/* ===== BASE STYLES ===== */
:root {
    --bg: #f5f5f5;
    --bar: #ffffff;
    --text: #333333;
    --panel: #f0f0f0;
    --border: #dddddd;
    --text-muted: #666666;
    --hover-bg: rgba(0, 0, 0, 0.1);
    --active-bg: rgba(0, 0, 0, 0.2);
  }
  
  body.dark {
    --bg: #121212;
    --bar: #1e1e1e;
    --text: #e0e0e0;
    --panel: #252525;
    --border: #444444;
    --text-muted: #aaaaaa;
    --hover-bg: rgba(255, 255, 255, 0.1);
    --active-bg: rgba(255, 255, 255, 0.2);
  }
  
  body {
    margin: 0;
    font-family: Oxanium, sans-serif;
    background: var(--bg);
    color: var(--text);
    transition: background-color 0.3s, color 0.3s;
    height: 100vh;
    overflow: hidden;
  }
  
  /* ===== BROWSER BAR ===== */
  .browser-bar {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 8px 12px;
    background: var(--bar);
    border-bottom: 1px solid var(--border);
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.05);
  }
  
  .nav-buttons {
    display: flex;
    gap: 4px;
  }
  
  .action-buttons {
    display: flex;
    gap: 4px;
  }
  
  .nav-buttons button,
  .action-buttons button {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    font-size: 20px;
    color: var(--text);
    background: transparent;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    transition: all 0.2s;
    padding: 0;
  }
  
  .nav-buttons button:hover,
  .action-buttons button:hover {
    background-color: var(--hover-bg);
  }
  
  .nav-buttons button:active,
  .action-buttons button:active {
    background-color: var(--active-bg);
    transform: scale(0.95);
  }
  
  .nav-buttons button:disabled,
  .action-buttons button:disabled {
    opacity: 0.5;
    cursor: not-allowed;
  }
  
  .nav-buttons button:disabled:hover,
  .action-buttons button:disabled:hover {
    background-color: transparent;
    transform: none;
  }
  
  /* ===== URL INPUT ===== */
  #url {
    font-family: 'Oxanium', sans-serif;
    flex: 1;
    padding: 8px 16px;
    font-size: 14px;
    border-radius: 6px;
    border: 1px solid var(--border);
    background: var(--panel);
    color: var(--text);
    transition: all 0.2s;
    outline: none;
  }
  
  #url::placeholder {
    color: var(--text-muted);
  }
  
  #url:focus {
    border-color: #4285f4;
    box-shadow: 0 0 0 2px rgba(66, 133, 244, 0.2);
  }
  
  /* ===== TABS CONTAINER ===== */
  .tabs-container {
    display: flex;
    align-items: center;
    background: var(--bar);
    border-bottom: 1px solid var(--border);
    padding: 4px 8px;
    gap: 4px;
    overflow-x: auto;
  }
  
  .tabs {
    display: flex;
    gap: 2px;
    flex: 1;
    overflow-x: auto;
  }
  
  /* ===== TAB STYLING ===== */
  .tab {
    position: relative;
    min-width: 100px;
    max-width: 200px;
    overflow: hidden;
    transition: background-color 0.2s;
    padding: 8px 12px;
    display: flex;
    align-items: center;
    gap: 6px;
    background: transparent;
    border-radius: 4px;
    cursor: pointer;
  }
  
  .tab:hover {
    background: var(--hover-bg);
  }
  
  .tab.active {
    background: rgba(66, 133, 244, 0.1);
  }
  
  .tab.active::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    right: 0;
    height: 2px;
    background: #4285f4;
    animation: slideIn 0.2s ease-out;
  }
  
  .tab img {
    width: 16px;
    height: 16px;
    object-fit: contain;
    border-radius: 2px;
    background: rgba(255, 255, 255, 0.1);
    padding: 1px;
    flex-shrink: 0;
  }
  
  .tab.active img {
    background: rgba(66, 133, 244, 0.2);
  }
  
  .tab span {
    flex: 1;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    font-size: 13px;
  }
  
  /* ===== CLOSE TAB BUTTON ===== */
  .close-tab {
    opacity: 0;
    transition: all 0.2s;
    padding: 2px 4px;
    border-radius: 50%;
    margin-left: auto;
    font-size: 16px;
    line-height: 1;
    background: transparent;
    border: none;
    color: var(--text);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 20px;
    height: 20px;
  }
  
