/* =========================================================================
   Zomestruct — structural calculations report
   Engineering-document aesthetic. Calc-package conventions.
   ========================================================================= */

@import url('https://fonts.googleapis.com/css2?family=IBM+Plex+Sans:wght@300;400;500;600;700&family=IBM+Plex+Serif:ital,wght@0,400;0,500;1,400&family=IBM+Plex+Mono:wght@400;500;600&display=swap');

/* --- Tokens ---------------------------------------------------------------*/
:root {
    /* Paper / ink — calc package convention: white paper, black ink */
    --paper:        #ffffff;
    --paper-soft:   #f4f5f7;     /* very light gray, used for shading bands */
    --paper-edge:   #c8ccd2;     /* hairlines, gridlines */
    --paper-deep:   #8d949e;     /* heavier rules */

    --ink:          #0b0d10;     /* near-black for primary text */
    --ink-soft:     #2c3138;
    --ink-mute:     #5a6068;
    --ink-quiet:    #8d949e;

    /* Single accent — engineering blue, used very sparingly */
    --accent:       #1a3556;
    --accent-soft:  #e6ebf2;

    /* Status — only red/green/amber, no decoration */
    --pass:         #14633a;
    --pass-bg:      #e3efe7;
    --fail:         #a01818;
    --fail-bg:      #f4dcd9;
    --warn:         #8a5a06;
    --warn-bg:      #f4e7c9;

    /* Type scale — calc-package density */
    --type-h1:      2.15rem;
    --type-h2:      1.55rem;
    --type-h3:      1.22rem;
    --type-h4:      1.02rem;
    --type-body:    1.05rem;       /* ~16.8px */
    --type-small:   0.88rem;
    --type-tiny:    0.78rem;

    /* Layout */
    --col-toc:      280px;
    --col-content:  860px;
}

* { box-sizing: border-box; }

html, body {
    margin: 0;
    padding: 0;
    background: var(--paper-soft);
    color: var(--ink);
    font-family: 'IBM Plex Serif', 'Charter', Georgia, serif;
    font-size: var(--type-body);
    line-height: 1.55;
    font-feature-settings: "kern", "liga";
    text-rendering: optimizeLegibility;
    -webkit-font-smoothing: antialiased;
    scroll-behavior: smooth;
}

/* Sans face for UI / labels / tables */
.sans, h1, h2, h3, h4, h5, .toc, .doc-control, table.data thead th,
.cover__title, .section__number, .section__title, .finding__index,
.finding__title, .stat__num, .stat__label, .pill, .titleblock,
.sigblock, .sigblock__heading, .sigblock__label, .callout__label,
.section__lede, .table-wrap__caption .label, .figure figcaption .label,
.cover__masthead, .cover__eyebrow, .cover__meta dt, .cover__meta dd,
.toc__pdf, .footer {
    font-family: 'IBM Plex Sans', 'Helvetica Neue', Arial, sans-serif;
}

/* Mono for data / code / dimensions */
.mono, code, pre, .num, table.data .num, .doc-control dd,
.dc-bar__value, .stat__num small {
    font-family: 'IBM Plex Mono', ui-monospace, monospace;
    font-feature-settings: "tnum", "zero";
}

/* --- Cover (calc-package title sheet) -------------------------------------*/
.cover {
    position: relative;
    background: var(--paper);
    margin: 0;
    padding: 28mm 22mm;
    min-height: calc(100vh - 0px);
    border-bottom: 4px double var(--ink);
    display: grid;
    grid-template-rows: auto auto 1fr auto auto;
    gap: 14mm;
    max-width: 100%;
    box-shadow: 0 0 0 1px var(--paper-edge);
}

.cover__masthead {
    display: grid;
    grid-template-columns: 1fr auto;
    align-items: center;
    border-bottom: 2px solid var(--ink);
    padding-bottom: 6mm;
    text-transform: uppercase;
    font-size: 0.78rem;
    letter-spacing: 0.1em;
    font-weight: 500;
    color: var(--ink);
}

