.gallery-h1 {
  text-align: center;
  font-style: normal;
  font-size: 4rem;
  font-family: 'Playwrite IE', cursive;
  font-weight: 400;
  margin-bottom: 3rem;
  text-shadow:
    0 0 4px #a8d8ff,
    0 0 12px #4db8ff,
    0 0 30px #4db8ff,
    0 0 60px #0088ff;
  color: #fff;
  animation: neon-flicker 6s step-end infinite;
}

@keyframes neon-flicker {
  0%   { opacity: 1; text-shadow: 0 0 4px #fff, 0 0 12px #fff, 0 0 30px #fff, 0 0 60px #fff; }
  2%   { opacity: 0.8; text-shadow: none; }
  4%   { opacity: 1; text-shadow: 0 0 4px #fff, 0 0 12px #fff, 0 0 30px #fff, 0 0 60px #fff; }
  8%   { opacity: 1; text-shadow: 0 0 4px #fff, 0 0 12px #fff, 0 0 30px #fff, 0 0 60px #fff; }
  10%  { opacity: 0.6; text-shadow: none; }
  11%  { opacity: 1; text-shadow: 0 0 4px #fff, 0 0 12px #fff, 0 0 30px #fff, 0 0 60px #fff; }
  40%  { opacity: 1; text-shadow: 0 0 4px #fff, 0 0 12px #fff, 0 0 30px #fff, 0 0 60px #fff; }
  42%  { opacity: 0; text-shadow: none; }
  43%  { opacity: 1; text-shadow: 0 0 4px #fff, 0 0 12px #fff, 0 0 30px #fff, 0 0 60px #fff; }
  44%  { opacity: 0; text-shadow: none; }
  45%  { opacity: 1; text-shadow: 0 0 4px #fff, 0 0 12px #fff, 0 0 30px #fff, 0 0 60px #fff; }
  70%  { opacity: 1; text-shadow: 0 0 4px #fff, 0 0 12px #fff, 0 0 30px #fff, 0 0 60px #fff; }
  72%  { opacity: 0; text-shadow: none; }
  73%  { opacity: 1; text-shadow: 0 0 4px #fff, 0 0 12px #fff, 0 0 30px #fff, 0 0 60px #fff; }
  100% { opacity: 1; text-shadow: 0 0 4px #fff, 0 0 12px #fff, 0 0 30px #fff, 0 0 60px #fff; }
}

/* GALLERY GRID */
#gallery {
  columns: 4 280px;
  column-gap: 0.75rem;
}

.gallery-item {
  break-inside: avoid;
  margin-bottom: 0.75rem;
  overflow: hidden;
  border-radius: 6px;
  cursor: pointer;
  position: relative;
  background: var(--surface);
}

.gallery-item img {
  width: 100%;
  display: block;
  transition: transform 0.4s ease, opacity 0.3s ease;
  opacity: 0;
}

.gallery-item img.loaded {
  opacity: 1;
}

.gallery-item:hover img {
  transform: scale(1.03);
}

.gallery-item::after {
  content: '';
  position: absolute;
  inset: 0;
  background: rgba(0,0,0,0);
  transition: background 0.3s;
  border-radius: 6px;
}

.gallery-item:hover::after {
  background: rgba(0,0,0,0.15);
}

/* LOADING */
.loading {
  text-align: center;
  color: var(--muted);
  font-size: 0.875rem;
  padding: 4rem 0;
  letter-spacing: 0.05em;
}

.loading.hidden {
  display: none;
}

/* FULLSCREEN VIEW */
.fs-view {
  display: none;
  position: fixed;
  inset: 0;
  z-index: 9999;
  align-items: center;
  justify-content: center;
}

.fs-view.open {
  display: flex;
}

.fs-backdrop {
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.92);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
}

.fs-content {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1.25rem;
  z-index: 1;
  max-width: 90vw;
  max-height: 90vh;
}

.fs-content img {
  max-width: 90vw;
  max-height: 80vh;
  object-fit: contain;
  border-radius: 6px;
  box-shadow: 0 32px 80px rgba(0,0,0,0.6);
  transition: opacity 0.3s ease;
}

