.box {
  /*width: 20px;
  margin: 0 auto;
  background: #f00;
  padding: 0px;
  border: 0px solid #fff;
  border-radius: 20px/20px;
  background-clip: padding-box;
  text-align: center;*/
}

.button {
  font-size: 1em;
  padding: 3px;
  /*color: #fff;*/
  border: 1px solid #333;
  background-color:#e4e4e4;
  border-radius: 20px/20px;
  text-decoration: none;
  cursor: pointer;
  transition: all 0.3s ease-out;
}
.button:hover {
  /*background: #06D85F;*/
}

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

.popup {
  margin: 150px auto;
  padding: 10px;
  background: #fff;
  border-radius: 5px;
  width: 30%;
  position: relative;
  transition: all 5s ease-in-out;
}

.popup h2 {
  margin-top: 0;
  color: #333;
  font-family: Tahoma, Arial, sans-serif;
  font-size:30px
}
.popup .close {
  position: absolute;
  top:0px;
  right: 5px;
  transition: all 200ms;
  font-size: 45px;
  font-weight: bold;
  text-decoration: none;
  color: #010101;
}
.popup .close:hover {
  color: #808080;
}
.popup .content {
  max-height: 40%;
  overflow: auto;
  font-size:24px
}

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