.cover__masthead .rule { display: none; }

.cover__hero {
    max-width: 1200px;
}

.cover__eyebrow {
    display: block;
    font-size: 0.78rem;
    text-transform: uppercase;
    letter-spacing: 0.16em;
    color: var(--ink-mute);
    margin-bottom: 4mm;
    font-weight: 500;
}

.cover__title {
    font-family: 'IBM Plex Sans', sans-serif;
    font-weight: 600;
    font-size: clamp(2.4rem, 5vw, 3.6rem);
    line-height: 1.05;
    letter-spacing: -0.01em;
    color: var(--ink);
    margin: 0 0 6mm;
}

.cover__title em {
    font-style: normal;
    font-weight: 300;
    color: var(--ink-soft);
    display: block;
    font-size: 0.7em;
    margin-top: 2mm;
}

.cover__subtitle {
    font-family: 'IBM Plex Serif', serif;
    font-weight: 400;
    font-style: italic;
    font-size: clamp(1rem, 1.4vw, 1.18rem);
    line-height: 1.45;
    color: var(--ink-soft);
    max-width: 70ch;
    margin: 0;
}

/* Cover logo — Zomes mark, inverted for placement on white cover */
.cover__logo {
    position: absolute;
    right: 22mm;
    top: 60mm;
    width: clamp(170px, 22vw, 280px);
    height: auto;
    pointer-events: none;
    filter: invert(1);
}

@media (max-width: 900px) {
    .cover__plate { display: none; }
}

.cover__meta {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(170px, 1fr));
    border: 1px solid var(--ink);
    margin: 0;
    background: var(--paper);
    font-size: 0.82rem;
}

.cover__meta > div {
    padding: 4mm 5mm;
    border-right: 1px solid var(--paper-edge);
    border-bottom: 1px solid var(--paper-edge);
}

.cover__meta > div:nth-child(3n) { border-right: none; }

.cover__meta dt {
    text-transform: uppercase;
    font-size: 0.66rem;
    letter-spacing: 0.12em;
    color: var(--ink-mute);
    font-weight: 600;
    margin-bottom: 2mm;
}

.cover__meta dd {
    margin: 0;
    color: var(--ink);
    font-weight: 400;
    line-height: 1.4;
}

.cover__meta dd .num {
    font-size: 1.05rem;
    font-weight: 500;
}

/* Doc-control strip — drawing-style title block --------------------------*/
.doc-control {
    display: grid;
    grid-template-columns: repeat(6, 1fr);
    border: 1px solid var(--ink);
    background: var(--paper);
    margin: 0;
    font-size: 0.74rem;
    overflow: hidden;
}

.doc-control > div {
    padding: 3mm 4mm;
    border-right: 1px solid var(--paper-edge);
    background: var(--paper-soft);
}

.doc-control > div:last-child { border-right: none; }

.doc-control dt {
    text-transform: uppercase;
    font-size: 0.62rem;
    letter-spacing: 0.12em;
    color: var(--ink-mute);
    margin-bottom: 1.5mm;
    font-weight: 600;
}

.doc-control dd {
    margin: 0;
    font-weight: 500;
    color: var(--ink);
    font-size: 0.84rem;
    font-family: 'IBM Plex Mono', monospace;
}

@media (max-width: 800px) {
    .doc-control { grid-template-columns: repeat(2, 1fr); }
    .doc-control > div { border-right: 1px solid var(--paper-edge) !important; border-bottom: 1px solid var(--paper-edge); }
    .cover__meta > div { border-right: 1px solid var(--paper-edge) !important; }
}

/* EOR signature block — engineering-doc convention -----------------------*/
.sigblock {
    display: grid;
    grid-template-columns: 1.4fr 1fr 1fr;
    grid-template-rows: auto auto auto;
    grid-auto-flow: row;
    gap: 0;
    border: 1.5px solid var(--ink);
    background: var(--paper);
    font-family: 'IBM Plex Sans', sans-serif;
    font-size: 0.78rem;
    margin: 0;
}

.sigblock__heading {
    grid-column: 1 / -1;
    background: var(--ink);
    color: var(--paper);
    padding: 3mm 5mm;
    display: flex;
    align-items: center;
    justify-content: space-between;
    text-transform: uppercase;
    letter-spacing: 0.12em;
    font-size: 0.7rem;
    font-weight: 600;
}

