body {
    margin: 0;
    padding: 0;
    width: 100vw;
    height: 100vh;
}
h1, h2, h3, h4 {
    margin: 10px 0;
    text-align: center;
}
#board {
    display: flex;
    flex-wrap: wrap;
    width: 100%;
    height: 100%;
    justify-content: space-evenly;
    align-items: center;
    background-color: #b5b4b1;
}
#board > .overlay {
    width: 100%;
    height: 100%;
    position: absolute;
    background: rgba(0, 0, 0, 0.45);
}
#board > .row {
    display: flex;
    width: 100%;
    justify-content: space-evenly;
}
#board > .row > .tile {
    border-radius: 10px;
    background-color: rgb(203, 201, 195);
    justify-content: center;
    align-items: center;
    display: flex;
    font-size: 45px;
    height: 100%;
}

#start {
    background: rgba(67, 235, 67, 0.80);
    display: flex;
    justify-content: space-evenly;
}
.size > label {
    font-size: 15px;
}
.size > input {
  -ms-transform: scale(1.5);
  -moz-transform: scale(1.5);
  -webkit-transform: scale(1.5);
  -o-transform: scale(1.5);
  transform: scale(1.5);
  padding: 10px;
  margin-bottom: 10px;
}
.startbtn {
    width: 35%;
    border: 1px solid black;
    height: 75%;
    border-radius: 10px;
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: 30px;
}
.startbtn:hover {
    cursor: pointer;
    border: 1px solid white;
    background: rgba(67, 235, 67, 0.80);
}
#start > #bot {
    justify-content: space-around;
}
#start > #bot > #info {
    position: absolute;
    left: 10px;
    top: 50%;
    margin-top: -40px;
    justify-content: center;
    height: 80px;
    display: flex;
    flex-direction: column;
    color: darkgreen;
}
#start > #bot > #info > div {
    width: 80px;
    display: flex;
    justify-content: space-between;
}
#start > #bot > .row {
    width: 50%;
    align-items: center;
}
#start > #bot > .row:nth-child(even) {
    border: 1px solid black;
}
#start > #bot > #info > div > em:last-child {
    width: 50%;
}

.death {
    background: rgba(235, 67, 67, 0.80);
}
.death > h2 {
    width: 300px;
    margin: 15px;
    border-bottom: 1px solid black;
    padding: 15px 0 15px 0;
}
.drow {
    width: 300px;
    display: flex;
    justify-content: space-between;
}

.flx {
    display: flex;
    align-items: center;
    justify-content: space-evenly;
}
.col {
    flex-direction: column;
}
.fw {
    width: 100%;
}
.fh {
    height: 100%;
}
.hidden {
    display: none !important;
}
.btn {
    background: orange;
    padding: 10px 30px;
    font-size: 20px;
    margin: 10px 0 0 0;
    border: 1px solid black;
    border-radius: 10px;
    display: flex;
    justify-content: center;
}
.popup {
    width: 450px;
    height: 300px;
    position: fixed;
    top: 50%;
    left: 50%;
    margin: -150px 0 0 -225px;
    display: flex;
    align-items: center;
    flex-direction: column;
    border: 1px solid black;
    border-radius: 10px;
}
.flash {
    animation: flasher .25s linear infinite;
}
@keyframes flasher {
    50% {
        opacity: .5;
    }
}