styles.css

/***************
*
*   DEMO PAGE STYLES
*
*************/

* {
    -webkit-box-sizing: border-box;
    box-sizing: border-box;
    font-family: 'Roboto Slab', serif;
}

h1, h2, h3, h4, h5, h6 {
    margin: 0;
    font-weight: normal;
}

h2 {
    text-align: center;
}

@keyframes pump {
  0% {
    transform: scale3d(0.5,0.5,5);
  }
  50% {
    transform: scale3d(1,1,1);
  }
  100% {
    transform: scale3d(0.5,0.5,5);
  }
}

@keyframes blink {
    0% {
        opacity: 0;
    }
    50% {
        opacity: 1;
    }
    100% {
        opacity: 0;
    }
}

.container {
    display: -webkit-flex;
    display: -moz-flex;
    display: -ms-flex;
    display: -o-flex;
    display: flex;
    flex-flow: column;
    justify-content: center;
    align-items: center;

    width: 100%;
    height: 100vh;
    background: #f9f9f9;

    padding: 32px;
    border-bottom: 4px solid #FD1472;
    }
    .typethis,
    .typethis__output {
        display: inline-block;
        position: relative;
        }
    .typethis__output {
        z-index: 1;
        }


.cursor {
    display: block;
    width: 2px;
    height: 100%;
    position: absolute;
    top: 0;
    right: 0;
    z-index: 0;
    background-color: #FD1472;
    transition: all 200ms linear;
    animation: blink 1s infinite forwards;
    }
    .cursor.is-done {
        width: 100%;
        animation: none;
        }

.button__start {
    display: inline-block;
    padding: 10px 20px;
    position: absolute;
    top: 100px;
    right: 100px;
    color: #FD1472;
    border: 2px solid currentColor;
    border-radius: 4px;
    background: transparent;
    transition: all 200ms ease-in-out;
}
    .button__start:hover, .button__start:focus {
        color: #fafafa;
        border-color: #FD1472;
        background: #FD1472;
        }


#svg-heart {
    margin-top: 8px;
    transition:  all 200ms linear;
    animation: pump 3s infinite forwards;
    -webkit-backface-visibility: hidden;
    }
    .st0{
        fill:#FD1472;
        }