style.css

.form__group {
    position: relative;
    padding: 15px 0 0;
    margin-top: 10px;
    width: 50%;
}
.form__field {
    font-family: inherit;
    width: 100%;
    border: 0;
    border-bottom: 2px solid #9b9b9b;
    outline: 0;
    font-size: 1.3rem;
    color: #fff;
    padding: 7px 0;
    background: transparent;
    transition: border-color 0.2s;
}
.form__field::placeholder {
    color: transparent;
}
.form__field:placeholder-shown ~ .form__label {
    font-size: 1.3rem;
    cursor: text;
    top: 20px;
}
.form__label {
    position: absolute;
    top: 0;
    display: block;
    transition: 0.2s;
    font-size: 1rem;
    color: #9b9b9b;
}
.form__field:focus {
    padding-bottom: 6px;
    font-weight: 700;
    border-width: 3px;
    border-image: linear-gradient(to right, #11998e, #38ef7d);
    border-image-slice: 1;
}
.form__field:focus ~ .form__label {
    position: absolute;
    top: 0;
    display: block;
    transition: 0.2s;
    font-size: 1rem;
    color: #11998e;
    font-weight: 700;
}
/* reset input */
.form__field:required,
.form__field:invalid {
    box-shadow: none;
}
/* demo */
body {
    font-family: "Poppins", sans-serif;
    display: flex;
    flex-direction: column;
    justify-content: space-evenly;
    align-items: center;
    min-height: 97vh;
    font-size: 1.5rem;
    background-color: #222;
}

.no-internet{
    color: #444;
    font-size: .6em;
    letter-spacing: .06em;
    text-align: center;
    margin: 0 10px;
    margin-top: 30px;
}

.sk-chase {
  width: 40px;
  height: 40px;
  position: relative;
  animation: sk-chase 2.5s infinite linear both;
}

.sk-chase-dot {
  width: 100%;
  height: 100%;
  position: absolute;
  left: 0;
  top: 0;
  animation: sk-chase-dot 2.0s infinite ease-in-out both;
}

.sk-chase-dot:before {
  content: '';
  display: block;
  width: 25%;
  height: 25%;
  background-color: #fff;
  border-radius: 100%;
  animation: sk-chase-dot-before 2.0s infinite ease-in-out both;
}

.sk-chase-dot:nth-child(1) { animation-delay: -1.1s; }
.sk-chase-dot:nth-child(2) { animation-delay: -1.0s; }
.sk-chase-dot:nth-child(3) { animation-delay: -0.9s; }
.sk-chase-dot:nth-child(4) { animation-delay: -0.8s; }
.sk-chase-dot:nth-child(5) { animation-delay: -0.7s; }
.sk-chase-dot:nth-child(6) { animation-delay: -0.6s; }
.sk-chase-dot:nth-child(1):before { animation-delay: -1.1s; }
.sk-chase-dot:nth-child(2):before { animation-delay: -1.0s; }
.sk-chase-dot:nth-child(3):before { animation-delay: -0.9s; }
.sk-chase-dot:nth-child(4):before { animation-delay: -0.8s; }
.sk-chase-dot:nth-child(5):before { animation-delay: -0.7s; }
.sk-chase-dot:nth-child(6):before { animation-delay: -0.6s; }

@keyframes sk-chase {
  100% { transform: rotate(360deg); }
}

@keyframes sk-chase-dot {
  80%, 100% { transform: rotate(360deg); }
}

@keyframes sk-chase-dot-before {
  50% {
    transform: scale(0.4);
  } 100%, 0% {
    transform: scale(1.0);
  }
}

.heading {
    display: none;
}

/* Arrow */

.arrow-up {
    transform: rotate(90deg) translateX(-105%) scale(0.9);
    height: 40px;
    width: 40px;
    display: block;
    border: 2px solid transparent;
    position: absolute;
    cursor: pointer;
    transition: all 0.5s cubic-bezier(0.25, 1.7, 0.35, 1.5);
    overflow: hidden;
    right: -50px;
}
.arrow-slide {
    left: 0;
    top: -100%;
    width: 100%;
    height: 100%;
    background: #666;
    position: absolute;
    display: block;
    z-index: 0;
}
.left-arm {
    position: absolute;
    z-index: 1;
    background-color: transparent;
    top: 19px;
    left: 3.2px;
    width: 20px;
    display: block;
    transform: rotate(-45deg);
}
.left-arm:after {
    content: "";
    background-color: #9b9b9b;
    width: 20px;
    height: 1.8px;
    display: block;
    border-radius: 1px;
    transition: all 0.5s cubic-bezier(0.25, 1.7, 0.35, 1.5);
    transform-origin: right center;
    z-index: -1;
}
.right-arm {
    position: absolute;
    z-index: 1;
    background-color: transparent;
    top: 19px;
    left: 17px;
    width: 20px;
    display: block;
    transform: rotate(45deg);
    border-radius: 2px;
}
.right-arm:after {
    content: "";
    background-color: #9b9b9b;
    width: 20px;
    height: 1.8px;
    display: block;
    border-radius: 1px;
    transition: all 0.5s cubic-bezier(0.25, 1.7, 0.35, 1.5);
    transform-origin: left center;
    z-index: -1;
}
.arrow-up:hover {
    transition: all 0.1s;
    border: 2px solid #9b9b9b;
}
.arrow-up:hover .left-arm:after {
    transform: rotate(-10deg);
}
.arrow-up:hover .right-arm:after {
    transform: rotate(10deg);
}
.arrow-up:hover .arrow-slide {
    transition: all 0.4s ease-in-out;
    transform: translateY(200%);
}

