upload.css

body {
  margin: 0;
  top:50%;
  background-color: #FFFFFF;
  overflow: hidden;
}



nav {
  position: relative;
  top: 5%;
  right: 0;
  left: 0;
  width: 319px;
  display: flex;
  margin: 0 auto;
  transform: translateY(-50%);
}

@media screen and (max-width: 768px) {
  nav {
    position: relative;
    left: 0;
    right: 0;
    width: 25%;
    padding: 10% 87% 9% 1%;
    display: table-cell;
    flex-direction: row;
    font-size: 18px;
  }
}

nav a {
  position: relative;
  width: 33.333%;
  display: table-cell;
  text-align: center;
  color: #949494;
  text-decoration: none;
  font-family: Verdana, Geneva, Tahoma, sans-serif;
  font-weight: bold;
  padding: 10px 20px;
  transition: 0.2s ease color;
}

nav a:before,
nav a:after {
  content: "";
  position: absolute;
  border-radius: 50%;
  transform: scale(0);
  transition: 0.2s ease transform;
}

nav a:before {
  top: 0;
  left: 10px;
  width: 6px;
  height: 6px;
}

nav a:after {
  top: 5px;
  left: 18px;
  width: 4px;
  height: 4px;
}

nav a:nth-child(1):before {
  background-color: yellow;
}

nav a:nth-child(1):after {
  background-color: red;
}

nav a:nth-child(2):before {
  background-color: #00e2ff;
}

nav a:nth-child(2):after {
  background-color: #89ff00;
}

nav a:nth-child(3):before {
  background-color: purple;
}

nav a:nth-child(3):after {
  background-color: palevioletred;
}


nav a:nth-child(4):before {
  background-color: darkgreen;
}


nav a:nth-child(4):after {
  background-color: lightgreen;
}


nav a:nth-child(5):before {
  background-color: darkblue;
}


nav a:nth-child(5):after {
  background-color: lightblue;
}

#indicator {
  position: absolute;
  left: 5%;
  bottom: 0;
  width: 30px;
  height: 3px;
  /* background-color: #fff; */
  border-radius: 5px;
  transition: 0.2s ease left;
}

nav a:hover {
  /* color: #fff; */
}

nav a:hover:before,
nav a:hover:after {
  transform: scale(1);
}

nav a:nth-child(1):hover ~ #indicator {
  background: linear-gradient(130deg, yellow, red);
}

nav a:nth-child(2):hover ~ #indicator {
  left: 28%;
  background: linear-gradient(130deg, #00e2ff, #89ff00);
}

nav a:nth-child(3):hover ~ #indicator {
  left: 49%;
  background: linear-gradient(130deg, purple, palevioletred);
}

nav a:nth-child(4):hover ~ #indicator {
  left: 70%;
  background: linear-gradient(130deg, green, yellow);
}

nav a:nth-child(5):hover ~ #indicator {
  left: 89%;
  background: linear-gradient(130deg, darkblue, lightblue);
}

input[type="file"] {
  outline: none;
  padding: 4px;
  margin: -4px;
}

input[type="file"]:focus-within::file-selector-button,
input[type="file"]:focus::file-selector-button {
  outline: 2px solid #0964b0;
  outline-offset: 2px;
}

input[type="file"]::before {
  top: 16px;
}

input[type="file"]::after {
  top: 14px;
}


input[type="file"] {
  position: relative;
}

input[type="file"]::file-selector-button {
  width: 136px;
  color: transparent;
}

input[type="file"]::before {
  position: absolute;
  pointer-events: none;
  /* top: 11px; */
  left: 40px;
  top: 13px;
  color: #0964b0;
  content: "Upload File";
}

input[type="file"]::after {
  position: absolute;
  pointer-events: none;
  /*   top: 10px; */
  left: 16px;
  height: 20px;
  width: 20px;
  content: "";
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='%230964B0'%3E%3Cpath d='M18 15v3H6v-3H4v3c0 1.1.9 2 2 2h12c1.1 0 2-.9 2-2v-3h-2zM7 9l1.41 1.41L11 7.83V16h2V7.83l2.59 2.58L17 9l-5-5-5 5z'/%3E%3C/svg%3E");
}

input[type="file"]::file-selector-button {
  border-radius: 4px;
  padding: 0 16px;
  height: 40px;
  cursor: pointer;
  background-color: white;
  border: 1px solid rgba(0, 0, 0, 0.16);
  box-shadow: 0px 1px 0px rgba(0, 0, 0, 0.05);
  margin-right: 16px;
  transition: background-color 200ms;
}

input[type="file"]::file-selector-button:hover {
  background-color: #f3f4f6;
}

input[type="file"]::file-selector-button:active {
  background-color: #e5e7eb;
}