:root {
  --bg: #0B0B12;
  --bg-raise: #121220;
  --panel: #181826;
  --panel-line: rgba(122,92,255,0.30);
  --violet: #7A5CFF;
  --cyan: #26E5FF;
  --magenta: #FF2FB3;
  --lime: #C6FF3A;
  --ink: #F4F6FF;
  --ink-dim: #9EA0BE;
  --mesh: rgba(122,92,255,0.09);
  --font-display: 'Unbounded', system-ui, sans-serif;
  --font-body: 'Sora', system-ui, -apple-system, sans-serif;
  --font-mono: 'JetBrains Mono', ui-monospace, 'SF Mono', Consolas, monospace;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background-color: var(--bg);
  background-image:
    linear-gradient(var(--mesh) 1px, transparent 1px),
    linear-gradient(90deg, var(--mesh) 1px, transparent 1px);
  background-size: 38px 38px;
  color: var(--ink);
  font-family: var(--font-body);
  min-height: 100vh;
  line-height: 1.55;
}

a { color: var(--cyan); }

.cut {
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 14px), calc(100% - 14px) 100%, 0 100%);
}

/* --- topbar --- */
.hub-topbar {
  display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 12px;
  padding: 16px 40px;
  border-bottom: 1px solid var(--panel-line);
  background: linear-gradient(180deg, var(--bg-raise), transparent);
}
.hub-brand { display: flex; align-items: center; gap: 10px; text-decoration: none; }
.hub-brand svg { width: 26px; height: 26px; display: block; }
.hub-brand .word { font-family: var(--font-display); font-weight: 800; font-size: 17px; color: var(--ink); letter-spacing: 0.01em; }
.hub-brand .word .lab {
  background: linear-gradient(90deg, var(--violet), var(--cyan));
  -webkit-background-clip: text; background-clip: text; color: transparent;
}

.hub-nav { display: flex; gap: 24px; align-items: center; flex-wrap: wrap; font-family: var(--font-mono); font-size: 12px; text-transform: uppercase; letter-spacing: 0.06em; }
.hub-nav a { color: var(--ink-dim); text-decoration: none; }
.hub-nav a:hover { color: var(--cyan); }
.hub-nav a strong { color: var(--lime); font-weight: 700; }

/* --- flashes --- */
.hub-flashes { max-width: 1040px; margin: 16px auto 0; padding: 0 40px; }
.hub-flash {
  padding: 12px 16px; font-size: 14px; margin-bottom: 8px;
  background: var(--panel); border-left: 3px solid var(--panel-line); color: var(--ink);
}
.hub-flash-error { border-left-color: var(--magenta); }
.hub-flash-success { border-left-color: var(--lime); }

.hub-main { max-width: 1040px; margin: 40px auto 80px; padding: 0 40px; }

/* Apps con sidebar+viewport (plano2dxf, wearsection, tilenesting) necesitan
   mucho más ancho que las páginas de texto (login, dashboard, billing). */
.hub-main.app-wide { max-width: 1600px; }

.hub-h1 { font-family: var(--font-display); font-weight: 800; font-size: 28px; margin: 0 0 8px; }
.hub-h2 { font-family: var(--font-display); font-weight: 800; font-size: 17px; margin: 34px 0 14px; text-transform: uppercase; letter-spacing: 0.04em; }
.hub-sub { color: var(--ink-dim); font-size: 14px; margin: 0 0 24px; }
.hub-sub strong { color: var(--ink); }
.hub-sub a { color: var(--cyan); }

/* --- landing pública (visitante sin sesión) --- */
.hero { padding: 56px 0 44px; }
.hero-title { font-family: var(--font-display); font-weight: 800; font-size: 40px; line-height: 1.15; margin: 0 0 18px; }
.hero-sub { color: var(--ink-dim); font-size: 15px; max-width: 620px; margin: 0 0 28px; }
.hero-actions { display: flex; gap: 14px; flex-wrap: wrap; }

