:root {
  /* Color Palette - Modern Banking/Fintech Aesthetic */
  --bg-primary: #0a0a0c;
  --bg-secondary: #16161a;
  --bg-card: #1f1f24;
  --bg-hover: #2a2a30;
  
  --text-primary: #f8f9fa;
  --text-secondary: #a0a0ab;
  --text-dim: #71717a;
  
  --accent-primary: #6366f1; /* Indigo */
  --accent-secondary: #8b5cf6; /* Violet */
  --accent-success: #10b981; /* Emerald */
  --accent-danger: #ef4444; /* Rose */
  --accent-warning: #f59e0b; /* Amber */
  
  --border-color: rgba(255, 255, 255, 0.08);
  --border-focus: rgba(99, 102, 241, 0.5);
  
  --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);

  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --radius-full: 9999px;
  
  --space-xs: 4px;
  --space-sm: 8px;
  --space-md: 16px;
  --space-lg: 24px;
  --space-xl: 32px;
  --space-2xl: 48px;
  
  --nav-width: 260px;
}

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

body {
  font-family: 'Inter', system-ui, -apple-system, sans-serif;
  background-color: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  min-height: 100vh;
  display: flex;
}

/* Layout */
.sidebar {
  width: var(--nav-width);
  height: 100vh;
  background-color: var(--bg-secondary);
  border-right: 1px solid var(--border-color);
  display: flex;
  flex-direction: column;
  position: fixed;
  left: 0;
  top: 0;
  z-index: 100;
}

.main-content {
  margin-left: var(--nav-width);
  flex: 1;
  padding: var(--space-xl);
  max-width: 1400px;
}

/* Sidebar Styling */
.sidebar-header {
  padding: var(--space-xl) var(--space-lg);
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

.logo-icon {
  width: 32px;
  height: 32px;
  background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
}

.logo-text {
  font-weight: 700;
  font-size: 1.25rem;
  letter-spacing: -0.02em;
}

.nav-links {
  list-style: none;
  padding: 0 var(--space-md);
  flex: 1;
}

.nav-item {
  margin-bottom: var(--space-xs);
}

.nav-link {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  padding: var(--space-md);
  color: var(--text-secondary);
  text-decoration: none;
  border-radius: var(--radius-md);
  transition: all 0.2s ease;
  font-weight: 500;
}

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

.nav-link.active {
  background-color: rgba(99, 102, 241, 0.1);
  color: var(--accent-primary);
}

.nav-link svg {
  width: 20px;
  height: 20px;
  opacity: 0.7;
}

.nav-link.active svg {
  opacity: 1;
}

.sidebar-footer {
  padding: var(--space-lg);
  border-top: 1px solid var(--border-color);
}

.user-profile {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  padding: var(--space-sm);
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: background 0.2s;
}

.user-profile:hover {
  background-color: var(--bg-hover);
}

.user-name {
  font-weight: 600;
  font-size: 0.9rem;
}

/* Page Header */
.page-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  margin-bottom: var(--space-2xl);
}

.header-title h1 {
  font-size: 2rem;
  font-weight: 800;
  letter-spacing: -0.03em;
  margin-bottom: var(--space-xs);
}

.header-title p {
  color: var(--text-secondary);
}

.header-actions {
  display: flex;
  gap: var(--space-md);
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  padding: 10px 20px;
  border-radius: var(--radius-md);
  font-weight: 600;
  cursor: pointer;
  border: none;
  transition: all 0.2s;
  font-size: 0.95rem;
  text-decoration: none;
}

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

.btn-primary:hover {
  background: #4f46e5;
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(99, 102, 241, 0.3);
}

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

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

/* Accounts Styles */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: var(--space-lg);
  margin-bottom: var(--space-2xl);
}

.stat-card {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  padding: var(--space-lg);
  border-radius: var(--radius-lg);
}

.stat-label {
  font-size: 0.85rem;
  color: var(--text-secondary);
  margin-bottom: var(--space-xs);
}

.stat-value {
  font-size: 1.5rem;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.stat-value.positive { color: var(--accent-success); }

.account-card {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  min-height: 200px;
}

.account-card-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
}

.account-type-icon {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--border-color);
}

.account-balance {
  margin-top: var(--space-xl);
}

.account-balance .amount {
  font-size: 1.75rem;
  font-weight: 700;
  display: block;
}

.account-balance .label {
  font-size: 0.75rem;
  color: var(--text-dim);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.account-footer {
  margin-top: var(--space-lg);
  padding-top: var(--space-md);
  border-top: 1px solid var(--border-color);
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.85rem;
}

.account-number {
  color: var(--text-dim);
  font-family: monospace;
}

.status-indicator {
  display: flex;
  align-items: center;
  gap: var(--space-xs);
}

.status-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
}

.status-dot.active { background: var(--accent-success); box-shadow: 0 0 8px var(--accent-success); }

/* Category Grid */
.category-section {
  margin-bottom: var(--space-2xl);
}

.section-title {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  margin-bottom: var(--space-lg);
}

.section-title h2 {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text-primary);
}

.section-title .badge {
  padding: 4px 12px;
  border-radius: var(--radius-full);
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
}

