diff --git a/README.md b/README.md
index 079a5cd..8fcb0b2 100644
--- a/README.md
+++ b/README.md
@@ -37,6 +37,9 @@ python generate_sprite.py "Rosas Landscaping" logos/rosas.png --type grass --rer
 
 # Both libraries side by side
 python generate_sprite.py "Rosas Landscaping" logos/rosas.png --type grass --compare
+
+# No logo file: find the logo on the business's website
+python generate_sprite.py "Rosas Landscaping" --domain rosaslandscaping.com --type grass
 ```
 
 Each run writes `sprites/<slug>.png`, `sprites/<slug>@4x.png` and `sprites/<slug>.json` (library, type, parts, colors). With `--reroll N`, the file names end in `-rN`. With `--compare`, each library writes `<slug>-<library>.*` and `<slug>-compare.png` shows them next to each other at the same height. Both use the same type and colors.
@@ -51,12 +54,14 @@ Each run writes `sprites/<slug>.png`, `sprites/<slug>@4x.png` and `sprites/<slug
 | `--compare` | Render with both libraries and write a comparison sheet |
 | `--out DIR` | Output folder (default `sprites`) |
 | `--scale N` | Size of the upscaled copy (default 4, `1` disables it) |
+| `--domain D` | Find the logo on this website when no logo file or `--colors` is given (see [Logo from a domain](#logo-from-a-domain)) |
+| `--logo-cache DIR` | Where logos found with `--domain` are cached (default `logos`) |
 
 Logo colors: transparent pixels, soft edge pixels and a solid white/black/gray background are ignored, and colored brand colors are used before white, black or gray. A logo with only white, black or gray in it still uses those colors.
 
 ## Batch
 
-Use a CSV with the columns `name,logo,type,description`. Only `name` is required, and rows with no `type` use the classifier.
+Use a CSV with the columns `name,logo,domain,type,description`. Only `name` is required. Rows with no `type` use the classifier, and rows with a `domain` but no `logo` look the logo up on that website.
 
 ```bash
 OPENROUTER_API_KEY=<API_KEY> python generate_sprite.py --batch businesses.csv --out sprites
@@ -64,6 +69,45 @@ OPENROUTER_API_KEY=<API_KEY> python generate_sprite.py --batch businesses.csv --
 
 Add `--compare` to get both libraries for every row.
 
+## Logo from a domain
+
+`logo_fetch.py` finds a business's logo from its website and caches it by domain.
+
+```bash
+python logo_fetch.py rosaslandscaping.com --out logos       # -> logos/rosaslandscaping.com.png (method)
+python logo_fetch.py rosaslandscaping.com --extra https://staging.example.net/   # also search this page
+```
+
+```python
+from logo_fetch import fetch_logo, fetch_logo_info, normalize_domain
+fetch_logo("rosaslandscaping.com", "logos")                 # Path or None
+fetch_logo_info("rosaslandscaping.com", "logos", extra_urls=["https://staging.example.net/"])  # (Path or None, method)
+normalize_domain("HTTPS://www.Rosas.com/about")              # "rosas.com"
+```
+
+Search order, best first. The first image with a brand hue wins; an image with only white/black/gray is kept as a fallback in case nothing colorful turns up (its method ends in `-mono`).
+
+| Method | Source |
+|---|---|
+| `site-logo` | The homepage (https, then http, without and with www): images with "logo" in class/id/file name/alt, images in a logo/brand container, the first image in `<header>`/`<nav>`, inline `<svg>` logos, JSON-LD `"logo"` |
+| `extra-logo` | The same on each `extra_urls` page (e.g. a staging copy of the site) |
+| `site-icon`, `extra-icon` | `apple-touch-icon`, large `<link rel=icon>`, `msapplication-TileImage` |
+| `google-favicon`, `ddg-favicon` | Google s2 favicons (sz=128), then DuckDuckGo ip3; their default globe icons (HTTP 404) are rejected |
+
+A homepage `og:image` is used (as a `site-logo` candidate) only when its URL says "logo"; otherwise it is nearly always a photo.
+
+Images named after something other than the domain (partner badges, "brands we carry") and images in partner/client/carousel sections rank lower, and only candidates close to the best one's score are tried. Theme stand-ins (`mock-logo`, `your-logo`, `my-company`, ...) are skipped. Parked/for-sale/expired domains and redirects to social or review sites are skipped. SVG is rasterized with `cairosvg` if it is installed, else the `rsvg-convert` binary if it is on PATH, else skipped. Blank, fully transparent or single-color images are rejected. Each download has a wall-clock cap and one search stops trying new candidates after 75 s, so a slow or stalled site can't hold up a batch. Logos are stored as PNG (at most 256 px) with a `<domain>.json` next to them holding the method; misses are cached too, so reruns make no requests (`--refresh` / `refresh=True` retries). `fetch_logo` is thread-safe, so callers can run many lookups in a thread pool.
+
+## Python API
+
+```python
+import generate_sprite as gs
+lib = gs.load_library("pixellab")
+info, sprite = gs.generate(lib, "Rosas Landscaping", None, "grass", logo="logos/rosas.png", write_files=False)
+```
+
+With `write_files=False`, `generate` returns the info dict (plan, parts, attributes, colors) and the PIL image without writing or printing anything. `logo` may be a path or a PIL image. The part registries find their art folders (`parts_pl/`, `parts/`) relative to the working directory, so run from this folder (or `os.chdir` to it) before importing.
