opencode/packages/ui/src/components/select.css

[data-component="select"] {
  [data-slot="select-trigger"] {
    padding: 0 4px 0 8px;
    box-shadow: none;

    [data-slot="select-trigger-value"] {
      overflow: hidden;
      text-overflow: ellipsis;
      white-space: nowrap;
    }
    [data-slot="select-trigger-icon"] {
      width: 16px;
      height: 16px;
      flex-shrink: 0;
      color: var(--text-weak);
      transition: transform 0.1s ease-in-out;
    }
  }
}

[data-component="select-content"] {
  min-width: 4rem;
  overflow: hidden;
  border-radius: var(--radius-md);
  border-width: 1px;
  border-style: solid;
  border-color: var(--border-weak-base);
  background-color: var(--surface-raised-stronger-non-alpha);
  padding: 2px;
  box-shadow: var(--shadow-xs);
  z-index: 50;

  &[data-closed] {
    animation: select-close 0.15s ease-out;
  }

  &[data-expanded] {
    animation: select-open 0.15s ease-out;
  }

  [data-slot="select-content-list"] {
    overflow-y: auto;
    max-height: 12rem;
    white-space: nowrap;
    overflow-x: hidden;
    display: flex;
    flex-direction: column;
    gap: 2px;

    &:focus {
      outline: none;
    }
  }

  /* [data-slot="section"] { */
  /* } */

  [data-slot="select-item"] {
    position: relative;
    display: flex;
    align-items: center;
    padding: 0 6px 0 6px;
    border-radius: var(--radius-sm);

    /* text-12-medium */
    font-family: var(--font-family-sans);
    font-size: var(--font-size-small);
    font-style: normal;
    font-weight: var(--font-weight-medium);
    line-height: var(--line-height-large); /* 166.667% */
    letter-spacing: var(--letter-spacing-normal);

    color: var(--text-strong);

    transition:
      background-color 0.2s ease-in-out,
      color 0.2s ease-in-out;
    outline: none;
    user-select: none;

    &[data-highlighted] {
      background: var(--surface-raised-base-hover);
    }
    &[data-disabled] {
      background-color: var(--surface-raised-base);
      pointer-events: none;
    }
    [data-slot="select-item-indicator"] {
      margin-left: auto;
      width: 16px;
      height: 16px;
    }
    &:focus {
      outline: none;
    }
    &:hover {
      background: var(--surface-raised-base-hover);
    }
  }
}

@keyframes select-open {
  from {
    opacity: 0;
    transform: scale(0.95);
  }
  to {
    opacity: 1;
    transform: scale(1);
  }
}

@keyframes select-close {
  from {
    opacity: 1;
    transform: scale(1);
  }
  to {
    opacity: 0;
    transform: scale(0.95);
  }
}