CodePen Embed - A bit of neumorphism

<html>
  <head>
  </head>
  <body class="py-5">
    <div class="container">
      <button type="button" class="my-5 btn neumorphic-btn">Button</button>
      <div class="text-center">
        <div class="neumorphic-progress">
          <div class="neumorphic-progress__back"></div>
          <div class="neumorphic-progress__line"></div>
        </div>
        <div class="neumorphic-slider" onselectstart="return false" style="margin-top: 100px;">
          <div class="neumorphic-slider__back"></div>
          <div class="neumorphic-slider__line"></div>
          <div class="neumorphic-slider__thumb"></div>
          <div class="neumorphic-slider__popover">40%</div>
        </div>
      </div>
      <div class="my-5 row justify-content-center">
        <button type="button" class="btn neumorphic-btn neumorphic-checkbox"></button>
        <label class="neumorphic-text">Do you have Tripophobia?</label>
      </div>
      <div class="mt-5 row justify-content-center">
        <button type="button" class="btn neumorphic-btn neumorphic-checkbox"></button>
        <button type="button" class="btn neumorphic-btn neumorphic-checkbox"></button>
        <button type="button" class="btn neumorphic-btn neumorphic-checkbox"></button>
        <button type="button" class="btn neumorphic-btn neumorphic-checkbox"></button>
        <button type="button" class="btn neumorphic-btn neumorphic-checkbox"></button>
        <button type="button" class="btn neumorphic-btn neumorphic-checkbox"></button>
        <button type="button" class="btn neumorphic-btn neumorphic-checkbox"></button>
        <button type="button" class="btn neumorphic-btn neumorphic-checkbox"></button>
        <button type="button" class="btn neumorphic-btn neumorphic-checkbox"></button>
        <button type="button" class="btn neumorphic-btn neumorphic-checkbox"></button>
        <button type="button" class="btn neumorphic-btn neumorphic-checkbox"></button>
        <button type="button" class="btn neumorphic-btn neumorphic-checkbox"></button>
      </div>
      <div class="mt-2 row justify-content-center">
        <button type="button" class="btn neumorphic-btn neumorphic-checkbox"></button>
        <button type="button" class="btn neumorphic-btn neumorphic-checkbox"></button>
        <button type="button" class="btn neumorphic-btn neumorphic-checkbox"></button>
        <button type="button" class="btn neumorphic-btn neumorphic-checkbox"></button>
        <button type="button" class="btn neumorphic-btn neumorphic-checkbox"></button>
        <button type="button" class="btn neumorphic-btn neumorphic-checkbox"></button>
        <button type="button" class="btn neumorphic-btn neumorphic-checkbox"></button>
        <button type="button" class="btn neumorphic-btn neumorphic-checkbox"></button>
        <button type="button" class="btn neumorphic-btn neumorphic-checkbox"></button>
        <button type="button" class="btn neumorphic-btn neumorphic-checkbox"></button>
        <button type="button" class="btn neumorphic-btn neumorphic-checkbox"></button>
        <button type="button" class="btn neumorphic-btn neumorphic-checkbox"></button>
      </div>
      <div class="mt-2 row justify-content-center">
        <button type="button" class="btn neumorphic-btn neumorphic-checkbox"></button>
        <button type="button" class="btn neumorphic-btn neumorphic-checkbox"></button>
        <button type="button" class="btn neumorphic-btn neumorphic-checkbox"></button>
        <button type="button" class="btn neumorphic-btn neumorphic-checkbox"></button>
        <button type="button" class="btn neumorphic-btn neumorphic-checkbox"></button>
        <button type="button" class="btn neumorphic-btn neumorphic-checkbox"></button>
        <button type="button" class="btn neumorphic-btn neumorphic-checkbox"></button>
        <button type="button" class="btn neumorphic-btn neumorphic-checkbox"></button>
        <button type="button" class="btn neumorphic-btn neumorphic-checkbox"></button>
        <button type="button" class="btn neumorphic-btn neumorphic-checkbox"></button>
        <button type="button" class="btn neumorphic-btn neumorphic-checkbox"></button>
        <button type="button" class="btn neumorphic-btn neumorphic-checkbox"></button>
