/* Hallmark · macrostructure: Stat-Led · genre: editorial/financial ledger · tone: austere, data-forward
   theme: custom-from-brand (Wallgold ink + gold, warm paper) · studied: no
   Shared by gold-price-history-mock.html and gold-price-history-hub-mock.html.
   Series colours validated with the dataviz script on BOTH surfaces (light and dark):
   gold #a97c00 and coin #2a78d6, so colour follows the entity everywhere, hero band included. */
:root{
  --paper:#f6f3ec;--paper-2:#efeadf;--rule:#d8d2c3;--rule-2:#e6e1d4;
  --ink:#0e1319;--ink-2:#171d26;--ink-3:#2a3340;--text:#1c232c;--muted:#5b6471;
  --on-ink:#fff;--on-ink-2:#b9c2ce;--on-ink-rule:rgba(255,255,255,.16);
  --gold:#b99c49;--gold-2:#d9bd6a;--gold-dark:#7d641e;
  --up:#1a7a42;--down:#c0392b;--up-on-ink:#6fe09b;--down-on-ink:#ff8f82;
  --s-gold:#a97c00;--s-coin:#2a78d6;
  --r:8px;--wrap:1040px;--sticky:56px}
*{box-sizing:border-box}
html,body{overflow-x:clip}
html{-webkit-text-size-adjust:100%;scroll-padding-top:calc(var(--sticky) + 12px)}
@media (prefers-reduced-motion:no-preference){html{scroll-behavior:smooth}a,button,summary{transition:background-color .15s,color .15s,border-color .15s,opacity .15s}}
body{margin:0;background:var(--paper);color:var(--text);font:400 1rem/1.95 'Vazirmatn','IRANSansX',Tahoma,sans-serif}
a{color:var(--gold-dark);text-underline-offset:3px}
:focus-visible{outline:3px solid var(--gold);outline-offset:2px;border-radius:4px}
.wrap{max-width:var(--wrap);margin-inline:auto;padding-inline:16px}
h1,h2,h3{color:var(--ink);line-height:1.45;margin:0;overflow-wrap:anywhere;min-width:0}
h1{font-size:clamp(1.7rem,4.8vw,2.6rem);font-weight:800}
h2{font-size:clamp(1.25rem,3vw,1.6rem);font-weight:800;margin-bottom:6px}
h3{font-size:1.05rem;font-weight:700}
p{margin:0 0 10px}
bdi{unicode-bidi:isolate}
.up{color:var(--up)}.dn{color:var(--down)}.muted{color:var(--muted)}
.sr{position:absolute;width:1px;height:1px;overflow:hidden;clip-path:inset(50%);white-space:nowrap}
.skip{position:absolute;inset-inline-start:12px;top:-80px;background:var(--ink);color:#fff;padding:8px 16px;border-radius:var(--r);z-index:100;text-decoration:none}
.skip:focus{top:8px}
svg.ico{width:.7em;height:.7em;fill:currentColor;flex:none}

/* mock banner + site header (same ink as the hero, so the page opens as one band) */
.sample{background:#fff4d6;color:#4d3a00;border-bottom:1px solid #ecd48a;font-size:.875rem;line-height:1.7}
.sample .wrap{display:flex;gap:12px;align-items:center;justify-content:space-between;flex-wrap:wrap;padding-block:8px}
.sample button{font:inherit;font-weight:700;border:1px solid #b99c49;background:#fff;color:#5b4300;border-radius:var(--r);padding:4px 14px;cursor:pointer;min-height:36px}
.sample button[aria-pressed="true"]{background:var(--ink);color:#f0d98a;border-color:var(--ink)}
.top{background:var(--ink);color:#fff;border-bottom:1px solid var(--on-ink-rule)}
.top .wrap{display:flex;align-items:center;justify-content:space-between;gap:16px;padding-block:12px}
.brand{font-weight:800;font-size:1.25rem;color:var(--gold-2);text-decoration:none}
.top nav{display:flex;gap:18px;font-size:.9375rem;flex-wrap:wrap}
.top nav a{color:var(--on-ink-2);text-decoration:none}
.top nav a:hover{color:#fff}

/* hero band: the number is the page */
.hero-band{background:var(--ink);color:var(--on-ink);padding-block:18px 40px}
.hero-band h1{color:var(--on-ink)}
.hero-band .crumbs{color:var(--on-ink-2);padding:0 0 22px;font-size:.875rem}
.hero-band .crumbs a{color:var(--on-ink-2)}
.crumbs{font-size:.875rem;color:var(--muted);padding-block:14px 0}
.crumbs a{color:var(--muted)}
.crumbs span[aria-hidden]{margin-inline:6px}
.hero-band .lead{color:var(--on-ink-2);font-size:1rem;max-width:66ch;margin:18px 0 6px}
.hero-band .dataline{color:var(--on-ink-2);font-size:.875rem;margin:14px 0 0}
.hero-band .note{background:var(--ink-2)}

