Изменение иконки в поиске

index.html

              <form action="#" method="POST" class="search-form">
                <input class="search-input" type="text" placeholder="Поиск:" />
                <label class="search-label">
                </label>
              </form>

style.css

/* при наведении */
input[type="text"]:hover::placeholder {
  color: white;
}
input:hover + label.search-label:before {
  background: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='17' height='17' viewBox='0 0 17 17'%3E%3Cpath fill='white' d='M17 15.586l-3.542-3.542A7.465 7.465 0 0 0 15 7.5 7.5 7.5 0 1 0 7.5 15c1.71 0 3.282-.579 4.544-1.542L15.586 17 17 15.586zM2 7.5C2 4.467 4.467 2 7.5 2 10.532 2 13 4.467 13 7.5c0 3.032-2.468 5.5-5.5 5.5A5.506 5.506 0 0 1 2 7.5z'/%3E%3C/svg%3E%0A") center / contain no-repeat;
}

label.search-label:before {
  content: "";
  position: absolute;
  left: 10px;
  top: 0;
  bottom: 0;
  width: 20px;
  background: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='17' height='17' viewBox='0 0 17 17'%3E%3Cpath fill='gray' d='M17 15.586l-3.542-3.542A7.465 7.465 0 0 0 15 7.5 7.5 7.5 0 1 0 7.5 15c1.71 0 3.282-.579 4.544-1.542L15.586 17 17 15.586zM2 7.5C2 4.467 4.467 2 7.5 2 10.532 2 13 4.467 13 7.5c0 3.032-2.468 5.5-5.5 5.5A5.506 5.506 0 0 1 2 7.5z'/%3E%3C/svg%3E%0A") center / contain no-repeat;
}

input:focus + label.search-label:before {
  background: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='17' height='17' viewBox='0 0 17 17'%3E%3Cpath fill='red' d='M17 15.586l-3.542-3.542A7.465 7.465 0 0 0 15 7.5 7.5 7.5 0 1 0 7.5 15c1.71 0 3.282-.579 4.544-1.542L15.586 17 17 15.586zM2 7.5C2 4.467 4.467 2 7.5 2 10.532 2 13 4.467 13 7.5c0 3.032-2.468 5.5-5.5 5.5A5.506 5.506 0 0 1 2 7.5z'/%3E%3C/svg%3E%0A") center / contain no-repeat;
}