/* =========================================================
   MODERN WHATSAPP SENDER PRO - CSS FRAMEWORK
   Advanced Design System with Animations & Interactions
   ========================================================= */

/* =========== IMPORTS & FONTS =========== */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800;900&display=swap');

/* =========== CSS CUSTOM PROPERTIES =========== */
:root {
  /* Core Colors */
  --primary-500: #25d366;
  --primary-600: #20bd5a;
  --primary-700: #1ba64e;
  --primary-800: #168f42;
  --primary-900: #117836;
  
  /* WhatsApp Brand */
  --whatsapp-green: #25d366;
  --whatsapp-dark: #075e54;
  --whatsapp-light: #dcf8c6;
  
  /* Semantic Colors */
  --success-50: #f0fdf4;
  --success-500: #22c55e;
  --success-600: #16a34a;
  --warning-500: #f59e0b;
  --error-500: #ef4444;
  --info-500: #3b82f6;
  
  /* Typography */
  --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-weight-light: 300;
  --font-weight-regular: 400;
  --font-weight-medium: 500;
  --font-weight-semibold: 600;
  --font-weight-bold: 700;
  --font-weight-extrabold: 800;
  --font-weight-black: 900;
  
  /* Spacing */
  --spacing-xs: 0.25rem;
  --spacing-sm: 0.5rem;
  --spacing-md: 1rem;
  --spacing-lg: 1.5rem;
  --spacing-xl: 2rem;
  --spacing-2xl: 3rem;
  --spacing-3xl: 4rem;
  
  /* Radius */
  --radius-sm: 0.375rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;
  --radius-2xl: 1.5rem;
  --radius-full: 9999px;
  
  /* Shadows */
  --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
  --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
  --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
  --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.1), 0 8px 10px -6px rgb(0 0 0 / 0.1);
  --shadow-2xl: 0 25px 50px -12px rgb(0 0 0 / 0.25);
  
  /* Transitions */
  --transition-fast: 150ms ease-in-out;
  --transition-normal: 300ms ease-in-out;
  --transition-slow: 500ms ease-in-out;
  
  /* Z-Index Scale */
  --z-dropdown: 1000;
  --z-sticky: 1020;
  --z-fixed: 1030;
  --z-modal-backdrop: 1040;
  --z-modal: 1050;
  --z-popover: 1060;
  --z-tooltip: 1070;
  --z-toast: 1080;
}

/* =========== THEME VARIABLES =========== */
[data-theme="dark"] {
  --bg-primary: #0a0e15;
  --bg-secondary: #0f1419;
  --bg-tertiary: #1a1f2e;
  --bg-elevated: #1e2531;
  --bg-overlay: rgba(0, 0, 0, 0.8);
  
  --text-primary: #f8fafc;
  --text-secondary: #cbd5e1;
  --text-tertiary: #94a3b8;
  --text-quaternary: #64748b;
  --text-disabled: #475569;
  
  --border-primary: rgba(148, 163, 184, 0.1);
  --border-secondary: rgba(148, 163, 184, 0.2);
  --border-focus: var(--primary-500);
  
  --card-bg: linear-gradient(145deg, #1a1f2e, #0f1419);
  --card-border: rgba(148, 163, 184, 0.1);
  --card-shadow: 0 20px 40px rgba(0, 0, 0, 0.4), 0 8px 20px rgba(0, 0, 0, 0.3);
  
  --input-bg: #1a1f2e;
  --input-border: rgba(148, 163, 184, 0.2);
  --input-focus-bg: #1e2531;
  --input-placeholder: #64748b;
  
  --navbar-bg: rgba(15, 20, 25, 0.95);
  --navbar-backdrop: blur(20px) saturate(180%);
}

[data-theme="light"] {
  --bg-primary: #f8fafc;
  --bg-secondary: #ffffff;
  --bg-tertiary: #f1f5f9;
  --bg-elevated: #ffffff;
  --bg-overlay: rgba(0, 0, 0, 0.5);
  
  --text-primary: #0f172a;
  --text-secondary: #334155;
  --text-tertiary: #64748b;
  --text-quaternary: #94a3b8;
  --text-disabled: #cbd5e1;
  
  --border-primary: rgba(15, 23, 42, 0.1);
  --border-secondary: rgba(15, 23, 42, 0.2);
  --border-focus: var(--primary-500);
  
  --card-bg: linear-gradient(145deg, #ffffff, #f8fafc);
  --card-border: rgba(15, 23, 42, 0.1);
  --card-shadow: 0 10px 30px rgba(0, 0, 0, 0.08), 0 4px 15px rgba(0, 0, 0, 0.05);
  
  --input-bg: #ffffff;
  --input-border: rgba(15, 23, 42, 0.2);
  --input-focus-bg: #ffffff;
  --input-placeholder: #94a3b8;
  
  --navbar-bg: rgba(248, 250, 252, 0.95);
  --navbar-backdrop: blur(20px) saturate(180%);
}

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
  height: 100%;
}

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

/* Background Patterns */
body::before {
  content: '';
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: 
    radial-gradient(circle at 20% 80%, rgba(37, 211, 102, 0.1) 0%, transparent 50%),
    radial-gradient(circle at 80% 20%, rgba(37, 211, 102, 0.08) 0%, transparent 50%),
    radial-gradient(circle at 40% 40%, rgba(37, 211, 102, 0.05) 0%, transparent 50%);
  pointer-events: none;
  z-index: -1;
}

/* =========== LOADING SCREEN =========== */
.loading-screen {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: var(--bg-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: var(--z-modal);
  opacity: 1;
  transition: opacity var(--transition-slow), visibility var(--transition-slow);
}

.loading-screen.hide {
  opacity: 0;
  visibility: hidden;
}

.loading-content {
  text-align: center;
  transform: translateY(-20px);
}

.loading-logo {
  font-size: 4rem;
  color: var(--primary-500);
  margin-bottom: var(--spacing-lg);
  animation: pulse 2s ease-in-out infinite;
}

.loading-text {
  font-size: 1.5rem;
  font-weight: var(--font-weight-bold);
  color: var(--text-primary);
  margin-bottom: var(--spacing-xl);
}

.loading-spinner {
  display: flex;
  justify-content: center;
}

.spinner-ring {
  width: 40px;
  height: 40px;
  border: 3px solid var(--border-primary);
  border-top-color: var(--primary-500);
  border-radius: var(--radius-full);
  animation: spin 1s linear infinite;
}

@keyframes pulse {
  0%, 100% { transform: scale(1); opacity: 1; }
  50% { transform: scale(1.1); opacity: 0.8; }
}

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

/* =========== NAVIGATION =========== */
.navbar {
  background: var(--navbar-bg) !important;
  backdrop-filter: var(--navbar-backdrop);
  -webkit-backdrop-filter: var(--navbar-backdrop);
  border-bottom: 1px solid var(--border-primary);
  padding: var(--spacing-sm) 0;
  transition: all var(--transition-normal);
}

