/* AURUM — negro de grafito, oro mate, fotos a color. Tema claro: piedra caliza luminosa. */
:root {
  --bg: #0B0B0C;
  --bg-2: #111113;
  --surface: #161618;
  --line: #2A2A2E;
  --text: #F4F2EE;
  --muted: #A9A59D;
  --gold: #C9A45C;
  --gold-ink: #C9A45C;
  --on-gold: #111;
  --green: #6FB596;
  --err: #F09A8A;
  --strata-1: #1A1A1D; --strata-2: #141416; --strata-3: #0B0B0C;
  --display: 'Marcellus', 'Times New Roman', serif;
  --body: 'Hanken Grotesk', system-ui, -apple-system, 'Segoe UI', sans-serif;
  --gap: clamp(1.25rem, 4vw, 3rem);
  color-scheme: dark;
}
@media (prefers-color-scheme: light) {
  :root:not([data-theme="dark"]) {
    --bg: #F7F5F0; --bg-2: #EFECE5; --surface: #FFFFFF; --line: #DEDAD1; --text: #1C1C1E; --muted: #5C5850;
    --gold: #B08A43; --gold-ink: #7E6026; --on-gold: #111; --green: #2E6B53; --err: #A3341F;
    --strata-1: #E9E5DC; --strata-2: #F0EDE6; --strata-3: #F7F5F0;
    color-scheme: light;
  }
}
:root[data-theme="light"] {
  --bg: #F7F5F0; --bg-2: #EFECE5; --surface: #FFFFFF; --line: #DEDAD1; --text: #1C1C1E; --muted: #5C5850;
  --gold: #B08A43; --gold-ink: #7E6026; --on-gold: #111; --green: #2E6B53; --err: #A3341F;
  --strata-1: #E9E5DC; --strata-2: #F0EDE6; --strata-3: #F7F5F0;
  color-scheme: light;
}
:lang(ar) {
  --display: 'Noto Kufi Arabic', 'Marcellus', sans-serif;
  --body: 'IBM Plex Sans Arabic', 'Hanken Grotesk', system-ui, sans-serif;
}

*, *::before, *::after { box-sizing: border-box; }
html { font-size: clamp(16px, 10px + .5vw, 28px); scroll-behavior: smooth; scroll-padding-top: 5rem; -webkit-text-size-adjust: 100%; }
body { margin: 0; background: var(--bg); color: var(--text); font: 400 1.0625rem/1.6 var(--body); transition: background-color .3s, color .3s; }
body:lang(ar) { line-height: 1.85; }
img, svg, video { display: block; max-width: 100%; }
img { height: auto; }
h1, h2, h3, p, ul, ol, dl, dd, figure { margin: 0; }
ul, ol { padding: 0; list-style: none; }
a { color: inherit; }
:focus-visible { outline: 2px solid var(--gold); outline-offset: 3px; }
.wrap { width: min(100% - 2 * var(--gap), 78rem); margin-inline: auto; }
.skip { position: absolute; inset-inline-start: 1rem; top: -4rem; z-index: 20; padding: .6rem 1rem; background: var(--gold); color: var(--on-gold); }
.skip:focus { top: 1rem; }

/* ---------- tipografía ---------- */
h2 { font: 400 clamp(1.875rem, 1.1rem + 2.6vw, 3.25rem)/1.1 var(--display); max-width: 22ch; text-wrap: balance; letter-spacing: -.005em; }
:lang(ar) h2 { font-weight: 500; font-size: clamp(1.5rem, 1rem + 2vw, 2.5rem); line-height: 1.5; }
h3 { font: 600 1.0625rem/1.4 var(--body); }
.statement { font-size: clamp(2rem, 1.1rem + 3.2vw, 3.75rem); max-width: 20ch; }
:lang(ar) .statement { font-size: clamp(1.625rem, 1rem + 2.4vw, 2.75rem); }
.h2--sub { margin-top: clamp(4rem, 8vw, 7rem); }
.lead { max-width: 60ch; margin-top: 1.25rem; font-size: 1.1875rem; color: var(--muted); }
.body { max-width: 60ch; margin-top: 1.25rem; color: var(--muted); }
.label { margin-top: clamp(3rem, 6vw, 5rem); font: 500 .9375rem/1.4 var(--body); color: var(--muted); }
.fn, figcaption { font-size: .8125rem; color: var(--muted); }
.fn { max-width: 80ch; margin-top: 1.5rem; }
.fn a, .credit a { text-underline-offset: .2em; }
.credit { display: block; margin-top: .25rem; opacity: .85; }

