/* ==========================================================================
   Blue Chain Advisory — Hoja de estilos principal
   Dominio: bluechain.com.mx
   Paleta institucional tomada de la presentación corporativa.
   ========================================================================== */

:root {
  --navy: #0d2240;
  --navy-900: #091729;
  --azul: #1a4a8a;
  --teal: #0e7c7b;
  --teal-700: #0a6060;
  --claro: #e2ebf6;
  --pizarra: #64748b;
  --tinta: #101828;
  --blanco: #ffffff;
  --gris-fondo: #f6f8fb;
  --borde: #dfe6ef;

  --radio: 14px;
  --radio-sm: 9px;
  --sombra: 0 10px 30px rgba(13, 34, 64, 0.08);
  --sombra-fuerte: 0 18px 45px rgba(13, 34, 64, 0.16);
  --ancho: 1140px;
  --transicion: 0.22s ease;
  --fuente: "Segoe UI", Roboto, "Helvetica Neue", Arial, system-ui, -apple-system,
    "Noto Sans", sans-serif;
}

/* ---------- Reset básico ---------- */
*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--fuente);
  font-size: 17px;
  line-height: 1.65;
  color: var(--tinta);
  background: var(--blanco);
}

img,
svg {
  max-width: 100%;
  height: auto;
  display: block;
}

a {
  color: var(--azul);
  text-decoration: none;
}

a:hover,
a:focus {
  text-decoration: underline;
}

h1,
h2,
h3,
h4 {
  color: var(--navy);
  line-height: 1.2;
  margin: 0 0 0.6em;
  font-weight: 700;
  letter-spacing: -0.01em;
}

h1 {
  font-size: clamp(2rem, 4.6vw, 3.15rem);
}

h2 {
  font-size: clamp(1.5rem, 3vw, 2.15rem);
}

h3 {
  font-size: 1.16rem;
}

p {
  margin: 0 0 1rem;
}

ul {
  margin: 0 0 1rem;
  padding-left: 1.15rem;
}

li {
  margin-bottom: 0.4rem;
}

:focus-visible {
  outline: 3px solid var(--teal);
  outline-offset: 3px;
}

/* ---------- Utilidades de layout ---------- */
.contenedor {
  width: 100%;
  max-width: var(--ancho);
  margin: 0 auto;
  padding: 0 22px;
}

.seccion {
  padding: 76px 0;
}

.seccion--clara {
  background: var(--gris-fondo);
}

.seccion--azul {
  background: linear-gradient(160deg, var(--navy) 0%, var(--azul) 100%);
  color: var(--claro);
}

.seccion--azul h1,
.seccion--azul h2,
.seccion--azul h3,
.seccion--azul h4 {
  color: var(--blanco);
}

.seccion--azul .migas,
.seccion--azul .migas a {
  color: #a9c0dd;
}

.seccion--compacta {
  padding: 52px 0;
}

/* Sección oscura con fotografía de fondo (texto siempre a la izquierda) */
.seccion--foto {
  background-color: var(--navy);
  background-image: linear-gradient(
      100deg,
      rgba(9, 23, 41, 0.96) 0%,
      rgba(9, 23, 41, 0.88) 45%,
      rgba(13, 34, 64, 0.7) 100%
    ),
    url("../img/relacionamiento-objetivos.jpg");
  background-size: cover, cover;
  background-position: center, center;
  background-repeat: no-repeat, no-repeat;
}

/* Bloque de texto + imagen reutilizable */
.media-split {
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: 48px;
  align-items: center;
}

.media-split + .grid {
  margin-top: 40px;
}

.media-split__imagen {
  margin: 0;
  border-radius: var(--radio);
  overflow: hidden;
  box-shadow: var(--sombra-fuerte);
  background: var(--claro);
}

.media-split__imagen img {
  width: 100%;
  height: 100%;
  aspect-ratio: 3 / 2;
  object-fit: cover;
}

.media-split--invertido .media-split__texto {
  order: 2;
}

.media-split--invertido .media-split__imagen {
  order: 1;
}

@media (max-width: 900px) {
  .media-split {
    grid-template-columns: 1fr;
    gap: 28px;
  }

