animation_style.css

*, body{
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body{
    width: 100%;
    height: 100vh;
    font-family: 'Courier New', Courier, monospace;
    background-image:  url('./christmas-bg.jpg');
    background-position: 0px;
    background-size: cover;
    background-repeat: no-repeat;

}

div.frame{
    width: 100%;
    height: 100%;
    background: linear-gradient(260deg, rgb(83, 180, 236, 0.5), rgb(241, 156, 141, 0.5));
    background-repeat: no-repeat;
}

div.content{
    position: absolute;
    width: calc(100vw * 0.5);
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    word-wrap: break-word;
    
}

div.content div.textual-content{
    margin: 20px;
    padding: 10px;
    background: rgba(255, 255, 255, 0.09);
    border-radius: 16px;
    box-shadow: 0 4px 30px rgba(0, 0, 0, 0.1);
    backdrop-filter: blur(2.8px);
    -webkit-backdrop-filter: blur(2.8px);
    border: 1px solid rgba(255, 255, 255, 0.3);
}

div.content div.textual-content p{
    font-size: 5.5rem;
    font-weight: bolder;
    text-align: center;
    color: white;
    text-shadow: 3px 3px 3px pink;
    cursor:none;
    user-select: none;
    -webkit-user-select: none;
}

div.button-control{
    position: relative;
    width: 50%;
    margin: 0 auto 10px auto;
    /*background-color: #53b4ec;*/
    text-align: center;
}

div.button-control button.animate{
    padding: 10px;
    border: 3px solid #ffffff;
    border-radius: 25px;
    outline: 2px solid #07cc07f1;
    background-color: #08e008e7;
    font-family:'Times New Roman', Times, serif;
    font-size: 25px;
    color: rgb(22, 22, 22);
    
}

/*Animation*/

@keyframes highlighting {
    0%  {
        color: #000000;
        text-shadow: 3px 3px 3px #ffffff, -3px -3px 3px #f5e7e7;
    };
    25% { 
        color: #2e2e2e;
        text-shadow: 3px 3px 3px #dad0d0, -3px -3px 3px #c2b3b3;
    };
    35% {
        color: #757272;
        text-shadow: 3px 3px 3px #a08b8b, -3px -3px 3px #f3d7df;
    };
    55% {
        color: #2e2e2e;
        text-shadow: 3px 3px 3px #c0b9b9, -3px -3px 3px #d4c2c2;
    };
    75% {
        color: #2e2e2e;
        text-shadow: 3px 3px 3px #ffffff, -3px -3px 3px #f85b5b;
    };
    90% {
        color: #f3ebeb;
        text-shadow: 3px 3px 3px #c0b9b9, -3px -3px 3px #c2b3b3;
    };
    100% {
        color: #fdf9f9;
        text-shadow: 3px 3px 3px #dad0d0, -3px -3px 3px #c2b3b3;
    };

}

div.content div.textual-content p{
 animation-name: highlighting;
 animation-duration: 10s;
 animation-delay: 0ms;
 animation-timing-function: linear;
 animation-iteration-count: infinite;
}