diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 01dcfd1..3d747a2 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -7,10 +7,13 @@ on:
 
 jobs:
   test:
-    runs-on: ubuntu-${{ matrix.ubuntu }}
+    runs-on: ${{ matrix.os }}
     strategy:
       matrix:
-        ubuntu: ["22.04", "24.04"]
+        include:
+          - os: ubuntu-22.04
+          - os: ubuntu-24.04
+          - os: windows-latest
 
     steps:
       - uses: actions/checkout@v4
@@ -20,19 +23,25 @@ jobs:
         with:
           python-version: "3.11"
 
-      - name: Install test deps
+      - name: Install test deps (Linux)
+        if: runner.os == 'Linux'
         run: |
           pip install pytest
-          sudo apt-get install -y bats shellcheck inkscape
+          sudo apt-get install -y shellcheck inkscape
 
-      - name: Python unit tests
-        run: pytest tests/test_merge_prefs.py -v
+      - name: Install test deps (Windows)
+        if: runner.os == 'Windows'
+        run: pip install pytest
 
-      - name: Shellcheck
+      - name: Shellcheck (Linux only)
+        if: runner.os == 'Linux'
         run: |
           shellcheck install.sh
           shellcheck uninstall.sh
           shellcheck scripts/detect_platform.sh
 
-      - name: Bats integration tests
-        run: bats tests/test_install.bats
+      - name: Python unit tests
+        run: pytest tests/test_merge_prefs.py -v
+
+      - name: Python integration tests
+        run: pytest tests/test_install.py -v
diff --git a/assets/illuscape.ico b/assets/illuscape.ico
new file mode 100644
index 0000000..bf2e81d
Binary files /dev/null and b/assets/illuscape.ico differ
diff --git a/install.py b/install.py
new file mode 100644
index 0000000..dae54b9
--- /dev/null
+++ b/install.py
@@ -0,0 +1,288 @@
+#!/usr/bin/env python3
+"""
+Illuscape installer — cross-platform (Linux, Windows, macOS).
+
+Usage:
+    python3 install.py [--preset=cc|cs6] [--yes]
+    ./install.sh [--preset=cc|cs6] [--yes]   (Linux / macOS)
+"""
+from __future__ import annotations
+
+import argparse
+import datetime
+import os
+import platform
+import re
+import shutil
+import subprocess
+import sys
+from pathlib import Path
+
+# Ensure scripts/ is importable regardless of cwd
+SCRIPT_DIR = Path(__file__).parent
+sys.path.insert(0, str(SCRIPT_DIR / "scripts"))
+
+from detect_platform import detect_config  # noqa: E402
+
+ICON_SIZES = (16, 32, 48, 64, 128, 256, 512)
+
+
+# ── Dependency check ──────────────────────────────────────────────────────────
+
+def check_deps(auto_yes: bool) -> None:
+    """Verify Inkscape is present and meets the minimum version."""
+    if not shutil.which("inkscape"):
+        sys.exit("✗ Inkscape is not installed. Install Inkscape first, then run Illuscape.")
+
+    try:
+        raw = subprocess.run(
+            ["inkscape", "--version"],
+            capture_output=True, text=True, timeout=10,
+        ).stdout
+    except (FileNotFoundError, subprocess.TimeoutExpired):
+        return  # cannot check version — proceed anyway
+
+    match = re.search(r"(\d+)\.(\d+)", raw)
+    if match:
+        major, minor = int(match.group(1)), int(match.group(2))
+        if major < 1 or (major == 1 and minor < 2):
+            version = f"{major}.{minor}"
+            print(f"⚠ Inkscape {version} detected. Illuscape targets Inkscape 1.2+.")
+            print("  Some settings may not apply correctly. Continue anyway? [y/N]")
+            if not auto_yes and input().strip().lower() != "y":
+                sys.exit(0)
+
+
+# ── Backup ────────────────────────────────────────────────────────────────────
+
+def backup_config(config_path: Path) -> None:
+    """Copy the config directory to a timestamped backup; idempotent on repeat runs."""
+    timestamp = datetime.datetime.now().strftime("%Y%m%d-%H%M%S")
+    backup_dir = Path(str(config_path) + f".bak-illuscape-{timestamp}")
+
+    existing = sorted(config_path.parent.glob(config_path.name + ".bak-illuscape-*"))
+    if existing:
+        print("→ Backup already exists — skipping (idempotent)")
+        return
+
+    if config_path.is_dir():
+        shutil.copytree(config_path, backup_dir)
+        print(f"→ Backed up to: {backup_dir}")
+    else:
+        print("→ No existing config to back up (fresh install)")
+
+
+# ── Preset selection ──────────────────────────────────────────────────────────
+
+def choose_preset(preset: str, auto_yes: bool) -> str:
+    """Prompt the user for CC / CS6 unless preset is already provided."""
+    if preset:
+        return preset
+
+    print()
+    print("Which Illustrator era are you coming from?")
+    print("  [1] CC — current Creative Cloud (default)")
+    print("  [2] CS6 — last perpetual license")
+    print("Choice [1]: ", end="", flush=True)
+    if auto_yes:
+        print("1 (auto)")
+        return "cc"
+    choice = input().strip()
+    return "cs6" if choice == "2" else "cc"
+
+
+# ── Preferences merge ─────────────────────────────────────────────────────────
+
+def merge_prefs(config_path: Path, preset: str) -> None:
+    """Invoke merge_prefs.py to upsert the preferences patch into Inkscape's prefs."""