  .media-split--invertido .media-split__texto,
  .media-split--invertido .media-split__imagen {
    order: initial;
  }
}

.centrado {
  text-align: center;
}

.centrado .lead {
  margin-left: auto;
  margin-right: auto;
}

.lead {
  font-size: 1.09rem;
  color: var(--pizarra);
  max-width: 62ch;
}

.seccion--azul .lead,
.seccion--azul p {
  color: var(--claro);
}

.kicker {
  display: inline-block;
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--teal);
  margin-bottom: 0.85rem;
}

.seccion--azul .kicker {
  color: #6fd3d1;
}

.idioma {
  display: block;
  font-size: 0.9rem;
  font-style: italic;
  color: var(--pizarra);
}

.seccion--azul .idioma {
  color: #a9c0dd;
}

/* ---------- Encabezado / navegación ---------- */
.encabezado {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(255, 255, 255, 0.96);
  backdrop-filter: saturate(180%) blur(8px);
  border-bottom: 1px solid var(--borde);
}

.encabezado__interior {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  min-height: 76px;
}

.marca {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
}

.marca:hover {
  text-decoration: none;
}

.marca img {
  width: 44px;
  height: 44px;
}

.marca__texto {
  display: flex;
  flex-direction: column;
  line-height: 1.15;
}

.marca__nombre {
  font-weight: 700;
  font-size: 1.02rem;
  color: var(--navy);
  letter-spacing: 0.01em;
}

.marca__lema {
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.13em;
  color: var(--pizarra);
}

.nav-toggle {
  display: none;
  background: none;
  border: 1px solid var(--borde);
  border-radius: var(--radio-sm);
  padding: 9px 11px;
  cursor: pointer;
}

.nav-toggle span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--navy);
  margin: 4px 0;
  transition: var(--transicion);
}

.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);
}

.nav {
  display: flex;
  align-items: center;
  gap: 26px;
}

.nav ul {
  display: flex;
  align-items: center;
  gap: 24px;
  list-style: none;
  margin: 0;
  padding: 0;
}

.nav li {
  margin: 0;
}

.nav a {
  color: var(--navy);
  font-size: 0.95rem;
  font-weight: 600;
  text-decoration: none;
  padding: 6px 0;
  border-bottom: 2px solid transparent;
  transition: var(--transicion);
}

.nav a:hover,
.nav a:focus {
  border-bottom-color: var(--teal);
  text-decoration: none;
}

.nav a[aria-current="page"] {
  color: var(--teal);
  border-bottom-color: var(--teal);
}

/* ---------- Botones ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 13px 24px;
  border-radius: 999px;
  border: 1px solid transparent;
  font-family: inherit;
  font-size: 0.95rem;
  font-weight: 700;
  line-height: 1.2;
  cursor: pointer;
  text-decoration: none;
  transition: var(--transicion);
}

.btn:hover {
  text-decoration: none;
  transform: translateY(-1px);
  box-shadow: var(--sombra);
}

.btn--primario {
  background: var(--teal);
  color: var(--blanco);
}

.btn--primario:hover {
  background: var(--teal-700);
}

.btn--oscuro {
  background: var(--navy);
  color: var(--blanco);
}

.btn--contorno {
  background: transparent;
  color: var(--navy);
  border-color: var(--borde);
}

.btn--contorno-claro {
  background: transparent;
  color: var(--blanco);
  border-color: rgba(255, 255, 255, 0.55);
}

.btn--contorno-claro:hover {
  background: rgba(255, 255, 255, 0.12);
}

.btn--bloque {
  width: 100%;
}

.acciones {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 26px;
}

/* ---------- Hero ---------- */
.hero {
  position: relative;
  overflow: hidden;
  background-color: var(--navy-900);
  background-image: linear-gradient(
      155deg,
      rgba(9, 23, 41, 0.95) 0%,
      rgba(13, 34, 64, 0.9) 45%,
      rgba(26, 74, 138, 0.84) 100%
    ),
    url("../img/hero-consulta.jpg");
  background-size: cover, cover;
  background-position: center, center;
  background-repeat: no-repeat, no-repeat;
  color: var(--claro);
  padding: 92px 0 84px;
}

