{ "url": "https://www.seznam.cz", "auditedAt": "2026-07-20T06:46:15.547Z", "mode": "report", "status": "completed", "statusDetail": "Coverage-complete representative audit. Dynamic editorial content and consent state may vary by request.", "page": { "appType": "hybrid", "framework": "server-rendered portal with client widgets", "notes": "Large Czech portal homepage with search, editorial feed, consent management and app-like timetable surface." }, "evidenceUsed": [ "screenshot", "dom", "evaluate-probe", "layout-metrics", "trace", "har", "discoverability", "headers", "cookies", "trackers", "images", "secrets", "heap-summary", "lighthouse" ], "guidanceConsulted": [ "accessibility", "accessible-error-announcement", "language-detection", "language-model", "summarizer", "translator", "css", "highlight-text-ranges", "css-layout", "animated-select-picker", "autofill-address-form", "autofill-highlight-inputs", "autofill-payment-form", "autofill-sign-in-form", "autofill-sign-up-form", "brand-consistent-forms", "branded-select-styling", "custom-select-picker-layouts", "form-fields-automatically-fit-contents", "forms", "required-field-feedback", "rich-media-picker", "select-menu-interaction", "validate-input-after-interaction", "html", "passkey-authentication", "passkey-conditional-create", "passkey-management", "passkey-reauthentication", "passkey-registration", "passkeys", "batch-analytics-events", "break-up-long-tasks", "calculate-total-foreground-time", "conditional-async-dependencies", "defer-rendering-heavy-content", "defer-work-until-scroll-ends", "deprioritize-background-fetches", "detect-initial-visibility-state", "efficient-background-processing", "faster-spa-view-transitions", "full-session-analytics", "identify-heavy-scripts", "identify-inp-causes", "improve-next-page-load-performance", "interactions-in-complex-layouts", "optimize-image-priority", "optimize-preload-priority", "optimize-script-priority", "performance", "resolution-optimized-pseudo-elements", "schedule-tasks-by-priority", "sequence-distributed-events", "privacy", "security", "adapt-scrollbar-to-contrast-preferences", "anchor-positioning-tab-underline", "animate-element-entry-exit", "animate-to-from-top-layer", "animate-to-intrinsic-sizes", "apply-webgl-shaders", "calculate-event-differentials", "calculate-with-intrinsic-sizes", "capture-location-agnostic-data", "carousel-slide-effects", "carousel-snap-highlights", "child-state-based-styling", "complex-shapes", "component-specific-light-dark-theme", "consistent-cross-document-transitions", "content-based-styling", "coordinate-global-events", "cross-document-transitions", "customize-scrollbar-color-and-thickness", "dark-mode", "declarative-button-actions", "declarative-dialog-popover-control", "deliver-optimized-decorative-images", "design-token-reactivity", "directional-navigation-transitions", "dynamic-sibling-animations", "dynamic-sibling-styling", "export-html-media-from-canvas", "expose-canvas-content-to-browser-features", "flicker-free-client-side-ab-testing", "fluid-scaling", "format-human-readable-durations", "group-element-transitions", "improve-text-layout-and-legibility", "individual-transform-properties", "interactive-content-in-3d-scenes", "interactive-content-reveal", "interest-triggered-action-previews", "interest-triggered-tooltips", "light-dismiss-a-dialog", "manage-recurring-intervals", "model-partial-time-concepts", "move-dom-element-without-losing-state", "navigation-drawer", "overflow-clipping-control", "parallax-scroll-effects", "persistent-app-tours", "persistent-toast-notifications", "persistent-top-layer-ui", "physics-based-easing", "platform-controls-dismiss-dialog", "position-aware-tooltips", "precise-text-alignment", "prevent-text-wrapping", "pull-to-reveal", "reduce-style-repetition", "resilient-context-menus-and-nested-dropdowns", "same-document-transitions", "scroll-entry-exit-effects", "scroll-position-aware-elements", "scroll-progress-indicator", "scroll-snap-realtime-feedback", "scroll-snap-state-sync", "scroll-target-on-load", "scrollability-affordance-hints", "scrollytelling", "search-hidden-content", "shaped-cutouts", "shrinking-header-on-scroll", "size-aware-styling", "soft-edge-content-fade", "stabilize-reactive-state", "stack-drill-down", "style-parent-with-has", "support-global-calendar-systems", "swipe-to-remove", "visually-stable-font-fallbacks", "visually-stable-mixed-fonts", "visually-texture-content", "agentic-forms", "agentic-javascript-tools", "webmcp" ], "artifacts": [ { "type": "other", "path": "evidence/404-state.json", "caption": "404 state json" }, { "type": "screenshot", "path": "evidence/404.png", "caption": "404 png" }, { "type": "other", "path": "evidence/controls.json", "caption": "controls json" }, { "type": "other", "path": "evidence/cookies.json", "caption": "cookies json", "findingIds": [ "F021" ] }, { "type": "screenshot", "path": "evidence/discoverability-crawler.png", "caption": "discoverability crawler png" }, { "type": "screenshot", "path": "evidence/discoverability-rendered.png", "caption": "discoverability rendered png" }, { "type": "discoverability", "path": "evidence/discoverability.json", "caption": "discoverability json", "findingIds": [ "F029" ] }, { "type": "other", "path": "evidence/discovery.json", "caption": "discovery json" }, { "type": "other", "path": "evidence/headers.json", "caption": "headers json", "findingIds": [ "F019", "F021" ] }, { "type": "heap", "path": "evidence/heap-baseline.heapsnapshot", "caption": "heap baseline heapsnapshot", "findingIds": [ "F030" ] }, { "type": "heap", "path": "evidence/heap-post.heapsnapshot", "caption": "heap post heapsnapshot", "findingIds": [ "F030" ] }, { "type": "screenshot", "path": "evidence/home-dark.png", "caption": "home dark png", "findingIds": [ "F001" ], "condition": "prefers-color-scheme: dark" }, { "type": "screenshot", "path": "evidence/home-desktop.png", "caption": "home desktop png", "findingIds": [ "F001", "F003" ] }, { "type": "dom", "path": "evidence/home-dom.json", "caption": "home dom json" }, { "type": "screenshot", "path": "evidence/home-high-contrast.png", "caption": "home high contrast png", "findingIds": [ "F013" ], "condition": "prefers-contrast: more; forced-colors: active" }, { "type": "layout", "path": "evidence/home-mobile-layout.json", "caption": "home mobile layout json", "findingIds": [ "F008", "F009" ], "condition": "viewport: 360x800" }, { "type": "screenshot", "path": "evidence/home-mobile.png", "caption": "home mobile png", "findingIds": [ "F003" ], "condition": "viewport: 360x800" }, { "type": "har-summary", "path": "evidence/home-summary.json", "caption": "home summary json", "findingIds": [ "F010", "F011", "F016", "F020", "F026", "F027", "F028" ] }, { "type": "trace-summary", "path": "evidence/home-trace-summary.json", "caption": "home trace summary json", "findingIds": [ "F007", "F009", "F027" ] }, { "type": "trace", "path": "evidence/home-trace.json", "caption": "home trace json", "findingIds": [ "F007" ] }, { "type": "har", "path": "evidence/home.har", "caption": "home har", "findingIds": [ "F010" ] }, { "type": "other", "path": "evidence/images.json", "caption": "images json", "findingIds": [ "F008", "F012", "F017", "F026" ] }, { "type": "lighthouse", "path": "evidence/lighthouse-summary.json", "caption": "lighthouse summary json", "findingIds": [ "F006", "F007", "F009", "F011", "F012", "F013", "F014", "F015", "F016", "F017", "F018", "F029" ] }, { "type": "lighthouse", "path": "evidence/lighthouse.json", "caption": "lighthouse json" }, { "type": "other", "path": "evidence/login-probe.json", "caption": "login probe json", "findingIds": [ "F025" ] }, { "type": "screenshot", "path": "evidence/login.png", "caption": "login png" }, { "type": "other", "path": "evidence/platform-a11y-probe.json", "caption": "platform a11y probe json", "findingIds": [ "F002", "F006", "F012", "F014", "F015", "F028" ] }, { "type": "other", "path": "evidence/recon.json", "caption": "recon json", "findingIds": [ "F004", "F025" ] }, { "type": "other", "path": "evidence/reduced-motion.json", "caption": "reduced