/* ============================================================================
   Functional Prescience™
   Stylesheet v1.0
   ----------------------------------------------------------------------------
   Palette: black / antique gold / ivory + restrained stress accents
   Type:    Cinzel (display) · EB Garamond (headings) · Inter (body) ·
            IBM Plex Mono (technical)
   Aesthetic register: austere doctrine. Void-dominant.
============================================================================ */
/* ---------------------------------------------------------------------------
   1. RESET / BASE
---------------------------------------------------------------------------- */
*,
*::before,
*::after {
    box-sizing: border-box;
}

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

body,
h1,
h2,
h3,
h4,
h5,
h6,
p,
ul,
ol,
dl,
figure,
blockquote {
    margin: 0;
    padding: 0;
}

ul,
ol {
    list-style: none;
}

img,
svg,
picture {
    display: block;
    max-width: 100%;
    height: auto;
}

a {
    color: inherit;
    text-decoration: none;
}

button,
input,
select,
textarea {
    font: inherit;
    color: inherit;
}

button {
    background: none;
    border: 0;
    padding: 0;
    cursor: pointer;
}

table {
    border-collapse: collapse;
    border-spacing: 0;
    width: 100%;
}

::selection {
    background: rgba(166, 136, 76, 0.35);
    color: #E2D6BC;
}

/* ---------------------------------------------------------------------------
   2. CUSTOM PROPERTIES — palette, type, spacing, layout
---------------------------------------------------------------------------- */
:root {
    /* Palette — primary darks */
    --c-black-absolute: #030302;
    --c-black-void: #070604;
    --c-black-carbon: #0B0906;
    --c-graphite: #11100C;

    /* Palette — gold / brass */
    --c-bronze-shadow: #0B0703;
    --c-bronze-deep: #3A2A12;
    --c-brass-muted: #7F6A3A;
    --c-gold-antique: #A6884C;
    --c-gold-highlight: #D9B86A;

    /* Palette — ivory / parchment */
    --c-parchment: #C8B89A;
    --c-ivory-soft: #E2D6BC;
    --c-ivory-muted: #B8AA8A;

    /* Palette — optional stress */
    --c-ember: #7A3A1F;
    --c-rust: #5A2B18;
    --c-ash: #6D675B;

    /* Semantic */
    --c-bg: var(--c-black-void);
    --c-bg-deep: var(--c-black-absolute);
    --c-bg-panel: var(--c-graphite);
    --c-text: var(--c-ivory-soft);
    --c-text-muted: var(--c-ivory-muted);
    --c-text-soft: var(--c-parchment);
    --c-rule: var(--c-gold-antique);
    --c-rule-faint: rgba(166, 136, 76, 0.25);
    --c-rule-soft: rgba(166, 136, 76, 0.45);
    --c-accent: var(--c-gold-antique);
    --c-accent-bright: var(--c-gold-highlight);

    /* Typography */
    --ff-display: "Cinzel", "Trajan Pro", "Times New Roman", serif;
    --ff-heading: "EB Garamond", "Cormorant Garamond", Georgia, serif;
    --ff-body: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI",
                Roboto, "Helvetica Neue", Arial, sans-serif;
    --ff-mono: "IBM Plex Mono", "SF Mono", Menlo, Consolas, monospace;
    --fs-eyebrow: 0.75rem;
    --fs-body: 1.0625rem;

    /* 17px */
    --fs-body-lg: 1.1875rem;

    /* 19px */
    --fs-lede: 1.375rem;

    /* 22px */
    --fs-lede-lg: 1.625rem;

    /* 26px */
    --fs-h3: 1.375rem;
    --fs-h2: 1.875rem;
    --fs-h1: 2.5rem;
    --fs-hero: 3.5rem;
    --fs-hero-lg: 4.5rem;
    --lh-tight: 1.15;
    --lh-snug: 1.3;
    --lh-base: 1.6;
    --lh-prose: 1.7;

    /* Spacing scale (modular) */
    --s-0: 0.25rem;
    --s-1: 0.5rem;
    --s-2: 0.75rem;
    --s-3: 1rem;
    --s-4: 1.5rem;
    --s-5: 2rem;
    --s-6: 3rem;
    --s-7: 4rem;
    --s-8: 6rem;
    --s-9: 8rem;
    --s-10: 12rem;

    /* Layout */
    --w-container: 72rem;

    /* 1152px */
    --w-container-narrow: 52rem;

    /* 832px — prose column */
    --w-container-wide: 84rem;

    /* 1344px — wide hero, grids */
    --w-content: 38rem;

    /* 608px — reading measure */
    /* Borders */
    --bd-rule: 1px solid var(--c-rule-faint);
    --bd-rule-strong: 1px solid var(--c-rule-soft);
    --bd-gold: 1px solid var(--c-gold-antique);

    /* Transitions */
    --t-fast: 120ms ease-out;
    --t-base: 200ms ease-out;
    --t-slow: 320ms ease-out;
}

