body {
    background-image: url(indexbg.jpg);
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    background-attachment: fixed;
    min-height: 100vh;
}

.sudoku{
    color: black;
    font-size: 24px;
    font-family: 'Courier New', Courier, monospace;
    text-decoration: none;
    padding: 8px 18px;
    border: 2px dashed rgb(166, 216, 141);
    border-radius: 8px;
    transition: background-color 0.3s, color 0.3s;
    display: flex;
    justify-content: center;
    align-items: center;
    position: fixed;
    left: 50%;
    bottom: 18%;
    transform: translateX(-50%);
}

.tula img
{
  width: 60px;
  height: 60px;
  position: fixed; 
  bottom: 20px; 
  left: 20px;
  cursor: pointer; 
  transition: transform 0.2s ease;
}