/**
 * picasso-mosaic.css
 * Propiedad Intelectual de Wilmet Sonco RUC 10411187581 Perú — Picasso Digital.
 *
 * Galería Mosaico (Bento Grid) con 3 estilos de hover:
 *   1. .pm-hover-blur   — Imagen se difumina, texto blanco aparece
 *   2. .pm-hover-overlay — Overlay oscuro/azul aparece con texto
 *   3. .pm-hover-reveal  — Texto se desliza desde abajo con borde de acento
 *
 * Responsivo:
 *   - Desktop (≥1024px): Layout mosaico completo con spans
 *   - Tablet  (640–1023px): 2 columnas, sin spans grandes
 *   - Mobile  (<640px): 1 columna, sin spans
 */

/* ============================================================
   VARIABLES Y TOKENS
   ============================================================ */
:root {
  --pm-gap: 4px;
  --pm-radius: 0px;
  --pm-cell-min-height: 260px;
  --pm-font: 'Inter', 'Segoe UI', system-ui, sans-serif;
  --pm-title-size: 1.1rem;
  --pm-desc-size: 0.875rem;
  --pm-transition: 0.45s cubic-bezier(0.4, 0, 0.2, 1);
  --pm-overlay-opacity: 0.72;
  /* Overlay colors */
  --pm-color-dark: rgba(0, 0, 0, var(--pm-overlay-opacity));
  --pm-color-blue: rgba(10, 50, 120, var(--pm-overlay-opacity));
  --pm-color-brand: var(--color-primary, rgba(10, 50, 120, 0.7));
  /* Reveal accent */
  --pm-reveal-accent: #2563eb;
  --pm-reveal-bar-height: 4px;
}

/* ============================================================
   SECCIÓN Y TÍTULO
   ============================================================ */
.picasso-mosaic-section {
  width: 100%;
  font-family: var(--pm-font);
}

.pm-section-title {
  text-align: center;
  font-size: 1rem;
  font-weight: 400;
  letter-spacing: 0.5em;
  text-transform: uppercase;
  color: #1a1a1a;
  margin: 0 0 24px;
  padding: 32px 16px 0;
}

/* ============================================================
   GRID PRINCIPAL (Desktop: 4 columnas)
   ============================================================ */
.pm-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  grid-auto-rows: var(--pm-cell-min-height);
  gap: var(--pm-gap);
}

/* ---- Spans de celda ---- */
.pm-span-normal   { grid-column: span 1; grid-row: span 1; }
.pm-span-wide     { grid-column: span 2; grid-row: span 1; }
.pm-span-tall     { grid-column: span 1; grid-row: span 2; }
.pm-span-featured { grid-column: span 2; grid-row: span 2; }

/* ============================================================
   CELDA BASE
   ============================================================ */
.pm-cell {
  position: relative;
  overflow: hidden;
  cursor: pointer;
  background-color: #111;
}

.pm-cell:focus-within {
  outline: 3px solid var(--pm-reveal-accent);
  outline-offset: 2px;
}

/* Imagen de fondo */
.pm-cell__image {
  position: absolute;
  inset: 0;
  background-size: cover;
  background-position: center center;
  background-repeat: no-repeat;
  transition: transform var(--pm-transition), filter var(--pm-transition);
  will-change: transform, filter;
}

/* Overlay (capa de color) */
.pm-cell__overlay {
  position: absolute;
  inset: 0;
  pointer-events: none;
}

/* Contenido de texto */
.pm-cell__content {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  padding: 20px 24px;
  color: #ffffff;
  z-index: 2;
  pointer-events: none;
  /* Fondo permanentemente oscuro abajo para que el texto blanco siempre se lea */
  background: linear-gradient(to top, rgba(0,0,0,0.85) 0%, rgba(0,0,0,0.4) 50%, transparent 100%);
}

