:root {
--background: #fff;
--text: #111;
--url: #249;
--visited: #269;
--pre-background: #eee;
--pre-border: #ccc; 
}
@media (prefers-color-scheme: dark) {:root {
--background: #1b1b20;
--text: #ccc;
--url: #426fc9;
--visited: #38f;
--pre-background: #222;
--pre-border: #444;
}}
body {
    font-family: system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 'Open Sans', 'Helvetica Neue', sans-serif;
    font-weight: 300;
    padding: 20px 10px;
    background-color: var(--background);
    color: var(--text);
    line-height: 1.4;
}
a {color: var(--url)}
a:visited {color: var(--visited)}
pre {
    font-family: 'Courier New', Courier, monospace;
    font-size: small; 
    background-color: var(--pre-background);
    border-color: var(--pre-border);
    border-left: 3px solid var(--visited);
}
pre code {background-color: var(--pre-background); padding: 0;}
code {background-color: var(--pre-background);}
img {padding:0; margin: 10px auto; width: 100%;}
blockquote {border: 0; border-left: 3px solid var(--pre-border); 
    margin: 20px auto; padding: 10px}
input.ask {
    padding: 6px 16px;
    margin: 6px;
    font-size: 16px; 
    background-color: var(--background);
    color: var(--text);
    border: 1px solid var(--pre-border);
    border-radius: 10px;
    width: 100%;
    max-width: 450px;
    float: right;
}
em {font-family: 'Times New Roman', Times, serif; font-weight: 400px;}
span.br {color: #f00}
.x {background-color: #f00; color: #fff; padding:0 4px; border-radius: 4px; margin: 2px}
.container {margin: 10px auto; max-width: 963px;}
.header {margin-top: 30px; padding: 10px 0; border-bottom: 1px solid var(--pre-border)}
.contents {margin: 50px auto 60px; font-weight: 400;}
.logo a {font-size: 27px; font-weight: bold; text-decoration: none;}
.menu a {font-weight: bold;}
.menu a, .menu-admin a {text-decoration: none; margin: 0 6px}
/* .menu-admin {float:right} */
.footer {margin-top: 30px; padding: 10px 0; font-size: small; border-top: 1px solid var(--pre-border)}
.copyright {margin-top: 4px;}