.sigblock__heading strong { font-weight: 700; }
.sigblock__heading .status {
    background: var(--warn-bg);
    color: var(--warn);
    padding: 0.5mm 3mm;
    font-weight: 600;
    letter-spacing: 0.12em;
}

.sigblock__field {
    padding: 4mm 5mm 4mm;
    border-right: 1px solid var(--paper-edge);
    border-bottom: 1px solid var(--paper-edge);
    display: flex;
    flex-direction: column;
    gap: 4mm;
}

.sigblock__field:last-of-type { border-right: none; }

.sigblock__label {
    display: block;
    text-transform: uppercase;
    font-size: 0.62rem;
    letter-spacing: 0.12em;
    color: var(--ink-mute);
    font-weight: 600;
    margin-bottom: 1mm;
}

.sigblock__line {
    display: block;
    border-bottom: 1px solid var(--ink);
    min-height: 8mm;
    padding: 0 0 0.5mm;
    color: var(--ink-quiet);
    font-style: italic;
    font-family: 'IBM Plex Serif', serif;
    font-size: 0.85rem;
}

.sigblock__stamp {
    grid-column: 1 / -1;
    border-top: 1px solid var(--paper-edge);
    border: 1px dashed var(--ink-mute);
    margin: 0 5mm 5mm;
    display: grid;
    place-items: center;
    color: var(--ink-quiet);
    font-style: italic;
    font-family: 'IBM Plex Serif', serif;
    font-size: 0.78rem;
    text-align: center;
    padding: 6mm;
    line-height: 1.4;
    min-height: 30mm;
}

/* --- Layout shell --------------------------------------------------------*/
.shell {
    position: relative;
    display: grid;
    /* TOC + content column. Content column never grows past --col-content
       (plus padding) so the whole TOC+content spread stays a fixed width,
       and the .shell's margin: 0 auto centers it on wide viewports. */
    grid-template-columns: var(--col-toc) minmax(0, calc(var(--col-content) + 22mm));
    justify-content: center;
    max-width: 100%;
    margin: 0 auto;
    background: var(--paper-soft);
}

@media (max-width: 1020px) {
    .shell { grid-template-columns: 1fr; }
}

/* --- TOC (calc-package style: indented decimal numbering) ---------------*/
.toc {
    position: sticky;
    top: 0;
    align-self: start;
    height: 100vh;
    overflow-y: auto;
    padding: 14mm 5mm 14mm 14mm;
    border-right: 1px solid var(--paper-edge);
    background: var(--paper);
    font-size: 0.95rem;
    font-family: 'IBM Plex Sans', sans-serif;
    scrollbar-width: thin;
    scrollbar-color: var(--paper-deep) transparent;
}

.toc::-webkit-scrollbar { width: 6px; }
.toc::-webkit-scrollbar-thumb { background: var(--paper-deep); }

.toc__brand {
    text-transform: uppercase;
    letter-spacing: 0.14em;
    font-size: 0.66rem;
    color: var(--ink-mute);
    font-weight: 600;
    margin-bottom: 3mm;
    border-bottom: 1px solid var(--paper-edge);
    padding-bottom: 2mm;
}

.toc__title {
    font-family: 'IBM Plex Sans', sans-serif;
    font-weight: 600;
    font-size: 1.05rem;
    margin: 0 0 5mm;
    color: var(--ink);
    letter-spacing: -0.01em;
}

.toc ol {
    list-style: none;
    padding: 0;
    margin: 0;
    counter-reset: section;
}

.toc > ol > li {
    counter-increment: section;
    margin-bottom: 2mm;
    line-height: 1.3;
}

.toc > ol > li > a::before {
    content: counter(section) ".0";
    display: inline-block;
    width: 4em;
    color: var(--ink-mute);
    font-family: 'IBM Plex Mono', monospace;
    font-size: 0.78em;
    font-weight: 500;
}

.toc a {
    color: var(--ink);
    text-decoration: none;
    display: block;
    padding: 1mm 0;
    transition: color 0.15s, background 0.15s;
}

