/* ── PDF Book Viewer – Frontend Styles v2.4.3 ─────────── */

/* ══ Outer wrapper ═══════════════════════════════════════ */
.pbv-viewer-wrap {
    border: 1px solid #ddd;
    border-radius: 8px;
    font-family: inherit;
    background: #fff;
    margin: 20px 0;
    /* Prevent the viewer from being wider than the page on mobile */
    max-width: 100%;
    box-sizing: border-box;
    -webkit-overflow-scrolling: touch;

    /* Respond to the WIDGET's own width, not the browser window.
       Fixes the PDF column getting squeezed to a sliver when this
       shortcode sits inside a narrow theme column/sidebar layout,
       since the old @media breakpoints only ever looked at the
       viewport and could stay "desktop" even when there was no
       room left for the 200px + 380px fixed columns. */
    container-type: inline-size;
    container-name: pbv-viewer;
}

/* ══ Three-column inner layout ════════════════════════════
   [Sidebar | PDF canvas | Notes panel]
════════════════════════════════════════════════════════════ */
.pbv-viewer-inner {
    display: grid;
    grid-template-columns: 200px 1fr 380px;
    min-height: 600px;
    align-items: stretch;
}

/* ── LEFT: Page-list sidebar ─────────────────────────── */
.pbv-front-sidebar {
    flex-shrink: 0;
    border-right: 1px solid #e0e0e0;
    display: flex;
    flex-direction: column;
    background: #f8f9fa;
    overflow: hidden;
    border-top-left-radius: 7px;
    border-bottom-left-radius: 7px;
}

.pbv-front-sidebar-header {
    padding: 10px 12px;
    background: #2c3e50;
    color: #fff;
    font-size: 12px;
    word-break: break-word;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 6px;
    flex-shrink: 0;
}

.pbv-edit-badge {
    background: #46a046;
    color: #fff;
    border-radius: 3px;
    padding: 2px 6px;
    font-size: 9px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.04em;
    flex-shrink: 0;
}

.pbv-front-pages {
    margin: 0;
    padding: 0;
    list-style: none;
    overflow-y: auto;
    flex: 1;
}

.pbv-front-page-item {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 8px 10px;
    cursor: pointer;
    border-bottom: 1px solid #ebebeb;
    transition: background 0.15s;
    font-size: 11px;
}

.pbv-front-page-item:hover  { background: #eaf4ff; }
.pbv-front-page-item.pbv-active { background: #0073aa; color: #fff; }
.pbv-front-page-item.pbv-active .pbv-front-page-num,
.pbv-front-page-item.pbv-active .pbv-front-page-lbl { color: #fff; }

.pbv-front-page-num {
    width: 24px;
    height: 24px;
    border-radius: 50%;
    background: #dce0e3;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 10px;
    font-weight: 700;
    flex-shrink: 0;
    color: #444;
}
.pbv-front-page-item.pbv-active .pbv-front-page-num { background: rgba(255,255,255,0.25); }

.pbv-front-page-lbl {
    flex: 1;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    color: #555;
}

/* ── CENTRE: PDF canvas column ───────────────────────── */
.pbv-front-pdf-col {
    background: #525659;
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 14px;
    min-width: 0;
    border-right: 1px solid #333;
    overflow: hidden;
    /* Stable width so JS measurement doesn't oscillate between renders */
    contain: layout size;
}

/* ── Navigation controls ────────────────────────────── */
.pbv-front-controls {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 12px;
    background: rgba(0,0,0,0.3);
    padding: 6px 14px;
    border-radius: 20px;
    flex-shrink: 0;
}

.pbv-btn {
    background: #fff;
    border: none;
    border-radius: 4px;
    padding: 5px 11px;
    cursor: pointer;
    font-size: 13px;
    font-weight: 700;
    transition: background 0.15s;
    white-space: nowrap;
}
.pbv-btn:hover    { background: #e0e0e0; }
.pbv-btn:disabled { opacity: 0.4; cursor: default; }

.pbv-page-info {
    color: #fff;
    font-size: 13px;
    min-width: 60px;
    text-align: center;
}

/* ── Canvas ─────────────────────────────────────────── */
.pbv-front-canvas {
    /* width/height are set by JS via style attribute (DPR-aware) */
    max-width: 100%;
    border-radius: 3px;
    box-shadow: 0 2px 12px rgba(0,0,0,0.5);
    display: block;
    touch-action: pan-y;        /* allow vertical scroll, block pinch-zoom on canvas */
    -webkit-tap-highlight-color: transparent;
}