.navbar-brand {
  display: flex;
  align-items: center;
  text-decoration: none;
  color: var(--text-primary) !important;
  font-weight: var(--font-weight-bold);
  font-size: 1.25rem;
}

.brand-icon {
  width: 40px;
  height: 40px;
  background: linear-gradient(135deg, var(--primary-500), var(--primary-600));
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-size: 1.25rem;
  margin-right: var(--spacing-sm);
  box-shadow: var(--shadow-md);
}

.brand-text {
  background: linear-gradient(135deg, var(--primary-500), var(--primary-700));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* Connection Status */
.connection-status {
  display: flex;
  align-items: center;
  padding: var(--spacing-xs) var(--spacing-sm);
  border-radius: var(--radius-full);
  border: 1px solid var(--border-secondary);
  background: var(--bg-elevated);
  backdrop-filter: blur(10px);
  transition: all var(--transition-normal);
}

.status-indicator {
  width: 8px;
  height: 8px;
  border-radius: var(--radius-full);
  background: var(--error-500);
  margin-right: var(--spacing-xs);
  animation: pulse 2s ease-in-out infinite;
}

.connection-status.connected .status-indicator {
  background: var(--success-500);
}

.status-text {
  font-size: 0.875rem;
  font-weight: var(--font-weight-medium);
  color: var(--text-secondary);
}

/* User Info */
.user-info {
  display: flex;
  align-items: center;
  padding: var(--spacing-xs) var(--spacing-sm);
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-secondary);
  background: var(--bg-elevated);
  backdrop-filter: blur(10px);
  transition: all var(--transition-normal);
}

.user-avatar {
  margin-right: var(--spacing-sm);
  color: var(--primary-500);
  font-size: 1.25rem;
}

.user-details {
  display: flex;
  flex-direction: column;
  min-width: 120px;
}

.user-name {
  font-size: 0.875rem;
  font-weight: var(--font-weight-medium);
  color: var(--text-primary);
  line-height: 1.2;
}

.user-email {
  font-size: 0.75rem;
  color: var(--text-secondary);
  opacity: 0.8;
  line-height: 1.2;
}

.user-actions {
  margin-left: var(--spacing-sm);
  display: flex;
  align-items: center;
}

.btn-logout {
  background: none;
  border: none;
  padding: var(--spacing-xs);
  border-radius: var(--radius-md);
  color: var(--text-secondary);
  cursor: pointer;
  transition: all var(--transition-normal);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1rem;
  pointer-events: auto;
  z-index: 1000;
  position: relative;
}

.btn-logout:hover {
  background: var(--bg-tertiary);
  color: var(--danger-500);
  transform: translateY(-1px);
}

.btn-logout:active {
  transform: translateY(0);
}

[data-theme="light"] .btn-logout:hover {
  background: var(--gray-100);
  color: var(--danger-600);
}

/* WhatsApp logout button styles */
#logout-whatsapp-btn {
  background: linear-gradient(135deg, #ff8c00, #ff6b00);
  border: 1px solid rgba(255, 140, 0, 0.3);
  color: white;
  font-size: 0.875rem;
  padding: 0.375rem 0.75rem;
  border-radius: var(--radius-md);
  transition: all var(--transition-normal);
  position: relative;
  overflow: hidden;
}

#logout-whatsapp-btn:hover {
  background: linear-gradient(135deg, #ff6b00, #ff4500);
  border-color: rgba(255, 75, 0, 0.5);
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(255, 140, 0, 0.3);
}

#logout-whatsapp-btn:active {
  transform: translateY(0);
  box-shadow: 0 2px 6px rgba(255, 140, 0, 0.2);
}

#logout-whatsapp-btn .bi-whatsapp {
  color: #25d366;
  filter: drop-shadow(0 0 2px rgba(37, 211, 102, 0.5));
}

#logout-whatsapp-btn .bi-x-circle-fill {
  color: #ff4444;
  margin-left: 0.25rem;
}

/* Dark theme adjustments */
[data-theme="dark"] #logout-whatsapp-btn {
  background: linear-gradient(135deg, #ff8c00, #ff6b00);
  border-color: rgba(255, 140, 0, 0.4);
  box-shadow: 0 2px 8px rgba(255, 140, 0, 0.2);
}

[data-theme="dark"] #logout-whatsapp-btn:hover {
  box-shadow: 0 4px 16px rgba(255, 140, 0, 0.4);
}

/* Theme Toggle */
.theme-toggle {
  margin-left: var(--spacing-md);
}

.theme-switch-checkbox {
  display: none;
}

.theme-switch-label {
  display: block;
  width: 60px;
  height: 30px;
  background: var(--bg-tertiary);
  border-radius: var(--radius-full);
  position: relative;
  cursor: pointer;
  transition: background-color var(--transition-normal);
  border: 1px solid var(--border-secondary);
}

.theme-switch-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 8px;
  height: 100%;
  font-size: 0.75rem;
  color: var(--text-tertiary);
}

.theme-switch-switch {
  position: absolute;
  top: 2px;
  left: 2px;
  width: 24px;
  height: 24px;
  background: var(--primary-500);
  border-radius: var(--radius-full);
  transition: transform var(--transition-normal);
  box-shadow: var(--shadow-sm);
}

.theme-switch-checkbox:checked + .theme-switch-label .theme-switch-switch {
  transform: translateX(30px);
}

/* =========== ALERT SYSTEM =========== */
.alert-container {
  position: fixed;
  top: 100px;
  right: var(--spacing-lg);
  z-index: var(--z-toast);
  max-width: 400px;
}

.alert-toast {
  background: var(--bg-elevated);
  border: 1px solid var(--border-secondary);
  border-radius: var(--radius-lg);
  padding: var(--spacing-md);
  margin-bottom: var(--spacing-sm);
  box-shadow: var(--shadow-xl);
  backdrop-filter: blur(20px);
  animation: slideInRight 0.3s ease-out;
  display: flex;
  align-items: center;
  color: var(--text-primary);
}

.alert-toast.success { border-left: 4px solid var(--success-500); }
.alert-toast.error { border-left: 4px solid var(--error-500); }
.alert-toast.warning { border-left: 4px solid var(--warning-500); }
.alert-toast.info { border-left: 4px solid var(--info-500); }

.alert-icon {
  margin-right: var(--spacing-sm);
  font-size: 1.25rem;
}

.alert-content {
  flex: 1;
}

.alert-title {
  font-weight: var(--font-weight-semibold);
  margin-bottom: var(--spacing-xs);
}

.alert-message {
  font-size: 0.875rem;
  color: var(--text-secondary);
}

@keyframes slideInRight {
  from {
    transform: translateX(100%);
    opacity: 0;
  }
  to {
    transform: translateX(0);
    opacity: 1;
  }
}

/* =========== MAIN CONTENT =========== */
.main-content {
  padding-top: 100px;
  min-height: calc(100vh - 200px);
  padding-bottom: var(--spacing-xl);
}

