style.css

#h1 {
  text-align: center; 
  color: white; 
  font-family: Cambria, Cochin, Georgia, Times, 'Times New Roman', serif
}

.square {
    float: left;
    width: 30%;
    height: 0;
    padding-bottom: 30%;
    background-color: white;
    margin: 1.66%;
    border-radius: 15pt;
    transition-duration: 0.6s;
}

.container {
    max-width: 600px;
}

#stripe {
    background-color: white;
    height: 30px;
    text-align: center;
    border-radius: 4px;
}

.selected {
    background-color: tomato;
}

button{
    background-color: inherit;
    text-transform: uppercase;
    letter-spacing: 1px;
    font-weight: 700;
    height: 100%;
    outline: none;
    border: none;
    transition: all 0.4s;
    -webkit-transition: all 0.3s;
    -moz-transition: all 0.3s;
    font-family:Cambria, Cochin, Georgia, Times, 'Times New Roman', serif  }

  button:hover{
    color: white;
    background: yellowgreen
  }

  #message{
    display: inline-block;
    width: 15%;
    font-family: Cambria, Cochin, Georgia, Times, 'Times New Roman', serif;
    color: black; 
  }