/* ========= BRAND DARK–BLUE ========= */
:root {
  --clr-primary: #4c8dff;
  --clr-bg-start: #09172e;
  --clr-bg-end: #000308;
  --clr-card: rgba(255, 255, 255, 0.04);
  --clr-card-border: rgba(255, 255, 255, 0.08);
  --radius: 14px;
  --shadow: 0 8px 25px rgba(0, 0, 0, 0.4);
}

/* ========= RESET ========= */
*,
*::before,
*::after {
  box-sizing: border-box;
}
html,
body {
  margin: 0;
  height: 100%;
  font-family: "Inter", sans-serif;
  color: #e6eaf5;
  background: var(--clr-bg-end);
  scroll-behavior: smooth;
}
img {
  max-width: 100%;
  display: block;
  border-radius: var(--radius);
}

/* ========= UTILITIES ========= */
.container {
  width: min(96%, 1200px);
  margin-inline: auto;
}
.section__heading {
  text-align: center;
  font-size: clamp(1.4rem, 3.5vw, 2rem);
  margin-bottom: 2rem;
}
.btn {
  display: inline-block;
  padding: 0.9rem 2.2rem;
  border-radius: var(--radius);
  font-weight: 600;
  text-decoration: none;
  transition: transform 0.2s;
}
.btn--primary {
  background: var(--clr-primary);
  color: #fff;
  box-shadow: 0 0 12px rgba(76, 141, 255, 0.5);
}
.btn--secondary {
  background: #fff;
  color: var(--clr-primary);
}
.btn:hover {
  transform: translateY(-3px);
}

/* ========= HERO ========= */
.hero {
  padding: 6rem 1rem 8rem;
  text-align: center;
  background: radial-gradient(
    circle at 50% 0,
    var(--clr-bg-start) 0%,
    var(--clr-bg-end) 70%
  );
}
.hero__logo {
  width: 100%;

  filter: drop-shadow(0 0 10px rgba(76, 141, 255, 0.6));
}
.hero__title {
  font-size: clamp(2.2rem, 7vw, 4.2rem);
  font-weight: 800;
  color: var(--clr-primary);
  margin: 1.2rem 0 0.5rem;
}
.hero__tagline {
  opacity: 0.8;
  line-height: 1.5;
  margin-bottom: 2.5rem;
}

/* ========= BENEFITS ========= */
.benefits {
  display: grid;
  gap: 1.5rem;
  margin-top: -4rem;
  padding-bottom: 3rem;
}
.card {
  background: var(--clr-card);
  border: 1px solid var(--clr-card-border);
  border-radius: var(--radius);
  backdrop-filter: blur(6px);
  padding: 2rem;
  text-align: center;
  box-shadow: var(--shadow);
}
.card__title {
  color: var(--clr-primary);
  margin-bottom: 0.7rem;
}

/* ========= GALLERY ========= */
.gallery {
  padding: 4rem 0;
}
.gallery__item {
  margin-bottom: 2.5rem;
  text-align: center;
}
.gallery__item figcaption {
  margin-top: 0.7rem;
  font-size: 0.9rem;
  opacity: 0.85;
}

/* ========= CTA ========= */
.cta {
  text-align: center;
  padding: 4rem 1rem 5rem;
  background: linear-gradient(
    180deg,
    var(--clr-bg-start) 0%,
    var(--clr-bg-end) 100%
  );
}
.cta__title {
  font-size: clamp(1.6rem, 5vw, 2.5rem);
  margin-bottom: 0.7rem;
}
.cta__text {
  opacity: 0.85;
  margin-bottom: 1.8rem;
}

/* ========= FOOTER ========= */
.footer {
  text-align: center;
  padding: 1rem 0 2rem;
  font-size: 0.8rem;
  opacity: 0.6;
}

/* === Lightbox ============================================================ */
.lightbox {
  position: fixed;
  inset: 0;
  display: none; /* se muestra con .is-visible */
  place-items: center;
  background: rgba(0, 0, 0, 0.85);
  z-index: 999;
  backdrop-filter: blur(2px);
}

.lightbox.is-visible {
  display: grid;
  animation: fadeIn 0.25s both;
}
.lightbox__img {
  max-width: 90vw;
  max-height: 90vh;
  border-radius: var(--radius);
  box-shadow: 0 0 30px rgba(0, 0, 0, 0.6);
}
.lightbox__close {
  position: absolute;
  top: 1.2rem;
  right: 1.2rem;
  font-size: 2rem;
  line-height: 1;
  padding: 0;
  background: none;
  border: none;
  color: #fff;
  cursor: pointer;
  filter: drop-shadow(0 0 4px rgba(0, 0, 0, 0.7));
}
@keyframes fadeIn {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}

/* ========= BREAKPOINTS ========= */
@media (min-width: 768px) {
    .hero__logo {
  width: 20%;

}
  .benefits {
    grid-template-columns: repeat(3, 1fr);
  }
  .gallery {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
  }
}