:root {
    --bg: #1a1a1a;
    --fg: #f4f4f4;
    --primary: #3a7bd5;
    --secondary: #333;
    --accent: #00d2ff;
    --reset: #a70000;
    --reset-accent: #ee0000;
    --header-bg: #2a2a2a;
    --shadow: 0 2px 10px rgba(0, 0, 0, 0.3);
    --card-bg: #2a2a2a;
    --border-radius: 8px;
  }
  
  body {
    margin: 0;
    font-family: 'Segoe UI', sans-serif;
    background-color: var(--bg);
    color: var(--fg);
    padding-bottom: 20px;
  }
  
  /* Control Bar Styles */
  .control-bar {
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 15px 30px;
    margin-bottom: 20px;
  }
  
  .control-card {
    background-color: var(--card-bg);
    padding: 15px 25px;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
  }
  
  .control-group {
    display: flex;
    gap: 30px;
  }
  
  .control-item {
    display: flex;
    align-items: center;
    gap: 10px;
  }
  
  /* Main Content Styles */
  .main-content {
    display: flex;
    justify-content: space-between;
    padding: 0 20px;
    gap: 20px;
    margin-bottom: 30px;
  }
  
  .column {
    flex: 1;
    min-width: 0;
    display: flex;
    flex-direction: column;
  }
  
  .left-column {
    justify-content: center;
    align-items: center;
  }
  
  .center-column {
    justify-content: flex-start;
    align-items: center;
    gap: 30px;
  }
  
  .right-column {
    justify-content: center;
    align-items: center;
  }
  
  .cube-display {
    width: 100%;
    max-width: 300px;
    aspect-ratio: 1/1;
    display: flex;
    justify-content: center;
    align-items: center;
    background-color: var(--secondary);
    border-radius: var(--border-radius);
  }
  
  .scramble-controls {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 10px;
  }
  
  .scramble-info {
    display: flex;
    flex-direction: column;
    gap: 20px;
    text-align: center;
    width: 100%;
  }
  
  .scramble-text, .solution-text {
    display: flex;
    flex-direction: column;
    gap: 8px;
  }
  
  .scramble-display, .solution-display {
    background-color: var(--secondary);
    padding: 12px;
    border-radius: var(--border-radius);
    word-break: break-word;
  }
  
  .timer {
    font-size: 3.5em;
    font-weight: bold;
    margin-bottom: 10px;
    font-family: 'Courier New', monospace;
  }
  
  /* History Section Styles */
  .history-section {
    padding: 20px;
    margin: 20px auto;
    max-width: 1200px;
  }
  
  .history-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
    position: relative;
  }
  
  .history-header h2 {
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
  }
  
  /* Common Elements */
  .btn {
    padding: 10px 16px;
    border: none;
    border-radius: var(--border-radius);
    background-color: var(--primary);
    color: white;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s;
    font-size: 0.95em;
  }
  
  .btn:hover {
    background-color: var(--accent);
    transform: translateY(-1px);
  }

  .reset-btn {
    background-color: var(--reset);
  }

  .reset-btn:hover {
    background-color: var(--reset-accent);
    transform: translateY(-1px);
  }
  
  select {
    appearance: none;
    background-color: var(--secondary);
    color: var(--fg);
    padding: 10px 15px;
    border-radius: var(--border-radius);
    border: none;
    font-size: 1em;
  }
  
  .note {
    font-size: 0.9em;
    color: var(--fg);
    opacity: 0.8;
  }
  
  table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 10px;
    background-color: var(--card-bg);
    border-radius: var(--border-radius);
    overflow: hidden;
  }
  
  th, td {
    border: 1px solid var(--secondary);
    padding: 12px;
    text-align: center;
  }
  
  th {
    background-color: var(--header-bg);
  }
  
  .show-more-btn {
    margin: 15px auto 0;
    padding: 8px 16px;
    display: block;
    width: auto;
    background: transparent;
    color: var(--primary);
    border: 1px solid var(--primary);
  }
  
  .show-more-btn:hover {
    background: rgba(58, 123, 213, 0.1);
    transform: none;
  }
  
  /* Responsive adjustments */
  @media (max-width: 768px) {
    .main-content {
      flex-direction: column;
      gap: 30px;
    }
    
    .control-bar {
      padding: 15px;
    }
    
    .control-group {
      flex-direction: column;
      gap: 15px;
    }
    
    .history-header {
      flex-direction: column;
      align-items: stretch;
      gap: 10px;
    }
    
    .history-header h2 {
      position: static;
      transform: none;
      order: 1;
      text-align: center;
    }
    
    .export-btn {
      order: 2;
      align-self: flex-end;
    }

    .reset-btn {
      order: 2;
      align-self: flex-end;
    }
    
    table {
      font-size: 0.9em;
    }
    
    th, td {
      padding: 8px;
    }
  }