:root {
    --BLACK : #202020;
    --WHITE: #dfdfdf;
    /**/
    --BACK_COLOR: var(--BLACK);
    --TEXT_COLOR: var(--WHITE);
    /*
    --BACK_COLOR: #f3f3f3;
    --TEXT_COLOR: #101010;
    */
    --SPACE_COLOR: #888888;
    --ACCENT_COLOR: #4196d3;
    --MAX_WIDTH: 960px;
    --TRANSITION_TIME: 0.3s;

    --TIP_COLOR: #33b519;
    --INFO_COLOR: #4196d3;
    --WARN_COLOR: #e17c08;
    --DANGER_COLOR: #e60a0a;
}

@media (prefers-color-scheme: light) {
    :root {
        --BACK_COLOR: var(--WHITE);
        --TEXT_COLOR: var(--BLACK);
    }
}
  
@media (prefers-color-scheme: dark) {
    :root {
        --BACK_COLOR: var(--BLACK);
        --TEXT_COLOR: var(--WHITE);
    }
}

* {
    margin: 0;
    font-family: sans-serif;
    box-sizing: border-box;
    scrollbar-color: var(--ACCENT_COLOR) var(--SPACE_COLOR);
}

*::-webkit-scrollbar {
    width: 8px;
    height: 4px;
}

*::-webkit-scrollbar-track {
    background: var(--SPACE_COLOR);
}

*::-webkit-scrollbar-thumb {
    background: var(--ACCENT_COLOR);
}

body {
    background-color: var(--BACK_COLOR);
    min-width: 240px;
    min-height: calc(100vh - 16px);
    min-height: calc(100svh - 16px);
    transition: background-color var(--TRANSITION_TIME) ease-in-out;
}

header, footer, #main {
    width: 95%;
    max-width: var(--MAX_WIDTH);
    margin: 0 auto;
}

header {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    justify-content: space-between;
    min-height: 48px;
    margin-top: 16px;
    user-select: none;
    overflow-x: hidden; /* preliminary */
}

header .header_content {
    display: flex;
    align-items: center;
    gap: 8px;
}

header .header_title {
    color: var(--TEXT_COLOR);
    text-decoration: none;
    font-weight: bold;
}

header #themeSwitch {
    font-size: 24px;
}

header .menu {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

header .menu a {
    text-decoration: none;
    font-size: 16px;
    font-weight: bold;
    white-space: nowrap;
    max-width: 90vw; /* preliminary */
    overflow: hidden;
    text-overflow: ellipsis;
}

footer {
    position: sticky;
    top: 100vh;
    background-color: var(--MENU_COLOR);
    margin: 32px auto 0 auto;
    padding: 4px 0;
}

footer * {
    color: var(--MENU_TEXT_COLOR);
}

h1, h2, h3, h4, h5, h6, div, p, span, a, code {
    transition: color var(--TRANSITION_TIME) ease-in-out;
}

h1, h2, h3, h4, h5, h6, div, p, span:not(#postBody pre code span), a {
    color: var(--TEXT_COLOR);
}

#postInfo {
    display: flex;
    flex-direction: column;
    margin: 32px 0;
}

#postInfo #postMeta * {
    font-size: 12px;
}

#postBody * {
    margin: 8px 0;
    word-break: break-all;
    word-wrap: break-word;
}

#postBody h1 {
    border-bottom: solid 4px var(--ACCENT_COLOR);
    font-size: 32px;
}

#postBody h2 {
    padding-left: 6px;
    border-left: solid 4px var(--ACCENT_COLOR);
    font-size: 28px;
}

#postBody h3 {
    padding-left: 6px;
    border-left: solid 4px var(--ACCENT_COLOR);
    font-size: 24px;
}

#postBody h4, #postBody h5, #postBody h6 {
    position: relative;
    padding-left: 6px;
    /*border-left: solid 2px var(--ACCENT_COLOR);*/
}

#postBody h4::after, #postBody h5::after, #postBody h6::after {
    z-index: -1;
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    background-color: var(--ACCENT_COLOR);
    width: 4px;
    aspect-ratio: 1/2;
}

#postBody h4 {
    font-size: 20px;
}

#postBody h5 {
    font-size: 16px;
}

#postBody h6 {
    font-size: 12px;
}

#postBody p, #postBody blockquote, #postBody, span {
    line-height: 2em;
    letter-spacing: 0.05em;
}

#postBody p {
    margin-bottom: 32px;
    font-size: 18px;
}

#postBody img:not(#postBody .inline_img), #postBody video {
    background-color: var(--SPACE_COLOR);
    width: 100%;
    border-radius: 4px;
    aspect-ratio: 16/9;
    object-fit: contain;
    overflow: hidden;
}

#postBody code:not(#postBody pre code) {
    background-color: var(--TEXT_COLOR);
    color: var(--BACK_COLOR);
    padding: 0 4px;
    border-radius: 4px;
}

#postBody pre {
    background-color: var(--SPACE_COLOR);
    margin: 32px 0;
    padding: 16px;
    border-top: solid 8px var(--ACCENT_COLOR);
    border-radius: 4px;
    overflow-x: auto;
    /*-webkit-overflow-scrolling: touch;*/
}