.hero::after {
  content: "";
  position: absolute;
  right: -140px;
  top: -140px;
  width: 520px;
  height: 520px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(14, 124, 123, 0.5) 0%, rgba(14, 124, 123, 0) 68%);
  pointer-events: none;
}

.hero__grid {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 56px;
  align-items: center;
}

.hero h1 {
  color: var(--blanco);
  margin-bottom: 0.35em;
}

.hero__marca {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-bottom: 26px;
}

.hero__marca img {
  width: 62px;
  height: 62px;
  border-radius: 14px;
  background: rgba(255, 255, 255, 0.06);
  padding: 6px;
}

.hero__marca span {
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.18em;
  color: #9fb6d6;
}

.hero__subtitulo {
  font-size: 1.14rem;
  color: var(--claro);
  max-width: 56ch;
}

.hero__destacado {
  background: rgba(255, 255, 255, 0.07);
  border: 1px solid rgba(255, 255, 255, 0.16);
  border-radius: var(--radio);
  padding: 30px;
}

.hero__destacado h2 {
  color: var(--blanco);
  font-size: 1.1rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: 18px;
}

.hero__lista {
  list-style: none;
  margin: 0;
  padding: 0;
}

.hero__lista li {
  display: flex;
  gap: 12px;
  align-items: flex-start;
  padding: 12px 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.12);
  color: var(--claro);
  margin: 0;
}

.hero__lista li:last-child {
  border-bottom: 0;
}

.hero__lista strong {
  display: block;
  color: var(--blanco);
}

.hero__contacto {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  margin: 26px 0 0;
  font-size: 0.98rem;
  color: var(--claro);
}

.hero__contacto a {
  color: var(--blanco);
  font-weight: 600;
  border-bottom: 1px solid rgba(255, 255, 255, 0.4);
  padding-bottom: 1px;
}

.hero__contacto a:hover {
  border-bottom-color: var(--blanco);
  text-decoration: none;
}

.hero__contacto .sep {
  color: rgba(255, 255, 255, 0.45);
}

.check {
  flex: 0 0 auto;
  width: 22px;
  height: 22px;
  margin-top: 3px;
  border-radius: 50%;
  background: var(--teal);
  color: var(--blanco);
  font-size: 0.78rem;
  font-weight: 700;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

/* ---------- Rejillas y tarjetas ---------- */
.grid {
  display: grid;
  gap: 24px;
  margin-top: 40px;
}

.grid--2 {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.grid--3 {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.grid--4 {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.card {
  background: var(--blanco);
  border: 1px solid var(--borde);
  border-radius: var(--radio);
  padding: 28px;
  height: 100%;
  transition: var(--transicion);
}

.card:hover {
  box-shadow: var(--sombra);
  transform: translateY(-3px);
}

.card h3 {
  margin-bottom: 0.5rem;
}

.card p:last-child,
.card ul:last-child {
  margin-bottom: 0;
}

.card__numero {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 42px;
  height: 42px;
  border-radius: 12px;
  background: var(--claro);
  color: var(--navy);
  font-weight: 700;
  margin-bottom: 16px;
}

.card--teal .card__numero {
  background: rgba(14, 124, 123, 0.12);
  color: var(--teal);
}

.card--oscura {
  background: rgba(255, 255, 255, 0.06);
  border-color: rgba(255, 255, 255, 0.16);
  color: var(--claro);
}

.card--oscura h3 {
  color: var(--blanco);
}

.card__meta {
  font-size: 0.82rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--teal);
  font-weight: 700;
  margin-bottom: 10px;
}

.lista-check {
  list-style: none;
  padding: 0;
}

.lista-check li {
  position: relative;
  padding-left: 30px;
  margin-bottom: 0.55rem;
}

.lista-check li::before {
  content: "›";
  position: absolute;
  left: 6px;
  top: -1px;
  color: var(--teal);
  font-weight: 700;
  font-size: 1.15rem;
}

/* ---------- Pasos de metodología ---------- */
.pasos {
  counter-reset: paso;
  display: grid;
  gap: 22px;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  margin-top: 40px;
}