.badge-income { background: rgba(16, 185, 129, 0.1); color: var(--accent-success); border: 1px solid rgba(16, 185, 129, 0.2); }
.badge-expense { background: rgba(239, 68, 68, 0.1); color: var(--accent-danger); border: 1px solid rgba(239, 68, 68, 0.2); }

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: var(--space-lg);
}

.card {
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: var(--space-lg);
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  position: relative;
  overflow: hidden;
}

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

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

.category-icon {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg-hover);
  color: var(--text-primary);
  border: 1px solid var(--border-color);
}

.card-actions {
  display: flex;
  gap: var(--space-xs);
  opacity: 0;
  transition: opacity 0.2s;
}

.card:hover .card-actions {
  opacity: 1;
}

.action-btn {
  width: 32px;
  height: 32px;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg-primary);
  border: 1px solid var(--border-color);
  color: var(--text-secondary);
  cursor: pointer;
  transition: all 0.2s;
}

.action-btn:hover {
  color: var(--text-primary);
  background: var(--bg-hover);
}

.card-content h3 {
  font-size: 1.1rem;
  font-weight: 600;
  margin-bottom: 4px;
}

.card-meta {
  display: flex;
  gap: var(--space-md);
  font-size: 0.85rem;
  color: var(--text-secondary);
}

.subcategories {
  margin-top: var(--space-lg);
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-xs);
}

.subcategory-pill {
  padding: 4px 10px;
  background: var(--bg-primary);
  border-radius: var(--radius-sm);
  font-size: 0.75rem;
  color: var(--text-dim);
  border: 1px solid var(--border-color);
}

/* Table Styles */
.table-container {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  overflow: hidden;
  margin-top: var(--space-xl);
}

.data-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
}

.data-table th {
  padding: var(--space-md) var(--space-lg);
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-dim);
  border-bottom: 1px solid var(--border-color);
  font-weight: 600;
}

.data-table td {
  padding: var(--space-md) var(--space-lg);
  border-bottom: 1px solid var(--border-color);
  font-size: 0.9rem;
}

.data-table tr:last-child td {
  border-bottom: none;
}

.data-table tr:hover {
  background: rgba(255, 255, 255, 0.02);
}

.amount-cell {
  font-weight: 600;
  text-align: right;
}

.amount-income { color: var(--accent-success); }
.amount-expense { color: var(--text-primary); }

/* Form Styles */
.form-card {
  max-width: 600px;
  margin: 0 auto;
}

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

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

.form-input, .form-select {
  width: 100%;
  padding: 12px 16px;
  background: var(--bg-primary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  color: var(--text-primary);
  font-size: 1rem;
  transition: border-color 0.2s;
}

.form-input:focus, .form-select:focus {
  outline: none;
  border-color: var(--accent-primary);
  box-shadow: 0 0 0 2px var(--border-focus);
}

/* Charts & Graphs Placeholders */
.chart-container {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: var(--space-lg);
  height: 300px;
  display: flex;
  flex-direction: column;
}

.chart-header {
  display: flex;
  justify-content: space-between;
  margin-bottom: var(--space-lg);
}

.chart-visual {
  flex: 1;
  display: flex;
  align-items: flex-end;
  gap: var(--space-sm);
  padding-top: var(--space-md);
}

.chart-bar {
  flex: 1;
  background: var(--accent-primary);
  border-radius: 4px 4px 0 0;
  min-height: 20px;
  transition: height 1s ease;
  position: relative;
}

.chart-bar.secondary {
  background: var(--accent-secondary);
  opacity: 0.6;
}

/* Dashboard Cards */
.dash-grid {
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: var(--space-lg);
}

/* Auth Screens */
.auth-container {
  width: 100%;
  height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: radial-gradient(circle at top right, #1a1a2e, #0a0a0c);
}

.auth-card {
  width: 100%;
  max-width: 400px;
  background: var(--bg-card);
  padding: var(--space-2xl);
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-color);
  text-align: center;
  box-shadow: var(--shadow-lg);
}

.google-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-md);
  width: 100%;
  padding: 14px;
  background: white;
  color: #1f1f24;
  border: none;
  border-radius: var(--radius-md);
  font-weight: 600;
  cursor: pointer;
  margin-top: var(--space-xl);
}

/* Placeholder Utility */
.placeholder-avatar {
  width: 36px;
  height: 36px;
  background: var(--bg-hover);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: bold;
  font-size: 14px;
}

.placeholder-icon {
  width: 24px;
  height: 24px;
  background: currentColor;
  opacity: 0.5;
}

/* Animations */
@keyframes fadeIn {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: translateY(0); }
}

.card {
  animation: fadeIn 0.4s ease-out forwards;
}

.card:nth-child(2) { animation-delay: 0.05s; }
.card:nth-child(3) { animation-delay: 0.1s; }
.card:nth-child(4) { animation-delay: 0.15s; }
.card:nth-child(5) { animation-delay: 0.2s; }
.card:nth-child(6) { animation-delay: 0.25s; }

/* Responsive adjustments */
@media (max-width: 1024px) {
  .sidebar { width: 80px; }
  .logo-text, .nav-text, .user-name, .user-email { display: none; }
  .main-content { margin-left: 80px; }
  .sidebar-header { justify-content: center; }
  .nav-link { justify-content: center; padding: var(--space-md); }
}