.modal_2 {
  background: dodgerblue;
  height: 1px;
  overflow: hidden;
  position: fixed;
  top: 50%;
  left: 50%;
  -webkit-transform: translate(-50%, -50%);
          transform: translate(-50%, -50%);
  -webkit-transition: width 0.5s ease 0.5s,  height 0.5s ease;
  transition: width 0.5s ease 0.5s,  height 0.5s ease;
  width: 0;
}

.content_modal {
  color: transparent;
  font-family: 'Tahoma', arial, sans-serif;
  font-size: 4.8vw;
  line-height: 6.8vw;
  position: absolute;
  top: 50%;
  text-align: center;
  -webkit-transform: translate3d(0, -50%, 0);
          transform: translate3d(0, -50%, 0);
  -webkit-transition: color 0.5s ease;
  transition: color 0.5s ease;
  width: 100%;
}

label {
  color: dodgerblue;
  cursor: pointer;
  font-family: 'Tahoma', arial, sans-serif;
  font-size: 3em;
  position: fixed;
  left: 50%;
  top: 50%;
  text-transform: uppercase;
  -webkit-transform: translate(-50%, -50%);
          transform: translate(-50%, -50%);
  -webkit-transition: color 0.5s ease 0.5s;
  transition: color 0.5s ease 0.5s;
}

input {
  cursor: pointer;
  height: 0;
  opacity: 0;
  width: 0;
}
input:focus {
  outline: none;
}

input:checked {
  height: 40px;
  opacity: 1;
  position: fixed;
  right: 16.5%;
  top: 20px;
  z-index: 3;
  -webkit-appearance: none;
  width: 40px;
   border:1px solid #021a40;
   background-color:#ff0;
   border: 10px solid orange;
        -webkit-box-sizing: border-box;
        -moz-box-sizing: border-box;
        box-sizing: border-box;
        -moz-border-radius: 10px;
        border-radius: 24px;
        -moz-box-shadow: 10px 10px 10px #888;
        -webkit-box-shadow: 10px 10px 10px #888;
        box-shadow: 8px 8px 8px red,
                 -8px 8px 8px green,
                  8px -8px 8px blue,
               -8px -8px 8px yellow;
}
input:checked::after, input:checked:before {
  border-top: 1px solid #FFF;
  content: '';
  display: block;
  position: absolute;
  top: 50%;
  -webkit-transform: rotate(45deg);
          transform: rotate(45deg);
  width: 100%;
}
input:checked::after {
  -webkit-transform: rotate(-45deg);
          transform: rotate(-45deg);
}

input:checked + label {
  color: #FFF;
  -webkit-transition: color 0.5s ease;
  transition: color 0.5s ease;
}

input:checked ~ .modal_2 {
  height: 100%;
  width: 100%;
  -webkit-transition: width 0.5s ease,  height 0.5s ease 0.5s;
  transition: width 0.5s ease,  height 0.5s ease 0.5s;
}
input:checked ~ .modal_2 .content_modal {
  color: #FFF;
  -webkit-transition: color 0.5s ease 0.5s;
  transition: color 0.5s ease 0.5s;
}