/* =============================================================
   1. Tokens
   ============================================================= */
:root {
  /* GVT brand — GVT-BRAND.md */
  --navy: #1F2749;
  --navy-deep: #161b38;

  --orange-900: #8F3B16;
  --orange-800: #B84E1D;
  --orange-600: #E86A24;
  --orange-400: #F28C45;
  --orange-300: #F7B77E;
  --orange-100: #FCE4CF;

  --n-900: #16181D;
  --n-800: #2D3138;
  --n-700: #505660;
  --n-500: #858B95;
  --n-300: #C8CCD2;
  --n-100: #F3F4F6;
  --white: #FFFFFF;

  --bg: var(--white);
  --bg-alt: var(--n-100);
  --text: var(--n-900);
  --text-dim: var(--n-700);
  --accent: var(--orange-600);
  --border: var(--n-300);

  --serif: "Montserrat", sans-serif;
  --sans: "Montserrat", system-ui, -apple-system, sans-serif;

  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --ease-soft: cubic-bezier(0.25, 0.46, 0.45, 0.94);
  --gutter: clamp(1.25rem, 4vw, 3.5rem);
  --radius: 14px;
  --radius-lg: 24px;
  --container: 1240px;
}

/* =============================================================
   2. Reset & base
   ============================================================= */
*, *::before, *::after { box-sizing: border-box; margin: 0; }
html {
  -webkit-text-size-adjust: 100%;
  overflow-x: clip;
  scroll-behavior: smooth;
}
body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: clip;
  overscroll-behavior-y: none;
}
img, svg, video { display: block; max-width: 100%; }
img { height: auto; }
button { font: inherit; color: inherit; cursor: pointer; border: 0; background: none; }
a { color: inherit; text-decoration: none; }
p { text-wrap: pretty; color: var(--text-dim); }
h1, h2, h3, h4 {
  font-family: var(--serif);
  text-wrap: balance;
  line-height: 1.08;
  letter-spacing: -0.01em;
  font-weight: 800;
  color: var(--text);
}
ul { list-style: none; padding: 0; }
::selection { background: var(--accent); color: var(--white); }

:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
  border-radius: 4px;
}

/* =============================================================
   3. Utilities
   ============================================================= */
.skip-link {
  position: fixed; top: -100px; left: 1rem;
  padding: .6rem 1rem; background: var(--navy); color: var(--white);
  z-index: 9999; border-radius: 8px; font-weight: 600;
}
.skip-link:focus { top: 1rem; }

.container {
  width: 100%;
  max-width: var(--container);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: .5rem;
  font-size: .8rem;
  font-weight: 700;
  letter-spacing: .08em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: .9rem;
}
.eyebrow::before {
  content: "";
  width: 18px; height: 2px;
  background: var(--accent);
  display: inline-block;
}

.section-title {
  font-size: clamp(1.9rem, 4vw, 2.9rem);
  max-width: 22ch;
}
.section-lead {
  font-size: clamp(1rem, 1.6vw, 1.15rem);
  max-width: 56ch;
  margin-top: 1rem;
}
.section-head { margin-bottom: clamp(2rem, 5vw, 3.5rem); }
.section-head.center { text-align: center; margin-inline: auto; }
.section-head.center .section-lead { margin-inline: auto; }

section { position: relative; }
.on-navy { background: var(--navy); color: var(--white); }
.on-navy .section-title, .on-navy h3 { color: var(--white); }
.on-navy p { color: rgba(255,255,255,.72); }
.on-navy .eyebrow { color: var(--orange-300); }
.on-navy .eyebrow::before { background: var(--orange-300); }
.on-alt { background: var(--bg-alt); }

.reveal {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity .8s var(--ease-out), transform .8s var(--ease-out);
}
.reveal.is-visible { opacity: 1; transform: none; }
.reveal[data-split] { opacity: 1; transform: none; }

