/* FLLM:CUSTOM_CSS_OK — explicit FLLM custom-CSS exemption per .aiad/policies/fllm-universal-enforcement.policy.md. See file body for class-by-class rationale. */
/* Prismatic Platform - Prose Typography System
 *
 * Typographic principles applied:
 * - Type scale: Major Third (1.25) for harmonious hierarchy
 * - Measure: 60-75ch optimal line length for readability
 * - Vertical rhythm: consistent spacing based on 1.5rem baseline
 * - Contrast: WCAG AA compliant text/background ratios
 * - Tracking: tighter on headings (-0.02em), neutral on body
 * - Leading: 1.65-1.7 for body text (optimal for 45-75ch measure)
 */

/* ==================== CSS Variables ==================== */
:root {
    --prose-body: #374151;
    --prose-heading: #111827;
    --prose-muted: #6b7280;
    --prose-link: #2563eb;
    --prose-link-hover: #1d4ed8;
    --prose-code-bg: #f3f4f6;
    --prose-code-text: #d946ef;
    --prose-pre-bg: #0f172a;
    --prose-pre-text: #e2e8f0;
    --prose-border: #e5e7eb;
    --prose-table-header: #f9fafb;
    --prose-table-stripe: rgba(0, 0, 0, 0.02);
    --prose-blockquote-bg: #f0f9ff;
    --prose-blockquote-border: #3b82f6;
    --prose-blockquote-text: #475569;
    /* Spacing scale (based on 0.25rem = 4px) */
    --space-1: 0.25rem;
    --space-2: 0.5rem;
    --space-3: 0.75rem;
    --space-4: 1rem;
    --space-6: 1.5rem;
    --space-8: 2rem;
    --space-10: 2.5rem;
    --space-12: 3rem;
}

.dark {
    --prose-body: #94a3b8;
    --prose-heading: #e2e8f0;
    --prose-muted: #64748b;
    --prose-link: #60a5fa;
    --prose-link-hover: #93c5fd;
    --prose-code-bg: rgba(255, 255, 255, 0.06);
    --prose-code-text: #c084fc;
    --prose-pre-bg: #0d1117;
    --prose-pre-text: #e6edf3;
    --prose-border: rgba(255, 255, 255, 0.06);
    --prose-table-header: rgba(255, 255, 255, 0.03);
    --prose-table-stripe: rgba(255, 255, 255, 0.02);
    --prose-blockquote-bg: rgba(59, 130, 246, 0.06);
    --prose-blockquote-border: #3b82f6;
    --prose-blockquote-text: #94a3b8;
}

/* ==================== Base Prose ==================== */
.prose {
    color: var(--prose-body);
    font-size: 1rem;               /* 16px base */
    line-height: 1.65;             /* Optimal for 60-75ch measure */
    max-width: 72ch;               /* Optimal measure for readability */
    letter-spacing: -0.011em;      /* Slight negative for Inter at body size */
    word-spacing: 0.01em;
    font-feature-settings: 'kern' 1, 'liga' 1, 'calt' 1;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    text-rendering: optimizeLegibility;
    hanging-punctuation: first last;
}

/* ==================== Headings ==================== */
/* Major Third scale: 1rem -> 1.25 -> 1.563 -> 1.953 -> 2.441 */
.prose h1,
.prose h2,
.prose h3,
.prose h4,
.prose h5,
.prose h6 {
    color: var(--prose-heading);
    font-weight: 600;
    line-height: 1.2;             /* Tighter leading for headings */
    letter-spacing: -0.025em;     /* Tighter tracking for headings */
    margin-top: var(--space-10);  /* Clear separation from previous content */
    margin-bottom: var(--space-4);/* Proximity to following content */
}

.prose h1 {
    font-size: 1.953rem;          /* Major Third^3 */
    font-weight: 700;
    line-height: 1.15;
    letter-spacing: -0.03em;
    margin-top: 0;
    padding-bottom: var(--space-3);
    border-bottom: 1px solid var(--prose-border);
}

.prose h2 {
    font-size: 1.563rem;          /* Major Third^2 */
    padding-bottom: var(--space-2);
    border-bottom: 1px solid var(--prose-border);
}

.prose h3 {
    font-size: 1.25rem;           /* Major Third^1 */
    margin-top: var(--space-8);
}

.prose h4 {
    font-size: 1rem;              /* Base size, weight differentiates */
    font-weight: 600;
    letter-spacing: -0.015em;
}

.prose h5 {
    font-size: 0.875rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;       /* Wider tracking for small caps style */
    color: var(--prose-muted);
}

.prose h6 {
    font-size: 0.8125rem;
    font-weight: 600;
    color: var(--prose-muted);
}

/* Heading proximity: reduce gap when headings follow headings */
.prose h1 + h2,
.prose h2 + h3,
.prose h3 + h4 {
    margin-top: var(--space-4);
}

/* ==================== Paragraphs ==================== */
.prose p {
    margin-bottom: var(--space-6); /* One baseline unit between paragraphs */
}

