/* changespec.org Design Tokens
 *
 * Distinct from changespec.com tokens by intent.
 * Visual register: institutional, document-forward, RFC-adjacent.
 * Typography: Palatino serif body + monospace UI chrome (no sans).
 * Color: cooler stone palette, single slate accent.
 * Layout: narrower columns, higher density.
 */

:root {
  /* ---- Typography ---- */

  /* Body: Palatino-first institutional serif
   * More formal than .com's Charter/Georgia stack.
   * No web font loaded. */
  --font-body: 'Palatino Linotype', Palatino, 'Book Antiqua', Georgia, 'Times New Roman', serif;

  /* UI chrome, nav, labels, metadata: monospace throughout
   * (no sans-serif on this site - inverts .com's body-sans pattern) */
  --font-mono: 'Berkeley Mono', ui-monospace, 'Cascadia Code', 'Source Code Pro',
    Menlo, Consolas, 'Courier New', monospace;

  /* Alias for display headings - same serif as body, heavier weight */
  --font-display: 'Palatino Linotype', Palatino, 'Book Antiqua', Georgia, 'Times New Roman', serif;

  /* Type scale - conservative, document-appropriate */
  --text-xs:   0.75rem;     /* 12px */
  --text-sm:   0.875rem;    /* 14px - was 13px, minimum for body content */
  --text-base: 0.9375rem;   /* 15px */
  --text-md:   1rem;        /* 16px */
  --text-lg:   1.125rem;    /* 18px */
  --text-xl:   1.375rem;    /* 22px */
  --text-2xl:  1.75rem;     /* 28px */
  --text-3xl:  2.125rem;    /* 34px - slightly smaller than .com */
  --text-4xl:  2.75rem;     /* 44px */

  /* Line heights - generous for serif body text */
  --leading-tight:    1.25;
  --leading-snug:     1.4;
  --leading-normal:   1.65;  /* more generous than .com's 1.55 for Palatino */
  --leading-loose:    1.8;

  /* ---- Spacing ---- */
  --space-1:  0.25rem;
  --space-2:  0.5rem;
  --space-3:  0.75rem;
  --space-4:  1rem;
  --space-5:  1.25rem;
  --space-6:  1.5rem;
  --space-8:  2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-20: 5rem;
  --space-24: 6rem;

  /* ---- Color: cooler stone palette ---- */
  /* Stone white, not warm cream (diverges from .com's #f9f7f4) */
  --color-bg:               #f5f5f0;
  --color-bg-alt:           #edede8;
  --color-bg-code:          #e8e8e2;
  --color-bg-code-block:    #1c1c1a;
  --color-surface:          #ffffff;
  --color-surface-raised:   #f5f5f0;
  --color-border:           #c8c8c0;
  --color-border-strong:    #9a9a90;

  /* Text: cooler near-black (not .com's warm #1a1916) */
  --color-text-primary:     #1c1c1a;
  --color-text-secondary:   #525250;
  --color-text-tertiary:    #686866;  /* was #7a7a78; darkened to meet 4.5:1 on all light surfaces */
  --color-text-inverse:     #f5f5f0;
  --color-text-code:        #e0e0da;

  /* Single accent: muted slate-blue, NOT .com's teal */
  --color-accent:           #3d5a73;
  --color-accent-hover:     #2d4558;
  --color-accent-subtle:    #d0dce8;

  /* Severity colors - same muted principle, slightly desaturated vs .com */
  --color-severity-critical:    #7a1a1a;
  --color-severity-critical-bg: #f5eaea;
  --color-severity-high:        #7a4a1a;
  --color-severity-high-bg:     #f5eeea;
  --color-severity-medium:      #68681a;
  --color-severity-medium-bg:   #f5f4ea;
  --color-severity-low:         #1a5a1a;
  --color-severity-low-bg:      #eaf4ea;
  --color-severity-info:        #1a487a;
  --color-severity-info-bg:     #eaeff5;

  /* ---- Layout: narrower than .com ---- */
  --max-width-content: 42rem;   /* 672px - RFC-width prose column */
  --max-width-wide:    60rem;   /* 960px - tables, code, conformance matrices */
  /* No max-width-full - this site does not use wide layouts */

  /* ---- Borders and radii ---- */
  /* Slightly squarer than .com - less decorative */
  --radius-sm: 1px;
  --radius:    2px;
  --radius-md: 3px;

  /* ---- Transitions - minimal ---- */
  --transition-fast: 100ms ease;
  --transition-base: 160ms ease;

