header {
    background-image: url("/static/entrance.jpg");
    background-size: cover;
    background-repeat: no-repeat;
    background-position: center;
    display: block;
    height: 300px;
    background-color: burlywood;
    border-radius: 2px;
    border: ridge, 5px, lightgrey;
    box-shadow: 0px 0px 10px 5px white;
}
body {
    background-image: url("/static/summer_stone.jpg");
    background-repeat: no-repeat;
    background-attachment: fixed;
    background-size: cover;
    background-position: center;
}

.a {
    display: block;
    text-decoration: none;
    font-size: large;
    font-family: 'Times New Roman', Times, serif;
    color: orange;
    text-align: center;
    background-color: white;
    margin-right: 30%;
    margin-left: 30%;
    margin-bottom: 10px; 
    box-shadow: 0px 0px 10px 5px white;
}

.slideshow-container {
    position:relative;
    display: block;
    width: 40%;
    height:40%;
    margin: auto;
    margin-top: 10%;
    text-align: center;
    border: 5px white;
    border-style: ridge;
    border-color: lightslategray;
    box-shadow: 0px 0px 10px 5px
}
.slides {
    width: 100%;
    height: 100%;
} 


.a::before {
    content: "\273A";

}

.a::after {
    content: "\273A";
}