/* Mesopotamia shared styles. Lapis, gold, clay, parchment. */
:root {
  --lapis: #1d3461;
  --lapis-deep: #0f1d3a;
  --lapis-soft: #e6ebf5;
  --gold: #c9a227;
  --gold-soft: #f3e6b8;
  --clay: #a8552a;
  --clay-soft: #f2dccd;
  --parchment: #f6efe0;
  --paper: #fffaf0;
  --ink: #2a2118;
  --ink-soft: #5b4d3d;
  --line: #ddcfb3;
  /* society colours, used on timeline, map and charts */
  --sumer: #a8552a;
  --akkad: #2f7a6b;
  --assyria: #1d3461;
  --babylon: #7a3b69;
  --radius: 10px;
  --shadow: 0 2px 10px rgba(42, 33, 24, .08);
  --max: 1240px;
  --serif: "Cormorant Garamond", Georgia, serif;
  --sans: "Nunito Sans", system-ui, sans-serif;
  --cun: "Noto Sans Cuneiform", serif;
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--parchment);
  color: var(--ink);
  font: 18px/1.65 var(--sans);
  -webkit-font-smoothing: antialiased;
}
img, svg { max-width: 100%; height: auto; display: block; }
a { color: var(--lapis); text-underline-offset: 3px; }
a:hover { color: var(--clay); }
:focus-visible { outline: 3px solid var(--gold); outline-offset: 2px; }

h1, h2, h3 { font-family: var(--serif); line-height: 1.15; color: var(--lapis-deep); margin: 1.6em 0 .5em; }
h1 { font-size: clamp(2.4rem, 6vw, 3.8rem); font-weight: 700; margin-top: 0; }
h2 { font-size: clamp(1.7rem, 4vw, 2.3rem); font-weight: 700; }
h3 { font-size: 1.4rem; font-weight: 700; }
p { margin: 0 0 1em; }
.cun { font-family: var(--cun); font-weight: 400; }
.sr-only { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }

/* ---------- header / nav (injected by site.js) ---------- */
.site-header {
  background: var(--lapis-deep);
  color: var(--parchment);
  border-bottom: 3px solid var(--gold);
  position: sticky; top: 0; z-index: 50;
}
.site-header .bar { max-width: var(--max); margin: 0 auto; padding: .6rem 16px; display: flex; align-items: center; gap: 1rem; }
.brand { display: flex; align-items: baseline; gap: .5rem; color: var(--parchment); text-decoration: none; font-family: var(--serif); font-size: 1.6rem; font-weight: 700; }
.brand .cun { color: var(--gold); font-size: 1.1rem; }
.brand:hover { color: var(--gold-soft); }
.sound-toggle { margin-left: auto; }
.nav-toggle { margin-left: .5rem; background: none; border: 1px solid rgba(246,239,224,.4); color: var(--parchment); border-radius: 6px; padding: .35rem .7rem; font: inherit; font-size: .9rem; cursor: pointer; }
.site-nav { display: none; }
.site-nav.open { display: block; position: absolute; left: 0; right: 0; top: 100%; max-height: calc(100vh - 64px); max-height: calc(100dvh - 64px); overflow-y: auto; background: var(--lapis-deep); border-bottom: 3px solid var(--gold); padding: .5rem 16px 1rem; }
.site-nav ul { list-style: none; margin: 0; padding: 0; }
/* Societies group: on mobile a labelled, indented sub-list; on desktop a dropdown */
.group-btn { display: none; }
.group-label { display: block; padding: .45rem .6rem .2rem; font-size: .75rem; font-weight: 800; letter-spacing: .12em; text-transform: uppercase; color: var(--gold); }
.site-nav .subnav { margin: 0 0 .3rem .9rem; padding-left: .5rem; border-left: 1px solid rgba(201,162,39,.4); }
.site-nav a { display: block; color: var(--parchment); text-decoration: none; padding: .45rem .6rem; border-radius: 6px; font-size: .95rem; }
.site-nav a:hover { background: rgba(201,162,39,.15); color: var(--gold-soft); }
.site-nav a[aria-current="page"] { color: var(--gold); font-weight: 700; }
@media (min-width: 1200px) {
  .nav-toggle { display: none; }
  .site-nav { display: block; margin-left: auto; }
  .site-nav > ul { display: flex; align-items: center; gap: 0; white-space: nowrap; }
  .site-nav a, .group-btn { padding: .35rem .6rem; font-size: .92rem; }
  .sound-toggle { margin-left: .75rem; }
  .group-label { display: none; }
  .nav-group { position: relative; }
  .group-btn { display: block; background: none; border: 0; color: var(--parchment); font-family: inherit; line-height: inherit; border-radius: 6px; cursor: pointer; }
  .group-btn::after { content: ""; display: inline-block; width: .38em; height: .38em; margin: 0 0 .2em .45em; border-right: 1.5px solid currentColor; border-bottom: 1.5px solid currentColor; transform: rotate(45deg); transition: transform .15s; }
  .group-btn:hover { background: rgba(201,162,39,.15); color: var(--gold-soft); }
  .group-btn[aria-current="true"] { color: var(--gold); font-weight: 700; }
  .nav-group.open .group-btn::after { transform: translateY(.15em) rotate(-135deg); }
  .site-nav .subnav { display: none; position: absolute; top: calc(100% + .45rem); left: 0; min-width: 12rem; margin: 0; padding: .45rem; border: 1px solid var(--gold); border-radius: 4px; background: var(--lapis-deep); box-shadow: 0 10px 24px rgba(0,0,0,.35), inset 0 0 0 3px var(--lapis-deep), inset 0 0 0 4px rgba(201,162,39,.35); }
  .nav-group.open .subnav { display: block; }
  .subnav a { padding: .5rem .75rem; }
}

