auditmysite 1.0.0

//! Regelregister — zentrale Definition aller Audit-Regeln über alle Dimensionen
//!
//! Jede Regel im System hat eine eindeutige ID, gehört zu einer Dimension
//! und Subkategorie, hat Issue-Klasse, Severity, Score-Impact und
//! Report-Sichtbarkeitseinstellungen.

use super::{
    dimensions::{Dimension, Subcategory},
    issue_class::IssueClass,
    score::{Scaling, ScoreImpact},
    severity::Severity,
};

/// Standard-Regelobjekt
pub struct Rule {
    /// Eindeutige Regel-ID (z.B. "a11y.alt_text.missing")
    pub id: &'static str,
    /// Audit-Dimension
    pub dimension: Dimension,
    /// Subkategorie innerhalb der Dimension
    pub subcategory: Subcategory,
    /// Issue-Klasse (Missing/Invalid/Weak/Risk/Opportunity/Informational)
    pub issue_class: IssueClass,
    /// Schweregrad
    pub severity: Severity,
    /// Externe Referenz (z.B. "WCAG 1.1.1", "CWV:LCP")
    pub external_ref: Option<&'static str>,
    /// Externes Level (z.B. "A", "AA", "AAA")
    pub external_level: Option<&'static str>,
    /// Primary axe-core rule ID, if applicable
    pub axe_id: Option<&'static str>,
    /// Kurztitel (Deutsch)
    pub title: &'static str,
    /// Kurztitel (kanonisch Englisch — für JSON)
    pub title_en: &'static str,
    /// Beschreibung des Problems
    pub description: &'static str,
    /// Auswirkung auf den Nutzer (Deutsch)
    pub user_impact: &'static str,
    /// Auswirkung auf den Nutzer (kanonisch Englisch — für JSON)
    pub user_impact_en: &'static str,
    /// Technische Auswirkung (Deutsch)
    pub technical_impact: &'static str,
    /// Technische Auswirkung (kanonisch Englisch — für JSON)
    pub technical_impact_en: &'static str,
    /// Score-Abzug-Modell
    pub score_impact: ScoreImpact,
    /// Sichtbarkeit in den verschiedenen Report-Ebenen
    pub report_visibility: ReportVisibility,
}

/// Welche Report-Ebenen zeigen diese Regel
pub struct ReportVisibility {
    pub executive: bool,
    pub standard: bool,
    pub technical: bool,
}

const VIS_ALL: ReportVisibility = ReportVisibility {
    executive: true,
    standard: true,
    technical: true,
};

const VIS_STANDARD: ReportVisibility = ReportVisibility {
    executive: false,
    standard: true,
    technical: true,
};

const VIS_TECHNICAL: ReportVisibility = ReportVisibility {
    executive: false,
    standard: false,
    technical: true,
};

/// Lookup-Trait für Regelregister
pub struct RuleLookup;

impl RuleLookup {
    /// Regel nach ID suchen
    pub fn by_id(id: &str) -> Option<&'static Rule> {
        RULES.iter().find(|r| r.id == id)
    }

    /// Regel nach externer WCAG-Referenz suchen (z.B. "1.1.1")
    pub fn by_wcag(criterion: &str) -> Option<&'static Rule> {
        let search = format!("WCAG {}", criterion);
        RULES
            .iter()
            .find(|r| r.external_ref == Some(search.as_str()))
    }

    /// Regel nach Legacy-WCAG-ID suchen (z.B. "1.1.1")
    pub fn by_legacy_wcag_id(wcag_id: &str) -> Option<&'static Rule> {
        LEGACY_WCAG_MAP
            .iter()
            .find(|(wid, _)| *wid == wcag_id)
            .and_then(|(_, rule_id)| Self::by_id(rule_id))
    }

    /// Alle Regeln einer Dimension
    pub fn by_dimension(dim: Dimension) -> Vec<&'static Rule> {
        RULES.iter().filter(|r| r.dimension == dim).collect()
    }
}

/// Mapping von alter WCAG-ID zu neuer Regel-ID
static LEGACY_WCAG_MAP: &[(&str, &str)] = &[
    ("1.1.1", "a11y.alt_text.missing"),
    ("1.2.1", "a11y.media.alternative"),
    ("1.2.2", "a11y.captions.missing"),
    ("1.2.8", "a11y.media_alternative.missing"),
    ("1.3.1", "a11y.structure.missing"),
    ("1.3.4", "a11y.orientation.restricted"),
    ("1.3.6", "a11y.identify_purpose.missing"),
    ("1.3.5", "a11y.input_purpose.missing"),
    ("1.4.1", "a11y.color.link_indicator"),
    ("1.4.3", "a11y.contrast.weak"),
    ("1.4.4", "a11y.resize_text.weak"),
    ("1.4.7", "a11y.background_audio.uncontrolled"),
    ("1.4.8", "a11y.visual_presentation.weak"),
    ("1.4.10", "a11y.reflow.missing"),
    ("1.4.11", "a11y.non_text_contrast.weak"),
    ("1.4.13", "a11y.hover.content_visibility"),
    ("2.1.1", "a11y.keyboard.missing"),
    ("2.1.2", "a11y.keyboard_trap.risk"),
    ("2.2.1", "a11y.timing.unadjustable"),
    ("2.2.3", "a11y.timing.essential"),
    ("2.2.4", "a11y.interruptions.uncontrollable"),
    ("2.2.5", "a11y.re_authenticate.data_loss"),
    ("2.2.6", "a11y.timeouts.unwarned"),
    ("2.4.1", "a11y.bypass_blocks.missing"),
    ("2.4.2", "a11y.page_title.missing"),
    ("2.4.3", "a11y.focus_order.weak"),
    ("2.4.4", "a11y.link_purpose.weak"),
    ("2.4.6", "a11y.headings.missing"),
    ("2.4.7", "a11y.focus_visible.missing"),
    ("2.4.8", "a11y.location.missing"),
    ("2.4.9", "a11y.link_purpose_only.weak"),
    ("2.3.3", "a11y.motion.reduced_motion"),
    ("2.4.10", "a11y.section_headings.missing"),
    ("2.5.1", "a11y.pointer_gestures.missing_alternative"),
    ("2.5.2", "a11y.pointer_cancellation.invalid"),
    ("2.5.3", "a11y.label_in_name.invalid"),
    ("2.5.4", "a11y.motion_actuation.missing_alternative"),
    ("2.5.5", "a11y.target_size_enhanced.small"),
    ("3.1.1", "a11y.language.missing"),
    ("3.1.3", "a11y.unusual_words.missing_definition"),
    ("3.1.4", "a11y.abbreviations.missing"),
    ("3.2.1", "a11y.on_focus.risk"),
    ("3.2.2", "a11y.on_input.risk"),
    ("3.3.1", "a11y.error_id.missing_description"),
    ("3.3.2", "a11y.form_labels.missing"),
    ("3.3.5", "a11y.help.missing"),
    ("4.1.1", "a11y.parsing.invalid"),
    ("4.1.2", "a11y.name_role.missing"),
    ("4.1.3", "a11y.status_messages.broken"),
    ("aria-hidden-focus", "a11y.aria_hidden_focus.invalid"),
    ("aria-required-attr", "a11y.aria_required_attr.missing"),
    ("aria-prohibited-attr", "a11y.aria_prohibited_attr.invalid"),
    ("frame-tested", "a11y.frame_tested.cross_origin"),
    ("frame-title", "a11y.frame_title.missing"),
    ("form-no-submit", "a11y.form_no_submit.missing"),
    ("landmark-main-present", "a11y.landmark_main.missing"),
    ("landmark-unique", "a11y.landmark_unique.invalid"),
    ("modern-attribute-misuse", "a11y.modern_attributes.invalid"),
    (
        "presentation-semantic-children",
        "a11y.presentation_semantic_children.invalid",
    ),
];

/// Alle Regeln im System
pub static RULES: &[Rule] = &[
    // ═══════════════════════════════════════════════════════════════════════════
    // ACCESSIBILITY
    // ═══════════════════════════════════════════════════════════════════════════