+
 ## PixelLab library
 
 Each base creature has a spec in `pixellab_library/<body>.json`: the prompt and seed for its base image, plus one edit prompt per part ("add a pair of gold horns ..."). `pixellab_library.py` generates the base with PixelLab's pixen model and makes each part as an edit of that exact image. The part is the pixel difference between the edit and the base, so it lines up with the base and gets its attach point automatically. The full spec schema and conventions are in the docstring at the top of `pixellab_library.py`.
diff --git a/generate_sprite.py b/generate_sprite.py
index bfa3d9a..659c1c6 100644
--- a/generate_sprite.py
+++ b/generate_sprite.py
@@ -17,8 +17,9 @@ Usage
   python generate_sprite.py "Rosas Landscaping" logos/rosas.png            # Jev picks the type
   python generate_sprite.py "Rosas Landscaping" logos/rosas.png --type grass
   python generate_sprite.py "Rosas Landscaping" --type grass --colors "#2E7D32,#FBC02D"
+  python generate_sprite.py "Rosas Landscaping" --domain rosaslandscaping.com   # logo from the website
   python generate_sprite.py "Rosas Landscaping" logos/rosas.png --compare  # both libraries side by side
-  python generate_sprite.py --batch businesses.csv          # columns: name,logo,type,description
+  python generate_sprite.py --batch businesses.csv          # columns: name,logo,domain,type,description
   python generate_sprite.py --library classic --make-placeholders   # test art for every part
   python generate_sprite.py --sprite-list SPRITES.md        # art checklist + weight report
 
@@ -445,8 +446,9 @@ def _interior(arr, tol=24):
     return keep
 
 
-def extract_logo_colors(path, n=6):
-    """Return [(rgb, fraction)] of a logo's brand colours, most important first.
+def extract_logo_colors(logo, n=6):
+    """Return [(rgb, fraction)] of a logo's brand colours, most important first. `logo` is a
+    path or a PIL image.
 
     - Transparent pixels and anti-aliased edge blends are ignored.
     - A solid white/black/gray background (the colour filling most of the image border) is
@@ -456,7 +458,7 @@ def extract_logo_colors(path, n=6):
     - If nothing but the background is left (e.g. a plain logo on its own colour), the
       background colour is used rather than nothing.
     """
-    img = Image.open(path).convert("RGBA")
+    img = (logo.copy() if isinstance(logo, Image.Image) else Image.open(logo)).convert("RGBA")
     img.thumbnail((256, 256))
     arr = np.array(img)
     opaque = arr[:, :, 3] >= 200
@@ -545,9 +547,11 @@ def resolve_type(name, ptype=None, description=None):
 
 
 def generate(lib, name, out_dir, ptype, probs=None, logo=None, colors=None, reroll=0, scale=4,
-             parts_dir=None, suffix=""):
-    """Render one sprite with library `lib`; writes <slug><suffix>.png/.json (+ upscaled copy).
-    Returns (info, sprite)."""
+             parts_dir=None, suffix="", write_files=True):
+    """Render one sprite with library `lib`; writes <slug><suffix>.png/.json (+ upscaled copy)
+    into `out_dir` and prints a summary line. With write_files=False nothing is written or
+    printed (out_dir may be None): the caller gets the image and info. `logo` is a path or a
+    PIL image. Returns (info, sprite)."""
     rng = make_rng(name, reroll)
     plan, chosen, markings, tags = pick_parts(lib, ptype, rng)
 
@@ -564,13 +568,6 @@ def generate(lib, name, out_dir, ptype, probs=None, logo=None, colors=None, rero
 
     sprite = recolor(place_on_canvas(compose(parts_dir or lib.PARTS_DIR, chosen, markings, rng), lib), palette)
 
-    out_dir = Path(out_dir)
-    out_dir.mkdir(parents=True, exist_ok=True)
-    slug = slugify(name) + (f"-r{reroll}" if reroll else "") + suffix
-    sprite.save(out_dir / f"{slug}.png")
-    if scale > 1:
-        sprite.resize((sprite.width * scale, sprite.height * scale), Image.NEAREST).save(out_dir / f"{slug}@{scale}x.png")
-
     info = {
         "name": name, "library": lib.NAME, "type": ptype, "type_probabilities": probs, "plan": plan,
         "parts": {s: p["name"] for s, p in chosen.items()}, "markings": markings,
@@ -578,6 +575,16 @@ def generate(lib, name, out_dir, ptype, probs=None, logo=None, colors=None, rero
         "colors": {"main": rgb_to_hex(main), "accent": rgb_to_hex(accent),
                    "type": TYPE_COLORS[ptype], "outline": rgb_to_hex(palette["outline"])},
     }
+    if not write_files:
+        return info, sprite
+
+    out_dir = Path(out_dir)
+    out_dir.mkdir(parents=True, exist_ok=True)
+    slug = slugify(name) + (f"-r{reroll}" if reroll else "") + suffix
+    sprite.save(out_dir / f"{slug}.png")
+    if scale > 1:
+        sprite.resize((sprite.width * scale, sprite.height * scale), Image.NEAREST).save(out_dir / f"{slug}@{scale}x.png")
+
     (out_dir / f"{slug}.json").write_text(json.dumps(info, indent=2))
     print(f"{name} [{lib.NAME}]: {ptype.upper()} {plan} | {', '.join(info['attributes']) or 'no attributes'} | "
           f"main {info['colors']['main']} accent {info['colors']['accent']} -> {out_dir / slug}.png")
@@ -755,6 +762,17 @@ def write_sprite_list(lib, path):
 
 # ============================================================ CLI
 
+def logo_for_domain(a, domain):
+    """Logo found from the business's website (logo_fetch.py, cached in --logo-cache), or None."""
