feat: add dark theme support

app/components/ui-lib.module.scss

@@ -0,0 +1,58 @@
+.card {
+  background-color: var(--white);
+  border-radius: 10px;
+  box-shadow: var(--card-shadow);
+  padding: 10px;
+}
+
+.popover {
+  position: relative;
+}
+
+.popover-content {
+  position: absolute;
+  animation: slide-in 0.3s ease;
+  right: 0;
+  top: calc(100% + 10px);
+}
+
+.popover-mask {
+  position: fixed;
+  top: 0;
+  left: 0;
+  width: 100vw;
+  height: 100vh;
+}
+
+@keyframes slide-in {
+  from {
+    transform: translateY(10px);
+    opacity: 0;
+  }
+  to {
+    transform: translateY(0);
+    opacity: 1;
+  }
+}
+
+.list-item {
+  display: flex;
+  justify-content: space-between;
+  align-items: center;
+  min-height: 40px;
+  border-bottom: var(--border-in-light);
+  padding: 10px 20px;
+  animation: slide-in ease 0.6s;
+}
+
+.list {
+  border: var(--border-in-light);
+  border-radius: 10px;
+  box-shadow: var(--card-shadow);
+  margin-bottom: 20px;
+  animation: slide-in ease 0.3s;
+}
+
+.list .list-item:last-child {
+  border: 0;
+}