more refactoring

frontend/src/style.css

@@ -798,6 +798,77 @@ textarea:focus {
 .btn-sm {
   padding: 6px 12px;
   font-size: 12px;
+  width: 100%;
+  justify-content: center;
+}
+
+/* Toast System */
+#toast-container {
+  position: fixed;
+  bottom: 24px;
+  right: 24px;
+  display: flex;
+  flex-direction: column;
+  gap: 12px;
+  z-index: 2000;
+}
+
+.toast {
+  min-width: 300px;
+  padding: 16px 20px;
+  border-radius: 12px;
+  background: var(--bg-sidebar);
+  border: 1px solid var(--glass-border);
+  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
+  display: flex;
+  align-items: center;
+  gap: 12px;
+  animation: slideIn 0.3s cubic-bezier(0.4, 0, 0.2, 1);
+}
+
+.toast.error {
+  border-left: 4px solid var(--status-failed);
+}
+
+.toast.success {
+  border-left: 4px solid var(--status-completed);
+}
+
+.toast.info {
+  border-left: 4px solid var(--primary);
+}
+
+.toast-icon {
+  font-size: 18px;
+}
+
+.toast-message {
+  font-size: 14px;
+  font-weight: 500;
+}
+
+@keyframes slideIn {
+  from {
+    transform: translateX(100%);
+    opacity: 0;
+  }
+
+  to {
+    transform: translateX(0);
+    opacity: 1;
+  }
+}
+
+@keyframes fadeOut {
+  from {
+    opacity: 1;
+    transform: scale(1);
+  }
+
+  to {
+    opacity: 0;
+    transform: scale(0.95);
+  }
 }
 
 .logout-btn {