.my-button {
  background-color: #4CAF50;
  border: none;
  color: white;
  width: 100%;
  height: 100%;
  box-sizing: border-box;
  text-align: center;
  text-decoration: none;
  display: inline-block;
  transition-duration: 0.4s;
  cursor: pointer;
}

.my-button:hover {
  background-color: #65a049;
}
.my-button2 {
  display: inline-block;
  padding: 4px 20px;
  background-color: #4CAF50;
  color: white;
  text-align: center;
  text-decoration: none;
  border-radius: 5px;
  border: none;
  cursor: pointer;
}

.button-text {
  margin-left: 10px; /* 왼쪽 마진 */
  margin-right: 10px; /* 오른쪽 마진 */
}

.my-button2:hover {
  background-color: #45a049;
}
.my-button3 {
  background-color: #4CAF50;
  border: none;
  color: white;
  box-sizing: border-box;
  text-align: center;
  text-decoration: none;
  display: inline-block;
  transition-duration: 0.4s;
  cursor: pointer;
}

.my-button3:hover {
  background-color: #65a049;
}

.center-screen {
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  text-align: center;
  min-height: 100vh;
}

.container {
  height: 200px;
  position: relative;
  border: 1px solid green;
}

.vertical-center {
  margin: 0;
  position: absolute;
  top: 50%;
  -ms-transform: translateY(-50%);
  transform: translateY(-50%);
}
#snackbar {
  visibility: hidden;
  min-width: 250px;
  margin-left: -125px;
  background-color: #333;
  color: #fff;
  text-align: center;
  border-radius: 2px;
  padding: 16px;
  position: fixed;
  z-index: 1;
  left: 50%;
  bottom: 30px;
  font-size: 17px;
}

#snackbar.show {
  visibility: visible;
  -webkit-animation: fadein 0.5s, fadeout 0.5s 2.5s;
  animation: fadein 0.5s, fadeout 0.5s 2.5s;
}
@-webkit-keyframes fadein {
  from {bottom: 0; opacity: 0;} 
  to {bottom: 30px; opacity: 1;}
}

@keyframes fadein {
  from {bottom: 0; opacity: 0;}
  to {bottom: 30px; opacity: 1;}
}

@-webkit-keyframes fadeout {
  from {bottom: 30px; opacity: 1;} 
  to {bottom: 0; opacity: 0;}
}
@keyframes fadeout {
  from {bottom: 30px; opacity: 1;}
  to {bottom: 0; opacity: 0;}
}