style.css

body {
  font-family: Arial, sans-serif;
}

#logo {
    height: 100px;
    width: 100px;
    border: none;
    outline: none;
    border-radius: 50%;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 20px;
}

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

.chart-container {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-around;
}

.chart-span {
  flex: 1 1 45%;
  max-width: 45%;
  min-width: 300px;
  margin: 10px;
  text-align: center;
}

.chart-span canvas {
  height: 250px;
  width: 100%;
}

.dark-theme {
  background-color: #333;
  color: white;
}

.dark-theme .form-control,
.dark-theme .btn {
  background-color: #555;
  color: white;
}

.dark-theme .form-control::placeholder {
  color: #ccc;
}

.dark-theme select.form-control {
  background-color: #555;
  color: white;
}