/* ================================================================
   Book Reader — Dark Mode
   Feature #16 | v1.1
   ================================================================ */

.ai501-book-reader[data-active-theme="dark"] {
    --br-bg:            #1A1714;
    --br-surface:       #252019;
    --br-text:          #E8E0D4;
    --br-text-muted:    #A89B8C;
    --br-accent:        #D4A574;
    --br-accent-hover:  #E8B888;
    --br-border:        #3D352A;
    --br-page-shadow:   rgba(0,0,0,0.3);
    --br-page-edge:     #302A22;
    --br-progress-bg:   #302A22;
    --br-progress-fill: #D4A574;
}

/* Ensure images in dark mode remain visible */
.ai501-book-reader[data-active-theme="dark"] .ai501-br-page img {
    /* Page images stay untouched — dark mode only affects surround */
    filter: none;
}

/* TOC thumbnails get a subtle border in dark */
.ai501-book-reader[data-active-theme="dark"] .ai501-br-toc-item img {
    border-color: #3D352A;
}

/* Zone hover in dark */
.ai501-book-reader[data-active-theme="dark"] .ai501-br-zone:hover {
    background: rgba(255,255,255,0.03);
}