/* ══════════════════════════════════════
   GALLERY OS — MAIN WINDOW
══════════════════════════════════════ */
.gos-window {
  width: 100%;
  border-radius: 16px;
  overflow: hidden;
  border: 1px solid rgba(255,255,255,0.07);
  background: rgba(8,8,14,0.97);
  box-shadow:
    0 0 0 1px rgba(184,71,245,0.06),
    0 0 60px rgba(184,71,245,0.06),
    0 40px 100px rgba(0,0,0,0.7);
  position: relative;
  transition: all 0.35s cubic-bezier(0.16,1,0.3,1);
}
.gos-window.minimized .gos-toolbar,
.gos-window.minimized .gos-statusbar,
.gos-window.minimized .gos-content {
  display: none;
}
.gos-window.maximized {
  position: fixed;
  inset: 10px;
  z-index: 999;
  border-radius: 12px;
  max-width: none;
}

/* ── Title Bar ── */
.gos-titlebar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.7rem 1.2rem;
  background: linear-gradient(90deg,
    rgba(184,71,245,0.07),
    rgba(0,212,255,0.04),
    rgba(184,71,245,0.05)
  );
  border-bottom: 1px solid rgba(255,255,255,0.05);
  position: relative;
  overflow: hidden;
}
.gos-titlebar::after {
  content: '';
  position: absolute;
  bottom: 0; left: -100%; height: 1px; width: 100%;
  background: linear-gradient(90deg, transparent, rgba(184,71,245,0.4), rgba(0,212,255,0.3), transparent);
  animation: gosShimmer 4s linear infinite;
}
@keyframes gosShimmer {
  from { left: -100%; }
  to   { left: 100%; }
}
.gos-dots { display: flex; gap: 0.45rem; }
.gos-dot {
  width: 13px; height: 13px; border-radius: 50%;
  cursor: pointer; transition: all 0.2s;
  box-shadow: 0 0 6px currentColor;
}
.gos-dot:hover { transform: scale(1.2); filter: brightness(1.3); }
.gos-titlebar-center {
  display: flex; align-items: center; gap: 0.5rem;
  font-size: 0.72rem; font-weight: 700; letter-spacing: 1.5px;
  color: rgba(255,255,255,0.45);
  font-family: 'JetBrains Mono', monospace;
}
.gos-titlebar-icon { font-size: 0.9rem; }
.gos-titlebar-right {
  font-size: 0.62rem; color: rgba(255,255,255,0.2);
  letter-spacing: 1px; font-family: 'JetBrains Mono', monospace;
}

/* ── Toolbar ── */
.gos-toolbar {
  display: flex;
  align-items: center;
  gap: 0.8rem;
  padding: 0.55rem 1.2rem;
  background: rgba(255,255,255,0.015);
  border-bottom: 1px solid rgba(255,255,255,0.04);
  flex-wrap: wrap;
}
.gos-toolbar-left { display: flex; gap: 0.3rem; flex-shrink: 0; }
.gos-nav-btn {
  width: 28px; height: 28px; border-radius: 7px;
  border: 1px solid rgba(255,255,255,0.07);
  background: transparent;
  color: rgba(255,255,255,0.35);
  font-size: 1rem; cursor: pointer;
  transition: all 0.2s;
  display: flex; align-items: center; justify-content: center;
}
.gos-nav-btn:not(:disabled):hover {
  border-color: rgba(184,71,245,0.4);
  color: var(--purple);
  background: rgba(184,71,245,0.06);
}
.gos-nav-btn:disabled { opacity: 0.25; cursor: not-allowed; }

/* filter tabs */
.gos-tabs {
  display: flex; gap: 0.25rem; flex: 1;
  overflow-x: auto; padding-bottom: 2px;
}
.gos-tabs::-webkit-scrollbar { display: none; }
.gos-tab {
  padding: 0.3rem 0.8rem; border-radius: 7px;
  border: 1px solid transparent;
  background: transparent;
  color: rgba(255,255,255,0.28);
  font-size: 0.65rem; font-weight: 700;
  letter-spacing: 1.5px; cursor: pointer;
  transition: all 0.2s; white-space: nowrap;
  font-family: 'JetBrains Mono', monospace;
}
.gos-tab:hover {
  color: rgba(255,255,255,0.6);
  background: rgba(255,255,255,0.04);
}
.gos-tab.active {
  border-color: rgba(184,71,245,0.35);
  color: var(--purple);
  background: rgba(184,71,245,0.07);
  box-shadow: 0 0 10px rgba(184,71,245,0.08);
}

