.black {
  color: black;
}

.success {
  color: green;
}

.fail {
  color: red;
}

.progress {
  background: rgba(255,255,255,0.1);
  justify-content: flex-start;
  border-radius: 100px;
  align-items: center;
  position: relative;
  padding: 0 5px;
  display: flex;
  height: 40px;
  width: 500px;
}

.center-element {
  margin: auto;
  width: 50%;
  padding: 10px;
}

.center-text {
  text-align: center;
}

.progress-value {
  -webkit-animation: load 3s normal forwards;
          animation: load 3s normal forwards;
  box-shadow: 0 10px 40px -10px #fff;
  border-radius: 100px;
  background: #fff;
  height: 30px;
  width: 0;
}

@-webkit-keyframes load {
  0% { width: 0;
  }

  100% { width: 68%;
  }
}

@keyframes load {
  0% { width: 0;
  }

  100% { width: 68%;
  }
}

.mx-sm {
  margin: 0.5em 0.5em;
}

.very-hard {
  color: #ff4b4b;
}

.hard {
  color: #ff9c70;
}

.medium {
  color: #ffcf40;
}

.easy {
  color: #26B17D;
}

.very-easy {
  color: #4EFF1B;
}

.meter {
    box-sizing: content-box;
    height: 30px; /* Can be anything */
    position: relative;
    margin: 60px 0 20px 0; /* Just for demo spacing */
    background: #555;
    border-radius: 25px;
    padding: 10px;
    box-shadow: inset 0 -1px 1px rgba(255, 255, 255, 0.3);
  }
  .meter > span {
    display: block;
    height: 100%;
    border-top-right-radius: 8px;
    border-bottom-right-radius: 8px;
    border-top-left-radius: 20px;
    border-bottom-left-radius: 20px;
    background-color: rgb(43, 194, 83);
    background-image: linear-gradient(
      center bottom,
      rgb(43, 194, 83) 37%,
      rgb(84, 240, 84) 69%
    );
    box-shadow: inset 0 2px 9px rgba(255, 255, 255, 0.3),
      inset 0 -2px 6px rgba(0, 0, 0, 0.4);
    position: relative;
    overflow: hidden;
  }
  .meter > span:after,
  .animate > span > span {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    bottom: 0;
    right: 0;
    background-image: linear-gradient(
      -45deg,
      rgba(255, 255, 255, 0.2) 25%,
      transparent 25%,
      transparent 50%,
      rgba(255, 255, 255, 0.2) 50%,
      rgba(255, 255, 255, 0.2) 75%,
      transparent 75%,
      transparent
    );
    z-index: 1;
    background-size: 50px 50px;
    animation: move 2s linear infinite;
    border-top-right-radius: 8px;
    border-bottom-right-radius: 8px;
    border-top-left-radius: 20px;
    border-bottom-left-radius: 20px;
    overflow: hidden;
  }
  
  .animate > span:after {
    display: none;
  }
  
  @keyframes move {
    0% {
      background-position: 0 0;
    }
    100% {
      background-position: 50px 50px;
    }
  }
  
  .orange > span {
    background-image: linear-gradient(#fffefe, #dddddd);
  }
  
  .nostripes > span > span,
  .nostripes > span::after {
    background-image: none;
  }
  
  #page-wrap {
    width: 490px;
    margin: 80px auto;
  }
  body {
    background: #333;
    text-align: center;
    color: #eee;
    font-family: system-ui, sans-serif;
  }
  h1 {
    font-size: 42px;
    font-weight: 600;
    margin: 0 0 30px;
  }
  pre {
    background: #000;
    text-align: left;
    padding: 20px;
    margin: 0 auto 30px;
  }
  * {
    box-sizing: border-box;
  }

.text-dark {
    color:black;
}