  .tab:hover .close-tab {
    opacity: 0.7;
  }
  
  .close-tab:hover {
    background: rgba(255, 0, 0, 0.2);
    opacity: 1 !important;
  }
  
  .close-tab:active {
    background-color: rgba(255, 0, 0, 0.3);
    transform: scale(0.95);
  }
  
  /* ===== ADD TAB BUTTON ===== */
  .add-tab {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    font-size: 20px;
    color: var(--text);
    flex-shrink: 0;
    background: transparent;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    transition: all 0.2s;
  }
  
  .add-tab:hover {
    background-color: var(--hover-bg);
  }
  
  .add-tab:active {
    background-color: var(--active-bg);
    transform: scale(0.95);
  }
  
  /* ===== MAIN CONTENT ===== */
  .main {
    display: flex;
    height: calc(100vh - 112px); /* Account for browser bar and tabs */
  }
  
  /* ===== SIDEBAR ===== */
  .sidebar {
    width: 250px;
    background: var(--panel);
    border-right: 1px solid var(--border);
    display: flex;
    flex-direction: column;
    transition: all 0.3s;
    flex-shrink: 0;
  }
  
  .sidebar.collapsed {
    width: 40px;
  }
  
  .sidebar.collapsed .list,
  .sidebar.collapsed .list-header {
    display: none;
  }
  
  /* ===== SIDEBAR TOGGLE ===== */
  .sidebar-toggle {
    padding: 8px;
    display: flex;
    justify-content: flex-end;
    background: transparent;
  }
  
  .sidebar.collapsed .sidebar-toggle {
    justify-content: center;
  }
  
  #toggleSidebar {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 32px;
    height: 32px;
    font-size: 20px;
    color: var(--text);
    background: transparent;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    transition: all 0.2s;
  }
  
  #toggleSidebar:hover {
    background-color: var(--hover-bg);
  }
  
  #toggleSidebar:active {
    background-color: var(--active-bg);
    transform: scale(0.95);
  }
  
  /* ===== LISTS ===== */
  .list {
    padding: 0 8px 12px;
    overflow-y: auto;
    flex: 1;
  }
  
  .sidebar.collapsed .list {
    display: none;
  }
  
  /* ===== LIST HEADERS ===== */
  .list-header {
    padding: 12px 0 8px;
    border-bottom: 1px solid var(--border);
    margin-bottom: 8px;
    font-size: 14px;
    font-weight: 600;
    color: var(--text);
    display: flex;
    justify-content: space-between;
    align-items: center;
  }
  
  /* ===== CLEAR HISTORY BUTTON ===== */
  #clearHistory {
    transition: all 0.2s;
    background: transparent;
    border: none;
    cursor: pointer;
    font-size: 16px;
    color: var(--text);
    padding: 4px;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 32px;
    height: 32px;
    border-radius: 4px;
  }
  
  #clearHistory:hover {
    background-color: rgba(255, 0, 0, 0.1);
    color: #ff4444;
  }
  
  #clearHistory:active {
    background-color: rgba(255, 0, 0, 0.2);
    transform: scale(0.95);
  }
  
  /* ===== ITEMS ===== */
  #history,
  #bookmarks {
    max-height: calc(50vh - 60px);
    overflow-y: auto;
  }
  
  .item {
    position: relative;
    transition: background-color 0.2s;
    padding: 8px 12px;
    border-radius: 4px;
    display: flex;
    align-items: center;
    gap: 8px;
    margin: 2px 0;
    cursor: pointer;
  }
  
  .item:hover {
    background-color: var(--hover-bg);
  }
  
  .item img {
    width: 16px;
    height: 16px;
    object-fit: contain;
    border-radius: 2px;
    background: rgba(255, 255, 255, 0.1);
    padding: 1px;
    flex-shrink: 0;
  }
  
  .item-text {
    flex: 1;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    margin-right: 8px;
    font-size: 14px;
  }
  
  /* ===== DELETE ITEM BUTTON ===== */
  .delete-item {
    background: transparent;
    border: none;
    cursor: pointer;
    color: var(--text);
    padding: 4px;
    border-radius: 3px;
    opacity: 0;
    transition: all 0.2s;
    font-size: 14px;
    line-height: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 24px;
    height: 24px;
  }
  
  .item:hover .delete-item {
    opacity: 0.7;
  }
  
  .delete-item:hover {
    background-color: rgba(255, 0, 0, 0.2);
    opacity: 1 !important;
  }
  