/* view / sort */
.gos-toolbar-right { display: flex; align-items: center; gap: 0.4rem; flex-shrink: 0; }
.gos-view-btn {
  width: 28px; height: 28px; border-radius: 7px;
  border: 1px solid rgba(255,255,255,0.07);
  background: transparent; color: rgba(255,255,255,0.3);
  font-size: 0.85rem; cursor: pointer; transition: all 0.2s;
  display: flex; align-items: center; justify-content: center;
}
.gos-view-btn.active {
  border-color: rgba(0,212,255,0.3);
  color: var(--cyan);
  background: rgba(0,212,255,0.06);
}
.gos-view-btn:hover { color: var(--cyan); }
.gos-sort-btn {
  display: flex; align-items: center; gap: 0.35rem;
  padding: 0.3rem 0.65rem; border-radius: 7px;
  border: 1px solid rgba(255,255,255,0.07);
  background: transparent; color: rgba(255,255,255,0.3);
  font-size: 0.62rem; font-weight: 600; letter-spacing: 1px;
  cursor: pointer; transition: all 0.2s;
  font-family: 'JetBrains Mono', monospace;
}
.gos-sort-btn:hover {
  border-color: rgba(184,71,245,0.3);
  color: var(--purple);
}

/* ── Status Bar ── */
.gos-statusbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.35rem 1.2rem;
  background: rgba(255,255,255,0.01);
  border-bottom: 1px solid rgba(255,255,255,0.035);
  font-size: 0.6rem;
  color: rgba(255,255,255,0.2);
  letter-spacing: 1px;
  font-family: 'JetBrains Mono', monospace;
}
.gos-status-left { display: flex; align-items: center; gap: 0.45rem; }
.gos-status-dot {
  width: 5px; height: 5px; border-radius: 50%;
  background: #22c55e; box-shadow: 0 0 4px #22c55e;
  animation: blink 2s infinite;
}
.gos-breadcrumb { display: flex; align-items: center; gap: 0.3rem; }
.gos-breadcrumb-item {
  cursor: pointer; transition: color 0.2s;
}
.gos-breadcrumb-item:hover { color: var(--purple); }
.gos-breadcrumb-active { color: rgba(184,71,245,0.7) !important; cursor: default; }
.gos-breadcrumb-sep { color: rgba(255,255,255,0.1); }

/* ── Content ── */
.gos-content {
  padding: 1.2rem;
  min-height: 420px;
  background: rgba(5,5,10,0.8);
  position: relative;
}

/* ── Grid View ── */
.gos-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
  gap: 0.8rem;
}
.gos-item {
  border-radius: 12px;
  padding: 0.6rem;
  border: 1px solid rgba(255,255,255,0.04);
  background: rgba(255,255,255,0.015);
  cursor: pointer;
  transition: all 0.2s cubic-bezier(0.16,1,0.3,1);
  position: relative;
  user-select: none;
}
.gos-item:hover {
  border-color: rgba(184,71,245,0.25);
  background: rgba(184,71,245,0.04);
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(184,71,245,0.1);
}
.gos-item.selected {
  border-color: rgba(0,212,255,0.4);
  background: rgba(0,212,255,0.06);
  box-shadow: 0 0 0 2px rgba(0,212,255,0.15);
}
.gos-item-thumb {
  width: 100%; aspect-ratio: 1;
  border-radius: 8px; overflow: hidden;
  background: rgba(255,255,255,0.03);
  position: relative; margin-bottom: 0.5rem;
}
.gos-item-thumb img {
  width: 100%; height: 100%; object-fit: cover;
  transition: transform 0.3s ease;
  display: block;
}
.gos-item:hover .gos-item-thumb img { transform: scale(1.06); }

