/* ==========================================================================
   Bergamasco Persian Heritage — editorial research publication styles
   System-font strategy; no webfonts, no frameworks.
   ========================================================================== */

:root {
  --paper: #faf6ef;
  --paper-deep: #f3ecdd;
  --card: #fffdf8;
  --ink: #26221b;
  --ink-soft: #4a443a;
  --muted: #6f675a;
  --accent: #1a5f6e;        /* deep Persian turquoise */
  --accent-dark: #124450;
  --accent-warm: #b0592f;   /* restrained terracotta */
  --rule: #e2d9c6;
  --rule-strong: #cfc3a9;
  --serif: "Iowan Old Style", "Palatino Linotype", Palatino, "Book Antiqua", Georgia, "Times New Roman", serif;
  --sans: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --maxw: 46rem;
}

* { box-sizing: border-box; }

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

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--serif);
  font-size: 1.075rem;
  line-height: 1.72;
  font-variant-numeric: oldstyle-nums;
}

/* ---------- accessibility ---------- */
.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  background: var(--accent);
  color: #fff;
  padding: .6rem 1rem;
  z-index: 100;
}
.skip-link:focus { left: .5rem; top: .5rem; }

.visually-hidden {
  position: absolute !important;
  width: 1px; height: 1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
}

/* ---------- top bar ---------- */
.topbar {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(250, 246, 239, .94);
  backdrop-filter: blur(6px);
  border-bottom: 1px solid var(--rule);
}
.topbar-inner {
  max-width: 76rem;
  margin: 0 auto;
  padding: .65rem 1.25rem;
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 1rem;
}
.brand {
  font-family: var(--serif);
  font-weight: 700;
  font-size: 1.05rem;
  letter-spacing: .02em;
  color: var(--ink);
  text-decoration: none;
}
.brand-star { color: var(--accent-warm); font-size: .85em; }
.brand-sub {
  font-family: var(--sans);
  font-weight: 400;
  font-size: .72rem;
  text-transform: uppercase;
  letter-spacing: .22em;
  color: var(--muted);
}
.topnav { display: flex; gap: 1.15rem; }
.topnav a {
  font-family: var(--sans);
  font-size: .82rem;
  letter-spacing: .06em;
  text-transform: uppercase;
  color: var(--ink-soft);
  text-decoration: none;
  border-bottom: 2px solid transparent;
  padding-bottom: .1rem;
}
.topnav a:hover { color: var(--accent); border-bottom-color: var(--accent); }
.topnav a.nav-cta {
  background: var(--accent);
  color: #fff;
  padding: .4rem .85rem;
  border-radius: 3px;
  border-bottom: none;
  align-self: center;
}
.topnav a.nav-cta:hover { background: var(--accent-dark); color: #fff; }

/* ---------- hero ---------- */
.hero {
  border-bottom: 1px solid var(--rule);
  background:
    radial-gradient(ellipse 80% 60% at 50% -10%, rgba(26, 95, 110, .07), transparent),
    var(--paper);
  text-align: center;
  padding: 4.5rem 1.25rem 3.5rem;
}
.hero-inner { max-width: 52rem; margin: 0 auto; }
.kicker {
  font-family: var(--sans);
  font-size: .78rem;
  text-transform: uppercase;
  letter-spacing: .3em;
  color: var(--accent);
  margin: 0 0 1.6rem;
}
.kicker::before, .kicker::after {
  content: "—";
  color: var(--rule-strong);
  margin: 0 .8rem;
}
h1 {
  font-size: clamp(2.3rem, 6vw, 3.9rem);
  line-height: 1.08;
  font-weight: 700;
  letter-spacing: -.01em;
  margin: 0 0 1.4rem;
}
.h1-sep {
  display: block;
  width: 5.5rem;
  height: 1px;
  background: var(--accent-warm);
  margin: 1.2rem auto;
}
.h1-sub {
  display: block;
  font-size: .52em;
  font-weight: 400;
  font-style: italic;
  color: var(--accent-dark);
  letter-spacing: .01em;
}
.hero-lede {
  font-size: 1.18rem;
  line-height: 1.65;
  color: var(--ink-soft);
  max-width: 40rem;
  margin: 0 auto 2.4rem;
}
.hero-stats {
  display: flex;
  justify-content: center;
  gap: clamp(1.5rem, 5vw, 4rem);
  margin: 0 0 2.2rem;
}
.stat { display: flex; flex-direction: column; align-items: center; }
.stat-num {
  font-size: clamp(2.4rem, 5vw, 3.4rem);
  font-weight: 700;
  color: var(--accent);
  line-height: 1.1;
  font-variant-numeric: lining-nums;
}
.stat-label {
  font-family: var(--sans);
  font-size: .74rem;
  text-transform: uppercase;
  letter-spacing: .14em;
  color: var(--muted);
  margin-top: .35rem;
  max-width: 9rem;
}
.hero-note {
  font-family: var(--sans);
  font-size: .84rem;
  color: var(--muted);
  max-width: 38rem;
  margin: 0 auto;
  border-top: 1px solid var(--rule);
  padding-top: 1.2rem;
}
.hero-note a { color: var(--accent); }

