/* A quiet bookshelf and a viewport-sized reading surface. */
#readingModalBackdrop { --shelf-ink: var(--text); }
#readingModalBackdrop .reading-room-modal { background: var(--bg); }
#readingModalBackdrop .reading-room-header { position: relative; padding: 28px clamp(20px, 4vw, 56px) 16px; min-height: 88px; border: 0; background: var(--bg); }
#readingModalBackdrop .reading-room-header h2 { margin: 0; font-family: "Noto Serif SC Local", "Songti SC", serif; font-size: 1.65rem; font-weight: 500; letter-spacing: .03em; }
#readingModalBackdrop .eyebrow { font-size: .7rem; letter-spacing: .18em; color: var(--muted); }
#readingModalBackdrop .reading-room-subtitle { color: var(--muted); font-size: .85rem; }
#readingModalBackdrop .bookshelf-panel { padding: 8px clamp(20px, 4vw, 56px) 48px; }
.bookshelf-heading { display: flex; align-items: center; justify-content: space-between; gap: 16px; margin: 26px 0 16px; }
.bookshelf-heading h3 { margin: 0; font-family: "Noto Serif SC Local", serif; font-size: 1.15rem; }
.bookshelf-heading button { display: inline-flex; align-items: center; gap: 6px; }
.bookshelf-heading svg, .reading-search svg, .reader-toc-search svg { width: 18px; height: 18px; flex-shrink: 0; }
#readingModalBackdrop .bookshelf-toolbar { grid-template-columns: minmax(0, 1fr); gap: 10px; margin-bottom: 12px; }
#readingModalBackdrop .reading-search { grid-column: auto; height: 46px; background: var(--surface); border-color: var(--line); border-radius: 12px; }
.bookshelf-filters { display: flex; flex-wrap: wrap; gap: 10px; margin-bottom: 14px; }
.bookshelf-filters select { flex: 1; min-width: 130px; min-height: 42px; border: 1px solid var(--line); border-radius: 9px; padding: 6px 10px; color: var(--text); background: var(--surface); }
#readingModalBackdrop .reading-status { min-height: 30px; font-size: .8rem; }
#readingModalBackdrop .shelf-group-grid { grid-template-columns: repeat(auto-fill, minmax(140px, 180px)); gap: 28px 30px; }
#readingModalBackdrop .book-cover { aspect-ratio: 3 / 4; padding: 24px 18px; gap: 20px; border-radius: 3px 9px 9px 3px; box-shadow: inset 5px 0 8px #0002, 2px 6px 12px #0002; }
#readingModalBackdrop .book-cover > strong { font-family: "Noto Serif SC Local", serif; font-size: 1rem; font-weight: 500; letter-spacing: .02em; }
#readingModalBackdrop .book-cover-ornament { font-size: .6rem; letter-spacing: .14em; border-width: 0 0 1px; padding-bottom: 8px; }
#readingModalBackdrop .book-card-info > strong { display: block; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; font-size: .95rem; font-weight: 500; line-height: 1.6; }
#readingModalBackdrop .book-card-info small { font-size: .72rem; margin: 6px 0 10px; }
#readingModalBackdrop .book-mini-action { width: 36px; height: 36px; border: 0; background: var(--surface-soft); }
#readingModalBackdrop .shelf-book-card .book-card-actions { display: none; }
#readingModalBackdrop .bookshelf-managing .book-card-actions { display: flex; }
#readingModalBackdrop .book-progress { display: none; }
#sidebar [data-sidebar-context="reading"] { display: none !important; }
.bookshelf-menu { position: absolute; right: clamp(20px, 4vw, 56px); top: calc(100% - 4px); z-index: 20; width: 210px; padding: 8px; display: grid; gap: 2px; border: 1px solid var(--line); border-radius: 14px; background: var(--surface); box-shadow: 0 10px 32px #0002; }
#readingModalBackdrop .bookshelf-menu button { justify-content: flex-start; border: 0; box-shadow: none; background: transparent; min-height: 46px; padding: 10px 12px; font-size: .85rem; text-align: left; }
#readingModalBackdrop .bookshelf-menu button:hover { background: var(--surface-soft); }
#readingModalBackdrop .reading-header-actions .icon-button { width: 44px; height: 44px; border: 0; background: transparent; box-shadow: none; }