    // ── Inhalte & Alternativen ──────────────────────────────────────────────
    Rule {
        id: "a11y.alt_text.missing",
        dimension: Dimension::Accessibility,
        subcategory: Subcategory::ContentAlternatives,
        issue_class: IssueClass::Missing,
        severity: Severity::High,
        external_ref: Some("WCAG 1.1.1"),
        external_level: Some("A"),
        axe_id: Some("image-alt"),
        title: "Fehlende Alternativtexte bei Bildern",
        title_en: "Missing alternative text on images",
        description: "Bilder haben keinen beschreibenden Alternativtext.",
        user_impact: "Screenreader-Nutzer erhalten keine Bildinformation.",
        user_impact_en: "Screen reader users receive no image information.",
        technical_impact: "Nicht-konforme Bildauszeichnung im Markup.",
        technical_impact_en: "Non-conformant image markup.",
        score_impact: ScoreImpact {
            base_penalty: 3.0,
            max_penalty: 10.0,
            occurrence_scaling: Scaling::Logarithmic,
        },
        report_visibility: VIS_ALL,
    },
    Rule {
        id: "a11y.media.alternative",
        dimension: Dimension::Accessibility,
        subcategory: Subcategory::ContentAlternatives,
        issue_class: IssueClass::Missing,
        severity: Severity::Medium,
        external_ref: Some("WCAG 1.2.1"),
        external_level: Some("A"),
        axe_id: Some("video-caption"),
        title: "Fehlende Alternativen für reine Audio- oder Videoinhalte",
        title_en: "Missing alternatives for audio-only or video-only content",
        description: "Reine Audio- oder Videoinhalte haben keine alternative Textdarstellung oder Tonspur.",
        user_impact: "Menschen mit Seh- oder Hörbehinderung können den Inhalt der Medien nicht erfassen.",
        user_impact_en: "People with visual or hearing impairments cannot access the media content.",
        technical_impact: "Fehlende alternative Medienbeschreibung.",
        technical_impact_en: "Missing alternative media description.",
        score_impact: ScoreImpact {
            base_penalty: 2.0,
            max_penalty: 5.0,
            occurrence_scaling: Scaling::Logarithmic,
        },
        report_visibility: VIS_STANDARD,
    },
    Rule {
        id: "a11y.captions.missing",
        dimension: Dimension::Accessibility,
        subcategory: Subcategory::ContentAlternatives,
        issue_class: IssueClass::Missing,
        severity: Severity::High,
        external_ref: Some("WCAG 1.2.2"),
        external_level: Some("A"),
        axe_id: Some("video-caption"),
        title: "Fehlende Untertitel für Videos",
        title_en: "Missing captions for videos",
        description: "Für aufgezeichnete Videoinhalte sind keine Untertitel vorhanden.",
        user_impact: "Gehörlose oder schwerhörige Nutzer können gesprochene Inhalte nicht wahrnehmen.",
        user_impact_en: "Deaf or hard-of-hearing users cannot perceive spoken content.",
        technical_impact: "Fehlendes track-Element für Untertitel.",
        technical_impact_en: "Missing track element for captions.",
        score_impact: ScoreImpact {
            base_penalty: 3.0,
            max_penalty: 10.0,
            occurrence_scaling: Scaling::Logarithmic,
        },
        report_visibility: VIS_ALL,
    },
    Rule {
        id: "a11y.media_alternative.missing",
        dimension: Dimension::Accessibility,
        subcategory: Subcategory::ContentAlternatives,
        issue_class: IssueClass::Missing,
        severity: Severity::Medium,
        external_ref: Some("WCAG 1.2.8"),
        external_level: Some("AAA"),
        axe_id: Some("media-alt"),
        title: "Fehlende Medienalternative (AAA)",
        title_en: "Missing media alternative (AAA)",
        description: "Für aufgezeichnete Videos oder Audios ist keine vollständige Medienalternative vorhanden.",
        user_impact: "Nutzer, die keine Videos oder Audios abspielen können, erhalten keine Textalternative.",
        user_impact_en: "Users who cannot play video or audio receive no text alternative.",
        technical_impact: "Fehlendes Transkript oder Audiobeschreibung.",
        technical_impact_en: "Missing transcript or audio description.",
        score_impact: ScoreImpact {
            base_penalty: 0.5,
            max_penalty: 1.5,
            occurrence_scaling: Scaling::Logarithmic,
        },
        report_visibility: VIS_STANDARD,
    },
    // ── Struktur & Semantik ─────────────────────────────────────────────────
    Rule {
        id: "a11y.structure.missing",
        dimension: Dimension::Accessibility,
        subcategory: Subcategory::StructureSemantics,
        issue_class: IssueClass::Missing,
        severity: Severity::High,
        external_ref: Some("WCAG 1.3.1"),
        external_level: Some("A"),
        axe_id: None,
        title: "Fehlende semantische Struktur",
        title_en: "Missing semantic structure",
        description: "Struktur ist visuell, aber nicht im HTML-Code hinterlegt.",
        user_impact: "Screenreader können Beziehungen zwischen Inhalten nicht erkennen.",
        user_impact_en: "Screen readers cannot detect relationships between content elements.",
        technical_impact: "Fehlende HTML5-Semantik und ARIA-Rollen.",
        technical_impact_en: "Missing HTML5 semantics and ARIA roles.",
        score_impact: ScoreImpact {
            base_penalty: 2.5,
            max_penalty: 8.0,
            occurrence_scaling: Scaling::Logarithmic,
        },
        report_visibility: VIS_ALL,
    },
    Rule {
        id: "a11y.presentation_semantic_children.invalid",
        dimension: Dimension::Accessibility,
        subcategory: Subcategory::StructureSemantics,
        issue_class: IssueClass::Invalid,
        severity: Severity::Medium,
        external_ref: Some("WCAG 1.3.1"),
        external_level: Some("A"),
        axe_id: Some("presentation-semantic-children"),
        title: "Semantische Kinder in presentational Container",
        title_en: "Semantic children inside presentational container",
        description: "Ein Element mit role=\"presentation\" oder role=\"none\" enthält semantische Nachfahren.",
        user_impact: "Screenreader können relevante Struktur oder Bedienobjekte verlieren.",
        user_impact_en: "Screen readers may lose relevant structure or interactive controls.",
        technical_impact: "role=\"presentation\"/\"none\" verdeckt semantische Kindelemente.",
        technical_impact_en: "role=\"presentation\"/\"none\" hides semantic child elements.",
        score_impact: ScoreImpact {
            base_penalty: 1.5,
            max_penalty: 4.0,
            occurrence_scaling: Scaling::Logarithmic,
        },
        report_visibility: VIS_STANDARD,
    },
    Rule {
        id: "a11y.headings.missing",
        dimension: Dimension::Accessibility,
        subcategory: Subcategory::StructureSemantics,
        issue_class: IssueClass::Missing,
        severity: Severity::High,
        external_ref: Some("WCAG 2.4.6"),
        external_level: Some("AA"),
        axe_id: Some("heading-order"),
        title: "Fehlende oder unzureichende Überschriftenstruktur",
        title_en: "Missing or insufficient heading structure",
        description: "Keine oder unlogische Überschriftenhierarchie.",
        user_impact: "Screenreader-Navigation per Überschrift nicht möglich.",
        user_impact_en: "Heading-based screen reader navigation is not possible.",
        technical_impact: "Fehlende Heading-Hierarchie im DOM.",
        technical_impact_en: "Missing heading hierarchy in the DOM.",
        score_impact: ScoreImpact {
            base_penalty: 20.0,
            max_penalty: 20.0,
            occurrence_scaling: Scaling::Fixed,
        },
        report_visibility: VIS_ALL,
    },
    Rule {
        id: "a11y.section_headings.missing",
        dimension: Dimension::Accessibility,
        subcategory: Subcategory::StructureSemantics,
        issue_class: IssueClass::Missing,
        severity: Severity::Low,
        external_ref: Some("WCAG 2.4.10"),
        external_level: Some("AAA"),
        axe_id: Some("heading-order"),
        title: "Fehlende Abschnittsüberschriften",
        title_en: "Missing section headings",
        description: "Längere Inhalte sind nicht durch Abschnittsüberschriften gegliedert.",
        user_impact: "Nutzer können Inhalte nicht gezielt ansteuern.",
        user_impact_en: "Users cannot jump directly to specific content.",
        technical_impact: "Fehlende Sub-Headings in langen Inhaltsblöcken.",
        technical_impact_en: "Missing sub-headings in long content blocks.",
        score_impact: ScoreImpact {
            base_penalty: 1.0,
            max_penalty: 3.0,
            occurrence_scaling: Scaling::Fixed,
        },
        report_visibility: VIS_STANDARD,
    },
    Rule {
        id: "a11y.orientation.restricted",
        dimension: Dimension::Accessibility,
        subcategory: Subcategory::StructureSemantics,
        issue_class: IssueClass::Weak,
        severity: Severity::High,
        external_ref: Some("WCAG 1.3.4"),
        external_level: Some("AA"),
        axe_id: Some("css-orientation-lock"),
        title: "Eingeschränkte Bildschirmausrichtung",
        title_en: "Restricted screen orientation",
        description: "Die Seite erzwingt eine bestimmte Bildschirmausrichtung (Hoch- oder Querformat).",
        user_impact: "Nutzer mit fest montierten Bildschirmen (z. B. am Rollstuhl) können die Seite nicht lesen.",
        user_impact_en: "Users with fixed-mount screens (e.g. wheelchair-mounted) cannot read the page.",
        technical_impact: "CSS-Medienabfragen blockieren die Ausrichtung.",
        technical_impact_en: "CSS media queries lock the orientation.",
        score_impact: ScoreImpact {
            base_penalty: 3.0,
            max_penalty: 10.0,
            occurrence_scaling: Scaling::Logarithmic,
        },
        report_visibility: VIS_ALL,
    },
    // ── Navigation & Bedienung ──────────────────────────────────────────────
    Rule {
        id: "a11y.keyboard.missing",
        dimension: Dimension::Accessibility,
        subcategory: Subcategory::NavigationInteraction,
        issue_class: IssueClass::Missing,
        severity: Severity::Critical,
        external_ref: Some("WCAG 2.1.1"),
        external_level: Some("A"),
        axe_id: Some("keyboard"),
        title: "Inhalte nicht per Tastatur bedienbar",
        title_en: "Content not operable by keyboard",
        description: "Funktionen nur mit Maus bedienbar.",
        user_impact: "Tastaturnutzer sind von Funktionen ausgeschlossen.",
        user_impact_en: "Keyboard users are excluded from functionality.",
        technical_impact: "Click-Handler ohne Tastatur-Alternative.",
        technical_impact_en: "Click handler without keyboard alternative.",
        score_impact: ScoreImpact {
            base_penalty: 5.0,
            max_penalty: 15.0,
            occurrence_scaling: Scaling::Logarithmic,
        },
        report_visibility: VIS_ALL,
    },
    Rule {
        id: "a11y.keyboard_trap.risk",
        dimension: Dimension::Accessibility,
        subcategory: Subcategory::NavigationInteraction,
        issue_class: IssueClass::Risk,
        severity: Severity::Critical,
        external_ref: Some("WCAG 2.1.2"),
        external_level: Some("A"),
        axe_id: Some("keyboard-trap"),
        title: "Tastaturfalle — Fokus kann nicht verlassen werden",
        title_en: "Keyboard trap — focus cannot leave the element",
        description: "Tastaturfokus bleibt an bestimmten Stellen hängen.",
        user_impact: "Seite wird faktisch unbenutzbar für Tastaturnutzer.",
        user_impact_en: "The page becomes effectively unusable for keyboard users.",
        technical_impact: "Fehlende Fokus-Verwaltung in modalen Elementen.",
        technical_impact_en: "Missing focus management in modal elements.",
        score_impact: ScoreImpact {
            base_penalty: 10.0,
            max_penalty: 15.0,
            occurrence_scaling: Scaling::Fixed,
        },
        report_visibility: VIS_ALL,
    },
    Rule {
        id: "a11y.bypass_blocks.missing",
        dimension: Dimension::Accessibility,
        subcategory: Subcategory::NavigationInteraction,
        issue_class: IssueClass::Missing,
        severity: Severity::High,
        external_ref: Some("WCAG 2.4.1"),
        external_level: Some("A"),
        axe_id: Some("bypass"),
        title: "Fehlende Sprungnavigation",
        title_en: "Missing bypass navigation",
        description: "Kein Skip-Link oder Mechanismus zum Überspringen wiederkehrender Blöcke.",
        user_impact: "Tastaturnutzer müssen bei jedem Seitenwechsel durch die Navigation tabben.",
        user_impact_en: "Keyboard users must tab through the navigation on every page change.",
        technical_impact: "Fehlender Skip-Link, fehlende HTML5-Landmarks.",
        technical_impact_en: "Missing skip link, missing HTML5 landmarks.",
        score_impact: ScoreImpact {
            base_penalty: 3.0,
            max_penalty: 8.0,
            occurrence_scaling: Scaling::Fixed,
        },
        report_visibility: VIS_STANDARD,
    },
    Rule {
        id: "a11y.page_title.missing",
        dimension: Dimension::Accessibility,
        subcategory: Subcategory::NavigationInteraction,
        issue_class: IssueClass::Missing,
        severity: Severity::High,
        external_ref: Some("WCAG 2.4.2"),
        external_level: Some("A"),
        axe_id: Some("document-title"),
        title: "Fehlender oder unzureichender Seitentitel",
        title_en: "Missing or insufficient page title",
        description: "Seite hat keinen aussagekräftigen Title-Tag.",
        user_impact: "Screenreader-Nutzer können die Seite nicht identifizieren.",
        user_impact_en: "Screen reader users cannot identify the page.",
        technical_impact: "Leeres oder generisches <title>-Tag.",
        technical_impact_en: "Empty or generic <title> tag.",
        score_impact: ScoreImpact {
            base_penalty: 5.0,
            max_penalty: 5.0,
            occurrence_scaling: Scaling::Fixed,
        },
        report_visibility: VIS_ALL,
    },
    Rule {
        id: "a11y.landmark_main.missing",
        dimension: Dimension::Accessibility,
        subcategory: Subcategory::NavigationInteraction,
        issue_class: IssueClass::Missing,
        severity: Severity::High,
        external_ref: Some("WCAG 1.3.1"),
        external_level: Some("A"),
        axe_id: Some("landmark-main-present"),
        title: "Fehlender Hauptbereich",
        title_en: "Missing main landmark",
        description: "Die Seite hat kein <main>-Element oder role=\"main\".",
        user_impact: "Screenreader- und Tastaturnutzer können nicht direkt zum Hauptinhalt springen.",
        user_impact_en: "Screen reader and keyboard users cannot jump directly to the main content.",
        technical_impact: "Fehlendes main-Landmark im DOM oder Accessibility Tree.",
        technical_impact_en: "Missing main landmark in the DOM or accessibility tree.",
        score_impact: ScoreImpact {
            base_penalty: 3.0,
            max_penalty: 8.0,
            occurrence_scaling: Scaling::Fixed,
        },
        report_visibility: VIS_STANDARD,
    },
    Rule {
        id: "a11y.landmark_unique.invalid",
        dimension: Dimension::Accessibility,
        subcategory: Subcategory::StructureSemantics,
        issue_class: IssueClass::Invalid,
        severity: Severity::Medium,
        external_ref: Some("WCAG 1.3.1"),
        external_level: Some("A"),
        axe_id: Some("landmark-unique"),
        title: "Landmarks nicht eindeutig benannt",
        title_en: "Landmarks are not uniquely named",
        description: "Mehrere Landmarks desselben Typs haben denselben zugänglichen Namen.",
        user_impact: "Screenreader-Nutzer können gleichartige Bereiche nicht unterscheiden.",
        user_impact_en: "Screen reader users cannot distinguish similar regions.",
        technical_impact: "Mehrfach verwendete Landmark-Rollen ohne eindeutige aria-label/aria-labelledby-Werte.",
        technical_impact_en: "Repeated landmark roles without unique aria-label/aria-labelledby values.",
        score_impact: ScoreImpact {
            base_penalty: 1.5,
            max_penalty: 4.0,
            occurrence_scaling: Scaling::Logarithmic,
        },
        report_visibility: VIS_STANDARD,
    },
    Rule {
        id: "a11y.focus_order.weak",
        dimension: Dimension::Accessibility,
        subcategory: Subcategory::NavigationInteraction,
        issue_class: IssueClass::Weak,
        severity: Severity::High,
        external_ref: Some("WCAG 2.4.3"),
        external_level: Some("A"),
        axe_id: Some("focus-order-semantics"),
        title: "Unlogische Fokus-Reihenfolge",
        title_en: "Illogical focus order",
        description: "Tab-Reihenfolge entspricht nicht der visuellen Reihenfolge.",
        user_impact: "Verwirrende Navigation für Tastaturnutzer.",
        user_impact_en: "Confusing navigation for keyboard users.",
        technical_impact: "DOM-Reihenfolge weicht von visueller Reihenfolge ab.",
        technical_impact_en: "DOM order diverges from the visual order.",
        score_impact: ScoreImpact {
            base_penalty: 2.5,
            max_penalty: 8.0,
            occurrence_scaling: Scaling::Logarithmic,
        },
        report_visibility: VIS_STANDARD,
    },
    Rule {
        id: "a11y.link_purpose.weak",
        dimension: Dimension::Accessibility,
        subcategory: Subcategory::NavigationInteraction,
        issue_class: IssueClass::Weak,
        severity: Severity::Medium,
        external_ref: Some("WCAG 2.4.4"),
        external_level: Some("A"),
        axe_id: Some("link-name"),
        title: "Unklare oder generische Linktexte",
        title_en: "Unclear or generic link text",
        description: "Links mit Texten wie 'hier', 'mehr', 'weiterlesen'.",
        user_impact: "Screenreader-Linklisten zeigen nichtssagende Texte.",
        user_impact_en: "Screen reader link lists show meaningless text.",
        technical_impact: "Generische Link-Texte ohne Kontext.",
        technical_impact_en: "Generic link text without context.",
        score_impact: ScoreImpact {
            base_penalty: 1.0,
            max_penalty: 5.0,
            occurrence_scaling: Scaling::Logarithmic,
        },
        report_visibility: VIS_STANDARD,
    },
    Rule {
        id: "a11y.focus_visible.missing",
        dimension: Dimension::Accessibility,
        subcategory: Subcategory::NavigationInteraction,
        issue_class: IssueClass::Missing,
        severity: Severity::High,
        external_ref: Some("WCAG 2.4.7"),
        external_level: Some("AA"),
        axe_id: Some("focus-visible"),
        title: "Fokus-Indikator nicht sichtbar",
        title_en: "Focus indicator not visible",
        description: "Kein visueller Fokus-Rahmen bei Tastaturnavigation.",
        user_impact: "Tastaturnutzer sehen nicht, welches Element fokussiert ist.",
        user_impact_en: "Keyboard users cannot see which element is focused.",
        technical_impact: "CSS outline:none ohne Alternative.",
        technical_impact_en: "CSS outline:none without an alternative.",
