/* SmartSave - Modern Student Budgeting App */
/* Color Palette:
   Primary: #4F46E5 (Indigo — Trust, Focus)
   Accent: #22C55E (Lime Green — Growth, Positivity)
   Background: #F9FAFB (Off White — Clean, Minimal)
   Text: #111827 (Rich Black — Legibility)
   Alert/Action: #F59E0B (Amber — Attention without stress)
*/

/* CSS Custom Properties (Variables) */
:root {
  /* Colors */
  --primary-color: #4F46E5;
  --primary-light: #6366F1;
  --primary-dark: #3730A3;
  --accent-color: #22C55E;
  --accent-light: #34D399;
  --accent-dark: #16A34A;
  --alert-color: #F59E0B;
  --alert-light: #FBBF24;
  --alert-dark: #D97706;
  --background-color: #F9FAFB;
  --surface-color: #FFFFFF;
  --text-primary: #111827;
  --text-secondary: #6B7280;
  --text-muted: #9CA3AF;
  --border-color: #E5E7EB;
  --border-light: #F3F4F6;
  --error-color: #EF4444;
  --success-color: #10B981;
  
  /* Dark mode colors */
  --dark-background: #0F172A;
  --dark-surface: #1E293B;
  --dark-surface-light: #334155;
  --dark-text-primary: #F1F5F9;
  --dark-text-secondary: #CBD5E1;
  --dark-border: #475569;
  
  /* Typography */
  --font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, 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;
  
  /* 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;
  
  /* Border radius */
  --radius-sm: 0.375rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;
  --radius-full: 9999px;
  
  /* Shadows */
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px 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);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
  
  /* Transitions */
  --transition-fast: 0.15s ease-in-out;
  --transition-normal: 0.3s ease-in-out;
  --transition-slow: 0.5s ease-in-out;
}

/* Dark mode variables */
[data-theme="dark"] {
  --background-color: var(--dark-background);
  --surface-color: var(--dark-surface);
  --text-primary: var(--dark-text-primary);
  --text-secondary: var(--dark-text-secondary);
  --border-color: var(--dark-border);
  --border-light: var(--dark-surface-light);
}

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

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

body {
  font-family: var(--font-family);
  font-size: var(--font-size-base);
  line-height: 1.6;
  color: var(--text-primary);
  background-color: var(--background-color);
  transition: background-color var(--transition-normal), color var(--transition-normal);
  overflow-x: hidden;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
  font-weight: 600;
  line-height: 1.3;
  margin-bottom: var(--spacing-md);
}

h1 {
  font-size: var(--font-size-3xl);
}

h2 {
  font-size: var(--font-size-2xl);
}

h3 {
  font-size: var(--font-size-xl);
}

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

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

/* Header and Navigation */
.header {
  background-color: var(--surface-color);
  border-bottom: 1px solid var(--border-color);
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  transition: all var(--transition-normal);
}

.nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--spacing-md) var(--spacing-lg);
  max-width: 1200px;
  margin: 0 auto;
}

.logo {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  font-size: var(--font-size-xl);
  font-weight: 700;
  color: var(--primary-color);
  text-decoration: none;
}

.logo i {
  font-size: 1.5rem;
}

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

.theme-toggle,
.menu-toggle {
  background: none;
  border: none;
  padding: var(--spacing-sm);
  border-radius: var(--radius-md);
  color: var(--text-secondary);
  cursor: pointer;
  transition: all var(--transition-fast);
  display: flex;
  align-items: center;
  justify-content: center;
}

.theme-toggle:hover,
.menu-toggle:hover {
  background-color: var(--border-light);
  color: var(--text-primary);
}

.nav-menu {
  display: flex;
  list-style: none;
  gap: var(--spacing-lg);
  margin: 0;
}

.nav-link {
  text-decoration: none;
  color: var(--text-secondary);
  font-weight: 500;
  padding: var(--spacing-sm) var(--spacing-md);
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
  position: relative;
}

