@import url('https://fonts.googleapis.com/css2?family=Knewave&display=swap');
@import url('https://fonts.googleapis.com/css2?family=Playfair+Display:wght@500&display=swap');

:root{
    --box-size: 20vmin;
    --box-shadow: 1vmin;
    --box-border-clr: #519259;
    --O-clr: #F0BB62;
    --X-clr: #a8e0d1;
    --O-X-font: 'Knewave', cursive;
    --my-clr: #F0BB62;
    --opponent-clr: #a8e0d1;
    --body-bg: #064635;
    --cursor: not-allowed;
}

*{
    font-family: 'Playfair Display', serif;
    transition: 1s ease-in-out;
}

html{
    margin: 0;
}

body{
    background: var(--body-bg);
}

.notification{
    position: absolute;
    top: 10%;
    left: 50%;
    transform: translate(-50%, 0);
    text-align: center;
}

.game{
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    display: grid;
    grid-template-columns: auto auto auto;
    padding: 2em;
    
}

.frosted-glass{
    position: absolute;
    top: 0;
    left: 0;
    height: 100%;
    width: 100%;
    border-radius: 1em;
    box-shadow: 0 0 1rem 0 rgba(0, 0, 0, .3); 
    background: inherit;
    overflow: hidden;
    z-index: -1;
}

.frosted-glass::before{
    content: "";
    position: absolute;
    background: inherit;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: -1;
    background: var(--body-bg);
}

.frosted-glass::after{
    content: "";
    position: absolute;
    background: inherit;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: -1;
    box-shadow: inset 0 0 2000px rgba(255, 255, 255, 0.5);
    filter: blur(10px);
    margin: -20px;
}

O{
    color: var(--O-clr);
    font-family: var(--O-X-font);
}

X{
    color: var(--X-clr);
    font-family: var(--O-X-font);
}

.block{
    cursor: var(--cursor);
    position: relative;
    height: var(--box-size);
    width: var(--box-size);
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: calc(var(--box-size) * 0.2);
    font-weight: 900;
    color: #F5EEDC;
    transition: 1s ease-in-out;
}
.cell-0{
    box-shadow: inset calc(var(--box-shadow)*-1) calc(var(--box-shadow)*-1) 0 var(--box-border-clr);
}
.cell-2{
    box-shadow: inset var(--box-shadow) calc(var(--box-shadow)*-1) 0 var(--box-border-clr);
}
.cell-4{
    box-shadow: 0 0 0 var(--box-shadow) var(--box-border-clr);
}
.cell-8{
    box-shadow: inset var(--box-shadow) var(--box-shadow) 0 var(--box-border-clr);
}
.cell-6{
    box-shadow: inset calc(var(--box-shadow)*-1) var(--box-shadow) 0 var(--box-border-clr);
}


blink{
    animation: blink 2s linear infinite;
}

@keyframes blink {
    0%{
        opacity: 0;
    }
    50%{
        opacity: 1;
    }
    100%{
        opacity: 0;
    }
}

.isitmyturn{
    user-select: none;
    position: absolute;
    top: -2em;
    left: 50%;
    transform: translate(-50%, 0);
    color: white;
    visibility: hidden;
    transition: none;
}