/* ---------------------------------------------------------------------------
   3. BODY / GLOBAL SUBSTRATE
---------------------------------------------------------------------------- */
html,
body {
    background: var(--c-bg);
}

body {
    font-family: var(--ff-body);
    font-size: var(--fs-body);
    line-height: var(--lh-prose);
    color: var(--c-text);
    font-weight: 400;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    text-rendering: optimizeLegibility;
    min-height: 100vh;
    overflow-x: hidden;
    background-color: var(--c-black-void);
    background-image: url("../img/void-field-sparse.png");
    background-size: cover;
    background-position: center top;
    background-attachment: fixed;
    background-repeat: no-repeat;
}

/* Optional secondary substrate layer applied per page via body class */
body.bg-distributed {
    background-image: url("../img/void-field-distributed.png");
}

body.bg-streak {
    background-image: url("../img/void-field-streak.png");
}

body.bg-sparse {
    background-image: url("../img/void-field-sparse.png");
}

/* ---------------------------------------------------------------------------
   4. TYPOGRAPHY HIERARCHY
---------------------------------------------------------------------------- */
h1,
h2,
h3,
h4,
h5,
h6 {
    font-family: var(--ff-heading);
    font-weight: 500;
    color: var(--c-ivory-soft);
    line-height: var(--lh-tight);
    letter-spacing: -0.005em;
}

h1 {
    font-family: var(--ff-display);
    font-size: var(--fs-h1);
    font-weight: 400;
    letter-spacing: 0.02em;
    color: var(--c-ivory-soft);
}

h2 {
    font-size: var(--fs-h2);
    font-weight: 500;
    margin-top: var(--s-7);
    margin-bottom: var(--s-4);
    color: var(--c-ivory-soft);
}

h3 {
    font-size: var(--fs-h3);
    font-weight: 500;
    margin-top: var(--s-5);
    margin-bottom: var(--s-3);
    color: var(--c-parchment);
}

p {
    margin: 0 0 var(--s-4);
    max-width: 46rem;
}

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

.eyebrow {
    display: inline-block;
    font-family: var(--ff-body);
    font-size: var(--fs-eyebrow);
    letter-spacing: 0.18em;
    text-transform: uppercase;
    color: var(--c-gold-antique);
    font-weight: 500;
    margin-bottom: var(--s-3);
}

.lede {
    font-family: var(--ff-heading);
    font-size: var(--fs-lede);
    line-height: var(--lh-snug);
    color: var(--c-parchment);
    font-weight: 400;
    font-style: italic;
    max-width: var(--w-content);
    margin-bottom: var(--s-4);
}

.lede-marketing {
    font-family: var(--ff-heading);
    line-height: 1.45;
    color: var(--c-ivory-soft);
    font-weight: 400;
    font-style: normal;
    max-width: 40rem;
    margin: var(--s-4) 0;
    font-size: 1.1rem;
}

.tagline {
    font-family: var(--ff-heading);
    font-size: var(--fs-body-lg);
    font-style: italic;
    color: var(--c-parchment);
}

.tm {
    font-family: var(--ff-body);
    font-size: 0.6em;
    font-weight: 500;
    vertical-align: super;
    letter-spacing: 0;
    margin-left: 0.05em;
    color: inherit;
}

strong,
b {
    color: var(--c-ivory-soft);
    font-weight: 600;
}

em,
i {
    font-style: italic;
}

code,
kbd,
samp,
.mono {
    font-family: var(--ff-mono);
    font-size: 0.9em;
    color: var(--c-parchment);
}

/* ---------------------------------------------------------------------------
   5. LAYOUT — containers, sections, grid
---------------------------------------------------------------------------- */
.container {
    width: 100%;
    max-width: var(--w-container);
    margin-left: auto;
    margin-right: auto;
    padding-left: var(--s-4);
    padding-right: var(--s-4);
}

.container-narrow {
    max-width: var(--w-container-narrow);
}

.container-wide {
    max-width: var(--w-container-wide);
}

section {
    padding-top: var(--s-7);
    padding-bottom: var(--s-7);
    position: relative;
}

section + section {
    padding-top: var(--s-5);
}

.section-divider {
    border-top: var(--bd-rule);
    margin: var(--s-7) auto;
    max-width: 4rem;
}

.section-block + .section-block {
    margin-top: var(--s-6);
    padding-top: var(--s-6);
    border-top: var(--bd-rule);
}

/* Two-column hero grid */
.hero-grid {
    display: grid;
    grid-template-columns: 1.4fr 1fr;
    gap: var(--s-7);
    align-items: center;
    padding-top: var(--s-7);
    padding-bottom: var(--s-7);
}

.hero-grid > div:first-child {
    min-width: 0;
}

.hero-cover {
    display: flex;
    justify-content: center;
    align-items: center;
}

.hero-cover img {
    max-width: 100%;
    max-height: 70vh;
    width: auto;
    height: auto;
    box-shadow: 0 30px 80px rgba(0, 0, 0, 0.8),
              0 10px 30px rgba(0, 0, 0, 0.6);
    border: 1px solid rgba(166, 136, 76, 0.15);
}