      </div>
      <div class="mt-2 row justify-content-center">
        <button type="button" class="btn neumorphic-btn neumorphic-checkbox"></button>
        <button type="button" class="btn neumorphic-btn neumorphic-checkbox"></button>
        <button type="button" class="btn neumorphic-btn neumorphic-checkbox"></button>
        <button type="button" class="btn neumorphic-btn neumorphic-checkbox"></button>
        <button type="button" class="btn neumorphic-btn neumorphic-checkbox"></button>
        <button type="button" class="btn neumorphic-btn neumorphic-checkbox"></button>
        <button type="button" class="btn neumorphic-btn neumorphic-checkbox"></button>
        <button type="button" class="btn neumorphic-btn neumorphic-checkbox"></button>
        <button type="button" class="btn neumorphic-btn neumorphic-checkbox"></button>
        <button type="button" class="btn neumorphic-btn neumorphic-checkbox"></button>
        <button type="button" class="btn neumorphic-btn neumorphic-checkbox"></button>
        <button type="button" class="btn neumorphic-btn neumorphic-checkbox"></button>
      </div>
      <div class="mt-2 row justify-content-center">
        <button type="button" class="btn neumorphic-btn neumorphic-checkbox"></button>
        <button type="button" class="btn neumorphic-btn neumorphic-checkbox"></button>
        <button type="button" class="btn neumorphic-btn neumorphic-checkbox"></button>
        <button type="button" class="btn neumorphic-btn neumorphic-checkbox"></button>
        <button type="button" class="btn neumorphic-btn neumorphic-checkbox"></button>
        <button type="button" class="btn neumorphic-btn neumorphic-checkbox"></button>
        <button type="button" class="btn neumorphic-btn neumorphic-checkbox"></button>
        <button type="button" class="btn neumorphic-btn neumorphic-checkbox"></button>
        <button type="button" class="btn neumorphic-btn neumorphic-checkbox"></button>
        <button type="button" class="btn neumorphic-btn neumorphic-checkbox"></button>
        <button type="button" class="btn neumorphic-btn neumorphic-checkbox"></button>
        <button type="button" class="btn neumorphic-btn neumorphic-checkbox"></button>
      </div>
      <div class="mt-2 row justify-content-center">
        <button type="button" class="btn neumorphic-btn neumorphic-checkbox"></button>
        <button type="button" class="btn neumorphic-btn neumorphic-checkbox"></button>
        <button type="button" class="btn neumorphic-btn neumorphic-checkbox"></button>
        <button type="button" class="btn neumorphic-btn neumorphic-checkbox"></button>
        <button type="button" class="btn neumorphic-btn neumorphic-checkbox"></button>
        <button type="button" class="btn neumorphic-btn neumorphic-checkbox"></button>
        <button type="button" class="btn neumorphic-btn neumorphic-checkbox"></button>
        <button type="button" class="btn neumorphic-btn neumorphic-checkbox"></button>
        <button type="button" class="btn neumorphic-btn neumorphic-checkbox"></button>
        <button type="button" class="btn neumorphic-btn neumorphic-checkbox"></button>
        <button type="button" class="btn neumorphic-btn neumorphic-checkbox"></button>
        <button type="button" class="btn neumorphic-btn neumorphic-checkbox"></button>
      </div>
    </div>
    <div class="container p-4">
      <div class="neumorphic-card mx-auto">
        <label class="neumorphic-label" for="login__input">Login</label>
        <input class="neumorphic-input" id="login__input" type="text" />
        <label class="neumorphic-label" for="password_input">Password</label>
        <input class="neumorphic-input" id="password_input" type="text" />
        <button type="button" class="btn neumorphic-btn mt-5 mb-3">Log in</button>
      </div>
    </div>
    <div class="container card-collection p-4">
      <div class="neumorphic-card mx-auto">
        <div class="neumorphic-card__outer">
          <image class="neumorphic-image" height="300" src="https://images.unsplash.com/photo-1562883676-8c7feb83f09b?ixlib=rb-1.2.1&ixid=eyJhcHBfaWQiOjEyMDd9&auto=format&fit=crop&w=661&q=80" /><!-- Photo by @alfonstaekema https://unsplash.com/photos/lvXeO04CxwQ -->
        </div>
