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

:root {
  --bg: #000;
  --cell-bg: #141414;
  --cell-border: #222;
  --text: #e8e8e8;
  --text-muted: #666;
  --cell-size: 100px;
  --cell-padding: 10px;
  --wide-cols: 4;
  --wide-rows: 3;
}

html, body {
  height: 100%;
  overflow: hidden;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
  -webkit-font-smoothing: antialiased;
}

.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  padding: 20px 24px;
  background: linear-gradient(to bottom, rgba(0, 0, 0, 0.95) 60%, transparent);
  pointer-events: none;
}

.header-inner {
  pointer-events: auto;
}

.header h1 {
  font-size: 14px;
  font-weight: 500;
  letter-spacing: 0.02em;
}

.header-meta {
  font-size: 11px;
  color: var(--text-muted);
  margin-top: 4px;
  max-width: min(72vw, 520px);
  line-height: 1.45;
  letter-spacing: 0.01em;
}

body.is-loading .header {
  opacity: 0;
  visibility: hidden;
}

body.is-loading .viewport {
  pointer-events: none;
}

.viewport {
  width: 100vw;
  height: 100vh;
  cursor: grab;
  overflow: hidden;
  background: var(--bg);
}

.viewport.dragging {
  cursor: grabbing;
}

.viewport.dragging .cell::after,
.viewport.dragging .cell:hover::after {
  border-color: transparent;
  background-color: transparent;
}

.viewport.dragging .canvas .cell img,
.viewport.dragging .canvas .cell video,
.viewport.dragging .canvas .cell:hover img,
.viewport.dragging .canvas .cell:hover video {
  filter: grayscale(100%);
}

.canvas {
  position: absolute;
  inset: 0;
  overflow: visible;
  transform: translate3d(0, 0, 0);
}

.viewport.dragging .canvas {
  will-change: transform;
}

.cell {
  position: absolute;
  width: var(--cell-size);
  height: var(--cell-size);
  background: transparent;
  overflow: hidden;
  cursor: pointer;
  outline: none;
  -webkit-tap-highlight-color: transparent;
  user-select: none;
}

.cell-loading::before {
  content: '';
  position: absolute;
  z-index: 0;
  background: #2a2a2a;
  animation: cell-pulse 1.8s ease-in-out infinite;
  pointer-events: none;
}

.cell:not(.cell-wide).cell-loading::before {
  inset: var(--cell-padding);
}

.cell-wide.cell-loading::before {
  inset: 0;
}

@keyframes cell-pulse {
  0%, 100% { opacity: 0.3; }
  50% { opacity: 0.65; }
}

.cell::after {
  content: '';
  position: absolute;
  inset: 0;
  z-index: 1;
  box-sizing: border-box;
  border: 2px solid transparent;
  background-color: transparent;
  pointer-events: none;
  transition: background-color 0.1s ease, border-color 0.1s ease;
}

@media (hover: hover) and (pointer: fine) {
  .cell:hover::after {
    border-color: #FF00C3;
  }

  .cell:active::after {
    border-color: transparent;
    background-color: #FF00C3;
  }
}

.cell-wide {
  width: calc(var(--cell-size) * var(--wide-cols));
  height: calc(var(--cell-size) * var(--wide-rows));
  overflow: hidden;
}

.cell-wide img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
  padding: 0;
  display: block;
  pointer-events: none;
  user-select: none;
  opacity: 0;
  transition: opacity 0.15s ease;
}

.cell-wide img.is-loaded {
  opacity: 1;
}

.cell:not(.cell-wide) img {
  position: relative;
  z-index: 1;
  width: 100%;
  height: 100%;
  object-fit: contain;
  padding: var(--cell-padding);
  display: block;
  pointer-events: none;
  user-select: none;
  opacity: 0;
  transition: opacity 0.15s ease;
}

