body {
  background: #1D4350;  /* fallback for old browsers */
  background: -webkit-linear-gradient(to right, #A43931, #1D4350);  /* Chrome 10-25, Safari 5.1-6 */
  background: linear-gradient(to right, #A43931, #1D4350); /* W3C, IE 10+/ Edge, Firefox 16+, Chrome 26+, Opera 12+, Safari 7+ */
}

.logo {
  width: 10%;
}