h1 {
    text-align: center;
}
#register_board {
    margin-left: 50%;
    display: none;
    margin-right: 50px;
}
#my_board {
    display: none;
    margin-right: 50px;
}
#update {
    display: none;
    margin-left: 30px;
}
#logout_btn {
    /* height: 30px; */
    /* flex-grow: 1; */
    /* display: inline-block; */
    display: none;
    margin-right: 50px;
}
#login_btn {
    /* height: 30px; */
    /* flex-grow: 1; */
    /* display: inline-block; */
    margin-right: 50px;
}
#alert_icon {
    margin-left: auto;
    display: block;
    width: 100px;
    height: 50px;
    margin-right: 50px;
    /* object-fit: cover; */
    /* height: 100px; */
    /* width: 100; */
}
#top_navi {
    /* height: 200px; */
    /* border: 1px solid blue; */
    margin-left: auto;
    /* border: 3px dotted blue; */
    /* width: 50%; */
    display: flex;
}
#side_navi {
    display: flex;
    justify-content: center;
    align-items: center;
    vertical-align: middle;
    text-align: center;
    float: left;
    width: 20vw;
    height: 80vh;
    /* border: 1px solid blue; */
}
#board_search {
    height: 100px;
    /* width: auto; */
    margin-left: auto;
    margin-right: auto;
    justify-self: center;
    /* border: 1px solid blue; */
    /* width: 100%;      */
}
#board {
    width: 70vw;
    height: 80vh;
    display: grid;
    /* border: 1px solid blue; */
    margin: 0 auto;
}
.category {
    width: 500px;
    margin: 5px;
    height: 25px;
}
#category_search {
    color: white;
    background-color: black;
    margin: 5px;
    height: 30px;
}
select {
    width: 100px;
    margin: 5px;
    height: 30px;
}
#board_table {
    margin-left: auto;
    margin-right: auto;
    justify-self: center;
}
#board_page {
    align-self: flex-end;
    /* text-align: end; */
    margin-left: auto;
    margin-right: auto;
    justify-self: center;
}
#alert_icon {
    width: 20px;
}
#page_icon1 {
    width: 12px;
    margin: 0px 20px;
}
#page_icon2 {
    width: 12px;
    margin: 0px 20px;
}
table {
    font-family: "arial", "sans-serif";

    border: 1px solid black;
    border-collapse: collapse;
}
tr {
    border-bottom: 1px solid black;
}
th,
td {
    padding: 10px;
    text-align: center;
    /* border:  1px solid black; */
}
th {
    background-color: grey;
}