/* ---------------------------------------------------------------------------
   6. SITE HEADER / NAVIGATION
---------------------------------------------------------------------------- */
.site-header {
    position: sticky;
    top: 0;
    z-index: 100;
    background: rgba(3, 3, 2, 0.92);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid rgba(166, 136, 76, 0.18);
}

.site-header > .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--s-4);
    padding-top: var(--s-3);
    padding-bottom: var(--s-3);
    max-width: var(--w-container-wide);
}

.brand {
    font-family: var(--ff-display);
    font-size: 1.0625rem;
    font-weight: 400;
    letter-spacing: 0.04em;
    color: var(--c-ivory-soft);
    white-space: nowrap;
    transition: color var(--t-base);
    flex-shrink: 0;
}

.brand:hover {
    color: var(--c-gold-highlight);
}

.brand .tm {
    font-size: 0.55em;
    color: var(--c-gold-antique);
}

/* Desktop nav */
.nav {
    display: flex;
    align-items: center;
    gap: var(--s-3);
    flex-wrap: wrap;
    justify-content: flex-end;
    font-family: var(--ff-body);
    font-size: 0.8125rem;
    letter-spacing: 0.02em;
}

.nav a {
    color: var(--c-text-muted);
    padding: var(--s-1) var(--s-1);
    transition: color var(--t-base);
    white-space: nowrap;
    border-bottom: 1px solid transparent;
}

.nav a:hover,
.nav a:focus {
    color: var(--c-gold-highlight);
    border-bottom-color: var(--c-gold-antique);
    outline: none;
}

.nav a[aria-current="page"] {
    color: var(--c-ivory-soft);
    border-bottom-color: var(--c-gold-antique);
}

/* Mobile toggle */
.nav-toggle {
    display: none;
    font-family: var(--ff-body);
    font-size: 0.875rem;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--c-text-muted);
    padding: var(--s-1) var(--s-2);
    border: 1px solid var(--c-rule-faint);
    transition: color var(--t-base), border-color var(--t-base);
}

.nav-toggle:hover {
    color: var(--c-gold-highlight);
    border-color: var(--c-gold-antique);
}

.nav-toggle[aria-expanded="true"] {
    color: var(--c-gold-highlight);
    border-color: var(--c-gold-antique);
}

/* Mobile drawer */
.nav-group-label {
    display: none;
}

/* ---------------------------------------------------------------------------
   7. BUTTONS / CTAs — restrained, administrative
---------------------------------------------------------------------------- */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.875rem 1.5rem;
    font-family: var(--ff-body);
    font-size: 0.8125rem;
    font-weight: 500;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--c-ivory-soft);
    background: transparent;
    border: 1px solid var(--c-gold-antique);
    transition: background var(--t-base), color var(--t-base),
              border-color var(--t-base);
    cursor: pointer;
    text-decoration: none;
    white-space: nowrap;
}

.btn:hover,
.btn:focus {
    background: rgba(166, 136, 76, 0.12);
    border-color: var(--c-gold-highlight);
    color: var(--c-gold-highlight);
    outline: none;
}

.btn-primary {
    background: var(--c-gold-antique);
    color: var(--c-black-absolute);
    border-color: var(--c-gold-antique);
}

.btn-primary:hover,
.btn-primary:focus {
    background: var(--c-gold-highlight);
    border-color: var(--c-gold-highlight);
    color: var(--c-black-absolute);
}

.btn-ghost {
    background: transparent;
    border-color: var(--c-rule-faint);
    color: var(--c-text-muted);
}

.btn-ghost:hover,
.btn-ghost:focus {
    border-color: var(--c-gold-antique);
    color: var(--c-ivory-soft);
}

.hero-cta {
    display: flex;
    flex-wrap: wrap;
    gap: var(--s-2);
    margin-top: var(--s-5);
}

.cta-row {
    display: flex;
    flex-wrap: wrap;
    gap: var(--s-2);
    margin-top: var(--s-4);
}

/* ---------------------------------------------------------------------------
   8. GOLD-BORDER FRAMED BLOCK
---------------------------------------------------------------------------- */
.bordered-block {
    position: relative;
    padding: var(--s-6) var(--s-5);
    margin: var(--s-5) 0;
}

.bordered-block::before {
    content: "";
    position: absolute;
    inset: 0;
    pointer-events: none;
    border-top: 1px solid var(--c-gold-antique);
    border-bottom: 1px solid var(--c-gold-antique);
}

.bordered-block::after {
    content: "";
    position: absolute;
    inset: 0;
    pointer-events: none;
    border-left: 1px solid var(--c-gold-antique);
    border-right: 1px solid var(--c-gold-antique);

    /* Tick marks via box-shadow trickery handled inline in markup if needed */
}

/* ---------------------------------------------------------------------------
   9. CARDS — domain cards, case cards, generic
---------------------------------------------------------------------------- */
.card-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(15rem, 1fr));
    gap: var(--s-3);
    margin-top: var(--s-5);
}