/* check overlay */
.gos-item-check {
  position: absolute; top: 6px; left: 6px;
  width: 20px; height: 20px; border-radius: 50%;
  background: rgba(0,212,255,0.9);
  display: flex; align-items: center; justify-content: center;
  font-size: 0.6rem; color: #000; font-weight: 900;
  opacity: 0; transition: opacity 0.2s;
  z-index: 2;
}
.gos-item.selected .gos-item-check { opacity: 1; }

/* type badge */
.gos-item-type-badge {
  position: absolute; bottom: 6px; right: 6px;
  font-size: 0.48rem; font-weight: 700; letter-spacing: 1px;
  padding: 0.15rem 0.45rem; border-radius: 5px;
  background: rgba(184,71,245,0.15);
  color: var(--purple);
  border: 1px solid rgba(184,71,245,0.3);
  font-family: 'JetBrains Mono', monospace;
}
.gos-item-name {
  font-size: 0.72rem; font-weight: 600;
  color: rgba(255,255,255,0.7);
  white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
  margin-bottom: 0.15rem;
}
.gos-item-meta {
  font-size: 0.58rem; color: rgba(255,255,255,0.2);
  letter-spacing: 0.5px;
  font-family: 'JetBrains Mono', monospace;
}

/* glitch-in animation */
@keyframes gosItemIn {
  0%   { opacity:0; transform: scale(0.85) translateY(8px); }
  60%  { transform: scale(1.03) translateY(-2px); }
  100% { opacity:1; transform: scale(1) translateY(0); }
}
.gos-item.anim-in { animation: gosItemIn 0.35s cubic-bezier(0.16,1,0.3,1) forwards; }

/* ── List View ── */
.gos-list { width: 100%; }
.gos-list-header {
  display: grid;
  grid-template-columns: 1fr 100px 80px 90px;
  padding: 0.45rem 0.8rem;
  border-bottom: 1px solid rgba(255,255,255,0.05);
  font-size: 0.6rem; font-weight: 700; letter-spacing: 2px;
  color: rgba(255,255,255,0.2);
  font-family: 'JetBrains Mono', monospace;
}
.gos-list-row {
  display: grid;
  grid-template-columns: 1fr 100px 80px 90px;
  align-items: center;
  padding: 0.5rem 0.8rem;
  border-radius: 8px;
  cursor: pointer; transition: background 0.15s;
  border: 1px solid transparent;
}
.gos-list-row:hover {
  background: rgba(184,71,245,0.04);
  border-color: rgba(184,71,245,0.12);
}
.gos-list-row.selected {
  background: rgba(0,212,255,0.05);
  border-color: rgba(0,212,255,0.2);
}
.gos-list-row-name {
  display: flex; align-items: center; gap: 0.6rem;
  font-size: 0.78rem; color: rgba(255,255,255,0.65);
}
.gos-list-row-thumb {
  width: 32px; height: 32px; border-radius: 6px;
  object-fit: cover; border: 1px solid rgba(255,255,255,0.07);
  flex-shrink: 0;
}
.gos-list-col {
  font-size: 0.65rem; color: rgba(255,255,255,0.25);
  font-family: 'JetBrains Mono', monospace;
}

/* ── Empty State ── */
.gos-empty {
  display: flex; flex-direction: column; align-items: center;
  justify-content: center; padding: 4rem 2rem; gap: 0.8rem;
}
.gos-empty-icon { font-size: 2.5rem; opacity: 0.3; }
.gos-empty-text { font-size: 0.82rem; color: rgba(255,255,255,0.2); }
.gos-empty-btn {
  padding: 0.4rem 1.2rem; border-radius: 999px;
  border: 1px solid rgba(184,71,245,0.3);
  background: transparent; color: var(--purple);
  font-size: 0.72rem; cursor: pointer; transition: all 0.2s;
}
.gos-empty-btn:hover { background: rgba(184,71,245,0.08); }

