Manifest position 51 · CrUX rank bucket 1000
https://www.idnes.cz
Coverage complete
Coverage-complete representative audit of homepage, section, article, sign-in and HTTP error templates. Paywalled purchase completion and authenticated account management were not exercised.
Attempts
1 / 3
Judged checks
58 / 58
Blocked
0
Not run
0
This report has no published overall score. Blocked and not-run checks are not passes. A coverage-complete report means every check has a judged outcome; it does not mean every check passed.
All 58 atomic check outcomes
| Principle / check | Status | Confidence | Evidence or reason |
|---|---|---|---|
respect-user-preferencesrespects-color-scheme | issues | high | Under emulated prefers-color-scheme: dark, the body remained rgb(255,255,255) with color-scheme: normal; the dark-condition screenshot is visually identical to light mode. F01 medium: The site ignores the user’s dark color-scheme preference. |
respect-user-preferencesrespects-reduced-motion | pass | high | Under prefers-reduced-motion: reduce the active animation probe returned zero running animations. |
respect-user-preferencesrespects-contrast | pass | high | Under prefers-contrast: more, body and sampled controls remained visible with dark text and visible control colors; contrast defects are recorded separately under sufficient-contrast. |
implement-natural-interactionsview-transitions | pass | high | The platform probe found a non-none computed view-transition-name and no abrupt modal/state swap in sampled navigation surfaces. |
implement-natural-interactionsscroll-driven-animations | pass | high | No scroll-linked visual animation was present and getAnimations() returned zero; repeated scrolling did not expose a main-thread visual effect. |
implement-natural-interactionsphysical-gestures | pass | high | Selected paths use native scrolling and ordinary links/buttons; no custom pointer gesture or scroll-jacking behavior was observed. |
provide-guided-navigationscroll-state-aware-chrome | pass | high | Repeated full-page scrolling preserved predictable browser scrolling and content orientation; no sticky chrome obscured content or JS-driven jank was observed. |
provide-guided-navigationanchored-positioning | pass | high | No tooltip, popover, or edge-positioned menu appeared on the sampled primary paths, so no drifting manually positioned overlay was present. |
provide-guided-navigationdirects-attention | pass | high | Section labels, article breadcrumbs, headline hierarchy, and the 404 recovery links clearly indicate location and destination. |
maximize-content-reduce-noiseno-intrusive-interruptions | pass | high | Load screenshots show no modal/interstitial overlay obscuring content; advertising is in reserved page flow, with its prominence recorded under reduced-chrome. |
maximize-content-reduce-noisesemantic-dismissible-primitives | pass | high | No transient overlay was present on load; sign-in is a dedicated page and the sampled disclosure surfaces did not rely on an ad-hoc modal div. |
maximize-content-reduce-noisereduced-chrome | issues | high | Desktop screenshots show a full-width ad occupying about 230px of a 493px viewport before the masthead; the article headline begins below another similarly dominant ad. F05 high: Advertising dominates the first viewport before editorial content. |
adapt-to-the-form-factorresponsive-no-horizontal-scroll | issues | high | At a 360x800 device viewport, layout metrics report innerWidth/clientWidth 1030 and visual scale 0.3495 because meta viewport is width=1030; the full desktop page is miniaturised and text/actions become extremely small. F02 critical: News pages ship a fixed 1030px desktop viewport instead of a mobile layout. |
adapt-to-the-form-factorcomponent-level-responsiveness | issues | high | The platform probe found no container rules, while 360px captures preserve the full desktop two-column layout at 0.35 scale rather than adapting cards/navigation to the narrow container. F03 high: Reusable news components do not adapt to their available container. |
adapt-to-the-form-factorinput-modality-aware | issues | high | Lighthouse failed target-size and the target probe found the 34x34 sign-in control and many navigation links only 34px high. F04 medium: Many interactive targets are below the recommended touch size. |
support-core-task-successclear-purpose-and-primary-action | pass | high | Homepage headlines make news discovery clear, the article headline makes reading purpose clear, and sign-in exposes a prominent Continue action. |
support-core-task-successprimary-flow-completion | pass | high | The public reading journey reached section and article content; the account entry journey reached the sign-in form without a dead end. |
support-core-task-successclear-system-state-and-recovery | pass | high | The sampled 404 clearly says the page does not exist and offers links to homepage, news, regions, sport and other recovery destinations. |
be-fast-and-stablegood-core-web-vitals | issues | high | Lighthouse measured homepage LCP 10.08s, FCP 5.27s, TBT 337ms and performance 0.48; the article measured LCP 4.64s and performance 0.59. F06 high: Cold-load performance is poor on the homepage and article. |
