/* ==========================================================================
   andresaldaz.com — shared identity for /blog (register + papers)
   Loaded AFTER each page's inline <style>, so it re-maps the legacy tokens
   (--black, --ink, --mid …) and restyles the chrome without touching content.
   Ivory paper, bottle green, antique brass; Cormorant / EB Garamond.
   ========================================================================== */

:root {
  color-scheme: light dark;
  /* identity tokens */
  --paper:      #f5f0e3;
  --paper-2:    #ede5d2;
  --paper-3:    #fbf8f0;
  --ink-0:      #1c1f17;
  --ink-2:      #34372c;
  --muted:      #4b4a3e;   /* ≥7:1 on paper (2026-10-14 legibility pass) */
  --rule-c:     #d3c7aa;
  --rule-soft:  #e2d9c3;
  --olive:      #556b2f;
  --olive-ink:  #3f5122;
  --forest:     #1e2916;
  --forest-2:   #172012;
  --brass:      #a8875a;
  --brass-hi:   #c9a96e;
  --brass-ink:  #664c24;
  --on-forest:  #ece4cf;
  --on-forest-2:#d2cab0;
  --plate:      #f8f4ea;
  --serif-d: 'Cormorant Garamond', 'Cormorant', Garamond, 'Times New Roman', serif;
  --serif-sc: 'Cormorant SC', 'Cormorant Garamond', Garamond, serif;
  --serif-b: 'EB Garamond', Garamond, Georgia, serif;
  --gutter: clamp(1rem, 4.5vw, 4.5rem);
  --measure: 1180px;

  /* legacy tokens used inside every paper, re-mapped */
  --black:     #172012;
  --ink:       var(--ink-0);
  --charcoal:  var(--ink-2);
  --mid:       var(--ink-2);
  --dim:       var(--muted);
  --rule:      var(--rule-c);
  --light:     var(--rule-soft);
  --off-white: var(--paper-2);
  --white:     var(--paper);
}
@media (prefers-color-scheme: dark) {
  :root {
    --paper:      #10150d;
    --paper-2:    #141b10;
    --paper-3:    #182014;
    --ink-0:      #ece4cf;
    --ink-2:      #d2cab2;
    --muted:      #bdb8a1;
    --rule-c:     #4a4430;
    --rule-soft:  #2c2c1f;
    --olive:      #9fb071;
    --olive-ink:  #b3c287;
    --forest:     #0b0f09;
    --forest-2:   #080b06;
    --brass:      #b8975f;
    --brass-hi:   #d2b47a;
    --brass-ink:  #c9a96e;
    --black:      #0a0e08;
  }
}

/* ─── Base ─────────────────────────────────────────────────────────────── */
html { -webkit-text-size-adjust: 100%; }
body {
  background: var(--paper);
  color: var(--ink-0);
  font-family: var(--serif-b);
  font-size: 19px;
  line-height: 1.7;
  font-variant-numeric: oldstyle-nums proportional-nums;
  -webkit-font-smoothing: antialiased;
}
body::before { display: none !important; }
::selection { background: var(--brass-hi); color: #1c1f17; }
:focus-visible { outline: 1px solid var(--brass); outline-offset: 4px; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto !important; } *, *::before, *::after { animation: none !important; transition: none !important; } }
p, li, dd { text-wrap: pretty; }
h1, h2, h3 { text-wrap: balance; }
.wrap { max-width: var(--measure); margin: 0 auto; padding: 0 var(--gutter); }
.sc-label, .sc {
  font-family: var(--serif-sc); font-weight: 600; letter-spacing: .15em; text-transform: lowercase;
  font-variant-numeric: lining-nums;
}