/* ledger of two stats (year page) */
.ledger{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:0;margin-top:26px;container-type:inline-size;border-top:1px solid var(--on-ink-rule)}
.stat{padding:20px 0 4px;min-width:0}
.stat+.stat{border-inline-start:1px solid var(--on-ink-rule);padding-inline-start:28px}
.stat:first-child{padding-inline-end:28px}
@media (max-width:700px){.ledger{grid-template-columns:minmax(0,1fr)}.stat+.stat{border-inline-start:0;border-top:1px solid var(--on-ink-rule);padding-inline-start:0;margin-top:18px}.stat:first-child{padding-inline-end:0}}
.stat header{display:flex;align-items:center;gap:8px;flex-wrap:wrap;color:var(--on-ink)}
.stat header b{display:flex;align-items:center;gap:8px;font-size:1.05rem}
.stat header i{width:10px;height:10px;border-radius:50%;flex:none}
.stat header small{color:var(--on-ink-2);font-size:.8125rem}
.fig{font-size:clamp(2.1rem,6.4cqi,3.6rem);font-weight:800;color:var(--on-ink);line-height:1.2;margin-top:8px}
.figrow{display:flex;align-items:center;gap:12px;flex-wrap:wrap;margin-top:2px}
.figrow small{color:var(--on-ink-2);font-size:.8125rem}
.stat .from{font-size:.875rem;color:var(--on-ink-2);margin:6px 0 4px}
.spark{height:60px;margin:6px 0 8px}
.spark svg{display:block;width:100%;height:100%}
.mini{display:grid;grid-template-columns:repeat(auto-fit,minmax(120px,1fr));gap:8px 18px;margin:8px 0 0;padding:0}
.mini div{border-top:1px solid var(--on-ink-rule);padding-top:6px}
.mini dt{font-size:.8125rem;color:var(--on-ink-2)}
.mini dd{margin:0;font-weight:700;color:var(--on-ink);font-size:.9375rem}
.mini .u{color:var(--on-ink-2)}

/* hub hero: giant multiple + its words, then records */
.bigfig{display:flex;align-items:baseline;gap:14px;flex-wrap:wrap;margin-top:22px}
.bigfig strong{font-size:clamp(3.4rem,15vw,7.2rem);font-weight:800;line-height:1.05;color:var(--on-ink)}
.bigfig span{font-size:clamp(1.1rem,3vw,1.5rem);font-weight:700;color:var(--gold-2);max-width:36ch;line-height:1.5}

/* change pill */
.chg{display:inline-flex;align-items:center;gap:5px;border-radius:6px;padding:0 9px;font-weight:700;font-size:.875rem;line-height:1.8;white-space:nowrap}
.chg.up{background:#e1f1e8;color:var(--up)}
.chg.dn{background:#f8e3e0;color:var(--down)}
.chg.dn svg.ico{transform:rotate(180deg)}
.hero-band .chg.up{background:rgba(46,160,90,.2);color:var(--up-on-ink)}
.hero-band .chg.dn{background:rgba(231,76,60,.2);color:var(--down-on-ink)}

/* year navigation (inside the hero) */
.yearnav{display:flex;gap:8px;align-items:stretch;flex-wrap:wrap;margin-top:22px}
.yearnav a,.yearnav span.off{display:inline-flex;align-items:center;gap:8px;min-height:48px;padding:0 14px;border:1px solid var(--on-ink-rule);border-radius:var(--r);color:var(--on-ink);text-decoration:none;line-height:1.3}
.yearnav a:hover{border-color:var(--gold-2);color:var(--gold-2)}
.yearnav small{display:block;font-size:.8125rem;color:var(--on-ink-2)}
.yearnav b{font-weight:800}
.yearnav span.off{color:#7d8794;border-style:dashed;cursor:not-allowed}
.yearnav select{font:inherit;font-weight:700;border:1px solid var(--on-ink-rule);border-radius:var(--r);padding:0 12px;background:var(--ink-2);color:var(--on-ink);min-height:48px}
.yearnav svg{width:14px;height:14px;fill:none;stroke:currentColor;stroke-width:2.2;stroke-linecap:round;stroke-linejoin:round}

