:root {
    /* Colors */
    --color-primary: #333;
    --color-background: #fff;
    --color-border: rgba(0, 0, 0, 0.08);
    --color-hover: rgba(0, 0, 0, 0.02);
    --color-shadow: rgba(0, 0, 0, 0.1);
    --color-link: #007bff;

    /* Spacing */
    --spacing-xs: 4px;
    --spacing-sm: 8px;
    --spacing-md: 12px;
    --spacing-lg: 16px;

    /* Font sizes */
    --font-size-sm: 12px;
    --font-size-base: 14px;

    /* Border radius */
    --border-radius-sm: 4px;
    --border-radius-base: 8px;
}

/* Base playlist styles */
.bvideo_playlist {
    list-style: none;
    padding: 0;
    margin: 0;
    background: var(--color-background);
    border-radius: var(--border-radius-base);
    box-shadow: 0 2px 8px var(--color-shadow);
    overflow: hidden;
}

/* Playlist items */
.bvideo_playlist_item {
    border-bottom: 1px solid var(--color-border);
    transition: all 0.2s ease;
}

.bvideo_playlist,
.bvideo_playlist_item {
    list-style: none !important;
    list-style-type: none !important;
}

.bvideo_playlist_item:last-child {
    border-bottom: none;
}

.bvideo_playlist_item:hover {
    background-color: var(--color-hover);
}

/* Playing state */
.bvideo_playlist_item_playing {
    background-color: var(--playing-background-color);
}

/* Content layout */
.bvideo_playlist_item_content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-md) var(--spacing-lg);
}

.bvideo_video_info {
    display: flex;
    align-items: center;
    flex: 1;
    min-width: 0;
}

/* Icons */
.bvideo_status_icon,
.bvideo_playing_icon {
    font-size: var(--font-size-base);
    margin-right: var(--spacing-sm);
}

.bvideo_status_icon {
    opacity: 0.7;
}

.bvideo_playing_icon {
    display: none;
}

.bvideo_playlist_item_playing .bvideo_playing_icon {
    display: inline-block;
}

.bvideo_playlist_item_playing .bvideo_status_icon {
    display: none;
}

/* Video title */
.bvideo_video_title {
    font-size: var(--font-size-base);
    color: var(--color-primary);
    margin-right: var(--spacing-sm);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

/* Download button */
.bvideo_download_button {
    margin-left: var(--spacing-lg);
}

.bvideo_download_link {
    padding: 6px;
    border-radius: var(--border-radius-sm);
    transition: background-color 0.2s ease;
    text-decoration: none;
}

.bvideo_download_link:hover {
    background-color: var(--color-hover);
}

/* Links */
.bvideo_playlist a {
    text-decoration: none;
    color: inherit;
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

/* Scrollbar */
.bvideo_playlist::-webkit-scrollbar {
    width: var(--spacing-sm);
}

.bvideo_playlist::-webkit-scrollbar-track {
    background: rgba(0, 0, 0, 0.05);
    border-radius: var(--border-radius-sm);
}

.bvideo_playlist::-webkit-scrollbar-thumb {
    background: rgba(0, 0, 0, 0.2);
    border-radius: var(--border-radius-sm);
}

.bvideo_playlist::-webkit-scrollbar-thumb:hover {
    background: rgba(0, 0, 0, 0.3);
}

/* Controls */
.bvideo_controls {
    display: flex;
    align-items: center;
    gap: 10px;
    position: sticky;
    top: 0;
    z-index: 1000;
    background-color: var(--color-background);
    padding: 10px;
    box-shadow: 0 2px 5px var(--color-shadow);
}

/* Toggle button */
#bvideo_toggle_played_videos {
    display: inline-block;
    padding: 5px 10px;
    font-size: var(--font-size-sm);
    line-height: 1;
    background-color: #f4f4f4;
    border: 1px solid #ccc;
    border-radius: var(--border-radius-sm);
    cursor: pointer;
}

#bvideo_toggle_played_videos:hover {
    background-color: #eaeaea;
}

/* Common word items */
.bvideo_common_word_item {
    margin-right: 10px;
    cursor: pointer;
    color: var(--color-link);
}

.bvideo_common_word_item:hover {
    text-decoration: underline;
}