Add themes and clean main.js and style.css

main.js

@@ -65,10 +65,10 @@ app.on('window-all-closed', () => {
     }
 })
 
+///////////////// SAVING AND LOADING /////////////////
 ipcMain.handle('save-path', (event, path) => {
     saveSilksongPath(path)
 });
-
 function saveSilksongPath(path) {
     silksongPath = path;
     bepinexFolderPath = `${silksongPath}/BepInEx`
@@ -84,19 +84,6 @@ ipcMain.handle('load-path', () => {
     return silksongPath;
 });
 
-ipcMain.handle('load-nexus-api', () => {
-    nexusAPI = store.get('nexus-api');
-    if (nexusAPI == undefined)  {
-        return "";
-    }
-    return nexusAPI;
-});
-
-ipcMain.handle('save-nexus-api', (event, api) => {
-    nexusAPI = api;
-    createNexus()
-    store.set('nexus-api', nexusAPI);
-});
 
 function saveBepinexVersion(version) {
     bepinexVersion = version;
@@ -107,6 +94,12 @@ function saveBepinexVersion(version) {
     store.set('bepinex-version', version);
 };
 
+ipcMain.handle('load-bepinex-version', () => {
+    bepinexVersion = store.get('bepinex-version');
+    return bepinexVersion;
+});
+
+
 function saveBepinexBackupVersion(version) {
     bepinexBackupVersion = version;
     if (bepinexBackupVersion == undefined) {
@@ -116,16 +109,41 @@ function saveBepinexBackupVersion(version) {
     store.set('bepinex-backup-version', version);
 };
 
-ipcMain.handle('load-bepinex-version', () => {
-    bepinexVersion = store.get('bepinex-version');
-    return bepinexVersion;
-});
-
 ipcMain.handle('load-bepinex-backup-version', () => {
     bepinexBackupVersion = store.get('bepinex-backup-version');
     return bepinexBackupVersion;
 });
  
+ipcMain.handle('save-nexus-api', (event, api) => {
+    nexusAPI = api;
+    createNexus()
+    store.set('nexus-api', nexusAPI);
+});
+
+ipcMain.handle('load-nexus-api', () => {
+    nexusAPI = store.get('nexus-api');
+    if (nexusAPI == undefined)  {
+        return "";
+    }
+    return nexusAPI;
+});
+
+
+ipcMain.handle('save-theme', (event, theme) => {
+    store.set('theme', theme);
+});
+
+ipcMain.handle('load-theme', () => {
+    theme = store.get('theme');
+    if (theme == undefined)  {
+        return "Silksong";
+    }
+    return theme;
+});
+
+//////////////////////////////////////////////////////
+/////////////////// DATA HANDLING ////////////////////
+
 async function fileExists(filePath) {
     try {
         await fs.access(filePath);
@@ -135,15 +153,17 @@ async function fileExists(filePath) {
     }
 }
 
-ipcMain.handle('file-exists', async (_, filePath) => {
-    return await fileExists(filePath);
-});
-
 ipcMain.handle('delete-data', async () => {
+    if (await fileExists(dataPath)) {
         await fs.unlink(dataPath)
+    }
 });
 
 ipcMain.handle('export-data', async () => {
+    if (!await fileExists(dataPath)) {
+        return
+    }
+
     const { canceled, filePath } = await dialog.showSaveDialog({
         title: 'Export Data',
         defaultPath: 'config.json',
@@ -173,31 +193,8 @@ ipcMain.handle('import-data', async () => {
     return true
 })
 
-ipcMain.handle('open-link', async (event, link) => {
-    await shell.openExternal(link)
-})
-
-ipcMain.handle('launch-game', async (event, mode) => {
-    const silksongExecutablePath = `${silksongPath}/Hollow Knight Silksong.exe`
-    if (mode === "modded"){
-        if (await fileExists(bepinexFolderPath)) {
-            await shell.openExternal(silksongExecutablePath)
-        }
-        else {
-            await installBepinex()
-            await shell.openExternal(silksongExecutablePath)
-        }
-    }
-    if (mode === "vanilla"){
-        if (await fileExists(bepinexFolderPath)) {
-            await backupBepinex()
-            await shell.openExternal(silksongExecutablePath)
-        }
-        else {
-            await shell.openExternal(silksongExecutablePath)
-        }
-    }
-})
+//////////////////////////////////////////////////////
+////////////////////// BEPINEX ///////////////////////
 
 async function installBepinex() {
     if (await fileExists(bepinexBackupPath)) {
@@ -308,6 +305,9 @@ ipcMain.handle('delete-bepinex-backup', async () => {
     }
 })
 
