* {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
    }

    :root {
      --primary: #3498db;
      --secondary: #9b59b6;
      --success: #2ecc71;
      --danger: #e74c3c;
      --warning: #f39c12;
      --dark: #1e1f29;
      --darker: #121218;
      --light: #ecf0f1;
      --medium: #7f8c8d;
      --header-height: 50px;
      --footer-height: 40px;
    }

    body {
      font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
      display: flex;
      flex-direction: column;
      height: 100vh;
      background-color: var(--darker);
      color: var(--light);
      overflow: hidden;
      touch-action: manipulation;
    }

    /* Header styles */
    header {
      display: flex;
      justify-content: space-between;
      align-items: center;
      padding: 0 15px;
      height: var(--header-height);
      background: linear-gradient(135deg, #2c3e50, #1a1a2e);
      box-shadow: 0 2px 10px rgba(0, 0, 0, 0.5);
      z-index: 1000;
    }

    .logo {
      display: flex;
      align-items: center;
      gap: 10px;
    }

    .logo h1 {
      font-size: 1.2rem;
      font-weight: 600;
      background: linear-gradient(90deg, var(--primary), var(--secondary));
      -webkit-background-clip: text;
      background-clip: text;
      color: transparent;
    }

    .logo i {
      color: var(--primary);
      font-size: 1.5rem;
    }

    .controls {
      display: flex;
      gap: 8px;
    }

    .btn {
      background: linear-gradient(135deg, var(--primary), #2980b9);
      color: white;
      border: none;
      padding: 8px 12px;
      border-radius: 20px;
      font-size: 0.8rem;
      cursor: pointer;
      display: flex;
      align-items: center;
      gap: 5px;
      transition: all 0.2s ease;
      box-shadow: 0 2px 5px rgba(0, 0, 0, 0.2);
      min-width: 40px;
      justify-content: center;
    }

    .btn:hover {
      transform: translateY(-2px);
      box-shadow: 0 4px 8px rgba(0, 0, 0, 0.3);
    }

    .btn i {
      font-size: 0.9rem;
    }

    .btn-success {
      background: linear-gradient(135deg, var(--success), #27ae60);
    }

    .btn-danger {
      background: linear-gradient(135deg, var(--danger), #c0392b);
    }

    .btn-warning {
      background: linear-gradient(135deg, var(--warning), #e67e22);
    }

    /* Main container */
    .container {
      display: flex;
      flex: 1;
      flex-direction: column;
      overflow: hidden;
    }

    /* Tabs */
    .tabs {
      display: flex;
      background: #252836;
      border-bottom: 1px solid #3a3f4b;
      overflow-x: auto;
      -webkit-overflow-scrolling: touch;
    }

    .tab {
      padding: 12px 20px;
      cursor: pointer;
      position: relative;
      background-color: #252836;
      transition: all 0.3s ease;
      white-space: nowrap;
      font-size: 0.9rem;
    }

    .tab.active {
      background-color: var(--dark);
      color: var(--primary);
    }

    .tab.active::after {
      content: '';
      position: absolute;
      bottom: -1px;
      left: 0;
      width: 100%;
      height: 3px;
      background: linear-gradient(90deg, var(--primary), var(--secondary));
    }

    /* Editor and Preview area */
    .editor-area {
      display: flex;
      flex: 1;
      overflow: hidden;
      position: relative;
    }

    #editor {
      height: 100%;
      width: 100%;
      position: absolute;
    }

    .preview-container {
      flex: 1;
      display: flex;
      flex-direction: column;
      overflow: hidden;
      display: none;
    }

    #preview {
      flex: 1;
      width: 100%;
      border: none;
      background-color: white;
    }

    /* Console panel */
    .console-panel {
      height: 200px;
      background-color: #1a1a24;
      border-top: 1px solid #2d2d3a;
      display: flex;
      flex-direction: column;
      overflow: hidden;
      display: none;
    }

    .console-header {
      display: flex;
      justify-content: space-between;
      align-items: center;
      padding: 8px 15px;
      background-color: #252836;
      border-bottom: 1px solid #3a3f4b;
    }

    .console-header h3 {
      font-size: 0.95rem;
      color: var(--primary);
      display: flex;
      align-items: center;
      gap: 8px;
    }

    .console-actions {
      display: flex;
      gap: 8px;
    }

    .console-content {
      flex: 1;
      padding: 10px;
      overflow-y: auto;
      font-family: monospace;
      font-size: 0.85rem;
      line-height: 1.4;
    }

    .console-log {
      padding: 5px 0;
      border-bottom: 1px solid #2d2d3a;
      color: #bdc3c7;
    }

