:root {
    --bg-main: #0D1117;
    --bg-secondary: #161B22;
    --border-color: #30363D;
    --text-primary: #C9D1D9;
    --text-secondary: #8B949E;
    --accent-color: #2F81F7;
    --accent-color-glow: rgba(47, 129, 247, 0.5);
  
    --color-red: #E53935;
    --color-green: #43A047;
    --color-blue: #1E88E5;
    --color-yellow: #FDD835;
    --color-white: #F5F5F5;
    --color-black: #373737;
  
    --feedback-black: #E53935; /* Red/Black for "Correct Position" */
    --feedback-white: #F5F5F5; /* White for "Correct Color" */
  }
  
  * {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
  }
  
  body {
    font-family: Inter, ui-sans-serif, system-ui, -apple-system, sans-serif;
    background-color: var(--bg-main);
    color: var(--text-primary);
    display: flex;
    flex-direction: column;
    min-height: 100vh;
    overflow-y: auto; 
  }
  
  .topbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    padding: 1rem 1.5rem;
    border-bottom: 1px solid var(--border-color);
    background-color: rgba(13, 17, 23, 0.95);
    position: sticky;
    top: 0;
    z-index: 100;
  }
  
  .topbar h1 {
    font-size: 1.5rem;
    font-weight: 600;
  }
  
  .top-actions {
    display: flex;
    gap: 0.75rem;
    flex-wrap: wrap;
  }
  
  .btn {
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-color);
    padding: 0.5rem 1rem;
    border-radius: 8px;
    color: var(--text-primary);
    cursor: pointer;
    font-size: 0.9rem;
    font-weight: 500;
    transition: all 0.2s ease;
  }
  
  .btn:hover {
    background-color: #21262D;
    border-color: var(--text-secondary);
  }
  
  #btn-submit, #btn-new-game {
    background-color: var(--accent-color);
    border-color: var(--accent-color);
    color: #FFFFFF;
    font-weight: 600;
  }
  
  #btn-submit:hover, #btn-new-game:hover {
    background-color: #4A95F7;
    border-color: #4A95F7;
  }
  
  .btn:disabled {
    background-color: var(--bg-secondary);
    border-color: var(--border-color);
    color: var(--text-secondary);
    cursor: not-allowed;
    opacity: 0.5;
  }
  
  .wrap {
    width: 100%;
    max-width: 1000px;
    margin: 0 auto;
    padding: 2rem;
    flex: 1;
  }
  
  #main-game-board {
    display: grid;
    grid-template-columns: auto 240px;
    justify-content: center;
    gap: 2rem;
  }
  
  .board-area {
    background-color: var(--bg-secondary);
    padding: 1.5rem;
    border-radius: 16px;
    border: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
  }
  
  .guesses {
    list-style: none;
    display: flex;
    flex-direction: column-reverse; 
    gap: 0.5rem;
  }
  
  .guess-row {
    display: flex;
    gap: 1.5rem;
    align-items: center;
    padding: 0.5rem 1rem;
    border-radius: 12px;
    border: 1px solid transparent;
    opacity: 0.5; 
    transition: all 0.3s ease;
  }
  
  .guess-row.active-row {
    opacity: 1;
    background-color: rgba(47, 129, 247, 0.1);
    box-shadow: inset 3px 0 0 var(--accent-color);
    border-color: rgba(47, 129, 247, 0.2);
  }
  
  .row-number {
    font-size: 1rem;
    font-weight: 700;
    color: var(--text-secondary);
    width: 2ch;
    text-align: right;
  }
  
  .peg-slots {
    display: flex;
    gap: 1rem;
  }
  
  .feedback {
    display: flex;
    flex-wrap: wrap;
    gap: 0.4rem;
    padding-left: 1.5rem;
    border-left: 1px solid var(--border-color);
    width: 5rem;
    justify-content: center;
  }
  
  .peg-slot {
    width: 2.5rem;
    height: 2.5rem;
    background-color: var(--bg-main);
    border-radius: 50%;
    position: relative;
    box-shadow: inset 0 3px 6px rgba(0, 0, 0, 0.4);
    border: 1px solid transparent;
  }
  
  .active-row .peg-slot {
    cursor: pointer;
  }
  
  .active-row .peg-slot:hover {
    background-color: #1f252e;
    box-shadow: 0 0 0 2px var(--accent-color-glow);
  }
  
  .peg-slot.selected {
    box-shadow: 
      inset 0 3px 6px rgba(0, 0, 0, 0.4),
      0 0 0 3px var(--accent-color);
  }
  
  .peg-slot[style*="background"], 
  .code-slot[style*="background"],
  .feedback-slot[style*="background"] {
    box-shadow: 
      0 2px 5px rgba(0,0,0,0.3),
      inset 0 2px 3px rgba(255, 255, 255, 0.3);
  }
  
  .feedback-slot {
    width: 0.8rem;
    height: 0.8rem;
    background-color: var(--bg-main);
    border-radius: 50%;
    border: 1px solid rgba(255,255,255,0.1);
  }
  
  .secret-row {
    background-color: var(--bg-main);
    padding: 1rem;
    border-radius: 12px;
    border: 1px solid var(--border-color);
    margin-top: 1rem;
  }
  
  .secret-pegs {
    display: flex;
    gap: 1rem;
    justify-content: center;
  }
  
  .code-slot {
    width: 2.5rem;
    height: 2.5rem;
    border-radius: 50%;
    background: var(--bg-secondary);
    box-shadow: inset 0 3px 6px rgba(0, 0, 0, 0.4);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: bold;
    font-size: 1.2rem;
  }
  
  .controls {
    padding: 1.5rem;
    background-color: var(--bg-secondary);
    border-radius: 16px;
    border: 1px solid var(--border-color);
    align-self: start;
  }
  
  .controls h3 {
    text-align: center;
    margin-bottom: 1rem;
    color: var(--text-secondary);
  }
  
  .colors {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1rem;
    justify-items: center;
    margin-bottom: 1.5rem;
  }
  
  .color-switch {
    width: 3rem;
    height: 3rem;
    border-radius: 50%;
    cursor: pointer;
    border: none;
    transition: transform 0.1s;
  }
  
  .color-switch:hover { transform: scale(1.1); }
  .color-switch:active { transform: scale(0.95); }
  
  .color-switch[data-color="red"] { background-color: var(--color-red); }
  .color-switch[data-color="green"] { background-color: var(--color-green); }
  .color-switch[data-color="blue"] { background-color: var(--color-blue); }
  .color-switch[data-color="yellow"] { background-color: var(--color-yellow); }
  .color-switch[data-color="white"] { background-color: var(--color-white); }
  .color-switch[data-color="black"] { background-color: var(--color-black); }
  
  .clear-field {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
  }
  
  @media (max-width: 768px) {
    #main-game-board { grid-template-columns: 1fr; }
    .controls { order: -1; }
    .colors { grid-template-columns: repeat(6, 1fr); }
    .guess-row { padding: 0.5rem; gap: 0.5rem; }
  }