#readingModalBackdrop .reading-header-actions svg { width: 24px; height: 24px; }
.reading-continue-card { display: flex; align-items: center; gap: 24px; padding: 24px 28px; border: 1px solid var(--line); border-radius: 18px; background: radial-gradient(ellipse at 100% 0, var(--primary-soft), transparent 70%), var(--surface); }
.reading-continue-cover { display: grid; place-items: center; width: 76px; height: 102px; flex: 0 0 76px; border-radius: 3px 8px 8px 3px; color: #f9f3df; background: linear-gradient(135deg, #40584c, #6c7c62); box-shadow: 3px 5px 12px #0002; }
.reading-continue-cover svg { width: 32px; height: 32px; }
.reading-continue-copy { min-width: 0; flex: 1; }
.reading-continue-copy small { color: var(--muted); font-size: .75rem; }
.reading-continue-copy strong { display: block; margin: 8px 0; font: 500 1.15rem/1.6 "Noto Serif SC Local", serif; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.reading-continue-copy progress { display: block; width: min(100%, 280px); height: 4px; margin-top: 12px; accent-color: var(--primary); }
#readerPanel { --reader-paper: #f7f2e7; --reader-ink: #393a32; --reader-muted: #7c7b6d; --reader-line: #dcd8cb; --reader-chrome: #fcf9f1; --reader-accent: #526652; position: fixed; inset: 0; z-index: 100; width: 100%; height: 100dvh; max-height: 100dvh; overflow: hidden; background: var(--reader-paper); color: var(--reader-ink); }
#readerPanel[data-reader-theme="white"] { --reader-paper: #fff; --reader-ink: #303430; --reader-muted: #747a74; --reader-line: #e4e8e2; --reader-chrome: #fafbf9; }
#readerPanel[data-reader-theme="sage"] { --reader-paper: #e8eee3; --reader-ink: #354333; --reader-muted: #6b7867; --reader-line: #cbd5c5; --reader-chrome: #f0f4ec; }
#readerPanel.night { --reader-paper: #202422; --reader-ink: #d6d8ce; --reader-muted: #969f93; --reader-line: #3a433b; --reader-chrome: #272e28; --reader-accent: #b4c9a6; }
#readerPanel button { color: inherit; touch-action: manipulation; }
#readerPanel .secondary-button, #readerPanel .icon-button { border-color: transparent; background: transparent; box-shadow: none; min-height: 44px; border-radius: 10px; }
#readerPanel button:hover { background: color-mix(in srgb, var(--reader-ink) 7%, transparent); }
#readerPanel button:focus-visible, #readerPanel input:focus-visible, #readerPanel select:focus-visible { outline: 2px solid var(--reader-accent); outline-offset: 3px; }
#readerPanel button:disabled { opacity: .35; cursor: default; }
#readerPanel .reader-toolbar { flex: 0 0 auto; min-height: 64px; padding: calc(8px + env(safe-area-inset-top)) 24px 8px; display: flex; flex-wrap: nowrap; gap: 20px; background: var(--reader-chrome); border-color: var(--reader-line); }
#readerPanel .reader-toolbar > strong { min-width: 0; font-size: .95rem; font-weight: 500; letter-spacing: .02em; }
.reader-top-actions { display: flex; gap: 4px; flex-shrink: 0; }
#readerAppearanceButton { font-family: Georgia, serif; font-size: 1.25rem; }
#readerBackButton { flex-shrink: 0; }
#readerPanel .reader-layout { position: absolute; inset: 0; display: flex; min-width: 0; min-height: 0; overflow: hidden; }
#readerPanel .reader-toolbar { position: absolute; z-index: 8; top: 0; right: 0; left: 0; }
#readerPanel .reader-bottom-bar { position: absolute; z-index: 8; right: 0; bottom: 0; left: 0; }
#readerPanel .reader-content { --reader-font-size: 20px; width: min(100%, 820px); flex: 0 1 820px; min-width: 0; height: 100%; margin: 0 auto; padding: 52px clamp(24px, 5vw, 72px) 96px; color: var(--reader-ink); background: transparent; font-family: "Noto Serif SC Local", "Songti SC", SimSun, serif; font-size: calc(var(--reader-font-size) * var(--reading-text-scale)); line-height: var(--reader-line-height, 1.9); overflow: auto; overscroll-behavior: contain; scrollbar-width: thin; scrollbar-color: var(--reader-line) transparent; overflow-wrap: break-word; }