/* ── Admin read-only note below canvas (admin only) ─── */
.pbv-front-admin-note-display {
    background: #fff;
    border-radius: 6px;
    padding: 12px 16px;
    margin-top: 14px;
    width: 100%;
    box-sizing: border-box;
}
.pbv-front-note-label {
    font-size: 10px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: #888;
    margin-bottom: 5px;
}
.pbv-front-note-body { line-height: 1.65; font-size: 13px; }

/* ── RIGHT: Notes column ─────────────────────────────── */
.pbv-front-notes-col {
    display: flex;
    flex-direction: column;
    background: #f4f5f7;
    border-top-right-radius: 7px;
    border-bottom-right-radius: 7px;
}

/* ── Shared notes panel container ────────────────────── */
/* This is the sticky card: it clings to the top of the viewport
   while .pbv-front-notes-col (and its taller siblings) scroll past. */
.pbv-notes-panel {
    display: flex;
    flex-direction: column;
    background: #fff;
    border-radius: 7px;
    overflow: hidden;
    box-shadow: 0 1px 4px rgba(0,0,0,0.06);

    position: sticky;
    top: 20px;
    max-height: calc(100vh - 40px);  /* 20px breathing room top + bottom */
}

/* Account for the WP admin toolbar so "top" doesn't hide under it */
body.admin-bar .pbv-notes-panel {
    top: calc(32px + 20px);
    max-height: calc(100vh - 32px - 40px);
}
@media screen and (max-width: 782px) {
    body.admin-bar .pbv-notes-panel {
        top: calc(46px + 20px);      /* mobile admin bar is taller */
        max-height: calc(100vh - 46px - 40px);
    }
}

/* ── Panel header ────────────────────────────────────── */
.pbv-notes-panel-header {
    padding: 10px 16px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 8px;
    flex-shrink: 0;
    border-bottom: 1px solid #e8e8e8;
}
.pbv-notes-panel-header--admin   { background: #1e3a5f; color: #fff; }
.pbv-notes-panel-header--student { background: #1a5c2e; color: #fff; }
.pbv-notes-panel-header--guest   { background: #4a4a4a; color: #fff; }

.pbv-notes-panel-title {
    font-size: 12px;
    font-weight: 600;
    color: inherit;
}
.pbv-notes-panel-title strong { font-size: 12px; }

/* Admin-only badge */
.pbv-admin-badge {
    background: rgba(255,255,255,0.2);
    color: #fff;
    border-radius: 3px;
    padding: 2px 8px;
    font-size: 9px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.04em;
    flex-shrink: 0;
}

/* Student "private to you" badge */
.pbv-front-user-badge {
    background: rgba(255,255,255,0.2);
    color: #fff;
    border-radius: 3px;
    padding: 2px 8px;
    font-size: 9px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.04em;
    flex-shrink: 0;
}

/* ── Panel scrollable body ───────────────────────────── */
.pbv-notes-panel-body {
    flex: 1;
    padding: 14px 16px;
    overflow-y: auto;
    display: flex;
    flex-direction: column;
    gap: 0;
}

/* ── Admin note shown inside student panel (read-only) ─ */
.pbv-student-admin-note {
    background: #fffbea;
    border-left: 3px solid #f0c040;
    border-radius: 0 4px 4px 0;
    padding: 10px 14px;
    margin-bottom: 14px;
    font-size: 13px;
}
.pbv-student-admin-note .pbv-front-note-label {
    font-size: 10px;
    color: #8a6a00;
    text-transform: uppercase;
    font-weight: 700;
    letter-spacing: 0.04em;
    margin-bottom: 5px;
}

/* ── Form rows ───────────────────────────────────────── */
.pbv-front-editor-row { margin-bottom: 12px; }
.pbv-front-editor-row:last-child { margin-bottom: 0; }

.pbv-front-editor-lbl {
    display: block;
    font-size: 11px;
    font-weight: 600;
    color: #555;
    margin-bottom: 3px;
}

