$fn=64;

// --- Parameters ---
card_width = 70;
card_length = 120;
tolerance = 4;             // Extra space for sleeves and easy insertion
wall_thickness = 2.5;      // Sturdy walls for 3D printing
bottom_thickness = 2;
tray_height = 40;          // Capacity height of the card stack
finger_cutout_radius = 25; // Size of the side grab cutouts

// --- Calculated Dimensions ---
int_w = card_width + tolerance;
int_l = card_length + tolerance;
out_w = int_w + (wall_thickness * 2);
out_l = int_l + (wall_thickness * 2);
out_h = tray_height + bottom_thickness;

// --- Model ---
difference() {
    // Outer shell
    translate([-out_w/2, -out_l/2, 0])
        cube([out_w, out_l, out_h]);

    // Inner cavity
    translate([-int_w/2, -int_l/2, bottom_thickness])
        cube([int_w, int_l, tray_height + 1]);

    // Side finger cutouts (Left & Right)
    // Placed slightly below the top edge to expose more of the card sides
    translate([0, 0, out_h - 5])
        rotate([0, 90, 0])
        cylinder(h=out_w + 2, r=finger_cutout_radius, center=true);

    // Bottom push hole (helps remove the last few cards and saves filament)
    translate([0, 0, -1])
        cylinder(h=bottom_thickness + 2, r=25);
}