/* ============================================
   CriticaHistory - Estilos Globales
   Sistema Educativo de Pensamiento Crítico
   ============================================ */

:root {
  /* Paleta de Colores */
  --color-primary: #2C3E50;
  --color-primary-light: #34495E;
  --color-secondary: #16A085;
  --color-secondary-light: #1ABC9C;
  --color-accent: #E67E22;
  --color-accent-light: #F39C12;
  
  /* Colores de Feedback */
  --color-success: #27AE60;
  --color-success-light: #D5F4E6;
  --color-warning: #F39C12;
  --color-warning-light: #FEF5E7;
  --color-info: #3498DB;
  --color-info-light: #EBF5FB;
  --color-danger: #E74C3C;
  --color-danger-light: #FDECEA;

  /* Colores Neutrales */
  --color-bg: #F8F9FA;
  --color-bg-card: #FFFFFF;
  --color-text: #2C3E50;
  --color-text-light: #7F8C8D;
  --color-border: #ECF0F1;
  --color-border-dark: #BDC3C7;
  
  /* Tipografía */
  --font-primary: 'Inter', 'Roboto', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-size-xs: 0.75rem;
  --font-size-sm: 0.875rem;
  --font-size-base: 1rem;
  --font-size-lg: 1.125rem;
  --font-size-xl: 1.25rem;
  --font-size-2xl: 1.5rem;
  --font-size-3xl: 1.875rem;
  --font-size-4xl: 2.25rem;
  
  /* Espaciado */
  --spacing-xs: 0.25rem;
  --spacing-sm: 0.5rem;
  --spacing-md: 1rem;
  --spacing-lg: 1.5rem;
  --spacing-xl: 2rem;
  --spacing-2xl: 3rem;
  --spacing-3xl: 4rem;
  
  /* Bordes y Sombras */
  --border-radius-sm: 0.375rem;
  --border-radius-md: 0.5rem;
  --border-radius-lg: 0.75rem;
  --border-radius-xl: 1rem;
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
  
  /* Transiciones */
  --transition-fast: 150ms ease-in-out;
  --transition-normal: 300ms ease-in-out;
  --transition-slow: 500ms ease-in-out;
}

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

html {
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-primary);
  font-size: var(--font-size-base);
  line-height: 1.6;
  color: var(--color-text);
  background-color: var(--color-bg);
  min-height: 100vh;
}

/* Tipografía */
h1, h2, h3, h4, h5, h6 {
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: var(--spacing-md);
  color: var(--color-primary);
}

h1 { font-size: var(--font-size-4xl); }
h2 { font-size: var(--font-size-3xl); }
h3 { font-size: var(--font-size-2xl); }
h4 { font-size: var(--font-size-xl); }
h5 { font-size: var(--font-size-lg); }
h6 { font-size: var(--font-size-base); }

p {
  margin-bottom: var(--spacing-md);
  color: var(--color-text);
}

a {
  color: var(--color-secondary);
  text-decoration: none;
  transition: color var(--transition-fast);
}

a:hover {
  color: var(--color-secondary-light);
}

/* Layout Principal */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--spacing-lg);
}

.container-fluid {
  width: 100%;
  padding: 0 var(--spacing-lg);
}

/* Header */
.header {
  background-color: var(--color-bg-card);
  box-shadow: var(--shadow-sm);
  padding: var(--spacing-lg) 0;
  position: sticky;
  top: 0;
  z-index: 1000;
}

.header-content {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: center;
  gap: var(--spacing-lg);
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 var(--spacing-lg);
}

.logo-container {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
}

.logo {
  width: 48px;
  height: 48px;
}

.brand-name {
  font-size: var(--font-size-2xl);
  font-weight: 700;
  color: var(--color-primary);
  margin: 0;
}

/* Navegación */
.nav {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: var(--spacing-sm) var(--spacing-md);
  list-style: none;
  align-items: center;
}

.nav-link {
  font-size: var(--font-size-base);
  font-weight: 500;
  color: var(--color-text-light);
  padding: var(--spacing-sm) var(--spacing-sm);
  border-radius: var(--border-radius-md);
  transition: all var(--transition-fast);
  white-space: nowrap;
}

.nav-link:hover {
  color: var(--color-secondary);
  background-color: var(--color-border);
}

