* {
  box-sizing: border-box;
}
 
body {
  font-family: 'Roboto Slab';
  font-size: 1.5rem;
  font-weight: 300;
}
 
div#contact_form {
  width: 800px;
  display: flex;
  align-items: stretch;
  justify-content: space-evenly;
  border: 2px solid black;
  padding: 10px;
}
 
div.input-box {
  display: flex;
  margin: 10px 0;
  flex-wrap: wrap;
}
 
div.input-box label {
  display: inline-block;
  margin: 10px 10px 10px 0;
  width: 20%;
}
 
div.input-box input {
  font-size: 1.5rem;
  border: 1px solid #ccc;
  padding: 4px 8px;
  flex: 1;
}
 
input.button {
  font-size: 1.5rem;
  background: black;
  color: white;
  border: 1px solid black;
  margin: 10px;
  padding: 4px 40px;
}
 
h1 {
  font-size: 5rem;
  text-transform: uppercase;
  font-family: 'Passion One';
  font-weight: 400;
  letter-spacing: 2px;
  line-height: 0.8;
}
 
div.greetings {
  text-align: center;
  font-size: 1.2rem;
  background-color: #d3d3d3;
  background-image: linear-gradient(15deg, transparent 28%, rgba(255, 255, 255, 0.5) 28%);
  background-size: 50px;
}
 
div.input-box input.error {
    border: 2px dashed red;
    background: #fee;
}
 
div.input-box label.error {
    color: red;
    font-size: 1rem;
    text-align: right;
    width: 100%;
    margin: 10px 0;
}