        <div class="neumorphic-card__title">Barcelona</div>
        <div class="neumorphic-card__text">Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua.</div>
      </div>
      <div class="neumorphic-card mx-auto">
        <div class="neumorphic-card__outer">
          <image class="neumorphic-image" height="300" src="https://images.unsplash.com/photo-1517824488624-8d6e5cdbf991?ixlib=rb-1.2.1&ixid=eyJhcHBfaWQiOjEyMDd9&auto=format&fit=crop&w=634&q=80" /><!-- Photo by @martenbjork https://unsplash.com/photos/zr-zkaQd7f4 -->
        </div>
        <div class="neumorphic-card__title">Stockholm</div>
        <div class="neumorphic-card__text">Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua.</div>
      </div><div class="neumorphic-card mx-auto">
        <div class="neumorphic-card__outer">
          <image class="neumorphic-image" height="300" src="https://images.unsplash.com/photo-1517736996303-4eec4a66bb17?ixlib=rb-1.2.1&ixid=eyJhcHBfaWQiOjEyMDd9&auto=format&fit=crop&w=634&q=80" /><!-- Photo by @robinoode https://unsplash.com/photos/4ZtYoQavCVI -->
        </div>
        <div class="neumorphic-card__title">Amsterdam</div>
        <div class="neumorphic-card__text">Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua.</div>
      </div>
    </div>
    <div class="container">
      <div class="neumorphic-outer mx-auto p-5 neumorphic-tab-container" style="width: 600px;">
        <div class="neumorphic-tab-container__controls">
          <div class="neumorphic-tab-container__control neumorphic-tab-container__control_active" data-target="barcelona">Barcelona</div>
          <div class="neumorphic-tab-container__control" data-target="stockholm">Stockholm</div>
          <div class="neumorphic-tab-container__control" data-target="amsterdam">Amsterdam</div>
        </div>
        <div class="neumorphic-inner neumorphic-tab-container__tab neumorphic-tab-container__tab_shown" id="barcelona">
          <image class="neumorphic-image" height="300" src="https://images.unsplash.com/photo-1562883676-8c7feb83f09b?ixlib=rb-1.2.1&ixid=eyJhcHBfaWQiOjEyMDd9&auto=format&fit=crop&w=661&q=80" /><!-- Photo by @alfonstaekema https://unsplash.com/photos/lvXeO04CxwQ -->
          <div class="py-2 px-4 text-left">Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua.</div>
        </div>
        <div class="neumorphic-inner neumorphic-tab-container__tab" id="stockholm">
          <image class="neumorphic-image" height="300" src="https://images.unsplash.com/photo-1517824488624-8d6e5cdbf991?ixlib=rb-1.2.1&ixid=eyJhcHBfaWQiOjEyMDd9&auto=format&fit=crop&w=634&q=80" /><!-- Photo by @martenbjork https://unsplash.com/photos/zr-zkaQd7f4 -->
          <div class="py-2 px-4 text-left">Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua.</div>
        </div>
        <div class="neumorphic-inner neumorphic-tab-container__tab" id="amsterdam">
          <image class="neumorphic-image" height="300" src="https://images.unsplash.com/photo-1517736996303-4eec4a66bb17?ixlib=rb-1.2.1&ixid=eyJhcHBfaWQiOjEyMDd9&auto=format&fit=crop&w=634&q=80" /><!-- Photo by @robinoode https://unsplash.com/photos/4ZtYoQavCVI -->
          <div class="py-2 px-4 text-left">Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua.</div>
        </div>
      </div>
    </div>
    <div class="container py-5 card-collection">
      <div class="neumorphic-card" style="min-width: 300px;">
        <div class="neumorphic-image__wrapper">
          <image class="neumorphic-image" src="https://i.pinimg.com/originals/cb/98/4a/cb984a8d358ee8ff8355b6ab3d9dbe4b.jpg" width="100" />
        </div>
        <h4 class="neumorphic-card__title text-center">Emily Blunt</h4>
        <div class="neumorphic-card__text">British-American actress. I hope nobody minds me using picture of her, she's just pretty.</div>
      </div>
      <div class="neumorphic-card" style="min-width: 300px;">
        <div class="neumorphic-image__wrapper">
          <div class="neumorphic-image__placeholder">JD</div>
        </div>
        <h4 class="neumorphic-card__title text-center">John Doe</h4>
        <div class="neumorphic-card__text">Name instance for somebody abstract. At least you won't get charged fee for him.</div>
      </div>
    </div>
  </body>
</html>

