:root {
  /* Color variables */
  --bg-color: #fff;
  --text-color: #333;
  --input-color: #fff;
  --focus-color: #f2f2f2;
  --accent-color: #2680d9;
  
  /* Spacing variables */
  --spacing-xs: 3px;
  --spacing-sm: 5px;
  --spacing-md: 7.5px;
  --spacing-lg: 15px;
  
  /* Grid layout variables */
  --grid-gap: var(--spacing-sm);
  --grid-column-count: 5;
  
  /* Animation variables */
  --transition-speed: 0.2s;
  --transition-function: ease;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg-color: #333;
    --text-color: #ddd;
    --input-color: #aaa;
    --focus-color: #555;
  }
}

body {
  background-color: var(--bg-color);
  color: var(--text-color);
}

#search-input {
  background-color: var(--input-color);
  width: 100%;
  padding: var(--spacing-md);
  border-radius: 4px;
  border: 1px solid var(--focus-color);
}

.site-bookmark-ul {
  padding-left: 0;
  margin-top: var(--spacing-md);
  display: flex;
  flex-wrap: wrap;
  gap: var(--grid-gap);
}

.site-bookmark-li {
  list-style: none;

  display: flex;
  flex-direction: column;
  justify-content: flex-start;
}

.site-bookmark-category {
  grid-column: 1 / -1; /* Spans all columns when using grid */
  width: 100%; /* Ensures full width in flexbox */
}

.site-bookmark-a {
  color: var(--text-color);
  padding: var(--spacing-xs) var(--spacing-md);
  border-radius: 4px;
  
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  
  text-decoration: none;
  transition: all var(--transition-speed) var(--transition-function);
}

.site-bookmark-a:hover,
.site-bookmark-a:focus,
.site-bookmark-a-focus {
  opacity: 1;
  text-decoration: none;
  background-color: var(--focus-color);
}

.site-bookmark-a:focus,
.site-bookmark-a-focus {
  outline: 3px auto var(--accent-color);
}

.site-bookmark-a:focus ~ .site-bookmark-a-focus {
  background-color: transparent;
}

.site-bookmark-img {
  padding: 16px 0 0 0;
  text-indent: -9999px;
  
  object-fit: contain;
  flex-shrink: 0; /* Prevents image from shrinking */
}

@media screen and (max-width: 640px) {
  .site-bookmark-li {
    line-height: 200%;
    width: 100%; /* Full width on small screens */
  }
  
  .site-bookmark-a {
    padding: var(--spacing-sm) var(--spacing-md);
    display: grid;
    grid-template-columns: 24px 1fr;
    align-items: center;
  }
}