/* ---------- page layout ---------- */
.page { max-width: var(--max); margin: 0 auto; padding: 2.5rem 16px 4rem; }
.narrow { max-width: 760px; }
.page-head { margin-bottom: 2rem; }
.kicker { font-size: .8rem; letter-spacing: .14em; text-transform: uppercase; color: var(--clay); font-weight: 800; margin: 0 0 .4rem; }
.lede { font-size: 1.25rem; color: var(--ink-soft); max-width: 62rem; }

/* the short version */
.simple {
  background: var(--paper);
  border: 1px solid var(--line);
  border-left: 6px solid var(--gold);
  border-radius: var(--radius);
  padding: 1.4rem 1.6rem;
  box-shadow: var(--shadow);
  max-width: 64rem;
  margin: 0 0 2.5rem;
}
.simple > h2:first-child { margin-top: 0; font-size: 1.5rem; }
.simple > h2:first-child::before { content: "𒀭 "; font-family: var(--cun); color: var(--gold); font-size: 1.1rem; }

/* dig deeper */
details.dig {
  margin: 3rem 0 0;
  background: var(--lapis-soft);
  border: 1px solid #c8d2e6;
  border-radius: var(--radius);
  padding: 0 1.4rem;
}
details.dig > summary {
  cursor: pointer;
  list-style: none;
  padding: 1rem 0;
  font-family: var(--serif);
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--lapis-deep);
}
details.dig > summary::-webkit-details-marker { display: none; }
details.dig > summary::before { content: "⛏ "; }
details.dig > summary::after { content: "Ages 14+ · tap to open"; font-family: var(--sans); font-size: .8rem; font-weight: 600; color: var(--ink-soft); margin-left: .6rem; }
details.dig[open] > summary::after { content: "tap to close"; }
details.dig[open] { padding-bottom: 1.2rem; }

/* cards */
.grid { display: grid; gap: 1.2rem; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); }
.card {
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 1.2rem 1.3rem;
  box-shadow: var(--shadow);
}
.card h3 { margin-top: 0; }
.card .icon { font-family: var(--cun); font-size: 1.8rem; color: var(--clay); line-height: 1; margin-bottom: .4rem; }
a.card { display: block; text-decoration: none; color: inherit; transition: transform .15s, box-shadow .15s; }
a.card:hover { transform: translateY(-2px); box-shadow: 0 6px 18px rgba(42,33,24,.14); color: inherit; }