/* sticky section nav, under the hero */
.subnav{position:sticky;top:0;z-index:30;height:var(--sticky);background:var(--paper);border-bottom:1px solid var(--rule)}
.subnav .wrap{display:flex;gap:2px;overflow-x:auto;scrollbar-width:none;height:100%}
.subnav .wrap::-webkit-scrollbar{display:none}
.subnav a{flex:none;padding:0 14px;display:inline-flex;align-items:center;color:var(--muted);text-decoration:none;font-weight:500;font-size:.9375rem;border-bottom:3px solid transparent}
.subnav a:hover{color:var(--ink)}
.subnav a[aria-current="true"]{color:var(--ink);font-weight:700;border-bottom-color:var(--gold)}

/* body: flat ruled sections on paper (no cards, no shadows) */
.sec{padding-block:38px 34px;border-top:1px solid var(--rule)}
.sec:first-child{border-top:0}
.sec>p:first-of-type{max-width:72ch}
.grid2{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:0 44px;border-top:1px solid var(--rule)}
.grid2>.sec{border-top:0;min-width:0}
@media(max-width:900px){.grid2{grid-template-columns:minmax(0,1fr);gap:0}.grid2>.sec+.sec{border-top:1px solid var(--rule)}}
.fine{font-size:.875rem;color:var(--muted);margin:8px 0 0}

/* controls */
.toolbar{display:flex;flex-wrap:wrap;gap:10px 14px;align-items:center;margin:14px 0 4px}
.seg{display:inline-flex;border:1px solid var(--rule);border-radius:var(--r);background:#fff;overflow:hidden;flex-wrap:wrap}
.seg a,.seg button{font:inherit;border:0;background:transparent;cursor:pointer;padding:0 16px;min-height:44px;text-decoration:none;color:var(--ink-3);font-weight:500;display:inline-flex;align-items:center;white-space:nowrap}
.seg>*+*{border-inline-start:1px solid var(--rule)}
.seg [aria-pressed="true"],.seg [aria-current="true"]{background:var(--ink);color:#f0d98a;font-weight:700}
.seg .dot{width:9px;height:9px;border-radius:50%;margin-inline-end:8px;flex:none}
@media(pointer:coarse){.seg a,.seg button,.sortbtn{min-height:44px}}
.badge{display:inline-block;font-size:.75rem;font-weight:700;color:var(--gold-dark);border:1px solid var(--rule);border-radius:4px;padding:0 8px;line-height:1.7;background:#fff}

/* stat tiles on paper (hub chart window) */
.facts{display:grid;grid-template-columns:repeat(auto-fit,minmax(138px,1fr));gap:14px 22px;margin-top:18px}
.fact{border-top:2px solid var(--ink);padding-top:8px;min-width:0}
.fact b{display:block;font-size:.8125rem;color:var(--muted);font-weight:500}
.fact strong{display:block;font-size:1.15rem;color:var(--ink);font-weight:800;line-height:1.6;margin-top:2px}
.fact strong small{font-size:.75rem;font-weight:500;color:var(--muted)}
.fact i{display:block;font-style:normal;font-size:.8125rem;color:var(--muted);line-height:1.5}

/* charts */
.chartwrap{position:relative;margin-top:12px;transition:opacity .15s}
.chartwrap.busy{opacity:.55}
.chartwrap svg{display:block;width:100%;height:auto;direction:ltr;touch-action:pan-y;border-radius:4px}
.chartwrap svg:focus-visible{outline:3px solid var(--gold);outline-offset:3px}
.tip{position:absolute;pointer-events:none;background:var(--ink);color:#fff;border-radius:var(--r);padding:6px 12px;line-height:1.5;white-space:nowrap;transform:translate(-50%,-115%);z-index:5}
.tip[hidden]{display:none}
.tip.below{transform:translate(-50%,14px)}
.tip b{display:block;font-size:1rem;font-weight:800}
.tip b small{font-weight:400;color:var(--on-ink-2);font-size:.8125rem}
.tip span{display:block;font-size:.8125rem;color:var(--on-ink-2)}
.tip i.lk{display:inline-block;width:14px;height:3px;border-radius:2px;margin-inline-end:6px;vertical-align:middle}
.legend{display:flex;gap:14px 18px;font-size:.8125rem;color:var(--muted);flex-wrap:wrap;margin-top:8px;align-items:center}
.legend i{display:inline-block;width:10px;height:10px;border-radius:50%;margin-inline-end:6px;vertical-align:middle}
.legend i.sq{border-radius:3px}

