nav {
  width: 100%;
  height: 3.2em;
  background-color: #3F51B5;
  position: relative;
  top: 0;
  transition-duration: 0.5s;
  transition-timing-function: swing;
  overflow: hidden;
  box-shadow: 0 2px 5px 0 rgba(0,0,0,0.3);
  z-index: 9999;
}
nav.open {
  height: 17em;
}
nav ul {
  padding-top: 2.8em;
  padding-left: 2em;
}
nav ul li {
  list-style: none;
}
nav ul li a {
  padding: 10px 0;
  display: inline-block;
  text-decoration: none;
  color: #fafafa;
}
nav ul li a:hover,
nav ul li a:focus {
  opacity:0.5;
}
.navToggle {
  position: absolute;
  width: 40px;
  height: 40px;
  top: 5px;
  left: 20px;
  transition-duration: 0.5s;
}
.navToggle .icon {
  /*transition-duration: 0.25s;*/
  position: absolute;
  width: 26px;
  height: 2px;
  top: 20px;
  left: 5px;
  background-color: white;
}
.navToggle .icon:before,
.navToggle .icon:after {
  transition-duration: 0.25s;
  position: absolute;
  width: 26px;
  height: 2px;
  background-color: white;
  content: "";
}
.navToggle .icon:before {
  top: -7px;
  left: 0;
}
.navToggle .icon:after {
  top: 7px;
  left: 0;
}
.navToggle:hover {
  cursor: pointer;
}
.navToggle:hover .icon:before {
  top: -10px;
}
.navToggle:hover .icon:after {
  top: 10px;
}
.navToggle.open {
  transition-duration: 1s;
  transform: rotate(180deg);
  -webkit-transform: rotate(180deg);
}
.navToggle.open .icon {
  transition-duration: 0.5s;
  background-color: transparent;
}
.navToggle.open .icon:before {
  transition-duration: 0.5s;
  top: 0;
  transform: rotate(45deg);
  -webkit-transform: rotate(45deg);
}
.navToggle.open .icon:after {
  transition-duration: 0.5s;
  top: 0;
  transform: rotate(-45deg);
  -webkit-transform: rotate(-45deg);
}

.navToggle-left {
  position: absolute;
  width: 40px;
  height: 40px;
  top: 5px;
  left: 20px;
  transition-duration: 0.5s;
}

.navToggle-left .menu-icon {
  /*transition-duration: 0.25s;*/
  margin: 4px 3px;
  float: left;
}

.navToggle-left .menu-icon:hover {
  transform: scale(1.25);
}

.navToggle-right {
  position: absolute;
  width: 90px;
  height: 40px;
  top: 5px;
  right: 20px;
  transition-duration: 0.5s;
}

.navToggle-right .theme-icon {
  margin: 4px 3px;
  float: left;
}

.navToggle-right .submit-icon {
  margin: 4px 3px;
  float: right;
}

.navToggle-right .theme-icon:hover, .navToggle-right .submit-icon:hover {
  cursor: pointer;
  transform: scale(1.25);
}

.nav-centered a {
  float: none;
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
}
.nav-centered img {
  float: none;
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  vertical-align: top;
  margin:0px 4px;
  filter: drop-shadow(0px 1px 1px #222);
  min-width: 80px;
  max-width: 120px;
  height: auto;
}
.navToggle.open ~ .nav-centered {
  display: none;
}
.navToggle.open ~ .navToggle-right {
  display: none;
}

.modal-box {
  display: none;
  position: absolute;
  z-index: 1000;
  width: 50%;
  background: #fafafa;
  border-bottom: 1px solid #aaa;
  border-radius: 4px;
  box-shadow: 0 3px 9px rgba(0, 0, 0, 0.5);
  border: 1px solid rgba(0, 0, 0, 0.1);
  background-clip: padding-box;
  margin: auto auto;
  font-size: 1em;
}

.modal-box header, .modal-box .modal-header {
  padding: 1.25em 1.5em;
  border-bottom: 1px solid #ddd;
}
.modal-box header h3, .modal-box header h4, .modal-box .modal-header h3, .modal-box .modal-header h4 {
  margin: 0;
}
.modal-box .modal-body {
  padding: 2em 1.5em;
}
.modal-box footer, .modal-box .modal-footer {
  padding: 1em;
  border-top: 1px solid #ddd;
  background: rgba(0, 0, 0, 0.02);
  text-align: right;
}

.modal-overlay {
  opacity: 0;
  position: absolute;
  top: 0;
  left: 0;
  z-index: 900;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.3) !important;
}

a.close {
  line-height: 1;
  font-size: 1.8em;
  position: absolute;
  right: 3%;
  text-decoration: none;
  color: #bbb;
}
a.close:hover {
  color: #222;
  -webkit-transition: color 1s ease;
  -moz-transition: color 1s ease;
  transition: color 1s ease;
}
.btn {
  font-size: 3vmin;
  padding: 0.75em 1.5em;
  background-color: #fff;
  border: 1px solid #bbb;
  color: #333;
  text-decoration: none;
  display: inline;
  border-radius: 4px;
  -webkit-transition: background-color 1s ease;
  -moz-transition: background-color 1s ease;
  transition: background-color 1s ease;
}
.dark-mode .btn {
  background-color: #232429;
  border: 1px solid #696c7b;
  color: #fafafa;
}
.btn:hover {
  background-color: #ddd;
  -webkit-transition: background-color 1s ease;
  -moz-transition: background-color 1s ease;
  transition: background-color 1s ease;
}
.dark-mode .btn:hover {
  background-color: #f2f3fb;
  color: #0f0f0f;
}

.btn-small {
  padding: 0.75em 1em;
  font-size: 0.8em;
}

.sticky {
  position: fixed;
  top: 0;
  left:0;
}

.sticky + .card {
  padding-top: 100px;
}

@media (min-width: 2560px) {
  nav {
    height: 4em;
  }
  .navToggle {
    top: 12px;
    left:24px;
  }
  .navToggle-right .submit-icon {
    margin: 12px 6px;
  }
  .modal-box {
    font-size: 1.4em;
  }
}

@media (min-width: 600px) and (max-width: 1400px) {
  .modal-box {
    width: 80%;
  }
}

@media (min-width: 320px) and (max-width: 600px) {
  .modal-box {
    width: 90%;
  }
  a.close {
    right: 5%;
  }
}