.paso {
  counter-increment: paso;
  background: var(--blanco);
  border: 1px solid var(--borde);
  border-top: 4px solid var(--teal);
  border-radius: var(--radio);
  padding: 26px 22px;
}

.paso::before {
  content: "0" counter(paso);
  display: block;
  font-size: 0.85rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  color: var(--teal);
  margin-bottom: 12px;
}

.paso h3 {
  font-size: 1.02rem;
}

.paso p {
  font-size: 0.94rem;
  color: var(--pizarra);
  margin-bottom: 0;
}

/* ---------- Franja de datos ---------- */
.datos {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 20px;
  margin-top: 34px;
}

.dato {
  border-left: 3px solid var(--teal);
  padding-left: 16px;
}

.dato strong {
  display: block;
  font-size: 1.05rem;
  color: var(--blanco);
}

.dato span {
  font-size: 0.9rem;
  color: var(--claro);
}

/* ---------- Etiquetas / sectores ---------- */
.etiquetas {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 24px;
  padding: 0;
  list-style: none;
}

.etiquetas li {
  background: var(--blanco);
  border: 1px solid var(--borde);
  border-radius: 999px;
  padding: 8px 16px;
  font-size: 0.9rem;
  color: var(--navy);
  margin: 0;
}

/* ---------- Formulario de contacto ---------- */
.formulario {
  background: var(--blanco);
  border: 1px solid var(--borde);
  border-radius: var(--radio);
  padding: 32px;
  box-shadow: var(--sombra);
}

.campo {
  margin-bottom: 18px;
}

.campo label {
  display: block;
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--navy);
  margin-bottom: 6px;
}

.campo input,
.campo select,
.campo textarea {
  width: 100%;
  padding: 12px 14px;
  border: 1px solid var(--borde);
  border-radius: var(--radio-sm);
  font-family: inherit;
  font-size: 1rem;
  color: var(--tinta);
  background: var(--blanco);
  transition: var(--transicion);
}

.campo input:focus,
.campo select:focus,
.campo textarea:focus {
  border-color: var(--teal);
  outline: none;
  box-shadow: 0 0 0 3px rgba(14, 124, 123, 0.16);
}

.campo textarea {
  min-height: 140px;
  resize: vertical;
}

.campo--check {
  display: flex;
  gap: 10px;
  align-items: flex-start;
  font-size: 0.9rem;
  color: var(--pizarra);
}

.campo--check input {
  width: auto;
  margin-top: 4px;
}

.aviso-form {
  margin-top: 14px;
  font-size: 0.86rem;
  color: var(--pizarra);
}

.mensaje-form {
  margin-top: 16px;
  padding: 14px 16px;
  border-radius: var(--radio-sm);
  font-size: 0.92rem;
  display: none;
}

.mensaje-form.visible {
  display: block;
}

.mensaje-form--ok {
  background: rgba(14, 124, 123, 0.1);
  border: 1px solid rgba(14, 124, 123, 0.35);
  color: var(--teal-700);
}

.mensaje-form--error {
  background: rgba(180, 40, 40, 0.08);
  border: 1px solid rgba(180, 40, 40, 0.32);
  color: #8f2020;
}

/* ---------- Datos de contacto ---------- */
.contacto-directo {
  list-style: none;
  padding: 0;
  margin: 0;
}

.contacto-directo li {
  display: flex;
  gap: 14px;
  align-items: flex-start;
  padding: 18px 0;
  border-bottom: 1px solid var(--borde);
  margin: 0;
}

.contacto-directo li:last-child {
  border-bottom: 0;
}

.contacto-directo strong {
  display: block;
  color: var(--navy);
}

.contacto-directo a {
  word-break: break-word;
}

.icono {
  flex: 0 0 auto;
  width: 40px;
  height: 40px;
  border-radius: 11px;
  background: var(--claro);
  color: var(--navy);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
}

/* ---------- Llamado final ---------- */
.cta-final {
  background: linear-gradient(140deg, var(--navy) 0%, var(--azul) 100%);
  color: var(--claro);
  border-radius: var(--radio);
  padding: 52px;
  text-align: center;
}