.nav-link:hover,
.nav-link.active {
  color: var(--primary-color);
  background-color: var(--border-light);
}

/* Mobile Navigation */
@media (max-width: 768px) {
  .nav-menu {
    position: fixed;
    top: 100%;
    left: 0;
    right: 0;
    background-color: var(--surface-color);
    border-top: 1px solid var(--border-color);
    flex-direction: column;
    padding: var(--spacing-lg);
    transform: translateY(-100%);
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-normal);
  }

  .nav-menu.active {
    transform: translateY(0);
    opacity: 1;
    visibility: visible;
  }

  .menu-toggle {
    display: flex;
  }
}

@media (min-width: 769px) {
  .menu-toggle {
    display: none;
  }
}

/* Main Content */
.main-content {
  margin-top: 80px;
  min-height: calc(100vh - 80px);
}

/* Section Styles */
section {
  padding: var(--spacing-3xl) 0;
}

.section-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--spacing-2xl);
  flex-wrap: wrap;
  gap: var(--spacing-md);
}

.section-title {
  color: var(--text-primary);
  margin-bottom: 0;
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
}

/* Welcome Section */
.welcome-section {
  background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-light) 100%);
  color: white;
  text-align: center;
  padding: var(--spacing-3xl) 0;
}

.welcome-title {
  font-size: var(--font-size-4xl);
  margin-bottom: var(--spacing-md);
  color: white;
}

.welcome-subtitle {
  font-size: var(--font-size-lg);
  margin-bottom: var(--spacing-2xl);
  color: rgba(255, 255, 255, 0.9);
}

/* Stats Grid */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--spacing-lg);
  margin-top: var(--spacing-2xl);
}

.stat-card {
  background-color: var(--surface-color);
  padding: var(--spacing-xl);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  display: flex;
  align-items: center;
  gap: var(--spacing-lg);
  transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}

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

.stat-icon {
  width: 60px;
  height: 60px;
  border-radius: var(--radius-full);
  background-color: var(--primary-color);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--font-size-xl);
  color: white;
}

.stat-icon.expense {
  background-color: var(--alert-color);
}

.stat-icon.savings {
  background-color: var(--accent-color);
}

.stat-icon.remaining {
  background-color: var(--success-color);
}

.stat-value {
  font-size: var(--font-size-2xl);
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: var(--spacing-xs);
}

.stat-label {
  color: var(--text-secondary);
  font-size: var(--font-size-sm);
  margin-bottom: 0;
}

/* Budget Overview */
.budget-content {
  display: grid;
  grid-template-columns: 1fr 300px;
  gap: var(--spacing-2xl);
  align-items: start;
}

.budget-chart-container {
  background-color: var(--surface-color);
  padding: var(--spacing-xl);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
}

.budget-categories {
  background-color: var(--surface-color);
  padding: var(--spacing-xl);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
}

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

.category-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--spacing-md);
  border-radius: var(--radius-md);
  background-color: var(--border-light);
  transition: background-color var(--transition-fast);
}

.category-item:hover {
  background-color: var(--border-color);
}

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

.category-icon {
  font-size: var(--font-size-lg);
}

.category-name {
  font-weight: 500;
  color: var(--text-primary);
}

.category-amount {
  font-weight: 600;
  color: var(--primary-color);
}

/* Expense Tracking */
.expense-form-container {
  background-color: var(--surface-color);
  padding: var(--spacing-xl);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  margin-bottom: var(--spacing-xl);
}

.expense-form {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: var(--spacing-lg);
  align-items: end;
}

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

.form-group label {
  font-weight: 500;
  color: var(--text-primary);
  font-size: var(--font-size-sm);
}

.form-group input,
.form-group select {
  padding: var(--spacing-md);
  border: 2px solid var(--border-color);
  border-radius: var(--radius-md);
  font-size: var(--font-size-base);
  transition: border-color var(--transition-fast);
  background-color: var(--surface-color);
  color: var(--text-primary);
}

