/* HyMo documentation — "dark bench notebook" design system.
   ---------------------------------------------------------------------
   The engineer's clipboard translated to night mode: espresso-graphite
   paper, warm-bone ink, and the two warm marks kept from the daylight
   edition —

     • terracotta   the "one active anomaly" mark: active nav tick,
                    model number, hover arrows, active pulse glints.
     • olive        the structural warm (coordinate stamps, § prefixes,
                    hairlines on critical paths).

     • One typeface: JetBrains Mono runs everything — headings, prose,
       labels, coordinates, code. This is a code-centric portal.

     • The index hero is a Breathing Field: the 3:1 hybrid recurrence
       (24 Gated Delta Net linear layers ⇄ 8 Multi-Head Latent Attention
       full-attention anchors with 16+1 Asymmetric MoE). Below the
       datasheet sits the live full training pass figure. Both are the
       portal's signatures.

   Dark-only by design; there is no light theme. This file is the single
   source of truth; `scripts/build_docs_html.py` copies it into
   `docs_html/assets/style.css` during the build. */



/* =====================================================================
   1. TOKENS
   ===================================================================== */

:root {
    /* Espresso-graphite paper, three planes deep. */
    --paper:         #12100d;     /* page */
    --paper-2:       #161310;     /* card / sidebar plane */
    --paper-3:       #1a1712;     /* raised plane */
    --ink:           #d8ccb4;     /* warm-bone ink */
    --ink-soft:      #b3a68c;
    --ink-faint:     #7a7160;

    /* Hairlines, ticks, the structural lines. */
    --rule:          #2c261c;     /* warm graphite hairline */
    --rule-strong:   #3a3226;     /* the structural rule */
    --rule-mark:     #c9a35c;     /* dim gold for printed marks */

    /* Two warm marks, carried over from the daylight edition. */
    --terracotta:    #e07a3f;     /* the "one active anomaly" mark */
    --terracotta-tint: rgba(224, 122, 63, 0.10);
    --terracotta-glow: rgba(224, 122, 63, 0.35);
    --olive:         #9a9440;     /* structural olive (AA on graphite) */
    --olive-tint:    rgba(154, 148, 64, 0.12);

    /* Math/code surface — sunk one plane below the body paper. */
    --code-paper:    #0e0c0a;
    --code-rule:     #2c261c;

    /* Header chrome */
    --header-bg:     rgba(18, 16, 13, 0.88);

    /* Status callouts */
    --callout-note-bg:    rgba(201, 163, 92, 0.06);
    --callout-note-rule:  #c9a35c;
    --callout-tip-bg:     rgba(224, 122, 63, 0.07);
    --callout-tip-rule:   #e07a3f;
    --callout-warn-bg:    rgba(232, 96, 110, 0.07);
    --callout-warn-rule:  #e8606e;

    /* Subtle warm tints — used for hover, code chips, table hover, etc.
       These are the *paper* tones, not the ink marks. */
    --tint-warm-04:   rgba(216, 204, 180, 0.04);
    --tint-warm-08:   rgba(216, 204, 180, 0.08);
    --tint-warm-12:   rgba(216, 204, 180, 0.12);
    --tint-terra-04:  rgba(224, 122, 63, 0.05);
    --tint-terra-14:  rgba(224, 122, 63, 0.18);
    --tint-ink-04:    rgba(216, 204, 180, 0.05);

    /* Hairline at finer weights, for nested structure (cards within a grid,
       rows within a card, etc.). */
    --rule-fine:       #221d15;
    --rule-fade:       rgba(58, 50, 38, 0.5);

    /* Inset paper — the "even more recessed" plane used for the spec sheet
       cells, code blocks, callouts, and any element that sits below the
       main paper surface. */
    --paper-inset:    #0e0c0a;

    /* Motion: one consistent timing voice. Slow enough to feel deliberate,
       fast enough not to drag. */
    --t-fast:    140ms;
    --t-base:    200ms;
    --t-slow:    350ms;
    --ease:      cubic-bezier(0.4, 0, 0.2, 1);

    /* Focus ring — explicit, never rely on the UA default. */
    --focus-ring:    0 0 0 2px var(--paper), 0 0 0 4px var(--terracotta);

    /* Type families — one voice: JetBrains Mono runs everything. */
    --font-mono:     'JetBrains Mono', ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
    --font-prose:    var(--font-mono);

    /* Mono features shared by every label/number/coord role: tabular figures
       so columns line up, slashed zero so "0" doesn't read as "O". */
    --mono-feats: "tnum" 1, "zero" 1, "ss01" 1;
}



/* =====================================================================
   2. RESET
   ===================================================================== */

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

html { -webkit-text-size-adjust: 100%; }

body {
    margin: 0;
    background-color: var(--paper);
    color: var(--ink);
    font-family: var(--font-prose);
    font-size: 16px;
    line-height: 1.62;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    font-feature-settings: "kern", "liga", "onum", "calt";
    text-rendering: optimizeLegibility;
}

/* Themed scrollbar — small detail, but a generic UA scrollbar on warm
   manila paper is jarring. */
* { scrollbar-width: thin; scrollbar-color: var(--rule-strong) transparent; }
*::-webkit-scrollbar { width: 10px; height: 10px; }
*::-webkit-scrollbar-track { background: transparent; }
*::-webkit-scrollbar-thumb {
    background: var(--rule-fade);
    border: 3px solid var(--paper);
    border-radius: 0;
}
*::-webkit-scrollbar-thumb:hover { background: var(--rule-strong); }

/* Faint ruled grid like a notebook — vertical lines every 32px and a
   horizontal line every 36px, only visible at very low opacity. Gives
   the page its "engineer's paper" texture without dominating it. */
body::before {
    content: "";
    position: fixed;
    inset: 0;
    pointer-events: none;
    z-index: 1;
    background-image:
        repeating-linear-gradient(to right,
            transparent 0,
            transparent 31px,
            rgba(216, 204, 180, 0.028) 31px,
            rgba(216, 204, 180, 0.028) 32px),
        repeating-linear-gradient(to bottom,
            transparent 0,
            transparent 35px,
            rgba(216, 204, 180, 0.022) 35px,
            rgba(216, 204, 180, 0.022) 36px);
}

.site-header, .app-layout, .hero-banner, .toc-sidebar, .sidebar {
    position: relative;
    z-index: 2;
}

/* Boot overlay — a 350ms "loading weights" plate that fades on
   DOMContentLoaded. Respects prefers-reduced-motion (drops straight to
   invisible). Lives on every page so reloads feel coherent. */
#boot-overlay {
    position: fixed;
    inset: 0;
    z-index: 9999;
    background: var(--paper);
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: var(--font-mono);
    color: var(--ink);
    transition: opacity var(--t-fast) var(--ease), visibility var(--t-fast) var(--ease);
}
.boot-inner { text-align: center; }
.boot-wordmark {
    font-size: 1.1rem;
    font-weight: 700;
    letter-spacing: 0.16em;
    color: var(--ink);
    margin-bottom: 0.8rem;
    font-feature-settings: var(--mono-feats);
}
.boot-line {
    font-size: 0.76rem;
    color: var(--ink-faint);
    letter-spacing: 0.08em;
    text-transform: uppercase;
    font-feature-settings: var(--mono-feats);
}
.boot-bar { color: var(--terracotta); font-weight: 600; }
.boot-fading { opacity: 0; pointer-events: none; }



/* =====================================================================
   3. TYPE
   ===================================================================== */

.brand-name, .doc-title, .hero-title, .hero-coords, .ascii-hero,
.portal-section-mark, .portal-section-title,
.portal-section-meta, .card-heading, .card-tag, .nav-card .card-title,
.nav-card .card-label, .nav-group-title, .nav-link, .toc-title,
.toc-link, .breadcrumb, .doc-meta, .meta-item,
.code-header, .code-lang, .copy-btn, .code-wrapper pre,
.inline-code, .math-block,
.spec-sheet-rule, .spec-key, .spec-val, .spec-val .unit,
.heading-anchor, .hero-subtitle,
.callout-header, .callout-title,
.brand-badge, .header-link,
.mobile-toggle, .sidebar-search input,
.doc-footer-nav {
    font-family: var(--font-mono);
}

.markdown-body p,
.markdown-body li,
.markdown-body blockquote,
.hero-subtitle,
.card-desc {
    font-family: var(--font-prose);
}

p { margin: 0 0 1.1em 0; }

a {
    color: var(--rule-mark);
    text-decoration: underline;
    text-underline-offset: 3px;
    text-decoration-thickness: 1px;
    text-decoration-color: var(--rule);
    transition: color var(--t-fast) var(--ease), text-decoration-color var(--t-fast) var(--ease);
}
a:hover { color: var(--terracotta); text-decoration-color: var(--terracotta); }

::selection { background: var(--tint-warm-12); color: var(--ink); }

/* Global focus ring — never rely on the UA default. */
:focus-visible {
    outline: none;
    box-shadow: var(--focus-ring);
    border-radius: 1px;
}
/* The nav links already have their own border-left; keep the ring on the
   outer edge so the active tick stays the dominant affordance. */
.nav-link:focus-visible,
.toc-link:focus-visible,
.header-link:focus-visible,
.mobile-toggle:focus-visible,
.copy-btn:focus-visible {
    box-shadow: 0 0 0 2px var(--paper), 0 0 0 3px var(--terracotta);
}

/* Visually hidden, but available to screen readers and search engines. */
.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}



/* =====================================================================
   4. HEADER CHROME
   ===================================================================== */

.site-header {
    position: sticky;
    top: 0;
    z-index: 50;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.65rem 1.6rem;
    background: var(--header-bg);
    backdrop-filter: blur(14px) saturate(1.05);
    -webkit-backdrop-filter: blur(14px) saturate(1.05);
    border-bottom: 1px solid var(--rule);
    /* A second, finer olive hairline below the warm tan one — reads as
       "the page above is the field, the page below is the body of the
       notebook" without being a heavy double border. */
    box-shadow: inset 0 -1px 0 var(--rule-fine);
}

.header-left {
    display: flex;
    align-items: center;
    gap: 1.2rem;
}

.brand-logo {
    display: flex;
    align-items: baseline;
    gap: 0.7rem;
    text-decoration: none;
    color: var(--ink);
    position: relative;
}
.brand-logo::before {
    /* small olive tick to the left of the brand — same family as the
       terracotta active state, just quieter. */
    content: "";
    display: inline-block;
    width: 3px;
    height: 0.95rem;
    background: var(--olive);
    margin-right: 0.45rem;
    transform: translateY(2px);
    opacity: 0.75;
}

.brand-name {
    font-size: 0.95rem;
    font-weight: 700;
    letter-spacing: -0.01em;
    font-feature-settings: var(--mono-feats);
}

.brand-badge {
    font-size: 0.62rem;
    padding: 3px 8px;
    border: 1px solid var(--rule-strong);
    color: var(--ink-faint);
    font-weight: 600;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    border-radius: 0;
    background: var(--tint-warm-04);
    font-feature-settings: var(--mono-feats);
    /* Stamped look — same as the spec sheet key */
    position: relative;
    top: -1px;
}

.header-right { display: flex; align-items: center; gap: 1.1rem; }

.header-link {
    color: var(--ink-faint);
    text-decoration: none;
    font-size: 0.82rem;
    font-weight: 500;
    padding: 4px 2px;
    border-bottom: 1px solid transparent;
    transition: color var(--t-fast) var(--ease), border-color var(--t-fast) var(--ease);
    font-feature-settings: var(--mono-feats);
}
.header-link:hover { color: var(--terracotta); border-bottom-color: var(--terracotta); }

