:root {
    --bg-primary: #111827;
    --bg-secondary: #1f2937;
    --text-primary: #f3f4f6;
    --text-secondary: #9ca3af;
    --accent-primary: #6366f1;
    --accent-secondary: #8b5cf6;
    --error: #ef4444;
    --success: #10b981;
    --info: #3b82f6;
  }
  
  * {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'JetBrains Mono', monospace;
  }
  
  body {
    background-color: var(--bg-primary);
    color: var(--text-primary);
    min-height: 100vh;
  }
  
  .app {
    display: flex;
    flex-direction: column;
    min-height: 100vh;
  }
  
  header {
    background-color: var(--bg-secondary);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    padding: 1rem;
    position: sticky;
    top: 0;
    z-index: 50;
    display: flex;
    justify-content: space-between;
    align-items: center;
  }
  
  .title {
    font-size: 1.875rem;
    font-weight: bold;
    background: linear-gradient(to right, var(--accent-primary), var(--accent-secondary), #ec4899);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    animation: gradient 8s linear infinite;
    background-size: 200% 200%;
  }
  
  .header-buttons {
    display: flex;
    gap: 1rem;
  }
  
  .btn {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 1rem;
    border-radius: 0.5rem;
    border: none;
    cursor: pointer;
    font-weight: 500;
    transition: all 0.2s;
  }
  
  .btn-primary {
    background-color: var(--accent-primary);
    color: white;
  }
  
  .btn-primary:hover {
    background-color: #4f46e5;
    transform: scale(1.05);
  }
  
  .btn-secondary {
    background-color: var(--accent-secondary);
    color: white;
  }
  
  .btn-secondary:hover {
    background-color: #7c3aed;
    transform: scale(1.05);
  }
  
  .icon {
    width: 1rem;
    height: 1rem;
  }
  
  main {
    flex: 1;
    padding: 1rem;
  }
  
  .editor-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
    height: calc(100vh - 5rem);
  }
  
  .editor-grid.expanded .editor-section {
    display: none;
  }
  
  .editor-grid.expanded .preview-section {
    grid-column: 1 / -1;
  }
  
  .editor-section {
    display: flex;
    flex-direction: column;
    gap: 1rem;
  }
  
  .tabs {
    display: flex;
    background-color: var(--bg-secondary);
    border-radius: 0.5rem 0.5rem 0 0;
    overflow: hidden;
  }
  
  .tab {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem 1.5rem;
    background: none;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    transition: all 0.2s;
  }
  
  .tab:hover {
    background-color: rgba(255, 255, 255, 0.1);
  }
  
  .tab.active {
    background-color: var(--accent-primary);
    color: white;
  }
  
  .code-editor {
    flex: 1;
    border-radius: 0 0 0.5rem 0.5rem;
    overflow: hidden;
  }
  
  .console {
    height: 200px;
    background-color: var(--bg-secondary);
    border-radius: 0.5rem;
    overflow: hidden;
  }
  
  .console-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.5rem 1rem;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  }
  
  .console-title {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--text-secondary);
  }
  
  .btn-clear {
    background: none;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    padding: 0.25rem 0.5rem;
    border-radius: 0.25rem;
  }
  
  .btn-clear:hover {
    background-color: rgba(255, 255, 255, 0.1);
  }
  
  .console-output {
    height: calc(100% - 2.5rem);
    padding: 1rem;
    overflow-y: auto;
    font-size: 0.875rem;
  }
  
  .console-output .error {
    color: var(--error);
  }
  
  .console-output .success {
    color: var(--success);
  }
  
  .console-output .info {
    color: var(--info);
  }
  
  .preview-section {
    background-color: white;
    border-radius: 0.5rem;
    overflow: hidden;
    display: flex;
    flex-direction: column;
  }
  
  .preview-header {
    background-color: var(--bg-secondary);
    padding: 0.5rem 1rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  }
  
  .window-controls {
    display: flex;
    gap: 0.5rem;
  }
  
  .control {
    width: 0.75rem;
    height: 0.75rem;
    border-radius: 50%;
  }
  
  .control.red { background-color: #ef4444; }
  .control.yellow { background-color: #f59e0b; }
  .control.green { background-color: #10b981; }
  
  iframe {
    flex: 1;
    width: 100%;
    border: none;
    background-color: white;
  }
  
  @keyframes gradient {
    0% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
    100% { background-position: 0% 50%; }
  }
  
  /* Custom scrollbar */
  ::-webkit-scrollbar {
    width: 8px;
    height: 8px;
  }
  
  ::-webkit-scrollbar-track {
    background: var(--bg-secondary);
    border-radius: 4px;
  }
  
  ::-webkit-scrollbar-thumb {
    background: var(--accent-primary);
    border-radius: 4px;
  }
  
  ::-webkit-scrollbar-thumb:hover {
    background: #4f46e5;
  }