        score_impact: ScoreImpact {
            base_penalty: 3.0,
            max_penalty: 8.0,
            occurrence_scaling: Scaling::Fixed,
        },
        report_visibility: VIS_ALL,
    },
    Rule {
        id: "a11y.label_in_name.invalid",
        dimension: Dimension::Accessibility,
        subcategory: Subcategory::NavigationInteraction,
        issue_class: IssueClass::Invalid,
        severity: Severity::High,
        external_ref: Some("WCAG 2.5.3"),
        external_level: Some("A"),
        axe_id: Some("label-in-name"),
        title: "Sichtbarer Text ≠ zugänglicher Name",
        title_en: "Visible text ≠ accessible name",
        description: "Sichtbarer Text und aria-label stimmen nicht überein.",
        user_impact: "Sprachsteuerungsnutzer können Element nicht ansprechen.",
        user_impact_en: "Voice-control users cannot address the element.",
        technical_impact: "aria-label weicht vom sichtbaren Text ab.",
        technical_impact_en: "aria-label diverges from the visible text.",
        score_impact: ScoreImpact {
            base_penalty: 2.5,
            max_penalty: 8.0,
            occurrence_scaling: Scaling::Logarithmic,
        },
        report_visibility: VIS_STANDARD,
    },
    Rule {
        id: "a11y.timing.unadjustable",
        dimension: Dimension::Accessibility,
        subcategory: Subcategory::NavigationInteraction,
        issue_class: IssueClass::Weak,
        severity: Severity::High,
        external_ref: Some("WCAG 2.2.1"),
        external_level: Some("A"),
        axe_id: Some("meta-refresh"),
        title: "Nicht anpassbare Zeitbegrenzung",
        title_en: "Non-adjustable time limit",
        description: "Zeitbegrenzungen auf der Seite können nicht deaktiviert oder verlängert werden.",
        user_impact: "Nutzer benötigen mehr Zeit für die Eingabe und können durch Timeouts Daten verlieren.",
        user_impact_en: "Users need more time to enter data and may lose data through timeouts.",
        technical_impact: "Fehlendes Refresh- oder Timeout-Handling im Script/Markup.",
        technical_impact_en: "Missing refresh or timeout handling in the script/markup.",
        score_impact: ScoreImpact {
            base_penalty: 3.0,
            max_penalty: 10.0,
            occurrence_scaling: Scaling::Logarithmic,
        },
        report_visibility: VIS_ALL,
    },
    Rule {
        id: "a11y.timing.essential",
        dimension: Dimension::Accessibility,
        subcategory: Subcategory::NavigationInteraction,
        issue_class: IssueClass::Risk,
        severity: Severity::Medium,
        external_ref: Some("WCAG 2.2.3"),
        external_level: Some("AAA"),
        axe_id: Some("no-timing"),
        title: "Zeitbegrenzung vorhanden (AAA)",
        title_en: "Timing present (AAA)",
        description: "Die Seite verwendet essenzielle Zeitbegrenzungen ohne Möglichkeit der Deaktivierung.",
        user_impact: "Nutzer können Aufgaben nicht in ihrem eigenen Tempo abschließen.",
        user_impact_en: "Users cannot complete tasks at their own pace.",
        technical_impact: "Aktive Zeitbegrenzungen auf der Seite.",
        technical_impact_en: "Active time limits on the page.",
        score_impact: ScoreImpact {
            base_penalty: 0.5,
            max_penalty: 1.5,
            occurrence_scaling: Scaling::Logarithmic,
        },
        report_visibility: VIS_STANDARD,
    },
    Rule {
        id: "a11y.interruptions.uncontrollable",
        dimension: Dimension::Accessibility,
        subcategory: Subcategory::NavigationInteraction,
        issue_class: IssueClass::Risk,
        severity: Severity::Low,
        external_ref: Some("WCAG 2.2.4"),
        external_level: Some("AAA"),
        axe_id: Some("no-interruptions"),
        title: "Nicht unterdrückbare Unterbrechungen (AAA)",
        title_en: "Non-suppressible interruptions (AAA)",
        description: "Die Seite zeigt Warnungen oder Popups, die der Nutzer nicht verschieben kann.",
        user_impact: "Nutzer mit kognitiven Einschränkungen oder Screenreader-Nutzer werden abgelenkt.",
        user_impact_en: "Users with cognitive impairments or screen reader users are distracted.",
        technical_impact: "Unerwartete Dialoge oder assertive Live-Regionen.",
        technical_impact_en: "Unexpected dialogs or assertive live regions.",
        score_impact: ScoreImpact {
            base_penalty: 0.5,
            max_penalty: 1.5,
            occurrence_scaling: Scaling::Logarithmic,
        },
        report_visibility: VIS_STANDARD,
    },
    Rule {
        id: "a11y.re_authenticate.data_loss",
        dimension: Dimension::Accessibility,
        subcategory: Subcategory::NavigationInteraction,
        issue_class: IssueClass::Risk,
        severity: Severity::Low,
        external_ref: Some("WCAG 2.2.5"),
        external_level: Some("AAA"),
        axe_id: Some("re-authenticate"),
        title: "Keine Datenspeicherung bei Reauthentifizierung (AAA)",
        title_en: "No data preservation on re-authentication (AAA)",
        description: "Eingegebene Daten gehen verloren, wenn eine Session abläuft und sich der Nutzer neu anmeldet.",
        user_impact: "Nutzer müssen alle Formulardaten erneut eingeben.",
        user_impact_en: "Users must re-enter all form data.",
        technical_impact: "Fehlende Session-Datensicherung.",
        technical_impact_en: "Missing session data preservation.",
        score_impact: ScoreImpact {
            base_penalty: 0.5,
            max_penalty: 1.5,
            occurrence_scaling: Scaling::Logarithmic,
        },
        report_visibility: VIS_STANDARD,
    },
    Rule {
        id: "a11y.timeouts.unwarned",
        dimension: Dimension::Accessibility,
        subcategory: Subcategory::NavigationInteraction,
        issue_class: IssueClass::Risk,
        severity: Severity::Medium,
        external_ref: Some("WCAG 2.2.6"),
        external_level: Some("AAA"),
        axe_id: Some("timeouts"),
        title: "Keine Warnung vor Inaktivitäts-Timeout (AAA)",
        title_en: "No warning before inactivity timeout (AAA)",
        description: "Der Nutzer wird vor einem Timeout nicht über drohenden Datenverlust gewarnt.",
        user_impact: "Nutzer verlieren ungespeicherte Daten ohne Vorwarnung.",
        user_impact_en: "Users lose unsaved data without warning.",
        technical_impact: "Fehlendes Timeout-Warnsystem.",
        technical_impact_en: "Missing timeout warning system.",
        score_impact: ScoreImpact {
            base_penalty: 0.5,
            max_penalty: 1.5,
            occurrence_scaling: Scaling::Logarithmic,
        },
        report_visibility: VIS_STANDARD,
    },
    Rule {
        id: "a11y.location.missing",
        dimension: Dimension::Accessibility,
        subcategory: Subcategory::NavigationInteraction,
        issue_class: IssueClass::Missing,
        severity: Severity::Low,
        external_ref: Some("WCAG 2.4.8"),
        external_level: Some("AAA"),
        axe_id: Some("location"),
        title: "Fehlende Positionsangabe (AAA)",
        title_en: "Missing location indication (AAA)",
        description: "Es gibt keine Orientierungshilfe (wie Breadcrumbs), um den aktuellen Ort in einem Webauftritt anzuzeigen.",
        user_impact: "Nutzer verlieren die Orientierung auf verschachtelten Webseiten.",
        user_impact_en: "Users lose orientation within nested websites.",
        technical_impact: "Fehlende Breadcrumb-Navigation oder Sitemap-Verbindung.",
        technical_impact_en: "Missing breadcrumb navigation or sitemap linkage.",
        score_impact: ScoreImpact {
            base_penalty: 0.5,
            max_penalty: 1.5,
            occurrence_scaling: Scaling::Logarithmic,
        },
        report_visibility: VIS_STANDARD,
    },
    Rule {
        id: "a11y.link_purpose_only.weak",
        dimension: Dimension::Accessibility,
        subcategory: Subcategory::NavigationInteraction,
        issue_class: IssueClass::Weak,
        severity: Severity::Medium,
        external_ref: Some("WCAG 2.4.9"),
        external_level: Some("AAA"),
        axe_id: Some("link-name"),
        title: "Unklare Linkbeschriftung ohne Kontext (AAA)",
        title_en: "Unclear link label without context (AAA)",
        description: "Der Zweck eines Links geht nicht allein aus dem Linktext hervor.",
        user_impact: "Nutzer müssen den gesamten Absatz lesen, um das Ziel eines Links zu verstehen.",
        user_impact_en: "Users must read the entire paragraph to understand a link's destination.",
        technical_impact: "Generischer Linktext wie 'Mehr lesen' oder 'Hier klicken'.",
        technical_impact_en: "Generic link text such as 'read more' or 'click here'.",
        score_impact: ScoreImpact {
            base_penalty: 0.5,
            max_penalty: 1.5,
            occurrence_scaling: Scaling::Logarithmic,
        },
        report_visibility: VIS_STANDARD,
    },
    Rule {
        id: "a11y.pointer_gestures.missing_alternative",
        dimension: Dimension::Accessibility,
        subcategory: Subcategory::NavigationInteraction,
        issue_class: IssueClass::Missing,
        severity: Severity::Medium,
        external_ref: Some("WCAG 2.5.1"),
        external_level: Some("AAA"),
        axe_id: Some("pointer-gestures"),
        title: "Fehlende Alternative für Zeigergesten (AAA)",
        title_en: "Missing alternative for pointer gestures (AAA)",
        description: "Funktionen erfordern komplexe Mehrfinger- oder Pfadgesten ohne einfache Klick-Alternative.",
        user_impact: "Nutzer mit motorischen Einschränkungen können die Funktionen nicht bedienen.",
        user_impact_en: "Users with motor impairments cannot operate the functionality.",
        technical_impact: "Erforderliche Touch-Gesten ohne Klick-Fallback.",
        technical_impact_en: "Required touch gestures without a click fallback.",
        score_impact: ScoreImpact {
            base_penalty: 0.5,
            max_penalty: 1.5,
            occurrence_scaling: Scaling::Logarithmic,
        },
        report_visibility: VIS_STANDARD,
    },
    Rule {
        id: "a11y.pointer_cancellation.invalid",
        dimension: Dimension::Accessibility,
        subcategory: Subcategory::NavigationInteraction,
        issue_class: IssueClass::Invalid,
        severity: Severity::Medium,
        external_ref: Some("WCAG 2.5.2"),
        external_level: Some("AAA"),
        axe_id: Some("pointer-cancellation"),
        title: "Auslösung von Aktionen bei Zeigerberührung (AAA)",
        title_en: "Action triggered on pointer down (AAA)",
        description: "Aktionen werden sofort beim Drücken (down-event) statt beim Loslassen (up-event) ausgeführt.",
        user_impact: "Nutzer können versehentlich Aktionen auslösen, ohne diese abbrechen zu können.",
        user_impact_en: "Users may trigger actions accidentally without being able to cancel them.",
        technical_impact: "Event-Handler reagieren auf mousedown oder touchstart statt click oder mouseup.",
        technical_impact_en: "Event handlers respond to mousedown or touchstart instead of click or mouseup.",
        score_impact: ScoreImpact {
            base_penalty: 0.5,
            max_penalty: 1.5,
            occurrence_scaling: Scaling::Logarithmic,
        },
        report_visibility: VIS_STANDARD,
    },
    Rule {
        id: "a11y.motion_actuation.missing_alternative",
        dimension: Dimension::Accessibility,
        subcategory: Subcategory::NavigationInteraction,
        issue_class: IssueClass::Missing,
        severity: Severity::Medium,
        external_ref: Some("WCAG 2.5.4"),
        external_level: Some("AAA"),
        axe_id: Some("motion-actuation"),
        title: "Fehlende Alternative für Bewegungseingabe (AAA)",
        title_en: "Missing alternative for motion actuation (AAA)",
        description: "Aktionen, die durch Schütteln oder Bewegen des Geräts ausgelöst werden, haben keine klassische Bedienalternative.",
        user_impact: "Nutzer, die das Gerät nicht bewegen können, sind von den Funktionen ausgeschlossen.",
        user_impact_en: "Users who cannot move the device are excluded from the functionality.",
        technical_impact: "Nutzen von Device-Motion-APIs ohne UI-Bedienelemente.",
        technical_impact_en: "Use of device-motion APIs without UI controls.",
        score_impact: ScoreImpact {
            base_penalty: 0.5,
            max_penalty: 1.5,
            occurrence_scaling: Scaling::Logarithmic,
        },
        report_visibility: VIS_STANDARD,
    },
    Rule {
        id: "a11y.target_size_enhanced.small",
        dimension: Dimension::Accessibility,
        subcategory: Subcategory::NavigationInteraction,
        issue_class: IssueClass::Weak,
        severity: Severity::Medium,
        external_ref: Some("WCAG 2.5.5"),
        external_level: Some("AAA"),
        axe_id: Some("target-size"),
        title: "Unzureichende Klickzielgröße (AAA)",
        title_en: "Insufficient click target size (AAA)",
        description: "Bedienelemente haben eine Klickfläche von weniger als 44x44 CSS-Pixeln.",
        user_impact: "Nutzer mit zittrigen Händen oder auf Mobilgeräten klicken leicht auf falsche Elemente.",
        user_impact_en: "Users with hand tremors or on mobile devices easily tap the wrong elements.",
        technical_impact: "Zu kleine Abmessungen von Links, Buttons oder Formularelementen im CSS.",
        technical_impact_en: "Links, buttons or form controls dimensioned too small in CSS.",
        score_impact: ScoreImpact {
            base_penalty: 0.5,
            max_penalty: 1.5,
            occurrence_scaling: Scaling::Logarithmic,
        },
        report_visibility: VIS_STANDARD,
    },
    // ── Formulare & Interaktion ─────────────────────────────────────────────
    Rule {
        id: "a11y.input_purpose.missing",
        dimension: Dimension::Accessibility,
        subcategory: Subcategory::FormsInteraction,
        issue_class: IssueClass::Missing,
        severity: Severity::Medium,
        external_ref: Some("WCAG 1.3.5"),
        external_level: Some("AA"),
        axe_id: Some("autocomplete-valid"),
        title: "Fehlende Eingabezweck-Kennzeichnung",
        title_en: "Missing input purpose identification",
        description: "Formularfelder ohne autocomplete-Attribut.",
        user_impact: "Kein Autofill möglich, Eingabe fehleranfälliger.",
        user_impact_en: "No autofill possible, data entry more error-prone.",
        technical_impact: "Fehlende autocomplete-Attribute.",
        technical_impact_en: "Missing autocomplete attributes.",
        score_impact: ScoreImpact {
            base_penalty: 1.0,
            max_penalty: 5.0,
            occurrence_scaling: Scaling::Logarithmic,
        },
        report_visibility: VIS_STANDARD,
    },
    Rule {
        id: "a11y.form_labels.missing",
        dimension: Dimension::Accessibility,
        subcategory: Subcategory::FormsInteraction,
        issue_class: IssueClass::Missing,
        severity: Severity::High,
        external_ref: Some("WCAG 3.3.2"),
        external_level: Some("A"),
        axe_id: Some("label"),
        title: "Fehlende Formularbeschriftungen",
        title_en: "Missing form labels",
        description: "Formularfelder ohne sichtbare Labels.",
        user_impact: "Nutzer wissen nicht, welche Eingaben erwartet werden.",
        user_impact_en: "Users do not know what input is expected.",
        technical_impact: "Fehlende <label>-Elemente.",
        technical_impact_en: "Missing <label> elements.",
        score_impact: ScoreImpact {
            base_penalty: 2.5,
            max_penalty: 8.0,
            occurrence_scaling: Scaling::Logarithmic,
        },
        report_visibility: VIS_ALL,
    },
    Rule {
        id: "a11y.form_no_submit.missing",
        dimension: Dimension::Accessibility,
        subcategory: Subcategory::FormsInteraction,
        issue_class: IssueClass::Missing,
        severity: Severity::Medium,
        external_ref: Some("WCAG 3.2.2"),
        external_level: Some("A"),
        axe_id: Some("form-no-submit"),
        title: "Formular ohne Absende-Button",
        title_en: "Form without submit button",
        description: "Formular mit Eingabefeldern hat keinen expliziten Submit-Button.",
        user_impact: "Tastatur- und Screenreader-Nutzer erkennen den Abschluss der Eingabe schwerer.",
        user_impact_en: "Keyboard and screen reader users have a harder time completing the form.",
        technical_impact: "Fehlendes Submit-Control im Formular.",
        technical_impact_en: "Missing submit control in the form.",
        score_impact: ScoreImpact {
            base_penalty: 1.5,
            max_penalty: 4.0,
            occurrence_scaling: Scaling::Logarithmic,
        },
        report_visibility: VIS_STANDARD,
    },
    Rule {
        id: "a11y.error_id.missing_description",
        dimension: Dimension::Accessibility,
        subcategory: Subcategory::FormsInteraction,
        issue_class: IssueClass::Missing,
        severity: Severity::Medium,
        external_ref: Some("WCAG 3.3.1"),
        external_level: Some("A"),
        axe_id: Some("aria-invalid-without-describedby"),
        title: "Unzureichende Fehlermeldung bei Eingabefehlern",
        title_en: "Insufficient error message on input errors",
        description: "Fehlerhafte Formulareingaben werden nicht präzise identifiziert oder beschrieben.",
        user_impact: "Nutzer können Fehler im Formular nicht korrigieren, weil sie nicht wissen, was falsch ist.",
        user_impact_en: "Users cannot correct form errors because they do not know what is wrong.",
        technical_impact: "Fehlendes aria-invalid-Attribut oder fehlerhaft verknüpfte aria-describedby-IDs.",
        technical_impact_en: "Missing aria-invalid attribute or incorrectly linked aria-describedby IDs.",
        score_impact: ScoreImpact {
            base_penalty: 2.0,
            max_penalty: 5.0,
            occurrence_scaling: Scaling::Logarithmic,
        },
        report_visibility: VIS_STANDARD,
    },
    Rule {
        id: "a11y.help.missing",
        dimension: Dimension::Accessibility,
        subcategory: Subcategory::FormsInteraction,
        issue_class: IssueClass::Missing,
        severity: Severity::Low,
        external_ref: Some("WCAG 3.3.5"),
        external_level: Some("AAA"),
        axe_id: Some("help"),
        title: "Fehlende Ausfüllhilfe (AAA)",
        title_en: "Missing input help (AAA)",
        description: "Für Eingabefelder gibt es keine kontextsensitive Ausfüllhilfe.",
        user_impact: "Nutzer wissen nicht, welches Format oder welche Daten in ein Feld eingegeben werden müssen.",
        user_impact_en: "Users do not know what format or data to enter in a field.",
        technical_impact: "Fehlendes Formular-Hilfesystem.",
        technical_impact_en: "Missing form help system.",
        score_impact: ScoreImpact {
            base_penalty: 0.5,
            max_penalty: 1.5,
            occurrence_scaling: Scaling::Logarithmic,
        },
        report_visibility: VIS_STANDARD,
    },
    // ── Sprache & Verständlichkeit ──────────────────────────────────────────
    Rule {
        id: "a11y.language.missing",
        dimension: Dimension::Accessibility,
