:root {
    --brand-dark: #23405A;
    --brand: #3A5371;
    --brand-mid: #59748E;
    --brand-light: #7189A0;
    --steel: #8C97A3;
    --concrete: #E9E7E1;
    --concrete-line: #CDD1D6;
    --gold: #C98A2B;
    --paper: #FFFFFF;
    --white: #FFFFFF;
    --font-head: 'Space Grotesk', sans-serif;
    --font-body: 'IBM Plex Sans', sans-serif;
    --font-mono: 'IBM Plex Mono', monospace;
    box-sizing: border-box;
    padding-top: env(safe-area-inset-top, 0px);
    padding-bottom: env(safe-area-inset-bottom, 0px);
  }
  :root:not([data-theme="light"]) {
    --bg: var(--paper);
    --fg: var(--brand-dark);
    --panel: var(--white);
    --panel-line: var(--concrete-line);
  }
  @media (prefers-color-scheme: dark) {
    :root:not([data-theme="light"]) {
      --bg: #10161F;
      --fg: #E7EAED;
      --panel: #17202C;
      --panel-line: #2A3646;
      --concrete: #1B2431;
      --concrete-line: #2A3646;
    }
  }
  :root[data-theme="dark"] {
    --bg: #10161F; --fg: #E7EAED; --panel: #17202C; --panel-line: #2A3646; --concrete: #1B2431; --concrete-line: #2A3646;
  }
  html { font-size: 18px; scroll-padding-top: 112px; scroll-behavior: smooth; }
  * { box-sizing: border-box; }
  @view-transition { navigation: auto; }
  ::view-transition-old(root), ::view-transition-new(root) { animation-duration: 0.32s; }
  body {
    margin: 0; background: var(--bg); color: var(--fg);
    font-family: var(--font-body); font-size: 1rem; line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    animation: page-fade-in 0.45s ease both;
  }
  @keyframes page-fade-in { from { opacity: 0; transform: translateY(6px); } to { opacity: 1; transform: translateY(0); } }
  a { color: inherit; }
  img, svg { max-width: 100%; display: block; }
  .wrap { max-width: 1180px; margin: 0 auto; padding: 0 28px; }

  /* ---------- HEADER ---------- */
  header {
    position: sticky; top: env(safe-area-inset-top, 0px); z-index: 30;
    background: color-mix(in srgb, var(--bg) 92%, transparent);
    backdrop-filter: blur(6px);
    border-bottom: 1px solid var(--panel-line);
  }
  .nav-inner {
    display: flex; align-items: center; justify-content: space-between;
    padding: 12px 28px; max-width: 1180px; margin: 0 auto;
  }
  .logo-mark { height: 68px; width: auto; }
  .logo-wrap { display: flex; align-items: center; gap: 16px; text-decoration: none; }
  .logo-tagline {
    font-family: var(--font-body); font-size: 0.72rem; line-height: 1.5; color: var(--steel);
    border-left: 1px solid var(--panel-line); padding-left: 16px; white-space: nowrap;
  }
  :root[data-theme="light"] .logo-tagline { color: var(--brand-dark); }
  @media (max-width: 1200px) { .logo-tagline { display: none; } }
  nav ul { list-style: none; display: flex; gap: 30px; margin: 0; padding: 0; }
  nav a {
    text-decoration: none; font-size: 0.9rem; color: var(--fg); opacity: 0.75;
    transition: opacity 0.15s ease; position: relative; padding: 4px 0;
  }
  nav a:hover, nav a.active { opacity: 1; }
  nav a.active::after {
    content: ""; position: absolute; left: 0; right: 0; bottom: -2px; height: 2px; background: var(--gold);
  }
  .nav-cta {
    border: 1px solid var(--fg); padding: 9px 18px; font-size: 0.85rem;
    text-decoration: none; color: var(--fg); white-space: nowrap;
  }
  .nav-cta:hover { background: var(--fg); color: var(--bg); }
  .theme-toggle {
    background: none; border: 1px solid var(--panel-line); color: var(--fg);
    width: 38px; height: 38px; font-size: 1rem; cursor: pointer; line-height: 1;
  }
  .theme-toggle:hover { border-color: var(--fg); }
  .burger { display: none; background: none; border: 1px solid var(--panel-line); padding: 8px 10px; font-family: var(--font-mono); font-size: 0.75rem; color: var(--fg); }
  @media (max-width: 980px) {
    nav ul { display: none; }
    .nav-cta { display: none; }
    .burger { display: block; }
    .logo-mark { height: 56px; }
  }
  @media (max-width: 480px) { .logo-mark { height: 48px; } }
  #mobile-menu { display: none; border-bottom: 1px solid var(--panel-line); background: var(--bg); }
  #mobile-menu.open { display: block; }
  #mobile-menu ul { list-style: none; margin: 0; padding: 14px 28px 20px; display: grid; gap: 14px; }
  #mobile-menu a { text-decoration: none; color: var(--fg); font-size: 0.95rem; }