/* --- catálogo de apps --- */
.app-grid {
  display: grid; grid-template-columns: repeat(auto-fill, minmax(240px, 1fr)); gap: 18px;
  counter-reset: appidx;
}
.app-card {
  display: block; background: var(--panel); border: 1px solid var(--panel-line);
  color: var(--ink); padding: 22px 22px 20px; text-decoration: none;
  transition: border-color .15s ease, transform .15s ease;
}
.app-card:hover { border-color: var(--cyan); transform: translateY(-2px); }
.app-card::before {
  counter-increment: appidx; content: "0" counter(appidx);
  display: block; margin-bottom: 10px;
  font-family: var(--font-mono); font-size: 11px; color: var(--cyan); letter-spacing: 0.1em;
}
.app-card h2 { margin: 0 0 8px; font-size: 18px; font-family: var(--font-display); font-weight: 700; color: var(--ink); }
.app-card p { margin: 0 0 16px; font-size: 13px; color: var(--ink-dim); }
.app-cost {
  display: block; font-family: var(--font-mono); font-size: 11px; color: var(--lime);
  border-top: 1px solid var(--panel-line); padding-top: 12px;
}

.app-card.soon { cursor: default; opacity: 0.72; }
.app-card.soon:hover { border-color: var(--panel-line); transform: none; }
.app-card.soon::before { color: var(--ink-dim); }
.badge-soon {
  display: inline-block; font-family: var(--font-mono); font-size: 10px; text-transform: uppercase;
  letter-spacing: 0.06em; color: var(--magenta); border: 1px solid var(--magenta);
  padding: 3px 8px; margin-bottom: 12px;
}

/* --- MechLab News (placeholder) --- */
.news-placeholder {
  background: var(--panel); border: 1px solid var(--panel-line);
  padding: 22px; color: var(--ink-dim); font-size: 13px;
}

/* --- formularios (login/registro) --- */
.auth-box {
  max-width: 380px; margin: 60px auto; background: var(--panel); border: 1px solid var(--panel-line);
  color: var(--ink); padding: 34px 30px 30px;
}
.field { display: block; font-size: 11px; margin: 16px 0; color: var(--ink-dim); font-family: var(--font-mono); text-transform: uppercase; letter-spacing: 0.06em; }
.field input, .field select {
  display: block; width: 100%; margin-top: 8px; padding: 11px 12px;
  background: var(--bg); border: 1px solid var(--panel-line); color: var(--ink);
  font-size: 14px; font-family: var(--font-body);
}
.field input:focus, .field select:focus { outline: none; border-color: var(--cyan); }

.btn-primary, .btn-secondary {
  display: inline-block; font-family: var(--font-mono); font-size: 13px; font-weight: 700;
  text-transform: uppercase; letter-spacing: 0.05em; padding: 12px 22px; cursor: pointer; border: none;
  text-decoration: none;
}
.btn-primary {
  background: linear-gradient(90deg, var(--magenta), var(--violet)); color: #0B0B12; margin-top: 10px;
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 10px), calc(100% - 10px) 100%, 0 100%);
}
.btn-primary:hover { filter: brightness(1.12); }
.btn-secondary { background: transparent; color: var(--ink); border: 1px solid var(--panel-line); }
.btn-secondary:hover { border-color: var(--cyan); color: var(--cyan); }

/* --- save this calculation ("Mis calculos") --- */
.save-form { display: flex; flex-wrap: wrap; align-items: center; gap: 12px 16px; }
.save-check { display: flex; align-items: center; gap: 8px; font-size: 13px; color: var(--ink); flex: 1 1 260px; }
.save-check input[type="checkbox"] { width: 16px; height: 16px; accent-color: var(--violet); flex-shrink: 0; }
.save-label {
  flex: 1 1 220px; padding: 9px 11px; background: var(--bg); border: 1px solid var(--panel-line);
  color: var(--ink); font-size: 13px; font-family: var(--font-body);
}
.save-label:focus { outline: none; border-color: var(--cyan); }
.save-hint { margin: 10px 0 0; font-size: 12px; }
.saved-table { width: 100%; border-collapse: collapse; background: var(--panel); border: 1px solid var(--panel-line); font-size: 13px; }
.saved-table th, .saved-table td { padding: 12px 14px; text-align: left; border-bottom: 1px solid var(--panel-line); vertical-align: middle; }
.saved-table th { font-family: var(--font-mono); font-size: 10px; text-transform: uppercase; color: var(--ink-dim); letter-spacing: 0.06em; }
.saved-table .btn-secondary { padding: 7px 14px; font-size: 11px; margin-right: 6px; }
.saved-empty { background: var(--panel); border: 1px solid var(--panel-line); padding: 26px; color: var(--ink-dim); font-size: 14px; text-align: center; }

