$fn=64;

// Dimensions for A6 Portrait Sign Holder
base_width = 115;
base_depth = 45;
base_height = 15;
corner_radius = 4;

// Slot dimensions (A6 paper width is 105mm)
slot_width = 107;
slot_thickness = 2.5; // Fits cardstock or laminated paper
slot_depth = 12;
slot_angle = 10; // Tilt backwards for easy reading

difference() {
    // Main base body
    hull() {
        for (x = [-1, 1]) {
            for (y = [-1, 1]) {
                translate([
                    x * (base_width/2 - corner_radius),
                    y * (base_depth/2 - corner_radius),
                    0
                ])
                cylinder(r=corner_radius, h=base_height);
            }
        }
    }
    
    // Angled slot cutout
    translate([0, 0, base_height])
        rotate([slot_angle, 0, 0])
        translate([-slot_width/2, -slot_thickness/2, -slot_depth])
        cube([slot_width, slot_thickness, slot_depth + 20]);
}