  /* ---- Shadows - very light, almost none ---- */
  --shadow-sm: 0 1px 2px rgba(28, 28, 26, 0.06);
  --shadow:    0 2px 6px rgba(28, 28, 26, 0.08);
}

/* Dark mode */
@media (prefers-color-scheme: dark) {
  :root {
    --color-bg:               #181817;
    --color-bg-alt:           #1f1f1e;
    --color-bg-code:          #1f1f1e;
    --color-bg-code-block:    #111110;
    --color-surface:          #1f1f1e;
    --color-surface-raised:   #252524;
    --color-border:           #383836;
    --color-border-strong:    #585855;

    --color-text-primary:     #e4e4e0;
    --color-text-secondary:   #9c9c98;
    --color-text-tertiary:    #929290;  /* was #686866; lightened to meet 4.5:1 on dark surfaces */
    --color-text-inverse:     #181817;
    --color-text-code:        #e4e4e0;

    --color-accent:           #7aa0bf;
    --color-accent-hover:     #90b4d0;
    --color-accent-subtle:    #1e2d38;

    --color-severity-critical:    #d87070;
    --color-severity-critical-bg: #281414;
    --color-severity-high:        #d89870;
    --color-severity-high-bg:     #281c14;
    --color-severity-medium:      #c8c870;
    --color-severity-medium-bg:   #222214;
    --color-severity-low:         #70c870;
    --color-severity-low-bg:      #142814;
    --color-severity-info:        #70a0c8;
    --color-severity-info-bg:     #141c28;
  }
}
/* Base reset and foundational element styles
 * changespec.org - serif body, monospace chrome, no sans-serif */

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

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

@media (prefers-reduced-motion: no-preference) {
  html {
    scroll-behavior: smooth;
  }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
}

body {
  font-family: var(--font-body);
  font-size: var(--text-base);
  line-height: var(--leading-normal);
  color: var(--color-text-primary);
  background-color: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* Skip link */
.skip-link {
  position: absolute;
  top: -100%;
  left: var(--space-4);
  background: var(--color-text-primary);
  color: var(--color-text-inverse);
  padding: var(--space-2) var(--space-4);
  font-size: var(--text-sm);
  font-family: var(--font-mono);
  text-decoration: none;
  z-index: 100;
}

.skip-link:focus {
  top: 0;
}

/* Links */
a {
  color: var(--color-accent);
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 2px;
  transition: color var(--transition-fast);
}

a:hover {
  color: var(--color-accent-hover);
}

a:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}

/* Headings - same serif as body, heavier weight */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-display);
  line-height: var(--leading-tight);
  color: var(--color-text-primary);
  font-weight: 700;
}

h1 { font-size: var(--text-3xl); }
h2 { font-size: var(--text-2xl); }
h3 { font-size: var(--text-xl); }
h4 { font-size: var(--text-lg); }
h5 { font-size: var(--text-md); }
h6 { font-size: var(--text-base); }

/* Paragraphs */
p {
  max-width: 68ch;
  margin-bottom: var(--space-5);
}

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

/* Code */
code {
  font-family: var(--font-mono);
  font-size: 0.875em;
  background-color: var(--color-bg-code);
  padding: 1px 5px;
  border: 1px solid var(--color-border);
}

pre {
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  background-color: var(--color-bg-code-block);
  color: var(--color-text-code);
  padding: var(--space-6);
  overflow-x: auto;
  line-height: var(--leading-loose);
  tab-size: 2;
}

pre code {
  font-size: inherit;
  background: none;
  border: none;
  padding: 0;
  color: inherit;
}

/* Tables */
table {
  width: 100%;
  border-collapse: collapse;
  font-size: var(--text-sm);
  font-family: var(--font-body);
}

th {
  text-align: left;
  font-weight: 600;
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  text-transform: uppercase;
  letter-spacing: 0.07em;
  color: var(--color-text-secondary);
  padding: var(--space-2) var(--space-3);
  border-bottom: 2px solid var(--color-border-strong);
}

td {
  padding: var(--space-2) var(--space-3);
  border-bottom: 1px solid var(--color-border);
  vertical-align: top;
}

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

/* Horizontal rule */
hr {
  border: none;
  border-top: 1px solid var(--color-border);
  margin: var(--space-8) 0;
}