.pbv-front-label-input,
.pbv-front-note-input,
.pbv-front-user-note-input {
    width: 100%;
    box-sizing: border-box;
    border: 1px solid #d0d0d0;
    border-radius: 4px;
    padding: 8px 10px;
    font-size: 13px;
    background: #fff;
    color: #222;
    font-family: inherit;
}
.pbv-front-note-input,
.pbv-front-user-note-input { resize: vertical; }

/* textarea for student notes — taller to feel like answer space */
.pbv-front-user-note-input { min-height: 220px; }

.pbv-front-editor-fontrow {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    align-items: flex-end;
}
.pbv-front-editor-fontrow > div  { display: flex; flex-direction: column; }
.pbv-front-font-family,
.pbv-front-user-font-family      { padding: 4px 6px; font-size: 11px; }
.pbv-front-font-size,
.pbv-front-user-font-size        { width: 60px; padding: 4px 6px; font-size: 11px; }
.pbv-front-font-color,
.pbv-front-user-font-color       { width: 40px; height: 30px; padding: 0; border: 1px solid #ccc; border-radius: 4px; cursor: pointer; }

/* Live preview */
.pbv-front-note-preview,
.pbv-front-user-note-preview {
    border: 1px dashed #ccc;
    border-radius: 4px;
    padding: 8px 10px;
    min-height: 44px;
    background: #fafafa;
    line-height: 1.55;
    word-wrap: break-word;
    font-size: 13px;
}
.pbv-preview-empty { color: #aaa; font-style: italic; font-size: 11px; }

/* ── Action row (save + print) ───────────────────────── */
.pbv-front-editor-actions {
    display: flex;
    align-items: center;
    gap: 8px;
    flex-wrap: wrap;
}

.pbv-front-save {
    background: #1e3a5f;
    color: #fff;
    border: 0;
    border-radius: 4px;
    padding: 7px 14px;
    font-size: 12px;
    font-weight: 700;
    cursor: pointer;
}
.pbv-front-save:hover    { background: #163055; }
.pbv-front-save:disabled { opacity: 0.6; cursor: default; }
.pbv-front-save-status   { font-size: 11px; min-height: 1em; }

.pbv-front-user-save {
    background: #1a5c2e;
    color: #fff;
    border: 0;
    border-radius: 4px;
    padding: 7px 14px;
    font-size: 12px;
    font-weight: 700;
    cursor: pointer;
}
.pbv-front-user-save:hover    { background: #134821; }
.pbv-front-user-save:disabled { opacity: 0.6; cursor: default; }
.pbv-front-user-save-status   { font-size: 11px; min-height: 1em; }

/* Print Notes button */
.pbv-print-notes-btn {
    background: #fff;
    color: #333;
    border: 1px solid #bbb;
    border-radius: 4px;
    padding: 6px 12px;
    font-size: 12px;
    font-weight: 600;
    cursor: pointer;
    transition: background 0.15s, border-color 0.15s;
}
.pbv-print-notes-btn:hover { background: #f0f0f0; border-color: #888; }

.pbv-print-status {
    font-size: 11px;
    padding: 4px 0 0;
    min-height: 1.2em;
    color: #555;
}

/* ── Login CTA / disabled note panel ─────────────────── */
.pbv-front-login-cta-panel .pbv-notes-panel-body {
    justify-content: center;
    align-items: center;
    text-align: center;
}
.pbv-front-login-cta {
    color: #555;
    font-size: 13px;
    line-height: 1.6;
    padding: 20px;
}
.pbv-front-login-cta a { color: #0073aa; font-weight: 600; text-decoration: none; }
.pbv-front-login-cta a:hover { text-decoration: underline; }
.pbv-front-user-disabled { color: #666; font-size: 13px; padding: 20px; text-align: center; }

/* ── Inline rename (sidebar) ─────────────────────────── */
.pbv-front-rename-btn {
    background: transparent;
    border: 0;
    color: #888;
    cursor: pointer;
    font-size: 12px;
    line-height: 1;
    padding: 2px 4px;
    border-radius: 3px;
    opacity: 0;
    transition: opacity 0.15s, background 0.15s;
    flex-shrink: 0;
}
.pbv-front-page-item:hover .pbv-front-rename-btn { opacity: 1; }
.pbv-front-page-item.pbv-active .pbv-front-rename-btn { color: #fff; opacity: 0.8; }
.pbv-front-rename-btn:hover { background: rgba(0,0,0,0.08); color: #0073aa; }

