/* ==========================================================================
   PMP MASTER ECO 2026 - SISTEMA DE DISEÑO PREMIUM (VANILLA CSS)
   Aesthetically crafted with Modern Glassmorphism & High-Contrast Typography
   ========================================================================== */

@import url('https://fonts.googleapis.com/css2?family=Plus+Jakarta+Sans:wght@300;400;500;600;700;800&family=JetBrains+Mono:wght@400;500;600;700&display=swap');

:root {
  /* Paleta Base - Modo Oscuro (Por defecto) */
  --bg-primary: #070a12;
  --bg-secondary: #0d121f;
  --bg-card: rgba(18, 24, 40, 0.75);
  --bg-card-hover: rgba(26, 35, 58, 0.85);
  --bg-elevated: #161e33;
  --border-subtle: rgba(255, 255, 255, 0.08);
  --border-glow: rgba(56, 189, 248, 0.3);

  /* Texto */
  --text-main: #f1f5f9;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;

  /* Acentos y Dominios ECO */
  --color-people: #38bdf8;     /* Sky Cyan (42%) */
  --color-process: #a855f7;    /* Purple Violet (50%) */
  --color-business: #10b981;   /* Emerald Green (8%) */
  --color-accent: #6366f1;     /* Indigo Primary */
  --color-accent-hover: #4f46e5;
  --color-warning: #f59e0b;    /* Amber */
  --color-danger: #ef4444;     /* Rose Red */
  --color-success: #10b981;    /* Emerald */

  /* Sombras y Glassmorphism */
  --glass-blur: blur(16px);
  --glass-shadow: 0 10px 30px -10px rgba(0, 0, 0, 0.5);
  --card-radius: 16px;
  --button-radius: 10px;
  --pill-radius: 9999px;

  /* Transiciones */
  --transition-fast: 0.15s ease;
  --transition-normal: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-bounce: 0.4s cubic-bezier(0.34, 1.56, 0.64, 1);
}

[data-theme="light"] {
  --bg-primary: #f8fafc;
  --bg-secondary: #f1f5f9;
  --bg-card: rgba(255, 255, 255, 0.85);
  --bg-card-hover: rgba(255, 255, 255, 0.95);
  --bg-elevated: #ffffff;
  --border-subtle: rgba(0, 0, 0, 0.08);
  --border-glow: rgba(56, 189, 248, 0.4);

  --text-main: #0f172a;
  --text-secondary: #475569;
  --text-muted: #94a3b8;

  --glass-shadow: 0 10px 25px -5px rgba(0, 0, 0, 0.05);
}

/* Reset y Base */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  background-color: var(--bg-primary);
  color: var(--text-main);
  min-height: 100vh;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  background-image: 
    radial-gradient(at 0% 0%, rgba(99, 102, 241, 0.12) 0px, transparent 50%),
    radial-gradient(at 100% 0%, rgba(56, 189, 248, 0.10) 0px, transparent 50%),
    radial-gradient(at 50% 100%, rgba(168, 85, 247, 0.08) 0px, transparent 50%);
  background-attachment: fixed;
}

/* ==========================================================================
   HEADER PRINCIPAL & BARRA SUPERIOR
   ========================================================================== */
.app-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--bg-card);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border-bottom: 1px solid var(--border-subtle);
  padding: 0.75rem 1.5rem;
  box-shadow: var(--glass-shadow);
}

.header-container {
  max-width: 1400px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.brand-section {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.brand-logo-icon {
  width: 40px;
  height: 40px;
  border-radius: 12px;
  background: linear-gradient(135deg, #6366f1, #38bdf8);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  font-size: 1.25rem;
  color: white;
  box-shadow: 0 4px 12px rgba(99, 102, 241, 0.35);
}

.brand-text h1 {
  font-size: 1.15rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  background: linear-gradient(to right, #38bdf8, #a855f7);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.brand-subtitle {
  font-size: 0.72rem;
  color: var(--text-secondary);
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

/* Navegación por pestañas */
.main-nav-tabs {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  background: rgba(0, 0, 0, 0.25);
  padding: 0.3rem 0.4rem;
  border-radius: var(--pill-radius);
  border: 1px solid var(--border-subtle);
}

.nav-tab-btn {
  background: transparent;
  border: none;
  color: var(--text-secondary);
  font-family: inherit;
  font-size: 0.88rem;
  font-weight: 600;
  padding: 0.5rem 1rem;
  border-radius: var(--pill-radius);
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 0.4rem;
  transition: all var(--transition-normal);
}

.nav-tab-btn:hover {
  color: var(--text-main);
  background: rgba(255, 255, 255, 0.06);
}

.nav-tab-btn.active {
  background: var(--color-accent);
  color: #ffffff;
  box-shadow: 0 2px 10px rgba(99, 102, 241, 0.4);
}

/* Header Quick Stats & Controls */
.header-actions {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.streak-pill {
  display: flex;
  align-items: center;
  gap: 0.35rem;
  background: rgba(245, 158, 11, 0.15);
  color: #fbbf24;
  border: 1px solid rgba(245, 158, 11, 0.3);
  padding: 0.35rem 0.75rem;
  border-radius: var(--pill-radius);
  font-size: 0.82rem;
  font-weight: 700;
}

