claudecodeui/src/index.css

@tailwind base;
@tailwind components;
@tailwind utilities;

/* Global spinner animation - defined early to ensure it loads */
@keyframes spin {
  0% {
    transform: rotate(0deg);
  }
  100% {
    transform: rotate(360deg);
  }
}

@-webkit-keyframes spin {
  0% {
    -webkit-transform: rotate(0deg);
  }
  100% {
    -webkit-transform: rotate(360deg);
  }
}

@layer base {
  :root {
    --background: 44 22% 96%;
    --foreground: 36 25% 4%;
    --card: 0 0% 100%;
    --card-foreground: 36 25% 4%;
    --popover: 0 0% 100%;
    --popover-foreground: 36 25% 4%;
    --primary: 221.2 83.2% 53.3%;
    --primary-foreground: 210 40% 98%;
    --secondary: 44 15% 91%;
    --secondary-foreground: 36 15% 18%;
    --muted: 44 15% 91%;
    --muted-foreground: 40 5% 44%;
    --accent: 44 15% 91%;
    --accent-foreground: 36 15% 18%;
    --destructive: 0 84.2% 60.2%;
    --destructive-foreground: 210 40% 98%;
    --border: 44 14% 87%;
    --input: 44 14% 87%;
    --ring: 221.2 83.2% 53.3%;
    --radius: 0.5rem;

    /* Nav design tokens */
    --nav-glass-bg: 44 22% 96% / 0.7;
    --nav-glass-blur: 20px;
    --nav-glass-saturate: 1.8;
    --nav-tab-glow: 221.2 83.2% 53.3% / 0.18;
    --nav-tab-ring: 221.2 83.2% 53.3% / 0.10;
    --nav-float-shadow: 0 0% 0% / 0.06;
    --nav-float-ring: 44 14% 87% / 0.5;
    --nav-divider-color: 44 14% 87% / 0.5;
    --nav-input-bg: 44 15% 91% / 0.5;
    --nav-input-focus-ring: 221.2 83.2% 53.3% / 0.22;

    /* Safe area CSS variables */
    --safe-area-inset-top: env(safe-area-inset-top);
    --safe-area-inset-right: env(safe-area-inset-right);
    --safe-area-inset-bottom: env(safe-area-inset-bottom);
    --safe-area-inset-left: env(safe-area-inset-left);

    /* Mobile navigation dimensions - Single source of truth */
    /* Floating nav: ~52px bar + 8px bottom margin + 12px px-3 top spacing */
    --mobile-nav-height: 52px;
    --mobile-nav-padding: 20px;
    --mobile-nav-total: calc(var(--mobile-nav-height) + var(--mobile-nav-padding) + env(safe-area-inset-bottom, 0px));

    /* Header safe area dimensions */
    --header-safe-area-top: env(safe-area-inset-top, 0px);
    --header-base-padding: 8px;
    --header-total-padding: calc(var(--header-safe-area-top) + var(--header-base-padding));
  }
  
  /* Fallback for older iOS versions */
  @supports (padding-top: constant(safe-area-inset-top)) {
    :root {
      --safe-area-inset-top: constant(safe-area-inset-top);
      --safe-area-inset-right: constant(safe-area-inset-right);
      --safe-area-inset-bottom: constant(safe-area-inset-bottom);
      --safe-area-inset-left: constant(safe-area-inset-left);
    }
  }

  .dark {
    --background: 0 0% 8%;
    --foreground: 40 8% 93%;
    --card: 0 0% 12%;
    --card-foreground: 40 8% 93%;
    --popover: 0 0% 12%;
    --popover-foreground: 40 8% 93%;
    --primary: 217.2 91.2% 59.8%;
    --primary-foreground: 0 0% 8%;
    --secondary: 0 0% 17%;
    --secondary-foreground: 40 8% 93%;
    --muted: 0 0% 17%;
    --muted-foreground: 0 0% 60%;
    --accent: 0 0% 17%;
    --accent-foreground: 40 8% 93%;
    --destructive: 0 62.8% 30.6%;
    --destructive-foreground: 40 8% 93%;
    --border: 0 0% 17%;
    --input: 0 0% 23%;
    --ring: 217.2 91.2% 59.8%;