/* Guilloché wave band */
.band-guilloche {
  height: 14px;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='28' height='14' viewBox='0 0 28 14'%3E%3Cg fill='none' stroke='%23a8875a' stroke-width='.6'%3E%3Cpath d='M0 7 Q7 0 14 7 T28 7'/%3E%3Cpath d='M0 7 Q7 14 14 7 T28 7'/%3E%3Cpath d='M0 3.5 Q7 10.5 14 3.5 T28 3.5' opacity='.6'/%3E%3Cpath d='M0 10.5 Q7 3.5 14 10.5 T28 10.5' opacity='.6'/%3E%3C/g%3E%3C/svg%3E");
  background-repeat: repeat-x; background-position: center; opacity: .7;
}
.seal-bg { fill: var(--seal-fill, var(--paper)); }

/* ─── Masthead ─────────────────────────────────────────────────────────── */
#progress { position: fixed; top: 0; left: 0; height: 2px; background: var(--brass) !important; z-index: 100; }
.masthead { position: sticky; top: 0; z-index: 60; background: var(--paper); border-bottom: 1px solid var(--rule-c); }
.masthead nav {
  position: static; inset: auto; z-index: auto;
  max-width: var(--measure); margin: 0 auto; padding: 0 var(--gutter);
  height: 60px; display: flex; align-items: center; justify-content: space-between; gap: 1rem;
  background: none; backdrop-filter: none; -webkit-backdrop-filter: none; border: 0; box-shadow: none;
}
.brand { display: inline-flex; align-items: center; gap: .7rem; text-decoration: none; color: var(--ink-0); }
.brand-mark { width: 34px; height: 34px; color: var(--olive); flex: none; }
.brand-name { font-family: var(--serif-sc); font-weight: 600; font-size: 1.02rem; letter-spacing: .14em; white-space: nowrap; }
.masthead .nav-links { display: flex; gap: clamp(1rem, 2.4vw, 2.4rem); list-style: none; align-items: center; margin: 0; padding: 0; }
.masthead .nav-links a {
  font-family: var(--serif-sc); font-weight: 600; font-size: .92rem; letter-spacing: .14em; text-transform: lowercase;
  text-decoration: none; color: var(--muted); padding: .3rem 0; border-bottom: 1px solid transparent; transition: color .2s, border-color .2s;
}
.masthead .nav-links a::after { display: none; }
.masthead .nav-links a:hover, .masthead .nav-links a.active, .masthead .nav-links a[aria-current] { color: var(--ink-0); border-bottom-color: var(--brass); }
.masthead .nav-links .short { display: none; }
@media (max-width: 760px) {
  .masthead .nav-links { display: flex; }
  .masthead .nav-links .opt { display: none; }
  .masthead .nav-links .long { display: none; }
  .masthead .nav-links .short { display: inline; }
  .brand-name { font-size: .95rem; }
}
@media (max-width: 520px) {
  .brand-mark { width: 30px; height: 30px; }
  .masthead .nav-links { gap: 1rem; }
  .masthead .nav-links a { font-size: .86rem; letter-spacing: .1em; }
}
@media (max-width: 360px) { .brand-name { display: none; } }

/* ─── Colophon ─────────────────────────────────────────────────────────── */
footer.colophon {
  display: block; position: relative; background: var(--forest-2); color: var(--on-forest-2);
  padding: 3rem 0 2.4rem; text-align: left;
}
footer.colophon .band-guilloche { position: absolute; top: 0; left: 0; right: 0; opacity: .45; }
.colophon-inner { display: grid; grid-template-columns: auto 1fr auto; gap: 2rem; align-items: center; }
.colophon-mark { width: 56px; height: 56px; color: var(--brass-hi); display: block; --seal-fill: var(--forest-2); }
.colophon-mark svg { width: 100%; height: 100%; display: block; }
footer.colophon .footer-copy {
  font-family: var(--serif-b); font-size: .95rem; line-height: 1.6; letter-spacing: 0; text-transform: none; color: var(--on-forest-2);
}
footer.colophon .footer-copy strong { font-family: var(--serif-sc); font-weight: 600; letter-spacing: .14em; color: var(--on-forest); font-size: 1rem; display: block; }
footer.colophon .footer-copy small { display: block; font-size: .86rem; font-style: italic; opacity: .85; margin-top: .25rem; }
footer.colophon .footer-links { display: flex; gap: 1.6rem; flex-wrap: wrap; justify-content: flex-end; align-items: baseline; }
footer.colophon .footer-links a, footer.colophon #cc-manage-link {
  font-family: var(--serif-sc); font-weight: 600; font-size: .86rem; letter-spacing: .14em; text-transform: lowercase;
  color: var(--on-forest-2); text-decoration: none;
}
footer.colophon .footer-links a:hover, footer.colophon #cc-manage-link:hover { color: var(--brass-hi); }
@media (max-width: 760px) {
  .colophon-inner { grid-template-columns: 1fr; text-align: center; justify-items: center; gap: 1.2rem; }
  footer.colophon .footer-links { justify-content: center; }
}