#readerPanel .reader-content h1 { font-size: 1.5em; font-weight: 600; line-height: 1.55; margin: 12px 0 2em; text-align: left; letter-spacing: .03em; }
#readerPanel .reader-content p { margin: 0 0 1em; line-height: inherit; text-align: justify; text-indent: 2em; letter-spacing: .025em; }
#readerPanel .reader-content.reader-pdf-text p { white-space: normal; }
#readerPanel .reader-content { touch-action: pan-y pinch-zoom; padding-top: calc(84px + env(safe-area-inset-top)); padding-bottom: calc(90px + env(safe-area-inset-bottom)); }
#readerPanel.reader-pdf-zoomed .reader-content { touch-action: auto; }
#readerPanel:fullscreen { width: 100vw; height: 100dvh; max-height: none; }
#readerPanel::backdrop { background: var(--reader-paper, #202422); }
#readerPanel .reader-content p.reader-page-source { margin-top: 3em; padding-top: 16px; border-top: 1px solid var(--reader-line); color: var(--reader-muted); font-size: .6em; text-indent: 0; text-align: center; }
#readerPanel[data-reader-font="sans"] .reader-content { font-family: "Microsoft YaHei", "PingFang SC", sans-serif; }
#readerPanel .reader-content .reader-original-link { display: block; margin: -24px 0 24px auto; font-size: .65em; color: var(--reader-muted); }
.reader-bottom-bar { display: flex; align-items: center; justify-content: space-between; gap: 12px; padding: 8px 24px calc(8px + env(safe-area-inset-bottom)); flex: 0 0 auto; min-height: 62px; border-top: 1px solid var(--reader-line); background: var(--reader-chrome); }
.reader-page-navigation { display: flex; align-items: center; justify-content: center; gap: 16px; min-width: 0; }
#readerProgressLabel { font-size: .75rem; color: var(--reader-muted); text-align: center; font-variant-numeric: tabular-nums; min-width: 120px; }
.reader-drawer-scrim { position: absolute; z-index: 9; inset: 0; border: 0; background: #0004 !important; cursor: default; }
.reader-toc-drawer, #readerPanel .reader-chat-panel, .reader-appearance { position: absolute; z-index: 10; top: 0; bottom: 0; width: min(360px, 88vw); min-height: 0; display: flex; flex-direction: column; padding: env(safe-area-inset-top) 0 env(safe-area-inset-bottom); background: var(--reader-chrome); color: var(--reader-ink); box-shadow: 0 8px 40px #0002; border: 0; }
.reader-toc-drawer { left: 0; }
#readerPanel .reader-chat-panel { right: 0; width: min(400px, 94vw); }
.reader-toc-drawer > header, .reader-appearance > header, #readerPanel .reader-chat-panel > header { display: flex; align-items: center; justify-content: space-between; padding: 14px 20px; flex-shrink: 0; border-bottom: 1px solid var(--reader-line); }
.reader-toc-search { display: flex; align-items: center; gap: 8px; margin: 16px; padding: 0 10px; border: 1px solid var(--reader-line); border-radius: 8px; }
.reader-toc-search input { width: 100%; min-width: 0; height: 42px; border: 0; background: transparent; color: inherit; font: inherit; }
#readerPanel .reader-toc { display: block; max-height: none; flex: 1; overflow: auto; padding: 0 12px 20px; background: transparent; border: 0; }
#readerPanel .reader-toc button { display: block; width: 100%; min-width: 0; min-height: 44px; padding: 12px; white-space: normal; line-height: 1.5; color: var(--reader-muted); }
#readerPanel .reader-toc button.active { background: color-mix(in srgb, var(--reader-accent) 12%, transparent); color: var(--reader-accent); }
.reader-appearance { top: auto; right: 20px; bottom: 80px; width: min(380px, calc(100% - 32px)); max-height: calc(100dvh - 110px); overflow: auto; border: 1px solid var(--reader-line); border-radius: 18px; padding: 0 20px 20px; }
.reader-appearance > header { padding: 8px 0; }
