:root {
  --color: rgba(255, 255, 245, 0.86);
  --bg-color: #111;

  --list-gap: 6px;

  --item-border-radius: 6px;
  --item-height: 40px;
  --item-padding-inline: 12px;

  --item-color: rgba(255, 255, 245, 0.86);
  --item-color-hover: rgba(255, 255, 245, 0.9);
  --item-color-focus: #fff;
  --item-color-dragging: rgba(255, 255, 245, 1);
  --item-bg-color: #222;
  --item-bg-color-hover: #2a2a2a;
  --item-bg-color-focus: #333;
  --item-bg-color-dragging: #1a3a1a;
  --item-border-color: #333;
  --item-border-color-hover: #444;
  --item-border-color-focus: #555;
  --item-border-color-dragging: #55ff9c;
}

* {
  box-sizing: border-box;
}

html {
  height: 100%;
  background: var(--bg-color);
  color: var(--color);
  background-size: 40px 40px;
  background-image:
    linear-gradient(to right, rgba(255, 255, 255, 0.1) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(255, 255, 255, 0.1) 1px, transparent 1px);
}

body {
  margin: 0;
  font-family:
    system-ui,
    -apple-system,
    BlinkMacSystemFont,
    'Segoe UI',
    Roboto,
    sans-serif;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  margin: -1px;
  padding: 0;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  clip-path: inset(100%);
  border: 0;
  white-space: nowrap;
}

#drag-container {
  position: fixed;
  inset: 0;
  pointer-events: none;
  contain: layout;
  z-index: 9999;
}

#sortable-list {
  position: relative;
  list-style: none;
  margin: 0;
  padding: 20px 0;
  width: 100%;
  max-width: 400px;
  margin-inline: auto;
  display: flex;
  flex-direction: column;
  gap: var(--list-gap);
}

.sortable-item {
  list-style: none;
  overflow-anchor: none;
  margin: 0;
  padding: 0;
  border-radius: var(--item-border-radius);

  &.placeholder {
    opacity: 0.4;
  }

  &.a11y-dragging {
    position: relative;
    z-index: 1;
  }

  &.drag-preview {
    pointer-events: none;
    z-index: 1000;
  }

  & a {
    display: flex;
    align-items: center;
    height: var(--item-height);
    padding: 0 var(--item-padding-inline);
    color: var(--item-color);
    background: var(--item-bg-color);
    border: 1px solid var(--item-border-color);
    touch-action: none;
    border-radius: inherit;
    text-decoration: none;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    cursor: pointer;
    outline: none;
    user-select: none;
    -webkit-tap-highlight-color: transparent;
    -webkit-touch-callout: none;

    box-shadow: 0 4px 16px rgba(0, 0, 0, 0);

    transition:
      color 150ms ease,
      background-color 150ms ease,
      border-color 150ms ease,
      box-shadow 150ms ease;

    :not(.is-dragging) > .sortable-item > &:hover {
      color: var(--item-color-hover);
      background: var(--item-bg-color-hover);
      border-color: var(--item-border-color-hover);
    }

    &:focus {
      outline: none;
    }

    &:focus-visible {
      color: var(--item-color-focus);
      background: var(--item-bg-color-focus);
      border-color: var(--item-border-color-focus);
      box-shadow: 0 0 0 2px var(--item-border-color-focus);
    }

    .sortable-item.drag-preview & {
      color: var(--item-color-dragging);
      background: var(--item-bg-color-dragging);
      border-color: var(--item-border-color-dragging);
      box-shadow: 0 4px 16px rgba(0, 0, 0, 0.4);
      cursor: grabbing;
    }

    .sortable-item.a11y-dragging & {
      color: var(--item-color-dragging);
      background: var(--item-bg-color-dragging);
      border-color: var(--item-border-color-dragging);
    }
  }
}