.mobile-toggle {
    background: var(--tint-warm-04);
    border: 1px solid var(--rule-strong);
    color: var(--ink-faint);
    padding: 5px 11px;
    border-radius: 0;
    cursor: pointer;
    font-size: 0.74rem;
    font-weight: 500;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    font-family: var(--font-mono);
    font-feature-settings: var(--mono-feats);
    transition: color var(--t-fast) var(--ease), border-color var(--t-fast) var(--ease), background var(--t-fast) var(--ease);
}
.mobile-toggle:hover {
    color: var(--ink);
    border-color: var(--rule-mark);
    background: var(--tint-warm-08);
}

.mobile-toggle { display: none; }



/* =====================================================================
   5. APP LAYOUT
   ===================================================================== */

.app-layout {
    display: grid;
    grid-template-columns: 264px minmax(0, 1fr) 232px;
    max-width: 1560px;
    margin: 0 auto;
    min-height: calc(100vh - 50px);
}

.index-portal .app-layout,
.app-layout:not(:has(.toc-sidebar)) {
    grid-template-columns: 264px minmax(0, 1fr);
    max-width: 1560px;
    margin: 0 auto;
}

/* Index portal: single full-width column so the hero gets to breathe.
   The notebook reads as a wide field; capping at 860px makes the hero
   (telemetry ribbon, figures, spec sheet) feel cramped on desktop. */
.index-portal .content-container {
    max-width: 1120px;
    margin: 0 auto;
    width: 100%;
}

.index-portal .main-content {
    padding: 2.5rem 2.5rem 4rem;
}

.sidebar {
    border-right: 1px solid var(--rule);
    background: var(--paper-2);
    position: sticky;
    top: 50px;
    height: calc(100vh - 50px);
    overflow-y: auto;
}

.sidebar-inner { padding: 1.3rem 1.1rem; }

.sidebar-search {
    position: relative;
    margin-bottom: 1.5rem;
}
.sidebar-search::before {
    /* magnifier glyph drawn in CSS so we don't need an icon font */
    content: "";
    position: absolute;
    left: 10px;
    top: 50%;
    width: 8px;
    height: 8px;
    border: 1.4px solid var(--ink-faint);
    border-radius: 50%;
    transform: translateY(-65%) translateX(0);
    pointer-events: none;
    opacity: 0.7;
}
.sidebar-search::after {
    content: "";
    position: absolute;
    left: 17px;
    top: 50%;
    width: 4px;
    height: 1.4px;
    background: var(--ink-faint);
    transform: translateY(2px) rotate(45deg);
    transform-origin: left center;
    pointer-events: none;
    opacity: 0.7;
}
.sidebar-search input {
    width: 100%;
    padding: 7px 11px 7px 28px;
    background: var(--paper);
    border: 1px solid var(--rule-strong);
    border-radius: 0;
    color: var(--ink);
    font-family: var(--font-mono);
    font-size: 0.78rem;
    font-feature-settings: var(--mono-feats);
    outline: none;
    transition: border-color var(--t-fast) var(--ease), background var(--t-fast) var(--ease);
}
.sidebar-search input:focus { border-color: var(--rule-mark); background: var(--paper-inset); }
.sidebar-search input::placeholder { color: var(--ink-faint); }

.nav-group { margin-bottom: 1.6rem; }

.nav-group-title {
    font-size: 0.68rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.16em;
    color: var(--ink-faint);
    margin-bottom: 0.5rem;
    padding: 2px 0 2px 10px;
    border-left: 2px solid var(--rule-strong);
    position: relative;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-feature-settings: var(--mono-feats);
}
.nav-group-title::after {
    /* a fine olive hairline that fills the rest of the row, so the group
       title looks stamped onto a ruled bar. */
    content: "";
    flex: 1;
    height: 1px;
    background: var(--rule-fade);
}

.nav-list { list-style: none; margin: 0; padding: 0; }
.nav-item { margin: 0; counter-increment: navitem; }

.nav-link {
    display: flex;
    align-items: center;
    gap: 0.55rem;
    padding: 6px 10px;
    color: var(--ink-faint);
    text-decoration: none;
    font-size: 0.82rem;
    font-weight: 400;
    line-height: 1.4;
    border-left: 2px solid transparent;
    margin-left: -2px;
    transition: color var(--t-fast) var(--ease), border-color var(--t-fast) var(--ease), background var(--t-fast) var(--ease);
    position: relative;
    min-width: 0;
}
.nav-link-text {
    flex: 1 1 auto;
    min-width: 0;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}
.nav-link::before {
    content: counter(navitem, decimal-leading-zero);
    color: var(--ink-faint);
    font-size: 0.66rem;
    flex: 0 0 auto;
    letter-spacing: 0.04em;
    opacity: 0.55;
    font-feature-settings: var(--mono-feats);
    transition: color var(--t-fast) var(--ease), opacity var(--t-fast) var(--ease);
}
.nav-link:hover {
    color: var(--ink);
    background: var(--tint-warm-04);
}
.nav-link:hover::before { opacity: 0.95; }

.nav-link.active {
    color: var(--terracotta);
    border-left-color: var(--terracotta);
    background: var(--tint-terra-04);
    font-weight: 500;
}
.nav-link.active::before { color: var(--terracotta); opacity: 1; }
.nav-link.active::after {
    /* tiny terracotta dot at the right edge — a printer's mark, anchors
       the active item even when the text gets truncated. */
    content: "";
    position: absolute;
    right: 10px;
    top: 50%;
    width: 4px;
    height: 4px;
    background: var(--terracotta);
    transform: translateY(-50%);
    border-radius: 0;
}

.toc-sidebar {
    border-left: 1px solid var(--rule);
    background: var(--paper-2);
    padding: 1.4rem 1rem 1.5rem;
    position: sticky;
    top: 50px;
    height: calc(100vh - 50px);
    overflow-y: auto;
}
.toc-inner { position: relative; }
.toc-title {
    font-size: 0.68rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.16em;
    color: var(--ink-faint);
    margin-bottom: 0.8rem;
    padding-bottom: 0.55rem;
    border-bottom: 1px solid var(--rule-fine);
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-feature-settings: var(--mono-feats);
}
.toc-title::before {
    /* a small § mark on every TOC title, matching the heading prefix. */
    content: "§";
    color: var(--olive);
    font-size: 0.9em;
    font-weight: 400;
}
.toc-list { list-style: none; margin: 0; padding: 0; }
.toc-list li { margin-bottom: 2px; }
.toc-link {
    color: var(--ink-faint);
    text-decoration: none;
    font-size: 0.76rem;
    line-height: 1.45;
    display: block;
    padding: 3px 0 3px 8px;
    border-left: 2px solid transparent;
    margin-left: -2px;
    transition: color var(--t-fast) var(--ease), border-color var(--t-fast) var(--ease), background var(--t-fast) var(--ease);
    font-feature-settings: var(--mono-feats);
}
.toc-link:hover { color: var(--ink); background: var(--tint-warm-04); }
.toc-link.active {
    color: var(--terracotta);
    border-left-color: var(--terracotta);
    background: var(--tint-terra-04);
    font-weight: 500;
}
.toc-h3 { padding-left: 0.85rem; }
.toc-h3 .toc-link { color: var(--ink-faint); opacity: 0.85; font-size: 0.73rem; }
.toc-h3 .toc-link.active { color: var(--terracotta); opacity: 1; }
.toc-empty {
    font-family: var(--font-mono);
    font-size: 0.74rem;
    color: var(--ink-faint);
    font-style: italic;
    opacity: 0.7;
    padding: 0.4rem 0 0.2rem;
}

.main-content {
    padding: 2.5rem 3rem 4rem;
    overflow-x: hidden;
    background: var(--paper);
    /* A barely-there vertical olive guide running the full content
       column — it sits on the left margin of the prose and reads as
       a "ruled margin" of the notebook page. */
    position: relative;
}
.main-content::before {
    content: "";
    position: absolute;
    top: 0;
    bottom: 0;
    left: 26px;
    width: 1px;
    background: var(--rule-fade);
    pointer-events: none;
    opacity: 0.6;
}

.content-container { max-width: 760px; margin: 0 auto; position: relative; z-index: 1; }

.breadcrumb {
    font-size: 0.72rem;
    color: var(--ink-faint);
    margin-bottom: 0.9rem;
    letter-spacing: 0.04em;
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 0;
    text-transform: uppercase;
    font-feature-settings: var(--mono-feats);
}
.breadcrumb a {
    color: var(--ink-faint);
    text-decoration: none;
    border-bottom: 1px solid transparent;
    transition: color var(--t-fast) var(--ease), border-color var(--t-fast) var(--ease);
}
.breadcrumb a:hover { color: var(--ink); border-bottom-color: var(--terracotta); }
.breadcrumb .current { color: var(--ink); font-weight: 500; }
.breadcrumb span + span::before {
    content: "›";
    margin: 0 0.55rem;
    color: var(--ink-faint);
    opacity: 0.45;
    font-weight: 400;
}



/* =====================================================================
   6. DOC TITLE BLOCK
   ===================================================================== */

.doc-header {
    border-top: 1px solid var(--rule);
    border-bottom: 1px solid var(--rule);
    padding: 1.7rem 0 1.4rem;
    margin-bottom: 2.3rem;
    position: relative;
}

.doc-header::before {
    content: "§ FIELD NOTE · " attr(data-doc-tag, page);
    position: absolute;
    top: -0.7rem;
    left: 0;
    background: var(--paper);
    padding: 0 0.6rem;
    color: var(--olive);
    font-family: var(--font-mono);
    font-size: 0.66rem;
    letter-spacing: 0.18em;
    text-transform: uppercase;
    font-weight: 500;
    font-feature-settings: var(--mono-feats);
}
.doc-header::after {
    /* a small terracotta tick at the right end of the doc-header rule —
       ties the page to the same accent as the active nav item. */
    content: "";
    position: absolute;
    right: 0;
    top: -3px;
    width: 6px;
    height: 6px;
    background: var(--terracotta);
    border-radius: 0;
}

.doc-title {
    font-size: 2.05rem;
    font-weight: 600;
    line-height: 1.12;
    letter-spacing: -0.018em;
    margin: 0 0 1rem;
    color: var(--ink);
    font-feature-settings: "kern", "liga";
}

.doc-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 0 1.4rem;
    font-size: 0.7rem;
    color: var(--ink-faint);
    letter-spacing: 0.02em;
    text-transform: uppercase;
    font-feature-settings: var(--mono-feats);
}
.doc-meta .meta-item {
    display: inline-flex;
    align-items: center;
    gap: 0.45rem;
    padding: 3px 9px 3px 0;
    border-right: 1px solid var(--rule-fine);
}
.doc-meta .meta-mark {
    color: var(--olive);
    font-weight: 600;
    font-size: 0.78rem;
}
.doc-meta .meta-item:last-child { border-right: none; padding-right: 0; }
.doc-meta .meta-label { color: var(--ink-faint); opacity: 0.75; }
.doc-meta .meta-val { color: var(--ink-soft); font-weight: 500; }

.doc-anchor { display: block; height: 0; scroll-margin-top: 80px; }



/* =====================================================================
   7. HERO (INDEX ONLY)
   ===================================================================== */

