/* ===== BUDGET TRACKER PRO STYLES ===== */

/* === BASE STYLES === */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: var(--font-family);
  line-height: var(--leading-normal);
  color: var(--text-primary);
  background: var(--bg-primary);
  overflow-x: hidden;
  transition: all var(--transition-base);
}

/* === THEME VARIABLES OVERRIDE === */
:root {
  --budget-income: var(--success-600);
  --budget-expense: var(--error-600);
  --budget-savings: var(--accent-600);
  --budget-warning: var(--warning-600);
  --budget-neutral: var(--neutral-600);
}

/* === LOADING SCREEN === */
.loading-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100vh;
  background: linear-gradient(135deg, var(--success-600), var(--primary-600));
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 10000;
  transition: opacity 0.5s ease, visibility 0.5s ease;
}

.loading-overlay.hidden {
  opacity: 0;
  visibility: hidden;
}

.loading-content {
  text-align: center;
  color: white;
}

.loading-spinner {
  width: 50px;
  height: 50px;
  border: 4px solid rgba(255, 255, 255, 0.3);
  border-top: 4px solid white;
  border-radius: 50%;
  animation: spin 1s linear infinite;
  margin: 0 auto var(--space-4);
}

@keyframes spin {
  0% { transform: rotate(0deg); }
  100% { transform: rotate(360deg); }
}

/* === THEME TOGGLE === */
.theme-toggle {
  position: fixed;
  top: var(--space-6);
  right: var(--space-6);
  width: 50px;
  height: 50px;
  border: none;
  border-radius: var(--border-radius-full);
  cursor: pointer;
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition-base);
}

.theme-toggle:hover {
  transform: scale(1.1);
}

.theme-icon {
  position: absolute;
  transition: all var(--transition-base);
}

[data-theme="light"] .dark-icon {
  opacity: 0;
  transform: rotate(180deg) scale(0);
}

[data-theme="dark"] .light-icon {
  opacity: 0;
  transform: rotate(-180deg) scale(0);
}

/* === BACK BUTTON === */
.back-button {
  position: fixed;
  top: var(--space-6);
  left: var(--space-6);
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-4);
  text-decoration: none;
  color: var(--text-primary);
  border-radius: var(--border-radius-lg);
  transition: all var(--transition-base);
  z-index: 1000;
  font-weight: var(--font-medium);
}

.back-button:hover {
  transform: translateX(-2px);
  color: var(--success-600);
}

/* === APP CONTAINER === */
.app-container {
  max-width: 1400px;
  margin: 0 auto;
  padding: var(--space-20) var(--space-6) var(--space-8);
  min-height: 100vh;
}

/* === APP HEADER === */
.app-header {
  margin-bottom: var(--space-8);
}

.header-content {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--space-8);
  flex-wrap: wrap;
  gap: var(--space-6);
}

.app-branding {
  display: flex;
  align-items: center;
  gap: var(--space-4);
}

.app-icon {
  width: 60px;
  height: 60px;
  background: var(--gradient-secondary);
  border-radius: var(--border-radius-xl);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--text-2xl);
  color: white;
  box-shadow: var(--shadow-lg);
}

.app-title h1 {
  font-size: var(--text-3xl);
  font-weight: var(--font-bold);
  margin-bottom: var(--space-1);
}

.app-subtitle {
  color: var(--text-secondary);
  font-size: var(--text-base);
}

/* === BALANCE OVERVIEW === */
.balance-overview {
  display: flex;
  align-items: center;
  gap: var(--space-6);
}

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

.balance-main h2 {
  font-size: var(--text-lg);
  color: var(--text-secondary);
  margin-bottom: var(--space-2);
}

.balance-amount {
  font-size: var(--text-4xl);
  font-weight: var(--font-bold);
  background: var(--gradient-primary);
  background-clip: text;
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  margin-bottom: var(--space-2);
}

.balance-trend {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--text-sm);
  color: var(--success-600);
}