  .delete-item:active {
    background-color: rgba(255, 0, 0, 0.3);
    transform: scale(0.95);
  }
  
  /* ===== IFRAME CONTAINER ===== */
  .iframe-container {
    flex: 1;
    position: relative;
    background: #000000;
  }
  
  .iframe-container iframe {
    width: 100%;
    height: 100%;
    border: none;
    background: white;
  }
  
  /* ===== TAB PREVIEW ===== */
  .tab-preview {
    position: fixed;
    display: none;
    width: 300px;
    height: 200px;
    border: 1px solid var(--border);
    background: var(--panel);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
    z-index: 10000;
    border-radius: 8px;
    overflow: hidden;
    pointer-events: none;
  }
  
  .tab-preview iframe {
    width: 100%;
    height: 100%;
    border: none;
  }
  
  /* ===== MATERIAL ICONS ===== */
  .material-icons {
    font-size: inherit;
    line-height: 1;
  }
  
  /* ===== SCROLLBAR STYLING ===== */
  ::-webkit-scrollbar {
    width: 8px;
    height: 8px;
  }
  
  ::-webkit-scrollbar-track {
    background: var(--panel);
  }
  
  ::-webkit-scrollbar-thumb {
    background: #888;
    border-radius: 4px;
    transition: background 0.2s;
  }
  
  ::-webkit-scrollbar-thumb:hover {
    background: #555;
  }
  
  /* ===== LOADING STATES ===== */
  .tab img.loading {
    opacity: 0.5;
    animation: pulse 1.5s infinite;
  }
  
  #reload.loading {
    animation: spin 1s linear infinite;
  }
  
  /* ===== ANIMATIONS ===== */
  @keyframes pulse {
    0% { opacity: 0.5; }
    50% { opacity: 0.8; }
    100% { opacity: 0.5; }
  }
  
  @keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
  }
  
  @keyframes slideIn {
    from { transform: scaleX(0); }
    to { transform: scaleX(1); }
  }
  
  /* ===== RESPONSIVE DESIGN ===== */
  @media (max-width: 768px) {
    .sidebar {
      width: 200px;
    }
    
    .tab {
      min-width: 80px;
      max-width: 150px;
      padding: 6px 8px;
    }
    
    .tab span {
      font-size: 12px;
    }
    
    .item {
      padding: 6px 8px;
    }
    
    .item-text {
      font-size: 12px;
    }
    
    .main {
      height: calc(100vh - 120px);
    }
  }
  
  @media (max-width: 480px) {
    .browser-bar {
      flex-wrap: wrap;
      gap: 8px;
      padding: 8px;
    }
    
    .nav-buttons,
    .action-buttons {
      order: 1;
    }
    
    #url {
      order: 2;
      width: 100%;
      margin: 0;
    }
    
    .sidebar {
      position: absolute;
      z-index: 1000;
      height: 100%;
      width: 250px;
      transition: transform 0.3s;
      background: var(--panel);
    }
    
    .sidebar.collapsed {
      transform: translateX(-100%);
    }
    
    /* Adjust button sizes for mobile */
    .nav-buttons button,
    .action-buttons button,
    .add-tab {
      padding: 8px;
      min-width: 44px;
      min-height: 44px;
    }
    
    .close-tab {
      opacity: 1;
      font-size: 14px;
      padding: 6px;
      width: 24px;
      height: 24px;
    }
    
    .delete-item {
      opacity: 0.7;
      font-size: 12px;
      padding: 6px;
      width: 28px;
      height: 28px;
    }
    
    .main {
      height: calc(100vh - 128px);
    }
  }
  
  /* Touch device optimizations */
  @media (hover: none) and (pointer: coarse) {
    .close-tab,
    .delete-item {
      opacity: 0.7;
      padding: 8px;
      min-width: 44px;
      min-height: 44px;
    }
    
    .tab,
    .item {
      padding: 12px;
    }
    
    /* Larger tap targets */
    .nav-buttons button,
    .action-buttons button,
    .add-tab {
      min-height: 44px;
      min-width: 44px;
    }
  }
  
  /* Print styles */
  @media print {
    .sidebar,
    .browser-bar,
    .tabs-container,
    .delete-item,
    .close-tab {
      display: none !important;
    }
    
    .main {
      height: 100vh;
    }
    
    .iframe-container {
      height: 100vh;
    }
  }

  #lisence-link {
    color: #333333;
  }

  #lisence-link.dark {
    color: #e0e0e0
  }