/* IA EYE — Landing styles
   Paleta sobria ejecutiva: negro casi puro, crema/marfil, azul ejecutivo, gris carbón.
   Serif Playfair en titulares (autoridad), Inter en cuerpo (legibilidad).
   Mobile-first.
*/

:root {
  /* Paleta gran consultora — McKinsey/BCG/Deloitte feel */
  --c-ink: #0A1F3D;          /* navy profundo (no negro) — autoridad */
  --c-ink-soft: #122A4A;     /* navy ligeramente más claro para tarjetas oscuras */
  --c-ink-line: #1E3556;     /* línea sobre navy */
  --c-paper: #FAFAF7;        /* off-white casi puro, levísima calidez */
  --c-paper-2: #F1EEE6;      /* gris cálido suave */
  --c-line: #E2DDD2;         /* líneas claras */
  --c-muted: #4A5468;        /* gris azulado para texto secundario */
  --c-accent: #2B4F76;       /* azul medio para enlaces y detalles */
  --c-accent-2: #A6804D;     /* dorado muy contenido, solo detalles puntuales */
  --radius: 2px;             /* casi recto, más austero */
  --max: 1200px;
  --fs-base: 17px;

  --ff-serif: 'Source Serif 4', 'Source Serif Pro', Georgia, 'Times New Roman', serif;
  --ff-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', system-ui, sans-serif;
}

@import url('https://fonts.googleapis.com/css2?family=Source+Serif+4:opsz,wght@8..60,500;8..60,600;8..60,700&family=Inter:wght@400;500;600;700&display=swap');

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: var(--ff-sans);
  font-size: var(--fs-base);
  line-height: 1.6;
  color: var(--c-ink);
  background: var(--c-paper);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

.container {
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 24px;
}

h1, h2, h3 {
  font-family: var(--ff-serif);
  font-weight: 600;
  letter-spacing: -0.015em;
  line-height: 1.18;
  color: var(--c-ink);
}

p { margin: 0 0 1em; }

a {
  color: var(--c-accent);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: border-color .15s ease;
}
a:hover { border-bottom-color: currentColor; }

/* ============ NAV ============ */
.nav {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(246,242,234,0.92);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--c-line);
}
.nav-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 68px;
}
.brand {
  font-family: var(--ff-serif);
  font-weight: 700;
  font-size: 1.35rem;
  letter-spacing: 0.02em;
  color: var(--c-ink);
  border: 0;
}
.brand-dot {
  color: var(--c-accent);
  margin: 0 2px;
}
.nav-links {
  display: flex;
  gap: 28px;
  align-items: center;
}
.nav-links a {
  color: var(--c-ink);
  font-size: 0.95rem;
  font-weight: 500;
  border: 0;
}
.nav-links a:hover { color: var(--c-accent); }
.nav-cta {
  background: var(--c-ink);
  color: var(--c-paper) !important;
  padding: 9px 18px;
  border-radius: var(--radius);
}
.nav-cta:hover { background: var(--c-accent); }

@media (max-width: 720px) {
  .nav-links a:not(.nav-cta) { display: none; }
}

/* ============ HERO ============ */
.hero {
  padding: 120px 0 100px;
  border-bottom: 1px solid var(--c-line);
}
.kicker {
  font-size: 0.78rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.18em;
  color: var(--c-accent);
  margin-bottom: 18px;
}
.hero h1 {
  font-size: clamp(2.1rem, 5.2vw, 3.8rem);
  margin: 0 0 28px;
  max-width: 22ch;
  font-weight: 600;
}
.hero h1 .accent {
  color: var(--c-accent);
}
.hero .lead {
  font-size: 1.18rem;
  color: var(--c-muted);
  max-width: 60ch;
  margin-bottom: 36px;
}
.hero-cta {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
}
.btn-primary,
.btn-ghost {
  display: inline-block;
  padding: 14px 28px;
  font-size: 0.98rem;
  font-weight: 600;
  border-radius: var(--radius);
  cursor: pointer;
  transition: transform .12s ease, background .2s ease, color .2s ease;
  border: 1px solid transparent;
}
.btn-primary {
  background: var(--c-ink);
  color: var(--c-paper);
  border: 0;
}
.btn-primary:hover { background: var(--c-accent); }
.btn-ghost {
  background: transparent;
  color: var(--c-ink);
  border-color: var(--c-ink);
}
.btn-ghost:hover { background: var(--c-ink); color: var(--c-paper); }

