td {
    padding: 0;
}
#grid {
    border-radius: 10px;
    margin: 0 auto;
}
.minigrid {
    border: 2px solid;
    border-radius: 15px;
}
.cell {
    width: 60px;
    height: 60px;
    text-align: center;
    border-radius: 2.5px;
    border: 1.5px solid;
    font-size: 300%;
}
.cell::-webkit-outer-spin-button,
.cell::-webkit-inner-spin-button {
    -webkit-appearance: none;
    margin: 0;
}
.cell {
    -moz-appearance: textfield;
  }
.cell:focus {
    border-radius: 8px;
    border: 1px #000000;
}
.container {
    margin: 0 auto;
}
#solve {
    margin: 2% 48.5%;
}
#retry {
    margin: 1% 48%;
    display: none;
}
.btn {
    border: 1px solid #000000;
}