body {
    background: #f7f7fc;
    margin: 0;
    padding: 0;
    font-family: 'Pretendard', 'Noto Sans KR', sans-serif;
  }
  
  #sketch-holder {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
  }
  
  #restart-btn {
    position: absolute;
    top: 24px;
    left: 24px;
    padding: 12px 28px;
    font-size: 1.1rem;
    background: linear-gradient(90deg, #ffb347 0%, #ffcc33 100%);
    color: #333;
    border: none;
    border-radius: 24px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.08);
    cursor: pointer;
    font-weight: bold;
    transition: background 0.2s;
    z-index: 10;
  }
  
  #restart-btn:hover {
    background: linear-gradient(90deg, #ffcc33 0%, #ffb347 100%);
  }