@import url('https://fonts.googleapis.com/css?family=Mandali|Raleway:900&display=swap');

input[type="radio"],
input[type="checkbox"] {
    position: absolute;
    top: -9999em;
}

#menu {
    display: block;
    background: rgba(0, 0, 0, 0.8);
    text-align: center;
}

#menu>div {
    background: #fff;
    padding: 1rem 2rem;
    border-radius: 10px;
}

.toggle-group {
    display: flex;
}

.toggle-group span {
    flex: 1;
    text-align: left;
}

.toggle-group span:nth-of-type(1) {
    text-align: right;
}

.toggle {
    display: inline-block;
    width: 3rem;
    height: 1.5rem;
    background: #ddd;
    vertical-align: bottom;
    margin: 0.33rem 0.5rem;
    border-radius: 1rem;
    position: relative;
    cursor: pointer;
}

.toggle::before {
    content: "";
    position: absolute;
    display: block;
    width: 1rem;
    height: 1rem;
    top: 0.25rem;
    left: 0.25rem;
    background: #000;
    background: #004974;
    border-radius: 100%;
    transition: left 0.25s, background-color 0.25s;
}

.btn {
    width: 100%;
    display: inline-block;
    background: #000;
    color: #fff;
    border-radius: 5px;
    margin-top: 2rem;
    padding: 0.33rem;
    box-sizing: border-box;
    cursor: pointer;
    transition: background-color 0.25s;
}

.btn:hover {
    background: #333;
}

#start:checked~form #menu {
    display: none;
}

#difficulty:checked~form #menu label[for=difficulty]::before,
#sound:checked~form #menu label[for=sound]::before,
#first:checked~form #menu label[for=first]::before {
    left: 1.75rem;
    background: #a60011;
}

h1 {
    margin: 0 0 0.5rem 0;
    text-align: center;
    white-space: nowrap;
    color: #004974;
}

h2 {
    font-size: 0.9rem;
    text-transform: uppercase;
    margin: 1.25rem 0 0.1rem 0;
    color: #a60011;
}

html,
body {
    font-family: Mandali, Arial, sans-serif;
    font-size: 16px;
}

.center {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
}

#board {
    width: 50vmin;
    height: 50vmin;
    display: grid;
    grid-template-columns: 1fr 1fr 1fr;
    grid-template-rows: 1fr 1fr 1fr;
}

.tile {
    margin: 5%;
    position: relative;
}

.tile label,
.tile div {
    display: block;
    height: 100%;
    width: 100%;
    position: absolute;
    top: 0;
    left: 0;
    background: rgba(0, 0, 0, 0.10);
    font-family: Raleway, Courier, 'Courier New', Sans, sans-serif;
    font-weight: bolder;
}

.tile div {
    display: none;
    overflow: hidden;
    text-shadow: 0 1px 6px rgba(0, 0, 0, 0.85)
}

@keyframes shadow {
    from {
        box-shadow: 0 0 0 0 rgba(255, 0, 0, 0);
    }

    to {
        box-shadow: 0 0 10px 4px rgba(255, 0, 0, 0.35);
    }
}

#label-computer {
    width: 200px;
    max-width: 50vmin;
    position: absolute;
    top: 80%;
    top: calc(50% + 30vmin);
    left: 50%;
    transform: translate(-50%, -50%);
    text-align: center;
    animation: shadow 0.75s infinite alternate;
}

@keyframes beginnerAnimation {
    from {
        z-index: 9;
    }

    to {
        z-index: 1;
    }
}

#label-computer label {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    display: block;
    animation: beginnerAnimation 0.9s infinite;
}

#label-computer label:active {
    position: static !important;
    margin-left: 100% !important;
    background: none !important;
    font-size: 0;
}

#label-computer label:active::before {
    content: "";
    position: absolute;
    top: 0;
    right: -50px;
    left: 0;
    bottom: 0;
    z-index: 101;
}