be-fast-and-stablevisual-stability | issues | high | Article Lighthouse CLS was 0.298; image audits found 28 article and 36 homepage images missing dimensions. F07 high: The article has severe layout shift and many images lack reserved dimensions. |
be-fast-and-stableefficient-main-thread | issues | high | Lighthouse reported about 1.46MB potentially unused JavaScript and 337ms TBT; scripts transferred 1.96MB in the HAR. F08 high: The homepage ships substantial unused JavaScript and blocking work. |
be-fast-and-stableefficient-resource-delivery | issues | high | HAR captured 258 requests and 3.82MB, including seven VeryHigh parser-inserted stylesheets and parser-inserted ad/site scripts; Lighthouse’s separate run saw 365 requests and 5.70MB. F09 high: The critical path is crowded by styles and ad scripts. |
be-fast-and-stabletrim-unused-and-duplicate-code | issues | high | Lighthouse estimated 1.46MB unused JS and 72KB unused CSS; HAR’s largest files are ad-tech bundles, GPT, GTM and prebid. F10 high: Unused code and third-party code dominate the load. |
be-inclusivenames-roles-labels | issues | high | Lighthouse failed image-alt, link-name and frame-title; the homepage image audit found 36 missing alts, and the sign-in probe found email/password controls with no associated label. F11 high: Important images, links, frames and form inputs lack robust accessible names. |
be-inclusivesufficient-contrast | issues | high | Lighthouse’s color-contrast audit failed on the homepage. F12 medium: Some text and controls fail minimum color contrast. |
be-inclusivestructure-and-focus | issues | high | Lighthouse failed heading-order and landmark-one-main; homepage recon exposed no main element and an empty h1, while some unnamed links remain focusable. F13 high: Page structure does not provide a reliable heading and landmark hierarchy. |
be-inclusivelegible-text | issues | high | The 360px screenshot renders the 1030px desktop canvas at 0.3495 scale, making body copy and navigation too small for comfortable reading. F14 high: Mobile text is miniaturised rather than reflowed. |
be-inclusivezoom-reflow-targets-and-media | issues | high | Lighthouse failed target-size and the target probe found the 34x34 sign-in control and many navigation links only 34px high. meta viewport is width=1030 on all sampled news templates, and Lighthouse also failed target-size. F15 critical: The viewport configuration defeats normal mobile reflow. F04 medium: Many interactive targets are below the recommended touch size. |
follow-best-practicesno-console-errors | issues | high | Lighthouse captured two console.error messages from paticka.js for missing infinite-ad position elements. F16 medium: The homepage logs application errors. |
follow-best-practicessound-document-and-assets | issues | high | The image audit found 36 images without dimensions, 29 oversized images, 77 without srcset and 90 legacy-format images on the homepage. F17 medium: Image/document asset hygiene is weak. |
follow-best-practicesbrowser-platform-hygiene | issues | high | Lighthouse failed deprecations, inspector-issues and bf-cache on the homepage. F18 medium: The page triggers deprecated API, inspector and BFCache problems. |
be-discoverabletitle-and-description | pass | high | Homepage and sampled article expose descriptive titles; homepage recon found a specific meta description. |
be-discoverablecrawlable-and-mobile-friendly | issues | high | Lighthouse failed crawlable-anchors, and the viewport is hard-coded to width=1030; robots allows ordinary search crawlers but this page-level markup undermines mobile discovery. F19 high: The page is not mobile-friendly and some links are not crawlable. |
be-discoverablecanonical-and-indexing-signals | pass | high | Homepage returned 200, declares a canonical URL, robots allows ordinary search indexing, and sitemap.xml lists section sitemaps. |
be-discoverablestructured-and-shareable-metadata | pass | high | The article Lighthouse SEO score was 0.92 and the rendered article exposes a specific title/description; no inaccurate rich metadata signal was observed. |
be-private-and-securesecure-transport-and-headers | issues | high | The headers primitive found no CSP, HSTS or nosniff. Cookie audit found 13 cookies with issues, including sso_sync and g_state without Secure and many SameSite=None cookies. F20 high: Transport is HTTPS, but key security headers and cookie flags are missing. |
be-private-and-securedata-minimisation-and-third-parties | issues | high | Tracker evidence found 57 third-party origins and 11 known trackers; HAR attributed 253 of 258 requests and 3.76MB to origins other than www.idnes.cz (including CDN subdomains and ad vendors). F21 high: The page has an exceptionally broad tracking and ad-tech footprint. |
be-private-and-securein-context-permissions-and-modern-auth | issues | high | The login page offers passwords and federated/bank identity options, but its email/password controls have empty autocomplete tokens and no passkey action was observed. F22 medium: The sign-in flow does not expose passkey authentication or standard credential autocomplete. |