/* =========== HERO SECTION =========== */
.hero-section {
  text-align: center;
  padding: var(--spacing-3xl) 0;
  position: relative;
}

.hero-content {
  max-width: 800px;
  margin: 0 auto;
}

.hero-title {
  font-size: clamp(2.5rem, 5vw, 4rem);
  font-weight: var(--font-weight-black);
  line-height: 1.1;
  margin-bottom: var(--spacing-lg);
  color: var(--text-primary);
}

.title-highlight {
  background: linear-gradient(135deg, var(--primary-500), var(--primary-700));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-subtitle {
  font-size: 1.25rem;
  color: var(--text-secondary);
  margin-bottom: var(--spacing-2xl);
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}

.hero-stats {
  display: flex;
  justify-content: center;
  gap: var(--spacing-xl);
  margin-top: var(--spacing-2xl);
  flex-wrap: wrap;
}

.stat-item {
  text-align: center;
  padding: var(--spacing-md);
}

.stat-number {
  font-size: 2rem;
  font-weight: var(--font-weight-bold);
  color: var(--primary-500);
  line-height: 1;
}

.stat-label {
  font-size: 0.875rem;
  color: var(--text-tertiary);
  margin-top: var(--spacing-xs);
}

.stat-divider {
  width: 1px;
  background: var(--border-primary);
  margin: var(--spacing-md) 0;
}

/* =========== TAB NAVIGATION =========== */
.tab-navigation {
  margin-bottom: var(--spacing-2xl);
}

.tab-nav-container {
  display: flex;
  gap: var(--spacing-md);
  justify-content: center;
  background: var(--bg-elevated);
  padding: var(--spacing-sm);
  border-radius: var(--radius-xl);
  border: 1px solid var(--border-primary);
  backdrop-filter: blur(10px);
  max-width: fit-content;
  margin: 0 auto;
  box-shadow: var(--shadow-lg);
}

.tab-nav-btn {
  display: flex;
  align-items: center;
  padding: var(--spacing-md) var(--spacing-lg);
  border: none;
  background: transparent;
  border-radius: var(--radius-lg);
  cursor: pointer;
  transition: all var(--transition-normal);
  text-decoration: none;
  color: var(--text-secondary);
  min-width: 180px;
  position: relative;
  overflow: hidden;
}

.tab-nav-btn::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(135deg, var(--primary-500), var(--primary-600));
  opacity: 0;
  transition: opacity var(--transition-normal);
  z-index: -1;
}

.tab-nav-btn.active::before {
  opacity: 1;
}

.tab-nav-btn.active {
  color: white;
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

.tab-nav-btn:hover:not(.active) {
  background: var(--bg-tertiary);
  transform: translateY(-1px);
}

.tab-nav-btn.disabled {
  opacity: 0.5;
  cursor: not-allowed;
  pointer-events: none;
}

.tab-nav-btn.disabled .tab-icon {
  background: var(--bg-secondary);
  color: var(--text-disabled);
}

.tab-icon {
  font-size: 1.5rem;
  margin-right: var(--spacing-sm);
  transition: transform var(--transition-normal);
}

.tab-nav-btn.active .tab-icon {
  transform: scale(1.1);
}

.tab-content {
  text-align: left;
}

.tab-title {
  font-weight: var(--font-weight-semibold);
  font-size: 1rem;
  line-height: 1.2;
}

.tab-description {
  font-size: 0.875rem;
  opacity: 0.8;
  margin-top: 2px;
}

/* =========== TAB CONTENT =========== */
.tab-content-container {
  max-width: 1200px;
  margin: 0 auto;
}

.tab-pane {
  display: none;
  animation: fadeInUp 0.5s ease-out;
}

.tab-pane.active {
  display: block;
}

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

/* =========== CARDS =========== */
.connection-card,
.send-message-card,
.progress-card,
.analytics-card {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: var(--radius-2xl);
  box-shadow: var(--card-shadow);
  overflow: visible;
  margin-bottom: var(--spacing-xl);
  backdrop-filter: blur(10px);
  position: relative;
}

.card-header {
  padding: var(--spacing-xl);
  border-bottom: 1px solid var(--border-primary);
  display: flex;
  align-items: center;
  background: var(--bg-elevated);
}

.card-icon {
  width: 50px;
  height: 50px;
  background: linear-gradient(135deg, var(--primary-500), var(--primary-600));
  border-radius: var(--radius-xl);
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-size: 1.5rem;
  margin-right: var(--spacing-md);
  box-shadow: var(--shadow-md);
}

.card-title-section {
  flex: 1;
}

.card-title {
  font-size: 1.5rem;
  font-weight: var(--font-weight-bold);
  color: var(--text-primary);
  margin-bottom: var(--spacing-xs);
}

.card-subtitle {
  color: var(--text-secondary);
  font-size: 0.875rem;
}

.card-body {
  padding: var(--spacing-xl);
  position: relative;
}

/* =========== QR SECTION =========== */
.qr-section {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: var(--spacing-2xl);
  align-items: center;
}

.qr-instructions {
  padding: var(--spacing-lg);
}

.instruction-steps {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
}

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

.step-number {
  width: 32px;
  height: 32px;
  background: linear-gradient(135deg, var(--primary-500), var(--primary-600));
  color: white;
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: var(--font-weight-bold);
  font-size: 0.875rem;
  flex-shrink: 0;
}

.step-text {
  font-weight: var(--font-weight-medium);
  color: var(--text-secondary);
}

.qr-code-container {
  text-align: center;
}

.qr-wrapper {
  position: relative;
  display: inline-block;
  margin-bottom: var(--spacing-lg);
}

.qr-image {
  width: 280px;
  height: 280px;
  border-radius: var(--radius-xl);
  border: 1px solid var(--border-secondary);
  box-shadow: var(--shadow-xl);
  background: white;
  padding: var(--spacing-md);
}

.qr-overlay {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  border-radius: var(--radius-xl);
  overflow: hidden;
  pointer-events: none;
}

.qr-scanning-line {
  position: absolute;
  top: 0;
  left: 10%;
  right: 10%;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--primary-500), transparent);
  animation: scan 2s ease-in-out infinite;
}

@keyframes scan {
  0%, 100% { transform: translateY(0); opacity: 0; }
  50% { transform: translateY(260px); opacity: 1; }
}

.qr-actions {
  display: flex;
  justify-content: center;
  gap: var(--spacing-sm);
  flex-wrap: wrap;
}

.btn-refresh {
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
  padding: var(--spacing-sm) var(--spacing-md);
  background: var(--bg-tertiary);
  border: 1px solid var(--border-secondary);
  border-radius: var(--radius-lg);
  color: var(--text-secondary);
  text-decoration: none;
  font-weight: var(--font-weight-medium);
  transition: all var(--transition-normal);
  cursor: pointer;
}

.btn-refresh:hover {
  background: var(--bg-elevated);
  color: var(--primary-500);
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

