.navbar {
    background-color: white;
    box-shadow: 0px 4px 10px -4px rgba(0, 0, 0, 0.7);
    padding: 1rem;
    display: flex;
    justify-content: space-between; /* Align items to left and right */
    align-items: center; /* Vertically center items */
  }
  
  .navbar-left h1 {
    margin: 0;
  }
  
  ul {
    list-style: none;
    display: flex;
  }
  
  li {
    font-size: medium;
    margin-top: 1rem;;
    margin-right: 1rem;
    cursor: pointer;
  }
  
  li:last-child {
    margin-right: 0;
  }
  .proj-title{
    font-size: 20px;
  }
#initialBoard {
    margin-left: 31%;
    margin-right: 5%;
    margin-top: 5%;
}

#answerBoard {
    margin-right: 20%;
    float: right;
    margin-top: 10%;
}
.input-sku{
    margin: -3px;
}
p{
    font-size: 20px;
}
input{
    font-size: 17px;
    margin-top: 3px;
    margin-bottom: 3px;
    margin-left: 1px;
    margin-right: 1px;
    border: 1px solid black;
    width: 61px;
    height: 53px;
}
.solve-btn{
    font-size: 15px;
    margin-left: 47%;
    margin-top: 30px;
    border: 1px solid black;
    padding: 10px;
}
h2 {
    text-align: center;
    margin-top: 6%;
}
.author{
    font-size: 17px;
}
#answerBoard {
    display: grid;
    grid-template-columns: repeat(9, 30px);
    grid-template-rows: repeat(9, 45px);
    grid-gap: 30px;
    margin-top: 50px;
    margin-right: 34%;
    float: right;
}

.cell {
    width: 100%;
    height: 100%;
    font-size: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    border: 1px solid black;
}

.input-sku1{
            margin: -3px;
            background-color: #f2f2f2;
      
      
}
/* Grey color for the output group of the upper right 3x3 block */
.row:nth-child(1):nth-child(-n+3) .cell:nth-child(7),
.row:nth-child(1):nth-child(-n+3) .cell:nth-child(8),
.row:nth-child(1):nth-child(-n+3) .cell:nth-child(9),
.row:nth-child(2):nth-child(-n+3) .cell:nth-child(7),
.row:nth-child(2):nth-child(-n+3) .cell:nth-child(8),
.row:nth-child(2):nth-child(-n+3) .cell:nth-child(9),
.row:nth-child(3):nth-child(-n+3) .cell:nth-child(7),
.row:nth-child(3):nth-child(-n+3) .cell:nth-child(8),
.row:nth-child(3):nth-child(-n+3) .cell:nth-child(9) {
    background-color: #f2f2f2;
}

.row:nth-child(1):nth-child(-n+3) .cell:nth-child(1),
.row:nth-child(1):nth-child(-n+3) .cell:nth-child(2),
.row:nth-child(1):nth-child(-n+3) .cell:nth-child(3),
.row:nth-child(2):nth-child(-n+3) .cell:nth-child(1),
.row:nth-child(2):nth-child(-n+3) .cell:nth-child(2),
.row:nth-child(2):nth-child(-n+3) .cell:nth-child(3),
.row:nth-child(3):nth-child(-n+3) .cell:nth-child(1),
.row:nth-child(3):nth-child(-n+3) .cell:nth-child(2),
.row:nth-child(3):nth-child(-n+3) .cell:nth-child(3) {
    background-color: #f2f2f2;
}

.row:nth-child(4):nth-child(-n+6) .cell:nth-child(4),
.row:nth-child(4):nth-child(-n+6) .cell:nth-child(5),
.row:nth-child(4):nth-child(-n+6) .cell:nth-child(6),
.row:nth-child(5):nth-child(-n+6) .cell:nth-child(4),
.row:nth-child(5):nth-child(-n+6) .cell:nth-child(5),
.row:nth-child(5):nth-child(-n+6) .cell:nth-child(6),
.row:nth-child(6):nth-child(-n+6) .cell:nth-child(4),
.row:nth-child(6):nth-child(-n+6) .cell:nth-child(5),
.row:nth-child(6):nth-child(-n+6) .cell:nth-child(6) {
    background-color: #f2f2f2;
}

.row:nth-child(7):nth-child(-n+9) .cell:nth-child(1),
        .row:nth-child(7):nth-child(-n+9) .cell:nth-child(2),
        .row:nth-child(7):nth-child(-n+9) .cell:nth-child(3),
        .row:nth-child(8):nth-child(-n+9) .cell:nth-child(1),
        .row:nth-child(8):nth-child(-n+9) .cell:nth-child(2),
        .row:nth-child(8):nth-child(-n+9) .cell:nth-child(3),
        .row:nth-child(9):nth-child(-n+9) .cell:nth-child(1),
        .row:nth-child(9):nth-child(-n+9) .cell:nth-child(2),
        .row:nth-child(9):nth-child(-n+9) .cell:nth-child(3) {
            background-color: #f2f2f2;
        }

