* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}
body {
  background-color: rgb(213, 206, 206);
}
#main {
  height: 350px;
  width: 460px;
  border-radius: 15px;
  background-color: white;
  margin: 100px auto;
  padding: 10px;
  padding-top: 20px;
  box-shadow: 0 0 10px;
}
h1 {
  font-family: Arial, Helvetica, sans-serif;
  text-align: center;
  margin-bottom: 10px;
}
p {
  font-family: Arial, Helvetica, sans-serif;
}
form {
  margin-top: 20px;
}
label {
  display: block;
  font-family: monospace;
  font-size: 15px;
}
input {
  display: block;
  width: 100%;
  height: 30px;
  border-radius: 5px;
  border: 1px solid;
  margin-bottom: 10px;
  margin-top: 10px;
  padding-left: 10px;
}
button {
  display: block;
  width: 100%;
  height: 40px;
  border: 0;
  border-radius: 5px;
  background-color: rgb(71, 105, 180);
  color: white;
}
p:nth-of-type(2) {
  margin-top: 20px;
}
#total {
  font-size: 22px;
}