/* =============================================================
   4. Buttons & links
   ============================================================= */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: .5rem;
  padding: .95rem 1.75rem;
  border-radius: 999px;
  font-weight: 700;
  font-size: .95rem;
  transition: transform .35s var(--ease-out), background .35s var(--ease-out),
              border-color .35s var(--ease-out), color .35s var(--ease-out);
}
.btn-primary { background: var(--accent); color: var(--white); }
.btn-primary:hover { transform: translateY(-2px); background: var(--orange-800); }
.btn-ghost { border: 1.5px solid var(--border); color: var(--text); }
.btn-ghost:hover { border-color: var(--accent); color: var(--accent); transform: translateY(-2px); }
.on-navy .btn-ghost { border-color: rgba(255,255,255,.3); color: var(--white); }
.on-navy .btn-ghost:hover { border-color: var(--orange-300); color: var(--orange-300); }
.btn-nav { padding: .7rem 1.4rem; background: var(--accent); color: var(--white); }
.btn-nav:hover { background: var(--orange-800); }
.btn:focus-visible { outline-offset: 3px; }

.link-arrow {
  display: inline-flex;
  align-items: center;
  gap: .4rem;
  font-weight: 700;
  color: var(--navy);
  border-bottom: 2px solid var(--border);
  padding-bottom: .15rem;
  transition: border-color .3s var(--ease-out), color .3s var(--ease-out), gap .3s var(--ease-out);
}
.link-arrow:hover { border-color: var(--accent); color: var(--accent); gap: .65rem; }
.link-arrow svg { width: 16px; height: 16px; flex: none; }

/* =============================================================
   5. Nav / Header
   ============================================================= */
.nav {
  position: sticky; top: 0; z-index: 100;
  background: rgba(255,255,255,.85);
  backdrop-filter: blur(14px) saturate(160%);
  -webkit-backdrop-filter: blur(14px) saturate(160%);
  border-bottom: 1px solid var(--border);
}
@supports not (backdrop-filter: blur(1px)) { .nav { background: var(--white); } }
.nav-inner { display: flex; align-items: center; justify-content: space-between; padding-block: 1rem; gap: 1rem; }
.nav-logo { font-family: var(--serif); font-weight: 800; font-size: 1.35rem; color: var(--navy); letter-spacing: -.02em; }
.nav-logo span { color: var(--accent); }
.nav-links { display: none; gap: 2rem; font-weight: 600; font-size: .95rem; }
.nav-links a { color: var(--text-dim); transition: color .25s var(--ease-out); }
.nav-links a:hover { color: var(--navy); }
.btn-nav { display: none; }

.nav-toggle { display: flex; flex-direction: column; gap: 5px; padding: .5rem; }
.nav-toggle span { width: 22px; height: 2px; background: var(--navy); border-radius: 2px; transition: transform .3s var(--ease-out), opacity .3s var(--ease-out); }
.nav-toggle[aria-expanded="true"] span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.nav-toggle[aria-expanded="true"] span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

.nav-links.is-open {
  display: flex; flex-direction: column;
  position: absolute; top: 100%; left: 0; right: 0;
  background: var(--white);
  padding: 1.5rem var(--gutter) 2rem;
  border-bottom: 1px solid var(--border);
  gap: 1.1rem;
}
.nav-links.is-open .btn-nav { display: inline-flex; margin-top: .5rem; }

/* =============================================================
   6. Hero
   ============================================================= */
.hero { position: relative; padding-block: clamp(3.5rem, 9vw, 6.5rem) clamp(3rem, 7vw, 5rem); overflow: clip; }
.hero-glow {
  position: absolute; inset: -30% -10% -60% -10%;
  background: radial-gradient(45% 35% at 50% 20%, rgba(31,39,73,.10), transparent 70%);
  pointer-events: none;
}
.hero-grid {
  position: relative;
  display: grid;
  gap: clamp(2rem, 5vw, 3.5rem);
  align-items: center;
}
.hero-copy { max-width: 640px; }
.hero-title { font-size: clamp(2.4rem, 5.6vw, 4.2rem); max-width: 15ch; }
.hero-title em { color: var(--accent); font-style: normal; }
.hero-sub { margin-top: 1.25rem; font-size: clamp(1.02rem, 1.6vw, 1.2rem); max-width: 46ch; }
.hero-actions { margin-top: 2rem; display: flex; flex-wrap: wrap; gap: .9rem; }
.hero-visual { position: relative; }

