Work on layout, modals, toast:

src/app.css

@@ -0,0 +1,45 @@
+@tailwind base;
+@tailwind components;
+@tailwind utilities;
+
+.button {
+  padding: 12px 16px;
+  display: flex;
+  border-radius: var(--rounded-btn, 0.5rem);
+  cursor: pointer;
+  animation: button-pop 200ms ease-out;
+  transition-property: all;
+  transition-timing-function: cubic-bezier(0.4, 0, 0.2, 1);
+  transition-duration: 150ms;
+}
+
+.button:active:hover, .button:active:focus {
+  animation: button-pop 0s ease-out;
+  transform: scale(var(--btn-focus-scale, 0.97));
+}
+
+[data-theme="dark"] {
+  --stark: #111;
+  --stark-content: #eee;
+}
+
+[data-theme="light"] {
+  --stark: #eee;
+  --stark-content: #111;
+}
+
+.text-stark {
+  color: var(--stark);
+}
+
+.text-stark-content {
+  color: var(--stark-content);
+}
+
+.bg-stark {
+  background-color: var(--stark);
+}
+
+.bg-stark-content {
+  background-color: var(--stark-content);
+}