.box {
  width: 40%;
  margin: 0 auto;
  background: rgba(255, 255, 255, 0.3);
  padding: 35px;
  border: 2px solid #fff;
  border-radius: 20px/50px;
  background-clip: padding-box;
  text-align: center;
}

.button {
  font-size: 1em;
  padding: 10px;
  color: #fff;
  border: 2px solid #f53;
  border-radius: 20px/50px;
  text-decoration: none;
  cursor: pointer;
  transition: all 0.3s ease-out;
}

.button:hover {
  background: #f53;
}

.overlay {
  position: fixed;
  top: 0;
  bottom: 0;
  left: 0;
  right: 0;
  background: rgba(0, 0, 0, 0.7);
  transition: opacity 500ms;
  visibility: hidden;
  opacity: 0;
  z-index: 1000000;
}

.overlay:target {
  visibility: visible;
  opacity: 1;
}

.popup {
  margin: 100px auto;
  padding: 20px;
  background: #fff;
  border-radius: 5px;
  width: 40%;
  position: relative;
  transition: all 3s ease-in-out;  
}

.popup h4 {
  margin-top: 0;
  color: #02305d;
}

.popup .close {
  position: absolute;
  top: 0px;
  right: 10px;
  transition: all 200ms;
  font-size: 35px;
  font-weight: bold;
  text-decoration: none;
  color: #333;
}

.popup .close:hover {
  color: #f53;
}

.popup .content {
  max-height: 100%;
  overflow-y: auto;
}

@media screen and (max-width: 700px) {
  .box {
    width: 70%;
  }

  .popup {
    width: 70%;
  }
}
/*.box {
  width: 40%;
  margin: 0 auto;
  background: rgba(255, 255, 255, 0.3);
  padding: 35px;
  border: 2px solid #fff;
  border-radius: 20px/50px;
  background-clip: padding-box;
  text-align: center;
}

.button {
  font-size: 1em;
  padding: 10px;
  color: #fff;
  border: 2px solid #f53;
  border-radius: 20px/50px;
  text-decoration: none;
  cursor: pointer;
  transition: all 0.3s ease-out;
}

.button:hover {
  background: #f53;
}


.overlay {
  position: fixed;
  top: 0;
  bottom: 0;
  left: 0;
  right: 0;
  background: rgba(0, 0, 0, 0.7);
  transition: opacity 500ms;
  visibility: hidden;
  opacity: 0;
  z-index: 1000000;
}

.overlay:target {
  visibility: visible;
  opacity: 1;
}
*/

@media screen and (max-width: 700px) {
  .box {
    width: 70%;
  }

  
  .popup {
    width: 70%;
  }
}