body {
    margin: 0;
    display: flex;
    justify-content: center;
    height: auto;
    background-image: url("../image/red-tree.jpg");
    background-size: cover;
    background-repeat: no-repeat;
    background-position: center;
}

.but-index{
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    height: 100vh;
}
.but-index > a {
    font-family: monospace;
    font-size: 1.3em;
    text-decoration: none;
    margin: 20px;
    color: rgb(0, 0, 0);
    background-color: rgb(191, 177, 203);

    padding: 15px;
    border-radius: 15px;
    border: solid 2px black;
}

.but-index a:hover{
    background-color: beige;
}
.bg-index {
    background-color: black;
    border-radius: 15px;
    height: 100vh;
    width: 50vh;
    background: linear-gradient(70deg, rgba(0, 0, 0, 0.306),rgba(254, 254, 255, 0.342));
 
}