.balance-trend.negative {
  color: var(--error-600);
}

/* === FINANCIAL SUMMARY === */
.financial-summary {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--space-6);
}

.summary-card {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  padding: var(--space-6);
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: var(--border-radius-xl);
  backdrop-filter: blur(10px);
  transition: all var(--transition-base);
  position: relative;
  overflow: hidden;
}

.summary-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: var(--gradient-primary);
  transform: scaleX(0);
  transition: transform var(--transition-base);
}

.summary-card:hover::before {
  transform: scaleX(1);
}

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

.summary-icon {
  width: 50px;
  height: 50px;
  border-radius: var(--border-radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-size: var(--text-xl);
  flex-shrink: 0;
}

.income-card .summary-icon {
  background: var(--gradient-secondary);
}

.expense-card .summary-icon {
  background: linear-gradient(135deg, var(--error-500), var(--error-600));
}

.savings-card .summary-icon {
  background: var(--gradient-accent);
}

.budget-card .summary-icon {
  background: var(--gradient-primary);
}

.summary-content h3 {
  font-size: var(--text-base);
  color: var(--text-secondary);
  margin-bottom: var(--space-2);
}

.summary-amount {
  font-size: var(--text-2xl);
  font-weight: var(--font-bold);
  margin-bottom: var(--space-1);
}

.summary-subtitle {
  font-size: var(--text-sm);
  color: var(--text-secondary);
}

/* Budget Progress */
.budget-progress {
  width: 100%;
}

.budget-bar {
  width: 100%;
  height: 8px;
  background: var(--bg-tertiary);
  border-radius: var(--border-radius-full);
  overflow: hidden;
  margin-bottom: var(--space-2);
}

.budget-fill {
  height: 100%;
  background: var(--gradient-primary);
  border-radius: var(--border-radius-full);
  transition: width 0.5s ease;
  width: 0%;
}

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

/* === QUICK ACTIONS === */
.quick-actions {
  display: flex;
  gap: var(--space-4);
  margin-bottom: var(--space-8);
  flex-wrap: wrap;
  justify-content: center;
}

.quick-action-btn {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-4) var(--space-6);
  border: none;
  border-radius: var(--border-radius-xl);
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  color: var(--text-primary);
  cursor: pointer;
  transition: all var(--transition-base);
  backdrop-filter: blur(10px);
  min-width: 120px;
}

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

.quick-action-btn i {
  font-size: var(--text-xl);
}

.income-btn:hover {
  background: var(--success-50);
  border-color: var(--success-300);
  color: var(--success-700);
}

.expense-btn:hover {
  background: var(--error-50);
  border-color: var(--error-300);
  color: var(--error-700);
}

.budget-btn:hover {
  background: var(--primary-50);
  border-color: var(--primary-300);
  color: var(--primary-700);
}

.export-btn:hover {
  background: var(--accent-50);
  border-color: var(--accent-300);
  color: var(--accent-700);
}

/* === TRANSACTION SECTION === */
.transaction-section {
  margin-bottom: var(--space-8);
}

.transaction-form {
  overflow: hidden;
}

.form-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-4) var(--space-6);
  background: var(--bg-secondary);
  border-bottom: 1px solid var(--border-color);
  cursor: pointer;
  transition: all var(--transition-base);
}

.form-header:hover {
  background: var(--bg-tertiary);
}

.form-header h3 {
  font-size: var(--text-lg);
  font-weight: var(--font-semibold);
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.form-toggle {
  background: none;
  border: none;
  color: var(--text-secondary);
  font-size: var(--text-lg);
  cursor: pointer;
  transition: all var(--transition-base);
}

.form-toggle:hover {
  color: var(--text-primary);
  transform: scale(1.1);
}

.form-content {
  padding: var(--space-6);
  max-height: 600px;
  overflow: hidden;
  transition: all var(--transition-base);
}