/* ---------- layout with TOC ---------- */
.layout {
  max-width: 76rem;
  margin: 0 auto;
  padding: 0 1.25rem;
}
.article { max-width: var(--maxw); margin: 0 auto; }

.toc {
  font-family: var(--sans);
  margin: 2rem 0 0;
}
.toc-details summary {
  cursor: pointer;
  font-size: .8rem;
  text-transform: uppercase;
  letter-spacing: .2em;
  color: var(--accent-dark);
  font-weight: 600;
  padding: .4rem 0;
  list-style-position: inside;
}
.toc ol {
  list-style: none;
  margin: .6rem 0 0;
  padding: 0;
  border-left: 2px solid var(--rule);
}
.toc li a {
  display: block;
  padding: .32rem .9rem;
  font-size: .86rem;
  color: var(--ink-soft);
  text-decoration: none;
  border-left: 2px solid transparent;
  margin-left: -2px;
  line-height: 1.4;
}
.toc li a:hover { color: var(--accent); border-left-color: var(--accent-warm); }
.toc li a.active {
  color: var(--accent-dark);
  font-weight: 600;
  border-left-color: var(--accent);
}

@media (min-width: 1120px) {
  .layout {
    display: grid;
    grid-template-columns: 15.5rem minmax(0, 1fr);
    gap: 3.5rem;
    align-items: start;
  }
  .toc {
    position: sticky;
    top: 4.2rem;
    max-height: calc(100vh - 5.5rem);
    overflow-y: auto;
    padding: 1.5rem 0 2rem;
    margin: 0;
  }
  .toc-details summary { pointer-events: none; list-style: none; }
  .toc-details summary::-webkit-details-marker { display: none; }
  .article { margin: 0; }
}

/* ---------- article typography ---------- */
section { padding: 3rem 0 0; }
section[id] { scroll-margin-top: 4.5rem; }

h2 {
  font-size: clamp(1.55rem, 3.4vw, 2.05rem);
  line-height: 1.22;
  margin: 0 0 1.2rem;
  letter-spacing: -.005em;
}
h2::after {
  content: "";
  display: block;
  width: 3.2rem;
  height: 2px;
  background: var(--accent-warm);
  margin-top: .7rem;
}
h3 {
  font-size: 1.22rem;
  margin: 2.2rem 0 .8rem;
  line-height: 1.3;
}
p { margin: 0 0 1.1rem; }
a { color: var(--accent); text-underline-offset: .18em; }
a:hover { color: var(--accent-dark); }
cite { font-style: italic; }

.lede {
  font-size: 1.16rem;
  line-height: 1.7;
}
.lede::first-letter {
  initial-letter: 3;
  -webkit-initial-letter: 3;
  color: var(--accent);
  font-weight: 700;
  margin-right: .55rem;
}
@supports not (initial-letter: 3) {
  .lede::first-letter {
    float: left;
    font-size: 3.6em;
    line-height: .85;
    padding-right: .09em;
    color: var(--accent);
    font-weight: 700;
  }
}

