refactor: use nuxt compatiable 4 folder

app/styles/index.scss

@@ -0,0 +1,65 @@
+@use './animation.scss';
+// markdown
+@use './markdown.scss';
+
+html,
+body,
+#app {
+  height: 100%;
+  margin: 0;
+  padding: 0;
+
+  background: var(--c-bg);
+}
+
+input:focus {
+  outline: none;
+}
+
+#nprogress {
+  pointer-events: none;
+}
+
+#nprogress .bar {
+  background: rgb(13, 148, 136);
+  opacity: 0.75;
+  position: fixed;
+  z-index: 1031;
+  top: 0;
+  left: 0;
+  width: 100%;
+  height: 2px;
+}
+
+html {
+  color: var(--c-text);
+  background-color: var(--c-bg);
+
+  scroll-behavior: smooth;
+
+  -webkit-font-smoothing: antialiased;
+  -webkit-tap-highlight-color: transparent;
+}
+
+a {
+  color: var(--c-text);
+}
+
+button {
+  outline: none;
+
+  &:focus,
+  &:active {
+    outline: none;
+  }
+}
+
+hr {
+  opacity: 0.1;
+}
+
+.tag {
+  margin: 4px;
+  padding: 2px 4px;
+  // border: 1px solid var(--c-text);
+}