/* --- admin panel (/admin) --- */
.adm-tiles { display: grid; grid-template-columns: repeat(auto-fit, minmax(190px, 1fr)); gap: 14px; margin-bottom: 8px; }
.adm-tile { background: var(--panel); border: 1px solid var(--panel-line); padding: 16px 18px; display: flex; flex-direction: column; gap: 4px; }
.adm-num { font-family: var(--font-display); font-weight: 800; font-size: 26px; color: var(--ink); line-height: 1.1; }
.adm-lbl { font-family: var(--font-mono); font-size: 11px; text-transform: uppercase; letter-spacing: .06em; color: var(--ink); }
.adm-sub { font-size: 12px; color: var(--ink-dim); }
.adm-chart { background: var(--panel); border: 1px solid var(--panel-line); padding: 14px 16px 8px; }
.adm-chart svg { display: block; width: 100%; height: auto; }
.adm-bar { fill: var(--violet); }
.adm-hit { fill: transparent; }
.adm-hit:hover { fill: var(--mesh); }
.adm-axis { stroke: var(--panel-line); stroke-width: 1; }
.adm-tick { fill: var(--ink-dim); font-family: var(--font-mono); font-size: 10px; }
.adm-empty { margin: 4px 0 6px; text-align: center; }
.adm-details { margin: 10px 0 24px; }
.adm-details summary { cursor: pointer; color: var(--cyan); font-size: 13px; margin-bottom: 10px; }
.adm-note { margin: 10px 0 24px; font-size: 13px; }
.adm-badge { display: inline-block; min-width: 20px; padding: 1px 7px; margin-left: 8px; background: var(--magenta); color: #0B0B12; font-family: var(--font-mono); font-size: 12px; font-weight: 700; text-align: center; vertical-align: middle; }
.adm-inline { display: flex; flex-wrap: wrap; gap: 8px; align-items: center; margin: 0; }
.adm-inline input { padding: 8px 10px; background: var(--bg); border: 1px solid var(--panel-line); color: var(--ink); font-size: 13px; width: 110px; }
.adm-inline input[type="text"] { width: 200px; }
.adm-inline .btn-secondary { padding: 7px 14px; font-size: 11px; margin: 0; }
.adm-grant { margin: 14px 0 28px; }
.adm-msg { white-space: pre-wrap; overflow-wrap: anywhere; max-width: 420px; }
.adm-messages { display: flex; flex-direction: column; gap: 10px; margin-bottom: 8px; }
.adm-message { background: var(--panel); border: 1px solid var(--panel-line); padding: 12px 16px; font-size: 13px; }
.adm-message-head { font-size: 12px; color: var(--ink-dim); margin-bottom: 6px; }
.adm-alert { background: rgba(255,47,179,.10); border: 1px solid var(--magenta); padding: 12px 18px; margin: 0 0 18px; font-size: 14px; color: var(--ink); }
.adm-alert strong { color: var(--magenta); margin-right: 6px; }
.adm-alert a { color: var(--cyan); margin-left: 8px; }
.adm-good { color: var(--lime); }
.adm-warn { color: #FFB020; }
.adm-bad { color: var(--magenta); }
.adm-tile .adm-num.adm-warn, .adm-tile .adm-num.adm-bad, .adm-tile .adm-num.adm-good { font-size: 22px; }
.adm-h3 { font-family: var(--font-mono); font-size: 11px; letter-spacing: .08em; text-transform: uppercase; color: var(--ink-dim); margin: 22px 0 8px; font-weight: 500; }
.saved-table .num { text-align: right; font-variant-numeric: tabular-nums; }