.reader-appearance-text { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; padding-top: 20px; }
.reader-appearance-text label { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 10px; font-size: .85rem; }
.reader-appearance-text output { color: var(--reader-muted); font-size: .8em; }
.reader-appearance-text input { width: 100%; accent-color: var(--reader-accent); }
.reader-appearance-text select { width: 100%; min-height: 42px; padding: 8px; border: 1px solid var(--reader-line); border-radius: 8px; color: inherit; background: var(--reader-paper); }
#readerFlowButton { align-self: end; border: 1px solid var(--reader-line) !important; font-size: .85rem; }
.reader-setting-caption { margin: 24px 0 12px; font-size: .8rem; }
.reader-theme-options { display: grid; grid-template-columns: repeat(4, 1fr); gap: 8px; }
#readerPanel [data-reader-theme] { min-height: 50px; border: 2px solid transparent; border-radius: 10px; font-size: .8rem; }
#readerPanel [data-reader-theme="white"] { background: #fff; color: #303430; }
#readerPanel [data-reader-theme="paper"] { background: #f3ead8; color: #4d493b; }
#readerPanel [data-reader-theme="sage"] { background: #dce6d5; color: #354333; }
#readerPanel [data-reader-theme="night"] { background: #202422; color: #d6d8ce; }
#readerPanel [data-reader-theme][aria-pressed="true"] { border-color: var(--reader-accent); }
.reader-reading-actions { display: flex; gap: 8px; border-top: 1px solid var(--reader-line); margin-top: 24px; padding-top: 12px; }
.reader-reading-actions button { flex: 1; font-size: .8rem; }
.reader-setting-hint { margin: 12px 0 0; font-size: .75rem; line-height: 1.7; color: var(--reader-muted); }
#readerPanel .reader-search-panel { position: absolute; z-index: 8; top: calc(64px + env(safe-area-inset-top)); right: 0; left: 0; background: var(--reader-chrome); border-color: var(--reader-line); padding: 12px 24px; }
#readerPanel .reader-search-panel input, #readerPanel .reader-chat-form textarea, #readerPanel .reader-selection-popover, #readerPanel .reader-selection-popover textarea { background: var(--reader-chrome); color: var(--reader-ink); border-color: var(--reader-line); }
#readerPanel .reader-search-results { max-height: min(28dvh, 180px); }
#readerPanel .reader-search-result, #readerPanel .reader-chat-message p { color: var(--reader-ink); background: var(--reader-paper); border-color: var(--reader-line); }
#readerPanel .reader-chat-form { border-color: var(--reader-line); }
#readerPanel .reader-selection-popover { z-index: 15; }
#readerPanel .reader-original-action { width: 100%; margin-top: 14px; border: 1px solid var(--reader-line); font-size: .85rem; }
.reader-directory-tabs { display: flex; gap: 8px; padding: 12px 16px 0; }
.reader-directory-tabs button { flex: 1; min-height: 44px; padding: 8px; border: 0; border-bottom: 2px solid transparent; background: transparent; }
#readerPanel .reader-directory-tabs [aria-selected="true"] { border-bottom-color: var(--reader-accent); color: var(--reader-accent); }
.reader-bookmark-list { flex: 1; min-height: 0; overflow: auto; padding: 16px; }
.reader-bookmark-help, .reader-bookmark-empty { color: var(--reader-muted); font-size: .8rem; line-height: 1.8; }
.reader-bookmark-row { display: flex; align-items: center; gap: 6px; padding: 12px 0; border-bottom: 1px solid var(--reader-line); }
#readerPanel .reader-bookmark-row > .icon-button { flex: 0 0 auto; width: auto; min-width: 60px; min-height: 44px; padding: 8px 12px; white-space: nowrap; word-break: keep-all; overflow-wrap: normal; writing-mode: horizontal-tb; font-size: .8rem; color: var(--reader-muted); }
.reader-bookmark-jump { flex: 1; min-width: 0; border: 0; background: transparent; text-align: left; padding: 8px 4px; }