/* ─── Paper: title page ────────────────────────────────────────────────── */
.article-hero {
  background: var(--paper); padding: clamp(3rem, 7vw, 5.5rem) var(--gutter) clamp(2.6rem, 5vw, 3.8rem);
  position: relative; overflow: hidden; border-bottom: 1px solid var(--rule-c);
}
.article-hero::after {
  content: ''; position: absolute; left: 0; right: 0; bottom: 10px; height: 14px; opacity: .55;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='28' height='14' viewBox='0 0 28 14'%3E%3Cg fill='none' stroke='%23a8875a' stroke-width='.6'%3E%3Cpath d='M0 7 Q7 0 14 7 T28 7'/%3E%3Cpath d='M0 7 Q7 14 14 7 T28 7'/%3E%3C/g%3E%3C/svg%3E");
  background-repeat: repeat-x;
}
.article-hero-inner { max-width: 820px; margin: 0 auto; position: relative; z-index: 1; }
.article-eyebrow {
  font-family: var(--serif-sc); font-weight: 600; font-size: .82rem; letter-spacing: .15em; text-transform: lowercase;
  color: var(--olive-ink); gap: .4rem 1.2rem; margin-bottom: 1.6rem; padding-bottom: 1rem; border-bottom: 1px solid var(--rule-soft);
}
.article-eyebrow { gap: .35rem .8rem; }
.article-eyebrow .eyebrow-tag { border: 0; padding: 0; color: var(--brass-ink); }
.article-eyebrow > * + *::before { content: '·'; color: var(--brass); margin-right: .8rem; }
.article-title {
  font-family: var(--serif-d); font-weight: 400; font-size: clamp(2.2rem, 5vw, 3.7rem); line-height: 1.08;
  color: var(--ink-0); letter-spacing: .003em; margin-bottom: 1.3rem;
}
.article-subtitle { font-family: var(--serif-d); font-style: italic; font-size: clamp(1.2rem, 2vw, 1.45rem); line-height: 1.45; color: var(--ink-2); max-width: 680px; }
.article-meta {
  margin-top: 2.2rem; padding-top: 1rem; gap: 1rem 3rem;
  border-top: 1px solid var(--ink-0); position: relative;
}
.article-meta::before { content: ''; position: absolute; left: 0; right: 0; top: 3px; height: 1px; background: var(--ink-0); opacity: .35; }
.meta-item { font-family: var(--serif-b); font-size: 1.02rem; letter-spacing: 0; text-transform: none; }
.meta-label { font-family: var(--serif-sc); font-weight: 600; font-size: .78rem; letter-spacing: .15em; text-transform: lowercase; color: var(--olive-ink); margin-bottom: .1rem; }
.meta-value { color: var(--ink-0); font-family: var(--serif-d); font-size: 1.2rem; }
.hero-deco {
  color: transparent; -webkit-text-stroke: 1px var(--brass); opacity: .22;
  font-family: var(--serif-d); font-style: normal; font-weight: 300; right: 2vw; bottom: -.18em;
}