.nav-link.active {
  color: var(--color-secondary);
  background-color: var(--color-border);
  font-weight: 600;
}

/* User Info */
.user-info {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  padding: var(--spacing-sm) var(--spacing-md);
  background-color: var(--color-border);
  border-radius: var(--border-radius-lg);
  flex-shrink: 0;
}

.user-avatar {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--color-secondary), var(--color-accent));
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-weight: 600;
  font-size: var(--font-size-lg);
  flex-shrink: 0;
}

.user-name {
  font-weight: 600;
  color: var(--color-primary);
  font-size: var(--font-size-sm);
  white-space: nowrap;
}

.user-info .btn {
  white-space: nowrap;
  flex-shrink: 0;
}

/* Menu desplegable del perfil (avatar -> Cambiar contraseña / Cerrar sesion) */
.user-menu {
  position: relative;
  flex-shrink: 0;
}

.user-menu-trigger {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  background: none;
  border: none;
  cursor: pointer;
  padding: var(--spacing-xs);
  border-radius: var(--border-radius-md);
  font-family: var(--font-primary);
  transition: background-color var(--transition-fast);
}

.user-menu-trigger:hover {
  background-color: var(--color-border-dark);
}

.user-menu-caret {
  color: var(--color-text-light);
  font-size: 0.7em;
  transition: transform var(--transition-fast);
}

.user-menu-trigger[aria-expanded="true"] .user-menu-caret {
  transform: rotate(180deg);
}

.user-menu-dropdown {
  position: absolute;
  top: calc(100% + var(--spacing-sm));
  right: 0;
  min-width: 220px;
  background: white;
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius-lg);
  box-shadow: var(--shadow-lg);
  padding: var(--spacing-sm);
  display: flex;
  flex-direction: column;
  gap: var(--spacing-xs);
  z-index: 100;
}

.user-menu-dropdown[hidden] {
  display: none;
}

.user-menu-name-label {
  padding: var(--spacing-sm) var(--spacing-md);
  font-weight: 600;
  color: var(--color-primary);
  font-size: var(--font-size-sm);
  border-bottom: 1px solid var(--color-border);
  margin-bottom: var(--spacing-xs);
  white-space: nowrap;
}

.user-menu-dropdown .btn {
  background: none;
  color: var(--color-text);
  justify-content: flex-start;
  width: 100%;
  padding: var(--spacing-sm) var(--spacing-md);
  font-weight: 500;
}

.user-menu-dropdown .btn:hover {
  background-color: var(--color-bg);
}

/* Paginacion de listas (estudiantes, actividades, respuestas...) */
.pagination-controls {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-lg);
  margin-top: var(--spacing-xl);
  flex-wrap: wrap;
}

.pagination-controls .btn {
  padding: var(--spacing-sm) var(--spacing-lg);
}

.pagination-controls .btn:disabled {
  opacity: 0.4;
}

.pagination-info {
  color: var(--color-text-light);
  font-size: var(--font-size-sm);
  white-space: nowrap;
}

/* Encabezado de pagina: titulo + descripcion a la izquierda, acciones a la
   derecha (boton "Nuevo X", contador, exportar...). Antes cada pagina lo
   resolvia distinto (.page-header con space-between, .toolbar con .spacer,
   o directamente sin envoltorio); ahora es un solo patron. */
.toolbar {
  display: flex;
  gap: var(--spacing-md);
  flex-wrap: wrap;
  align-items: center;
  margin-bottom: var(--spacing-xl);
}

.toolbar .spacer {
  flex: 1;
}

.toolbar h1 {
  margin: 0;
}

.toolbar p {
  margin: 0;
  color: var(--color-text-light);
}

/* Barra de filtros: mismo contenedor (tarjeta blanca) en Estudiantes,
   Actividades, Reportes y Usuarios. `.search-box` es el campo que debe verse
   mas ancho que el resto (buscador de texto libre). */
.filters-bar {
  background: white;
  padding: var(--spacing-xl);
  border-radius: var(--border-radius-lg);
  box-shadow: var(--shadow-sm);
  margin-bottom: var(--spacing-xl);
  display: flex;
  flex-wrap: wrap;
  align-items: flex-end;
  gap: var(--spacing-lg);
}

