$fn = 64;

// --- Parameters ---
holder_width = 80;      // Total width of the holder
holder_depth = 45;      // Total depth of the base
holder_height = 25;     // Maximum height
corner_radius = 3;      // Radius for rounded edges

slot_width = 2.5;       // Thickness of the card slot
slot_depth = 15;        // How deep the card sits in the holder
slot_angle = 15;        // Tilt angle (degrees)
slot_margin = 8;        // Margin on the sides of the slot

module card_holder() {
    difference() {
        // Main Body: Extruded and rounded profile
        rotate([90, 0, 90])
        linear_extrude(height=holder_width, center=true)
        offset(r=corner_radius)
        polygon([
            [corner_radius, corner_radius], // Bottom front
            [holder_depth - corner_radius, corner_radius], // Bottom back
            [holder_depth - corner_radius, holder_height - corner_radius], // Top back
            [holder_depth * 0.55, holder_height - corner_radius], // Top flat edge
            [corner_radius, holder_height * 0.35] // Angled front lip
        ]);

        // Card Slot: Angled cutout
        translate([0, holder_depth * 0.75, holder_height])
        rotate([-slot_angle, 0, 0])
        translate([0, 0, -slot_depth/2 + 1])
        hull() {
            // Left rounded edge of the slot
            translate([-(holder_width - slot_margin*2)/2 + slot_width/2, 0, 0])
                cylinder(d=slot_width, h=slot_depth + 2, center=true);
            // Right rounded edge of the slot
            translate([(holder_width - slot_margin*2)/2 - slot_width/2, 0, 0])
                cylinder(d=slot_width, h=slot_depth + 2, center=true);
        }
    }
}

// Render the object
card_holder();