form,
span {
  box-sizing: border-box;
}

form {
  font-family: 'roboto', sans-serif;
  max-width: 800px;
  width: 95%;
  background-color: #f2f6fb;
  margin: 100px auto 0;
  box-shadow: 2px 2px 5px 1px rgba(0, 0, 0, 0.2);
  padding: 0 0 40px;
  border-radius: 3px;
  color: #555;
  text-align: center;
  overflow: hidden;
}
input {
  text-align: center;
}
input::-webkit-input-placeholder,
textarea::-webkit-input-placeholder {
  font: inherit;
  transition: transform 0.3s ease-in-out, font-size 0.3s ease-in-out,
    visibility 0.3s ease-in-out;
}
input,
textarea,
select {
  font: inherit;
  font-size: 0.8em;
  margin: 28px 2% 10px;
  width: 95%;
  display: block;
  border: none;
  padding: 20px 0 10px;
  border-bottom: solid 2px #ffb332;
  background: linear-gradient(
    to bottom,
    rgba(255, 255, 255, 0) 94%,
    #ffb332 4%
  );

  background-size: 0% 100%;
  background-repeat: no-repeat;
  transition: background 0.3s cubic-bezier(0.64, 0.09, 0.08, 1);
  resize: none;
  overflow: hidden;
}
input:focus::-webkit-input-placeholder,
textarea:focus::-webkit-input-placeholder,
select:focus::-webkit-input-placeholder {
  color: #ffb332;
}

input:focus::-webkit-input-placeholder,
textarea:focus::-webkit-input-placeholder,
input:valid::-webkit-input-placeholder,
textarea:valid::-webkit-input-placeholder,
select:valid::-webkit-input-placeholder {
  font-size: 0.8em;
  transform: translateY(-20px);
  visibility: visible !important;
  opacity: 1;
}
input[type='email'] {
  background: linear-gradient(
    to bottom,
    rgba(255, 255, 255, 0) 96%,
    #ffb332 4%
  );
  background-position: -800px 0;
  background-repeat: no-repeat;
  transition: border-bottom 0.3s ease, background 0.3s ease;
}
input[type='email'] ~ span.validation-text {
  position: absolute;
  visibility: hidden;
  font-family: 'roboto', sans-serif;
  font-size: 0.6em;
  width: 95%;
  margin-left: 2%;
  margin-top: -5px;
  color: white;
  transition: color 0.3s ease-in-out;
}
input[type='email']:not([value=''])::-webkit-input-placeholder {
  font-size: 0.8em;
  transform: translateY(-20px);
  visibility: visible !important;
  opacity: 1;
}
input[type='email']:not([value='']):focus::-webkit-input-placeholder {
  color: #03a9f4;
}
input[type='email']:not([value='']):focus:not(:valid)::-webkit-input-placeholder {
  color: #e91e63;
}
input[type='email']:focus {
  background-position: 0 0;
}
input[type='email']:focus:not(:valid):not([value='']) {
  border-bottom: solid 1px #e91e63;
  background: linear-gradient(
    to bottom,
    rgba(255, 255, 255, 0) 96%,
    #e91e63 4%
  );
}
input[type='email']:not(:focus):not(:valid):not([value='']) {
  border-bottom: solid 1px #e91e63;
  background-position: 0 0;
  background: linear-gradient(
    to bottom,
    rgba(255, 255, 255, 0) 96%,
    #e91e63 4%
  );
}
input[type='email']:not(:focus):not(:valid):not([value=''])::-webkit-input-placeholder {
  color: #e91e63;
}
input[type='email']:not(:focus):not(:valid):not([value=''])
  ~ span.validation-text {
  visibility: visible;
  color: #e91e63;
}
input:focus,
textarea:focus,
input:valid,
textarea:valid {
  box-shadow: none;
  outline: none;
  background-position: 0 0;
  background-size: 100% 100%;
}
.flex {
  display: flex;
  align-items: stretch;
  width: 95%;
}
.flex textarea {
  line-height: 120%;
}
form button {
  font-family: 'roboto', sans-serif;
  transition: transform 0.2s cubic-bezier(0.64, 0.09, 0.08, 1),
    box-shadow 0.2s cubic-bezier(0.64, 0.09, 0.08, 1);
  border: none;
  background: #ffb332;
  cursor: pointer;
  border-radius: 3px;
  padding: 6px;
  width: 150px;
  color: white;
  margin: 30px 0 0 25px;
  box-shadow: 0 3px 6px 0 rgba(0, 0, 0, 0.2);
}
form button:hover {
  transform: translateY(-2px);
  box-shadow: 0 5px 6px 0 rgba(0, 0, 0, 0.2);
}
/*a {
    display: inline-block;
    width: 100%;
    margin-top: 50px;
    text-align: center;
    font-family: 'roboto', sans-serif;
    text-decoration: none;
    color: $base;
    i {
        margin-right: 5px;
   }
}
*/

form a i {
  margin-right: 20px;
  transition: margin-right 0.2s cubic-bezier(0.64, 0.09, 0.08, 1);
}
/*form a:hover {
    width: 134px;
    transform: translateX(-50px);
}*/
form a:hover i {
  margin-right: 10px;
}