/* ── Context Menu ── */
.gos-context-menu {
  position: fixed; z-index: 9998;
  min-width: 180px; border-radius: 12px;
  background: rgba(10,10,18,0.97);
  border: 1px solid rgba(255,255,255,0.08);
  box-shadow: 0 8px 40px rgba(0,0,0,0.6), 0 0 0 1px rgba(184,71,245,0.05);
  backdrop-filter: blur(20px);
  padding: 0.4rem;
  display: none;
  animation: gosContextIn 0.15s ease;
}
@keyframes gosContextIn {
  from { opacity:0; transform: scale(0.95) translateY(-4px); }
  to   { opacity:1; transform: scale(1) translateY(0); }
}
.gos-context-menu.show { display: block; }
.gos-ctx-item {
  display: flex; align-items: center; gap: 0.6rem;
  padding: 0.5rem 0.8rem; border-radius: 8px;
  font-size: 0.75rem; cursor: pointer;
  color: rgba(255,255,255,0.55);
  transition: all 0.15s;
}
.gos-ctx-item:hover {
  background: rgba(184,71,245,0.08);
  color: rgba(255,255,255,0.85);
}
.gos-ctx-divider {
  height: 1px; background: rgba(255,255,255,0.05);
  margin: 0.25rem 0;
}

/* ── Scanlines ── */
.gos-scanlines {
  position: absolute; inset: 0; pointer-events: none;
  background: repeating-linear-gradient(
    0deg, transparent, transparent 3px,
    rgba(184,71,245,0.012) 3px, rgba(184,71,245,0.012) 4px
  );
  border-radius: 16px;
}

/* ══════════════════════════════════════
   GALLERY OS — PREVIEW WINDOW (Lightbox)
══════════════════════════════════════ */
.gos-preview-overlay {
  position: fixed; inset: 0;
  background: rgba(3,3,6,0.92);
  backdrop-filter: blur(20px);
  z-index: 9999;
  display: flex; align-items: center; justify-content: center;
  opacity: 0; pointer-events: none;
  transition: opacity 0.25s ease;
}
.gos-preview-overlay.open {
  opacity: 1; pointer-events: all;
}
.gos-preview-window {
  width: min(1000px, 95vw);
  max-height: 92vh;
  border-radius: 16px;
  border: 1px solid rgba(255,255,255,0.07);
  background: rgba(6,6,12,0.99);
  box-shadow: 0 0 80px rgba(184,71,245,0.15), 0 40px 80px rgba(0,0,0,0.8);
  overflow: hidden;
  display: flex; flex-direction: column;
  animation: gosPreviewIn 0.3s cubic-bezier(0.16,1,0.3,1);
}
@keyframes gosPreviewIn {
  from { opacity:0; transform: scale(0.92) translateY(20px); }
  to   { opacity:1; transform: scale(1) translateY(0); }
}
.gos-preview-titlebar {
  display: flex; align-items: center; justify-content: space-between;
  padding: 0.65rem 1.2rem;
  background: rgba(184,71,245,0.05);
  border-bottom: 1px solid rgba(255,255,255,0.05);
  flex-shrink: 0;
}
.gos-preview-title-center {
  font-size: 0.72rem; color: rgba(255,255,255,0.4);
  letter-spacing: 1px; font-family: 'JetBrains Mono', monospace;
}
.gos-preview-body {
  display: grid;
  grid-template-columns: 1fr 230px;
  flex: 1; min-height: 0;
}
.gos-preview-img-wrap {
  position: relative; background: rgba(0,0,0,0.4);
  display: flex; align-items: center; justify-content: center;
  overflow: hidden; min-height: 400px;
}
.gos-preview-img {
  max-width: 100%; max-height: calc(92vh - 140px);
  object-fit: contain; border-radius: 4px;
  transition: opacity 0.2s ease;
  user-select: none;
}
.gos-preview-img.fading { opacity: 0; }

