/* =========================================================
   INVERSIONES DOBLE DÍGITO S.L. — Hoja de estilos principal
   Sistema de diseño: navy oscuro / blanco roto / gris cálido / bronce
   ========================================================= */

:root {
  /* Paleta */
  --navy: #0a0e17;
  --navy-2: #10141f;
  --navy-3: #161b28;
  --navy-soft: #1c2130;
  --off-white: #f6f4ef;
  --off-white-2: #eeece5;
  --gray: #8b8a85;
  --gray-warm: #a7a49c;
  --gray-line: #d8d5cc;
  --ink: #1b1c1e;
  --gold: #ac8a56;
  --gold-soft: #c7ab7c;
  --gold-line: rgba(172, 138, 86, 0.35);

  /* Tipografía */
  --font-serif: Georgia, "Iowan Old Style", "Palatino Linotype", "Book Antiqua", serif;
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;

  /* Espaciado */
  --gap-xs: 0.5rem;
  --gap-sm: 1rem;
  --gap-md: 2rem;
  --gap-lg: 4rem;
  --gap-xl: 7rem;

  /* Layout */
  --max-width: 1240px;
  --border-radius: 2px;

  /* Transiciones */
  --ease: cubic-bezier(0.4, 0, 0.2, 1);
  --speed-fast: 180ms;
  --speed-mid: 400ms;
  --speed-slow: 800ms;
}

/* ---------- Reset ---------- */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

body, h1, h2, h3, h4, p, figure, blockquote, dl, dd, ul, ol {
  margin: 0;
}
ul, ol { padding: 0; list-style: none; }
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
button { font: inherit; color: inherit; background: none; border: 0; cursor: pointer; }
input, textarea, select { font: inherit; }

html, body { height: 100%; }
body {
  background: var(--off-white);
  color: var(--ink);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 1.5rem;
}
@media (min-width: 768px) {
  .container { padding: 0 2.5rem; }
}

main { display: block; }

/* ---------- Tipografía general ---------- */
h1, h2, h3, h4 {
  font-family: var(--font-serif);
  font-weight: 400;
  color: var(--navy);
  line-height: 1.15;
  letter-spacing: 0.01em;
}
h1 { font-size: clamp(2.2rem, 5vw, 4rem); }
h2 { font-size: clamp(1.8rem, 3.4vw, 2.7rem); }
h3 { font-size: clamp(1.3rem, 2.2vw, 1.6rem); }
h4 { font-size: 1.1rem; }

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  font-family: var(--font-sans);
  font-size: 0.75rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--gold);
  font-weight: 600;
  margin-bottom: 1rem;
}
.eyebrow::before {
  content: "";
  display: inline-block;
  width: 28px;
  height: 1px;
  background: var(--gold);
}

.lede {
  font-size: 1.15rem;
  color: var(--gray);
  max-width: 46ch;
}

.section-head {
  max-width: 720px;
  margin-bottom: var(--gap-lg);
}
.section-head.center { margin-left: auto; margin-right: auto; text-align: center; }

/* ---------- Botones ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.95rem 1.9rem;
  font-size: 0.85rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  font-weight: 600;
  border: 1px solid transparent;
  transition: background var(--speed-fast) var(--ease), color var(--speed-fast) var(--ease), border-color var(--speed-fast) var(--ease), transform var(--speed-fast) var(--ease);
  white-space: nowrap;
}
.btn:active { transform: translateY(1px); }

.btn-primary {
  background: var(--gold);
  color: var(--navy);
  border-color: var(--gold);
}
.btn-primary:hover { background: var(--gold-soft); border-color: var(--gold-soft); }

.btn-outline-light {
  background: transparent;
  color: var(--off-white);
  border-color: rgba(246, 244, 239, 0.4);
}
.btn-outline-light:hover { border-color: var(--off-white); background: rgba(246, 244, 239, 0.08); }

.btn-outline-dark {
  background: transparent;
  color: var(--navy);
  border-color: rgba(10, 14, 23, 0.3);
}
.btn-outline-dark:hover { border-color: var(--navy); background: rgba(10, 14, 23, 0.05); }

