:root {
  --tile-border-width: 1px;
  --thumbnail-width: 320px;

  --tile-width: 30vw;
  --tile-max-width: var(--thumbnail-width);
  --tile-aspect-ratio: 16 / 9;
  --tile-shadow: 10px 10px 15px -10px rgba(0, 0, 0, 0.3);
  --tile-border: none;
  --gallery-gap: 0.5rem;

  --bg-color: #ffffff;
  --text-color: #000000;

  --dummy-bg: #f9f9f9;
  --dummy-border: #ccc;
  --dummy-text: #aaa;
  --dummy-bg-hover: #eee;
  --dummy-border-hover: #999;
  --dummy-text-hover: #666;

  --remove-bg: rgba(255 255 255 / 50%);
  --remove-text: #000000;
  --remove-border: unset;

  --edit-save-filter: grayscale(100%);

  --caption-bg: rgba(255, 255, 255, 0.6);
  --caption-text: rgba(0, 0, 0, 0.85);
}

@media (prefers-color-scheme: dark) {
  :root {
    --tile-shadow: none;
    --tile-border: var(--tile-border-width) solid rgba(255, 255, 255, 0.1);
    --tile-max-width: calc(var(--thumbnail-width) + calc(var(--tile-border-width) * 2));

    --bg-color: #121212;
    --text-color: #e0e0e0;

    --dummy-bg: #1e1e1e;
    --dummy-border: #333;
    --dummy-text: #777;
    --dummy-bg-hover: #252525;
    --dummy-border-hover: #555;
    --dummy-text-hover: #999;

    --remove-bg: rgba(0, 0, 0, 0.6);
    --remove-text: #ffffff;
    --remove-border: 1px solid #444;

    --edit-save-filter: grayscale(100%) brightness(1.6);

    --caption-bg: rgba(0, 0, 0, 0.6);
    --caption-text: rgba(255, 255, 255, 0.85);
  }
}

body {
  margin: 0;
  min-height: 100dvh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  background-color: var(--bg-color);
  color: var(--text-color);
}

#gallery {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: var(--gallery-gap);
  padding: 2rem 0.1rem 6rem;
  margin: 0 auto;
}

#gallery .video-tile,
#gallery .dummy-tile {
  position: relative;
  width: var(--tile-width);
  max-width: var(--tile-max-width);
  aspect-ratio: var(--tile-aspect-ratio);
  box-sizing: border-box;
  box-shadow: var(--tile-shadow);
  border: var(--tile-border);
  overflow: hidden;
}

#gallery.edit .video-tile,
#gallery.edit .video-tile a,
#gallery.edit .dummy-tile {
  cursor: grab;
}

.dummy-tile {
  display: none;
  align-items: center;
  justify-content: center;
  background-color: var(--dummy-bg);
  border: 2px dashed var(--dummy-border);
  padding: 0;
  font-size: 3rem;
  color: var(--dummy-text);
  cursor: pointer !important;
}

#gallery.edit .dummy-tile,
#gallery.empty-state .dummy-tile {
  display: flex;
}

#gallery img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

#gallery .remove {
  display: none;
}

#gallery.edit .remove {
  display: inline-block;
  position: absolute;
  top: 0;
  right: 0;
  z-index: 10;
  width: 32px;
  height: 32px;
  background-color: var(--remove-bg);
  border: var(--remove-border);
  border-radius: 50%;
  color: var(--remove-text);
  font-size: 1rem;
  cursor: pointer;
  transition: transform 0.2s ease;
}

#edit_save {
  background: transparent;
  border: none;
  padding: 0;
  position: fixed;
  bottom: calc(1.5rem + env(safe-area-inset-bottom));
  right: 1.5rem;
  z-index: 99999;
  width: 3.5rem;
  height: 3.5rem;
  filter: var(--edit-save-filter);
  pointer-events: auto;
  cursor: pointer;
  transition: transform 0.2s ease;
}

@media (min-width: 768px) {
  #edit_save {
    bottom: 1rem;
    right: 1rem;
    width: 2.5rem;
    height: 2.5rem;
  }
}

.dummy-tile:focus-visible,
#gallery.edit .remove:focus-visible,
#edit_save:focus-visible {
  outline: 3px solid #007bff;
  outline-offset: 2px;
}

@media (hover: hover) {
  .dummy-tile:hover {
    background-color: var(--dummy-bg-hover);
    border-color: var(--dummy-border-hover);
    color: var(--dummy-text-hover);
    transition: all 0.2s ease;
  }

  #gallery.edit .remove:hover,
  #edit_save:hover {
    transform: scale(1.1);
  }
}

.sortable-fallback {
  cursor: grabbing !important;
}

body.sortable-dragging,
body.sortable-dragging * {
  cursor: grabbing !important;
}

.pswp__custom-caption {
  position: absolute;
  right: 0.1rem;
  bottom: 0.1rem;
  max-width: 100vw;
  padding: 4px 10px;
  background: var(--caption-bg);
  border-radius: 4px;
  color: var(--caption-text);
  font-size: 14px;
  text-align: right;
  word-break: break-all;
}