#label-computer label:nth-child(1) {
    animation-delay: -0.1s;
}

#label-computer label:nth-child(2) {
    animation-delay: -0.2s;
}

#label-computer label:nth-child(3) {
    animation-delay: -0.3s;
}

#label-computer label:nth-child(4) {
    animation-delay: -0.4s;
}

#label-computer label:nth-child(5) {
    animation-delay: -0.5s;
}

#label-computer label:nth-child(6) {
    animation-delay: -0.6s;
}

#label-computer label:nth-child(7) {
    animation-delay: -0.7s;
}

#label-computer label:nth-child(8) {
    animation-delay: -0.8s;
}

#label-computer label:nth-child(9) {
    animation-delay: 0s;
}


/* Special cases */
#cell-0-x:checked~#cell-4-x:checked~#cell-8-o:checked~#label-computer label[for='cell-2-o'],
#cell-0-x:checked~#cell-4-x:checked~#cell-8-o:checked~#label-computer label[for='cell-6-o'],
#cell-2-x:checked~#cell-4-x:checked~#cell-6-o:checked~#label-computer label[for='cell-0-o'],
#cell-2-x:checked~#cell-4-x:checked~#cell-6-o:checked~#label-computer label[for='cell-8-o'],
#cell-2-o:checked~#cell-4-x:checked~#cell-6-x:checked~#label-computer label[for='cell-0-o'],
#cell-2-o:checked~#cell-4-x:checked~#cell-6-x:checked~#label-computer label[for='cell-8-o'],
#cell-0-o:checked~#cell-4-x:checked~#cell-8-x:checked~#label-computer label[for='cell-2-o'],
#cell-0-o:checked~#cell-4-x:checked~#cell-8-x:checked~#label-computer label[for='cell-6-o'] {
    z-index: 65;
    animation: none;
}

@keyframes miniAnimation {
    from {
        z-index: 75;
    }

    to {
        z-index: 72;
    }
}

#cell-0-o:not(:checked)~#cell-2-o:not(:checked)~#cell-4-x:checked~#cell-6-o:not(:checked)~#cell-8-o:not(:checked)~#label-computer label[for='cell-0-o'],
#cell-0-o:not(:checked)~#cell-2-o:not(:checked)~#cell-4-x:checked~#cell-6-o:not(:checked)~#cell-8-o:not(:checked)~#label-computer label[for='cell-2-o'],
#cell-0-o:not(:checked)~#cell-2-o:not(:checked)~#cell-4-x:checked~#cell-6-o:not(:checked)~#cell-8-o:not(:checked)~#label-computer label[for='cell-6-o'],
#cell-0-o:not(:checked)~#cell-2-o:not(:checked)~#cell-4-x:checked~#cell-6-o:not(:checked)~#cell-8-o:not(:checked)~#label-computer label[for='cell-8-o'] {
    z-index: 75;
    animation: miniAnimation 0.4s infinite linear;
}

#cell-0-o:not(:checked)~#cell-2-o:not(:checked)~#cell-4-x:checked~#cell-6-o:not(:checked)~#cell-8-o:not(:checked)~#label-computer label[for='cell-0-o'] {
    animation-delay: -0.3s;
}

#cell-0-o:not(:checked)~#cell-2-o:not(:checked)~#cell-4-x:checked~#cell-6-o:not(:checked)~#cell-8-o:not(:checked)~#label-computer label[for='cell-2-o'] {
    animation-delay: -0.2s;
}

#cell-0-o:not(:checked)~#cell-2-o:not(:checked)~#cell-4-x:checked~#cell-6-o:not(:checked)~#cell-8-o:not(:checked)~#label-computer label[for='cell-6-o'] {
    animation-delay: -0.1s;
}