+    from logo_fetch import fetch_logo_info
+    path, method = fetch_logo_info(domain, a.logo_cache)
+    if path:
+        print(f"logo for {domain}: {path} ({method})")
+    else:
+        warn(f"no logo found for {domain}, using the type colors")
+    return path
+
+
 def run_one(a, name, ptype=None, description=None, logo=None, colors=None, reroll=0):
     """Render `name` with --library, or with every library plus a comparison sheet (--compare)."""
     ptype, probs = resolve_type(name, ptype, description)
@@ -783,7 +801,9 @@ def main():
     ap.add_argument("--parts", help="Parts folder (default: the library's own)")
     ap.add_argument("--out", default="sprites", help="Output folder")
     ap.add_argument("--scale", type=int, default=4, help="Also save an upscaled copy (1 to disable)")
-    ap.add_argument("--batch", help="CSV with columns name,logo,type,description (only name required)")
+    ap.add_argument("--domain", help="Business website: find its logo there when no logo file is given")
+    ap.add_argument("--logo-cache", default="logos", help="Folder for logos found with --domain (default logos/)")
+    ap.add_argument("--batch", help="CSV with columns name,logo,domain,type,description (only name required)")
     ap.add_argument("--make-placeholders", action="store_true", help="Create test art for every part")
     ap.add_argument("--overwrite", action="store_true", help="With --make-placeholders, replace existing files")
     ap.add_argument("--sprite-list", metavar="PATH", help="Write the art checklist and weight report")
@@ -802,12 +822,18 @@ def main():
             for row in csv.DictReader(f):
                 if not (row.get("name") or "").strip():
                     continue
+                logo = (row.get("logo") or "").strip() or None
+                domain = (row.get("domain") or "").strip()
+                if not logo and domain:
+                    logo = logo_for_domain(a, domain)
                 run_one(a, row["name"].strip(), (row.get("type") or "").strip() or None,
-                        (row.get("description") or "").strip() or None, (row.get("logo") or "").strip() or None)
+                        (row.get("description") or "").strip() or None, logo)
     elif a.name:
         logo = a.logo or a.logo_file
         if logo and not Path(logo).exists():
             sys.exit(f"Logo not found: {logo}")
+        if not logo and not colors and a.domain:
+            logo = logo_for_domain(a, a.domain)
         run_one(a, a.name, a.type, a.desc, logo, colors, a.reroll)
     elif not (a.make_placeholders or a.sprite_list):
         ap.print_help()
diff --git a/logo_fetch.py b/logo_fetch.py
new file mode 100755
index 0000000..bc700be
--- /dev/null
+++ b/logo_fetch.py
@@ -0,0 +1,678 @@
+#!/usr/bin/env python3
+"""
+Find a business's logo from its domain.
+
+    from logo_fetch import fetch_logo
+    path = fetch_logo("example.com", "logos/")          # Path to logos/example.com.png, or None
+
+Strategy, best source first. The first image with a brand hue in it wins; an image that is
+only white/black/gray is kept as a fallback in case nothing colourful turns up.
+
+  1. Logos on the homepage (https then http, without then with www): <img>/<svg>/<picture>
+     with "logo" in class/id/src/alt or inside a logo/brand container, the first image in
+     <header>/<nav>, JSON-LD "logo" and og:image URLs that say "logo". Images whose file
+     name/alt names something other than the domain, or that sit in partner/client/carousel
+     sections, rank lower; only candidates close to the best one's score are tried, so a
+     wall of client logos can't beat the site's own black-and-white logo.
+  2. The same logos on each page in `extra_urls` (e.g. a staging copy of the site).
+  3. Site icons from those pages: apple-touch-icon, large <link rel=icon>, msapplication-TileImage.
+  4. Favicon services: Google s2 (sz=128), then DuckDuckGo ip3. Their default globe icons
+     (served with HTTP 404) are rejected.
+  og:image is only used when its URL says "logo": otherwise it is nearly always a photo.
+
+Parked or for-sale domains and domains that redirect to social/review sites are skipped
+(their icons belong to someone else). SVG is rasterized with cairosvg if it is installed,
+else with the `rsvg-convert` binary if it is on PATH, else skipped. Images are stored as PNG
+(at most 256 px) in dest_dir/<domain>.png with dest_dir/<domain>.json holding the method that
+found it; a miss is cached too, so reruns make no requests (pass refresh=True to retry).