.btn-refresh.btn-danger {
  background: rgba(239, 68, 68, 0.1);
  border-color: rgba(239, 68, 68, 0.3);
  color: var(--error-500);
}

.btn-refresh.btn-danger:hover {
  background: rgba(239, 68, 68, 0.2);
  border-color: var(--error-500);
  color: var(--error-500);
}

.btn-refresh:disabled {
  opacity: 0.6;
  cursor: not-allowed;
  transform: none;
}

/* =========== AUTHENTICATED SECTION =========== */
.authenticated-section {
  text-align: center;
  padding: var(--spacing-2xl);
}

.success-animation {
  margin-bottom: var(--spacing-xl);
}

.success-checkmark {
  font-size: 4rem;
  color: var(--success-500);
  animation: bounce 0.6s ease-out;
}

@keyframes bounce {
  0%, 20%, 50%, 80%, 100% { transform: translateY(0); }
  40% { transform: translateY(-20px); }
  60% { transform: translateY(-10px); }
}

.connection-info {
  margin-bottom: var(--spacing-xl);
}

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

.connection-description {
  color: var(--text-secondary);
  margin-bottom: var(--spacing-lg);
}

/* Mejor contraste para textos de conexión en modo claro */
[data-theme="light"] .connection-title {
  color: #0f172a;
  font-weight: 700;
}

[data-theme="light"] .connection-description {
  color: #1e293b;
  font-weight: 500;
}

.user-info-card {
  background: var(--bg-tertiary);
  border: 1px solid var(--border-primary);
  border-radius: var(--radius-xl);
  padding: var(--spacing-lg);
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  max-width: 400px;
  margin: 0 auto var(--spacing-lg);
}

/* Mejor contraste para tarjeta de usuario en modo claro */
[data-theme="light"] .user-info-card {
  background: #ffffff;
  border: 1px solid #e2e8f0;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
}

.user-avatar {
  width: 60px;
  height: 60px;
  background: linear-gradient(135deg, var(--primary-500), var(--primary-600));
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-size: 2rem;
  flex-shrink: 0;
}

.user-details {
  flex: 1;
  text-align: left;
}

.user-name,
.user-phone {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--spacing-xs);
}

.label {
  font-weight: var(--font-weight-medium);
  color: var(--text-tertiary);
  font-size: 0.875rem;
}

.value {
  font-weight: var(--font-weight-semibold);
  color: var(--text-primary);
}

/* Mejor contraste para etiquetas y valores en modo claro */
[data-theme="light"] .label {
  color: #64748b;
  font-weight: 500;
}

[data-theme="light"] .value {
  color: #0f172a;
  font-weight: 600;
}

.btn-primary-action {
  background: linear-gradient(135deg, var(--primary-500), var(--primary-600));
  color: white;
  border: none;
  padding: var(--spacing-md) var(--spacing-xl);
  border-radius: var(--radius-lg);
  font-weight: var(--font-weight-semibold);
  font-size: 1rem;
  cursor: pointer;
  transition: all var(--transition-normal);
  display: inline-flex;
  align-items: center;
  text-decoration: none;
  box-shadow: var(--shadow-lg);
}

.btn-primary-action:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-xl);
  filter: brightness(110%);
}

/* =========== RESPONSIVE DESIGN =========== */
@media (max-width: 768px) {
  .qr-section {
    grid-template-columns: 1fr;
    text-align: center;
  }
  
  .qr-image {
    width: 240px;
    height: 240px;
  }
  
  .tab-nav-container {
    flex-direction: column;
    max-width: 300px;
  }
  
  .tab-nav-btn {
    min-width: auto;
    justify-content: center;
  }
  
  .hero-stats {
    gap: var(--spacing-md);
  }
  
  .card-header {
    padding: var(--spacing-lg);
  }
  
  .card-body {
    padding: var(--spacing-lg);
  }
}

/* =========== FORM COMPONENTS =========== */
.message-form {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-2xl);
}

.form-section {
  position: relative;
}

.section-header {
  display: flex;
  align-items: center;
  margin-bottom: var(--spacing-lg);
}

.section-icon {
  width: 40px;
  height: 40px;
  background: linear-gradient(135deg, var(--primary-500), var(--primary-600));
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-size: 1.25rem;
  margin-right: var(--spacing-md);
  box-shadow: var(--shadow-md);
}

.section-title h4 {
  font-size: 1.25rem;
  font-weight: var(--font-weight-bold);
  color: var(--text-primary);
  margin-bottom: var(--spacing-xs);
}

.section-title p {
  color: var(--text-secondary);
  font-size: 0.875rem;
  margin: 0;
}

/* Mejor contraste para títulos de sección en modo claro */
[data-theme="light"] .section-title h4 {
  color: #0f172a;
  font-weight: 700;
}

[data-theme="light"] .section-title p {
  color: #475569;
  font-weight: 400;
}

/* =========== FILE UPLOAD =========== */
.file-upload-area {
  position: relative;
}

.file-input {
  position: absolute;
  opacity: 0;
  width: 100%;
  height: 100%;
  cursor: pointer;
  z-index: 2;
}

.file-upload-label {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  padding: var(--spacing-xl);
  background: var(--bg-tertiary);
  border: 2px dashed var(--border-secondary);
  border-radius: var(--radius-xl);
  cursor: pointer;
  transition: all var(--transition-normal);
  position: relative;
  overflow: hidden;
}

.file-upload-label::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(135deg, var(--primary-500), var(--primary-600));
  opacity: 0;
  transition: opacity var(--transition-normal);
  z-index: -1;
}

.file-upload-label:hover {
  border-color: var(--primary-500);
  transform: translateY(-2px);
}

.file-upload-label:hover::before {
  opacity: 0.05;
}

.upload-icon {
  font-size: 2.5rem;
  color: var(--primary-500);
  transition: transform var(--transition-normal);
}

.file-upload-label:hover .upload-icon {
  transform: scale(1.1);
}

.upload-text {
  flex: 1;
}

.upload-title {
  font-weight: var(--font-weight-semibold);
  color: var(--text-primary);
  margin-bottom: var(--spacing-xs);
}

.upload-subtitle {
  font-size: 0.875rem;
  color: var(--text-secondary);
}

.file-info {
  margin-top: var(--spacing-md);
  padding: var(--spacing-md);
  background: var(--bg-elevated);
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-primary);
  display: none;
}

.file-info.show {
  display: block;
  animation: fadeInUp 0.3s ease-out;
}

.file-info-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--spacing-sm) 0;
  border-bottom: 1px solid var(--border-primary);
}

.file-info-item:last-child {
  border-bottom: none;
}

.file-name {
  font-weight: var(--font-weight-medium);
  color: var(--text-primary);
}

.file-size {
  font-size: 0.875rem;
  color: var(--text-secondary);
}

/* =========== MESSAGE TYPE SELECTION =========== */
.message-type-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--spacing-md);
}