.readiness-pill {
  display: flex;
  align-items: center;
  gap: 0.35rem;
  background: rgba(16, 185, 129, 0.15);
  color: #34d399;
  border: 1px solid rgba(16, 185, 129, 0.3);
  padding: 0.35rem 0.75rem;
  border-radius: var(--pill-radius);
  font-size: 0.82rem;
  font-weight: 700;
}

.icon-button {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  color: var(--text-main);
  width: 36px;
  height: 36px;
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  font-size: 1.1rem;
  transition: all var(--transition-fast);
}

.icon-button:hover {
  background: var(--bg-card-hover);
  border-color: var(--border-glow);
  transform: translateY(-1px);
}

/* ==========================================================================
   VISTAS DE LA APP (PÁGINAS)
   ========================================================================== */
.app-main-content {
  max-width: 1400px;
  margin: 0 auto;
  padding: 2rem 1.5rem 5rem;
}

.app-view {
  display: none;
}

.app-view.active-view {
  display: block;
  animation: fadeIn 0.3s ease-out;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: translateY(0); }
}

/* ==========================================================================
   VISTA 1: DASHBOARD
   ========================================================================== */
.dash-hero-banner {
  background: linear-gradient(135deg, rgba(99, 102, 241, 0.2), rgba(56, 189, 248, 0.15));
  border: 1px solid var(--border-glow);
  border-radius: var(--card-radius);
  padding: 2.2rem;
  margin-bottom: 2rem;
  position: relative;
  overflow: hidden;
  box-shadow: var(--glass-shadow);
}

.dash-hero-banner::after {
  content: '';
  position: absolute;
  top: -50%;
  right: -10%;
  width: 350px;
  height: 350px;
  background: radial-gradient(circle, rgba(56, 189, 248, 0.15) 0%, transparent 70%);
  pointer-events: none;
}

.dash-hero-content h2 {
  font-size: 1.85rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  margin-bottom: 0.5rem;
}

.dash-hero-content p {
  color: var(--text-secondary);
  font-size: 1.05rem;
  max-width: 700px;
  margin-bottom: 1.5rem;
}

.dash-quick-actions-bar {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
}

/* Métricas Clave del Dashboard */
.dash-metrics-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 1.25rem;
  margin-bottom: 2rem;
}

.metric-card {
  background: var(--bg-card);
  backdrop-filter: var(--glass-blur);
  border: 1px solid var(--border-subtle);
  border-radius: var(--card-radius);
  padding: 1.5rem;
  display: flex;
  align-items: center;
  gap: 1.25rem;
  transition: transform var(--transition-normal), border-color var(--transition-normal);
}

.metric-card:hover {
  transform: translateY(-2px);
  border-color: var(--border-glow);
}

.metric-icon-box {
  width: 52px;
  height: 52px;
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
}

.box-blue { background: rgba(56, 189, 248, 0.15); color: #38bdf8; }
.box-purple { background: rgba(168, 85, 247, 0.15); color: #a855f7; }
.box-emerald { background: rgba(16, 185, 129, 0.15); color: #10b981; }
.box-amber { background: rgba(245, 158, 11, 0.15); color: #f59e0b; }

.metric-info h4 {
  font-size: 0.85rem;
  color: var(--text-secondary);
  text-transform: uppercase;
  font-weight: 600;
  letter-spacing: 0.05em;
  margin-bottom: 0.25rem;
}

.metric-number {
  font-size: 1.75rem;
  font-weight: 800;
  font-family: 'JetBrains Mono', monospace;
  color: var(--text-main);
}

/* Desglose ECO 2026 */
.dash-two-column-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.5rem;
  margin-bottom: 2rem;
}

.dash-panel-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--card-radius);
  padding: 1.75rem;
}

.panel-title {
  font-size: 1.2rem;
  font-weight: 700;
  margin-bottom: 1.25rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.eco-distribution-list {
  display: flex;
  flex-direction: column;
  gap: 1.1rem;
}

.eco-domain-bar-item {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}

.eco-bar-header {
  display: flex;
  justify-content: space-between;
  font-size: 0.92rem;
  font-weight: 600;
}

.progress-bar-container {
  height: 8px;
  background: rgba(255, 255, 255, 0.08);
  border-radius: 999px;
  overflow: hidden;
}

.progress-bar-fill {
  height: 100%;
  border-radius: 999px;
  transition: width 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}

.bg-people { background: var(--color-people); }
.bg-process { background: var(--color-process); }
.bg-business { background: var(--color-business); }

/* Historial de exámenes recientes */
.recent-exams-list {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.history-item-row {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 0.75rem 1rem;
  background: rgba(0, 0, 0, 0.2);
  border-radius: 10px;
  border: 1px solid var(--border-subtle);
}

.history-score {
  font-family: 'JetBrains Mono', monospace;
  font-weight: 800;
  font-size: 1.1rem;
  padding: 0.35rem 0.65rem;
  border-radius: 8px;
  min-width: 60px;
  text-align: center;
}