#postBody a {
    color: var(--ACCENT_COLOR);
    font-weight: bold;
}

#postBody a.post_card {
    position: relative;
    display: flex;
    flex-direction: column;
    justify-content: center;
    /*background-color: var(--TEXT_COLOR);*/
    min-height: 64px;
    margin: 16px 0;
    padding: 16px 8px;
    border: solid 2px var(--ACCENT_COLOR);
    border-left: solid 16px var(--ACCENT_COLOR);
    border-radius: 8px;
    text-decoration: none;
    overflow: hidden;
}

#postBody a.post_card span {
    color: var(--TEXT_COLOR);
    margin: 0;
    font-weight: bold;
}

#postBody a.post_card span.post_title {
    display: -webkit-box;
    font-size: 24px;
    overflow: hidden;
    -webkit-box-orient: vertical;
    -webkit-line-clamp: 3;
}

#postBody a.post_card span.post_date {
    color: var(--ACCENT_COLOR);
    font-size: 16px;
}

#postBody a.post_card span.post_category, #postBody a.post_card span.post_tags {
    font-size: 12px;
}

#postBody blockquote {
    position: relative;
    padding: 8px;
    border-left: solid 8px var(--TEXT_COLOR);
    border-radius: 4px;
    opacity: 0.9;
    overflow: hidden;
}

#postBody blockquote::after {
    z-index: -1;
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    background-color: var(--TEXT_COLOR);
    width: 100%;
    height: 100%;
    opacity: 0.1;
}

#postBody .tip, #postBody .info, #postBody .warn, #postBody .denger {
    position: relative;
    padding: 8px;
    border-radius: 4px;
}

#postBody .tip {
    border: solid 2px var(--TIP_COLOR);
    border-left: solid 8px var(--TIP_COLOR);
}

#postBody .info {
    border: solid 2px var(--INFO_COLOR);
    border-left: solid 8px var(--INFO_COLOR);
}

#postBody .warn {
    border: solid 2px var(--WARN_COLOR);
    border-left: solid 8px var(--WARN_COLOR);
}

#postBody .denger {
    border: solid 2px var(--DANGER_COLOR);
    border-left: solid 8px var(--DANGER_COLOR);
}

#postBody table {
    display: block;
    max-width: 100%;
    margin: 16px 0;
    border-collapse: collapse;
    overflow: hidden;
    overflow-x: auto;
}

#postBody table thead {
    border-bottom: 2px solid var(--TEXT_COLOR);
}

#postBody table th, #postBody table td {
    min-width: 120px;
    padding: 8px 16px;
    border: none;
    border-left: 1px solid var(--TEXT_COLOR);
    border-top: 1px solid var(--TEXT_COLOR);
    text-align: left;
}

#postBody table td:first-child, #postBody table th:first-child{
    border-left:none;
}

#postBody table tr:first-child td, #postBody table tr:first-child th{
    border-top:none;
}

#postBody .link_card {
    display: block;
    /*background-color: var(--TEXT_COLOR);*/
    margin: 16px 0;
    padding: 8px;
    border: solid 2px var(--ACCENT_COLOR);
    border-left: solid 16px var(--ACCENT_COLOR);
    border-radius: 8px;
    text-decoration: none;
}

#postBody .link_card * {
    /*color: var(--BACK_COLOR);*/
}

#postBody .link_card .link_card_here {
    display: block;
    font-size: 12px;
    font-weight: bold;
}

#postBody .link_card .link_card_title {
    display: -webkit-box;
    font-size: 18px;
    font-weight: normal;
    overflow: hidden;
    -webkit-box-orient: vertical;
    -webkit-line-clamp: 2;
}

#postBody .inline_img {
    display: inline-block;
    width: 1em;
    margin: 0;
    vertical-align: middle;
    aspect-ratio: 1/1;
    object-fit: contain;
}

#postBaf {
    display: grid;
    gap: 16px;
    grid-template-columns: calc(50% - 16px) calc(50% - 16px);
    justify-content: center;
    width: 100%;
    min-height: 120px;
    margin: 32px 0;
    user-select: none;
}

#postBaf .baf_content {
    max-height: 240px;
    padding: 16px;
    border: solid 2px var(--ACCENT_COLOR);
    border-radius: 4px;
    text-decoration: none;
    overflow: hidden;
}

#postBaf .baf_prev, #postBaf .baf_next {
    font-size: 12px;
}

#postBaf .baf_next {
    text-align: right;
}

#postBaf .baf_title {
    font-size: 16px;
    font-weight: bold;
    word-break: break-all;
    word-wrap: break-word;
}

/* mob */
@media screen and (max-width: 480px) {   
    header .header_title {
        font-size: 24px;
    }

    #postInfo #headline {
        font-size: 24px;
    }
}

/* pc */
@media screen and (min-width: 480px) {
    header .header_title {
        font-size: 28px;
    }

    #postInfo #headline {
        font-size: 32px;
    }
}