Update tools

Author: Magicherry

src/components/About/Toolstack.js

@@ -9,7 +9,7 @@ const toolStackIcons = [
     { icon: <img src="https://cdn.jsdelivr.net/gh/devicons/devicon@latest/icons/vscode/vscode-original.svg" alt="VS Code" style={{ width: "1em", height: "1em" }} />, name: "Visual Studio Code", link: "https://code.visualstudio.com/" },
     { icon: <img src="https://cdn.jsdelivr.net/gh/devicons/devicon@latest/icons/jetbrains/jetbrains-original.svg" alt="JetBrains" style={{ width: "1em", height: "1em" }} />, name: "JetBrains", link: "https://www.jetbrains.com/" },
     { icon: <img src="https://cdn.simpleicons.org/claude/CC785C" alt="Claude Code" style={{ width: "1em", height: "1em" }} />, name: "Claude Code", link: "https://www.anthropic.com/claude-code" },
-    { icon: <img src="https://cdn.jsdelivr.net/npm/simple-icons@latest/icons/openai.svg" alt="Codex" style={{ width: "1em", height: "1em" }} />, name: "Codex", link: "https://developers.openai.com/codex" },
+    { icon: <img src="https://cdn.jsdelivr.net/npm/simple-icons@latest/icons/openai.svg" alt="Codex" className="tech-icon-codex" style={{ width: "1em", height: "1em" }} />, name: "Codex", link: "https://developers.openai.com/codex" },
     { icon: <img src="https://www.zerotier.com/wp-content/uploads/2024/10/icon.svg" alt="ZeroTier" style={{ width: "1em", height: "1em" }} />, name: "ZeroTier", link: "https://www.zerotier.com/" },
     { icon: <img src="https://tailscale.com/favicon.svg" alt="Tailscale" style={{ width: "1em", height: "1em" }} />, name: "Tailscale", link: "https://tailscale.com/" },
     { icon: <img src="https://cdn.jsdelivr.net/gh/jellyfin/jellyfin-ux@master/branding/SVG/icon-transparent.svg" alt="Jellyfin" style={{ width: "1em", height: "1em" }} />, name: "Jellyfin", link: "https://jellyfin.org/" },

src/css/style.css

@@ -2869,6 +2869,11 @@ body.homepage .home-about-section {
     filter: brightness(1.5) contrast(1.2);
 }
 
+/* OpenAI (Codex) simple-icon is dark; invert in dark theme for contrast on skill cards */
+[data-theme="dark"] .tech-icons__icon img.tech-icon-codex {
+    filter: invert(1);
+}
+
 .tech-icons__name {
     font-size: 1.05rem;
     font-weight: 600;