        .row:nth-child(7):nth-child(-n+9) .cell:nth-child(7),
        .row:nth-child(7):nth-child(-n+9) .cell:nth-child(8),
        .row:nth-child(7):nth-child(-n+9) .cell:nth-child(9),
        .row:nth-child(8):nth-child(-n+9) .cell:nth-child(7),
        .row:nth-child(8):nth-child(-n+9) .cell:nth-child(8),
        .row:nth-child(8):nth-child(-n+9) .cell:nth-child(9),
        .row:nth-child(9):nth-child(-n+9) .cell:nth-child(7),
        .row:nth-child(9):nth-child(-n+9) .cell:nth-child(8),
        .row:nth-child(9):nth-child(-n+9) .cell:nth-child(9) {
            background-color: #f2f2f2;
        }
/* White color for all other cells */
.cell {
    background-color: white;
}
@media only screen and (max-width: 1200px) {
    #initialBoard {
        margin-left: 31%;
        margin-right: 5%;
        margin-top: 10%;
    }
    
    #answerBoard {
        margin-right: 20%;
        float: right;
        margin-top: 10%;
    }
    input{
        font-size: 17px;
        margin-top: 3px;
        margin-bottom: 3px;
        margin-left: 1px;
        margin-right: 1px;
        border: 1px solid black;
        width: 61px;
        height: 53px;
    }
    #answerBoard {
        display: grid;
        grid-template-columns: repeat(9, 30px);
        grid-template-rows: repeat(9, 45px);
        grid-gap: 30px;
        margin-top: 50px;
        margin-right: 20%;
        float: right;
    }
    .solve-btn{
        font-size: 15px;
        margin-left: 53%;
        margin-top: 30px;
        border: 1px solid black;
        padding: 10px;
    }
  }
@media only screen and (max-width: 900px) {
    #initialBoard {
        margin-left: 20%;
        margin-right: 5%;
        margin-top: 10%;
    }
    
    #answerBoard {
        margin-right: 20%;
        float: right;
        margin-top: 10%;
    }
    input{
        font-size: 17px;
        margin-top: 3px;
        margin-bottom: 3px;
        margin-left: 1px;
        margin-right: 1px;
        border: 1px solid black;
        width: 61px;
        height: 53px;
    }
    #answerBoard {
        display: grid;
        grid-template-columns: repeat(9, 30px);
        grid-template-rows: repeat(9, 45px);
        grid-gap: 30px;
        margin-top: 50px;
        margin-right: 21%;
        float: right;
    }
    .solve-btn{
        font-size: 15px;
        margin-left: 47%;
        margin-top: 30px;
        border: 1px solid black;
        padding: 10px;
    }
  }
  @media only screen and (max-width: 730px) {
    #initialBoard {
        margin-left: 21%;
        margin-right: 5%;
        margin-top: 10%;
    }
    
    #answerBoard {
        margin-right: 20%;
        float: right;
        margin-top: 10%;
    }
    input{
        font-size: 17px;
        margin-top: 3px;
        margin-bottom: 3px;
        margin-left: 1px;
        margin-right: 1px;
        border: 1px solid black;
        width: 40px;
        height: 45px;
    }
    #answerBoard {
    display: grid;
    grid-template-columns: repeat(9, 25px);
    grid-template-rows: repeat(9, 45px);
    grid-gap: 30px;
    margin-top: 50px;
    margin-right: 16%;
    float: right;
}
.solve-btn{
    font-size: 15px;
    margin-left: 47%;
    margin-top: 30px;
    border: 1px solid black;
    padding: 10px;
}
  }

  @media only screen and (max-width: 500px) {
    #initialBoard {
        margin-left: 15%;
        margin-right: 5%;
        margin-top: 10%;
    }
    
    #answerBoard {
        margin-right: 20%;
        float: right;
        margin-top: 10%;
    }
    input{
        font-size: 17px;
        margin-top: 3px;
        margin-bottom: 3px;
        margin-left: 1px;
        margin-right: 1px;
        border: 1px solid black;
        width: 35px;
        height: 35px;
    }
    #answerBoard {
    display: grid;
    grid-template-columns: repeat(9, 10px);
    grid-template-rows: repeat(9, 35px);
    grid-gap: 30px;
    margin-top: 50px;
    margin-right: 9%;
    float: right;
}
.solve-btn{
    font-size: 15px;
    margin-left: 45%;
    margin-top: 30px;
    border: 1px solid black;
    padding: 10px;
}
  }

  @media only screen and (max-width: 380px) {
    #initialBoard {
        margin-left: 15%;
        margin-right: 5%;
        margin-top: 10%;
    }
    
    #answerBoard {
        margin-right: 20%;
        float: right;
        margin-top: 10%;
    }
    input{
        font-size: 17px;
        margin-top: 3px;
        margin-bottom: 3px;
        margin-left: 1px;
        margin-right: 1px;
        border: 1px solid black;
        width: 30px;
        height: 35px;
    }
    #answerBoard {
    display: grid;
    grid-template-columns: repeat(9, 5px);
    grid-template-rows: repeat(9, 35px);
    grid-gap: 30px;
    margin-top: 50px;
    margin-right: 9%;
    float: right;
}
.solve-btn{
    font-size: 15px;
    margin-left: 41%;
    margin-top: 30px;
    border: 1px solid black;
    padding: 10px;
}
  }