App.cs file for Cash Register Manager

App.css

.App {
  display: flex;
  flex-direction: column;
  align-items: center;
  font-family: monospace;
}
.heading {
  padding-top: 20vh;
  font-size: xx-large;
}
.cash-register {
  display: grid;
  grid-template-columns: 50% 50%;
  background-color: white;
  margin: 20px;
  border-radius: 20px;
  box-shadow: -4px 3px 19px 2px #00494d;
  width: 80%;
}
.form {
  padding: 35px;
  display: flex;
  flex-direction: column;
}
label {
  text-align: left;
  color: #5e7a7d;
  font-size: 1.2rem;
  font-weight: 700;
}
input {
  width: 100%;
  padding: 0.3125rem 0.75rem;
  background-color: #f4fafa;
  border: 2px solid transparent;
  border-radius: 5px;
  outline: none;
  font-size: 1.25rem;
  font-weight: 700;
  font-family: monospace;
  color: #00494d;
  text-align: end;
  cursor: pointer;
}
input:active, input:focus{
  border:#0a767c 1.5px solid;
}

button{
  background-color: #00494d;
  color: white;
  border:none;
  border-radius: 10px;
  padding:15px;
  font-family: monospace;
  font-size: 1rem;
  font-weight: 600;
  width: 50%;
  align-self: center;
}

@media screen and (max-width: 960px) {
  button{
    width: 100%;
  }
  
}