/* figures */
figure { margin: 1.5rem 0; }
figure img { border-radius: var(--radius); border: 1px solid var(--line); background: #e9dfc9; width: 100%; object-fit: cover; }
figcaption { font-size: .85rem; color: var(--ink-soft); margin-top: .5rem; }
figcaption .credit { display: block; font-size: .75rem; opacity: .8; }

/* museum plate: navy matte, double gold hairline, photo on a warm backdrop */
figure.plate {
  position: relative;
  background: #0c2340;
  padding: 2.4rem 2.4rem 2rem;
  margin: 2rem 0;
  border-radius: 2px;
  box-shadow: 0 10px 28px rgba(12, 35, 64, .28);
}
figure.plate::before {
  content: ""; position: absolute; inset: 10px; pointer-events: none;
  border: 1px solid rgba(201, 162, 39, .6);
  outline: 1px solid rgba(201, 162, 39, .25); outline-offset: 3px;
}
figure.plate img {
  position: relative;
  width: 100%; max-height: 520px; object-fit: contain;
  padding: 1.25rem; background: #e8e3da;
  border: 0; border-radius: 0;
}
figure.plate > svg { position: relative; padding: 1.25rem; }
figure.plate figcaption { position: relative; margin-top: 1.3rem; color: #e9e1cf; font-size: .92rem; line-height: 1.55; }
figure.plate .plate-title { display: block; margin-bottom: .35rem; color: #d9b84e; font: 800 .78rem/1.3 var(--sans); letter-spacing: .12em; text-transform: uppercase; }
figure.plate .credit { margin-top: .55rem; color: #a9b3c7; opacity: 1; text-decoration: underline; text-decoration-color: rgba(169, 179, 199, .45); text-underline-offset: 3px; }
figure.plate a { color: var(--gold-soft); }
@media (max-width: 600px) {
  figure.plate { padding: 1.2rem 1.1rem; margin: 1.5rem 0; }
  figure.plate::before { inset: 6px; outline-offset: 2px; }
  figure.plate img { padding: .6rem; max-height: 420px; }
  figure.plate figcaption { margin-top: 1rem; font-size: .88rem; }
}

/* small date or step label, e.g. "Neo-Assyrian · 911 to 609 BCE" */
.when { margin: 0 0 .35rem; font-size: .78rem; font-weight: 800; letter-spacing: .1em; text-transform: uppercase; color: var(--clay); }
.when::after { content: ""; display: block; width: 2.2rem; height: 1px; margin-top: .35rem; background: var(--gold); }

/* stepped list of phases: numbered cards in order, each capped with a gold rule */
.phases { display: grid; gap: 1.4rem 1rem; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); margin: 1.4rem 0 2rem; counter-reset: phase; }
.phases > * { position: relative; counter-increment: phase; border-top: 4px solid var(--gold); }
.phases > *::before { content: counter(phase, upper-roman); position: absolute; top: -.9rem; right: 1rem; min-width: 1.8rem; padding: 0 .4rem; background: var(--lapis-deep); color: var(--gold-soft); border: 1px solid var(--gold); border-radius: 2px; font: 700 .9rem/1.5rem var(--serif); text-align: center; }

/* split: text + figure */
.split { display: grid; gap: 2rem; align-items: start; }
@media (min-width: 800px) { .split { grid-template-columns: 1.2fr 1fr; } }

/* fact callouts */
.fact { display: flex; gap: .9rem; align-items: flex-start; background: var(--gold-soft); border-radius: var(--radius); padding: 1rem 1.2rem; margin: 1.5rem 0; }
.fact strong.big { font-family: var(--serif); font-size: 2.2rem; line-height: 1; color: var(--clay); flex-shrink: 0; }
.note { font-size: .85rem; color: var(--ink-soft); font-style: italic; }