.score-passed { background: rgba(16, 185, 129, 0.2); color: #34d399; }
.score-failed { background: rgba(239, 68, 68, 0.2); color: #f87171; }

.history-details {
  display: flex;
  flex-direction: column;
}

.history-mode {
  font-weight: 600;
  font-size: 0.9rem;
}

.history-date {
  font-size: 0.75rem;
  color: var(--text-secondary);
}

/* ==========================================================================
   VISTA 2: SIMULADOR DE EXAMEN
   ========================================================================== */
.simulator-layout {
  display: grid;
  grid-template-columns: 1fr 300px;
  gap: 1.75rem;
  align-items: start;
}

.simulator-main-panel {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--card-radius);
  padding: 2rem;
  box-shadow: var(--glass-shadow);
}

.sim-top-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1.5rem;
  padding-bottom: 1rem;
  border-bottom: 1px solid var(--border-subtle);
}

.timer-badge {
  font-family: 'JetBrains Mono', monospace;
  font-weight: 700;
  font-size: 1.1rem;
  background: rgba(99, 102, 241, 0.2);
  color: #818cf8;
  padding: 0.4rem 0.85rem;
  border-radius: var(--pill-radius);
  border: 1px solid rgba(99, 102, 241, 0.4);
}

.timer-urgent {
  background: rgba(239, 68, 68, 0.2) !important;
  color: #f87171 !important;
  border-color: rgba(239, 68, 68, 0.5) !important;
  animation: pulse 1s infinite alternate;
}

@keyframes pulse {
  from { transform: scale(1); }
  to { transform: scale(1.04); }
}

/* Question Header & Body */
.question-header-info {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1.25rem;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.question-tags {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
}

.badge {
  font-size: 0.75rem;
  font-weight: 700;
  padding: 0.3rem 0.65rem;
  border-radius: var(--pill-radius);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.badge-domain { background: rgba(56, 189, 248, 0.15); color: #38bdf8; border: 1px solid rgba(56, 189, 248, 0.3); }
.badge-approach { background: rgba(168, 85, 247, 0.15); color: #c084fc; border: 1px solid rgba(168, 85, 247, 0.3); }
.badge-task { background: rgba(255, 255, 255, 0.08); color: var(--text-secondary); }
.badge-subtle { background: rgba(255, 255, 255, 0.06); color: var(--text-secondary); }

.question-progress-bar-container {
  height: 6px;
  background: rgba(255, 255, 255, 0.08);
  border-radius: 999px;
  overflow: hidden;
  margin-bottom: 1.75rem;
}

.question-number {
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--color-people);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 0.5rem;
}

.question-scenario {
  font-size: 1.05rem;
  line-height: 1.65;
  color: var(--text-main);
  margin-bottom: 1rem;
}

.question-prompt {
  font-size: 1.1rem;
  color: #ffffff;
  padding: 0.75rem 1rem;
  background: rgba(99, 102, 241, 0.1);
  border-left: 4px solid var(--color-accent);
  border-radius: 0 8px 8px 0;
  margin-bottom: 1.5rem;
}

/* Opciones de respuesta */
.options-container {
  display: flex;
  flex-direction: column;
  gap: 0.85rem;
  margin-bottom: 2rem;
}

.quiz-option-card {
  background: var(--bg-elevated);
  border: 1px solid var(--border-subtle);
  border-radius: 12px;
  padding: 1rem 1.25rem;
  cursor: pointer;
  transition: all var(--transition-fast);
  position: relative;
}

.quiz-option-card:hover {
  background: var(--bg-card-hover);
  border-color: var(--border-glow);
  transform: translateX(3px);
}

.option-header-row {
  display: flex;
  align-items: flex-start;
  gap: 1rem;
}

.option-letter {
  font-family: 'JetBrains Mono', monospace;
  font-weight: 800;
  font-size: 0.95rem;
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.08);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.option-text {
  font-size: 0.98rem;
  flex-grow: 1;
  color: var(--text-main);
}

.btn-strike-toggle {
  background: transparent;
  border: none;
  color: var(--text-muted);
  font-size: 0.75rem;
  cursor: pointer;
  padding: 0.2rem 0.5rem;
  border-radius: 6px;
  transition: all var(--transition-fast);
  flex-shrink: 0;
}

.btn-strike-toggle:hover {
  color: var(--color-danger);
  background: rgba(239, 68, 68, 0.1);
}

/* Estados de opción */
.option-selected {
  border-color: var(--color-accent) !important;
  background: rgba(99, 102, 241, 0.15) !important;
}

.option-selected .option-letter {
  background: var(--color-accent);
  color: white;
}

.option-correct {
  border-color: var(--color-success) !important;
  background: rgba(16, 185, 129, 0.15) !important;
}

.option-correct .option-letter {
  background: var(--color-success);
  color: white;
}

.option-incorrect {
  border-color: var(--color-danger) !important;
  background: rgba(239, 68, 68, 0.15) !important;
}

.option-incorrect .option-letter {
  background: var(--color-danger);
  color: white;
}

.option-struck {
  opacity: 0.45;
}

.option-struck .option-text {
  text-decoration: line-through;
}

/* Feedback Panel */
.feedback-panel {
  border-radius: var(--card-radius);
  padding: 1.5rem;
  margin-bottom: 2rem;
  border: 1px solid transparent;
}