+    subprocess.run(
+        [
+            sys.executable,
+            str(SCRIPT_DIR / "scripts/merge_prefs.py"),
+            "--prefs", str(config_path / "preferences.xml"),
+            "--patch", str(SCRIPT_DIR / "config/preferences-patch.xml"),
+            "--preset", preset,
+        ],
+        check=True,
+    )
+
+
+# ── Config file copy ──────────────────────────────────────────────────────────
+
+def copy_files(config_path: Path, preset: str) -> None:
+    """Copy keys, palettes, templates, and symbols into the Inkscape config dir."""
+    for subdir in ("keys", "palettes", "templates", "symbols", "splashscreens"):
+        (config_path / subdir).mkdir(parents=True, exist_ok=True)
+
+    shutil.copy2(
+        SCRIPT_DIR / f"config/keys/illustrator-{preset}.xml",
+        config_path / "keys/",
+    )
+    for palette in (SCRIPT_DIR / "config/palettes").glob("*.gpl"):
+        shutil.copy2(palette, config_path / "palettes/")
+    for template in (SCRIPT_DIR / "config/templates").glob("*.svg"):
+        shutil.copy2(template, config_path / "templates/")
+    for symbol in (SCRIPT_DIR / "config/symbols").glob("*.svg"):
+        shutil.copy2(symbol, config_path / "symbols/")
+
+    print("→ Config files copied")
+
+
+# ── Desktop integration ───────────────────────────────────────────────────────
+
+def install_desktop(config_path: Path, install_method: str) -> None:
+    """Install a desktop launcher / Start Menu shortcut for the current platform."""
+    system = platform.system()
+    if system == "Linux" and install_method == "native":
+        _install_linux_desktop(config_path)
+    elif system == "Windows":
+        _install_windows_desktop(config_path)
+    # macOS: Inkscape.app handles its own dock icon; no extra step needed.
+
+
+def _install_linux_desktop(config_path: Path) -> None:
+    app_dir = Path.home() / ".local/share/applications"
+    icon_src = SCRIPT_DIR / "assets/illuscape.svg"
+    splash_src = SCRIPT_DIR / "assets/splash.svg"
+
+    app_dir.mkdir(parents=True, exist_ok=True)
+    shutil.copy2(SCRIPT_DIR / "assets/org.inkscape.Inkscape.desktop", app_dir)
+
+    for size in ICON_SIZES:
+        icon_dir = Path.home() / f".local/share/icons/hicolor/{size}x{size}/apps"
+        icon_dir.mkdir(parents=True, exist_ok=True)
+        icon_out = icon_dir / "illuscape.png"
+        if _rsvg_convert(icon_src, icon_out, size, size):
+            continue
+        if _inkscape_export(icon_src, icon_out, size, size):
+            continue
+        print(f"⚠ Could not rasterize icon at {size}px (install rsvg-convert for icons)")
+
+    splash_out = config_path / "splashscreens/illuscape-splash.png"
+    _rsvg_convert(splash_src, splash_out, 600, 400)
+
+    subprocess.run(
+        ["update-desktop-database", str(app_dir)],
+        capture_output=True,
+    )
+    print("→ Desktop launcher installed")
+
+
+def _install_windows_desktop(config_path: Path) -> None:
+    """
+    Create a Start Menu .lnk shortcut via PowerShell WScript.Shell COM object.
+    The ICO is copied to the config dir so it stays with the config.
+    """
+    ico_src = SCRIPT_DIR / "assets/illuscape.ico"
+    ico_dst = config_path / "illuscape.ico"
+
+    if ico_src.exists():
+        shutil.copy2(ico_src, ico_dst)
+
+    start_menu = (
+        Path(os.environ.get("APPDATA", ""))
+        / "Microsoft/Windows/Start Menu/Programs"
+    )
+    lnk_path = start_menu / "Illuscape.lnk"
+    inkscape_exe = shutil.which("inkscape") or "inkscape.exe"
+
+    # Build a PowerShell one-liner using WScript.Shell
+    ps_lines = [
+        "$ws = New-Object -ComObject WScript.Shell",
+        f"$s = $ws.CreateShortcut('{lnk_path}')",
+        f"$s.TargetPath = '{inkscape_exe}'",
+        "$s.Description = 'Inkscape with Illustrator-style config'",
+    ]
+    if ico_dst.exists():
+        ps_lines.append(f"$s.IconLocation = '{ico_dst}'")
+    ps_lines.append("$s.Save()")
+
+    try:
+        subprocess.run(
+            ["powershell", "-NoProfile", "-Command", "; ".join(ps_lines)],
+            check=True,
+            capture_output=True,
+            text=True,
+        )
+        print("→ Start Menu shortcut installed")
+    except (FileNotFoundError, subprocess.CalledProcessError) as exc:
+        print(f"⚠ Could not create Start Menu shortcut: {exc}")
+        print("  You can create one manually pointing to inkscape.exe.")
+
+
+# ── Icon rasterization helpers ────────────────────────────────────────────────
+
+def _rsvg_convert(src: Path, dst: Path, w: int, h: int) -> bool:
+    """Rasterize *src* SVG to *dst* PNG using rsvg-convert. Returns True on success."""
+    if not shutil.which("rsvg-convert"):
+        return False
+    result = subprocess.run(
+        ["rsvg-convert", "-w", str(w), "-h", str(h), str(src), "-o", str(dst)],
+        capture_output=True,
+    )
+    return result.returncode == 0
+
+
+def _inkscape_export(src: Path, dst: Path, w: int, h: int) -> bool:
+    """
+    Rasterize *src* SVG using Inkscape 1.x export flags.
