/**
 * CENTROMED - Estilos Principales
 * Centro de Especialidades Médicas El Eden
 * 
 * Framework CSS con sistema de temas (Dark/Light)
 * Escala de grises completa - Responsive Design
 * @version 1.0
 * @date 2025-10-22
 */

/* ==========================================
   VARIABLES CSS - SISTEMA DE TEMAS
   ========================================== */

:root {
  /* Tema Claro (Light) - Por defecto */
  --primary-color: #6B7280;
  --secondary-color: #9CA3AF;
  --background-color: #F9FAFB;
  --surface-color: #FFFFFF;
  --text-primary: #111827;
  --text-secondary: #6B7280;
  --border-color: #E5E7EB;
  --hover-color: #F3F4F6;
  --shadow: 0 1px 3px 0 rgba(0, 0, 0, 0.1), 0 1px 2px 0 rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
  
  /* Colores de estado */
  --success-color: #10B981;
  --warning-color: #F59E0B;
  --error-color: #EF4444;
  --info-color: #3B82F6;
  
  /* Espaciado */
  --spacing-xs: 0.25rem;
  --spacing-sm: 0.5rem;
  --spacing-md: 1rem;
  --spacing-lg: 1.5rem;
  --spacing-xl: 2rem;
  
  /* Border radius */
  --radius-sm: 0.25rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  
  /* Transiciones */
  --transition-fast: 0.15s ease-in-out;
  --transition-normal: 0.3s ease-in-out;
}

[data-theme="dark"] {
  /* Tema Oscuro (Dark) */
  --primary-color: #374151;
  --secondary-color: #4B5563;
  --background-color: #1F2937;
  --surface-color: #2D2D2D;
  --text-primary: #F9FAFB;
  --text-secondary: #9CA3AF;
  --border-color: #374151;
  --hover-color: #374151;
  --shadow: 0 1px 3px 0 rgba(0, 0, 0, 0.3), 0 1px 2px 0 rgba(0, 0, 0, 0.2);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.3), 0 4px 6px -2px rgba(0, 0, 0, 0.2);
}

/* ==========================================
   RESET Y BASE
   ========================================== */

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  background-color: var(--background-color);
  color: var(--text-primary);
  line-height: 1.6;
  transition: background-color var(--transition-normal), color var(--transition-normal);
}

/* ==========================================
   LAYOUT PRINCIPAL
   ========================================== */

.app-container {
  display: grid;
  grid-template-columns: 260px 1fr;
  grid-template-rows: auto 1fr;
  min-height: 100vh;
  transition: grid-template-columns var(--transition-normal);
}

.app-container.sidebar-collapsed {
  grid-template-columns: 60px 1fr;
}

/* ==========================================
   SIDEBAR
   ========================================== */

.sidebar {
  grid-column: 1;
  grid-row: 1 / -1;
  background-color: var(--surface-color);
  border-right: 1px solid var(--border-color);
  padding: var(--spacing-lg);
  overflow-y: auto;
  transition: all var(--transition-normal);
  box-shadow: var(--shadow);
}

.sidebar-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--spacing-xl);
  padding-bottom: var(--spacing-md);
  border-bottom: 1px solid var(--border-color);
}

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

.sidebar-logo i {
  font-size: 2rem;
  color: var(--primary-color);
}

.sidebar-logo h1 {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text-primary);
  transition: opacity var(--transition-fast);
}

.sidebar-collapsed .sidebar-logo h1,
.sidebar-collapsed .nav-text {
  opacity: 0;
  width: 0;
  overflow: hidden;
}

.sidebar-toggle {
  background: none;
  border: none;
  font-size: 1.25rem;
  color: var(--text-secondary);
  cursor: pointer;
  padding: var(--spacing-sm);
  transition: color var(--transition-fast);
}

.sidebar-toggle:hover {
  color: var(--text-primary);
}

/* Navegación */
.sidebar-nav {
  list-style: none;
}

.nav-item {
  margin-bottom: var(--spacing-sm);
}

.nav-link {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  padding: var(--spacing-md);
  color: var(--text-secondary);
  text-decoration: none;
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
  cursor: pointer;
}

.nav-link:hover {
  background-color: var(--hover-color);
  color: var(--text-primary);
}

.nav-link.active {
  background-color: var(--primary-color);
  color: white;
}

.nav-link i {
  font-size: 1.25rem;
  min-width: 1.25rem;
}

/* Submenús */
.nav-submenu {
  list-style: none;
  padding-left: var(--spacing-xl);
  margin-top: var(--spacing-sm);
  max-height: 0;
  overflow: hidden;
  transition: max-height var(--transition-normal);
}

.nav-submenu.active {
  max-height: 500px;
}

.nav-submenu .nav-link {
  font-size: 0.9rem;
  padding: var(--spacing-sm) var(--spacing-md);
}

/* ==========================================
   HEADER
   ========================================== */

.main-header {
  grid-column: 2;
  grid-row: 1;
  background-color: var(--surface-color);
  border-bottom: 1px solid var(--border-color);
  padding: var(--spacing-lg) var(--spacing-xl);
  display: flex;
  align-items: center;
  justify-content: space-between;
  box-shadow: var(--shadow);
}

.header-left {
  display: flex;
  align-items: center;
  gap: var(--spacing-lg);
}