/* source analysis card (curriculum skill) */
.source-card { background: var(--paper); border: 1px dashed var(--clay); border-radius: var(--radius); padding: 1.2rem 1.4rem; margin: 2rem 0; }
.source-card h3 { margin-top: 0; }
.source-card h3::before { content: "Source detective · "; font-family: var(--sans); font-size: .75rem; letter-spacing: .1em; text-transform: uppercase; color: var(--clay); display: block; }
.source-card dl { display: grid; grid-template-columns: max-content 1fr; gap: .3rem 1rem; margin: 0; }
.source-card dt { font-weight: 800; }
.source-card dd { margin: 0; }

/* museum label text: no box, letter-spaced serif caps in the society colour, a small lozenge and a hairline beneath */
.tag {
  display: inline-block;
  padding: 0 0 .05rem; border-bottom: 1px solid currentColor;
  font: 700 .82rem/1.3 var(--serif); text-transform: uppercase; letter-spacing: .16em;
  white-space: nowrap; color: var(--ink);
}
.tag::before { content: ""; display: inline-block; width: .42em; height: .42em; margin: 0 .5em .12em 0; background: currentColor; transform: rotate(45deg); }
.tag.sumer { color: var(--sumer); } .tag.akkad { color: var(--akkad); } .tag.assyria { color: var(--assyria); } .tag.babylon { color: var(--babylon); }
.card > .tag:first-child { margin-bottom: .5rem; }

/* motion: gentle rise-in as sections scroll into view (only when JS adds .reveal-on) */
.reveal-on .reveal { opacity: 0; transform: translateY(14px); transition: opacity .7s ease, transform .7s ease; }
.reveal-on .reveal.in { opacity: 1; transform: none; }
@keyframes drift { from { transform: translateX(0); } to { transform: translateX(-6rem); } }
.hero::after { animation: drift 40s ease-in-out infinite alternate; }

/* sound toggle in the header */
.sound-toggle { background: none; border: 1px solid rgba(201,162,39,.5); color: var(--gold-soft); border-radius: 3px; min-width: 44px; min-height: 36px; padding: .2rem .55rem; font: 600 .8rem var(--sans); letter-spacing: .06em; cursor: pointer; }
.sound-toggle[aria-pressed="true"] { background: rgba(201,162,39,.18); color: var(--gold); }
.sound-toggle:hover { border-color: var(--gold); }

/* buttons */
/* buttons: squared museum plaques with a gilt edge and an inner hairline */
.btn {
  position: relative; display: inline-block;
  padding: .7rem 1.5rem; min-height: 44px;
  background: linear-gradient(180deg, #26457d, var(--lapis));
  color: var(--parchment);
  border: 1px solid var(--gold); border-radius: 3px;
  box-shadow: 0 2px 6px rgba(15,29,58,.25);
  font: 700 1.12rem/1.3 var(--serif); font-variant-numeric: lining-nums; letter-spacing: .03em;
  text-decoration: none; cursor: pointer;
  transition: box-shadow .15s, color .15s;
}
.btn::after { content: ""; position: absolute; inset: 3px; border: 1px solid rgba(201,162,39,.45); border-radius: 1px; pointer-events: none; }
.btn:hover { background: linear-gradient(180deg, #2d5191, #22407a); color: #fff; box-shadow: 0 4px 12px rgba(15,29,58,.3); }
.btn:focus-visible { outline: 3px solid var(--gold); outline-offset: 3px; box-shadow: 0 0 0 7px var(--lapis-deep); }
.btn.gold { background: linear-gradient(180deg, #e4c766, var(--gold) 55%, #b48e1f); color: var(--lapis-deep); border-color: #8a6d14; }
.btn.gold::after { border-color: rgba(255,250,240,.55); }
.btn.gold:hover { background: linear-gradient(180deg, #ecd58a, #d4b03a 55%, #bf9926); color: var(--lapis-deep); }
.btn.ghost { background: transparent; color: var(--lapis); border-color: var(--lapis); box-shadow: none; }
.btn.ghost::after { border-color: rgba(201,162,39,.6); }
.btn.ghost:hover { background: rgba(29,52,97,.06); color: var(--lapis-deep); }