.card {
    display: block;
    padding: var(--s-4) var(--s-4);
    background: rgba(11, 9, 6, 0.6);
    border: 1px solid var(--c-rule-faint);
    color: var(--c-text);
    transition: border-color var(--t-base), background var(--t-base),
              transform var(--t-base);
    text-decoration: none;
}

.card:hover,
.card:focus {
    border-color: var(--c-gold-antique);
    background: rgba(11, 9, 6, 0.85);
    outline: none;
}

.card h3 {
    font-family: var(--ff-heading);
    font-size: 1.0625rem;
    font-weight: 500;
    color: var(--c-ivory-soft);
    margin: 0;
    line-height: 1.3;
}

.card p {
    font-size: 0.9375rem;
    color: var(--c-text-muted);
    margin-top: var(--s-2);
    margin-bottom: 0;
}

/* Domain card variant */
.domain-card {
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    min-height: 7rem;
}

.domain-card .card-mark {
    margin-top: var(--s-3);
    font-family: var(--ff-mono);
    font-size: 0.6875rem;
    letter-spacing: 0.15em;
    color: var(--c-gold-antique);
    text-transform: uppercase;
}

/* ---------------------------------------------------------------------------
   10. PROOF GATE LEDGER
---------------------------------------------------------------------------- */
.gate-ledger {
    margin-top: var(--s-5);
    border-top: 1px solid var(--c-rule-soft);
}

.gate {
    display: grid;
    grid-template-columns: 5rem 1fr 9rem;
    gap: var(--s-4);
    padding: var(--s-4) 0;
    border-bottom: 1px solid var(--c-rule-faint);
    align-items: baseline;
}

.gate-number {
    font-family: var(--ff-mono);
    font-size: 0.8125rem;
    font-weight: 500;
    letter-spacing: 0.1em;
    color: var(--c-gold-antique);
    text-transform: uppercase;
}

.gate-body h3 {
    font-family: var(--ff-heading);
    font-size: 1.125rem;
    margin: 0 0 var(--s-1) 0;
    color: var(--c-ivory-soft);
}

.gate-body p {
    font-size: 0.9375rem;
    color: var(--c-text-muted);
    margin: 0;
    max-width: none;
}

.gate-status {
    font-family: var(--ff-mono);
    font-size: 0.6875rem;
    letter-spacing: 0.14em;
    text-transform: uppercase;
    color: var(--c-parchment);
    text-align: right;
    justify-self: end;
}

.gate-status[data-status="survived"] {
    color: var(--c-gold-antique);
}

.gate-status[data-status="extended"] {
    color: var(--c-gold-highlight);
}

.gate-status[data-status="open"] {
    color: var(--c-ash);
}

.gate.gate-radical {
    background: rgba(166, 136, 76, 0.05);
    padding-left: var(--s-3);
    padding-right: var(--s-3);
    border-bottom-color: var(--c-rule-soft);
}

.gate.gate-radical .gate-number {
    color: var(--c-gold-highlight);
}

/* ---------------------------------------------------------------------------
   11. HISTORICAL FAILURE — case cards + archive table
---------------------------------------------------------------------------- */
.failure-group {
    margin-top: var(--s-7);
}

.failure-group-header {
    font-family: var(--ff-mono);
    font-size: 0.75rem;
    letter-spacing: 0.18em;
    text-transform: uppercase;
    color: var(--c-gold-antique);
    margin-bottom: var(--s-3);
    padding-bottom: var(--s-2);
    border-bottom: 1px solid var(--c-rule-soft);
}

.case-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(20rem, 1fr));
    gap: var(--s-3);
}

.case-card {
    padding: var(--s-4);
    background: rgba(7, 6, 4, 0.7);
    border: 1px solid var(--c-rule-faint);
    position: relative;
}

.case-card h3 {
    font-family: var(--ff-heading);
    font-size: 1.0625rem;
    margin: 0 0 var(--s-2) 0;
    color: var(--c-ivory-soft);
}

.case-card dl {
    display: grid;
    grid-template-columns: 9.5rem 1fr;
    row-gap: var(--s-1);
    column-gap: var(--s-2);
    font-size: 0.875rem;
    line-height: 1.45;
}

.case-card dt {
    font-family: var(--ff-mono);
    font-size: 0.6875rem;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--c-gold-antique);
    padding-top: 0.2em;
}

.case-card dd {
    margin: 0;
    color: var(--c-text);
}

/* Archive table */
.archive-table {
    width: 100%;
    margin-top: var(--s-6);
    font-size: 0.8125rem;
    font-family: var(--ff-body);
    border-top: 1px solid var(--c-rule-soft);
    border-bottom: 1px solid var(--c-rule-soft);
}

.archive-table thead th {
    font-family: var(--ff-mono);
    font-size: 0.6875rem;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--c-gold-antique);
    text-align: left;
    padding: var(--s-3) var(--s-2);
    border-bottom: 1px solid var(--c-rule-soft);
    vertical-align: bottom;
    font-weight: 500;
}

