main {
    background: linear-gradient(to left, transparent 60%, rgb(238, 237, 232) ),
                linear-gradient(to bottom, transparent 60%, rgb(238, 237, 232) ),
                linear-gradient(to right, transparent 60%, rgb(238, 237, 232) ),
                linear-gradient(to top, transparent 60%, rgb(238, 237, 232) ),
                url(../img/tree.jpg);
    background-size: 60vw 70vw;
    background-position: top right;
    background-repeat: no-repeat;
    /**background-attachment: fixed;**/
    background-color: rgb(238, 237, 232);
    min-height: 100vh;
    padding-bottom: 20px;
    padding-top: 100px;
}

.introblock {
    display: block;
    padding-left: 8%;
    padding-top: 8%;
    width: 40vw;
    font-size: large;
}

.linbut {
    display: flex;
    flex-direction: row;
    margin-top: 5vh;
    margin-left: 15vw;
    gap: 10vw;
    
}

.linbut a{
    text-decoration: none;
    padding: 15px;
    border-radius: 20px;
    border: 5px rgb(114, 125, 82) solid;
    color: rgb(114, 125, 82);
    background-color: rgb(238, 237, 232);
}

.linbut a:hover{
    background-color: rgb(114, 125, 82) ;
    color: white;
    transition: color 0.5s;
}

.opt {
    margin-top: 20px;
    display: flex;
    flex-direction: row;
    align-items: center;
    justify-content: center;
    gap: 3vw;
    flex-wrap: wrap;
}
.opt li {
    list-style: none;
    background-color: rgb(247, 246, 242);
    text-align: center;
    border-radius: 20px;
    height: 300px;
    width: 200px;
    padding: 10px;
    min-width: 200px;
}
.opt li h1{
    margin-top: 50px;
    margin-bottom: 50px;
    height: 76px;
}
.opt li p {
    font-size: large;
}