.pbv-front-rename-input {
    flex: 1;
    min-width: 0;
    border: 1px solid #0073aa;
    border-radius: 3px;
    padding: 2px 5px;
    font-size: 11px;
    background: #fff;
    color: #222;
}
.pbv-front-rename-ok,
.pbv-front-rename-no {
    border: 0;
    background: transparent;
    cursor: pointer;
    font-size: 12px;
    padding: 2px 4px;
    line-height: 1;
    border-radius: 3px;
    color: #fff;
}
.pbv-front-rename-ok { background: #46a046; }
.pbv-front-rename-no { background: #b32d2e; margin-left: 2px; }

/* ── Sidebar "you have a note" dot ───────────────────── */
.pbv-front-page-mynote {
    color: #46a046;
    font-size: 9px;
    line-height: 1;
    margin-left: 1px;
    flex-shrink: 0;
}
.pbv-front-page-item.pbv-active .pbv-front-page-mynote { color: #d4ff9c; }

/* ══ Responsive ═══════════════════════════════════════════ */

/* Tablet: collapse to sidebar + stacked layout
   (container query: reacts to the widget's own width, not the browser window) */
@container pbv-viewer (max-width: 900px) {
    .pbv-viewer-inner {
        grid-template-columns: 180px 1fr;
        grid-template-rows: auto auto;
    }
    .pbv-front-pdf-col   { grid-column: 2; grid-row: 1; }
    .pbv-front-notes-col {
        grid-column: 1 / -1; grid-row: 2; border-top: 2px solid #0073aa;
        border-radius: 0;
    }
    .pbv-front-sidebar   { grid-column: 1; grid-row: 1; }
    .pbv-front-notes-col,
    .pbv-front-sidebar { border-top-left-radius: 0; border-top-right-radius: 0; border-bottom-left-radius: 0; border-bottom-right-radius: 0; }
    /* Stacked layout: notes sit below the PDF, sticky no longer applies */
    .pbv-notes-panel {
        position: static;
        max-height: none;
        box-shadow: none;
        border-radius: 0;
    }
}

/* Mobile: fully stacked
   (container query: reacts to the widget's own width, not the browser window) */
@container pbv-viewer (max-width: 600px) {
    .pbv-viewer-inner {
        grid-template-columns: 1fr;
        grid-template-rows: auto auto auto;
        min-height: unset;
    }
    .pbv-front-sidebar {
        grid-column: 1; grid-row: 1;
        max-height: 130px;
        border-right: none;
        border-bottom: 1px solid #e0e0e0;
        width: 100%;
    }
    .pbv-front-pages { max-height: 100px; }

    .pbv-front-pdf-col {
        grid-column: 1; grid-row: 2;
        padding: 10px 8px;
        contain: unset;     /* allow natural height on mobile */
    }

    .pbv-front-notes-col {
        grid-column: 1; grid-row: 3;
    }

    .pbv-front-rename-btn { opacity: 1; }
    .pbv-front-editor-fontrow { gap: 8px; }
    .pbv-front-user-note-input { min-height: 120px; }

    /* Bigger tap targets for nav buttons on mobile */
    .pbv-btn { padding: 8px 16px; font-size: 15px; }
    .pbv-front-controls { padding: 8px 14px; gap: 14px; }
    .pbv-page-info { font-size: 14px; min-width: 70px; }

    /* Notes panel — no fixed height on mobile */
    .pbv-notes-panel { height: auto; }
    .pbv-notes-panel-body { overflow-y: visible; }
}

/* ══ [pbv_my_notes] shortcode ════════════════════════════ */
.pbv-mynotes-wrap { max-width: 900px; margin: 24px auto; font-family: inherit; }
.pbv-mynotes-heading { font-size: 24px; margin: 0 0 18px; padding-bottom: 10px; border-bottom: 2px solid #e0e0e0; }
.pbv-mynotes-book { margin-bottom: 28px; }
.pbv-mynotes-book-title { font-size: 18px; margin: 0 0 10px; color: #2c3e50; }
.pbv-mynotes-count { color: #888; font-weight: normal; font-size: 14px; }
.pbv-mynotes-list { list-style: none; padding: 0; margin: 0; }
.pbv-mynotes-item {
    background: #fff;
    border: 1px solid #e0e0e0;
    border-left: 3px solid #1a5c2e;
    border-radius: 4px;
    padding: 12px 16px;
    margin-bottom: 10px;
}
.pbv-mynotes-meta { display: flex; align-items: baseline; gap: 10px; margin-bottom: 6px; font-size: 13px; color: #666; }
.pbv-mynotes-page { color: #2c3e50; font-size: 14px; }
.pbv-mynotes-pagenum { color: #888; }
.pbv-mynotes-date { margin-left: auto; font-size: 11px; color: #999; }
.pbv-mynotes-body { line-height: 1.6; word-wrap: break-word; }
.pbv-mynotes-empty,
.pbv-mynotes-cta { text-align: center; color: #666; padding: 20px; }

