/* Retro 8-bit Style Guidelines */
:root {
    --bg-color: #9BBD40;
    --game-area-color: #8BAE47;
    --snake-color: #000000;
    --food-color: #FF0000;
    --border-color: #000000;
    --font-family: 'Press Start 2P', 'Courier New', monospace;
}

* {
    box-sizing: border-box;
    -webkit-tap-highlight-color: transparent;
}

body {
    font-family: var(--font-family);
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    margin: 0;
    padding: 10px;
    background-color: var(--bg-color);
    overflow: hidden; /* Prevent scrolling during play */
    image-rendering: pixelated;
}

#gameWrapper {
    width: 100%;
    max-width: 650px;
    display: flex;
    flex-direction: column;
    align-items: center;
}

#gameContainer {
    width: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 20px;
    background-color: var(--bg-color);
    border: 4px solid var(--border-color);
    box-shadow: 4px 4px 0px rgba(0,0,0,0.2);
    position: relative;
}

/* Header UI */
#gameHeader {
    display: flex;
    justify-content: space-between;
    align-items: center;
    width: 100%;
    max-width: 600px;
    margin-bottom: 15px;
    color: var(--border-color);
    font-size: 16px;
    letter-spacing: 1px;
}

#pauseBtn {
    background-color: transparent;
    border: 2px solid var(--border-color);
    color: var(--border-color);
    font-family: var(--font-family);
    font-size: 12px;
    padding: 8px 12px;
    cursor: pointer;
    box-shadow: 2px 2px 0px var(--border-color);
    transition: transform 0.1s;
}

#pauseBtn:active {
    transform: translate(2px, 2px);
    box-shadow: none;
}

/* Canvas Area */
#canvasWrapper {
    position: relative;
    width: 100%;
    max-width: 600px;
    aspect-ratio: 1;
    border: 4px solid var(--border-color);
    background-color: var(--game-area-color);
    box-shadow: inset 4px 4px 8px rgba(0,0,0,0.1);
}

#gameCanvas {
    width: 100%;
    height: 100%;
    display: block;
    image-rendering: crisp-edges;
}

/* Score Display */
#score, #level {
    text-shadow: 2px 2px 0px rgba(0,0,0,0.1);
}

#highScores {
    margin-bottom: 20px;
    font-size: 12px;
    color: var(--border-color);
}

/* Controls - Cross Layout */
#controls {
    margin-top: 25px;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 10px;
}

.control-row {
    display: flex;
    gap: 10px;
}

.controlBtn {
    width: 60px;
    height: 60px;
    background-color: #556B2F;
    color: var(--border-color);
    border: 3px solid var(--border-color);
    border-radius: 8px; /* Slightly rounded, still retro */
    font-size: 20px;
    display: flex;
    justify-content: center;
    align-items: center;
    cursor: pointer;
    box-shadow: 0 4px 0 #2d3a19;
    transition: all 0.1s;
    user-select: none;
}

.controlBtn:active, .controlBtn.active-touch {
    transform: translateY(4px);
    box-shadow: 0 0 0 #2d3a19;
    background-color: #4a5e29;
}

/* Pause Overlay */
#pauseOverlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(139, 174, 71, 0.8); /* Semi-transparent game green */
    display: none;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    z-index: 10;
}

.pause-content {
    background-color: var(--bg-color);
    border: 4px solid var(--border-color);
    padding: 20px;
    text-align: center;
    box-shadow: 8px 8px 0 rgba(0,0,0,0.2);
}

.pause-content h2 {
    margin: 0 0 15px 0;
    font-size: 24px;
}

.pause-content p {
    font-size: 12px;
    line-height: 1.5;
    margin: 0;
}

/* Mobile Responsiveness */
@media screen and (max-width: 600px) {
    #gameContainer {
        padding: 10px;
        border-width: 2px;
    }

    #gameHeader {
        font-size: 12px;
        margin-bottom: 10px;
    }

    #canvasWrapper {
        border-width: 2px;
    }
    
    .controlBtn {
        width: 50px;
        height: 50px;
        font-size: 16px;
    }
}

@media screen and (max-width: 400px) {
    .controlBtn {
        width: 45px;
        height: 45px;
    }
    
    #gameHeader {
        flex-wrap: wrap;
        gap: 5px;
        justify-content: center;
    }
    
    #pauseBtn {
        order: 3;
    }
}