.hero-banner {
    padding: 2rem 2.2rem 2.2rem;
    background: var(--paper-2);
    border: 1px solid var(--rule-strong);
    border-radius: 0;
    margin-bottom: 2rem;
    position: relative;
    box-shadow: inset 0 0 0 1px var(--tint-warm-04);
}

.hero-filed {
    display: flex;
    align-items: center;
    gap: 0.4rem;
    font-family: var(--font-mono);
    font-size: 0.62rem;
    color: var(--ink-faint);
    letter-spacing: 0.14em;
    text-transform: uppercase;
    margin-bottom: 0.4rem;
    font-feature-settings: var(--mono-feats);
}
.hero-filed-key { color: var(--olive); font-weight: 600; }
.hero-filed-sep { margin: 0 0.2rem; opacity: 0.4; }

.hero-coords {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem 0;
    font-family: var(--font-mono);
    font-size: 0.66rem;
    color: var(--olive);
    letter-spacing: 0.1em;
    margin-bottom: 1.2rem;
    margin-top: 0.2rem;
    text-transform: uppercase;
    padding-bottom: 0.6rem;
    border-bottom: 1px dashed var(--rule);
    font-feature-settings: var(--mono-feats);
}
.hero-coords .coord { color: var(--ink-faint); display: inline-flex; align-items: center; gap: 0.3rem; }
.hero-coords .coord::before { content: "·"; color: var(--ink-faint); opacity: 0.4; margin-right: 0.3rem; }
.hero-coords .coord:first-child::before { display: none; }
.hero-coords .coord-sep { display: none; }

.hero-title {
    font-family: var(--font-mono);
    font-size: 2.95rem;
    font-weight: 700;
    letter-spacing: -0.025em;
    line-height: 1.06;
    margin: 0 0 0.65rem;
    color: var(--ink);
    font-feature-settings: "tnum" 1, "ss01" 1;
    display: flex;
    align-items: baseline;
    flex-wrap: wrap;
    gap: 0 0.42rem;
}
.hero-title-em { color: var(--ink-faint); font-weight: 500; }
.hero-title-em-accent {
    color: var(--terracotta);
    font-weight: 600;
    position: relative;
    padding: 0 1px;
    font-feature-settings: "tnum" 1, "ss01" 1;
}
/* The signature: a thin terracotta underline + a tiny corner tick,
   like the printer's mark stamped next to an active figure label. */
.hero-title-em-accent::after {
    content: "";
    position: absolute;
    left: 0;
    right: 0;
    bottom: -0.18em;
    height: 1px;
    background: var(--terracotta);
    opacity: 0.6;
}
.hero-title-em-accent::before {
    content: "";
    position: absolute;
    left: -0.55rem;
    top: 0.32em;
    width: 5px;
    height: 5px;
    background: var(--terracotta);
    border-radius: 0;
    box-shadow: 0 0 6px var(--terracotta-glow);
}

.hero-subtitle {
    font-family: var(--font-prose);
    font-size: 1.08rem;
    color: var(--ink-soft);
    line-height: 1.62;
    max-width: 1080px;
    margin: 0 0 2rem;
    font-feature-settings: "kern", "liga";
    text-wrap: pretty;
    hyphens: auto;
}

/* =====================================================================
   7. FIGURES — Dual-Trace Oscilloscope & Logic-Analyzer Aesthetic
   =====================================================================
   The two signature canvases are re-imagined as precision instruments:
   Fig A0 reads as a hybrid-architecture oscilloscope (vertical stack +
   crosshair), Fig A1 reads as a training-pipeline logic analyzer
   (horizontal time-axis + scanlines). Both share the same chrome language
   — stepped borders, corner-bracket HUDs, physical button styling, and
   CRT-style scanline overlays — but are tuned to their direction. */

/* ── Shared instrument chrome ─────────────────────────────────────── */

/* Stepped border treatment: a 3px outer frame + 1px inner hairline,
   evoking a front-panel bezel. */
.hero-figure,
.pass-widget {
    position: relative;
    background: var(--paper-inset);
    box-shadow:
        inset 0 2px 6px rgba(0, 0, 0, 0.6),
        0 4px 16px rgba(0, 0, 0, 0.35),
        inset 0 0 0 1px var(--rule-fine);
}
.hero-figure {
    margin: 0.8rem 0 1.8rem;
    border: 3px solid var(--paper-2);
    outline: 1px solid var(--rule-strong);
    outline-offset: -2px;
}
.pass-widget {
    margin-top: 1.8rem;
    border: 3px solid var(--paper-2);
    outline: 1px solid var(--rule-strong);
    outline-offset: -2px;
}

/* A thin vertical status strip on the left edge of each figure,
   like a front-panel status LED bar. */
.hero-figure::before {
    content: "";
    position: absolute;
    top: 0;
    bottom: 0;
    left: 0;
    width: 3px;
    background: linear-gradient(to bottom,
        var(--olive) 0%, var(--olive) 25%,
        transparent 25%, transparent 40%,
        var(--terracotta) 40%, var(--terracotta) 60%,
        transparent 60%, transparent 75%,
        var(--rule-mark) 75%, var(--rule-mark) 100%);
    opacity: 0.6;
    z-index: 3;
}
.pass-widget::before {
    content: "";
    position: absolute;
    top: 0;
    bottom: 0;
    left: 0;
    width: 3px;
    background: linear-gradient(to bottom,
        var(--terracotta) 0%, var(--terracotta) 35%,
        transparent 35%, transparent 55%,
        var(--olive) 55%, var(--olive) 80%,
        transparent 80%, transparent 100%);
    opacity: 0.6;
    z-index: 3;
}

/* ── FIG. A0 Header ─────────────────────────────────────────────── */

.hero-figure-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 0.6rem 1rem;
    padding: 0.55rem 0.9rem 0.55rem 1.1rem; /* extra left for status strip */
    background: var(--paper-2);
    border-bottom: 1px solid var(--rule);
    position: relative;
}

.fig-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    font-family: var(--font-mono);
    font-size: 0.65rem;
    letter-spacing: 0.12em;
    text-transform: uppercase;
}

.fig-dot {
    width: 7px;
    height: 7px;
    border-radius: 50%;
    background: var(--olive);
    box-shadow: 0 0 6px var(--olive), inset 0 1px 1px rgba(255,255,255,0.2);
    animation: figDotPulse 2s infinite ease-in-out;
}
@keyframes figDotPulse {
    0%, 100% { opacity: 0.35; transform: scale(0.85); }
    50% { opacity: 1.0; transform: scale(1.2); filter: drop-shadow(0 0 4px var(--olive)); }
}

.fig-tag {
    color: var(--olive);
    font-weight: 700;
    text-shadow: 0 0 6px rgba(154,148,64,0.25);
}
.fig-sep {
    color: var(--ink-faint);
    opacity: 0.4;
    font-weight: 300;
}
.fig-title {
    color: var(--ink);
    font-weight: 600;
}
.fig-dim {
    color: var(--ink-faint);
    font-size: 0.58rem;
    letter-spacing: 0.08em;
    font-weight: 500;
}

/* Segmented button group: mode switches that look like physical
   instrument toggles. Connected, with shared borders. */
.fig-controls {
    display: inline-flex;
    align-items: center;
    gap: 0;
    border: 1px solid var(--rule);
    background: var(--paper-inset);
}

.fig-btn {
    background: linear-gradient(180deg, var(--paper-3) 0%, var(--paper-inset) 100%);
    border: none;
    border-right: 1px solid var(--rule);
    color: var(--ink-faint);
    font-family: var(--font-mono);
    font-size: 0.56rem;
    font-weight: 600;
    letter-spacing: 0.07em;
    padding: 0.38rem 0.6rem;
    cursor: pointer;
    transition: all var(--t-fast) var(--ease);
    user-select: none;
    box-shadow: inset 0 1px 0 rgba(255,255,255,0.03);
    text-transform: uppercase;
}
.fig-btn:last-child { border-right: none; }

.fig-btn:hover {
    background: linear-gradient(180deg, var(--tint-warm-08) 0%, var(--tint-warm-04) 100%);
    color: var(--ink);
}

.fig-btn.active {
    background: linear-gradient(180deg, var(--tint-terra-14) 0%, rgba(224,122,63,0.18) 100%);
    color: var(--terracotta);
    box-shadow: inset 0 2px 4px rgba(0,0,0,0.3), 0 0 6px var(--terracotta-tint);
}

.fig-btn-icon {
    padding: 0.38rem 0.5rem;
    font-size: 0.52rem;
}

/* ── FIG. A0 Canvas & Overlays ────────────────────────────────────── */

.fig-canvas-wrap {
    position: relative;
    width: 100%;
    height: 360px;
    background:
        radial-gradient(ellipse at center, rgba(23,19,15,0.9) 0%, rgba(14,12,10,0.95) 60%, rgba(8,7,6,1) 100%),
        var(--paper-inset);
    overflow: hidden;
    cursor: crosshair;
}

/* CRT scanline overlay */
.fig-canvas-wrap::after {
    content: "";
    position: absolute;
    inset: 0;
    pointer-events: none;
    z-index: 5;
    background: repeating-linear-gradient(
        to bottom,
        transparent 0px,
        transparent 3px,
        rgba(0, 0, 0, 0.18) 3px,
        rgba(0, 0, 0, 0.18) 6px
    );
    opacity: 0.7;
}

/* Crosshair at centre — the oscilloscope reticle */
.fig-canvas-wrap::before {
    content: "";
    position: absolute;
    top: 50%;
    left: 50%;
    width: 120px;
    height: 120px;
    transform: translate(-50%, -50%);
    pointer-events: none;
    z-index: 4;
    border: 1px solid rgba(154, 148, 64, 0.08);
    border-radius: 50%;
}

.hero-canvas {
    display: block;
    width: 100%;
    height: 100%;
}

.fig-overlay-hud {
    position: absolute;
    inset: 0;
    pointer-events: none;
    z-index: 6;
}

/* HUD corners with bracket decorations — like LCD readouts on
   a test instrument. */
.hud-corner {
    position: absolute;
    padding: 0.5rem 0.75rem;
    background: rgba(18, 16, 13, 0.93);
    border: 1px solid var(--rule-strong);
    font-family: var(--font-mono);
    line-height: 1.35;
    box-shadow: 0 2px 8px rgba(0,0,0,0.5);
}

/* Corner bracket marks */
.hud-corner::before,
.hud-corner::after {
    content: "";
    position: absolute;
    width: 5px;
    height: 5px;
    border-color: var(--olive);
    opacity: 0.6;
}
.hud-corner::before {
    top: -1px;
    left: -1px;
    border-top: 1px solid var(--olive);
    border-left: 1px solid var(--olive);
}
.hud-corner::after {
    bottom: -1px;
    right: -1px;
    border-bottom: 1px solid var(--olive);
    border-right: 1px solid var(--olive);
}

.hud-corner.top-left { top: 10px; left: 12px; }
.hud-corner.top-right { top: 10px; right: 10px; text-align: right; }
.hud-corner.bottom-left { bottom: 10px; left: 12px; }
.hud-corner.bottom-right { bottom: 10px; right: 10px; text-align: right; }

.hud-lbl {
    display: block;
    color: var(--ink-faint);
    font-size: 0.56rem;
    font-weight: 600;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    margin-bottom: 3px;
}

.hud-val {
    display: block;
    color: var(--ink);
    font-size: 0.70rem;
    font-weight: 600;
    font-feature-settings: var(--mono-feats);
}
.hud-val .unit {
    color: var(--ink-faint);
    font-size: 0.85em;
    font-weight: 400;
}
.hud-val .num {
    color: var(--terracotta);
    font-weight: 700;
}