.form-content.collapsed {
  max-height: 0;
  padding: 0 var(--space-6);
}

.form-row {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: var(--space-4);
  margin-bottom: var(--space-4);
}

.input-group {
  position: relative;
  display: flex;
  align-items: center;
}

.input-group.full-width {
  grid-column: 1 / -1;
}

.input-icon {
  position: absolute;
  left: var(--space-4);
  color: var(--text-secondary);
  z-index: 2;
}

.form-input,
.form-select,
.form-textarea {
  width: 100%;
  padding: var(--space-3) var(--space-4);
  padding-left: var(--space-12);
  border: 2px solid var(--border-color);
  border-radius: var(--border-radius-lg);
  background: var(--bg-primary);
  color: var(--text-primary);
  font-size: var(--text-base);
  transition: all var(--transition-base);
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
  outline: none;
  border-color: var(--success-500);
  box-shadow: 0 0 0 3px var(--success-100);
}

.form-textarea {
  resize: vertical;
  min-height: 60px;
}

/* Transaction Type Selection */
.transaction-type-group {
  display: flex;
  gap: var(--space-2);
  background: var(--bg-secondary);
  border-radius: var(--border-radius-lg);
  padding: var(--space-1);
}

.type-option {
  flex: 1;
  cursor: pointer;
}

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

.type-label {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-4);
  border-radius: var(--border-radius-md);
  background: transparent;
  color: var(--text-secondary);
  transition: all var(--transition-base);
  font-weight: var(--font-medium);
}

.type-option input[type="radio"]:checked + .type-label {
  background: var(--bg-primary);
  color: var(--text-primary);
  box-shadow: var(--shadow-sm);
}

.income-option input[type="radio"]:checked + .type-label {
  color: var(--success-600);
}

.expense-option input[type="radio"]:checked + .type-label {
  color: var(--error-600);
}

.form-actions {
  display: flex;
  gap: var(--space-3);
  flex-wrap: wrap;
}

/* === ANALYTICS SECTION === */
.analytics-section {
  margin-bottom: var(--space-8);
}

.section-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--space-6);
  flex-wrap: wrap;
  gap: var(--space-4);
}

.section-header h2 {
  font-size: var(--text-2xl);
  font-weight: var(--font-bold);
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.time-period-selector {
  display: flex;
  gap: var(--space-2);
  background: var(--bg-secondary);
  border-radius: var(--border-radius-lg);
  padding: var(--space-1);
}

.period-btn {
  padding: var(--space-2) var(--space-4);
  border: none;
  border-radius: var(--border-radius-md);
  background: transparent;
  color: var(--text-secondary);
  cursor: pointer;
  transition: all var(--transition-base);
  font-weight: var(--font-medium);
}

.period-btn:hover,
.period-btn.active {
  background: var(--bg-primary);
  color: var(--text-primary);
  box-shadow: var(--shadow-sm);
}

/* === CHARTS GRID === */
.charts-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
  gap: var(--space-6);
}

.chart-card {
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: var(--border-radius-xl);
  backdrop-filter: blur(10px);
  overflow: hidden;
  transition: all var(--transition-base);
}

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

.chart-card.trend-chart {
  grid-column: 1 / -1;
}

.chart-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-4) var(--space-6);
  border-bottom: 1px solid var(--border-color);
}

.chart-header h3 {
  font-size: var(--text-lg);
  font-weight: var(--font-semibold);
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.chart-controls {
  display: flex;
  gap: var(--space-2);
}

.chart-control-btn {
  width: 32px;
  height: 32px;
  border: none;
  border-radius: var(--border-radius-md);
  background: var(--bg-secondary);
  color: var(--text-secondary);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition-base);
}

.chart-control-btn:hover {
  background: var(--primary-500);
  color: white;
}

.chart-tabs {
  display: flex;
  gap: var(--space-2);
}

.chart-tab {
  padding: var(--space-2) var(--space-3);
  border: none;
  border-radius: var(--border-radius-md);
  background: transparent;
  color: var(--text-secondary);
  cursor: pointer;
  transition: all var(--transition-base);
  font-size: var(--text-sm);
}