#difficulty:checked~form #cell-0-x:checked~#cell-4-o:checked~#cell-8-x:checked~#label-computer label[for='cell-1-o'],
#difficulty:checked~form #cell-0-x:checked~#cell-4-o:checked~#cell-8-x:checked~#label-computer label[for='cell-3-o'],
#difficulty:checked~form #cell-0-x:checked~#cell-4-o:checked~#cell-8-x:checked~#label-computer label[for='cell-5-o'],
#difficulty:checked~form #cell-0-x:checked~#cell-4-o:checked~#cell-8-x:checked~#label-computer label[for='cell-7-o'],
#difficulty:checked~form #cell-2-x:checked~#cell-4-o:checked~#cell-6-x:checked~#label-computer label[for='cell-1-o'],
#difficulty:checked~form #cell-2-x:checked~#cell-4-o:checked~#cell-6-x:checked~#label-computer label[for='cell-3-o'],
#difficulty:checked~form #cell-2-x:checked~#cell-4-o:checked~#cell-6-x:checked~#label-computer label[for='cell-5-o'],
#difficulty:checked~form #cell-2-x:checked~#cell-4-o:checked~#cell-6-x:checked~#label-computer label[for='cell-7-o'],
#difficulty:checked~form #cell-1-x:checked~#cell-3-x:checked~#cell-4-o:checked~#label-computer label[for='cell-0-o'],
#difficulty:checked~form #cell-1-x:checked~#cell-3-x:checked~#cell-4-o:checked~#label-computer label[for='cell-2-o'],
#difficulty:checked~form #cell-1-x:checked~#cell-3-x:checked~#cell-4-o:checked~#label-computer label[for='cell-6-o'],
#difficulty:checked~form #cell-1-x:checked~#cell-4-o:checked~#cell-5-x:checked~#label-computer label[for='cell-0-o'],
#difficulty:checked~form #cell-1-x:checked~#cell-4-o:checked~#cell-5-x:checked~#label-computer label[for='cell-2-o'],
#difficulty:checked~form #cell-1-x:checked~#cell-4-o:checked~#cell-5-x:checked~#label-computer label[for='cell-8-o'],
#difficulty:checked~form #cell-3-x:checked~#cell-4-o:checked~#cell-7-x:checked~#label-computer label[for='cell-0-o'],
#difficulty:checked~form #cell-3-x:checked~#cell-4-o:checked~#cell-7-x:checked~#label-computer label[for='cell-6-o'],
#difficulty:checked~form #cell-3-x:checked~#cell-4-o:checked~#cell-7-x:checked~#label-computer label[for='cell-8-o'],
#difficulty:checked~form #cell-4-o:checked~#cell-5-x:checked~#cell-7-x:checked~#label-computer label[for='cell-2-o'],
#difficulty:checked~form #cell-4-o:checked~#cell-5-x:checked~#cell-7-x:checked~#label-computer label[for='cell-6-o'],
#difficulty:checked~form #cell-4-o:checked~#cell-5-x:checked~#cell-7-x:checked~#label-computer label[for='cell-8-o'] {
    z-index: 70;
    animation: none;
}

