body {
  background-color: #f4f6f9;
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

.navbar-brand {
  font-size: 1.25rem;
  letter-spacing: 0.5px;
}

.card {
  border-radius: 8px;
  box-shadow: 0 2px 6px rgba(0,0,0,0.1);
}

.btn {
  border-radius: 6px;
}

.table th {
  background-color: #0069d9;
  color: #fff;
}

.report-header {
  text-align: center;
  margin-bottom: 20px;
}

.report-header img {
  max-height: 80px;
  margin-bottom: 10px;
}