/* ─── Paper: body ──────────────────────────────────────────────────────── */
.article-body { max-width: 760px; padding: clamp(2.6rem, 6vw, 4.5rem) 1.5rem 5rem; }
.article-body h2 { font-family: var(--serif-d); font-weight: 500; font-size: clamp(1.75rem, 3vw, 2.1rem); color: var(--ink-0); margin: 3.2rem 0 1rem; line-height: 1.18; }
.article-body h2::before { content: ''; display: block; width: 36px; height: 1px; background: var(--brass); margin-bottom: 1.1rem; }
.article-body h3 { font-family: var(--serif-d); font-weight: 500; font-size: 1.45rem; color: var(--ink-0); }
.article-body p { color: var(--ink-2); hyphens: auto; }
.article-body p strong, .article-body li strong { color: var(--ink-0); font-weight: 500; }
.article-body a:not(.nav-back) { color: var(--olive-ink); text-decoration-color: var(--brass); text-underline-offset: 3px; }
.article-body ul, .article-body ol { color: var(--ink-2); }
.article-body .lead { font-size: 1.2rem; color: var(--ink-0); }
.article-body .lead::first-letter {
  float: left; font-family: var(--serif-d); font-size: 4.2rem; line-height: .8; padding: .3rem .55rem 0 0; color: var(--olive);
}
.nav-back {
  font-family: var(--serif-sc); font-weight: 600; font-size: .86rem; letter-spacing: .14em; text-transform: lowercase;
  color: var(--muted); border-bottom: 1px solid var(--brass); padding-bottom: .15rem;
}
.nav-back:hover { color: var(--ink-0); }
.section-divider { width: 100%; height: 14px; background: none; margin: 3rem 0; position: relative; }
.section-divider::before { content: ''; position: absolute; left: 0; right: 0; top: 6px; height: 1px; background: var(--rule-c); }
.section-divider::after { content: ''; position: absolute; left: 50%; top: 2px; width: 8px; height: 8px; margin-left: -4px; transform: rotate(45deg); background: var(--paper); border: 1px solid var(--brass); }

.pullquote { border-left: 0; background: transparent; padding: 1.8rem 0; margin: 3rem 0; border-top: 1px solid var(--brass); border-bottom: 1px solid var(--brass); text-align: center; }
.pullquote p { font-family: var(--serif-d); font-style: italic; font-size: clamp(1.4rem, 2.6vw, 1.75rem); color: var(--ink-0); }

.code-block { background: var(--black); border: 1px solid var(--rule-c); box-shadow: inset 0 0 0 4px var(--black), inset 0 0 0 5px rgba(201,169,110,.25); padding: 2.1rem 1.8rem 1.8rem; }
.code-block-label { font-family: var(--serif-sc); font-weight: 600; font-size: .74rem; letter-spacing: .14em; text-transform: lowercase; color: rgba(214,184,128,.92); top: .7rem; right: 1.1rem; }

.formula-block { background: var(--paper-3); border: 1px solid var(--rule-c); box-shadow: inset 0 0 0 4px var(--paper-3), inset 0 0 0 5px var(--rule-soft); }
.formula-label, .chart-title, .data-table th, .notation-table th, .toc::before, .def-box::before {
  font-family: var(--serif-sc) !important; font-weight: 600; letter-spacing: .14em !important; text-transform: lowercase !important;
}
.formula-label { font-size: .8rem; color: var(--olive-ink); }
.formula { color: var(--ink-0); }
.chart-title { font-size: .86rem; color: var(--olive-ink); }
.chart-desc { color: var(--muted); }
.chart-wrap { background: var(--plate); border: 1px solid var(--rule-c); box-shadow: inset 0 0 0 4px var(--plate), inset 0 0 0 5px #e2d9c3; }
.data-table, .notation-table { font-variant-numeric: oldstyle-nums tabular-nums; }
.data-table { border-top: 1px solid var(--ink-0); }
.data-table th, .notation-table th { font-size: .78rem; color: var(--olive-ink); }
.data-table td, .notation-table td { color: var(--ink-2); border-bottom-color: var(--rule-soft); }
.toc { background: var(--paper-3); border-color: var(--rule-c); }
.toc::before { font-size: .78rem; color: var(--olive-ink); background: var(--paper); }
.toc li { font-family: var(--serif-b) !important; font-size: 1rem !important; letter-spacing: 0 !important; text-transform: none !important; }
.toc a:hover { color: var(--olive-ink); }
.def-box { background: var(--paper-3); border-color: var(--brass); }
.def-box::before { font-size: .78rem; color: var(--brass-ink); background: var(--paper); }
.field-tag { background: var(--paper-2); color: var(--ink-0); border: 1px solid var(--rule-soft); }