.toc a:hover, .toc a:focus { color: var(--accent); }
.toc a.active {
    color: var(--accent);
    font-weight: 600;
}
.toc a.active::before { color: var(--accent); }

.toc ol ol {
    margin: 1mm 0 2mm 4em;
    padding: 0;
    counter-reset: subsection;
    font-size: 0.92em;
    color: var(--ink-mute);
}

.toc ol ol li { counter-increment: subsection; margin-bottom: 0.5mm; }

.toc ol ol > li > a::before {
    content: counter(section) "." counter(subsection);
    color: var(--ink-quiet);
    font-family: 'IBM Plex Mono', monospace;
    font-size: 0.82em;
    margin-right: 0.5em;
    width: auto;
    display: inline;
}

.toc__pdf {
    display: inline-block;
    margin-top: 8mm;
    padding: 2.5mm 5mm;
    border: 1.5px solid var(--ink);
    background: var(--paper);
    color: var(--ink);
    text-decoration: none;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    font-size: 0.7rem;
    font-weight: 600;
    transition: background 0.15s, color 0.15s;
}

.toc__pdf:hover { background: var(--ink); color: var(--paper); }

/* TOC: secondary link (alongside the calc-package download) */
.toc__link {
    display: inline-block;
    margin-top: 3mm;
    padding: 2.5mm 5mm;
    border: 1px solid var(--paper-deep);
    background: var(--paper);
    color: var(--ink);
    text-decoration: none;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    font-size: 0.68rem;
    font-weight: 500;
    transition: border-color 0.15s, color 0.15s;
}

.toc__link:hover { border-color: var(--ink); color: var(--accent); }

/* Cover: companion-document banner */
.cover__companion {
    margin-top: 4mm;
    padding: 3mm 5mm;
    background: var(--accent-soft);
    border: 1px solid var(--accent);
    border-left-width: 4px;
    display: grid;
    grid-template-columns: 1fr auto;
    align-items: center;
    gap: 4mm;
    font-family: 'IBM Plex Sans', sans-serif;
    font-size: 0.84rem;
    color: var(--ink);
}

.cover__companion strong { font-weight: 600; }

.cover__companion .actions {
    display: inline-flex;
    gap: 2mm;
}

.cover__companion a {
    display: inline-block;
    padding: 2mm 4mm;
    border: 1.5px solid var(--ink);
    background: var(--ink);
    color: var(--paper);
    text-decoration: none;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    font-size: 0.7rem;
    font-weight: 600;
    transition: background 0.15s, color 0.15s;
}

.cover__companion a.secondary {
    background: var(--paper);
    color: var(--ink);
}

.cover__companion a:hover { background: var(--accent); color: var(--paper); border-color: var(--accent); }

/* --- Page title block (drawing-style, on every section) -----------------*/
.titleblock {
    border: 1px solid var(--ink);
    background: var(--paper);
    margin-bottom: 8mm;
    display: grid;
    grid-template-columns: 1fr 1fr 1fr 1fr;
    font-size: 0.7rem;
    overflow: hidden;
}

.titleblock > div {
    padding: 2mm 3mm;
    border-right: 1px solid var(--paper-edge);
}

.titleblock > div:last-child { border-right: none; }

.titleblock dt {
    text-transform: uppercase;
    font-size: 0.6rem;
    letter-spacing: 0.12em;
    color: var(--ink-mute);
    margin-bottom: 1mm;
    font-weight: 600;
}

.titleblock dd {
    margin: 0;
    font-family: 'IBM Plex Mono', monospace;
    font-size: 0.78rem;
    font-weight: 500;
}

/* --- Content -------------------------------------------------------------*/
.content {
    padding: 14mm 14mm 22mm 8mm;
    max-width: var(--col-content);
    margin: 0;
    counter-reset: section;
    background: var(--paper);
    box-shadow: 0 0 0 1px var(--paper-edge);
}

.section {
    margin-bottom: 14mm;
    counter-increment: section;
    counter-reset: subsection;
    padding-top: 0;
}