+    (--export-png was removed in Inkscape 1.0)
+    """
+    result = subprocess.run(
+        [
+            "inkscape",
+            f"--export-filename={dst}",
+            "--export-type=png",
+            f"--export-width={w}",
+            f"--export-height={h}",
+            str(src),
+        ],
+        capture_output=True,
+    )
+    return result.returncode == 0
+
+
+# ── CLI ───────────────────────────────────────────────────────────────────────
+
+def _parse_args() -> argparse.Namespace:
+    p = argparse.ArgumentParser(description="Illuscape — Inkscape with Illustrator feel")
+    p.add_argument(
+        "--preset",
+        choices=["cc", "cs6"],
+        default="",
+        help="Illustrator shortcut era: cc (default) or cs6",
+    )
+    p.add_argument("--yes", "-y", action="store_true", help="Skip confirmation prompts")
+    return p.parse_args()
+
+
+def main() -> None:
+    args = _parse_args()
+
+    print("╔══════════════════════════════╗")
+    print("║       Illuscape Installer    ║")
+    print("╚══════════════════════════════╝")
+    print()
+
+    check_deps(args.yes)
+    config_path, install_method = detect_config()
+    print(f"→ Inkscape config: {config_path} ({install_method})")
+
+    backup_config(config_path)
+    preset = choose_preset(args.preset, args.yes)
+    print(f"→ Using preset: {preset}")
+
+    merge_prefs(config_path, preset)
+    copy_files(config_path, preset)
+    install_desktop(config_path, install_method)
+
+    print()
+    print(f"✓ Illuscape installed (preset: {preset})")
+    print()
+    print("  Open Inkscape to start using your Illustrator-style workspace.")
+    print("  To uninstall: python3 uninstall.py  (or ./uninstall.sh on Linux/macOS)")
+    print()
+
+
+if __name__ == "__main__":
+    main()
diff --git a/install.sh b/install.sh
index 538337a..1c56f4e 100755
--- a/install.sh
+++ b/install.sh
@@ -1,185 +1,6 @@
 #!/usr/bin/env bash
-# Illuscape installer
+# Illuscape installer — thin wrapper around install.py
 # Usage: ./install.sh [--preset=cc|cs6] [--yes]
 set -euo pipefail
-
 SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
-PRESET=""
-AUTO_YES=0
-
-# ── Parse args ──────────────────────────────────────────────────────────────
-for arg in "$@"; do
-    case "$arg" in
-        --preset=cc|--preset=cs6) PRESET="${arg#--preset=}" ;;
-        --yes|-y)                  AUTO_YES=1 ;;
-        --help|-h)
-            echo "Usage: ./install.sh [--preset=cc|cs6] [--yes]"
-            echo "  --preset=cc   Illustrator CC shortcuts (default)"
-            echo "  --preset=cs6  Illustrator CS6 shortcuts"
-            echo "  --yes         Skip confirmation prompts"
-            exit 0 ;;
-        *) echo "Unknown argument: $arg"; exit 1 ;;
-    esac
-done
-
-# ── Check dependencies ───────────────────────────────────────────────────────
-check_deps() {
-    if ! command -v inkscape &>/dev/null; then
-        echo "✗ Inkscape is not installed. Install Inkscape first, then run Illuscape."
-        exit 1
-    fi
-
-    local version
-    version=$(inkscape --version 2>/dev/null | grep -oP '\d+\.\d+' | head -1)
-    local major minor
-    IFS='.' read -r major minor <<< "$version"
-    # Skip version check if regex couldn't match (non-standard version string)
-    if [[ -n "$major" ]] && { (( major < 1 )) || (( major == 1 && minor < 2 )); }; then
-        echo "⚠ Inkscape $version detected. Illuscape targets Inkscape 1.2+."
-        echo "  Some settings may not apply correctly. Continue anyway? [y/N]"
-        [[ $AUTO_YES == 1 ]] || { read -r ans; [[ "$ans" =~ ^[Yy]$ ]] || exit 0; }
-    fi
-
-    if ! command -v python3 &>/dev/null; then
-        echo "✗ python3 is required. Install it and try again."
-        exit 1
-    fi
-}
-
-# ── Detect platform ──────────────────────────────────────────────────────────
-detect_config() {
-    source "$SCRIPT_DIR/scripts/detect_platform.sh"
-    echo "→ Inkscape config: $INKSCAPE_CONFIG ($INKSCAPE_INSTALL_METHOD)"
-}
-
-# ── Backup ───────────────────────────────────────────────────────────────────
-backup_config() {
-    local backup_dir="${INKSCAPE_CONFIG}.bak-illuscape-$(date +%Y%m%d-%H%M%S)"
-
-    # If any illuscape backup already exists, skip (idempotent)
-    if ls "${INKSCAPE_CONFIG}".bak-illuscape-* &>/dev/null; then
-        echo "→ Backup already exists — skipping (idempotent)"
-        return 0
-    fi
-
-    if [[ -d "$INKSCAPE_CONFIG" ]]; then
-        cp -r "$INKSCAPE_CONFIG" "$backup_dir"
-        echo "→ Backed up to: $backup_dir"
-    else
-        echo "→ No existing config to back up (fresh install)"
-    fi
-}
-
-# ── Prompt for preset ────────────────────────────────────────────────────────
-choose_preset() {
-    [[ -n "$PRESET" ]] && return 0
-    echo ""
-    echo "Which Illustrator era are you coming from?"