/* ---------- botones ---------- */
.btn { display: inline-flex; align-items: center; justify-content: center; min-height: 3rem; padding: .75rem 1.6rem; background: var(--gold); color: var(--on-gold); font: 600 1rem/1.2 var(--body); text-decoration: none; border: 0; cursor: pointer; transition: background-color .15s, transform .15s; }
.btn:hover { background: #D8B672; }
.btn:active { transform: translateY(1px); }
.btn--sm { min-height: 2.5rem; padding: .5rem 1rem; font-size: .9375rem; }
.tlink { text-underline-offset: .35em; text-decoration-thickness: 1px; padding-block: .75rem; }
.tlink:hover { text-decoration-thickness: 2px; }

/* ---------- cabecera ---------- */
.top { position: sticky; top: 0; z-index: 10; background: color-mix(in srgb, var(--bg) 88%, transparent); backdrop-filter: blur(12px); -webkit-backdrop-filter: blur(12px); border-bottom: 1px solid var(--line); }
.top__in { display: flex; align-items: center; gap: 1.5rem; min-height: 4rem; }
.brand { display: inline-flex; align-items: center; gap: .6rem; font: 400 1.25rem/1 'Marcellus', serif; letter-spacing: .16em; text-decoration: none; }
.brand__mark { width: 1.35rem; height: 1.35rem; color: var(--gold); }
.top__nav { display: none; gap: 1.75rem; margin-inline-start: auto; font-size: .9375rem; }
.top__nav a { text-decoration: none; color: var(--muted); padding-block: .5rem; }
.top__nav a:hover { color: var(--text); }
.top__tools { display: flex; align-items: center; gap: .5rem; margin-inline-start: auto; }
.langs { display: flex; font-size: .9375rem; }
.langs a { display: block; padding: .6rem .5rem; text-decoration: none; color: var(--muted); }
.langs a:hover { color: var(--text); }
.langs a[aria-current] { color: var(--text); box-shadow: inset 0 -2px var(--gold); }
.theme { display: grid; place-items: center; width: 2.75rem; height: 2.75rem; background: none; border: 1px solid var(--line); color: var(--text); cursor: pointer; }
.theme:hover { border-color: var(--muted); }
.theme[hidden] { display: none; }
.top__cta { display: none; }
@media (min-width: 68rem) {
  .top__nav { display: flex; }
  .top__tools { margin-inline-start: 0; }
  .top__cta { display: inline-flex; margin-inline-start: .5rem; }
}