  /* ---------- HERO ---------- */
  .hero {
    position: relative; padding: 60px 0 56px;
    background-image: linear-gradient(var(--panel-line) 1px, transparent 1px), linear-gradient(90deg, var(--panel-line) 1px, transparent 1px);
    background-size: 44px 44px; background-position: center top;
    border-bottom: 1px solid var(--panel-line); overflow: hidden;
  }
  .hero::before {
    content: ""; position: absolute; inset: 0;
    background: radial-gradient(ellipse 70% 55% at 25% 15%, var(--bg) 10%, transparent 75%);
  }
  .hero-grid { position: relative; }
  .hero-tag { font-family: var(--font-mono); font-size: 0.7rem; letter-spacing: 0.05em; color: var(--gold); margin-bottom: 16px; }
  h1 {
    font-family: var(--font-head); font-weight: 600; font-size: clamp(2.3rem, 5vw, 4rem);
    line-height: 1.08; margin: 0 0 22px; letter-spacing: -0.01em; max-width: none;
  }
  .hero p.lede { font-size: 1.15rem; opacity: 0.82; max-width: 62ch; margin: 0 0 28px; }
  .hero-actions { display: flex; gap: 14px; flex-wrap: wrap; margin-bottom: 40px; }
  .btn-primary {
    background: var(--brand-dark); color: var(--paper); padding: 13px 26px; text-decoration: none;
    font-size: 0.94rem; font-weight: 500; border: 1px solid var(--brand-dark); cursor: pointer;
  }
  :root[data-theme="dark"] .btn-primary, @media (prefers-color-scheme: dark) { }
  .btn-secondary { padding: 13px 26px; text-decoration: none; font-size: 0.94rem; border: 1px solid var(--panel-line); color: var(--fg); }
  /* ---------- HERO SLIDESHOW ---------- */
  .hero-slideshow-section { border-bottom: 1px solid var(--panel-line); }
  .hero-slideshow { position: relative; width: 100%; aspect-ratio: 16/7; overflow: hidden; background: var(--concrete); }
  @media (max-width: 780px) { .hero-slideshow { aspect-ratio: 3/4; } }
  .hero-slideshow .slides { position: absolute; inset: 0; }
  .hero-slideshow .slide {
    position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover;
    opacity: 0; transition: opacity 1.4s ease;
  }
  .hero-slideshow .slide.is-active { opacity: 1; }

  .slideshow-scrim {
    position: absolute; inset: 0; z-index: 1; pointer-events: none;
    background:
      radial-gradient(ellipse 70% 60% at 50% 50%, rgba(6,10,16,0.32), rgba(6,10,16,0.58) 75%),
      linear-gradient(180deg, rgba(6,10,16,0.45), rgba(6,10,16,0.3) 35%, rgba(6,10,16,0.55));
  }

  .stat-row-overlay {
    position: absolute; inset: 0; z-index: 2;
    display: flex; align-items: center; justify-content: center;
    gap: clamp(32px, 6vw, 90px); padding: 20px; flex-wrap: wrap; text-align: center;
  }
  .stat-row-overlay .stat b {
    display: block; font-family: var(--font-head); font-weight: 700; color: #fff;
    font-size: clamp(2.8rem, 7vw, 5.6rem); line-height: 1; letter-spacing: -0.01em;
    text-shadow: 0 4px 24px rgba(0,0,0,0.45);
  }
  .stat-row-overlay .stat span {
    display: block; margin-top: 10px; font-size: clamp(0.8rem, 1.3vw, 1rem);
    color: rgba(255,255,255,0.88); text-shadow: 0 2px 10px rgba(0,0,0,0.5);
  }
  @media (max-width: 780px) { .stat-row-overlay { gap: 30px 50px; } }

