csss style file input code example

Example 1: input type file custom css

.custom-file-input::-webkit-file-upload-button {
  visibility: hidden;
}
.custom-file-input::before {
  content: 'Select some files';
  display: inline-block;
  background: linear-gradient(top, #f9f9f9, #e3e3e3);
  border: 1px solid #999;
  border-radius: 3px;
  padding: 5px 8px;
  outline: none;
  white-space: nowrap;
  -webkit-user-select: none;
  cursor: pointer;
  text-shadow: 1px 1px #fff;
  font-weight: 700;
  font-size: 10pt;
}
.custom-file-input:hover::before {
  border-color: black;
}
.custom-file-input:active::before {
  background: -webkit-linear-gradient(top, #e3e3e3, #f9f9f9);
}

Example 2: custom input file button

<input id="file-upload" class="p-0" required name="photo" type="file" accept="image/jpeg, image/png, application/pdf" />

::-webkit-file-upload-button {
    background: #FF4B2B;
    color: white;
    padding: 8px 25px;
    font-size: 10px;
    border-radius: 20px;
    box-shadow: 0 4px 6px rgba(50, 50, 93, 0.11), 0 1px 3px rgba(0, 0, 0, 0.08);
    border-color: #FF4B2B;
    transition: all 0.15s ease;
    letter-spacing: 1px;
    box-sizing: border-box;
    outline: none;
    cursor: pointer;
    line-height: 1.5;
    display: inline-block;
    font-weight: bold;
    text-align: center;
    white-space: nowrap;
    vertical-align: middle;
    user-select: none;
    border: 1px solid transparent;
}