-    echo "  [1] CC — current Creative Cloud (default)"
-    echo "  [2] CS6 — last perpetual license"
-    printf "Choice [1]: "
-    if [[ $AUTO_YES == 1 ]]; then
-        echo "1 (auto)"
-        PRESET="cc"
-        return 0
-    fi
-    read -r choice
-    case "${choice:-1}" in
-        2) PRESET="cs6" ;;
-        *) PRESET="cc"  ;;
-    esac
-    echo "→ Using preset: $PRESET"
-}
-
-# ── Merge preferences ────────────────────────────────────────────────────────
-merge_prefs() {
-    local prefs_file="$INKSCAPE_CONFIG/preferences.xml"
-    python3 "$SCRIPT_DIR/scripts/merge_prefs.py" \
-        --prefs "$prefs_file" \
-        --patch "$SCRIPT_DIR/config/preferences-patch.xml" \
-        --preset "$PRESET"
-}
-
-# ── Copy config files ────────────────────────────────────────────────────────
-copy_files() {
-    mkdir -p \
-        "$INKSCAPE_CONFIG/keys" \
-        "$INKSCAPE_CONFIG/palettes" \
-        "$INKSCAPE_CONFIG/templates" \
-        "$INKSCAPE_CONFIG/symbols" \
-        "$INKSCAPE_CONFIG/splashscreens"
-
-    cp "$SCRIPT_DIR/config/keys/illustrator-${PRESET}.xml" \
-       "$INKSCAPE_CONFIG/keys/"
-
-    cp "$SCRIPT_DIR/config/palettes/"*.gpl "$INKSCAPE_CONFIG/palettes/"
-    cp "$SCRIPT_DIR/config/templates/"*.svg "$INKSCAPE_CONFIG/templates/"
-    cp "$SCRIPT_DIR/config/symbols/"*.svg   "$INKSCAPE_CONFIG/symbols/"
-
-    echo "→ Config files copied"
-}
-
-# ── Install desktop launcher + icons (Linux native only) ─────────────────────
-install_desktop() {
-    [[ "$INKSCAPE_INSTALL_METHOD" != "native" ]] && return 0
-
-    local app_dir="$HOME/.local/share/applications"
-    local icon_src="$SCRIPT_DIR/assets/illuscape.svg"
-    local splash_src="$SCRIPT_DIR/assets/splash.svg"
-    local icon_sizes=(16 32 48 64 128 256 512)
-
-    mkdir -p "$app_dir"
-    cp "$SCRIPT_DIR/assets/org.inkscape.Inkscape.desktop" "$app_dir/"
-
-    # Rasterize icon at each size (prefer rsvg-convert, fall back to Inkscape)
-    for size in "${icon_sizes[@]}"; do
-        local icon_dir="$HOME/.local/share/icons/hicolor/${size}x${size}/apps"
-        mkdir -p "$icon_dir"
-        if command -v rsvg-convert &>/dev/null; then
-            rsvg-convert -w "$size" -h "$size" "$icon_src" \
-                -o "$icon_dir/illuscape.png" 2>/dev/null && continue
-        fi
-        if command -v inkscape &>/dev/null; then
-            # Inkscape 1.x uses --export-filename + --export-type (--export-png removed in 1.0)
-            inkscape --export-filename="$icon_dir/illuscape.png" \
-                --export-type=png \
-                --export-width="$size" --export-height="$size" \
-                "$icon_src" 2>/dev/null && continue
-        fi
-        echo "⚠ Could not rasterize icon at ${size}px (install rsvg-convert for icons)"
-    done
-
-    # Splash screen (600x400)
-    if command -v rsvg-convert &>/dev/null; then
-        rsvg-convert -w 600 -h 400 "$splash_src" \
-            -o "$INKSCAPE_CONFIG/splashscreens/illuscape-splash.png" 2>/dev/null || true
-    fi
-
-    update-desktop-database "$app_dir" 2>/dev/null || true
-    echo "→ Desktop launcher installed"
-}
-
-# ── Main ──────────────────────────────────────────────────────────────────────
-main() {
-    echo "╔══════════════════════════════╗"
-    echo "║       Illuscape Installer    ║"
-    echo "╚══════════════════════════════╝"
-    echo ""
-
-    check_deps
-    detect_config
-    backup_config
-    choose_preset
-    merge_prefs
-    copy_files
-    install_desktop
-
-    echo ""
-    echo "✓ Illuscape installed (preset: $PRESET)"
-    echo ""
-    echo "  Open Inkscape to start using your Illustrator-style workspace."
-    echo "  To uninstall: ./uninstall.sh"
-    echo ""
-}
-
-main
+exec python3 "$SCRIPT_DIR/install.py" "$@"
diff --git a/scripts/detect_platform.py b/scripts/detect_platform.py
new file mode 100644
index 0000000..345ceab
--- /dev/null
+++ b/scripts/detect_platform.py
@@ -0,0 +1,82 @@
+"""
+detect_platform.py — Inkscape config-path detection, cross-platform.
+
+Shared by install.py and uninstall.py.
+"""
+from __future__ import annotations
+
+import os
+import platform
+import subprocess
+from pathlib import Path
+
+
+def _cmd_contains(cmd: list[str], pattern: str) -> bool:
+    """Run *cmd*; return True if stdout contains *pattern*."""
