Fix theme toggle CSS and add data-theme attribute handling

docker/resume/styles.css

@@ -9,6 +9,7 @@
     --theme-hover: #e0e0e0;
 }
 
+/* Dark theme variables when system prefers dark mode (auto setting) */
 @media (prefers-color-scheme: dark) {
     :root {
         --bg-color: #1a1a1a;
@@ -22,6 +23,30 @@
     }
 }
 
+/* Light theme variables when manually selected */
+html[data-theme='light'] {
+    --bg-color: #ffffff;
+    --text-color: #333333;
+    --accent-color: #0066cc;
+    --border-color: #e0e0e0;
+    --hover-color: #0052a3;
+    --theme-bg: #f5f5f5;
+    --theme-border: #ddd;
+    --theme-hover: #e0e0e0;
+}
+
+/* Dark theme variables when manually selected */
+html[data-theme='dark'] {
+    --bg-color: #1a1a1a;
+    --text-color: #e0e0e0;
+    --accent-color: #4d9fff;
+    --border-color: #404040;
+    --hover-color: #66b3ff;
+    --theme-bg: #2d2d2d;
+    --theme-border: #404040;
+    --theme-hover: #3d3d3d;
+}
+
 body {
     font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
     line-height: 1.6;
@@ -103,10 +128,14 @@ hr {
     margin: 2em 0;
 }
 
-#theme-toggle {
+.theme-switch {
     position: fixed;
     top: 20px;
     right: 20px;
+    z-index: 100;
+}
+
+#themeToggle {
     padding: 8px 16px;
     background-color: var(--theme-bg);
     border: 1px solid var(--theme-border);
@@ -117,7 +146,7 @@ hr {
     transition: background-color 0.3s ease;
 }
 
-#theme-toggle:hover {
+#themeToggle:hover {
     background-color: var(--theme-hover);
 }