index.css

/* https://codepen.io/arjancodes/pen/Bahkb */

@import url(https://fonts.googleapis.com/css?family=Roboto:400,100,500,300italic,500italic,700italic,900,300);

$font: 'Roboto', sans-serif;
$green: rgba(22, 160, 133,1.0);

*,*:after,*:before {
  box-sizing: border-box;
}

*, *:before, *:after {
  -moz-box-sizing: border-box;
  -webkit-box-sizing: border-box;
  box-sizing: border-box;
}

body {
  font-family: 'Nunito', sans-serif;
  color: #384047;
}

form {
  max-width: 300px;
  margin: 10px auto;
  padding: 10px 20px;
  background: #f4f7f8;
  border-radius: 8px;
}

h1 {
  margin: 0 0 10px 0;
  text-align: center;
}
h4 {
  text-align: center;
}


input[type="text"],
input[type="password"],
input[type="date"],
input[type="datetime"],
input[type="email"],
input[type="number"],
input[type="search"],
input[type="tel"],
input[type="time"],
input[type="url"],
textarea,
select {
  background: rgba(255,255,255,0.1);
  border: none;
  font-size: 16px;
  height: auto;
  margin: 0;
  outline: 0;
  padding: 15px;
  width: 100%;
  background-color: #e8eeef;
  color: #8a97a0;
  box-shadow: 0 1px 0 rgba(0,0,0,0.03) inset;
  margin-bottom: 30px;
}

input[type="radio"],
input[type="checkbox"] {
  margin: 20px 4px 8px 0;
}

input[type="text"].custom {
  width: 75%;
  margin-right: 20px;
}

input[type="text"].value {
  width: 4em;
  padding: 1 1 1 1;
  margin: 0 4px 8px 0;
  height: 32px;
  border-radius: 2px;
  }

input[type="text"].long-value {
  width: 10em;
  padding: 1 1 1 1;
  margin: 0 4px 8px 0;
  height: 32px;
  border-radius: 2px;
  }


label.medium_label {
  vertical-align: middle;
  text-align: left/right;
  margin: 0 4px 8px 0;
  width: 200px;
}

input:disabled {
  background: #dddddd;
}

input:disabled+label {
  color: #ccc;
}

select {
  padding: 6px;
  height: 32px;
  border-radius: 2px;
}

button.real {
  padding: 19px 39px 18px 39px;
  color: #FFF;
  background-color: #4bc970;
  font-size: 18px;
  text-align: center;
  font-style: normal;
  border-radius: 5px;
  width: 100%;
  border: 1px solid #3ac162;
  border-width: 1px 1px 3px;
  box-shadow: 0 -1px 0 rgba(255,255,255,0.1) inset;
  margin-bottom: 10px;
}

fieldset {
  margin-bottom: 30px;
  border: none;
}

legend {
  font-size: 1.4em;
  margin-bottom: 10px;
}

label {
  display: inline-block;
  margin-bottom: 8px;
}

label.light {
  font-weight: 300;
  display: inline;
}

.number {
  background-color: #5fcf80;
  color: #fff;
  height: 30px;
  width: 30px;
  display: inline-block;
  font-size: 0.8em;
  margin-right: 4px;
  line-height: 30px;
  text-align: center;
  text-shadow: 0 1px 0 rgba(255,255,255,0.2);
  border-radius: 100%;
}

@media screen and (min-width: 480px) {

  form {
    max-width: 640px;
  }

}

.slider {
  -webkit-appearance: none;
  width: 100%;
  height: 15px;
  border-radius: 5px;   
  background: #d3d3d3;
  outline: none;
  opacity: 0.7;
  -webkit-transition: .2s;
  transition: opacity .2s;
}

.slider::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 25px;
  height: 25px;
  border-radius: 50%; 
  background: #4CAF50;
  cursor: pointer;
}

.slider::-moz-range-thumb {
  width: 25px;
  height: 25px;
  border-radius: 50%;
  background: #4CAF50;
  cursor: pointer;
}

/* https://codepen.io/benjaminsimier/pen/wNXOWE?page=2 */

.check {
    position: relative;
    width: 100px;
    height: 50px;
    border: solid 1px #e5e5e5;
    border-radius: 40px;
    cursor: pointer;
    transition: .2s all;
    padding: 19px 39px 18px 39px;

}

.check:focus {
    outline: 0;
}

.check:disabled {
    cursor: default;
    border-color: #f0eeee;
}

.check::before {
    content: '';
    position: absolute;
    background-color: #FFF;
    border: 0.5px solid rgba(0, 0, 0, 0.1);
    border-radius: 100%;
    left: 5px;
    right: inherit;
    top: 50%;
    transform: translateY(-50%);
    height: 40px;
    width: 40px;
    box-shadow: 0 2px 4px 0 rgba(0, 0, 0, 0.15);
}

.checkactive {
    background-color: #53d869;
    transition: .2s all;
}

.checkactive:disabled {
    background-color: #ACEEC1;
}

.checkactive::before {
    content: '';
    position: absolute;
    background-color: #FFF;
    border: 0.5px solid rgba(0, 0, 0, 0.1);
    border-radius: 100%;
    left: inherit;
    right: 5px;
    top: 50%;
    transform: translateY(-50%);
    height: 40px;
    width: 40px;
}

/* https://codepen.io/arjancodes/pen/Bahkb */


.input-container {
  position: relative;
  overflow: auto;
  padding: 1rem;
}


.addcustom {
  float: left;
  width: 100%;
  
  border: none;
  border-radius: 0.5rem;
  padding: 1rem;
  
  font-size: 1.6rem;
  font-family: 'Roboto';
  font-weight: 300;
  
  color: $green;
}

.add-icon {
  position: absolute;
  top: 38%;
  transform: translateY(-50%);
  right: 40px;
}  
.add-icon:after {
    content: '+';
    display: block;
    width: 40px;
    height: 40px;
    
    margin: 3px auto;
    
    font-size: 2rem;
    font-weight: 600;
    text-align: center;
    line-height: 35px;
    
    color: $green;
    cursor: pointer;
  }

.list {
  margin: 0;
  padding: 0 2rem 2rem;
  list-style-type: none;
  clear: both;
  
  font-size: 1rem;
}
  
.close {
    position: relative;
    margin: 1rem 0;
    padding: 0rem 0;
}
    
.close:after {
      opacity: .6;
      content: '+';
      position: absolute;
      right: 0;
      top: 50%;
      transform: translateY(-50%) rotate(45deg);

      height: 35px;
      width: 35px;

      border-radius: 50%;

      font-size: 1.4rem;
      font-weight: 600;
      text-align: center;

      color: $green;
      background: white;
      cursor: pointer;
      transition: all .2s ease-out;
}
    
.close:hover:after {
      transform: translateY(-50%) rotate(225deg);
      opacity: 1;
    }