.btn-arrow {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.85rem;
  letter-spacing: 0.04em;
  font-weight: 600;
  color: var(--navy);
  border-bottom: 1px solid var(--gold-line);
  padding-bottom: 3px;
  transition: border-color var(--speed-fast) var(--ease), gap var(--speed-fast) var(--ease);
}
.btn-arrow:hover { border-color: var(--gold); gap: 0.8rem; }
.btn-arrow.on-dark { color: var(--off-white); }

/* ---------- Header ---------- */
.site-header {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  padding: 1.4rem 0;
  background: transparent;
  transition: background var(--speed-mid) var(--ease), padding var(--speed-mid) var(--ease), box-shadow var(--speed-mid) var(--ease), border-color var(--speed-mid) var(--ease);
  border-bottom: 1px solid transparent;
}
.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.site-header.is-scrolled,
.site-header.is-solid {
  background: rgba(10, 14, 23, 0.92);
  backdrop-filter: blur(8px);
  padding: 0.9rem 0;
  border-bottom-color: rgba(255,255,255,0.06);
}

.brand {
  display: flex;
  flex-direction: column;
  line-height: 1;
}
.brand-mark {
  font-family: var(--font-serif);
  font-size: 1.25rem;
  letter-spacing: 0.03em;
  color: var(--off-white);
}
.brand-mark strong { color: var(--gold-soft); font-weight: 400; }
.brand-sub {
  font-size: 0.6rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--gray-warm);
  margin-top: 0.3rem;
}

.main-nav { display: none; }
@media (min-width: 960px) {
  .main-nav {
    display: flex;
    align-items: center;
    gap: 2.4rem;
  }
  .main-nav a {
    font-size: 0.82rem;
    letter-spacing: 0.05em;
    text-transform: uppercase;
    color: var(--off-white-2);
    position: relative;
    padding-bottom: 4px;
  }
  .main-nav a::after {
    content: "";
    position: absolute;
    left: 0; bottom: 0;
    width: 0;
    height: 1px;
    background: var(--gold);
    transition: width var(--speed-fast) var(--ease);
  }
  .main-nav a:hover::after,
  .main-nav a[aria-current="page"]::after { width: 100%; }
  .main-nav a[aria-current="page"] { color: var(--gold-soft); }
}

.nav-actions { display: flex; align-items: center; gap: 1rem; }
.nav-cta { display: none; }
@media (min-width: 960px) { .nav-cta { display: inline-flex; } }

.nav-toggle {
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 34px;
  height: 34px;
  align-items: center;
}
@media (min-width: 960px) { .nav-toggle { display: none; } }
.nav-toggle span {
  display: block;
  width: 22px;
  height: 1px;
  background: var(--off-white);
  transition: transform var(--speed-fast) var(--ease), opacity var(--speed-fast) var(--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); }

.mobile-nav {
  position: fixed;
  inset: 0;
  background: var(--navy);
  z-index: 90;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 2rem 1.5rem;
  opacity: 0;
  visibility: hidden;
  transform: translateY(-8px);
  transition: opacity var(--speed-mid) var(--ease), transform var(--speed-mid) var(--ease), visibility 0s linear var(--speed-mid);
}
.mobile-nav.is-open {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
  transition: opacity var(--speed-mid) var(--ease), transform var(--speed-mid) var(--ease), visibility 0s;
}
.mobile-nav ul { display: flex; flex-direction: column; gap: 1.6rem; }
.mobile-nav a {
  font-family: var(--font-serif);
  font-size: 2rem;
  color: var(--off-white);
}
.mobile-nav .mobile-nav-foot {
  margin-top: 3rem;
  padding-top: 2rem;
  border-top: 1px solid rgba(255,255,255,0.1);
  display: flex;
  flex-direction: column;
  gap: 1rem;
}
.mobile-nav .mobile-nav-foot a { font-family: var(--font-sans); font-size: 0.95rem; color: var(--gray-warm); }
body.nav-open { overflow: hidden; }