.message-type-option input[type="radio"] {
  display: none;
}

.type-option-label {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  padding: var(--spacing-lg);
  background: var(--bg-tertiary);
  border: 2px solid var(--border-primary);
  border-radius: var(--radius-xl);
  cursor: pointer;
  transition: all var(--transition-normal);
  position: relative;
  overflow: hidden;
}

/* Mejor contraste en modo claro */
[data-theme="light"] .type-option-label {
  background: #ffffff;
  border: 2px solid #e2e8f0;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
}

[data-theme="light"] .type-option-label:hover {
  border-color: var(--primary-500);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.12);
}

.type-option-label::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(135deg, var(--primary-500), var(--primary-600));
  opacity: 0;
  transition: opacity var(--transition-normal);
  z-index: -1;
}

.message-type-option input[type="radio"]:checked + .type-option-label {
  border-color: var(--primary-500);
  color: white;
}

.message-type-option input[type="radio"]:checked + .type-option-label::before {
  opacity: 1;
}

/* Mejor contraste para elementos seleccionados en modo claro */
[data-theme="light"] .message-type-option input[type="radio"]:checked + .type-option-label {
  background: var(--primary-500);
  border-color: var(--primary-600);
  color: white;
  box-shadow: 0 4px 15px rgba(34, 197, 94, 0.3);
}

[data-theme="light"] .message-type-option input[type="radio"]:checked + .type-option-label .type-icon {
  color: white;
}

[data-theme="light"] .message-type-option input[type="radio"]:checked + .type-option-label .type-title,
[data-theme="light"] .message-type-option input[type="radio"]:checked + .type-option-label .type-description {
  color: white;
}

.type-option-label:hover {
  border-color: var(--primary-500);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.type-icon {
  font-size: 1.5rem;
  color: var(--primary-500);
  transition: all var(--transition-normal);
}

.message-type-option input[type="radio"]:checked + .type-option-label .type-icon {
  color: white;
  transform: scale(1.1);
}

.type-content {
  flex: 1;
}

.type-title {
  font-weight: var(--font-weight-semibold);
  color: var(--text-primary);
  margin-bottom: var(--spacing-xs);
}

.type-description {
  font-size: 0.875rem;
  color: var(--text-secondary);
}

/* Mejor contraste para contenido de tipos en modo claro */
[data-theme="light"] .type-title {
  color: #0f172a;
  font-weight: 600;
}

[data-theme="light"] .type-description {
  color: #475569;
  font-weight: 400;
}

.type-title {
  font-weight: var(--font-weight-semibold);
  margin-bottom: var(--spacing-xs);
}

.type-description {
  font-size: 0.875rem;
  opacity: 0.8;
}

/* =========== MEDIA UPLOAD SECTIONS =========== */
.media-upload-sections {
  position: relative;
}

.media-section {
  transition: all var(--transition-normal);
}

.media-section.d-none {
  display: none !important;
}

.media-upload {
  background: var(--bg-elevated);
  border: 1px solid var(--border-primary);
}

/* =========== MESSAGE COMPOSER =========== */
.message-composer {
  position: relative;
  z-index: 1;
}

.message-textarea {
  width: 100%;
  min-height: 120px;
  padding: var(--spacing-md);
  background: var(--input-bg);
  border: 1px solid var(--input-border);
  border-radius: var(--radius-xl);
  color: var(--text-primary);
  font-family: inherit;
  font-size: 1rem;
  line-height: 1.6;
  resize: vertical;
  transition: all var(--transition-normal);
}

.message-textarea::placeholder {
  color: var(--input-placeholder);
}

.message-textarea:focus {
  outline: none;
  border-color: var(--border-focus);
  background: var(--input-focus-bg);
  box-shadow: 0 0 0 3px rgba(37, 211, 102, 0.1);
}

.message-tools {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-top: var(--spacing-sm);
}

.character-counter {
  font-size: 0.875rem;
  color: var(--text-tertiary);
}

.message-actions {
  display: flex;
  gap: var(--spacing-sm);
}

.btn-emoji {
  width: 36px;
  height: 36px;
  background: var(--bg-tertiary);
  border: 1px solid var(--border-secondary);
  border-radius: var(--radius-lg);
  color: var(--text-secondary);
  cursor: pointer;
  transition: all var(--transition-normal);
  display: flex;
  align-items: center;
  justify-content: center;
}

.btn-emoji:hover {
  background: var(--primary-500);
  color: white;
  transform: scale(1.1);
}

/* =========== EMOJI PICKER =========== */
.emoji-picker {
  position: absolute;
  top: 100%;
  right: 0;
  width: 350px;
  max-height: 300px;
  background: var(--bg-primary);
  border: 1px solid var(--border-primary);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-2xl);
  z-index: 9999;
  margin-top: var(--spacing-sm);
  overflow: hidden;
}

/* Ajustar posición si se sale del viewport */
@media (max-width: 768px) {
  .emoji-picker {
    right: -10px;
    width: 320px;
  }
}

@media (max-width: 480px) {
  .emoji-picker {
    left: 50%;
    right: auto;
    transform: translateX(-50%);
    width: 300px;
  }
}

.emoji-picker-header {
  padding: var(--spacing-sm);
  border-bottom: 1px solid var(--border-secondary);
  background: var(--bg-secondary);
}

.emoji-categories {
  display: flex;
  gap: var(--spacing-xs);
  justify-content: space-between;
}

.emoji-category {
  width: 32px;
  height: 32px;
  background: transparent;
  border: none;
  border-radius: var(--radius-lg);
  font-size: 1.2rem;
  cursor: pointer;
  transition: all var(--transition-fast);
  display: flex;
  align-items: center;
  justify-content: center;
}

.emoji-category:hover {
  background: var(--bg-tertiary);
  transform: scale(1.1);
}

.emoji-category.active {
  background: var(--primary-500);
  color: white;
}

.emoji-picker-body {
  max-height: 220px;
  overflow-y: auto;
  padding: var(--spacing-sm);
}

.emoji-picker-body::-webkit-scrollbar {
  width: 6px;
}

.emoji-picker-body::-webkit-scrollbar-track {
  background: var(--bg-tertiary);
  border-radius: var(--radius-sm);
}

.emoji-picker-body::-webkit-scrollbar-thumb {
  background: var(--border-secondary);
  border-radius: var(--radius-sm);
}

.emoji-picker-body::-webkit-scrollbar-thumb:hover {
  background: var(--primary-500);
}

.emoji-grid {
  display: grid;
  grid-template-columns: repeat(8, 1fr);
  gap: var(--spacing-xs);
}

.emoji-item {
  width: 32px;
  height: 32px;
  background: transparent;
  border: none;
  border-radius: var(--radius-md);
  font-size: 1.3rem;
  cursor: pointer;
  transition: all var(--transition-fast);
  display: flex;
  align-items: center;
  justify-content: center;
}

.emoji-item:hover {
  background: var(--bg-tertiary);
  transform: scale(1.3);
}

/* =========== FORM ACTIONS =========== */
.form-actions {
  text-align: center;
  padding-top: var(--spacing-lg);
  border-top: 1px solid var(--border-primary);
}