        subcategory: Subcategory::LanguageClarity,
        issue_class: IssueClass::Missing,
        severity: Severity::High,
        external_ref: Some("WCAG 3.1.1"),
        external_level: Some("A"),
        axe_id: Some("html-has-lang"),
        title: "Fehlende Sprachangabe",
        title_en: "Missing language declaration",
        description: "Kein lang-Attribut im HTML-Tag.",
        user_impact: "Screenreader liest mit falscher Aussprache vor.",
        user_impact_en: "Screen readers read aloud with incorrect pronunciation.",
        technical_impact: "Fehlendes lang-Attribut.",
        technical_impact_en: "Missing lang attribute.",
        score_impact: ScoreImpact {
            base_penalty: 10.0,
            max_penalty: 12.5,
            occurrence_scaling: Scaling::Fixed,
        },
        report_visibility: VIS_ALL,
    },
    Rule {
        id: "a11y.on_focus.risk",
        dimension: Dimension::Accessibility,
        subcategory: Subcategory::NavigationInteraction,
        issue_class: IssueClass::Risk,
        severity: Severity::High,
        external_ref: Some("WCAG 3.2.1"),
        external_level: Some("A"),
        axe_id: Some("focus-no-context-change"),
        title: "Unerwartete Kontextänderung bei Fokus",
        title_en: "Unexpected context change on focus",
        description: "Fokuserhalt löst unerwartete Kontextänderung aus.",
        user_impact: "Verwirrende Seitenänderungen für Tastaturnutzer.",
        user_impact_en: "Confusing page changes for keyboard users.",
        technical_impact: "onfocus-Handler lösen Navigation aus.",
        technical_impact_en: "onfocus handlers trigger navigation.",
        score_impact: ScoreImpact {
            base_penalty: 3.0,
            max_penalty: 8.0,
            occurrence_scaling: Scaling::Fixed,
        },
        report_visibility: VIS_STANDARD,
    },
    Rule {
        id: "a11y.on_input.risk",
        dimension: Dimension::Accessibility,
        subcategory: Subcategory::NavigationInteraction,
        issue_class: IssueClass::Risk,
        severity: Severity::Medium,
        external_ref: Some("WCAG 3.2.2"),
        external_level: Some("A"),
        axe_id: Some("input-no-context-change"),
        title: "Unerwartete Kontextänderung bei Eingabe",
        title_en: "Unexpected context change on input",
        description: "Formularänderung löst unangekündigte Kontextänderung aus.",
        user_impact: "Verwirrende Änderungen beim Ausfüllen.",
        user_impact_en: "Confusing changes while filling out forms.",
        technical_impact: "Auto-submit bei onchange.",
        technical_impact_en: "Auto-submit on onchange.",
        score_impact: ScoreImpact {
            base_penalty: 2.0,
            max_penalty: 5.0,
            occurrence_scaling: Scaling::Fixed,
        },
        report_visibility: VIS_STANDARD,
    },
    Rule {
        id: "a11y.unusual_words.missing_definition",
        dimension: Dimension::Accessibility,
        subcategory: Subcategory::LanguageClarity,
        issue_class: IssueClass::Missing,
        severity: Severity::Low,
        external_ref: Some("WCAG 3.1.3"),
        external_level: Some("AAA"),
        axe_id: Some("unusual-words"),
        title: "Fehlende Erklärung unüblicher Wörter (AAA)",
        title_en: "Missing explanation of unusual words (AAA)",
        description: "Für ungewöhnliche Wörter, Jargon oder Redewendungen gibt es keine Definitionen.",
        user_impact: "Nutzer mit kognitiven Einschränkungen oder Fremdsprachler verstehen den Text nicht.",
        user_impact_en: "Users with cognitive impairments or non-native speakers do not understand the text.",
        technical_impact: "Fehlende Glossar-Verlinkung oder Erklärung im Text.",
        technical_impact_en: "Missing glossary linkage or in-text explanation.",
        score_impact: ScoreImpact {
            base_penalty: 0.5,
            max_penalty: 1.5,
            occurrence_scaling: Scaling::Logarithmic,
        },
        report_visibility: VIS_STANDARD,
    },
    Rule {
        id: "a11y.abbreviations.missing",
        dimension: Dimension::Accessibility,
        subcategory: Subcategory::LanguageClarity,
        issue_class: IssueClass::Missing,
        severity: Severity::Low,
        external_ref: Some("WCAG 3.1.4"),
        external_level: Some("AAA"),
        axe_id: Some("abbreviations"),
        title: "Fehlende Erklärung von Abkürzungen (AAA)",
        title_en: "Missing explanation of abbreviations (AAA)",
        description: "Abkürzungen werden nicht bei ihrer ersten Verwendung oder über ein Mechanismus erklärt.",
        user_impact: "Nutzer verstehen den Inhalt nicht, wenn sie die Abkürzung nicht kennen.",
        user_impact_en: "Users do not understand the content if they do not know the abbreviation.",
        technical_impact: "Fehlendes abbr-Tag mit title-Attribut.",
        technical_impact_en: "Missing abbr tag with title attribute.",
        score_impact: ScoreImpact {
            base_penalty: 0.5,
            max_penalty: 1.5,
            occurrence_scaling: Scaling::Logarithmic,
        },
        report_visibility: VIS_STANDARD,
    },
    // ── Visuelle Darstellung / Kontrast ─────────────────────────────────────
    Rule {
        id: "a11y.contrast.weak",
        dimension: Dimension::Accessibility,
        subcategory: Subcategory::VisualPresentation,
        issue_class: IssueClass::Weak,
        severity: Severity::High,
        external_ref: Some("WCAG 1.4.3"),
        external_level: Some("AA"),
        axe_id: Some("color-contrast"),
        title: "Unzureichender Farbkontrast",
        title_en: "Insufficient color contrast",
        description: "Text hat nicht genügend Kontrast zum Hintergrund.",
        user_impact: "Text bei Sehschwäche oder ungünstigen Lichtverhältnissen schwer lesbar.",
        user_impact_en: "Text is hard to read for people with low vision or under poor lighting conditions.",
        technical_impact: "Kontrastverhältnis unter 4.5:1 für normalen Text.",
        technical_impact_en: "Contrast ratio below 4.5:1 for normal text.",
        score_impact: ScoreImpact {
            base_penalty: 5.0,
            max_penalty: 12.0,
            occurrence_scaling: Scaling::Logarithmic,
        },
        report_visibility: VIS_ALL,
    },
    Rule {
        id: "a11y.resize_text.weak",
        dimension: Dimension::Accessibility,
        subcategory: Subcategory::VisualPresentation,
        issue_class: IssueClass::Weak,
        severity: Severity::High,
        external_ref: Some("WCAG 1.4.4"),
        external_level: Some("AA"),
        axe_id: Some("meta-viewport"),
        title: "Text nicht ausreichend skalierbar",
        title_en: "Text not sufficiently resizable",
        description: "Texte können nicht auf 200% vergrößert werden.",
        user_impact: "Nutzer mit Sehschwäche verlieren Inhalte bei Vergrößerung.",
        user_impact_en: "Users with low vision lose content when zooming in.",
        technical_impact: "Feste Pixelwerte, overflow:hidden.",
        technical_impact_en: "Fixed pixel values, overflow:hidden.",
        score_impact: ScoreImpact {
            base_penalty: 2.5,
            max_penalty: 8.0,
            occurrence_scaling: Scaling::Logarithmic,
        },
        report_visibility: VIS_STANDARD,
    },
    Rule {
        id: "a11y.reflow.missing",
        dimension: Dimension::Accessibility,
        subcategory: Subcategory::VisualPresentation,
        issue_class: IssueClass::Missing,
        severity: Severity::High,
        external_ref: Some("WCAG 1.4.10"),
        external_level: Some("AA"),
        axe_id: Some("css-overflow-hidden"),
        title: "Kein Reflow bei 320 CSS-Pixeln",
        title_en: "No reflow at 320 CSS pixels",
        description: "Seite erfordert horizontales Scrollen bei einer Ansichtsbreite von 320 CSS-Pixeln.",
        user_impact: "Nutzer, die auf 400 % zoomen, müssen in zwei Richtungen scrollen — Inhalte werden unzugänglich.",
        user_impact_en: "Users zooming to 400% must scroll in two directions — content becomes inaccessible.",
        technical_impact: "Feste Breiten oder overflow:hidden verhindern responsives Reflow.",
        technical_impact_en: "Fixed widths or overflow:hidden prevent responsive reflow.",
        score_impact: ScoreImpact {
            base_penalty: 3.0,
            max_penalty: 10.0,
            occurrence_scaling: Scaling::Fixed,
        },
        report_visibility: VIS_STANDARD,
    },
    Rule {
        id: "a11y.non_text_contrast.weak",
        dimension: Dimension::Accessibility,
        subcategory: Subcategory::VisualPresentation,
        issue_class: IssueClass::Weak,
        severity: Severity::Medium,
        external_ref: Some("WCAG 1.4.11"),
        external_level: Some("AA"),
        axe_id: Some("non-text-contrast"),
        title: "Unzureichender Kontrast bei UI-Elementen",
        title_en: "Insufficient contrast for UI elements",
        description: "Bedienelemente haben nicht genügend Kontrast.",
        user_impact: "Interaktive Elemente schwer erkennbar.",
        user_impact_en: "Interactive elements are hard to recognize.",
        technical_impact: "Kontrastverhältnis UI-Elemente unter 3:1.",
        technical_impact_en: "Contrast ratio of UI elements below 3:1.",
        score_impact: ScoreImpact {
            base_penalty: 1.5,
            max_penalty: 5.0,
            occurrence_scaling: Scaling::Logarithmic,
        },
        report_visibility: VIS_STANDARD,
    },
    Rule {
        id: "a11y.color.link_indicator",
        dimension: Dimension::Accessibility,
        subcategory: Subcategory::VisualPresentation,
        issue_class: IssueClass::Weak,
        severity: Severity::Medium,
        external_ref: Some("WCAG 1.4.1"),
        external_level: Some("A"),
        axe_id: Some("link-in-text-block"),
        title: "Link nur durch Farbe unterscheidbar",
        title_en: "Link distinguishable by color only",
        description: "Inline-Link hebt sich vom Fließtext nur durch Farbe ab, ohne weitere visuelle Unterscheidung.",
        user_impact: "Nutzer mit Farbsehschwäche können Links im Text nicht erkennen.",
        user_impact_en: "Users with color vision deficiency cannot recognize in-text links.",
        technical_impact: "Kein Unterstrich, Fettschrift oder anderes nicht-farbliches Merkmal vorhanden.",
        technical_impact_en: "No underline, bold weight or other non-color cue present.",
        score_impact: ScoreImpact {
            base_penalty: 3.0,
            max_penalty: 8.0,
            occurrence_scaling: Scaling::Logarithmic,
        },
        report_visibility: VIS_STANDARD,
    },
    Rule {
        id: "a11y.motion.reduced_motion",
        dimension: Dimension::Accessibility,
        subcategory: Subcategory::VisualPresentation,
        issue_class: IssueClass::Missing,
        severity: Severity::Low,
        external_ref: Some("WCAG 2.3.3"),
        external_level: Some("AAA"),
        axe_id: Some("prefers-reduced-motion"),
        title: "Animationen ohne prefers-reduced-motion",
        title_en: "Animations without prefers-reduced-motion",
        description: "Seite definiert Animationen oder Übergänge, berücksichtigt aber nicht das Systemsetting prefers-reduced-motion.",
        user_impact: "Nutzer mit vestibulären Störungen oder Photosensitivität können Bewegung nicht deaktivieren.",
        user_impact_en: "Users with vestibular disorders or photosensitivity cannot disable motion.",
        technical_impact: "Kein @media (prefers-reduced-motion) in den Stylesheets.",
        technical_impact_en: "No @media (prefers-reduced-motion) in the stylesheets.",
        score_impact: ScoreImpact {
            base_penalty: 1.0,
            max_penalty: 4.0,
            occurrence_scaling: Scaling::Fixed,
        },
        report_visibility: VIS_STANDARD,
    },
    Rule {
        id: "a11y.hover.content_visibility",
        dimension: Dimension::Accessibility,
        subcategory: Subcategory::VisualPresentation,
        issue_class: IssueClass::Weak,
        severity: Severity::Medium,
        external_ref: Some("WCAG 1.4.13"),
        external_level: Some("AA"),
        axe_id: Some("content-on-hover-focus"),
        title: "Unzugängliche Hover- oder Fokus-Inhalte (Tooltips)",
        title_en: "Inaccessible hover or focus content (tooltips)",
        description: "Zusatzinhalte bei Hover/Fokus (Tooltips) sind unzugänglich, nicht steuerbar oder unvollständig verknüpft.",
        user_impact: "Nutzer können Tooltip-Inhalte nicht lesen, diese nicht per Tastatur schließen, oder sie werden von Screenreadern ignoriert.",
        user_impact_en: "Users cannot read tooltip content, cannot dismiss it via keyboard, or it is ignored by screen readers.",
        technical_impact: "Nutzung des nativen title-Attributs als einzige Beschriftung, unvollständige ARIA-Verknüpfung (aria-describedby) oder fehlende Steuerungsmöglichkeiten.",
        technical_impact_en: "Use of the native title attribute as the only label, incomplete ARIA linkage (aria-describedby), or missing controls.",
        score_impact: ScoreImpact {
            base_penalty: 2.0,
            max_penalty: 6.0,
            occurrence_scaling: Scaling::Logarithmic,
        },
        report_visibility: VIS_STANDARD,
    },
    Rule {
        id: "a11y.background_audio.uncontrolled",
        dimension: Dimension::Accessibility,
        subcategory: Subcategory::VisualPresentation,
        issue_class: IssueClass::Risk,
        severity: Severity::Medium,
        external_ref: Some("WCAG 1.4.7"),
        external_level: Some("AAA"),
        axe_id: Some("background-audio"),
        title: "Nicht regulierbare Hintergrundgeräusche (AAA)",
        title_en: "Uncontrollable background audio (AAA)",
        description: "Hintergrundgeräusche können nicht abgeschaltet oder leiser gestellt werden.",
        user_impact: "Nutzer mit Hörgeräten oder kognitiven Einschränkungen werden stark abgelenkt.",
        user_impact_en: "Users with hearing aids or cognitive impairments are strongly distracted.",
        technical_impact: "Automatisch abspielendes Audio ohne Steuerungselemente.",
        technical_impact_en: "Auto-playing audio without controls.",
        score_impact: ScoreImpact {
            base_penalty: 0.5,
            max_penalty: 1.5,
            occurrence_scaling: Scaling::Logarithmic,
        },
        report_visibility: VIS_STANDARD,
    },
    Rule {
        id: "a11y.visual_presentation.weak",
        dimension: Dimension::Accessibility,
        subcategory: Subcategory::VisualPresentation,
        issue_class: IssueClass::Weak,
        severity: Severity::Low,
        external_ref: Some("WCAG 1.4.8"),
        external_level: Some("AAA"),
        axe_id: Some("visual-presentation"),
        title: "Eingeschränkte visuelle Darstellung von Text (AAA)",
        title_en: "Limited visual presentation of text (AAA)",
        description: "Der Text hat unzureichenden Zeilenabstand oder ist im Blocksatz formatiert.",
        user_impact: "Nutzer mit Sehbehinderungen oder Legasthenie haben Probleme beim Lesen.",
        user_impact_en: "Users with visual impairments or dyslexia have difficulty reading.",
        technical_impact: "Unzureichendes CSS-Styling für Zeilenabstand oder Blocksatz-Formatierung.",
        technical_impact_en: "Insufficient CSS styling for line spacing or justified-text formatting.",
        score_impact: ScoreImpact {
            base_penalty: 0.5,
            max_penalty: 1.5,
            occurrence_scaling: Scaling::Logarithmic,
        },
        report_visibility: VIS_STANDARD,
    },
    // ── Technische Robustheit ───────────────────────────────────────────────
    Rule {
        id: "a11y.aria_hidden_focus.invalid",
        dimension: Dimension::Accessibility,
        subcategory: Subcategory::TechnicalRobustness,
        issue_class: IssueClass::Invalid,
        severity: Severity::High,
        external_ref: Some("WCAG 4.1.2"),
        external_level: Some("A"),
        axe_id: Some("aria-hidden-focus"),
        title: "Fokussierbares Element versteckt vor Screenreadern",
        title_en: "Focusable element hidden from screen readers",
        description: "Interaktives Element ist über aria-hidden=\"true\" vor AT versteckt, aber per Tastatur erreichbar.",
        user_impact: "Tastaturnutzer erreichen Elemente, die Screenreader nicht ankündigen — unsichtbare Stolperfallen.",
        user_impact_en: "Keyboard users reach elements that screen readers do not announce — invisible traps.",
        technical_impact: "aria-hidden=\"true\" auf fokussierbarem Element oder seinem Vorfahren.",
        technical_impact_en: "aria-hidden=\"true\" on a focusable element or its ancestor.",
        score_impact: ScoreImpact {
            base_penalty: 6.0,
            max_penalty: 15.0,
            occurrence_scaling: Scaling::Logarithmic,
        },
        report_visibility: VIS_ALL,
    },
    Rule {
        id: "a11y.status_messages.broken",
        dimension: Dimension::Accessibility,
        subcategory: Subcategory::TechnicalRobustness,
        issue_class: IssueClass::Invalid,
        severity: Severity::Medium,
        external_ref: Some("WCAG 4.1.3"),
        external_level: Some("AA"),
        axe_id: Some("aria-live-region-role"),
        title: "Statusmeldungen nicht programmatisch bestimmbar",
        title_en: "Status messages not programmatically determinable",
        description: "ARIA-Live-Regionen haben eine inkonsistente Kombination aus role und aria-live.",
        user_impact: "Screenreader kündigt Statusmeldungen nicht korrekt an.",
        user_impact_en: "Screen readers do not announce status messages correctly.",
        technical_impact: "Konflikt zwischen role (alert/status/log/timer) und aria-live-Wert.",
        technical_impact_en: "Conflict between role (alert/status/log/timer) and aria-live value.",
        score_impact: ScoreImpact {
            base_penalty: 3.0,
            max_penalty: 8.0,
            occurrence_scaling: Scaling::Logarithmic,
        },
        report_visibility: VIS_STANDARD,
    },
    Rule {
        id: "a11y.identify_purpose.missing",
        dimension: Dimension::Accessibility,
        subcategory: Subcategory::TechnicalRobustness,
        issue_class: IssueClass::Missing,
        severity: Severity::Low,
        external_ref: Some("WCAG 1.3.6"),
        external_level: Some("AAA"),
        axe_id: None,
        title: "Landmark ohne unterscheidbaren Namen",
        title_en: "Landmark without distinguishable name",
        description: "Mehrere gleichartige Landmarks ohne aria-label zur Unterscheidung.",
        user_impact: "Screenreader-Nutzer können identische Landmarks nicht voneinander unterscheiden.",
        user_impact_en: "Screen reader users cannot tell identical landmarks apart.",
        technical_impact: "Fehlende aria-label/aria-labelledby auf doppelten Landmarks.",
        technical_impact_en: "Missing aria-label/aria-labelledby on duplicate landmarks.",
        score_impact: ScoreImpact {
            base_penalty: 1.0,
            max_penalty: 4.0,
            occurrence_scaling: Scaling::Logarithmic,
        },
        report_visibility: VIS_STANDARD,
    },
    Rule {
        id: "a11y.aria_required_attr.missing",
