html, body {
    height: 100%;
}

body {
    display: grid;
    font-family: Avenir, sans-serif;
    color: #111;
}

a {
    text-decoration: none;
    color: inherit;
}

.cta {
    position: relative;
    margin: auto;
    padding: 9px 5px;
    transition: all 0.2s ease;
}

    .cta:before {
        content: "";
        position: absolute;
        top: 0;
        left: 0;
        display: block;
        border-radius: 28px;
        background: rgba(0, 128, 0, 0.5);
        width: 30px;
        height: 35px;
        transition: all 0.3s ease;
    }

    .cta span {
        position: relative;
        font-size: 13px;
        line-height: 18px;
        font-weight: 600;
        vertical-align: middle;
    }

    .cta svg {
        position: relative;
        top: 0;
        margin-left: 10px;
        fill: none;
        stroke-linecap: round;
        stroke-linejoin: round;
        stroke: #111;
        stroke-width: 2;
        transform: translateX(-5px);
        transition: all 0.3s ease;
    }

    .cta:hover:before {
        width: 100%;
        background: rgba(0, 128, 0, 0.7);
    }

    .cta:hover svg {
        transform: translateX(0);
    }

    .cta:active {
        transform: scale(0.96);
    }