body{
        font-family: arial, sans-serif;
        margin: 0;
        padding: 0;
    }
    header{
        background-color: #222;
        color: white;
        padding: 12px;
        text-align: center;
    }
    h1{
        font-size: 2.5em;
        text-shadow: 5px 5px 3px gray;
    }
    .promo{
        background-image: url(../images/phonebgrd.jpg);
        background-size: 100%;
        opacity: 0.5;
        height: 300px;
        display: flex;
        align-items: center;
        justify-content: center;
        color: white;
        font-size: 4em;
        text-shadow: 3px 3px 3px black;
        color: yellow;
        text-align: center;
    }
    .description{
        display: flex;
        flex-wrap: wrap;
        gap: 12px;
        padding: 20px;
        justify-content: center;
    }
    .feature{
        flex: 1 1 200px;
        border: 1px solid #ccc;
        padding: 12px;
        border-radius: 8px;
    }
    .action{
        background: red;
        color: yellow;
        padding: 30px;
        text-align: center;
    }
    .action button{
        padding: 15px 30px;
        border-radius: 20px;    
    }
    button:hover{
        color: red;
        cursor: pointer;
        font-weight: 800px;
        font-size: 15px;
    }