  .hero-slideshow .slide-cap {
    position: absolute; left: 0; right: 0; bottom: 0; z-index: 2; padding: 16px 28px;
    background: linear-gradient(transparent, rgba(0,0,0,0.55));
    font-family: var(--font-mono); font-size: 0.72rem; color: #fff; letter-spacing: 0.03em;
  }

  /* ---------- SECTIONS ---------- */
  .section { padding: 64px 0; border-bottom: 1px solid var(--panel-line); }
  .section-head { margin-bottom: 40px; }
  .section-head .idx { font-family: var(--font-mono); font-size: 0.68rem; color: var(--gold); margin-bottom: 10px; display: block; }
  h2 { font-family: var(--font-head); font-weight: 600; font-size: clamp(1.8rem, 3.4vw, 2.6rem); margin: 0 0 14px; max-width: none; }
  .section-head p { max-width: 65ch; color: var(--steel); font-size: 1.05rem; margin: 0; }

  /* ---------- ABOUT ---------- */
  .about-grid p { font-size: 1.08rem; opacity: 0.85; margin: 0 0 18px; max-width: 75ch; }
  .capability-bullets { list-style: disc; margin: 32px 0 0; padding-left: 24px; columns: 2; column-gap: 40px; }
  @media (max-width: 700px) { .capability-bullets { columns: 1; } }
  .capability-bullets li { padding: 8px 0; font-size: 1.02rem; break-inside: avoid; }

  .mv-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 1px; background: var(--panel-line); border: 1px solid var(--panel-line); margin-bottom: 50px; }
  @media (max-width: 780px) { .mv-grid { grid-template-columns: 1fr; } }
  .mv-card { background: var(--panel); padding: 30px 28px; }
  .mv-card .idx { display: block; }
  .mv-card p { font-size: 1rem; opacity: 0.85; margin: 0; }

  .objectives-head { margin-bottom: 22px; }
  .objectives-list { list-style: none; margin: 0 0 50px; padding: 0; columns: 2; column-gap: 40px; }
  @media (max-width: 780px) { .objectives-list { columns: 1; } }
  .objectives-list li {
    position: relative; padding: 10px 0 10px 26px; font-size: 1rem; opacity: 0.88; break-inside: avoid;
    border-top: 1px solid var(--panel-line);
  }
  .objectives-list li::before {
    content: "→"; position: absolute; left: 0; top: 10px; color: var(--gold); font-family: var(--font-mono);
  }

  .commitment-block {
    border-left: 2px solid var(--gold); padding: 4px 0 4px 26px; margin: 0 0 50px; max-width: 80ch;
  }
  .commitment-block p { font-size: 1.08rem; opacity: 0.85; margin: 0; }
  .client-strip {
    margin-top: 46px; border-top: 1px solid var(--panel-line); border-bottom: 1px solid var(--panel-line);
    padding: 26px 0;
  }
  .client-strip .label { font-family: var(--font-mono); font-size: 0.68rem; color: var(--steel); letter-spacing: 0.04em; margin-bottom: 16px; display:block; }
  .marquee {
    overflow: hidden; position: relative;
    -webkit-mask-image: linear-gradient(90deg, transparent, #000 8%, #000 92%, transparent);
    mask-image: linear-gradient(90deg, transparent, #000 8%, #000 92%, transparent);
  }
  .marquee-track { display: flex; gap: 10px; width: max-content; animation: marquee-scroll 24s linear infinite; }
  .marquee:hover .marquee-track { animation-play-state: paused; }
  .marquee-track span {
    border: 1px solid var(--panel-line); padding: 7px 14px; font-size: 0.82rem; color: var(--steel); white-space: nowrap;
  }
  @keyframes marquee-scroll { from { transform: translateX(0); } to { transform: translateX(-50%); } }

  /* ---------- SERVICES ---------- */
  .services-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1px; background: var(--panel-line); border: 1px solid var(--panel-line); }
  @media (max-width: 900px) { .services-grid { grid-template-columns: 1fr 1fr; } }
  @media (max-width: 600px) { .services-grid { grid-template-columns: 1fr; } }
  .service-card { background: var(--panel); padding: 28px 24px; }
  .service-card .num { font-family: var(--font-mono); font-size: 0.7rem; color: var(--gold); display: block; margin-bottom: 18px; }
  .service-card h3 { font-family: var(--font-head); font-size: 1.08rem; font-weight: 600; margin: 0 0 8px; }
  .service-card p { font-size: 0.88rem; color: var(--steel); margin: 0; }

