styles.css

body {
  font-family: sans-serif;
}

form {
  max-width: 600px;
  margin: 10px auto;
  border: 1px solid #ccc;
  border-radius: 3px;
  box-shadow: 1 1 2px rgba(0, 0, 0, 0.3);
  padding: 10px;
  display: flex;
  flex-flow: column nowrap;
}

h1 {
  text-align: center;
  color: #333;
}

p {
  margin: 10px auto;
  line-height: 1.2em;
  max-width: 500px;
}

div {
  margin: 10px;
  display: flex;
  flex-flow: row nowrap;
  justify-content: center;
}

label {
  width: 120px;
  text-align: right;
  margin-right: 15px;
  padding: 5px;
}

input,
textarea {
  padding: 5px;
  flex: 1;
  border: 1px solid #ccc;
  border-radius: 3px;
}

select {
  flex: 1;
  height: 24px;
  border: 1px solid #ccc;
  border-radius: 3px;
}

span {
  color: #600;
  font-weight: bold;
  margin: 0 0 0 10px;
  line-height: 26px;
}

button {
  width: 80px;
  display: block;
  margin: 0 auto;
}

li {
  display: inline-flex;
}

li span {
  cursor: pointer;
}