:root {
  --value: 40%;
  --back-color: #EBECF0;
}

body {
  background-color: var(--back-color);
  text-align: center;
  justify-content: center;
}

.btn:focus {
  outline:none !important;
}

.neumorphic-btn {
  font-size: 20px;
  border: none;
  padding: 10px 40px;
  border-radius: 40px;
  color: #6D7587;
  background-color: var(--back-color);
  /*box-shadow: 3px 4px 6px 1px rgba(0, 0, 0, 0.3), 
              -2px -2px 4px 2px rgba(255, 255, 255, 1), 
              inset -14px -14px 20px -10px rgba(0, 0, 0, 0.1),
              inset 14px 14px 20px -10px rgba(255, 255, 255, 0.5) !important;  */
  box-shadow: 7px 7px 15px rgba(55, 84, 170, .15),
              -7px -7px 20px rgba(255, 255, 255, 1),
              inset 0px 0px 4px rgba(255, 255, 255, .2),
              inset 7px 7px 15px rgba(55, 84, 170, 0),
              inset -7px -7px 20px rgba(255, 255, 255, 0),
              0px 0px 4px rgba(255, 255, 255, 0) !important;
  transition: box-shadow .25s ease !important;
}

.neumorphic-btn:active {  
  box-shadow: 7px 7px 15px rgba(55, 84, 170, .15),
              -7px -7px 20px rgba(255, 255, 255, 1),
              inset 0px 0px 4px rgba(255, 255, 255, 0),
              inset 7px 7px 15px rgba(55, 84, 170, .15),
              inset -7px -7px 20px rgba(255, 255, 255, 1),
              0px 0px 4px rgba(255, 255, 255, .2) !important;
}

.neumorphic-progress, .neumorphic-slider {
  width: 260px;
  margin: auto;
}

.neumorphic-progress__back, .neumorphic-slider__back {
  height: 24px;
  background-color: var(--back-color);
  border-radius: 10px;
  border: 4px solid #f3f4f7;
  box-shadow: 7px 7px 15px rgba(55, 84, 170, .15),
              -7px -7px 20px rgba(255, 255, 255, 1),
              inset 0px 0px 4px rgba(255, 255, 255, 0),
              inset 7px 7px 15px rgba(55, 84, 170, .15),
              inset -7px -7px 20px rgba(255, 255, 255, 1),
              0px 0px 4px rgba(255, 255, 255, .2) !important;
}

.neumorphic-slider {
  width: 240px;
}

.neumorphic-slider__back {
  width: calc(100% + 20px);
  margin-left: -10px;
}

.neumorphic-progress__line {
  width: var(--value);
  height: 16px;
  background-color: #185BF1;
  margin-top: -20px;
  margin-left: 4px;
  border-radius: 8px;
  opacity: 1;
  animation: sliding 3s ease infinite;
}

@keyframes sliding {
  0% {
    width: 0;
  }
  100% {
    width: calc(100% - 8px);
  }
}

.neumorphic-slider {
  position: relative;
}

.neumorphic-slider__line {
  height: 16px;
  background-color: #185BF1;
  margin-top: -20px;
  margin-left: -6px;
  border-radius: 8px;
  opacity: 1;
  width: calc(var(--value) + 4px);
}

.neumorphic-slider__thumb {
  box-shadow: 7px 7px 15px rgba(55, 84, 170, .15), 0px 0px 15px rgba(55, 84, 170, .3);
  width: 20px;
  height: 20px;
  position: absolute;
  border-radius: 50%;
  background-color: var(--back-color);
  left: var(--value);
  top: 2px;
  margin-left: -10px;
  cursor: pointer;
}