.cell:not(.cell-wide) img.is-loaded {
  opacity: 1;
}

body.uniform-cells .cell-fill img,
body.uniform-cells .cell-fill video {
  position: absolute;
  z-index: 1;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
  padding: 0;
  display: block;
  pointer-events: none;
  user-select: none;
  opacity: 0;
  transition: opacity 0.15s ease;
}

body.uniform-cells .cell-fill img.is-loaded,
body.uniform-cells .cell-fill video.is-loaded {
  opacity: 1;
}

body.uniform-cells .cell-fill.cell-loading::before {
  inset: 0;
}

body.uniform-cells .cell-icon img {
  position: relative;
  z-index: 1;
  width: 100%;
  height: 100%;
  object-fit: contain;
  object-position: center;
  padding: var(--cell-padding);
  display: block;
  pointer-events: none;
  user-select: none;
  opacity: 0;
  transition: opacity 0.15s ease;
}

body.uniform-cells .cell-icon img.is-loaded {
  opacity: 1;
}

body.uniform-cells .cell-icon.cell-loading::before {
  inset: var(--cell-padding);
}

.canvas .cell img,
.canvas .cell video {
  filter: grayscale(100%);
  transition: opacity 0.15s ease, filter 0.25s ease;
}

@media (hover: hover) and (pointer: fine) {
  .canvas .cell:hover img,
  .canvas .cell:hover video {
    filter: grayscale(0%);
  }
}

.load-error {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  font-size: 13px;
  color: var(--text-muted);
  text-align: center;
  line-height: 1.6;
}

.load-error code {
  color: var(--text);
  font-size: 12px;
}

.load-count {
  font-variant-numeric: tabular-nums;
}

.lightbox {
  position: fixed;
  inset: 0;
  z-index: 200;
  display: flex;
  align-items: center;
  justify-content: center;
  background: #000;
  cursor: pointer;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.2s ease;
}

.lightbox.open {
  opacity: 1;
  pointer-events: auto;
}

.lightbox-img,
.lightbox-video {
  width: min(90vw, 1200px);
  height: min(88vh, 1200px);
  max-width: min(90vw, 1200px);
  max-height: min(88vh, 1200px);
  object-fit: contain;
  pointer-events: none;
  user-select: none;
  background: transparent;
}

.lightbox-img:not([src]),
.lightbox-video:not([src]) {
  display: none;
}

.lightbox-video {
  display: none;
}

.lightbox.show-video .lightbox-img {
  display: none;
}

.lightbox.show-video .lightbox-video {
  display: block;
}

.lightbox-wide .lightbox-img,
.lightbox-wide .lightbox-video {
  width: min(96vw, 1600px);
  height: min(90vh, 960px);
  max-width: min(96vw, 1600px);
  max-height: min(90vh, 960px);
  object-fit: contain;
}

body.lightbox-open .viewport {
  pointer-events: none;
}

.zoom-control {
  position: fixed;
  top: 22px;
  right: 24px;
  z-index: 110;
  display: flex;
  align-items: center;
  gap: 2px;
  padding: 0;
  background: none;
  border: none;
}

.zoom-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  padding: 0;
  border: none;
  background: transparent;
  cursor: pointer;
  flex-shrink: 0;
}

.zoom-square {
  display: block;
  background: #fff;
  opacity: 0.28;
  transition: opacity 0.15s ease;
  pointer-events: none;
}

.zoom-btn[data-level="2"] .zoom-square {
  width: 5px;
  height: 5px;
}

.zoom-btn[data-level="1"] .zoom-square {
  width: 9px;
  height: 9px;
}

.zoom-btn[data-level="0"] .zoom-square {
  width: 14px;
  height: 14px;
}

@media (hover: hover) and (pointer: fine) {
  .zoom-btn:hover .zoom-square {
    opacity: 0.55;
  }

  .zoom-btn.active:hover .zoom-square {
    background: #FF00C3;
    opacity: 1;
  }
}

.zoom-btn.active .zoom-square {
  background: #FF00C3;
  opacity: 1;
}

body.is-loading .zoom-control,
body.lightbox-open .zoom-control {
  opacity: 0;
  pointer-events: none;
}

@media (max-width: 600px) {
  .zoom-control {
    top: auto;
    right: auto;
    left: 50%;
    bottom: max(20px, env(safe-area-inset-bottom, 0px));
    transform: translateX(-50%);
  }
}