+    try:
+        result = subprocess.run(
+            cmd, capture_output=True, text=True, timeout=5
+        )
+        return pattern in result.stdout
+    except (FileNotFoundError, subprocess.TimeoutExpired):
+        return False
+
+
+def detect_config() -> tuple[Path, str]:
+    """
+    Return (inkscape_config_path, install_method).
+
+    install_method is one of: "flatpak", "snap", "native", "store"
+    """
+    system = platform.system()
+    if system == "Windows":
+        return _detect_windows()
+    if system == "Darwin":
+        return _detect_macos()
+    return _detect_linux()
+
+
+def _detect_linux() -> tuple[Path, str]:
+    # Flatpak takes priority — most common modern Linux install
+    flatpak_config = Path.home() / ".var/app/org.inkscape.Inkscape/config/inkscape"
+    if flatpak_config.is_dir() or _cmd_contains(
+        ["flatpak", "list"], "org.inkscape.Inkscape"
+    ):
+        return flatpak_config, "flatpak"
+
+    # Snap
+    snap_config = Path.home() / "snap/inkscape/current/.config/inkscape"
+    if snap_config.is_dir() or _cmd_contains(["snap", "list"], "inkscape"):
+        return snap_config, "snap"
+
+    # Native / XDG
+    xdg = Path(os.environ.get("XDG_CONFIG_HOME", Path.home() / ".config")) / "inkscape"
+    return xdg, "native"
+
+
+def _detect_macos() -> tuple[Path, str]:
+    # App Bundle (DMG install) stores config under ~/Library/Application Support
+    app_support = (
+        Path.home()
+        / "Library/Application Support/org.inkscape.Inkscape/config/inkscape"
+    )
+    if app_support.is_dir():
+        return app_support, "native"
+    # Homebrew / XDG fallback
+    xdg = Path(os.environ.get("XDG_CONFIG_HOME", Path.home() / ".config")) / "inkscape"
+    return xdg, "native"
+
+
+def _detect_windows() -> tuple[Path, str]:
+    # MS Store — glob for the Packages directory
+    local_appdata = os.environ.get("LOCALAPPDATA", "")
+    if local_appdata:
+        packages = Path(local_appdata) / "Packages"
+        if packages.is_dir():
+            matches = list(packages.glob("org.inkscape.Inkscape*"))
+            if matches:
+                return matches[0] / "LocalCache/Roaming/inkscape", "store"
+
+    # Native (winget / Scoop / chocolatey / official installer)
+    appdata = Path(os.environ.get("APPDATA", Path.home() / "AppData/Roaming"))
+    return appdata / "inkscape", "native"
diff --git a/scripts/detect_platform.sh b/scripts/detect_platform.sh
index fc26622..5d2f0df 100755
--- a/scripts/detect_platform.sh
+++ b/scripts/detect_platform.sh
@@ -9,23 +9,23 @@ _detect_inkscape_config() {
     # Flatpak takes priority — most common modern Linux install
     local flatpak_config="$HOME/.var/app/org.inkscape.Inkscape/config/inkscape"
     if [[ -d "$flatpak_config" ]] || flatpak list 2>/dev/null | grep -q "org.inkscape.Inkscape"; then
-        INKSCAPE_CONFIG="$flatpak_config"
-        INKSCAPE_INSTALL_METHOD="flatpak"
+        export INKSCAPE_CONFIG="$flatpak_config"
+        export INKSCAPE_INSTALL_METHOD="flatpak"
         return 0
     fi
 
     # Snap
     local snap_config="$HOME/snap/inkscape/current/.config/inkscape"
     if [[ -d "$snap_config" ]] || snap list 2>/dev/null | grep -q "^inkscape "; then
-        INKSCAPE_CONFIG="$snap_config"
-        INKSCAPE_INSTALL_METHOD="snap"
+        export INKSCAPE_CONFIG="$snap_config"
+        export INKSCAPE_INSTALL_METHOD="snap"
         return 0
     fi
 
     # Native / XDG
     local xdg_config="${XDG_CONFIG_HOME:-$HOME/.config}/inkscape"
-    INKSCAPE_CONFIG="$xdg_config"
-    INKSCAPE_INSTALL_METHOD="native"
+    export INKSCAPE_CONFIG="$xdg_config"
+    export INKSCAPE_INSTALL_METHOD="native"
     return 0
 }
 
diff --git a/tests/test_install.py b/tests/test_install.py
new file mode 100644
index 0000000..0f6a296
--- /dev/null
+++ b/tests/test_install.py
@@ -0,0 +1,222 @@
+"""
+Integration tests for install.py and uninstall.py — cross-platform.
+Replaces tests/test_install.bats.
+
+Each test runs inside a fully isolated tmp_path with a fake inkscape binary
+injected via PATH and an overridden config home pointing to tmp_path.
+"""
+from __future__ import annotations
+
+import os
+import platform
+import subprocess
+import sys
+from pathlib import Path
+
+import pytest
+
+REPO = Path(__file__).parent.parent
+INSTALL_PY = REPO / "install.py"
+UNINSTALL_PY = REPO / "uninstall.py"
+
+_FAKE_INKSCAPE_SH = """\
+#!/usr/bin/env sh
+case "$1" in
+  --version) echo 'Inkscape 1.3.2 (1:1.3.2+202311252150+091e20ef0f)' ;;
+esac
+"""
+
+_FAKE_INKSCAPE_BAT = """\
+@echo off
+if "%1"=="--version" echo Inkscape 1.3.2 (1:1.3.2+202311252150+091e20ef0f)
+"""
+
+
+def _make_fake_inkscape(bin_dir: Path) -> None:
+    """Create a platform-appropriate fake inkscape binary in *bin_dir*."""