        dimension: Dimension::Accessibility,
        subcategory: Subcategory::TechnicalRobustness,
        issue_class: IssueClass::Missing,
        severity: Severity::Critical,
        external_ref: Some("WCAG 4.1.2"),
        external_level: Some("A"),
        axe_id: Some("aria-required-attr"),
        title: "Pflicht-ARIA-Attribut fehlt",
        title_en: "Required ARIA attribute missing",
        description:
            "Ein Element mit ARIA-Rolle besitzt nicht alle fuer diese Rolle erforderlichen Attribute.",
        user_impact: "Assistive Technologien koennen Zustand oder Wert des Elements nicht verlaesslich vermitteln.",
        user_impact_en:
            "Assistive technologies cannot reliably expose the element state or value.",
        technical_impact: "Rolle und ARIA-Attributsatz sind unvollstaendig.",
        technical_impact_en: "Role and ARIA attribute set are incomplete.",
        score_impact: ScoreImpact {
            base_penalty: 6.0,
            max_penalty: 15.0,
            occurrence_scaling: Scaling::Logarithmic,
        },
        report_visibility: VIS_ALL,
    },
    Rule {
        id: "a11y.name_role.missing",
        dimension: Dimension::Accessibility,
        subcategory: Subcategory::TechnicalRobustness,
        issue_class: IssueClass::Missing,
        severity: Severity::High,
        external_ref: Some("WCAG 4.1.2"),
        external_level: Some("A"),
        axe_id: None,
        title: "Fehlende Name/Rolle bei Bedienelementen",
        title_en: "Missing name/role on controls",
        description: "Interaktive Elemente ohne zugänglichen Namen oder erkennbare Rolle.",
        user_impact: "Screenreader kann Funktion nicht vermitteln.",
        user_impact_en: "Screen readers cannot convey the function.",
        technical_impact: "Fehlende ARIA-Labels und -Rollen.",
        technical_impact_en: "Missing ARIA labels and roles.",
        score_impact: ScoreImpact {
            base_penalty: 5.0,
            max_penalty: 12.0,
            occurrence_scaling: Scaling::Logarithmic,
        },
        report_visibility: VIS_ALL,
    },
    Rule {
        id: "a11y.modern_attributes.invalid",
        dimension: Dimension::Accessibility,
        subcategory: Subcategory::TechnicalRobustness,
        issue_class: IssueClass::Invalid,
        severity: Severity::High,
        external_ref: Some("WCAG 4.1.2"),
        external_level: Some("A"),
        axe_id: Some("modern-attribute-misuse"),
        title: "Ungültige moderne Interaktionsattribute",
        title_en: "Invalid modern interaction attributes",
        description: "popover-, inert- oder Dialog-Attribute erzeugen eine nicht programmatisch bestimmbare Interaktion.",
        user_impact: "Screenreader- und Tastaturnutzer erreichen Dialoge, Popover oder gesperrte Bereiche nicht zuverlässig.",
        user_impact_en: "Screen reader and keyboard users cannot reliably access dialogs, popovers, or disabled regions.",
        technical_impact: "Defekte popovertarget-Bezüge, unbenannte Oberflächen oder aktiver Fokus innerhalb inert markierter Bereiche.",
        technical_impact_en: "Broken popovertarget references, unnamed surfaces, or active focus inside inert regions.",
        score_impact: ScoreImpact {
            base_penalty: 4.0,
            max_penalty: 10.0,
            occurrence_scaling: Scaling::Logarithmic,
        },
        report_visibility: VIS_ALL,
    },
    Rule {
        id: "a11y.aria_prohibited_attr.invalid",
        dimension: Dimension::Accessibility,
        subcategory: Subcategory::TechnicalRobustness,
        issue_class: IssueClass::Invalid,
        severity: Severity::High,
        external_ref: Some("WCAG 4.1.2"),
        external_level: Some("A"),
        axe_id: Some("aria-prohibited-attr"),
        title: "Verbotene ARIA-Attribute",
        title_en: "Prohibited ARIA attributes",
        description: "ARIA-Attribute werden auf einer Rolle verwendet, die sie nicht erlaubt.",
        user_impact: "Screenreader erhalten widersprüchliche oder ungültige Semantik.",
        user_impact_en: "Screen readers receive contradictory or invalid semantics.",
        technical_impact: "ARIA-Attribute passen nicht zur impliziten oder expliziten Rolle.",
        technical_impact_en: "ARIA attributes do not match the implicit or explicit role.",
        score_impact: ScoreImpact {
            base_penalty: 4.0,
            max_penalty: 10.0,
            occurrence_scaling: Scaling::Logarithmic,
        },
        report_visibility: VIS_ALL,
    },
    Rule {
        id: "a11y.frame_title.missing",
        dimension: Dimension::Accessibility,
        subcategory: Subcategory::ContentAlternatives,
        issue_class: IssueClass::Missing,
        severity: Severity::High,
        external_ref: Some("WCAG 2.4.1"),
        external_level: Some("A"),
        axe_id: Some("frame-title"),
        title: "Iframe ohne zugänglichen Namen",
        title_en: "Iframe without accessible name",
        description: "Iframe oder Frame hat keinen title, aria-label oder aria-labelledby.",
        user_impact: "Screenreader-Nutzer erkennen Zweck und Inhalt des eingebetteten Frames nicht.",
        user_impact_en: "Screen reader users cannot identify the purpose and content of the embedded frame.",
        technical_impact: "Fehlender zugänglicher Name auf iframe/frame.",
        technical_impact_en: "Missing accessible name on iframe/frame.",
        score_impact: ScoreImpact {
            base_penalty: 4.0,
            max_penalty: 10.0,
            occurrence_scaling: Scaling::Logarithmic,
        },
        report_visibility: VIS_ALL,
    },
    Rule {
        id: "a11y.frame_tested.cross_origin",
        dimension: Dimension::Accessibility,
        subcategory: Subcategory::TechnicalRobustness,
        issue_class: IssueClass::Informational,
        severity: Severity::Medium,
        external_ref: Some("WCAG 4.1.2"),
        external_level: Some("A"),
        axe_id: Some("frame-tested"),
        title: "Cross-origin Iframe: manuell prüfen",
        title_en: "Cross-origin iframe: review manually",
        description: "Cross-origin iframes können nicht automatisch auf Barrierefreiheit geprüft werden.",
        user_impact: "Eingebettete Inhalte (Karten, Videos, Consent-Widgets) sind möglicherweise für Screenreader-Nutzer unzugänglich.",
        user_impact_en: "Embedded content (maps, videos, consent widgets) may be inaccessible to screen reader users.",
        technical_impact: "Iframe-Inhalt ist über CDP nicht erreichbar — automatische Regelprüfung nicht möglich.",
        technical_impact_en: "Iframe content is unreachable via CDP — automatic rule checking is not possible.",
        score_impact: ScoreImpact {
            base_penalty: 0.0,
            max_penalty: 0.0,
            occurrence_scaling: Scaling::Linear,
        },
        report_visibility: VIS_ALL,
    },
    Rule {
        id: "a11y.parsing.invalid",
        dimension: Dimension::Accessibility,
        subcategory: Subcategory::TechnicalRobustness,
        issue_class: IssueClass::Invalid,
        severity: Severity::Critical,
        external_ref: Some("WCAG 4.1.1"),
        external_level: Some("A"),
        axe_id: Some("duplicate-id"),
        title: "Fehlerhaftes Markup (Parsing)",
        title_en: "Malformed markup (parsing)",
        description: "HTML-Code weist schwerwiegende Syntaxfehler auf, wie z. B. doppelte IDs.",
        user_impact: "Screenreader können den AX-Tree nicht korrekt aufbauen und überspringen Elemente.",
        user_impact_en: "Screen readers cannot build the accessibility tree correctly and skip elements.",
        technical_impact: "Doppelte IDs in der DOM-Struktur oder unvollständige HTML-Tags.",
        technical_impact_en: "Duplicate IDs in the DOM structure or incomplete HTML tags.",
        score_impact: ScoreImpact {
            base_penalty: 5.0,
            max_penalty: 15.0,
            occurrence_scaling: Scaling::Logarithmic,
        },
        report_visibility: VIS_ALL,
    },
    // ═══════════════════════════════════════════════════════════════════════════
    // PERFORMANCE
    // ═══════════════════════════════════════════════════════════════════════════
    Rule {
        id: "perf.lcp.slow",
        dimension: Dimension::Performance,
        subcategory: Subcategory::LoadBehavior,
        issue_class: IssueClass::Weak,
        severity: Severity::High,
        external_ref: Some("CWV:LCP"),
        external_level: None,
        axe_id: None,
        title: "Langsamer Largest Contentful Paint",
        title_en: "Slow Largest Contentful Paint",
        description: "Hauptinhalt wird zu spät sichtbar.",
        user_impact: "Nutzer sieht lange leere oder unvollständige Seite.",
        user_impact_en: "Users see a blank or incomplete page for a long time.",
        technical_impact: "LCP über 2500ms — Netzwerk, Rendering oder Ressourcen zu langsam.",
        technical_impact_en: "LCP above 2500ms — network, rendering or resources too slow.",
        score_impact: ScoreImpact {
            base_penalty: 25.0,
            max_penalty: 25.0,
            occurrence_scaling: Scaling::Fixed,
        },
        report_visibility: VIS_ALL,
    },
    Rule {
        id: "perf.fcp.slow",
        dimension: Dimension::Performance,
        subcategory: Subcategory::LoadBehavior,
        issue_class: IssueClass::Weak,
        severity: Severity::Medium,
        external_ref: Some("CWV:FCP"),
        external_level: None,
        axe_id: None,
        title: "Langsamer First Contentful Paint",
        title_en: "Slow First Contentful Paint",
        description: "Erster sichtbarer Inhalt erscheint zu spät.",
        user_impact: "Nutzer wartet zu lange auf erste Rückmeldung.",
        user_impact_en: "Users wait too long for the first feedback.",
        technical_impact: "FCP über 1800ms — Server oder Rendering-Blockade.",
        technical_impact_en: "FCP above 1800ms — server or rendering blockage.",
        score_impact: ScoreImpact {
            base_penalty: 25.0,
            max_penalty: 25.0,
            occurrence_scaling: Scaling::Fixed,
        },
        report_visibility: VIS_ALL,
    },
    Rule {
        id: "perf.cls.unstable",
        dimension: Dimension::Performance,
        subcategory: Subcategory::VisualStability,
        issue_class: IssueClass::Weak,
        severity: Severity::Medium,
        external_ref: Some("CWV:CLS"),
        external_level: None,
        axe_id: None,
        title: "Layout-Verschiebungen während des Ladens",
        title_en: "Layout shifts during loading",
        description: "Seitenelemente springen während des Ladens.",
        user_impact: "Nutzer klickt versehentlich auf falsches Element.",
        user_impact_en: "Users accidentally click the wrong element.",
        technical_impact: "CLS über 0.1 — fehlende Dimensionen, nachladende Inhalte.",
        technical_impact_en: "CLS above 0.1 — missing dimensions, late-loading content.",
        score_impact: ScoreImpact {
            base_penalty: 25.0,
            max_penalty: 25.0,
            occurrence_scaling: Scaling::Fixed,
        },
        report_visibility: VIS_ALL,
    },
    Rule {
        id: "perf.tbt.high",
        dimension: Dimension::Performance,
        subcategory: Subcategory::Interactivity,
        issue_class: IssueClass::Weak,
        severity: Severity::High,
        external_ref: Some("CWV:TBT"),
        external_level: None,
        axe_id: None,
        title: "Hohe Blocking-Zeit",
        title_en: "High blocking time",
        description: "Hauptthread blockiert zu lange durch JavaScript.",
        user_impact: "Seite reagiert verzögert auf Nutzereingaben.",
        user_impact_en: "The page responds to user input with delay.",
        technical_impact: "TBT/INP über 200ms — zu viel JavaScript-Arbeit im Hauptthread.",
        technical_impact_en: "TBT/INP above 200ms — too much JavaScript work on the main thread.",
        score_impact: ScoreImpact {
            base_penalty: 25.0,
            max_penalty: 25.0,
            occurrence_scaling: Scaling::Fixed,
        },
        report_visibility: VIS_ALL,
    },
    Rule {
        id: "perf.ttfb.slow",
        dimension: Dimension::Performance,
        subcategory: Subcategory::LoadBehavior,
        issue_class: IssueClass::Risk,
        severity: Severity::Medium,
        external_ref: Some("CWV:TTFB"),
        external_level: None,
        axe_id: None,
        title: "Langsame Server-Antwortzeit",
        title_en: "Slow server response time",
        description: "Server reagiert zu langsam auf die Anfrage.",
        user_impact: "Gesamte Ladezeit wird verzögert.",
        user_impact_en: "The overall load time is delayed.",
        technical_impact: "TTFB über 800ms — Server-Performance oder Netzwerk-Latenz.",
        technical_impact_en: "TTFB above 800ms — server performance or network latency.",
        score_impact: ScoreImpact {
            base_penalty: 5.0,
            max_penalty: 10.0,
            occurrence_scaling: Scaling::Fixed,
        },
        report_visibility: VIS_STANDARD,
    },
    Rule {
        id: "perf.resources.heavy",
        dimension: Dimension::Performance,
        subcategory: Subcategory::ResourceUsage,
        issue_class: IssueClass::Risk,
        severity: Severity::Medium,
        external_ref: None,
        external_level: None,
        axe_id: None,
        title: "Hoher Ressourcenverbrauch",
        title_en: "High resource consumption",
        description: "Seite lädt zu viele oder zu große Ressourcen.",
        user_impact: "Langsame Ladezeiten, hoher Datenverbrauch auf Mobilgeräten.",
        user_impact_en: "Slow load times, high data usage on mobile devices.",
        technical_impact: "Gesamtgröße > 3MB, zu viele Requests, unkomprimiert.",
        technical_impact_en: "Total size > 3MB, too many requests, uncompressed.",
        score_impact: ScoreImpact {
            base_penalty: 5.0,
            max_penalty: 10.0,
            occurrence_scaling: Scaling::Fixed,
        },
        report_visibility: VIS_STANDARD,
    },
    Rule {
        id: "perf.dom.large",
        dimension: Dimension::Performance,
        subcategory: Subcategory::TechnicalComplexity,
        issue_class: IssueClass::Risk,
        severity: Severity::Low,
        external_ref: None,
        external_level: None,
        axe_id: None,
        title: "Großes DOM",
        title_en: "Large DOM",
        description: "Übermäßig viele DOM-Elemente.",
        user_impact: "Seite reagiert langsam auf Interaktionen.",
        user_impact_en: "The page responds slowly to interactions.",
        technical_impact: "DOM-Größe belastet Browser-Rendering und Speicher.",
        technical_impact_en: "DOM size burdens browser rendering and memory.",
        score_impact: ScoreImpact {
            base_penalty: 3.0,
            max_penalty: 5.0,
            occurrence_scaling: Scaling::Fixed,
        },
        report_visibility: VIS_TECHNICAL,
    },
    // ═══════════════════════════════════════════════════════════════════════════
    // SEO
    // ═══════════════════════════════════════════════════════════════════════════
    Rule {
        id: "seo.title.missing",
        dimension: Dimension::Seo,
        subcategory: Subcategory::SnippetMetadata,
        issue_class: IssueClass::Missing,
        severity: Severity::Critical,
        external_ref: None,
        external_level: None,
        axe_id: None,
        title: "Fehlender Seitentitel",
        title_en: "Missing page title",
        description: "Kein <title>-Tag vorhanden.",
        user_impact: "Seite wird in Suchergebnissen ohne aussagekräftigen Titel angezeigt.",
        user_impact_en: "The page appears in search results without a meaningful title.",
        technical_impact: "Leeres oder fehlendes <title>-Element.",
        technical_impact_en: "Empty or missing <title> element.",
        score_impact: ScoreImpact {
            base_penalty: 10.0,
            max_penalty: 10.0,
            occurrence_scaling: Scaling::Fixed,
        },
        report_visibility: VIS_ALL,
    },
    Rule {
        id: "seo.title.weak",
        dimension: Dimension::Seo,
        subcategory: Subcategory::SnippetMetadata,
        issue_class: IssueClass::Weak,
        severity: Severity::Medium,
        external_ref: None,
        external_level: None,
        axe_id: None,
        title: "Ungünstige Titellänge",
        title_en: "Suboptimal title length",
        description: "Titel zu kurz (<30 Zeichen) oder zu lang (>60 Zeichen).",
        user_impact: "Snippet wird in Suchergebnissen suboptimal dargestellt.",
        user_impact_en: "The snippet is displayed suboptimally in search results.",
        technical_impact: "Title-Tag außerhalb des empfohlenen Zeichenbereichs.",
        technical_impact_en: "Title tag outside the recommended character range.",
        score_impact: ScoreImpact {
            base_penalty: 5.0,
            max_penalty: 5.0,
            occurrence_scaling: Scaling::Fixed,
        },
        report_visibility: VIS_STANDARD,
    },
    Rule {
        id: "seo.description.missing",
        dimension: Dimension::Seo,
        subcategory: Subcategory::SnippetMetadata,
        issue_class: IssueClass::Missing,
        severity: Severity::High,
        external_ref: None,
        external_level: None,
        axe_id: None,
        title: "Fehlende Meta-Description",
        title_en: "Missing meta description",
        description: "Keine Meta-Description vorhanden.",
        user_impact: "Suchmaschine generiert eigene Beschreibung, oft suboptimal.",
        user_impact_en: "The search engine generates its own description, often suboptimal.",
        technical_impact: "Fehlendes <meta name=\"description\">-Element.",
        technical_impact_en: "Missing <meta name=\"description\"> element.",
        score_impact: ScoreImpact {
            base_penalty: 10.0,
            max_penalty: 10.0,
            occurrence_scaling: Scaling::Fixed,
        },
        report_visibility: VIS_ALL,
    },
    Rule {
        id: "seo.description.weak",
        dimension: Dimension::Seo,
        subcategory: Subcategory::SnippetMetadata,
        issue_class: IssueClass::Weak,
        severity: Severity::Low,
        external_ref: None,
        external_level: None,
        axe_id: None,
        title: "Ungünstige Description-Länge",
        title_en: "Suboptimal description length",
        description: "Meta-Description zu kurz (<120) oder zu lang (>160 Zeichen).",
        user_impact: "Snippet wird abgeschnitten oder ist zu knapp.",
        user_impact_en: "The snippet is truncated or too brief.",
        technical_impact: "Description außerhalb des empfohlenen Zeichenbereichs.",
        technical_impact_en: "Description outside the recommended character range.",
        score_impact: ScoreImpact {
            base_penalty: 5.0,
            max_penalty: 5.0,
            occurrence_scaling: Scaling::Fixed,
        },
        report_visibility: VIS_STANDARD,
    },
    Rule {
        id: "seo.viewport.missing",
        dimension: Dimension::Seo,
        subcategory: Subcategory::SnippetMetadata,
        issue_class: IssueClass::Missing,
        severity: Severity::High,
        external_ref: None,
        external_level: None,