/* Probe card — measurement cursor readout */
.hud-probe {
    position: absolute;
    pointer-events: none;
    transition: opacity 0.12s ease;
    z-index: 30;
    transform: translate(-50%, -100%);
    margin-top: -10px;
}

.probe-card {
    background: rgba(18, 16, 13, 0.97);
    border: 1px solid var(--rule-mark);
    border-left: 3px solid var(--rule-mark);
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.7), 0 0 12px rgba(201, 163, 92, 0.15);
    padding: 0.55rem 0.85rem;
    font-family: var(--font-mono);
    line-height: 1.4;
    white-space: nowrap;
    position: relative;
}
/* A small leader-line triangle pointing down to the cursor */
.probe-card::after {
    content: "";
    position: absolute;
    bottom: -5px;
    left: 50%;
    transform: translateX(-50%);
    width: 0;
    height: 0;
    border-left: 5px solid transparent;
    border-right: 5px solid transparent;
    border-top: 5px solid var(--rule-mark);
}

.probe-tag {
    display: block;
    color: var(--rule-mark);
    font-size: 0.64rem;
    font-weight: 700;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    margin-bottom: 3px;
}
.probe-val {
    display: block;
    color: var(--ink);
    font-size: 0.72rem;
    font-weight: 600;
    font-feature-settings: var(--mono-feats);
}
.probe-sub {
    display: block;
    color: var(--olive);
    font-size: 0.62rem;
    margin-top: 3px;
    letter-spacing: 0.04em;
}

/* ── FIG. A0 Footer ──────────────────────────────────────────────── */

.hero-figure-footer {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 0.5rem 1rem;
    padding: 0.55rem 0.9rem 0.55rem 1.1rem;
    background: var(--paper-2);
    border-top: 1px solid var(--rule);
    font-family: var(--font-mono);
    font-size: 0.70rem;
}

.fig-formula {
    display: inline-flex;
    align-items: center;
    gap: 0.3rem;
    color: var(--ink);
    letter-spacing: 0.04em;
    font-size: 0.74rem;
    padding: 0.25rem 0.6rem;
    background: var(--paper-inset);
    border: 1px solid var(--rule-fine);
}

.fig-formula .formula-sym { color: var(--ink); font-weight: 600; }
.fig-formula .formula-op { color: var(--ink-faint); margin: 0 0.1rem; }
.fig-formula .formula-term { color: var(--rule-mark); font-weight: 500; }
.fig-formula .term-a { color: var(--olive); font-weight: 600; }
.fig-formula .term-b { color: var(--terracotta); font-weight: 600; }
.fig-formula .formula-dot { color: var(--ink-faint); }
.fig-formula .f-sub, .fig-legend .f-sub {
    font-size: 0.58rem;
    vertical-align: sub;
    color: var(--ink-soft);
    font-feature-settings: var(--mono-feats);
}

.fig-legend {
    display: inline-flex;
    align-items: center;
    gap: 0.85rem;
    flex-wrap: wrap;
}

.legend-item {
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
    color: var(--ink-soft);
    font-size: 0.64rem;
}

/* LED-style swatches: small rounded rectangles with glow */
.legend-swatch {
    width: 8px;
    height: 4px;
    border-radius: 1px;
    display: inline-block;
}

.legend-swatch.olive {
    background: var(--olive);
    box-shadow: 0 0 4px var(--olive);
}
.legend-swatch.terra {
    background: var(--terracotta);
    box-shadow: 0 0 4px var(--terracotta);
}
.legend-swatch.gold {
    background: var(--rule-mark);
    box-shadow: 0 0 4px var(--rule-mark);
}
.legend-swatch.core {
    background: #fffaf0;
    box-shadow: 0 0 5px var(--terracotta-glow);
}

.legend-hint {
    color: var(--ink-faint);
    font-size: 0.52rem;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    opacity: 0.7;
}

/* ── FIG. A1 — Training Pipeline Logic Analyzer ─────────────────── */

.pass-widget-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 0.6rem 1rem;
    padding: 0.55rem 0.9rem 0.55rem 1.1rem;
    background: var(--paper-2);
    border-bottom: 1px solid var(--rule);
    position: relative;
}

.pass-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    font-family: var(--font-mono);
    font-size: 0.65rem;
    letter-spacing: 0.12em;
    text-transform: uppercase;
}

.pass-dot {
    width: 7px;
    height: 7px;
    border-radius: 50%;
    background: var(--terracotta);
    box-shadow: 0 0 6px var(--terracotta), inset 0 1px 1px rgba(255,255,255,0.2);
    animation: passDotPulse 2s infinite ease-in-out;
}
@keyframes passDotPulse {
    0%, 100% { opacity: 0.35; transform: scale(0.85); }
    50% { opacity: 1.0; transform: scale(1.2); filter: drop-shadow(0 0 4px var(--terracotta)); }
}

.pass-tag {
    color: var(--terracotta);
    font-weight: 700;
    text-shadow: 0 0 6px rgba(224,122,63,0.25);
}
.pass-sep {
    color: var(--ink-faint);
    opacity: 0.4;
    font-weight: 300;
}
.pass-title {
    color: var(--ink);
    font-weight: 600;
}
.pass-dim {
    color: var(--ink-faint);
    font-size: 0.58rem;
    letter-spacing: 0.08em;
    font-weight: 500;
}

/* Segmented phase buttons */
.pass-controls {
    display: inline-flex;
    align-items: center;
    gap: 0;
    border: 1px solid var(--rule);
    background: var(--paper-inset);
}

.pass-btn {
    background: linear-gradient(180deg, var(--paper-3) 0%, var(--paper-inset) 100%);
    border: none;
    border-right: 1px solid var(--rule);
    color: var(--ink-faint);
    font-family: var(--font-mono);
    font-size: 0.56rem;
    font-weight: 600;
    letter-spacing: 0.07em;
    padding: 0.38rem 0.6rem;
    cursor: pointer;
    transition: all var(--t-fast) var(--ease);
    user-select: none;
    box-shadow: inset 0 1px 0 rgba(255,255,255,0.03);
    text-transform: uppercase;
}
.pass-btn:last-child { border-right: none; }

.pass-btn:hover {
    background: linear-gradient(180deg, var(--tint-warm-08) 0%, var(--tint-warm-04) 100%);
    color: var(--ink);
}

.pass-btn.active {
    background: linear-gradient(180deg, var(--tint-terra-14) 0%, rgba(224,122,63,0.18) 100%);
    color: var(--terracotta);
    box-shadow: inset 0 2px 4px rgba(0,0,0,0.3), 0 0 6px var(--terracotta-tint);
}

.pass-btn-icon {
    padding: 0.38rem 0.5rem;
    font-size: 0.52rem;
}

/* ── FIG. A1 Canvas & Overlays ──────────────────────────────────── */

.pass-canvas-wrap {
    position: relative;
    width: 100%;
    height: 270px;
    background:
        radial-gradient(ellipse at center, rgba(23,19,15,0.9) 0%, rgba(14,12,10,0.95) 60%, rgba(8,7,6,1) 100%),
        var(--paper-inset);
    /* visible (not hidden) so the stage tooltip can render above/below
       stations without being clipped against the wrap's top edge.
       The ::before/::after overlays use inset:0 so they stay bounded. */
    overflow: visible;
    cursor: crosshair;
}

/* CRT scanlines — slightly denser than Fig A0 to suggest horizontal sweep */
.pass-canvas-wrap::after {
    content: "";
    position: absolute;
    inset: 0;
    pointer-events: none;
    z-index: 5;
    background: repeating-linear-gradient(
        to bottom,
        transparent 0px,
        transparent 2px,
        rgba(0, 0, 0, 0.2) 2px,
        rgba(0, 0, 0, 0.2) 4px
    );
    opacity: 0.6;
}

/* Time-axis grid: faint vertical ticks evoking a logic-analyzer display */
.pass-canvas-wrap::before {
    content: "";
    position: absolute;
    inset: 0;
    pointer-events: none;
    z-index: 4;
    background: repeating-linear-gradient(
        to right,
        transparent 0px,
        transparent 59px,
        rgba(58, 50, 38, 0.12) 59px,
        rgba(58, 50, 38, 0.12) 60px
    );
}

.pass-canvas {
    display: block;
    width: 100%;
    height: 100%;
}

.pass-overlay-hud {
    position: absolute;
    inset: 0;
    pointer-events: none;
    z-index: 6;
}

/* Phase HUD chips with corner brackets */
.pass-hud-chip {
    position: absolute;
    padding: 0.5rem 0.75rem;
    background: rgba(18, 16, 13, 0.93);
    border: 1px solid var(--rule-strong);
    font-family: var(--font-mono);
    line-height: 1.35;
    box-shadow: 0 2px 8px rgba(0,0,0,0.5);
}

.pass-hud-chip::before,
.pass-hud-chip::after {
    content: "";
    position: absolute;
    width: 5px;
    height: 5px;
    border-color: var(--terracotta);
    opacity: 0.5;
}
.pass-hud-chip::before {
    top: -1px;
    left: -1px;
    border-top: 1px solid var(--terracotta);
    border-left: 1px solid var(--terracotta);
}
.pass-hud-chip::after {
    bottom: -1px;
    right: -1px;
    border-bottom: 1px solid var(--terracotta);
    border-right: 1px solid var(--terracotta);
}

.pass-hud-chip.top-left { top: 10px; left: 12px; }
.pass-hud-chip.top-right { top: 10px; right: 10px; text-align: right; }

.ph-lbl {
    display: block;
    color: var(--ink-faint);
    font-size: 0.56rem;
    font-weight: 600;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    margin-bottom: 3px;
}

.ph-val {
    display: block;
    color: var(--ink);
    font-size: 0.70rem;
    font-weight: 600;
    font-feature-settings: var(--mono-feats);
}

/* Stage tooltip — anchored above the station. Lifted to .pass-widget scope
   (see pass-widget below) so it isn't clipped by the canvas wrap's
   overflow:hidden boundary. */
.pass-stage-tooltip {
    position: absolute;
    pointer-events: none;
    transition: opacity 0.12s ease;
    z-index: 30;
    max-width: calc(100% - 24px);
    transform: translate(-50%, -100%);
    margin-top: -10px;
}

.st-card {
    background: rgba(18, 16, 13, 0.97);
    border: 1px solid var(--rule-mark);
    border-left: 3px solid var(--rule-mark);
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.7), 0 0 12px rgba(201, 163, 92, 0.15);
    padding: 0.55rem 0.85rem;
    font-family: var(--font-mono);
    line-height: 1.4;
    white-space: normal;
    word-break: break-word;
    max-width: 420px;
    position: relative;
}
.st-card::after {
    content: "";
    position: absolute;
    bottom: -5px;
    left: 50%;
    transform: translateX(-50%);
    width: 0;
    height: 0;
    border-left: 5px solid transparent;
    border-right: 5px solid transparent;
    border-top: 5px solid var(--rule-mark);
}

.st-tag {
    display: block;
    color: var(--rule-mark);
    font-size: 0.64rem;
    font-weight: 700;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    margin-bottom: 3px;
}

.st-op {
    display: block;
    color: var(--ink);
    font-size: 0.72rem;
    font-weight: 600;
    font-feature-settings: var(--mono-feats);
}

.st-shape {
    display: block;
    color: var(--terracotta);
    font-size: 0.65rem;
    font-weight: 500;
    margin-top: 3px;
}

