* {
    box-sizing: border-box;
}

body {
    display: grid;
    grid-template-columns: 1fr 1fr 1fr;
    gap: 5px;
    background-color: hsl(180, 1%, 37%);
}

#middle-container {
    text-align: center;
}

#gameboard {
    margin: auto;
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    width: min(90vw, 450px);
    aspect-ratio: 1 / 1;
    gap: 3px;
}

.square {
    height: 148px;
    display: flex;
    flex-direction: column;
    text-align: center;
    justify-content: center;

    font-family: monospace, sans-serif;
    font-size: clamp(6rem, 9rem, 10rem);
    color: hsl(0, 0%, 85%);
    background-color: hsl(0, 0%, 6%);
    border-radius: 10px;
}

#reset-btn {
    margin-top: 15px;
    width: 55%;
    height: 50px;
    font-size: 32px;
    background-color: hsl(209, 39%, 20%);
    color: hsl(0, 92%, 61%);
    border-color: hsl(0, 100%, 50%);
}

#reset-btn:hover {
    background-color: hsl(209, 39%, 25%);
    color: hsl(0, 92%, 67%);
    border-color: hsl(0, 100%, 58%);
}

#reset-btn:active {
    background-color: hsl(209, 39%, 12%);
    color: hsl(0, 92%, 53%);
    border-color: hsl(0, 100%, 42%);
}

#first-container {
    display: flex;
    flex-direction: column;
    text-align: center;
}

#title {
    margin-top: 0;
    font-family: monospace;
    font-size: clamp(3rem, 4.3rem, 9rem);
}

#scores-container {
    margin-bottom: 15px;
    display: flex;
    flex-direction: column;
}

#game-mode-label {
    font-family: monospace;
    font-size: 17px;
    color: whitesmoke;
}

#player-score, #cpu-score {
    font-family: monospace;
    font-size: clamp(1rem, 3rem, 5rem);
}

#player-score {
    color: hsl(240, 100%, 64%);
}

#cpu-score {
    color: hsl(0, 98%, 64%);
}

#player-counter, #cpu-counter {
    color: white;
}

#back-btn {
    background-color: hsl(180, 11%, 14%);
    color: hsl(0, 0%, 96%);
    border: 1px solid hsl(0, 0%, 96%);
    width: 250px;
    height: 40px;
}

#back-btn:hover {
    background-color: hsl(180, 11%, 18%);
    color: hsl(0, 0%, 99%);
    border: 1px solid hsl(0, 0%, 99%);
}

#back-btn:active {
    background-color: hsl(180, 11%, 10%);
    color: hsl(0, 0%, 92%);
    border: 1px solid hsl(0, 0%, 92%);
}

@media (max-width: 600px) {
    body {
        display: flex;
        flex-direction: column-reverse;
    }

    #gameboard {
        width: min(85vw, 450px)
    }

    .square {
        height: 106px;
        font-size: 6rem;
    }

    #title {
        font-size: 3rem;
    }
}

@media screen and (orientation: landscape) and (max-width: 800px) {
    body {
        display: flex;
        flex-direction: row;
        height: 1vh;
    }

    #gameboard {
        width: 348px;
        height: 100%;
    }

    .square {
        height: 114px;
    }

    #middle-container {
        display: flex;
        flex-direction: row-reverse;
    }

    #title {
        font-size: 2.5rem;
    }

    #reset-btn {
        position: absolute;
        top: 60px;
        right: -15px;
        width: 20%;
        height: 25px;
        font-size: 16px;
        rotate: 90deg;
    }
}