:root {
  --primary-color: #E31837; /* Approximate red from logo */
  --secondary-color: #000000;
  --bg-color: #f8f9fa;
  --text-color: #333333;
}

body {
  background-color: var(--bg-color);
  color: var(--text-color);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}

.sidebar {
  min-height: 100vh;
  background-color: var(--secondary-color);
  color: #ffffff;
}

.sidebar .nav-link {
  color: rgba(255,255,255,0.8);
  border-radius: 0;
  padding: 10px 20px;
}

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

.logo-container {
  padding: 20px;
  background-color: #ffffff;
  text-align: center;
  border-bottom: 2px solid var(--primary-color);
}

.logo-container img {
  max-width: 150px;
  height: auto;
}

.main-content {
  padding: 20px;
}

.card {
  border: none;
  border-radius: 4px;
  box-shadow: 0 2px 4px rgba(0,0,0,0.1);
  margin-bottom: 20px;
}

.card-header {
  background-color: #ffffff;
  border-bottom: 1px solid #eeeeee;
  font-weight: bold;
}

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

.btn-primary:hover {
  background-color: #c0142f;
  border-color: #c0142f;
}

.login-container {
  max-width: 400px;
  margin: 100px auto;
}

.login-logo {
  text-align: center;
  margin-bottom: 30px;
}

.login-logo img {
  max-width: 200px;
}

.table th {
  border-top: none;
}