/* GameBoy Color Palette */
:root {
    --gb-lightest: #9bbc0f;  /* RGB: 155, 188, 15 */
    --gb-light: #8bac0f;     /* RGB: 139, 172, 15 */
    --gb-dark: #306230;      /* RGB: 48, 98, 48 */
    --gb-darkest: #0f380f;   /* RGB: 15, 56, 15 */
}

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

body {
    background-color: #1a1a1a;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    margin: 0;
    padding: 0;
    overflow: hidden;
    font-family: 'Courier New', monospace;
    color: var(--gb-lightest);
}

#game-container {
    display: flex;
    justify-content: center;
    align-items: center;
    width: 100vw;
    height: 100vh;
    padding: 10px;
}

#gameCanvas {
    /* Canvas internal resolution: 160×144 (aspect ratio 10:9) */
    /* Fill window while maintaining aspect ratio and integer scaling */
    max-width: 100%;
    max-height: 100%;
    width: auto;
    height: auto;

    /* Calculate size to fit window with integer scaling */
    object-fit: contain;

    /* CRITICAL: Pixel-perfect rendering - prevents blurry edges */
    image-rendering: -moz-crisp-edges;
    image-rendering: -webkit-crisp-edges;
    image-rendering: pixelated;
    image-rendering: crisp-edges;
    -ms-interpolation-mode: nearest-neighbor;

    /* Subtle border */
    border: 4px solid var(--gb-darkest);
    box-shadow: 0 0 20px rgba(155, 188, 15, 0.3);
}

/* Prevent text selection and context menu during gameplay */
canvas {
    -webkit-user-select: none;
    -moz-user-select: none;
    user-select: none;
}

/* Mobile Touch Controls */
#mobile-controls {
    display: none;
    position: fixed;
    bottom: 20px;
    left: 0;
    right: 0;
    padding: 0 20px;
    justify-content: space-between;
    align-items: flex-end;
    pointer-events: none;
    z-index: 100;
}

/* Show controls on touch devices - multiple detection methods for reliability */
@media (pointer: coarse), (any-pointer: coarse), (hover: none) and (max-width: 1024px) {
    #mobile-controls {
        display: flex;
    }

    #game-container {
        height: calc(100vh - 180px);
        align-items: flex-start;
        padding-top: 20px;
    }
}

/* Ensure controls are visible on small screens regardless of pointer type */
@media (max-width: 768px) and (max-height: 1024px) {
    #mobile-controls {
        display: flex;
    }

    #game-container {
        height: calc(100vh - 180px);
        align-items: flex-start;
        padding-top: 20px;
    }
}

/* D-Pad Container */
#dpad {
    display: grid;
    grid-template-columns: 60px 60px 60px;
    grid-template-rows: 60px 60px;
    gap: 4px;
    pointer-events: auto;
}

/* D-Pad Buttons */
.dpad-btn {
    width: 60px;
    height: 60px;
    background-color: var(--gb-dark);
    border: 3px solid var(--gb-darkest);
    border-radius: 8px;
    color: var(--gb-lightest);
    font-size: 24px;
    cursor: pointer;
    display: flex;
    justify-content: center;
    align-items: center;
    -webkit-user-select: none;
    user-select: none;
    touch-action: manipulation;
}

.dpad-btn:active {
    background-color: var(--gb-darkest);
    transform: scale(0.95);
}

/* Position D-Pad buttons */
#btn-up {
    grid-column: 2;
    grid-row: 1;
}

#btn-left {
    grid-column: 1;
    grid-row: 2;
}

#btn-right {
    grid-column: 3;
    grid-row: 2;
}

#btn-down {
    grid-column: 2;
    grid-row: 2;
}

/* Action Button (Start/Pause) */
#btn-action {
    width: 80px;
    height: 80px;
    background-color: var(--gb-dark);
    border: 3px solid var(--gb-darkest);
    border-radius: 50%;
    color: var(--gb-lightest);
    font-family: 'Courier New', monospace;
    font-size: 12px;
    font-weight: bold;
    cursor: pointer;
    pointer-events: auto;
    -webkit-user-select: none;
    user-select: none;
    touch-action: manipulation;
}

#btn-action:active {
    background-color: var(--gb-darkest);
    transform: scale(0.95);
}

/* Smaller controls for very small screens */
@media (max-height: 600px) {
    #mobile-controls {
        bottom: 10px;
    }

    #game-container {
        height: calc(100vh - 140px);
        padding-top: 10px;
    }

    #dpad {
        grid-template-columns: 50px 50px 50px;
        grid-template-rows: 50px 50px;
        gap: 3px;
    }

    .dpad-btn {
        width: 50px;
        height: 50px;
        font-size: 20px;
    }

    #btn-action {
        width: 65px;
        height: 65px;
        font-size: 10px;
    }
}