/* Prevent other player from winning! */
#difficulty:checked~form #cell-1-x:checked~#cell-2-x:checked~#label-computer label[for='cell-0-o'],
#difficulty:checked~form #cell-3-x:checked~#cell-6-x:checked~#label-computer label[for='cell-0-o'],
#difficulty:checked~form #cell-4-x:checked~#cell-8-x:checked~#label-computer label[for='cell-0-o'],
#difficulty:checked~form #cell-0-x:checked~#cell-2-x:checked~#label-computer label[for='cell-1-o'],
#difficulty:checked~form #cell-4-x:checked~#cell-7-x:checked~#label-computer label[for='cell-1-o'],
#difficulty:checked~form #cell-0-x:checked~#cell-1-x:checked~#label-computer label[for='cell-2-o'],
#difficulty:checked~form #cell-5-x:checked~#cell-8-x:checked~#label-computer label[for='cell-2-o'],
#difficulty:checked~form #cell-4-x:checked~#cell-6-x:checked~#label-computer label[for='cell-2-o'],
#difficulty:checked~form #cell-0-x:checked~#cell-6-x:checked~#label-computer label[for='cell-3-o'],
#difficulty:checked~form #cell-4-x:checked~#cell-5-x:checked~#label-computer label[for='cell-3-o'],
#difficulty:checked~form #cell-2-x:checked~#cell-8-x:checked~#label-computer label[for='cell-5-o'],
#difficulty:checked~form #cell-3-x:checked~#cell-4-x:checked~#label-computer label[for='cell-5-o'],
#difficulty:checked~form #cell-0-x:checked~#cell-3-x:checked~#label-computer label[for='cell-6-o'],
#difficulty:checked~form #cell-2-x:checked~#cell-4-x:checked~#label-computer label[for='cell-6-o'],
#difficulty:checked~form #cell-7-x:checked~#cell-8-x:checked~#label-computer label[for='cell-6-o'],
#difficulty:checked~form #cell-1-x:checked~#cell-4-x:checked~#label-computer label[for='cell-7-o'],
#difficulty:checked~form #cell-6-x:checked~#cell-8-x:checked~#label-computer label[for='cell-7-o'],
#difficulty:checked~form #cell-0-x:checked~#cell-4-x:checked~#label-computer label[for='cell-8-o'],
#difficulty:checked~form #cell-2-x:checked~#cell-5-x:checked~#label-computer label[for='cell-8-o'],
#difficulty:checked~form #cell-6-x:checked~#cell-7-x:checked~#label-computer label[for='cell-8-o'] {
    z-index: 80 !important;
    animation: none;
}

/* if winning move, take it! */
#difficulty:checked~form #cell-1-o:checked~#cell-2-o:checked~#label-computer label[for='cell-0-o'],
#difficulty:checked~form #cell-3-o:checked~#cell-6-o:checked~#label-computer label[for='cell-0-o'],
#difficulty:checked~form #cell-4-o:checked~#cell-8-o:checked~#label-computer label[for='cell-0-o'],
#difficulty:checked~form #cell-0-o:checked~#cell-2-o:checked~#label-computer label[for='cell-1-o'],
#difficulty:checked~form #cell-4-o:checked~#cell-7-o:checked~#label-computer label[for='cell-1-o'],
#difficulty:checked~form #cell-0-o:checked~#cell-1-o:checked~#label-computer label[for='cell-2-o'],
#difficulty:checked~form #cell-5-o:checked~#cell-8-o:checked~#label-computer label[for='cell-2-o'],
#difficulty:checked~form #cell-4-o:checked~#cell-6-o:checked~#label-computer label[for='cell-2-o'],
#difficulty:checked~form #cell-0-o:checked~#cell-6-o:checked~#label-computer label[for='cell-3-o'],
#difficulty:checked~form #cell-4-o:checked~#cell-5-o:checked~#label-computer label[for='cell-3-o'],
#difficulty:checked~form #cell-2-o:checked~#cell-8-o:checked~#label-computer label[for='cell-5-o'],
#difficulty:checked~form #cell-3-o:checked~#cell-4-o:checked~#label-computer label[for='cell-5-o'],
#difficulty:checked~form #cell-0-o:checked~#cell-3-o:checked~#label-computer label[for='cell-6-o'],
#difficulty:checked~form #cell-2-o:checked~#cell-4-o:checked~#label-computer label[for='cell-6-o'],
#difficulty:checked~form #cell-7-o:checked~#cell-8-o:checked~#label-computer label[for='cell-6-o'],
#difficulty:checked~form #cell-1-o:checked~#cell-4-o:checked~#label-computer label[for='cell-7-o'],
#difficulty:checked~form #cell-6-o:checked~#cell-8-o:checked~#label-computer label[for='cell-7-o'],
#difficulty:checked~form #cell-0-o:checked~#cell-4-o:checked~#label-computer label[for='cell-8-o'],
#difficulty:checked~form #cell-2-o:checked~#cell-5-o:checked~#label-computer label[for='cell-8-o'],
#difficulty:checked~form #cell-6-o:checked~#cell-7-o:checked~#label-computer label[for='cell-8-o'] {
    z-index: 99 !important;
    animation: none;
}