.prose p:last-child {
    margin-bottom: 0;
}

/* Lead paragraph - first paragraph after h1 */
.prose h1 + p {
    font-size: 1.125rem;
    line-height: 1.6;
    color: var(--prose-muted);
}

/* ==================== Links ==================== */
.prose a {
    color: var(--prose-link);
    text-decoration: underline;
    text-decoration-color: rgba(96, 165, 250, 0.3);
    text-underline-offset: 0.15em;
    text-decoration-thickness: 1px;
    font-weight: inherit;          /* Don't bold links - disrupts reading flow */
    transition: color 0.15s ease, text-decoration-color 0.15s ease;
}

.prose a:hover {
    color: var(--prose-link-hover);
    text-decoration-color: currentColor;
}

/* ==================== Lists ==================== */
.prose ul,
.prose ol {
    margin-bottom: var(--space-6);
    padding-left: 1.625rem;
}

.prose li {
    margin-bottom: var(--space-2);
    line-height: 1.65;
    padding-left: var(--space-1);
}

.prose li::marker {
    color: var(--prose-muted);
}

.prose li > p {
    margin-bottom: var(--space-2);
}

.prose ul ul,
.prose ol ol,
.prose ul ol,
.prose ol ul {
    margin-top: var(--space-2);
    margin-bottom: var(--space-2);
}

/* Tight lists (no p tags inside li) */
.prose li + li {
    margin-top: 0;
}

/* ==================== Inline Code ==================== */
.prose code {
    font-family: 'JetBrains Mono', 'Fira Code', ui-monospace, monospace;
    font-size: 0.8125em;          /* ~13px at 16px base - clear size distinction */
    font-weight: 400;
    padding: 0.125em 0.375em;
    background: var(--prose-code-bg);
    color: var(--prose-code-text);
    border-radius: 0.25rem;
    border: 1px solid var(--prose-border);
    word-break: break-word;
    -webkit-box-decoration-break: clone;
    box-decoration-break: clone;
}

.prose code::before,
.prose code::after {
    content: none;
}

/* ==================== Code Blocks ==================== */
.prose pre {
    margin: var(--space-8) 0;
    padding: var(--space-4) var(--space-6);
    background: var(--prose-pre-bg);
    border-radius: 0.5rem;
    overflow-x: auto;
    border: 1px solid var(--prose-border);
    box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.03);
    -webkit-overflow-scrolling: touch;
    position: relative;
}

.prose pre code {
    padding: 0;
    background: transparent;
    font-size: 0.8125rem;         /* 13px - standard for code */
    line-height: 1.65;            /* Match body rhythm */
    font-weight: 400;
    border: none;
    letter-spacing: 0;            /* Neutral for monospace */
    tab-size: 2;
    word-break: normal;
}

/* Fallback text color for code blocks without syntax highlighting */
.prose pre code {
    color: var(--prose-pre-text);
}

/* Zola/Giallo server-side highlighting overrides */
.prose pre.z-code {
    background-color: #0F111A;
}

.prose pre.z-code code {
    color: #BABED8;
}

/* Language badge on code blocks */
.prose pre code[data-lang]::before {
    content: attr(data-lang);
    position: absolute;
    top: 0.5rem;
    right: 3rem;
    font-size: 0.625rem;
    font-family: 'Inter', sans-serif;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    padding: 0.125rem 0.5rem;
    border-radius: 0.25rem;
    background: rgba(255, 255, 255, 0.06);
    color: rgba(255, 255, 255, 0.35);
    pointer-events: none;
}

/* ==================== Tables ==================== */
/* Mobile-safe tables: display:block + overflow-x lets wide markdown tables
   scroll horizontally inside their container instead of forcing the whole
   page wider than the viewport. Standard Tailwind Typography pattern. */
.prose table {
    display: block;
    width: 100%;
    max-width: 100%;
    margin: var(--space-8) 0;
    border-collapse: collapse;
    font-size: 0.875rem;          /* Slightly smaller for data density */
    line-height: 1.5;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
}

.prose thead {
    background: var(--prose-table-header);
}

.prose th {
    padding: var(--space-3) var(--space-4);
    text-align: left;
    font-weight: 600;
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--prose-muted);
    border-bottom: 1px solid var(--prose-border);
}

.prose td {
    padding: var(--space-3) var(--space-4);
    border-bottom: 1px solid var(--prose-border);
    vertical-align: top;
}

.prose tbody tr:nth-child(even) {
    background: var(--prose-table-stripe);
}

.prose tbody tr:last-child td {
    border-bottom: none;
}

/* ==================== Blockquotes ==================== */
.prose blockquote {
    margin: var(--space-8) 0;
    padding: var(--space-4) var(--space-6);
    border-left: 3px solid var(--prose-blockquote-border);
    background: var(--prose-blockquote-bg);
    border-radius: 0 0.375rem 0.375rem 0;
    color: var(--prose-blockquote-text);
    font-style: normal;
}

.prose blockquote p {
    margin-bottom: 0;
}

.prose blockquote p:not(:last-child) {
    margin-bottom: var(--space-4);
}

/* Nested blockquotes */
.prose blockquote blockquote {
    margin-top: var(--space-4);
    border-left-color: var(--prose-muted);
}