+//////////////////////////////////////////////////////
+/////////////////////// NEXUS ////////////////////////
+
 async function createNexus() {
     if (nexusAPI == undefined) {
         return
@@ -366,6 +366,9 @@ ipcMain.handle('download-mod', async (event, link) => {
     nexusWindow.loadURL(link)
 })
 
+//////////////////////////////////////////////////////
+//////////////////// UNCATEGORIZE ////////////////////
+
 ipcMain.handle('auto-detect-game-path', async () => {
     const defaultsSilksongPaths = [
         ":/Program Files (x86)/Steam/steamapps/common/Hollow Knight Silksong",
@@ -385,3 +388,29 @@ ipcMain.handle('auto-detect-game-path', async () => {
 ipcMain.handle('load-main-page', () => {
     mainWindow.loadFile("renderer/index.html")
 })
+
+ipcMain.handle('open-link', async (event, link) => {
+    await shell.openExternal(link)
+})
+
+ipcMain.handle('launch-game', async (event, mode) => {
+    const silksongExecutablePath = `${silksongPath}/Hollow Knight Silksong.exe`
+    if (mode === "modded"){
+        if (await fileExists(bepinexFolderPath)) {
+            await shell.openExternal(silksongExecutablePath)
+        }
+        else {
+            await installBepinex()
+            await shell.openExternal(silksongExecutablePath)
+        }
+    }
+    if (mode === "vanilla"){
+        if (await fileExists(bepinexFolderPath)) {
+            await backupBepinex()
+            await shell.openExternal(silksongExecutablePath)
+        }
+        else {
+            await shell.openExternal(silksongExecutablePath)
+        }
+    }
+})

preload.js

@@ -7,7 +7,6 @@ contextBridge.exposeInMainWorld('versions', {
 });
 
 contextBridge.exposeInMainWorld('files', {
-    fileExists: (path) => ipcRenderer.invoke('file-exists', path),
     delete: () => ipcRenderer.invoke('delete-data'),
     export: () => ipcRenderer.invoke('export-data'),
     import: () => ipcRenderer.invoke('import-data'),
@@ -18,7 +17,9 @@ contextBridge.exposeInMainWorld('files', {
     loadBepinexVersion: () => ipcRenderer.invoke('load-bepinex-version'),
     loadBepinexBackupVersion: () => ipcRenderer.invoke('load-bepinex-backup-version'),
     saveNexusAPI: (api) => ipcRenderer.invoke('save-nexus-api', api),
-    loadNexusAPI: () => ipcRenderer.invoke('load-nexus-api')
+    loadNexusAPI: () => ipcRenderer.invoke('load-nexus-api'),
+    saveTheme: (theme) => ipcRenderer.invoke('save-theme', theme),
+    loadTheme: () => ipcRenderer.invoke('load-theme')
 });
 
 contextBridge.exposeInMainWorld('electronAPI', {

renderer/index.html

@@ -9,42 +9,40 @@
 
     <div class="app">
 
-        <video autoplay muted loop id="menu_wallpaper" class="background_video">
-            <source src="assets/background.mp4" type="video/mp4">
-        </video>
+        <video autoplay muted loop class="background-video" id="background-video" src="assets/background/Silksong.mp4" type="video/mp4"></video>
 
         <!-- Sidebar -->
         <aside class="sidebar">
             <div class="logo" onclick="navigate('home')">
-                <img src="assets/logo.png" alt="Silk Fly Launcher Logo" class="logo_img"/>
-                <h5 class="logo_title">Silk Fly Launcher</h1>
+                <img src="assets/logo.png" alt="Silk Fly Launcher Logo" class="logo-img"/>
+                <h5 class="logo-title">Silk Fly Launcher</h1>
             </div>
 