motion json" }, { "type": "layout", "path": "evidence/search-mobile-layout.json", "caption": "search mobile layout json", "findingIds": [ "F005", "F015" ], "condition": "viewport: 360x800" }, { "type": "other", "path": "evidence/search-probe.json", "caption": "search probe json" }, { "type": "screenshot", "path": "evidence/search-results.png", "caption": "search results png", "findingIds": [ "F005" ] }, { "type": "other", "path": "evidence/secret-context.json", "caption": "secret context json" }, { "type": "other", "path": "evidence/secrets.json", "caption": "secrets json" }, { "type": "dom", "path": "evidence/settings-dom.json", "caption": "settings dom json", "findingIds": [ "F004" ] }, { "type": "screenshot", "path": "evidence/settings.png", "caption": "settings png", "findingIds": [ "F003", "F004", "F023" ] }, { "type": "screenshot", "path": "evidence/timetables-invalid.png", "caption": "timetables invalid png", "findingIds": [ "F024" ] }, { "type": "layout", "path": "evidence/timetables-mobile-layout.json", "caption": "timetables mobile layout json", "condition": "viewport: 360x800" }, { "type": "other", "path": "evidence/timetables-probe.json", "caption": "timetables probe json", "findingIds": [ "F022", "F024", "F025" ] }, { "type": "screenshot", "path": "evidence/timetables.png", "caption": "timetables png", "findingIds": [ "F022", "F024" ] }, { "type": "other", "path": "evidence/trackers.json", "caption": "trackers json", "findingIds": [ "F020" ] } ], "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": "Direct visual/objective evidence gathered for the mapped check.", "evidence": "Desktop screenshots under light and prefers-color-scheme: dark are pixel-identical in surface treatment; the rendered CSS declares color-scheme: light.", "pathIds": [ "home" ], "artifacts": [ "evidence/home-desktop.png", "evidence/home-dark.png" ], "findingIds": [ "F001" ] }, { "principleId": "respect-user-preferences", "checkId": "respects-reduced-motion", "status": "pass", "confidence": "high", "method": "Direct inspection/probe across the representative paths.", "evidence": "evaluate under prefers-reduced-motion: reduce found no active animations.", "pathIds": [ "home" ], "artifacts": [ "evidence/reduced-motion.json" ] }, { "principleId": "respect-user-preferences", "checkId": "respects-contrast", "status": "pass", "confidence": "high", "method": "Direct inspection/probe across the representative paths.", "evidence": "Forced-colors/prefers-contrast screenshot retained readable controls and content.", "pathIds": [ "home" ], "artifacts": [ "evidence/home-high-contrast.png" ] }, { "principleId": "implement-natural-interactions", "checkId": "view-transitions", "status": "issues", "confidence": "high", "method": "Direct visual/objective evidence gathered for the mapped check.", "evidence": "The platform probe found no view-transition CSS while the portal has tab, menu and content state changes.", "pathIds": [ "home" ], "artifacts": [ "evidence/platform-a11y-probe.json" ], "findingIds": [ "F002" ] }, { "principleId": "implement-natural-interactions", "checkId": "scroll-driven-animations", "status": "pass", "confidence": "high", "method": "Direct inspection/probe across the representative paths.", "evidence": "CSS inspection found scroll-timeline/animation-timeline use rather than only scroll handlers.", "pathIds": [ "home" ], "artifacts": [ "evidence/platform-a11y-probe.json" ] }, { "principleId": "implement-natural-interactions", "checkId": "physical-gestures", "status": "pass", "confidence": "high", "method": "Direct inspection/probe across the representative paths.", "evidence": "Mobile portal uses native horizontal scrolling and platform controls without evidence of pointermove-driven gesture replacement.", "pathIds": [ "home" ], "artifacts": [ "evidence/home-mobile.png", "evidence/platform-a11y-probe.json" ] }, { "principleId": "provide-guided-navigation", "checkId": "scroll-state-aware-chrome", "status": "pass", "confidence": "high", "method": "Direct inspection/probe across the representative paths.", "evidence": "Rendered DOM includes sticky-header search chrome and CSS scroll timelines that respond to position.", "pathIds": [ "home" ], "artifacts": [ "evidence/home-dom.json", "evidence/platform-a11y-probe.json" ] }, { "principleId": "provide-guided-navigation", "checkId": "anchored-positioning", "status": "not-applicable", "confidence": "high", "method": "Applicability judgement from representative-route recon.", "evidence": "No tooltip, popover or edge-positioned menu archetype was present in the representative surfaces, so there was no anchored overlay to assess.", "reason": "No tooltip, popover or edge-positioned menu archetype was present in the representative surfaces, so there was no anchored overlay to assess.", "pathIds": [ "home" ] }, { "principleId": "provide-guided-navigation", "checkId": "directs-attention", "status": "pass", "confidence": "high", "method": "Direct inspection/probe across the representative paths.", "evidence": "Active search tabs, section headings and a direct 404 return action visibly orient the user.", "pathIds": [ "home" ], "artifacts": [ "evidence/search-results.png", "evidence/404.png" ] }, { "principleId": "maximize-content-reduce-noise", "checkId": "no-intrusive-interruptions", "status": "issues", "confidence": "high", "method": "Direct visual/objective evidence gathered for the mapped check.", "evidence": "Desktop and 360px screenshots show a fixed consent sheet covering the lower viewport before interaction; on mobile it hides the lead story.", "pathIds": [ "home" ], "artifacts": [ "evidence/home-desktop.png", "evidence/home-mobile.png", "evidence/settings.png" ], "findingIds": [ "F003" ] }, { "principleId": "maximize-content-reduce-noise", "checkId": "semantic-dismissible-primitives", "status": "issues", "confidence": "high", "method": "Direct visual/objective evidence gathered for the mapped check.", "evidence": "The homepage overlay was absent from dialog/[role=dialog]/aria-modal probes, while the settings DOM uses a custom .szn-cmp-dialog-container.", "pathIds": [ "home" ], "artifacts": [ "evidence/recon.json", "evidence/settings-dom.json", "evidence/settings.png" ], "findingIds": [ "F004" ] }, { "principleId": "maximize-content-reduce-noise", "checkId": "reduced-chrome", "status": "pass", "confidence": "high", "method": "Direct inspection/probe across the representative paths.", "evidence": "Outside the consent layer, the portal prioritises search, weather and editorial content with restrained framing.", "pathIds": [ "home" ], "artifacts": [ "evidence/home-mobile.png" ] }, { "principleId": "adapt-to-the-form-factor", "checkId": "responsive-no-horizontal-scroll", "status": "issues", "confidence": "high", "method": "Direct visual/objective evidence gathered for the mapped check.", "evidence": "At 360x800 the search result layout reported scrollWidth 1232px, clientWidth 360px and 872px horizontal overflow.", "pathIds": [ "search" ], "artifacts": [ "evidence/search-mobile-layout.json", "evidence/search-results.png" ], "findingIds": [ "F005" ] }, { "principleId": "adapt-to-the-form-factor", "checkId": "component-level-responsiveness", "status": "pass", "confidence": "high", "method": "Direct inspection/probe across the representative paths.", "evidence": "CSS inspection found 66 container-query rules and the homepage itself has no horizontal overflow at 360px.", "pathIds": [ "home" ], "artifacts": [ "evidence/platform-a11y-probe.json", "evidence/home-mobile-layout.json" ] }, { "principleId": "adapt-to-the-form-factor", "checkId": "input-modality-aware", "status": "issues", "confidence": "high", "method": "Direct visual/objective evidence gathered for the mapped check.", "evidence": "The focus probe found none/0px outlines on search tabs, submit buttons and article links; many controls are 28-32px high. Lighthouse also failed target-size.", "pathIds": [ "home" ], "artifacts": [ "evidence/platform-a11y-probe.json", "evidence/lighthouse-summary.json" ], "findingIds": [ "F006" ] }, { "principleId": "support-core-task-success", "checkId": "clear-purpose-and-primary-action", "status": "pass", "confidence": "high", "method": "Direct inspection/probe across the representative paths.", "evidence": "The first viewport clearly presents Seznam search and a prominent submit action.", "pathIds": [ "home", "search", "timetables", "not-found" ], "artifacts": [ "evidence/home-desktop.png" ] }, { "principleId": "support-core-task-success", "checkId": "primary-flow-completion", "status": "pass", "confidence": "high", "method": "Direct inspection/probe across the representative paths.", "evidence": "A representative query loaded a populated results page and timetable exposes an actionable route form.", "pathIds": [ "home", "search", "timetables", "not-found" ], "artifacts": [ "evidence/search-results.png", "evidence/timetables.png" ] }, { "principleId": "support-core-task-success", "checkId": "clear-system-state-and-recovery", "status": "pass", "confidence": "high", "method": "Direct inspection/probe across the representative paths.", "evidence": "A nonexistent route returns a clear Czech explanation, homepage return button and support links.", "pathIds": [ "home", "search", "timetables", "not-found" ], "artifacts": [ "evidence/404.png", "evidence/404-state.json" ] }, { "principleId": "be-fast-and-stable", "checkId": "good-core-web-vitals", "status": "issues", "confidence": "high", "method": "Direct visual/objective evidence gathered for the mapped check.", "evidence": "Lighthouse measured LCP 10.6s, FCP 8.6s, TBT 800ms and performance 33; the trace independently measured LCP 4.13s and TBT 302ms.", "pathIds": [ "home" ], "artifacts": [ "evidence/lighthouse-summary.json", "evidence/home-trace-summary.json", "evidence/home-trace.json" ], "findingIds": [ "F007" ] }, { "principleId": "be-fast-and-stable", "checkId": "visual-stability", "status": "issues", "confidence": "high", "method": "Direct visual/objective evidence gathered for the mapped check.", "evidence": "The 360px layout observer measured CLS 0.125 with a 0.096 shift around 6.9s; all 100 inspected images lacked width/height attributes.", "pathIds": [ "home" ], "artifacts": [ "evidence/home-mobile-layout.json", "evidence/images.json" ], "findingIds": [ "F008" ] }, { "principleId": "be-fast-and-stable", "checkId": "efficient-main-thread", "status": "issues", "confidence": "high", "method": "Direct visual/objective evidence gathered for the mapped check.", "evidence": "The trace recorded six long tasks (longest 163ms, TBT 302ms); mobile layout recorded tasks up to 206ms and Lighthouse TBT was 800ms.", "pathIds": [ "home" ], "artifacts": [ "evidence/home-trace-summary.json", "evidence/home-mobile-layout.json", "evidence/lighthouse-summary.json" ], "findingIds": [ "F009" ] }, { "principleId": "be-fast-and-stable", "checkId": "efficient-resource-delivery", "status": "issues", "confidence": "high", "method": "Direct visual/objective evidence gathered for the mapped check.", "evidence": "HAR captured 480 requests and 16.7MB transferred, including 315 images/14.2MB and six redirects; many preview images lacked cache headers.", "pathIds": [ "home" ], "artifacts": [ "evidence/home-summary.json", "evidence/home.har" ], "findingIds": [ "F010" ] }, { "principleId": "be-fast-and-stable", "checkId": "trim-unused-and-duplicate-code", "status": "issues", "confidence": "high", "method": "Direct visual/objective evidence gathered for the mapped check.", "evidence": "HAR recorded 452 third-party-origin requests and a 644KB client bundle plus 406KB assistant widget and 153KB tag manager; Lighthouse reported TTI 65.6s.", "pathIds": [ "home" ], "artifacts": [ "evidence/home-summary.json", "evidence/lighthouse-summary.json" ], "findingIds": [ "F011" ] }, { "principleId": "be-inclusive", "checkId": "names-roles-labels", "status": "issues", "confidence": "high", "method": "Direct visual/objective evidence gathered for the mapped check.", "evidence": "Lighthouse failed button-name, image-alt, link-name and frame-title; the image probe counted 61/100 images without alt, and DOM probes found unnamed buttons/links.", "pathIds": [ "home" ], "artifacts": [ "evidence/lighthouse-summary.json", "evidence/images.json", "evidence/platform-a11y-probe.json" ], "findingIds": [ "F012" ] }, { "principleId": "be-inclusive", "checkId": "sufficient-contrast", "status": "issues", "confidence": "high", "method": "Direct visual/objective evidence gathered for the mapped check.", "evidence": "Lighthouse accessibility scored 70 and failed the color-contrast audit on the rendered homepage.", "pathIds": [ "home" ], "artifacts": [ "evidence/lighthouse-summary.json", "evidence/home-high-contrast.png" ], "findingIds": [ "F013" ] }, { "principleId": "be-inclusive", "checkId": "structure-and-focus", "status": "issues", "confidence": "high", "method": "Direct visual/objective evidence gathered for the mapped check.", "evidence": "Lighthouse failed heading-order; the DOM begins with empty H1s then H6 before H2, and the focus probe found invisible focus on most tested links/buttons.", "pathIds": [ "home" ], "artifacts": [ "evidence/platform-a11y-probe.json", "evidence/lighthouse-summary.json" ], "findingIds": [ "F014" ] }, { "principleId": "be-inclusive", "checkId": "legible-text", "status": "pass", "confidence": "high", "method": "Direct inspection/probe across the representative paths.", "evidence": "Body and heading copy is generally readable with clear section grouping on desktop and mobile.", "pathIds": [ "home" ], "artifacts": [ "evidence/home-desktop.png", "evidence/home-mobile.png" ] }, { "principleId": "be-inclusive", "checkId": "zoom-reflow-targets-and-media", "status": "issues", "confidence": "high", "method": "Direct visual/objective evidence gathered for the mapped check.", "evidence": "Search results overflow by 872px at 360px and Lighthouse failed target-size; the homepage also includes videos with no elements.", "pathIds": [ "home" ], "artifacts": [ "evidence/search-mobile-layout.json", "evidence/lighthouse-summary.json", "evidence/platform-a11y-probe.json" ], "findingIds": [ "F015" ] }, { "principleId": "follow-best-practices", "checkId": "no-console-errors", "status": "issues", "confidence": "high", "method": "Direct visual/objective evidence gathered for the mapped check.", "evidence": "Lighthouse failed errors-in-console; HAR recorded aborted fetches and a 400 autologin request.", "pathIds": [ "home" ], "artifacts": [ "evidence/lighthouse-summary.json", "evidence/home-summary.json" ], "findingIds": [ "F016" ] }, { "principleId": "follow-best-practices", "checkId": "sound-document-and-assets", "status": "issues", "confidence": "high", "method": "Direct visual/objective evidence gathered for the mapped check.", "evidence": "Lighthouse failed image-aspect-ratio and image-size-responsive; 100/100 inspected images omitted dimensions and 30 were oversized.", "pathIds": [ "home" ], "artifacts": [ "evidence/images.json", "evidence/lighthouse-summary.json" ], "findingIds": [ "F017" ] }, { "principleId": "follow-best-practices", "checkId": "browser-platform-hygiene", "status": "issues", "confidence": "high", "method": "Direct visual/objective evidence gathered for the mapped check.", "evidence": "Lighthouse reported one deprecation, invalid source maps, inspector issues and four BFCache failure reasons.", "pathIds": [ "home" ], "artifacts": [ "evidence/lighthouse-summary.json" ], "findingIds": [ "F018" ] }, { "principleId": "be-discoverable", "checkId": "title-and-description", "status": "pass", "confidence": "high", "method": "Direct inspection/probe across the representative paths.", "evidence": "Homepage and search results expose descriptive titles and meta descriptions.", "pathIds": [ "home", "search" ], "artifacts": [ "evidence/recon.json", "evidence/search-probe.json" ] }, { "principleId": "be-discoverable", "checkId": "crawlable-and-mobile-friendly", "status": "pass", "confidence": "high", "method": "Direct inspection/probe across the representative paths.", "evidence": "Real href links, viewport meta and permissive robots rules were directly observed.", "pathIds": [ "home", "search" ], "artifacts": [ "evidence/recon.json", "evidence/discovery.json" ] }, { "principleId": "be-discoverable", "checkId": "canonical-and-indexing-signals", "status": "pass", "confidence": "high", "method": "Direct inspection/probe across the representative paths.", "evidence": "Homepage/search canonical URLs, successful main fetch and declared robots sitemaps were observed with no accidental noindex.", "pathIds": [ "home", "search" ], "artifacts": [ "evidence/recon.json", "evidence/search-probe.json", "evidence/discovery.json" ] }, { "principleId": "be-discoverable", "checkId": "structured-and-shareable-metadata", "status": "pass", "confidence": "high", "method": "Direct inspection/probe across the representative paths.", "evidence": "Homepage exposes consistent Open Graph title, description, URL, image, locale and type for its visible portal identity.", "pathIds": [ "home", "search" ], "artifacts": [ "evidence/recon.json" ] }, { "principleId": "be-private-and-secure", "checkId": "secure-transport-and-headers", "status": "issues", "confidence": "high", "method": "Direct visual/objective evidence gathered for the mapped check.", "evidence": "Headers show CSP only frame-ancestors, with no script/style/default-src policy; X-Content-Type-Options, Referrer-Policy and Permissions-Policy are absent. HTTPS and HSTS are present.", "pathIds": [ "home" ], "artifacts": [ "evidence/headers.json" ], "findingIds": [ "F019" ] }, { "principleId": "be-private-and-secure", "checkId": "data-minimisation-and-third-parties", "status": "issues", "confidence": "high", "method": "Direct visual/objective evidence gathered for the mapped check.", "evidence": "Tracker capture saw 36 third-party origins including Google Tag Manager/Analytics; HAR attributed 452 requests and 16.45MB to non-main origins, before consent was resolved.", "pathIds": [ "home" ], "artifacts": [ "evidence/trackers.json", "evidence/home-summary.json" ], "findingIds": [ "F020" ] }, { "principleId": "be-private-and-secure", "checkId": "in-context-permissions-and-modern-auth", "status": "pass", "confidence": "high", "method": "Direct inspection/probe across the representative paths.", "evidence": "No permission prompt appeared on load; login markup includes WebAuthn and correctly tokenised username/current-password/OTP fields.", "pathIds": [ "home" ], "artifacts": [ "evidence/home-desktop.png", "evidence/login-probe.json" ] }, { "principleId": "be-private-and-secure", "checkId": "defensive-browser-policies", "status": "issues", "confidence": "high", "method": "Direct visual/objective evidence gathered for the mapped check.", "evidence": "All nine observed cookies were SameSite=None and several non-auth cookies were script-readable; Referrer-Policy and Permissions-Policy were absent.", "pathIds": [ "home" ], "artifacts": [ "evidence/cookies.json", "evidence/headers.json" ], "findingIds": [ "F021" ] }, { "principleId": "be-resilient", "checkId": "progressive-enhancement", "status": "pass", "confidence": "high", "method": "Direct inspection/probe across the representative paths.", "evidence": "Discoverability measured 92% rendered-word coverage in raw HTML and no empty JS shell.", "pathIds": [ "home" ], "artifacts": [ "evidence/discoverability.json", "evidence/discoverability-crawler.png" ] }, { "principleId": "be-resilient", "checkId": "resilient-runtime-behaviour", "status": "pass", "confidence": "high", "method": "Direct inspection/probe across the representative paths.", "evidence": "The consent/settings route provides a bilingual scripted failure fallback, and menus/forms remained within tested viewports.", "pathIds": [ "home" ], "artifacts": [ "evidence/settings-dom.json", "evidence/timetables-mobile-layout.json" ] }, { "principleId": "be-resilient", "checkId": "offline-and-installable", "status": "issues", "confidence": "high", "method": "Direct visual/objective evidence gathered for the mapped check.", "evidence": "The timetable has a web app manifest, but navigator.serviceWorker.controller was absent in the tested load and no offline fallback was exposed.", "pathIds": [ "timetables" ], "artifacts": [ "evidence/timetables-probe.json", "evidence/timetables.png" ], "findingIds": [ "F022" ] }, { "principleId": "be-resilient", "checkId": "network-and-http-failure-states", "status": "pass", "confidence": "high", "method": "Direct inspection/probe across the representative paths.", "evidence": "The tested 404 gives a useful explanation, return action and support 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 inspection/probe across the representative paths.", "evidence": "Homepage and timetable set html lang=cs; login offers 18 language choices and the tested layouts preserve reading order.", "pathIds": [ "home" ], "artifacts": [ "evidence/home-dom.json", "evidence/timetables-probe.json", "evidence/login-probe.json" ] }, { "principleId": "be-internationalised", "checkId": "locale-aware-data", "status": "pass", "confidence": "high", "method": "Direct inspection/probe across the representative paths.", "evidence": "Visible Czech dates, temperatures, prices and locale-specific copy are formatted for the active Czech locale.", "pathIds": [ "home" ], "artifacts": [ "evidence/home-mobile.png", "evidence/settings.png" ] }, { "principleId": "be-internationalised", "checkId": "time-zone-correctness", "status": "not-applicable", "confidence": "high", "method": "Applicability judgement from representative-route recon.", "evidence": "The representative public portal, search, timetable-start and settings states exposed no cross-time-zone event creation or DST-sensitive editing flow.", "reason": "The representative public portal, search, timetable-start and settings states exposed no cross-time-zone event creation or DST-sensitive editing flow.", "pathIds": [ "home" ] }, { "principleId": "be-trustworthy", "checkId": "no-dark-patterns", "status": "issues", "confidence": "high", "method": "Direct visual/objective evidence gathered for the mapped check.", "evidence": "The settings screen presents a dominant Agree button for tailored ads and a CZK 49/month alternative; the non-pay, non-targeted detailed choice is a lower-emphasis text link.", "pathIds": [ "settings" ], "artifacts": [ "evidence/settings.png" ], "findingIds": [ "F023" ] }, { "principleId": "be-trustworthy", "checkId": "humane-error-handling", "status": "issues", "confidence": "high", "method": "Direct visual/objective evidence gathered for the mapped check.", "evidence": "Before/after screenshots of the empty submit are effectively unchanged and the origin/destination inputs are not marked required in DOM.", "pathIds": [ "timetables" ], "artifacts": [ "evidence/timetables.png", "evidence/timetables-invalid.png", "evidence/timetables-probe.json" ], "findingIds": [ "F024" ] }, { "principleId": "be-trustworthy", "checkId": "trustworthy-input-assistance", "status": "issues", "confidence": "high", "method": "Direct visual/objective evidence gathered for the mapped check.", "evidence": "Homepage search and timetable origin/destination use autocomplete=off; timetable email/comment fields omit useful tokens, although login correctly uses username/current-password/one-time-code.", "pathIds": [ "home" ], "artifacts": [ "evidence/recon.json", "evidence/timetables-probe.json", "evidence/login-probe.json" ], "findingIds": [ "F025" ] }, { "principleId": "be-trustworthy", "checkId": "safe-commercial-and-account-flows", "status": "pass", "confidence": "high", "method": "Direct inspection/probe across the representative paths.", "evidence": "The login surface labels account creation, supplies username/password/OTP autocomplete and offers multiple federated identity methods including BankID/mojeID.", "pathIds": [ "home", "settings", "timetables", "login" ], "artifacts": [ "evidence/login.png", "evidence/login-probe.json" ] }, { "principleId": "be-sustainable", "checkId": "optimised-assets", "status": "issues", "confidence": "high", "method": "Direct visual/objective evidence gathered for the mapped check.", "evidence": "The homepage transferred 14.2MB across 315 image requests; 