/* ---------- hero ---------- */
.hero { --vein: 1; position: relative; display: grid; grid-template-rows: 1fr auto; min-height: calc(100svh - 4rem); background: #0B0B0C; color: #F4F2EE; overflow: hidden; }
.hero__media, .hero__video, .hero__shade { position: absolute; inset: 0; width: 100%; height: 100%; }
.hero__media img, .hero__video { width: 100%; height: 100%; object-fit: cover; }
.hero__video { opacity: 0; transition: opacity 1s; }
.hero__video.is-on { opacity: 1; }
.hero__shade { background: linear-gradient(90deg, rgba(11, 11, 12, .92) 0%, rgba(11, 11, 12, .7) 45%, rgba(11, 11, 12, .1) 100%), linear-gradient(0deg, rgba(11, 11, 12, .6), transparent 40%); }
[dir="rtl"] .hero__shade { transform: scaleX(-1); }
.hero__in { position: relative; align-self: end; padding-block: clamp(4rem, 12vh, 8rem) clamp(1.5rem, 4vh, 3rem); }
.hero h1 { font: 400 clamp(2.5rem, 1.2rem + 5.2vw, 6rem)/1.02 var(--display); max-width: 13ch; letter-spacing: -.01em; text-wrap: balance; }
.hero h1:lang(ar) { font-weight: 600; line-height: 1.4; font-size: clamp(2.125rem, 1.2rem + 3.8vw, 4.25rem); max-width: 16ch; }
.hero__lead { margin-top: 1.5rem; max-width: 50ch; font-size: 1.125rem; color: rgba(244, 242, 238, .78); }
.hero__act { display: flex; flex-wrap: wrap; align-items: center; gap: 1rem 1.75rem; margin-top: 2.25rem; }
.hero__pause { position: absolute; inset-inline-end: var(--gap); top: 1rem; z-index: 2; display: grid; place-items: center; width: 2.75rem; height: 2.75rem; background: rgba(11, 11, 12, .5); border: 1px solid rgba(244, 242, 238, .3); color: #F4F2EE; cursor: pointer; }
.hero__pause[hidden] { display: none; }
.hero__pause .i-play, .hero__pause.is-paused .i-pause { display: none; }
.hero__pause.is-paused .i-play { display: block; }
/* Tema claro: el hero se aclara. Velo de caliza y texto oscuro sobre el mismo video. */
@media (prefers-color-scheme: light) {
  :root:not([data-theme="dark"]) .hero { background: #F7F5F0; color: #1C1C1E; }
  :root:not([data-theme="dark"]) .hero__shade { background: linear-gradient(90deg, rgba(247, 245, 240, .96) 0%, rgba(247, 245, 240, .82) 42%, rgba(247, 245, 240, .15) 100%), linear-gradient(0deg, rgba(247, 245, 240, .7), transparent 40%); }
  :root:not([data-theme="dark"]) .hero__lead { color: #4A463F; }
}
:root[data-theme="light"] .hero { background: #F7F5F0; color: #1C1C1E; }
:root[data-theme="light"] .hero__shade { background: linear-gradient(90deg, rgba(247, 245, 240, .96) 0%, rgba(247, 245, 240, .82) 42%, rgba(247, 245, 240, .15) 100%), linear-gradient(0deg, rgba(247, 245, 240, .7), transparent 40%); }
:root[data-theme="light"] .hero__lead { color: #4A463F; }

/* Corte de roca con la veta que se descubre al hacer scroll */
.rock { position: relative; height: clamp(5.5rem, 16vh, 11rem); }
.rock svg { position: absolute; inset: 0; width: 100%; height: 100%; }
.rock .s1 { fill: var(--strata-1); } .rock .s2 { fill: var(--strata-2); } .rock .s3 { fill: var(--strata-3); }
.rock__vein { stroke: var(--gold); clip-path: inset(0 calc((1 - var(--vein)) * 100%) 0 0); }
[dir="rtl"] .rock { transform: scaleX(-1); }

/* ---------- secciones ---------- */
.sec { padding-block: clamp(4.5rem, 10vw, 9rem); }
.sec + .sec { border-top: 1px solid var(--line); }
.sec--chain, .sec--invest { background: var(--bg-2); }

.intro { display: grid; gap: 2rem clamp(2rem, 6vw, 6rem); align-items: end; }
.intro__p { max-width: 54ch; color: var(--muted); font-size: 1.125rem; }
@media (min-width: 62rem) { .intro { grid-template-columns: 7fr 5fr; } }

.figures { display: grid; gap: 0 var(--gap); margin-top: 1rem; }
.figures li { padding-block: 1.5rem; border-top: 1px solid var(--line); }
.figures strong { display: block; font: 400 clamp(2.5rem, 1.6rem + 2.6vw, 4rem)/1 'Marcellus', serif; color: var(--gold-ink); }
.figures p { margin-top: .75rem; font-size: .9375rem; color: var(--muted); max-width: 36ch; }
@media (min-width: 48rem) { .figures { grid-template-columns: repeat(3, 1fr); } }

/* Origen */
.origin { display: grid; gap: clamp(2rem, 5vw, 5rem); align-items: start; }
.origin__photo img { width: 100%; aspect-ratio: 4 / 5; object-fit: cover; }
.origin__photo figcaption { margin-top: .625rem; }
.origin__data { display: grid; gap: 1.5rem 2.5rem; margin-top: 2.5rem; align-items: start; }
@media (min-width: 62rem) {
  .origin { grid-template-columns: 5fr 7fr; }
  .origin__photo { position: sticky; top: 6rem; }
}
@media (min-width: 48rem) { .origin__data { grid-template-columns: 1fr 13rem; } }