             <nav class="nav">
                 <div class="nav-section">
                     <span class="nav-title">Execute Silksong</span>
                     <button onclick="launch('vanilla')">
-                        <img src="vanilla_launch_icon.png" class="button_icon"/>
+                        <img src="vanilla_launch_icon.png" class="button-icon"/>
                         Run Vanilla
                     <button onclick="launch('modded')">
-                        <img src="modded_launch_icon.png" class="button_icon"/>
+                        <img src="modded_launch_icon.png" class="button-icon"/>
                         Run Modded
                 </div>
 
                 <div class="nav-section">
                     <span class="nav-title">Mods</span>
                     <button onclick="navigate('mods-installed')">
-                        <img src="installed_mods_icon.png" class="button_icon"/>
+                        <img src="installed_mods_icon.png" class="button-icon"/>
                         Installed
                     <button onclick="navigate('mods-online')">
-                        <img src="online_mods_icon.png" class="button_icon"/>
+                        <img src="online_mods_icon.png" class="button-icon"/>
                         Online
                 </div>
 
                 <div class="nav-section">
                     <span class="nav-title">Settings</span>
                     <button onclick="navigate('general-settings')">
-                        <img src="general_settings_icon.png" class="button_icon"/>
+                        <img src="general_settings_icon.png" class="button-icon"/>
                         General
                 </div>
             </nav>
@@ -90,9 +88,9 @@
                 <p id="mod-description">No description provided</p>
                 <p class="transparent-text" id="mod-version">V1.0.0 last update on 01/01/2026</p>
 
-                <div class="mod-actions">
-                    <a href="https://google.com" class="default-button" id="download-mod-button">Download</a>
-                    <a href="https://google.com" class="default-button" id="external-link">Website</a>
+                <div class="horizontal-div">
+                    <a href="www.nexusmods.com/hollowknightsilksong/mods" class="default-button" id="download-mod-button">Download</a>
+                    <a href="www.nexusmods.com/hollowknightsilksong/mods" class="default-button" id="external-link">Website</a>
                 </div>
             </div>
 
@@ -107,6 +105,21 @@
             <input type="text" class="input" id="silksong-path-input" name="silksong-path-input">
             <button class="default-button" onclick="autoDetectGamePath()">Auto Detect</button>
         </div>
+        <div class="horizontal-div">
+            <label for="silksong-path-label">Themes: </label>
+            <div class="themes-div">
+                <div class="default-button longer-button" id="themes-button" onclick="toggleThemesMenu()">Silksong</div>
+                <div class="themes-menu longer-button" id="themes-menu">
+                    <li onclick="changeTheme('Silksong')">Silksong</li>
+                    <li onclick="changeTheme('Citadel of song')">Citadel of song (WIP)</li>
+                    <li onclick="changeTheme('Cradle')">Cradle (WIP)</li>
+                    <li onclick="changeTheme('Abyss')">Abyss (WIP)</li>
+                    <li onclick="changeTheme('Greyroot')">Greyroot (WIP)</li>
+                    <li onclick="changeTheme('Surface')">Surface (WIP)</li>
+                    <li onclick="changeTheme('Steel')">Steel (WIP)</li>
+                </div>
+            </div>
+        </div>
         <br>
         <h2>BepInEx</h2>
         <p class="transparent-text" id="bepinex-version-text"></p>

renderer/renderer.js

@@ -9,7 +9,12 @@ const modTemplate = document.getElementById("mod-template");
 
 const versionText = HomeTemplate.content.getElementById("version-text");
 
