:root {
  --bs-body-bg: #111827;
  --bs-body-color: #f9fafb;
  --primary-color: #9333ea;
  --surface-color: #1f2937;
  --border-color: #374151;
}

body {
  font-family: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}

.sidebar {
  position: fixed;
  top: 0;
  left: 0;
  bottom: 0;
  width: 250px;
  padding: 20px;
  background-color: var(--surface-color);
  border-right: 1px solid var(--border-color);
}

.sidebar .nav-link {
  color: #9ca3af;
  padding: 10px 15px;
  border-radius: 0.375rem;
  margin-bottom: 5px;
  display: flex;
  align-items: center;
}

.sidebar .nav-link i {
  margin-right: 10px;
  width: 20px;
  text-align: center;
}


.sidebar .nav-link:hover, .sidebar .nav-link.active {
  background-color: var(--primary-color);
  color: #fff;
}

.sidebar .logo {
    display: block;
    color: #fff;
    font-size: 1.5rem;
    font-weight: bold;
    text-align: center;
    margin-bottom: 2rem;
    text-decoration: none;
}

.main-content {
  margin-left: 250px;
  padding: 30px;
}

.card {
  background-color: var(--surface-color);
  border: 1px solid var(--border-color);
  border-radius: 0.5rem;
}

.card-header {
    background-color: transparent;
    border-bottom: 1px solid var(--border-color);
}

.stat-card h5 {
    color: #9ca3af;
}

.stat-card .display-4 {
    color: var(--primary-color);
}