.section__number {
    display: block;
    font-family: 'IBM Plex Sans', sans-serif;
    font-size: 0.74rem;
    text-transform: uppercase;
    letter-spacing: 0.16em;
    color: var(--ink-mute);
    font-weight: 600;
    margin-bottom: 2mm;
    border-bottom: 2px solid var(--ink);
    padding-bottom: 1.5mm;
}

.section__number::before {
    content: counter(section) ".0  —  ";
    color: var(--ink);
    font-family: 'IBM Plex Mono', monospace;
    font-weight: 700;
    letter-spacing: 0.04em;
}

.section__title {
    font-family: 'IBM Plex Sans', sans-serif;
    font-weight: 600;
    font-size: var(--type-h1);
    line-height: 1.2;
    margin: 4mm 0 4mm;
    letter-spacing: -0.005em;
    color: var(--ink);
}

.section__lede {
    font-family: 'IBM Plex Sans', sans-serif;
    font-style: normal;
    font-weight: 300;
    font-size: 1.02rem;
    line-height: 1.5;
    color: var(--ink-soft);
    max-width: 64ch;
    margin: 0 0 8mm;
    padding: 4mm 0 6mm;
    border-bottom: 1px solid var(--paper-edge);
}

.section h3 {
    counter-increment: subsection;
    font-family: 'IBM Plex Sans', sans-serif;
    font-weight: 600;
    font-size: var(--type-h2);
    line-height: 1.3;
    margin: 8mm 0 3mm;
    color: var(--ink);
}

.section h3::before {
    content: counter(section) "." counter(subsection) "  ";
    color: var(--ink-mute);
    font-family: 'IBM Plex Mono', monospace;
    font-weight: 500;
    font-size: 0.8em;
    margin-right: 0.4em;
}

.section h4 {
    font-family: 'IBM Plex Sans', sans-serif;
    font-weight: 600;
    font-size: var(--type-h4);
    text-transform: none;
    margin: 5mm 0 1.5mm;
    color: var(--ink);
}

.section p {
    margin: 0 0 2.5mm;
    max-width: 72ch;
}

.section a {
    color: var(--accent);
    text-decoration: underline;
    text-decoration-color: var(--paper-deep);
    text-underline-offset: 0.18em;
    text-decoration-thickness: 1px;
    transition: text-decoration-color 0.15s;
}

.section a:hover { text-decoration-color: var(--accent); }

.section ul, .section ol {
    margin: 0 0 4mm;
    padding-left: 6mm;
    max-width: 72ch;
}

.section ul li, .section ol li { margin-bottom: 1.2mm; }

.section ul {
    list-style: none;
    padding-left: 0;
}

.section ul > li {
    padding-left: 6mm;
    position: relative;
}

.section ul > li::before {
    content: "■";
    position: absolute;
    left: 0;
    color: var(--ink-mute);
    font-size: 0.62em;
    top: 0.55em;
}

/* --- Status pills --------------------------------------------------------*/
.pill {
    display: inline-block;
    padding: 0.18em 0.55em;
    border: 1px solid currentColor;
    font-family: 'IBM Plex Sans', sans-serif;
    font-size: 0.7rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    line-height: 1.4;
}

.pill--pass { background: var(--pass-bg); color: var(--pass); }
.pill--fail { background: var(--fail-bg); color: var(--fail); }
.pill--warn { background: var(--warn-bg); color: var(--warn); }
.pill--info { background: var(--accent-soft); color: var(--accent); }

/* --- Margin notes (asides) ----------------------------------------------*/
.margin-note {
    border-left: 3px solid var(--ink-mute);
    padding: 2mm 4mm;
    margin: 3mm 0;
    background: var(--paper-soft);
    font-family: 'IBM Plex Serif', serif;
    font-style: italic;
    font-size: 0.88rem;
    line-height: 1.45;
    color: var(--ink-soft);
}

/* --- Callouts ------------------------------------------------------------*/
.callout {
    margin: 5mm 0;
    padding: 4mm 5mm;
    background: var(--paper-soft);
    border: 1px solid var(--paper-edge);
    border-left: 3px solid var(--ink);
    font-family: 'IBM Plex Serif', serif;
}