.btn-send-message {
  background: linear-gradient(135deg, var(--primary-500), var(--primary-600));
  color: white;
  border: none;
  padding: var(--spacing-md) var(--spacing-2xl);
  border-radius: var(--radius-xl);
  font-weight: var(--font-weight-bold);
  font-size: 1.1rem;
  cursor: pointer;
  transition: all var(--transition-normal);
  position: relative;
  overflow: hidden;
  min-width: 200px;
  min-height: 56px;
  box-shadow: var(--shadow-lg);
}

.btn-send-message:hover:not(:disabled) {
  transform: translateY(-3px);
  box-shadow: var(--shadow-2xl);
  filter: brightness(110%);
}

.btn-send-message:disabled {
  opacity: 0.8;
  cursor: not-allowed;
  transform: none;
}

.btn-content {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-sm);
  transition: opacity var(--transition-normal);
}

.btn-loading {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-sm);
  opacity: 0;
  transition: opacity var(--transition-normal);
}

.btn-send-message.loading .btn-content {
  opacity: 0;
}

.btn-send-message.loading .btn-loading {
  opacity: 1;
}

.btn-spinner {
  width: 20px;
  height: 20px;
  border: 2px solid rgba(255, 255, 255, 0.3);
  border-top-color: white;
  border-radius: var(--radius-full);
  animation: spin 1s linear infinite;
}

/* =========== PROGRESS COMPONENTS =========== */
.progress-card {
  animation: slideInUp 0.5s ease-out;
}

@keyframes slideInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.overall-progress {
  background: var(--bg-tertiary);
  border-radius: var(--radius-xl);
  padding: var(--spacing-lg);
  margin-bottom: var(--spacing-xl);
}

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

.progress-title {
  font-weight: var(--font-weight-semibold);
  color: var(--text-primary);
}

.progress-percentage {
  font-weight: var(--font-weight-bold);
  color: var(--primary-500);
  font-size: 1.25rem;
}

.progress-bar-container {
  background: var(--bg-primary);
  border-radius: var(--radius-full);
  height: 12px;
  overflow: hidden;
  position: relative;
}

.progress-fill {
  background: linear-gradient(90deg, var(--primary-500), var(--primary-600));
  height: 100%;
  border-radius: var(--radius-full);
  transition: width 0.3s ease-out;
  position: relative;
  width: 0%;
}

.progress-fill::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.3), transparent);
  animation: shimmer 2s ease-in-out infinite;
}

/* Progress fill when actively sending - faster animation */
.progress-fill.active {
  transition: width 0.2s ease-out;
}

.progress-fill.active::after {
  animation: shimmer 1.5s ease-in-out infinite;
}

/* Progress fill success animation */
.progress-fill.success {
  background: linear-gradient(90deg, var(--success-500), var(--success-600));
  animation: successPulse 0.6s ease-in-out;
}

@keyframes successPulse {
  0% { transform: scale(1); }
  50% { transform: scale(1.05); box-shadow: 0 0 20px rgba(34, 197, 94, 0.5); }
  100% { transform: scale(1); }
}

@keyframes shimmer {
  0% { transform: translateX(-100%); }
  100% { transform: translateX(100%); }
}

/* =========== STATS GRID =========== */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: var(--spacing-md);
  margin-bottom: var(--spacing-xl);
}

.stat-card {
  background: var(--bg-tertiary);
  border: 1px solid var(--border-primary);
  border-radius: var(--radius-xl);
  padding: var(--spacing-lg);
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  transition: all var(--transition-normal);
  position: relative;
  overflow: hidden;
}

.stat-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(135deg, var(--primary-500), var(--primary-600));
  opacity: 0;
  transition: opacity var(--transition-normal);
  z-index: -1;
}

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

.stat-card:hover::before {
  opacity: 0.05;
}

.stat-total { border-left: 4px solid var(--info-500); }
.stat-sent { border-left: 4px solid var(--success-500); }
.stat-errors { border-left: 4px solid var(--error-500); }
.stat-speed { border-left: 4px solid var(--warning-500); }

.stat-icon {
  width: 48px;
  height: 48px;
  background: var(--bg-elevated);
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  flex-shrink: 0;
}

.stat-total .stat-icon { color: var(--info-500); }
.stat-sent .stat-icon { color: var(--success-500); }
.stat-errors .stat-icon { color: var(--error-500); }
.stat-speed .stat-icon { color: var(--warning-500); }

.stat-content {
  flex: 1;
}

.stat-number {
  font-size: 1.75rem;
  font-weight: var(--font-weight-bold);
  color: var(--text-primary);
  line-height: 1;
  margin-bottom: var(--spacing-xs);
}

.stat-label {
  font-size: 0.875rem;
  color: var(--text-secondary);
  font-weight: var(--font-weight-medium);
}

/* =========== STATUS TABLE =========== */
.status-table-container {
  background: var(--bg-tertiary);
  border-radius: var(--radius-xl);
  overflow: hidden;
  border: 1px solid var(--border-primary);
}

.table-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--spacing-lg);
  background: var(--bg-elevated);
  border-bottom: 1px solid var(--border-primary);
}

.table-header h4 {
  font-weight: var(--font-weight-bold);
  color: var(--text-primary);
  margin: 0;
}

.table-actions {
  display: flex;
  gap: var(--spacing-sm);
}

.btn-cancel {
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
  padding: var(--spacing-sm) var(--spacing-md);
  background: var(--bg-tertiary);
  border: 1px solid var(--error-500);
  border-radius: var(--radius-lg);
  color: var(--error-500);
  text-decoration: none;
  font-weight: var(--font-weight-medium);
  font-size: 0.875rem;
  transition: all var(--transition-normal);
  cursor: pointer;
}

.btn-cancel:hover {
  background: var(--error-500);
  color: white;
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

.btn-export {
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
  padding: var(--spacing-sm) var(--spacing-md);
  background: var(--bg-tertiary);
  border: 1px solid var(--border-secondary);
  border-radius: var(--radius-lg);
  color: var(--text-secondary);
  text-decoration: none;
  font-weight: var(--font-weight-medium);
  font-size: 0.875rem;
  transition: all var(--transition-normal);
  cursor: pointer;
}

.btn-export:hover {
  background: var(--primary-500);
  color: white;
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

.table-wrapper {
  max-height: 400px;
  overflow-y: auto;
  scrollbar-width: thin;
  scrollbar-color: var(--border-secondary) transparent;
}

.table-wrapper::-webkit-scrollbar {
  width: 6px;
}

.table-wrapper::-webkit-scrollbar-track {
  background: transparent;
}

.table-wrapper::-webkit-scrollbar-thumb {
  background: var(--border-secondary);
  border-radius: var(--radius-full);
}

.status-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.875rem;
}

.status-table th {
  background: var(--bg-elevated);
  color: var(--text-secondary);
  font-weight: var(--font-weight-semibold);
  padding: var(--spacing-md);
  text-align: left;
  border-bottom: 1px solid var(--border-primary);
  position: sticky;
  top: 0;
  z-index: 1;
}

