main.css

body {
  font-family: sans-serif;
  background-color: #eeeeee;
}

.upload-btn-wrapper {
  position: relative;
  overflow: hidden;
  display: inline-block;
}

.btn {
  width: 100%;
  margin: 0;
  color: #fff;
  background: #1fb264;
  border: none;
  padding: 10px;
  border-radius: 4px;
  border-bottom: 4px solid #15824b;
  transition: all 0.2s ease;
  outline: none;
  text-transform: uppercase;
  font-weight: 700;
}

.upload-btn-wrapper input[type="file"] {
  font-size: 100px;
  position: absolute;
  left: 0;
  top: 0;
  opacity: 0;
}


.container {
  display: flex;
  gap: 50%;
}

.file-upload {
  background-color: #ffffff;
  width: 600px;
  margin: 0 auto;
  padding: 20px;
}

.file-upload-wrap {
  margin-top: 20px;
  border: 4px dashed #1fb264;
  position: relative;
}

.drag-text h3 {
  font-weight: 100;
  text-transform: uppercase;
  color: #15824b;
  padding: 60px 0;
}

.remove-file {
  width: 100%;
  margin: 0;
  color: #fff;
  background: #cd4535;
  border: none;
  padding: 10px;
  border-radius: 4px;
  border-bottom: 4px solid #b02818;
  transition: all 0.2s ease;
  outline: none;
  text-transform: uppercase;
  font-weight: 700;
}

.remove-file:hover {
  background: #c13b2a;
  color: #ffffff;
  transition: all 0.2s ease;
  cursor: pointer;
}

.remove-file:active {
  border: 0;
  transition: all 0.2s ease;
}