Refactor

.gitignore

@@ -1,2 +1,3 @@
 *.html
 thumbnails/
+*.js

README.md

@@ -5,6 +5,7 @@ A place where to find gruvbox theme wallpapers.
 
 1. Fork the project.
 2. Add the wallpapers that you have in their respective folder.
+3. For light variants: Place the light-themed wallpapers in a light/ subfolder within the category.
 3. Make a pull request.
 
 > [!CAUTION]

app.js

@@ -1,60 +0,0 @@
-function loadPage(section, page) {
-    let buttons = document.getElementById(section).getElementsByTagName("button");
-    let currSel;
-    for (let i in buttons) {
-        if (buttons[i].classList?.contains("selected")) {
-            if (page - 1 == i) return;
-            else {
-                currSel = buttons[i];
-                break;
-            }
-        }
-    }
-
-    fetch(section + "_page" + page + ".html")
-        .then((response) => response.text())
-        .then((data) => {
-            document.getElementById(section + "-content").innerHTML = data;
-            if (currSel) {
-                currSel.classList.remove("selected");
-            }
-            document.getElementById(section).getElementsByTagName("button")[page - 1].classList.add("selected");
-        });
-}
-
-function activeSection(section) {
-    hideAll();
-
-    const targetSection = document.getElementById(section);
-    targetSection.focus();
-    targetSection.classList.add("selected");
-    setTimeout(() => {
-        targetSection.scrollIntoView({ block: "start", behavior: "smooth" });
-    }, 100);
-}
-
-function hideAll() {
-    document.querySelectorAll(".section").forEach((s) => {
-        s.classList.remove("selected");
-    });
-}
-const HIDDEN_CLASS = "hidden";
-
-function hideThemeSwitcher(currentTheme) {
-    if (currentTheme == "dark") {
-        document.getElementById("dark-icon")?.classList.add(HIDDEN_CLASS);
-        document.getElementById("light-icon")?.classList.remove(HIDDEN_CLASS);
-    } else {
-        document.getElementById("light-icon")?.classList.add(HIDDEN_CLASS);
-        document.getElementById("dark-icon")?.classList.remove(HIDDEN_CLASS);
-    }
-}
-function setTheme(newTheme) {
-    document.documentElement.style.setProperty("color-scheme", newTheme);
-    hideThemeSwitcher(newTheme);
-}
-
-function switchTheme() {
-    setTheme(document.documentElement.style.getPropertyValue("color-scheme")=="dark"?"light":"dark");
-}
-

build.sh

@@ -26,59 +26,206 @@ generate_thumbnails() {
   rm -rf thumbnails/*
   
   # Count total number of images
-  total_images=$(find ./wallpapers -type f | wc -l)
+  total_images=$(find ./wallpapers -type f \( -iname "*.jpg" -o -iname "*.jpeg" -o -iname "*.png" \) | wc -l)
   current_image=0
   
   for section_dir in ./wallpapers/*; do
     section_name="${section_dir##*/}"
     mkdir -p "thumbnails/$section_name"
     
+    # Process dark images (base directory)
     for img in "$section_dir"/*; do
+      [ -f "$img" ] || continue
+      case "$img" in
+        *.jpg|*.jpeg|*.png|*.JPG|*.JPEG|*.PNG) ;;
+        *) continue ;;
+      esac
+      
       current_image=$((current_image + 1))
       local img_filename="${img##*/}"
       local thumbnail="thumbnails/$section_name/$img_filename"
       echo "($current_image/$total_images): $img -> $thumbnail"
       convert "$img" -resize 300x300 "$thumbnail"
     done
+    
+    # Process light images if light folder exists
+    if [ -d "$section_dir/light" ]; then
+      mkdir -p "thumbnails/$section_name/light"
+      for img in "$section_dir/light"/*; do
+        [ -f "$img" ] || continue
+        case "$img" in
+          *.jpg|*.jpeg|*.png|*.JPG|*.JPEG|*.PNG) ;;
+          *) continue ;;
+        esac
+        
+        current_image=$((current_image + 1))
+        local img_filename="${img##*/}"
+        local thumbnail="thumbnails/$section_name/light/$img_filename"
+        echo "($current_image/$total_images): $img -> $thumbnail"
+        convert "$img" -resize 300x300 "$thumbnail"
+      done
+    fi
   done
   
   echo "Thumbnail generation complete: $total_images images processed"
 }
 
-write_section_header() {
-  echo "write section header ..."
-  echo "<h2 class='s$1 clickable' onclick='activeSection(\"$2\")' >" >>$3
-  echo "$2" | tr a-z A-Z >>$3
-  echo "</h2>" >>$3
+check_has_light_folder() {
+  local section_dir=$1
+  [ -d "$section_dir/light" ] && echo "true" || echo "false"
 }
 