/* get center in first move */
#difficulty:checked~form #label-computer label[for='cell-4-o'] {
    z-index: 100;
    animation: none;
}

#label-computer,
input:checked~input:checked~#label-computer,
input:checked~input:checked~input:checked~input:checked~#label-computer,
input:checked~input:checked~input:checked~input:checked~input:checked~input:checked~#label-computer,
input:checked~input:checked~input:checked~input:checked~input:checked~input:checked~input:checked~input:checked~#label-computer {
    display: none;
}

input:checked~#label-computer,
input:checked~input:checked~input:checked~#label-computer,
input:checked~input:checked~input:checked~input:checked~input:checked~#label-computer,
input:checked~input:checked~input:checked~input:checked~input:checked~input:checked~input:checked~#label-computer {
    display: block;
}

label[for$='-x'],
input:checked~input:checked~#board label[for$='-x'],
input:checked~input:checked~input:checked~input:checked~#board label[for$='-x'],
input:checked~input:checked~input:checked~input:checked~input:checked~input:checked~#board label[for$='-x'],
input:checked~input:checked~input:checked~input:checked~input:checked~input:checked~input:checked~input:checked~#board label[for$='-x'] {
    z-index: 1;
}

input:checked~#board label[for$='-x'],
input:checked~input:checked~input:checked~#board label[for$='-x'],
input:checked~input:checked~input:checked~input:checked~input:checked~#board label[for$='-x'],
input:checked~input:checked~input:checked~input:checked~input:checked~input:checked~input:checked~#board label[for$='-x'] {
    z-index: -1;
}


#first:checked~form #label-computer,
#first:checked~form input:checked~input:checked~#label-computer,
#first:checked~form input:checked~input:checked~input:checked~input:checked~#label-computer,
#first:checked~form input:checked~input:checked~input:checked~input:checked~input:checked~input:checked~#label-computer,
#first:checked~form input:checked~input:checked~input:checked~input:checked~input:checked~input:checked~input:checked~input:checked~#label-computer {
    display: block;
}

#first:checked~form input:checked~#label-computer,
#first:checked~form input:checked~input:checked~input:checked~#label-computer,
#first:checked~form input:checked~input:checked~input:checked~input:checked~input:checked~#label-computer,
#first:checked~form input:checked~input:checked~input:checked~input:checked~input:checked~input:checked~input:checked~#label-computer {
    display: none;
}

#first:checked~form label[for$='-x'],
#first:checked~form input:checked~input:checked~#board label[for$='-x'],
#first:checked~form input:checked~input:checked~input:checked~input:checked~#board label[for$='-x'],
#first:checked~form input:checked~input:checked~input:checked~input:checked~input:checked~input:checked~#board label[for$='-x'],
#first:checked~form input:checked~input:checked~input:checked~input:checked~input:checked~input:checked~input:checked~input:checked~#board label[for$='-x'] {
    z-index: -1;
}