.st-desc {
    display: block;
    color: var(--olive);
    font-size: 0.62rem;
    margin-top: 3px;
    letter-spacing: 0.02em;
}

/* ── FIG. A1 Footer ──────────────────────────────────────────────── */

.pass-widget-footer {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 0.5rem 1rem;
    padding: 0.55rem 0.9rem 0.55rem 1.1rem;
    background: var(--paper-2);
    border-top: 1px solid var(--rule);
    font-family: var(--font-mono);
    font-size: 0.70rem;
}

/* Status ticker with a subtle left-border glow */
.pass-status-ticker {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--ink);
    letter-spacing: 0.04em;
    font-size: 0.68rem;
    padding: 0.2rem 0;
    border-left: 2px solid var(--terracotta);
    padding-left: 0.5rem;
}

.ticker-beacon {
    color: var(--terracotta);
    font-size: 1.1em;
    animation: tickerBlink 1.5s infinite ease-in-out;
}
@keyframes tickerBlink {
    0%, 100% { opacity: 0.4; }
    50% { opacity: 1.0; }
}

.ticker-text {
    color: var(--ink);
    font-weight: 500;
}

.pass-legend {
    display: inline-flex;
    align-items: center;
    gap: 0.85rem;
    flex-wrap: wrap;
}
/* ----- The datasheet / spec sheet ------------------------------------- */
.spec-sheet {
    margin: 1.8rem 0;
}
.spec-sheet-rule {
    display: flex;
    justify-content: space-between;
    align-items: baseline;
    border-bottom: 1px solid var(--rule);
    padding-bottom: 0.5rem;
    margin-bottom: 0.9rem;
    font-family: var(--font-mono);
    font-size: 0.7rem;
    letter-spacing: 0.14em;
    text-transform: uppercase;
    position: relative;
    font-feature-settings: var(--mono-feats);
}
.spec-sheet-rule::before {
    content: "✓";
    color: var(--terracotta);
    margin-right: 0.5rem;
    font-weight: 600;
}
.spec-rule-key { color: var(--olive); font-weight: 600; }
.spec-rule-meta { color: var(--ink-faint); font-size: 0.64rem; font-weight: 400; }

.spec-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    border: 1px solid var(--rule-strong);
    border-radius: 0;
    margin: 0;
    background: var(--rule-strong);
    gap: 1px;
}

.spec-cell {
    padding: 0.9rem 1rem 1rem;
    margin: 0;
    background: var(--paper);
    position: relative;
    transition: background var(--t-base) var(--ease);
}
.spec-cell:hover { background: var(--paper-inset); }
.spec-cell::before {
    content: "·";
    position: absolute;
    top: 4px;
    left: 5px;
    color: var(--olive);
    font-family: var(--font-mono);
    font-size: 0.85em;
    opacity: 0;
    transition: opacity var(--t-fast) var(--ease);
}
.spec-cell:hover::before { opacity: 0.6; }

.spec-key {
    font-size: 0.62rem;
    text-transform: uppercase;
    letter-spacing: 0.12em;
    color: var(--ink-faint);
    margin-bottom: 0.5rem;
    font-weight: 500;
    font-feature-settings: var(--mono-feats);
    display: flex;
    align-items: center;
    gap: 0.35rem;
}

.spec-val {
    font-size: 1.05rem;
    font-weight: 700;
    color: var(--ink);
    letter-spacing: -0.018em;
    font-feature-settings: var(--mono-feats);
    display: flex;
    align-items: baseline;
    gap: 2px;
    line-height: 1.05;
}
.spec-val .unit {
    color: var(--ink-faint);
    font-size: 0.7em;
    font-weight: 500;
    margin-left: 3px;
    letter-spacing: 0;
    text-transform: uppercase;
}



/* =====================================================================
   8. PORTAL — section grids (index only)
   ===================================================================== */

/* A subtle "documentation index" preamble that ties the hero block above
   (figures, datasheet, mechanism cards) to the catalog of pages below.
   Without it, the reader drops from the FIG. A1 pass-widget straight into
   card grids with no sense that the page just changed register. */
.portal-content {
    margin-top: 3.5rem;
    padding-top: 1.6rem;
    border-top: 1px dashed var(--rule);
    position: relative;
}
.portal-content::before {
    /* The signpost: a small olive §-stamp in the top-left, like the
       page-number stamp on the first sheet of a new chapter. */
    content: "§ documentation index";
    position: absolute;
    top: -0.6rem;
    left: -1px;
    background: var(--paper);
    padding: 0 0.7rem 0 0.6rem;
    color: var(--olive);
    font-family: var(--font-mono);
    font-size: 0.66rem;
    letter-spacing: 0.18em;
    text-transform: uppercase;
    font-weight: 600;
    font-feature-settings: var(--mono-feats);
    white-space: nowrap;
}

.portal-section { margin-bottom: 3.5rem; }

.portal-section-head {
    display: flex;
    align-items: baseline;
    gap: 0.9rem;
    border-bottom: 1px solid var(--rule-strong);
    padding-bottom: 0.6rem;
    margin-bottom: 1.4rem;
    position: relative;
}
.portal-section-head::before {
    /* a small terracotta tick that hangs off the top-left of every
       section head — like a binder clip. */
    content: "";
    position: absolute;
    top: -3px;
    left: 0;
    width: 8px;
    height: 2px;
    background: var(--terracotta);
}

.portal-section-mark {
    font-size: 0.7rem;
    font-weight: 700;
    color: var(--olive);
    letter-spacing: 0.18em;
    text-transform: uppercase;
    font-feature-settings: var(--mono-feats);
}

.portal-section-title {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--ink);
    letter-spacing: -0.01em;
    margin: 0;
}

.portal-section-meta {
    margin-left: 0.6rem;
    font-family: var(--font-mono);
    font-size: 0.68rem;
    color: var(--ink-faint);
    letter-spacing: 0.06em;
    text-transform: uppercase;
    opacity: 0.75;
    font-feature-settings: var(--mono-feats);
    padding: 2px 8px;
    border: 1px solid var(--rule-fine);
    background: var(--tint-warm-04);
}

.portal-grid {
    display: grid;
    /* 2-col on desktop. The portal card has a tag column + body column
       layout that reads best at ~480–540px per card, so 2-col is the
       natural width — Core (5) and Concepts (5) lay out as 2+2+1 with
       the orphan spanning the row, Guides (1) and Refs (2) fill cleanly. */
    grid-template-columns: repeat(2, 1fr);
    gap: 1px;
    background: var(--rule-strong);
    border: 1px solid var(--rule-strong);
}

/* A trailing half-row's last card spans the full row so no
   rule-strong cell shows through as an empty rectangle. */
.portal-grid > .portal-card:last-child:nth-child(odd) {
    grid-column: 1 / -1;
}

.portal-card {
    display: grid;
    grid-template-columns: auto 1fr;
    grid-template-rows: auto 1fr;
    gap: 4px 14px;
    padding: 1.3rem 1.25rem 1.2rem;
    background: var(--paper);
    text-decoration: none;
    color: var(--ink);
    transition: background var(--t-base) var(--ease), border-color var(--t-base) var(--ease), transform var(--t-base) var(--ease);
    border-left: 2px solid transparent;
    position: relative;
    border: 1px solid transparent;
}
.portal-card::after {
    /* a small terracotta arrow that appears on hover, top-right */
    content: "→";
    position: absolute;
    top: 0.95rem;
    right: 1.1rem;
    color: var(--terracotta);
    font-family: var(--font-mono);
    font-size: 0.85rem;
    opacity: 0;
    transform: translateX(-3px);
    transition: opacity var(--t-fast) var(--ease), transform var(--t-fast) var(--ease);
}
.portal-card:hover {
    background: var(--paper-2);
    border-left-color: var(--terracotta);
    border-color: var(--rule);
    transform: translateY(-2px);
}
.portal-card:hover::after { opacity: 1; transform: translateX(0); }
.portal-card:focus-visible { outline: 1px solid var(--terracotta); outline-offset: -1px; }

.card-tag {
    grid-column: 1;
    grid-row: 1 / span 2;
    align-self: start;
    font-family: var(--font-mono);
    font-size: 0.62rem;
    font-weight: 700;
    letter-spacing: 0.16em;
    color: var(--rule-mark);
    text-transform: uppercase;
    padding: 3px 7px 2px;
    border: 1px solid var(--rule-strong);
    background: var(--paper-inset);
    align-self: start;
    align-content: start;
    font-feature-settings: var(--mono-feats);
    /* the tag reads like a stamped paper-tab pinned to the card edge */
    line-height: 1.05;
    min-width: 36px;
    text-align: center;
    transition: border-color var(--t-fast) var(--ease), color var(--t-fast) var(--ease), background var(--t-fast) var(--ease);
}
.portal-card:hover .card-tag {
    color: var(--terracotta);
    border-color: var(--terracotta);
    background: var(--tint-terra-04);
}

.card-body {
    grid-column: 2;
    grid-row: 1 / span 2;
    display: flex;
    flex-direction: column;
    gap: 4px;
    min-width: 0;
}

.card-heading {
    font-family: var(--font-mono);
    font-size: 0.94rem;
    font-weight: 600;
    color: var(--ink);
    margin: 0 0 4px 0;
    letter-spacing: -0.01em;
    line-height: 1.3;
    transition: color var(--t-fast) var(--ease);
    padding-right: 1.1rem; /* room for the hover arrow */
}
.portal-card:hover .card-heading { color: var(--terracotta); }

.card-desc {
    font-family: var(--font-prose);
    font-size: 0.84rem;
    color: var(--ink-faint);
    line-height: 1.5;
    margin: 0;
}



/* =====================================================================
   9. PROSE — markdown body
   ===================================================================== */

.markdown-body { font-size: 1.02rem; }
.markdown-body > *:first-child { margin-top: 0; }

.markdown-body h1, .markdown-body h2, .markdown-body h3, .markdown-body h4 {
    font-family: var(--font-mono);
    color: var(--ink);
    font-weight: 600;
    line-height: 1.22;
    margin-top: 2.3rem;
    margin-bottom: 0.95rem;
    scroll-margin-top: 80px;
    position: relative;
}

.markdown-body h2::before,
.markdown-body h3::before,
.markdown-body h4::before {
    color: var(--olive);
    font-weight: 400;
    margin-right: 0.55rem;
    font-feature-settings: var(--mono-feats);
    display: inline-block;
}
.markdown-body h2::before { content: "\00a7"; font-size: 0.82em; opacity: 0.8; }
.markdown-body h3::before { content: "\00a7\00a7"; font-size: 0.72em; opacity: 0.65; }
.markdown-body h4::before { content: "§ 4"; font-size: 0.62em; opacity: 0.55; letter-spacing: 0.05em; }
.markdown-body h2 {
    font-size: 1.38rem;
    padding-bottom: 0.55rem;
    border-bottom: 1px solid var(--rule);
    letter-spacing: -0.014em;
    margin-top: 2.6rem;
}
.markdown-body h2::after {
    /* a small terracotta tick on the bottom rule of h2 — same printer's
       mark as the nav active state, the doc-header tick, and the
       portal-section head. Reused everywhere, so it feels native. */
    content: "";
    position: absolute;
    left: 0;
    bottom: -1px;
    width: 22px;
    height: 2px;
    background: var(--terracotta);
}
.markdown-body h3 {
    font-size: 1.1rem;
    color: var(--ink);
    letter-spacing: -0.006em;
}
.markdown-body h4 {
    font-size: 0.9rem;
    color: var(--ink-soft);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    padding-bottom: 0.3rem;
    border-bottom: 1px dashed var(--rule);
    font-feature-settings: var(--mono-feats);
}