.chart-tab:hover,
.chart-tab.active {
  background: var(--bg-secondary);
  color: var(--text-primary);
}

.chart-container {
  padding: var(--space-6);
  height: 300px;
  position: relative;
}

.trend-chart .chart-container {
  height: 200px;
}

/* === BUDGET OVERVIEW === */
.budget-overview .chart-container {
  height: auto;
  padding: 0;
}

.budget-items {
  padding: var(--space-4);
}

.budget-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-4);
  margin-bottom: var(--space-3);
  background: var(--bg-secondary);
  border-radius: var(--border-radius-lg);
  transition: all var(--transition-base);
}

.budget-item:hover {
  background: var(--bg-tertiary);
}

.budget-info {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.budget-category-icon {
  width: 32px;
  height: 32px;
  border-radius: var(--border-radius-md);
  background: var(--primary-100);
  color: var(--primary-600);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--text-sm);
}

.budget-details h4 {
  font-size: var(--text-base);
  margin-bottom: var(--space-1);
}

.budget-progress-info {
  font-size: var(--text-sm);
  color: var(--text-secondary);
}

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

.budget-amount {
  font-size: var(--text-lg);
  font-weight: var(--font-semibold);
  margin-bottom: var(--space-1);
}

.budget-percentage {
  font-size: var(--text-sm);
  color: var(--text-secondary);
}

.budget-warning {
  color: var(--warning-600);
}

.budget-danger {
  color: var(--error-600);
}

.empty-budget {
  text-align: center;
  padding: var(--space-8);
  color: var(--text-secondary);
}

/* === FILTERS SECTION === */
.filters-section {
  margin-bottom: var(--space-8);
}

.filters-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--space-6);
}

.filters-header h2 {
  font-size: var(--text-xl);
  font-weight: var(--font-bold);
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.filters-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: var(--space-4);
  padding: var(--space-6);
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: var(--border-radius-xl);
  backdrop-filter: blur(10px);
}

.filter-group {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.filter-group label {
  font-size: var(--text-sm);
  font-weight: var(--font-medium);
  color: var(--text-secondary);
}

/* === TRANSACTIONS SECTION === */
.transactions-section {
  margin-bottom: var(--space-8);
}

.transactions-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--space-6);
  flex-wrap: wrap;
  gap: var(--space-4);
}

.transactions-header h2 {
  font-size: var(--text-xl);
  font-weight: var(--font-bold);
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.transactions-controls {
  display: flex;
  align-items: center;
  gap: var(--space-4);
}

.transactions-count {
  font-size: var(--text-sm);
  color: var(--text-secondary);
}

.transactions-list {
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: var(--border-radius-xl);
  backdrop-filter: blur(10px);
  overflow: hidden;
}

.transaction-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-4) var(--space-6);
  border-bottom: 1px solid var(--border-color);
  transition: all var(--transition-base);
  position: relative;
}

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

.transaction-item:hover {
  background: var(--bg-secondary);
}

.transaction-item::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 4px;
  background: var(--neutral-300);
  transition: all var(--transition-base);
}

.transaction-item.income::before {
  background: var(--success-500);
}

.transaction-item.expense::before {
  background: var(--error-500);
}

.transaction-main {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  flex: 1;
}

.transaction-icon {
  width: 40px;
  height: 40px;
  border-radius: var(--border-radius-lg);
  background: var(--bg-tertiary);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-secondary);
  flex-shrink: 0;
}

.transaction-details h4 {
  font-size: var(--text-base);
  font-weight: var(--font-medium);
  margin-bottom: var(--space-1);
}

.transaction-meta {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  font-size: var(--text-sm);
  color: var(--text-secondary);
}

.transaction-category {
  display: flex;
  align-items: center;
  gap: var(--space-1);
  padding: var(--space-1) var(--space-2);
  background: var(--bg-tertiary);
  border-radius: var(--border-radius-md);
}