/* arrow */

dl {
    display: flex;
    flex-direction: column;
    width: 84vw;
    max-width: 900px;
    position: relative;
    padding: 20px;
    margin: 0;
    color: #aaa;
}
dt {
    align-self: flex-start;
    width: 100%;
    text-align: center;
    font-size: 1.2em;
    font-weight: 700;
    margin: 20px auto;
}
.text {
    font-weight: 600;
    display: flex;
    align-items: center;
    height: 40px;
    width: 200px;
    position: absolute;
    left: -9px;
    justify-content: flex-end;
}
.percentage {
    font-size: 0.8em;
    line-height: 1;
    text-transform: uppercase;
    height: 40px;
    margin-left: 180px;
    background: repeating-linear-gradient(to right,#666,#666 1px,#333 1px,#333 10%);
    padding: 6px 0;
    border-left: #ddd 9px solid;
    border-right: #ddd 9px solid;
}
.percentage:after {
    content: "";
    display: block;
    background-color: #3d9970;
    width: 50%;
    margin-bottom: 10px;
    height: 90%;
    position: relative;
    top: 50%;
    transform: translateY(-50%);
    transition: background-color 0.3s ease,width 0.2s ease-in-out;
    cursor: pointer;
}

.percentage:nth-child(2):after {
    background-color: #003f5c;
}
.percentage:nth-child(3):after {
    background-color: #2f4b7c;
}
.percentage:nth-child(4):after {
    background-color: #a05195;
}
.percentage:nth-child(5):after {
    background-color: #d45087;
}
.percentage:nth-child(6):after {
    background-color: #f95d6a;
}
.percentage:nth-child(7):after {
    background-color: #ff7c43;
}
.percentage:nth-child(8):after {
    background-color: #ffa600;
}