.source-note {
  font-family: var(--sans);
  font-size: .86rem;
  color: var(--muted);
}

/* ---------- callouts ---------- */
.callout {
  background: var(--card);
  border: 1px solid var(--rule);
  border-left: 4px solid var(--accent);
  padding: 1.2rem 1.4rem;
  margin: 1.4rem 0;
  border-radius: 0 4px 4px 0;
}
.callout p:last-child { margin-bottom: 0; }
.callout-plain { border-left-color: var(--rule-strong); }
.callout-caution { border-left-color: var(--accent-warm); }

/* ---------- key quote ---------- */
.keyquote {
  margin: 2.2rem 0;
  padding: 2rem 2.2rem;
  background: var(--card);
  border-top: 3px double var(--accent);
  border-bottom: 3px double var(--accent);
  position: relative;
}
.keyquote::before {
  content: "✦";
  position: absolute;
  top: -0.85rem;
  left: 50%;
  transform: translateX(-50%);
  background: var(--card);
  color: var(--accent-warm);
  padding: 0 .7rem;
  font-size: .95rem;
}
.keyquote blockquote { margin: 0; }
.keyquote blockquote p {
  font-size: 1.14rem;
  line-height: 1.78;
  font-style: italic;
  color: var(--ink-soft);
  margin: 0;
}
.keyquote figcaption {
  margin-top: 1.2rem;
  font-family: var(--sans);
  font-size: .85rem;
  color: var(--muted);
  text-align: right;
}

/* ---------- glance grid ---------- */
.glance-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(15rem, 1fr));
  gap: 1rem;
  margin-top: 1.4rem;
}
.glance-card {
  background: var(--card);
  border: 1px solid var(--rule);
  border-radius: 5px;
  padding: 1.3rem 1.3rem 1.1rem;
}
.glance-num {
  display: block;
  font-size: 2.3rem;
  font-weight: 700;
  color: var(--accent);
  line-height: 1;
  font-variant-numeric: lining-nums;
}
.glance-card h3 {
  margin: .5rem 0 .4rem;
  font-size: 1.02rem;
  font-family: var(--sans);
  font-weight: 600;
  letter-spacing: .01em;
}
.glance-card p {
  font-family: var(--sans);
  font-size: .86rem;
  line-height: 1.55;
  color: var(--ink-soft);
  margin: 0;
}

/* ---------- lists ---------- */
.case-list, .corroboration { padding-left: 1.2rem; }
.case-list li, .corroboration li { margin-bottom: .85rem; }
.case-list li::marker, .corroboration li::marker { color: var(--accent-warm); }

.arg-list, .phase2-list { padding-left: 1.4rem; counter-reset: none; }
.arg-list li, .phase2-list li { margin-bottom: 1rem; }
.arg-list li::marker, .phase2-list li::marker {
  color: var(--accent);
  font-weight: 700;
  font-variant-numeric: lining-nums;
}
.phase2-close { font-style: italic; color: var(--accent-dark); }

/* ---------- tables ---------- */
.table-wrap {
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  margin: 1.2rem 0;
  border: 1px solid var(--rule);
  border-radius: 5px;
  background: var(--card);
}
table {
  border-collapse: collapse;
  width: 100%;
  font-family: var(--sans);
  font-size: .875rem;
  line-height: 1.55;
}
th, td {
  text-align: left;
  vertical-align: top;
  padding: .65rem .85rem;
  border-bottom: 1px solid var(--rule);
}
thead th {
  font-size: .74rem;
  text-transform: uppercase;
  letter-spacing: .1em;
  color: var(--accent-dark);
  background: var(--paper-deep);
  border-bottom: 2px solid var(--rule-strong);
  white-space: nowrap;
}
tbody tr:last-child td { border-bottom: none; }
tbody tr:nth-child(even) { background: rgba(226, 217, 198, .16); }
td.hl { background: rgba(26, 95, 110, .07); font-weight: 600; }