/* shared filter chips (map). button.chip outranks page-level .chip rules. */
button.chip { font: 700 .95rem/1.2 var(--serif); font-variant-numeric: lining-nums; letter-spacing: .03em; padding: .45rem .9rem; min-height: 44px; border-radius: 3px; border: 1px solid var(--line); background: var(--paper); color: var(--ink); box-shadow: inset 0 0 0 2px var(--paper), inset 0 0 0 3px rgba(201,162,39,.3); cursor: pointer; }
button.chip:hover { border-color: var(--gold); }
button.chip[aria-pressed="true"] { background: var(--lapis); border-color: var(--gold); color: var(--parchment); box-shadow: inset 0 0 0 2px var(--lapis), inset 0 0 0 3px rgba(243,230,184,.45); }
button.chip .dot { box-shadow: 0 0 0 1px rgba(255,250,240,.7); }

input[type="text"] { font: inherit; padding: .65rem .9rem; border: 2px solid var(--line); border-radius: 8px; background: #fff; color: var(--ink); }
input[type="text"]:focus { border-color: var(--gold); outline: none; }

.next-link { margin-top: 3rem; padding-top: 1.5rem; border-top: 1px solid var(--line); text-align: right; }
.next-link a { font-family: var(--serif); font-size: 1.4rem; font-weight: 700; text-decoration: none; }
.next-link a::after { content: " →"; }

/* ---------- home hero ---------- */
.hero { background: radial-gradient(ellipse at 70% 0%, #2a4a85 0%, var(--lapis-deep) 65%); color: var(--parchment); padding: 4rem 16px 4.5rem; position: relative; overflow: hidden; }
.hero::after { content: "𒀭 𒆠 𒂗 𒆤 𒅗 𒈗 𒌷 𒁾 𒂍 𒉌"; font-family: var(--cun); position: absolute; right: -2rem; bottom: -1.5rem; font-size: 5rem; color: rgba(201,162,39,.09); white-space: nowrap; pointer-events: none; }
.hero .inner { max-width: var(--max); margin: 0 auto; position: relative; z-index: 1; }
.hero h1 { color: var(--parchment); max-width: 22ch; }
.hero h1 em { color: var(--gold); font-style: normal; }
.hero .lede { color: #d9dfec; }
.hero .actions { display: flex; flex-wrap: wrap; gap: .8rem; margin-top: 1.8rem; }
.hero .btn.ghost { color: var(--parchment); border-color: rgba(246,239,224,.6); }
.hero .btn.ghost:hover { background: rgba(246,239,224,.1); color: var(--gold-soft); }

/* ---------- footer ---------- */
.site-footer { background: var(--lapis-deep); color: #c6cde0; font-size: .85rem; padding: 2rem 16px; border-top: 3px solid var(--gold); }
.site-footer .inner { max-width: var(--max); margin: 0 auto; display: flex; flex-wrap: wrap; gap: .5rem 2rem; justify-content: space-between; }
.site-footer a { color: var(--gold-soft); }
.site-footer .maker { flex-basis: 100%; margin: .4rem 0 0; padding-top: .8rem; border-top: 1px solid rgba(201,162,39,.25); font: italic 1rem var(--serif); color: #b5bed3; }

@media print {
  .site-header, .site-footer, .nav-toggle, .sound-toggle, .no-print { display: none !important; }
  .reveal { opacity: 1 !important; transform: none !important; }
  body { background: #fff; }
  figure.plate { background: none; padding: 0; box-shadow: none; }
  figure.plate::before { display: none; }
  figure.plate figcaption, figure.plate .plate-title, figure.plate .credit { color: var(--ink); }
  .btn, .tag { box-shadow: none; }
}
@media (prefers-reduced-motion: reduce) { * { transition: none !important; animation: none !important; scroll-behavior: auto !important; } }