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

html, 
body{
    height: 100%;
    width: 100%;
}

:root{
    /* background colors */
    --bg--primary-color: #111111;
    --text--primary-color: #f9f9f9;
    --bg-fill-color: #f4f4f4;
    --bg-food-color: #ff4757;

    /* button colors */
    --btn-bg-color: #D7D6CB;
    --btn-text-color: #121212;
    --btn-border-color: #121212;

    /* retro shadow */
    --btn-shadow-sm: 0.125rem;
    --btn-shadow-lg: 0.25rem;

    /* motion */
    --btn-transition-fast: 200ms;

    /* font */
    --btn-font-family: 'Jersey 10', sans-serif;
    --btn-font-size: 1.1rem;

    --space-xs: 4px;
    --space-sm: 8px;
    --space-md: 16px;
    --space-lg: 24px;
    --space-xl: 32px;
    --space-2xl: 40px;
    --space-3xl: 48px;
    

    /* border colors */
    --border-primary-color: #333333;
    --border-radius-xs: 4px;
    --border-radius-sm: 8px;
    --border-radius-md: 12px;
    --border-radius-lg: 16px;
    --border-radius-xl: 20px;
    --border-radius-2xl: 24px;
}

html{
    background-color: var(--bg--primary-color);
    color: var(--text--primary-color);
    font-family: system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 'Open Sans', 'Helvetica Neue', sans-serif;
}

main, section{
    width: 100%;
    height: 100%;
}

.btn{
    /* typography */
    font-family: var(--btn-font-family);
    font-size: var(--btn-font-size);
    letter-spacing: 0.5px;

    /* layout */
    padding: var(--space-sm) var(--space-md);

    /* colors */
    background-color: var(--btn-bg-color);
    color: var(--btn-text-color);

    /* border */
    border: 2px solid var(--btn-border-color);
    border-radius: var(--border-radius-sm);

    /* pressed by default */
    box-shadow: 
        var(--btn-shadow-sm) 
        var(--btn-shadow-sm) 
        var(--btn-border-color);

    transform: translate(
        var(--btn-shadow-sm),
        var(--btn-shadow-sm)
    );

    cursor: pointer;

    transition:
        transform var(--btn-transition-fast) ease,
        box-shadow var(--btn-transition-fast) ease;
}

/* hover = pop up */
.btn:hover{
    transform: translate(0, 0);
    box-shadow:
        var(--btn-shadow-lg)
        var(--btn-shadow-lg)
        var(--btn-border-color);
}


section{
    padding: var(--space-2xl);
    display: flex;
    flex-direction: column;
    gap: var(--space-lg);
    height: 100%;
}

section .infos{
    width: 100%;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.info{
    padding: var(--space-sm) var(--space-md);
    border: 1px solid var(--border-primary-color);
    border-radius: var(--border-radius-sm);
}
.board{
    border: 1px solid var(--border-primary-color);
    flex-grow: 1;
    border-radius: var(--border-radius-xs);
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(50px, 1fr) );
    grid-template-rows: repeat(auto-fill, minmax(50px, 1fr) );
}


.block {
    border: 1px solid var(--border-primary-color);
    border-radius: 10%;
}

.fill{
    background-color: var(--bg-fill-color);
}

.food{
    background-color: var(--bg-food-color);
}

.modal{
    height: 100vh;
    width: 100vw;
    position: fixed;
    top: 0;
    background-color: #35353587;
    backdrop-filter: blur(2px);
    display: flex;
    justify-content: center;
    align-items: center;    
}

.modal .start-game,
.modal .game-over{
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-lg);
}
.modal .game-over{
    display: none;
}

@media (max-width: 480px) {
    .info h3 {
        font-size: 12px;  /* smaller text */
    }
    .info {
        padding: 4px 8px;  /* smaller box */
    }
    section {
        padding: 16px; /* reduce section padding */
        gap: 8px; /* reduce spacing between elements */
    }

    .board {
        grid-template-columns: repeat(auto-fill, minmax(25px, 1fr));
        grid-template-rows: repeat(auto-fill, minmax(25px, 1fr));
    }

    .block {
        border-width: 1px;  /* thinner border for small blocks */
    }
}

.head {
    background-color: #A8DF8E;
}