addet some content

www/assets/css/common/footer.css

@@ -0,0 +1,60 @@
+.footer,
+.top-link {
+    font-size: 12px;
+    color: var(--secondary);
+}
+
+.footer {
+    max-width: calc(var(--main-width) + var(--gap) * 2);
+    margin: auto;
+    padding: calc((var(--footer-height) - var(--gap)) / 2) var(--gap);
+    text-align: center;
+    line-height: 24px;
+}
+
+.footer span {
+    margin-inline-start: 1px;
+    margin-inline-end: 1px;
+}
+
+.footer span:last-child {
+    white-space: nowrap;
+}
+
+.footer a {
+    color: inherit;
+    border-bottom: 1px solid var(--secondary);
+}
+
+.footer a:hover {
+    border-bottom: 1px solid var(--primary);
+}
+
+.top-link {
+    visibility: hidden;
+    position: fixed;
+    bottom: 60px;
+    right: 30px;
+    z-index: 99;
+    background: var(--tertiary);
+    width: 42px;
+    height: 42px;
+    padding: 12px;
+    border-radius: 64px;
+    transition: visibility 0.5s, opacity 0.8s linear;
+}
+
+.top-link,
+.top-link svg {
+    filter: drop-shadow(0px 0px 0px var(--theme));
+}
+
+.footer a:hover,
+.top-link:hover {
+    color: var(--primary);
+}
+
+.top-link:focus,
+#theme-toggle:focus {
+    outline: 0;
+}