/* ---------- Hero ---------- */
.hero {
  position: relative;
  min-height: 92vh;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  color: var(--off-white);
  background: linear-gradient(180deg, var(--navy) 0%, var(--navy-2) 55%, var(--navy-3) 100%);
  overflow: hidden;
}
.hero-art {
  position: absolute;
  inset: 0;
  z-index: 0;
  opacity: 0.9;
}
.hero-art svg { width: 100%; height: 100%; object-fit: cover; }
.hero::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(10,14,23,0.15) 0%, rgba(10,14,23,0.55) 70%, rgba(10,14,23,0.92) 100%);
  z-index: 1;
}
.hero-content {
  position: relative;
  z-index: 2;
  padding: 8rem 0 4.5rem;
  width: 100%;
}
.hero h1 {
  color: var(--off-white);
  max-width: 16ch;
  margin-bottom: 1.5rem;
}
.hero .lede { color: var(--gray-warm); font-size: 1.2rem; max-width: 52ch; margin-bottom: 2.5rem; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 1rem; }
.hero-note {
  position: relative;
  z-index: 2;
  padding: 0 0 2rem;
  font-size: 0.72rem;
  letter-spacing: 0.05em;
  color: rgba(246, 244, 239, 0.35);
}

/* ---------- Secciones genéricas ---------- */
.section { padding: var(--gap-xl) 0; }
.section-sm { padding: var(--gap-lg) 0; }
.section-dark { background: var(--navy); color: var(--off-white); }
.section-dark h2, .section-dark h3 { color: var(--off-white); }
.section-dark .lede { color: var(--gray-warm); }
.section-tint { background: var(--off-white-2); }

.divider {
  width: 100%;
  height: 1px;
  background: var(--gray-line);
  border: 0;
  margin: 0;
}
.section-dark .divider, .divider-dark { background: rgba(255,255,255,0.1); }

/* ---------- Grid utilidades ---------- */
.grid { display: grid; gap: var(--gap-md); }
.grid-2 { grid-template-columns: 1fr; }
.grid-3 { grid-template-columns: 1fr; }
.grid-4 { grid-template-columns: 1fr; }
@media (min-width: 700px) {
  .grid-2 { grid-template-columns: repeat(2, 1fr); }
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
}
@media (min-width: 960px) {
  .grid-3 { grid-template-columns: repeat(3, 1fr); }
  .grid-4 { grid-template-columns: repeat(4, 1fr); }
}

/* ---------- Intro ---------- */
.intro-layout {
  display: grid;
  gap: var(--gap-lg);
}
@media (min-width: 900px) {
  .intro-layout { grid-template-columns: 0.9fr 1.1fr; align-items: start; }
}
.intro-figures {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  background: var(--gray-line);
  margin-top: 2.5rem;
}
.intro-figure {
  background: var(--off-white);
  padding: 1.6rem 1.2rem;
}
.intro-figure .tag {
  font-size: 0.68rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--gold);
  font-weight: 600;
}
.intro-figure p { margin-top: 0.5rem; font-size: 0.9rem; color: var(--gray); }

/* ---------- Tarjetas de estrategia ---------- */
.strategy-card {
  border: 1px solid var(--gray-line);
  padding: 2.2rem 1.8rem;
  background: var(--off-white);
  position: relative;
  transition: transform var(--speed-mid) var(--ease), box-shadow var(--speed-mid) var(--ease), border-color var(--speed-fast) var(--ease);
}
.strategy-card:hover {
  transform: translateY(-6px);
  border-color: var(--gold-line);
  box-shadow: 0 24px 48px -28px rgba(10,14,23,0.35);
}
.strategy-card .num {
  font-family: var(--font-serif);
  font-size: 0.85rem;
  color: var(--gold);
  letter-spacing: 0.08em;
}
.strategy-card h3 { margin: 0.9rem 0 0.7rem; }
.strategy-card p { color: var(--gray); font-size: 0.95rem; }
.strategy-card .icon { margin-bottom: 1.2rem; color: var(--gold); }

/* ---------- Proceso ---------- */
.process-list { display: flex; flex-direction: column; }
.process-item {
  display: grid;
  grid-template-columns: 70px 1fr;
  gap: 1.5rem;
  padding: 2.2rem 0;
  border-bottom: 1px solid rgba(255,255,255,0.1);
}
.process-item:first-child { border-top: 1px solid rgba(255,255,255,0.1); }
@media (min-width: 700px) {
  .process-item { grid-template-columns: 110px 1fr 1.4fr; align-items: baseline; }
}
.process-item .step-num {
  font-family: var(--font-serif);
  font-size: 1.8rem;
  color: var(--gold-soft);
}
.process-item h3 { margin-bottom: 0.5rem; }
.process-item p { color: var(--gray-warm); font-size: 0.95rem; max-width: 56ch; }

