* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --bg-color: #091540; 
    --bg-color-elements: #fff;
    --color-elements: #000;
    --color-link: #fff;
}

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

/* main container */
.container {
    width: 100vw;
    height: 100vh;

    display: grid;
    grid-template-rows: 0.5fr 3fr 0.5fr 2fr;
    grid-template-columns: 1fr 1fr 1fr;
}

.box-header {
    grid-row-start: 1;
    grid-column-start: 2;
    justify-self: center;
    align-self: center;

    display: grid;
    color: white;
    border-bottom: 1px solid #fff;
}

.box-player1 {
    grid-row-start: 2;
    grid-column-start: 1;
}

.box-player2 {
    grid-row-start: 2;
}

.box-player1,
.box-player2 {
    justify-self: center;
    align-self: center;

    display: grid;

    border-radius: 2px;
    height: 80%;
    width: 90%;
    font-size: 2rem;
    background-color: var(--bg-color-elements);
    color: var(--color-elements);
}

.box-player1-top-section,
.box-player2-top-section {
    display: grid;
    grid-template-columns: 1fr 1fr;
    align-items: center;
}

.player1-label-text,
.player2-label-text {
    justify-self: center;
}

.player1-label-sign,
.player2-label-sign {
    justify-self: center;
}

.box-player1-mid-section,
.box-player2-mid-section {
    display: grid;
    grid-template-columns: 1fr 2fr 1fr;
    align-items: center;

    border-top: 1px solid black;
}

.player1-label-name,
.player2-label-name {
    justify-self: center;
}

.player1-input,
.player2-input {
    width: 100%;
    height: 50%;
    font-size: 1.8rem;
    padding: 0.5rem;
}

.player1-button,
.player2-button {
    height: 50%;
    width: 50%;

    font-size: 1.3rem;
}

.box-player1-bottom-section,
.box-player2-bottom-section {
    display: grid;
    grid-template-rows: 1fr 1fr;
    grid-template-columns: 1fr 1fr 1fr;
    justify-items: center;
    align-items: center;
}

.player1-wins-label,
.player2-wins-label {
    align-self: end;
    font-size: 1.5rem;
}

.player1-draws-label,
.player2-draws-label {
    grid-row-start: 1;
    grid-column-start: 2;
    align-self: end;
    font-size: 1.5rem;
}

.player1-lost-label,
.player2-lost-label {
    grid-row-start: 1;
    grid-column-start: 3;
    align-self: end;
    font-size: 1.5rem;
}

.player1-wins-value,
.player2-wins-value {
    align-self: start;
}

.player1-draws-value,
.player2-draws-value {
    align-self: start;
}

.player1-lost-value,
.player2-lost-value {
    align-self: start;
}

/* gameboard section */
.box-board {
    justify-items: center;
    display: grid;

    grid-column-start: 2;
    grid-row-start: 2;

    height: 100%;
}

/* gameboard */
.board {
    align-self: center;
    display: grid;
    grid-template-columns: 1fr 1fr 1fr;
    grid-template-rows: 1fr 1fr 1fr;

    width: 90%;
    height: 90%;
}

.btn {
    background-color: white;
    font-size: 4rem;
}

.btn:hover {
    background-color: rgb(214, 211, 213);
}

.box-game-restart {
    grid-row-start: 3;
    grid-column-start: 2;
    justify-self: center;
    align-self: center;

    display: grid;
    grid-template-columns: 1fr 1fr;

    width: 80%;
    height: 60%;
}

.restart-button,
.new-game-button {
    justify-self: center;

    width: 80%;
    font-size: 1.2rem;
    background-color: #fff;
    border-radius: 5px;
    transition: transform 0.4s;
}

.restart-button:hover {
    background-color: #f1efef;
    transform: scale(1.05);
}

.new-game-button:hover {
    background-color: #f1efef;
    transform: scale(1.05);
}

.box-game-info {
    justify-self: center;
    align-self: start;
    grid-row-start: 4;
    grid-column-start: 2;

    display: grid;
    justify-content: center;
    align-content: center;

    height: 70%;
    width: 100%;

    font-size: 2rem;
    border-radius: 2px;
    text-align: center;
    color: var(--color-elements);
    background-color: var(--bg-color-elements);
    padding: 0.5rem;
}

.box-game-info-text {
    text-align: center;

}

.box-reference {
    grid-row-start: 4;
    grid-column-start: 3;
    align-self: center;
    justify-self: end;
    padding-right: 2rem;
}

a {
    color: var(--color-link);
}

@media screen and (max-width: 1000px) {
    .container {
        grid-template-rows: 0.3fr 1fr 1fr 1fr 0.1fr;
        grid-template-columns: 1fr 1fr;
        padding-left: 1rem;
    }

    .box-header {
        grid-row-start: 1;
        grid-column-start: 1;
    }

    .box-player1 {
        grid-row-start: 2;
        grid-column-start: 1;
    }

    .box-board {
        grid-row-start: 1;
        grid-row-end: 4;
        grid-column-start: 2;

        width: 100%;
        height: 100%;
    }

    .box-player2 {
        grid-row-start: 3;
        grid-column-start: 1;

    }

    .box-game-restart {
        grid-row-start: 4;
        grid-column-start: 2;

        height: 70%;
    }

    .box-game-info {
        grid-column-start: 1;
        grid-row-start: 4;

        justify-self: center;
        align-self: center;
    }

    .box-reference {
        grid-column-start: 2;
        grid-row-start: 5;
    }
}

@media screen and (max-width: 800px) {
    .box-player1 {
        font-size: 1.5rem;
    }
    .box-player2 {
        font-size: 1.5rem;
    }
    .box-game-info {
        font-size: 1.5rem;
    }
}

@media screen and (max-width: 550px) {
    .box-player1-top-section,
    .box-player2-top-section {
        grid-template-columns: 2fr 1fr;
    }

    .box-board {
        height: 80%;
        align-self: center;
    }

    .player1-wins-label,
    .player1-draws-label,
    .player2-wins-label,
    .player2-draws-label {
        border-right: 1px solid rgb(145, 143, 143);
    }
}