    /* Nav design tokens — dark overrides */
    --nav-glass-bg: 0 0% 12% / 0.55;
    --nav-glass-blur: 24px;
    --nav-glass-saturate: 1.6;
    --nav-tab-glow: 217.2 91.2% 59.8% / 0.25;
    --nav-tab-ring: 217.2 91.2% 59.8% / 0.15;
    --nav-float-shadow: 0 0% 0% / 0.35;
    --nav-float-ring: 0 0% 17% / 0.3;
    --nav-divider-color: 0 0% 17% / 0.5;
    --nav-input-bg: 0 0% 17% / 0.5;
    --nav-input-focus-ring: 217.2 91.2% 59.8% / 0.25;
  }
}

@layer base {
  * {
    @apply border-border;
    box-sizing: border-box;
    transition: none;
  }
  
  body {
    @apply bg-background text-foreground;

    font-family: "Encode Sans", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    margin: 0;
    padding: 0;
  }

  html, body {
    height: 100%;
    margin: 0;
    padding: 0;
    /* The app shell is a fixed inset-0 container (see AppContent), so the
       document itself never needs to scroll. Clipping it removes the phantom
       full-height page scrollbar and disables the browser pull-to-refresh
       gesture that reloads the page when scrolling up on mobile. */
    overflow: hidden;
    overscroll-behavior-y: contain;
  }
  
  /* Root element with safe area padding for PWA */
  #root {
    min-height: 100vh;
    margin: 0;
    padding: 0;
    box-sizing: border-box;
  }
  
  /* Apply safe area padding in standalone mode */
  @supports (padding-top: env(safe-area-inset-top)) {
    @media (display-mode: standalone) {
      #root {
        padding-top: var(--safe-area-inset-top);
        padding-left: var(--safe-area-inset-left);
        padding-right: var(--safe-area-inset-right);
      }
    }
  }

  /* PWA mode detected by JavaScript - more reliable */
  body.pwa-mode #root {
    padding-left: var(--safe-area-inset-left);
    padding-right: var(--safe-area-inset-right);
    height: 100vh;
    overflow: hidden;
  }

  /* Adjust fixed inset positioning in PWA mode */
  body.pwa-mode .fixed.inset-0 {
    top: var(--header-total-padding);
    left: var(--safe-area-inset-left);
    right: var(--safe-area-inset-right);
    bottom: 0;
  }
  
  /* Global transition defaults */
  button, 
  a, 
  input, 
  textarea, 
  select,
  [role="button"],
  .transition-all {
    transition: all 150ms cubic-bezier(0.4, 0, 0.2, 1);
  }
  
  /* Color transitions for theme switching - exclude interactive elements */
  body, div, section, article, aside, header, footer, nav, main,
  h1, h2, h3, h4, h5, h6, p, span, blockquote,
  ul, ol, li, dl, dt, dd,
  table, thead, tbody, tfoot, tr, td, th,
  form, fieldset, legend, label {
    transition: background-color 200ms ease-in-out, 
                border-color 200ms ease-in-out,
                color 200ms ease-in-out;
  }
  
  /* Transform transitions */
  .transition-transform {
    transition: transform 150ms cubic-bezier(0.4, 0, 0.2, 1);
  }
  
  /* Opacity transitions */
  .transition-opacity {
    transition: opacity 200ms ease-in-out;
  }
  
  /* Scale transitions for interactions */
  .transition-scale {
    transition: transform 100ms cubic-bezier(0.4, 0, 0.2, 1);
  }
  
  /* Shadow transitions */
  .transition-shadow {
    transition: box-shadow 200ms ease-in-out;
  }
  
