/* ── Reset & base ─────────────────────────────────────────────────────────── */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    background: #0a0a0a;
    color: #c9d1c9;
    font-family: 'Press Start 2P', monospace;
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    overflow: hidden;
}

/* ── Game wrapper ─────────────────────────────────────────────────────────── */
.game-wrapper {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 12px;
    padding: 16px;
}

/* ── Canvas container ────────────────────────────────────────────────────── */
.canvas-container {
    position: relative;
    display: inline-block;
    border: 2px solid #1e3a1e;
    box-shadow:
        0 0 0 1px #0a180a,
        0 0 20px rgba(68, 255, 136, 0.08);
}

/* ── Scan lines overlay ──────────────────────────────────────────────────── */
.canvas-container::after {
    content: '';
    position: absolute;
    inset: 0;
    background: repeating-linear-gradient(
        to bottom,
        transparent            1px,
        transparent            2px,
        rgba(65, 66, 66, 0.18)   2px,
        rgba(0, 0, 0, 0.18)   3px
    );
    pointer-events: none;
    z-index: 10;
}

canvas {
    display: block;
    background: #0a0a0a;
    cursor: crosshair;
    /* pixel-art rendering (if needed) */
    image-rendering: pixelated;
    image-rendering: crisp-edges;
}

canvas:focus {
    outline: none;
}

/* ── Fullscreen button ───────────────────────────────────────────────────── */
#fullscreenBtn {
    position: absolute;
    top: 8px;
    right: 8px;
    width: 32px;
    height: 32px;
    background: rgba(0, 0, 0, 0.55);
    border: 1px solid #2a2a2a;
    border-radius: 4px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0.4;
    transition: opacity 0.2s;
    color: #aaa;
    padding: 0;
}

#fullscreenBtn:hover {
    opacity: 1;
}

#fullscreenBtn svg {
    width: 16px;
    height: 16px;
}

/* Show the right icon depending on fullscreen state */
.canvas-container:not(.is-fullscreen) .icon-compress { display: none; }
.canvas-container.is-fullscreen      .icon-expand    { display: none; }

/* ── Fullscreen mode ─────────────────────────────────────────────────────── */
.canvas-container.is-fullscreen {
    position: fixed;
    inset: 0;
    width: 100vw;
    height: 100vh;
    border: none;
    box-shadow: none;
    background: #000;
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 9999;
}

.canvas-container.is-fullscreen canvas {
    max-width: 100vw;
    max-height: 100vh;
}