/* ===== CUSTOM BOOK READER — IMMERSIVE FULL PAGE ===== */
body:has(.reader-shell) { padding-top: 0 !important; }
body:has(.reader-shell) #mainNav,
body:has(.reader-shell) .site-footer,
body:has(.reader-shell) .preloader { display: none !important; }
body.reader-mode { padding-top: 0 !important; }
body.reader-mode #mainNav,
body.reader-mode .site-footer,
body.reader-mode .preloader { display: none !important; }

.reader-shell { min-height: 100vh; background: var(--bg-primary); }
.reader-shell[data-file-type="pdf"] .reader-stage { background: #0f0f1a; }

.reader-topbar { position: fixed; top: 0; left: 0; right: 0; z-index: 30; background: linear-gradient(180deg, rgba(10,14,39,0.98), rgba(6,8,24,0.98)); border-bottom: 1px solid var(--glass-border); backdrop-filter: blur(12px); box-shadow: 0 4px 20px rgba(0,0,0,0.25); }
.reader-topbar-inner { display: flex; align-items: center; gap: 16px; padding: 12px 0; }
.reader-back { color: var(--text-secondary); text-decoration: none; font-size: 0.88rem; display: inline-flex; align-items: center; gap: 6px; }
.reader-back:hover { color: var(--gold); }
.reader-book-meta { display: flex; align-items: center; gap: 12px; flex: 1; min-width: 0; }
.reader-mini-cover { width: 36px; height: 48px; object-fit: cover; border-radius: 6px; border: 1px solid var(--glass-border); }
.reader-title { font-family: var(--font-display); font-weight: 700; font-size: 0.95rem; color: #fff; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.reader-author { font-size: 0.78rem; color: var(--text-muted); }
.reader-top-actions { display: flex; gap: 8px; }
.reader-progress { height: 2px; background: rgba(255,255,255,0.06); }
.reader-progress div { height: 100%; width: 0%; background: var(--gold-primary); transition: width 0.3s ease; }

.reader-toolbar-wrap { position: fixed; top: 75px; left: 0; right: 0; z-index: 29; background: rgba(6,8,24,0.96); border-bottom: 1px solid var(--glass-border); backdrop-filter: blur(12px); box-shadow: 0 4px 20px rgba(0,0,0,0.2); }
.reader-toolbar { display: flex; align-items: center; justify-content: space-between; gap: 12px; padding: 10px 0; flex-wrap: wrap; }
.reader-toolbar-left, .reader-toolbar-center, .reader-toolbar-right { display: flex; align-items: center; gap: 8px; }
.reader-toolbar-label { font-family: var(--font-grotesk); font-size: 0.8rem; font-weight: 700; letter-spacing: 0.08em; text-transform: uppercase; color: var(--gold); display: inline-flex; align-items: center; gap: 6px; }
.reader-file-badge { font-size: 0.65rem; font-weight: 800; letter-spacing: 0.06em; background: rgba(255,255,255,0.08); border: 1px solid var(--glass-border); padding: 2px 6px; border-radius: 6px; color: var(--text-secondary); }
.reader-btn { display: inline-flex; align-items: center; justify-content: center; min-width: 34px; height: 34px; padding: 0 8px; background: var(--glass-bg); border: 1px solid var(--glass-border); border-radius: 8px; color: var(--text-secondary); cursor: pointer; transition: all 0.2s ease; font-size: 0.85rem; }
.reader-btn:hover { background: rgba(240,184,51,0.12); border-color: rgba(240,184,51,0.2); color: var(--gold); }
.reader-btn.active { background: var(--gold); border-color: var(--gold); color: #1a1206; }
.reader-pageinfo { font-family: var(--font-grotesk); font-size: 0.85rem; color: var(--text-secondary); min-width: 70px; text-align: center; }
.reader-sep { width: 1px; height: 20px; background: var(--glass-border); margin: 0 4px; }
.reader-theme-group { display: flex; gap: 4px; }

.reader-layout { display: flex; gap: 20px; padding: 140px 0 40px; align-items: flex-start; }
.reader-layout:has(.reader-sidebar[style*="display: none"]) { gap: 0; }
.reader-main { flex: 1; min-width: 0; display: flex; flex-direction: column; width: 100%; }
@media (max-width: 900px) { .reader-layout { flex-direction: column; } .reader-sidebar { display: none !important; } }
.reader-sidebar { width: 240px; flex-shrink: 0; position: sticky; top: 125px; align-self: start; background: linear-gradient(145deg, rgba(255,255,255,0.03), rgba(255,255,255,0.01)); border: 1px solid var(--glass-border); border-radius: 16px; padding: 16px; max-height: calc(100vh - 145px); overflow: auto; }
.reader-sidebar-title { font-family: var(--font-display); font-size: 0.95rem; font-weight: 700; color: #fff; margin-bottom: 12px; }
.reader-toc { display: flex; flex-direction: column; gap: 6px; margin-bottom: 16px; }
.toc-link { color: var(--text-secondary); text-decoration: none; font-size: 0.85rem; padding: 6px 8px; border-radius: 8px; border: 1px solid transparent; }
.toc-link:hover { background: rgba(240,184,51,0.08); color: var(--gold); border-color: rgba(240,184,51,0.12); }
.reader-thumbs { display: flex; flex-direction: column; gap: 6px; }
.thumb-btn { text-align: left; background: var(--glass-bg); border: 1px solid var(--glass-border); border-radius: 8px; padding: 8px 10px; color: var(--text-secondary); font-size: 0.8rem; cursor: pointer; }
.thumb-btn:hover { border-color: rgba(240,184,51,0.2); color: var(--gold); }