  /* Respect reduced motion preference */
  @media (prefers-reduced-motion: reduce) {
    *,
    ::before,
    ::after {
      animation-duration: 0.01ms !important;
      animation-iteration-count: 1 !important;
      transition-duration: 0.01ms !important;
      scroll-behavior: auto !important;
    }
  }
}

@layer utilities {
  /* Smooth hover transitions for interactive elements */
  button:hover,
  a:hover,
  [role="button"]:hover {
    transition-duration: 100ms;
  }
  
  /* Active state transitions */
  button:active,
  a:active,
  [role="button"]:active {
    transition-duration: 50ms;
  }
  
  /* Focus transitions */
  button:focus-visible,
  a:focus-visible,
  input:focus-visible,
  textarea:focus-visible,
  select:focus-visible {
    transition: outline-offset 150ms ease-out, box-shadow 150ms ease-out;
  }
  
  /* Sidebar transitions */
  .sidebar-transition {
    transition: transform 300ms cubic-bezier(0.4, 0, 0.2, 1),
                opacity 300ms ease-in-out;
  }

  /* Nav glass surface — uses theme tokens */
  .nav-glass {
    background: hsl(var(--nav-glass-bg));
    backdrop-filter: blur(var(--nav-glass-blur)) saturate(var(--nav-glass-saturate));
    -webkit-backdrop-filter: blur(var(--nav-glass-blur)) saturate(var(--nav-glass-saturate));
  }

  /* Nav tab active pill glow — uses theme tokens */
  .nav-tab-active {
    box-shadow: 0 1px 8px hsl(var(--nav-tab-glow)),
                0 0 0 1px hsl(var(--nav-tab-ring));
  }

  /* Floating mobile nav bar — uses theme tokens */
  .mobile-nav-float {
    box-shadow: 0 -1px 20px hsl(var(--nav-float-shadow)),
                0 0 0 1px hsl(var(--nav-float-ring));
  }

  /* Subtle sidebar divider — uses theme tokens */
  .nav-divider {
    height: 1px;
    background: linear-gradient(90deg, transparent, hsl(var(--nav-divider-color)) 20%, hsl(var(--nav-divider-color)) 80%, transparent);
  }

  /* Nav search input surface — uses theme tokens */
  .nav-search-input {
    background: hsl(var(--nav-input-bg));
    border: none;
  }

  .nav-search-input:focus-within {
    background: hsl(var(--background));
    box-shadow: 0 0 0 2px hsl(var(--nav-input-focus-ring));
  }
  
  /* Modal and dropdown transitions */
  .modal-transition {
    transition: opacity 200ms ease-in-out,
                transform 200ms cubic-bezier(0.4, 0, 0.2, 1);
  }
  
  /* Chat message transitions */
  .message-transition {
    transition: opacity 300ms ease-in-out,
                transform 300ms cubic-bezier(0.4, 0, 0.2, 1);
  }
  
  /* Height transitions for expanding elements */
  .height-transition {
    transition: height 200ms ease-in-out,
                max-height 200ms ease-in-out;
  }
  
  .scrollbar-thin {
    scrollbar-width: thin;
    scrollbar-color: hsl(var(--muted-foreground)) transparent;
  }
  
  .scrollbar-thin::-webkit-scrollbar {
    width: 6px;
    height: 6px;
  }
  
  .scrollbar-thin::-webkit-scrollbar-track {
    background: transparent;
  }
  
  .scrollbar-thin::-webkit-scrollbar-thumb {
    background-color: hsl(var(--muted-foreground));
    border-radius: 3px;
  }
  
  .scrollbar-thin::-webkit-scrollbar-thumb:hover {
    background-color: hsl(var(--muted-foreground) / 0.8);
  }
  
  /* Dark mode scrollbar styles */
  .dark .scrollbar-thin {
    scrollbar-color: rgba(156, 163, 175, 0.5) transparent;
  }
  
