Add core theme variables and service adapters

adapters/nextcloud.css

@@ -0,0 +1,68 @@
+/**
+ * RSP Works - Nextcloud Theme Adapter
+ * Applies blog theme to Nextcloud interface
+ *
+ * Deploy to: Nextcloud container at /var/www/html/themes/custom/
+ */
+
+@import url('../css/core.css');
+
+/* Base */
+body {
+    background-color: var(--background) !important;
+    color: var(--text-primary) !important;
+    font-family: var(--font-family) !important;
+}
+
+/* Top header bar */
+#header {
+    background-color: var(--text-secondary) !important;
+}
+
+/* Links */
+a {
+    color: var(--link-color) !important;
+}
+a:hover, a:focus {
+    color: var(--link-hover) !important;
+}
+
+/* Buttons */
+.button.primary,
+button.primary,
+input[type="submit"] {
+    background-color: var(--text-secondary) !important;
+    color: white !important;
+    border-color: var(--text-secondary) !important;
+}
+.button.primary:hover,
+button.primary:hover {
+    background-color: var(--link-hover) !important;
+}
+
+/* Sidebar navigation */
+#app-navigation {
+    background-color: var(--background) !important;
+}
+#app-navigation a {
+    color: var(--text-secondary) !important;
+}
+#app-navigation a:hover {
+    color: var(--link-hover) !important;
+}
+
+/* Main content area */
+#app-content {
+    background-color: var(--background) !important;
+}
+
+/* Headings */
+h1, h2, h3, h4, h5, h6 {
+    color: var(--text-primary) !important;
+}
+
+/* Selection */
+::selection {
+    background: var(--selection-bg);
+    color: var(--selection-text);
+}