.top-banner{
    width:100%;
    /* background-image:url('https://images.unsplash.com/photo-1490750967868-88aa4486c946'); */
    background-size:cover;
    background-position:center;
    color:white;
    position:relative;
    padding:40px 35px;
    box-shadow:0 3px 10px rgba(0,0,0,0.2);

    animation: slideDown 2s ease forwards;  
}

@keyframes slideDown{
    from{
        transform: translateY(-100%);
        opacity:0;
    }
    to{
        transform: translateY(0);
        opacity:1;
    }
}

.top-banner::before{
    content:"";
    position:absolute;
    top:0;
    left:0;
    width:100%;
    height:100%;
    background:rgba(0,0,0,0.45);
}

.banner-content{
    position:relative;
    max-width:900px;
    margin:auto;
    text-align:center;
    font-family:Arial, sans-serif;
	font-size: 20px;
    line-height:1.3;
}

.phone-button{
    display:inline-block;
    margin:15px 0;
    padding:12px 20px;
    background:#4CAF50;
    color:white;
    text-decoration:none;
    border-radius:6px;
    font-weight:bold;
}

.phone-button:hover{
    background:#3e9142;
}

.close-banner{
    position:absolute;
    right:45px;
    top:5px;
    background:none;
    border:none;
    font-size:22px;
    color:white;
    cursor:pointer;
}