-navigate("home")
+on_startup()
+
+async function on_startup() {
+    changeTheme(await files.loadTheme())
+    navigate("home")
+}
 
 async function navigate(page) {
     view.replaceChildren()
@@ -105,17 +110,18 @@ async function navigate(page) {
             silksongPathInput.value = await files.loadSilksongPath()
             silksongPathInput.addEventListener('input', async function(event) {
                 let silksongPath = silksongPathInput.value
-                await files.saveSilksongPath(silksongPath)
+                files.saveSilksongPath(silksongPath)
             });
 
             nexusAPIInput.value = await files.loadNexusAPI()
             nexusAPIInput.addEventListener('input', async function(event) {
                 let nexusAPI = nexusAPIInput.value
-                await files.saveNexusAPI(nexusAPI)
+                files.saveNexusAPI(nexusAPI)
             });
 
             view.appendChild(settingsTemplateCopy)
             setBepinexVersion()
+            setThemeButton()
             verifyNexusAPI()
             break;
     }
@@ -135,6 +141,8 @@ async function autoDetectGamePath() {
 }
 
 async function deleteData() {
+    changeTheme("Silksong")
+    toggleThemesMenu()
     await files.delete()
     document.getElementById("silksong-path-input").value = await files.loadSilksongPath()
     document.getElementById("nexus-api-input").value = await files.loadNexusAPI()
@@ -148,6 +156,8 @@ async function importData() {
     await files.import()
     document.getElementById("silksong-path-input").value = await files.loadSilksongPath()
     document.getElementById("nexus-api-input").value = await files.loadNexusAPI()
+    changeTheme(await files.loadTheme())
+    toggleThemesMenu()
 }
 
 async function installBepinex() {
@@ -206,3 +216,42 @@ async function verifyNexusAPI() {
         nexusCheckImage.src = "assets/cross.svg"
     }
 }
+
+function toggleThemesMenu() {
+    const themesMenu = document.getElementById("themes-menu")
+    if (themesMenu) {
+        themesMenu.classList.toggle("show")
+    }
+}
+
+async function setThemeButton() {
+    const themesButton = document.getElementById("themes-button")
+    if (themesButton) {
+        themesButton.textContent = await files.loadTheme()
+    }
+}
+
+function changeTheme(theme) {
+    files.saveTheme(theme)
+
+    setThemeButton()
+
+    const themesColors = {
+        "var":             ["--primary-color", "--secondary-color", "--background-color"],
+        "Silksong":        ["rgba(255, 25,  0,   0.3)", "#ff6b6b", "rgba(255, 72,  0,   0.2)"],
+        "Citadel of song": ["rgba(160, 116, 89,  0.3)", "#d3ba91", "rgba(123, 102, 93,  0.2)"],
+        "Cradle":          ["rgba(123, 136, 255, 0.3)", "#7c9fea", "rgba(61,  88,  150, 0.2)"],
+        "Abyss":           ["rgba(255, 255, 255, 0.3)", "#ececec", "rgba(255, 255, 255, 0.2)"],
+        "Greyroot":        ["rgba(181, 255, 180, 0.3)", "#c1ffcd", "rgba(90,  165, 130, 0.2)"],
+        "Surface":         ["rgba(75,  120, 255, 0.3)", "#87c3ff", "rgba(42,  107, 203, 0.2)"],
+        "Steel":           ["rgba(164, 164, 164, 0.3)", "#c5b9b9", "rgba(255, 255, 255, 0.2)"]
+    }
+    for(let i = 0; i < 3; i++) {
+        document.documentElement.style.setProperty(themesColors.var[i], themesColors[theme][i])
+    }
+
+    const backgroundVideo = document.getElementById("background-video")
+    backgroundVideo.src = `assets/background/${theme}.mp4`
+
+    toggleThemesMenu()
+}

renderer/style.css

@@ -1,11 +1,21 @@
 * {
     margin: 0;
-    padding: 0;
     box-sizing: border-box;
     font-family: "Segoe UI", sans-serif;
     cursor: url("assets/cursor.png") 0 0, auto !important;
 }
 
+:root {
+    --primary-color: rgba(255, 25, 0, 0.3);
+    --secondary-color: #ff6b6b;
+    --background-color: rgba(255, 72, 0, 0.2);
+
+    --text-color: #eee;
+    --transparent-black: rgba(0, 0, 0, 0.4);
+    --darker-transparent-black: rgba(0, 0, 0, 0.8);
+    --transparent-grey: rgba(30, 30, 30, 0.8)
+}
+
 body {
     background: black;
     color: #eee;
@@ -18,7 +28,7 @@ body {
     height: 100vh;
 }
 
-.background_video {
+.background-video {
     position: fixed;
     top: 0;
     left: 0;
@@ -31,8 +41,8 @@ body {
 