.rows { border-bottom: 1px solid var(--line); }
.rows > div { display: grid; gap: .15rem 1.5rem; padding-block: .875rem; border-top: 1px solid var(--line); }
.rows dt { font-size: .875rem; color: var(--muted); padding-top: .15em; }
.rows dd { max-width: 60ch; }
@media (min-width: 40rem) { .rows > div { grid-template-columns: 11rem 1fr; } }

.map svg { width: 100%; max-width: 16rem; margin-inline: auto; direction: ltr; }
.map__land { fill: var(--surface); stroke: var(--line); stroke-width: .8; stroke-linejoin: round; }
.map__link { fill: none; stroke: var(--gold); stroke-width: .9; stroke-dasharray: 2.5 2.5; }
.map__dot { fill: var(--muted); }
.map__hq { fill: var(--gold); }
.map__src { fill: var(--green); }
.map__ring { fill: none; stroke: var(--green); stroke-width: .8; }
.map__t { fill: var(--text); font: 500 8.5px var(--body); }
.map__t--m { fill: var(--muted); font-weight: 400; }
.map figcaption { margin-top: .5rem; text-align: center; }

/* Metales: fotos a color con la ficha periódica encima */
.metals { display: grid; gap: 2.5rem var(--gap); margin-top: clamp(2.5rem, 5vw, 4rem); }
@media (min-width: 40rem) { .metals { grid-template-columns: repeat(2, 1fr); } }
@media (min-width: 62rem) { .metals { grid-template-columns: repeat(3, 1fr); } }
.metal figure { position: relative; }
.metal img { width: 100%; aspect-ratio: 4 / 5; object-fit: cover; transition: transform .6s cubic-bezier(.2, .7, .2, 1); }
.metal figure picture { display: block; overflow: hidden; }
.metal:hover img { transform: scale(1.03); }
.metal figcaption { margin-top: .5rem; }
.metal__tile { position: absolute; top: 1rem; inset-inline-start: 1rem; display: grid; grid-template-columns: auto auto; width: 5.25rem; padding: .4rem .5rem .5rem; background: rgba(11, 11, 12, .72); backdrop-filter: blur(6px); -webkit-backdrop-filter: blur(6px); border: 1px solid rgba(244, 242, 238, .25); color: #F4F2EE; font-size: .6875rem; font-variant-numeric: tabular-nums; }
.metal__tile span:last-child { text-align: end; }
.metal__tile b { grid-column: 1 / -1; grid-row: 2; font: 400 2.125rem/1.1 'Marcellus', serif; text-align: center; padding-block: .15rem; }
.metal__tile span:first-child { grid-row: 1; }
.metal__tile span:last-child { grid-row: 1; grid-column: 2; }
.metal--gold .metal__tile b { color: #E2C27D; }
.metal h3 { margin-top: 1.25rem; font: 400 1.625rem/1.2 var(--display); }
.metal p { margin-top: .5rem; color: var(--muted); max-width: 40ch; }

/* Cadena de custodia: el momento memorable */
.chain { display: grid; gap: 2.5rem clamp(2rem, 6vw, 6rem); margin-top: clamp(2.5rem, 5vw, 4rem); align-items: start; }
@media (min-width: 62rem) { .chain { grid-template-columns: 5fr 7fr; } }
.ticket { background: var(--surface); border: 1px solid var(--line); padding: 1.5rem; }
@media (min-width: 62rem) { .ticket { position: sticky; top: 6rem; } }
@media (max-width: 61.99rem) { .ticket { display: none; } }
.ticket__head { display: flex; justify-content: space-between; align-items: baseline; gap: 1rem; padding-bottom: 1rem; border-bottom: 1px solid var(--gold); font-weight: 600; }
.ticket__head code { font: 500 .875rem var(--body); color: var(--gold-ink); letter-spacing: .04em; }
.ticket__rows li { display: grid; grid-template-columns: 1fr auto; gap: .1rem 1rem; padding-block: .8rem; border-bottom: 1px solid var(--line); opacity: .38; transition: opacity .4s; }
.ticket__k { font-size: .8125rem; color: var(--muted); }
.ticket__v { grid-row: 2; font-size: .9375rem; }
.ticket__ok { grid-row: 1 / 3; grid-column: 2; align-self: center; width: 1.25rem; height: 1.25rem; color: var(--green); opacity: 0; transform: scale(.6); transition: opacity .3s, transform .3s; }
.ticket__rows li.is-done { opacity: 1; }
.ticket__rows li.is-done .ticket__ok { opacity: 1; transform: none; }
.ticket__note { margin-top: 1rem; font-size: .8125rem; color: var(--muted); }
.no-js-ticket .ticket__rows li, .ticket:not(.is-live) .ticket__rows li { opacity: 1; }
.ticket:not(.is-live) .ticket__ok { opacity: 1; transform: none; }

