.buttons {
  display: flex;
  flex-direction: row;
  flex-wrap: wrap;
  justify-content: center;
  text-align: center;
  width: 100%;
  height: 100%;
  margin: 0 auto;
}
.container-button {
  align-items: center;
  display: flex;
  flex-direction: column;
  justify-content: center;
  text-align: center;
  background-color: #fff;
  width: 240px;
}
.btn {
  letter-spacing: 0.1em;
  cursor: pointer;
  font-size: 14px;
  font-weight: 400;
  line-height: 45px;
  max-width: 100%;
  position: relative;
  text-decoration: none;
  text-transform: uppercase;
  width: 100%;
}
.btn:hover {
  text-decoration: none;
}
/*btn_background*/
.effect01 {
  color: #fff;
  border: 4px solid #000;
  box-shadow: 0px 0px 0px 1px #000 inset;
  background-image: linear-gradient(to top, #000 0%, #444 100%); /*Verlauf blau*/
  overflow: hidden;
  position: relative;
  transition: all 0.3s ease-in-out;
  padding: 0;
}
.effect01:hover {
  border: 4px solid #000;
  background-image: linear-gradient(to top, #2e58a6 0%, #110b79 100%); /*Verlauf blau*/
  box-shadow: 0px 0px 0px 4px #fff inset;
}
/*btn_text*/
.effect01 span {
  transition: all 0.2s ease-out;
  z-index: 2;
}
.effect01:hover span {
  letter-spacing: 0.13em;
  color: #ffd900;
}
/*highlight*/
.effect01:after {
  background: #FFF;
  border: 0px solid #000;
  content: "";
  height: 155px;
  left: -75px;
  opacity: .8;
  position: absolute;
  top: -50px;
  -webkit-transform: rotate(35deg);
  transform: rotate(35deg);
  width: 50px;
  transition: all 1s cubic-bezier(0.075, 0.82, 0.165, 1); /*easeOutCirc*/
  z-index: 1;
}
.effect01:hover:after {
  background: #FFF;
  border: 20px solid #000;
  opacity: 0;
  left: 120%;
  -webkit-transform: rotate(40deg);
  transform: rotate(40deg);
}