+    if platform.system() == "Windows":
+        bat = bin_dir / "inkscape.bat"
+        bat.write_text(_FAKE_INKSCAPE_BAT)
+    else:
+        script = bin_dir / "inkscape"
+        script.write_text(_FAKE_INKSCAPE_SH)
+        script.chmod(0o755)
+
+
+def _config_dir(tmp_path: Path) -> Path:
+    """
+    Return the expected config path matching detect_config() for this platform
+    when the env fixture overrides the config home to *tmp_path*.
+    """
+    if platform.system() == "Windows":
+        # install.py on Windows: APPDATA/inkscape
+        return tmp_path / "config" / "inkscape"
+    else:
+        # install.py on Linux/macOS: XDG_CONFIG_HOME/inkscape
+        return tmp_path / "config" / "inkscape"
+
+
+@pytest.fixture()
+def env(tmp_path: Path):
+    """
+    Isolated subprocess environment with a fake inkscape and a temp config dir.
+    On Linux/macOS: overrides HOME and XDG_CONFIG_HOME.
+    On Windows:     overrides APPDATA and LOCALAPPDATA.
+    """
+    bin_dir = tmp_path / "bin"
+    bin_dir.mkdir()
+    _make_fake_inkscape(bin_dir)
+
+    cfg_dir = _config_dir(tmp_path)
+    cfg_dir.mkdir(parents=True, exist_ok=True)
+
+    base_env = os.environ.copy()
+    base_env["PATH"] = str(bin_dir) + os.pathsep + base_env.get("PATH", "")
+    # Block flatpak / snap detection inside subprocesses
+    base_env.pop("FLATPAK_ID", None)
+
+    if platform.system() == "Windows":
+        base_env["APPDATA"] = str(tmp_path / "config")
+        base_env["LOCALAPPDATA"] = str(tmp_path / "local")
+    else:
+        base_env["XDG_CONFIG_HOME"] = str(tmp_path / "config")
+        base_env["HOME"] = str(tmp_path)
+
+    return {
+        "tmp_path": tmp_path,
+        "config_dir": cfg_dir,
+        "env": base_env,
+    }
+
+
+def _run_install(env_fixture: dict, preset: str = "cc") -> subprocess.CompletedProcess[str]:
+    return subprocess.run(
+        [sys.executable, str(INSTALL_PY), "--yes", f"--preset={preset}"],
+        env=env_fixture["env"],
+        cwd=str(REPO),
+        capture_output=True,
+        text=True,
+    )
+
+
+def _run_uninstall(env_fixture: dict) -> subprocess.CompletedProcess[str]:
+    return subprocess.run(
+        [sys.executable, str(UNINSTALL_PY)],
+        env=env_fixture["env"],
+        cwd=str(REPO),
+        capture_output=True,
+        text=True,
+    )
+
+
+# ── install tests ─────────────────────────────────────────────────────────────
+
+def test_install_creates_backup(env):
+    result = _run_install(env)
+    assert result.returncode == 0, result.stderr
+    backups = list(env["tmp_path"].glob("config/inkscape.bak-illuscape-*"))
+    assert backups, "No backup directory created"
+
+
+def test_install_backup_is_idempotent(env):
+    _run_install(env)
+    first_backups = sorted(env["tmp_path"].glob("config/inkscape.bak-illuscape-*"))
+    _run_install(env)
+    second_backups = sorted(env["tmp_path"].glob("config/inkscape.bak-illuscape-*"))
+    assert first_backups == second_backups, "Second install created an extra backup"
+
+
+def test_install_cc_key_file(env):
+    result = _run_install(env, preset="cc")
+    assert result.returncode == 0, result.stderr
+    assert (env["config_dir"] / "keys/illustrator-cc.xml").exists()
+
+
+def test_install_cs6_key_file(env):
+    result = _run_install(env, preset="cs6")
+    assert result.returncode == 0, result.stderr
+    assert (env["config_dir"] / "keys/illustrator-cs6.xml").exists()
+
+
+def test_install_palettes(env):
+    result = _run_install(env)
+    assert result.returncode == 0, result.stderr
+    for name in (
+        "Illustrator-Defaults.gpl",
+        "Illustrator-Grays.gpl",
+        "Illustrator-Earth.gpl",
+    ):
+        assert (env["config_dir"] / "palettes" / name).exists(), f"Missing palette: {name}"
+
+
+def test_install_templates(env):
+    result = _run_install(env)
+    assert result.returncode == 0, result.stderr
+    for name in (
+        "Letter.svg",
+        "A4.svg",
+        "Web-1920x1080.svg",
+        "Web-1280x720.svg",
+        "Print-CMYK-Letter.svg",
+        "Print-CMYK-A4.svg",
+    ):
+        assert (env["config_dir"] / "templates" / name).exists(), f"Missing template: {name}"
+
+
+def test_install_creates_prefs(env):
+    result = _run_install(env)
+    assert result.returncode == 0, result.stderr
+    assert (env["config_dir"] / "preferences.xml").exists()
+
+
+def test_install_prefs_contains_units(env):
+    result = _run_install(env)
+    assert result.returncode == 0, result.stderr
+    content = (env["config_dir"] / "preferences.xml").read_text()
+    assert "px" in content or "pt" in content, "No unit setting found in preferences.xml"
+
+
+def test_install_noninteractive(env):
+    """--yes + --preset should exit 0 without any stdin."""