  .dark .scrollbar-thin::-webkit-scrollbar-track {
    background: rgba(38, 38, 38, 0.3);
  }
  
  .dark .scrollbar-thin::-webkit-scrollbar-thumb {
    background-color: rgba(156, 163, 175, 0.5);
    border-radius: 3px;
  }
  
  .dark .scrollbar-thin::-webkit-scrollbar-thumb:hover {
    background-color: rgba(156, 163, 175, 0.7);
  }
  
  /* Global scrollbar styles for main content areas */
  .dark::-webkit-scrollbar {
    width: 8px;
    height: 8px;
  }
  
  .dark::-webkit-scrollbar-track {
    background: rgba(38, 38, 38, 0.5);
  }
  
  .dark::-webkit-scrollbar-thumb {
    background-color: rgba(107, 114, 128, 0.5);
    border-radius: 4px;
  }
  
  .dark::-webkit-scrollbar-thumb:hover {
    background-color: rgba(107, 114, 128, 0.7);
  }
  
  /* Firefox scrollbar styles */
  .dark {
    scrollbar-width: thin;
    scrollbar-color: rgba(115, 115, 115, 0.5) rgba(38, 38, 38, 0.5);
  }
  
  /* Ensure checkbox styling is preserved */
  input[type="checkbox"] {
    @apply accent-blue-600;
    opacity: 1;
  }
  
  input[type="checkbox"]:focus {
    opacity: 1;
    outline: 2px solid hsl(var(--ring));
    outline-offset: 2px;
  }
  
  /* Fix checkbox appearance in dark mode */
  .dark input[type="checkbox"] {
    background-color: rgb(31 41 55); /* gray-800 */
    border-color: rgb(75 85 99); /* gray-600 */
    color: rgb(37 99 235); /* blue-600 */
    color-scheme: dark;
  }
  
  .dark input[type="checkbox"]:checked {
    background-color: rgb(37 99 235); /* blue-600 */
    border-color: rgb(37 99 235); /* blue-600 */
  }
  
  .dark input[type="checkbox"]:focus {
    --tw-ring-color: rgb(59 130 246); /* blue-500 */
    --tw-ring-offset-color: rgb(31 41 55); /* gray-800 */
  }
  
  /* Fix radio button appearance in dark mode */
  .dark input[type="radio"] {
    background-color: rgb(31 41 55); /* gray-800 */
    border-color: rgb(75 85 99); /* gray-600 */
    color: rgb(37 99 235); /* blue-600 */
    color-scheme: dark;
  }
  
  .dark input[type="radio"]:checked {
    background-color: rgb(37 99 235); /* blue-600 */
    border-color: rgb(37 99 235); /* blue-600 */
  }
  
  .dark input[type="radio"]:focus {
    --tw-ring-color: rgb(59 130 246); /* blue-500 */
    --tw-ring-offset-color: rgb(31 41 55); /* gray-800 */
  }
  
  /* Ensure textarea text is always visible in dark mode */
  textarea {
    color-scheme: light dark;
  }
  
  .dark textarea {
    color: rgb(243 244 246) !important; /* gray-100 */
    -webkit-text-fill-color: rgb(243 244 246) !important;
    caret-color: rgb(243 244 246) !important;
  }
  
  /* Fix for focus state in dark mode */
  .dark textarea:focus {
    color: rgb(243 244 246) !important;
    -webkit-text-fill-color: rgb(243 244 246) !important;
  }
  
  /* Fix for iOS/Safari dark mode textarea issues */
  @supports (-webkit-touch-callout: none) {
    .dark textarea {
      background-color: transparent !important;
      color: rgb(243 244 246) !important;
      -webkit-text-fill-color: rgb(243 244 246) !important;
    }
    
    .dark textarea:focus {
      background-color: transparent !important;
      color: rgb(243 244 246) !important;
      -webkit-text-fill-color: rgb(243 244 246) !important;
    }
  }
  
