pub(super) fn styles() -> String {
    r##"<style>
/* ──────────────── Base / Print-first ──────────────── */
@page {
    size: A4;
    margin: 20mm 18mm 25mm 18mm;
}
@page :first {
    margin: 0;
}

*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }

:root {
    --text: #1a1a2e;
    --text-secondary: #475569;
    --text-muted: #64748b;
    --heading: #0d2137;
    --accent: #1a56db;
    --accent-light: #dbeafe;
    --border: #d1d5db;
    --border-light: #e5e7eb;
    --bg-subtle: #f8fafc;
    --bg-section: #f1f5f9;
    --sev-critical: #991b1b;
    --sev-high: #c2410c;
    --sev-medium: #a16207;
    --sev-low: #1d4ed8;
    --sev-info: #4b5563;
    --font-serif: 'Libre Baskerville', 'Georgia', serif;
    --font-sans: 'Source Sans 3', 'Helvetica Neue', sans-serif;
    --font-mono: 'JetBrains Mono', 'Consolas', monospace;
}

body {
    font-family: var(--font-sans);
    color: var(--text);
    background: #fff;
    line-height: 1.65;
    font-size: 10.5pt;
    -webkit-print-color-adjust: exact;
    print-color-adjust: exact;
}

.report-body {
    max-width: 190mm;
    margin: 0 auto;
    padding: 0 16px;
}

/* ──────────────── Cover Page ──────────────── */
.cover {
    height: 100vh;
    min-height: 297mm;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    text-align: center;
    padding: 40mm 30mm;
    page-break-after: always;
    break-after: page;
    position: relative;
    background: #fff;
}

.cover-shield {
    width: 72px;
    height: 72px;
    margin-bottom: 32px;
}

.cover-tag {
    display: inline-block;
    background: var(--sev-critical);
    color: #fff;
    font-family: var(--font-sans);
    font-size: 8pt;
    font-weight: 700;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    padding: 4px 16px;
    border-radius: 2px;
    margin-bottom: 28px;
}

.cover-title {
    font-family: var(--font-serif);
    font-size: 28pt;
    font-weight: 700;
    color: var(--heading);
    line-height: 1.2;
    margin-bottom: 8px;
}

.cover-subtitle {
    font-family: var(--font-serif);
    font-size: 14pt;
    color: var(--text-secondary);
    font-weight: 400;
    font-style: italic;
    margin-bottom: 48px;
}

.cover-meta {
    font-size: 10pt;
    color: var(--text-secondary);
    line-height: 2;
}

.cover-meta strong {
    color: var(--text);
}

.cover-divider {
    width: 60px;
    height: 2px;
    background: var(--accent);
    margin: 24px auto;
}

.cover-footer {
    position: absolute;
    bottom: 30mm;
    left: 0;
    right: 0;
    text-align: center;
    font-size: 8pt;
    color: var(--text-muted);
    letter-spacing: 0.05em;
}

/* ──────────────── Typography ──────────────── */
h2 {
    font-family: var(--font-serif);
    font-size: 16pt;
    font-weight: 700;
    color: var(--heading);
    margin: 36px 0 16px;
    padding-bottom: 8px;
    border-bottom: 2px solid var(--heading);
    page-break-after: avoid;
    break-after: avoid;
}

h3 {
    font-family: var(--font-serif);
    font-size: 12pt;
    font-weight: 700;
    color: var(--heading);
    margin: 24px 0 10px;
    page-break-after: avoid;
    break-after: avoid;
}

h4 {
    font-family: var(--font-sans);
    font-size: 10pt;
    font-weight: 700;
    color: var(--text-secondary);
    margin: 16px 0 8px;
}

p {
    margin: 8px 0;
    font-size: 10.5pt;
}

code {
    font-family: var(--font-mono);
    font-size: 9pt;
    background: var(--bg-section);
    padding: 1px 5px;
    border-radius: 3px;
    border: 1px solid var(--border-light);
    word-break: break-all;
}

/* ──────────────── Section Numbers ──────────────── */
.section-num {
    color: var(--accent);
    margin-right: 8px;
}

/* ──────────────── Table of Contents ──────────────── */
.toc {
    page-break-after: always;
    break-after: page;
    padding-top: 24px;
}

.toc h2 {
    border-bottom-color: var(--accent);
    margin-top: 0;
}

.toc-entry {
    display: flex;
    justify-content: space-between;
    align-items: baseline;
    padding: 6px 0;
    border-bottom: 1px dotted var(--border);
    font-size: 11pt;
}

.toc-entry .toc-num {
    font-weight: 700;
    color: var(--accent);
    min-width: 24px;
    margin-right: 10px;
}

.toc-entry .toc-label {
    flex: 1;
    font-weight: 600;
    color: var(--heading);
}