.reader-stage { position: relative; background: #0a0e27; border: 1px solid var(--glass-border); border-radius: 16px; overflow: hidden; min-height: 70vh; display: flex; flex-direction: column; width: 100%; overflow-x: hidden; }
.reader-stage[data-theme="light"] { background: #fdf6e3; }
.reader-stage[data-theme="sepia"] { background: #f4ecd8; }
.reader-stage[data-theme="dark"] { background: #0a0e27; }

.pdf-viewer { display: block; padding: 16px; overflow-y: auto; overflow-x: hidden; background: inherit; flex: 1; width: 100%; height: calc(100vh - 160px); max-height: calc(100vh - 160px); min-height: 60vh; text-align: center; }
.pdf-viewer canvas { box-shadow: 0 10px 40px rgba(0,0,0,0.4); border-radius: 6px; background: white; display: block; margin: 0 auto; width: 100% !important; max-width: 850px !important; height: auto !important; }
.epub-viewer { width: 100%; flex: 1; height: calc(100vh - 160px); max-height: calc(100vh - 160px); min-height: 65vh; background: #fff; color: #111; overflow: hidden; }
.epub-viewer iframe { width: 100% !important; height: 100% !important; }
.docx-viewer { flex: 1; width: 100%; height: calc(100vh - 160px); max-height: calc(100vh - 160px); padding: 32px 28px; overflow-y: auto; overflow-x: hidden; background: #fff; color: #1a1a1a; line-height: 1.8; word-wrap: break-word; overflow-wrap: break-word; }
.docx-viewer * { max-width: 100% !important; overflow-wrap: break-word; }
.docx-viewer h1, .docx-viewer h2, .docx-viewer h3 { color: #1a1a1a; margin: 1.2em 0 0.5em; line-height: 1.3; }
.docx-viewer p { margin: 0 0 1em; }
.docx-viewer img { max-width: 100%; height: auto; border-radius: 6px; }
.reader-stage[data-theme="dark"] .docx-viewer { background: #f9f9f9; }
.reader-stage[data-theme="sepia"] .docx-viewer { background: #fdf6e3; }
.txt-viewer { padding: 24px; overflow: auto; flex: 1; width: 100%; min-height: 50vh; }
.txt-viewer pre { white-space: pre-wrap; word-wrap: break-word; font-family: var(--font-sans); font-size: 0.95rem; line-height: 1.8; color: var(--text-primary); margin: 0; }
.reader-stage[data-theme="light"] .txt-viewer pre { color: #2c2c2c; }
.reader-stage[data-theme="sepia"] .txt-viewer pre { color: #5b4636; }

@media (max-width: 768px) {
  .reader-toolbar { gap: 8px; padding: 8px 0; }
  .reader-toolbar-center { flex-wrap: wrap; justify-content: center; }
  .reader-stage { min-height: 60vh; border-radius: 12px; }
  .pdf-viewer { padding: 8px; }
  .docx-viewer { padding: 18px 16px; font-size: 0.92rem; }
  .epub-viewer { min-height: 60vh; }
}

.fallback-viewer { display: flex; align-items: center; justify-content: center; padding: 40px; }
.fallback-card { text-align: center; max-width: 420px; background: var(--glass-bg); border: 1px solid var(--glass-border); border-radius: 16px; padding: 28px; }
.fallback-card i { font-size: 2rem; color: var(--gold); margin-bottom: 12px; display: block; }
.fallback-card h3 { color: #fff; margin-bottom: 8px; }
.fallback-card p { color: var(--text-secondary); font-size: 0.9rem; margin-bottom: 16px; }
.btn-reader-primary { display: inline-flex; align-items: center; gap: 8px; background: linear-gradient(135deg, var(--gold), #d4a032); color: #060818; padding: 10px 18px; border-radius: 10px; font-weight: 700; text-decoration: none; margin: 4px; }
.btn-reader-ghost { display: inline-flex; align-items: center; gap: 8px; background: var(--glass-bg); border: 1px solid var(--glass-border); color: var(--text-secondary); padding: 10px 18px; border-radius: 10px; text-decoration: none; margin: 4px; }
.btn-reader-ghost:hover { border-color: rgba(240,184,51,0.2); color: var(--gold); }

.reader-loader { position: absolute; inset: 0; display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 12px; background: rgba(6,8,24,0.85); color: var(--text-secondary); font-size: 0.9rem; z-index: 5; }
.reader-loader .spinner { width: 36px; height: 36px; border: 3px solid var(--glass-border); border-top-color: var(--gold); border-radius: 50%; animation: readerSpin 0.8s linear infinite; }
@keyframes readerSpin { to { transform: rotate(360deg); } }