-write_img() {
-  echo "write image ..."
-  # Remove leading './' from path if present
-  local img_path="${1#./}"
-  local section_name=$(echo "$img_path" | cut -d'/' -f2)
-  local img_filename="${1##*/}"
-  
-  # Use web-friendly paths (no leading ./)
-  local thumbnail_path="thumbnails/$section_name/$img_filename"
-  
-  echo "  <a target='_blank' href='$img_path'>
-<img loading='lazy' src='$thumbnail_path' alt='$img_filename' width='200'></a>" >>$2
+count_images_in_dir() {
+  local dir=$1
+  find "$dir" -maxdepth 1 -type f \( -iname "*.jpg" -o -iname "*.jpeg" -o -iname "*.png" \) | wc -l
 }
 
-rm *.html
+create_section_data() {
+  local section=$1
+  local subdir=$2
+  local maxPerPage=8
+  local has_light=$(check_has_light_folder "$subdir")
   
-touch ./index.html
+  echo "Creating data for section: $section"
   
-echo "<!DOCTYPE html>
+  # Create JSON data file for the section
+  local data_file="${section}_data.js"
+  
+  cat > "$data_file" << EOF
+// Data for $section section
+window.sectionData = window.sectionData || {};
+window.sectionData['$section'] = {
+  hasLight: $has_light,
+  maxPerPage: $maxPerPage,
+  dark: [
+EOF
+
+  # Generate dark images data
+  for wallpaper in "$subdir"/*; do
+    [ -f "$wallpaper" ] || continue
+    case "$wallpaper" in
+      *.jpg|*.jpeg|*.png|*.JPG|*.JPEG|*.PNG) ;;
+      *) continue ;;
+    esac
+    
+    local img_path="${wallpaper#./}"
+    local img_filename="${wallpaper##*/}"
+    local thumbnail_path="thumbnails/$section/$img_filename"
+    echo "    { src: '$img_path', thumb: '$thumbnail_path', alt: '$img_filename' }," >> "$data_file"
+  done
+
+  # Generate light images data if exists
+  echo "  ]," >> "$data_file"
+  if [ "$has_light" = "true" ]; then
+    echo "  light: [" >> "$data_file"
+    for wallpaper in "$subdir/light"/*; do
+      [ -f "$wallpaper" ] || continue
+      case "$wallpaper" in
+        *.jpg|*.jpeg|*.png|*.JPG|*.JPEG|*.PNG) ;;
+        *) continue ;;
+      esac
+      
+      local img_path="${wallpaper#./}"
+      local img_filename="${wallpaper##*/}"
+      local thumbnail_path="thumbnails/$section/light/$img_filename"
+      echo "    { src: '$img_path', thumb: '$thumbnail_path', alt: '$img_filename' }," >> "$data_file"
+    done
+    echo "  ]" >> "$data_file"
+  else
+    echo "  light: []" >> "$data_file"
+  fi
+
+  echo "};" >> "$data_file"
+}
+
+# Clean up old files
+rm -f *.html *.js
+
+# Generate thumbnails
+generate_thumbnails
+
+# Create main index.html
+cat > index.html << 'EOF'
+<!DOCTYPE html>
 <html lang='en'>
 <head>
   <meta charset='utf-8'>
   <meta name='viewport' content='width=device-width, initial-scale=1.0'>
   <link rel='stylesheet' type='text/css' href='style.css'>
   <title>Gruvbox wallpapers</title>
-  <script src='app.js' defer></script>
   <script src='https://kit.fontawesome.com/13865d7982.js' crossorigin='anonymous' defer></script>
+  <style>
+    .section-content {
+      margin: 20px 0;
+      opacity: 0;
+      visibility: hidden;
+      transition: all 0.3s ease-in-out;
+      transform: translateY(10px);
+    }
+    
+    .section.selected .section-content {
+      opacity: 1;
+      visibility: visible;
+      transform: translateY(0);
+    }
+    
+    /* Theme switcher styles */
+    .section-theme-switcher {
+      text-align: center;
+      margin: 15px 0;
+      opacity: 0;
+      visibility: hidden;
+      transition: all 0.3s ease-in-out;
+      transform: translateY(-10px);
+    }
+    
+    .section.selected .section-theme-switcher {
+      opacity: 1;
+      visibility: visible;
+      transform: translateY(0);
+    }
+    
+    .theme-toggle {
+      display: inline-flex;
+      gap: 0;
+    }
+    
+    .theme-btn {
+      padding: 10px 20px;
+      background-color: var(--bg-color-reverse);
+      color: var(--fg-color-reverse);
+      border: 2px solid transparent;
+      cursor: pointer;
+      transition: border-color 0.3s ease;
+      font-weight: 600;
+      font-size: 14px;
+      argin: 0 5px 0 5px;
+    }
+    
+    .theme-btn:hover {
+      background-color: var(--bg-color-reverse);
+    }
+    
+    .theme-btn.active {
+      border: 4px solid var(--fg-color);
+      background-color: var(--bg-color);
+      color: var(--fg-color);
+    }
+    
+    .subsection-content {
+      display: none;
+    }
+    
+    .subsection-content.active {
+      display: block;
+    }
+    
+    .loading {
+      text-align: center;
+      padding: 40px;
+      color: var(--fg-color);
+    }
+  </style>
 </head>
 <body>
   <div class='float-btns'>
@@ -87,7 +234,7 @@ echo "<!DOCTYPE html>
         <i class='fa-brands fa-github'></i>
       </span>
     </a>
-    <button onclick='switchTheme()' class='btn float-btn' title='Switch theme'>
+    <button onclick='switchMainTheme()' class='btn float-btn' title='Switch theme'>
       <span>
         <i id='light-icon' class='fa-solid fa-sun'></i>
         <i id='dark-icon' class='fa-solid fa-moon'></i>
@@ -95,78 +242,264 @@ echo "<!DOCTYPE html>
     </button>
   </div>
   <main>
-  <h1>Gruvbox Wallpapers</h1>" >./index.html
+    <h1>Gruvbox Wallpapers</h1>
+EOF
 