  /* Ensure parent container doesn't override textarea styles */
  .dark .bg-gray-800 textarea {
    color: rgb(243 244 246) !important;
    -webkit-text-fill-color: rgb(243 244 246) !important;
  }
  
  /* Fix focus-within container issues in dark mode */
  .dark .focus-within\:ring-2:focus-within {
    background-color: rgb(20 20 20) !important;
  }
  
  /* Ensure textarea remains transparent with visible text */
  .dark textarea.bg-transparent {
    background-color: transparent !important;
    color: rgb(243 244 246) !important;
    -webkit-text-fill-color: rgb(243 244 246) !important;
  }
  
  /* Fix placeholder text color to be properly gray */
  textarea::placeholder {
    color: rgb(156 163 175) !important; /* gray-400 */
    opacity: 1 !important;
  }
  
  .dark textarea::placeholder {
    color: rgb(75 85 99) !important; /* gray-600 - darker gray */
    opacity: 1 !important;
  }
  
  /* More specific selector for chat input textarea */
  .dark .bg-gray-800 textarea::placeholder,
  .dark textarea.bg-transparent::placeholder {
    color: rgb(75 85 99) !important; /* gray-600 - darker gray */
    opacity: 1 !important;
    -webkit-text-fill-color: rgb(75 85 99) !important;
  }
  
  /* Custom class for chat input placeholder */
  .chat-input-placeholder::placeholder {
    color: rgb(156 163 175) !important;
    opacity: 1 !important;
  }

  .dark .chat-input-placeholder::placeholder {
    color: rgb(75 85 99) !important;
    opacity: 1 !important;
    -webkit-text-fill-color: rgb(75 85 99) !important;
  }

  .chat-input-placeholder::-webkit-input-placeholder {
    color: rgb(156 163 175) !important;
    opacity: 1 !important;
  }

  .dark .chat-input-placeholder::-webkit-input-placeholder {
    color: rgb(75 85 99) !important;
    opacity: 1 !important;
    -webkit-text-fill-color: rgb(75 85 99) !important;
  }
  
  /* WebKit specific placeholder styles */
  textarea::-webkit-input-placeholder {
    color: rgb(156 163 175) !important;
    opacity: 1 !important;
  }
  
  .dark textarea::-webkit-input-placeholder {
    color: rgb(75 85 99) !important; /* gray-600 - darker gray */
    opacity: 1 !important;
  }
  
  /* Mozilla specific placeholder styles */
  textarea::-moz-placeholder {
    color: rgb(156 163 175) !important;
    opacity: 1 !important;
  }
  
  .dark textarea::-moz-placeholder {
    color: rgb(75 85 99) !important; /* gray-600 - darker gray */
    opacity: 1 !important;
  }
  
  /* IE/Edge specific placeholder styles */
  textarea:-ms-input-placeholder {
    color: rgb(156 163 175) !important;
    opacity: 1 !important;
  }
  
  .dark textarea:-ms-input-placeholder {
    color: rgb(75 85 99) !important; /* gray-600 - darker gray */
    opacity: 1 !important;
  }
}

/* Mobile optimizations and components */
@layer components {
  .chat-messages-pane {
    contain: layout style paint;
  }

  .chat-composer-shell {
    contain: layout style;
  }

  .chat-activity-enter {
    animation: chat-activity-enter 320ms cubic-bezier(0.22, 1, 0.36, 1) both;
    transform-origin: bottom center;
    will-change: transform, opacity, filter;
  }

  .chat-activity-exit {
    animation: chat-activity-exit 220ms cubic-bezier(0.4, 0, 1, 1) both;
    transform-origin: bottom center;
    will-change: transform, opacity, filter;
  }

  .chat-activity-tab {
    clip-path: inset(-8px -8px 0 -8px);
  }

  .chat-message {
    contain: layout style paint;
    content-visibility: auto;
    contain-intrinsic-size: auto 180px;
  }

