Update style.css

style.css

@@ -17,6 +17,81 @@ body {
   font-family: "Roboto", sans-serif;
 }
 
+/* Definindo cores usando variáveis CSS */
+:root {
+    --background-color: #ffffff;
+    --text-color: #000000;
+    --header-background: #f1f1f1;
+}
+
+.dark-mode {
+    --background-color: #121212;
+    --text-color: #ffffff;
+    --header-background: #1e1e1e;
+}
+
+/* Estilo global usando variáveis */
+body {
+    background-color: var(--background-color);
+    color: var(--text-color);
+    font-family: Arial, sans-serif;
+    transition: background-color 0.3s ease, color 0.3s ease;
+}
+
+.navbar {
+    background-color: var(--header-background);
+    padding: 20px;
+    display: flex;
+    justify-content: space-between;
+    align-items: center;
+}
+
+/* Toggle switch for Dark Mode */
+.switch {
+    position: relative;
+    display: inline-block;
+    width: 60px;
+    height: 34px;
+}
+
+.switch input {
+    opacity: 0;
+    width: 0;
+    height: 0;
+}
+
+.slider {
+    position: absolute;
+    cursor: pointer;
+    top: 0;
+    left: 0;
+    right: 0;
+    bottom: 0;
+    background-color: #ccc;
+    transition: .4s;
+    border-radius: 34px;
+}
+
+.slider:before {
+    position: absolute;
+    content: "";
+    height: 26px;
+    width: 26px;
+    left: 4px;
+    bottom: 4px;
+    background-color: white;
+    transition: .4s;
+    border-radius: 50%;
+}
+
+input:checked + .slider {
+    background-color: #2196F3;
+}
+
+input:checked + .slider:before {
+    transform: translateX(26px);
+}
+
 ::selection {
   background: #9f526430;
 }