.feedback-success {
  background: rgba(16, 185, 129, 0.08);
  border-color: rgba(16, 185, 129, 0.3);
}

.feedback-error {
  background: rgba(239, 68, 68, 0.08);
  border-color: rgba(239, 68, 68, 0.3);
}

.feedback-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1rem;
}

.feedback-icon {
  font-weight: 800;
  font-size: 1.15rem;
}

.feedback-explanation {
  margin-bottom: 1.25rem;
}

.feedback-explanation h4, .distractor-breakdown h4 {
  font-size: 0.95rem;
  color: var(--text-main);
  margin-bottom: 0.5rem;
}

.distractor-list {
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
  margin-bottom: 1.25rem;
}

.distractor-item {
  padding: 0.65rem 0.85rem;
  border-radius: 8px;
  font-size: 0.88rem;
}

.distractor-correct {
  background: rgba(16, 185, 129, 0.12);
  border-left: 3px solid var(--color-success);
}

.distractor-wrong {
  background: rgba(255, 255, 255, 0.04);
  border-left: 3px solid var(--text-muted);
}

.mindset-tip-box {
  background: rgba(245, 158, 11, 0.1);
  border: 1px solid rgba(245, 158, 11, 0.3);
  padding: 0.85rem 1rem;
  border-radius: 10px;
  color: #fbbf24;
  font-size: 0.9rem;
}

.mindset-tip-box strong {
  display: block;
  margin-bottom: 0.25rem;
}

/* Footer Nav */
.question-footer-nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  padding-top: 1rem;
  border-top: 1px solid var(--border-subtle);
}

/* Simulator Sidebar (Grid de navegación rápida) */
.simulator-sidebar {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--card-radius);
  padding: 1.5rem;
  position: sticky;
  top: 90px;
}

.sidebar-title {
  font-size: 0.95rem;
  font-weight: 700;
  margin-bottom: 1rem;
  color: var(--text-secondary);
}

.question-nav-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 0.5rem;
  margin-bottom: 1.5rem;
}

.nav-grid-item {
  aspect-ratio: 1;
  background: var(--bg-elevated);
  border: 1px solid var(--border-subtle);
  border-radius: 8px;
  color: var(--text-secondary);
  font-family: 'JetBrains Mono', monospace;
  font-weight: 600;
  font-size: 0.85rem;
  cursor: pointer;
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition-fast);
}

.nav-grid-item:hover {
  border-color: var(--color-accent);
  color: var(--text-main);
}

.nav-grid-item.current {
  border-color: var(--color-people);
  box-shadow: 0 0 10px rgba(56, 189, 248, 0.4);
  color: #ffffff;
}

.nav-grid-item.answered {
  background: rgba(99, 102, 241, 0.25);
  color: #a5b4fc;
}

.grid-flag {
  position: absolute;
  top: -4px;
  right: -4px;
  font-size: 0.65rem;
}

.sidebar-actions {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

/* Resultados de Examen */
.exam-results-screen {
  padding: 1rem 0;
}

.results-hero {
  border-radius: var(--card-radius);
  padding: 2.25rem;
  display: flex;
  align-items: center;
  gap: 2rem;
  margin-bottom: 2rem;
  border: 1px solid transparent;
}

.hero-passed {
  background: linear-gradient(135deg, rgba(16, 185, 129, 0.2), rgba(56, 189, 248, 0.15));
  border-color: rgba(16, 185, 129, 0.4);
}

.hero-failed {
  background: linear-gradient(135deg, rgba(239, 68, 68, 0.2), rgba(245, 158, 11, 0.15));
  border-color: rgba(239, 68, 68, 0.4);
}

.score-circle {
  width: 110px;
  height: 110px;
  border-radius: 50%;
  background: var(--bg-card);
  border: 4px solid var(--color-accent);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  box-shadow: var(--glass-shadow);
}

.score-number {
  font-size: 1.85rem;
  font-weight: 800;
  font-family: 'JetBrains Mono', monospace;
}

.score-label {
  font-size: 0.7rem;
  text-transform: uppercase;
  color: var(--text-secondary);
}

.hero-text h2 {
  font-size: 1.6rem;
  margin-bottom: 0.5rem;
}

.hero-stats-chips {
  display: flex;
  gap: 1rem;
  margin-top: 1rem;
  font-weight: 600;
  font-size: 0.9rem;
}

.results-domains-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 1rem;
  margin-bottom: 2rem;
}

.result-domain-card {
  background: var(--bg-elevated);
  border: 1px solid var(--border-subtle);
  border-radius: 12px;
  padding: 1.25rem;
}

.domain-card-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 0.75rem;
}

.rating-badge {
  font-size: 0.72rem;
  font-weight: 700;
  padding: 0.2rem 0.5rem;
  border-radius: 4px;
}

.rating-high { background: rgba(16, 185, 129, 0.2); color: #34d399; }
.rating-med { background: rgba(56, 189, 248, 0.2); color: #38bdf8; }
.rating-low { background: rgba(239, 68, 68, 0.2); color: #f87171; }

