body {
    margin: 0;
    padding: 0;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    background-color: #f0f0f0;
    overflow: hidden; /* Prevent browser scrolling */
}

#canvas-container {
    box-shadow: 0 0 10px rgba(0, 0, 0, 0.3);
    height: 100%;
    width: 100%;
    position: relative;
    overflow: hidden;
    /* Enable hardware acceleration */
    transform: translateZ(0);
    backface-visibility: hidden;
    perspective: 1000;
    will-change: transform;
    /* Ensure canvas is visible */
    background-color: black;
    min-height: 600px;
    min-width: 800px;
}

/* Style both upper and lower canvas */
.upper-canvas, .lower-canvas {
    position: absolute !important;
    left: 0;
    top: 0;
    width: 100% !important;
    height: 100% !important;
    user-select: none;
    cursor: default;
    /* Enable hardware acceleration for canvas layers */
    transform: translateZ(0);
    backface-visibility: hidden;
    perspective: 1000;
    will-change: transform;
    /* Improve image rendering */
    image-rendering: optimizeSpeed;
    image-rendering: -moz-crisp-edges;
    image-rendering: -webkit-optimize-contrast;
    image-rendering: optimize-contrast;
    -ms-interpolation-mode: nearest-neighbor;
}

/* Prevent text selection and default behaviors during panning */
#canvas-container, canvas {
    -webkit-user-select: none;
    -moz-user-select: none;
    -ms-user-select: none;
    user-select: none;
    -webkit-user-drag: none;
    user-drag: none;
}

/* Ensure cursor styles work */
.upper-canvas.grabbing, .lower-canvas.grabbing {
    cursor: grabbing !important;
}

.upper-canvas.grab, .lower-canvas.grab {
    cursor: grab !important;
}

/* AutoCAD-style controls */
.autocad-controls {
    position: absolute;
    bottom: 10px;
    left: 10px;
    display: flex;
    gap: 5px;
    z-index: 1000;
}

.autocad-controls button {
    background: rgba(40, 40, 40, 0.9);
    color: #e0e0e0;
    border: 1px solid #606060;
    padding: 6px 12px;
    border-radius: 3px;
    cursor: pointer;
    font-size: 11px;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    font-weight: 500;
    transition: all 0.2s ease;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.autocad-controls button:hover {
    background: rgba(60, 60, 60, 0.9);
    border-color: #808080;
    color: #ffffff;
}

#logo {
    position: fixed;       /* stays in the top-left even when scrolling */
    top: 25px;             /* space from the top edge */
    left: 25px;            /* space from the left edge */
    height: 60px;          /* adjust as needed */
    z-index: 1000;         /* ensures it stays on top of the canvas */
    user-select: none;     /* prevent accidental selection */
    pointer-events: none;  /* clicks pass through to canvas */
}


.autocad-controls button:active {
    background: rgba(80, 80, 80, 0.9);
    border-color: #a0a0a0;
    transform: translateY(1px);
}

.autocad-controls button:focus {
    outline: 2px solid #0078d4;
    outline-offset: 1px;
}
#canvas,
#canvas-container,
canvas,
.fabirc-canvas,
.fabirc-canvas.upper-canvas,
.fabirc-canvas.lower-canvas {
  cursor: none !important;

}