  .chat-message.assistant {
    contain-intrinsic-size: auto 240px;
  }

  .chat-message.user,
  .chat-message.tool,
  .chat-message.error {
    contain-intrinsic-size: auto 96px;
  }

  /* Mobile touch optimization and safe areas */
  @media (max-width: 768px) {
    * {
      touch-action: manipulation;
      -webkit-tap-highlight-color: transparent;
    }
    
    /* Allow vertical scrolling in scroll containers */
    .overflow-y-auto, [data-scroll-container] {
      touch-action: pan-y;
      -webkit-overflow-scrolling: touch;
    }
    
    /* Preserve checkbox visibility */
    input[type="checkbox"] {
      -webkit-tap-highlight-color: rgba(0, 0, 0, 0.1);
      opacity: 1 !important;
    }
    
    button, 
    [role="button"],
    .clickable,
    a,
    .cursor-pointer {
      -webkit-tap-highlight-color: transparent;
      user-select: none;
      -webkit-user-select: none;
      touch-action: manipulation;
    }
    
    /* Better mobile touch targets */
    .mobile-touch-target {
      @apply min-h-[44px] min-w-[44px];
    }
    
    /* Chat message improvements */
    .chat-message.user {
      @apply justify-end;
    }
    
    .chat-message.user > div {
      @apply max-w-[85%];
    }
    
    .chat-message.assistant > div,
    .chat-message.error > div {
      @apply w-full sm:max-w-[95%];
    }
    
    /* Session name truncation on mobile */
    .session-name-mobile {
      @apply truncate;
      max-width: calc(100vw - 120px); /* Account for sidebar padding and buttons */
    }
    
    /* Enable text selection on mobile for terminal */
    .xterm,
    .xterm .xterm-viewport {
      -webkit-user-select: text !important;
      user-select: text !important;
      -webkit-touch-callout: default !important;
    }
    
    /* Fix mobile scrolling */
    .overflow-y-auto {
      touch-action: pan-y;
      -webkit-overflow-scrolling: touch;
    }
    
    .chat-message {
      touch-action: pan-y;
    }
    
    /* Fix hover states on mobile */
    .group:active .group-hover\:opacity-100,
    .group .group-hover\:opacity-100 {
      opacity: 1 !important;
    }
    
    @media (hover: none) and (pointer: coarse) {
      .group-hover\:opacity-100 {
        opacity: 1 !important;
      }
      
      .hover\:bg-gray-50:hover,
      .hover\:bg-gray-100:hover,
      .hover\:bg-red-200:hover,
      .dark\:hover\:bg-gray-700:hover,
      .dark\:hover\:bg-red-900\/50:hover {
        background-color: inherit;
      }
    }
  }
  
  /* Touch device optimizations for all screen sizes */
  @media (hover: none) and (pointer: coarse) {
    .touch\:opacity-100 {
      opacity: 1 !important;
    }
    
    /* Completely disable hover states on touch devices */
    * {
      -webkit-tap-highlight-color: transparent !important;
    }
    
    /* Preserve checkbox visibility on touch devices */
    input[type="checkbox"] {
      -webkit-tap-highlight-color: rgba(0, 0, 0, 0.1) !important;
      opacity: 1 !important;
    }
    
    /* Only disable hover states for interactive elements, not containers */
    button:hover,
    [role="button"]:hover,
    .cursor-pointer:hover,
    a:hover,
    .hover\:bg-gray-50:hover,
    .hover\:bg-gray-100:hover,
    .hover\:text-gray-900:hover,
    .hover\:opacity-100:hover {
      background-color: inherit !important;
      color: inherit !important;
      opacity: inherit !important;
      transform: inherit !important;
    }
    
    /* Force buttons to be immediately clickable */
    button, [role="button"], .cursor-pointer {
      cursor: pointer !important;
      pointer-events: auto !important;
    }
    