+    result = _run_install(env)
+    assert result.returncode == 0, f"Non-interactive install failed:\n{result.stderr}"
+
+
+# ── uninstall tests ───────────────────────────────────────────────────────────
+
+def test_uninstall_restores_prefs(env):
+    """Original prefs.xml is restored after install + uninstall."""
+    original_xml = '<inkscape version="1.0" />'
+    (env["config_dir"] / "preferences.xml").write_text(original_xml)
+
+    _run_install(env)
+    # prefs should now contain the patched version
+    result = _run_uninstall(env)
+    assert result.returncode == 0, result.stderr
+
+    restored = (env["config_dir"] / "preferences.xml").read_text()
+    assert restored == original_xml, "prefs.xml was not restored to the original content"
+
+
+def test_uninstall_removes_palettes(env):
+    _run_install(env)
+    result = _run_uninstall(env)
+    assert result.returncode == 0, result.stderr
+    for name in (
+        "Illustrator-Defaults.gpl",
+        "Illustrator-Grays.gpl",
+        "Illustrator-Earth.gpl",
+    ):
+        assert not (
+            env["config_dir"] / "palettes" / name
+        ).exists(), f"Palette was not removed: {name}"
+
+
+def test_uninstall_removes_templates(env):
+    _run_install(env)
+    result = _run_uninstall(env)
+    assert result.returncode == 0, result.stderr
+    for name in ("Letter.svg", "A4.svg"):
+        assert not (
+            env["config_dir"] / "templates" / name
+        ).exists(), f"Template was not removed: {name}"
diff --git a/uninstall.py b/uninstall.py
new file mode 100644
index 0000000..e81bd8b
--- /dev/null
+++ b/uninstall.py
@@ -0,0 +1,151 @@
+#!/usr/bin/env python3
+"""
+Illuscape uninstaller — cross-platform (Linux, Windows, macOS).
+
+Usage:
+    python3 uninstall.py
+    ./uninstall.sh          (Linux / macOS)
+"""
+from __future__ import annotations
+
+import os
+import platform
+import shutil
+import subprocess
+import sys
+from pathlib import Path
+
+SCRIPT_DIR = Path(__file__).parent
+sys.path.insert(0, str(SCRIPT_DIR / "scripts"))
+
+from detect_platform import detect_config  # noqa: E402
+
+ICON_SIZES = (16, 32, 48, 64, 128, 256, 512)
+
+# All files installed by install.py, keyed by subdirectory
+_INSTALLED_FILES: dict[str, list[str]] = {
+    "keys": [
+        "illustrator-cc.xml",
+        "illustrator-cs6.xml",
+    ],
+    "palettes": [
+        "Illustrator-Defaults.gpl",
+        "Illustrator-Grays.gpl",
+        "Illustrator-Earth.gpl",
+    ],
+    "templates": [
+        "Letter.svg",
+        "A4.svg",
+        "Web-1920x1080.svg",
+        "Web-1280x720.svg",
+        "Print-CMYK-Letter.svg",
+        "Print-CMYK-A4.svg",
+    ],
+    "symbols": [
+        "illuscape-common.svg",
+    ],
+    "splashscreens": [
+        "illuscape-splash.png",
+    ],
+}
+
+
+# ── Backup discovery ──────────────────────────────────────────────────────────
+
+def find_backup(config_path: Path) -> Path | None:
+    """Return the most recent illuscape backup directory, or None."""
+    backups = sorted(config_path.parent.glob(config_path.name + ".bak-illuscape-*"))
+    return backups[-1] if backups else None
+
+
+# ── Restore ───────────────────────────────────────────────────────────────────
+
+def restore_prefs(backup: Path, config_path: Path) -> None:
+    """Copy preferences.xml back from the backup directory."""
+    src = backup / "preferences.xml"
+    dst = config_path / "preferences.xml"
+    if src.exists():
+        shutil.copy2(src, dst)
+        print(f"→ preferences.xml restored from: {backup}")
+    else:
+        print("⚠ No preferences.xml in backup — skipping restore")
+
+
+# ── File removal ──────────────────────────────────────────────────────────────
+
+def remove_files(config_path: Path) -> None:
+    """Delete all files that install.py placed in the Inkscape config dir."""
+    for subdir, names in _INSTALLED_FILES.items():
+        for name in names:
+            (config_path / subdir / name).unlink(missing_ok=True)
+    (config_path / "illuscape.ico").unlink(missing_ok=True)
+    print("→ Illuscape config files removed")
+
+
+# ── Desktop cleanup ───────────────────────────────────────────────────────────
+
+def remove_desktop(install_method: str) -> None:
+    """Remove the desktop launcher / Start Menu shortcut for the current platform."""
