body {
  font-family: Arial, sans-serif;
  background-color: #f5f5f5;
  margin: 0;
  padding: 20px 20px;
  text-align: center;
}

.main-content {
  max-width: 600px;
  margin: 0 auto 20px auto;
  background: #fff;
  padding: 30px;
  border-radius: 10px;
  /* box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1); */
}

h1 {
  color: #333;
  margin-top: 0;
}

input[type="file"] {
  display: none;
}

.custom-file-upload {
  display: inline-block;
  background-color: #94cc94;
  color: white;
  padding: 10px 20px;
  border-radius: 6px;
  margin-top: 20px;
  cursor: pointer;
  font-weight: 500;
  transition: background-color 0.2s ease, transform 0.1s ease;
}

.custom-file-upload:hover {
  background-color: #007f00;
  transform: scale(1.02);
}

#file-name {
  margin-top: 10px;
  color: #666;
}

#plot {
  margin: 0 auto;
  width: 100%;
  max-width: 1200px;
  height: 500px;
  background-color: #fff;
  border: 1px solid #ccc;
  border-radius: 8px;
  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.05);
}