.transaction-amount {
  font-size: var(--text-lg);
  font-weight: var(--font-semibold);
  margin-right: var(--space-4);
}

.transaction-amount.income {
  color: var(--success-600);
}

.transaction-amount.expense {
  color: var(--error-600);
}

.transaction-actions {
  display: flex;
  gap: var(--space-2);
  opacity: 0;
  transition: all var(--transition-base);
}

.transaction-item:hover .transaction-actions {
  opacity: 1;
}

.transaction-action-btn {
  width: 32px;
  height: 32px;
  border: none;
  border-radius: var(--border-radius-md);
  background: var(--bg-tertiary);
  color: var(--text-secondary);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition-base);
}

.transaction-action-btn:hover {
  background: var(--primary-500);
  color: white;
}

.transaction-action-btn.delete:hover {
  background: var(--error-500);
}

.empty-transactions {
  text-align: center;
  padding: var(--space-16);
  color: var(--text-secondary);
}

.empty-transactions i {
  font-size: 3rem;
  margin-bottom: var(--space-4);
}

/* === PAGINATION === */
.pagination {
  display: flex;
  justify-content: center;
  gap: var(--space-2);
  margin-top: var(--space-6);
}

.pagination-btn {
  width: 40px;
  height: 40px;
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius-md);
  background: var(--bg-primary);
  color: var(--text-primary);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition-base);
}

.pagination-btn:hover,
.pagination-btn.active {
  background: var(--primary-600);
  color: white;
  border-color: var(--primary-600);
}

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

/* === INSIGHTS SECTION === */
.insights-section {
  margin-bottom: var(--space-8);
}

.insights-section h2 {
  font-size: var(--text-xl);
  font-weight: var(--font-bold);
  margin-bottom: var(--space-6);
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.insights-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--space-4);
}

.insight-card {
  padding: var(--space-6);
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: var(--border-radius-xl);
  backdrop-filter: blur(10px);
  transition: all var(--transition-base);
}

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

.insight-header {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  margin-bottom: var(--space-4);
}

.insight-icon {
  width: 40px;
  height: 40px;
  border-radius: var(--border-radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-size: var(--text-lg);
}

.insight-icon.tip {
  background: var(--gradient-primary);
}

.insight-icon.warning {
  background: linear-gradient(135deg, var(--warning-500), var(--warning-600));
}

.insight-icon.success {
  background: var(--gradient-secondary);
}

.insight-title {
  font-size: var(--text-lg);
  font-weight: var(--font-semibold);
}

.insight-content {
  color: var(--text-secondary);
  line-height: var(--leading-relaxed);
}

/* === MODALS === */
.modal {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100vh;
  z-index: 2000;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-base);
}

.modal.show {
  opacity: 1;
  visibility: visible;
}

.modal-backdrop {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.8);
  backdrop-filter: blur(4px);
}

.modal-content {
  position: relative;
  background: var(--bg-primary);
  border-radius: var(--border-radius-xl);
  box-shadow: var(--shadow-2xl);
  max-width: 600px;
  width: 90%;
  max-height: 80vh;
  overflow: hidden;
  transform: scale(0.9);
  transition: all var(--transition-base);
}

.modal.show .modal-content {
  transform: scale(1);
}

.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-6);
  border-bottom: 1px solid var(--border-color);
}

.modal-header h3 {
  font-size: var(--text-xl);
  font-weight: var(--font-semibold);
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.modal-close {
  width: 40px;
  height: 40px;
  border: none;
  border-radius: var(--border-radius-lg);
  background: var(--bg-secondary);
  color: var(--text-secondary);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition-base);
}

.modal-close:hover {
  background: var(--error-500);
  color: white;
}

.modal-body {
  padding: var(--space-6);
  max-height: 60vh;
  overflow-y: auto;
}