.filters-bar .form-group {
  margin: 0;
  flex: 1 1 180px;
}

.filters-bar .search-box {
  flex: 2 1 260px;
}

/* Tarjetas de entidad (estudiante/actividad/respuesta): mismo tratamiento
   visual base -- cada pagina solo varia el lado del borde de acento y si
   es clickeable. Antes las 3 tenian su propio bloque CSS ligeramente
   distinto (padding, hover, radio) repetido por pagina. */
.student-card,
.activity-card,
.response-card {
  background: white;
  border-radius: var(--border-radius-lg);
  box-shadow: var(--shadow-md);
  padding: var(--spacing-xl);
  transition: all var(--transition-normal);
}

.student-card {
  border-top: 4px solid var(--color-secondary);
  cursor: pointer;
}

.student-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

.activity-card,
.response-card {
  border-left: 6px solid var(--color-secondary);
  margin-bottom: var(--spacing-lg);
}

.response-card {
  cursor: pointer;
}

.response-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

.activity-card.publicada { border-left-color: var(--color-success); }
.activity-card.borrador { border-left-color: var(--color-warning); }
.activity-card.archivada { border-left-color: var(--color-info); }

/* Main Content */
.main-content {
  max-width: 1400px;
  margin: 0 auto;
  padding: var(--spacing-2xl) var(--spacing-lg);
  min-height: calc(100vh - 100px);
}

/* Cards */
.card {
  background-color: var(--color-bg-card);
  border-radius: var(--border-radius-lg);
  box-shadow: var(--shadow-md);
  padding: var(--spacing-xl);
  margin-bottom: var(--spacing-xl);
  transition: all var(--transition-normal);
}

.card:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-2px);
}

.card-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--spacing-lg);
  padding-bottom: var(--spacing-md);
  border-bottom: 2px solid var(--color-border);
}

.card-title {
  font-size: var(--font-size-xl);
  font-weight: 700;
  color: var(--color-primary);
  margin: 0;
}

.card-body {
  padding: var(--spacing-md) 0;
}

/* Grid System */
.grid {
  display: grid;
  gap: var(--spacing-xl);
}

.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }

/* Botones */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-md) var(--spacing-xl);
  font-size: var(--font-size-base);
  font-weight: 600;
  border-radius: var(--border-radius-md);
  border: none;
  cursor: pointer;
  transition: all var(--transition-fast);
  text-decoration: none;
  font-family: var(--font-primary);
}

.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.btn-primary {
  background-color: var(--color-secondary);
  color: white;
}

.btn-primary:hover:not(:disabled) {
  background-color: var(--color-secondary-light);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.btn-accent {
  background-color: var(--color-accent);
  color: white;
  font-size: var(--font-size-lg);
  padding: var(--spacing-lg) var(--spacing-2xl);
}

.btn-accent:hover:not(:disabled) {
  background-color: var(--color-accent-light);
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

.btn-secondary {
  background-color: var(--color-border);
  color: var(--color-text);
}

.btn-secondary:hover:not(:disabled) {
  background-color: var(--color-border-dark);
}

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

.btn-outline:hover:not(:disabled) {
  background-color: var(--color-secondary);
  color: white;
}

/* Badges */
.badge {
  display: inline-flex;
  align-items: center;
  padding: var(--spacing-xs) var(--spacing-md);
  border-radius: var(--border-radius-lg);
  font-size: var(--font-size-sm);
  font-weight: 600;
}

.badge-success {
  background-color: var(--color-success-light);
  color: var(--color-success);
}

.badge-warning {
  background-color: var(--color-warning-light);
  color: var(--color-warning);
}

.badge-info {
  background-color: var(--color-info-light);
  color: var(--color-info);
}

.badge-danger {
  background-color: var(--color-danger-light);
  color: var(--color-danger);
}

/* Para alertas que de verdad necesitan destacar sobre el resto de badges
   (ej. "vence pronto"): fondo solido en vez del pastel de .badge-warning,
   para no confundirse con estados pasivos que comparten el mismo color. */
.badge-urgent {
  background-color: var(--color-warning);
  color: white;
}

/* Progress Bar */
.progress-container {
  width: 100%;
  height: 12px;
  background-color: var(--color-border);
  border-radius: var(--border-radius-lg);
  overflow: hidden;
  position: relative;
}