.cta-final h2 {
  color: var(--blanco);
}

.cta-final .acciones {
  justify-content: center;
}

/* ---------- Pie de página ---------- */
.pie {
  background: var(--navy-900);
  color: #b8c7db;
  padding: 56px 0 28px;
  font-size: 0.92rem;
}

.pie a {
  color: var(--claro);
}

.pie__grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr;
  gap: 36px;
}

.pie h3 {
  color: var(--blanco);
  font-size: 0.82rem;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  margin-bottom: 14px;
}

.pie ul {
  list-style: none;
  padding: 0;
  margin: 0;
}

.pie li {
  margin-bottom: 8px;
}

.pie__marca {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 16px;
}

.pie__marca img {
  width: 40px;
  height: 40px;
}

.pie__marca strong {
  color: var(--blanco);
  font-size: 1.02rem;
}

.pie__legal {
  margin-top: 38px;
  padding-top: 20px;
  border-top: 1px solid rgba(255, 255, 255, 0.14);
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  justify-content: space-between;
  font-size: 0.84rem;
}

/* ---------- Migas de pan ---------- */
.migas {
  font-size: 0.86rem;
  color: var(--pizarra);
  margin-bottom: 18px;
}

.migas a {
  color: var(--pizarra);
}

/* ---------- Accesibilidad ---------- */
.salto-contenido {
  position: absolute;
  left: -9999px;
  top: 0;
  background: var(--blanco);
  padding: 12px 18px;
  z-index: 100;
  border-radius: 0 0 var(--radio-sm) 0;
}

.salto-contenido:focus {
  left: 0;
}

.visualmente-oculto {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  * {
    transition: none !important;
  }
}

/* ---------- Responsive ---------- */
@media (max-width: 1024px) {
  .hero__grid {
    grid-template-columns: 1fr;
    gap: 40px;
  }

  .pasos {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .grid--4 {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .datos {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .pie__grid {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 860px) {
  .nav-toggle {
    display: block;
  }

  .nav {
    position: absolute;
    left: 0;
    right: 0;
    top: 100%;
    background: var(--blanco);
    border-bottom: 1px solid var(--borde);
    box-shadow: var(--sombra);
    padding: 18px 22px 24px;
    display: none;
    flex-direction: column;
    align-items: stretch;
    gap: 16px;
  }

  .nav.abierto {
    display: flex;
  }

  .nav ul {
    flex-direction: column;
    align-items: stretch;
    gap: 4px;
  }

  .nav a {
    display: block;
    padding: 12px 0;
    border-bottom: 1px solid var(--borde);
  }

  .grid--2,
  .grid--3 {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 620px) {
  body {
    font-size: 16px;
  }

  .hero {
    padding: 64px 0 58px;
    background-image: linear-gradient(
        160deg,
        rgba(9, 23, 41, 0.95) 0%,
        rgba(13, 34, 64, 0.91) 50%,
        rgba(26, 74, 138, 0.85) 100%
      ),
      url("../img/hero-consulta-movil.jpg");
  }

  .seccion--foto {
    background-image: linear-gradient(
        165deg,
        rgba(9, 23, 41, 0.95) 0%,
        rgba(9, 23, 41, 0.88) 55%,
        rgba(13, 34, 64, 0.78) 100%
      ),
      url("../img/relacionamiento-objetivos-movil.jpg");
  }

  .seccion {
    padding: 56px 0;
  }

  .pasos,
  .grid--4,
  .datos,
  .pie__grid {
    grid-template-columns: 1fr;
  }

  .cta-final {
    padding: 34px 22px;
  }

  .formulario {
    padding: 24px 20px;
  }

  .marca__lema {
    display: none;
  }

  .acciones .btn {
    width: 100%;
  }
}

/* ---------- Impresión ---------- */
@media print {
  .encabezado,
  .nav,
  .acciones,
  .cta-final {
    display: none;
  }

  body {
    color: #000;
    font-size: 12pt;
  }

  .seccion,
  .hero {
    background: none !important;
    color: #000 !important;
    padding: 16px 0;
  }

  .hero h1,
  .hero__subtitulo,
  .seccion--azul h2,
  .seccion--azul p {
    color: #000 !important;
  }
}