+# Generate sections
 color=1
-
-maxPerPage=8
-
 declare -a sections
-
-generate_thumbnails
+declare -a sections_with_light
 
 for subdir in ./wallpapers/*; do
   section="${subdir##*/}"
   sections+=("$section")
-  write_section_header $color "$section" ./index.html
+  has_light=$(check_has_light_folder "$subdir")
   
-  page=1
-  img_count=0
-  subhtml="${section}_page${page}.html"
-  touch ./$subhtml
-
-  echo "<div class='section' id='$section'>" >>./index.html
-
-  echo "<div class='pager'>" >>./index.html
-  countImgs=$(find "$subdir" -type f | wc -l)
-  countImgs=$((countImgs - 1))
-  for i in $(seq 1 $((($countImgs / $maxPerPage) + 1))); do
-    echo "<button class='btn pager-btn' onclick='loadPage(\"$section\", $i)'>$i</button>" >>./index.html
-  done
-  echo "</div>" >>./index.html
-  echo "<div id='$section-content'>" >>./index.html
-  echo "<div class='c'>" >>./$subhtml
-  for wallpaper in ${subdir}/*; do
-    if [ "$img_count" -ge $maxPerPage ]; then
-      echo "</div>" >>./$subhtml
-      page=$((page + 1))
-      subhtml="${section}_page${page}.html"
-      touch ./$subhtml
-
-      echo "<div class='c'>" >>./$subhtml
-      img_count=0
+  if [ "$has_light" = "true" ]; then
+    sections_with_light+=("$section")
   fi
   
-    write_img "$wallpaper" "./$subhtml"
-    img_count=$((img_count + 1))
-  done
+  # Create the data file
+  create_section_data "$section" "$subdir"
   
-  echo "</div>" >>./$subhtml
+  # Add section to main page
+  echo "    <h2 class='s$color clickable' onclick='activeSection(\"$section\")'>" >> index.html
+  echo "      $(echo "$section" | tr a-z A-Z)" >> index.html
+  echo "    </h2>" >> index.html
+  echo "    <div class='section' id='$section'>" >> index.html
   
