danger), #dc2626);
  color: #fff;
}

.notification.info {
  background: linear-gradient(135deg, var(--accent), var(--accent-hover));
  color: #fff;
}

.notification.warning {
  background: linear-gradient(135deg, var(--warning), #d97706);
  color: #fff;
}

/* ============================================
   LOADING STATES
   ============================================ */
.loading-container {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: 50vh;
  gap: var(--spacing-lg);
}

.spinner {
  display: inline-block;
  width: 16px;
  height: 16px;
  border: 2.5px solid rgba(255, 255, 255, 0.2);
  border-top-color: white;
  border-radius: 50%;
  animation: spin 0.6s linear infinite;
}

.spinner-large {
  width: 48px;
  height: 48px;
  border: 4px solid rgba(99, 91, 255, 0.2);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

.loading-text {
  color: var(--text-muted);
  font-size: 16px;
}

/* Error State */
.error-container {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: 50vh;
  gap: var(--spacing-lg);
  text-align: center;
  padding: 40px;
}

.error-icon {
  font-size: 64px;
}

.error-title {
  font-size: 24px;
  font-weight: 700;
  color: var(--text);
}

.error-message {
  color: var(--text-muted);
  max-width: 400px;
}

/* ============================================
   FOOTER
   ============================================ */
.footer {
  text-align: center;
  padding: 40px 20px;
  border-top: 1px solid var(--line);
  color: var(--text-muted);
  font-size: 14px;
  margin-top: var(--spacing-2xl);
}

.footer a {
  color: var(--accent);
}

.footer a:hover {
  text-decoration: underline;
}

/* ============================================
   UTILIDADES
   ============================================ */
.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

.text-muted { color: var(--text-muted); }
.text-success { color: var(--success); }
.text-warning { color: var(--warning); }
.text-danger { color: var(--danger); }
.text-accent { color: var(--accent); }

.mt-0 { margin-top: 0; }
.mt-1 { margin-top: var(--spacing-xs); }
.mt-2 { margin-top: var(--spacing-sm); }
.mt-3 { margin-top: var(--spacing-md); }
.mt-4 { margin-top: var(--spacing-lg); }
.mt-5 { margin-top: var(--spacing-xl); }

.mb-0 { margin-bottom: 0; }
.mb-1 { margin-bottom: var(--spacing-xs); }
.mb-2 { margin-bottom: var(--spacing-sm); }
.mb-3 { margin-bottom: var(--spacing-md); }
.mb-4 { margin-bottom: var(--spacing-lg); }
.mb-5 { margin-bottom: var(--spacing-xl); }

.hidden { display: none !important; }
.visible { display: block; }

/* ============================================
   RESPONSIVE - TABLET (max-width: 900px)
   ============================================ */
@media (max-width: 900px) {
  .container {
    padding: 30px 16px;
  }
  
  .hero-grid {
    grid-template-columns: 1fr;
  }
  
  .video-player {
    height: 250px;
  }
}

/* ============================================
   RESPONSIVE - MÓVIL (max-width: 768px)
   ============================================ */
@media (max-width: 768px) {
  :root {
    --header-height: 64px;
  }
  
  .fixed-header {
    padding: 0 1rem;
    height: 64px;
  }
  
  .header-title,
  .academy-title {
    display: none;
  }
  
  .header-btn {
    padding: 8px 16px;
    font-size: 13px;
  }
  
  .logo-container img {
    width: 40px;
    height: 40px;
  }
  
  .logo-placeholder {
    width: 40px;
    height: 40px;
    font-size: 20px;
  }
  
  .header {
    margin-bottom: 40px;
  }
  
  .header h1 {
    font-size: 24px;
  }
  
  .hero-title {
    font-size: 28px;
  }
  
  .hero-subtitle {
    font-size: 16px;
  }
  
  .hero-cta {
    flex-direction: column;
    margin: var(--spacing-lg) 0;
  }
  
  .hero-cta .btn {
    width: 100%;
  }
  
  .trustbar {
    grid-template-columns: 1fr;
  }
  
  .video-player {
    height: 200px;
  }
  
  .courses-grid {
    grid-template-columns: 1fr;
    gap: var(--spacing-md);
  }
  
  .block-title {
    font-size: 20px;
  }
  
  .plans-grid {
    grid-template-columns: 1fr;
    gap: var(--spacing-md);
  }
  
  .plans-header h2 {
    font-size: 22px;
  }
  
  .plan-card {
    min-height: auto;
    padding: 20px;
  }
  
  .card {
    padding: 24px;
  }
  
  .card-header {
    flex-direction: column;
    align-items: flex-start;
    gap: 12px;
  }
  
  .status-badge {
    align-self: flex-start;
  }
  
  .btn {
    padding: 14px 24px;
  }
  
  .modal-content {
    padding: 24px;
  }
  
  .modal-descripcion-content {
    padding: 24px;
  }
  
  .modal-curso-header {
    grid-template-columns: 1fr;
    text-align: center;
  }
  
  .modal-curso-imagen {
    width: 140px;
    height: 140px;
    margin: 0 auto;
  }
  
  .modal-curso-titulo {
    font-size: 20px;
  }
  
  .module-separator {
    height: 32px;
  }
  
  .notification {
    left: 16px;
    right: 16px;
    max-width: none;
  }
}

/* ============================================
   RESPONSIVE - MÓVIL PEQUEÑO (max-width: 480px)
   ============================================ */
@media (max-width: 480px) {
  .container {
    padding: 20px 12px;
  }
  
  .fixed-header {
    padding: 0 12px;
  }
  
  .hero-title {
    font-size: 24px;
  }
  
  .trust {
    padding: 12px;
  }
  
  .trust .icon {
    width: 36px;
    height: 36px;
    font-size: 16px;
  }
  
  .courses-block {
    padding: var(--spacing-md);
  }
  
  .course-content {
    padding: var(--spacing-md);
  }
  
  .course-title {
    font-size: 16px;
  }
  
  .plan-price {
    font-size: 28px;
  }
  
  .btn {
    padding: 14px 20px;
    font-size: 14px;
  }
  
  .footer {
    padding: 30px 16px;
  }
}

/* ============================================
   PRINT STYLES
   ============================================ */
@media print {
  .fixed-header,
  .header-actions,
  .notification,
  .modal {
    display: none !important;
  }
  
  body {
    background: white;
    color: black;
    padding-top: 0;
  }
  
  .card {
    box-shadow: none;
    border: 1px solid #ddd;
  }
}