  /* ---------- PROJECTS / GALLERY ---------- */
  .filters { display: flex; flex-wrap: wrap; gap: 10px; margin-bottom: 34px; }
  .filter-btn {
    font-family: var(--font-mono); font-size: 0.74rem; letter-spacing: 0.02em;
    border: 1px solid var(--panel-line); background: transparent; color: var(--fg);
    padding: 9px 16px; cursor: pointer; opacity: 0.72; transition: all .15s ease;
  }
  .filter-btn:hover { opacity: 1; }
  .filter-btn.active { background: var(--brand-dark); color: var(--paper); border-color: var(--brand-dark); opacity: 1; }
  .project-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
  @media (max-width: 900px) { .project-grid { grid-template-columns: 1fr 1fr; } }
  @media (max-width: 620px) { .project-grid { grid-template-columns: 1fr; } }
  .project-card {
    border: 1px solid var(--panel-line); background: var(--panel); overflow: hidden;
    cursor: pointer; transition: transform .18s ease, box-shadow .18s ease;
  }
  .project-card:hover { transform: translateY(-3px); }
  .project-card .thumb { aspect-ratio: 4/3; overflow: hidden; position: relative; background: var(--concrete); }
  .project-card .thumb img { width: 100%; height: 100%; object-fit: cover; transition: transform .4s ease; }
  .project-card .thumb img.rotating-img { transition: transform .4s ease, opacity .4s ease; }
  .project-card:hover .thumb img { transform: scale(1.05); }
  .project-card .thumb .tag {
    position: absolute; top: 10px; left: 10px; background: rgba(16,22,31,0.75); color: #fff;
    font-family: var(--font-mono); font-size: 0.62rem; padding: 4px 9px; letter-spacing: 0.03em;
  }
  .project-card .body { padding: 18px 18px 20px; }
  .project-card .pid { font-family: var(--font-mono); font-size: 0.7rem; color: var(--gold); display: block; margin-bottom: 8px; }
  .project-card h3 { font-family: var(--font-head); font-size: 1rem; font-weight: 600; margin: 0 0 6px; }
  .project-card p { font-size: 0.84rem; color: var(--steel); margin: 0; }
  .project-card .meta { display: flex; justify-content: space-between; margin-top: 12px; font-size: 0.78rem; color: var(--steel); border-top: 1px solid var(--panel-line); padding-top: 10px; }
  .hidden-card { display: none !important; }

  /* Lightbox */
  #lightbox {
    display: none; position: fixed; inset: 0; z-index: 100; background: rgba(10,14,20,0.92);
    padding: 40px 20px; overflow-y: auto;
  }
  #lightbox.open { display: block; }
  .lb-inner { max-width: 760px; margin: 0 auto; background: var(--panel); border: 1px solid var(--panel-line); }
  .lb-inner img { width: 100%; aspect-ratio: 16/10; object-fit: cover; }
  .lb-body { padding: 26px 28px 30px; }
  .lb-close {
    position: sticky; top: 0; float: right; background: var(--brand-dark); color: #fff; border: none;
    width: 34px; height: 34px; cursor: pointer; font-size: 1rem; margin: 14px 14px 0 0;
  }
  .lb-pid { font-family: var(--font-mono); font-size: 0.72rem; color: var(--gold); display: block; margin-bottom: 10px; }
  .lb-body h3 { font-family: var(--font-head); font-size: 1.3rem; margin: 0 0 12px; }
  .lb-body p { font-size: 0.95rem; color: var(--steel); margin: 0 0 18px; }
  .lb-stats { display: flex; gap: 28px; flex-wrap: wrap; border-top: 1px solid var(--panel-line); padding-top: 16px; }
  .lb-stats div b { display: block; font-family: var(--font-head); font-size: 1.05rem; }
  .lb-stats div span { font-size: 0.72rem; color: var(--steel); }