.toc-sub {
    padding: 3px 0 3px 34px;
    font-size: 9.5pt;
    color: var(--text-secondary);
}

/* ──────────────── Executive Summary ──────────────── */
.exec-grid {
    display: grid;
    grid-template-columns: 1fr 1fr 1fr 1fr;
    gap: 12px;
    margin: 16px 0 20px;
}

.kpi-card {
    border: 1px solid var(--border);
    border-radius: 6px;
    padding: 14px 12px;
    text-align: center;
    background: var(--bg-subtle);
}

.kpi-value {
    font-family: var(--font-serif);
    font-size: 22pt;
    font-weight: 700;
    line-height: 1.1;
}

.kpi-label {
    font-size: 8pt;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--text-muted);
    margin-top: 4px;
    font-weight: 600;
}

/* Risk gauge */
.risk-gauge {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 16px 20px;
    border: 1px solid var(--border);
    border-radius: 6px;
    background: var(--bg-subtle);
    margin: 16px 0;
}

.risk-gauge-meter {
    width: 140px;
    flex-shrink: 0;
}

.risk-gauge-track {
    height: 10px;
    background: var(--border-light);
    border-radius: 5px;
    overflow: hidden;
    position: relative;
}

.risk-gauge-fill {
    height: 100%;
    border-radius: 5px;
    transition: width 0.3s;
}

.risk-gauge-score {
    font-family: var(--font-serif);
    font-size: 9pt;
    font-weight: 700;
    text-align: center;
    margin-top: 3px;
}

.risk-gauge-text {
    flex: 1;
}

.risk-gauge-label {
    font-family: var(--font-serif);
    font-size: 14pt;
    font-weight: 700;
}

.risk-gauge-desc {
    font-size: 9.5pt;
    color: var(--text-secondary);
    margin-top: 2px;
}

/* Severity bar */
.sev-bar {
    display: flex;
    height: 28px;
    border-radius: 4px;
    overflow: hidden;
    margin: 12px 0 6px;
    border: 1px solid var(--border);
}

.sev-bar-seg {
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    font-size: 8.5pt;
    font-weight: 700;
    min-width: 24px;
}

.sev-bar-critical { background: var(--sev-critical); }
.sev-bar-high { background: var(--sev-high); }
.sev-bar-medium { background: var(--sev-medium); }
.sev-bar-low { background: var(--sev-low); }
.sev-bar-info { background: var(--sev-info); }

.sev-bar-legend {
    display: flex;
    gap: 16px;
    font-size: 8.5pt;
    color: var(--text-secondary);
    margin-bottom: 16px;
}

.sev-dot {
    display: inline-block;
    width: 8px;
    height: 8px;
    border-radius: 2px;
    margin-right: 4px;
    vertical-align: middle;
}

/* ──────────────── Info Tables ──────────────── */
table.info {
    width: 100%;
    border-collapse: collapse;
    margin: 10px 0;
    font-size: 10pt;
}

table.info td,
table.info th {
    padding: 7px 12px;
    border: 1px solid var(--border);
    text-align: left;
    vertical-align: top;
}

table.info td:first-child,
table.info th:first-child {
    width: 160px;
    font-weight: 600;
    color: var(--text-secondary);
    background: var(--bg-subtle);
}

/* Methodology tools table */
table.tools-table {
    width: 100%;
    border-collapse: collapse;
    margin: 10px 0;
    font-size: 10pt;
}

table.tools-table th {
    background: var(--heading);
    color: #fff;
    padding: 8px 12px;
    text-align: left;
    font-weight: 600;
    font-size: 9pt;
    text-transform: uppercase;
    letter-spacing: 0.04em;
}

table.tools-table td {
    padding: 6px 12px;
    border-bottom: 1px solid var(--border-light);
}

table.tools-table tr:nth-child(even) td {
    background: var(--bg-subtle);
}

table.tools-table td:first-child {
    width: 32px;
    text-align: center;
    color: var(--text-muted);
    font-weight: 600;
}

/* ──────────────── Badges ──────────────── */
.badge {
    display: inline-block;
    padding: 2px 8px;
    border-radius: 3px;
    font-size: 7.5pt;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.03em;
    vertical-align: middle;
}

.badge-exploit {
    background: var(--sev-critical);
    color: #fff;
}

/* ──────────────── Findings ──────────────── */
.sev-group-title {
    font-family: var(--font-sans);
    font-size: 11pt;
    font-weight: 700;
    color: var(--heading);
    padding: 8px 0 6px 12px;
    margin: 20px 0 8px;
    border-left: 4px solid;
    page-break-after: avoid;
    break-after: avoid;
}

