gol_style.css

body {
  margin: 0;
  background-color: #94949E;
  color: white;
}

.navbar {
    background-color: black;
  }
  .navbar-toggler {
    background-color: white;
  }

  .navbar-brand {
    cursor: pointer;
  }

  .navbar > div {
    justify-content: flex-end;
}

.btn-group > button {
  border-right-width: 2px;
  border-left-width: 2px;
  border-color: black;
}

#pattern {
    height: 38px;
    border-radius: 5px;
    background-color: #686871;
    color: white;
    padding-left: 5px;
    cursor: pointer;
  }

  #pattern > optgroup {
    background-color: #94949E;
  }

  #pattern option {
    background-color: #CDCDDD;
    color: black;
}

#slider {
    display: flex;
    border-radius: 5px;
    color: white;
    background-color: #686871;
    padding-right: 10px;
    padding-left: 10px;
    padding-top: 7px;
    width: 200px;
  }

  #slider > div:nth-child(2) {
    padding-top: 3px;
    padding-left: 5px;
  }

#info {
  border-radius: 30px;
}

#inst {
  color: black;
  display: flex;
  justify-content: space-evenly;
}

#inst > div {
  display: flex;
}

#inst > div:nth-child(1) > div {
    width: 20px;
    height: 20px;
    border: solid;
    border-width: 1px;
    background-color: white;
  }

  #inst > div:nth-child(2) > div {
    width: 20px;
    height: 20px;
    border: solid;
    border-width: 1px;
    background-color: black;
  }

  #inst > div:nth-child(3) > p {
    margin: 0px;
    display: flex;
}

#popCount {
  display: block;
  width: 50px;
  text-align: center;
}

#board {
  margin: auto;
  background-color: black;
  cursor: grab;
}

.cell {
  border: solid;
  border-color: #94949E;
  border-width: 1px;
}

.modal-dialog {
    width: 50%;
    color: black;
    margin-top: 75px;
    margin-left: auto;
    margin-right: auto;
  }

  .modal-header {
    background-color: #CDCDDD;
  }

  .modal-body {
    height: auto;
    min-height: 405px;
    background-color: black;
    color: #CDCDDD;
  }

  .modal-footer {
    background-color: #CDCDDD;
    border-radius: 5px;
}

.modal-body {
  display: flex;
  flex-direction: column;
}

.modal-body > div {
  text-align: center;
  display: block;
  margin: auto;  
}