/* ============ PROBLEMA ============ */
.problema {
  padding: 88px 0;
  background: var(--c-paper-2);
  border-bottom: 1px solid var(--c-line);
}
.section-title {
  font-size: clamp(1.6rem, 3.5vw, 2.4rem);
  margin: 0 0 18px;
  max-width: 28ch;
}
.section-lead {
  font-size: 1.08rem;
  color: var(--c-muted);
  max-width: 65ch;
  margin-bottom: 48px;
}
.problema-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 20px;
  margin: 40px 0;
}
.problema-item {
  font-family: var(--ff-serif);
  font-style: italic;
  font-size: 1.12rem;
  padding: 26px 28px;
  background: var(--c-paper);
  border-left: 2px solid var(--c-accent);
  color: var(--c-ink);
  line-height: 1.5;
}
.problema-cierre {
  font-size: 1.25rem;
  margin-top: 36px;
  max-width: 60ch;
}

/* ============ MÉTODO ============ */
.metodo { padding: 96px 0; }
.metodo-steps {
  list-style: none;
  padding: 0;
  margin: 56px 0 0;
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 28px;
}
.metodo-steps > li {
  padding: 36px 36px 40px;
  background: #fff;
  border: 1px solid var(--c-line);
  border-radius: var(--radius);
  display: flex;
  flex-direction: column;
  gap: 14px;
  transition: border-color .2s ease, transform .2s ease;
}
.metodo-steps > li:hover {
  border-color: var(--c-accent);
}
.step-num {
  font-family: var(--ff-sans);
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--c-accent);
  line-height: 1;
  letter-spacing: 0.04em;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--c-line);
  width: fit-content;
  padding-right: 22px;
  font-feature-settings: "tnum" 1;
}
.metodo-steps h3 {
  font-size: 1.35rem;
  margin: 0;
}
.metodo-steps p {
  color: var(--c-muted);
  margin: 0;
  font-size: 0.97rem;
  line-height: 1.6;
}

@media (max-width: 760px) {
  .metodo-steps { grid-template-columns: 1fr; gap: 18px; }
  .metodo-steps > li { padding: 28px; }
}
.ia-nota {
  margin-top: 64px;
  padding: 32px 36px;
  background: var(--c-ink);
  color: var(--c-paper);
  border-radius: var(--radius);
  border-left: 3px solid #8FA8C7;
}
.ia-nota p { margin: 0; line-height: 1.65; }
.ia-nota strong { color: #C9B98A; font-weight: 600; font-family: var(--ff-sans); }


/* ============ CASOS ============ */
.casos {
  padding: 110px 0;
  background: var(--c-ink);
  color: var(--c-paper);
}
.casos h2, .casos h3 { color: var(--c-paper); }
.casos .kicker { color: #8FA8C7; }
.casos .section-lead { color: rgba(250,250,247,0.72); }
.casos-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 28px;
  margin-top: 52px;
}
@media (max-width: 760px) {
  .casos-grid { grid-template-columns: 1fr; }
}
.caso {
  background: var(--c-ink-soft);
  padding: 32px;
  border-radius: var(--radius);
  border: 1px solid rgba(255,255,255,0.07);
}
.caso-tag {
  font-size: 0.74rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.18em;
  color: #8FA8C7;
  margin-bottom: 14px;
}
.caso h3 {
  font-size: 1.25rem;
  margin: 0 0 16px;
  line-height: 1.3;
}
.caso p {
  color: rgba(246,242,234,0.78);
  font-size: 0.97rem;
}
.caso-impacto {
  margin-top: 18px;
  padding-top: 18px;
  border-top: 1px solid rgba(255,255,255,0.1);
  color: #C9B98A !important;
  font-style: italic;
  font-size: 0.94rem !important;
}

/* ============ FIRMA ============ */
.firma {
  padding: 96px 0;
  background: var(--c-paper-2);
  border-top: 1px solid var(--c-line);
}
.firma-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr;
  gap: 56px;
  margin-top: 32px;
  align-items: start;
}
.firma-foto {
  margin: 0 0 32px;
  display: grid;
  grid-template-columns: 180px 1fr;
  gap: 24px;
  align-items: start;
}
.firma-foto img {
  width: 180px;
  height: 180px;
  object-fit: cover;
  border-radius: 50%;
  filter: grayscale(15%) contrast(1.02);
  border: 3px solid var(--c-paper);
  box-shadow: 0 6px 24px rgba(10,31,61,0.14);
}
.firma-foto figcaption {
  font-size: 0.97rem;
  color: var(--c-muted);
  line-height: 1.55;
  font-style: normal;
}
.firma-foto figcaption strong {
  display: block;
  color: var(--c-ink);
  font-family: var(--ff-sans);
  font-size: 1.05rem;
  font-weight: 600;
  letter-spacing: -0.005em;
  margin-bottom: 10px;
  line-height: 1.35;
}
@media (max-width: 600px) {
  .firma-foto { grid-template-columns: 1fr; gap: 16px; }
  .firma-foto img { width: 140px; height: 140px; }
}
.firma-bullets {
  list-style: none;
  padding: 0;
  margin: 0;
}
.firma-bullets li {
  padding: 14px 0;
  border-bottom: 1px solid var(--c-line);
  color: var(--c-muted);
}
.firma-bullets li:last-child { border-bottom: 0; }
.firma-bullets strong { color: var(--c-ink); }