30/100 inspected images were oversized, 45 used legacy formats and 13 lacked srcset.", "pathIds": [ "home" ], "artifacts": [ "evidence/home-summary.json", "evidence/images.json" ], "findingIds": [ "F026" ] }, { "principleId": "be-sustainable", "checkId": "no-wasteful-work", "status": "issues", "confidence": "high", "method": "Direct visual/objective evidence gathered for the mapped check.", "evidence": "A fresh load issued 480 requests, 452 to non-main origins, with video metadata, assistant and analytics traffic plus repeated long tasks.", "pathIds": [ "home" ], "artifacts": [ "evidence/home-summary.json", "evidence/home-trace-summary.json" ], "findingIds": [ "F027" ] }, { "principleId": "be-sustainable", "checkId": "third-party-and-media-budget", "status": "issues", "confidence": "high", "method": "Direct visual/objective evidence gathered for the mapped check.", "evidence": "16.45MB of 16.72MB transferred came from non-main origins; scripts included assistant/analytics and the DOM contained three video players.", "pathIds": [ "home" ], "artifacts": [ "evidence/home-summary.json", "evidence/platform-a11y-probe.json" ], "findingIds": [ "F028" ] }, { "principleId": "be-agent-ready", "checkId": "structured-agent-capabilities", "status": "issues", "confidence": "high", "method": "Direct visual/objective evidence gathered for the mapped check.", "evidence": "Discoverability is strong (92% raw/rendered coverage), but no WebMCP or agentic-tool registration was found; Lighthouse agentic-browsing scored 45.", "pathIds": [ "home" ], "artifacts": [ "evidence/discoverability.json", "evidence/lighthouse-summary.json" ], "findingIds": [ "F029" ] }, { "principleId": "be-agent-ready", "checkId": "on-device-inference", "status": "not-applicable", "confidence": "high", "method": "Applicability judgement from representative-route recon.", "evidence": "No clearly beneficial private on-device summarisation or generation task was established in the tested public flows; emerging inference use is not an obligation by itself.", "reason": "No clearly beneficial private on-device summarisation or generation task was established in the tested public flows; emerging inference use is not an obligation by itself.", "pathIds": [ "home" ] }, { "principleId": "be-memory-efficient", "checkId": "no-leak-under-repeated-interaction", "status": "pass", "confidence": "high", "method": "Direct inspection/probe across the representative paths.", "evidence": "After ten hamburger open/close cycles, heap self size rose only 0.30% (90.90MB to 91.17MB) and nodes 0.21%, not unbounded growth.", "pathIds": [ "home" ], "artifacts": [ "evidence/heap-baseline.heapsnapshot", "evidence/heap-post.heapsnapshot" ] }, { "principleId": "be-memory-efficient", "checkId": "bounded-footprint", "status": "issues", "confidence": "high", "method": "Direct visual/objective evidence gathered for the mapped check.", "evidence": "The heap summary contained 1,532,409 nodes and 90.9MB self size at baseline (post interaction 1,535,702 nodes/91.2MB), including 162k closures post-interaction.", "pathIds": [ "home" ], "artifacts": [ "evidence/heap-baseline.heapsnapshot", "evidence/heap-post.heapsnapshot" ], "findingIds": [ "F030" ] }, { "principleId": "be-memory-efficient", "checkId": "no-detached-dom-or-unbounded-listeners", "status": "pass", "confidence": "high", "method": "Direct inspection/probe across the representative paths.", "evidence": "Post-interaction heap top constructors contained no Detached* population and aggregate growth stayed below 0.3%.", "pathIds": [ "home" ], "artifacts": [ "evidence/heap-baseline.heapsnapshot", "evidence/heap-post.heapsnapshot" ] } ], "principleOutcomes": [ { "principleId": "respect-user-preferences", "expectation": "default", "status": "issues", "findingIds": [ "F001" ] }, { "principleId": "implement-natural-interactions", "expectation": "default", "status": "issues", "findingIds": [ "F002" ] }, { "principleId": "provide-guided-navigation", "expectation": "default", "status": "pass" }, { "principleId": "maximize-content-reduce-noise", "expectation": "default", "status": "issues", "findingIds": [ "F003", "F004" ] }, { "principleId": "adapt-to-the-form-factor", "expectation": "default", "status": "issues", "findingIds": [ "F005", "F006" ] }, { "principleId": "support-core-task-success", "expectation": "default", "status": "pass" }, { "principleId": "be-fast-and-stable", "expectation": "default", "status": "issues", "findingIds": [ "F007", "F008", "F009", "F010", "F011" ] }, { "principleId": "be-inclusive", "expectation": "default", "status": "issues", "findingIds": [ "F012", "F013", "F014", "F015" ] }, { "principleId": "follow-best-practices", "expectation": "default", "status": "issues", "findingIds": [ "F016", "F017", "F018" ] }, { "principleId": "be-discoverable", "expectation": "default", "status": "pass" }, { "principleId": "be-private-and-secure", "expectation": "default", "status": "issues", "findingIds": [ "F019", "F020", "F021" ] }, { "principleId": "be-resilient", "expectation": "contextual", "status": "issues", "findingIds": [ "F022" ] }, { "principleId": "be-internationalised", "expectation": "contextual", "status": "pass" }, { "principleId": "be-trustworthy", "expectation": "default", "status": "issues", "findingIds": [ "F023", "F024", "F025" ] }, { "principleId": "be-sustainable", "expectation": "contextual", "status": "issues", "findingIds": [ "F026", "F027", "F028" ] }, { "principleId": "be-agent-ready", "expectation": "contextual", "status": "issues", "findingIds": [ "F029" ] }, { "principleId": "be-memory-efficient", "expectation": "default", "status": "issues", "findingIds": [ "F030" ] } ], "paths": [ { "id": "home", "description": "Homepage portal archetype and primary search entry; tested desktop, 360px, dark, reduced-motion, high-contrast, network, performance, accessibility and memory conditions.", "url": "https://www.seznam.cz", "conditions": [ "desktop", "viewport: 360x800", "prefers-color-scheme: dark", "prefers-reduced-motion: reduce", "prefers-contrast: more", "forced-colors: active", "keyboard focus", "cold load", "10x hamburger interaction" ], "result": "issues" }, { "id": "search", "description": "Primary search completion and result-list archetype.", "url": "https://search.seznam.cz/?q=modern%C3%AD+web", "conditions": [ "desktop", "viewport: 360x800" ], "result": "issues" }, { "id": "settings", "description": "Consent and personalisation choice flow.", "url": "https://www.seznam.cz/nastaveni", "conditions": [ "fresh signed-out profile" ], "result": "issues" }, { "id": "timetables", "description": "App-like route-planning form archetype including empty submission.", "url": "https://www.seznam.cz/jizdnirady/", "conditions": [ "desktop", "viewport: 360x800", "empty submit" ], "result": "issues" }, { "id": "login", "description": "Authentication entry inspected for labels, autocomplete and WebAuthn/passkey support.", "url": "https://login.szn.cz/", "conditions": [ "signed out" ], "result": "pass" }, { "id": "not-found", "description": "Invalid-route recovery state.", "url": "https://www.seznam.cz/this-route-does-not-exist-web-uplift", "conditions": [ "desktop" ], "result": "pass" } ], "findings": [ { "id": "F001", "severity": "medium", "confidence": "high", "summary": "The portal ignores the operating system dark theme.", "evidence": "Desktop screenshots under light and prefers-color-scheme: dark are pixel-identical in surface treatment; the rendered CSS declares color-scheme: light.", "suggestedFix": "Declare color-scheme: light dark and map surface/text tokens through prefers-color-scheme or light-dark(), including the consent layer.", "effort": "medium", "pathId": "home", "url": "https://www.seznam.cz", "principleId": "respect-user-preferences", "principleCheckId": "respects-color-scheme", "guidanceId": "dark-mode", "guidanceCategory": "user-experience", "artifacts": [ "evidence/home-desktop.png", "evidence/home-dark.png" ] }, { "id": "F002", "severity": "low", "confidence": "high", "summary": "Primary state changes do not use View Transitions.", "evidence": "The