body {
  background: linear-gradient(180deg, #042937 0%, #063447 100%);
  margin: 0;
  padding: 0;
  font-family: 'Montserrat', sans-serif;
}

html {
  scroll-behavior: smooth;
}

.estructuras {
  margin-top: 30px;
  margin-bottom: 70px;
}

/* HERO */
.estructuras-hero {
  min-height: 72vh;
  background-image: url("../imagenes/estructura-galpon-melipilla.png");
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;

  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  position: relative;
  padding: 40px 20px;
  overflow: hidden;
}

.estructuras-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(
    to bottom,
    rgba(0,0,0,0.45),
    rgba(0,0,0,0.68)
  );
}

.estructuras-hero-content {
  position: relative;
  z-index: 1;
  color: #fff;
  max-width: 850px;
}

.estructuras-tag {
  display: inline-block;
  padding: 8px 18px;
  border-radius: 999px;
  margin-bottom: 18px;
  background: rgba(214,161,6,.18);
  color: #f6d67a;
  border: 1px solid rgba(255,255,255,.15);
  font-size: .9rem;
  font-weight: 600;
}

.estructuras-hero h1 {
  font-size: 3rem;
  font-weight: 700;
  margin-bottom: 18px;
}

.estructuras-hero p {
  font-size: 1.08rem;
  line-height: 1.8;
  max-width: 760px;
  margin: 0 auto 28px;
}

.btn-primary {
  background: linear-gradient(135deg, #d6a106, #b98600);
  border: none;
  border-radius: 999px;
  padding: 12px 28px;
  font-weight: 700;
}

.btn-primary:hover {
  background: linear-gradient(135deg, #c99705, #a77700);
}

/* INTRO */
.estructuras-intro {
  margin-bottom: 40px;
}

.estructuras-intro h2,
.estructuras-info h2,
.estructuras-cta h2 {
  color: #fff;
  font-weight: 700;
  margin-bottom: 14px;
}

.estructuras-intro p,
.estructuras-cta p {
  color: rgba(255,255,255,.82);
  line-height: 1.8;
  max-width: 760px;
  margin: 0 auto;
}

/* CARDS */
.estructuras-card {
  background: #fff;
  border-radius: 20px;
  padding: 30px 24px;
  text-align: center;
  height: 100%;
  box-shadow: 0 12px 28px rgba(0,0,0,.15);
  transition: .3s ease;
}

.estructuras-card:hover {
  transform: translateY(-6px);
}

.icon-box {
  width: 72px;
  height: 72px;
  margin: 0 auto 18px;
  border-radius: 50%;
  background: linear-gradient(135deg, #d6a106, #b98600);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
}

.estructuras-card h3 {
  color: rgb(219,161,0);
  font-size: 1.15rem;
  font-weight: 700;
  margin-bottom: 14px;
}

.estructuras-card p {
  color: #475569;
  margin: 0;
  line-height: 1.8;
}

/* DESTACADO */
.estructuras-destacado {
  margin-top: 55px;
  background: rgba(255,255,255,.04);
  padding: 30px;
  border-radius: 24px;
}

.estructuras-img {
  width: 100%;
  border-radius: 20px;
}

.estructuras-info p {
  color: rgba(255,255,255,.86);
  line-height: 1.8;
  margin-bottom: 18px;
}

.estructuras-info ul {
  list-style: none;
  padding: 0;
}

.estructuras-info ul li {
  color: #fff;
  margin-bottom: 12px;
  padding-left: 28px;
  position: relative;
}

.estructuras-info ul li::before {
  content: "\f058";
  font-family: "Font Awesome 6 Free";
  font-weight: 900;
  color: #d6a106;
  position: absolute;
  left: 0;
}

/* CTA */
.estructuras-cta {
  margin-top: 55px;
  padding: 40px 25px;
  border-radius: 24px;
  background: linear-gradient(
    135deg,
    rgba(214,161,6,.15),
    rgba(255,255,255,.04)
  );
}

/* RESPONSIVE */
@media (max-width: 768px) {

  .estructuras-hero {
    min-height: 55vh;
  }

  .estructuras-hero h1 {
    font-size: 2rem;
  }

  .estructuras-hero p {
    font-size: .97rem;
  }

  .estructuras-destacado {
    padding: 22px;
  }
}

@media (max-width: 576px) {

  .estructuras-hero h1 {
    font-size: 1.7rem;
  }

  .btn-primary {
    width: 100%;
    max-width: 260px;
  }

}