/* ══ [pdf_book_list] shortcode ═══════════════════════════ */
.pbv-booklist { margin: 20px 0; font-family: inherit; }
.pbv-booklist-heading { font-size: 20px; margin: 0 0 16px; padding-bottom: 8px; border-bottom: 2px solid #e0e0e0; color: #2c3e50; }

.pbv-tag {
    display: inline-block;
    border-radius: 3px;
    padding: 2px 7px;
    font-size: 11px;
    font-weight: 700;
    letter-spacing: 0.03em;
    text-transform: uppercase;
    line-height: 1.5;
}
.pbv-tag-subject { background: #e8f4fc; color: #1a6fa0; }
.pbv-tag-year    { background: #f0f4e8; color: #4a6a1a; }
.pbv-tag-empty   { color: #aaa; }

.pbv-booklist-grid {
    display: grid;
    gap: 16px;
    grid-template-columns: 1fr 1fr;
}
.pbv-booklist-cols-1 .pbv-booklist-grid { grid-template-columns: 1fr; }
.pbv-booklist-cols-2 .pbv-booklist-grid { grid-template-columns: repeat(2,1fr); }
.pbv-booklist-cols-3 .pbv-booklist-grid { grid-template-columns: repeat(3,1fr); }
.pbv-booklist-cols-4 .pbv-booklist-grid { grid-template-columns: repeat(4,1fr); }

.pbv-booklist-card { background: #fff; border: 1px solid #e0e0e0; border-radius: 8px; display: flex; flex-direction: column; overflow: hidden; transition: box-shadow 0.18s, transform 0.18s; }
.pbv-booklist-card:hover { box-shadow: 0 4px 16px rgba(0,0,0,.12); transform: translateY(-2px); }
.pbv-booklist-card-body { padding: 16px 18px; flex: 1; }
.pbv-booklist-card-tags { display: flex; flex-wrap: wrap; gap: 5px; margin-bottom: 8px; min-height: 18px; }
.pbv-booklist-card-title { font-size: 15px; margin: 0 0 6px; line-height: 1.4; color: #1a1a2e; }
.pbv-booklist-card-title a { color: #1a6fa0; text-decoration: none; }
.pbv-booklist-card-title a:hover { text-decoration: underline; }
.pbv-booklist-pages { margin: 0; font-size: 12px; color: #888; }
.pbv-booklist-card-footer { border-top: 1px solid #f0f0f0; padding: 10px 18px; background: #fafafa; }
.pbv-booklist-read-btn { display: inline-block; background: #1a6fa0; color: #fff !important; text-decoration: none !important; border-radius: 4px; padding: 6px 14px; font-size: 13px; font-weight: 600; transition: background 0.15s; }
.pbv-booklist-read-btn:hover { background: #145880; }

.pbv-booklist-ul { list-style: none; padding: 0; margin: 0; }
.pbv-booklist-item-li { padding: 10px 14px; border-bottom: 1px solid #ebebeb; display: flex; align-items: center; gap: 8px; flex-wrap: wrap; font-size: 14px; }
.pbv-booklist-item-li:last-child { border-bottom: none; }
.pbv-booklist-item-li a { color: #1a6fa0; text-decoration: none; }
.pbv-booklist-item-li a:hover { text-decoration: underline; }
.pbv-booklist-empty { color: #777; font-style: italic; padding: 10px 0; }

@media (max-width: 700px) {
    .pbv-booklist-cols-3 .pbv-booklist-grid,
    .pbv-booklist-cols-4 .pbv-booklist-grid { grid-template-columns: repeat(2,1fr); }
}
@media (max-width: 480px) {
    .pbv-booklist-grid { grid-template-columns: 1fr !important; }
}