* {
    padding: 0;
    margin: 0;
}

body {
    padding: 0;
    margin: 0;
}

div.sudoku {
    text-align: center;
    padding-top: 25px;
    margin:0 auto;
    width: 386px;
    z-index: 100;
}
div.sudoku select {
}
div.sudoku input{
    margin-top: 10px;
    padding: 0px;
}
table.sudoku {
    margin-top: 10px;
    border-collapse: collapse;
    border: solid black 3px;
    background-color: white;
}
table.sudoku td input {
    border: none;
    padding: 0;
    margin: 0;
    text-align: center;
    font-size: 30px;
    background-color: white;
}
table.sudoku td input.predef {
    color: black;
}
table.sudoku td.topleft {
    height: 60px;
    width: 60px;
    border-top: solid black 3px;
    border-bottom: solid black 1px;
    border-left: solid black 3px;
    border-right: solid black 1px;
}
table.sudoku td.middleleft {
    height: 60px;
    width: 60px;
    border-top: solid black 1px;
    border-bottom: solid black 1px;
    border-left: solid black 3px;
    border-right: solid black 1px;
}
table.sudoku td.bottomleft {
    height: 60px;
    width: 60px;
    border-top: solid black 1px;
    border-bottom: solid black 3px;
    border-left: solid black 3px;
    border-right: solid black 1px;
}
table.sudoku td.topmiddle {
    height: 60px;
    width: 60px;
    border-top: solid black 3px;
    border-bottom: solid black 1px;
    border-left: solid black 1px;
    border-right: solid black 1px;
}
table.sudoku td.middlemiddle {
    height: 60px;
    width: 60px;
    border-top: solid black 1px;
    border-bottom: solid black 1px;
    border-left: solid black 1px;
    border-right: solid black 1px;
}
table.sudoku td.bottommiddle {
    height: 60px;
    width: 60px;
    border-top: solid black 1px;
    border-bottom: solid black 3px;
    border-left: solid black 1px;
    border-right: solid black 1px;
}
table.sudoku td.topright {
    height: 60px;
    width: 60px;
    border-top: solid black 3px;
    border-bottom: solid black 1px;
    border-left: solid black 1px;
    border-right: solid black 3px;
}
table.sudoku td.middleright {
    height: 60px;
    width: 60px;
    border-top: solid black 1px;
    border-bottom: solid black 1px;
    border-left: solid black 1px;
    border-right: solid black 3px;
}
table.sudoku td.bottomright {
    height: 60px;
    width: 60px;
    border-right: solid black 3px;
    border-bottom: solid black 3px;
}