.fs-content img.fs-img-hidden {
  opacity: 0;
}

/* FULLSCREEN SPINNER */
.fs-spinner {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  display: flex;
  align-items: center;
  pointer-events: none;
}

.fs-spinner.hidden {
  display: none;
}

.spinner {
  width: 36px;
  height: 36px;
  border: 2px solid rgba(255,255,255,0.1);
  border-top-color: rgba(255,255,255,0.7);
  border-radius: 50%;
  animation: spin 0.75s linear infinite;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

.fs-controls {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.fs-btn {
  background: rgba(255,255,255,0.08);
  color: var(--text);
  border: 1px solid rgba(255,255,255,0.12);
  padding: 0.5rem 1.1rem;
  border-radius: 999px;
  font-size: 0.875rem;
  cursor: pointer;
  transition: background 0.2s, border-color 0.2s;
  white-space: nowrap;
}

.fs-btn:hover {
  background: rgba(255,255,255,0.16);
  border-color: rgba(255,255,255,0.25);
}

.fs-btn-close {
  background: rgba(255, 60, 60, 0.15);
  border-color: rgba(255, 60, 60, 0.25);
}

.fs-btn-close:hover {
  background: rgba(255, 60, 60, 0.3);
}

.fs-btn-download {
  background: rgba(255,255,255,0.12);
  font-weight: 500;
}

.fs-counter {
  color: var(--muted);
  font-size: 0.8rem;
  letter-spacing: 0.06em;
}

/* KEYBOARD HINT */
@keyframes fadeout {
  0% { opacity: 1; }
  80% { opacity: 1; }
  100% { opacity: 0; }
}

/* RESPONSIVE */
@media (max-width: 600px) {
  nav { padding: 0 1rem; }
  main { padding-left: 0.75rem; padding-right: 0.75rem; }
  #gallery { columns: 2 140px; column-gap: 0.5rem; }
  .gallery-item { margin-bottom: 0.5rem; }
  .nav-links { gap: 1rem; }
}


/* FULLSCREEN SIDE PANEL LAYOUT */
.fs-content {
  flex-direction: row;
  gap: 2rem;
  max-width: 95vw;
}

.fs-image-wrap {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1.25rem;
}

.fs-content img {
  max-width: 75vw;
}

/* EXIF PANEL */
.fs-exif {
  width: 200px;
  min-width: 200px;
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
  align-self: center;
  position: absolute;
  right: -220px;
  top: 50%;
  transform: translateY(-50%);
}

.fs-exif-title {
  font-size: 0.65rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--muted);
  border-bottom: 1px solid var(--border);
  padding-bottom: 0.75rem;
}

.fs-exif-row {
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
}

.fs-exif-label {
  font-size: 0.65rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--muted);
}

.fs-exif-value {
  font-size: 0.875rem;
  color: var(--text);
}

.fs-exif-loading {
  font-size: 0.75rem;
  color: var(--muted);
  letter-spacing: 0.05em;
}

@media (max-width: 900px) {
  .fs-content {
    flex-direction: column;
  }
  .fs-content img {
    max-width: 90vw;
    max-height: 60vh;
  }
  .fs-exif {
    width: 100%;
    min-width: unset;
    flex-direction: row;
    flex-wrap: wrap;
    gap: 1rem;
    justify-content: center;
  }
  .fs-exif-title {
    width: 100%;
  }
}

/* EXIF PANEL POSITION FIX */
.fs-content {
  justify-content: center;
}

.fs-btn-exif {
  display: none;
  font-family: cursive;
  font-weight: 500;
}

@media (max-width: 1100px) {
  .fs-exif {
    position: static;
    transform: none;
    width: 100%;
    min-width: unset;
    flex-direction: row;
    flex-wrap: wrap;
    gap: 1rem;
    justify-content: center;
    display: none;
  }
  .fs-exif-display {
    display: flex;
    transition: display 1s ease;
  }
  .fs-btn-exif {
    display: block;
  }
  .fs-exif-title {
    width: 100%;
  }
  .fs-content {
    flex-direction: column;
  }
  .fs-content img {
    max-width: 90vw;
    max-height: 60vh;
  }
}