/* ==================== Horizontal Rule ==================== */
.prose hr {
    margin: var(--space-12) 0;
    border: none;
    border-top: 1px solid var(--prose-border);
}

/* ==================== Strong & Emphasis ==================== */
.prose strong {
    color: var(--prose-heading);
    font-weight: 600;
}

.prose em {
    font-style: italic;
}

/* ==================== Images ==================== */
.prose img {
    max-width: 100%;
    height: auto;
    border-radius: 0.5rem;
    margin: var(--space-8) auto;
    display: block;
}

.prose figure {
    margin: var(--space-8) 0;
}

.prose figcaption {
    font-size: 0.8125rem;
    color: var(--prose-muted);
    text-align: center;
    margin-top: var(--space-2);
    line-height: 1.5;
}

/* ==================== Definition Lists ==================== */
.prose dl {
    margin-bottom: var(--space-6);
}

.prose dt {
    font-weight: 600;
    color: var(--prose-heading);
    margin-top: var(--space-4);
}

.prose dd {
    margin-left: var(--space-6);
    margin-bottom: var(--space-2);
}

/* ==================== Mermaid Diagrams ==================== */
.prose .mermaid {
    margin: var(--space-8) 0;
    padding: var(--space-6);
    background: var(--prose-code-bg);
    border-radius: 0.5rem;
    overflow-x: auto;
}

.dark .prose .mermaid {
    background: var(--prose-pre-bg);
}

/* ==================== Task Lists ==================== */
.prose input[type="checkbox"] {
    margin-right: var(--space-2);
    width: 0.875rem;
    height: 0.875rem;
    accent-color: var(--prose-link);
    vertical-align: middle;
}

/* ==================== Footnotes ==================== */
.prose .footnote-ref {
    font-size: 0.75rem;
    vertical-align: super;
    color: var(--prose-link);
    line-height: 0;              /* Prevent footnote refs from affecting line height */
}

.prose .footnotes {
    margin-top: var(--space-12);
    padding-top: var(--space-6);
    border-top: 1px solid var(--prose-border);
    font-size: 0.8125rem;
    color: var(--prose-muted);
}

/* ==================== Abbreviations ==================== */
.prose abbr {
    cursor: help;
    text-decoration: underline dotted;
    text-decoration-color: var(--prose-muted);
    text-underline-offset: 0.15em;
}

/* ==================== Keyboard Input ==================== */
.prose kbd {
    font-family: 'JetBrains Mono', ui-monospace, monospace;
    font-size: 0.8125em;
    padding: 0.1em 0.35em;
    background: var(--prose-table-header);
    border: 1px solid var(--prose-border);
    border-radius: 0.25rem;
    box-shadow: 0 1px 0 var(--prose-border);
    white-space: nowrap;
}

/* ==================== Mark/Highlight ==================== */
.prose mark {
    background: rgba(250, 204, 21, 0.25);
    padding: 0.05em 0.2em;
    border-radius: 0.15em;
}

.dark .prose mark {
    background: rgba(250, 204, 21, 0.15);
    color: #fef3c7;
}

/* ==================== Details/Summary ==================== */
.prose details {
    margin: var(--space-6) 0;
    padding: var(--space-4) var(--space-6);
    background: var(--prose-table-header);
    border-radius: 0.5rem;
    border: 1px solid var(--prose-border);
}

.prose summary {
    cursor: pointer;
    font-weight: 600;
    color: var(--prose-heading);
    user-select: none;
}

.prose details[open] summary {
    margin-bottom: var(--space-4);
}

/* ==================== Responsive Typography ==================== */
@media (max-width: 640px) {
    .prose {
        font-size: 0.9375rem;     /* 15px on mobile - slightly smaller */
        line-height: 1.7;         /* Slightly more leading for smaller screens */
    }

    .prose h1 {
        font-size: 1.5rem;
    }

    .prose h2 {
        font-size: 1.25rem;
    }

    .prose h3 {
        font-size: 1.125rem;
    }

    .prose pre {
        padding: var(--space-3) var(--space-4);
        border-radius: 0.375rem;
        font-size: 0.75rem;
    }

    .prose table {
        font-size: 0.8125rem;
    }

    .prose th,
    .prose td {
        padding: var(--space-2) var(--space-3);
    }
}

/* ==================== Print ==================== */
@media print {
    .prose {
        font-size: 11pt;
        line-height: 1.5;
        color: #000;
        max-width: none;
    }

    .prose h1, .prose h2, .prose h3 {
        page-break-after: avoid;
        color: #000;
    }

    .prose pre, .prose blockquote, .prose table {
        page-break-inside: avoid;
    }

    .prose pre {
        white-space: pre-wrap;
        word-wrap: break-word;
        border: 1px solid #ccc;
    }

    .prose a {
        color: inherit;
        text-decoration: underline;
    }

    .prose a[href]::after {
        content: " (" attr(href) ")";
        font-size: 0.8em;
        color: #666;
    }
}