* {
    padding: 0;
    margin: 0;
    box-sizing: border-box;
  }

  html {
    font-family: 'Montserrat', sans-serif;
  }

  body {
    background: #000;
    position: relative;
  }

  footer {
    position: absolute;
    bottom: 0;
    width: 100%;
    text-align: center;
    color: #fff;
    background-color: #000;
   }

.main-container {
    min-height: 100vh; /* will cover the 100% of viewport */
    overflow: hidden;
    display: block;
    position: relative;
    padding-bottom: 110px; /* height of your footer */
   }

.signature {
    width: 100%;
    height: 100%;
    
}