/* Lists */
ul, ol {
  padding-left: var(--space-6);
}

li {
  margin-bottom: var(--space-1);
  line-height: var(--leading-snug);
}

/* Nested lists */
li > ul,
li > ol {
  margin-top: var(--space-1);
}

/* Blockquote - used for RFC-style normative language */
blockquote {
  border-left: 3px solid var(--color-border-strong);
  padding-left: var(--space-5);
  color: var(--color-text-secondary);
  font-style: italic;
  margin: var(--space-6) 0;
}

/* Images */
img {
  max-width: 100%;
  height: auto;
}

/* Focus for interactive elements */
button:focus-visible,
input:focus-visible,
select:focus-visible,
textarea:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}

/* Selection */
::selection {
  background-color: var(--color-accent-subtle);
  color: var(--color-text-primary);
}

/* Definition terms - used in governance docs */
dt {
  font-weight: 700;
  margin-top: var(--space-4);
}

dd {
  padding-left: var(--space-6);
  color: var(--color-text-secondary);
  margin-top: var(--space-1);
}
/* Layout system - changespec.org
 * Narrower columns, denser spacing, document-forward.
 * Header scrolls with page (not sticky) - standards documents convention. */

/* ---- Site header ---- */

.site-header {
  border-bottom: 1px solid var(--color-border);
  background-color: var(--color-bg);
}

.site-header__inner {
  max-width: var(--max-width-wide);
  margin: 0 auto;
  padding: 0 var(--space-6);
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 2.75rem;
  gap: var(--space-6);
}

/* Logo: monospace, no version indicator in logo area (version in page content) */
.site-logo {
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--color-text-primary);
  text-decoration: none;
  letter-spacing: -0.01em;
  flex-shrink: 0;
}

.site-logo:hover {
  color: var(--color-text-primary);
  text-decoration: none;
}

/* Org suffix - makes clear this is the .org site */
.site-logo__org {
  font-weight: 400;
  color: var(--color-text-tertiary);
  font-size: var(--text-xs);
  letter-spacing: 0;
}

/* Navigation: monospace, denser, no animations */
.site-nav {
  display: flex;
  align-items: center;
  gap: var(--space-5);
}

.site-nav a {
  font-size: var(--text-sm);
  font-family: var(--font-mono);
  color: var(--color-text-secondary);
  text-decoration: none;
  white-space: nowrap;
  text-transform: lowercase;
  letter-spacing: 0.02em;
}

.site-nav a:hover {
  color: var(--color-text-primary);
}

.site-nav a.active {
  color: var(--color-text-primary);
  font-weight: 600;
}

.site-header__actions {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  flex-shrink: 0;
}

.site-header__github {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--color-text-tertiary);
  text-decoration: none;
  border: 1px solid var(--color-border);
  padding: var(--space-2) var(--space-3);
  display: inline-flex;
  align-items: center;
}

.site-header__github:hover {
  color: var(--color-text-secondary);
  border-color: var(--color-border-strong);
}

/* ---- Content containers ---- */

.container {
  max-width: var(--max-width-content);
  margin: 0 auto;
  padding: 0 var(--space-6);
}

.container--wide {
  max-width: var(--max-width-wide);
  margin: 0 auto;
  padding: 0 var(--space-6);
}

/* ---- Spec page layout: sidebar TOC + content ---- */

.page-with-sidebar {
  display: grid;
  grid-template-columns: 13rem 1fr;
  gap: var(--space-10);
  max-width: var(--max-width-wide);
  margin: 0 auto;
  padding: var(--space-8) var(--space-6);
  align-items: start;
}

.sidebar {
  position: sticky;
  top: var(--space-8);
  max-height: calc(100vh - var(--space-16));
  overflow-y: auto;
}

.sidebar::-webkit-scrollbar {
  width: 2px;
}

.sidebar::-webkit-scrollbar-track {
  background: transparent;
}

.sidebar::-webkit-scrollbar-thumb {
  background: var(--color-border);
}

/* ---- Section spacing - tighter than .com ---- */

.section {
  padding: var(--space-10) 0;
}

.section + .section {
  border-top: 1px solid var(--color-border);
}

.section--tight {
  padding: var(--space-8) 0;
}

/* ---- Page header ---- */

.page-header {
  padding: var(--space-12) 0 var(--space-8);
  border-bottom: 1px solid var(--color-border);
}

.page-header__label {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-text-tertiary);
  margin-bottom: var(--space-3);
}

.page-header__title {
  font-size: var(--text-3xl);
  margin-bottom: var(--space-4);
  max-width: 36ch;
}

