{ "url": "https://www.idnes.cz", "auditedAt": "2026-07-18T02:16:28.299Z", "mode": "report", "status": "completed", "statusDetail": "Coverage-complete representative audit of homepage, section, article, sign-in and HTTP error templates. Paywalled purchase completion and authenticated account management were not exercised.", "page": { "appType": "mpa", "framework": "server-rendered multi-page site with extensive client-side advertising/analytics", "notes": "Homepage raw HTML is highly discoverable; sampled article behavior is affected by consent routing. News templates force a 1030px viewport on mobile." }, "evidenceUsed": [ "screenshot", "dom", "evaluate-probe", "layout-metrics", "trace", "har", "discoverability", "headers", "cookies", "trackers", "secrets", "images", "heap-summary", "lighthouse", "robots.txt", "sitemap.xml", "Modern Web Guidance 0.0.172" ], "guidanceConsulted": [ "dark-mode", "component-specific-light-dark-theme", "accessibility", "adapt-scrollbar-to-contrast-preferences", "same-document-transitions", "cross-document-transitions", "group-element-transitions", "faster-spa-view-transitions", "scrollytelling", "parallax-scroll-effects", "scroll-entry-exit-effects", "carousel-slide-effects", "physics-based-easing", "individual-transform-properties", "animate-element-entry-exit", "animate-to-from-top-layer", "animate-to-intrinsic-sizes", "dynamic-sibling-animations", "interactive-content-reveal", "pull-to-reveal", "swipe-to-remove", "shrinking-header-on-scroll", "scroll-progress-indicator", "scroll-position-aware-elements", "scroll-snap-realtime-feedback", "scroll-snap-state-sync", "scroll-target-on-load", "soft-edge-content-fade", "scrollability-affordance-hints", "anchor-positioning-tab-underline", "position-aware-tooltips", "interest-triggered-tooltips", "interest-triggered-action-previews", "directional-navigation-transitions", "carousel-snap-highlights", "navigation-drawer", "stack-drill-down", "persistent-app-tours", "persistent-toast-notifications", "light-dismiss-a-dialog", "platform-controls-dismiss-dialog", "declarative-dialog-popover-control", "animated-select-picker", "branded-select-styling", "brand-consistent-forms", "custom-select-picker-layouts", "rich-media-picker", "complex-shapes", "shaped-cutouts", "overflow-clipping-control", "visually-texture-content", "apply-webgl-shaders", "interactive-content-in-3d-scenes", "highlight-text-ranges", "prevent-text-wrapping", "customize-scrollbar-color-and-thickness", "export-html-media-from-canvas", "fluid-scaling", "calculate-with-intrinsic-sizes", "css-layout", "size-aware-styling", "content-based-styling", "child-state-based-styling", "design-token-reactivity", "dynamic-sibling-styling", "form-fields-automatically-fit-contents", "improve-text-layout-and-legibility", "forms", "accessible-error-announcement", "required-field-feedback", "validate-input-after-interaction", "identify-inp-causes", "schedule-tasks-by-priority", "optimize-preload-priority", "improve-next-page-load-performance", "interactions-in-complex-layouts", "performance", "visually-stable-font-fallbacks", "break-up-long-tasks", "identify-heavy-scripts", "optimize-script-priority", "defer-rendering-heavy-content", "defer-work-until-scroll-ends", "optimize-image-priority", "conditional-async-dependencies", "expose-canvas-content-to-browser-features", "move-dom-element-without-losing-state", "precise-text-alignment", "visually-stable-mixed-fonts", "css", "html", "reduce-style-repetition", "security", "privacy", "batch-analytics-events", "full-session-analytics", "calculate-total-foreground-time", "passkeys", "passkey-registration", "passkey-authentication", "passkey-reauthentication", "passkey-conditional-create", "passkey-management", "flicker-free-client-side-ab-testing", "consistent-cross-document-transitions", "stabilize-reactive-state", "resilient-context-menus-and-nested-dropdowns", "persistent-top-layer-ui", "detect-initial-visibility-state", "sequence-distributed-events", "translator", "language-detection", "support-global-calendar-systems", "capture-location-agnostic-data", "format-human-readable-durations", "manage-recurring-intervals", "calculate-event-differentials", "coordinate-global-events", "model-partial-time-concepts", "search-hidden-content", "select-menu-interaction", "style-parent-with-has", "autofill-address-form", "autofill-payment-form", "autofill-sign-in-form", "autofill-sign-up-form", "autofill-highlight-inputs", "deliver-optimized-decorative-images", "resolution-optimized-pseudo-elements", "deprioritize-background-fetches", "efficient-background-processing", "webmcp", "agentic-forms", "agentic-javascript-tools", "language-model", "summarizer" ], "artifacts": [ { "type": "other", "path": "evidence/404-state.json", "caption": "404 state", "findingIds": [] }, { "type": "screenshot", "path": "evidence/404.png", "caption": "404", "findingIds": [] }, { "type": "screenshot", "path": "evidence/article-desktop.png", "caption": "article desktop", "findingIds": [ "F05" ] }, { "type": "discoverability", "path": "evidence/article-discoverability", "caption": "article discoverability", "findingIds": [] }, { "type": "screenshot", "path": "evidence/article-discoverability-crawler.png", "caption": "article discoverability crawler", "findingIds": [ "F24" ] }, { "type": "screenshot", "path": "evidence/article-discoverability-rendered.png", "caption": "article discoverability rendered", "findingIds": [ "F24" ] }, { "type": "other", "path": "evidence/article-images.json", "caption": "article images", "findingIds": [ "F07", "F17", "F26" ] }, { "type": "lighthouse", "path": "evidence/article-lighthouse-summary.json", "caption": "article lighthouse summary", "findingIds": [ "F06", "F07" ] }, { "type": "lighthouse", "path": "evidence/article-lighthouse.json", "caption": "article lighthouse", "findingIds": [] }, { "type": "layout", "path": "evidence/article-mobile-layout.json", "caption": "article mobile layout", "condition": "viewport: 360x800", "findingIds": [ "F02", "F15" ] }, { "type": "screenshot", "path": "evidence/article-mobile.png", "caption": "article mobile", "condition": "viewport: 360x800", "findingIds": [ "F02" ] }, { "type": "other", "path": "evidence/contrast-probe.json", "caption": "contrast probe", "findingIds": [ "F12" ] }, { "type": "other", "path": "evidence/focus-targets.json", "caption": "focus targets", "findingIds": [ "F04", "F13" ] }, { "type": "other", "path": "evidence/guidance-list.json", "caption": "guidance list", "findingIds": [] }, { "type": "other", "path": "evidence/guidance-mapped.md", "caption": "guidance mapped", "findingIds": [] }, { "type": "heap", "path": "evidence/heap-baseline.heapsnapshot", "caption": "heap baseline", "findingIds": [ "F29" ] }, { "type": "heap", "path": "evidence/heap-post-repeat.heapsnapshot", "caption": "heap post repeat", "findingIds": [ "F29" ] }, { "type": "heap", "path": "evidence/heap-post.heapsnapshot", "caption": "heap post", "findingIds": [] }, { "type": "other", "path": "evidence/home-content-links.json", "caption": "home content links", "findingIds": [] }, { "type": "other", "path": "evidence/home-cookies.json", "caption": "home cookies", "findingIds": [ "F20" ] }, { "type": "screenshot", "path": "evidence/home-dark-reduced.png", "caption": "home dark reduced", "condition": "prefers-color-scheme: dark; prefers-reduced-motion: reduce", "findingIds": [ "F01" ] }, { "type": "screenshot", "path": "evidence/home-desktop.png", "caption": "home desktop", "findingIds": [ "F05" ] }, { "type": "discoverability", "path": "evidence/home-discoverability", "caption": "home discoverability", "findingIds": [] }, { "type": "screenshot", "path": "evidence/home-discoverability-crawler.png", "caption": "home discoverability crawler", "findingIds": [] }, { "type": "screenshot", "path": "evidence/home-discoverability-rendered.png", "caption": "home discoverability rendered", "findingIds": [] }, { "type": "dom", "path": "evidence/home-dom.json", "caption": "home dom", "findingIds": [ "F13" ] }, { "type": "other", "path": "evidence/home-headers.json", "caption": "home headers", "findingIds": [ "F20", "F23" ] }, { "type": "other", "path": "evidence/home-images.json", "caption": "home images", "findingIds": [ "F07", "F11", "F17", "F26" ] }, { "type": "lighthouse", "path": "evidence/home-lighthouse-summary.json", "caption": "home lighthouse summary", "findingIds": [ "F04", "F06", "F08", "F09", "F10", "F11", "F12", "F13", "F15", "F16", "F18", "F19", "F28" ] }, { "type": "lighthouse", "path": "evidence/home-lighthouse.json", "caption": "home lighthouse", "findingIds": [] }, { "type": "layout", "path": "evidence/home-mobile-layout.json", "caption": "home mobile layout", "condition": "viewport: 360x800", "findingIds": [ "F02", "F14", "F15" ] }, { "type": "screenshot", "path": "evidence/home-mobile.png", "caption": "home mobile", "condition": "viewport: 360x800", "findingIds": [ "F02", "F03", "F14" ] }, { "type": "other", "path": "evidence/home-recon.json", "caption": "home recon", "findingIds": [ "F19" ] }, { "type": "other", "path": "evidence/home-secrets.json", "caption": "home secrets", "findingIds": [] }, { "type": "other", "path": "evidence/home-summary.json", "caption": "home summary", "findingIds": [ "F08", "F09", "F10", "F21", "F27", "F28" ] }, { "type": "trace-summary", "path": "evidence/home-trace-summary.json", "caption": "home trace summary", "findingIds": [ "F06" ] }, { "type": "trace", "path": "evidence/home-trace.json", "caption": "home trace", "findingIds": [] }, { "type": "other", "path": "evidence/home-trackers.json", "caption": "home trackers", "findingIds": [ "F21", "F27" ] }, { "type": "har", "path": "evidence/home.har", "caption": "home", "findingIds": [ "F09", "F21", "F27", "F28" ] }, { "type": "screenshot", "path": "evidence/login-desktop.png", "caption": "login desktop", "findingIds": [] }, { "type": "other", "path": "evidence/login-form.json", "caption": "login form", "findingIds": [ "F11", "F22", "F25" ] }, { "type": "screenshot", "path": "evidence/login-mobile.png", "caption": "login mobile", "condition": "viewport: 360x800", "findingIds": [ "F22", "F25" ] }, { "type": "other", "path": "evidence/memory-metrics.json", "caption": "memory metrics", "findingIds": [ "F29" ] }, { "type": "other", "path": "evidence/platform-probe.json", "caption": "platform probe", "findingIds": [ "F01", "F03" ] }, { "type": "other", "path": "evidence/robots-headers.txt", "caption": "robots headers", "findingIds": [] }, { "type": "other", "path": "evidence/robots.txt", "caption": "robots", "findingIds": [ "F19" ] }, { "type": "screenshot", "path": "evidence/section-desktop.png", "caption": "section desktop", "findingIds": [] }, { "type": "layout", "path": "evidence/section-mobile-layout.json", "caption": "section mobile layout", "condition": "viewport: 360x800", "findingIds": [] }, { "type": "other", "path": "evidence/sitemap-headers.txt", "caption": "sitemap headers", "findingIds": [] }, { "type": "other", "path": "evidence/sitemap.xml", "caption": "sitemap", "findingIds": [] } ], "config": { "loaded": false }, "coverage": { "catalogVersion": "modern-web-guidance@0.0.172", "catalogChecksum": "sha256:78ccfdb2d483f4c57d9dafed80fd86c6265585a56457c8dcfddc254b80fb44d7", "expected": 58, "recorded": 58, "judged": 58, "blocked": 0, "notRun": 0, "missing": 0, "unknown": 0, "duplicates": 0, "complete": true }, "checkOutcomes": [ { "principleId": "respect-user-preferences", "checkId": "respects-color-scheme", "status": "issues", "confidence": "high", "method": "Active browser evidence and artifact comparison against the mapped guidance.", "evidence": "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.", "pathIds": [ "home" ], "artifacts": [ "evidence/home-dark-reduced.png", "evidence/platform-probe.json" ], "findingIds": [ "F01" ] }, { "principleId": "respect-user-preferences", "checkId": "respects-reduced-motion", "status": "pass", "confidence": "high", "method": "Direct review of representative browser evidence against the check outcome.", "evidence": "Under prefers-reduced-motion: reduce the active animation probe returned zero running animations.", "pathIds": [ "home" ], "artifacts": [ "evidence/platform-probe.json" ] }, { "principleId": "respect-user-preferences", "checkId": "respects-contrast", "status": "pass", "confidence": "high", "method": "Direct review of representative browser evidence against the check outcome.", "evidence": "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.", "pathIds": [ "home" ], "artifacts": [ "evidence/contrast-probe.json" ] }, { "principleId": "implement-natural-interactions", "checkId": "view-transitions", "status": "pass", "confidence": "high", "method": "Direct review of representative browser evidence against the check outcome.", "evidence": "The platform probe found a non-none computed view-transition-name and no abrupt modal/state swap in sampled navigation surfaces.", "pathIds": [ "home" ], "artifacts": [ "evidence/platform-probe.json" ] }, { "principleId": "implement-natural-interactions", "checkId": "scroll-driven-animations", "status": "pass", "confidence": "high", "method": "Direct review of representative browser evidence against the check outcome.", "evidence": "No scroll-linked visual animation was present and getAnimations() returned zero; repeated scrolling did not expose a main-thread visual effect.", "pathIds": [ "home" ], "artifacts": [ "evidence/platform-probe.json" ] }, { "principleId": "implement-natural-interactions", "checkId": "physical-gestures", "status": "pass", "confidence": "high", "method": "Direct review of representative browser evidence against the check outcome.", "evidence": "Selected paths use native scrolling and ordinary links/buttons; no custom pointer gesture or scroll-jacking behavior was observed.", "pathIds": [ "home" ], "artifacts": [ "evidence/home-mobile-layout.json" ] }, { "principleId": "provide-guided-navigation", "checkId": "scroll-state-aware-chrome", "status": "pass", "confidence": "high", "method": "Direct review of representative browser evidence against the check outcome.", "evidence": "Repeated full-page scrolling preserved predictable browser scrolling and content orientation; no sticky chrome obscured content or JS-driven jank was observed.", "pathIds": [ "home" ], "artifacts": [ "evidence/memory-metrics.json" ] }, { "principleId": "provide-guided-navigation", "checkId": "anchored-positioning", "status": "pass", "confidence": "high", "method": "Direct review of representative browser evidence against the check outcome.", "evidence": "No tooltip, popover, or edge-positioned menu appeared on the sampled primary paths, so no drifting manually positioned overlay was present.", "pathIds": [ "home" ], "artifacts": [ "evidence/platform-probe.json" ] }, { "principleId": "provide-guided-navigation", "checkId": "directs-attention", "status": "pass", "confidence": "high", "method": "Direct review of representative browser evidence against the check outcome.", "evidence": "Section labels, article breadcrumbs, headline hierarchy, and the 404 recovery links clearly indicate location and destination.", "pathIds": [ "home" ], "artifacts": [ "evidence/article-desktop.png", "evidence/404.png" ] }, { "principleId": "maximize-content-reduce-noise", "checkId": "no-intrusive-interruptions", "status": "pass", "confidence": "high", "method": "Direct review of representative browser evidence against the check outcome.", "evidence": "Load screenshots show no modal/interstitial overlay obscuring content; advertising is in reserved page flow, with its prominence recorded under reduced-chrome.", "pathIds": [ "home" ], "artifacts": [ "evidence/home-desktop.png" ] }, { "principleId": "maximize-content-reduce-noise", "checkId": "semantic-dismissible-primitives", "status": "pass", "confidence": "high", "method": "Direct review of representative browser evidence against the check outcome.", "evidence": "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.", "pathIds": [ "home" ], "artifacts": [ "evidence/platform-probe.json", "evidence/login-desktop.png" ] }, { "principleId": "maximize-content-reduce-noise", "checkId": "reduced-chrome", "status": "issues", "confidence": "high", "method": "Active browser evidence and artifact comparison against the mapped guidance.", "evidence": "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.", "pathIds": [ "home" ], "artifacts": [ "evidence/home-desktop.png", "evidence/article-desktop.png" ], "findingIds": [ "F05" ] }, { "principleId": "adapt-to-the-form-factor", "checkId": "responsive-no-horizontal-scroll", "status": "issues", "confidence": "high", "method": "Active browser evidence and artifact comparison against the mapped guidance.", "evidence": "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.", "pathIds": [ "home" ], "artifacts": [ "evidence/home-mobile.png", "evidence/home-mobile-layout.json", "evidence/article-mobile.png", "evidence/article-mobile-layout.json" ], "findingIds": [ "F02" ] }, { "principleId": "adapt-to-the-form-factor", "checkId": "component-level-responsiveness", "status": "issues", "confidence": "high", "method": "Active browser evidence and artifact comparison against the mapped guidance.", "evidence": "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.", "pathIds": [ "home" ], "artifacts": [ "evidence/home-mobile.png", "evidence/platform-probe.json" ], "findingIds": [ "F03" ] }, { "principleId": "adapt-to-the-form-factor", "checkId": "input-modality-aware", "status": "issues", "confidence": "high", "method": "Active browser evidence and artifact comparison against the mapped guidance.", "evidence": "Lighthouse failed target-size and the target probe found the 34x34 sign-in control and many navigation links only 34px high.", "pathIds": [ "home" ], "artifacts": [ "evidence/focus-targets.json", "evidence/home-lighthouse-summary.json" ], "findingIds": [ "F04" ] }, { "principleId": "support-core-task-success", "checkId": "clear-purpose-and-primary-action", "status": "pass", "confidence": "high", "method": "Direct review of representative browser evidence against the check outcome.", "evidence": "Homepage headlines make news discovery clear, the article headline makes reading purpose clear, and sign-in exposes a prominent Continue action.", "pathIds": [ "home" ], "artifacts": [ "evidence/home-desktop.png", "evidence/article-desktop.png", "evidence/login-mobile.png" ] }, { "principleId": "support-core-task-success", "checkId": "primary-flow-completion", "status": "pass", "confidence": "high", "method": "Direct review of representative browser evidence against the check outcome.", "evidence": "The public reading journey reached section and article content; the account entry journey reached the sign-in form without a dead end.", "pathIds": [ "home" ], "artifacts": [ "evidence/section-desktop.png", "evidence/article-desktop.png", "evidence/login-mobile.png" ] }, { "principleId": "support-core-task-success", "checkId": "clear-system-state-and-recovery", "status": "pass", "confidence": "high", "method": "Direct review of representative browser evidence against the check outcome.", "evidence": "The sampled 404 clearly says the page does not exist and offers links to homepage, news, regions, sport and other recovery destinations.", "pathIds": [ "home" ], "artifacts": [ "evidence/404.png", "evidence/404-state.json" ] }, { "principleId": "be-fast-and-stable", "checkId": "good-core-web-vitals", "status": "issues", "confidence": "high", "method": "Active browser evidence and artifact comparison against the mapped guidance.", "evidence": "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.", "pathIds": [ "home" ], "artifacts": [ "evidence/home-lighthouse-summary.json", "evidence/article-lighthouse-summary.json", "evidence/home-trace-summary.json" ], "findingIds": [ "F06" ] }, { "principleId": "be-fast-and-stable", "checkId": "visual-stability", "status": "issues", "confidence": "high", "method": "Active browser evidence and artifact comparison against the mapped guidance.", "evidence": "Article Lighthouse CLS was 0.298; image audits found 28 article and 36 homepage images missing dimensions.", "pathIds": [ "article" ], "artifacts": [ "evidence/article-lighthouse-summary.json", "evidence/article-images.json", "evidence/home-images.json" ], "findingIds": [ "F07" ] }, { "principleId": "be-fast-and-stable", "checkId": "efficient-main-thread", "status": "issues", "confidence": "high", "method": "Active browser evidence and artifact comparison against the mapped guidance.", "evidence": "Lighthouse reported about 1.46MB potentially unused JavaScript and 337ms TBT; scripts transferred 1.96MB in the HAR.", "pathIds": [ "home" ], "artifacts": [ "evidence/home-lighthouse-summary.json", "evidence/home-summary.json" ], "findingIds": [ "F08" ] }, { "principleId": "be-fast-and-stable", "checkId": "efficient-resource-delivery", "status": "issues", "confidence": "high", "method": "Active browser evidence and artifact comparison against the mapped guidance.", "evidence": "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.", "pathIds": [ "home" ], "artifacts": [ "evidence/home.har", "evidence/home-summary.json", "evidence/home-lighthouse-summary.json" ], "findingIds": [ "F09" ] }, { "principleId": "be-fast-and-stable", "checkId": "trim-unused-and-duplicate-code", "status": "issues", "confidence": "high", "method": "Active browser evidence and artifact comparison against the mapped guidance.", "evidence": "Lighthouse estimated 1.46MB unused JS and 72KB unused CSS; HAR’s largest files are ad-tech bundles, GPT, GTM and prebid.", "pathIds": [ "home" ], "artifacts": [ "evidence/home-lighthouse-summary.json", "evidence/home-summary.json" ], "findingIds": [ "F10" ] }, { "principleId": "be-inclusive", "checkId": "names-roles-labels", "status": "issues", "confidence": "high", "method": "Active browser evidence and artifact comparison against the mapped guidance.", "evidence": "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.", "pathIds": [ "home" ], "artifacts": [ "evidence/home-lighthouse-summary.json", "evidence/home-images.json", "evidence/login-form.json" ], "findingIds": [ "F11" ] }, { "principleId": "be-inclusive", "checkId": "sufficient-contrast", "status": "issues", "confidence": "high", "method": "Active browser evidence and artifact comparison against the mapped guidance.", "evidence": "Lighthouse’s color-contrast audit failed on the homepage.", "pathIds": [ "home" ], "artifacts": [ "evidence/home-lighthouse-summary.json", "evidence/contrast-probe.json" ], "findingIds": [ "F12" ] }, { "principleId": "be-inclusive", "checkId": "structure-and-focus", "status": "issues", "confidence": "high", "method": "Active browser evidence and artifact comparison against the mapped guidance.", "evidence": "Lighthouse failed heading-order and landmark-one-main; homepage recon exposed no main element and an empty h1, while some unnamed links remain focusable.", "pathIds": [ "home" ], "artifacts": [ "evidence/home-lighthouse-summary.json", "evidence/home-dom.json", "evidence/focus-targets.json" ], "findingIds": [ "F13" ] }, { "principleId": "be-inclusive", "checkId": "legible-text", "status": "issues", "confidence": "high", "method": "Active browser evidence and artifact comparison against the mapped guidance.", "evidence": "The 360px screenshot renders the 1030px desktop canvas at 0.3495 scale, making body copy and navigation too small for comfortable reading.", "pathIds": [ "home" ], "artifacts": [ "evidence/home-mobile.png", "evidence/home-mobile-layout.json" ], "findingIds": [ "F14" ] }, { "principleId": "be-inclusive", "checkId": "zoom-reflow-targets-and-media", "status": "issues", "confidence": "high", "method": "Active browser evidence and artifact comparison against the mapped guidance.", "evidence": "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.", "pathIds": [ "home" ], "artifacts": [ "evidence/focus-targets.json", "evidence/home-lighthouse-summary.json", "evidence/home-mobile-layout.json", "evidence/article-mobile-layout.json" ], "findingIds": [ "F15", "F04" ] }, { "principleId": "follow-best-practices", "checkId": "no-console-errors", "status": "issues", "confidence": "high", "method": "Active browser evidence and artifact comparison against the mapped guidance.", "evidence": "Lighthouse captured two console.error messages from paticka.js for missing infinite-ad position elements.", "pathIds": [ "home" ], "artifacts": [ "evidence/home-lighthouse-summary.json" ], "findingIds": [ "F16" ] }, { "principleId": "follow-best-practices", "checkId": "sound-document-and-assets", "status": "issues", "confidence": "high", "method": "Active browser evidence and artifact comparison against the mapped guidance.", "evidence": "The image audit found 36 images without dimensions, 29 oversized images, 77 without srcset and 90 legacy-format images on the homepage.", "pathIds": [ "home" ], "artifacts": [ "evidence/home-images.json", "evidence/article-images.json" ], "findingIds": [ "F17" ] }, { "principleId": "follow-best-practices", "checkId": "browser-platform-hygiene", "status": "issues", "confidence": "high", "method": "Active browser evidence and artifact comparison against the mapped guidance.", "evidence": "Lighthouse failed deprecations, inspector-issues and bf-cache on the homepage.", "pathIds": [ "home" ], "artifacts": [ "evidence/home-lighthouse-summary.json" ], "findingIds": [ "F18" ] }, { "principleId": "be-discoverable", "checkId": "title-and-description", "status": "pass", "confidence": "high", "method": "Direct review of representative browser evidence against the check outcome.", "evidence": "Homepage and sampled article expose descriptive titles; homepage recon found a specific meta description.", "pathIds": [ "home" ], "artifacts": [ "evidence/home-recon.json", "evidence/article-lighthouse-summary.json" ] }, { "principleId": "be-discoverable", "checkId": "crawlable-and-mobile-friendly", "status": "issues", "confidence": "high", "method": "Active browser evidence and artifact comparison against the mapped guidance.", "evidence": "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.", "pathIds": [ "home" ], "artifacts": [ "evidence/home-lighthouse-summary.json", "evidence/home-recon.json", "evidence/robots.txt" ], "findingIds": [ "F19" ] }, { "principleId": "be-discoverable", "checkId": "canonical-and-indexing-signals", "status": "pass", "confidence": "high", "method": "Direct review of representative browser evidence against the check outcome.", "evidence": "Homepage returned 200, declares a canonical URL, robots allows ordinary search indexing, and sitemap.xml lists section sitemaps.", "pathIds": [ "home" ], "artifacts": [ "evidence/home-recon.json", "evidence/robots.txt", "evidence/sitemap.xml" ] }, { "principleId": "be-discoverable", "checkId": "structured-and-shareable-metadata", "status": "pass", "confidence": "high", "method": "Direct review of representative browser evidence against the check outcome.", "evidence": "The article Lighthouse SEO score was 0.92 and the rendered article exposes a specific title/description; no inaccurate rich metadata signal was observed.", "pathIds": [ "home" ], "artifacts": [ "evidence/article-lighthouse-summary.json" ] }, { "principleId": "be-private-and-secure", "checkId": "secure-transport-and-headers", "status": "issues", "confidence": "high", "method": "Active browser evidence and artifact comparison against the mapped guidance.", "evidence": "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.", "pathIds": [ "home" ], "artifacts": [ "evidence/home-headers.json", "evidence/home-cookies.json" ], "findingIds": [ "F20" ] }, { "principleId": "be-private-and-secure", "checkId": "data-minimisation-and-third-parties", "status": "issues", "confidence": "high", "method": "Active browser evidence and artifact comparison against the mapped guidance.", "evidence": "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).", "pathIds": [ "home" ], "artifacts": [ "evidence/home-trackers.json", "evidence/home.har", "evidence/home-summary.json" ], "findingIds": [ "F21" ] }, { "principleId": "be-private-and-secure", "checkId": "in-context-permissions-and-modern-auth", "status": "issues", "confidence": "high", "method": "Active browser evidence and artifact comparison against the mapped guidance.", "evidence": "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.", "pathIds": [ "login" ], "artifacts": [ "evidence/login-form.json", "evidence/login-mobile.png" ], "findingIds": [ "F22" ] }, { "principleId": "be-private-and-secure", "checkId": "defensive-browser-policies", "status": "issues", "confidence": "high", "method": "Active browser evidence and artifact comparison against the mapped guidance.", "evidence": "The response has no clickjacking defense, Referrer-Policy or Permissions-Policy, in addition to missing CSP/HSTS.", "pathIds": [ "home" ], "artifacts": [ "evidence/home-headers.json" ], "findingIds": [ "F23" ] }, { "principleId": "be-resilient", "checkId": "progressive-enhancement", "status": "issues", "confidence": "high", "method": "Active browser evidence and artifact comparison against the mapped guidance.", "evidence": "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%.", "pathIds": [ "article" ], "artifacts": [ "evidence/article-discoverability-rendered.png", "evidence/article-discoverability-crawler.png" ], "findingIds": [ "F24" ] }, { "principleId": "be-resilient", "checkId": "resilient-runtime-behaviour", "status": "pass", "confidence": "high", "method": "Direct review of representative browser evidence against the check outcome.", "evidence": "Menus/content remained usable during narrow, scroll and load probes; no cut-off modal or fragile blank runtime state was observed.", "pathIds": [ "home" ], "artifacts": [ "evidence/home-mobile.png", "evidence/login-mobile.png" ] }, { "principleId": "be-resilient", "checkId": "offline-and-installable", "status": "not-applicable", "confidence": "high", "method": "Recon and contextual applicability judgement.", "evidence": "Context and sampled surfaces were reviewed for applicability.", "reason": "iDNES is a public news/content MPA rather than an installable application; offline installability was judged out of scope, while no-JS resilience was tested separately.", "pathIds": [ "home" ] }, { "principleId": "be-resilient", "checkId": "network-and-http-failure-states", "status": "pass", "confidence": "high", "method": "Direct review of representative browser evidence against the check outcome.", "evidence": "The intentionally missing route presents a clear 404 explanation and multiple recovery links rather than a blank shell.", "pathIds": [ "home" ], "artifacts": [ "evidence/404.png", "evidence/404-state.json" ] }, { "principleId": "be-internationalised", "checkId": "lang-dir-and-logical-properties", "status": "pass", "confidence": "high", "method": "Direct review of representative browser evidence against the check outcome.", "evidence": "The homepage declares html lang=cs and rendered Czech reading order correctly; sampled layouts showed no bidirectional content break.", "pathIds": [ "home" ], "artifacts": [ "evidence/home-recon.json" ] }, { "principleId": "be-internationalised", "checkId": "locale-aware-data", "status": "pass", "confidence": "high", "method": "Direct review of representative browser evidence against the check outcome.", "evidence": "Dates are rendered in natural Czech form, for example “Sobota 18. července”, rather than an ambiguous numeric-only format.", "pathIds": [ "home" ], "artifacts": [ "evidence/home-desktop.png" ] }, { "principleId": "be-internationalised", "checkId": "time-zone-correctness", "status": "not-applicable", "confidence": "high", "method": "Recon and contextual applicability judgement.", "evidence": "Context and sampled surfaces were reviewed for applicability.", "reason": "The sampled public news surfaces expose publication dates but no cross-time-zone scheduling, recurring event, or user-entered time workflow to exercise.", "pathIds": [ "home" ] }, { "principleId": "be-trustworthy", "checkId": "no-dark-patterns", "status": "pass", "confidence": "high", "method": "Direct review of representative browser evidence against the check outcome.", "evidence": "Ads are visibly labelled Reklama/Advertorial and the sampled sign-in/404 surfaces provide close, recovery, and forgotten-password options without confirmshaming.", "pathIds": [ "home" ], "artifacts": [ "evidence/home-desktop.png", "evidence/login-mobile.png" ] }, { "principleId": "be-trustworthy", "checkId": "humane-error-handling", "status": "pass", "confidence": "high", "method": "Direct review of representative browser evidence against the check outcome.", "evidence": "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.", "pathIds": [ "home" ], "artifacts": [ "evidence/login-mobile.png" ] }, { "principleId": "be-trustworthy", "checkId": "trustworthy-input-assistance", "status": "issues", "confidence": "high", "method": "Active browser evidence and artifact comparison against the mapped guidance.", "evidence": "The login probe reports empty autocomplete on email and password inputs and no associated label elements; placeholders are the only visible field instruction.", "pathIds": [ "login" ], "artifacts": [ "evidence/login-form.json", "evidence/login-mobile.png" ], "findingIds": [ "F25" ] }, { "principleId": "be-trustworthy", "checkId": "safe-commercial-and-account-flows", "status": "pass", "confidence": "high", "method": "Direct review of representative browser evidence against the check outcome.", "evidence": "The sampled account entry shows clear sign-in, close, forgotten-password and alternate identity choices; no forced continuity was encountered.", "pathIds": [ "home" ], "artifacts": [ "evidence/login-mobile.png" ] }, { "principleId": "be-sustainable", "checkId": "optimised-assets", "status": "issues", "confidence": "high", "method": "Active browser evidence and artifact comparison against the mapped guidance.", "evidence": "Homepage images audit found 90 legacy-format images, 77 without srcset, 29 oversized and 28 below-fold images not lazy-loaded.", "pathIds": [ "home" ], "artifacts": [ "evidence/home-images.json", "evidence/article-images.json" ], "findingIds": [ "F26" ] }, { "principleId": "be-sustainable", "checkId": "no-wasteful-work", "status": "issues", "confidence": "high", "method": "Active browser evidence and artifact comparison against the mapped guidance.", "evidence": "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.", "pathIds": [ "home" ], "artifacts": [ "evidence/home.har", "evidence/home-summary.json", "evidence/home-trackers.json" ], "findingIds": [ "F27" ] }, { "principleId": "be-sustainable", "checkId": "third-party-and-media-budget", "status": "issues", "confidence": "high", "method": "Active browser evidence and artifact comparison against the mapped guidance.", "evidence": "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.", "pathIds": [ "home" ], "artifacts": [ "evidence/home.har", "evidence/home-summary.json", "evidence/home-lighthouse-summary.json" ], "findingIds": [ "F28" ] }, { "principleId": "be-agent-ready", "checkId": "structured-agent-capabilities", "status": "not-applicable", "confidence": "high", "method": "Recon and contextual applicability judgement.", "evidence": "Context and sampled surfaces were reviewed for applicability.", "reason": "Emerging opportunity only: the publisher explicitly blocks named AI crawlers in robots.txt and exposes no declared agent-facing transactional surface, so structured WebMCP tools were judged outside current intent.", "pathIds": [ "home" ] }, { "principleId": "be-agent-ready", "checkId": "on-device-inference", "status": "not-applicable", "confidence": "high", "method": "Recon and contextual applicability judgement.", "evidence": "Context and sampled surfaces were reviewed for applicability.", "reason": "No user task in the sampled news, article, sign-in, or error surfaces requires on-device inference; absence is not penalised for this emerging contextual check.", "pathIds": [ "home" ] }, { "principleId": "be-memory-efficient", "checkId": "no-leak-under-repeated-interaction", "status": "issues", "confidence": "high", "method": "Active browser evidence and artifact comparison against the mapped guidance.", "evidence": "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.", "pathIds": [ "home" ], "artifacts": [ "evidence/heap-baseline.heapsnapshot", "evidence/heap-post-repeat.heapsnapshot", "evidence/memory-metrics.json" ], "findingIds": [ "F29" ] }, { "principleId": "be-memory-efficient", "checkId": "bounded-footprint", "status": "pass", "confidence": "high", "method": "Direct review of representative browser evidence against the check outcome.", "evidence": "The initial heap summary measured 38.3MB self size; large but proportionate to a media-rich homepage, with the repeated-growth defect recorded separately.", "pathIds": [ "home" ], "artifacts": [ "evidence/heap-baseline.heapsnapshot" ] }, { "principleId": "be-memory-efficient", "checkId": "no-detached-dom-or-unbounded-listeners", "status": "pass", "confidence": "high", "method": "Direct review of representative browser evidence against the check outcome.", "evidence": "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.", "pathIds": [ "home" ], "artifacts": [ "evidence/heap-baseline.heapsnapshot", "evidence/heap-post-repeat.heapsnapshot" ] } ], "principleOutcomes": [ { "principleId": "respect-user-preferences", "expectation": "default", "status": "issues", "findingIds": [ "F01" ] }, { "principleId": "implement-natural-interactions", "expectation": "default", "status": "pass", "findingIds": [] }, { "principleId": "provide-guided-navigation", "expectation": "default", "status": "pass", "findingIds": [] }, { "principleId": "maximize-content-reduce-noise", "expectation": "default", "status": "issues", "findingIds": [ "F05" ] }, { "principleId": "adapt-to-the-form-factor", "expectation": "default", "status": "issues", "findingIds": [ "F02", "F03", "F04" ] }, { "principleId": "support-core-task-success", "expectation": "default", "status": "pass", "findingIds": [] }, { "principleId": "be-fast-and-stable", "expectation": "default", "status": "issues", "findingIds": [ "F06", "F07", "F08", "F09", "F10" ] }, { "principleId": "be-inclusive", "expectation": "default", "status": "issues", "findingIds": [ "F11", "F12", "F13", "F14", "F15", "F04" ] }, { "principleId": "follow-best-practices", "expectation": "default", "status": "issues", "findingIds": [ "F16", "F17", "F18" ] }, { "principleId": "be-discoverable", "expectation": "default", "status": "issues", "findingIds": [ "F19" ] }, { "principleId": "be-private-and-secure", "expectation": "default", "status": "issues", "findingIds": [ "F20", "F21", "F22", "F23" ] }, { "principleId": "be-resilient", "expectation": "contextual", "status": "issues", "findingIds": [ "F24" ] }, { "principleId": "be-internationalised", "expectation": "contextual", "status": "pass", "findingIds": [] }, { "principleId": "be-trustworthy", "expectation": "default", "status": "issues", "findingIds": [ "F25" ] }, { "principleId": "be-sustainable", "expectation": "contextual", "status": "issues", "findingIds": [ "F26", "F27", "F28" ] }, { "principleId": "be-agent-ready", "expectation": "contextual", "status": "not-applicable", "findingIds": [], "reason": "Emerging opportunity only: the publisher explicitly blocks named AI crawlers in robots.txt and exposes no declared agent-facing transactional surface, so structured WebMCP tools were judged outside current intent. No user task in the sampled news, article, sign-in, or error surfaces requires on-device inference; absence is not penalised for this emerging contextual check." }, { "principleId": "be-memory-efficient", "expectation": "default", "status": "issues", "findingIds": [ "F29" ] } ], "paths": [ { "id": "home", "description": "Homepage and primary news-discovery surface; tested desktop, 360x800, dark/reduced-motion/high-contrast, performance, network, security, accessibility and memory.", "url": "https://www.idnes.cz/", "conditions": [ "desktop", "viewport: 360x800", "prefers-color-scheme: dark", "prefers-reduced-motion: reduce", "prefers-contrast: more", "10 repeated full-feed traversals" ], "result": "issues" }, { "id": "section", "description": "Zprávy section/listing template, representing editorial category listings.", "url": "https://www.idnes.cz/zpravy", "conditions": [ "desktop", "viewport: 360x800" ], "result": "issues" }, { "id": "article", "description": "Current news article/detail and primary reading task; tested desktop, mobile, discoverability, images and Lighthouse.", "url": "https://www.idnes.cz/zpravy/zahranicni/iran-tvrdi-ze-u-hormuzskeho-prulivu-zacaly-horet-dva-tankery.A260718_005137_zahranicni_air", "conditions": [ "desktop", "viewport: 360x800", "JavaScript-disabled crawler comparison" ], "result": "issues" }, { "id": "login", "description": "Sign-in/account entry form, representing the authentication journey.", "url": "https://www.idnes.cz/ucet/prihlasit", "conditions": [ "desktop", "viewport: 360x800", "form semantics" ], "result": "issues" }, { "id": "error404", "description": "Intentional missing URL, representing HTTP error and recovery behavior.", "url": "https://www.idnes.cz/neexistujici-audit-route", "conditions": [ "desktop" ], "result": "pass" } ], "findings": [ { "id": "F01", "severity": "medium", "confidence": "high", "principleId": "respect-user-preferences", "principleCheckId": "respects-color-scheme", "guidanceId": "dark-mode", "guidanceCategory": "user-experience", "summary": "The site ignores the user’s dark color-scheme preference.", "evidence": "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.", "suggestedFix": "Declare color-scheme and provide preference-driven dark surface/text tokens using prefers-color-scheme or light-dark().", "artifacts": [ "evidence/home-dark-reduced.png", "evidence/platform-probe.json" ], "effort": "medium", "pathId": "home", "url": "https://www.idnes.cz/" }, { "id": "F02", "severity": "critical", "confidence": "high", "principleId": "adapt-to-the-form-factor", "principleCheckId": "responsive-no-horizontal-scroll", "guidanceId": "fluid-scaling", "guidanceCategory": "user-experience", "summary": "News pages ship a fixed 1030px desktop viewport instead of a mobile layout.", "evidence": "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.", "suggestedFix": "Use width=device-width, initial-scale=1 and replace fixed-width page shells with fluid/intrinsic layouts that reflow at narrow widths.", "artifacts": [ "evidence/home-mobile.png", "evidence/home-mobile-layout.json", "evidence/article-mobile.png", "evidence/article-mobile-layout.json" ], "effort": "large", "pathId": "home", "url": "https://www.idnes.cz/" }, { "id": "F03", "severity": "high", "confidence": "high", "principleId": "adapt-to-the-form-factor", "principleCheckId": "component-level-responsiveness", "guidanceId": "size-aware-styling", "guidanceCategory": "user-experience", "summary": "Reusable news components do not adapt to their available container.", "evidence": "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.", "suggestedFix": "Introduce container-type on reusable regions and size-aware @container rules, alongside a fluid page shell.", "artifacts": [ "evidence/home-mobile.png", "evidence/platform-probe.json" ], "effort": "large", "pathId": "home", "url": "https://www.idnes.cz/" }, { "id": "F04", "severity": "medium", "confidence": "high", "principleId": "adapt-to-the-form-factor", "principleCheckId": "input-modality-aware", "guidanceId": "accessibility", "guidanceCategory": "accessibility", "summary": "Many interactive targets are below the recommended touch size.", "evidence": "Lighthouse failed target-size and the target probe found the 34x34 sign-in control and many navigation links only 34px high.", "suggestedFix": "Increase target boxes/spacing to at least 44 CSS px where practical, retain visible :focus-visible styles, and provide non-hover access to submenus.", "artifacts": [ "evidence/focus-targets.json", "evidence/home-lighthouse-summary.json" ], "effort": "medium", "pathId": "home", "url": "https://www.idnes.cz/" }, { "id": "F05", "severity": "high", "confidence": "high", "principleId": "maximize-content-reduce-noise", "principleCheckId": "reduced-chrome", "guidanceId": "reduce-style-repetition", "guidanceCategory": "user-experience", "summary": "Advertising dominates the first viewport before editorial content.", "evidence": "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.", "suggestedFix": "Reserve a smaller, stable ad slot, defer non-critical ad chrome, and prioritise masthead/headline/editorial content in the first viewport.", "artifacts": [ "evidence/home-desktop.png", "evidence/article-desktop.png" ], "effort": "medium", "pathId": "home", "url": "https://www.idnes.cz/" }, { "id": "F06", "severity": "high", "confidence": "high", "principleId": "be-fast-and-stable", "principleCheckId": "good-core-web-vitals", "guidanceId": "performance", "guidanceCategory": "performance", "summary": "Cold-load performance is poor on the homepage and article.", "evidence": "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.", "suggestedFix": "Prioritise the LCP resource, defer non-critical ads/scripts/styles, and split blocking work until mobile LCP is under 2.5s and interactions remain responsive.", "artifacts": [ "evidence/home-lighthouse-summary.json", "evidence/article-lighthouse-summary.json", "evidence/home-trace-summary.json" ], "effort": "large", "pathId": "home", "url": "https://www.idnes.cz/" }, { "id": "F07", "severity": "high", "confidence": "high", "principleId": "be-fast-and-stable", "principleCheckId": "visual-stability", "guidanceId": "visually-stable-font-fallbacks", "guidanceCategory": "user-experience", "summary": "The article has severe layout shift and many images lack reserved dimensions.", "evidence": "Article Lighthouse CLS was 0.298; image audits found 28 article and 36 homepage images missing dimensions.", "suggestedFix": "Set width/height or aspect-ratio for every content/ad image and reserve deterministic space for late ad and font content.", "artifacts": [ "evidence/article-lighthouse-summary.json", "evidence/article-images.json", "evidence/home-images.json" ], "effort": "medium", "pathId": "article", "url": "https://www.idnes.cz/zpravy/zahranicni/iran-tvrdi-ze-u-hormuzskeho-prulivu-zacaly-horet-dva-tankery.A260718_005137_zahranicni_air" }, { "id": "F08", "severity": "high", "confidence": "high", "principleId": "be-fast-and-stable", "principleCheckId": "efficient-main-thread", "guidanceId": "identify-heavy-scripts", "guidanceCategory": "performance", "summary": "The homepage ships substantial unused JavaScript and blocking work.", "evidence": "Lighthouse reported about 1.46MB potentially unused JavaScript and 337ms TBT; scripts transferred 1.96MB in the HAR.", "suggestedFix": "Remove unused bundles, conditionally load advertising/account integrations, split long work, and lower non-critical script priority.", "artifacts": [ "evidence/home-lighthouse-summary.json", "evidence/home-summary.json" ], "effort": "large", "pathId": "home", "url": "https://www.idnes.cz/" }, { "id": "F09", "severity": "high", "confidence": "high", "principleId": "be-fast-and-stable", "principleCheckId": "efficient-resource-delivery", "guidanceId": "optimize-script-priority", "guidanceCategory": "performance", "summary": "The critical path is crowded by styles and ad scripts.", "evidence": "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.", "suggestedFix": "Consolidate critical CSS, defer non-critical styles/scripts, ensure scripts are async/defer/module where safe, and delay ad auctions until after core content.", "artifacts": [ "evidence/home.har", "evidence/home-summary.json", "evidence/home-lighthouse-summary.json" ], "effort": "large", "pathId": "home", "url": "https://www.idnes.cz/" }, { "id": "F10", "severity": "high", "confidence": "high", "principleId": "be-fast-and-stable", "principleCheckId": "trim-unused-and-duplicate-code", "guidanceId": "identify-heavy-scripts", "guidanceCategory": "performance", "summary": "Unused