 .sidebar {
     width: 280px;
-    background: rgba(0, 0, 0, 0.8);
-    border-right: 1px solid rgba(255, 0, 0, 0.15);
+    background: var(--darker-transparent-black);
+    border-right: 1px solid var(--background-color);
     display: flex;
     flex-direction: column;
 }
@@ -43,18 +53,16 @@ body {
     align-items: center;
     justify-content: center;
     font-size: 32px;
-    cursor: pointer;
-    border-bottom: 1px solid rgba(255, 72, 0, 0.2);
-    transition: background 0.2s;
+    border-bottom: 1px solid var(--background-color);
+    transition: background 0.2s ease;
 }
 
 .logo:hover {
-    background: rgba(255, 0, 0, 0.08);
+    background: var(--background-color);
 }
 
-.logo_img {
+.logo-img {
     height: 50px;
-    width: auto;
 }
 
 .nav {
@@ -70,11 +78,11 @@ body {
     font-size: 13px;
     text-transform: uppercase;
     letter-spacing: 1px;
-    color: #fff;
+    color: var(--text-color);
     margin-bottom: 10px;
 
     padding: 0 4px 4px;
-    border-bottom: 1px solid #ff6b6b;    
+    border-bottom: 1px solid var(--secondary-color);    
 }
 
 .nav button {
@@ -82,17 +90,16 @@ body {
     padding: 10px 14px;
     margin-bottom: 8px;
     background: transparent;
-    border: 1px solid black;
+    border: 1px solid transparent;
     border-radius: 4px;
-    color: #eee;
-    cursor: pointer;
+    color: var(--text-color);
     text-align: left;
     transition: all 0.2s ease;
 }
 
 .nav button:hover {
-    background: rgba(255, 72, 0, 0.2);
-    border-color: rgba(255, 25, 0, 0.3);
+    background: var(--background-color);
+    border-color: var(--primary-color);
 }
 
 .content {
@@ -103,7 +110,7 @@ body {
 .content h1 {
     font-size: 28px;
     margin-bottom: 20px;
-    color: #ffffff;
+    color: var(--text-color);
     display: flex;
     justify-content: center;
 }
@@ -111,19 +118,18 @@ body {
 .content h2 {
     font-size: 24px;
     margin-bottom: 20px;
-    color: #ffffff;
+    color: var(--text-color);
     padding: 0 4px 4px;
-    border-bottom: 1px solid #ff6b6b; 
+    border-bottom: 1px solid var(--secondary-color); 
 }
 
 .view {
-    width: 100%;
-    background: rgba(0, 0, 0, 0.8);
+    background: var(--darker-transparent-black);
     border-radius: 12px;
     padding: 40px;
     position: relative;
     z-index: 0;
-    box-shadow: 0 0 50px rgba(0, 0, 0, 0.15);
+    box-shadow: 0 0 50px var(--darker-transparent-black);
     overflow: auto;
     height: 90%; 
 }
@@ -139,35 +145,33 @@ body {
     flex: 1;
     height: 30px;
     padding: 0 12px;
-    background: rgba(0, 0, 0, 0.4);
-    border: 1px solid #ff6b6b;
+    background: var(--transparent-black);
+    border: 1px solid var(--secondary-color);
     border-radius: 4px;
-    color: #eee;
+    color: var(--text-color);
     font-size: 13px;
     outline: none;
     transition: all 0.2s ease;
 }
 
 .input:hover {
-    background: rgba(0, 0, 0, 0.55);
-    border-color: rgba(255, 25, 0, 0.3);
+    background: var(--darker-transparent-black);
+    border-color: var(--primary-color);
 }
 
 .input:focus {
-    background: rgba(0, 0, 0, 0.65);
-    border-color: rgba(255, 25, 0, 0.3);
-    box-shadow: 0 0 0 1px rgba(255, 25, 0, 0.2);
+    background: var(--darker-transparent-black);
+    border-color: var(--primary-color);
+    box-shadow: 0 0 0 1px var(--primary-color);
 }
 