/* highest / lowest: typography, no tinted boxes */
.hlgrid{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:0 44px;margin-top:14px}
@media(max-width:700px){.hlgrid{grid-template-columns:minmax(0,1fr);gap:26px}}
.hlp>b{display:flex;align-items:center;gap:8px;padding-bottom:8px;border-bottom:2px solid var(--ink);margin-bottom:12px}
.hlp>b i{width:10px;height:10px;border-radius:50%}
.hlrow{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:0 18px}
.hlrow div+div{border-inline-start:1px solid var(--rule);padding-inline-start:18px}
.hlrow div>span{display:flex;align-items:center;gap:6px;font-size:.8125rem;font-weight:700}
.hlrow .hi>span{color:var(--up)}.hlrow .lo>span{color:var(--down)}
.hlrow .lo svg.ico{transform:rotate(180deg)}
.hlrow strong{display:block;font-size:clamp(1.25rem,3.4vw,1.7rem);font-weight:800;color:var(--ink);line-height:1.5}
.hlrow small{display:block;color:var(--muted);font-size:.8125rem;line-height:1.4}
.u{font-size:.8125rem;font-weight:400;color:var(--muted)}

/* tables: ledger, keyboard-scrollable region, container-query columns, heat bars */
.tw{overflow-x:auto;-webkit-overflow-scrolling:touch;container-type:inline-size;position:relative}
.tw:focus-visible{outline:3px solid var(--gold);outline-offset:2px}
.tbl{width:100%;border-collapse:separate;border-spacing:0;font-size:.9375rem;font-variant-numeric:tabular-nums;min-width:540px}
.tbl caption{caption-side:top;text-align:start;font-size:.875rem;color:var(--muted);padding-bottom:8px}
.tbl th,.tbl td{padding:10px 10px;border-bottom:1px solid var(--rule-2);text-align:center;white-space:nowrap}
.tbl th{font-size:.8125rem;font-weight:700;color:var(--ink);border-bottom:2px solid var(--ink);background:var(--paper)}
.tbl thead tr:first-child th{border-bottom:1px solid var(--rule)}
.tbl thead tr:first-child th[rowspan]{border-bottom:2px solid var(--ink)}
.tbl th:first-child,.tbl td:first-child{text-align:start;position:sticky;inset-inline-start:0;background:var(--paper);z-index:1}
.tbl tr.now td,.tbl tr.now td:first-child{background:var(--paper-2)}
.tbl tr.cur td{background:var(--paper-2);font-weight:700}
.tbl tbody tr:hover td{background:var(--paper-2)}
.tbl .sep{border-inline-start:1px solid var(--rule)}
.tbl a{font-weight:700}
.tag{display:inline-block;font-size:.75rem;font-weight:700;border-radius:4px;padding:0 6px;margin-inline-start:6px;line-height:1.6}
.tag.up{background:#e1f1e8;color:var(--up)}.tag.dn{background:#f8e3e0;color:var(--down)}
@container (max-width:400px){.tbl .opt2{display:none}}
.hb{position:relative;display:inline-block;min-width:96px;padding:1px 8px;text-align:start;font-weight:600;isolation:isolate}
.hb::before{content:"";position:absolute;inset-block:2px;inset-inline-start:0;width:var(--w,0%);background:var(--c);opacity:.16;border-radius:4px;z-index:-1}
.hb.up{--c:var(--up);color:var(--up)}.hb.dn{--c:var(--down);color:var(--down)}
@container (max-width:560px){.tbl{min-width:0;font-size:.875rem}.tbl th,.tbl td{padding:9px 6px}.tbl .opt{display:none}.hb{min-width:68px;padding:1px 4px}.tag{display:table;margin:2px 0 0}}
.sortbtn{font:inherit;font-weight:700;color:inherit;background:none;border:0;cursor:pointer;display:inline-flex;align-items:center;gap:4px;padding:6px 4px;min-height:44px}
.sortbtn::after{content:"";width:8px;height:8px;border-inline-end:2px solid #9aa0a8;border-block-end:2px solid #9aa0a8;transform:rotate(45deg) translateY(-2px);opacity:.7}
th[aria-sort="ascending"] .sortbtn::after{transform:rotate(-135deg) translateY(-2px);border-color:var(--gold-dark);opacity:1}
th[aria-sort="descending"] .sortbtn::after{border-color:var(--gold-dark);opacity:1}

/* years: a ruled index, not a wall of chips */
.years{display:grid;grid-template-columns:repeat(auto-fill,minmax(128px,1fr));gap:0 18px;margin-top:12px}
.years a,.years span.yr{display:block;border-top:1px solid var(--rule);padding:10px 2px 12px;text-decoration:none;color:var(--ink);line-height:1.6;font-weight:700}
.years a:hover{border-top-color:var(--ink);background:var(--paper-2)}
.years span.yr{color:var(--muted);font-weight:500}
.years small{display:block;font-size:.8125rem;font-weight:500}
.years a[aria-current="page"]{border-top:3px solid var(--gold)}

