/* ==============================
   PUERTAS BLINDEX - ESTILOS
   Paleta: rojos, negro, blanco
   ============================== */

:root {
  --rojo: #e31b23;
  --rojo-oscuro: #a80f17;
  --rojo-suave: #fff1f2;
  --negro: #111111;
  --gris-oscuro: #2b2b2b;
  --gris: #666666;
  --gris-claro: #f5f5f5;
  --blanco: #ffffff;
  --borde: #dddddd;
  --sombra: 0 10px 30px rgba(0, 0, 0, 0.12);
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: Arial, Helvetica, sans-serif;
  color: var(--gris-oscuro);
  background: var(--blanco);
  line-height: 1.6;
}

img {
  max-width: 100%;
  height: auto;
}

a {
  color: inherit;
  text-decoration: none;
}

ul {
  padding-left: 20px;
}

li {
  margin-bottom: 8px;
}

/* ==============================
   CONTENEDORES
   ============================== */

.contenedor {
  width: min(1120px, 92%);
  margin: 0 auto;
}

.seccion {
  padding: 70px 0;
}

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

.seccion-roja {
  background: linear-gradient(135deg, var(--rojo), var(--rojo-oscuro));
  color: var(--blanco);
}

.grid-2 {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 36px;
  align-items: center;
}

.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 22px;
}

.grid-4 {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 18px;
}

/* ==============================
   HEADER
   ============================== */

.header {
  background: var(--negro);
  border-bottom: 4px solid var(--rojo);
  position: sticky;
  top: 0;
  z-index: 20;
}

.header-contenido {
  min-height: 86px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 24px;
}

.logo {
  display: flex;
  align-items: center;
}

.logo img {
  width: 230px;
  height: auto;
  display: block;
}

.nav {
  display: flex;
  align-items: center;
  gap: 20px;
}

.nav a {
  color: var(--blanco);
  font-size: 15px;
  font-weight: 700;
  transition: color 0.2s ease;
}

.nav a:hover,
.nav a.activo {
  color: var(--rojo);
}

/* ==============================
   BOTONES
   ============================== */

.boton {
  display: inline-block;
  background: var(--rojo);
  color: var(--blanco);
  padding: 14px 24px;
  border-radius: 8px;
  font-weight: 800;
  border: 2px solid var(--rojo);
  transition: all 0.2s ease;
}

.boton:hover {
  background: var(--rojo-oscuro);
  border-color: var(--rojo-oscuro);
}

.boton-secundario {
  background: transparent;
  color: var(--rojo);
  border-color: var(--rojo);
}

.boton-secundario:hover {
  background: var(--rojo);
  color: var(--blanco);
}

.boton-blanco {
  background: var(--blanco);
  color: var(--rojo);
  border-color: var(--blanco);
}

.boton-blanco:hover {
  background: transparent;
  color: var(--blanco);
  border-color: var(--blanco);
}

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

/* ==============================
   HERO
   ============================== */

.hero {
  background:
    linear-gradient(90deg, rgba(17, 17, 17, 0.93), rgba(17, 17, 17, 0.72)),
    linear-gradient(135deg, #1c1c1c, #3a0508);
  color: var(--blanco);
  padding: 90px 0;
}

.hero h1 {
  font-size: clamp(36px, 6vw, 62px);
  line-height: 1.08;
  margin-bottom: 20px;
}

.hero h1 span {
  color: var(--rojo);
}

.hero p {
  font-size: 20px;
  max-width: 760px;
  color: #eeeeee;
}

.hero-lista {
  margin-top: 28px;
  display: grid;
  gap: 10px;
}

.hero-lista div {
  font-weight: 700;
  color: var(--blanco);
}

.hero-card {
  background: var(--blanco);
  color: var(--gris-oscuro);
  padding: 28px;
  border-radius: 16px;
  box-shadow: var(--sombra);
  border-top: 6px solid var(--rojo);
}

.hero-card h2 {
  color: var(--negro);
  margin-bottom: 14px;
  font-size: 24px;
}

.hero-card p {
  color: var(--gris);
  font-size: 16px;
}

/* ==============================
   TITULOS
   ============================== */

.titulo-seccion {
  margin-bottom: 32px;
}

.titulo-seccion h2 {
  color: var(--negro);
  font-size: clamp(28px, 4vw, 42px);
  line-height: 1.15;
  margin-bottom: 12px;
}

.titulo-seccion p {
  color: var(--gris);
  font-size: 18px;
  max-width: 760px;
}

.seccion-roja .titulo-seccion h2,
.seccion-roja .titulo-seccion p {
  color: var(--blanco);
}

/* ==============================
   TARJETAS
   ============================== */

.tarjeta {
  background: var(--blanco);
  border: 1px solid var(--borde);
  border-radius: 14px;
  padding: 24px;
  box-shadow: 0 6px 18px rgba(0, 0, 0, 0.06);
}

.tarjeta h3 {
  color: var(--negro);
  font-size: 22px;
  margin-bottom: 12px;
}

.tarjeta p {
  color: var(--gris);
}

.tarjeta-destacada {
  border-top: 5px solid var(--rojo);
}

.numero {
  display: inline-flex;
  width: 38px;
  height: 38px;
  background: var(--rojo);
  color: var(--blanco);
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  font-weight: 800;
  margin-bottom: 14px;
}

/* ==============================
   BLOQUES DE CONTENIDO
   ============================== */

.bloque-texto h2 {
  color: var(--negro);
  font-size: 36px;
  line-height: 1.18;
  margin-bottom: 18px;
}

.bloque-texto h3 {
  color: var(--negro);
  font-size: 25px;
  margin: 28px 0 10px;
}

.bloque-texto p {
  margin-bottom: 16px;
}

.bloque-texto ul {
  margin: 14px 0 22px;
}

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

.lista-check li {
  position: relative;
  padding-left: 28px;
}

.lista-check li::before {
  content: "✓";
  position: absolute;
  left: 0;
  top: 0;
  color: var(--rojo);
  font-weight: 900;
}

/* ==============================
   CTA
   ============================== */

.cta {
  background: var(--negro);
  color: var(--blanco);
  padding: 58px 0;
  border-top: 5px solid var(--rojo);
}

.cta-contenido {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 28px;
}

.cta h2 {
  font-size: 34px;
  line-height: 1.15;
  margin-bottom: 10px;
}

.cta p {
  color: #dddddd;
  font-size: 18px;
}

/* ==============================
   FOOTER
   ============================== */

.footer {
  background: #080808;
  color: var(--blanco);
  padding: 34px 0;
}

.footer-contenido {
  display: flex;
  justify-content: space-between;
  gap: 24px;
  align-items: center;
}

.footer p {
  color: #bbbbbb;
  font-size: 14px;
}

.footer a {
  color: var(--rojo);
  font-weight: 700;
}

/* ==============================
   RESPONSIVE
   ============================== */

@media (max-width: 900px) {
  .header-contenido,
  .footer-contenido,
  .cta-contenido {
    flex-direction: column;
    align-items: flex-start;
  }

  .nav {
    flex-wrap: wrap;
    gap: 14px;
  }

  .grid-2,
  .grid-3,
  .grid-4 {
    grid-template-columns: 1fr;
  }

  .hero {
    padding: 70px 0;
  }

  .logo img {
    width: 210px;
  }
}

@media (max-width: 520px) {
  .seccion {
    padding: 54px 0;
  }

  .hero h1 {
    font-size: 34px;
  }

  .hero p {
    font-size: 18px;
  }

  .boton {
    width: 100%;
    text-align: center;
  }

  .grupo-botones {
    width: 100%;
  }
}