:root {
  --primary-color: #6366f1;
  --primary-hover: #4f46e5;
  --success-color: #10b981;
  --danger-color: #ef4444;
  --warning-color: #f59e0b;
  --bg-light: #f8fafc;
  --bg-dark: #0f172a;
  --card-light: #ffffff;
  --card-dark: #1e293b;
  --text-light: #334155;
  --text-dark: #e2e8f0;
  --border-light: #e2e8f0;
  --border-dark: #334155;
  --sidebar-width: 260px;
}

[data-bs-theme="dark"] {
  --bs-body-bg: var(--bg-dark);
  --bs-body-color: var(--text-dark);
  --bs-border-color: var(--border-dark);
}

body {
  font-family: 'Inter', sans-serif;
  background-color: var(--bg-light);
  color: var(--text-light);
  transition: background-color 0.3s ease, color 0.3s ease;
  overflow-x: hidden;
}

[data-bs-theme="dark"] body {
  background-color: var(--bg-dark);
  color: var(--text-dark);
}

/* Auth Pages (Login / Register) */
.auth-wrapper {
  min-height: 100vh;
  display: flex;
}

.auth-sidebar {
  flex: 1;
  background: linear-gradient(135deg, var(--primary-color), var(--primary-hover));
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  color: white;
  padding: 2rem;
  text-align: center;
}

.auth-sidebar h1 {
  font-weight: 700;
  font-size: 2.5rem;
  margin-bottom: 1rem;
}

.auth-sidebar p {
  font-size: 1.1rem;
  opacity: 0.9;
  max-width: 400px;
}

.auth-main {
  flex: 1;
  display: flex;
  justify-content: center;
  align-items: center;
  background-color: var(--card-light);
  padding: 2rem;
}

[data-bs-theme="dark"] .auth-main {
  background-color: var(--card-dark);
}

.auth-card {
  width: 100%;
  max-width: 450px;
  padding: 2.5rem;
  border-radius: 1rem;
  box-shadow: 0 10px 25px rgba(0,0,0,0.05);
  background-color: var(--card-light);
  border: 1px solid var(--border-light);
}

[data-bs-theme="dark"] .auth-card {
  background-color: var(--card-dark);
  border-color: var(--border-dark);
  box-shadow: 0 10px 25px rgba(0,0,0,0.2);
}

/* Dashboard Layout */
.app-wrapper {
  display: flex;
  min-height: 100vh;
}

.sidebar {
  width: var(--sidebar-width);
  background-color: var(--card-light);
  border-right: 1px solid var(--border-light);
  position: fixed;
  height: 100vh;
  z-index: 1000;
  transition: all 0.3s ease;
  display: flex;
  flex-direction: column;
}

[data-bs-theme="dark"] .sidebar {
  background-color: var(--card-dark);
  border-right-color: var(--border-dark);
}

.sidebar-header {
  padding: 1.5rem;
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--primary-color);
  border-bottom: 1px solid var(--border-light);
}

[data-bs-theme="dark"] .sidebar-header {
  border-bottom-color: var(--border-dark);
}

.sidebar-menu {
  padding: 1rem 0;
  flex: 1;
  overflow-y: auto;
}

.menu-item {
  padding: 0.75rem 1.5rem;
  display: flex;
  align-items: center;
  gap: 1rem;
  color: var(--text-light);
  text-decoration: none;
  font-weight: 500;
  transition: all 0.2s ease;
}

[data-bs-theme="dark"] .menu-item {
  color: var(--text-dark);
}

.menu-item:hover, .menu-item.active {
  background-color: rgba(99, 102, 241, 0.1);
  color: var(--primary-color);
  border-right: 3px solid var(--primary-color);
}

.main-content {
  flex: 1;
  margin-left: var(--sidebar-width);
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

.topbar {
  height: 70px;
  background-color: var(--card-light);
  border-bottom: 1px solid var(--border-light);
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0 2rem;
  position: sticky;
  top: 0;
  z-index: 999;
}

[data-bs-theme="dark"] .topbar {
  background-color: var(--card-dark);
  border-bottom-color: var(--border-dark);
}

.content-wrapper {
  padding: 2rem;
  flex: 1;
}

/* Cards & Widgets */
.stat-card {
  background-color: var(--card-light);
  border-radius: 1rem;
  padding: 1.5rem;
  border: 1px solid var(--border-light);
  box-shadow: 0 4px 6px rgba(0,0,0,0.02);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
  height: 100%;
}

