body {
    background: url(https://img.freepik.com/free-photo/abstract-grunge-decorative-relief-navy-blue-stucco-wall-texture-wide-angle-rough-colored-background_1258-28311.jpg?w=2000) no-repeat center center fixed;
    background-size: cover;
    font-family: sans-serif;
    padding: 20px;
  }
  
  .main-area {
    width: 80%;
    background-color: blue;
    opacity: 95%;
    color: white;
    margin-left: auto;
    margin-right: auto;
    padding: 30px;
    max-width: 800px;
    text-align: center;
  }
  
  h1 {
    font-size: 40px;
    margin-top: 0;
    margin-bottom: 15px;
  }

fieldset {
    border: none;
    padding: .5rem 0;
    margin: .5rem 0;
}

label {
    display: block;
    margin: .5rem 0;
}

input, textarea, select {
    margin: 10px 0 0 0;
    width: 50%;
    min-height: 1em;
}

.inline {
    width: unset;
    margin: 0 0.5em 0 0;
    vertical-align: middle;
}