        axe_id: None,
        title: "Fehlende Viewport-Meta-Tag",
        title_en: "Missing viewport meta tag",
        description: "Kein Viewport-Meta-Tag vorhanden.",
        user_impact: "Seite wird auf Mobilgeräten nicht korrekt dargestellt.",
        user_impact_en: "The page is not rendered correctly on mobile devices.",
        technical_impact: "Fehlendes <meta name=\"viewport\">-Element.",
        technical_impact_en: "Missing <meta name=\"viewport\"> element.",
        score_impact: ScoreImpact {
            base_penalty: 10.0,
            max_penalty: 10.0,
            occurrence_scaling: Scaling::Fixed,
        },
        report_visibility: VIS_ALL,
    },
    Rule {
        id: "seo.h1.missing",
        dimension: Dimension::Seo,
        subcategory: Subcategory::ContentStructure,
        issue_class: IssueClass::Missing,
        severity: Severity::High,
        external_ref: None,
        external_level: None,
        axe_id: None,
        title: "Fehlende H1-Überschrift",
        title_en: "Missing H1 heading",
        description: "Seite hat keine H1-Überschrift.",
        user_impact: "Suchmaschine kann Hauptthema der Seite schlechter erkennen.",
        user_impact_en: "Search engines can less easily identify the main topic of the page.",
        technical_impact: "Kein <h1>-Element vorhanden.",
        technical_impact_en: "No <h1> element present.",
        score_impact: ScoreImpact {
            base_penalty: 15.0,
            max_penalty: 15.0,
            occurrence_scaling: Scaling::Fixed,
        },
        report_visibility: VIS_ALL,
    },
    Rule {
        id: "seo.h1.multiple",
        dimension: Dimension::Seo,
        subcategory: Subcategory::ContentStructure,
        issue_class: IssueClass::Weak,
        severity: Severity::Low,
        external_ref: None,
        external_level: None,
        axe_id: None,
        title: "Mehrere H1-Überschriften",
        title_en: "Multiple H1 headings",
        description: "Seite hat mehr als eine H1-Überschrift.",
        user_impact: "Thematische Fokussierung der Seite unklar.",
        user_impact_en: "The thematic focus of the page is unclear.",
        technical_impact: "Mehrere <h1>-Elemente im DOM.",
        technical_impact_en: "Multiple <h1> elements in the DOM.",
        score_impact: ScoreImpact {
            base_penalty: 5.0,
            max_penalty: 5.0,
            occurrence_scaling: Scaling::Fixed,
        },
        report_visibility: VIS_STANDARD,
    },
    Rule {
        id: "seo.headings.issue",
        dimension: Dimension::Seo,
        subcategory: Subcategory::ContentStructure,
        issue_class: IssueClass::Weak,
        severity: Severity::Low,
        external_ref: None,
        external_level: None,
        axe_id: None,
        title: "Heading-Probleme",
        title_en: "Heading issues",
        description: "Übersprungene Ebenen, leere Headings oder zu lange Headings.",
        user_impact: "Strukturelle Signale für Suchmaschine geschwächt.",
        user_impact_en: "Structural signals for search engines are weakened.",
        technical_impact: "Heading-Hierarchie nicht korrekt.",
        technical_impact_en: "Heading hierarchy is not correct.",
        score_impact: ScoreImpact {
            base_penalty: 3.0,
            max_penalty: 9.0,
            occurrence_scaling: Scaling::Linear,
        },
        report_visibility: VIS_STANDARD,
    },
    Rule {
        id: "seo.canonical.missing",
        dimension: Dimension::Seo,
        subcategory: Subcategory::Indexability,
        issue_class: IssueClass::Opportunity,
        severity: Severity::Low,
        external_ref: None,
        external_level: None,
        axe_id: None,
        title: "Fehlende Canonical-URL",
        title_en: "Missing canonical URL",
        description: "Kein Canonical-Link vorhanden.",
        user_impact: "Mögliche Duplicate-Content-Probleme.",
        user_impact_en: "Possible duplicate content issues.",
        technical_impact: "Fehlendes <link rel=\"canonical\">-Element.",
        technical_impact_en: "Missing <link rel=\"canonical\"> element.",
        score_impact: ScoreImpact {
            base_penalty: 5.0,
            max_penalty: 5.0,
            occurrence_scaling: Scaling::Fixed,
        },
        report_visibility: VIS_STANDARD,
    },
    Rule {
        id: "seo.lang.missing",
        dimension: Dimension::Seo,
        subcategory: Subcategory::SemanticSignals,
        issue_class: IssueClass::Missing,
        severity: Severity::Medium,
        external_ref: None,
        external_level: None,
        axe_id: None,
        title: "Fehlende Sprachangabe",
        title_en: "Missing language declaration",
        description: "Kein lang-Attribut im HTML-Tag.",
        user_impact: "Suchmaschine kann Sprache nicht automatisch zuordnen.",
        user_impact_en: "Search engines cannot automatically assign the language.",
        technical_impact: "Fehlendes lang-Attribut im <html>-Element.",
        technical_impact_en: "Missing lang attribute on the <html> element.",
        score_impact: ScoreImpact {
            base_penalty: 3.0,
            max_penalty: 3.0,
            occurrence_scaling: Scaling::Fixed,
        },
        report_visibility: VIS_STANDARD,
    },
    Rule {
        id: "seo.og.missing",
        dimension: Dimension::Seo,
        subcategory: Subcategory::SemanticSignals,
        issue_class: IssueClass::Opportunity,
        severity: Severity::Low,
        external_ref: None,
        external_level: None,
        axe_id: None,
        title: "Fehlende Open Graph Tags",
        title_en: "Missing Open Graph tags",
        description: "Keine Open Graph Meta-Tags vorhanden.",
        user_impact: "Social-Media-Vorschau der Seite ist unformatiert.",
        user_impact_en: "The social media preview of the page is unformatted.",
        technical_impact: "Fehlende og:-Meta-Tags.",
        technical_impact_en: "Missing og: meta tags.",
        score_impact: ScoreImpact {
            base_penalty: 5.0,
            max_penalty: 5.0,
            occurrence_scaling: Scaling::Fixed,
        },
        report_visibility: VIS_STANDARD,
    },
    Rule {
        id: "seo.twitter.missing",
        dimension: Dimension::Seo,
        subcategory: Subcategory::SemanticSignals,
        issue_class: IssueClass::Opportunity,
        severity: Severity::Low,
        external_ref: None,
        external_level: None,
        axe_id: None,
        title: "Fehlende Twitter Card Tags",
        title_en: "Missing Twitter Card tags",
        description: "Keine Twitter Card Meta-Tags vorhanden.",
        user_impact: "Twitter-Vorschau der Seite ist unformatiert.",
        user_impact_en: "The Twitter preview of the page is unformatted.",
        technical_impact: "Fehlende twitter:-Meta-Tags.",
        technical_impact_en: "Missing twitter: meta tags.",
        score_impact: ScoreImpact {
            base_penalty: 5.0,
            max_penalty: 5.0,
            occurrence_scaling: Scaling::Fixed,
        },
        report_visibility: VIS_TECHNICAL,
    },
    Rule {
        id: "seo.https.missing",
        dimension: Dimension::Seo,
        subcategory: Subcategory::Indexability,
        issue_class: IssueClass::Missing,
        severity: Severity::Critical,
        external_ref: None,
        external_level: None,
        axe_id: None,
        title: "Kein HTTPS",
        title_en: "No HTTPS",
        description: "Seite wird nicht über HTTPS ausgeliefert.",
        user_impact: "Browser zeigt Sicherheitswarnung, Ranking-Nachteil.",
        user_impact_en: "The browser shows a security warning; ranking disadvantage.",
        technical_impact: "Fehlende TLS-Verschlüsselung.",
        technical_impact_en: "Missing TLS encryption.",
        score_impact: ScoreImpact {
            base_penalty: 10.0,
            max_penalty: 10.0,
            occurrence_scaling: Scaling::Fixed,
        },
        report_visibility: VIS_ALL,
    },
    // ═══════════════════════════════════════════════════════════════════════════
    // SECURITY
    // ═══════════════════════════════════════════════════════════════════════════
    Rule {
        id: "sec.https.missing",
        dimension: Dimension::Security,
        subcategory: Subcategory::Transport,
        issue_class: IssueClass::Missing,
        severity: Severity::Critical,
        external_ref: None,
        external_level: None,
        axe_id: None,
        title: "Kein HTTPS",
        title_en: "No HTTPS",
        description: "Seite wird nicht über HTTPS ausgeliefert.",
        user_impact: "Daten werden unverschlüsselt übertragen.",
        user_impact_en: "Data is transmitted unencrypted.",
        technical_impact: "Fehlende TLS-Verschlüsselung.",
        technical_impact_en: "Missing TLS encryption.",
        score_impact: ScoreImpact {
            base_penalty: 25.0,
            max_penalty: 25.0,
            occurrence_scaling: Scaling::Fixed,
        },
        report_visibility: VIS_ALL,
    },
    Rule {
        id: "sec.hsts.missing",
        dimension: Dimension::Security,
        subcategory: Subcategory::Headers,
        issue_class: IssueClass::Missing,
        severity: Severity::High,
        external_ref: None,
        external_level: None,
        axe_id: None,
        title: "HSTS Header fehlt",
        title_en: "HSTS header missing",
        description: "Strict-Transport-Security Header nicht gesetzt.",
        user_impact: "Downgrade-Angriffe auf HTTP möglich.",
        user_impact_en: "Downgrade attacks to HTTP are possible.",
        technical_impact: "Fehlender HSTS-Header.",
        technical_impact_en: "Missing HSTS header.",
        score_impact: ScoreImpact {
            base_penalty: 15.0,
            max_penalty: 15.0,
            occurrence_scaling: Scaling::Fixed,
        },
        report_visibility: VIS_ALL,
    },
    Rule {
        id: "sec.csp.missing",
        dimension: Dimension::Security,
        subcategory: Subcategory::Headers,
        issue_class: IssueClass::Missing,
        severity: Severity::High,
        external_ref: None,
        external_level: None,
        axe_id: None,
        title: "Content Security Policy fehlt",
        title_en: "Content Security Policy missing",
        description: "Kein Content-Security-Policy Header gesetzt.",
        user_impact: "Erhöhtes Risiko für XSS-Angriffe.",
        user_impact_en: "Increased risk of XSS attacks.",
        technical_impact: "Fehlender CSP-Header.",
        technical_impact_en: "Missing CSP header.",
        score_impact: ScoreImpact {
            base_penalty: 15.0,
            max_penalty: 15.0,
            occurrence_scaling: Scaling::Fixed,
        },
        report_visibility: VIS_ALL,
    },
    Rule {
        id: "sec.xcto.missing",
        dimension: Dimension::Security,
        subcategory: Subcategory::BrowserProtection,
        issue_class: IssueClass::Missing,
        severity: Severity::Medium,
        external_ref: None,
        external_level: None,
        axe_id: None,
        title: "X-Content-Type-Options Header fehlt",
        title_en: "X-Content-Type-Options header missing",
        description: "Browser kann MIME-Typ-Sniffing durchführen.",
        user_impact: "Potenzielle Sicherheitslücke durch falsche MIME-Typen.",
        user_impact_en: "Potential security gap through incorrect MIME types.",
        technical_impact: "Fehlender X-Content-Type-Options: nosniff Header.",
        technical_impact_en: "Missing X-Content-Type-Options: nosniff header.",
        score_impact: ScoreImpact {
            base_penalty: 10.0,
            max_penalty: 10.0,
            occurrence_scaling: Scaling::Fixed,
        },
        report_visibility: VIS_STANDARD,
    },
    Rule {
        id: "sec.xfo.missing",
        dimension: Dimension::Security,
        subcategory: Subcategory::BrowserProtection,
        issue_class: IssueClass::Missing,
        severity: Severity::Medium,
        external_ref: None,
        external_level: None,
        axe_id: None,
        title: "X-Frame-Options Header fehlt",
        title_en: "X-Frame-Options header missing",
        description: "Seite kann in fremden iframes eingebettet werden.",
        user_impact: "Clickjacking-Angriffe möglich.",
        user_impact_en: "Clickjacking attacks are possible.",
        technical_impact: "Fehlender X-Frame-Options Header.",
        technical_impact_en: "Missing X-Frame-Options header.",
        score_impact: ScoreImpact {
            base_penalty: 10.0,
            max_penalty: 10.0,
            occurrence_scaling: Scaling::Fixed,
        },
        report_visibility: VIS_STANDARD,
    },
    Rule {
        id: "sec.referrer.missing",
        dimension: Dimension::Security,
        subcategory: Subcategory::BrowserProtection,
        issue_class: IssueClass::Missing,
        severity: Severity::Low,
        external_ref: None,
        external_level: None,
        axe_id: None,
        title: "Referrer-Policy Header fehlt",
        title_en: "Referrer-Policy header missing",
        description: "Keine Kontrolle über Referrer-Informationen.",
        user_impact: "Private URLs können an Dritte weitergegeben werden.",
        user_impact_en: "Private URLs may be passed on to third parties.",
        technical_impact: "Fehlender Referrer-Policy Header.",
        technical_impact_en: "Missing Referrer-Policy header.",
        score_impact: ScoreImpact {
            base_penalty: 5.0,
            max_penalty: 5.0,
            occurrence_scaling: Scaling::Fixed,
        },
        report_visibility: VIS_TECHNICAL,
    },
    // ═══════════════════════════════════════════════════════════════════════════
    // MOBILE
    // ═══════════════════════════════════════════════════════════════════════════
    Rule {
        id: "mob.viewport.missing",
        dimension: Dimension::Mobile,
        subcategory: Subcategory::Viewport,
        issue_class: IssueClass::Missing,
        severity: Severity::Critical,
        external_ref: None,
        external_level: None,
        axe_id: None,
        title: "Fehlende Viewport-Konfiguration",
        title_en: "Missing viewport configuration",
        description: "Kein Viewport-Meta-Tag vorhanden.",
        user_impact: "Seite wird auf Mobilgeräten nicht korrekt dargestellt.",
        user_impact_en: "The page is not rendered correctly on mobile devices.",
        technical_impact: "Fehlendes <meta name=\"viewport\">-Element.",
        technical_impact_en: "Missing <meta name=\"viewport\"> element.",
        score_impact: ScoreImpact {
            base_penalty: 20.0,
            max_penalty: 20.0,
            occurrence_scaling: Scaling::Fixed,
        },
        report_visibility: VIS_ALL,
    },
    Rule {
        id: "mob.viewport.improper",
        dimension: Dimension::Mobile,
        subcategory: Subcategory::Viewport,
        issue_class: IssueClass::Weak,
        severity: Severity::Medium,
        external_ref: None,
        external_level: None,
        axe_id: None,
        title: "Unvollständige Viewport-Konfiguration",
        title_en: "Incomplete viewport configuration",
        description: "Viewport-Tag fehlt width=device-width oder initial-scale=1.",
        user_impact: "Seite wird möglicherweise nicht optimal skaliert.",
        user_impact_en: "The page may not scale optimally.",
        technical_impact: "Viewport-Meta-Tag mit unvollständiger Konfiguration.",
        technical_impact_en: "Viewport meta tag with incomplete configuration.",
        score_impact: ScoreImpact {
            base_penalty: 10.0,
            max_penalty: 10.0,
            occurrence_scaling: Scaling::Fixed,
        },
        report_visibility: VIS_STANDARD,
    },
    Rule {
        id: "mob.zoom.disabled",
        dimension: Dimension::Mobile,
        subcategory: Subcategory::Viewport,
        issue_class: IssueClass::Risk,
        severity: Severity::Critical,
        external_ref: None,
        external_level: None,
        axe_id: None,
        title: "Zoom deaktiviert",
        title_en: "Zoom disabled",
        description: "user-scalable=no verhindert das Zoomen.",
        user_impact: "Nutzer mit Sehschwäche können Inhalte nicht vergrößern.",
        user_impact_en: "Users with low vision cannot enlarge content.",
        technical_impact: "Viewport-Meta mit user-scalable=no.",
        technical_impact_en: "Viewport meta with user-scalable=no.",
        score_impact: ScoreImpact {
            base_penalty: 20.0,
            max_penalty: 20.0,
            occurrence_scaling: Scaling::Fixed,
        },
        report_visibility: VIS_ALL,
    },
    Rule {
        id: "mob.touch_targets.small",
        dimension: Dimension::Mobile,
        subcategory: Subcategory::TouchUsability,
        issue_class: IssueClass::Weak,
        severity: Severity::Medium,
        external_ref: None,
        external_level: None,
        axe_id: None,
        title: "Zu kleine Touch-Targets",
        title_en: "Touch targets too small",
        description: "Interaktive Elemente kleiner als 44x44 Pixel.",
        user_impact: "Schwer bedienbar auf Touchscreens.",
        user_impact_en: "Hard to operate on touchscreens.",
        technical_impact: "Bounding Box unter 44x44px.",
        technical_impact_en: "Bounding box below 44x44px.",
        score_impact: ScoreImpact {
            base_penalty: 10.0,
            max_penalty: 10.0,
            occurrence_scaling: Scaling::Fixed,
        },
        report_visibility: VIS_STANDARD,
    },
    Rule {
        id: "mob.fonts.small",
        dimension: Dimension::Mobile,
        subcategory: Subcategory::Readability,
        issue_class: IssueClass::Weak,
        severity: Severity::Medium,
        external_ref: None,
        external_level: None,
        axe_id: None,
        title: "Zu kleine Schriftgröße",
        title_en: "Font size too small",
        description: "Kleinste Schriftgröße unter 12px.",
        user_impact: "Text auf Mobilgeräten schwer lesbar.",
        user_impact_en: "Text is hard to read on mobile devices.",
        technical_impact: "Font-size unter 12px detektiert.",
        technical_impact_en: "Font size below 12px detected.",
        score_impact: ScoreImpact {
            base_penalty: 10.0,
            max_penalty: 10.0,
            occurrence_scaling: Scaling::Fixed,
        },
        report_visibility: VIS_STANDARD,
    },
    Rule {
        id: "mob.horizontal_scroll",
        dimension: Dimension::Mobile,
        subcategory: Subcategory::ResponsiveLayout,
        issue_class: IssueClass::Weak,
        severity: Severity::High,
        external_ref: None,
        external_level: None,
        axe_id: None,
        title: "Horizontales Scrollen erforderlich",
        title_en: "Horizontal scrolling required",
        description: "Seite ist breiter als der Viewport.",
        user_impact: "Nutzer muss horizontal scrollen, Inhalte abgeschnitten.",
        user_impact_en: "Users must scroll horizontally; content is cut off.",
        technical_impact: "scrollWidth > innerWidth.",
        technical_impact_en: "scrollWidth > innerWidth.",
        score_impact: ScoreImpact {
            base_penalty: 20.0,
            max_penalty: 20.0,
            occurrence_scaling: Scaling::Fixed,
        },
        report_visibility: VIS_ALL,
    },
];