.form-group input:focus,
.form-group select:focus {
  outline: none;
  border-color: var(--primary-color);
  box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.1);
}

.form-actions {
  display: flex;
  gap: var(--spacing-sm);
  grid-column: 1 / -1;
  justify-content: flex-end;
  margin-top: var(--spacing-md);
}

/* Expense List */
.expense-list {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
}

.expense-item {
  background-color: var(--surface-color);
  padding: var(--spacing-lg);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  display: flex;
  align-items: center;
  justify-content: space-between;
  transition: box-shadow var(--transition-fast);
}

.expense-item:hover {
  box-shadow: var(--shadow-md);
}

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

.expense-category-icon {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-full);
  background-color: var(--border-light);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--font-size-lg);
}

.expense-info h4 {
  font-size: var(--font-size-base);
  color: var(--text-primary);
  margin-bottom: var(--spacing-xs);
}

.expense-meta {
  font-size: var(--font-size-sm);
  color: var(--text-secondary);
  margin-bottom: 0;
}

.expense-amount {
  font-size: var(--font-size-lg);
  font-weight: 600;
  color: var(--alert-color);
}

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

/* Savings Goals */
.goals-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--spacing-xl);
}

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

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

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

.goal-title {
  font-size: var(--font-size-lg);
  color: var(--text-primary);
  margin-bottom: 0;
}

.goal-target {
  font-size: var(--font-size-sm);
  color: var(--text-secondary);
}

.goal-badge {
  background-color: var(--success-color);
  color: white;
  padding: var(--spacing-xs) var(--spacing-sm);
  border-radius: var(--radius-full);
  font-size: var(--font-size-xs);
  font-weight: 600;
}

.empty-state {
  text-align: center;
  padding: var(--spacing-2xl);
  color: var(--text-secondary);
  font-style: italic;
}

.goal-progress {
  margin-bottom: var(--spacing-lg);
}

.progress-bar {
  width: 100%;
  height: 8px;
  background-color: var(--border-light);
  border-radius: var(--radius-full);
  overflow: hidden;
  margin-bottom: var(--spacing-sm);
}

.progress-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--accent-color), var(--accent-light));
  border-radius: var(--radius-full);
  transition: width var(--transition-normal);
}

.progress-text {
  display: flex;
  justify-content: space-between;
  font-size: var(--font-size-sm);
  color: var(--text-secondary);
}

/* AI Assistant Circles */
.section-subtitle {
  color: var(--text-secondary);
  font-size: var(--font-size-base);
  margin-bottom: 0;
  text-align: center;
}

.ai-assistants-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: var(--spacing-lg);
  margin-top: var(--spacing-2xl);
  justify-items: center;
  max-width: 1000px;
  margin-left: auto;
  margin-right: auto;
}

.ai-assistant-circle {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  cursor: pointer;
  transition: all var(--transition-normal);
  width: 100%;
  max-width: 180px;
}

.ai-assistant-circle:hover .assistant-circle {
  transform: translateY(-5px) scale(1.05);
  box-shadow: var(--shadow-xl);
}

.ai-assistant-circle:active .assistant-circle {
  transform: translateY(-3px) scale(1.02);
}

.assistant-circle {
  width: 140px;
  height: 140px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--primary-color), var(--primary-light));
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  transition: all var(--transition-normal);
  box-shadow: var(--shadow-lg);
  padding: var(--spacing-md);
  position: relative;
  margin: 0 auto var(--spacing-sm) auto;
}

.assistant-icon {
  font-size: 2rem;
  margin-bottom: var(--spacing-xs);
  filter: drop-shadow(0 2px 4px rgba(0, 0, 0, 0.1));
}

.assistant-image {
  width: 2rem;
  height: 2rem;
  object-fit: contain;
  filter: drop-shadow(0 2px 4px rgba(0, 0, 0, 0.1));
}