.stations { position: relative; }
.station { position: relative; padding-inline-start: 4rem; padding-bottom: clamp(2.5rem, 8vh, 5rem); }
.station::before { content: ''; position: absolute; inset-inline-start: 1.25rem; top: 2.75rem; bottom: .5rem; width: 1px; background: var(--line); }
.station:last-child { padding-bottom: 0; }
.station:last-child::before { display: none; }
.station__n { position: absolute; inset-inline-start: 0; top: 0; display: grid; place-items: center; width: 2.5rem; height: 2.5rem; border: 1px solid var(--gold); color: var(--gold-ink); font: 400 1.125rem/1 'Marcellus', serif; background: var(--bg-2); }
.station h3 { padding-top: .35rem; font: 400 clamp(1.5rem, 1.1rem + 1vw, 2rem)/1.2 var(--display); }
.station p { margin-top: .75rem; max-width: 52ch; color: var(--muted); }
.station .station__doc { display: inline-flex; align-items: center; gap: .5rem; margin-top: 1rem; padding: .35rem .75rem; border: 1px solid var(--line); font-size: .875rem; color: var(--text); }
.station .station__doc::before { content: ''; width: .5rem; height: .5rem; background: var(--gold); }

/* Normas */
.rules { display: grid; gap: 0 var(--gap); margin-top: clamp(2.5rem, 5vw, 4rem); }
@media (min-width: 40rem) { .rules { grid-template-columns: repeat(2, 1fr); } }
@media (min-width: 68rem) { .rules { grid-template-columns: repeat(4, 1fr); } }
.rules li { padding-block: 1.5rem; border-top: 1px solid var(--line); }
.rules strong { display: block; font: 400 2rem/1 'Marcellus', var(--display); color: var(--gold-ink); }
.rules h3 { margin-top: 1rem; }
.rules p { margin-top: .5rem; font-size: .9375rem; color: var(--muted); }
.partners { display: flex; flex-wrap: wrap; align-items: baseline; gap: .75rem 2.5rem; margin-top: 2.5rem; padding-block: 1.25rem; border-block: 1px solid var(--line); }
.partners h3 { font-weight: 500; color: var(--muted); font-size: .9375rem; }
.partners ul { display: flex; flex-wrap: wrap; gap: .75rem 2.5rem; }
.partners strong { font: 400 1.375rem/1 'Marcellus', serif; margin-inline-end: .5rem; }
.partners span { color: var(--muted); font-size: .9375rem; }

.risks { width: 100%; margin-top: 2.5rem; border-collapse: collapse; }
.risks th, .risks td { padding-block: 1.1rem; padding-inline: 0 1.5rem; text-align: start; vertical-align: top; border-top: 1px solid var(--line); font-size: .9375rem; }
.risks thead th { border-top: 0; font-weight: 500; font-size: .875rem; color: var(--muted); }
.risks tbody th { font-weight: 600; width: 22%; }
.risks td { color: var(--muted); width: 39%; }
.risks tbody tr:last-child > * { border-bottom: 1px solid var(--line); }
@media (max-width: 47.99rem) {
  .risks, .risks tbody, .risks tr, .risks th, .risks td { display: block; width: auto; }
  .risks thead { position: absolute; width: 1px; height: 1px; overflow: hidden; clip-path: inset(50%); }
  .risks tr { padding-block: 1.1rem; border-top: 1px solid var(--line); }
  .risks th, .risks td { padding: 0; border: 0 !important; }
  .risks tbody th { font-size: 1.0625rem; width: auto; }
  .risks td { margin-top: .75rem; width: auto; }
  .risks td::before { content: attr(data-l); display: block; font-size: .8125rem; color: var(--text); opacity: .7; }
}