#[cfg(test)]
mod tests {
    use super::*;

    #[test]
    fn test_rule_lookup_by_id() {
        let rule = RuleLookup::by_id("a11y.alt_text.missing");
        assert!(rule.is_some());
        let rule = rule.unwrap();
        assert_eq!(rule.dimension, Dimension::Accessibility);
        assert_eq!(rule.severity, Severity::High);
    }

    #[test]
    fn test_legacy_wcag_lookup() {
        let rule = RuleLookup::by_legacy_wcag_id("1.1.1");
        assert!(rule.is_some());
        assert_eq!(rule.unwrap().id, "a11y.alt_text.missing");
    }

    #[test]
    fn test_frame_title_taxonomy_uses_wcag_241() {
        let rule = RuleLookup::by_legacy_wcag_id("frame-title")
            .expect("frame-title axe id should resolve");
        assert_eq!(rule.id, "a11y.frame_title.missing");
        assert_eq!(rule.external_ref, Some("WCAG 2.4.1"));
        assert_eq!(rule.axe_id, Some("frame-title"));
    }

    #[test]
    fn test_dom_parity_rules_resolve_to_specific_taxonomy() {
        let form =
            RuleLookup::by_legacy_wcag_id("form-no-submit").expect("form-no-submit should resolve");
        assert_eq!(form.id, "a11y.form_no_submit.missing");
        assert_eq!(form.external_ref, Some("WCAG 3.2.2"));