.pm-cell__title {
  font-size: var(--pm-title-size);
  font-weight: 700;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  margin: 0 0 8px;
  line-height: 1.3;
  text-shadow: 0 1px 4px rgba(0, 0, 0, 0.6);
}

.pm-cell__description {
  font-size: var(--pm-desc-size);
  line-height: 1.55;
  margin: 0 0 12px;
  opacity: 0.92;
  text-shadow: 0 1px 3px rgba(0, 0, 0, 0.5);
}

.pm-cell__link {
  display: inline-block;
  color: #fff;
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-decoration: none;
  border-bottom: 1px solid rgba(255, 255, 255, 0.6);
  padding-bottom: 2px;
  pointer-events: auto;
  transition: border-color 0.2s;
}

.pm-cell__link:hover {
  border-color: #fff;
}

/* Enlace de toda la celda */
.pm-cell__full-link {
  position: absolute;
  inset: 0;
  z-index: 1;
  display: block;
}


/* ============================================================
   ESTILO 1: BLUR — Imagen se difumina + texto blanco aparece
   ============================================================ */
.pm-hover-blur .pm-cell__overlay {
  background: linear-gradient(to top,
    rgba(0, 0, 0, 0.7) 0%,
    rgba(0, 0, 0, 0.1) 50%,
    transparent 100%
  );
  opacity: 0;
  transition: opacity var(--pm-transition);
}

.pm-hover-blur .pm-cell__content {
  opacity: 1;
  transform: translateY(0);
  transition:
    opacity var(--pm-transition),
    transform var(--pm-transition);
}

/* Hover blur */
.pm-hover-blur .pm-cell:hover .pm-cell__image,
.pm-hover-blur .pm-cell:focus-within .pm-cell__image {
  filter: blur(5px) brightness(0.65);
  transform: scale(1.04);
}

.pm-hover-blur .pm-cell:hover .pm-cell__overlay,
.pm-hover-blur .pm-cell:focus-within .pm-cell__overlay {
  opacity: 1;
}

.pm-hover-blur .pm-cell:hover .pm-cell__content,
.pm-hover-blur .pm-cell:focus-within .pm-cell__content {
  opacity: 1;
  transform: translateY(0);
}


/* ============================================================
   ESTILO 2: OVERLAY — Fondo oscuro/azul desliza desde abajo
   ============================================================ */

/* Color del overlay según configuración */
.pm-hover-overlay.pm-overlay-dark .pm-cell__overlay  { --pm-ov-color: var(--pm-color-dark); }
.pm-hover-overlay.pm-overlay-blue .pm-cell__overlay  { --pm-ov-color: var(--pm-color-blue); }
.pm-hover-overlay.pm-overlay-brand .pm-cell__overlay { --pm-ov-color: var(--pm-color-brand); }

.pm-hover-overlay .pm-cell__overlay {
  background: var(--pm-ov-color, var(--pm-color-dark));
  transform: translateY(100%);
  transition: transform var(--pm-transition);
}

.pm-hover-overlay .pm-cell__image {
  transition: transform var(--pm-transition);
}

.pm-hover-overlay .pm-cell__content {
  opacity: 1;
  transform: translateY(0);
  transition:
    opacity 0.3s ease 0.1s,
    transform 0.3s ease 0.1s;
}

/* Hover overlay */
.pm-hover-overlay .pm-cell:hover .pm-cell__overlay,
.pm-hover-overlay .pm-cell:focus-within .pm-cell__overlay {
  transform: translateY(0);
}

.pm-hover-overlay .pm-cell:hover .pm-cell__image,
.pm-hover-overlay .pm-cell:focus-within .pm-cell__image {
  transform: scale(1.03);
}

.pm-hover-overlay .pm-cell:hover .pm-cell__content,
.pm-hover-overlay .pm-cell:focus-within .pm-cell__content {
  opacity: 1;
  transform: translateY(0);
}