/* --- token requests + soft-launch banner --- */
.req-form { display: flex; flex-wrap: wrap; gap: 14px 16px; align-items: flex-end; margin-bottom: 22px; }
.req-field { display: flex; flex-direction: column; gap: 6px; font-family: var(--font-mono); font-size: 11px; text-transform: uppercase; letter-spacing: .06em; color: var(--ink-dim); }
.req-field select, .req-field input { padding: 11px 12px; background: var(--bg); border: 1px solid var(--panel-line); color: var(--ink); font-size: 14px; font-family: var(--font-body); text-transform: none; letter-spacing: 0; }
.req-field select:focus, .req-field input:focus { outline: none; border-color: var(--cyan); }
.req-grow { flex: 1 1 280px; }
.req-form .btn-primary { margin-top: 0; }
.req-table { margin-top: 4px; }
.beta-banner { background: rgba(122,92,255,.12); border-bottom: 1px solid var(--panel-line); padding: 9px 48px; font-size: 13px; color: var(--ink); text-align: center; }
.beta-banner strong { font-family: var(--font-mono); font-size: 11px; letter-spacing: .08em; text-transform: uppercase; color: var(--cyan); margin-right: 8px; }
.beta-banner a { color: var(--cyan); }
.legal { max-width: 760px; }
.legal h2 { font-family: var(--font-display); font-size: 16px; margin: 30px 0 8px; }
.legal p, .legal li { font-size: 14px; line-height: 1.7; color: var(--ink-dim); }
.legal ul { padding-left: 20px; }
.legal a { color: var(--cyan); }
@media (max-width: 640px) { .beta-banner { padding: 9px 20px; } }

/* --- billing --- */
.billing-note {
  background: rgba(122,92,255,0.08); border: 1px solid var(--panel-line);
  padding: 14px 18px; font-size: 13px; color: var(--ink-dim); margin-bottom: 12px;
}
.package-grid { display: flex; gap: 16px; flex-wrap: wrap; }
.package-card { background: var(--panel); border: 1px solid var(--panel-line); color: var(--ink); padding: 20px; text-align: center; min-width: 150px; }
.package-amount { display: block; font-family: var(--font-display); font-weight: 800; font-size: 19px; margin-bottom: 12px; }

.tx-table { width: 100%; border-collapse: collapse; background: var(--panel); border: 1px solid var(--panel-line); font-size: 13px; }
.tx-table th, .tx-table td { padding: 12px 14px; text-align: left; border-bottom: 1px solid var(--panel-line); }
.tx-table th { font-family: var(--font-mono); font-size: 10px; text-transform: uppercase; color: var(--ink-dim); letter-spacing: 0.06em; }
.tx-positive { color: var(--lime); font-family: var(--font-mono); }
.tx-negative { color: var(--magenta); font-family: var(--font-mono); }

@media (max-width: 640px) {
  .hub-topbar, .hub-flashes, .hub-main { padding-left: 20px; padding-right: 20px; }
  .hub-nav { gap: 14px; }
}

/* =====================================================================
   Sitio publico, navegacion movil, microinteracciones y movimiento
   ===================================================================== */
html { scroll-behavior: smooth; }
.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0,0,0,0); white-space: nowrap; border: 0; }
.skip-link { position: absolute; left: 12px; top: -48px; z-index: 200; background: var(--violet); color: #0B0B12; padding: 10px 16px; font-family: var(--font-mono); font-size: 13px; text-decoration: none; transition: top .15s ease; }
.skip-link:focus { top: 12px; }
.hp-field { position: absolute; left: -9999px; width: 1px; height: 1px; overflow: hidden; }

/* foco visible y estados hover/active (teclado y mouse) */
a:focus-visible, button:focus-visible, input:focus-visible, select:focus-visible, textarea:focus-visible, summary:focus-visible {
  outline: 2px solid var(--cyan); outline-offset: 2px;
}
.btn-primary, .btn-secondary, .app-card, .hub-nav a, .footer-col a, .to-top {
  transition: transform .15s ease, filter .15s ease, border-color .15s ease, color .15s ease, background-color .15s ease, box-shadow .15s ease;
}
.btn-primary:hover { transform: translateY(-1px); box-shadow: 0 6px 22px rgba(122,92,255,.35); }
.btn-primary:active, .btn-secondary:active { transform: translateY(1px) scale(.98); box-shadow: none; }
.btn-primary:disabled, .btn-secondary:disabled { opacity: .6; cursor: progress; transform: none; }
.hub-nav a:hover, .footer-col a:hover { color: var(--cyan); }
.app-card h3 { margin: 0 0 8px; font-size: 18px; font-family: var(--font-display); font-weight: 700; color: var(--ink); }
.field textarea {
  display: block; width: 100%; margin-top: 8px; padding: 11px 12px; background: var(--bg);
  border: 1px solid var(--panel-line); color: var(--ink); font-size: 14px; font-family: var(--font-body); resize: vertical;
}
.field textarea:focus { outline: none; border-color: var(--cyan); }
form.is-loading { cursor: progress; }
.contact-box { max-width: 560px; }