.src-table { min-width: 46rem; }
.src-table td:first-child {
  font-weight: 700;
  font-variant-numeric: lining-nums;
  white-space: nowrap;
}
.src-table td:first-child a { text-decoration: none; }
.src-table td[lang], .src-table td span[dir="rtl"] { font-size: .9rem; }
td span[dir="rtl"] { display: inline-block; }

.table-note {
  font-family: var(--sans);
  font-size: .82rem;
  color: var(--muted);
  margin-top: -.4rem;
}

/* ---------- methodology band ---------- */
.band {
  background: var(--paper-deep);
  border-top: 1px solid var(--rule-strong);
  border-bottom: 1px solid var(--rule-strong);
  margin: 3rem -1.25rem 0;
  padding: 2.6rem 1.25rem 2.4rem;
}
@media (min-width: 1120px) {
  .band {
    margin-left: 0;
    margin-right: 0;
    padding-left: 2rem;
    padding-right: 2rem;
    border: 1px solid var(--rule-strong);
    border-radius: 6px;
  }
}
.band h2::after { background: var(--accent); }
.band-intro { font-style: italic; color: var(--ink-soft); }
.band ul { padding-left: 1.2rem; }
.band li { margin-bottom: .7rem; }

/* ---------- timeline ---------- */
.timeline {
  list-style: none;
  margin: 1.6rem 0 0;
  padding: 0;
  border-left: 2px solid var(--rule-strong);
}
.timeline li {
  position: relative;
  padding: 0 0 1.8rem 1.6rem;
}
.timeline li::before {
  content: "";
  position: absolute;
  left: -6px;
  top: .45em;
  width: 10px;
  height: 10px;
  background: var(--accent);
  border-radius: 50%;
  border: 2px solid var(--paper);
}
.tl-date {
  display: block;
  font-family: var(--sans);
  font-size: .8rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: .12em;
  color: var(--accent-warm);
  margin-bottom: .25rem;
  font-variant-numeric: lining-nums;
}
.tl-body { color: var(--ink-soft); }

/* ---------- verdict ---------- */
.verdict-box {
  background: var(--card);
  border: 1px solid var(--rule-strong);
  border-radius: 6px;
  padding: 2rem 2.2rem;
  margin-top: 1.2rem;
  box-shadow: 0 1px 0 var(--rule);
}
.verdict-final {
  font-size: 1.35rem;
  font-style: italic;
  text-align: center;
  color: var(--accent-dark);
  margin: 1.4rem 0 0;
  padding-top: 1.2rem;
  border-top: 1px solid var(--rule);
}

/* ---------- follow ---------- */
.follow {
  text-align: center;
  border-top: 1px solid var(--rule);
  margin-top: 3rem;
  padding-top: 2.6rem;
}
.follow h2 { display: inline-block; }
.follow h2::after { margin-left: auto; margin-right: auto; }
.follow-note {
  font-family: var(--sans);
  font-size: .84rem;
  color: var(--muted);
  max-width: 34rem;
  margin: .4rem auto 1.1rem;
}