+
+CLI:  python logo_fetch.py example.com [--out logos] [--extra https://staging.example.net/] [--refresh]
+"""
+import argparse
+import base64
+import io
+import json
+import re
+import shutil
+import socket
+import subprocess
+import sys
+import threading
+import time
+from html.parser import HTMLParser
+from pathlib import Path
+from urllib.parse import unquote, urljoin, urlparse
+
+import numpy as np
+import requests
+from PIL import Image
+
+UA = ("Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) "
+      "Chrome/128.0.0.0 Safari/537.36")
+HEADERS = {"User-Agent": UA, "Accept-Language": "en-US,en;q=0.9",
+           "Accept": "text/html,application/xhtml+xml,application/xml;q=0.9,image/avif,image/webp,*/*;q=0.8"}
+TIMEOUT = (4, 8)                 # (connect, read) seconds per request
+DNS_SECONDS = 5
+DOWNLOAD_SECONDS = 12            # wall-clock cap for one download
+HOMEPAGE_SECONDS = 20            # stop trying more homepage variants after this
+SEARCH_SECONDS = 75              # stop trying more candidates after this (keeps what was found)
+MAX_PAGE_BYTES = 3_000_000
+MAX_IMAGE_BYTES = 6_000_000
+MAX_LOGO_TRIES = 6               # downloads per page and tier
+MAX_ICON_TRIES = 3
+CACHE_VERSION = 2
+STORE_SIZE = 256
+
+LOGO_SCORE = 50                  # candidates scoring at least this are "logos", below are "icons"
+
+# Third-party badges and widgets that often say "logo" but aren't the business's own.
+FOREIGN = re.compile(r"bbb|better.?business|google|facebook|instagram|twitter|linkedin|youtube|tiktok|"
+                     r"pinterest|yelp|angi|homeadvisor|thumbtack|houzz|nextdoor|porch|visa|mastercard|"
+                     r"amex|discover|paypal|venmo|badge|award|review|trustpilot|guild|certif|seal|"
+                     r"partner|payment|financ|wix|squarespace|godaddy|wordpress|elementor|gravatar|"
+                     r"emoji|spinner|loader|loading|placeholder|blank|pixel|spacer|arrow|close|menu", re.I)
+# Theme / template stand-ins that a site shows before it gets its real logo.
+PLACEHOLDER = re.compile(r"\bmock|placeholder|your.?logo|logo.?here|my.?company|sample.?logo|dummy|"
+                         r"default.?logo|logo.?default|lorem|demo.?logo|logoipsum|your.?company", re.I)
+PARKING_HOSTS = ("sedoparking.com", "parkingcrew.net", "bodis.com", "hugedomains.com", "dan.com",
+                 "afternic.com", "godaddy.com", "namecheap.com", "above.com", "undeveloped.com",
+                 "sedo.com", "domainmarket.com", "brandbucket.com", "squadhelp.com", "atom.com",
+                 "parklogic.com", "domainnamesales.com", "uniregistry.com", "porkbun.com",
+                 "expireddomains.com", "expireddomains.net")
+PLATFORM_HOSTS = ("facebook.com", "instagram.com", "yelp.com", "google.com", "goo.gl", "linktr.ee",
+                  "linkedin.com", "twitter.com", "x.com", "nextdoor.com", "angi.com", "thumbtack.com",
+                  "homeadvisor.com", "houzz.com", "bbb.org", "youtube.com", "tiktok.com")
+PARKED_TEXT = re.compile(r"domain (?:name )?(?:is|may be) for sale|buy this domain|this domain is parked|"
+                         r"parked free|domain parking|parkingcrew|sedoparking|is available for purchase|"
+                         r"the domain .{0,40} is for sale|future home of|website coming soon|expired domains?|"
+                         r"domain (?:has )?expired|this site can.t be reached|account suspended|404 not found", re.I)
+
+
+def normalize_domain(value):
+    """'HTTPS://www.Example.com/about' -> 'example.com'. None if it isn't a plausible domain."""
+    if not value:
+        return None
+    v = value.strip().lower()
+    v = re.sub(r"^[a-z][a-z0-9+.-]*://", "", v)
+    v = re.split(r"[/?#\s]", v, maxsplit=1)[0]
+    v = v.split("@")[-1].split(":")[0].strip(".")
+    if v.startswith("www."):
+        v = v[4:]
+    if "." not in v or not re.fullmatch(r"[a-z0-9.-]+", v) or ".." in v:
+        return None
+    if not re.search(r"\.[a-z]{2,}$", v):
+        return None
+    return v
+
+
+def _host(url):
+    h = (urlparse(url).hostname or "").lower()
+    return h[4:] if h.startswith("www.") else h
+
+
+def _host_in(url, hosts):
+    h = _host(url)
+    return any(h == d or h.endswith("." + d) for d in hosts)
+
+
+# ============================================================ page parsing
+
+class _Candidate:
+    __slots__ = ("url", "data", "score", "kind")
+
+    def __init__(self, url=None, data=None, score=0, kind="img"):
+        self.url, self.data, self.score, self.kind = url, data, score, kind
+
+
+def _srcset_best(srcset):
+    best, best_v = None, -1.0
+    for part in srcset.split(","):
+        bits = part.strip().split()
+        if not bits:
+            continue
+        v = 1.0
+        if len(bits) > 1:
+            m = re.match(r"([\d.]+)([wx])", bits[1])
+            if m:
+                v = float(m.group(1))
+        if v > best_v:
+            best, best_v = bits[0], v
+    return best
+
+
+def _is_hint(text):
+    return "logo" in text or bool(re.search(r"navbar-brand|site-brand|brand-logo|branding|site-title|brand\b", text))
+
+
+def _is_bad_container(text):
+    """Sections that show other companies' logos (partners, clients, brands carried)."""