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

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

.status-table tbody tr:hover {
  background: var(--bg-elevated);
}

.status-row-success {
  background: rgba(34, 197, 94, 0.05);
}

.status-row-error {
  background: rgba(239, 68, 68, 0.05);
}

.status-badge {
  display: inline-flex;
  align-items: center;
  padding: var(--spacing-xs) var(--spacing-sm);
  border-radius: var(--radius-full);
  font-size: 0.75rem;
  font-weight: var(--font-weight-semibold);
  text-transform: uppercase;
  letter-spacing: 0.025em;
}

.badge-queued {
  background: var(--bg-tertiary);
  color: var(--text-tertiary);
  border: 1px solid var(--border-secondary);
}

.badge-sending {
  background: rgba(245, 158, 11, 0.1);
  color: var(--warning-500);
  border: 1px solid rgba(245, 158, 11, 0.3);
}

.badge-sent {
  background: rgba(34, 197, 94, 0.1);
  color: var(--success-500);
  border: 1px solid rgba(34, 197, 94, 0.3);
}

.badge-error {
  background: rgba(239, 68, 68, 0.1);
  color: var(--error-500);
  border: 1px solid rgba(239, 68, 68, 0.3);
}

/* =========== ANALYTICS SECTION =========== */
.analytics-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
  gap: var(--spacing-xl);
}

.analytics-section {
  background: var(--bg-tertiary);
  border-radius: var(--radius-xl);
  padding: var(--spacing-xl);
  border: 1px solid var(--border-primary);
}

.analytics-title {
  font-weight: var(--font-weight-bold);
  color: var(--text-primary);
  margin-bottom: var(--spacing-lg);
  font-size: 1.25rem;
}

.analytics-stats {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-lg);
}

.analytics-stat {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--spacing-md);
  background: var(--bg-elevated);
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-primary);
}

.stat-value {
  font-size: 1.5rem;
  font-weight: var(--font-weight-bold);
  color: var(--text-primary);
}

.stat-change {
  font-size: 0.875rem;
  font-weight: var(--font-weight-semibold);
  padding: var(--spacing-xs) var(--spacing-sm);
  border-radius: var(--radius-full);
}

.stat-change.positive {
  background: rgba(34, 197, 94, 0.1);
  color: var(--success-500);
}

.stat-change.negative {
  background: rgba(239, 68, 68, 0.1);
  color: var(--error-500);
}

.chart-placeholder {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  height: 300px;
  background: var(--bg-elevated);
  border-radius: var(--radius-lg);
  border: 2px dashed var(--border-secondary);
  color: var(--text-tertiary);
  text-align: center;
}

.chart-placeholder i {
  font-size: 3rem;
  margin-bottom: var(--spacing-md);
  color: var(--primary-500);
}

/* =========== LOADING OVERLAY =========== */
.loading-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: var(--bg-overlay);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: var(--z-modal);
  backdrop-filter: blur(8px);
}

.loading-overlay .loading-content {
  background: var(--bg-elevated);
  border-radius: var(--radius-xl);
  padding: var(--spacing-2xl);
  text-align: center;
  border: 1px solid var(--border-primary);
  box-shadow: var(--shadow-2xl);
}

.loading-overlay .loading-text {
  font-size: 1.125rem;
  color: var(--text-primary);
  margin-top: var(--spacing-md);
}

/* =========== UTILITY CLASSES =========== */
.d-none {
  display: none !important;
}

.text-center {
  text-align: center;
}

.text-left {
  text-align: left;
}

.text-right {
  text-align: right;
}

/* =========== RESPONSIVE BREAKPOINTS =========== */
@media (max-width: 1024px) {
  .analytics-grid {
    grid-template-columns: 1fr;
  }
  
  .stats-grid {
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  }
}

@media (max-width: 768px) {
  .main-content {
    padding-top: 80px;
  }
  
  .hero-section {
    padding: var(--spacing-2xl) 0;
  }
  
  .card-header {
    flex-direction: column;
    text-align: center;
    gap: var(--spacing-md);
  }
  
  .section-header {
    flex-direction: column;
    text-align: center;
    gap: var(--spacing-md);
  }
  
  .message-type-grid {
    grid-template-columns: 1fr;
  }
  
  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .table-header {
    flex-direction: column;
    gap: var(--spacing-md);
    text-align: center;
  }
}

@media (max-width: 480px) {
  .hero-stats {
    flex-direction: column;
    gap: var(--spacing-md);
  }
  
  .tab-nav-container {
    flex-direction: column;
    width: 100%;
    max-width: none;
  }
  
  .stats-grid {
    grid-template-columns: 1fr;
  }
  
  .card-body,
  .card-header {
    padding: var(--spacing-md);
  }
  
  .section-header {
    align-items: center;
  }
}

/* =========== FOOTER =========== */
.footer {
  background: linear-gradient(135deg, var(--bg-secondary), var(--bg-tertiary));
  border-top: 1px solid var(--border-primary);
  margin-top: var(--spacing-3xl);
  padding: var(--spacing-3xl) 0 var(--spacing-xl);
}

.footer-content {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: var(--spacing-2xl);
  margin-bottom: var(--spacing-2xl);
}

.footer-section {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
}

.company-logo {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  margin-bottom: var(--spacing-md);
}

.company-logo .brand-icon {
  width: 32px;
  height: 32px;
  background: var(--primary-500);
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-size: 1.2rem;
}

.company-logo .brand-text {
  font-size: 1.25rem;
  font-weight: var(--font-weight-bold);
  color: var(--text-primary);
}

.company-description {
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: var(--spacing-md);
}

.company-website {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  color: var(--primary-500);
  font-weight: var(--font-weight-medium);
}

.company-website a {
  color: var(--primary-500);
  text-decoration: none;
  transition: color var(--transition-normal);
}

.company-website a:hover {
  color: var(--primary-600);
  text-decoration: underline;
}

.footer-title {
  font-size: 1.1rem;
  font-weight: var(--font-weight-semibold);
  color: var(--text-primary);
  margin-bottom: var(--spacing-md);
}

.contact-item {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  color: var(--text-secondary);
}

.contact-item i {
  width: 20px;
  color: var(--primary-500);
}

.contact-item a {
  color: var(--text-secondary);
  text-decoration: none;
  transition: color var(--transition-normal);
}

.contact-item a:hover {
  color: var(--primary-500);
}

.social-links {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
}

.social-link {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-sm) var(--spacing-md);
  border-radius: var(--radius-lg);
  color: var(--text-secondary);
  text-decoration: none;
  transition: all var(--transition-normal);
  border: 1px solid transparent;
}

.social-link:hover {
  background: var(--bg-tertiary);
  border-color: var(--border-secondary);
  transform: translateY(-2px);
}