.heading-anchor .anchor-link {
    opacity: 0;
    margin-left: 0.4rem;
    color: var(--ink-faint);
    text-decoration: none;
    font-weight: 400;
    transition: opacity var(--t-base) var(--ease), color var(--t-base) var(--ease);
    font-size: 0.78em;
    padding: 0 4px;
    border: 1px solid transparent;
    border-radius: 0;
}
.heading-anchor:hover .anchor-link { opacity: 1; }
.heading-anchor .anchor-link:hover {
    color: var(--terracotta);
    border-color: var(--terracotta);
}

.markdown-body p {
    margin: 0 0 1.1rem;
    color: var(--ink);
    line-height: 1.68;
    hyphens: auto;
    text-wrap: pretty;
}
.markdown-body ul, .markdown-body ol {
    padding-left: 1.5rem;
    margin: 0 0 1.25rem;
}
.markdown-body li {
    margin-bottom: 0.42rem;
    line-height: 1.62;
    padding-left: 0.15rem;
}
.markdown-body li::marker {
    color: var(--rule-mark);
    font-family: var(--font-mono);
    font-feature-settings: var(--mono-feats);
}
.markdown-body li > p { margin-bottom: 0.4rem; }

.markdown-body strong { color: var(--ink); font-weight: 600; }
.markdown-body em { font-style: italic; color: var(--ink); }

.inline-code {
    background: var(--code-paper);
    border: 1px solid var(--code-rule);
    padding: 1px 6px;
    font-size: 0.85em;
    color: var(--ink);
    border-radius: 0;
    font-family: var(--font-mono);
    font-feature-settings: var(--mono-feats);
    box-shadow: inset 0 -1px 0 var(--tint-warm-08);
    transition: background var(--t-fast) var(--ease), border-color var(--t-fast) var(--ease);
}
.markdown-body .inline-code:hover { background: var(--paper-inset); border-color: var(--rule-strong); }

.doc-link {
    color: var(--rule-mark);
    text-decoration: underline;
    text-underline-offset: 3px;
    text-decoration-thickness: 1px;
    text-decoration-color: var(--rule);
    transition: color var(--t-fast) var(--ease), text-decoration-color var(--t-fast) var(--ease);
}
.doc-link:hover { color: var(--terracotta); text-decoration-color: var(--terracotta); }

.doc-hr {
    border: none;
    border-top: 1px solid var(--rule);
    margin: 2.5rem auto;
    width: 30%;
    position: relative;
}
.doc-hr::before, .doc-hr::after {
    content: "✕";
    position: absolute;
    top: -0.6em;
    color: var(--ink-faint);
    font-size: 0.7em;
    font-family: var(--font-mono);
    background: var(--paper);
    padding: 0 0.4rem;
}
.doc-hr::before { left: 0; }
.doc-hr::after { right: 0; }

blockquote {
    border-left: 2px solid var(--rule-strong);
    padding: 0.6rem 1rem 0.4rem 1.1rem;
    margin: 1.5rem 0;
    color: var(--ink-soft);
    font-style: italic;
    font-family: var(--font-prose);
    background: var(--paper-2);
    position: relative;
    font-size: 1rem;
    line-height: 1.6;
}
blockquote::before {
    /* a single, oversized § glyph anchoring the left margin of every
       pull-quote — keeps the blockquote in the same editorial family
       as the heading §2 / §3 prefixes. */
    content: "§";
    position: absolute;
    top: 0.4rem;
    left: -0.55rem;
    width: 1rem;
    height: 1rem;
    background: var(--paper);
    color: var(--olive);
    font-family: var(--font-mono);
    font-size: 0.95rem;
    font-weight: 600;
    text-align: center;
    line-height: 1rem;
    font-style: normal;
}
blockquote p:last-child { margin-bottom: 0; }

/* Code blocks */
.code-wrapper {
    background: var(--code-paper);
    border: 1px solid var(--code-rule);
    border-radius: 0;
    margin: 1.5rem 0;
    overflow: hidden;
    position: relative;
    box-shadow: inset 0 0 0 1px var(--tint-warm-04);
}
.code-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 6px 14px 6px 12px;
    background: var(--paper-2);
    border-bottom: 1px solid var(--code-rule);
    font-size: 0.7rem;
    color: var(--ink-faint);
    letter-spacing: 0.12em;
    text-transform: uppercase;
    font-feature-settings: var(--mono-feats);
    position: relative;
}
.code-header::before {
    /* three small "traffic lights" on the left of the code header, drawn
       with pseudo-elements so we don't ship three span tags per block. */
    content: "";
    display: inline-block;
    width: 8px; height: 8px;
    background: var(--terracotta);
    margin-right: 0.55rem;
    box-shadow:
        12px 0 0 var(--olive),
        24px 0 0 var(--rule-strong);
    vertical-align: middle;
    opacity: 0.85;
}
.code-lang {
    font-weight: 600;
    color: var(--rule-mark);
    background: var(--tint-warm-08);
    border: 1px solid var(--code-rule);
    padding: 1px 7px;
    margin-left: 0.4rem;
    font-size: 0.66rem;
}
.copy-btn {
    background: transparent;
    border: 1px solid var(--code-rule);
    color: var(--ink-faint);
    padding: 2px 9px;
    border-radius: 0;
    cursor: pointer;
    font-size: 0.66rem;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    font-family: var(--font-mono);
    font-weight: 500;
    font-feature-settings: var(--mono-feats);
    transition: border-color var(--t-fast) var(--ease), color var(--t-fast) var(--ease), background var(--t-fast) var(--ease);
}
.copy-btn:hover, .expand-btn:hover { border-color: var(--rule-mark); color: var(--rule-mark); background: var(--tint-warm-04); }
.copy-btn.copied { border-color: var(--terracotta); color: var(--terracotta); background: var(--tint-terra-04); }

/* Long-block collapse: a faded cutoff with an expand affordance. */
.code-actions { display: inline-flex; align-items: center; gap: 6px; }
.expand-btn {
    background: transparent;
    border: 1px solid var(--code-rule);
    color: var(--ink-faint);
    padding: 2px 9px;
    border-radius: 0;
    cursor: pointer;
    font-size: 0.66rem;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    font-family: var(--font-mono);
    font-weight: 500;
    font-feature-settings: var(--mono-feats);
    transition: border-color var(--t-fast) var(--ease), color var(--t-fast) var(--ease), background var(--t-fast) var(--ease);
}
.code-wrapper.collapsed pre {
    max-height: 15.5em;
    overflow: hidden;
}
.code-wrapper.collapsed::after {
    content: "";
    position: absolute;
    left: 0;
    right: 0;
    bottom: 0;
    height: 4.5em;
    background: linear-gradient(to bottom, transparent, var(--code-paper));
    pointer-events: none;
}
.code-wrapper pre {
    margin: 0;
    padding: 0.95rem 1.1rem 1rem;
    overflow-x: auto;
    font-size: 0.82rem;
    line-height: 1.6;
    background: var(--code-paper);
}
.code-wrapper pre code { font-family: var(--font-mono); }
.code-wrapper pre code .line {
    display: inline-block;
    width: 100%;
}

/* KaTeX display blocks */
.math-block {
    overflow-x: auto;
    margin: 1.5rem 0;
    padding: 1.2rem 1rem 1.1rem;
    background: var(--paper-2);
    border: 1px solid var(--rule);
    border-left: 2px solid var(--olive);
    border-radius: 0;
    text-align: center;
    font-family: var(--font-prose);
    position: relative;
}
.math-block::before {
    /* a small olive tick on the right of every math block — a marginal
       signpost, in the same family as the § on the blockquote. */
    content: "ƒ";
    position: absolute;
    top: 0.3rem;
    right: 0.5rem;
    color: var(--olive);
    font-family: var(--font-mono);
    font-size: 0.7rem;
    opacity: 0.6;
    font-style: italic;
}
.math-inline { font-size: 1.02em; }

/* Tables */
.table-container {
    overflow-x: auto;
    margin: 1.5rem 0;
    border: 1px solid var(--rule);
    border-radius: 0;
    background: var(--paper);
}
.doc-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.86rem;
    font-family: var(--font-mono);
    text-align: left;
    background: var(--paper);
    font-feature-settings: var(--mono-feats);
}
.doc-table thead { border-bottom: 2px solid var(--rule-strong); }
.doc-table th {
    background: var(--paper-2);
    padding: 10px 14px;
    font-weight: 600;
    font-size: 0.7rem;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    border-bottom: 1px solid var(--rule);
    color: var(--ink-soft);
    position: relative;
}
.doc-table th::after {
    /* a small terracotta tick below the active/hovered column */
    content: "";
    position: absolute;
    left: 14px;
    right: 14px;
    bottom: -1px;
    height: 1px;
    background: var(--terracotta);
    opacity: 0;
    transition: opacity var(--t-fast) var(--ease);
}
.doc-table th:hover::after { opacity: 0.7; }
.doc-table td {
    padding: 9px 14px;
    border-bottom: 1px solid var(--rule-fine);
    color: var(--ink);
    transition: background var(--t-fast) var(--ease);
}
.doc-table tbody tr:last-child td { border-bottom: none; }
.doc-table tbody tr {
    position: relative;
    transition: background var(--t-fast) var(--ease);
}
.doc-table tbody tr:hover td { background: var(--tint-warm-04); }
.doc-table tbody tr:hover td:first-child {
    box-shadow: inset 2px 0 0 var(--terracotta);
}

/* Callouts */
.callout {
    padding: 0.95rem 1.2rem 0.95rem 1.3rem;
    border-left: 3px solid;
    border-top: 1px solid var(--rule-fine);
    border-right: 1px solid var(--rule-fine);
    border-bottom: 1px solid var(--rule-fine);
    border-radius: 0;
    margin: 1.6rem 0;
    background: var(--paper-2);
    position: relative;
    box-shadow: inset 0 1px 0 rgba(216,204,180,0.02);
}
.callout-note { background: var(--callout-note-bg); border-color: var(--callout-note-rule); }
.callout-tip  { background: var(--callout-tip-bg);  border-color: var(--callout-tip-rule); }
.callout-warn, .callout-warning { background: var(--callout-warn-bg); border-color: var(--callout-warn-rule); }
.callout-header {
    display: flex;
    align-items: center;
    gap: 0.55rem;
    font-size: 0.68rem;
    font-weight: 600;
    letter-spacing: 0.16em;
    text-transform: uppercase;
    margin-bottom: 0.55rem;
    color: var(--ink);
    font-feature-settings: var(--mono-feats);
    padding-bottom: 0.4rem;
    border-bottom: 1px dashed var(--rule);
}
.callout-header::before {
    /* the "stamp" — a small ▸ glyph that visually anchors the header
       and matches the § signpost in the blockquote. */
    content: "▸";
    color: var(--callout-note-rule);
    font-size: 0.95em;
    font-weight: 600;
}
.callout-tip .callout-header::before { color: var(--callout-tip-rule); }
.callout-warn .callout-header::before,
.callout-warning .callout-header::before { color: var(--callout-warn-rule); }
.callout-icon { display: none; }
.callout-body {
    font-family: var(--font-prose);
    color: var(--ink-soft);
    line-height: 1.6;
    font-size: 0.98rem;
}
.callout-body strong { color: var(--ink); }
.callout-body p:last-child { margin-bottom: 0; }
.callout-body p:first-child { margin-top: 0; }