+    return bool(re.search(r"partner|client|customer|sponsor|carousel|slider|swiper|marquee|logos|brands|"
+                          r"featured|testimonial|review|award|certif|affiliat|manufactur|as-seen", text))
+
+
+GENERIC_WORDS = set("""logo logos image images icon icons favicon header footer site main white black dark
+light color colour colors final retina mobile small large transparent horizontal vertical sticky scaled
+cropped copy untitled design designs default new web website primary secondary full alt nav navbar brand
+branding home top wordpress upload uploads content screenshot img png jpg jpeg svg webp gif edited
+version original mark text title company business group the and with removebg background bg trans
+frame artboard layer asset assets file photo picture custom resized min hires lores rgb cmyk vector
+square round circle wide long stacked inverse reverse reversed blue green red yellow orange purple
+gray grey""".split())
+
+
+def _words(*texts):
+    out = []
+    for t in texts:
+        t = re.sub(r"\.(png|jpe?g|svg|webp|gif|ico|avif)$", "", t)
+        t = re.sub(r"([a-z])([A-Z])", r"\1 \2", t)
+        out += [w for w in re.findall(r"[a-z]{4,}", t.lower()) if w not in GENERIC_WORDS]
+    return out
+
+
+def brand_label(domain):
+    """'shop.miriellopainting.co.uk' -> 'miriellopainting': the name part of a domain."""
+    if not domain:
+        return None
+    parts = domain.split(".")
+    if len(parts) >= 3 and len(parts[-1]) == 2 and parts[-2] in ("co", "com", "org", "net", "ac", "gov"):
+        parts = parts[:-2]
+    else:
+        parts = parts[:-1]
+    return parts[-1] if parts else None
+
+
+def relevance(words, brand):
+    """+1 if the words name the brand, -1 if they name something else, 0 if they say nothing."""
+    if not words or not brand:
+        return 0
+    return 1 if any(w in brand or brand in w for w in words) else -1
+
+
+class _PageParser(HTMLParser):
+    CONTAINERS = {"header", "nav", "a", "div", "span", "figure", "picture", "footer", "section", "li",
+                  "p", "h1", "h2", "button", "main", "aside", "ul"}
+
+    def __init__(self, base_url, html, brand=None):
+        super().__init__(convert_charrefs=True)
+        self.base = base_url
+        self.html = html
+        self.brand = brand
+        self.line_starts = [0] + [m.end() for m in re.finditer("\n", html)]
+        self.stack = []                       # (tag, logo_hint, bad_container)
+        self.cands = []
+        self.header_imgs = 0
+        self.svg_start = None
+        self.svg_depth = 0
+        self.svg_score = 0
+
+    def _offset(self):
+        line, col = self.getpos()
+        return self.line_starts[line - 1] + col
+
+    def _ctx(self):
+        tags = {t for t, _, _ in self.stack}
+        return (any(h for _, h, _ in self.stack), bool(tags & {"header", "nav"}), "footer" in tags,
+                any(b for _, _, b in self.stack))
+
+    def _add(self, url, score, kind="img"):
+        if not url:
+            return
+        url = url.strip()
+        if url.startswith("data:"):
+            self.cands.append(_Candidate(data=url, score=score, kind=kind))
+        elif not url.startswith(("javascript:", "#", "about:")):
+            self.cands.append(_Candidate(url=urljoin(self.base, url), score=score, kind=kind))
+
+    def _adjust(self, score, words, in_header, in_footer, in_bad):
+        rel = relevance(words, self.brand)
+        score += 30 * rel if rel > 0 else 40 * rel
+        if in_header:
+            score += 15
+        if in_footer:
+            score -= 15
+        if in_bad:
+            score -= 40
+        return score
+
+    def handle_starttag(self, tag, attrs):
+        a = {k: (v or "") for k, v in attrs}
+        ident = f"{a.get('class', '')} {a.get('id', '')}".lower()
+        if tag in ("img", "source"):
+            self._img(tag, a, ident)
+        elif tag == "svg":
+            if self.svg_start is None:
+                in_hint, in_header, in_footer, in_bad = self._ctx()
+                if _is_hint(ident) or in_hint:
+                    self.svg_start = self._offset()
+                    self.svg_depth = 0
+                    self.svg_score = self._adjust(80, _words(a.get("aria-label", ""), a.get("title", "")),
+                                                  in_header, in_footer, in_bad)
+            if self.svg_start is not None:
+                self.svg_depth += 1
+        elif tag == "link":
+            self._link(a)
+        elif tag == "meta":
+            prop = (a.get("property") or a.get("name") or "").lower()
+            content = a.get("content", "")
+            if prop in ("og:image", "og:image:url", "twitter:image") and "logo" in content.lower():
+                self._add(content, 55, "og")
+            elif prop == "msapplication-tileimage" and content:
+                self._add(content, 20, "icon")
+        if tag in self.CONTAINERS:
+            self.stack.append((tag, _is_hint(ident), _is_bad_container(ident)))
+
+    def handle_startendtag(self, tag, attrs):
+        self.handle_starttag(tag, attrs)
+        if tag in self.CONTAINERS and self.stack and self.stack[-1][0] == tag:
+            self.stack.pop()
+
+    def handle_endtag(self, tag):
+        if tag == "svg" and self.svg_start is not None:
+            self.svg_depth -= 1
+            if self.svg_depth <= 0:
+                end = self.html.find(">", self._offset()) + 1