.neumorphic-slider__popover {
  position: absolute;
  background-color: var(--back-color);
  left: var(--value);
  width: 60px;
  height: 40px;
  top: -60px;
  margin-left: -30px;
  box-shadow: 7px 7px 15px rgba(55, 84, 170, .15),
              -7px -7px 20px rgba(255, 255, 255, 1),
              0px 0px 4px rgba(255, 255, 255, .2);    
  color: #6D7587;    
  padding: 8px 0;
}

.neumorphic-slider__popover::after {
  content: '';
  position: absolute;
  width: 0;
  height: 0;
  bottom: -6px;
  left: 50%;
  margin-left: -6px;
  border-style: solid;
  border-width: 6px 6px 0 6px;
  border-color: var(--back-color) transparent transparent transparent;
}

.neumorphic-text {
  color: #a3aab9;
  margin: auto 30px;
  font-size: 22px;
}

.neumorphic-checkbox {
  padding: 20px;
  position: relative;
  margin: 0 5px;
  transition: all .25s ease;
}

.neumorphic-checkbox::after {
  content: '';
  position: absolute;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  border: 2px solid #a3aab9;
  background: transparent;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  transition: all .25s ease;
}

.neumorphic-checkbox_active {  
  box-shadow: 7px 7px 15px rgba(55, 84, 170, .15),
              -7px -7px 20px rgba(255, 255, 255, 1),
              inset 0px 0px 4px rgba(255, 255, 255, 0),
              inset 7px 7px 15px rgba(55, 84, 170, .15),
              inset -7px -7px 20px rgba(255, 255, 255, 1),
              0px 0px 4px rgba(255, 255, 255, .2) !important;
}

.neumorphic-checkbox_active::after {
  background-color: #a3aab9;
}

.neumorphic-card {
  display: block;    
  background-color: var(--back-color);
  padding: 40px;  
  box-shadow: 7px 7px 15px rgba(55, 84, 170, .15),
              -7px -7px 20px rgba(255, 255, 255, 1),
              0px 0px 4px rgba(255, 255, 255, .2) !important;
  border-radius: 30px;
  max-width: 300px;
  width: min-content;
}

.neumorphic-card__title {
  color: #555F76;
  font-size: 22px;
  padding: 20px 0 10px;
  text-align: start;
}

.neumorphic-card__text {
  padding: 0 0 10px;
  text-align: start;
  color: #8D96A8;
}

.neumorphic-card__outer {
  background-color: #f3f4f7;
  border-radius: 10px;
  border: 5px solid #f3f4f7;
  box-shadow: 7px 7px 15px rgba(55, 84, 170, .15),
              -7px -7px 20px rgba(255, 255, 255, 1),
              0px 0px 4px rgba(255, 255, 255, .2) !important;  
  margin: -5px;
}

.neumorphic-label {
  color: #868b98;
  display: block;
  text-align: start;
  margin: 25px 10px 5px;
}

.neumorphic-input {
  background-color: var(--back-color);
  border-radius: 10px;
  border: 3px solid #f3f4f7;
  box-shadow: 2px 2px 3px rgba(55, 84, 170, .15),
              inset 0px 0px 4px rgba(255, 255, 255, 0),
              inset 7px 7px 15px rgba(55, 84, 170, .15),
              inset -7px -7px 20px rgba(255, 255, 255, 1),
              0px 0px 4px rgba(255, 255, 255, .2) !important;
  padding: 5px 15px;
  outline: none !important;
  color: #535D74;
}

.neumorphic-image {
  border-radius: 10px;
}

.neumorphic-image__wrapper {
  width: 100px;
  height: 100px;
  border-radius: 50% !important;
  overflow: hidden;
  margin: 0 auto;
  border: 2px solid var(--back-color);
  box-shadow: inset 0px 0px 4px rgba(255, 255, 255, 0),
              inset 3px 3px 5px rgba(55, 84, 170, .15),
              inset -3px -3px 5px rgba(255, 255, 255, .5),
              0px 0px 4px rgba(255, 255, 255, .2) !important;
}

