@media only screen and (max-width: 600px) {
  @keyframes show {
    0% {
      height: 0%;
    }
    100% {
      height: 100%;
    }
  }
  @keyframes hide {
    0% {
      height: 100%;
    }
    100% {
      height: 0%;
    }
  }
  @keyframes slide_right {
    0% {
      width: 0%;
      right: 0%;
    }
    100% {
      width: 100%;
      right: 100%;
    }
  }
  @keyframes slide_left {
    0% {
      width: 100%;
      right: 100%;
    }
    100% {
      width: 0%;
      right: 0%;
    }
  }
  @keyframes modal_show {
    0% {
      height: 0px;
      width: 0px;
      right: 0px;
      left: 100%;
      top: 50px;
    }
    100% {
      height: 100%;
      width: 100%;
      left: 0;
    }
  }
  @keyframes modal_hide {
    0% {
      height: 100%;
      width:100%;
      left: 0%;
    }
    100% {
      height: 0%;
      width: 0%;
      left: 100%;
    }
  }
  #header {
    box-shadow: 0px 0px 10px 0px grey;
    height: 50px;
    background-color: white;
    text-align: center;
    padding-top: 2.5px;
  }
  #header_btn {
    right: 0px;
    top: 0px;
    height: 50px;
    width: 50px;
    color: darkgray;
    position: absolute;
  }
  #hamburger {
    display: inline;
  }
  #close_icon {
    display: none;
  }
  /*#header_btn_icon {
    size: 36px;
    margin: 10px 10px 0px 0px;
  }*/
  #quadrip {
    aspect-ratio: 1.29/1;
    max-height: 45px;
    width: 58px;
  }
  #menu_bar {
    height: 30px;
    border: 0px 0px 1px 0px;
    border-color: gray;
  }
  #dropdown {
    position: relative;
    display: inline-block;
  }
  #dropdown_btn {
    background-color: #A3BDBE;
    color: white;
    padding: 16px;
    /*float: left;*/
    font-size: 16px;
    border: none;
    cursor: pointer;
    position: relative;
    left: 0px;
  }
  #dropdown_content {
    display: none;
    position: absolute;
    background-color: #F1F1F1;
    min-width: 160px;
    box-shadow: 0px 8px 16px 0px rgba(0, 0, 0, 0.2);
    z-index: 1;
  }
  .showBlock {
    display: block;
  }
  .showInline {
    display: inline;
  }
  .hide {
    display: none;
  }
  .modal {
    background-color: #B0E5EB;
    border-width: 5px 0px 0px 0px;
    border-style: solid;
    border-color: grey;
    display: none;
    text-align:  center;
    position: fixed;
    z-index: 1;
    right: 0;
    top: 50px;
    width: 100%;
    height: 100%;
    overflow: auto;
    /*animation-name: slide_right;
    animation-duration: 0.6s;*/
  }
  .modal a {
    color: black;
    text-decoration: none;
  }
  #modal_btn {
    position: absolute;
    right: 15px;
    margin: 15px 15px 0px 0px;
  }
  .modal_icon {
    font-size: 200px;
  }
  #modal_title {
    font-size: 24pt;
  }
}
#header_btn:hover,
#modal_btn:hover {
  background-color: #B0E5EB;
}
.modal_link {
  padding: 10px 0px 10px 0px;
}
#modal_a {
  color: black;
  font-size: 20pt;
  text-decoration: none;
}

/* Small devices (portrait tablets and large phones, 600px and up) */
@media only screen and (min-width: 600px) {
  #header {
    box-shadow: 0px 0px 10px 0px grey;
    height: 50px;
    background-color: white;
    text-align: center;
  }
  #quadrip {
    aspect-ratio: 1.29/1;
    max-height: 45px;
    width: 58px;
  }
  #menu_bar {
    height: 30px;
    border: 0px 0px 1px 0px;
    border-color: gray;
  }
  #dropdown_btn {
    background-color: #A3BDBE;
    color: white;
    padding: 16px;
    /*float: left;*/
    font-size: 16px;
    border: none;
    cursor: pointer;
    position: relative;
    left: 0px;
  }
  #dropdown_content {
    display: none;
    position: absolute;
    background-color: #F1F1F1;
    min-width: 160px;
    box-shadow: 0px 8px 16px 0px rgba(0, 0, 0, 0.2);
    z-index: 1;
  }
  .show {
    display: block;
  }
}

/* Medium devices (landscape tablets, 768px and up) */
@media only screen and (min-width: 768px) {
  #menu_bar {
    display: none;
  }
  .modal {
    display: none;
  }
}