+                raw = self.html[self.svg_start:end]
+                if "<use" not in raw and len(raw) < 400_000:
+                    if "xmlns=" not in raw[:300]:
+                        raw = raw.replace("<svg", '<svg xmlns="http://www.w3.org/2000/svg"', 1)
+                    self.cands.append(_Candidate(data="svg:" + raw, score=self.svg_score, kind="svg"))
+                self.svg_start = None
+            return
+        if tag not in self.CONTAINERS:
+            return
+        for i in range(len(self.stack) - 1, -1, -1):
+            if self.stack[i][0] == tag:
+                del self.stack[i:]
+                return
+
+    def _img(self, tag, a, ident):
+        src = (a.get("data-src") or a.get("data-lazy-src") or a.get("data-original") or "")
+        srcset = a.get("data-srcset") or a.get("data-lazy-srcset") or a.get("srcset") or ""
+        plain = a.get("src", "")
+        if not src:
+            src = plain if plain and not (plain.startswith("data:") and len(plain) < 300) else ""
+        if srcset:
+            best = _srcset_best(srcset)
+            if best and not best.startswith("data:"):
+                src = best
+        if not src:
+            return
+        try:
+            if 0 < int(a.get("width", "0") or 0) <= 10 and 0 < int(a.get("height", "0") or 0) <= 10:
+                return
+        except ValueError:
+            pass
+        fname = unquote(urlparse(src).path.rsplit("/", 1)[-1]) if not src.startswith("data:") else ""
+        alt = a.get("alt", "")
+        low = f"{fname} {alt}".lower()
+        in_hint, in_header, in_footer, in_bad = self._ctx()
+        score = 0
+        if "custom-logo" in ident:
+            score = 110
+        elif "logo" in ident:
+            score = 100
+        elif "logo" in fname.lower():
+            score = 90
+        elif in_hint:
+            score = 85
+        elif "logo" in alt.lower():
+            score = 70
+        elif "brand" in ident:
+            score = 60
+        elif in_header and self.header_imgs == 0:
+            score = 52
+        if in_header:
+            self.header_imgs += 1
+        if not score or tag == "source" and not in_hint:
+            return
+        words = _words(fname, alt, a.get("title", ""))
+        if PLACEHOLDER.search(low) or relevance(words, self.brand) <= 0 and FOREIGN.search(low):
+            return
+        self._add(src, self._adjust(score, words, in_header, in_footer, in_bad))
+
+    def _link(self, a):
+        rel = a.get("rel", "").lower()
+        href = a.get("href", "")
+        if not href or "icon" not in rel or "mask-icon" in rel or PLACEHOLDER.search(href.rsplit("/", 1)[-1]):
+            return
+        size = 0
+        m = re.match(r"(\d+)x(\d+)", a.get("sizes", ""))
+        if m:
+            size = int(m.group(1))
+        if "apple-touch-icon" in rel:
+            score = 35
+        elif size >= 96 or href.lower().endswith(".svg"):
+            score = 30
+        else:
+            score = 10 + min(size, 64) // 8
+        self._add(href, score, "icon")
+
+
+JSONLD_LOGO = re.compile(r'"logo"\s*:\s*(?:\{[^{}]*?"(?:url|contentUrl)"\s*:\s*)?"(https?:[^"]+)"')
+
+
+def parse_page(base_url, html, brand=None):
+    """Logo candidates on a page, best first: [_Candidate]. Each URL appears once. `brand` is
+    the domain's name part (brand_label): images named after something else rank lower."""
+    p = _PageParser(base_url, html, brand)
+    try:
+        p.feed(html)
+        p.close()
+    except Exception:            # malformed markup: keep what was found so far
+        pass
+    cands = p.cands
+    for m in JSONLD_LOGO.finditer(html):
+        url = m.group(1).replace("\\/", "/")
+        words = _words(unquote(url.rsplit("/", 1)[-1]))
+        if relevance(words, brand) > 0 or not FOREIGN.search(url.rsplit("/", 1)[-1]):
+            cands.append(_Candidate(url=url, score=75 + (30 * relevance(words, brand) if words else 0)))
+    seen, out = set(), []
+    for c in sorted(cands, key=lambda c: -c.score):
+        key = c.url or c.data
+        if key not in seen:
+            seen.add(key)
+            out.append(c)
+    return out
+
+
+# ============================================================ network + images
+
+def _get(session, url, limit, accept=None, deadline=DOWNLOAD_SECONDS):
+    """GET with a size cap and a wall-clock deadline (a server trickling bytes can't stall
+    the search). Returns (response, body bytes) or (None, None). A body cut off by the
+    deadline is returned as is (fine for HTML; a cut-off image fails to decode)."""
+    start = time.monotonic()
+    try:
+        r = session.get(url, timeout=TIMEOUT, stream=True, allow_redirects=True,
+                        headers={"Accept": accept} if accept else None)
+    except (requests.RequestException, ValueError):
+        return None, None
+    try:
+        body = bytearray()
+        for chunk in r.iter_content(65536):
+            body += chunk
+            if len(body) > limit or time.monotonic() - start > deadline:
+                break
+        return r, bytes(body)
+    except (requests.RequestException, ValueError):
+        return None, None
+    finally:
+        r.close()
+
+
+def _resolves(host):
+    """True if the host resolves within DNS_SECONDS. getaddrinfo has no timeout of its own
+    (requests would hang on a stuck lookup too), so it runs in a daemon thread that is
+    abandoned if it takes too long."""
