add spcss

sp.css

@@ -0,0 +1,101 @@
+body {
+  color: #333;
+  font-family: helvetica, arial, sans-serif;
+  line-height: 1.5;
+  margin: 0 auto;
+  max-width: 40em;
+  padding: 0 1em;
+}
+h1, h2, h3, h4, h5, h6 {
+  margin: 1em 0 0.5em 0;
+  line-height: 1.2;
+}
+a:link, a:visited {
+  color: #03c;
+  text-decoration: none;
+}
+a:hover, a:active, a:focus {
+  color: #06f;
+  text-decoration: underline;
+}
+h1 a:empty:before, h2 a:empty:before, h3 a:empty:before,
+h4 a:empty:before, h5 a:empty:before, h6 a:empty:before {
+  content: "#";
+}
+h1 a:empty, h2 a:empty, h3 a:empty, h4 a:empty, h5 a:empty, h6 a:empty {
+  visibility: hidden;
+  padding-left: 0.25em;
+}
+h1:hover a:empty, h2:hover a:empty, h3:hover a:empty,
+h4:hover a:empty, h5:hover a:empty, h6:hover a:empty {
+  visibility: visible;
+}
+img {
+  max-width: 100%;
+}
+figure {
+  margin: 1em 0;
+  text-align: center;
+}
+figcaption {
+  font-size: small;
+}
+pre, code, samp, kbd {
+  color: #009;
+  font-family: monospace, monospace;
+}
+pre kbd {
+  color: #060;
+}
+pre, blockquote {
+  background: #eee;
+  padding: 0.5em;
+}
+pre {
+  overflow: auto;
+}
+blockquote {
+  border-left: medium solid #ccc;
+  margin: 1em 0;
+}
+blockquote :first-child {
+  margin-top: 0;
+}
+blockquote :last-child {
+  margin-bottom: 0;
+}
+table {
+  border-collapse: collapse;
+}
+th, td {
+  border: thin solid #999;
+  padding: 0.3em 0.4em;
+  text-align: left;
+}
+@media (prefers-color-scheme: dark) {
+  body {
+    color: #bbb;
+    background: #222;
+  }
+  a:link, a:visited {
+    color: #9bf;
+  }
+  a:hover, a:active {
+    color: #acf;
+  }
+  pre, code, samp, kbd {
+    color: #6cf;
+  }
+  pre kbd {
+    color: #9c9;
+  }
+  pre, blockquote {
+    background: #111;
+  }
+  blockquote {
+    border-color: #444;
+  }
+  th, td {
+    border-color: #666;
+  }
+}