.progress-bar {
  height: 100%;
  background: linear-gradient(90deg, var(--color-secondary), var(--color-secondary-light));
  border-radius: var(--border-radius-lg);
  transition: width var(--transition-slow);
  position: relative;
  overflow: hidden;
}

.progress-bar::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  bottom: 0;
  right: 0;
  background-image: linear-gradient(
    -45deg,
    rgba(255, 255, 255, 0.2) 25%,
    transparent 25%,
    transparent 50%,
    rgba(255, 255, 255, 0.2) 50%,
    rgba(255, 255, 255, 0.2) 75%,
    transparent 75%,
    transparent
  );
  background-size: 50px 50px;
}

/* Input y Textarea */
.form-group {
  margin-bottom: var(--spacing-lg);
}

.form-label {
  display: block;
  margin-bottom: var(--spacing-sm);
  font-weight: 600;
  color: var(--color-primary);
  font-size: var(--font-size-base);
}

.form-input,
.form-textarea,
.form-select {
  width: 100%;
  padding: var(--spacing-md);
  border: 2px solid var(--color-border);
  border-radius: var(--border-radius-md);
  font-size: var(--font-size-base);
  font-family: var(--font-primary);
  transition: all var(--transition-fast);
  background-color: var(--color-bg-card);
}

.form-input:focus,
.form-textarea:focus,
.form-select:focus {
  outline: none;
  border-color: var(--color-secondary);
  box-shadow: 0 0 0 3px rgba(22, 160, 133, 0.1);
}

.form-textarea {
  min-height: 200px;
  resize: vertical;
  line-height: 1.8;
}

/* Iconos (usando Unicode y emojis) */
.icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 24px;
  height: 24px;
}

.icon-lg {
  width: 48px;
  height: 48px;
  font-size: var(--font-size-3xl);
}

/* Stats */
.stat-card {
  background: linear-gradient(135deg, var(--color-secondary), var(--color-secondary-light));
  color: white;
  padding: var(--spacing-xl);
  border-radius: var(--border-radius-lg);
  box-shadow: var(--shadow-md);
}

.stat-value {
  font-size: var(--font-size-4xl);
  font-weight: 700;
  margin-bottom: var(--spacing-xs);
}

.stat-label {
  font-size: var(--font-size-base);
  opacity: 0.9;
}

/* Tabla */
.table-container {
  overflow-x: auto;
  border-radius: var(--border-radius-lg);
  box-shadow: var(--shadow-md);
}

.table {
  width: 100%;
  border-collapse: collapse;
  background-color: var(--color-bg-card);
}

.table thead {
  background-color: var(--color-primary);
  color: white;
}

.table th {
  padding: var(--spacing-md);
  text-align: left;
  font-weight: 600;
  font-size: var(--font-size-sm);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.table td {
  padding: var(--spacing-md);
  border-bottom: 1px solid var(--color-border);
}

.table tbody tr {
  transition: background-color var(--transition-fast);
}

.table tbody tr:hover {
  background-color: var(--color-border);
}

/* Utilidades */
.text-center { text-align: center; }
.text-right { text-align: right; }
.text-muted { color: var(--color-text-light); }
.text-success { color: var(--color-success); }
.text-warning { color: var(--color-warning); }
.text-danger { color: var(--color-danger); }

.mt-1 { margin-top: var(--spacing-md); }
.mt-2 { margin-top: var(--spacing-xl); }
.mb-1 { margin-bottom: var(--spacing-md); }
.mb-2 { margin-bottom: var(--spacing-xl); }

.hidden { display: none; }

/* Loading Spinner */
.spinner {
  width: 40px;
  height: 40px;
  border: 4px solid var(--color-border);
  border-top-color: var(--color-secondary);
  border-radius: 50%;
  animation: spin 1s linear infinite;
}

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

/* Responsive */
@media (max-width: 1024px) {
  .grid-2,
  .grid-3,
  .grid-4 {
    grid-template-columns: 1fr;
  }
  
  .nav {
    gap: var(--spacing-md);
  }
}

@media (max-width: 768px) {
  .header-content {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
  }
  
  .main-content {
    padding: var(--spacing-lg) var(--spacing-md);
  }
}