.archive-table td {
    padding: var(--s-3) var(--s-2);
    border-bottom: 1px solid var(--c-rule-faint);
    vertical-align: top;
    color: var(--c-text-muted);
}

.archive-table tbody tr:hover td {
    background: rgba(166, 136, 76, 0.04);
    color: var(--c-text);
}

.archive-table td:first-child {
    color: var(--c-ivory-soft);
    font-weight: 500;
}

/* ---------------------------------------------------------------------------
   12. DOMAIN PAGE — motif banner
---------------------------------------------------------------------------- */
.domain-banner {
    width: 100%;
    height: 9rem;
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    border-top: 1px solid var(--c-rule-faint);
    border-bottom: 1px solid var(--c-rule-faint);
    margin-top: 0;
}

.domain-banner[data-motif="sovereign"] {
    background-image: url("../img/motifs/motif-sovereign.jpg");
}

.domain-banner[data-motif="ai"] {
    background-image: url("../img/motifs/motif-ai-platforms.png");
}

.domain-banner[data-motif="enterprise"] {
    background-image: url("../img/motifs/motif-enterprise.jpg");
}

.domain-banner[data-motif="government"] {
    background-image: url("../img/motifs/motif-government.png");
}

.domain-banner[data-motif="medicine"] {
    background-image: url("../img/motifs/motif-medicine.png");
}

.domain-banner[data-motif="finance"] {
    background-image: url("../img/motifs/motif-finance.png");
}

.domain-banner[data-motif="media"] {
    background-image: url("../img/motifs/motif-media.png");
}

/* ---------------------------------------------------------------------------
   13. FORMS
---------------------------------------------------------------------------- */
.form-block {
    margin-top: var(--s-5);
    padding-top: var(--s-5);
    border-top: 1px solid var(--c-rule-soft);
}

.form-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--s-3) var(--s-4);
    max-width: 44rem;
}

.field {
    display: flex;
    flex-direction: column;
    gap: var(--s-1);
}

.field.full {
    grid-column: 1 / -1;
}

.field label {
    font-family: var(--ff-mono);
    font-size: 0.6875rem;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--c-gold-antique);
    font-weight: 500;
}

.field .field-note {
    font-size: 0.75rem;
    color: var(--c-text-muted);
    font-family: var(--ff-body);
    letter-spacing: 0;
    text-transform: none;
    margin-top: 0.1rem;
}

.field input[type="text"],
.field input[type="email"],
.field input[type="url"],
.field input[type="tel"],
.field input[type="number"],
.field select,
.field textarea {
    background: rgba(7, 6, 4, 0.7);
    border: 1px solid var(--c-rule-faint);
    color: var(--c-ivory-soft);
    font-family: var(--ff-body);
    font-size: 0.9375rem;
    padding: var(--s-2) var(--s-3);
    transition: border-color var(--t-base), background var(--t-base);
    width: 100%;
}

.field textarea {
    min-height: 7rem;
    resize: vertical;
}

.field input:focus,
.field select:focus,
.field textarea:focus {
    border-color: var(--c-gold-antique);
    background: rgba(11, 9, 6, 0.9);
    outline: none;
}

.field-checkbox {
    display: flex;
    align-items: flex-start;
    gap: var(--s-2);
    font-size: 0.875rem;
    color: var(--c-text);
    cursor: pointer;
    line-height: 1.45;
}

.field-checkbox input[type="checkbox"] {
    margin-top: 0.25em;
    width: 1rem;
    height: 1rem;
    accent-color: var(--c-gold-antique);
    flex-shrink: 0;
}

.form-actions {
    margin-top: var(--s-4);
    display: flex;
    align-items: center;
    gap: var(--s-3);
    flex-wrap: wrap;
}

.form-message {
    font-size: 0.875rem;
    color: var(--c-text-muted);
    font-family: var(--ff-body);
}

.form-message.is-success {
    color: var(--c-gold-highlight);
    font-family: var(--ff-heading);
    font-size: var(--fs-body-lg);
    font-style: italic;
}

.form-message.is-error {
    color: var(--c-ember);
}

/* ---------------------------------------------------------------------------
   14. STICKY IN-PAGE TOC (desktop)
---------------------------------------------------------------------------- */
.page-with-toc {
    display: grid;
    grid-template-columns: 14rem 1fr;
    gap: var(--s-7);
    align-items: start;
    max-width: var(--w-container-wide);
    margin: 0 auto;
    padding: var(--s-5) var(--s-4);
}

.toc {
    position: sticky;
    top: 5rem;
    border-left: 1px solid var(--c-rule-faint);
    padding-left: var(--s-3);
    font-size: 0.8125rem;
    font-family: var(--ff-body);
    line-height: 1.5;
}

.toc-label {
    font-family: var(--ff-mono);
    font-size: 0.625rem;
    letter-spacing: 0.18em;
    text-transform: uppercase;
    color: var(--c-gold-antique);
    margin-bottom: var(--s-2);
    display: block;
}