.callout--warn { border-left-color: var(--warn); background: var(--warn-bg); }
.callout--fail { border-left-color: var(--fail); background: var(--fail-bg); }
.callout--pass { border-left-color: var(--pass); background: var(--pass-bg); }

.callout__label {
    display: block;
    font-family: 'IBM Plex Sans', sans-serif;
    font-size: 0.66rem;
    text-transform: uppercase;
    letter-spacing: 0.14em;
    color: var(--ink-mute);
    margin-bottom: 1.5mm;
    font-weight: 600;
}

.callout p { margin-bottom: 2mm; }
.callout p:last-child { margin-bottom: 0; }

/* --- Tables (calc-package: full grid borders) ---------------------------*/
.table-wrap {
    margin: 5mm 0;
    overflow-x: auto;
    font-family: 'IBM Plex Sans', sans-serif;
    font-size: 0.84rem;
}

.table-wrap__caption {
    font-family: 'IBM Plex Serif', serif;
    font-style: italic;
    font-size: 0.86rem;
    color: var(--ink-soft);
    margin-bottom: 2mm;
    max-width: 72ch;
}

.table-wrap__caption .label {
    font-family: 'IBM Plex Sans', sans-serif;
    font-style: normal;
    text-transform: uppercase;
    letter-spacing: 0.12em;
    font-size: 0.7rem;
    color: var(--ink);
    font-weight: 700;
    margin-right: 0.6em;
}

table.data {
    width: 100%;
    border-collapse: collapse;
    border: 1px solid var(--ink);
}

table.data th, table.data td {
    padding: 2.2mm 3mm;
    text-align: left;
    vertical-align: baseline;
    border: 1px solid var(--paper-edge);
}

table.data thead {
    background: var(--ink);
    color: var(--paper);
}

table.data thead th {
    border: 1px solid var(--ink);
    border-bottom-color: var(--paper);
    font-weight: 600;
    text-transform: uppercase;
    font-size: 0.68rem;
    letter-spacing: 0.1em;
    color: var(--paper);
}

table.data .num {
    text-align: right;
    font-feature-settings: "tnum", "zero";
}

table.data .row-emphasis {
    background: var(--accent-soft);
}

table.data .row-emphasis td { font-weight: 500; }

table.data tfoot td {
    background: var(--paper-soft);
    font-style: italic;
    font-size: 0.78rem;
    color: var(--ink-soft);
    font-family: 'IBM Plex Serif', serif;
}

/* --- D/C bar (inline horizontal proportion) -----------------------------*/
.dc-bar {
    display: inline-flex;
    align-items: center;
    gap: 2mm;
    width: 100%;
    min-width: 110px;
}

.dc-bar__track {
    position: relative;
    flex: 1;
    height: 2.6mm;
    background: var(--paper-soft);
    border: 1px solid var(--paper-edge);
    overflow: hidden;
}

.dc-bar__fill {
    position: absolute;
    inset: 0 auto 0 0;
    background: var(--pass);
}

.dc-bar__fill--warn { background: var(--warn); }
.dc-bar__fill--fail { background: var(--fail); }

.dc-bar__track::after {
    content: "";
    position: absolute;
    top: -1mm; bottom: -1mm;
    left: calc(100% - 1px);
    width: 1px;
    background: var(--ink);
}

.dc-bar__value {
    font-weight: 600;
    width: 4ch;
    text-align: right;
}

/* --- Stat block ---------------------------------------------------------*/
.stat-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(170px, 1fr));
    gap: 0;
    margin: 5mm 0 6mm;
    border: 1px solid var(--ink);
    background: var(--paper);
}

.stat {
    padding: 4mm 5mm;
    border-right: 1px solid var(--paper-edge);
}

.stat:last-child { border-right: none; }

.stat__num {
    font-family: 'IBM Plex Mono', monospace;
    font-size: 1.8rem;
    line-height: 1;
    color: var(--ink);
    font-weight: 500;
}

.stat__num small {
    font-size: 0.5em;
    color: var(--ink-mute);
    margin-left: 0.4em;
    vertical-align: 0.3em;
    font-weight: 400;
}

