/* MX7K México — techno-minimal, monospace digits, neon "7" motif */

:root{
  --ink:#f2f3f6;
  --ink-dim:#98a0b8;
  --bg:#15161c;
  --bg-raised:#23262f;
  --bg-sunken:#0e0f13;
  --gold:#f9bc01;
  --gold-soft:#d9a600;
  --slate:#798098;
  --line:#2a2d38;
  --line-soft:#20222b;
  --font:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;
  --font-mono:ui-monospace,"SFMono-Regular","Cascadia Mono","Roboto Mono",Consolas,"Liberation Mono",monospace;
  --maxw:1180px;
}

*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;overflow-x:clip}
body{
  margin:0;background:var(--bg);color:var(--ink);
  font-family:var(--font);line-height:1.55;font-size:16px;overflow-x:clip;
}
img{max-width:100%;display:block}
a{color:var(--gold);text-decoration:none}
a:hover{text-decoration:underline}
button{font-family:inherit}
ul,ol{margin:0;padding:0}
.visually-hidden{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 20px;min-width:0}
.mono{font-family:var(--font-mono)}

/* ---------- Header ---------- */
.site-header{position:sticky;top:0;z-index:40;background:rgba(21,22,28,.96);border-bottom:1px solid var(--line)}
.site-header .wrap{display:flex;align-items:center;justify-content:space-between;height:66px;gap:16px}
.wordmark{display:flex;align-items:center;flex-shrink:0}
.wordmark img{height:26px;width:auto}
.desktop-nav{display:none}
.desktop-nav ul{display:flex;list-style:none;gap:26px;align-items:center}
.desktop-nav a{
  color:var(--ink-dim);font-weight:600;font-size:.86rem;font-family:var(--font-mono);
  letter-spacing:.02em;padding:6px 2px;border-bottom:2px solid transparent;
}
.desktop-nav a:hover,.desktop-nav a[aria-current="page"]{color:var(--ink);border-bottom-color:var(--gold);text-decoration:none}
.header-actions{display:flex;align-items:center;gap:10px}

.btn{
  display:inline-flex;align-items:center;justify-content:center;
  padding:10px 18px;border-radius:2px;font-weight:700;font-size:.88rem;
  letter-spacing:.02em;border:1px solid transparent;cursor:pointer;white-space:nowrap;
}
.btn-gold{background:var(--gold);color:#15161c;box-shadow:0 0 0 rgba(249,188,1,0);transition:box-shadow .18s ease,background .18s ease}
.btn-gold:hover{background:#ffd23d;text-decoration:none;box-shadow:0 0 18px rgba(249,188,1,.45)}
.btn-ghost{background:transparent;color:var(--ink);border-color:var(--line)}
.btn-ghost:hover{border-color:var(--gold);color:var(--gold);text-decoration:none}
.btn-block{width:100%}

.burger{
  display:flex;flex-direction:column;justify-content:center;gap:5px;
  width:40px;height:40px;background:transparent;border:1px solid var(--line);
  border-radius:2px;cursor:pointer;flex-shrink:0;
}
.burger span{display:block;height:2px;width:18px;margin:0 auto;background:var(--ink);transition:transform .2s ease,opacity .2s ease}
.burger[aria-expanded="true"] span:nth-child(1){transform:translateY(7px) rotate(45deg)}
.burger[aria-expanded="true"] span:nth-child(2){opacity:0}
.burger[aria-expanded="true"] span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}

/* ---------- Mobile off-canvas nav (sibling of header, not nested) ---------- */
.mobile-nav-scrim{position:fixed;inset:0;background:rgba(0,0,0,.6);z-index:48;opacity:0;pointer-events:none;transition:opacity .2s ease}
.mobile-nav-scrim.is-open{opacity:1;pointer-events:auto}
.mobile-nav{
  position:fixed;top:0;right:0;height:100%;width:min(86vw,340px);
  background:var(--bg-raised);z-index:49;border-left:1px solid var(--line);
  transform:translateX(100%);transition:transform .25s ease;overflow-y:auto;padding:20px;
}
.mobile-nav.is-open{transform:translateX(0)}
.mobile-nav-top{display:flex;justify-content:space-between;align-items:center;margin-bottom:22px}
.mobile-nav-top img{height:22px;width:auto}
.mobile-nav-close{width:36px;height:36px;border:1px solid var(--line);background:transparent;color:var(--ink);border-radius:2px;font-size:1.1rem;cursor:pointer;line-height:1}
.mobile-nav ul{list-style:none;display:flex;flex-direction:column;gap:2px}
.mobile-nav a{display:block;padding:14px 4px;color:var(--ink);font-weight:700;font-family:var(--font-mono);font-size:1rem;border-bottom:1px solid var(--line-soft)}
.mobile-nav a:hover{color:var(--gold);text-decoration:none}
.mobile-nav .mobile-nav-cta{margin-top:20px;display:flex;flex-direction:column;gap:10px}