/* ---------- Tarjetas de operaciones ---------- */
.op-card {
  border: 1px solid var(--gray-line);
  background: var(--off-white);
  overflow: hidden;
  transition: box-shadow var(--speed-mid) var(--ease), transform var(--speed-mid) var(--ease);
  display: flex;
  flex-direction: column;
}
.op-card:hover { transform: translateY(-4px); box-shadow: 0 24px 48px -30px rgba(10,14,23,0.35); }
.op-card-media {
  aspect-ratio: 4 / 3;
  background: var(--navy);
  position: relative;
  overflow: hidden;
}
.op-card-media svg { width: 100%; height: 100%; }
.op-card-status {
  position: absolute;
  top: 0.9rem; left: 0.9rem;
  font-size: 0.65rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  background: rgba(10,14,23,0.75);
  color: var(--gold-soft);
  padding: 0.35rem 0.7rem;
  border: 1px solid var(--gold-line);
}
.op-card-body { padding: 1.6rem 1.5rem 1.8rem; flex: 1; display: flex; flex-direction: column; }
.op-card-tag { font-size: 0.68rem; letter-spacing: 0.12em; text-transform: uppercase; color: var(--gold); font-weight: 600; margin-bottom: 0.6rem; }
.op-card h3 { font-size: 1.25rem; margin-bottom: 0.3rem; }
.op-card .loc { font-size: 0.85rem; color: var(--gray); margin-bottom: 1.1rem; }
.op-data { display: grid; grid-template-columns: 1fr 1fr; gap: 0.7rem 1rem; margin-bottom: 1.3rem; }
.op-data dt { font-size: 0.65rem; letter-spacing: 0.08em; text-transform: uppercase; color: var(--gray); }
.op-data dd { font-size: 0.92rem; color: var(--ink); margin: 0.15rem 0 0; }
.op-data dd.placeholder { color: var(--gray); font-style: italic; }
.op-card-foot { margin-top: auto; }

.filter-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 0.7rem;
  margin-bottom: var(--gap-lg);
}
.filter-btn {
  padding: 0.6rem 1.2rem;
  border: 1px solid var(--gray-line);
  font-size: 0.78rem;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--gray);
  transition: all var(--speed-fast) var(--ease);
}
.filter-btn:hover { border-color: var(--gold); color: var(--navy); }
.filter-btn.is-active { background: var(--navy); color: var(--off-white); border-color: var(--navy); }

/* ---------- Placeholder visual (sustituir por fotografía real) ---------- */
.placeholder-note {
  font-size: 0.68rem;
  letter-spacing: 0.04em;
  color: var(--gray);
  background: var(--off-white-2);
  border: 1px dashed var(--gray-line);
  padding: 0.5rem 0.8rem;
  margin-top: 0.6rem;
}

/* ---------- Bloque editorial con imagen ---------- */
.editorial {
  display: grid;
  gap: var(--gap-lg);
  align-items: center;
}
@media (min-width: 900px) {
  .editorial { grid-template-columns: 1fr 1fr; }
  .editorial.reverse .editorial-media { order: 2; }
}
.editorial-media {
  aspect-ratio: 5 / 4;
  background: var(--navy);
  overflow: hidden;
  position: relative;
}
.editorial-media svg { width: 100%; height: 100%; }

/* ---------- CTA banda ---------- */
.cta-band {
  background: var(--navy);
  color: var(--off-white);
  padding: var(--gap-xl) 0;
  position: relative;
  overflow: hidden;
}
.cta-band-inner { display: grid; gap: var(--gap-md); align-items: center; }
@media (min-width: 900px) { .cta-band-inner { grid-template-columns: 1.3fr 1fr; } }
.cta-band h2 { color: var(--off-white); }
.cta-actions { display: flex; flex-wrap: wrap; gap: 1rem; }