.neumorphic-image__placeholder {
    color: #565e74;
    font-size: 30px;
    padding: 25px 0 0 0;
}

.card-collection .neumorphic-card {
  display: inline-block;
  margin: 0 10px !important;
}

.neumorphic-outer {
  box-shadow: 7px 7px 15px rgba(55, 84, 170, .15),
              -7px -7px 20px rgba(255, 255, 255, 1),
              0px 0px 4px rgba(255, 255, 255, .2) !important;
  background-color: var(--back-color);
  border-radius: 30px;
}

.neumorphic-inner {
  box-shadow: inset 0px 0px 4px rgba(255, 255, 255, 0),
              inset 7px 7px 15px rgba(55, 84, 170, .15),
              inset -7px -7px 20px rgba(255, 255, 255, 1),
              0px 0px 4px rgba(255, 255, 255, .2) !important; 
  border-radius: 10px;
}

.neumorphic-tab-container {
  display: flex;
  flex-direction: column;
}

.neumorphic-tab-container__controls {       
  display: flex;
  border: 4px solid var(--back-color);
  width: min-content;
  background-color: var(--back-color);
  border-radius: 15px;
  margin-bottom: 15px;
}

.neumorphic-tab-container__control {
  padding: 10px 10px;
  color: #535D74;
  background-color: var(--back-color);
  box-shadow: inset 0px 0px 4px rgba(255, 255, 255, .2), inset 7px 7px 15px rgba(55, 84, 170, 0), inset -7px -7px 20px rgba(255, 255, 255, 0);
  transition: box-shadow .4s ease;
  cursor: pointer;
}

.neumorphic-tab-container__control:first-child {
    border-top-left-radius: 11px;
    border-bottom-left-radius: 11px;
}

.neumorphic-tab-container__control:last-child {
    border-top-right-radius: 11px;
    border-bottom-right-radius: 11px;
}

.neumorphic-tab-container__control_active {
  box-shadow: inset 0px 0px 4px rgba(255, 255, 255, 0), inset 7px 7px 15px rgba(55, 84, 170, .15), inset -7px -7px 20px rgba(255, 255, 255, 1);
}

.neumorphic-tab-container__tab {
  display: none;
  padding: 20px;
}

.neumorphic-tab-container__tab_shown {
  display: flex;
}

$('.neumorphic-checkbox').on('click', function(){
  $(this).toggleClass('neumorphic-checkbox_active');
});

$('.neumorphic-tab-container__control').on('click', function(){
  if ($(this).hasClass('neumorphic-tab-container__control_active')){
    return false;
  }
  $('.neumorphic-tab-container__tab_shown').removeClass('neumorphic-tab-container__tab_shown');
  $('.neumorphic-tab-container__control_active').removeClass('neumorphic-tab-container__control_active');
  $(this).addClass('neumorphic-tab-container__control_active');
  $('#'+$(this).data('target')).addClass('neumorphic-tab-container__tab_shown');
});

$('.neumorphic-slider__thumb').on('mousedown', function(){
  $(document).on('mousemove.mm', function(e){
    var new_value = 0;
    if (e.clientX < $('.neumorphic-slider').offset().left) {
      new_value = '0%';
    } else if (e.clientX > $('.neumorphic-slider').offset().left + $('.neumorphic-slider').width() - 10) {
      new_value = '100%';
    } else {
      new_value = ((e.clientX - $('.neumorphic-slider').offset().left) / ($('.neumorphic-slider').width() - 10) * 100).toFixed(0) + '%';
    }
    document.documentElement.style.setProperty('--value', new_value);
    $('.neumorphic-slider__popover').text(new_value);
  });
  $(document).on('mouseup.mu', function(){
    $(document).off('mousemove.mm');
    $('.neumorphic-slider__thumb').off('mouseup.mu');
  });
});

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External CSS

https://cdnjs.cloudflare.com/ajax/libs/twitter-bootstrap/4.1.3/css/bootstrap.min.css

External CSS

External JavaScript