.domain-stats-row {
  display: flex;
  justify-content: space-between;
  font-size: 0.88rem;
  margin-bottom: 0.4rem;
}

.results-actions-bar {
  display: flex;
  gap: 1rem;
  justify-content: flex-end;
}

/* ==========================================================================
   VISTA 3: FLASHCARDS (3D CARD FLIP & LEITNER)
   ========================================================================== */
.flashcards-layout {
  max-width: 800px;
  margin: 0 auto;
}

.flashcards-header-controls {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1.5rem;
  flex-wrap: wrap;
  gap: 1rem;
}

.filters-group {
  display: flex;
  gap: 0.75rem;
}

.select-control {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  color: var(--text-main);
  padding: 0.5rem 1rem;
  border-radius: 10px;
  font-family: inherit;
  font-size: 0.9rem;
  cursor: pointer;
}

.leitner-stats-pills {
  display: flex;
  gap: 0.6rem;
}

.leitner-pill {
  font-size: 0.8rem;
  font-weight: 700;
  padding: 0.35rem 0.75rem;
  border-radius: var(--pill-radius);
}

.pill-l1 { background: rgba(239, 68, 68, 0.15); color: #f87171; border: 1px solid rgba(239, 68, 68, 0.3); }
.pill-l2 { background: rgba(245, 158, 11, 0.15); color: #fbbf24; border: 1px solid rgba(245, 158, 11, 0.3); }
.pill-l3 { background: rgba(16, 185, 129, 0.15); color: #34d399; border: 1px solid rgba(16, 185, 129, 0.3); }

/* Escena 3D de la tarjeta */
.flashcard-scene {
  perspective: 1200px;
  width: 100%;
  height: 380px;
  margin-bottom: 1.75rem;
}

.flashcard {
  width: 100%;
  height: 100%;
  position: relative;
  transform-style: preserve-3d;
  transition: transform 0.6s cubic-bezier(0.4, 0, 0.2, 1);
  cursor: pointer;
}

.flashcard.is-flipped {
  transform: rotateY(180deg);
}

.flashcard-face {
  position: absolute;
  width: 100%;
  height: 100%;
  backface-visibility: hidden;
  -webkit-backface-visibility: hidden;
  border-radius: 20px;
  padding: 2.5rem;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  background: var(--bg-card);
  backdrop-filter: var(--glass-blur);
  border: 1px solid var(--border-glow);
  box-shadow: 0 20px 40px -15px rgba(0, 0, 0, 0.6);
}

.flashcard-front {
  background: linear-gradient(135deg, rgba(22, 30, 51, 0.9), rgba(13, 18, 31, 0.95));
}

.flashcard-back {
  background: linear-gradient(135deg, rgba(30, 27, 75, 0.95), rgba(17, 24, 39, 0.95));
  transform: rotateY(180deg);
  border-color: rgba(168, 85, 247, 0.4);
}

.card-prompt-label {
  font-size: 0.78rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-people);
}

.flashcard-back .card-prompt-label {
  color: #c084fc;
}

.card-content-text {
  font-size: 1.35rem;
  font-weight: 600;
  line-height: 1.55;
  color: #ffffff;
  text-align: center;
  margin: auto 0;
}

.flashcard-back .card-content-text {
  font-size: 1.05rem;
  text-align: left;
  line-height: 1.65;
}

.card-flip-hint {
  text-align: center;
  font-size: 0.82rem;
  color: var(--text-muted);
}

.card-tag-pill {
  font-size: 0.8rem;
  color: var(--text-secondary);
  border-top: 1px solid var(--border-subtle);
  padding-top: 0.75rem;
}

.flashcard-meta-bar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 0.75rem;
}

.level-learning { background: rgba(239, 68, 68, 0.2); color: #f87171; }
.level-review { background: rgba(245, 158, 11, 0.2); color: #fbbf24; }
.level-mastered { background: rgba(16, 185, 129, 0.2); color: #34d399; }

.flashcard-actions-row {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
  margin-bottom: 1.5rem;
}

.btn-card-action {
  padding: 0.85rem;
  font-weight: 700;
  font-size: 0.95rem;
  border-radius: 12px;
}

.flashcard-nav-controls {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

/* ==========================================================================
   VISTA 4: LABORATORIO DE FÓRMULAS & EVM
   ========================================================================== */
.evm-layout {
  display: flex;
  flex-direction: column;
  gap: 2rem;
}

.evm-calc-section {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--card-radius);
  padding: 2rem;
}

.evm-inputs-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 1.25rem;
  margin-bottom: 2rem;
}

.input-field-group {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}

.input-field-group label {
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--text-secondary);
}

.text-input {
  background: var(--bg-elevated);
  border: 1px solid var(--border-subtle);
  border-radius: 10px;
  padding: 0.75rem 1rem;
  color: var(--text-main);
  font-family: 'JetBrains Mono', monospace;
  font-size: 1.1rem;
  font-weight: 600;
  transition: border-color var(--transition-fast);
}

.text-input:focus {
  outline: none;
  border-color: var(--color-people);
  box-shadow: 0 0 10px rgba(56, 189, 248, 0.3);
}