    /* Keep active states for immediate feedback */
    .active\:scale-\[0\.98\]:active,
    .active\:scale-95:active {
      transform: scale(0.98) !important;
    }
  }
  
  /* Safe area support for iOS devices */
  .ios-bottom-safe {
    padding-bottom: env(safe-area-inset-bottom);
  }
  
  /* PWA specific header adjustments - uses CSS variables for consistency */
  .pwa-header-safe {
    padding-top: var(--header-base-padding);
  }

  /* When PWA mode is detected by JavaScript */
  body.pwa-mode .pwa-header-safe {
    /* Reset padding since #root already handles safe area */
    padding-top: 0px !important;
  }

  /* For mobile PWA, add bottom padding for better spacing */
  @media screen and (max-width: 768px) {
    body.pwa-mode .pwa-header-safe {
      padding-bottom: 8px;
    }
  }
  
  @media screen and (max-width: 768px) {
    .chat-input-mobile {
      padding-bottom: calc(60px + env(safe-area-inset-bottom));
    }
  }

  /* Text wrapping improvements */
  .chat-message {
    word-wrap: break-word;
    overflow-wrap: break-word;
    hyphens: auto;
  }

  /* Force wrap long URLs and code */
  .chat-message pre,
  .chat-message code {
    white-space: pre-wrap !important;
    word-break: break-all;
    overflow-wrap: break-word;
  }

  /* Prevent horizontal scroll in chat area */
  .chat-message * {
    max-width: 100%;
    box-sizing: border-box;
  }

  /* Hide scrollbar utility for horizontal scroll */
  .scrollbar-hide {
    -ms-overflow-style: none;
    scrollbar-width: none;
  }

  .scrollbar-hide::-webkit-scrollbar {
    display: none;
  }
}

/* Hide markdown backticks in prose content */
.prose code::before,
.prose code::after {
  content: "" !important;
  display: none !important;
}

/* Custom spinner animation for mobile compatibility */
@layer utilities {
  @keyframes spin {
    from {
      transform: rotate(0deg);
    }
    to {
      transform: rotate(360deg);
    }
  }
  
  .animate-spin {
    animation: spin 1s linear infinite;
  }
  
  /* Force hardware acceleration for smoother animation on mobile */
  .loading-spinner {
    animation: spin 1s linear infinite;
    will-change: transform;
    transform: translateZ(0);
    -webkit-transform: translateZ(0);
    backface-visibility: hidden;
    -webkit-backface-visibility: hidden;
  }
  
  /* Improved textarea styling */
  .chat-input-placeholder {
    display: block !important;
    scrollbar-width: thin;
    scrollbar-color: rgba(156, 163, 175, 0.3) transparent;
  }

  /* Ensure container fits textarea tightly */
  .chat-input-placeholder:not(:focus) {
    height: auto;
  }
  
  .chat-input-placeholder::-webkit-scrollbar {
    width: 6px;
  }
  
  .chat-input-placeholder::-webkit-scrollbar-track {
    background: transparent;
    margin: 8px 0;
  }
  
  .chat-input-placeholder::-webkit-scrollbar-thumb {
    background-color: rgba(156, 163, 175, 0.3);
    border-radius: 3px;
    transition: background-color 0.2s;
  }
  
  .chat-input-placeholder::-webkit-scrollbar-thumb:hover {
    background-color: rgba(156, 163, 175, 0.5);
  }
  
  .dark .chat-input-placeholder {
    scrollbar-color: rgba(107, 114, 128, 0.3) transparent;
  }
  
  .dark .chat-input-placeholder::-webkit-scrollbar-thumb {
    background-color: rgba(107, 114, 128, 0.3);
  }
  
  .dark .chat-input-placeholder::-webkit-scrollbar-thumb:hover {
    background-color: rgba(107, 114, 128, 0.5);
  }
  
  /* Enhanced box shadow when textarea expands */
  .chat-input-expanded {
    box-shadow: 0 -5px 15px -3px rgba(0, 0, 0, 0.1), 0 -4px 6px -2px rgba(0, 0, 0, 0.05);
  }
  
