.td_btn {
  cursor: pointer;
  display: inline-block;
  position: relative;
  color: white;
  font-family: 'Open Sans', arial, sans-serif;
  font-weight: 600;
}
.td_btn_sm {
  padding: 5px 10px;
  font-size: 12px;
  line-height: 1.5;
}
.td_btn_sm.td_round_btn {
  border-radius: 3px;
}
.td_btn_md {
  padding: 9px 12px;
  font-size: 16px;
  line-height: 20px;
}
.td_btn_md.td_round_btn {
  border-radius: 4px;
}
.td_btn_lg {
  padding: 10px 16px;
  font-size: 18px;
  line-height: 1.33;
}
.td_btn_lg.td_round_btn {
  border-radius: 6px;
}
.td_default_btn,
.td_round_btn {
  transition: background-color 0.1s ease;
  -webkit-transition: background-color 0.1s ease;
  background-color: #4db2ec;
}
.td_default_btn:hover,
.td_round_btn:hover {
  background-color: #444 !important;
}
.td_default_btn:active,
.td_round_btn:active {
  background-color: #000 !important;
}
.td_outlined_btn {
  border-width: 2px;
  border-style: solid;
  border-color: #4db2ec;
  border-radius: 4px;
  color: #4db2ec;
  background-color: transparent;
  transition: all 0.1s ease ;
  -webkit-transition: all 0.1s ease;
}
.td_outlined_btn:hover {
  background-color: #4db2ec;
  color: #fff;
}
.td_outlined_btn:active {
  background-color: #444 !important;
  border-color: #444;
}
.td_shadow_btn {
  background-color: #4db2ec;
  top: 0;
  -webkit-box-shadow: 0 4px 7px 0 rgba(0, 0, 0, 0.25);
  -moz-box-shadow: 0 4px 7px 0 rgba(0, 0, 0, 0.25);
  box-shadow: 0 4px 7px 0 rgba(0, 0, 0, 0.25);
  transition: top 0.1s ease;
  -webkit-transition: top 0.1s ease;
}
.td_shadow_btn:hover {
  top: -3px;
  -webkit-box-shadow: 0 6px 12px 0 rgba(0, 0, 0, 0.25);
  -moz-box-shadow: 0 6px 12px 0 rgba(0, 0, 0, 0.25);
  box-shadow: 0 6px 12px 0 rgba(0, 0, 0, 0.25);
}
.td_shadow_btn:active {
  background-color: #444 !important;
}
.td_3D_btn {
  background-color: #4db2ec;
  top: 0;
  transition: top 0.1s ease;
  -webkit-transition: top 0.1s ease;
}
.td_3D_btn:after {
  content: "";
  position: absolute;
  display: block;
  left: 0;
  top: 100%;
  width: 100%;
  height: 5px;
  background-color: rgba(0, 0, 0, 0.25);
  z-index: 0;
  transition: height 0.1s ease;
  -webkit-transition: height 0.1s ease;
}
.td_3D_btn:hover {
  top: 5px;
}
.td_3D_btn:hover:before {
  height: 0;
}
.td_3D_btn:hover:after {
  height: 0;
}
.td_3D_btn:active {
  background-color: #444 !important;
}