body.error404 { background-image: linear-gradient(to right, #7c5ac2 0%, #3232b7 100%); }
body.error404 > .error-content {
    min-height: 80vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: 30px;
}
.error404 .mini-text {
    font-size: 35px;
    font-weight: 600;
    margin-bottom: 0;
    color: #fff;
}
.error404 .img-cartoon { width: 170px; height: 170px; }
.error404 .error-number {
  font-size: 170px;
  color: #fff;
  font-weight: 600;
  margin-bottom: 5px;
  margin-top: 15px;
}
.error404 .error-text { font-size: 20px; color: #fff; }
.error404 a.btn {
  width: 205px;
  padding: 11px;
  font-size: 20px;
  background-image: linear-gradient(to right, #4facfe 0%, #00f2fe 100%);
  border: none;
}
.error404 a.btn:hover, .error404 a.btn:not(:disabled):not(.disabled):active { background-image: linear-gradient(to right, #00f2fe 0%, #4facfe 100%); }