 .default-button {
     width: 120px;
     height: 40px;
-    padding: 2px;
-    background: rgba(0, 0, 0, 0.4);
-    border: 1px solid #ff6b6b;
+    background: var(--transparent-black);
+    border: 1px solid var(--secondary-color);
     border-radius: 4px;
-    color: #eee;
-    cursor: pointer;
+    color: var(--text-color);
     font-size: 16px;
     transition: all 0.2s ease;
     display: flex;
@@ -176,19 +180,17 @@ body {
 }
 
 .default-button:hover {
-    background: rgba(255, 72, 0, 0.2);
-    border-color: rgba(255, 25, 0, 0.3);
+    background: var(--background-color);
+    border-color: var(--primary-color);
 }
 
 .important-button {
     width: 120px;
     height: 40px;
-    padding: 2px;
     background: rgba(100, 0, 0, 0.4);
     border: 1px solid rgba(200, 25, 0);
     border-radius: 4px;
-    color: #eee;
-    cursor: pointer;
+    color: var(--text-color);
     font-size: 16px;
     transition: all 0.2s ease;
     display: flex;
@@ -208,6 +210,10 @@ body {
     font-size: 32px;
 }
 
+.longer-button {
+    width: 240px;
+}
+
 .search-container {
     position: absolute;
     left: 50%;
@@ -221,7 +227,7 @@ body {
     border: none;
     border-radius: 50px;
     background-color: rgba(255, 255, 255, 0.15);
-    color: #fff;
+    color: var(--text-color);
     outline: none;
     transition: background 0.3s, width 0.3s;
 }
@@ -238,20 +244,15 @@ body {
     transform: translateY(-50%);
     background: none;
     border: none;
-    color: #fff;
+    color: var(--text-color);
     font-size: 18px;
     cursor: pointer;
 }
 
 .mods-container {
-    width: 100%;
     height: 80%;
     transform: translateY(50px);
-    background: rgba(30, 30, 30, 0.8);
-    border-radius: 12px;
     padding: 20px;
-    position: relative;
-    box-shadow: 0 0 50px rgba(30, 30, 30, 0.15);
     overflow: auto;
 }
 
@@ -262,12 +263,10 @@ body {
     display: flex;
     align-items: center;
     justify-content: space-between;
-
 }
 
 .mod-container:not(:last-child) {
-    border-bottom: 1px solid rgba(150, 25, 0, 0.5);
-
+    border-bottom: 1px solid var(--secondary-color);
 }
 
 .mod-text {
@@ -275,17 +274,10 @@ body {
     flex-direction: column;
 }
 
-.mod-actions {
-    margin-top: 12px;
-    display: flex;
-    gap: 20px;
-}
-
 .mod-icon {
     width: 128px;
     height: 128px;
     object-fit: contain;
-    opacity: 0.9;
 }
 
 ::-webkit-scrollbar {
@@ -293,16 +285,17 @@ body {
 }
 
 ::-webkit-scrollbar-track {
-    background: #101010;
+    background: var(--transparent-grey);
+    border-radius: 5px;
 }
 
 ::-webkit-scrollbar-thumb {
-    background: rgb(120, 25, 0);
-    border-radius: 7px;
+    background: var(--primary-color);
+    border-radius: 5px;
 }
 
 ::-webkit-scrollbar-thumb:hover {
-    background: rgb(170, 25, 0);
+    background: var(--secondary-color);
 }
 
 .transparent-text {
@@ -316,10 +309,36 @@ body {
 }
 
 .link {
-    color: #ffffff;
+    color: var(--text-color);
     transition: all 0.2s ease;
 }
 
 .link:hover {
-    color: #ff6b6b;
+    color: var(--secondary-color);
+}
+
+.themes-div {
+    position: relative;
+}
+
+.themes-menu {
+    display: none;
+    position: absolute;
+    background: var(--darker-transparent-black);
+    border: 1px solid var(--secondary-color);
+    border-radius: 4px;
+}
+
+.themes-menu.show {
+    display: block;
+}
+
+.themes-menu li {
+    padding: 6px;
+    display: flex;
+    justify-content: center;
+}
+
+.themes-menu li:hover {
+    background: var(--background-color);
 }

renderer/welcome.css

@@ -1,17 +1,15 @@
 .welcome-div {
     display: flex;
     flex-direction: column;
-    height: 100%;
     flex: 1;
     padding: 0 60px;
 }
 