.breadcrumb {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  color: var(--text-secondary);
  font-size: 0.9rem;
}

.breadcrumb-item {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
}

.breadcrumb-separator {
  color: var(--border-color);
}

.header-right {
  display: flex;
  align-items: center;
  gap: var(--spacing-lg);
}

.theme-toggle {
  background: none;
  border: none;
  font-size: 1.25rem;
  color: var(--text-secondary);
  cursor: pointer;
  padding: var(--spacing-sm);
  transition: color var(--transition-fast);
}

.theme-toggle:hover {
  color: var(--text-primary);
}

.user-menu {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  padding: var(--spacing-sm) var(--spacing-md);
  border-radius: var(--radius-md);
  background-color: var(--hover-color);
  cursor: pointer;
}

.user-avatar {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background-color: var(--primary-color);
  color: white;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 600;
}

/* ==========================================
   MAIN CONTENT
   ========================================== */

.main-content {
  grid-column: 2;
  grid-row: 2;
  padding: var(--spacing-xl);
  overflow-y: auto;
}

.content-header {
  margin-bottom: var(--spacing-xl);
}

.content-title {
  font-size: 1.75rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: var(--spacing-sm);
}

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

/* ==========================================
   CARDS Y COMPONENTES
   ========================================== */

.card {
  background-color: var(--surface-color);
  border-radius: var(--radius-lg);
  padding: var(--spacing-lg);
  box-shadow: var(--shadow);
  transition: box-shadow var(--transition-fast);
}

.card:hover {
  box-shadow: var(--shadow-lg);
}

.card-header {
  padding-bottom: var(--spacing-md);
  margin-bottom: var(--spacing-md);
  border-bottom: 1px solid var(--border-color);
}

.card-title {
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--text-primary);
}

.card-body {
  color: var(--text-primary);
}

/* Grid de cards */
.cards-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--spacing-lg);
  margin-bottom: var(--spacing-xl);
}

/* ==========================================
   BOTONES
   ========================================== */

.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-sm) var(--spacing-lg);
  border: none;
  border-radius: var(--radius-md);
  font-size: 0.9rem;
  font-weight: 500;
  cursor: pointer;
  transition: all var(--transition-fast);
  text-decoration: none;
}

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

.btn-primary:hover {
  opacity: 0.9;
  transform: translateY(-1px);
}

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

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

.btn-danger {
  background-color: var(--error-color);
  color: white;
}

.btn-outline {
  background-color: transparent;
  border: 1px solid var(--border-color);
  color: var(--text-primary);
}

.btn-outline:hover {
  background-color: var(--hover-color);
}

/* ==========================================
   FORMULARIOS
   ========================================== */

.form-group {
  margin-bottom: var(--spacing-lg);
}

.form-label {
  display: block;
  margin-bottom: var(--spacing-sm);
  color: var(--text-primary);
  font-weight: 500;
  font-size: 0.9rem;
}

.form-control {
  width: 100%;
  padding: var(--spacing-sm) var(--spacing-md);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  background-color: var(--surface-color);
  color: var(--text-primary);
  font-size: 0.9rem;
  transition: border-color var(--transition-fast);
}

.form-control:focus {
  outline: none;
  border-color: var(--primary-color);
}

.form-control::placeholder {
  color: var(--text-secondary);
}

/* ==========================================
   TABLAS
   ========================================== */

.table-container {
  overflow-x: auto;
}

.table {
  width: 100%;
  border-collapse: collapse;
}

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

.table th {
  padding: var(--spacing-md);
  text-align: left;
  font-weight: 600;
  color: var(--text-primary);
  border-bottom: 2px solid var(--border-color);
}

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

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

/* ==========================================
   BADGES Y ESTADOS
   ========================================== */

.badge {
  display: inline-block;
  padding: var(--spacing-xs) var(--spacing-sm);
  border-radius: var(--radius-sm);
  font-size: 0.75rem;
  font-weight: 600;
}

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

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

.badge-error {
  background-color: var(--error-color);
  color: white;
}

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

/* ==========================================
   RESPONSIVE
   ========================================== */

@media (max-width: 768px) {
  .app-container {
    grid-template-columns: 1fr;
  }
  
  .sidebar {
    position: fixed;
    left: -260px;
    top: 0;
    bottom: 0;
    z-index: 1000;
    width: 260px;
  }
  
  .sidebar.active {
    left: 0;
  }
  
  .main-header {
    grid-column: 1;
  }
  
  .main-content {
    grid-column: 1;
    padding: var(--spacing-md);
  }
  
  .cards-grid {
    grid-template-columns: 1fr;
  }
}

/* ==========================================
   UTILIDADES
   ========================================== */

.text-center { text-align: center; }
.text-right { text-align: right; }
.text-muted { color: var(--text-secondary); }
.mt-1 { margin-top: var(--spacing-sm); }
.mt-2 { margin-top: var(--spacing-md); }
.mt-3 { margin-top: var(--spacing-lg); }
.mb-1 { margin-bottom: var(--spacing-sm); }
.mb-2 { margin-bottom: var(--spacing-md); }
.mb-3 { margin-bottom: var(--spacing-lg); }
.d-flex { display: flex; }
.justify-between { justify-content: space-between; }
.align-center { align-items: center; }
.gap-1 { gap: var(--spacing-sm); }
.gap-2 { gap: var(--spacing-md); }