/* nav arrows */
.gos-prev-arrow {
  position: absolute; top: 50%; transform: translateY(-50%);
  width: 42px; height: 42px; border-radius: 50%;
  border: 1px solid rgba(255,255,255,0.1);
  background: rgba(0,0,0,0.5);
  color: rgba(255,255,255,0.5);
  font-size: 1.3rem; cursor: pointer;
  transition: all 0.2s; display: flex;
  align-items: center; justify-content: center;
  backdrop-filter: blur(4px);
}
.gos-prev-arrow:hover { background: rgba(184,71,245,0.2); color: #fff; border-color: rgba(184,71,245,0.4); }
.gos-prev-arrow.left  { left: 12px; }
.gos-prev-arrow.right { right: 12px; }
.gos-zoom-hint {
  position: absolute; bottom: 10px; left: 50%; transform: translateX(-50%);
  font-size: 0.55rem; color: rgba(255,255,255,0.12);
  letter-spacing: 1px; font-family: 'JetBrains Mono', monospace;
  pointer-events: none;
}

/* sidebar */
.gos-preview-sidebar {
  border-left: 1px solid rgba(255,255,255,0.05);
  padding: 1.2rem;
  overflow-y: auto;
  display: flex; flex-direction: column; gap: 0;
  background: rgba(0,0,0,0.2);
}
.gos-preview-sidebar::-webkit-scrollbar { width: 2px; }
.gos-preview-sidebar::-webkit-scrollbar-thumb { background: rgba(184,71,245,0.3); border-radius: 2px; }
.gos-prev-section { margin-bottom: 0; }
.gos-prev-section-title {
  font-size: 0.55rem; letter-spacing: 3px;
  color: rgba(184,71,245,0.5);
  font-family: 'JetBrains Mono', monospace;
  margin-bottom: 0.7rem;
}
.gos-prev-info-row {
  display: flex; justify-content: space-between;
  align-items: flex-start; gap: 0.5rem;
  padding: 0.35rem 0;
  border-bottom: 1px solid rgba(255,255,255,0.03);
}
.gos-prev-info-key {
  font-size: 0.62rem; color: rgba(255,255,255,0.2);
  font-family: 'JetBrains Mono', monospace;
  flex-shrink: 0;
}
.gos-prev-info-val {
  font-size: 0.65rem; color: rgba(255,255,255,0.55);
  text-align: right; word-break: break-word;
}
.gos-prev-divider {
  height: 1px; background: rgba(255,255,255,0.04);
  margin: 0.9rem 0;
}
.gos-prev-counter {
  font-size: 0.65rem; color: rgba(255,255,255,0.25);
  font-family: 'JetBrains Mono', monospace;
  margin-bottom: 0.7rem;
}

/* thumbnail strip */
.gos-prev-strip {
  display: flex; flex-wrap: wrap; gap: 0.35rem;
}
.gos-prev-strip-thumb {
  width: 44px; height: 44px; border-radius: 6px;
  object-fit: cover;
  border: 2px solid transparent;
  opacity: 0.4; cursor: pointer; transition: all 0.2s;
}
.gos-prev-strip-thumb:hover { opacity: 0.7; }
.gos-prev-strip-thumb.active {
  border-color: var(--purple);
  opacity: 1;
  box-shadow: 0 0 8px rgba(184,71,245,0.4);
}
.gos-prev-close-btn {
  width: 100%; padding: 0.55rem;
  border-radius: 999px;
  border: 1px solid rgba(255,255,255,0.08);
  background: transparent; color: rgba(255,255,255,0.3);
  font-size: 0.68rem; letter-spacing: 2px;
  cursor: pointer; transition: all 0.2s;
  font-family: 'JetBrains Mono', monospace;
}
.gos-prev-close-btn:hover {
  border-color: rgba(245,71,168,0.4);
  color: var(--pink);
}

/* tag chips in preview */
.gos-prev-tag {
  padding: 0.2rem 0.55rem; border-radius: 6px;
  font-size: 0.58rem; font-weight: 700;
  background: rgba(184,71,245,0.1);
  border: 1px solid rgba(184,71,245,0.25);
  color: var(--purple);
  font-family: 'JetBrains Mono', monospace;
}

/* responsive */
@media (max-width: 768px) {
  .gos-preview-body { grid-template-columns: 1fr; }
  .gos-preview-sidebar { display: none; }
  .gos-grid { grid-template-columns: repeat(auto-fill, minmax(120px, 1fr)); }
  .gos-toolbar { gap: 0.5rem; }
  .gos-tabs { gap: 0.2rem; }
}