+    done = threading.Event()
+    ok = []
+
+    def lookup():
+        try:
+            socket.getaddrinfo(host, 443, proto=socket.IPPROTO_TCP)
+            ok.append(True)
+        except (OSError, UnicodeError):
+            pass
+        done.set()
+
+    threading.Thread(target=lookup, daemon=True).start()
+    return done.wait(DNS_SECONDS) and bool(ok)
+
+
+def fetch_homepage(session, domain):
+    """(final_url, html) for the first of https/http x bare/www that answers with HTML. Hosts
+    that don't resolve are skipped, and the attempts stop after HOMEPAGE_SECONDS."""
+    start = time.monotonic()
+    hosts = [h for h in (domain, f"www.{domain}") if _resolves(h)]
+    for url in [f"{scheme}://{h}/" for scheme in ("https", "http") for h in hosts]:
+        if time.monotonic() - start > HOMEPAGE_SECONDS:
+            break
+        r, body = _get(session, url, MAX_PAGE_BYTES)
+        if r is None:
+            continue
+        if r.status_code >= 400 or "html" not in r.headers.get("content-type", "html").lower():
+            if r.status_code in (403, 404, 410, 500, 502, 503):
+                continue
+            return None, None
+        return r.url, body.decode(r.encoding or "utf-8", errors="replace")
+    return None, None
+
+
+def is_parked(final_url, html, domain=None):
+    """True if the page is a parked / for-sale / placeholder page or a social-site redirect."""
+    if _host_in(final_url, PARKING_HOSTS + PLATFORM_HOSTS) and not (domain and _host_in(final_url, (domain,))):
+        return True
+    text = re.sub(r"<script.*?</script>|<style.*?</style>", " ", html[:400_000], flags=re.S | re.I)
+    text = re.sub(r"<[^>]+>", " ", text)
+    return len(text.split()) < 400 and bool(PARKED_TEXT.search(text))
+
+
+def _rasterize_svg(data):
+    try:
+        import cairosvg
+        return cairosvg.svg2png(bytestring=data, output_width=STORE_SIZE)
+    except ImportError:
+        pass
+    except Exception:
+        return None
+    exe = shutil.which("rsvg-convert")
+    if not exe:
+        return None
+    try:
+        out = subprocess.run([exe, "-w", str(STORE_SIZE), "--keep-aspect-ratio", "-f", "png"],
+                             input=data, capture_output=True, timeout=15)
+    except (OSError, subprocess.SubprocessError):
+        return None
+    return out.stdout if out.returncode == 0 and out.stdout else None
+
+
+def _decode_data_uri(uri):
+    if uri.startswith("svg:"):
+        return uri[4:].encode("utf-8")
+    head, _, payload = uri.partition(",")
+    try:
+        return base64.b64decode(payload) if ";base64" in head else unquote(payload).encode("utf-8")
+    except (ValueError, TypeError):
+        return None
+
+
+def _looks_svg(data, ctype=""):
+    head = data[:512].lstrip().lower()
+    return "svg" in ctype or head.startswith(b"<svg") or (head.startswith(b"<?xml") and b"<svg" in data[:4096])
+
+
+def load_image(data, ctype=""):
+    """Bytes -> RGBA PIL image (largest frame/size), or None if it can't be read."""
+    if not data:
+        return None
+    if _looks_svg(data, ctype):
+        data = _rasterize_svg(data)
+        if not data:
+            return None
+    try:
+        img = Image.open(io.BytesIO(data))
+        img.seek(0)
+        img.load()
+        img = img.convert("RGBA")
+    except Exception:
+        return None
+    if max(img.size) < 16:
+        return None
+    img.thumbnail((STORE_SIZE, STORE_SIZE), Image.LANCZOS)
+    return img
+
+
+def judge(img):
+    """'hued' if the image has a brand colour, 'neutral' if only white/black/gray, None if it has
+    no usable colour (blank, transparent, a single flat block)."""
+    from generate_sprite import extract_logo_colors, is_neutral   # lazily: keeps import light
+    arr = np.array(img)
+    opaque = arr[:, :, 3] >= 200
+    if opaque.sum() < 50 or opaque.mean() < 0.02:
+        return None
+    px = arr[opaque][:, :3].astype(float)
+    if px.std(axis=0).max() < 3 and opaque.all():
+        return None                   # one flat colour filling the whole canvas
+    colors = extract_logo_colors(img)
+    if not colors:
+        return None
+    return "neutral" if all(is_neutral(c) for c, _ in colors) else "hued"
+
+
+# ============================================================ fetch
+
+class _Search:
+    def __init__(self, session):
+        self.session = session
+        self.fallback = None          # (img, method): first neutral-only image
+        self.tried = set()
+        self.start = time.monotonic()
+
+    def try_candidate(self, c, method):
+        """Returns (img, method) if c is a usable hued image; remembers neutral ones."""
+        key = c.url or c.data
+        if key in self.tried or time.monotonic() - self.start > SEARCH_SECONDS:
+            return None
+        self.tried.add(key)
+        if c.data:
+            data, ctype = _decode_data_uri(c.data), ""
+        else:
+            r, data = _get(self.session, c.url, MAX_IMAGE_BYTES, accept="image/avif,image/webp,image/*,*/*;q=0.8")
+            if r is None or r.status_code != 200 or len(data or b"") > MAX_IMAGE_BYTES:
+                return None
+            ctype = r.headers.get("content-type", "").lower()
+            if "html" in ctype:
+                return None
+        img = load_image(data, ctype)
+        if img is None:
+            return None
+        verdict = judge(img)
+        if verdict == "hued":
+            return img, method
+        if verdict == "neutral" and self.fallback is None:
+            self.fallback = (img, method)
+        return None
+
+    def try_list(self, cands, method, limit):
+        for c in cands[:limit]:
+            found = self.try_candidate(c, method)
+            if found:
+                return found
+        return None
+
+
+def _page_candidates(session, url, domain=None, brand=None):
+    """(candidates, parked) for the domain's homepage (url=None) or for one page url."""