.reader-bookmark-jump strong, .reader-bookmark-jump small { display: block; overflow-wrap: anywhere; }
.reader-bookmark-jump strong { font-size: .85rem; line-height: 1.6; }
.reader-bookmark-jump small { margin-top: 6px; font-size: .7rem; color: var(--reader-muted); }
#readerPanel #readerBookmarkButton[aria-pressed="true"] { color: var(--reader-accent); }
#readerBookmarkButton[aria-pressed="true"] svg { fill: currentColor; }
#readerPanel.reader-focus .reader-toolbar, #readerPanel.reader-focus .reader-bottom-bar, #readerPanel.reader-focus .reader-search-panel, #readerPanel.reader-focus .pdf-toolbar, #readerPanel.reader-focus .pdf-capability-hint { display: none; }
#readerPanel.reader-focus .reader-content { padding-top: calc(84px + env(safe-area-inset-top)); }
#readerPanel.original-pdf-reader .reader-content, #readerPanel.original-pdf-reader.reader-focus .reader-content { width: 100%; flex-basis: 100%; padding: calc(156px + env(safe-area-inset-top)) 16px calc(80px + env(safe-area-inset-bottom)); background: var(--reader-paper); }
#readerPanel .pdf-toolbar { position: absolute; z-index: 8; top: calc(64px + env(safe-area-inset-top)); right: 0; left: 0; }
#readerPanel .pdf-capability-hint { position: absolute; z-index: 8; top: calc(120px + env(safe-area-inset-top)); right: 0; left: 0; background: var(--reader-chrome); }
#readerPanel.original-pdf-reader #readerTocButton, #readerPanel.original-pdf-reader .reader-appearance-text, #readerPanel.original-pdf-reader .reader-reading-actions, #readerPanel.original-pdf-reader .reader-setting-hint { display: none; }
#readerPanel.original-pdf-reader .reader-bottom-bar { justify-content: center; }
#readerPanel .pdf-toolbar { flex: 0 0 auto; flex-wrap: nowrap; overflow-x: auto; gap: 6px; padding: 6px 20px; border-color: var(--reader-line); background: var(--reader-chrome); }
#readerPanel .pdf-toolbar > * { flex-shrink: 0; }
#readerPanel .pdf-toolbar button { font-size: .8rem; }
#readerPanel .pdf-toolbar input { background: var(--reader-paper); color: var(--reader-ink); border-color: var(--reader-line); }
#readerPanel .pdf-status:not(.error) { position: absolute; width: 1px; height: 1px; overflow: hidden; clip-path: inset(50%); }
#readerPanel .pdf-status.error { position: absolute; z-index: 8; top: calc(156px + env(safe-area-inset-top)); right: 16px; left: 16px; padding: 10px; background: var(--reader-chrome); }
#readerPanel .pdf-capability-hint { margin: 0; padding: 4px 20px 8px; color: var(--reader-muted); font-size: .7rem; line-height: 1.5; }
#readingModalBackdrop .hidden, #readingModalBackdrop [hidden] { display: none !important; }
@media (max-width: 820px) {
    #readerPanel:not(.original-pdf-reader) .reader-content { display: block; column-width: var(--reader-column-width, 300px); column-gap: var(--reader-column-gap, 48px); column-fill: auto; overflow: hidden; padding: calc(76px + env(safe-area-inset-top)) 24px calc(80px + env(safe-area-inset-bottom)); scroll-behavior: auto; }
    #readerPanel.reader-focus:not(.original-pdf-reader) .reader-content { padding-top: calc(76px + env(safe-area-inset-top)); }
    #readerPanel:not(.original-pdf-reader) .reader-content p { orphans: 2; widows: 2; }
    #readerPanel:not(.original-pdf-reader) .reader-content h1 { break-after: avoid; }
    .app-view .mobile-workspace-nav { display: grid !important; background: var(--surface); border-color: var(--line); height: calc(64px + env(safe-area-inset-bottom)); }
    .app-view .mobile-workspace-nav button { font-size: .7rem; gap: 4px; padding: 6px; }
    .app-view .mobile-workspace-nav button svg { width: 24px; height: 24px; }
    .app-view .mobile-workspace-nav button.active { color: var(--primary); background: transparent; }
    .app-view { padding-bottom: calc(64px + env(safe-area-inset-bottom)); }
