:root {
    --font_family: 'KingHwa_OldSong', "Inter", sans-serif;
    --font_size: 16px;
    --background_image: url("../img/bg11.jpg") rgb(40, 40, 45);
    --background_color: #0e0e0e;
    --image_border_color: #000;
    --image_border_px: 3px;
}

body {
    font: var(--font_size) var(--font_family);
    font-weight: 400;
    line-height: 1.5;
    background: var(--background_image) no-repeat center center;
    background-size: 100% 100%;
    height: 100vh;
    min-height: 100vh;
    display: flex;
    flex-direction: row;
    flex-wrap: wrap;
}

header {
    width: 200px;
    min-width: 150px;
    height: 100vh;
    min-height: 100vh;
    background-color: #070707;
    opacity: 0.5;
}

header ul {
    width: 90%;
}

header li {
    border: #C1BDBD 1px solid;
    opacity: 0.7;
    list-style-type: none;
    margin-top: 10px;
    text-align: center;
    padding: 15px 8px;
}

header li:hover {
    background-color: #C1BDBD;
    color: black;
    cursor: pointer;
}

header li:hover a {
    background-color: #C1BDBD;
    color: black;
    cursor: pointer;
}

header li a:link {
    text-decoration: none;
    color: white;
}

header li a:visited {
    text-decoration: none;
    color: white;
}

header li a:hover {
    color: black;
}

header li a:active {
    text-decoration: none;
}

main {
    flex: 1;
    height: 100vh;
    min-height: 100vh;
}

#com_title {
    font-size: 3rem;
    line-height: 3rem;
    margin-bottom: 3rem;
    color: #000000;
    text-align: center;
}

#com_desc {
    font-size: 1.5rem;
    /*font-weight: 700;*/
    line-height: 1.5rem;
    margin-bottom: 1.5rem;
    color: #1a2226;
    text-align: center;
}

#footer {
    font-size: 1rem;
    text-align: center;
    position: absolute;
    bottom: 0;
}

#footer a:link {
    text-decoration: none;
    color: #0a568c;
}

#footer a:visited {
    text-decoration: none;
    color: #0a568c;
}

.flex_column_center {
    display: flex;
    flex-direction: column;
    flex-wrap: wrap;
    justify-content: center;
    align-items: center;
}

.flex_row_center {
    display: flex;
    flex-direction: row;
    flex-wrap: wrap;
    justify-content: center;
    align-items: center;
}

.flex_no_wrap_row_center {
    display: flex;
    flex-direction: row;
    flex-wrap: nowrap;
    justify-content: center;
    align-items: center;
}