/* barra superior + menu movil */
.nav-toggle { display: none; background: none; border: 1px solid var(--panel-line); padding: 9px 10px; cursor: pointer; flex-direction: column; gap: 4px; }
.nav-toggle span { display: block; width: 18px; height: 2px; background: var(--ink); transition: transform .2s ease, opacity .2s ease; }
.nav-toggle[aria-expanded="true"] span:nth-child(1) { transform: translateY(6px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.nav-toggle[aria-expanded="true"] span:nth-child(3) { transform: translateY(-6px) rotate(-45deg); }
.hub-topbar { position: sticky; top: 0; z-index: 90; backdrop-filter: blur(10px); background: linear-gradient(180deg, rgba(18,18,32,.96), rgba(11,11,18,.88)); }

/* landing / paginas de herramienta */
.hero { position: relative; }
.hero::before {
  content: ""; position: absolute; z-index: -1; left: -6%; top: -10%; width: 520px; height: 320px;
  background: radial-gradient(closest-side, rgba(122,92,255,.28), transparent 70%);
  filter: blur(24px); animation: hero-glow 9s ease-in-out infinite alternate;
}
.hero-title { animation: rise .7s cubic-bezier(.2,.7,.2,1) both; }
.hero-sub { animation: rise .7s .12s cubic-bezier(.2,.7,.2,1) both; }
.hero-actions { animation: rise .7s .24s cubic-bezier(.2,.7,.2,1) both; align-items: center; }
.tool-h1 { font-size: 34px; max-width: 900px; }
.share-status { font-family: var(--font-mono); font-size: 12px; color: var(--lime); min-height: 16px; }
@keyframes rise { from { opacity: 0; transform: translateY(14px); } to { opacity: 1; transform: none; } }
@keyframes hero-glow { from { transform: translate(0,0) scale(1); opacity: .7; } to { transform: translate(40px,18px) scale(1.15); opacity: 1; } }

.js .reveal { opacity: 0; transform: translateY(18px); transition: opacity .6s ease, transform .6s cubic-bezier(.2,.7,.2,1); }
.js .reveal.in { opacity: 1; transform: none; }

.tldr { background: rgba(122,92,255,.08); border: 1px solid var(--panel-line); border-left: 3px solid var(--violet); padding: 18px 22px; margin: 6px 0 34px; max-width: 900px; }
.tldr-h { font-family: var(--font-mono); font-size: 12px; text-transform: uppercase; letter-spacing: .08em; color: var(--cyan); margin: 0 0 10px; }
.tldr ul { margin: 0; padding-left: 20px; }
.tldr li { margin: 4px 0; font-size: 15px; }

.table-wrap { overflow-x: auto; -webkit-overflow-scrolling: touch; }
.compare-table th[scope="row"], .glance-table th[scope="row"] { font-family: var(--font-body); font-size: 14px; text-transform: none; letter-spacing: 0; color: var(--ink); white-space: nowrap; }
.compare-table td, .glance-table td { color: var(--ink-dim); }
.glance-table th[scope="row"] { width: 180px; color: var(--ink-dim); }

.steps { padding-left: 22px; max-width: 800px; }
.steps li { margin: 8px 0; }
.faq h3 { font-family: var(--font-display); font-size: 16px; margin: 22px 0 6px; }
.faq p { margin: 0; color: var(--ink-dim); max-width: 800px; }
.crumbs { font-family: var(--font-mono); font-size: 12px; color: var(--ink-dim); margin: 0 0 6px; }
.crumbs a { color: var(--ink-dim); }
.crumbs a:hover { color: var(--cyan); }
.final-cta { margin: 56px 0 8px; padding: 34px 30px; border: 1px solid var(--panel-line); background: linear-gradient(135deg, rgba(122,92,255,.12), rgba(38,229,255,.05)); }
.final-cta .hub-h2 { margin-top: 0; }
.final-cta .btn-secondary { margin-left: 8px; }
.error-page { text-align: center; padding: 60px 0; }
.error-code { font-family: var(--font-mono); font-size: 64px; color: var(--violet); margin: 0; }