/* =============================================================
   7. Placeholder assets (dev-only, see GVT-ASSETS.md)
   ============================================================= */
.ph {
  position: relative;
  border-radius: var(--radius-lg);
  border: 2px dashed var(--orange-400);
  background:
    repeating-linear-gradient(135deg, var(--n-100), var(--n-100) 12px, #e9ebef 12px, #e9ebef 24px);
  display: flex; align-items: center; justify-content: center;
  overflow: hidden;
}
.ph-video { aspect-ratio: 16 / 9; }
.ph-square { aspect-ratio: 1 / 1; }
.ph-tall { aspect-ratio: 4 / 5; }
.ph-label {
  text-align: center;
  padding: 1.1rem 1.3rem;
  font-family: var(--sans);
  max-width: 92%;
}
.ph-tag {
  display: inline-block;
  background: var(--orange-600);
  color: var(--white);
  font-size: .68rem;
  font-weight: 800;
  letter-spacing: .06em;
  text-transform: uppercase;
  padding: .3rem .6rem;
  border-radius: 999px;
  margin-bottom: .6rem;
}
.ph-what { font-weight: 700; font-size: .92rem; color: var(--navy); }
.ph-meta { margin-top: .35rem; font-size: .74rem; color: var(--n-700); line-height: 1.5; }
.ph-id { margin-top: .5rem; font-size: .68rem; font-family: ui-monospace, monospace; color: var(--n-500); }

/* =============================================================
   8. Capabilities strip
   ============================================================= */
.cap-grid {
  display: grid;
  gap: 1rem;
  grid-template-columns: 1fr;
}
.cap-card {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.6rem;
  transition: transform .35s var(--ease-out), border-color .35s var(--ease-out);
}
.cap-card:hover { transform: translateY(-4px); border-color: var(--accent); }
.cap-index {
  font-family: var(--serif); font-weight: 800; font-size: .85rem;
  color: var(--accent); margin-bottom: .8rem;
}
.cap-card h3 { font-size: 1.05rem; margin-bottom: .4rem; }
.cap-card p { font-size: .88rem; }

/* =============================================================
   9. Diferencial (flujo conceptual)
   ============================================================= */
.flow { display: flex; flex-wrap: wrap; gap: .6rem; align-items: center; margin-top: 2rem; }
.flow-step {
  padding: .6rem 1.1rem;
  border-radius: 999px;
  border: 1px solid rgba(255,255,255,.22);
  font-size: .82rem;
  font-weight: 700;
  color: var(--white);
}
.flow-arrow { color: var(--orange-300); font-size: 1rem; }

/* =============================================================
   10. Soluciones (autoidentificación)
   ============================================================= */
.sol-grid { display: grid; gap: 1.1rem; grid-template-columns: 1fr; }
.sol-card {
  display: block;
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.9rem;
  transition: transform .35s var(--ease-out), border-color .35s var(--ease-out), box-shadow .35s var(--ease-out);
}
.sol-card:hover { transform: translateY(-4px); border-color: var(--accent); box-shadow: 0 20px 40px -24px rgba(31,39,73,.25); }
.sol-tag {
  display: inline-block; font-size: .72rem; font-weight: 800; letter-spacing: .05em;
  text-transform: uppercase; color: var(--accent); margin-bottom: .7rem;
}
.sol-card h3 { font-size: 1.2rem; margin-bottom: .5rem; max-width: 22ch; }
.sol-card p { font-size: .9rem; margin-bottom: 1rem; }
.sol-card .link-arrow { font-size: .88rem; }

