/* ============================================================================
   layout.css — Grid, flex, breakpoints, contenedores
   ============================================================================ */

/* Contenedor principal */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--s-4);
}
@media (min-width: 768px)  { .container { padding: 0 var(--s-5); } }
@media (min-width: 1024px) { .container { padding: 0 var(--s-6); } }

/* Secciones */
.section {
  padding: var(--s-8) 0;
  position: relative;
}
@media (min-width: 768px) { .section { padding: var(--s-9) 0; } }

.section--compact { padding: var(--s-6) 0; }

/* Stack */
.stack > * + * { margin-top: var(--s-4); }
.stack-lg > * + * { margin-top: var(--s-6); }
.stack-sm > * + * { margin-top: var(--s-2); }

/* Grids */
.grid { display: grid; gap: var(--s-4); }
.grid-2 { grid-template-columns: 1fr; }
.grid-3 { grid-template-columns: 1fr; }
.grid-4 { grid-template-columns: 1fr; }
.grid-5 { grid-template-columns: 1fr; }

@media (min-width: 640px) {
  .grid-2 { grid-template-columns: repeat(2, 1fr); }
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
}
@media (min-width: 768px) {
  .grid-3 { grid-template-columns: repeat(3, 1fr); }
  .grid-5 { grid-template-columns: repeat(5, 1fr); gap: var(--s-3); }
}
@media (min-width: 1024px) {
  .grid-4 { grid-template-columns: repeat(4, 1fr); }
}

/* Flex helpers */
.flex { display: flex; }
.flex-col { flex-direction: column; }
.items-center { align-items: center; }
.items-start  { align-items: flex-start; }
.justify-between { justify-content: space-between; }
.justify-center  { justify-content: center; }
.gap-1 { gap: var(--s-1); }
.gap-2 { gap: var(--s-2); }
.gap-3 { gap: var(--s-3); }
.gap-4 { gap: var(--s-4); }
.gap-5 { gap: var(--s-5); }
.flex-wrap { flex-wrap: wrap; }

/* Utilidades de texto */
.t-center { text-align: center; }
.t-left   { text-align: left; }
.t-gold   { color: var(--c-gold); }
.t-white  { color: var(--c-white); }
.t-muted  { color: var(--c-gray-2); }
.t-up     { text-transform: uppercase; letter-spacing: .08em; }

/* Visibilidad responsive */
.show-mobile  { display: block; }
.show-desktop { display: none; }
@media (min-width: 768px) {
  .show-mobile  { display: none; }
  .show-desktop { display: block; }
}

/* Content-visibility: acelera secciones fuera de viewport */
.cv-auto {
  content-visibility: auto;
  contain-intrinsic-size: 900px;
}

/* Fade-in on scroll (solo modo FULL) */
.fade-in {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity .7s ease, transform .7s ease;
}
.fade-in.is-visible {
  opacity: 1;
  transform: translateY(0);
}

/* Progress bar de scroll (top) */
.scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  height: 3px;
  width: 0;
  background: linear-gradient(90deg, var(--c-gold), var(--c-gold-2));
  z-index: var(--z-modal);
  transition: width .05s linear;
}

/* Espacios negativos */
.mt-0 { margin-top: 0 !important; }
.mb-0 { margin-bottom: 0 !important; }