+    if url is None:
+        final, html = fetch_homepage(session, domain)
+    else:
+        r, body = _get(session, url, MAX_PAGE_BYTES)
+        if r is None or r.status_code >= 400 or "html" not in r.headers.get("content-type", "html").lower():
+            return [], False
+        final, html = r.url, body.decode(r.encoding or "utf-8", errors="replace")
+    if not html:
+        return [], False
+    if is_parked(final, html, domain if url is None else None):
+        return [], True
+    return parse_page(final, html, brand), False
+
+
+def find_logo(domain=None, extra_urls=(), session=None):
+    """Search without caching. Returns (PIL image, method) or (None, None). method is one of
+    site-logo, extra-logo, site-icon, extra-icon, google-favicon, ddg-favicon,
+    or any of those plus '-mono' when only a white/black/gray image was found."""
+    session = session or requests.Session()
+    session.headers.update(HEADERS)
+    s = _Search(session)
+    brand = brand_label(domain)
+    site, parked = (_page_candidates(session, None, domain, brand) if domain else ([], False))
+    extras = None
+
+    def extra_pages():
+        nonlocal extras
+        if extras is None:
+            extras = [_page_candidates(session, url, brand=brand)[0] for url in extra_urls]
+        return extras
+
+    def logos(cands):
+        """Logo-tier candidates close to the best one: a strong own logo shuts out weak guesses."""
+        tier = [c for c in cands if c.score >= LOGO_SCORE]
+        best = max((c.score for c in tier), default=0)
+        return [c for c in tier if c.score >= best - 30]
+
+    def icons(cands):
+        return [c for c in cands if c.score < LOGO_SCORE]
+
+    found = s.try_list(logos(site), "site-logo", MAX_LOGO_TRIES)
+    for cands in ([] if found else extra_pages()):
+        found = found or s.try_list(logos(cands), "extra-logo", MAX_LOGO_TRIES)
+    found = found or s.try_list(icons(site), "site-icon", MAX_ICON_TRIES)
+    for cands in ([] if found else extra_pages()):
+        found = found or s.try_list(icons(cands), "extra-icon", MAX_ICON_TRIES)
+    if domain and not parked and not found:
+        for url, method in ((f"https://www.google.com/s2/favicons?domain={domain}&sz=128", "google-favicon"),
+                            (f"https://icons.duckduckgo.com/ip3/{domain}.ico", "ddg-favicon")):
+            found = s.try_candidate(_Candidate(url=url), method)
+            if found:
+                break
+    if found:
+        return found
+    if s.fallback:
+        return s.fallback[0], s.fallback[1] + "-mono"
+    return None, None
+
+
+def _cache_key(domain, key):
+    k = key or domain
+    if not k:
+        raise ValueError("fetch_logo needs a domain or a key")
+    return re.sub(r"[^a-z0-9._-]+", "_", k.lower())
+
+
+def fetch_logo_info(domain, dest_dir, extra_urls=(), key=None, refresh=False, session=None):
+    """Cached find_logo. Returns (Path or None, method or None). The cache lives in dest_dir:
+    <key>.png plus <key>.json ({"method": ...}); key defaults to the normalized domain."""
+    domain = normalize_domain(domain) if domain else None
+    dest = Path(dest_dir)
+    k = _cache_key(domain, key)
+    png, meta = dest / f"{k}.png", dest / f"{k}.json"
+    if not refresh and meta.exists():
+        try:
+            info = json.loads(meta.read_text())
+            if info.get("version") == CACHE_VERSION:
+                if info.get("method") and png.exists():
+                    return png, info["method"]
+                if not info.get("method"):
+                    return None, None
+        except (ValueError, OSError):
+            pass
+    img, method = find_logo(domain, extra_urls, session)
+    dest.mkdir(parents=True, exist_ok=True)
+    if img is not None:
+        img.save(png)
+    elif png.exists():
+        png.unlink()
+    meta.write_text(json.dumps({"version": CACHE_VERSION, "domain": domain, "method": method}))
+    return (png if img is not None else None), method
+
+
+def fetch_logo(domain, dest_dir, extra_urls=(), key=None, refresh=False):
+    """Path to a cached PNG of the domain's logo in dest_dir, or None if none was found."""
+    return fetch_logo_info(domain, dest_dir, extra_urls, key, refresh)[0]
+
+
+def main():
+    ap = argparse.ArgumentParser(description="Find a business logo from its domain")
+    ap.add_argument("domain")
+    ap.add_argument("--out", default="logos", help="Cache folder (default logos/)")
+    ap.add_argument("--extra", action="append", default=[], help="Extra page to search (repeatable)")
+    ap.add_argument("--refresh", action="store_true", help="Ignore the cache")
+    a = ap.parse_args()
+    path, method = fetch_logo_info(a.domain, a.out, a.extra, refresh=a.refresh)
+    if not path:
+        sys.exit(f"No logo found for {a.domain}")
+    print(f"{path} ({method})")
+
+
+if __name__ == "__main__":
+    main()