#first:checked~form input:checked~#board label[for$='-x'],
#first:checked~form input:checked~input:checked~input:checked~#board label[for$='-x'],
#first:checked~form input:checked~input:checked~input:checked~input:checked~input:checked~#board label[for$='-x'],
#first:checked~form input:checked~input:checked~input:checked~input:checked~input:checked~input:checked~input:checked~#board label[for$='-x'] {
    z-index: 1;
}




input[id*='-0-']:checked~div label[for*='-0-'],
input[id*='-1-']:checked~div label[for*='-1-'],
input[id*='-2-']:checked~div label[for*='-2-'],
input[id*='-3-']:checked~div label[for*='-3-'],
input[id*='-4-']:checked~div label[for*='-4-'],
input[id*='-5-']:checked~div label[for*='-5-'],
input[id*='-6-']:checked~div label[for*='-6-'],
input[id*='-7-']:checked~div label[for*='-7-'],
input[id*='-8-']:checked~div label[for*='-8-'] {
    display: none !important;
}

input[id*='-0-']:checked~#board #tile-0 div,
input[id*='-1-']:checked~#board #tile-1 div,
input[id*='-2-']:checked~#board #tile-2 div,
input[id*='-3-']:checked~#board #tile-3 div,
input[id*='-4-']:checked~#board #tile-4 div,
input[id*='-5-']:checked~#board #tile-5 div,
input[id*='-6-']:checked~#board #tile-6 div,
input[id*='-7-']:checked~#board #tile-7 div,
input[id*='-8-']:checked~#board #tile-8 div {
    display: block;
}

input[id*='-0-x']:checked~#board #tile-0 div::before,
input[id*='-1-x']:checked~#board #tile-1 div::before,
input[id*='-2-x']:checked~#board #tile-2 div::before,
input[id*='-3-x']:checked~#board #tile-3 div::before,
input[id*='-4-x']:checked~#board #tile-4 div::before,
input[id*='-5-x']:checked~#board #tile-5 div::before,
input[id*='-6-x']:checked~#board #tile-6 div::before,
input[id*='-7-x']:checked~#board #tile-7 div::before,
input[id*='-8-x']:checked~#board #tile-8 div::before {
    content: "X";
    background: #004974;
    color: #89dcf6;
}

input[id*='-0-o']:checked~#board #tile-0 div::before,
input[id*='-1-o']:checked~#board #tile-1 div::before,
input[id*='-2-o']:checked~#board #tile-2 div::before,
input[id*='-3-o']:checked~#board #tile-3 div::before,
input[id*='-4-o']:checked~#board #tile-4 div::before,
input[id*='-5-o']:checked~#board #tile-5 div::before,
input[id*='-6-o']:checked~#board #tile-6 div::before,
input[id*='-7-o']:checked~#board #tile-7 div::before,
input[id*='-8-o']:checked~#board #tile-8 div::before {
    content: "O";
    background: #a60011;
    color: #ffc7b5;
}

.tile label:hover {
    cursor: pointer;
    background: rgba(0, 0, 0, 0.25);
}

.tile label::before,
.tile div::before {
    color: #000;
    position: absolute;
    text-align: center;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    font-size: 7.5vmin;
    font-weight: bold;
}

.tile div::before {
    padding: 100%;
}

.tile label[for$='-o']:hover::before {
    content: "O";
}

.tile label[for$='-x']:hover::before {
    content: "X";
}

#tile-0 {
    grid-column: 1;
    grid-row: 1;
}

#tile-0 label,
#tile-0 div {
    border-radius: 10% 0 0 0;
}

#tile-1 {
    grid-column: 2;
    grid-row: 1;
}

#tile-2 {
    grid-column: 3;
    grid-row: 1;
}

#tile-2 label,
#tile-2 div {
    border-radius: 0 10% 0 0;
}

#tile-3 {
    grid-column: 1;
    grid-row: 2;
}

#tile-4 {
    grid-column: 2;
    grid-row: 2;
}

#tile-5 {
    grid-column: 3;
    grid-row: 2;
}

#tile-6 {
    grid-column: 1;
    grid-row: 3;
}

#tile-6 label,
#tile-6 div {
    border-radius: 0 0 0 10%;
}

#tile-7 {
    grid-column: 2;
    grid-row: 3;
}

#tile-8 {
    grid-column: 3;
    grid-row: 3;
}

#tile-8 label,
#tile-8 div {
    border-radius: 0 0 10% 0;
}

.scrim {
    background: rgba(255, 255, 255, 0.85);
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    display: none;
    z-index: 9;
}

