Vertical Alignment

<svg
    xmlns="http://www.w3.org/2000/svg"
    width="100"
    height="100"
    viewBox="0 0 512 512"
>
    <linearGradient
        id="a"
        x1="1.787"
        x2="513.787"
        y1="255.685"
        y2="255.685"
        gradientTransform="matrix(.9942 0 0 -.9942 -.285 510.196)"
        gradientUnits="userSpaceOnUse"
    >
        <stop offset="0" stop-color="#00f2fe" />
        <stop offset=".021" stop-color="#03effe" />
        <stop offset=".293" stop-color="#24d2fe" />
        <stop offset=".554" stop-color="#3cbdfe" />
        <stop offset=".796" stop-color="#4ab0fe" />
        <stop offset="1" stop-color="#4facfe" />
    </linearGradient>
    <path
        d="M510.509 19.883c0 10.982-8.902 19.883-19.884 19.883H21.375c-10.982 0-19.883-8.902-19.883-19.883S10.393 0 21.375 0h469.25c10.982 0 19.884 8.902 19.884 19.883zM399.161 80.528h-56.668c-38.373 0-69.592 31.219-69.592 69.592v292.287c0 38.373 31.219 69.592 69.592 69.592h56.668c38.373 0 69.592-31.219 69.592-69.592 0-10.982-8.902-19.883-19.884-19.883-10.982 0-19.883 8.902-19.883 19.883 0 16.446-13.38 29.825-29.825 29.825h-56.668c-16.446 0-29.825-13.38-29.825-29.825V150.12c0-16.446 13.38-29.825 29.825-29.825h56.668c16.446 0 29.825 13.38 29.825 29.825v191.876c0 10.982 8.902 19.883 19.883 19.883 10.982 0 19.884-8.902 19.884-19.883V150.12c0-38.373-31.219-69.592-69.592-69.592zM235.122 150.12v113.336c0 38.373-31.219 69.592-69.592 69.592h-56.668c-38.373 0-69.592-31.219-69.592-69.592V150.12c0-38.373 31.219-69.592 69.592-69.592h56.668c38.373 0 69.592 31.219 69.592 69.592zm-39.767 0c0-16.446-13.38-29.825-29.825-29.825h-56.668c-16.446 0-29.825 13.38-29.825 29.825v113.336c0 16.446 13.38 29.825 29.825 29.825h56.668c16.446 0 29.825-13.38 29.825-29.825V150.12z"
        fill="url(#a)"
    />
</svg>