/* =========================================================
   Sanus Pharma — layout.css
   Contenedores, rejillas, estructura de secciones, fondo 3D
   ========================================================= */

/* ---- Fondo 3D fijo ---- */
.bg-canvas {
  position: fixed;
  inset: 0;
  width: 100%;
  height: 100%;
  z-index: var(--z-bg);
  pointer-events: none;
}

.bg-fallback {
  position: fixed;
  inset: 0;
  z-index: calc(var(--z-bg) - 1);
  pointer-events: none;
  background:
    radial-gradient(60% 55% at 78% 8%, rgba(92, 184, 232, .22), transparent 60%),
    radial-gradient(55% 50% at 12% 22%, rgba(20, 151, 212, .13), transparent 55%),
    radial-gradient(70% 60% at 50% 110%, rgba(10, 91, 133, .12), transparent 60%),
    var(--white);
}

/* ---- Contenedor ---- */
.container {
  width: 100%;
  max-width: var(--container);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.container--narrow {
  max-width: var(--container-narrow);
}

/* ---- Secciones ---- */
.section {
  position: relative;
  padding-block: var(--section-y);
  z-index: var(--z-base);
}

.section--tint {
  background: linear-gradient(180deg, rgba(243, 247, 251, 0), rgba(243, 247, 251, .85) 12%, rgba(243, 247, 251, .85) 88%, rgba(243, 247, 251, 0));
}

.section__head {
  max-width: 760px;
  margin-inline: auto;
  margin-bottom: clamp(1.6rem, 1.1rem + 2vw, 3rem);
  text-align: center;
}

.section__title {
  font-family: var(--font-display);
  font-size: var(--fs-h2);
  letter-spacing: -.01em;
  margin-top: .6rem;
}

.section__lead {
  margin-top: 1.1rem;
  font-size: var(--fs-lead);
  color: var(--text-soft);
}

/* ---- Rejillas reutilizables ---- */
.grid {
  display: grid;
  gap: clamp(1rem, .6rem + 1.4vw, 1.8rem);
}

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

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

/* ---- Hero ---- */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding-top: calc(var(--nav-h) + clamp(1.5rem, 5vw, 4rem));
  padding-bottom: clamp(3rem, 8vw, 6rem);
  z-index: var(--z-base);
}

.hero__inner {
  max-width: 940px;
  text-align: center;
  margin-inline: auto;
}

/* ---- Nosotros ---- */
.about-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: clamp(1rem, .6rem + 1.4vw, 1.8rem);
}

/* ---- Banda de estadísticas ---- */
.stats-band__grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: clamp(1rem, .6rem + 1.4vw, 2rem);
}

/* ---- CTA ---- */
.cta__card {
  display: grid;
  grid-template-columns: 1fr 1.1fr;
  gap: clamp(1.5rem, 1rem + 3vw, 4rem);
  align-items: start;
  padding: clamp(1.6rem, 1rem + 3vw, 3.5rem);
}

.form__row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
}

/* ---- Footer ---- */
.footer__grid {
  display: grid;
  grid-template-columns: 1.6fr 1fr 1fr 1fr;
  gap: clamp(1.5rem, 1rem + 3vw, 3.5rem);
  padding-block: clamp(3rem, 2rem + 4vw, 5rem);
}

.footer__bottom-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  flex-wrap: wrap;
  padding-block: 1.4rem;
}

/* =========================================================
   Responsive — breakpoints 900px y 500px
   ========================================================= */

@media (max-width: 900px) {
  .grid--3,
  .grid--4,
  .about-grid,
  .stats-band__grid {
    grid-template-columns: repeat(2, 1fr);
  }

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

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

@media (max-width: 500px) {
  .grid--3,
  .grid--4,
  .about-grid,
  .stats-band__grid,
  .form__row,
  .footer__grid {
    grid-template-columns: 1fr;
  }

  .footer__bottom-inner {
    flex-direction: column;
    text-align: center;
  }
}