.finding {
    border: 1px solid var(--border);
    border-left: 4px solid;
    border-radius: 0 4px 4px 0;
    padding: 14px 16px;
    margin-bottom: 12px;
    background: #fff;
    page-break-inside: avoid;
    break-inside: avoid;
}

.finding-header {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 8px;
}

.finding-id {
    font-family: var(--font-mono);
    font-size: 9pt;
    font-weight: 500;
    color: var(--text-muted);
    background: var(--bg-section);
    padding: 2px 6px;
    border-radius: 3px;
    border: 1px solid var(--border-light);
}

.finding-title {
    font-family: var(--font-serif);
    font-weight: 700;
    font-size: 11pt;
    flex: 1;
    color: var(--heading);
}

.finding-meta {
    border-collapse: collapse;
    margin: 6px 0;
    font-size: 9.5pt;
    width: 100%;
}

.finding-meta td {
    padding: 3px 10px 3px 0;
    vertical-align: top;
}

.finding-meta td:first-child {
    color: var(--text-muted);
    font-weight: 600;
    width: 90px;
    white-space: nowrap;
}

.finding-desc {
    margin: 8px 0;
    font-size: 10pt;
    color: var(--text);
    line-height: 1.6;
}

.remediation {
    margin-top: 10px;
    padding: 10px 14px;
    background: var(--accent-light);
    border-left: 3px solid var(--accent);
    border-radius: 0 4px 4px 0;
    font-size: 9.5pt;
    line-height: 1.55;
}

.remediation-label {
    font-weight: 700;
    font-size: 8.5pt;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    color: var(--accent);
    margin-bottom: 3px;
}

.evidence-block {
    margin: 10px 0;
    page-break-inside: avoid;
    break-inside: avoid;
}

.evidence-title {
    font-weight: 700;
    font-size: 8.5pt;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    color: var(--text-muted);
    margin-bottom: 4px;
}

.evidence-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 9pt;
}

.evidence-table th {
    background: var(--bg-section);
    padding: 5px 8px;
    text-align: left;
    font-weight: 600;
    font-size: 8.5pt;
    text-transform: uppercase;
    letter-spacing: 0.03em;
    color: var(--text-secondary);
    border: 1px solid var(--border-light);
}

.evidence-table td {
    padding: 5px 8px;
    border: 1px solid var(--border-light);
    vertical-align: top;
    word-break: break-word;
}

.evidence-payload {
    font-size: 8.5pt;
    color: var(--sev-critical);
}

.linked-sast {
    font-size: 9pt;
    color: var(--text-muted);
    margin: 6px 0;
    font-style: italic;
}

/* ──────────────── Code-Level Correlation ──────────────── */
.code-correlation {
    margin: 12px 0;
    border: 1px solid #e2e8f0;
    border-radius: 6px;
    overflow: hidden;
}
.code-correlation-title {
    background: #1e293b;
    color: #f8fafc;
    padding: 6px 12px;
    font-size: 9pt;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}
.code-correlation-item {
    padding: 10px 12px;
    border-bottom: 1px solid #e2e8f0;
}
.code-correlation-item:last-child { border-bottom: none; }
.code-correlation-badge {
    display: inline-block;
    background: #3b82f6;
    color: #fff;
    font-size: 7pt;
    font-weight: 600;
    padding: 2px 8px;
    border-radius: 3px;
    text-transform: uppercase;
    letter-spacing: 0.04em;
    margin-bottom: 6px;
}
.code-meta {
    width: 100%;
    font-size: 8.5pt;
    border-collapse: collapse;
    margin-bottom: 6px;
}
.code-meta td:first-child {
    width: 80px;
    font-weight: 600;
    color: var(--text-muted);
    padding: 2px 8px 2px 0;
    vertical-align: top;
}
.code-meta td:last-child {
    padding: 2px 0;
}
.code-snippet-block, .code-fix-block {
    margin: 6px 0;
}
.code-snippet-label, .code-fix-label {
    font-size: 7.5pt;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.04em;
    color: var(--text-muted);
    margin-bottom: 3px;
}
.code-snippet-label { color: #dc2626; }
.code-fix-label { color: #16a34a; }
.code-snippet {
    background: #fef2f2;
    border: 1px solid #fecaca;
    border-left: 3px solid #dc2626;
    padding: 8px 10px;
    font-family: 'JetBrains Mono', monospace;
    font-size: 8pt;
    line-height: 1.5;
    white-space: pre-wrap;
    word-break: break-word;
    border-radius: 0 4px 4px 0;
    margin: 0;
}
.code-fix {
    background: #f0fdf4;
    border: 1px solid #bbf7d0;
    border-left: 3px solid #16a34a;
    padding: 8px 10px;
    font-family: 'JetBrains Mono', monospace;
    font-size: 8pt;
    line-height: 1.5;
    white-space: pre-wrap;
    word-break: break-word;
    border-radius: 0 4px 4px 0;
    margin: 0;
}
.code-remediation {
    font-size: 8.5pt;
    color: var(--text-secondary);
    margin-top: 4px;
    padding: 4px 0;
}
.code-linked-vulns {
    font-size: 8.5pt;
    margin-top: 4px;
}
.code-linked-vulns ul {
    margin: 2px 0 0 16px;
    padding: 0;
}
.code-linked-vulns li {
    margin-bottom: 2px;
}