.evm-metrics-cards-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 1rem;
  margin-bottom: 1.75rem;
}

.evm-stat-box {
  background: var(--bg-elevated);
  border: 1px solid var(--border-subtle);
  border-radius: 12px;
  padding: 1.25rem;
  text-align: center;
}

.evm-stat-label {
  font-size: 0.78rem;
  font-weight: 700;
  text-transform: uppercase;
  color: var(--text-secondary);
  margin-bottom: 0.5rem;
}

.metric-val {
  font-family: 'JetBrains Mono', monospace;
  font-size: 1.6rem;
  font-weight: 800;
}

.metric-sub {
  font-size: 0.75rem;
  font-weight: 700;
  margin-top: 0.25rem;
}

.status-good { color: #34d399; }
.status-bad { color: #f87171; }

.evm-diagnostic-banner {
  background: rgba(0, 0, 0, 0.25);
  border: 1px solid var(--border-subtle);
  border-radius: 12px;
  padding: 1.25rem 1.5rem;
  font-size: 0.98rem;
}

.diag-good { color: #34d399; font-weight: 800; }
.diag-warn { color: #fbbf24; font-weight: 800; }
.diag-bad { color: #f87171; font-weight: 800; }

/* Subcalculadoras PERT & Canales */
.secondary-calcs-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.5rem;
}

/* Reto Situacional de Cálculo */
.challenge-card {
  background: var(--bg-card);
  border: 1px solid var(--border-glow);
  border-radius: var(--card-radius);
  padding: 2rem;
  box-shadow: var(--glass-shadow);
}

.challenge-badge {
  display: inline-block;
  background: rgba(245, 158, 11, 0.15);
  color: #fbbf24;
  border: 1px solid rgba(245, 158, 11, 0.3);
  font-weight: 700;
  font-size: 0.8rem;
  padding: 0.3rem 0.75rem;
  border-radius: var(--pill-radius);
  margin-bottom: 1rem;
}

.challenge-scenario {
  font-size: 1.05rem;
  line-height: 1.6;
  margin-bottom: 0.75rem;
}

.challenge-prompt {
  font-size: 1.1rem;
  color: #ffffff;
  margin-bottom: 1.5rem;
}

.challenge-options-grid {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  margin-bottom: 1.5rem;
}

.challenge-opt-btn {
  background: var(--bg-elevated);
  border: 1px solid var(--border-subtle);
  color: var(--text-main);
  padding: 1rem 1.25rem;
  border-radius: 12px;
  text-align: left;
  font-family: inherit;
  font-size: 0.95rem;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.challenge-opt-btn:hover {
  background: var(--bg-card-hover);
  border-color: var(--border-glow);
}

.btn-opt-correct {
  background: rgba(16, 185, 129, 0.2) !important;
  border-color: var(--color-success) !important;
  color: #34d399 !important;
}

.btn-opt-incorrect {
  background: rgba(239, 68, 68, 0.2) !important;
  border-color: var(--color-danger) !important;
  color: #f87171 !important;
}

.challenge-feedback-box {
  padding: 1.25rem;
  border-radius: 12px;
  margin-bottom: 1.5rem;
}

/* ==========================================================================
   VISTA 5: GLOSARIO & DESGLOSE ECO 2026
   ========================================================================== */
.eco-explorer-header {
  margin-bottom: 2rem;
}

.search-input-wrapper {
  margin-top: 1rem;
  position: relative;
}

.search-input-wrapper input {
  width: 100%;
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  padding: 0.9rem 1.25rem 0.9rem 2.8rem;
  border-radius: 12px;
  color: var(--text-main);
  font-family: inherit;
  font-size: 1rem;
}

.search-icon-inside {
  position: absolute;
  left: 1rem;
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-muted);
}

.eco-tabs-selector {
  display: flex;
  gap: 0.5rem;
  margin-bottom: 1.5rem;
  border-bottom: 1px solid var(--border-subtle);
  padding-bottom: 0.75rem;
}

.btn-subview-tab {
  background: transparent;
  border: none;
  color: var(--text-secondary);
  font-family: inherit;
  font-weight: 700;
  font-size: 1rem;
  padding: 0.5rem 1rem;
  cursor: pointer;
  border-radius: 8px;
  transition: all var(--transition-fast);
}

.btn-subview-tab.active {
  color: #ffffff;
  background: rgba(255, 255, 255, 0.08);
}

.eco-domain-filters-bar {
  display: flex;
  gap: 0.5rem;
  margin-bottom: 1.5rem;
  flex-wrap: wrap;
}

.btn-eco-filter {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  color: var(--text-secondary);
  font-family: inherit;
  font-size: 0.85rem;
  font-weight: 600;
  padding: 0.4rem 0.85rem;
  border-radius: var(--pill-radius);
  cursor: pointer;
}

.btn-eco-filter.active {
  background: var(--color-accent);
  color: white;
  border-color: var(--color-accent);
}

/* Acordeón de Dominios ECO */
.eco-domain-accordion {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--card-radius);
  margin-bottom: 1.5rem;
  overflow: hidden;
}