platform probe found no view-transition CSS while the portal has tab, menu and content state changes.", "suggestedFix": "Use document.startViewTransition() for meaningful same-document state changes, with a reduced-motion fallback.", "effort": "medium", "pathId": "home", "url": "https://www.seznam.cz", "principleId": "implement-natural-interactions", "principleCheckId": "view-transitions", "guidanceId": "same-document-transitions", "guidanceCategory": "user-experience", "artifacts": [ "evidence/platform-a11y-probe.json" ] }, { "id": "F003", "severity": "high", "confidence": "high", "summary": "The consent prompt obscures primary content on every fresh load.", "evidence": "Desktop and 360px screenshots show a fixed consent sheet covering the lower viewport before interaction; on mobile it hides the lead story.", "suggestedFix": "Replace the load-time obstruction with a compact, dismissible choice surface and keep the core portal usable while a decision is pending.", "effort": "medium", "pathId": "home", "url": "https://www.seznam.cz", "principleId": "maximize-content-reduce-noise", "principleCheckId": "no-intrusive-interruptions", "guidanceId": "light-dismiss-a-dialog", "guidanceCategory": "user-experience", "artifacts": [ "evidence/home-desktop.png", "evidence/home-mobile.png", "evidence/settings.png" ] }, { "id": "F004", "severity": "medium", "confidence": "high", "summary": "The consent surface is custom chrome without dialog semantics.", "evidence": "The homepage overlay was absent from dialog/[role=dialog]/aria-modal probes, while the settings DOM uses a custom .szn-cmp-dialog-container.", "suggestedFix": "Implement the modal choice with , a labelled heading, focus containment, Escape/cancel handling and an explicit close path.", "effort": "medium", "pathId": "home", "url": "https://www.seznam.cz", "principleId": "maximize-content-reduce-noise", "principleCheckId": "semantic-dismissible-primitives", "guidanceId": "declarative-dialog-popover-control", "guidanceCategory": "user-experience", "artifacts": [ "evidence/recon.json", "evidence/settings-dom.json", "evidence/settings.png" ] }, { "id": "F005", "severity": "high", "confidence": "high", "summary": "Search results force a desktop-width layout on mobile.", "evidence": "At 360x800 the search result layout reported scrollWidth 1232px, clientWidth 360px and 872px horizontal overflow.", "suggestedFix": "Make result containers intrinsically sized (max-inline-size:100%), reflow tabs/cards at narrow widths, and test at 320-400 CSS px.", "effort": "medium", "pathId": "search", "url": "https://search.seznam.cz/?q=modern%C3%AD+web", "principleId": "adapt-to-the-form-factor", "principleCheckId": "responsive-no-horizontal-scroll", "guidanceId": "fluid-scaling", "guidanceCategory": "user-experience", "artifacts": [ "evidence/search-mobile-layout.json", "evidence/search-results.png" ] }, { "id": "F006", "severity": "high", "confidence": "high", "summary": "Keyboard focus is invisible on many primary controls and targets are undersized.", "evidence": "The focus probe found none/0px outlines on search tabs, submit buttons and article links; many controls are 28-32px high. Lighthouse also failed target-size.", "suggestedFix": "Apply a high-contrast :focus-visible indicator and provide at least 44x44 CSS-pixel touch targets without removing native focus.", "effort": "medium", "pathId": "home", "url": "https://www.seznam.cz", "principleId": "adapt-to-the-form-factor", "principleCheckId": "input-modality-aware", "guidanceId": "accessibility", "guidanceCategory": "accessibility", "artifacts": [ "evidence/platform-a11y-probe.json", "evidence/lighthouse-summary.json" ] }, { "id": "F007", "severity": "high", "confidence": "high", "summary": "Cold-load performance is far outside the good range.", "evidence": "Lighthouse measured LCP 10.6s, FCP 8.6s, TBT 800ms and performance 33; the trace independently measured LCP 4.13s and TBT 302ms.", "suggestedFix": "Prioritise the LCP resource, defer below-fold portal modules, and split/schedule non-critical JavaScript.", "effort": "medium", "pathId": "home", "url": "https://www.seznam.cz", "principleId": "be-fast-and-stable", "principleCheckId": "good-core-web-vitals", "guidanceId": "performance", "guidanceCategory": "performance", "artifacts": [ "evidence/lighthouse-summary.json", "evidence/home-trace-summary.json", "evidence/home-trace.json" ] }, { "id": "F008", "severity": "medium", "confidence": "high", "summary": "Late content and unsized images shift the mobile page.", "evidence": "The 360px layout observer measured CLS 0.125 with a 0.096 shift around 6.9s; all 100 inspected images lacked width/height attributes.", "suggestedFix": "Reserve image/ad/widget space with width/height or aspect-ratio and stabilise late-loading modules.", "effort": "medium", "pathId": "home", "url": "https://www.seznam.cz", "principleId": "be-fast-and-stable", "principleCheckId": "visual-stability", "guidanceId": "visually-stable-font-fallbacks", "guidanceCategory": "user-experience", "artifacts": [ "evidence/home-mobile-layout.json", "evidence/images.json" ] }, { "id": "F009", "severity": "high", "confidence": "high", "summary": "Heavy scripting repeatedly blocks the main thread.", "evidence": "The trace recorded six long tasks (longest 163ms, TBT 302ms); mobile layout recorded tasks up to 206ms and Lighthouse TBT was 800ms.", "suggestedFix": "Break work into scheduler.yield()/postTask chunks, delay non-critical widgets, and move suitable processing off-thread.", "effort": "medium", "pathId": "home", "url": "https://www.seznam.cz", "principleId": "be-fast-and-stable", "principleCheckId": "efficient-main-thread", "guidanceId": "break-up-long-tasks", "guidanceCategory": "performance", "artifacts": [ "evidence/home-trace-summary.json", "evidence/home-mobile-layout.json", "evidence/lighthouse-summary.json" ] }, { "id": "F010", "severity": "high", "confidence": "high", "summary": "Resource delivery is excessively heavy and redirect-rich.", "evidence": "HAR captured 480 requests and 16.7MB transferred, including 315 images/14.2MB and six redirects; many preview images lacked cache headers.", "suggestedFix": "Remove redirect loops, lazy-load below-fold modules, use responsive image variants and durable cache headers, and audit LCP priority.", "effort": "medium", "pathId": "home", "url": "https://www.seznam.cz", "principleId": "be-fast-and-stable", "principleCheckId": "efficient-resource-delivery", "guidanceId": "optimize-image-priority", "guidanceCategory": "performance", "artifacts": [ "evidence/home-summary.json", "evidence/home.har" ] }, { "id": "F011", "severity": "high", "confidence": "high", "summary": "Non-critical and third-party code dominates initial load.", "evidence": "HAR recorded 452 third-party-origin requests and a 644KB client bundle plus 406KB assistant widget and 153KB tag manager; Lighthouse reported TTI 65.6s.", "suggestedFix": "Code-split portal widgets, conditionally import the assistant and analytics, and remove duplicated/unused client code.", "effort": "medium", "pathId": "home", "url": "https://www.seznam.cz", "principleId": "be-fast-and-stable", "principleCheckId": "trim-unused-and-duplicate-code", "guidanceId": "identify-heavy-scripts", "guidanceCategory": "performance", "artifacts": [ "evidence/home-summary.json", "evidence/lighthouse-summary.json" ] }, { "id": "F012", "severity": "high", "confidence": "high", "summary": "Many images and controls lack accessible names.", "evidence": "Lighthouse failed button-name, image-alt, link-name and frame-title; the image probe counted 61/100 images without alt, and DOM probes found unnamed buttons/links.", "suggestedFix": "Give every actionable control and iframe an accessible name; use meaningful alt text or alt=\"\" for decorative images.", "effort": "medium", "pathId": "home", "url": "https://www.seznam.cz", "principleId": "be-inclusive", "principleCheckId": "names-roles-labels", "guidanceId": "accessibility", "guidanceCategory": "accessibility", "artifacts": [ "evidence/lighthouse-summary.json", "evidence/images.json", "evidence/platform-a11y-probe.json" ] }, { "id": "F013", "severity": "high", "confidence": "high", "summary": "Text and essential UI fail minimum colour contrast.", "evidence": "Lighthouse accessibility scored 70 and failed the color-contrast audit on the rendered homepage.", "suggestedFix": "Adjust text, icon and state tokens to WCAG AA ratios in every theme and verify normal, high-contrast and forced-colors modes.", "effort": "medium", "pathId": "home", "url": "https://www.seznam.cz", "principleId": "be-inclusive", "principleCheckId": "sufficient-contrast", "guidanceId": "accessibility", "guidanceCategory": "accessibility", "artifacts": [ "evidence/lighthouse-summary.json", "evidence/home-high-contrast.png" ] }, { "id": "F014", "severity": "high", "confidence": "high", "summary": "Heading structure and focus treatment do not provide a reliable reading/keyboard path.", "evidence": "Lighthouse failed heading-order; the DOM begins with empty H1s then H6 before H2, and the focus probe found invisible focus on most tested links/buttons.", "suggestedFix": "Use one descriptive H1, sequential section headings, labelled landmarks and a consistent visible focus ring.", "effort": "medium", "pathId": "home", "url": "https://www.seznam.cz", "principleId": "be-inclusive", "principleCheckId": "structure-and-focus", "guidanceId": "accessibility", "guidanceCategory": "accessibility", "artifacts": [ "evidence/platform-a11y-probe.json", "evidence/lighthouse-summary.json" ] }, { "id": "F015", "severity": "medium", "confidence": "high", "summary": "Reflow and target-size support fail on a primary path.", "evidence": "Search results overflow by 872px at 360px and Lighthouse failed target-size; the homepage also includes videos with no elements.", "suggestedFix": "Fix narrow-screen reflow, enlarge targets, and provide captions/transcripts for editorial media that conveys information.", "effort": "medium", "pathId": "home", "url": "https://www.seznam.cz", "principleId": "be-inclusive", "principleCheckId": "zoom-reflow-targets-and-media", "guidanceId": "fluid-scaling", "guidanceCategory": "user-experience", "artifacts": [ "evidence/search-mobile-layout.json", "evidence/lighthouse-summary.json", "evidence/platform-a11y-probe.json" ] }, { "id": "F016", "severity": "medium", "confidence": "high", "summary": "The homepage emits runtime/network errors.", "evidence": "Lighthouse failed errors-in-console; HAR recorded aborted fetches and a 400 autologin request.", "suggestedFix": "Remove avoidable failed requests, handle expected aborts without console errors, and add regression monitoring for uncaught/runtime failures.", "effort": "medium", "pathId": "home", "url": "https://www.seznam.cz", "principleId": "follow-best-practices", "principleCheckId": "no-console-errors", "guidanceId": "html", "guidanceCategory": "html", "artifacts": [ "evidence/lighthouse-summary.json", "evidence/home-summary.json" ] }, { "id": "F017", "severity": "medium", "confidence": "high", "summary": "Image sizing and aspect-ratio hygiene is poor.", "evidence": "Lighthouse failed image-aspect-ratio and image-size-responsive; 100/100 inspected images omitted dimensions and 30 were oversized.", "suggestedFix": "Emit intrinsic width/height, correct aspect ratios and srcset/sizes for each image slot.", "effort": "medium", "pathId": "home", "url": "https://www.seznam.cz", "principleId": "follow-best-practices", "principleCheckId": "sound-document-and-assets", "guidanceId": "html", "guidanceCategory": "html", "artifacts": [ "evidence/images.json", "evidence/lighthouse-summary.json" ] }, { "id": "F018", "severity": "medium", "confidence": "high", "summary": "Deprecated APIs, source-map defects and BFCache blockers remain.", "evidence": "Lighthouse reported one deprecation, invalid source maps, inspector issues and four BFCache failure reasons.", "suggestedFix": "Resolve deprecations and inspector issues, publish valid source maps, and remove unload/runtime patterns that block BFCache.", "effort": "medium", "pathId": "home", "url": "https://www.seznam.cz", "principleId": "follow-best-practices", "principleCheckId": "browser-platform-hygiene", "guidanceId": "html", "guidanceCategory": "html", "artifacts": [ "evidence/lighthouse-summary.json" ] }, { "id": "F019", "severity": "high", "confidence": "high", "summary": "The CSP is only a frame policy and key response defenses are missing.", "evidence": "Headers show CSP only frame-ancestors, with no script/style/default-src policy; X-Content-Type-Options, Referrer-Policy and Permissions-Policy are absent. HTTPS and HSTS are present.", "suggestedFix": "Deploy a nonce/hash-based CSP with default/script/style/object/base directives plus nosniff, strict Referrer-Policy and a least-privilege Permissions-Policy.", "effort": "medium", "pathId": "home", "url": "https://www.seznam.cz", "principleId": "be-private-and-secure", "principleCheckId": "secure-transport-and-headers", "guidanceId": "security", "guidanceCategory": "security", "artifacts": [ "evidence/headers.json" ] }, { "id": "F020", "severity": "high", "confidence": "high", "summary": "The fresh homepage has a very large analytics and third-party footprint.", "evidence": "Tracker capture saw 36 third-party origins including Google Tag Manager/Analytics; HAR attributed 452 requests and 16.45MB to non-main origins, before consent was resolved.", "suggestedFix": "Default to no non-essential collection, consolidate/batch analytics after consent, and remove or defer third-party widgets.", "effort": "medium", "pathId": "home", "url": "https://www.seznam.cz", "principleId": "be-private-and-secure", "principleCheckId": "data-minimisation-and-third-parties", "guidanceId": "privacy", "guidanceCategory": "privacy", "artifacts": [ "evidence/trackers.json", "evidence/home-summary.json" ] }, { "id": "F021", "severity": "medium", "confidence": "high", "summary": "Cookie and browser-policy posture is overly permissive.", "evidence": "All nine observed cookies were SameSite=None and several non-auth cookies were script-readable; Referrer-Policy and Permissions-Policy were absent.", "suggestedFix": "Use Lax/Strict unless cross-site behavior is required, add HttpOnly where JavaScript access is unnecessary, and set explicit browser policies.", "effort": "medium", "pathId": "home", "url": "https://www.seznam.cz", "principleId": "be-private-and-secure", "principleCheckId": "defensive-browser-policies", "guidanceId": "security", "guidanceCategory": "security", "artifacts": [ "evidence/cookies.json", "evidence/headers.json" ] }, { "id": "F022", "severity": "medium", "confidence": "medium", "summary": "The app-like timetable surface exposes a manifest but no demonstrated offline fallback.", "evidence": "The timetable has a web app manifest, but navigator.serviceWorker.controller was absent in the tested load and no offline fallback was exposed.", "suggestedFix": "Register a service worker for the timetable app shell and useful offline/retry state, while keeping server-rendered fallback content.", "effort": "medium", "pathId": "timetables", "url": "https://www.seznam.cz/jizdnirady/", "principleId": "be-resilient", "principleCheckId": "offline-and-installable", "guidanceId": "detect-initial-visibility-state", "guidanceCategory": "performance", "artifacts": [ "evidence/timetables-probe.json", "evidence/timetables.png" ] }, { "id": "F023", "severity": "high", "confidence": "high", "summary": "The consent choice strongly steers users toward tracking or payment.", "evidence": "The settings screen presents a dominant Agree button for tailored ads and a CZK 49/month alternative; the non-pay, non-targeted detailed choice is a lower-emphasis text link.", "suggestedFix": "Offer equally prominent accept, reject/non-targeted and customise choices, with neutral wording and no financial penalty framing for privacy.", "effort": "medium", "pathId": "settings", "url": "https://www.seznam.cz/nastaveni", "principleId": "be-trustworthy", "principleCheckId": "no-dark-patterns", "guidanceId": "custom-button-actions", "guidanceCategory": "user-experience", "artifacts": [ "evidence/settings.png" ] }, { "id": "F024", "severity": "medium", "confidence": "high", "summary": "Submitting the empty timetable form gives no visible field-specific guidance.", "evidence": "Before/after screenshots of the empty submit are effectively unchanged and the origin/destination inputs are not marked required in DOM.", "suggestedFix": "Declare required fields, validate after interaction, focus the first invalid field and announce concise recovery text with aria-describedby/live regions.", "effort": "small", "pathId": "timetables", "url": "https://www.seznam.cz/jizdnirady/", "principleId": "be-trustworthy", "principleCheckId": "humane-error-handling", "guidanceId": "required-field-feedback", "guidanceCategory": "forms", "artifacts": [ "evidence/timetables.png", "evidence/timetables-invalid.png", "evidence/timetables-probe.json" ] }, { "id": "F025", "severity": "medium", "confidence": "high", "summary": "Several meaningful inputs disable or omit autofill assistance.", "evidence": "Homepage search and timetable origin/destination use autocomplete=off; timetable email/comment fields omit useful tokens, although login correctly uses username/current-password/one-time-code.", "suggestedFix": "Keep correct login tokens and add suitable address/email tokens where standard tokens apply; avoid autocomplete=off unless necessary.", "effort": "medium", "pathId": "home", "url": "https://www.seznam.cz", "principleId": "be-trustworthy", "principleCheckId": "trustworthy-input-assistance", "guidanceId": "autofill-address-form", "guidanceCategory": "forms", "artifacts": [ "evidence/recon.json", "evidence/timetables-probe.json", "evidence/login-probe.json" ] }, { "id": "F026", "severity": "high", "confidence": "high", "summary": "Image delivery is disproportionate and poorly responsive.", "evidence": "The homepage transferred 14.2MB across 315 image requests; 30/100 inspected images were oversized, 45 used legacy formats and 13 lacked srcset.", "suggestedFix": "Generate AVIF/WebP responsive variants, emit srcset/sizes and lazy-load below-fold images while reserving dimensions.", "effort": "medium", "pathId": "home", "url": "https://www.seznam.cz", "principleId": "be-sustainable", "principleCheckId": "optimised-assets", "guidanceId": "deliver-optimized-decorative-images", "guidanceCategory": "user-experience", "artifacts": [ "evidence/home-summary.json", "evidence/images.json" ] }, { "id": "F027", "severity": "high", "confidence": "high", "summary": "The page performs extensive background work before user demand.", "evidence": "A fresh load issued 480 requests, 452 to non-main origins, with video metadata, assistant and analytics traffic plus repeated long tasks.", "suggestedFix": "Gate widgets/media on visibility or intent, deprioritise background fetches and stop idle/background work.", "effort": "medium", "pathId": "home", "url": "https://www.seznam.cz", "principleId": "be-sustainable", "principleCheckId": "no-wasteful-work", "guidanceId": "deprioritize-background-fetches", "guidanceCategory": "performance", "artifacts": [ "evidence/home-summary.json", "evidence/home-trace-summary.json" ] }, { "id": "F028", "severity": "high", "confidence": "high", "summary": "Third-party and media cost is not proportionate to the first-view portal task.", "evidence": "16.45MB of 16.72MB transferred came from non-main origins; scripts included assistant/analytics and the DOM contained three video players.", "suggestedFix": "Set per-template byte/request budgets, defer embeds and media, and load analytics/widgets only when justified by consent and user value.", "effort": "medium", "pathId": "home", "url": "https://www.seznam.cz", "principleId": "be-sustainable", "principleCheckId": "third-party-and-media-budget", "guidanceId": "efficient-background-processing", "guidanceCategory": "performance", "artifacts": [ "evidence/home-summary.json", "evidence/platform-a11y-probe.json" ] }, { "id": "F029", "severity": "low", "confidence": "high", "summary": "The search portal has no structured agent-facing capability surface.", "evidence": "Discoverability is strong (92% raw/rendered coverage), but no WebMCP or agentic-tool registration was found; Lighthouse agentic-browsing scored 45.", "suggestedFix": "For the search/timetable tasks, expose narrow, permissioned WebMCP tools with explicit parameters and safe confirmation boundaries.", "effort": "medium", "pathId": "home", "url": "https://www.seznam.cz", "principleId": "be-agent-ready", "principleCheckId": "structured-agent-capabilities", "guidanceId": "webmcp", "guidanceCategory": "webmcp", "artifacts": [ "evidence/discoverability.json", "evidence/lighthouse-summary.json" ] }, { "id": "F030", "severity": "medium", "confidence": "high", "summary": "The initial memory footprint is high for a portal landing page.", "evidence": "The heap summary contained 1,532,409 nodes and 90.9MB self size at baseline (post interaction 1,535,702 nodes/91.2MB), including 162k closures post-interaction.", "suggestedFix": "Virtualise/defer below-fold portal modules, release hidden widget state, and budget DOM/closure counts per module.", "effort": "medium", "pathId": "home", "url": "https://www.seznam.cz", "principleId": "be-memory-efficient", "principleCheckId": "bounded-footprint", "guidanceId": "defer-rendering-heavy-content", "guidanceCategory": "performance", "artifacts": [ "evidence/heap-baseline.heapsnapshot", "evidence/heap-post.heapsnapshot" ] } ], "taskList": [ { "id": "T001", "title": "Cut the homepage request/image/widget budget and main-thread work", "priority": 1, "findingIds": [ "F007", "F009", "F010", "F011", "F026", "F027", "F028" ], "guidanceId": "performance", "status": "open" }, { "id": "T002", "title": "Repair accessible names, heading order, focus and target sizes", "priority": 2, "findingIds": [ "F006", "F012", "F013", "F014", "F015" ], "guidanceId": "accessibility", "status": "open" }, { "id": "T003", "title": "Make search results genuinely reflow at mobile widths", "priority": 3, "findingIds": [ "F005", "F015" ], "guidanceId": "fluid-scaling", "status": "open" }, { "id": "T004", "title": "Replace the obstructive, steered consent experience with a semantic neutral choice", "priority": 4, "findingIds": [ "F003", "F004", "F023" ], "guidanceId": "declarative-dialog-popover-control", "status": "open" }, { "id": "T005", "title": "Deploy a complete CSP and browser security/privacy policies", "priority": 5, "findingIds": [ "F019", "F021" ], "guidanceId": "security", "status": "open" }, { "id": "T006", "title": "Minimise analytics and third-party collection until valid consent", "priority": 6, "findingIds": [ "F020", "F027", "F028" ], "guidanceId": "privacy", "status": "open" }, { "id": "T007", "title": "Reserve image/widget space and emit responsive intrinsic image metadata", "priority": 7, "findingIds": [ "F008", "F017", "F026" ], "guidanceId": "optimize-image-priority", "status": "open" }, { "id": "T008", "title": "Add system-driven dark mode", "priority": 8, "findingIds": [ "F001" ], "guidanceId": "dark-mode", "status": "open" }, { "id": "T009", "title": "Fix runtime errors, deprecated APIs, source maps and BFCache blockers", "priority": 9, "findingIds": [ "F016", "F018" ], "guidanceId": "html", "status": "open" }, { "id": "T010", "title": "Add explicit timetable validation and offline fallback", "priority": 10, "findingIds": [ "F022", "F024", "F025" ], "guidanceId": "required-field-feedback", "status": "open" }, { "id": "T011", "title": "Reduce initial DOM, closure and heap footprint", "priority": 11, "findingIds": [ "F030" ], "guidanceId": "defer-rendering-heavy-content", "status": "open" }, { "id": "T012", "title": "Expose narrow, permissioned agent tools for search and timetable tasks", "priority": 12, "findingIds": [ "F029" ], "guidanceId": "webmcp", "status": "open" }, { "id": "T013", "title": "Use View Transitions for meaningful portal state changes", "priority": 13, "findingIds": [ "F002" ], "guidanceId": "same-document-transitions", "status": "open" } ], "budget": { "pathCount": 6, "auditPasses": 1 }, "agent": "pi", "runId": "2026-07-20T06-46-15-547Z" }