/* Exhibits keep a paper plate in dark mode: the charts are drawn in ink. */
@media (prefers-color-scheme: dark) {
  .chart-wrap { --plate: #f3eee0; border-color: #4a4430; box-shadow: inset 0 0 0 4px #f3eee0, inset 0 0 0 5px #d3c7aa; }
  .def-box::before, .toc::before { background: var(--paper); }
  .code-block { border-color: #2c2c1f; }
}

@media (max-width: 900px) {
  .pullquote { margin: 2.4rem 0; }
  .hero-deco { display: none; }
}
@media (max-width: 600px) {
  body { font-size: 18px; }
  .article-body { padding-left: 1rem; padding-right: 1rem; }
  .code-block { padding: 2.2rem 1rem 1.2rem; }
  .chart-wrap { padding: 1rem .6rem; }
  .formula-block { padding: 1.3rem 1rem; overflow-x: auto; }
  .data-table, .notation-table { display: block; overflow-x: auto; -webkit-overflow-scrolling: touch; }
  .data-table th, .data-table td, .notation-table th, .notation-table td { padding-left: .6rem; padding-right: .6rem; }
}

/* ─── Language switcher (generated chrome, see www-src/) ───────────────── */
.nav-right { display: flex; align-items: center; gap: clamp(1rem, 2vw, 1.8rem); }
.lang-switch { display: flex; list-style: none; align-items: baseline; margin: 0; padding: 0; }
.lang-switch li + li::before { content: '·'; color: var(--brass); padding: 0 .38rem; }
.lang-switch a {
  font-family: var(--serif-sc); font-weight: 600; font-size: .8rem; letter-spacing: .12em;
  text-decoration: none; color: var(--muted); border-bottom: 1px solid transparent; padding-bottom: .1rem;
}
.lang-switch a:hover { color: var(--ink-0); }
.lang-switch a[aria-current] { color: var(--ink-0); border-bottom-color: var(--brass); }
.masthead .lang-switch { padding-left: clamp(1rem, 2vw, 1.8rem); border-left: 1px solid var(--rule-c); }
.lang-row { display: none; border-bottom: 1px solid var(--rule-soft); padding: .45rem var(--gutter); background: var(--paper); }
.lang-row .lang-switch { justify-content: center; }
.colophon-langs { margin-top: 1.6rem; padding-top: 1.2rem; border-top: 1px solid rgba(201,169,110,.22); display: flex; justify-content: center; }
footer.colophon .lang-switch a { color: var(--on-forest-2); }
footer.colophon .lang-switch a[aria-current], footer.colophon .lang-switch a:hover { color: var(--brass-hi); border-bottom-color: var(--brass-hi); }
.lang-mark { font-family: var(--serif-b); font-style: italic; font-weight: 400; font-size: .82em; color: var(--muted); white-space: nowrap; }
.lang-note {
  font-family: var(--serif-b); font-style: italic; font-size: 1rem; color: var(--muted);
  margin: 0 0 1.2rem; padding: .5rem .9rem; border-left: 2px solid var(--brass); background: var(--paper-2);
}
@media (max-width: 900px) {
  .masthead .lang-switch { display: none; }
  .lang-row { display: block; }
}