.stat__label {
    font-family: 'IBM Plex Sans', sans-serif;
    font-size: 0.7rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--ink-mute);
    margin-top: 2mm;
    font-weight: 500;
    line-height: 1.3;
}

/* --- Figures ------------------------------------------------------------*/
figure.figure {
    margin: 5mm 0;
    padding: 0;
    border: 1px solid var(--paper-edge);
    background: var(--paper);
}

figure.figure svg, figure.figure img {
    display: block;
    width: 100%;
    height: auto;
}

figure.figure figcaption {
    font-family: 'IBM Plex Serif', serif;
    font-style: italic;
    font-size: 0.84rem;
    color: var(--ink-soft);
    padding: 2mm 4mm 3mm;
    border-top: 1px solid var(--paper-edge);
    background: var(--paper-soft);
}

figure.figure figcaption .label {
    font-family: 'IBM Plex Sans', sans-serif;
    font-style: normal;
    text-transform: uppercase;
    letter-spacing: 0.12em;
    font-size: 0.7rem;
    color: var(--ink);
    font-weight: 700;
    margin-right: 0.5em;
}

/* --- Code ---------------------------------------------------------------*/
code {
    font-family: 'IBM Plex Mono', monospace;
    font-size: 0.92em;
    background: var(--paper-soft);
    border: 1px solid var(--paper-edge);
    padding: 0.05em 0.35em;
    color: var(--ink);
}

pre {
    background: var(--paper-soft);
    color: var(--ink);
    border: 1px solid var(--paper-edge);
    border-left: 3px solid var(--accent);
    padding: 4mm 5mm;
    overflow-x: auto;
    font-family: 'IBM Plex Mono', monospace;
    font-size: 0.82rem;
    line-height: 1.55;
    margin: 4mm 0;
}

pre code { background: transparent; border: none; padding: 0; color: inherit; }

/* --- Finding (numbered result block) ------------------------------------*/
.finding {
    margin-top: 10mm;
    padding-top: 6mm;
    border-top: 2px solid var(--ink);
}

.finding__index {
    font-family: 'IBM Plex Sans', sans-serif;
    font-size: 0.7rem;
    text-transform: uppercase;
    letter-spacing: 0.16em;
    color: var(--ink);
    font-weight: 700;
}

.finding__title {
    font-family: 'IBM Plex Sans', sans-serif;
    font-weight: 600;
    font-size: var(--type-h2);
    line-height: 1.2;
    margin: 1mm 0 3mm;
    color: var(--ink);
}

.finding__verdict {
    display: flex;
    align-items: center;
    gap: 2mm;
    margin: 0 0 4mm;
    padding-bottom: 3mm;
    border-bottom: 1px solid var(--paper-edge);
    font-family: 'IBM Plex Sans', sans-serif;
    font-size: 0.82rem;
    color: var(--ink-soft);
}

/* =========================================================================
   DEEP-LINK / SOURCE-VIEWER COMPONENT
   Clickable values open a popup with computation + download links + repro.
   ========================================================================= */

.src {
    display: inline-flex;
    align-items: baseline;
    gap: 0.15em;
    cursor: pointer;
    border-bottom: 1px dashed var(--accent);
    transition: background 0.15s, color 0.15s;
    padding: 0 0.1em;
}

.src:hover { background: var(--accent-soft); }
.src:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }

.src__value { font-weight: 600; color: inherit; }

.src__icon {
    display: inline-block;
    width: 0.85em;
    height: 0.85em;
    margin-left: 0.15em;
    fill: currentColor;
    opacity: 0.55;
    transform: translateY(0.05em);
}