.page-header__description {
  font-size: var(--text-md);
  color: var(--color-text-secondary);
  max-width: 56ch;
  line-height: var(--leading-snug);
  font-style: italic;
  margin-bottom: 0;
}

/* ---- Site footer ---- */

.site-footer {
  border-top: 1px solid var(--color-border);
  padding: var(--space-10) 0;
  margin-top: var(--space-20);
}

.site-footer__inner {
  max-width: var(--max-width-wide);
  margin: 0 auto;
  padding: 0 var(--space-6);
  display: grid;
  grid-template-columns: 1fr auto;
  gap: var(--space-8);
  align-items: start;
}

.site-footer__meta {
  font-size: var(--text-xs);
  font-family: var(--font-mono);
  color: var(--color-text-tertiary);
  line-height: var(--leading-loose);
}

.site-footer__meta p {
  margin-bottom: var(--space-1);
  max-width: none;
}

.site-footer__links {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  text-align: right;
}

.site-footer__links a {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--color-text-tertiary);
  text-decoration: none;
}

.site-footer__links a:hover {
  color: var(--color-text-secondary);
}

/* ---- Responsive ---- */

@media (max-width: 48rem) {
  .site-header__inner {
    padding: 0 var(--space-4);
    height: 2.5rem;
    overflow: hidden;
  }

  .site-nav {
    gap: var(--space-3);
  }

  .container,
  .container--wide {
    padding: 0 var(--space-4);
  }

  .page-with-sidebar {
    grid-template-columns: 1fr;
    padding: var(--space-6) var(--space-4);
  }

  .sidebar {
    position: static;
    max-height: none;
    border-bottom: 1px solid var(--color-border);
    padding-bottom: var(--space-5);
    margin-bottom: var(--space-5);
  }

  .site-footer__inner {
    grid-template-columns: 1fr;
    padding: 0 var(--space-4);
  }

  .site-footer__links {
    text-align: left;
    flex-direction: row;
    flex-wrap: wrap;
    gap: var(--space-3);
  }

  .site-footer__links a {
    padding: var(--space-1) 0;
  }

  .page-header {
    padding: var(--space-8) 0 var(--space-6);
  }

  .page-header__title {
    font-size: var(--text-2xl);
  }

  table {
    display: block;
    overflow-x: auto;
    max-width: 100%;
    -webkit-overflow-scrolling: touch;
  }
}

@media (max-width: 30rem) {
  .site-header__inner {
    flex-wrap: wrap;
    height: auto;
    padding-top: var(--space-3);
    padding-bottom: var(--space-3);
    gap: var(--space-2);
    overflow: visible;
  }

  .site-header__actions {
    margin-left: auto;
  }

  .site-nav {
    order: 3;
    width: 100%;
    flex-wrap: wrap;
    gap: var(--space-3);
    padding-top: var(--space-3);
    border-top: 1px solid var(--color-border);
  }

  .site-nav a {
    font-size: var(--text-xs);
    padding: var(--space-1) 0;
  }

  h1 { font-size: var(--text-2xl); }
  h2 { font-size: var(--text-xl); }
  h3 { font-size: var(--text-lg); }
}
/* Components - changespec.org
 * Spec version badges, conformance tables, signatory lists,
 * announcement items, working group cards. */

/* ---- Spec version badge ---- */

.spec-version-badge {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  border: 1px solid var(--color-border-strong);
  background: var(--color-bg-alt);
  color: var(--color-text-secondary);
  padding: 1px 6px;
  letter-spacing: 0.04em;
  vertical-align: middle;
}

.spec-version-badge--current {
  border-color: var(--color-severity-low);
  color: var(--color-severity-low);
  background: var(--color-severity-low-bg);
}

.spec-version-badge--deprecated {
  border-color: var(--color-severity-critical);
  color: var(--color-severity-critical);
  background: var(--color-severity-critical-bg);
}

/* ---- Severity badges ---- */

.severity {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  padding: 1px 5px;
  letter-spacing: 0.04em;
}

.severity--critical {
  color: var(--color-severity-critical);
  background: var(--color-severity-critical-bg);
}

.severity--high {
  color: var(--color-severity-high);
  background: var(--color-severity-high-bg);
}

.severity--medium {
  color: var(--color-severity-medium);
  background: var(--color-severity-medium-bg);
}

.severity--low {
  color: var(--color-severity-low);
  background: var(--color-severity-low-bg);
}

.severity--informational {
  color: var(--color-severity-info);
  background: var(--color-severity-info-bg);
}