.toc ol {
    display: flex;
    flex-direction: column;
    gap: var(--s-1);
}

.toc a {
    display: block;
    color: var(--c-text-muted);
    padding: var(--s-0) 0;
    border-left: 2px solid transparent;
    padding-left: var(--s-2);
    margin-left: -1rem;
    transition: color var(--t-base), border-color var(--t-base);
}

.toc a:hover {
    color: var(--c-ivory-soft);
}

.toc a.is-active {
    color: var(--c-gold-antique);
    border-left-color: var(--c-gold-antique);
}

/* Mobile jump menu */
.jump-menu {
    display: none;
    margin-bottom: var(--s-4);
}

.jump-menu-toggle {
    display: flex;
    align-items: center;
    justify-content: space-between;
    width: 100%;
    padding: var(--s-2) var(--s-3);
    background: rgba(11, 9, 6, 0.7);
    border: 1px solid var(--c-rule-faint);
    font-family: var(--ff-mono);
    font-size: 0.75rem;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--c-gold-antique);
}

.jump-menu-list {
    display: none;
    margin-top: var(--s-2);
    padding: var(--s-3);
    background: rgba(7, 6, 4, 0.95);
    border: 1px solid var(--c-rule-faint);
}

.jump-menu.is-open .jump-menu-list {
    display: block;
}

.jump-menu-list ol {
    display: flex;
    flex-direction: column;
    gap: var(--s-1);
}

.jump-menu-list a {
    display: block;
    padding: var(--s-1) 0;
    color: var(--c-text-muted);
    font-size: 0.875rem;
}

.jump-menu-list a:hover {
    color: var(--c-ivory-soft);
}

/* ---------------------------------------------------------------------------
   15. PAGE INTRO
---------------------------------------------------------------------------- */
.page-intro {
    padding-top: var(--s-7);
    padding-bottom: var(--s-6);
}

.page-intro .lede {
    margin-top: var(--s-3);
    font-size: var(--fs-lede);
}

/* ---------------------------------------------------------------------------
   16. FOOTER
---------------------------------------------------------------------------- */
.site-footer {
    background: var(--c-black-absolute);
    background-image: url("../img/void-field-streak.png");
    background-size: cover;
    background-position: center bottom;
    background-blend-mode: overlay;
    border-top: 1px solid var(--c-rule-soft);
    padding: var(--s-7) 0 var(--s-5) 0;
    margin-top: var(--s-9);
    color: var(--c-text-muted);
    font-size: 0.875rem;
}

.site-footer .container {
    display: flex;
    flex-direction: column;
    gap: var(--s-5);
    max-width: var(--w-container-wide);
}

.footer-mark {
    display: flex;
    align-items: center;
    gap: var(--s-3);
    font-family: var(--ff-heading);
    font-style: italic;
    font-size: 1.0625rem;
    color: var(--c-parchment);
}

.footer-mark img {
    width: 1.75rem;
    height: 1.75rem;
    opacity: 0.85;
}

.footer-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--s-5);
}

.footer-col h4 {
    font-family: var(--ff-mono);
    font-size: 0.6875rem;
    letter-spacing: 0.18em;
    text-transform: uppercase;
    color: var(--c-gold-antique);
    margin-bottom: var(--s-3);
    font-weight: 500;
}

.footer-col ul {
    display: flex;
    flex-direction: column;
    gap: var(--s-1);
}

.footer-col a {
    color: var(--c-text-muted);
    transition: color var(--t-base);
    font-size: 0.9375rem;
}

.footer-col a:hover {
    color: var(--c-gold-highlight);
}

.footer-legal {
    font-size: 0.75rem;
    color: var(--c-ivory-muted);
    border-top: 1px solid var(--c-rule-faint);
    padding-top: var(--s-4);
    max-width: var(--w-content);
    line-height: 1.55;
}

/* ---------------------------------------------------------------------------
   17. UTILITIES
---------------------------------------------------------------------------- */
.text-center {
    text-align: center;
}

.text-right {
    text-align: right;
}

.text-muted {
    color: var(--c-text-muted);
}

.text-soft {
    color: var(--c-parchment);
}

.text-gold {
    color: var(--c-gold-antique);
}

.text-mono {
    font-family: var(--ff-mono);
}

.no-margin {
    margin: 0;
}

.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;
}

/* Pull-quote / gravity line */
.pull-quote {
    font-family: var(--ff-heading);
    font-size: var(--fs-lede);
    line-height: 1.45;
    font-style: italic;
    color: var(--c-parchment);
    border-left: 1px solid var(--c-gold-antique);
    padding-left: var(--s-4);
    margin: var(--s-5) 0;
    max-width: var(--w-content);
}

/* Boundary statement (used on domain / medicine / finance pages) */
.boundary-note {
    font-family: var(--ff-mono);
    font-size: 0.8125rem;
    letter-spacing: 0.04em;
    color: var(--c-parchment);
    border: 1px solid var(--c-rule-faint);
    padding: var(--s-3) var(--s-4);
    background: rgba(11, 9, 6, 0.4);
    margin: var(--s-4) 0;
}