.chat-assistant-image {
  width: 24px;
  height: 24px;
}

.chat-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--spacing-lg);
  border-bottom: 1px solid var(--border-color);
  background: linear-gradient(135deg, var(--primary-color), var(--primary-light));
  color: white;
  border-radius: var(--radius-lg) var(--radius-lg) 0 0;
}

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

.chat-assistant-icon {
  width: 50px;
  height: 50px;
  border-radius: 50%;
  background-color: rgba(255, 255, 255, 0.2);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--font-size-xl);
}

.chat-header h3 {
  margin-bottom: var(--spacing-xs);
  color: white;
}

.chat-header p {
  font-size: var(--font-size-sm);
  color: rgba(255, 255, 255, 0.8);
  margin-bottom: 0;
}

.chat-close {
  background: none;
  border: none;
  padding: var(--spacing-sm);
  border-radius: var(--radius-md);
  color: white;
  cursor: pointer;
  transition: all var(--transition-fast);
  font-size: var(--font-size-lg);
}

.chat-close:hover {
  background-color: rgba(255, 255, 255, 0.2);
}

.chat-messages {
  flex: 1;
  padding: var(--spacing-lg);
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
}

.chat-message {
  max-width: 80%;
  padding: var(--spacing-md);
  border-radius: var(--radius-lg);
  position: relative;
}

.chat-message.user {
  align-self: flex-end;
  background-color: var(--primary-color);
  color: white;
  border-bottom-right-radius: var(--radius-sm);
}

.chat-message.assistant {
  align-self: flex-start;
  background-color: var(--border-light);
  color: var(--text-primary);
  border-bottom-left-radius: var(--radius-sm);
}

.chat-message-time {
  font-size: var(--font-size-xs);
  opacity: 0.7;
  margin-top: var(--spacing-xs);
}

.chat-input-container {
  padding: var(--spacing-lg);
  border-top: 1px solid var(--border-color);
}

.chat-input-wrapper {
  display: flex;
  gap: var(--spacing-sm);
  align-items: center;
}

.chat-input-wrapper input {
  flex: 1;
  padding: var(--spacing-md);
  border: 2px solid var(--border-color);
  border-radius: var(--radius-full);
  font-size: var(--font-size-base);
  background-color: var(--background-color);
  color: var(--text-primary);
  transition: border-color var(--transition-fast);
}

.chat-input-wrapper input:focus {
  outline: none;
  border-color: var(--primary-color);
}

.chat-input-wrapper button {
  width: 44px;
  height: 44px;
  border: none;
  border-radius: 50%;
  background-color: var(--primary-color);
  color: white;
  cursor: pointer;
  transition: all var(--transition-fast);
  display: flex;
  align-items: center;
  justify-content: center;
}

.chat-input-wrapper button:hover {
  background-color: var(--primary-dark);
  transform: scale(1.05);
}

.chat-input-wrapper button:disabled {
  background-color: var(--text-muted);
  cursor: not-allowed;
  transform: none;
}

.typing-indicator {
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
  color: var(--text-secondary);
  font-style: italic;
  padding: var(--spacing-sm) 0;
}

.typing-dots {
  display: flex;
  gap: 2px;
}

.typing-dot {
  width: 4px;
  height: 4px;
  border-radius: 50%;
  background-color: var(--text-secondary);
  animation: typing 1.4s infinite ease-in-out;
}

.typing-dot:nth-child(1) { animation-delay: -0.32s; }
.typing-dot:nth-child(2) { animation-delay: -0.16s; }

@keyframes typing {
  0%, 80%, 100% {
    transform: scale(0);
    opacity: 0.5;
  }
  40% {
    transform: scale(1);
    opacity: 1;
  }
}

/* Dark mode adjustments for links */
[data-theme="dark"] .ai-assistant-link .assistant-description {
  color: var(--dark-text-secondary);
}

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

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

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

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

.btn-accent:hover {
  background-color: var(--accent-dark);
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

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

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

.btn-small {
  padding: var(--spacing-sm) var(--spacing-md);
  font-size: var(--font-size-sm);
}