.social-link.instagram:hover {
  background: linear-gradient(45deg, #f09433, #e6683c, #dc2743, #cc2366, #bc1888);
  color: white;
  border-color: transparent;
}

.social-link.facebook:hover {
  background: #1877f2;
  color: white;
  border-color: transparent;
}

.social-link i {
  font-size: 1.2rem;
  width: 20px;
}

.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: var(--spacing-xl);
  border-top: 1px solid var(--border-secondary);
  flex-wrap: wrap;
  gap: var(--spacing-md);
}

.footer-copyright,
.footer-tech {
  color: var(--text-tertiary);
  font-size: 0.9rem;
}

.footer-tech {
  text-align: right;
}

/* Footer responsive */
@media (max-width: 768px) {
  .footer-content {
    grid-template-columns: 1fr;
    gap: var(--spacing-xl);
    text-align: center;
  }
  
  .footer-bottom {
    flex-direction: column;
    text-align: center;
    gap: var(--spacing-sm);
  }
  
  .footer-tech {
    text-align: center;
  }
  
  .social-links {
    align-items: center;
  }
}

@media (max-width: 480px) {
  .footer {
    padding: var(--spacing-2xl) 0 var(--spacing-lg);
  }
  
  .company-logo {
    justify-content: center;
  }
}

/* =========== VARIABLES SYSTEM =========== */

/* Message Textarea with Highlighting */
.message-textarea-container {
  position: relative;
  width: 100%;
}

.message-highlight {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  padding: var(--spacing-lg);
  font-family: inherit;
  font-size: inherit;
  line-height: inherit;
  white-space: pre-wrap;
  word-wrap: break-word;
  overflow: hidden;
  pointer-events: none;
  color: transparent;
  background: transparent;
  border: 1px solid transparent;
  border-radius: var(--radius-lg);
  z-index: 1;
}

.message-textarea {
  position: relative;
  z-index: 2;
  background: transparent;
}

/* Variable highlighting */
.variable-highlight {
  background: linear-gradient(135deg, rgba(37, 211, 102, 0.2), rgba(37, 211, 102, 0.1));
  color: var(--primary-500);
  font-weight: var(--font-weight-semibold);
  padding: 2px 4px;
  border-radius: 4px;
  border: 1px solid rgba(37, 211, 102, 0.3);
  box-shadow: 0 1px 2px rgba(37, 211, 102, 0.1);
}

/* Variable animation */
@keyframes variableGlow {
  0% {
    box-shadow: 0 1px 2px rgba(37, 211, 102, 0.1);
  }
  50% {
    box-shadow: 0 2px 8px rgba(37, 211, 102, 0.3);
  }
  100% {
    box-shadow: 0 1px 2px rgba(37, 211, 102, 0.1);
  }
}

.variable-highlight.new-variable {
  animation: variableGlow 1s ease-in-out;
}

/* CSV Variables Info */
.csv-variables-info {
  background: linear-gradient(135deg, rgba(59, 130, 246, 0.05), rgba(59, 130, 246, 0.02));
  border: 1px solid rgba(59, 130, 246, 0.2);
  border-radius: var(--radius-lg);
  padding: var(--spacing-lg);
  margin-top: var(--spacing-md);
}

.csv-variables-info .info-header {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  margin-bottom: var(--spacing-md);
  color: var(--info-500);
  font-weight: var(--font-weight-semibold);
}

.csv-variables-info .info-content p {
  color: var(--text-secondary);
  margin-bottom: var(--spacing-sm);
  font-size: 0.9rem;
}

.csv-examples {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
  margin-bottom: var(--spacing-md);
}

.csv-examples .example {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  font-size: 0.85rem;
}

.csv-examples .example strong {
  color: var(--text-primary);
  min-width: 140px;
}

.csv-examples .example code {
  background: var(--bg-tertiary);
  color: var(--primary-500);
  padding: 2px 6px;
  border-radius: var(--radius-sm);
  font-family: 'Monaco', 'Menlo', monospace;
  font-size: 0.8rem;
}

.variables-note {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  color: var(--text-tertiary);
  font-size: 0.85rem;
  margin-bottom: 0;
}

.variables-note code {
  background: var(--bg-tertiary);
  color: var(--warning-500);
  padding: 1px 4px;
  border-radius: var(--radius-sm);
  font-family: 'Monaco', 'Menlo', monospace;
  font-size: 0.8rem;
}

/* Message Tools Variables Button */
.btn-variables {
  background: none;
  border: none;
  color: var(--text-tertiary);
  font-size: 1.1rem;
  padding: var(--spacing-sm);
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all var(--transition-fast);
  display: flex;
  align-items: center;
  justify-content: center;
}

.btn-variables:hover {
  background: var(--bg-tertiary);
  color: var(--primary-500);
}

.btn-variables:focus {
  outline: none;
  box-shadow: 0 0 0 2px var(--primary-500);
}

/* Variables Helper */
.variables-helper {
  background: var(--bg-elevated);
  border: 1px solid var(--border-secondary);
  border-radius: var(--radius-lg);
  padding: var(--spacing-lg);
  margin-top: var(--spacing-md);
  box-shadow: var(--shadow-lg);
}

.variables-helper .variables-header {
  color: var(--text-primary);
  font-weight: var(--font-weight-semibold);
  margin-bottom: var(--spacing-md);
  font-size: 0.9rem;
}

.variables-list {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
  margin-bottom: var(--spacing-md);
}

.variable-btn {
  background: var(--bg-tertiary);
  border: 1px solid var(--border-primary);
  border-radius: var(--radius-md);
  padding: var(--spacing-md);
  cursor: pointer;
  transition: all var(--transition-fast);
  display: flex;
  align-items: center;
  justify-content: space-between;
  text-align: left;
}

.variable-btn:hover {
  background: var(--bg-secondary);
  border-color: var(--primary-500);
  transform: translateY(-1px);
}

.variable-btn:focus {
  outline: none;
  box-shadow: 0 0 0 2px var(--primary-500);
}

.variable-btn code {
  background: rgba(37, 211, 102, 0.1);
  color: var(--primary-500);
  padding: 4px 8px;
  border-radius: var(--radius-sm);
  font-family: 'Monaco', 'Menlo', monospace;
  font-size: 0.85rem;
  font-weight: var(--font-weight-medium);
}

.variable-btn span {
  color: var(--text-secondary);
  font-size: 0.85rem;
}

.variables-footer {
  padding-top: var(--spacing-md);
  border-top: 1px solid var(--border-primary);
}

.variables-footer small {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  font-size: 0.8rem;
}

/* Responsive Variables */
@media (max-width: 768px) {
  .csv-examples {
    gap: var(--spacing-xs);
  }
  
  .csv-examples .example {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--spacing-xs);
  }
  
  .csv-examples .example strong {
    min-width: auto;
  }
  
  .variables-list {
    gap: var(--spacing-xs);
  }
  
  .variable-btn {
    padding: var(--spacing-sm);
    flex-direction: column;
    align-items: flex-start;
    gap: var(--spacing-xs);
  }
}