#message {
    text-align: center;
    font-size: 2rem;
    line-height: 2.2rem;
    font-weight: bold;
}

#message::before {
    content: "Tied game!"
}

#message input {
    background: #000;
    color: #fff;
    font-size: 1rem;
    padding: 0.5rem 1.75rem;
    margin: auto auto;
    margin-top: 2rem;
}

input:checked~input:checked~input:checked~input:checked~input:checked~input:checked~input:checked~input:checked~input:checked~#end,
#cell-0-x:checked~#cell-1-x:checked~#cell-2-x:checked~#end,
#cell-3-x:checked~#cell-4-x:checked~#cell-5-x:checked~#end,
#cell-6-x:checked~#cell-7-x:checked~#cell-8-x:checked~#end,
#cell-0-x:checked~#cell-3-x:checked~#cell-6-x:checked~#end,
#cell-1-x:checked~#cell-4-x:checked~#cell-7-x:checked~#end,
#cell-2-x:checked~#cell-5-x:checked~#cell-8-x:checked~#end,
#cell-0-x:checked~#cell-4-x:checked~#cell-8-x:checked~#end,
#cell-2-x:checked~#cell-4-x:checked~#cell-6-x:checked~#end,
#cell-0-o:checked~#cell-1-o:checked~#cell-2-o:checked~#end,
#cell-3-o:checked~#cell-4-o:checked~#cell-5-o:checked~#end,
#cell-6-o:checked~#cell-7-o:checked~#cell-8-o:checked~#end,
#cell-0-o:checked~#cell-3-o:checked~#cell-6-o:checked~#end,
#cell-1-o:checked~#cell-4-o:checked~#cell-7-o:checked~#end,
#cell-2-o:checked~#cell-5-o:checked~#cell-8-o:checked~#end,
#cell-0-o:checked~#cell-4-o:checked~#cell-8-o:checked~#end,
#cell-2-o:checked~#cell-4-o:checked~#cell-6-o:checked~#end {
    display: block;
}

#cell-0-x:checked~#cell-1-x:checked~#cell-2-x:checked~#end #message::before,
#cell-3-x:checked~#cell-4-x:checked~#cell-5-x:checked~#end #message::before,
#cell-6-x:checked~#cell-7-x:checked~#cell-8-x:checked~#end #message::before,
#cell-0-x:checked~#cell-3-x:checked~#cell-6-x:checked~#end #message::before,
#cell-1-x:checked~#cell-4-x:checked~#cell-7-x:checked~#end #message::before,
#cell-2-x:checked~#cell-5-x:checked~#cell-8-x:checked~#end #message::before,
#cell-0-x:checked~#cell-4-x:checked~#cell-8-x:checked~#end #message::before,
#cell-2-x:checked~#cell-4-x:checked~#cell-6-x:checked~#end #message::before {
    content: "Player won!";
}

#cell-0-o:checked~#cell-1-o:checked~#cell-2-o:checked~#end #message::before,
#cell-3-o:checked~#cell-4-o:checked~#cell-5-o:checked~#end #message::before,
#cell-6-o:checked~#cell-7-o:checked~#cell-8-o:checked~#end #message::before,
#cell-0-o:checked~#cell-3-o:checked~#cell-6-o:checked~#end #message::before,
#cell-1-o:checked~#cell-4-o:checked~#cell-7-o:checked~#end #message::before,
#cell-2-o:checked~#cell-5-o:checked~#cell-8-o:checked~#end #message::before,
#cell-0-o:checked~#cell-4-o:checked~#cell-8-o:checked~#end #message::before,
#cell-2-o:checked~#cell-4-o:checked~#cell-6-o:checked~#end #message::before {
    content: "Computer won!";
}