/* =====================================================================
   10. FOOTER NAV
   ===================================================================== */

.doc-footer-nav {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1px;
    background: var(--rule-strong);
    border: 1px solid var(--rule-strong);
    margin-top: 4rem;
    position: relative;
}
.doc-footer-nav::before {
    content: "§ END OF NOTE";
    position: absolute;
    top: -0.7rem;
    left: 0;
    background: var(--paper);
    padding: 0 0.55rem;
    color: var(--olive);
    font-family: var(--font-mono);
    font-size: 0.62rem;
    letter-spacing: 0.18em;
    text-transform: uppercase;
    font-weight: 500;
    font-feature-settings: var(--mono-feats);
}

.nav-card {
    display: flex;
    flex-direction: column;
    gap: 6px;
    padding: 1.05rem 1.2rem;
    background: var(--paper);
    text-decoration: none;
    color: var(--ink);
    transition: background var(--t-fast) var(--ease);
    position: relative;
    border-left: 2px solid transparent;
    border-right: 2px solid transparent;
}
.nav-card:hover { background: var(--paper-2); border-color: var(--rule-strong); }
.nav-card:focus-visible { outline: 1px solid var(--terracotta); outline-offset: -1px; }
.nav-card.next-card { text-align: right; align-items: flex-end; }

.card-label {
    font-size: 0.66rem;
    color: var(--ink-faint);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.16em;
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
    font-feature-settings: var(--mono-feats);
}
.prev-card .card-label::before { content: "←"; color: var(--terracotta); font-size: 0.9em; }
.next-card .card-label::after { content: "→"; color: var(--terracotta); font-size: 0.9em; }
.card-title {
    font-size: 0.92rem;
    color: var(--ink);
    font-weight: 600;
    letter-spacing: -0.003em;
    transition: color var(--t-fast) var(--ease);
}
.nav-card:hover .card-title { color: var(--terracotta); }

/* =====================================================================
   10b. GPT-OSS-LITE TELEMETRY RIBBON & MECHANISM EXPLORERS
   ===================================================================== */

.hymo-telemetry-ribbon {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1px;
    background: var(--rule-strong);
    border: 1px solid var(--rule-strong);
    margin: 1.2rem 0 1.6rem;
    border-radius: 2px;
}

.telemetry-card {
    background: var(--paper-2);
    padding: 0.85rem 1rem 0.95rem;
    display: flex;
    flex-direction: column;
    gap: 4px;
    position: relative;
    overflow: hidden;
}

.telemetry-card::before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: var(--rule);
}

.telemetry-card.terra::before { background: var(--terracotta); }
.telemetry-card.olive::before { background: var(--olive); }
.telemetry-card.gold::before { background: var(--rule-mark); }
.telemetry-card.ink::before { background: var(--ink-soft); }

/* subtle "instrument-readout" frame: a fine olive tick in the upper-right
   of every telemetry card so the row reads as four coordinated gauges
   rather than four loose tiles. */
.telemetry-card::after {
    content: "";
    position: absolute;
    top: 6px;
    right: 7px;
    width: 4px;
    height: 4px;
    background: var(--ink-faint);
    opacity: 0.4;
    border-radius: 0;
}
.telemetry-card.terra::after  { background: var(--terracotta); opacity: 0.7; }
.telemetry-card.olive::after  { background: var(--olive); opacity: 0.7; }
.telemetry-card.gold::after   { background: var(--rule-mark); opacity: 0.7; }

.tc-badge {
    font-size: 0.60rem;
    font-weight: 700;
    letter-spacing: 0.14em;
    text-transform: uppercase;
    color: var(--ink-faint);
    display: flex;
    align-items: center;
    gap: 5px;
    font-feature-settings: var(--mono-feats);
}

.tc-badge-dot {
    width: 5px;
    height: 5px;
    border-radius: 50%;
    background: var(--ink-faint);
}

.telemetry-card.terra .tc-badge-dot { background: var(--terracotta); box-shadow: 0 0 6px var(--terracotta-glow); }
.telemetry-card.olive .tc-badge-dot { background: var(--olive); box-shadow: 0 0 6px var(--olive-tint); }
.telemetry-card.gold .tc-badge-dot { background: var(--rule-mark); box-shadow: 0 0 6px rgba(201, 163, 92, 0.4); }
.telemetry-card.ink .tc-badge-dot { background: var(--ink-soft); }

.tc-val {
    font-size: 1.18rem;
    font-weight: 700;
    color: var(--ink);
    letter-spacing: -0.02em;
    display: flex;
    align-items: baseline;
    gap: 4px;
    font-feature-settings: var(--mono-feats);
}

.tc-val .unit {
    font-size: 0.72rem;
    font-weight: 500;
    color: var(--ink-soft);
}

.tc-desc {
    font-size: 0.66rem;
    color: var(--ink-faint);
    line-height: 1.35;
}

/* Mechanism Exploder Section */
.mechanism-section {
    margin: 2.6rem 0 1rem;
}

.mechanism-section-head {
    display: flex;
    align-items: center;
    justify-content: space-between;
    border-bottom: 1px solid var(--rule-strong);
    padding-bottom: 0.55rem;
    margin-bottom: 1.2rem;
    position: relative;
}
.mechanism-section-head::before {
    content: "";
    position: absolute;
    top: -3px;
    left: 0;
    width: 8px;
    height: 2px;
    background: var(--terracotta);
}

.mechanism-section-title {
    font-size: 0.72rem;
    font-weight: 700;
    color: var(--olive);
    letter-spacing: 0.16em;
    text-transform: uppercase;
    font-feature-settings: var(--mono-feats);
}

.mechanism-grid {
    display: grid;
    /* 2×2 on desktop — each card gets ~510px which is enough to fit the
       GDN formula, the MoE 4×4 mini-grid, the MLA context-slider stats
       and the MTP speculative tree without their content breaking into
       three-line wraps. */
    grid-template-columns: repeat(2, 1fr);
    gap: 14px;
    margin-bottom: 1.5rem;
    position: relative;
}

.mechanism-card {
    background: var(--paper-2);
    border: 1px solid var(--rule-strong);
    border-radius: 0;
    display: flex;
    flex-direction: column;
    overflow: hidden;
    position: relative;
    box-shadow: 0 1px 0 var(--paper-inset) inset, 0 2px 0 rgba(0,0,0,0.35);
    transition: border-color var(--t-fast) var(--ease), transform var(--t-fast) var(--ease);
}
.mechanism-card:hover { border-color: var(--olive); transform: translateY(-1px); }
.mechanism-card.card-gdn:hover { border-color: var(--terracotta); }
.mechanism-card.card-moe:hover { border-color: var(--rule-mark); }

.mechanism-card-head {
    padding: 0.7rem 0.85rem;
    background: var(--paper-3);
    border-bottom: 1px solid var(--rule);
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 8px;
}

.mch-tag {
    font-size: 0.62rem;
    font-weight: 700;
    color: var(--terracotta);
    letter-spacing: 0.12em;
    text-transform: uppercase;
    font-feature-settings: var(--mono-feats);
}
.mechanism-card.card-gdn .mch-tag { color: var(--terracotta); }
.mechanism-card.card-mla .mch-tag { color: var(--olive); }
.mechanism-card.card-moe .mch-tag { color: var(--rule-mark); }
.mechanism-card.card-mtp .mch-tag { color: var(--terracotta); }

.mch-title {
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--ink);
}

.mechanism-card-body {
    padding: 0.85rem;
    display: flex;
    flex-direction: column;
    gap: 10px;
    flex: 1;
}

.mch-explainer {
    font-size: 0.78rem;
    color: var(--ink-soft);
    line-height: 1.5;
    margin: 0;
}

.mch-control-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    font-size: 0.68rem;
    color: var(--ink-faint);
}

.mch-slider {
    width: 100%;
    margin: 4px 0 8px;
    accent-color: var(--terracotta);
    cursor: pointer;
}

.mch-stat-box {
    background: var(--paper-2);
    border: 1px solid var(--rule);
    padding: 0.55rem 0.7rem;
    display: flex;
    flex-direction: column;
    gap: 3px;
    font-family: var(--font-mono);
}

.msb-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.68rem;
    color: var(--ink-soft);
    font-feature-settings: var(--mono-feats);
}

.msb-row.highlight {
    color: var(--terracotta);
    font-weight: 700;
    border-top: 1px dashed var(--rule);
    padding-top: 3px;
    margin-top: 2px;
}

.mch-action-btn {
    background: var(--paper-3);
    border: 1px solid var(--rule);
    color: var(--ink);
    font-family: var(--font-mono);
    font-size: 0.66rem;
    font-weight: 600;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    padding: 0.4rem 0.75rem;
    cursor: pointer;
    transition: all var(--t-fast) var(--ease);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    width: 100%;
    margin-top: auto;
    border-radius: 2px;
}

.mch-action-btn:hover {
    background: var(--tint-terra-04);
    border-color: var(--terracotta);
    color: var(--terracotta);
}
.mechanism-card.card-mla .mch-action-btn:hover {
    border-color: var(--olive);
    color: var(--olive);
    background: var(--olive-tint);
}
.mechanism-card.card-moe .mch-action-btn:hover {
    border-color: var(--rule-mark);
    color: var(--rule-mark);
    background: var(--callout-note-bg);
}

/* Chunkwise Pipeline Visualizer */
.chunk-pipeline-box {
    background: var(--paper-inset);
    border: 1px solid var(--rule);
    padding: 0.6rem 0.75rem;
    font-size: 0.68rem;
    line-height: 1.5;
    font-family: var(--font-mono);
    border-radius: 2px;
}

.chunk-stage {
    display: flex;
    align-items: center;
    gap: 10px;
    margin: 4px 0;
    color: var(--ink-soft);
    transition: opacity 0.3s ease;
    padding: 4px 0;
}
.chunk-stage + .chunk-stage {
    border-top: 1px solid var(--rule-fine);
}

.chunk-badge {
    padding: 3px 7px;
    border-radius: 2px;
    font-size: 0.6rem;
    font-weight: 700;
    font-feature-settings: var(--mono-feats);
    flex-shrink: 0;
    min-width: 56px;
    text-align: center;
    letter-spacing: 0.08em;
}

.chunk-badge.scan {
    background: var(--tint-warm-08);
    color: var(--ink);
    border: 1px solid var(--rule);
}

.chunk-badge.chunk {
    background: var(--tint-terra-14);
    color: var(--terracotta);
    border: 1px solid var(--terracotta);
}

.chunk-badge.state {
    background: var(--olive-tint);
    color: var(--olive);
    border: 1px solid var(--olive);
}

/* MoE Mini Grid (4 columns for 16 routed experts + 1 shared) */
.moe-mini-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 3px;
    margin: 4px 0;
}

.moe-mini-cell {
    background: var(--paper-2);
    border: 1px solid var(--rule);
    padding: 3px 2px;
    text-align: center;
    font-size: 0.60rem;
    color: var(--ink-faint);
    transition: all 0.15s ease;
    font-family: var(--font-mono);
}

.moe-mini-cell.active {
    background: var(--tint-terra-14);
    border-color: var(--terracotta);
    color: var(--terracotta);
    font-weight: 700;
    box-shadow: 0 0 6px var(--terracotta-glow);
}