.src:hover .src__icon { opacity: 1; }

/* The dialog itself (uses native <dialog> element) */
dialog.src-popup {
    width: min(720px, 92vw);
    max-height: 86vh;
    padding: 0;
    border: 2px solid var(--ink);
    background: var(--paper);
    color: var(--ink);
    box-shadow: 0 16px 48px rgba(0,0,0,0.32);
    font-family: 'IBM Plex Sans', sans-serif;
}

dialog.src-popup::backdrop {
    background: rgba(11, 13, 16, 0.55);
    -webkit-backdrop-filter: blur(2px);
    backdrop-filter: blur(2px);
}

dialog.src-popup .popup__head {
    display: grid;
    grid-template-columns: 1fr auto;
    align-items: center;
    padding: 4mm 6mm;
    background: var(--ink);
    color: var(--paper);
}

dialog.src-popup .popup__title {
    margin: 0;
    font-family: 'IBM Plex Sans', sans-serif;
    font-weight: 600;
    font-size: 0.95rem;
    letter-spacing: 0.01em;
    color: var(--paper);
}

dialog.src-popup .popup__sub {
    font-family: 'IBM Plex Mono', monospace;
    font-size: 0.74rem;
    color: rgba(255,255,255,0.7);
    margin: 1mm 0 0;
    letter-spacing: 0.04em;
}

dialog.src-popup .popup__close {
    background: transparent;
    border: 1px solid rgba(255,255,255,0.4);
    color: var(--paper);
    font-family: 'IBM Plex Mono', monospace;
    font-size: 0.78rem;
    padding: 1mm 4mm;
    cursor: pointer;
    transition: background 0.15s;
    line-height: 1;
}

dialog.src-popup .popup__close:hover { background: rgba(255,255,255,0.15); }

dialog.src-popup .popup__body {
    padding: 5mm 6mm 6mm;
    overflow-y: auto;
    max-height: calc(86vh - 24mm);
    background: var(--paper);
}

dialog.src-popup .popup__section {
    margin-bottom: 5mm;
    padding-bottom: 4mm;
    border-bottom: 1px solid var(--paper-edge);
}

dialog.src-popup .popup__section:last-child { border-bottom: none; padding-bottom: 0; }

dialog.src-popup .popup__section h4 {
    font-family: 'IBM Plex Sans', sans-serif;
    font-weight: 600;
    font-size: 0.74rem;
    text-transform: uppercase;
    letter-spacing: 0.14em;
    color: var(--ink-mute);
    margin: 0 0 2mm;
}

dialog.src-popup .popup__section p {
    margin: 0 0 2mm;
    font-family: 'IBM Plex Serif', serif;
    font-size: 0.92rem;
}

dialog.src-popup pre {
    margin: 0;
    background: var(--paper-soft);
    font-size: 0.78rem;
}

dialog.src-popup .popup__downloads {
    display: grid;
    gap: 2mm;
    list-style: none;
    padding: 0;
    margin: 0;
}

dialog.src-popup .popup__downloads li { margin: 0; padding: 0; }
dialog.src-popup .popup__downloads li::before { content: none; }

dialog.src-popup .popup__downloads a {
    display: grid;
    grid-template-columns: 1fr auto;
    align-items: center;
    padding: 2.5mm 4mm;
    border: 1px solid var(--paper-edge);
    background: var(--paper-soft);
    color: var(--ink);
    text-decoration: none;
    font-family: 'IBM Plex Mono', monospace;
    font-size: 0.78rem;
    transition: background 0.15s, border-color 0.15s;
}

dialog.src-popup .popup__downloads a:hover {
    background: var(--accent-soft);
    border-color: var(--accent);
}

dialog.src-popup .popup__downloads .file-meta {
    color: var(--ink-mute);
    font-size: 0.7rem;
    text-transform: uppercase;
    letter-spacing: 0.08em;
}

/* --- Footer --------------------------------------------------------------*/
.footer {
    margin: 0;
    padding: 8mm 14mm;
    border-top: 4px double var(--ink);
    background: var(--paper);
    font-family: 'IBM Plex Sans', sans-serif;
    font-size: 0.78rem;
    color: var(--ink-soft);
}

.footer p { margin: 1.5mm 0; max-width: 90ch; }

/* Utility */
.dim { opacity: 0.7; }

/* Mobile tweaks */
@media (max-width: 1020px) {
    .toc {
        position: static;
        height: auto;
        border-right: none;
        border-bottom: 1px solid var(--paper-edge);
        padding: 8mm 6mm;
    }
    .content { padding: 8mm 6mm; }
    .cover { padding: 14mm 8mm; }
}