/* pie de pagina */
.site-footer { border-top: 1px solid var(--panel-line); margin-top: 60px; padding: 36px 40px 24px; background: var(--bg-raise); }
.site-footer-inner { max-width: 1040px; margin: 0 auto; display: grid; grid-template-columns: 1.4fr 1fr 1fr; gap: 32px; }
.footer-brand { font-family: var(--font-display); font-weight: 800; font-size: 18px; margin: 0 0 8px; }
.footer-brand .lab { background: linear-gradient(90deg, var(--violet), var(--cyan)); -webkit-background-clip: text; background-clip: text; color: transparent; }
.footer-note { color: var(--ink-dim); font-size: 13px; margin: 0; max-width: 300px; }
.footer-h { font-family: var(--font-mono); font-size: 11px; text-transform: uppercase; letter-spacing: .08em; color: var(--ink-dim); margin: 0 0 12px; }
.footer-col ul { list-style: none; margin: 0; padding: 0; }
.footer-col li { margin: 7px 0; }
.footer-col a { color: var(--ink); text-decoration: none; font-size: 14px; }
.footer-legal { max-width: 1040px; margin: 26px auto 0; color: var(--ink-dim); font-size: 12px; }

/* volver arriba + CTA fijo en movil */
.to-top { position: fixed; right: 20px; bottom: 24px; z-index: 80; width: 42px; height: 42px; background: var(--panel); color: var(--cyan); border: 1px solid var(--panel-line); font-size: 18px; cursor: pointer; }
.to-top:hover { border-color: var(--cyan); transform: translateY(-2px); }
.to-top[hidden] { display: none; }
.mobile-cta { display: none; }

@media (max-width: 640px) {
  .nav-toggle { display: flex; }
  .hub-nav { display: none; width: 100%; flex-direction: column; align-items: flex-start; gap: 14px; padding: 10px 0 6px; }
  .hub-nav.open { display: flex; }
  .hero-title { font-size: 30px; }
  .tool-h1 { font-size: 26px; }
  .site-footer { padding: 28px 20px 20px; }
  .site-footer-inner { grid-template-columns: 1fr; gap: 22px; }
  .final-cta { padding: 24px 18px; }
  .final-cta .btn-secondary { margin: 10px 0 0; display: inline-block; }
  .mobile-cta { display: block; position: fixed; left: 0; right: 0; bottom: 0; z-index: 85; padding: 10px 16px calc(10px + env(safe-area-inset-bottom)); background: rgba(11,11,18,.94); backdrop-filter: blur(8px); border-top: 1px solid var(--panel-line); }
  .mobile-cta .btn-primary { display: block; width: 100%; text-align: center; margin: 0; }
  body.has-mobile-cta { padding-bottom: 74px; }
  body.has-mobile-cta .to-top { bottom: 88px; }
  .hero-actions .btn-primary, .hero-actions .btn-secondary { flex: 1 1 auto; text-align: center; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation: none !important; transition: none !important; }
  .js .reveal { opacity: 1; transform: none; }
}


/* selector de idioma EN/ES (barra superior, a la derecha) */
.lang-form { margin: 0 0 0 4px; order: 3; }
.hub-nav { margin-left: auto; }
.lang-switch {
  position: relative; display: grid; grid-template-columns: 1fr 1fr; align-items: center; width: 68px; height: 30px; padding: 0;
  background: var(--bg-raise); border: 1px solid var(--panel-line); border-radius: 999px; cursor: pointer;
  font-family: var(--font-mono); font-size: 11px; font-weight: 700; letter-spacing: .04em; color: var(--ink-dim);
}
.lang-switch:hover { border-color: var(--cyan); }
.lang-opt { position: relative; z-index: 1; text-align: center; line-height: 28px; transition: color .2s ease; }
.lang-knob {
  position: absolute; top: 2px; left: 2px; width: 32px; height: 24px; border-radius: 999px;
  background: linear-gradient(90deg, var(--violet), var(--cyan)); transition: transform .22s cubic-bezier(.2,.7,.2,1);
}
.lang-switch:not(.is-es) .lang-opt:first-child, .lang-switch.is-es .lang-opt:nth-child(2) { color: #0B0B12; }
.lang-switch.is-es .lang-knob { transform: translateX(32px); }
@media (max-width: 640px) {
  .lang-form { order: 2; margin-left: auto; }
  .nav-toggle { order: 3; }
  .hub-nav { order: 4; margin-left: 0; }
}