/* ---------- Formularios de contacto (mailto) ---------- */
.contact-grid { display: grid; gap: 1.5rem; }
@media (min-width: 760px) { .contact-grid { grid-template-columns: repeat(3, 1fr); } }
.contact-card {
  border: 1px solid var(--gray-line);
  padding: 2.2rem 1.8rem;
  background: var(--off-white);
  display: flex;
  flex-direction: column;
  gap: 1rem;
  transition: border-color var(--speed-fast) var(--ease), transform var(--speed-mid) var(--ease);
}
.contact-card:hover { border-color: var(--gold-line); transform: translateY(-4px); }
.contact-card h3 { font-size: 1.2rem; }
.contact-card p { color: var(--gray); font-size: 0.92rem; flex: 1; }

/* ---------- Footer ---------- */
.site-footer { background: var(--navy); color: var(--gray-warm); padding: var(--gap-lg) 0 var(--gap-sm); }
.footer-top {
  display: grid;
  gap: var(--gap-lg);
  padding-bottom: var(--gap-lg);
  border-bottom: 1px solid rgba(255,255,255,0.08);
}
@media (min-width: 800px) { .footer-top { grid-template-columns: 1.4fr 1fr 1fr; } }
.footer-brand .brand-mark { margin-bottom: 0.8rem; }
.footer-brand p { max-width: 40ch; font-size: 0.9rem; }
.footer-col h4 { color: var(--off-white); font-size: 0.78rem; letter-spacing: 0.1em; text-transform: uppercase; margin-bottom: 1.1rem; font-family: var(--font-sans); }
.footer-col ul { display: flex; flex-direction: column; gap: 0.7rem; }
.footer-col a { font-size: 0.9rem; transition: color var(--speed-fast) var(--ease); }
.footer-col a:hover { color: var(--gold-soft); }
.footer-bottom {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  justify-content: space-between;
  padding-top: var(--gap-sm);
  font-size: 0.78rem;
  color: rgba(255,255,255,0.35);
}
.footer-bottom a { color: rgba(255,255,255,0.5); }
.footer-bottom a:hover { color: var(--gold-soft); }

/* ---------- Breadcrumb / page hero interior ---------- */
.page-hero {
  background: var(--navy);
  color: var(--off-white);
  padding: 9.5rem 0 4rem;
}
.page-hero .eyebrow { color: var(--gold-soft); }
.page-hero h1 { color: var(--off-white); max-width: 20ch; }
.page-hero .lede { color: var(--gray-warm); margin-top: 1.2rem; }

/* ---------- Scroll reveal ---------- */
[data-reveal] {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 700ms var(--ease), transform 700ms var(--ease);
}
[data-reveal].is-visible { opacity: 1; transform: translateY(0); }

/* ---------- Tablas de contenido legal ---------- */
.legal-content h2 { margin-top: 2.4rem; margin-bottom: 0.9rem; font-size: 1.3rem; }
.legal-content p, .legal-content li { color: var(--gray); font-size: 0.96rem; margin-bottom: 0.9rem; }
.legal-content ul { list-style: disc; padding-left: 1.4rem; }
.legal-content strong { color: var(--ink); }

/* ---------- Utilidades ---------- */
.mt-sm { margin-top: var(--gap-sm); }
.mt-md { margin-top: var(--gap-md); }
.mt-lg { margin-top: var(--gap-lg); }
.text-gray { color: var(--gray); }
.center { text-align: center; }
.skip-link {
  position: absolute;
  left: -999px;
  top: 0;
  background: var(--gold);
  color: var(--navy);
  padding: 0.8rem 1.2rem;
  z-index: 999;
  font-size: 0.85rem;
  font-weight: 600;
}
.skip-link:focus { left: 1rem; top: 1rem; }

:focus-visible { outline: 2px solid var(--gold); outline-offset: 2px; }

/* ---------- 404 ---------- */
.error-page {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--navy);
  color: var(--off-white);
  text-align: center;
  padding: 2rem;
}
.error-page h1 { color: var(--off-white); font-size: clamp(4rem, 12vw, 8rem); }
.error-page p { color: var(--gray-warm); margin: 1rem 0 2rem; }