/* ---- Certification level badges ---- */

.cert-level {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  border: 1px solid var(--color-border-strong);
  padding: 1px 6px;
  color: var(--color-text-secondary);
}

/* ---- Announcement / news items ---- */

.announcement-list {
  list-style: none;
  padding: 0;
  border-top: 1px solid var(--color-border);
}

.announcement-item {
  display: grid;
  grid-template-columns: 7rem 1fr;
  gap: var(--space-4);
  padding: var(--space-4) 0;
  border-bottom: 1px solid var(--color-border);
  align-items: baseline;
}

.announcement-item__date {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--color-text-tertiary);
  white-space: nowrap;
}

.announcement-item__title {
  font-size: var(--text-base);
  font-weight: 600;
  margin-bottom: var(--space-1);
}

.announcement-item__title a {
  text-decoration: none;
  color: var(--color-text-primary);
}

.announcement-item__title a:hover {
  color: var(--color-accent);
  text-decoration: underline;
}

.announcement-item__summary {
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  margin-bottom: 0;
  max-width: 60ch;
}

/* ---- Signatory list ---- */

.signatory-section {
  margin-bottom: var(--space-8);
}

.signatory-section__label {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-text-tertiary);
  border-bottom: 1px solid var(--color-border);
  padding-bottom: var(--space-2);
  margin-bottom: var(--space-5);
}

.signatory-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(14rem, 1fr));
  gap: var(--space-3);
}

.signatory-card {
  border: 1px solid var(--color-border);
  padding: var(--space-3) var(--space-4);
}

.signatory-card__name {
  font-weight: 600;
  font-size: var(--text-sm);
  margin-bottom: var(--space-1);
}

.signatory-card__affiliation {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--color-text-tertiary);
}

.signatory-placeholder {
  grid-column: 1 / -1;
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  color: var(--color-text-tertiary);
  font-style: italic;
  padding: var(--space-4) 0;
  border-top: 1px solid var(--color-border);
}

/* ---- Working group cards ---- */

.wg-list {
  list-style: none;
  padding: 0;
}

.wg-item {
  border: 1px solid var(--color-border);
  padding: var(--space-5) var(--space-6);
  margin-bottom: var(--space-3);
}

.wg-item__status {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--color-text-tertiary);
  margin-bottom: var(--space-2);
}

.wg-item__status--active {
  color: var(--color-severity-low);
}

.wg-item__status--proposed {
  color: var(--color-severity-medium);
}

.wg-item__title {
  font-size: var(--text-lg);
  font-weight: 700;
  margin-bottom: var(--space-2);
}

.wg-item__description {
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  margin-bottom: var(--space-3);
  max-width: 60ch;
}

.wg-item__meta {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--color-text-tertiary);
  display: flex;
  gap: var(--space-6);
  flex-wrap: wrap;
}

/* ---- Report index items ---- */

.report-list {
  list-style: none;
  padding: 0;
}

.report-item {
  border-bottom: 1px solid var(--color-border);
  padding: var(--space-5) 0;
}

.report-item:first-child {
  border-top: 1px solid var(--color-border);
}

.report-item__year {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--color-text-tertiary);
  margin-bottom: var(--space-2);
}

.report-item__title {
  font-size: var(--text-lg);
  font-weight: 700;
  margin-bottom: var(--space-2);
}

.report-item__title a {
  color: var(--color-text-primary);
  text-decoration: none;
}

.report-item__title a:hover {
  color: var(--color-accent);
}

.report-item__description {
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  max-width: 60ch;
  margin-bottom: var(--space-2);
}

.report-item__status {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--color-text-tertiary);
  font-style: italic;
}

/* ---- Implementations table ---- */

.impl-table {
  width: 100%;
  border-collapse: collapse;
  font-size: var(--text-sm);
}

.impl-table th {
  text-align: left;
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  text-transform: uppercase;
  letter-spacing: 0.07em;
  color: var(--color-text-secondary);
  padding: var(--space-2) var(--space-3);
  border-bottom: 2px solid var(--color-border-strong);
}

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

.impl-table tr:last-child td {
  border-bottom: none;
}

.impl-table__name {
  font-weight: 600;
}

.impl-table__lang {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--color-text-tertiary);
}

/* ---- TOC sidebar (spec page) ---- */

.toc {
  list-style: none;
  padding: 0;
}

.toc__label {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-text-tertiary);
  margin-bottom: var(--space-3);
  padding-bottom: var(--space-2);
  border-bottom: 1px solid var(--color-border);
}