  .dark .chat-input-expanded {
    box-shadow: 0 -5px 15px -3px rgba(0, 0, 0, 0.3), 0 -4px 6px -2px rgba(0, 0, 0, 0.2);
  }
  
  /* Fix focus ring offset color in dark mode */
  .dark [class*="ring-offset"] {
    --tw-ring-offset-color: rgb(20 20 20);
  }

  /* Ensure buttons don't show white backgrounds in dark mode */
  .dark button:focus {
    --tw-ring-offset-color: rgb(20 20 20);
  }
  
  /* Fix mobile select dropdown styling */
  @supports (-webkit-touch-callout: none) {
    select {
      font-size: 16px !important;
      -webkit-appearance: none;
    }
  }
  
  /* Improve select appearance in dark mode */
  .dark select {
    background-image: url("data:image/svg+xml;charset=UTF-8,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%239CA3AF' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3e%3cpolyline points='6 9 12 15 18 9'%3e%3c/polyline%3e%3c/svg%3e");
    background-repeat: no-repeat;
    background-position: right 0.5rem center;
    background-size: 1.5em 1.5em;
    padding-right: 2.5rem;
    -webkit-appearance: none;
    -moz-appearance: none;
    appearance: none;
  }
  
  select {
    background-image: url("data:image/svg+xml;charset=UTF-8,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%236B7280' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3e%3cpolyline points='6 9 12 15 18 9'%3e%3c/polyline%3e%3c/svg%3e");
    background-repeat: no-repeat;
    background-position: right 0.5rem center;
    background-size: 1.5em 1.5em;
    padding-right: 2.5rem;
    -webkit-appearance: none;
    -moz-appearance: none;
    appearance: none;
  }
  
  /* Fix select option text in mobile */
  select option {
    font-size: 16px !important;
    padding: 8px !important;
    background-color: var(--background) !important;
    color: var(--foreground) !important;
  }
  
  .dark select option {
    background-color: rgb(31 31 31) !important;
    color: rgb(237 235 230) !important;
  }

  /* Tool details chevron animation */
  details[open] .details-chevron,
  details[open] summary svg[class*="group-open"] {
    transform: rotate(180deg);
  }

  /* Smooth chevron transition */
  .details-chevron,
  summary svg[class*="transition-transform"] {
    transition: transform 200ms cubic-bezier(0.4, 0, 0.2, 1);
  }

  /* Settings content fade-in transition */
  @keyframes settings-fade-in {
    from { opacity: 0; transform: translateY(4px); }
    to { opacity: 1; transform: translateY(0); }
  }

  .settings-content-enter {
    animation: settings-fade-in 150ms ease-out;
  }

  @keyframes chat-activity-enter {
    0% {
      opacity: 0;
      filter: blur(3px);
      transform: translateY(18px) scaleY(0.92);
    }
    65% {
      opacity: 1;
      filter: blur(0);
      transform: translateY(-2px) scaleY(1.01);
    }
    100% {
      opacity: 1;
      filter: blur(0);
      transform: translateY(0) scaleY(1);
    }
  }

  @keyframes chat-activity-exit {
    0% {
      opacity: 1;
      filter: blur(0);
      transform: translateY(0) scaleY(1);
    }
    100% {
      opacity: 0;
      filter: blur(2px);
      transform: translateY(14px) scaleY(0.96);
    }
  }

  /* Search result highlight flash */
  .search-highlight-flash {
    animation: search-flash 4s ease-out;
  }

  @keyframes search-flash {
    0%, 50% {
      outline: 3px solid hsl(var(--primary));
      outline-offset: 4px;
      border-radius: 8px;
      background-color: hsl(var(--primary) / 0.06);
    }
    100% {
      outline: 3px solid transparent;
      outline-offset: 4px;
      background-color: transparent;
    }
  }
}