.site-header {
  background-color: #151515;
  padding: 1em 2em;
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-bottom: 1px solid #333;
}

.site-title {
  margin: 0;
  font-size: 1.5em;
  color: #66ccff;
}

.back-link {
  background-color: #66ccff;
  color: #0f0f0f;
  text-decoration: none;
  padding: 0.5em 1em;
  border-radius: 5px;
  font-weight: bold;
}

.chart {
  height: 400px;
}

body {
    font-family: 'Segoe UI', sans-serif;
    background-color: #0f0f0f;
    color: #f0f0f0;
    margin: 0;
    padding: 2em;
  }
  
  h1 {
    color: #66ccff;
  }
  
  .upload-box {
    margin-bottom: 2em;
  }
  
  table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 1em;
  }
  
  th, td {
    padding: 0.5em;
    border: 1px solid #444;
  }
  
  #charts {
    margin-top: 2em;
  }