.btn-icon {
  padding: var(--spacing-sm);
  border-radius: var(--radius-full);
  width: 40px;
  height: 40px;
  justify-content: center;
}

/* Modals */
.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: rgba(0, 0, 0, 0.5);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 2000;
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-normal);
}

.modal-overlay.active {
  opacity: 1;
  visibility: visible;
}

.modal {
  background-color: var(--surface-color);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-xl);
  max-width: 500px;
  width: 90%;
  max-height: 90vh;
  overflow-y: auto;
  transform: scale(0.9);
  transition: transform var(--transition-normal);
}

.modal-overlay.active .modal {
  transform: scale(1);
}

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

.modal-header h3 {
  color: var(--text-primary);
  margin-bottom: 0;
}

.modal-close {
  background: none;
  border: none;
  padding: var(--spacing-sm);
  border-radius: var(--radius-md);
  color: var(--text-secondary);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.modal-close:hover {
  background-color: var(--border-light);
  color: var(--text-primary);
}

.modal-content {
  padding: var(--spacing-xl);
}

.modal-actions {
  display: flex;
  gap: var(--spacing-sm);
  justify-content: flex-end;
  margin-top: var(--spacing-lg);
}

/* Toast Notifications */
.toast-container {
  position: fixed;
  top: var(--spacing-xl);
  right: var(--spacing-xl);
  z-index: 3000;
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
}

.toast {
  background-color: var(--surface-color);
  color: var(--text-primary);
  padding: var(--spacing-lg);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  border-left: 4px solid var(--success-color);
  max-width: 350px;
  transform: translateX(100%);
  transition: transform var(--transition-normal);
  position: relative;
}

.toast.show {
  transform: translateX(0);
}

.toast.error {
  border-left-color: var(--error-color);
}

.toast.warning {
  border-left-color: var(--alert-color);
}

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

.toast-title {
  font-weight: 600;
  color: var(--text-primary);
}

.toast-close {
  background: none;
  border: none;
  color: var(--text-secondary);
  cursor: pointer;
  padding: var(--spacing-xs);
}

.toast-message {
  color: var(--text-secondary);
  font-size: var(--font-size-sm);
  margin-bottom: 0;
}

/* Footer */
.footer {
  background-color: var(--surface-color);
  border-top: 1px solid var(--border-color);
  padding: var(--spacing-2xl) 0;
  text-align: center;
}

.footer-brand {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-sm);
  font-size: var(--font-size-lg);
  font-weight: 600;
  color: var(--primary-color);
  margin-bottom: var(--spacing-md);
}

.footer-text {
  color: var(--text-secondary);
  font-size: var(--font-size-sm);
  margin-bottom: 0;
}

/* Responsive Design */
@media (max-width: 1024px) {
  .budget-content {
    grid-template-columns: 1fr;
  }
  
  .stats-grid {
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  }
  
  .ai-assistants-grid {
    grid-template-columns: repeat(5, 1fr);
    gap: var(--spacing-md);
    max-width: 900px;
  }
  
  .assistant-circle {
    width: 120px;
    height: 120px;
  }
  
  .assistant-icon {
    font-size: 1.8rem;
  }
  
  .assistant-image {
    width: 1.8rem;
    height: 1.8rem;
  }
  
  .assistant-name {
    font-size: var(--font-size-sm);
  }
}

@media (max-width: 768px) {
  .container {
    padding: 0 var(--spacing-sm);
  }
  
  section {
    padding: var(--spacing-xl) 0;
  }
  
  .welcome-title {
    font-size: var(--font-size-2xl);
  }
  
  .section-header {
    flex-direction: column;
    align-items: stretch;
  }
  
  .expense-form {
    grid-template-columns: 1fr;
  }
  
  .form-actions {
    grid-column: 1;
  }
  
  .stats-grid {
    grid-template-columns: 1fr;
  }
  
  .stat-card {
    padding: var(--spacing-lg);
  }
  
  .goals-grid {
    grid-template-columns: 1fr;
  }
  
  .toast-container {
    left: var(--spacing-sm);
    right: var(--spacing-sm);
  }
  