/* ---------- collaborate CTA ---------- */
.collaborate { margin-top: 3rem; }
.collab-box {
  background: var(--card);
  border: 1px solid var(--rule-strong);
  border-top: 3px double var(--accent);
  border-radius: 6px;
  padding: 2.2rem 2.2rem 1.8rem;
  text-align: center;
}
.collab-box h2 { display: inline-block; }
.collab-box h2::after { margin-left: auto; margin-right: auto; }
.collab-lede {
  max-width: 36rem;
  margin: 0 auto 1.8rem;
  color: var(--ink-soft);
}
.collab-options {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(16rem, 1fr));
  gap: 1.2rem;
  text-align: center;
  margin-bottom: 1.4rem;
}
.collab-option {
  background: var(--paper);
  border: 1px solid var(--rule);
  border-radius: 5px;
  padding: 1.4rem 1.3rem 1.2rem;
}
.collab-option h3 {
  margin: 0 0 .6rem;
  font-family: var(--sans);
  font-size: .82rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: .14em;
  color: var(--accent-dark);
}
.collab-option p {
  font-family: var(--sans);
  font-size: .88rem;
  line-height: 1.6;
  color: var(--ink-soft);
}
.btn {
  display: inline-block;
  font-family: var(--sans);
  font-size: .92rem;
  font-weight: 600;
  letter-spacing: .02em;
  text-decoration: none;
  padding: .7rem 1.5rem;
  border-radius: 4px;
  margin-top: .3rem;
  border: 1px solid transparent;
}
.btn:focus-visible { outline: 3px solid var(--accent-warm); outline-offset: 2px; }
.btn-primary { background: var(--accent); color: #fff; }
.btn-primary:hover { background: var(--accent-dark); color: #fff; }
.btn-secondary {
  background: transparent;
  color: var(--accent-dark);
  border-color: var(--accent);
}
.btn-secondary:hover { background: rgba(26, 95, 110, .08); color: var(--accent-dark); }
.collab-addr {
  margin: .7rem 0 0;
  font-size: .8rem !important;
}
.collab-addr a { color: var(--muted); text-decoration: none; }
.collab-addr a:hover { color: var(--accent); text-decoration: underline; }
.collab-broad {
  font-style: italic;
  color: var(--muted);
  font-size: .95rem;
  margin: 0;
  padding-top: .4rem;
  border-top: 1px solid var(--rule);
}

@media (max-width: 640px) {
  .collab-box { padding: 1.5rem 1.1rem 1.3rem; }
  .topnav a.nav-cta { padding: .3rem .6rem; }
  .topbar-inner { flex-wrap: wrap; row-gap: .3rem; }
  .topnav { flex-wrap: wrap; align-items: center; }
}

/* ---------- references ---------- */
.references { border-top: 1px solid var(--rule); margin-top: 3rem; padding-top: 2.6rem; }
.ref-list {
  font-family: var(--sans);
  font-size: .9rem;
  line-height: 1.65;
  padding-left: 1.4rem;
}
.ref-list li { margin-bottom: .45rem; }
.ref-numbered { list-style: decimal; }
.ref-numbered li::marker { color: var(--accent); font-weight: 700; }
.ref-list li:target {
  background: rgba(176, 89, 47, .12);
  outline: 2px solid rgba(176, 89, 47, .3);
  outline-offset: 3px;
  border-radius: 2px;
}
.no-url { color: var(--muted); font-style: italic; font-size: .84em; }

/* ---------- colophon ---------- */
.colophon {
  margin-top: 4rem;
  border-top: 1px solid var(--rule-strong);
  background: var(--paper-deep);
  text-align: center;
  padding: 2.6rem 1.25rem 3rem;
}
.colophon-inner {
  max-width: 40rem;
  margin: 0 auto;
  font-family: var(--sans);
  font-size: .88rem;
  color: var(--ink-soft);
}
.orn { color: var(--accent-warm); letter-spacing: .8em; margin-bottom: 1.4rem; }
.dedication { font-family: var(--serif); font-size: 1rem; color: var(--muted); }
.foot-links { margin-top: 1.4rem; }
.foot-links a { color: var(--accent); text-decoration: none; }
.foot-links a:hover { text-decoration: underline; }

/* ---------- 404 ---------- */
.notfound {
  min-height: 60vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 3rem 1.25rem;
}
.notfound h1 { font-size: clamp(2rem, 5vw, 3rem); }
.notfound p { color: var(--ink-soft); max-width: 32rem; }

/* ---------- small screens ---------- */
@media (max-width: 640px) {
  body { font-size: 1rem; }
  .hero { padding: 3rem 1rem 2.5rem; }
  .keyquote { padding: 1.4rem 1.2rem; }
  .verdict-box { padding: 1.4rem 1.2rem; }
  .topnav { gap: .8rem; }
  .topnav a { font-size: .74rem; }
}

/* ---------- reduced motion ---------- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
}

/* ---------- print ---------- */
@media print {
  .topbar, .toc, .skip-link { display: none; }
  body { background: #fff; color: #000; }
  a { color: #000; }
  .keyquote, .verdict-box, .glance-card, .table-wrap { border-color: #999; }
}