/* FAQ (native details: answers stay in the DOM and searchable) */
.qa{border-top:1px solid var(--rule)}
.qa:last-of-type{border-bottom:1px solid var(--rule)}
.qa summary{cursor:pointer;list-style:none;display:flex;justify-content:space-between;align-items:center;gap:12px;padding:12px 2px;min-height:52px}
.qa summary::-webkit-details-marker{display:none}
.qa summary h3{margin:0;font-size:1rem;font-weight:700}
.qa summary::after{content:"";flex:none;width:9px;height:9px;border-inline-end:2px solid var(--muted);border-block-end:2px solid var(--muted);transform:rotate(45deg) translateY(-2px)}
.qa[open] summary::after{transform:rotate(-135deg) translateY(-2px)}
.qa summary:hover h3{color:var(--gold-dark)}
.qa .ans{padding:0 2px 14px;color:var(--ink-3);max-width:72ch}
.qa .ans p{margin:0}

dl.meta{display:grid;grid-template-columns:max-content 1fr;gap:6px 18px;margin:10px 0 0;max-width:72ch}
dl.meta dt{font-weight:700;color:var(--ink-3)}
dl.meta dd{margin:0;color:var(--ink-3)}
@media(max-width:560px){dl.meta{grid-template-columns:1fr}dl.meta dd{margin-bottom:8px}}
.todo{display:inline-block;border:1px dashed var(--gold-dark);color:var(--gold-dark);border-radius:4px;padding:0 8px;font-size:.8125rem;font-weight:700}

/* closing band: bookends the hero; the one place the gold CTA appears */
.end-band{background:var(--ink);color:var(--on-ink);padding-block:34px;margin-top:20px}
.end-band .row{display:flex;gap:20px;flex-wrap:wrap;align-items:center;justify-content:space-between}
.end-band .prices{display:flex;gap:34px;flex-wrap:wrap}
.end-band b{display:block;color:var(--on-ink-2);font-weight:500;font-size:.875rem}
.end-band strong{font-size:clamp(1.35rem,3.6vw,1.9rem);color:var(--on-ink);font-weight:800}
.end-band small{color:var(--on-ink-2);display:block}
.btn{display:inline-flex;align-items:center;justify-content:center;min-height:48px;padding:0 24px;border-radius:var(--r);background:var(--gold-2);color:var(--ink);font-weight:800;text-decoration:none}
.btn:hover{background:#e6cb7c}
.end-band a.sec2{color:var(--on-ink-2);font-size:.9375rem}
.end-band .note{background:var(--ink-2);margin-top:14px}
footer{padding:22px 0 40px;color:var(--muted);font-size:.875rem}

/* SEO notes layer (English, only when toggled) */
.note,.notes-only{display:none}
body.show-notes .note{display:block;direction:ltr;text-align:left;font:500 12.5px/1.55 ui-monospace,Menlo,Consolas,monospace;background:var(--ink);color:#d9e2ee;border-inline-start:4px solid var(--gold);border-radius:var(--r);padding:8px 12px;margin:0 0 12px;unicode-bidi:plaintext}
body.show-notes .note b{color:#f0d98a}
body.show-notes .note [dir=rtl]{unicode-bidi:isolate;font-family:'Vazirmatn',Tahoma,sans-serif}
body.show-notes .notes-only{display:block}
.spec{background:var(--ink);color:#d9e2ee;border-radius:var(--r);padding:20px;margin-block:14px;direction:ltr;text-align:left;font:400 13.5px/1.7 ui-monospace,Menlo,Consolas,monospace}
.spec h2{color:#f0d98a;font:700 16px/1.4 ui-monospace,Menlo,monospace;margin:14px 0 4px}
.spec h2:first-child{margin-top:0}
.spec ul{margin:4px 0 0;padding-inline-start:20px}
.spec li{margin-bottom:3px}
.spec pre{white-space:pre-wrap;word-break:break-word;background:#171d26;border-radius:var(--r);padding:10px;margin:6px 0;font-size:12px}
.spec [dir=rtl]{unicode-bidi:isolate;font-family:'Vazirmatn',Tahoma,sans-serif}
.spec input{font:inherit;width:90px;background:#171d26;color:#f0d98a;border:1px solid #3a4658;border-radius:6px;padding:2px 8px}
.spec button{font:inherit;background:#f0d98a;color:var(--ink);border:0;border-radius:6px;padding:2px 12px;cursor:pointer}