.toc a {
  display: block;
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--color-text-tertiary);
  text-decoration: none;
  padding: var(--space-1) 0;
  border-left: 2px solid transparent;
  padding-left: var(--space-2);
  transition: color var(--transition-fast), border-color var(--transition-fast);
}

.toc a:hover {
  color: var(--color-text-primary);
}

.toc a.active {
  color: var(--color-accent);
  border-left-color: var(--color-accent);
}

.toc__sub {
  list-style: none;
  padding-left: var(--space-4);
}

/* ---- Spec section markers ---- */

.spec-section-number {
  font-family: var(--font-mono);
  font-size: 0.8em;
  color: var(--color-text-tertiary);
  margin-right: var(--space-2);
  font-weight: 400;
}

/* ---- Governance section ---- */

.governance-nav {
  list-style: none;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(14rem, 1fr));
  gap: var(--space-3);
  margin-bottom: var(--space-8);
}

.governance-nav__item {
  border: 1px solid var(--color-border);
  padding: var(--space-4);
}

.governance-nav__item a {
  display: block;
  text-decoration: none;
  color: var(--color-text-primary);
}

.governance-nav__item a:hover {
  color: var(--color-accent);
}

.governance-nav__title {
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  font-weight: 600;
  margin-bottom: var(--space-1);
}

.governance-nav__desc {
  font-size: var(--text-xs);
  color: var(--color-text-tertiary);
  font-family: var(--font-mono);
  max-width: none;
  margin-bottom: 0;
}

/* ---- Security contact box ---- */

.security-contact {
  border: 1px solid var(--color-border-strong);
  padding: var(--space-5) var(--space-6);
  margin: var(--space-6) 0;
  background: var(--color-bg-alt);
}

.security-contact__label {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-text-tertiary);
  margin-bottom: var(--space-3);
}

.security-contact__email {
  font-family: var(--font-mono);
  font-size: var(--text-lg);
  color: var(--color-text-primary);
  text-decoration: none;
}

.security-contact__email:hover {
  color: var(--color-accent);
}

/* ---- Code block with label ---- */

.code-block {
  margin: var(--space-5) 0;
}

.code-block__label {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--color-text-tertiary);
  border: 1px solid var(--color-border);
  border-bottom: none;
  padding: var(--space-1) var(--space-3);
  background: var(--color-bg-alt);
  display: inline-block;
}

.code-block pre {
  border: 1px solid var(--color-border);
}

/* ---- Status indicators ---- */

.status-pill {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  padding: 1px 5px;
  border: 1px solid currentColor;
  letter-spacing: 0.03em;
}

.status-pill--active {
  color: var(--color-severity-low);
}

.status-pill--proposed {
  color: var(--color-severity-medium);
}

.status-pill--embargoed {
  color: var(--color-severity-critical);
}

.status-pill--placeholder {
  color: var(--color-text-tertiary);
}

/* ---- Home page specifics ---- */

.home-intro {
  padding: var(--space-12) 0;
  border-bottom: 1px solid var(--color-border);
}

.home-intro__headline {
  font-size: var(--text-3xl);
  line-height: var(--leading-snug);
  max-width: 22ch;
  margin-bottom: var(--space-6);
}

.home-intro__body {
  font-size: var(--text-lg);
  color: var(--color-text-secondary);
  max-width: 54ch;
  line-height: var(--leading-snug);
  font-style: italic;
  margin-bottom: var(--space-5);
}

.home-intro__spec-link {
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
}

.home-intro__spec-link a {
  color: var(--color-accent);
}

/* ---- Embargoed / placeholder notices ---- */

.notice {
  border-left: 3px solid var(--color-border-strong);
  padding: var(--space-3) var(--space-5);
  margin: var(--space-5) 0;
  background: var(--color-bg-alt);
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  font-style: italic;
}

.notice--warning {
  border-left-color: var(--color-severity-medium);
}

/* ---- Trademark policy specifics ---- */

.permitted-use-table td:first-child,
.permitted-use-table th:first-child {
  width: 50%;
}

/* ---- Mobile responsive adjustments ---- */

@media (max-width: 48rem) {
  .impl-table {
    display: block;
    overflow-x: auto;
    max-width: 100%;
    -webkit-overflow-scrolling: touch;
  }

  .code-block pre {
    overflow-x: auto;
    max-width: 100%;
    -webkit-overflow-scrolling: touch;
  }
}