.modal-footer {
  display: flex;
  justify-content: flex-end;
  gap: var(--space-3);
  padding: var(--space-6);
  border-top: 1px solid var(--border-color);
}

/* === BUDGET MANAGEMENT === */
.budget-form {
  margin-bottom: var(--space-6);
}

.existing-budgets {
  border-top: 1px solid var(--border-color);
  padding-top: var(--space-6);
}

.existing-budget-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-4);
  background: var(--bg-secondary);
  border-radius: var(--border-radius-lg);
  margin-bottom: var(--space-3);
}

.budget-remove-btn {
  background: var(--error-500);
  color: white;
  border: none;
  border-radius: var(--border-radius-md);
  padding: var(--space-2);
  cursor: pointer;
  transition: all var(--transition-base);
}

.budget-remove-btn:hover {
  background: var(--error-600);
}

/* === NOTIFICATIONS === */
.notification-container {
  position: fixed;
  top: var(--space-6);
  right: var(--space-6);
  z-index: 3000;
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  max-width: 400px;
}

.notification {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-4) var(--space-6);
  background: var(--bg-primary);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius-lg);
  box-shadow: var(--shadow-xl);
  transform: translateX(100%);
  transition: all var(--transition-base);
}

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

.notification.success {
  border-color: var(--success-300);
  background: var(--success-50);
  color: var(--success-700);
}

.notification.error {
  border-color: var(--error-300);
  background: var(--error-50);
  color: var(--error-700);
}

.notification.info {
  border-color: var(--primary-300);
  background: var(--primary-50);
  color: var(--primary-700);
}

.notification.warning {
  border-color: var(--warning-300);
  background: var(--warning-50);
  color: var(--warning-700);
}

/* === RESPONSIVE DESIGN === */
@media (max-width: 1024px) {
  .charts-grid {
    grid-template-columns: 1fr;
  }
  
  .chart-card.trend-chart {
    grid-column: 1;
  }
}

@media (max-width: 768px) {
  .app-container {
    padding: var(--space-16) var(--space-4) var(--space-8);
  }
  
  .header-content {
    flex-direction: column;
    align-items: flex-start;
  }
  
  .balance-overview {
    width: 100%;
    justify-content: center;
  }
  
  .balance-main {
    text-align: center;
  }
  
  .financial-summary {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .quick-actions {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .form-row {
    grid-template-columns: 1fr;
  }
  
  .transaction-type-group {
    flex-direction: column;
  }
  
  .filters-grid {
    grid-template-columns: 1fr;
  }
  
  .transactions-header {
    flex-direction: column;
    align-items: stretch;
  }
  
  .transaction-item {
    flex-direction: column;
    align-items: stretch;
    gap: var(--space-3);
  }
  
  .transaction-main {
    gap: var(--space-3);
  }
  
  .transaction-actions {
    opacity: 1;
    align-self: flex-end;
  }
}

@media (max-width: 480px) {
  .theme-toggle,
  .back-button {
    position: relative;
    top: auto;
    left: auto;
    right: auto;
    margin-bottom: var(--space-4);
  }
  
  .app-container {
    padding-top: var(--space-8);
  }
  
  .balance-amount {
    font-size: var(--text-3xl);
  }
  
  .financial-summary {
    grid-template-columns: 1fr;
  }
  
  .quick-actions {
    grid-template-columns: 1fr;
  }
  
  .modal-content {
    width: 95%;
    margin: var(--space-4);
  }
  
  .notification-container {
    left: var(--space-4);
    right: var(--space-4);
    max-width: none;
  }
}

/* === ACCESSIBILITY === */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

/* Focus styles */
:focus-visible {
  outline: 2px solid var(--success-500);
  outline-offset: 2px;
}

/* High contrast mode */
@media (prefers-contrast: high) {
  .glass {
    background: var(--bg-primary);
    border: 2px solid var(--border-color);
  }
  
  .transaction-item {
    border-width: 2px;
  }
}