 .title {
     display: flex;
-    flex: 1;
     font-size: 60px;
     margin-bottom: 60px;
-    color: #ffffff;
+    color: #eee;
     justify-content: center;
 }
 
@@ -20,6 +18,4 @@
     flex: 2;
     align-items: center;
     justify-content: space-between;
-    margin-top: 8px;
-    gap: 40px;
 }

renderer/welcome.html

@@ -8,9 +8,7 @@
 </head>
 <body>
     <div class="app">
-        <video autoplay muted loop id="menu_wallpaper" class="background_video">
-            <source src="assets/background.mp4" type="video/mp4">
-        </video>
+        <video autoplay muted loop class="background-video" id="background-video" src="assets/background/Silksong.mp4" type="video/mp4"></video>
 
         <div class="welcome-div" id="main-div">
             <br>
@@ -59,6 +57,21 @@
 
     <template id="style-template">
         <h1 class="title">Chose the theme of the app</h1>
+        <div class="horizontal-div welcome-div">
+            <label for="silksong-path-label">Themes: </label>
+            <div class="themes-div">
+                <div class="default-button longer-button" id="themes-button" onclick="toggleThemesMenu()">Silksong</div>
+                <div class="themes-menu longer-button" id="themes-menu">
+                    <li onclick="changeTheme('Silksong')">Silksong</li>
+                    <li onclick="changeTheme('Citadel of song')">Citadel of song (WIP)</li>
+                    <li onclick="changeTheme('Cradle')">Cradle (WIP)</li>
+                    <li onclick="changeTheme('Abyss')">Abyss (WIP)</li>
+                    <li onclick="changeTheme('Greyroot')">Greyroot (WIP)</li>
+                    <li onclick="changeTheme('Surface')">Surface (WIP)</li>
+                    <li onclick="changeTheme('Steel')">Steel (WIP)</li>
+                </div>
+            </div>
+        </div>
     </template>
 
     <template id="tutorial-template">

renderer/welcome.js

@@ -110,3 +110,42 @@ async function importData() {
         electronAPI.loadMainPage()
     }
 }
+
+function toggleThemesMenu() {
+    const themesMenu = document.getElementById("themes-menu")
+    if (themesMenu) {
+        themesMenu.classList.toggle("show")
+    }
+}
+
+async function setThemeButton() {
+    const themesButton = document.getElementById("themes-button")
+    if (themesButton) {
+        themesButton.textContent = await files.loadTheme()
+    }
+}
+
+function changeTheme(theme) {
+    files.saveTheme(theme)
+
+    setThemeButton()
+
+    const themesColors = {
+        "var":             ["--primary-color", "--secondary-color", "--background-color"],
+        "Silksong":        ["rgba(255, 25,  0,   0.3)", "#ff6b6b", "rgba(255, 72,  0,   0.2)"],
+        "Citadel of song": ["rgba(160, 116, 89,  0.3)", "#d3ba91", "rgba(123, 102, 93,  0.2)"],
+        "Cradle":          ["rgba(123, 136, 255, 0.3)", "#7c9fea", "rgba(61,  88,  150, 0.2)"],
+        "Abyss":           ["rgba(255, 255, 255, 0.3)", "#ececec", "rgba(255, 255, 255, 0.2)"],
+        "Greyroot":        ["rgba(181, 255, 180, 0.3)", "#c1ffcd", "rgba(90,  165, 130, 0.2)"],
+        "Surface":         ["rgba(75,  120, 255, 0.3)", "#87c3ff", "rgba(42,  107, 203, 0.2)"],
+        "Steel":           ["rgba(164, 164, 164, 0.3)", "#c5b9b9", "rgba(255, 255, 255, 0.2)"]
+    }
+    for(let i = 0; i < 3; i++) {
+        document.documentElement.style.setProperty(themesColors.var[i], themesColors[theme][i])
+    }
+    
+    const backgroundVideo = document.getElementById("background-video")
+    backgroundVideo.src = `assets/background/${theme}.mp4`
+
+    toggleThemesMenu()
+}