/* =============================================================
   11. Clientes (marquee + grid)
   ============================================================= */
.clients-tabs { display: flex; gap: .6rem; margin-bottom: 2rem; flex-wrap: wrap; }
.clients-tab-label {
  font-size: .78rem; font-weight: 800; letter-spacing: .05em; text-transform: uppercase;
  padding: .5rem 1rem; border-radius: 999px; border: 1px solid var(--border); color: var(--text-dim);
}
.client-grid { display: grid; gap: .9rem; grid-template-columns: repeat(2, 1fr); }
.client-card {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.3rem 1.1rem;
  text-align: center;
  transition: transform .3s var(--ease-out), border-color .3s var(--ease-out);
}
.client-card:hover { transform: translateY(-3px); border-color: var(--accent); }
.client-logo-ph {
  height: 46px;
  border-radius: 8px;
  border: 1.5px dashed var(--orange-400);
  background: var(--n-100);
  display: flex; align-items: center; justify-content: center;
  font-size: .62rem; font-weight: 800; color: var(--n-700); letter-spacing: .03em;
  margin-bottom: .7rem;
}
.client-name { font-size: .78rem; font-weight: 800; color: var(--navy); }
.client-activity { font-size: .72rem; color: var(--text-dim); margin-top: .2rem; }
.client-kind { font-size: .62rem; color: var(--accent); font-weight: 800; text-transform: uppercase; letter-spacing: .04em; margin-top: .4rem; }

/* =============================================================
   12. Casos teaser
   ============================================================= */
.case-grid { display: grid; gap: 1.2rem; grid-template-columns: 1fr; }
.case-card {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: transform .35s var(--ease-out);
}
.case-card:hover { transform: translateY(-4px); }
.case-body { padding: 1.5rem; }
.case-body h3 { font-size: 1.05rem; margin-bottom: .4rem; }
.case-body p { font-size: .88rem; }

/* =============================================================
   13. Metodología teaser
   ============================================================= */
.method-row {
  display: grid;
  gap: 1rem;
  grid-template-columns: 1fr;
  counter-reset: step;
}
.method-step { position: relative; padding-top: 2.6rem; }
.method-step::before {
  counter-increment: step;
  content: "0" counter(step);
  font-family: var(--serif); font-weight: 800;
  font-size: 1.6rem; color: var(--orange-300);
  position: absolute; top: 0; left: 0;
}
.method-step h3 { font-size: 1rem; margin-bottom: .35rem; }
.method-step p { font-size: .85rem; }

/* =============================================================
   14. CTA final
   ============================================================= */
.cta-final { text-align: center; padding-block: clamp(4rem, 9vw, 6.5rem); }
.cta-final .section-title { margin-inline: auto; }
.cta-final .section-lead { margin-inline: auto; }
.cta-final .hero-actions { justify-content: center; }

/* =============================================================
   15. Footer
   ============================================================= */
.footer { background: var(--navy-deep); color: rgba(255,255,255,.7); padding-block: 3.5rem 2rem; }
.footer-grid {
  display: grid; gap: 2.2rem;
  grid-template-columns: 1fr;
  padding-bottom: 2.5rem;
  border-bottom: 1px solid rgba(255,255,255,.12);
}
.footer-brand .nav-logo { color: var(--white); }
.footer-brand p { color: rgba(255,255,255,.55); margin-top: .8rem; font-size: .88rem; max-width: 32ch; }
.footer-col h4 { color: var(--white); font-size: .82rem; letter-spacing: .04em; text-transform: uppercase; margin-bottom: 1rem; }
.footer-col ul { display: flex; flex-direction: column; gap: .6rem; }
.footer-col a { color: rgba(255,255,255,.65); font-size: .9rem; transition: color .25s var(--ease-out); }
.footer-col a:hover { color: var(--orange-300); }
.footer-bottom {
  display: flex; flex-wrap: wrap; gap: .8rem; justify-content: space-between;
  padding-top: 1.6rem; font-size: .78rem; color: rgba(255,255,255,.45);
}