[data-bs-theme="dark"] .stat-card {
  background-color: var(--card-dark);
  border-color: var(--border-dark);
}

.stat-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 10px 15px rgba(0,0,0,0.05);
}

.stat-icon {
  width: 48px;
  height: 48px;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
}

.text-primary-custom { color: var(--primary-color) !important; }
.bg-primary-light { background-color: rgba(99, 102, 241, 0.1); color: var(--primary-color); }
.bg-success-light { background-color: rgba(16, 185, 129, 0.1); color: var(--success-color); }
.bg-danger-light { background-color: rgba(239, 68, 68, 0.1); color: var(--danger-color); }
.bg-warning-light { background-color: rgba(245, 158, 11, 0.1); color: var(--warning-color); }

.stat-value {
  font-size: 1.8rem;
  font-weight: 700;
  margin: 0.5rem 0 0.25rem 0;
}

.stat-label {
  font-size: 0.875rem;
  color: #64748b;
  font-weight: 500;
}

/* Tables */
.table-custom {
  background-color: var(--card-light);
  border-radius: 1rem;
  overflow: hidden;
  border: 1px solid var(--border-light);
}

[data-bs-theme="dark"] .table-custom {
  background-color: var(--card-dark);
  border-color: var(--border-dark);
}

.table-custom th {
  background-color: rgba(0,0,0,0.02);
  font-weight: 600;
  text-transform: uppercase;
  font-size: 0.75rem;
  letter-spacing: 0.05em;
  padding: 1rem;
  border-bottom: 2px solid var(--border-light);
}

[data-bs-theme="dark"] .table-custom th {
  background-color: rgba(255,255,255,0.02);
  border-bottom-color: var(--border-dark);
}

.table-custom td {
  padding: 1rem;
  vertical-align: middle;
  border-bottom: 1px solid var(--border-light);
}

[data-bs-theme="dark"] .table-custom td {
  border-bottom-color: var(--border-dark);
}

.badge-income {
  background-color: rgba(16, 185, 129, 0.1);
  color: var(--success-color);
  padding: 0.35em 0.65em;
  font-weight: 600;
}

.badge-expense {
  background-color: rgba(239, 68, 68, 0.1);
  color: var(--danger-color);
  padding: 0.35em 0.65em;
  font-weight: 600;
}

/* Buttons and Inputs */
.btn-primary {
  background-color: var(--primary-color);
  border-color: var(--primary-color);
  font-weight: 500;
  padding: 0.6rem 1.5rem;
  transition: all 0.2s;
}

.btn-primary:hover {
  background-color: var(--primary-hover);
  border-color: var(--primary-hover);
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(99, 102, 241, 0.3);
}

.form-control, .form-select {
  padding: 0.75rem 1rem;
  border-radius: 0.5rem;
  border: 1px solid var(--border-light);
  background-color: var(--bg-light);
}

.form-control:focus, .form-select:focus {
  border-color: var(--primary-color);
  box-shadow: 0 0 0 0.25rem rgba(99, 102, 241, 0.25);
}

[data-bs-theme="dark"] .form-control, [data-bs-theme="dark"] .form-select {
  background-color: var(--bg-dark);
  border-color: var(--border-dark);
  color: var(--text-dark);
}

/* Theme Toggle */
.theme-toggle {
  background: none;
  border: none;
  font-size: 1.25rem;
  color: inherit;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  transition: background-color 0.2s;
}

.theme-toggle:hover {
  background-color: rgba(0,0,0,0.05);
}

[data-bs-theme="dark"] .theme-toggle:hover {
  background-color: rgba(255,255,255,0.1);
}

/* Responsive */
@media (max-width: 991.98px) {
  .auth-wrapper {
    flex-direction: column;
  }
  .auth-sidebar {
    padding: 3rem 1.5rem;
    flex: none;
  }
  .sidebar {
    transform: translateX(-100%);
  }
  .sidebar.show {
    transform: translateX(0);
  }
  .main-content {
    margin-left: 0;
  }
  .sidebar-toggler {
    display: inline-block !important;
  }
}

.sidebar-toggler {
  display: none;
  background: none;
  border: none;
  font-size: 1.5rem;
  color: inherit;
  cursor: pointer;
}