.details-container {
  background: #fff;
  min-height: 100%;
  box-sizing: border-box;
}
.bg {
  position: fixed;
  top: 0;
  height: 120px;
  left: 0;
  right: 0;
  background: linear-gradient(
    269deg
    , #ff5d00 12%, #ff1900 86%);
}