+    system = platform.system()
+    if system == "Linux" and install_method == "native":
+        _remove_linux_desktop()
+    elif system == "Windows":
+        _remove_windows_desktop()
+
+
+def _remove_linux_desktop() -> None:
+    lnk = Path.home() / ".local/share/applications/org.inkscape.Inkscape.desktop"
+    lnk.unlink(missing_ok=True)
+    for size in ICON_SIZES:
+        icon = (
+            Path.home()
+            / f".local/share/icons/hicolor/{size}x{size}/apps/illuscape.png"
+        )
+        icon.unlink(missing_ok=True)
+    app_dir = Path.home() / ".local/share/applications"
+    subprocess.run(["update-desktop-database", str(app_dir)], capture_output=True)
+    print("→ Desktop launcher removed")
+
+
+def _remove_windows_desktop() -> None:
+    lnk = (
+        Path(os.environ.get("APPDATA", ""))
+        / "Microsoft/Windows/Start Menu/Programs/Illuscape.lnk"
+    )
+    lnk.unlink(missing_ok=True)
+    print("→ Start Menu shortcut removed")
+
+
+# ── Main ──────────────────────────────────────────────────────────────────────
+
+def main() -> None:
+    print("╔══════════════════════════════╗")
+    print("║      Illuscape Uninstaller   ║")
+    print("╚══════════════════════════════╝")
+    print()
+
+    config_path, install_method = detect_config()
+    print(f"→ Inkscape config: {config_path} ({install_method})")
+
+    backup = find_backup(config_path)
+    if backup is None:
+        print(f"⚠ No Illuscape backup found at {config_path}.bak-illuscape-*")
+        print("  Cannot restore original preferences.xml automatically.")
+        print("  Removing only Illuscape-installed files.")
+    else:
+        restore_prefs(backup, config_path)
+
+    remove_files(config_path)
+    remove_desktop(install_method)
+
+    print()
+    print("✓ Illuscape uninstalled.")
+    print()
+    print("  Note: Your Inkscape preferences may have changed since Illuscape was")
+    print("  installed. If anything looks wrong, review:")
+    print(f"  {config_path}/preferences.xml")
+    print()
+
+
+if __name__ == "__main__":
+    main()
diff --git a/uninstall.sh b/uninstall.sh
index 6716a48..f4de503 100755
--- a/uninstall.sh
+++ b/uninstall.sh
@@ -1,74 +1,6 @@
 #!/usr/bin/env bash
-# Illuscape uninstaller
+# Illuscape uninstaller — thin wrapper around uninstall.py
+# Usage: ./uninstall.sh
 set -euo pipefail
-
 SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
-
-source "$SCRIPT_DIR/scripts/detect_platform.sh"
-
-echo "╔══════════════════════════════╗"
-echo "║      Illuscape Uninstaller   ║"
-echo "╚══════════════════════════════╝"
-echo ""
-echo "→ Inkscape config: $INKSCAPE_CONFIG"
-
-# ── Find backup ───────────────────────────────────────────────────────────────
-BACKUP=$(ls -1d "${INKSCAPE_CONFIG}".bak-illuscape-* 2>/dev/null | sort | tail -1 || true)
-
-if [[ -z "$BACKUP" ]]; then
-    echo "⚠ No Illuscape backup found at ${INKSCAPE_CONFIG}.bak-illuscape-*"
-    echo "  Cannot restore original preferences.xml automatically."
-    echo "  Removing only Illuscape-installed files."
-else
-    echo "→ Restoring preferences.xml from: $BACKUP"
-    cp "$BACKUP/preferences.xml" "$INKSCAPE_CONFIG/preferences.xml" 2>/dev/null || true
-fi
-
-# ── Remove Illuscape-installed files ─────────────────────────────────────────
-remove_files() {
-    # Keys
-    rm -f "$INKSCAPE_CONFIG/keys/illustrator-cc.xml"
-    rm -f "$INKSCAPE_CONFIG/keys/illustrator-cs6.xml"
-
-    # Palettes
-    rm -f "$INKSCAPE_CONFIG/palettes/Illustrator-Defaults.gpl"
-    rm -f "$INKSCAPE_CONFIG/palettes/Illustrator-Grays.gpl"
-    rm -f "$INKSCAPE_CONFIG/palettes/Illustrator-Earth.gpl"
-
-    # Templates
-    rm -f "$INKSCAPE_CONFIG/templates/Letter.svg"
-    rm -f "$INKSCAPE_CONFIG/templates/A4.svg"
-    rm -f "$INKSCAPE_CONFIG/templates/Web-1920x1080.svg"
-    rm -f "$INKSCAPE_CONFIG/templates/Web-1280x720.svg"
-    rm -f "$INKSCAPE_CONFIG/templates/Print-CMYK-Letter.svg"
-    rm -f "$INKSCAPE_CONFIG/templates/Print-CMYK-A4.svg"
-
-    # Symbols
-    rm -f "$INKSCAPE_CONFIG/symbols/illuscape-common.svg"
-
-    # Splash
-    rm -f "$INKSCAPE_CONFIG/splashscreens/illuscape-splash.png"
-
-    echo "→ Illuscape config files removed"
-}
-
-remove_desktop() {
-    [[ "$INKSCAPE_INSTALL_METHOD" != "native" ]] && return 0
-    rm -f "$HOME/.local/share/applications/org.inkscape.Inkscape.desktop"
-    for size in 16 32 48 64 128 256 512; do
-        rm -f "$HOME/.local/share/icons/hicolor/${size}x${size}/apps/illuscape.png"
-    done
-    update-desktop-database "$HOME/.local/share/applications" 2>/dev/null || true
-    echo "→ Desktop launcher removed"
-}
-
-remove_files
-remove_desktop
-
-echo ""
-echo "✓ Illuscape uninstalled."
-echo ""
-echo "  Note: Your Inkscape preferences may have changed since Illuscape was"
-echo "  installed. If anything looks wrong, review:"
-echo "  $INKSCAPE_CONFIG/preferences.xml"
-echo ""
+exec python3 "$SCRIPT_DIR/uninstall.py"