/* ──────────────── Attack Chain ──────────────── */
.phase-block {
    margin-bottom: 20px;
    page-break-inside: avoid;
    break-inside: avoid;
}

.phase-header {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 8px 14px;
    background: var(--heading);
    color: #fff;
    border-radius: 4px 4px 0 0;
    font-size: 9.5pt;
}

.phase-num {
    font-weight: 700;
    font-size: 8pt;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    background: rgba(255,255,255,0.15);
    padding: 2px 8px;
    border-radius: 3px;
}

.phase-label {
    font-weight: 600;
    flex: 1;
}

.phase-count {
    font-size: 8.5pt;
    opacity: 0.7;
}

.phase-steps {
    border: 1px solid var(--border);
    border-top: none;
    border-radius: 0 0 4px 4px;
}

.step-row {
    display: flex;
    align-items: flex-start;
    gap: 10px;
    padding: 8px 14px;
    border-bottom: 1px solid var(--border-light);
    position: relative;
}

.step-row:last-child {
    border-bottom: none;
}

.step-num {
    width: 22px;
    height: 22px;
    border-radius: 50%;
    background: var(--bg-section);
    border: 1px solid var(--border);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 8pt;
    font-weight: 700;
    color: var(--text-secondary);
    flex-shrink: 0;
    margin-top: 1px;
}

.step-connector {
    display: none;
}

.step-content {
    flex: 1;
    min-width: 0;
}

.step-header {
    display: flex;
    align-items: center;
    gap: 8px;
    flex-wrap: wrap;
}

.step-tool {
    font-family: var(--font-mono);
    font-size: 9.5pt;
    font-weight: 500;
    color: var(--heading);
}

.step-status {
    font-size: 7.5pt;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.04em;
    padding: 1px 7px;
    border-radius: 3px;
}

.step-completed { background: #dcfce7; color: #166534; }
.step-failed { background: #fef2f2; color: #991b1b; }
.step-running { background: #fef9c3; color: #854d0e; }

.step-findings {
    font-size: 8pt;
    font-weight: 600;
    color: var(--sev-high);
    background: #fff7ed;
    padding: 1px 7px;
    border-radius: 3px;
    border: 1px solid #fed7aa;
}

.step-risk {
    font-size: 7.5pt;
    font-weight: 700;
    padding: 1px 6px;
    border-radius: 3px;
}

.risk-high { background: #fef2f2; color: var(--sev-critical); border: 1px solid #fecaca; }
.risk-med { background: #fffbeb; color: var(--sev-medium); border: 1px solid #fde68a; }
.risk-low { background: #f0fdf4; color: #166534; border: 1px solid #bbf7d0; }

.step-reasoning {
    font-size: 9pt;
    color: var(--text-muted);
    margin-top: 3px;
    line-height: 1.5;
    font-style: italic;
}

/* ──────────────── Footer ──────────────── */
.report-footer {
    margin-top: 48px;
    padding-top: 14px;
    border-top: 2px solid var(--heading);
    font-size: 8pt;
    color: var(--text-muted);
    text-align: center;
    line-height: 1.8;
}

.report-footer .footer-company {
    font-weight: 700;
    color: var(--text-secondary);
}

/* ──────────────── Page Break Utilities ──────────────── */
.page-break {
    page-break-before: always;
    break-before: page;
}

.avoid-break {
    page-break-inside: avoid;
    break-inside: avoid;
}

/* ──────────────── Print Overrides ──────────────── */
@media print {
    body {
        font-size: 10pt;
    }
    .cover {
        height: auto;
        min-height: 250mm;
        padding: 50mm 20mm;
    }
    .report-body {
        padding: 0;
    }
    .no-print {
        display: none !important;
    }
    a {
        color: var(--accent);
        text-decoration: none;
    }
}

/* ──────────────── Screen Enhancements ──────────────── */
@media screen {
    body {
        background: #e2e8f0;
    }
    .cover {
        background: #fff;
        box-shadow: 0 1px 4px rgba(0,0,0,0.08);
    }
    .report-body {
        background: #fff;
        padding: 20px 32px 40px;
        box-shadow: 0 1px 4px rgba(0,0,0,0.08);
        margin-bottom: 40px;
    }
}
</style>"##
        .to_string()
}