    .console-log.error {
      color: #e74c3c;
    }

    .console-log.warn {
      color: #f39c12;
    }

    .console-log.info {
      color: #3498db;
    }

    /* Settings panel */
    .settings-panel {
      display: none;
      padding: 15px;
      background-color: #252836;
      overflow-y: auto;
    }

    .settings-group {
      margin-bottom: 25px;
    }

    .settings-group h3 {
      margin-bottom: 15px;
      color: var(--secondary);
      font-size: 1rem;
      display: flex;
      align-items: center;
      gap: 8px;
    }

    .settings-group h3 i {
      font-size: 0.9rem;
    }

    .setting-item {
      margin-bottom: 15px;
    }

    .setting-item label {
      display: block;
      margin-bottom: 5px;
      font-size: 0.85rem;
      color: #bdc3c7;
    }

    select, input {
      width: 100%;
      padding: 8px 10px;
      background: #2c3e50;
      border: 1px solid #3a3f4b;
      border-radius: 4px;
      color: white;
      font-size: 0.85rem;
    }

    .checkbox-container {
      display: flex;
      align-items: center;
      gap: 10px;
    }

    .checkbox-container input {
      width: 18px;
      height: 18px;
    }

    /* Footer */
    footer {
      display: flex;
      justify-content: space-between;
      align-items: center;
      padding: 0 15px;
      height: var(--footer-height);
      background: #252836;
      border-top: 1px solid #3a3f4b;
      font-size: 0.75rem;
      color: var(--medium);
      z-index: 800;
    }

    .status {
      display: flex;
      align-items: center;
      gap: 10px;
    }

    .status-indicator {
      width: 10px;
      height: 10px;
      border-radius: 50%;
      background-color: var(--success);
    }

    .status-indicator.idle {
      background-color: var(--warning);
    }

    .footer-controls {
      display: flex;
      gap: 15px;
    }

    .footer-btn {
      background: none;
      border: none;
      color: #bdc3c7;
      cursor: pointer;
      font-size: 0.9rem;
      display: flex;
      align-items: center;
      gap: 5px;
      transition: color 0.3s ease;
    }

    .footer-btn:hover {
      color: var(--primary);
    }

    .footer-btn.active {
      color: var(--primary);
      font-weight: bold;
    }

    /* Mobile menu */
    .mobile-menu {
      display: flex;
      position: fixed;
      bottom: 0;
      left: 0;
      width: 100%;
      background: #252836;
      border-top: 1px solid #3a3f4b;
      padding: 10px;
      z-index: 1000;
    }

    .mobile-menu-buttons {
      display: flex;
      justify-content: space-around;
      width: 100%;
    }

    .mobile-btn {
      background: none;
      border: none;
      color: #bdc3c7;
      cursor: pointer;
      display: flex;
      flex-direction: column;
      align-items: center;
      gap: 5px;
      font-size: 0.75rem;
      padding: 5px;
    }

    .mobile-btn.active {
      color: var(--primary);
    }

    .mobile-btn i {
      font-size: 1.2rem;
    }

    /* Responsive design */
    @media (max-width: 768px) {
      .btn span {
        display: none;
      }
      
      .logo h1 {
        font-size: 1rem;
      }
      
      .tab {
        padding: 10px 15px;
        font-size: 0.85rem;
      }
      
      .footer-btn span {
        display: none;
      }
      
      .footer-controls {
        gap: 10px;
      }
    }

    @media (max-width: 480px) {
      :root {
        --header-height: 45px;
        --footer-height: 35px;
      }
      
      .logo h1 {
        font-size: 0.9rem;
      }
      
      .btn {
        padding: 7px;
        min-width: 35px;
      }
      
      .tab {
        padding: 8px 12px;
        font-size: 0.8rem;
      }
    }

    /* Toast notifications */
    .toast {
      position: fixed;
      bottom: 70px;
      right: 10px;
      padding: 12px 20px;
      background: #252836;
      border-left: 4px solid var(--primary);
      border-radius: 4px;
      box-shadow: 0 5px 15px rgba(0, 0, 0, 0.3);
      z-index: 1200;
      display: flex;
      align-items: center;
      gap: 10px;
      transform: translateX(150%);
      transition: transform 0.3s ease;
      max-width: 90%;
    }

    .toast.show {
      transform: translateX(0);
    }

    .toast.success {
      border-left-color: var(--success);
    }

    .toast.error {
      border-left-color: var(--danger);
    }

    .toast.warning {
      border-left-color: var(--warning);
    }