-  echo "</div>" >>./index.html
-  echo "</div>" >>./index.html
+  # Add theme switcher if section has light variant
+  if [ "$has_light" = "true" ]; then
+    echo "      <div class='section-theme-switcher'>" >> index.html
+    echo "        <div class='theme-toggle'>" >> index.html
+    echo "          <button class='theme-btn active' onclick='switchSectionTheme(\"$section\", \"dark\")' id='$section-dark-btn'>Dark</button>" >> index.html
+    echo "          <button class='theme-btn' onclick='switchSectionTheme(\"$section\", \"light\")' id='$section-light-btn'>Light</button>" >> index.html
+    echo "        </div>" >> index.html
+    echo "      </div>" >> index.html
+  fi
+  
+  echo "      <div class='section-content' id='$section-content'>" >> index.html
+  echo "        <div class='loading'>Loading...</div>" >> index.html
+  echo "      </div>" >> index.html
+  echo "    </div>" >> index.html
 
   color=$((color + 1))
   if [ "$color" -eq 8 ]; then
     color=1
   fi
 done
-echo "</main>" >>./index.html
-echo "<script>
-  window.onload = () => {" >>./index.html
+
+# Add all section data scripts
 for section in "${sections[@]}"; do
-  echo "    loadPage('$section', 1);" >>./index.html
+  echo "  <script src='${section}_data.js'></script>" >> index.html
 done
 
-echo "
-  activeSection('${sections[0]}');
-  if (window.matchMedia('(prefers-color-scheme: dark)').matches){
-    setTheme('dark');
-  }else{
-    setTheme('light');
-  }
-}
-</script>" >>./index.html
+# Add main JavaScript
+cat >> index.html << 'EOF'
+  <script>
+    // Global state
+    let activeSectionName = null;
+    let sectionStates = {};
 