  .toast {
    max-width: none;
  }
  
  .ai-assistants-grid {
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-sm);
    max-width: 600px;
  }
  
  .assistant-circle {
    width: 100px;
    height: 100px;
    padding: var(--spacing-sm);
  }
  
  .assistant-icon {
    font-size: 1.5rem;
  }
  
  .assistant-image {
    width: 1.5rem;
    height: 1.5rem;
  }
  
  .assistant-name {
    font-size: var(--font-size-xs);
  }
  
  .assistant-description {
    font-size: 0.65rem;
    max-width: 120px;
  }
  
  .chat-modal {
    width: 95%;
    height: 85vh;
  }
  
  .chat-header {
    padding: var(--spacing-md);
  }
  
  .chat-assistant-icon {
    width: 40px;
    height: 40px;
  }
  
  .chat-assistant-image {
    width: 24px;
    height: 24px;
  }
  
  .chat-messages {
    padding: var(--spacing-md);
  }
  
  .chat-input-container {
    padding: var(--spacing-md);
  }
}

@media (max-width: 480px) {
  .nav-container {
    padding: var(--spacing-sm) var(--spacing-md);
  }
  
  .welcome-section {
    padding: var(--spacing-xl) 0;
  }
  
  .welcome-title {
    font-size: var(--font-size-xl);
  }
  
  .stat-icon {
    width: 50px;
    height: 50px;
    font-size: var(--font-size-lg);
  }
  
  .stat-value {
    font-size: var(--font-size-xl);
  }
}

/* Loading States */
.loading {
  position: relative;
  overflow: hidden;
}

.loading::after {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.6), transparent);
  animation: loading 1.5s infinite;
}

@keyframes loading {
  0% {
    left: -100%;
  }
  100% {
    left: 100%;
  }
}

/* Focus Styles for Accessibility */
*:focus {
  outline: 2px solid var(--primary-color);
  outline-offset: 2px;
}

button:focus,
input:focus,
select:focus {
  outline: none;
  box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.1);
}

/* Print Styles */
@media print {
  .header,
  .footer,
  .btn,
  .modal-overlay,
  .toast-container {
    display: none !important;
  }
  
  .main-content {
    margin-top: 0;
  }
  
  * {
    box-shadow: none !important;
  }
}

/* Specific colors for each AI assistant circle */
.ai-assistant-circle[data-category="subscription"] .assistant-circle {
  background: linear-gradient(135deg, var(--primary-color), var(--primary-light)); /* Dark blue to blue */
}

.ai-assistant-circle[data-category="personal-care"] .assistant-circle {
  background: linear-gradient(135deg, #8B5CF6, #A78BFA); /* Purple to light purple */
}

.ai-assistant-circle[data-category="entertainment"] .assistant-circle {
  background: linear-gradient(135deg, var(--accent-color), var(--accent-light)); /* Green to light green */
}

.ai-assistant-circle[data-category="food"] .assistant-circle {
  background: linear-gradient(135deg, var(--alert-color), var(--alert-light)); /* Orange to light orange */
}

.ai-assistant-circle[data-category="transport"] .assistant-circle {
  background: linear-gradient(135deg, #06B6D4, #67E8F9); /* Blue to light blue */
}

.ai-assistant-link {
  text-decoration: none;
  color: inherit;
  display: block;
}

.ai-assistant-link:hover,
.ai-assistant-link:focus,
.ai-assistant-link:active,
.ai-assistant-link:visited {
  text-decoration: none;
  color: inherit;
  outline: none;
}

.assistant-name {
  font-size: var(--font-size-sm);
  font-weight: 600;
  color: white;
  text-shadow: 0 1px 2px rgba(0, 0, 0, 0.3);
  margin-top: var(--spacing-xs);
}

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