.boundary-note strong {
    color: var(--c-gold-antique);
    font-family: var(--ff-mono);
    font-weight: 500;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    font-size: 0.6875rem;
    display: block;
    margin-bottom: var(--s-1);
}

/* ---------------------------------------------------------------------------
   18. RESPONSIVE — tablet (≤ 1024px)
---------------------------------------------------------------------------- */
@media (max-width: 1024px) {
    :root {
        --fs-hero: 2.75rem;
        --fs-hero-lg: 3.5rem;
        --fs-h1: 2.125rem;
        --fs-h2: 1.625rem;
    }

    /* Collapse nav to drawer */
    .nav-toggle {
        display: inline-flex;
    }

    .nav {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: rgba(3, 3, 2, 0.98);
        backdrop-filter: blur(20px);
        -webkit-backdrop-filter: blur(20px);
        border-bottom: 1px solid var(--c-rule-soft);
        flex-direction: column;
        align-items: stretch;
        padding: var(--s-4);
        gap: 0;
        max-height: calc(100vh - 4rem);
        overflow-y: auto;
    }

    .nav.is-open {
        display: flex;
    }

    .nav a {
        padding: var(--s-2) 0;
        border-bottom: 1px solid var(--c-rule-faint);
        font-size: 0.9375rem;
        color: var(--c-text);
    }

    .nav a:hover,
    .nav a:focus {
        border-bottom-color: var(--c-rule-faint);
        color: var(--c-gold-highlight);
    }

    .nav-group-label {
        display: block;
        font-family: var(--ff-mono);
        font-size: 0.6875rem;
        letter-spacing: 0.18em;
        text-transform: uppercase;
        color: var(--c-gold-antique);
        padding-top: var(--s-4);
        padding-bottom: var(--s-2);
        border-bottom: 0;
    }

    .nav-group-label:first-child {
        padding-top: 0;
    }

    /* Hero stacks: cover above text on tablet/mobile */
    .hero-grid {
        grid-template-columns: 1fr;
        gap: var(--s-5);
        text-align: left;
        padding-top: var(--s-5);
    }

    .hero-cover {
        order: -1;
        max-width: 18rem;
        margin: 0;
    }

    .hero-cover img {
        max-height: 50vh;
    }

    /* TOC stacks above content */
    .page-with-toc {
        grid-template-columns: 1fr;
        gap: var(--s-4);
    }

    .toc {
        display: none;
    }

    .jump-menu {
        display: block;
    }

    /* Footer grid stacks */
    .footer-grid {
        grid-template-columns: 1fr 1fr;
        gap: var(--s-4);
    }

    /* Gate ledger reflow */
    .gate {
        grid-template-columns: 1fr;
        gap: var(--s-1);
    }

    .gate-status {
        text-align: left;
        justify-self: start;
    }

    /* Case card grid */
    .case-grid {
        grid-template-columns: 1fr;
    }
}

/* ---------------------------------------------------------------------------
   19. RESPONSIVE — mobile (≤ 640px)
---------------------------------------------------------------------------- */
@media (max-width: 640px) {
    :root {
        --fs-body: 1rem;
        --fs-h1: 1.875rem;
        --fs-h2: 1.5rem;
        --fs-lede: 1.1875rem;
    }

    body {
        background-attachment: scroll;
    }

    .container {
        padding-left: var(--s-3);
        padding-right: var(--s-3);
    }

    section {
        padding-top: var(--s-5);
        padding-bottom: var(--s-5);
    }

    h1 .tm {
        font-size: 0.5em;
    }

    .btn {
        padding: 0.75rem 1rem;
        font-size: 0.75rem;
    }

    .hero-cta {
        gap: var(--s-2);
    }

    .hero-cta .btn {
        width: 100%;
    }

    .footer-grid {
        grid-template-columns: 1fr;
    }

    /* Form grid stacks */
    .form-grid {
        grid-template-columns: 1fr;
    }

    /* Case card dl reflow */
    .case-card dl {
        grid-template-columns: 1fr;
        row-gap: 0.25rem;
    }

    .case-card dt {
        padding-top: var(--s-1);
    }

    /* Archive table — convert to stacked block */
    .archive-table thead {
        display: none;
    }

    .archive-table,
    .archive-table tbody,
    .archive-table tr,
    .archive-table td {
        display: block;
        width: 100%;
    }

    .archive-table tr {
        border-bottom: 1px solid var(--c-rule-soft);
        padding: var(--s-3) 0;
    }

    .archive-table td {
        padding: var(--s-0) 0;
        border: 0;
    }

    .archive-table td::before {
        content: attr(data-label) " · ";
        font-family: var(--ff-mono);
        font-size: 0.6875rem;
        letter-spacing: 0.1em;
        text-transform: uppercase;
        color: var(--c-gold-antique);
    }