be-private-and-securedefensive-browser-policies | issues | high | The response has no clickjacking defense, Referrer-Policy or Permissions-Policy, in addition to missing CSP/HSTS. F23 high: Browser-enforced defensive policies are absent. |
be-resilientprogressive-enhancement | issues | high | Discoverability captured only 7% raw/rendered word overlap for the article, classified it as a JS shell, and observed a consent-settings redirect; the homepage reached 92%. F24 high: An article’s core content is not reliably available to a no-JavaScript crawler. |
be-resilientresilient-runtime-behaviour | pass | high | Menus/content remained usable during narrow, scroll and load probes; no cut-off modal or fragile blank runtime state was observed. |
be-resilientoffline-and-installable | not-applicable | high | Context and sampled surfaces were reviewed for applicability. |
be-resilientnetwork-and-http-failure-states | pass | high | The intentionally missing route presents a clear 404 explanation and multiple recovery links rather than a blank shell. |
be-internationalisedlang-dir-and-logical-properties | pass | high | The homepage declares html lang=cs and rendered Czech reading order correctly; sampled layouts showed no bidirectional content break. |
be-internationalisedlocale-aware-data | pass | high | Dates are rendered in natural Czech form, for example “Sobota 18. července”, rather than an ambiguous numeric-only format. |
be-internationalisedtime-zone-correctness | not-applicable | high | Context and sampled surfaces were reviewed for applicability. |
be-trustworthyno-dark-patterns | pass | high | Ads are visibly labelled Reklama/Advertorial and the sampled sign-in/404 surfaces provide close, recovery, and forgotten-password options without confirmshaming. |
be-trustworthyhumane-error-handling | pass | high | The sign-in page asks for email first with a clear Continue action and offers Forgotten password; no premature inline blame was visible before interaction. |
be-trustworthytrustworthy-input-assistance | issues | high | The login probe reports empty autocomplete on email and password inputs and no associated label elements; placeholders are the only visible field instruction. F25 medium: Sign-in fields omit autocomplete and persistent labels. |
be-trustworthysafe-commercial-and-account-flows | pass | high | The sampled account entry shows clear sign-in, close, forgotten-password and alternate identity choices; no forced continuity was encountered. |
be-sustainableoptimised-assets | issues | high | Homepage images audit found 90 legacy-format images, 77 without srcset, 29 oversized and 28 below-fold images not lazy-loaded. F26 high: Most images use legacy formats and lack responsive delivery. |
be-sustainableno-wasteful-work | issues | high | HAR captured 90 xhr/fetch requests and 35 scripts; the tracker scan found 57 third-party origins, with auctions and sync endpoints active during initial load. F27 high: Background advertising and analytics create substantial avoidable work. |
be-sustainablethird-party-and-media-budget | issues | high | HAR reports 3.76MB of 3.82MB transferred from origins other than www.idnes.cz and multiple large ad-tech bundles; Lighthouse’s run transferred 5.70MB. F28 high: Third-party bytes are disproportionate to the editorial experience. |
be-agent-readystructured-agent-capabilities | not-applicable | high | Context and sampled surfaces were reviewed for applicability. |
be-agent-readyon-device-inference | not-applicable | high | Context and sampled surfaces were reviewed for applicability. |
be-memory-efficientno-leak-under-repeated-interaction | issues | high | After ten bottom/top traversals, heap nodes rose from 648,617 to 934,976 and self size from 38.3MB to 66.9MB; an in-page sample saw DOM elements rise from 1,989 to 10,891. F29 high: Repeated infinite-feed traversal grows the retained page footprint sharply. |
be-memory-efficientbounded-footprint | pass | high | The initial heap summary measured 38.3MB self size; large but proportionate to a media-rich homepage, with the repeated-growth defect recorded separately. |
be-memory-efficientno-detached-dom-or-unbounded-listeners | pass | high | Heap constructor summaries showed no Detached* constructor among the top retained populations; Promise count remained essentially flat (526 to 528). The observed growth is attached infinite-feed content and is recorded separately. |
Provenance
Canonical report: results/atomic/reports/0051-www_idnes_cz.json
Report SHA-256: 4ae6c5dd275b1261292fb6060c15aaef4c60873335229e248008fed41d16ba24
Local retained report: runs/2026-07-17T17-27-24-856Z/atomic-reports/www_idnes_cz/2026-07-18T02-16-28-299Z/report.json
Local evidence root: runs/2026-07-17T17-27-24-856Z/atomic-reports/www_idnes_cz/2026-07-18T02-16-28-299Z
Catalog SHA-256: sha256:78ccfdb2d483f4c57d9dafed80fd86c6265585a56457c8dcfddc254b80fb44d7
Raw screenshots, HARs, traces, heaps, and other browser artifacts are retained at the local evidence root and intentionally are not committed. Artifact paths in the canonical report are relative to that root.