.domain-accordion-header {
  padding: 1.5rem 1.75rem;
  border-left: 6px solid var(--color-people);
  display: flex;
  justify-content: space-between;
  align-items: center;
  cursor: pointer;
  background: rgba(255, 255, 255, 0.02);
  transition: background var(--transition-fast);
}

.domain-accordion-header:hover {
  background: rgba(255, 255, 255, 0.05);
}

.domain-tag-weight {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 800;
  padding: 0.2rem 0.5rem;
  border-radius: 6px;
  margin-bottom: 0.4rem;
}

.domain-header-main h3 {
  font-size: 1.3rem;
  margin-bottom: 0.3rem;
}

.domain-desc {
  color: var(--text-secondary);
  font-size: 0.9rem;
}

.accordion-arrow {
  font-size: 0.85rem;
  color: var(--text-muted);
  transition: transform var(--transition-normal);
}

.eco-domain-accordion.collapsed .accordion-arrow {
  transform: rotate(-9deg);
}

.eco-domain-accordion.collapsed .domain-accordion-body {
  display: none;
}

.domain-accordion-body {
  padding: 1.5rem;
  border-top: 1px solid var(--border-subtle);
}

.tasks-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 1.25rem;
}

.eco-task-card {
  background: var(--bg-elevated);
  border: 1px solid var(--border-subtle);
  border-radius: 12px;
  padding: 1.25rem;
}

.task-card-header {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 0.75rem;
}

.task-badge {
  background: rgba(99, 102, 241, 0.2);
  color: #818cf8;
  font-family: 'JetBrains Mono', monospace;
  font-weight: 800;
  font-size: 0.8rem;
  padding: 0.2rem 0.5rem;
  border-radius: 6px;
}

.task-title {
  font-size: 0.98rem;
  font-weight: 700;
}

.enablers-title {
  font-size: 0.78rem;
  font-weight: 700;
  text-transform: uppercase;
  color: var(--text-muted);
  display: block;
  margin-bottom: 0.4rem;
}

.enablers-list {
  padding-left: 1.25rem;
  font-size: 0.86rem;
  color: var(--text-secondary);
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}

/* Glosario Grid */
.glossary-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 1.25rem;
}

.glossary-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: 14px;
  padding: 1.5rem;
}

.glossary-header {
  margin-bottom: 0.75rem;
}

.glossary-term {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--color-people);
  margin-bottom: 0.4rem;
}

.glossary-tags {
  display: flex;
  gap: 0.4rem;
}

.glossary-def {
  font-size: 0.92rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

/* ==========================================================================
   VISTA 6: MINDSET PMP (REGLAS DE ORO)
   ========================================================================== */
.mindset-hero-banner {
  background: linear-gradient(135deg, rgba(245, 158, 11, 0.15), rgba(99, 102, 241, 0.15));
  border: 1px solid rgba(245, 158, 11, 0.3);
  border-radius: var(--card-radius);
  padding: 2rem;
  margin-bottom: 2rem;
}

.mindset-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(380px, 1fr));
  gap: 1.5rem;
}

.mindset-rule-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--card-radius);
  padding: 1.75rem;
}

.rule-card-header h3 {
  font-size: 1.15rem;
  color: #fbbf24;
  margin-bottom: 0.5rem;
}

.rule-statement {
  font-size: 0.95rem;
  color: var(--text-main);
  margin-bottom: 1.25rem;
  line-height: 1.5;
}

.rule-comparison-grid {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.rule-do-box {
  background: rgba(16, 185, 129, 0.08);
  border-left: 3px solid var(--color-success);
  padding: 0.75rem 1rem;
  border-radius: 0 8px 8px 0;
  font-size: 0.88rem;
}

.rule-dont-box {
  background: rgba(239, 68, 68, 0.08);
  border-left: 3px solid var(--color-danger);
  padding: 0.75rem 1rem;
  border-radius: 0 8px 8px 0;
  font-size: 0.88rem;
}

.box-tag {
  font-size: 0.72rem;
  font-weight: 800;
  display: block;
  margin-bottom: 0.2rem;
}

.tag-do { color: #34d399; }
.tag-dont { color: #f87171; }

/* ==========================================================================
   VISTA 7: ESTADÍSTICAS & GESTIÓN
   ========================================================================== */
.stats-hero-banner {
  background: var(--bg-card);
  border: 1px solid var(--border-glow);
  border-radius: var(--card-radius);
  padding: 2rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 2rem;
  flex-wrap: wrap;
  gap: 1.5rem;
}

.stats-circle-container {
  display: flex;
  align-items: center;
  gap: 1.5rem;
}

.big-stat-number {
  font-family: 'JetBrains Mono', monospace;
  font-size: 3.5rem;
  font-weight: 800;
  color: var(--color-people);
}

.stats-breakdown-panel {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--card-radius);
  padding: 2rem;
  margin-bottom: 2rem;
}

.backup-management-panel {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--card-radius);
  padding: 2rem;
}

.backup-actions-row {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
  margin-top: 1rem;
}

