move css to separated cachable file, update config api

static/theme/default.css

@@ -0,0 +1,147 @@
+* {
+    border: 0;
+    margin: 0;
+    padding: 0;
+    box-sizing: border-box;
+    outline: none;
+}
+:focus,
+:focus-within,
+:focus-visible,
+:active,
+:target,
+:hover {
+    opacity: 1;
+    transition: opacity .2s ease-in-out;
+}
+
+body {
+    background: #282b3c;
+    color: #ccc;
+    font-family: Sans-serif;
+    font-size: 13px;
+}
+
+a,
+a:visited,
+a:active {
+    color: #96d9a1;
+    text-decoration: none;
+    opacity: .9;
+}
+
+h1, h2, h3, h4, h5 {
+    display: inline-block;
+    font-weight: normal;
+}
+
+h1 {
+    font-size: 16px;
+}
+
+h2 {
+    color: #ccc;
+    font-size: 14px;
+}
+
+body > * {
+    position: relative;
+    overflow: hidden;
+    max-width: 748px;
+}
+
+header, footer {
+    text-align: center;
+    margin: 16px auto;
+}
+
+header > a,
+header > a:active,
+header > a:hover,
+header > a:visited {
+    color: #ccc;
+    font-size: 20px;
+}
+
+header::first-letter {
+    color: #96d9a1;
+}
+
+header > div {
+    margin-top: 16px;
+}
+
+header > div > code:not(:last-child)::after {
+    content: "|";
+    margin: 0 6px;
+}
+
+main {
+    margin: 0 auto;
+}
+
+/* pagination */
+main > a {
+    background: #34384f;
+    border-radius: 3px;
+    float: right;
+    margin-left: 8px;
+    opacity: .96;
+    padding: 8px;
+}
+
+/* item row */
+main > div {
+    background-color: #34384f;
+    border-radius: 3px;
+    margin: 8px 0;
+    padding: 24px;
+}
+
+/* item row description */
+main > div > p {
+    margin: 8px 0;
+}
+
+/* item row meta, controls */
+main > div > div {
+    border-top: 1px #4f536a solid;
+    margin-top: 16px;
+    overflow: hidden;
+    padding-top: 16px;
+}
+
+main > div > div > ul {
+    list-style: none;
+}
+
+main > div > div > ul > li {
+    cursor: default;
+    float: left;
+}
+
+main > div > div > ul > li > span {
+    color: white;
+    font-size: smaller;
+    opacity: 0.7;
+}
+
+main > div > div > ul > li > span:hover {
+    opacity: 1;
+}
+
+main > div > div > ul > li:not(:last-child)::after {
+    content: "•";
+    margin: 0 6px;
+}
+
+main > div > div > a > svg {
+    float: right;
+    vertical-align: middle;
+}
+
+/* pagination info */
+main > span {
+    float: right;
+    padding: 8px;
+}