code and third-party code dominate the load.", "evidence": "Lighthouse estimated 1.46MB unused JS and 72KB unused CSS; HAR’s largest files are ad-tech bundles, GPT, GTM and prebid.", "suggestedFix": "Use coverage-driven bundle removal and load third-party code only on pages/interactions that need it.", "artifacts": [ "evidence/home-lighthouse-summary.json", "evidence/home-summary.json" ], "effort": "large", "pathId": "home", "url": "https://www.idnes.cz/" }, { "id": "F11", "severity": "high", "confidence": "high", "principleId": "be-inclusive", "principleCheckId": "names-roles-labels", "guidanceId": "accessibility", "guidanceCategory": "accessibility", "summary": "Important images, links, frames and form inputs lack robust accessible names.", "evidence": "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.", "suggestedFix": "Add meaningful alt text, accessible link/frame names, and persistent programmatic labels for account fields.", "artifacts": [ "evidence/home-lighthouse-summary.json", "evidence/home-images.json", "evidence/login-form.json" ], "effort": "medium", "pathId": "home", "url": "https://www.idnes.cz/" }, { "id": "F12", "severity": "medium", "confidence": "high", "principleId": "be-inclusive", "principleCheckId": "sufficient-contrast", "guidanceId": "accessibility", "guidanceCategory": "accessibility", "summary": "Some text and controls fail minimum color contrast.", "evidence": "Lighthouse’s color-contrast audit failed on the homepage.", "suggestedFix": "Adjust foreground/background tokens to WCAG contrast minimums and verify both default and high-contrast conditions.", "artifacts": [ "evidence/home-lighthouse-summary.json", "evidence/contrast-probe.json" ], "effort": "small", "pathId": "home", "url": "https://www.idnes.cz/" }, { "id": "F13", "severity": "high", "confidence": "high", "principleId": "be-inclusive", "principleCheckId": "structure-and-focus", "guidanceId": "accessibility", "guidanceCategory": "accessibility", "summary": "Page structure does not provide a reliable heading and landmark hierarchy.", "evidence": "Lighthouse failed heading-order and landmark-one-main; homepage recon exposed no main element and an empty h1, while some unnamed links remain focusable.", "suggestedFix": "Add one main landmark, a descriptive h1, sequential headings, and remove or name empty focusable links.", "artifacts": [ "evidence/home-lighthouse-summary.json", "evidence/home-dom.json", "evidence/focus-targets.json" ], "effort": "medium", "pathId": "home", "url": "https://www.idnes.cz/" }, { "id": "F14", "severity": "high", "confidence": "high", "principleId": "be-inclusive", "principleCheckId": "legible-text", "guidanceId": "improve-text-layout-and-legibility", "guidanceCategory": "user-experience", "summary": "Mobile text is miniaturised rather than reflowed.", "evidence": "The 360px screenshot renders the 1030px desktop canvas at 0.3495 scale, making body copy and navigation too small for comfortable reading.", "suggestedFix": "Adopt a device-width viewport and fluid type/line lengths that reflow without requiring pinch zoom.", "artifacts": [ "evidence/home-mobile.png", "evidence/home-mobile-layout.json" ], "effort": "large", "pathId": "home", "url": "https://www.idnes.cz/" }, { "id": "F15", "severity": "critical", "confidence": "high", "principleId": "be-inclusive", "principleCheckId": "zoom-reflow-targets-and-media", "guidanceId": "fluid-scaling", "guidanceCategory": "user-experience", "summary": "The viewport configuration defeats normal mobile reflow.", "evidence": "meta viewport is width=1030 on all sampled news templates, and Lighthouse also failed target-size.", "suggestedFix": "Use width=device-width, permit user scaling, test reflow at 320 CSS px and 200% zoom, and enlarge touch targets.", "artifacts": [ "evidence/home-mobile-layout.json", "evidence/article-mobile-layout.json", "evidence/home-lighthouse-summary.json" ], "effort": "large", "pathId": "home", "url": "https://www.idnes.cz/" }, { "id": "F16", "severity": "medium", "confidence": "high", "principleId": "follow-best-practices", "principleCheckId": "no-console-errors", "guidanceId": "html", "guidanceCategory": "html", "summary": "The homepage logs application errors.", "evidence": "Lighthouse captured two console.error messages from paticka.js for missing infinite-ad position elements.", "suggestedFix": "Guard ad-slot initialisation when its target is absent and remove expected-state console errors.", "artifacts": [ "evidence/home-lighthouse-summary.json" ], "effort": "small", "pathId": "home", "url": "https://www.idnes.cz/" }, { "id": "F17", "severity": "medium", "confidence": "high", "principleId": "follow-best-practices", "principleCheckId": "sound-document-and-assets", "guidanceId": "html", "guidanceCategory": "html", "summary": "Image/document asset hygiene is weak.", "evidence": "The image audit found 36 images without dimensions, 29 oversized images, 77 without srcset and 90 legacy-format images on the homepage.", "suggestedFix": "Emit correct intrinsic dimensions, responsive sources and modern formats while preserving useful alt text.", "artifacts": [ "evidence/home-images.json", "evidence/article-images.json" ], "effort": "large", "pathId": "home", "url": "https://www.idnes.cz/" }, { "id": "F18", "severity": "medium", "confidence": "high", "principleId": "follow-best-practices", "principleCheckId": "browser-platform-hygiene", "guidanceId": "html", "guidanceCategory": "html", "summary": "The page triggers deprecated API, inspector and BFCache problems.", "evidence": "Lighthouse failed deprecations, inspector-issues and bf-cache on the homepage.", "suggestedFix": "Remove deprecated API use, resolve DevTools issues, and eliminate unload/state patterns that block BFCache.", "artifacts": [ "evidence/home-lighthouse-summary.json" ], "effort": "medium", "pathId": "home", "url": "https://www.idnes.cz/" }, { "id": "F19", "severity": "high", "confidence": "high", "principleId": "be-discoverable", "principleCheckId": "crawlable-and-mobile-friendly", "guidanceId": "html", "guidanceCategory": "html", "summary": "The page is not mobile-friendly and some links are not crawlable.", "evidence": "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.", "suggestedFix": "Use real href links with descriptive text and a device-width viewport.", "artifacts": [ "evidence/home-lighthouse-summary.json", "evidence/home-recon.json", "evidence/robots.txt" ], "effort": "large", "pathId": "home", "url": "https://www.idnes.cz/" }, { "id": "F20", "severity": "high", "confidence": "high", "principleId": "be-private-and-secure", "principleCheckId": "secure-transport-and-headers", "guidanceId": "security", "guidanceCategory": "security", "summary": "Transport is HTTPS, but key security headers and cookie flags are missing.", "evidence": "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.", "suggestedFix": "Deploy a restrictive CSP, HSTS and nosniff; minimise SameSite=None and mark every HTTPS cookie Secure, with HttpOnly for session credentials.", "artifacts": [ "evidence/home-headers.json", "evidence/home-cookies.json" ], "effort": "medium", "pathId": "home", "url": "https://www.idnes.cz/" }, { "id": "F21", "severity": "high", "confidence": "high", "principleId": "be-private-and-secure", "principleCheckId": "data-minimisation-and-third-parties", "guidanceId": "privacy", "guidanceCategory": "privacy", "summary": "The page has an exceptionally broad tracking and ad-tech footprint.", "evidence": "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).", "suggestedFix": "Reduce vendors, gate non-essential tracking on explicit consent, batch analytics, and document/justify each retained third party.", "artifacts": [ "evidence/home-trackers.json", "evidence/home.har", "evidence/home-summary.json" ], "effort": "large", "pathId": "home", "url": "https://www.idnes.cz/" }, { "id": "F22", "severity": "medium", "confidence": "high", "principleId": "be-private-and-secure", "principleCheckId": "in-context-permissions-and-modern-auth", "guidanceId": "passkeys", "guidanceCategory": "passkeys", "summary": "The