/* ==============================================
   FOTOS.HTML — grid 4 × 3
   ============================================== */

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --orange: #FF4500;
  --bg: #0f0f0f;
  --font-display: 'Anton', sans-serif;
  --font-body: 'Poppins', system-ui, sans-serif;
}

html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; text-size-adjust: 100%; }

body {
  background: var(--bg);
  color: #fff;
  font-family: var(--font-body);
  overflow-x: hidden;
}

/* ── Header ── */
.fotos-header {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  padding: 1.2rem 4vw;
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: rgba(15, 15, 15, 0.92);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}

.fotos-logo {
  font-family: var(--font-display);
  font-size: clamp(1rem, 2vw, 1.3rem);
  letter-spacing: 0.05em;
  color: #fff;
  text-decoration: none;
}
.fotos-logo:hover { color: var(--orange); }

.fotos-back {
  font-family: var(--font-body);
  font-size: 0.78rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: rgba(255, 255, 255, 0.5);
  text-decoration: none;
  display: flex;
  align-items: center;
  gap: 0.4rem;
  transition: color 0.2s;
}
.fotos-back:hover { color: #fff; }
.fotos-back:hover svg { transform: translateX(-3px); }
.fotos-back svg { transition: transform 0.2s; }

/* ── Grid 4 × 5 ── */
.fotos-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 3px;
  padding-top: 61px;
}

/* ── Celda ── */
.fotos-cell {
  position: relative;
  aspect-ratio: 3 / 4;
  overflow: hidden;
  background: #111;
  cursor: pointer;
}

.fotos-cell img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
  display: block;
  transition: transform 0.5s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

.fotos-cell:hover img {
  transform: scale(1.06);
}

/* Número de foto (visible solo en hover) */
.fotos-cell__num {
  position: absolute;
  bottom: 0.6rem;
  right: 0.8rem;
  font-family: var(--font-display);
  font-size: 0.7rem;
  letter-spacing: 0.1em;
  color: rgba(255, 255, 255, 0.35);
  opacity: 0;
  transition: opacity 0.3s;
  pointer-events: none;
}
.fotos-cell:hover .fotos-cell__num { opacity: 1; }

/* ── Responsive — tablet ── */
@media (max-width: 900px) {
  .fotos-grid { grid-template-columns: repeat(3, 1fr); }
}

/* ── Responsive — móvil ── */
@media (max-width: 560px) {
  .fotos-grid { grid-template-columns: repeat(2, 1fr); }

  .fotos-header {
    padding: 1rem 4vw;
  }

  .fotos-back {
    font-size: 0.7rem;
  }
}

/* ── Responsive — teléfono pequeño ── */
@media (max-width: 380px) {
  .fotos-grid { grid-template-columns: 1fr; }
}

/* ── Lightbox ── */
.lb {
  position: fixed;
  inset: 0;
  z-index: 9000;
  background: rgba(0, 0, 0, 0.93);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.25s;
}
.lb.lb--open {
  opacity: 1;
  pointer-events: auto;
}
.lb__img {
  max-width: 90vw;
  max-height: 88vh;
  object-fit: contain;
  display: block;
  transition: opacity 0.18s;
  border-radius: 2px;
}
.lb__img.lb--fade { opacity: 0; }

.lb__close {
  position: absolute;
  top: 1.2rem;
  right: 1.5rem;
  width: 44px;
  height: 44px;
  background: rgba(255,255,255,0.08);
  border: 1px solid rgba(255,255,255,0.15);
  border-radius: 50%;
  color: #fff;
  font-size: 1.1rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background 0.2s, transform 0.2s;
}
.lb__close:hover { background: rgba(255,69,0,0.5); transform: scale(1.08); }

.lb__arrow {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  width: 50px;
  height: 50px;
  background: rgba(255,255,255,0.08);
  border: 1px solid rgba(255,255,255,0.15);
  border-radius: 50%;
  color: #fff;
  font-size: 1.3rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background 0.2s, transform 0.2s;
  user-select: none;
}
.lb__arrow:hover { background: rgba(255,255,255,0.18); }
.lb__arrow--prev { left: 1.5rem; }
.lb__arrow--next { right: 1.5rem; }
.lb__arrow--prev:hover { transform: translateY(-50%) translateX(-3px); }
.lb__arrow--next:hover { transform: translateY(-50%) translateX(3px); }

.lb__counter {
  position: absolute;
  bottom: 1.4rem;
  left: 50%;
  transform: translateX(-50%);
  font-family: 'Poppins', sans-serif;
  font-size: 0.75rem;
  letter-spacing: 0.12em;
  color: rgba(255,255,255,0.35);
}

@media (max-width: 560px) {
  .lb__arrow--prev { left: 0.5rem; }
  .lb__arrow--next { right: 0.5rem; }
}