:root {
  --primary: #6366f1;
  --primary-dark: #4f46e5;
  --secondary: #64748b;
  --light: #f8fafc;
  --dark: #1e293b;
  --success: #10b981;
  --warning: #f59e0b;
  --danger: #ef4444;
  --info: #0ea5e9;
  --sidebar-width: 280px;
  --header-height: 70px;
  --border-radius: 12px;
  --box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
}

body {
  background-color: #f8f9fa;
  font-family: 'Inter', sans-serif;
  color: var(--dark);
}

/* Sidebar Styling */
.sidebar {
  min-height: 100vh;
  width: var(--sidebar-width);
  background: linear-gradient(180deg, var(--primary-dark) 0%, var(--primary) 100%);
  position: fixed;
  top: 0;
  left: 0;
  padding-top: var(--header-height);
  z-index: 1000;
  box-shadow: var(--box-shadow);
}

.sidebar .nav-link {
  color: rgba(255, 255, 255, 0.85);
  padding: 0.8rem 1.5rem;
  margin: 0.2rem 1rem;
  border-radius: var(--border-radius);
  font-weight: 500;
  transition: all 0.3s ease;
}

.sidebar .nav-link:hover,
.sidebar .nav-link.active {
  background-color: rgba(255, 255, 255, 0.15);
  color: #fff;
}

.sidebar .nav-link i {
  width: 24px;
  margin-right: 12px;
}

/* Header/Navbar Styling */
.navbar {
  height: var(--header-height);
  background: #fff;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
  padding: 0 1.5rem;
  position: fixed;
  top: 0;
  left: var(--sidebar-width);
  right: 0;
  z-index: 999;
}

.navbar-brand {
  font-weight: 700;
  color: var(--primary-dark);
  font-size: 1.5rem;
}

/* Main Content */
.main-content {
  margin-left: var(--sidebar-width);
  padding: calc(var(--header-height) + 1.5rem) 1.5rem 1.5rem;
}

/* Card Styling */
.card {
  border: none;
  border-radius: var(--border-radius);
  box-shadow: var(--box-shadow);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.card:hover {
  transform: translateY(-5px);
  box-shadow: 0 8px 25px rgba(0, 0, 0, 0.1);
}

.card-header {
  background-color: #fff;
  border-bottom: 1px solid #f1f5f9;
  font-weight: 600;
  padding: 1rem 1.5rem;
  border-radius: var(--border-radius) var(--border-radius) 0 0 !important;
}

/* KPI Cards */
.card-kpi {
  border-left: 4px solid var(--primary);
}

.card-kpi .display-6 {
  font-weight: 700;
  color: var(--dark);
}

.card-kpi .text-muted {
  font-size: 0.9rem;
  font-weight: 500;
}

/* Chart Containers */
.chart-container {
  position: relative;
  height: 250px;
  width: 100%;
}

/* Badges */
.badge {
  font-weight: 500;
  padding: 0.35em 0.65em;
}

/* Tables */
.table th {
  font-weight: 600;
  color: var(--secondary);
  border-top: none;
}

.table td {
  vertical-align: middle;
}

/* Buttons */
.btn-primary {
  background-color: var(--primary);
  border-color: var(--primary);
}

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

/* Utilities */
.text-primary {
  color: var(--primary) !important;
}

.bg-primary {
  background-color: var(--primary) !important;
}

/* Responsive adjustments */
@media (max-width: 992px) {
  .sidebar {
    transform: translateX(-100%);
    transition: transform 0.3s ease;
  }
  
  .sidebar.show {
    transform: translateX(0);
  }
  
  .navbar {
    left: 0;
  }
  
  .main-content {
    margin-left: 0;
  }
}

/* Animation for page content */
.fade-in {
  animation: fadeIn 0.5s ease-in;
}

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