        let presentation = RuleLookup::by_legacy_wcag_id("presentation-semantic-children")
            .expect("presentation-semantic-children should resolve");
        assert_eq!(
            presentation.id,
            "a11y.presentation_semantic_children.invalid"
        );
        assert_eq!(presentation.external_ref, Some("WCAG 1.3.1"));

        let landmark_main = RuleLookup::by_legacy_wcag_id("landmark-main-present")
            .expect("landmark-main-present should resolve");
        assert_eq!(landmark_main.id, "a11y.landmark_main.missing");
        assert_eq!(landmark_main.external_ref, Some("WCAG 1.3.1"));

        let landmark_unique = RuleLookup::by_legacy_wcag_id("landmark-unique")
            .expect("landmark-unique should resolve");
        assert_eq!(landmark_unique.id, "a11y.landmark_unique.invalid");
        assert_eq!(landmark_unique.external_ref, Some("WCAG 1.3.1"));

        let modern = RuleLookup::by_legacy_wcag_id("modern-attribute-misuse")
            .expect("modern-attribute-misuse should resolve");
        assert_eq!(modern.id, "a11y.modern_attributes.invalid");
        assert_eq!(modern.external_ref, Some("WCAG 4.1.2"));
        assert_eq!(modern.axe_id, Some("modern-attribute-misuse"));
    }

    #[test]
    fn test_all_rules_have_dimension() {
        for rule in RULES {
            assert!(
                rule.subcategory.dimension() == rule.dimension,
                "Rule {} has subcategory {:?} which belongs to {:?}, not {:?}",
                rule.id,
                rule.subcategory,
                rule.subcategory.dimension(),
                rule.dimension
            );
        }
    }

    #[test]
    fn test_all_legacy_wcag_ids_resolve() {
        for (wcag_id, rule_id) in LEGACY_WCAG_MAP {
            assert!(
                RuleLookup::by_id(rule_id).is_some(),
                "Legacy WCAG ID {} maps to rule {} which doesn't exist",
                wcag_id,
                rule_id
            );
        }
    }

    #[test]
    fn test_unique_rule_ids() {
        let mut ids: Vec<&str> = RULES.iter().map(|r| r.id).collect();
        ids.sort();
        let len_before = ids.len();
        ids.dedup();
        assert_eq!(len_before, ids.len(), "Duplicate rule IDs found");
    }
}