body{
    height: 1000px;
    overflow-y: scroll;
}
.top_head{
    position: sticky;
    z-index: 1;
    top: 0;
    background-color: white;
}

.header{
    display: flex;
    margin: 0;
    height: 80px;
}
.header_side{
    display: flex;
    margin: 20px;
    align-items: center;
    gap: 12px;
    padding: 10px;
    
}
.header_name{
    display: flex;
    margin-right: auto;
    align-items: center;
}
h1{
    margin: 20px;
}
.header_menu{
    border: 1px solid black;
    border-radius: 4px;
    padding: 7px 16px;
    background-color: white;
}
a.link:hover{
    background-color: rgb(0, 0, 0, 0.1);
}
.header_menu:hover{
    transform: scale(1.1);
}
.header_login{
    border: 1px solid black;
    border-radius: 4px;
    padding: 7px 10px;
    font-size: 1rem;
    background-color: black;
    color: aliceblue;
    text-decoration: none;
}
.menu_extend .link:hover {
    transform: scale(1.05);
    font-weight: bold;
}

.header_login:hover{
    transform: scale(1.1);   
}
.hname{
    font-size: 32px;
    color: black;
    
    text-decoration: none;
    font-weight: bold;
}
@keyframes menu_out {
    0% {
        transform: translateX(200px);
    }
    100% {
        transform: translateX(0px);
    }
}
@keyframes menu_in{
    0% {
        transform: translateX(0px);
    }
    100% {
        transform: translateX(200px);
    }
}