-echo "</body>
-</html>" >>./index.html
+    // Initialize section state
+    function initSectionState(section) {
+      if (!sectionStates[section]) {
+        sectionStates[section] = {
+          currentTheme: 'dark',
+          currentPages: { dark: 1, light: 1 },
+          loaded: false
+        };
+      }
+    }
+
+    function activeSection(section) {
+      hideAllSections();
+      const targetSection = document.getElementById(section);
+      
+      targetSection.classList.add('selected');
+      activeSectionName = section;
+      
+      initSectionState(section);
+      
+      // Load content if not already loaded
+      if (!sectionStates[section].loaded) {
+        loadSectionContent(section);
+      }
+      
+      // Reset to dark theme
+      if (window.sectionData[section].hasLight) {
+        switchSectionTheme(section, 'dark');
+      }
+      
+      setTimeout(() => {
+        targetSection.scrollIntoView({ block: 'start', behavior: 'smooth' });
+      }, 100);
+    }
+
+    function hideAllSections() {
+      document.querySelectorAll('.section').forEach(s => {
+        s.classList.remove('selected');
+      });
+      activeSectionName = null;
+    }
+
+    function loadSectionContent(section) {
+      const contentDiv = document.getElementById(section + '-content');
+      const data = window.sectionData[section];
+      
+      if (!data) {
+        contentDiv.innerHTML = '<div class="loading">Error: Section data not found</div>';
+        return;
+      }
+      
+      let html = '';
+      
+      // Dark content
+      if (data.dark.length > 0) {
+        html += `<div class="subsection-content active" id="${section}-dark">`;
+        
+        // Dark pagination
+        const darkPages = Math.ceil(data.dark.length / data.maxPerPage);
+        if (darkPages > 1) {
+          html += '<div class="pager">';
+          for (let i = 1; i <= darkPages; i++) {
+            const selectedClass = i === 1 ? ' selected' : '';
+            html += `<button class="btn pager-btn${selectedClass}" onclick="loadPage('${section}', 'dark', ${i})">${i}</button>`;
+          }
+          html += '</div>';
+        }
+        
+        html += `<div id="${section}-dark-content">`;
+        html += generateImageGrid(data.dark.slice(0, data.maxPerPage));
+        html += '</div>';
+        html += '</div>';
+      }
+      
+      // Light content
+      if (data.hasLight && data.light.length > 0) {
+        html += `<div class="subsection-content" id="${section}-light">`;
+        
+        // Light pagination
+        const lightPages = Math.ceil(data.light.length / data.maxPerPage);
+        if (lightPages > 1) {
+          html += '<div class="pager">';
+          for (let i = 1; i <= lightPages; i++) {
+            const selectedClass = i === 1 ? ' selected' : '';
+            html += `<button class="btn pager-btn${selectedClass}" onclick="loadPage('${section}', 'light', ${i})">${i}</button>`;
+          }
+          html += '</div>';
+        }
+        
+        html += `<div id="${section}-light-content">`;
+        html += generateImageGrid(data.light.slice(0, data.maxPerPage));
+        html += '</div>';
+        html += '</div>';
+      }
+      
+      contentDiv.innerHTML = html;
+      sectionStates[section].loaded = true;
+    }
+
+    function generateImageGrid(images) {
+      let html = '<div class="c">';
+      images.forEach(img => {
+        html += `<a target="_blank" href="${img.src}">
+          <img loading="lazy" src="${img.thumb}" alt="${img.alt}" width="200">
+        </a>`;
+      });
+      html += '</div>';
+      return html;
+    }
+
+    function switchSectionTheme(section, theme) {
+      const darkBtn = document.getElementById(section + '-dark-btn');
+      const lightBtn = document.getElementById(section + '-light-btn');
+      const darkContent = document.getElementById(section + '-dark');
+      const lightContent = document.getElementById(section + '-light');
+      
+      initSectionState(section);
+      sectionStates[section].currentTheme = theme;
+      
+      // Update button states
+      if (darkBtn && lightBtn) {
+        darkBtn.classList.toggle('active', theme === 'dark');
+        lightBtn.classList.toggle('active', theme === 'light');
+      }
+      
+      // Switch content visibility
+      if (darkContent && lightContent) {
+        darkContent.classList.toggle('active', theme === 'dark');
+        lightContent.classList.toggle('active', theme === 'light');
+      }
+      
+      // Load first page of selected theme
+      loadPage(section, theme, 1);
+    }
+
+    function loadPage(section, theme, page) {
+      const data = window.sectionData[section];
+      const images = data[theme];
+      const startIdx = (page - 1) * data.maxPerPage;
+      const endIdx = Math.min(startIdx + data.maxPerPage, images.length);
+      const pageImages = images.slice(startIdx, endIdx);
+      
+      const contentDiv = document.getElementById(`${section}-${theme}-content`);
+      if (contentDiv) {
+        contentDiv.innerHTML = generateImageGrid(pageImages);
+      }
+      
+      // Update pagination buttons
+      const pagerButtons = document.getElementById(`${section}-${theme}`)?.getElementsByClassName('pager-btn');
+      if (pagerButtons) {
+        for (let i = 0; i < pagerButtons.length; i++) {
+          pagerButtons[i].classList.toggle('selected', i === page - 1);
+        }
+      }
+      
+      initSectionState(section);
+      sectionStates[section].currentPages[theme] = page;
+    }
+
+    // Main theme functions
+    const HIDDEN_CLASS = 'hidden';
+
+    function hideThemeSwitcher(currentTheme) {
+      if (currentTheme === 'dark') {
+        document.getElementById('dark-icon')?.classList.add(HIDDEN_CLASS);
+        document.getElementById('light-icon')?.classList.remove(HIDDEN_CLASS);
+      } else {
+        document.getElementById('light-icon')?.classList.add(HIDDEN_CLASS);
+        document.getElementById('dark-icon')?.classList.remove(HIDDEN_CLASS);
+      }
+    }
+
+    function setMainTheme(newTheme) {
+      document.documentElement.style.setProperty('color-scheme', newTheme);
+      hideThemeSwitcher(newTheme);
+    }
+
+    function switchMainTheme() {
+      const current = document.documentElement.style.getPropertyValue('color-scheme');
+      setMainTheme(current === 'dark' ? 'light' : 'dark');
+    }
+
+    // Initialize
+    document.addEventListener('DOMContentLoaded', function() {
+EOF
+
+echo "      activeSection('${sections[0]}');" >> index.html
+
+cat >> index.html << 'EOF'
+      if (window.matchMedia('(prefers-color-scheme: dark)').matches) {
+        setMainTheme('dark');
+      } else {
+        setMainTheme('light');
+      }
+    });
+  </script>
+</body>
+</html>
+EOF
+
+echo "Build complete! Generated $(echo ${#sections[@]}) sections with dynamic content loading."
+echo "Sections with light variants: ${sections_with_light[*]}"

layout.css

@@ -1,4 +1,3 @@
-
 main {
     display: flex;
     flex-direction: column;

