body {
  font-family: Arial, sans-serif;
  display: flex;
  flex-direction: row;
  height: 100vh;
  margin: 0;
}

#input-section {
  width: 18%;
  background-color: #eef2f3;
  padding: 20px;
  box-sizing: border-box;
}

#plot-section {
  width: 82%;
  display: flex;
  justify-content: center;
  align-items: center;
  background-color: #fff;
  padding: 20px;
  box-sizing: border-box;
}

h1 {
  margin-top: 0;
  font-size: 38px;
  text-align: center;
}

label {
  display: block;
  margin-bottom: 4px;
  font-size: 20px;
}

select {
  appearance: none;
  -webkit-appearance: none;
  -moz-appearance: none;
  padding: 7px;
  border: 1px solid #c0c0c0;
  border-radius: 40px;
  background-size: 25px;
  background-color: #fff;
  cursor: pointer;
}

label.velocity-unit {
  margin-left: 3px;
  text-align: center;
  font-size: 25px;
}

input {
  width: 100%;
  padding: 6px;
  border: 1px solid #c0c0c0;
  border-radius: 6px;
}

#plot-button {
  margin-top: 14px;
  margin-left: auto;
  padding: 15px 7px;
  background-color: #0d5ddfc5;
  color: white;
  border: none;
  border-radius: 9px;
  cursor: pointer;
  font-size: 35px;
  transition: background-color 0.2s ease;
}

#toggle-plot {
  margin-top: 14px;
  margin-left: auto;
  padding: 15px 5px;
  background-color: #0d5ddfc5;
  color: white;
  border: none;
  border-radius: 9px;
  cursor: pointer;
  font-size: 35px;
  transition: background-color 0.2s ease;
}

#toggle-plot:hover {
  background-color: #e45650;
}

#plot-button:hover {
  background-color: #e45650;
}

#plot {
  width: 100%;
  height: 100%;
}