.moe-mini-cell.shared {
    background: rgba(201, 163, 92, 0.15);
    border-color: var(--rule-mark);
    color: var(--rule-mark);
    font-weight: 700;
    grid-column: 1 / -1;
    margin-top: 2px;
}

/* MTP Speculative Tree Visualizer */
.mtp-tree-box {
    background: var(--paper-2);
    border: 1px solid var(--rule);
    padding: 0.55rem;
    font-size: 0.66rem;
    line-height: 1.4;
    font-family: var(--font-mono);
}

.mtp-branch {
    display: flex;
    align-items: center;
    gap: 6px;
    margin: 3px 0;
}

.mtp-badge {
    padding: 1px 5px;
    border-radius: 2px;
    font-size: 0.58rem;
    font-weight: 700;
    font-feature-settings: var(--mono-feats);
}

.mtp-badge.acc {
    background: var(--olive-tint);
    color: var(--olive);
    border: 1px solid var(--olive);
}

.mtp-badge.draft {
    background: var(--tint-warm-08);
    color: var(--ink);
    border: 1px solid var(--rule);
}

@media (max-width: 1280px) {
    /* mechanism-grid is already 2-col on desktop; collapse to 1-col under 720 */
}

@media (max-width: 1024px) {
    .hymo-telemetry-ribbon { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
    .hymo-telemetry-ribbon { grid-template-columns: 1fr; }
    .mechanism-grid { grid-template-columns: 1fr; }
}



/* =====================================================================
   11. RESPONSIVE
   ===================================================================== */

@media (max-width: 1180px) {
    .app-layout,
    .index-portal .app-layout,
    .app-layout:not(:has(.toc-sidebar)) {
        grid-template-columns: 232px minmax(0, 1fr);
    }
    .toc-sidebar { display: none; }
}

@media (max-width: 880px) {
    .app-layout,
    .index-portal .app-layout,
    .app-layout:not(:has(.toc-sidebar)) {
        grid-template-columns: 1fr;
    }
    .sidebar {
        display: none;
        position: fixed;
        left: 0; top: 50px;
        width: 280px;
        z-index: 60;
        background: var(--paper-2);
        border-right: 1px solid var(--rule);
        height: calc(100vh - 50px);
        box-shadow: 4px 0 14px rgba(0, 0, 0, 0.5);
    }
    .sidebar.open { display: block; }
    .mobile-toggle { display: inline-block; }

    .main-content,
    .index-portal .main-content {
        padding: 1.6rem 1.25rem 3rem;
        width: 100%;
        max-width: 100%;
    }
    .main-content::before { left: 14px; }
    .hero-banner { padding: 1.8rem 1.3rem; }
    .hero-title { font-size: 1.95rem; }
    .fig-canvas-wrap { height: 280px; }
    .pass-canvas-wrap { height: 200px; }
    .fig-dim, .pass-dim { display: none; }
    .legend-hint { display: none; }
    .doc-title { font-size: 1.65rem; }
    .hero-coords { font-size: 0.64rem; }
    .spec-grid { grid-template-columns: repeat(2, 1fr); }
    .portal-grid { grid-template-columns: 1fr; }
    .portal-card:last-child:nth-child(odd) {
        flex-direction: column;
        gap: 6px;
    }
    .spec-cell:nth-child(4n) { border-right: 1px solid var(--rule); }
    .spec-cell:nth-child(2n) { border-right: none; }
    .spec-cell:nth-last-child(-n+4) { border-bottom: 1px solid var(--rule); }
    .spec-cell:nth-last-child(-n+2) { border-bottom: none; }
    .doc-meta .meta-item { border-right: none; padding-right: 0; }
    .portal-card::after { display: none; }
    .portal-card:hover .card-heading { color: var(--ink); }
    .hymo-telemetry-ribbon { grid-template-columns: repeat(2, 1fr); }
    .mechanism-grid { grid-template-columns: 1fr; }
}
@media (max-width: 560px) {
    .hero-figure-header {
        flex-direction: column;
        align-items: stretch;
        gap: 0.5rem;
    }
    .fig-badge {
        justify-content: flex-start;
    }
    .fig-controls {
        display: flex;
        width: 100%;
    }
    .fig-controls .fig-btn:not(.fig-btn-icon) {
        flex: 1;
        text-align: center;
        padding: 0.25rem 0.2rem;
        font-size: 0.52rem;
    }
    .hud-corner, .pass-hud-chip {
        display: none;
    }
    .hero-figure-footer, .pass-widget-footer {
        flex-direction: column;
        align-items: flex-start;
        gap: 0.4rem;
    }
    .pass-widget-header {
        flex-direction: column;
        align-items: stretch;
        gap: 0.5rem;
    }
    .pass-badge {
        justify-content: flex-start;
    }
    .pass-controls {
        display: flex;
        width: 100%;
    }
    .pass-controls .pass-btn:not(.pass-btn-icon) {
        flex: 1;
        text-align: center;
        padding: 0.25rem 0.2rem;
        font-size: 0.52rem;
    }
    .hymo-telemetry-ribbon { grid-template-columns: 1fr 1fr; }
    .tc-val { font-size: 1rem; }
    .mechanism-grid { grid-template-columns: 1fr; }
}

@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        animation: none !important;
        transition: none !important;
        scroll-behavior: auto !important;
    }
}

/* ---------- GPT-OSS-Lite widget contracts ----------
 * These back the id="widget-..." containers that test_build_docs_html.py asserts.
 * Hero figure hooks (hero-figure-decode, sr-only) ride the existing hero-figure
 * rules; only the ASCII layer-stack + moe/sink doc widgets need rules here. */

/* Layer-stack ASCII widget (sibling of FIG. A1) */
.widget-layer-stack {
    margin: 1.5rem 0 2rem;
    border: 1px solid var(--rule);
    border-left: 3px solid var(--rule-mark);
    background: var(--paper-2);
    padding: 1rem 1.2rem 1.1rem;
    font-family: var(--font-mono);
    border-radius: 2px;
}
.widget-layer-stack-header {
    display: flex;
    flex-wrap: wrap;
    gap: 0.6rem;
    align-items: baseline;
    font-size: 0.62rem;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--ink-faint);
    margin-bottom: 0.7rem;
    padding-bottom: 0.55rem;
    border-bottom: 1px dashed var(--rule);
}
.widget-layer-stack-header .ls-tag { color: var(--terracotta); font-weight: 700; }
.widget-layer-stack-header .ls-title { color: var(--ink); font-weight: 600; }
.widget-layer-stack-header .ls-meta { color: var(--ink-soft); font-size: 0.56rem; }
pre.ascii-stack {
    margin: 0;
    padding: 0.85rem 1rem;
    background: var(--paper-inset);
    border: 1px solid var(--rule);
    border-radius: 2px;
    color: var(--ink-soft);
    font-family: var(--font-mono);
    font-size: 0.72rem;
    line-height: 1.55;
    overflow-x: auto;
    white-space: pre;
}
pre.ascii-stack code { font: inherit; color: inherit; background: transparent; }

/* Screen-reader-only h1 (replaces clipped visual h1 hero-title) */
.hero-title.sr-only {
    position: absolute !important;
    width: 1px; height: 1px;
    padding: 0; margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

/* MoE routing playground (lives on docs/concepts/moe.html) */
.moe-playground {
    margin: 1.5rem 0 2rem;
    border: 1px solid var(--rule);
    border-left: 3px solid var(--terracotta);
    background: var(--paper-2);
    padding: 1rem 1.2rem 1.1rem;
    border-radius: 2px;
}
.mp-head {
    display: flex;
    flex-wrap: wrap;
    gap: 0.6rem;
    align-items: baseline;
    font-family: var(--font-mono);
    font-size: 0.62rem;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    margin-bottom: 0.7rem;
    padding-bottom: 0.55rem;
    border-bottom: 1px dashed var(--rule);
}
.mp-tag { color: var(--terracotta); font-weight: 700; }
.mp-title { color: var(--ink); font-weight: 600; }
.mp-meta { color: var(--ink-soft); font-size: 0.56rem; }
.mp-canvas-wrap {
    position: relative;
    width: 100%;
    height: 240px;
    background: radial-gradient(ellipse at center, #17130f 0%, #0e0c0a 70%, #080706 100%);
    overflow: hidden;
    border-radius: 2px;
}
.mp-canvas { display: block; width: 100%; height: 100%; }
.mp-overlay-hud { position: absolute; inset: 0; pointer-events: none; }
.mp-hud-chip {
    position: absolute;
    padding: 0.4rem 0.6rem;
    background: rgba(18, 16, 13, 0.90);
    border: 1px solid var(--rule-strong);
    backdrop-filter: blur(4px);
    -webkit-backdrop-filter: blur(4px);
    font-family: var(--font-mono);
    line-height: 1.35;
}
.mp-hud-chip.top-left { top: 8px; left: 8px; }
.mp-hud-chip.top-right { top: 8px; right: 8px; text-align: right; }
.mph-lbl { display: block; font-size: 0.55rem; letter-spacing: 0.1em; color: var(--ink-faint); text-transform: uppercase; }
.mph-val { display: block; font-size: 0.72rem; color: var(--ink); font-weight: 600; }
.mp-footer {
    margin-top: 0.6rem;
    font-family: var(--font-mono);
    font-size: 0.58rem;
    color: var(--ink-faint);
    letter-spacing: 0.08em;
    text-align: center;
}

/* Sink-bias toggle (lives on docs/concepts/attention-sinks.html) */
.sink-toggle {
    margin: 1.5rem 0 2rem;
    border: 1px solid var(--rule);
    border-left: 3px solid var(--olive);
    background: var(--paper-2);
    padding: 1rem 1.2rem 1.1rem;
    border-radius: 2px;
}
.st-head {
    display: flex;
    flex-wrap: wrap;
    gap: 0.6rem;
    align-items: baseline;
    font-family: var(--font-mono);
    font-size: 0.62rem;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    margin-bottom: 0.7rem;
    padding-bottom: 0.55rem;
    border-bottom: 1px dashed var(--rule);
}
.st-tag { color: var(--olive); font-weight: 700; }
.st-title { color: var(--ink); font-weight: 600; }
.st-meta { color: var(--ink-soft); font-size: 0.56rem; }
.st-canvas-wrap {
    position: relative;
    width: 100%;
    height: 220px;
    background: radial-gradient(ellipse at center, #17130f 0%, #0e0c0a 70%, #080706 100%);
    overflow: hidden;
    border-radius: 2px;
}
.st-canvas { display: block; width: 100%; height: 100%; }
.st-overlay-hud { position: absolute; inset: 0; pointer-events: none; }
.st-hud-chip {
    position: absolute;
    padding: 0.4rem 0.6rem;
    background: rgba(18, 16, 13, 0.90);
    border: 1px solid var(--rule-strong);
    backdrop-filter: blur(4px);
    -webkit-backdrop-filter: blur(4px);
    font-family: var(--font-mono);
    line-height: 1.35;
}
.st-hud-chip.top-left { top: 8px; left: 8px; }
.st-hud-chip.top-right { top: 8px; right: 8px; text-align: right; }
.sth-lbl { display: block; font-size: 0.55rem; letter-spacing: 0.1em; color: var(--ink-faint); text-transform: uppercase; }
.sth-val { display: block; font-size: 0.72rem; color: var(--ink); font-weight: 600; }
.st-footer {
    margin-top: 0.6rem;
    font-family: var(--font-mono);
    font-size: 0.58rem;
    color: var(--ink-faint);
    letter-spacing: 0.08em;
    text-align: center;
}