sign-in flow does not expose passkey authentication or standard credential autocomplete.", "evidence": "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.", "suggestedFix": "Add autocomplete=username/current-password and offer WebAuthn passkeys with the existing recovery/federated options.", "artifacts": [ "evidence/login-form.json", "evidence/login-mobile.png" ], "effort": "medium", "pathId": "login", "url": "https://www.idnes.cz/ucet/prihlasit" }, { "id": "F23", "severity": "high", "confidence": "high", "principleId": "be-private-and-secure", "principleCheckId": "defensive-browser-policies", "guidanceId": "security", "guidanceCategory": "security", "summary": "Browser-enforced defensive policies are absent.", "evidence": "The response has no clickjacking defense, Referrer-Policy or Permissions-Policy, in addition to missing CSP/HSTS.", "suggestedFix": "Set CSP frame-ancestors (or X-Frame-Options), Referrer-Policy and a least-privilege Permissions-Policy; consider Trusted Types for XSS-sensitive account surfaces.", "artifacts": [ "evidence/home-headers.json" ], "effort": "medium", "pathId": "home", "url": "https://www.idnes.cz/" }, { "id": "F24", "severity": "high", "confidence": "high", "principleId": "be-resilient", "principleCheckId": "progressive-enhancement", "guidanceId": "stabilize-reactive-state", "guidanceCategory": "user-experience", "summary": "An article’s core content is not reliably available to a no-JavaScript crawler.", "evidence": "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%.", "suggestedFix": "Server-render article title, dek and body independent of JavaScript/consent UI, and make consent an enhancement that does not replace core public content.", "artifacts": [ "evidence/article-discoverability-rendered.png", "evidence/article-discoverability-crawler.png" ], "effort": "large", "pathId": "article", "url": "https://www.idnes.cz/zpravy/zahranicni/iran-tvrdi-ze-u-hormuzskeho-prulivu-zacaly-horet-dva-tankery.A260718_005137_zahranicni_air" }, { "id": "F25", "severity": "medium", "confidence": "high", "principleId": "be-trustworthy", "principleCheckId": "trustworthy-input-assistance", "guidanceId": "autofill-sign-in-form", "guidanceCategory": "forms", "summary": "Sign-in fields omit autocomplete and persistent labels.", "evidence": "The login probe reports empty autocomplete on email and password inputs and no associated label elements; placeholders are the only visible field instruction.", "suggestedFix": "Add persistent labels plus autocomplete=username and current-password, preserving password-manager and assistive-technology support.", "artifacts": [ "evidence/login-form.json", "evidence/login-mobile.png" ], "effort": "small", "pathId": "login", "url": "https://www.idnes.cz/ucet/prihlasit" }, { "id": "F26", "severity": "high", "confidence": "high", "principleId": "be-sustainable", "principleCheckId": "optimised-assets", "guidanceId": "optimize-image-priority", "guidanceCategory": "performance", "summary": "Most images use legacy formats and lack responsive delivery.", "evidence": "Homepage images audit found 90 legacy-format images, 77 without srcset, 29 oversized and 28 below-fold images not lazy-loaded.", "suggestedFix": "Generate AVIF/WebP responsive sources, size them to display density, and lazy-load non-critical images.", "artifacts": [ "evidence/home-images.json", "evidence/article-images.json" ], "effort": "large", "pathId": "home", "url": "https://www.idnes.cz/" }, { "id": "F27", "severity": "high", "confidence": "high", "principleId": "be-sustainable", "principleCheckId": "no-wasteful-work", "guidanceId": "deprioritize-background-fetches", "guidanceCategory": "performance", "summary": "Background advertising and analytics create substantial avoidable work.", "evidence": "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.", "suggestedFix": "Defer auctions/analytics until consent and idle time, batch events, and remove redundant sync/fetch activity.", "artifacts": [ "evidence/home.har", "evidence/home-summary.json", "evidence/home-trackers.json" ], "effort": "large", "pathId": "home", "url": "https://www.idnes.cz/" }, { "id": "F28", "severity": "high", "confidence": "high", "principleId": "be-sustainable", "principleCheckId": "third-party-and-media-budget", "guidanceId": "efficient-background-processing", "guidanceCategory": "performance", "summary": "Third-party bytes are disproportionate to the editorial experience.", "evidence": "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.", "suggestedFix": "Set a third-party byte/request budget, self-host first-party assets where appropriate, and defer or remove vendors that do not improve the reading task.", "artifacts": [ "evidence/home.har", "evidence/home-summary.json", "evidence/home-lighthouse-summary.json" ], "effort": "large", "pathId": "home", "url": "https://www.idnes.cz/" }, { "id": "F29", "severity": "high", "confidence": "high", "principleId": "be-memory-efficient", "principleCheckId": "no-leak-under-repeated-interaction", "guidanceId": "defer-rendering-heavy-content", "guidanceCategory": "performance", "summary": "Repeated infinite-feed traversal grows the retained page footprint sharply.", "evidence": "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.", "suggestedFix": "Virtualise or cap appended feed/ad nodes, release observers/listeners and cached payloads when sections leave the active window, then repeat the same heap comparison.", "artifacts": [ "evidence/heap-baseline.heapsnapshot", "evidence/heap-post-repeat.heapsnapshot", "evidence/memory-metrics.json" ], "effort": "large", "pathId": "home", "url": "https://www.idnes.cz/" } ], "taskList": [ { "id": "T01", "title": "Replace the fixed 1030px mobile viewport with true responsive/reflowing layouts", "priority": 1, "findingIds": [ "F02", "F03", "F14", "F15", "F19" ], "guidanceId": "fluid-scaling", "status": "open" }, { "id": "T02", "title": "Cut initial ad-tech, tracking, request and unused-script cost", "priority": 2, "findingIds": [ "F06", "F08", "F09", "F10", "F21", "F27", "F28" ], "guidanceId": "identify-heavy-scripts", "status": "open" }, { "id": "T03", "title": "Add complete security headers and tighten cookies", "priority": 3, "findingIds": [ "F20", "F23" ], "guidanceId": "security", "status": "open" }, { "id": "T04", "title": "Reserve image/ad space and modernise responsive image delivery", "priority": 4, "findingIds": [ "F07", "F17", "F26" ], "guidanceId": "optimize-image-priority", "status": "open" }, { "id": "T05", "title": "Repair accessible names, landmarks, headings, contrast and touch targets", "priority": 5, "findingIds": [ "F04", "F11", "F12", "F13" ], "guidanceId": "accessibility", "status": "open" }, { "id": "T06", "title": "Server-render article content independently of consent JavaScript", "priority": 6, "findingIds": [ "F24" ], "guidanceId": "stabilize-reactive-state", "status": "open" }, { "id": "T07", "title": "Cap or virtualise infinite-feed DOM and retained heap growth", "priority": 7, "findingIds": [ "F29" ], "guidanceId": "defer-rendering-heavy-content", "status": "open" }, { "id": "T08", "title": "Add preference-driven dark theming", "priority": 8, "findingIds": [ "F01" ], "guidanceId": "dark-mode", "status": "open" }, { "id": "T09", "title": "Add sign-in labels, autocomplete and passkeys", "priority": 9, "findingIds": [ "F22", "F25" ], "guidanceId": "autofill-sign-in-form", "status": "open" }, { "id": "T10", "title": "Resolve console, deprecated API, inspector and BFCache defects", "priority": 10, "findingIds": [ "F16", "F18" ], "guidanceId": "html", "status": "open" }, { "id": "T11", "title": "Reduce above-the-fold advertising dominance", "priority": 11, "findingIds": [ "F05" ], "guidanceId": "reduce-style-repetition", "status": "open" } ], "budget": { "pathCount": 5, "auditPasses": 1 }, "agent": "pi", "runId": "2026-07-18T02-16-28-299Z" }