Add a basic popup

src/routes/Installs.css

@@ -0,0 +1,35 @@
+@import 'tailwindcss';
+
+@keyframes fadeIn {
+  from {
+    opacity: 0;
+  }
+  to {
+    opacity: 1;
+  }
+}
+
+@keyframes fadeOut {
+  from {
+    opacity: 1;
+  }
+  to {
+    opacity: 0;
+  }
+}
+
+.popup-overlay {
+  @apply fixed w-screen h-screen z-[9999] flex justify-center items-center animate-[fadeIn_0.2s_ease-out_forwards] left-0 top-0 bg-[rgba(0,0,0,0.5)];
+}
+
+.popup-overlay.fade-out {
+  @apply animate-[fadeOut_0.2s_ease-out_forwards];
+}
+
+.popup-box {
+  @apply relative w-[85vw] h-[80vh] shadow-[0_0_20px_rgba(0,0,0,0.2)] overflow-auto p-6 rounded-lg bg-[#191919];
+}
+
+.close-button {
+  @apply flex justify-center items-center absolute bg-[#363636] hover:bg-[#484848] text-2xl cursor-pointer text-gray-300 hover:text-white h-12 w-12 p-3 rounded-xl border-[none] left-2 top-2 transition-colors;
+}