@media (min-width:861px){.burger{display:none}.desktop-nav{display:block}}
@media (max-width:860px){.header-actions .btn-ghost{display:none}}

/* ---------- Hero ---------- */
.hero{position:relative;overflow:hidden;background:
    repeating-linear-gradient(0deg,transparent,transparent 39px,rgba(121,128,152,.08) 39px,rgba(121,128,152,.08) 40px),
    repeating-linear-gradient(90deg,transparent,transparent 39px,rgba(121,128,152,.08) 39px,rgba(121,128,152,.08) 40px),
    var(--bg);
  border-bottom:1px solid var(--line);
}
.hero::before{
  content:"7";position:absolute;top:-.32em;right:-.08em;
  font-family:var(--font);font-weight:800;font-size:min(34vw,420px);line-height:1;
  color:rgba(249,188,1,.05);pointer-events:none;user-select:none;
}
.hero .wrap{position:relative;padding:46px 20px 38px}
.kicker{
  display:inline-flex;align-items:center;gap:9px;color:var(--gold);
  font-weight:700;font-size:.74rem;font-family:var(--font-mono);
  letter-spacing:.16em;text-transform:uppercase;margin:0 0 16px;
}
.kicker::before{content:"";width:10px;height:10px;border:1px solid var(--gold);display:inline-block;transform:rotate(45deg)}
.hero h1{margin:0 0 16px;font-size:clamp(1.6rem,4.4vw,2.6rem);line-height:1.14;font-weight:800;letter-spacing:-.01em;max-width:22ch}
.hero .lede{margin:0;color:var(--ink-dim);font-size:1.02rem;max-width:64ch}
.hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:24px}

.stat-strip{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:1px;background:var(--line);border:1px solid var(--line);margin-top:30px;border-radius:2px;overflow:hidden}
@media (min-width:640px){.stat-strip{grid-template-columns:repeat(4,minmax(0,1fr))}}
.stat-strip div{background:var(--bg-raised);padding:14px 12px;min-width:0}
.stat-num{display:block;font-weight:700;font-size:1.24rem;color:var(--gold);font-family:var(--font-mono);font-variant-numeric:tabular-nums;line-height:1.1;overflow-wrap:anywhere}
.stat-label{display:block;font-size:.7rem;color:var(--ink-dim);margin-top:5px;letter-spacing:.03em}

/* breadcrumbs */
.crumbs{padding:14px 0 0}
.crumbs ol{list-style:none;display:flex;flex-wrap:wrap;gap:6px;font-size:.78rem;color:var(--ink-dim);font-family:var(--font-mono)}
.crumbs li{display:flex;align-items:center;gap:6px;min-width:0}
.crumbs li:not(:last-child)::after{content:"/";color:var(--line)}
.crumbs a{color:var(--ink-dim)}
.crumbs a:hover{color:var(--gold)}
.crumbs li[aria-current="page"]{color:var(--gold);overflow:hidden;text-overflow:ellipsis;white-space:nowrap;max-width:60vw}

/* ---------- Article ---------- */
.article-section{padding:46px 0}
.article-section .wrap{max-width:820px}
article h2{
  font-size:clamp(1.25rem,2.8vw,1.6rem);font-weight:800;letter-spacing:-.005em;
  margin:2.2em 0 .6em;padding-top:.4em;border-top:1px dashed var(--line);color:var(--ink);
}
article h2:first-of-type{border-top:none;margin-top:0;padding-top:0}
article p{color:var(--ink-dim);margin:0 0 1.1em;max-width:70ch}
article p:last-child{margin-bottom:0}
article strong{color:var(--ink)}

.table-wrap{overflow-x:auto;margin:1.4em 0;border:1px solid var(--line);border-radius:2px;-webkit-overflow-scrolling:touch}
article table{width:100%;min-width:420px;border-collapse:collapse;table-layout:fixed;font-size:.9rem;background:var(--bg-raised)}
article table th,article table td{padding:11px 14px;text-align:left;border-bottom:1px solid var(--line-soft);overflow-wrap:anywhere}
article table th{color:var(--gold);font-weight:700;background:var(--bg-sunken);font-family:var(--font-mono);font-size:.78rem;letter-spacing:.04em;text-transform:uppercase}
article table tr:last-child td{border-bottom:none}
@media (max-width:560px){article table th,article table td{padding:8px 10px;font-size:.8rem}}

/* FAQ */
.faq-item{border-bottom:1px solid var(--line-soft)}
.faq-item:first-child{border-top:1px solid var(--line-soft)}
article .faq-item h3{margin:0}
.faq-q{width:100%;text-align:left;background:transparent;border:0;cursor:pointer;color:var(--ink);font-weight:700;font-size:.98rem;padding:16px 34px 16px 0;position:relative;line-height:1.4}
.faq-q::after{content:"+";position:absolute;right:2px;top:13px;color:var(--gold);font-size:1.3rem;font-weight:400;line-height:1;font-family:var(--font-mono)}
.faq-q[aria-expanded="true"]::after{content:"–"}
.faq-a{overflow:hidden;max-height:0;transition:max-height .22s ease}
.faq-a p{padding-bottom:16px;margin:0}
.faq-item.is-open .faq-a{max-height:420px}

