.box {
  max-width: 360px;
  min-width: 360px;
  margin: 0 auto;
  background: rgba(255,255,255,0.2);
  padding-top: 35px;
  padding-bottom: 35px;
  border: 2px solid #fff;
  border-radius: 20px/50px;
  background-clip: padding-box;
  text-align: center;
}

.button_entra {
  font-size: 1.2em;
  padding: 10px;
  white-space: nowrap;
  border: 2px solid #85b0be;
  border-radius: 20px/50px;
  text-decoration: none;
  cursor: pointer;
  transition: all 0.3s ease-out;
}
.button_entra:hover {
  background: #85b0be;
}

.overlay {
  position: fixed;
  margin-top: 5px;
  top: 0;
  bottom: 0;
  left: 0;
  right: 0;
  background: rgba(0, 0, 0, 0.7);
  transition: opacity 500ms;
  visibility: hidden;
  opacity: 0;
  z-index: 1;
}
.overlay:target {
  visibility: visible;
  opacity: 1;
}

.popup {
  margin: 70px auto;
  padding: 0px;
  padding-top: 30px;
  background: none;
  border-radius: 5px;
  width: 100%;
  max-width: 1024px;
  position: relative;
  transition: all 0.3s ease-in-out;
}

.popup .close {
  position: absolute;
  top: 0;
  right: 10px;
  transition: all 200ms;
  font-size: 30px;
  font-weight: bold;
  text-decoration: none;
  color: white;
  opacity: 1;
}
.popup .close:hover {
  color: #17a2b8;
}
.popup .content {
  max-height: 30%;
  overflow: auto;
}