    .mobile-keyboard-open .app-view .mobile-workspace-nav { display: none !important; }
    .mobile-keyboard-open .app-view { padding-bottom: 0; }
    .app-view:has(#readingModalBackdrop:not(.hidden)) .chat-header { display: none; }
    .app-view:has(#readingModalBackdrop:not(.hidden)):has(#readerPanel:not(.hidden)) .mobile-workspace-nav { display: none !important; }
}
@media (max-width: 600px) {
    #readingModalBackdrop .reading-room-header { min-height: 76px; padding: 16px 20px 12px; }
    #readingModalBackdrop .reading-room-header h2 { font-size: 1.6rem; }
    #readingModalBackdrop .reading-room-subtitle { font-size: .75rem; }
    #readingModalBackdrop .reading-header-actions { gap: 0; }
    #readingModalBackdrop .reading-header-actions .secondary-button { padding: 8px; font-size: .75rem; }
    #readingModalBackdrop .bookshelf-panel { padding: 4px 20px 32px; }
    #readingModalBackdrop .bookshelf-toolbar { grid-template-columns: minmax(0, 1fr); }
    #readingModalBackdrop .reading-search { grid-column: 1 / -1; }
    #readingModalBackdrop .shelf-group-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 22px 16px; }
    #readingModalBackdrop .book-cover { max-height: 200px; padding: 14px 8px; gap: 10px; box-shadow: 1px 3px 6px #0002; }
    #readingModalBackdrop .book-cover > strong { font-size: .8rem; letter-spacing: 0; -webkit-line-clamp: 4; }
    #readingModalBackdrop .book-cover-ornament { font-size: .5rem; padding: 0 0 5px; }
    #readingModalBackdrop .book-card-info { padding-top: 10px; }
    #readingModalBackdrop .book-card-info > strong { font-size: .85rem; }
    #readingModalBackdrop .book-card-info small { margin: 3px 0 0; font-size: .75rem; }
    .reading-continue-card { flex-wrap: wrap; gap: 14px; padding: 18px; }
    .reading-continue-cover { width: 52px; height: 74px; flex-basis: 52px; }
    .reading-continue-copy strong { font-size: 1rem; }
    .reading-continue-card > button { width: 100%; }
    #readerPanel .reader-toolbar { padding: calc(6px + env(safe-area-inset-top)) 10px 6px; min-height: 56px; gap: 6px; }
    #readerPanel .reader-toolbar > strong { text-align: left; font-size: .85rem; }
    #readerBackButton { padding: 8px; }
    #readerBackButton span { display: none; }
    .reader-top-actions { gap: 0; }
    #readerFocusButton { display: inline-flex; }
    #readerPanel .reader-top-actions .icon-button { width: 38px; min-width: 38px; padding: 6px; }
    #readerPanel .reader-content { padding: 28px 24px 32px; }
    #readerPanel .reader-content h1 { font-size: 1.3em; }
    .reader-bottom-bar { padding: 6px 8px calc(6px + env(safe-area-inset-bottom)); gap: 2px; }
    .reader-bottom-bar .secondary-button { padding: 8px; gap: 4px; font-size: .75rem; }
    .reader-bottom-bar svg { width: 18px; height: 18px; }
    .reader-page-navigation { gap: 0; flex: 1; }
    #readerProgressLabel { min-width: 0; flex: 1; font-size: .65rem; }
    .reader-page-navigation .icon-button { width: 36px; min-width: 36px; }
    .reader-appearance { right: 0; bottom: 0; width: 100%; max-height: 82dvh; border-radius: 20px 20px 0 0; padding-bottom: calc(20px + env(safe-area-inset-bottom)); }
    #readerPanel .pdf-toolbar { padding: 4px 8px; }
    #readerPanel .pdf-capability-hint { padding: 4px 12px 8px; }
    #readerPanel .reader-selection-popover { left: 10px !important; right: 10px; top: auto !important; bottom: calc(68px + env(safe-area-inset-bottom)); width: auto; }
}
@media (prefers-reduced-motion: no-preference) {
    .reading-continue-card { animation: reading-arrive .35s ease-out; }
    .reader-appearance:not(.hidden) { animation: reading-arrive .18s ease-out; }
    @keyframes reading-arrive { from { opacity: 0; transform: translateY(8px); } to { opacity: 1; transform: translateY(0); } }
}