style.css

* {
    margin: 0;
    padding: 0;
}

body {

    font-family: Arial, Helvetica, sans-serif;
    text-align: center;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-direction: column;
    min-height: 100%;
    /* background-size: cover; */
    /* background-position: center center; */
    /* background-repeat: no-repeat; */
}

h1 {
    font-weight: 500;
    color: #fff;
    font-size: 3rem;
}

.sudoku-container {
    margin-top: 21px;
    display: flex;
    justify-content: center;


}

table {
    border-collapse: collapse;
    border: 5px solid rgba(9, 9, 121, 1);
    /* border: 5px solid #000; */

}

.cell {
    width: 50px;
    height: 50px;
    text-align: center;
    font-size: 40px;
    border: 1px solid #999;
    transform: all 0.3s ease-in-out;
    background: rgb(244, 213, 99);
}

table tr:nth-child(2n) td,
table tr:nth-child(2n) td {
    border-bottom: 3px solid rgba(9, 9, 121, 1);
    /* border-bottom: 2px solid #000; */
}

table td:nth-child(4n) {
    border-right: 3px solid rgba(9, 9, 121, 1);
    /* border-right: 2px solid #000; */
}

input {
    outline: none;


}

input::-webkit-outer-spin-button,
input::-webkit-inner-spin-buton {
    -webkit-appearance: none;
    margin: 0;

}

button {
    margin-top: 20px;
    padding: 10px 20px;
    font-size: 16px;
    background-color: #1665cc;
    color: #fff;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    transition: all 0.3s ease;
    margin-right: 1rem;
}

.btn-s:hover {
    background-color: #92d3ff;
    color: #1665cc;
}

.backHome a:hover,
.backHome:hover {
    text-decoration: none;
    background-color: #92d3ff;
    color: rgb(35, 107, 159);
}

.backHome,
.backHome a {
    padding: 12px;
    background-color: #1665cc;
    border: none;
    border-radius: 10px;
    color: white;
    font-size: 14px;
    font-weight: 600;
    letter-spacing: 0.1rem;
    cursor: pointer;
    margin-bottom: 10px;
}

.output-cell {
    color: #1e25e8;
}

label{
    font-size: 1.3rem;
}

.lives-container {
    text-align: center;
    margin: 10px;
    background-color: greenyellow;
    font-size: 1.5rem;
    padding:5px ;
    border-radius: 10px;
    margin-left: 50px;
}

.info{
    display: flex;
    align-items: center;
    justify-content: center;
}
.size{
    height: fit-content;

}
select,option{
    font-size: 1.3rem;
    border-radius: 10px;
    padding: 2px;
}


.navbar{
    /* margin-top: 25px; */
    display: flex;
    justify-content: center;
    align-items: center;
    justify-content: space-between;
    height: 67px;
    width: 100%;
    background:linear-gradient(#1e2b59 , #0f1d34 );
    border-bottom:1px solid #ffb780;
}
.image img{
    height: 55px;
    width: 55px;
}
.left-nav ul{
    display: flex;
    justify-content: center;
    align-items: center;
}
.left-nav ul li{
    list-style: none;
}
.left-nav ul li a{
    text-decoration: none;
    color: #ffb780;
    text-align: center;
    padding: 14px 20px;
    text-decoration: none;
    font-size: 1.3rem;
}
.left-nav ul li a:hover{
    text-decoration: underline;
}
.footer-container{
    border-top: 1px solid #ffb780;
    width: 100%;
    background:linear-gradient(#1e2b59 , #0f1d34 );
    padding: 20px;
    /* background: url(Image.png); */
     background-position: center;
     line-height: 2.5rem;
}
.foot-head h2{
    text-align: center;
    color: aqua;
    font-weight: 600;
}
.foot-head p{
    color: #ffb780;
    text-align: center;
    font-size: 1.20rem;
}
.foot-navlinks h3{
    text-align: center;
    color: aqua;
    font-weight: 600;
}
.foot-navlinks {
    text-align: center;
}
.foot-navlinks a{
    color: #ffb780;
    font-size: 18px;
    padding: 10px;
}
.foot-social {
    text-align: center;
}
.foot-social h3{
    color: aqua;
    font-weight: 600;
}
.foot-social a{
    font-size: 30px;
    color: #ffb780;
}
html{
    overflow-x: hidden;
}
.head{
    margin-top: 30px;
}
.backHome{
    margin-bottom: 30px;
}
#hearts{
    display: flex;
}

#choose-size{
    margin: 10px;
    background-color: rgb(255, 175, 47);
    padding:5px ;
    border-radius: 10px;
    line-height: 1.7rem;
}

#timer-container{
    font-size: 1.1rem;
    margin: 10px;
    background-color: rgb(248, 255, 47);
    padding:5px ;
    border-radius: 10px;
    line-height: 1.8rem;
}
#timer-container span{
    font-size: 1.4rem;
    background-color: white;
    padding: 3px;
    border-radius: 5px;
}

@media (max-width:500px){
    .cell{
        height: 10vw;
        width: 10vw;
        font-size: 7vw;
    }

}
html {
    scroll-behavior: smooth;
  }
  
  ::-webkit-scrollbar {
    width: 15px;
  }
  
  ::-webkit-scrollbar-track {
    border-radius: 5px;
    box-shadow: inset 0 0 10px rgba(0, 0, 0, 0.25);
  }
  
  ::-webkit-scrollbar-thumb {
    border-radius: 5px;
    background: linear-gradient(to top, rgba(0, 212, 255, 1), rgba(9, 9, 121, 1));
  }