/* el resplandor decorativo del hero no debe ensanchar la pagina en telefonos */
.hero::before { width: min(520px, 92vw); }
body { overflow-x: clip; }

/* =====================================================================
   Fondo animado 3D (equipo de robots). Es decoracion: sin WebGL, con
   "reducir movimiento", en modo ahorro de datos o en equipos lentos la
   pagina queda con su fondo violeta oscuro y funciona igual.
   ===================================================================== */
.bg3d {
  position: fixed; inset: 0; z-index: -1; pointer-events: none; overflow: hidden; --dim: 0;
  background: radial-gradient(55% 60% at 74% 58%, rgba(122,92,255,.20), rgba(11,11,18,0) 70%), var(--bg);
}
.bg3d canvas { position: absolute; inset: 0; width: 100%; height: 100%; display: block; opacity: 0; transition: opacity 1.4s ease; }
.bg3d.bg3d-on canvas { opacity: 1; }
.bg3d.bg3d-off canvas { display: none; }
.bg3d-scrim {
  position: absolute; inset: 0;
  background:
    linear-gradient(90deg, rgba(11,11,18,.94) 0%, rgba(11,11,18,.84) 36%, rgba(11,11,18,.34) 60%, rgba(11,11,18,.04) 100%),
    linear-gradient(0deg, rgba(11,11,18,.55), rgba(11,11,18,0) 24%);
}
.bg3d-dim { position: absolute; inset: 0; background: rgb(11,11,18); opacity: var(--dim, 0); transition: opacity .25s linear; }

/* que el texto sobre el fondo se lea siempre */
.has-bg3d .hero-title, .has-bg3d .hero-sub, .has-bg3d .hub-h1, .has-bg3d .hub-h2, .has-bg3d .hub-sub,
.has-bg3d .crumbs, .has-bg3d .steps, .has-bg3d .faq h3, .has-bg3d .faq p, .has-bg3d .tool-h1 { text-shadow: 0 2px 18px rgba(11,11,18,.95), 0 0 2px rgba(11,11,18,.9); }
.has-bg3d .tldr { background: rgba(14,14,26,.84); backdrop-filter: blur(6px); }
.has-bg3d .final-cta { background: linear-gradient(135deg, rgba(22,17,48,.92), rgba(14,24,36,.88)); }
.has-bg3d .hero { max-width: 680px; }
.has-bg3d .hero-sub { max-width: 540px; }
.has-bg3d .hero-title { font-size: clamp(30px, 2.6vw, 40px); }
.has-bg3d .tool-hero { max-width: 700px; }
.has-bg3d .tldr { max-width: 640px; }
.has-bg3d .site-footer { background: rgba(18,18,32,.94); }

/* boton para pausar el movimiento (WCAG 2.2.2) */
.bg3d-toggle {
  position: fixed; left: 16px; bottom: 16px; z-index: 80; width: 40px; height: 40px; padding: 0;
  background: rgba(24,24,38,.9); color: var(--ink-dim); border: 1px solid var(--panel-line); cursor: pointer;
  display: grid; place-items: center; transition: color .15s ease, border-color .15s ease;
}
.bg3d-toggle[hidden] { display: none; }
.bg3d-toggle:hover { color: var(--cyan); border-color: var(--cyan); }
.bg3d-toggle svg { width: 16px; height: 16px; fill: currentColor; }
.bg3d-toggle .ico-play { display: none; }
.bg3d-toggle.is-paused .ico-pause { display: none; }
.bg3d-toggle.is-paused .ico-play { display: block; }

@media (max-width: 899px) {
  .has-bg3d .hero, .has-bg3d .tool-hero, .has-bg3d .tldr { max-width: none; }
  .has-bg3d .hero-sub { max-width: none; }
  .has-bg3d .hero-title { font-size: 30px; }
  .has-bg3d .hero, .has-bg3d .tool-hero { padding-bottom: 42vh; }   /* room for the crew under the text */
  .bg3d-scrim { background: linear-gradient(180deg, rgba(11,11,18,.96) 0%, rgba(11,11,18,.9) 40%, rgba(11,11,18,.14) 62%, rgba(11,11,18,0) 100%); }
  body.has-bg3d.has-mobile-cta .bg3d-toggle { bottom: 82px; }
}
@media (prefers-reduced-motion: reduce) { .bg3d canvas { transition: none; } .bg3d-dim { transition: none; } }