@media (max-width: 760px) {
  .firma-grid { grid-template-columns: 1fr; gap: 32px; }
}

/* ============ DIFERENCIAS ============ */
.diferencias {
  padding: 96px 0;
  border-top: 1px solid var(--c-line);
}
.diferencias-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
  margin-top: 48px;
}
.dif-no, .dif-si {
  padding: 32px;
  border-radius: var(--radius);
}
.dif-no {
  background: var(--c-paper-2);
  border: 1px solid var(--c-line);
}
.dif-si {
  background: var(--c-ink);
  color: var(--c-paper);
}
.dif-si h3 { color: var(--c-paper); }
.dif-no h3, .dif-si h3 {
  font-size: 1.2rem;
  margin: 0 0 20px;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  font-family: var(--ff-sans);
  font-weight: 600;
}
.dif-no ul, .dif-si ul {
  list-style: none;
  padding: 0;
  margin: 0;
}
.dif-no li, .dif-si li {
  padding: 10px 0 10px 28px;
  position: relative;
  font-size: 1.02rem;
}
.dif-no li::before {
  content: "✕";
  position: absolute;
  left: 0;
  color: #B04A4A;
  font-weight: 700;
}
.dif-si li {
  color: var(--c-paper);
}
.dif-si li::before {
  content: "✓";
  position: absolute;
  left: 0;
  color: #8FA8C7;
  font-weight: 700;
}

@media (max-width: 720px) {
  .diferencias-grid { grid-template-columns: 1fr; }
}

/* ============ CONTACTO ============ */
.contacto {
  padding: 96px 0;
  background: var(--c-paper);
  border-top: 1px solid var(--c-line);
}
.form {
  margin-top: 48px;
  display: grid;
  gap: 22px;
  max-width: 720px;
}
.form-row { display: flex; flex-direction: column; gap: 8px; }
.form-row-2 {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}
@media (max-width: 600px) {
  .form-row-2 { grid-template-columns: 1fr; }
}
.form label {
  font-size: 0.88rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  color: var(--c-ink);
}
.form input[type="text"],
.form input[type="email"],
.form input[type="tel"],
.form textarea {
  font-family: var(--ff-sans);
  font-size: 1rem;
  padding: 14px 16px;
  border: 1px solid var(--c-line);
  border-radius: var(--radius);
  background: #fff;
  color: var(--c-ink);
  transition: border-color .15s ease, box-shadow .15s ease;
}
.form input:focus,
.form textarea:focus {
  outline: none;
  border-color: var(--c-accent);
  box-shadow: 0 0 0 3px rgba(30,58,95,0.12);
}
.form textarea { resize: vertical; }
.form-consent { flex-direction: row; }
.checkbox {
  display: flex;
  gap: 12px;
  align-items: flex-start;
  font-size: 0.92rem;
  color: var(--c-muted);
  font-weight: 400;
  cursor: pointer;
}
.checkbox input { margin-top: 4px; }
.form button[type="submit"] {
  justify-self: start;
  margin-top: 8px;
}
.form-foot {
  font-size: 0.86rem;
  color: var(--c-muted);
  margin: 0;
}
.contacto-directo {
  margin-top: 32px;
  padding-top: 24px;
  border-top: 1px solid var(--c-line);
  font-size: 0.95rem;
  color: var(--c-muted);
}

/* ============ FOOTER ============ */
.footer {
  background: var(--c-ink);
  color: var(--c-paper);
  padding: 56px 0 32px;
}
.footer .brand { color: var(--c-paper); font-size: 1.5rem; }
.footer-inner {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 32px;
  align-items: start;
}
.footer-claim {
  margin: 8px 0 0;
  color: rgba(246,242,234,0.6);
  font-size: 0.95rem;
}
.footer-links {
  display: flex;
  gap: 24px;
  flex-wrap: wrap;
}
.footer-links a {
  color: var(--c-paper);
  font-size: 0.92rem;
  border: 0;
  opacity: 0.8;
}
.footer-links a:hover { opacity: 1; }
.footer-copy {
  grid-column: 1 / -1;
  margin: 32px 0 0;
  padding-top: 24px;
  border-top: 1px solid rgba(255,255,255,0.08);
  font-size: 0.82rem;
  color: rgba(246,242,234,0.4);
}

@media (max-width: 600px) {
  .footer-inner { grid-template-columns: 1fr; }
}