.rg-note{margin-top:2.4em;padding:16px 18px;border:1px solid var(--line);border-left:3px solid var(--gold);background:var(--bg-raised);color:var(--ink-dim);font-size:.88rem;border-radius:0 2px 2px 0}
.rg-note p{margin:0;max-width:none}
.rg-note h2{border-top:none;margin:0 0 .5em;padding-top:0;font-size:1.05rem}

/* ---------- Catalog signal-grid (index only, no donor tile images) ---------- */
.catalog-section{padding:46px 0;background:var(--bg-sunken);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.section-head{display:flex;flex-wrap:wrap;justify-content:space-between;align-items:flex-end;gap:16px;margin-bottom:20px}
.section-label{margin:0;font-weight:800;font-size:1.3rem;letter-spacing:-.01em;color:var(--ink)}
.section-sub{margin:6px 0 0;color:var(--ink-dim);font-size:.9rem;max-width:60ch}

.chip-row{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:22px}
.chip{border:1px solid var(--line);background:transparent;color:var(--ink-dim);padding:7px 14px;border-radius:2px;font-size:.78rem;font-weight:600;cursor:pointer;font-family:var(--font-mono);letter-spacing:.03em}
.chip[aria-pressed="true"]{background:var(--gold);border-color:var(--gold);color:#15161c}

.catalog-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}
@media (min-width:560px){.catalog-grid{grid-template-columns:repeat(3,minmax(0,1fr))}}
@media (min-width:900px){.catalog-grid{grid-template-columns:repeat(4,minmax(0,1fr))}}
.catalog-card{
  min-width:0;border:1px solid var(--line);border-radius:2px;background:var(--bg-raised);
  padding:14px;display:flex;flex-direction:column;gap:10px;position:relative;
}
.catalog-card::before{content:"";position:absolute;top:0;left:0;width:8px;height:8px;border-top:1px solid var(--gold);border-left:1px solid var(--gold);opacity:.7}
.catalog-card::after{content:"";position:absolute;bottom:0;right:0;width:8px;height:8px;border-bottom:1px solid var(--gold);border-right:1px solid var(--gold);opacity:.7}
.catalog-idx{font-family:var(--font-mono);color:var(--gold);font-size:.78rem;letter-spacing:.05em;font-variant-numeric:tabular-nums}
.catalog-name{font-weight:700;color:var(--ink);font-size:.94rem;line-height:1.3;overflow-wrap:anywhere}
.catalog-tag{font-family:var(--font-mono);font-size:.68rem;color:var(--slate);letter-spacing:.06em;text-transform:uppercase}
.catalog-card[hidden]{display:none}

/* ---------- Callout CTA band ---------- */
.cta-band{padding:42px 0;border-bottom:1px solid var(--line);background:linear-gradient(120deg,var(--bg-raised) 0%,var(--bg) 72%)}
.cta-band .wrap{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:20px}
.cta-copy p{margin:0;max-width:50ch;color:var(--ink-dim)}
.cta-copy .cta-title{color:var(--ink);font-weight:800;font-size:1.12rem;margin:0 0 6px}

/* ---------- Footer ---------- */
.site-footer{background:var(--bg-sunken);border-top:1px solid var(--line);padding:42px 0 24px}
.footer-grid{display:grid;grid-template-columns:1fr;gap:28px}
@media (min-width:640px){.footer-grid{grid-template-columns:1.3fr 1fr 1fr}}
.footer-brand img{height:24px;width:auto;margin-bottom:12px}
.footer-brand p{color:var(--ink-dim);font-size:.85rem;max-width:38ch;margin:0}
.footer-col p.col-title{color:var(--ink);font-weight:700;font-size:.76rem;letter-spacing:.08em;text-transform:uppercase;margin:0 0 12px;font-family:var(--font-mono)}
.footer-col ul{list-style:none;display:flex;flex-direction:column;gap:9px}
.footer-col a{color:var(--ink-dim);font-size:.9rem}
.footer-col a:hover{color:var(--gold)}
.footer-legal{margin-top:32px;padding-top:20px;border-top:1px solid var(--line);display:flex;flex-direction:column;gap:10px;color:var(--ink-dim);font-size:.78rem;font-family:var(--font-mono)}
.footer-legal .age{display:inline-flex;align-items:center;justify-content:center;width:26px;height:26px;border:1px solid var(--gold);color:var(--gold);font-weight:800;font-size:.68rem;border-radius:50%;flex-shrink:0}
.footer-legal .rg-line{display:flex;align-items:center;gap:10px}

@media (max-width:400px){
  .wrap{padding:0 14px}
  .hero .wrap{padding:34px 14px 30px}
}