* {
  box-sizing: border-box;
}

#panel h2 {
  text-align: center;
  margin-bottom: 50px;
  color: #fff;
  text-shadow: 2px 2px 4px #000000;
  text-shadow: 1px 1px 2px #000000, 0 0 2px #24ab9c;
  font-size: 45px;
  margin-top: -60px;
}

/* form starting stylings ------------------------------- */

.group {
  position: relative;
  margin-bottom: 35px;
}

input {
  color: #fff;
  font-size: 18px;
  padding: 5px 10px 10px 5px;
  display: block;
  width: 100%;
  border: none;
  border-bottom: 1px solid #fff;
  background: transparent;
}

input:focus {
  outline: none;
}

/* LABEL ======================================= */

label {
  color: #fff;
  font-size: 18px;
  font-weight: normal;
  position: absolute;
  pointer-events: none;
  left: 5px;
  top: 10px;
  transition: 0.2s ease all;
  -moz-transition: 0.2s ease all;
  -webkit-transition: 0.2s ease all;
}

/* active state */

input:focus~label, input:valid~label {
  top: -20px;
  font-size: 14px;
  color: #fff;
}

/* BOTTOM BARS ================================= */

.bar {
  position: relative;
  display: block;
  width: 100%;
}

.bar:before, .bar:after {
  content: '';
  height: 2px;
  width: 0;
  bottom: 1px;
  position: absolute;
  background: #fff;
  transition: 0.2s ease all;
  -moz-transition: 0.2s ease all;
  -webkit-transition: 0.2s ease all;
}

.bar:before {
  left: 50%;
  background: #24ab9c;
}

.bar:after {
  right: 50%;
  background: #24ab9c;
}

/* active state */

input:focus~.bar:before, input:focus~.bar:after {
  width: 50%;
}

/* HIGHLIGHTER ================================== */

.highlight {
  position: absolute;
  height: 60%;
  width: 100px;
  top: 25%;
  left: 0;
  pointer-events: none;
  opacity: 0.5;
}

/* active state */

input:focus~.highlight {
  -webkit-animation: inputHighlighter 0.3s ease;
  -moz-animation: inputHighlighter 0.3s ease;
  animation: inputHighlighter 0.3s ease;
}

/* ANIMATIONS ================ */

@-webkit-keyframes inputHighlighter {
  from {
    background: #fff;
  }
  to {
    width: 0;
    background: transparent;
  }
}

@-moz-keyframes inputHighlighter {
  from {
    background: #fff;
  }
  to {
    width: 0;
    background: transparent;
  }
}

@keyframes inputHighlighter {
  from {
    background: #7f7f7f;
  }
  to {
    width: 0;
    background: transparent;
  }
}

#panel {
  border-radius: 4px;
  top: 50px;
}

#panel button {
  border-color: #7f7f7f;
  background-color: none;
}

#panel .btn-warning:hover {
  background-color: #yellow;
}