.percentage:hover:after,
.percentage:focus:after {
    background-color: #aaa;
}

 .percentage-0:after {
     width: 0.5%;
}

 .percentage-1:after {
     width: 1%;
}
 .percentage-2:after {
     width: 2%;
}
 .percentage-3:after {
     width: 3%;
}
 .percentage-4:after {
     width: 4%;
}
 .percentage-5:after {
     width: 5%;
}
 .percentage-6:after {
     width: 6%;
}
 .percentage-7:after {
     width: 7%;
}
 .percentage-8:after {
     width: 8%;
}
 .percentage-9:after {
     width: 9%;
}
 .percentage-10:after {
     width: 10%;
}
 .percentage-11:after {
     width: 11%;
}
 .percentage-12:after {
     width: 12%;
}
 .percentage-13:after {
     width: 13%;
}
 .percentage-14:after {
     width: 14%;
}
 .percentage-15:after {
     width: 15%;
}
 .percentage-16:after {
     width: 16%;
}
 .percentage-17:after {
     width: 17%;
}
 .percentage-18:after {
     width: 18%;
}
 .percentage-19:after {
     width: 19%;
}
 .percentage-20:after {
     width: 20%;
}
 .percentage-21:after {
     width: 21%;
}
 .percentage-22:after {
     width: 22%;
}
 .percentage-23:after {
     width: 23%;
}
 .percentage-24:after {
     width: 24%;
}
 .percentage-25:after {
     width: 25%;
}
 .percentage-26:after {
     width: 26%;
}
 .percentage-27:after {
     width: 27%;
}
 .percentage-28:after {
     width: 28%;
}
 .percentage-29:after {
     width: 29%;
}
 .percentage-30:after {
     width: 30%;
}
 .percentage-31:after {
     width: 31%;
}
 .percentage-32:after {
     width: 32%;
}
 .percentage-33:after {
     width: 33%;
}
 .percentage-34:after {
     width: 34%;
}
 .percentage-35:after {
     width: 35%;
}
 .percentage-36:after {
     width: 36%;
}
 .percentage-37:after {
     width: 37%;
}
 .percentage-38:after {
     width: 38%;
}
 .percentage-39:after {
     width: 39%;
}
 .percentage-40:after {
     width: 40%;
}
 .percentage-41:after {
     width: 41%;
}
 .percentage-42:after {
     width: 42%;
}
 .percentage-43:after {
     width: 43%;
}
 .percentage-44:after {
     width: 44%;
}
 .percentage-45:after {
     width: 45%;
}
 .percentage-46:after {
     width: 46%;
}
 .percentage-47:after {
     width: 47%;
}
 .percentage-48:after {
     width: 48%;
}
 .percentage-49:after {
     width: 49%;
}
 .percentage-50:after {
     width: 50%;
}
 .percentage-51:after {
     width: 51%;
}
 .percentage-52:after {
     width: 52%;
}
 .percentage-53:after {
     width: 53%;
}
 .percentage-54:after {
     width: 54%;
}
 .percentage-55:after {
     width: 55%;
}
 .percentage-56:after {
     width: 56%;
}
 .percentage-57:after {
     width: 57%;
}
 .percentage-58:after {
     width: 58%;
}
 .percentage-59:after {
     width: 59%;
}
 .percentage-60:after {
     width: 60%;
}
 .percentage-61:after {
     width: 61%;
}
 .percentage-62:after {
     width: 62%;
}
 .percentage-63:after {
     width: 63%;
}
 .percentage-64:after {
     width: 64%;
}
 .percentage-65:after {
     width: 65%;
}
 .percentage-66:after {
     width: 66%;
}
 .percentage-67:after {
     width: 67%;
}
 .percentage-68:after {
     width: 68%;
}
 .percentage-69:after {
     width: 69%;
}
 .percentage-70:after {
     width: 70%;
}
 .percentage-71:after {
     width: 71%;
}
 .percentage-72:after {
     width: 72%;
}
 .percentage-73:after {
     width: 73%;
}
 .percentage-74:after {
     width: 74%;
}
 .percentage-75:after {
     width: 75%;
}
 .percentage-76:after {
     width: 76%;
}
 .percentage-77:after {
     width: 77%;
}
 .percentage-78:after {
     width: 78%;
}
 .percentage-79:after {
     width: 79%;
}
 .percentage-80:after {
     width: 80%;
}
 .percentage-81:after {
     width: 81%;
}
 .percentage-82:after {
     width: 82%;
}
 .percentage-83:after {
     width: 83%;
}
 .percentage-84:after {
     width: 84%;
}
 .percentage-85:after {
     width: 85%;
}
 .percentage-86:after {
     width: 86%;
}
 .percentage-87:after {
     width: 87%;
}
 .percentage-88:after {
     width: 88%;
}
 .percentage-89:after {
     width: 89%;
}
 .percentage-90:after {
     width: 90%;
}
 .percentage-91:after {
     width: 91%;
}
 .percentage-92:after {
     width: 92%;
}
 .percentage-93:after {
     width: 93%;
}
 .percentage-94:after {
     width: 94%;
}
 .percentage-95:after {
     width: 95%;
}
 .percentage-96:after {
     width: 96%;
}
 .percentage-97:after {
     width: 97%;
}
 .percentage-98:after {
     width: 98%;
}
 .percentage-99:after {
     width: 99%;
}
 .percentage-100:after {
     width: 100%;
}

@media only screen and (max-width: 720px) {
    .form__group {
        width: 70%;
    }
    dl {
        padding-right: 0;
    }
    .no-internet{
        margin-top: 60px;
    }
    .percentage {
        border: unset;
        border-left: #eee 7px solid;
        background: repeating-linear-gradient(to right,#666,#666 1px,#333 1px,#333 20%);
        font-size: 0.5em;
        margin-left: 90px;
    }
    .text {
        width: unset;
    }
}

@media only screen and (max-width: 420px) {
    body {
        justify-content: space-around;
        margin-bottom: 300px;
    }
    dt {
        display: none;
    }
    .heading {
        display: unset;
        color: #aaa;
        margin: 50px 0;
        margin-bottom: 180px;
        text-align: center;
        font-size: 1.2em;
        font-weight: 700;
    }
    .no-internet{
        position: absolute;
        bottom: -300px;
    }
    dl {
        padding: 0;
        width: 78vh;
        transform: rotate(-90deg);
    }
    .percentage {
        margin-left: 120px;
        padding: 4px 0;
        background: repeating-linear-gradient(to right,#666,#666 1px,#333 1px,#333 10%);
        height: 30px;
    }
    .text {
        left: -27px;
    }
}

@media only screen and (max-width: 340px) {
    body {
        margin-bottom: 270px;
    }
    .percentage {
        padding: 1px 0;
    }
    .heading {
        margin-bottom: 150px;
    }
    .no-internet{
        bottom: -270px;
    }
}