  /* ---------- CONTACT ---------- */
  .contact-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 50px; }
  @media (max-width: 820px) { .contact-grid { grid-template-columns: 1fr; } }
  .contact-info .row { border-top: 1px solid var(--panel-line); padding: 16px 0; }
  .contact-info .row:last-child { border-bottom: 1px solid var(--panel-line); }
  .contact-info .row span.k { font-family: var(--font-mono); font-size: 0.68rem; color: var(--steel); display: block; margin-bottom: 4px; }
  .contact-info .row a, .contact-info .row div.v, .contact-info .row address.v { font-size: 1rem; text-decoration: none; }
  .contact-info .row address.v { font-style: normal; line-height: 1.5; }
  .contact-info .row a.map-link { display: inline-block; margin-top: 8px; font-size: 0.85rem; color: var(--gold); text-decoration: underline; text-underline-offset: 3px; }
  .contact-info .row a.map-link:hover { color: var(--fg); }
  form.contact-form { display: grid; gap: 14px; }
  .contact-form label { font-size: 0.78rem; color: var(--steel); font-family: var(--font-mono); margin-bottom: 4px; display: block; }
  .contact-form input, .contact-form textarea {
    width: 100%; background: var(--panel); border: 1px solid var(--panel-line); color: var(--fg);
    padding: 12px 14px; font-family: var(--font-body); font-size: 0.95rem;
  }
  .contact-form textarea { min-height: 110px; resize: vertical; }
  .contact-form button {
    background: var(--brand-dark); color: var(--paper); border: 1px solid var(--brand-dark);
    padding: 13px 26px; font-size: 0.95rem; cursor: pointer; justify-self: start;
  }
  .form-note { font-size: 0.78rem; color: var(--steel); margin-top: -4px; }
  .contact-form button:disabled { opacity: 0.6; cursor: wait; }
  .hp-field { position: absolute; left: -9999px; width: 1px; height: 1px; opacity: 0; pointer-events: none; }
  #form-status { font-size: 0.95rem; margin-top: 6px; min-height: 1.4em; }
  #form-status.is-success { color: #2E7D4F; }
  #form-status.is-error { color: #B3402E; }
  :root[data-theme="dark"] #form-status.is-success { color: #6FCF97; }
  :root[data-theme="dark"] #form-status.is-error { color: #F2998A; }

  /* ---------- CTA STRIP ---------- */
  .cta { background: var(--brand-dark); color: var(--paper); padding: 70px 0; text-align: center; }
  .cta h2 { color: var(--paper); margin: 0 auto 16px; max-width: 20ch; }
  .cta p { color: #C7CFDA; max-width: 40ch; margin: 0 auto 30px; }
  .cta .btn-primary { background: var(--gold); color: #1B1204; border-color: var(--gold); }

  /* ---------- FOOTER ---------- */
  footer { padding: 42px 0 56px; }
  .footer-grid { display: flex; justify-content: space-between; flex-wrap: wrap; gap: 24px; font-size: 0.85rem; color: var(--steel); }
  .footer-grid .col a { display: block; margin-bottom: 8px; text-decoration: none; color: var(--fg); opacity: 0.75; }
  .footer-logo { height: 56px; width: auto; margin-bottom: 10px; }
  .footer-grid .col span.office { display: block; margin-top: 6px; }

  ::selection { background: var(--gold); color: #1B1204; }
  a:focus-visible, button:focus-visible { outline: 2px solid var(--gold); outline-offset: 2px; }

  @media (prefers-reduced-motion: reduce) {
    html { scroll-behavior: auto; }
    .project-card, .project-card .thumb img { transition: none; }
    body { animation: none; }
    ::view-transition-old(root), ::view-transition-new(root) { animation: none; }
    .marquee-track { animation: none; }
  }

  /* ---------- MAPAS DE OFICINAS ---------- */
  .maps-block { margin-top: 64px; }
  .maps-block .idx { display: block; margin-bottom: 18px; }
  .maps-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; }
  @media (max-width: 820px) { .maps-grid { grid-template-columns: 1fr; } }
  .map-card { margin: 0; border: 1px solid var(--panel-line); background: var(--panel); }
  .map-card figcaption { padding: 14px 18px; display: grid; gap: 2px; }
  .map-card figcaption b { font-family: var(--font-head); font-size: 1.05rem; font-weight: 600; }
  .map-card figcaption span { font-size: 0.9rem; color: var(--steel); }
  .map-card iframe { display: block; width: 100%; height: 340px; border: 0; border-top: 1px solid var(--panel-line); }
  @media (max-width: 480px) { .map-card iframe { height: 280px; } }