.hk-navigation {
  display: flex;
  width: 100%;
  justify-content: space-between;
  flex-wrap: wrap;
}

.hk-navigation button.btn-nav {
  width: 45px;
  height: 45px;
  padding: 3px 10px;
  color: #5c5c5c;
  background-image: none;
  border: 1px solid #8eecf5;
  border-radius: 50%;
  background-color: #8eecf5;
  box-shadow: 5px 5px 5px rgba(0, 0, 0, 0.1), -5px -5px 5px rgba(255, 255, 255, 0.6);
  transition: 0.3s;
}

.hk-navigation button[disabled] {
  border: 1px solid gray;
  background-color: gray;
  color: #dbd7d7;
  pointer-events: none;
}

.hk-navigation button[disabled] i {
  text-shadow: gray 1px 1px 0;
}

.hk-navigation button.btn-nav:hover {
  background-color: white;
}

.hk-navigation button.btn-nav:active {
  box-shadow: none;
}

.hk-navigation button i {
  text-shadow: #8eecf5 1px 1px 0;
  font-size: 18px;
}

.hk-navigation .btn-mark {
  width: 130px;
  background-image: none;
  text-shadow: none;
  height: 45px;
}

.btn-mark {
  appearance: none;
  background-color: #2ea44f;
  border: 1px solid rgba(27, 31, 35, .15);
  border-radius: 6px;
  box-shadow: rgba(27, 31, 35, .1) 0 1px 0;
  box-sizing: border-box;
  color: #fff;
  cursor: pointer;
  display: inline-block;
  font-family: -apple-system, system-ui, 'Segoe UI', Helvetica, Arial, sans-serif, 'Apple Color Emoji', 'Segoe UI Emoji';
  font-size: 14px;
  font-weight: 600;
  line-height: 20px;
  padding: 6px 16px;
  position: relative;
  text-align: center;
  text-decoration: none;
  user-select: none;
  -webkit-user-select: none;
  touch-action: manipulation;
  vertical-align: middle;
  white-space: nowrap;
}

.btn-mark:focus:not(:focus-visible):not(.focus-visible) {
  box-shadow: none;
  outline: none;
}

.btn-mark:hover {
  background-color: #2c974b;
  color: white;
}

.btn-mark.completed {
  pointer-events: none;
  background-color: white;
  color: #2ea44f;
  border-color: #2ea44f;
}

.btn-mark:focus {
  box-shadow: rgba(46, 164, 79, .4) 0 0 0 3px;
  outline: none;
}

.btn-mark:disabled {
  background-color: #94d3a2;
  border-color: rgba(27, 31, 35, .1);
  color: rgba(255, 255, 255, .8);
  cursor: default;
}

.btn-mark:active {
  background-color: #298e46;
  box-shadow: rgba(20, 70, 32, .2) 0 1px 0 inset;
}

.hk-navigation .btn-mark:hover {
  background-image: none;
}

.hk-navigation .navbar-title {
  width: calc(100% - 300px);
  text-align: center;
  font-size: 1.5em;
}

.hk-navigation .navbar-mobile-title {
  width: 100%;
  text-align: center;
  display: none;
}

@media only screen and (max-width: 767px) {
  .hk-navigation .navbar-title {
    display: none;
  }

  .hk-navigation .navbar-mobile-title {
    display: block;
  }
}

.tooltip {
  position: relative;
  display: inline-block;
  border-bottom: 1px dotted black;
}

.tooltip .tooltiptext {
  visibility: hidden;
  width: 100px;
  text-shadow: none;
  background-color: #505050;
  color: #fff;
  text-align: center;
  border-radius: 6px;
  padding: 5px 0;
  position: absolute;
  z-index: 1001;
  bottom: 145%;
  left: 67%;
  margin-left: -60px;
}

.tooltip .tooltiptext::after {
  content: '';
  position: absolute;
  top: 100%;
  left: 50%;
  margin-left: -5px;
  border-width: 5px;
  border-style: solid;
  border-color: black transparent transparent transparent;
}

.tooltip:hover .tooltiptext {
  visibility: visible;
}