style.css

@@ -137,6 +137,7 @@ img:hover {
 }
 
 .float-btns {
+  z-index: 10;
   position: fixed;
   bottom: 0;
   right: 0;
@@ -161,3 +162,177 @@ img:hover {
 .hidden {
   display: none !important;
 }
+
+/* Add these styles to your existing style.css */
+
+.subsection-theme-switch {
+  text-align: center;
+  margin: 10px 0;
+}
+
+.btn.subsection-theme-btn {
+  padding: 8px 16px;
+  font-size: 14px;
+  font-weight: 700;
+  margin: 0 4px;
+  border-radius: 4px;
+  
+  &.selected {
+    background-color: var(--bg-color);
+    color: var(--fg-color);
+    border: 2px solid var(--fg-color);
+  }
+  
+  &:not(.selected) {
+    opacity: 0.7;
+  }
+}
+
+.subsection-content {
+  transition: opacity 0.3s ease-in-out;
+}
+
+/* Ensure subsection content containers are properly spaced */
+.section .subsection-content + .subsection-content {
+  margin-top: 0;
+}
+
+/* Enhanced theme switch styles - Add to your style.css */
+
+.subsection-theme-switch {
+  text-align: center;
+  margin: 15px 0 20px 0;
+  opacity: 0;
+  visibility: hidden;
+  transition: all 0.3s ease-in-out;
+  transform: translateY(-10px);
+}
+
+/* Show theme switch only when section is selected */
+.section.selected .subsection-theme-switch {
+  opacity: 1;
+  visibility: visible;
+  transform: translateY(0);
+}
+
+/* Theme switch container styled like a toggle */
+.theme-toggle-container {
+  display: inline-flex;
+  background-color: var(--bg-color-3);
+  border-radius: 25px;
+  padding: 4px;
+  box-shadow: inset 0 2px 4px rgba(0, 0, 0, 0.2);
+  border: 2px solid var(--fg-color);
+  position: relative;
+  overflow: hidden;
+}
+
+.theme-toggle-container::before {
+  content: '';
+  position: absolute;
+  top: 4px;
+  left: 4px;
+  width: calc(50% - 4px);
+  height: calc(100% - 8px);
+  background: linear-gradient(135deg, var(--bg-color-reverse), var(--bg-color-3-switch));
+  border-radius: 20px;
+  transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
+  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.3);
+  z-index: 1;
+}
+
+.theme-toggle-container.light-active::before {
+  transform: translateX(100%);
+}
+
+.btn.subsection-theme-btn {
+  padding: 12px 24px;
+  font-size: 14px;
+  font-weight: 700;
+  border: none;
+  background: transparent;
+  color: var(--fg-color);
+  cursor: pointer;
+  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
+  position: relative;
+  z-index: 2;
+  border-radius: 20px;
+  min-width: 80px;
+  text-transform: uppercase;
+  letter-spacing: 0.5px;
+  
+  &:hover {
+    background: transparent;
+  }
+  
+  &.selected {
+    color: var(--fg-color-reverse);
+    text-shadow: 0 1px 2px rgba(0, 0, 0, 0.3);
+  }
+  
+  &:not(.selected) {
+    opacity: 0.7;
+  }
+  
+  /* Add subtle glow effect for selected button */
+  &.selected {
+    position: relative;
+  }
+  
+  &.selected::after {
+    content: '';
+    position: absolute;
+    top: 0;
+    left: 0;
+    right: 0;
+    bottom: 0;
+    border-radius: 20px;
+    background: rgba(255, 255, 255, 0.1);
+    pointer-events: none;
+  }
+}
+
+/* Animation for button text */
+.btn.subsection-theme-btn {
+  position: relative;
+  overflow: hidden;
+}
+
+.btn.subsection-theme-btn::before {
+  content: attr(data-text);
+  position: absolute;
+  top: 50%;
+  left: 50%;
+  transform: translate(-50%, -50%);
+  transition: transform 0.3s ease;
+  opacity: 0;
+}
+
+.btn.subsection-theme-btn.selected::before {
+  opacity: 1;
+  transform: translate(-50%, -50%) scale(1.05);
+}
+
+/* Responsive adjustments */
+@media screen and (max-width: 640px) {
+  .btn.subsection-theme-btn {
+    padding: 10px 20px;
+    font-size: 12px;
+    min-width: 70px;
+  }
+  
+  .theme-toggle-container {
+    padding: 3px;
+  }
+}
+
+/* Dark mode specific adjustments */
+@media (prefers-color-scheme: dark) {
+  .theme-toggle-container {
+    box-shadow: inset 0 2px 4px rgba(0, 0, 0, 0.4);
+  }
+  
+  .theme-toggle-container::before {
+    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.5);
+  }
+}