/* ============================================================
   ESTILO 3: REVEAL — Texto siempre visible, fondo oscurece al hover
   ============================================================ */
.pm-hover-reveal .pm-cell__overlay {
  display: block;
  background: linear-gradient(to top,
    rgba(0, 0, 0, 0.9) 0%,
    rgba(0, 0, 0, 0.5) 60%,
    transparent 100%
  );
  opacity: 0.2; /* Ligeramente oscuro para dar contraste mínimo inicial */
  transition: opacity var(--pm-transition);
}

/* Barra de acento en la parte inferior */
.pm-hover-reveal .pm-cell::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: var(--pm-reveal-bar-height);
  background: var(--pm-reveal-accent);
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform 0.4s cubic-bezier(0.4, 0, 0.2, 1);
  z-index: 3;
}

.pm-hover-reveal .pm-cell__image {
  transition: transform var(--pm-transition);
}

.pm-hover-reveal .pm-cell__content {
  /* El texto SIEMPRE está visible */
  opacity: 1;
  transform: translateY(0);
}

/* Hover reveal */
.pm-hover-reveal .pm-cell:hover .pm-cell__image,
.pm-hover-reveal .pm-cell:focus-within .pm-cell__image {
  transform: scale(1.06);
}

.pm-hover-reveal .pm-cell:hover .pm-cell__overlay,
.pm-hover-reveal .pm-cell:focus-within .pm-cell__overlay {
  opacity: 0.9; /* Se oscurece fuertemente en hover */
}

.pm-hover-reveal .pm-cell:hover::after,
.pm-hover-reveal .pm-cell:focus-within::after {
  transform: scaleX(1);
}


/* ============================================================
   RESPONSIVE — Tablet (640px – 1023px): 2 columnas
   ============================================================ */
@media (max-width: 1023px) {
  .pm-grid {
    grid-template-columns: repeat(2, 1fr);
    grid-auto-rows: 220px;
  }

  /* En tablet: anular spans grandes, máx 2 cols */
  .pm-span-wide,
  .pm-span-featured { grid-column: span 2; grid-row: span 1; }
  .pm-span-tall     { grid-column: span 1; grid-row: span 2; }
  .pm-span-normal   { grid-column: span 1; grid-row: span 1; }
}

/* ============================================================
   RESPONSIVE — Mobile (<640px): 1 columna
   ============================================================ */
@media (max-width: 639px) {
  .pm-grid {
    grid-template-columns: 1fr;
    grid-auto-rows: 220px;
    gap: 3px;
  }

  /* En mobile: todas las celdas ocupan el ancho completo */
  .pm-span-wide,
  .pm-span-tall,
  .pm-span-featured,
  .pm-span-normal {
    grid-column: 1 !important;
    grid-row: span 1 !important;
  }

  /* En mobile: el hover siempre muestra el texto (touch) */
  .pm-hover-blur .pm-cell .pm-cell__content,
  .pm-hover-overlay .pm-cell .pm-cell__content,
  .pm-hover-reveal .pm-cell .pm-cell__content {
    opacity: 1;
    transform: translateY(0);
  }

  .pm-hover-blur .pm-cell .pm-cell__overlay,
  .pm-hover-overlay .pm-cell .pm-cell__overlay {
    opacity: 1;
    transform: translateY(0);
  }

  .pm-hover-overlay .pm-cell .pm-cell__overlay {
    transform: translateY(0);
  }

  .pm-hover-reveal .pm-cell::after {
    transform: scaleX(1);
  }

  .pm-cell__title { font-size: 1rem; }
  .pm-cell__description { font-size: 0.8rem; }
}

/* ============================================================
   ACCESIBILIDAD: reduce motion
   ============================================================ */
@media (prefers-reduced-motion: reduce) {
  .pm-cell__image,
  .pm-cell__overlay,
  .pm-cell__content,
  .pm-cell::after {
    transition: none !important;
  }
}