a.button12 {
  position: relative;
  display: inline-block;
  font-size: 100%;
  font-weight: 700;
  color: #fff;
  text-shadow: #053852 -1px 1px, #053852 1px 1px, #053852 1px -1px, #053852 -1px -1px;
  text-decoration: none;
  user-select: none;
  padding: .3em .7em;
  outline: none;
  border-radius: 7px;
  background: #053852 repeating-linear-gradient(135deg, #053852, #053852 10px, #1679ad 10px, #1679ad 20px, #053852 20px);
  box-shadow:
   inset -2px -2px rgba(0,0,0,.3),
   inset 2px 2px rgba(255,255,255,.3);
  transition: background-position 999999s, color 999999s, text-shadow 999999s;
}
a.button12:hover, a.button12:focus {
  text-shadow: #0175b1 -1px 1px, #0175b1 1px 1px, #0175b1 1px -1px, #0175b1 -1px -1px;
  background: #0175b1 repeating-linear-gradient(135deg, #0175b1, #0175b1 10px, #8fd2f5 10px, #8fd2f5 20px, #0175b1 20px) no-repeat;
  background-size: 1000% 100%;
}
a.button12:hover {
  background-position: 0 0;
}
a.button12:focus {
  color: rgba(255,255,255,0);
  text-shadow: rgba(1,117,177,0) -1px 1px, rgba(1,117,177,0) 1px 1px, rgba(1,117,177,0) 1px -1px, rgba(1,117,177,0) -1px -1px;
  background-position: 900% 0;
  transition: background-position linear 600s, color .5s, text-shadow .5s;
}
a.button12:after {
  content: "загрузка\2026";
  position: absolute;
  top: 0;
  left: 0;
  padding: .3em .7em;
  color: rgba(0,0,0,0);
  text-shadow: none;
  transition: 999999s;
}
a.button12:focus:after {
  color: #fff;
  text-shadow: #0175b1 -1px 1px, #0175b1 1px 1px, #0175b1 1px -1px, #0175b1 -1px -1px;
  transition: .5s;
}