    .archive-table td:first-child::before {
        content: "";
    }
}

/* ---------------------------------------------------------------------------
   20. PRINT
---------------------------------------------------------------------------- */
@media print {
    body {
        background: white;
        color: black;
    }

    .site-header,
    .site-footer,
    .hero-cta,
    .nav-toggle,
    .toc {
        display: none;
    }

    a {
        color: black;
        text-decoration: underline;
    }
}

/* ---------------------------------------------------------------------------
   21. REDUCED MOTION
---------------------------------------------------------------------------- */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }
}

/* ---------------------------------------------------------------------------
   22. PROSE LISTS & VULNERABILITY DL
---------------------------------------------------------------------------- */
.prose-list {
    margin: var(--s-3) 0 var(--s-4) 0;
    padding-left: 0;
    max-width: var(--w-content);
}

.prose-list li {
    padding: var(--s-1) 0 var(--s-1) var(--s-4);
    position: relative;
    color: var(--c-text);
    line-height: var(--lh-base);
}

.prose-list li::before {
    content: "—";
    position: absolute;
    left: 0;
    color: var(--c-gold-antique);
    font-family: var(--ff-mono);
}

.vulnerability-list {
    margin-top: var(--s-4);
    max-width: var(--w-content);
}

.vulnerability-list dt {
    font-family: var(--ff-heading);
    font-size: 1.0625rem;
    font-weight: 500;
    color: var(--c-ivory-soft);
    margin-top: var(--s-4);
    padding-top: var(--s-3);
    border-top: 1px solid var(--c-rule-faint);
}

.vulnerability-list dt:first-child {
    margin-top: 0;
    padding-top: 0;
    border-top: 0;
}

.vulnerability-list dd {
    margin: var(--s-1) 0 0 0;
    color: var(--c-text-muted);
    font-size: var(--fs-body);
    line-height: var(--lh-base);
}

/* ---------------------------------------------------------------------------
   23. HISTORICAL FAILURE — additional polish
---------------------------------------------------------------------------- */
.failure-group-intro {
    font-family: var(--ff-heading);
    font-size: 1rem;
    font-style: italic;
    color: var(--c-parchment);
    margin-bottom: var(--s-4);
    max-width: var(--w-content);
}

.archive-scroll {
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    margin: var(--s-4) -1rem 0;
    padding: 0 1rem;
}

@media (max-width: 1024px) {
    .archive-scroll {
        overflow-x: visible;
        margin: var(--s-4) 0 0;
        padding: 0;
    }
}

@media (max-width: 640px) {
    .archive-scroll table {
        font-size: 0.875rem;
    }
}

/* ---------------------------------------------------------------------------
   24. STAR-SUBSTRATE DEPLOYMENT (context-aware texture layer)
   ----------------------------------------------------------------------------
   Same vocabulary (sparse starfield), different intensity by spatial function.
   Applied as a low-opacity layer on specific section types so the void reads
   with depth without competing with text. Deployment matches the locked
   asset strategy:
     sparse  → body prose (maximum legibility)
     even    → domain pages, proof sections
     dense   → service / case-card contexts
     warm    → hero, footer, theorem anchors
---------------------------------------------------------------------------- */
/* Hero sections get the warm substrate as a quiet atmospheric anchor */
.hero {
    position: relative;
    isolation: isolate;
}

.hero::before {
    content: "";
    position: absolute;
    inset: 0;
    z-index: -1;
    background-image: url("../img/substrate/star-substrate-warm.png");
    background-size: cover;
    background-position: center;
    opacity: 0.5;
    pointer-events: none;
}

/* Page-intro sections (domain headers, proof intro) get the even substrate */
.page-intro {
    position: relative;
    isolation: isolate;
}

.page-intro::before {
    content: "";
    position: absolute;
    inset: 0;
    z-index: -1;
    background-image: url("../img/substrate/star-substrate-even.png");
    background-size: cover;
    background-position: center;
    opacity: 0.4;
    pointer-events: none;
}

/* Review / form sections get the dense substrate (engagement contexts) */
.review-section {
    position: relative;
    isolation: isolate;
}

.review-section::before {
    content: "";
    position: absolute;
    inset: 0;
    z-index: -1;
    background-image: url("../img/substrate/star-substrate-dense.png");
    background-size: cover;
    background-position: center;
    opacity: 0.3;
    pointer-events: none;
}

/* Footer gets the warm substrate layered with the streak background already set */
.site-footer {
    position: relative;
    isolation: isolate;
}

.site-footer::before {
    content: "";
    position: absolute;
    inset: 0;
    z-index: 0;
    background-image: url("../img/substrate/star-substrate-warm.png");
    background-size: cover;
    background-position: center bottom;
    opacity: 0.35;
    pointer-events: none;
}

.site-footer .container {
    position: relative;
    z-index: 1;
}

/* Reduce substrate intensity on mobile to preserve legibility + performance */
@media (max-width: 640px) {
    .hero::before,
    .page-intro::before,
    .review-section::before,
    .site-footer::before {
        opacity: 0.25;
    }
}