@import url('https://fonts.googleapis.com/css2?family=Fira+Code:wght@300;400;500;600;700&display=swap');

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Fira Code', monospace;
}

body {
    height: 100vh;
    width: 100vw;
    background: linear-gradient(90deg, rgb(33, 46, 40) 0%, rgba(0, 212, 255, 1) 100%);
}

.board {
    display: grid;
    width: 100%;
    height: 100%;
    display: grid;
    justify-content: center;
    align-content: center;
    justify-items: center;
    align-items: center;
    grid-template-columns: repeat(3, auto);
}

.board.x .cell:not(.x):not(.circle):hover::after,
.board.x .cell:not(.x):not(.circle):hover::before,
.board.circle .cell:not(.x):not(.circle):hover::after,
.board.circle .cell:not(.x):not(.circle):hover::before {
    background: rgba(255, 255, 255, 0.3) !important;
}

.cell {
    width: 100px;
    height: 100px;
    border: 2px solid white;
    display: flex;
    justify-content: center;
    align-items: center;
    position: relative;
}

.cell.x,
.cell.circle {
    cursor: not-allowed;
}

.cell:nth-child(1),
.cell:nth-child(2),
.cell:nth-child(3) {
    border-top: none;
}

.cell:nth-child(1),
.cell:nth-child(4),
.cell:nth-child(7) {
    border-left: none;
}

.cell:nth-child(7),
.cell:nth-child(8),
.cell:nth-child(9) {
    border-bottom: none;
}

.cell:nth-child(3),
.cell:nth-child(6),
.cell:nth-child(9) {
    border-right: none;
}

/* X */

.cell.x::before,
.cell.x::after,
.board.x .cell:not(.x):not(.circle):hover::after,
.board.x .cell:not(.x):not(.circle):hover::before {
    content: "";
    height: calc(100px * 0.15);
    width: calc(100px * 0.9);
    background: white;
    position: absolute;
}

.cell.x::before,
.board.x .cell:not(.x):not(.circle):hover::before {
    transform: rotate(45deg);
}

.cell.x::after,
.board.x .cell:not(.x):not(.circle):hover::after {
    transform: rotate(-45deg);
}

/* Circle */

.cell.circle::before,
.cell.circle::after,
.board.circle .cell:not(.x):not(.circle):hover::after,
.board.circle .cell:not(.x):not(.circle):hover::after {
    content: "";
    height: calc(100px * 0.9);
    width: calc(100px * 0.9);
    background: white;
    position: absolute;
    border-radius: 50%;
}

/* mensagem de vitória */

.winner {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    justify-content: center;
    align-items: center;
    background-color: rgba(0, 0, 0, 0.8);
    flex-direction: column;
}

.btn-winner {
    font-size: 2em;
    background-color: rgba(65, 185, 131, 1);
    padding: 10px 5px;
    cursor: pointer;
    border-radius: 5px;
    border: none;
    margin-top: 16px;
    color: white;
    transition: 0.6s;
    font-weight: 600;
}

.btn-winner:hover {
    background-color: rgba(0, 212, 255, 1);
    color: rgb(255, 255, 255);
}

.winner-msg {
    color: white;
    font-size: 3em;
    text-align: center;
    font-weight: 700;
}

.show-winner-msg {
    display: flex;
    font-weight: 700;
}