/* Inversión */
.invest { display: grid; gap: 2.5rem clamp(2rem, 6vw, 6rem); align-items: end; }
@media (min-width: 62rem) { .invest { grid-template-columns: 7fr 5fr; } }
.invest .rows > div { grid-template-columns: 1fr; }
.invest .rows dd { font-size: 1.0625rem; }
.steps { display: grid; margin-top: 1.25rem; }
.steps li { position: relative; padding-block: 0 1.75rem; padding-inline-start: 3.25rem; }
.steps li::before { content: ''; position: absolute; inset-inline-start: 1.0625rem; top: 2.25rem; bottom: 0; width: 1px; background: var(--gold); }
.steps li:last-child::before { display: none; }
.steps__n { position: absolute; inset-inline-start: 0; top: 0; display: grid; place-items: center; width: 2.25rem; height: 2.25rem; border: 1px solid var(--gold); color: var(--gold-ink); font: 400 1.0625rem/1 'Marcellus', serif; background: var(--bg-2); }
.steps h3 { padding-top: .3rem; }
.steps p { margin-top: .25rem; font-size: .9375rem; color: var(--muted); max-width: 36ch; }
@media (min-width: 62rem) {
  .steps { grid-template-columns: repeat(5, 1fr); }
  .steps li { padding: 3.25rem 1.5rem 0 0; padding-inline: 0 1.5rem; }
  .steps li::before { inset-inline: 2.25rem 0; top: 1.125rem; bottom: auto; width: auto; height: 1px; }
}

/* Contacto */
.contact { display: grid; gap: 3rem clamp(2rem, 6vw, 6rem); }
@media (min-width: 62rem) { .contact { grid-template-columns: 7fr 4fr; } }
.contact__aside { align-self: start; padding: 1.5rem; background: var(--surface); border: 1px solid var(--line); }
.contact__aside h3 { font: 400 1.25rem/1.3 'Marcellus', serif; margin-bottom: 1rem; }
.contact__aside .rows > div { grid-template-columns: 1fr; }
.form { display: grid; gap: 1.25rem 1.5rem; margin-top: 2.25rem; }
@media (min-width: 40rem) { .form { grid-template-columns: 1fr 1fr; } .field--wide { grid-column: 1 / -1; } }
.field label { display: block; margin-bottom: .375rem; font-size: .9375rem; font-weight: 500; }
.field__opt { font-weight: 400; color: var(--muted); }
.field input, .field textarea { width: 100%; min-height: 3rem; padding: .7rem .875rem; background: var(--surface); border: 1px solid var(--line); border-bottom-color: var(--muted); color: var(--text); font: inherit; border-radius: 0; transition: border-color .15s; }
.field input:focus, .field textarea:focus { border-color: var(--gold); outline: none; box-shadow: 0 0 0 1px var(--gold); }
.field input[dir="ltr"]:lang(ar) { text-align: end; }
.field textarea { resize: vertical; }
.field [aria-invalid="true"] { border-color: var(--err); }
.field__err { margin-top: .375rem; font-size: .875rem; color: var(--err); }
.form__status { margin-top: 1rem; font-size: .9375rem; }
.form__status:empty { display: none; }
.form__status.is-err { color: var(--err); }
.form__status.is-ok { color: var(--green); }

/* Pie */
.foot { padding-block: clamp(3rem, 6vw, 5rem) 2rem; border-top: 1px solid var(--line); background: var(--bg-2); }
.foot__h { font: 600 .9375rem/1.4 var(--body); max-width: none; }
.foot__notice { margin-top: 1rem; font-size: .8125rem; line-height: 1.65; color: var(--muted); columns: 3 20rem; column-gap: var(--gap); }
.foot__notice p { margin-bottom: .875rem; break-inside: avoid; }
.foot__end { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 1rem; margin-top: 2rem; padding-top: 1.5rem; border-top: 1px solid var(--line); font-size: .875rem; color: var(--muted); }
.foot__end .brand { font-size: 1rem; color: var(--text); margin-inline-end: .75rem; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition: none !important; }
}
@media print { .top, .hero__video, .hero__pause, .form, .ticket { display: none; } }