Николай Угольников

input {
    appearance: none;
}

.contacts::after {
    content: "";
    background: url() no-repeat;
    height: 100%;
    right: 0;
    ...
}

<svg ...>
    <image x="0" y="0" width="" height="" xlink:href="/img/" />
</svg>

input::placeholder {
    background: url(img/icon.svg) no-repeat;
}