/* ==========================================================================
   MODALES
   ========================================================================== */
.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  background: rgba(0, 0, 0, 0.75);
  backdrop-filter: blur(8px);
  z-index: 1000;
  display: none;
  align-items: center;
  justify-content: center;
  padding: 1.5rem;
}

.modal-overlay.active {
  display: flex;
  animation: fadeIn 0.2s ease-out;
}

.modal-content-card {
  background: var(--bg-elevated);
  border: 1px solid var(--border-glow);
  border-radius: var(--card-radius);
  width: 100%;
  max-width: 520px;
  box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.8);
  overflow: hidden;
}

.modal-header {
  padding: 1.25rem 1.5rem;
  border-bottom: 1px solid var(--border-subtle);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.modal-header h3 {
  font-size: 1.2rem;
}

.modal-body {
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.modal-footer {
  padding: 1rem 1.5rem;
  border-top: 1px solid var(--border-subtle);
  display: flex;
  justify-content: flex-end;
  gap: 0.75rem;
  background: rgba(0, 0, 0, 0.15);
}

/* Mini Calculadora Flotante */
.calculator-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0.5rem;
  margin-top: 1rem;
}

.calc-display {
  grid-column: span 4;
  background: var(--bg-primary);
  border: 1px solid var(--border-subtle);
  border-radius: 8px;
  padding: 0.75rem 1rem;
  font-family: 'JetBrains Mono', monospace;
  font-size: 1.35rem;
  text-align: right;
  color: var(--text-main);
  outline: none;
}

.calc-key {
  padding: 0.85rem;
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  color: var(--text-main);
  font-family: 'JetBrains Mono', monospace;
  font-size: 1.1rem;
  font-weight: 700;
  border-radius: 8px;
  cursor: pointer;
  transition: background var(--transition-fast);
}

.calc-key:hover {
  background: var(--bg-card-hover);
}

.key-op {
  background: rgba(99, 102, 241, 0.2);
  color: #a5b4fc;
}

.key-equal {
  background: var(--color-accent);
  color: white;
}

/* ==========================================================================
   BOTONES Y COMPONENTES GLOBALES
   ========================================================================== */
.btn {
  font-family: inherit;
  font-size: 0.92rem;
  font-weight: 700;
  padding: 0.65rem 1.25rem;
  border-radius: var(--button-radius);
  border: none;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  transition: all var(--transition-normal);
  text-decoration: none;
}

.btn:active {
  transform: scale(0.98);
}

.btn-primary {
  background: linear-gradient(135deg, #6366f1, #4f46e5);
  color: white;
  box-shadow: 0 4px 14px rgba(99, 102, 241, 0.4);
}

.btn-primary:hover {
  background: linear-gradient(135deg, #4f46e5, #4338ca);
  box-shadow: 0 6px 18px rgba(99, 102, 241, 0.5);
  transform: translateY(-1px);
}

.btn-secondary {
  background: var(--bg-elevated);
  border: 1px solid var(--border-subtle);
  color: var(--text-main);
}

.btn-secondary:hover {
  background: var(--bg-card-hover);
  border-color: var(--border-glow);
}

.btn-warning {
  background: linear-gradient(135deg, #f59e0b, #d97706);
  color: white;
}

.btn-danger {
  background: rgba(239, 68, 68, 0.2);
  border: 1px solid rgba(239, 68, 68, 0.4);
  color: #f87171;
}

.btn-danger:hover {
  background: rgba(239, 68, 68, 0.3);
}

.btn-success {
  background: rgba(16, 185, 129, 0.2);
  border: 1px solid rgba(16, 185, 129, 0.4);
  color: #34d399;
}

.btn-success:hover {
  background: rgba(16, 185, 129, 0.3);
}

.btn-icon-action {
  background: transparent;
  border: 1px solid var(--border-subtle);
  color: var(--text-secondary);
  padding: 0.4rem 0.85rem;
  border-radius: var(--pill-radius);
  font-size: 0.82rem;
  font-weight: 600;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 0.35rem;
  transition: all var(--transition-fast);
}

.btn-icon-action.active {
  background: rgba(245, 158, 11, 0.2);
  color: #fbbf24;
  border-color: rgba(245, 158, 11, 0.5);
}

.highlight {
  background: rgba(245, 158, 11, 0.3);
  color: #ffffff;
  padding: 0.1rem 0.3rem;
  border-radius: 4px;
}

.hidden {
  display: none !important;
}

/* ==========================================================================
   RESPONSIVIDAD (MOBILE & TABLET)
   ========================================================================== */
@media (max-width: 1024px) {
  .simulator-layout {
    grid-template-columns: 1fr;
  }
  .simulator-sidebar {
    position: static;
  }
  .dash-two-column-layout {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 768px) {
  .header-container {
    flex-direction: column;
    align-items: stretch;
  }
  .main-nav-tabs {
    overflow-x: auto;
    white-space: nowrap;
    padding: 0.4rem;
  }
  .dash-hero-banner {
    padding: 1.5rem;
  }
  .flashcard-scene {
    height: 420px;
  }
  .flashcard-face {
    padding: 1.5rem;
  }
  .card-content-text {
    font-size: 1.15rem;
  }
  .secondary-calcs-row {
    grid-template-columns: 1fr;
  }
}