/* =============================================================
   15b. Pills, detail sections, form (soluciones / nosotros / contacto)
   ============================================================= */
.pill-list { display: flex; flex-wrap: wrap; gap: .55rem; margin-top: 1.3rem; }
.pill {
  font-size: .8rem; font-weight: 600; padding: .45rem .9rem;
  border-radius: 999px; border: 1px solid var(--border); color: var(--text-dim);
}
.on-navy .pill { border-color: rgba(255,255,255,.25); color: rgba(255,255,255,.8); }

.solution-block { padding-block: clamp(3rem, 7vw, 5rem); scroll-margin-top: 90px; }
.solution-head { max-width: 640px; }
.solution-grid { display: grid; gap: 2rem; margin-top: 2rem; }

@media (min-width: 720px) {
  .solution-grid { grid-template-columns: 1.1fr .9fr; align-items: start; }
}

.detail-card {
  background: var(--white); border: 1px solid var(--border);
  border-radius: var(--radius-lg); padding: 1.8rem;
}
.detail-card h3 { font-size: 1rem; margin-bottom: .8rem; }
.detail-card ul { display: flex; flex-direction: column; gap: .6rem; }
.detail-card li { font-size: .88rem; color: var(--text-dim); padding-left: 1.1rem; position: relative; }
.detail-card li::before { content: "→"; position: absolute; left: 0; color: var(--accent); font-weight: 700; }

/* Form */
.form-grid { display: grid; gap: 1.1rem; }
@media (min-width: 640px) { .form-grid.two-col { grid-template-columns: 1fr 1fr; } }
.field { display: flex; flex-direction: column; gap: .45rem; }
.field.full { grid-column: 1 / -1; }
.field label { font-size: .85rem; font-weight: 700; color: var(--navy); }
.field input, .field select, .field textarea {
  font: inherit; font-size: .95rem;
  padding: .85rem 1rem; border: 1.5px solid var(--border); border-radius: 10px;
  background: var(--white); color: var(--text);
  transition: border-color .25s var(--ease-out);
}
.field input:focus, .field select:focus, .field textarea:focus {
  outline: none; border-color: var(--accent);
}
.field textarea { resize: vertical; min-height: 120px; }
.field-hint { font-size: .78rem; color: var(--n-500); }
.form-status {
  margin-top: 1.2rem; padding: 1rem 1.2rem; border-radius: 10px;
  background: var(--n-100); font-size: .9rem; color: var(--text-dim);
  display: none;
}
.form-status.is-visible { display: block; }
.form-status.is-error { background: var(--orange-100); color: var(--orange-900); }
.contact-info-list { display: flex; flex-direction: column; gap: 1.1rem; margin-top: 1.5rem; }
.contact-info-item { font-size: .9rem; color: var(--text-dim); }
.contact-info-item strong { display: block; color: var(--navy); font-size: .82rem; text-transform: uppercase; letter-spacing: .04em; margin-bottom: .25rem; }

/* =============================================================
   16. Responsive (mobile-first)
   ============================================================= */
@media (min-width: 540px) {
  .client-grid { grid-template-columns: repeat(3, 1fr); }
}

@media (min-width: 720px) {
  .cap-grid { grid-template-columns: repeat(2, 1fr); }
  .sol-grid { grid-template-columns: repeat(2, 1fr); }
  .case-grid { grid-template-columns: repeat(2, 1fr); }
  .method-row { grid-template-columns: repeat(3, 1fr); }
  .footer-grid { grid-template-columns: 1.3fr repeat(3, 1fr); }
}

@media (min-width: 960px) {
  .nav-links { display: flex; }
  .btn-nav { display: inline-flex; }
  .nav-toggle { display: none; }
  .hero-grid { grid-template-columns: 1.05fr .95fr; }
  .cap-grid { grid-template-columns: repeat(4, 1fr); }
  .client-grid { grid-template-columns: repeat(5, 1fr); }
  .case-grid { grid-template-columns: repeat(3, 1fr); }
  .method-row { grid-template-columns: repeat(5, 1fr); }
}

@media (min-width: 1280px) {
  .cap-grid { grid-template-columns: repeat(7, 1fr); }
}

/* =============================================================
   17. Reduced motion — only intrusive effects
   ============================================================= */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
}