/* ── THE BOOK ── */
#tab-book { padding: 10px 0 30px; }

.book-countdown {
  text-align: center;
  font-family: 'Orbitron', sans-serif;
  font-size: 11px;
  letter-spacing: 2px;
  color: var(--neon-green);
  background: rgba(0,255,136,0.08);
  border: 1px solid rgba(0,255,136,0.25);
  border-radius: 3px;
  padding: 10px 16px;
  max-width: 560px;
  margin: 0 auto 30px;
}

.book-layout { display: flex; gap: 36px; align-items: flex-start; }
.book-list-col { flex: 0 0 240px; }
.book-detail-col { flex: 1 1 auto; min-width: 0; }

.book-list-section-label {
  font-family:'Orbitron',sans-serif; font-size:10px; letter-spacing:4px;
  color: var(--neon-cyan); opacity:0.7; margin: 22px 0 8px;
}
.book-list-section-label:first-child { margin-top: 0; }

.book-list { list-style: none; margin: 0 0 4px; padding: 0; }
.book-list-item {
  cursor: pointer;
  font-family:'Orbitron',sans-serif; font-size:11px; letter-spacing:1.5px;
  color: var(--text-dim);
  padding: 9px 12px;
  border: 1px solid transparent; border-left: 2px solid transparent;
  border-radius: 2px;
  transition: all 0.2s ease;
}
.book-list-item:hover { color:#fff; background: rgba(0,245,255,0.06); border-left-color: rgba(0,245,255,0.4); }
.book-list-item.selected {
  color:#00f5ff; background: rgba(0,245,255,0.1);
  border-color: rgba(0,245,255,0.25); border-left-color:#00f5ff;
}
.book-list-item.locked {
  cursor: default;
  color: rgba(232,244,255,0.28);
}
.book-list-item.locked:hover { color: rgba(232,244,255,0.4); background: rgba(255,255,255,0.03); border-left-color: transparent; }
.book-lock-icon { font-size: 10px; opacity: 0.8; }

.book-reader {
  background: var(--panel-bg);
  border: 1px solid var(--panel-border);
  clip-path: polygon(0 0, calc(100% - 18px) 0, 100% 18px, 100% 100%, 18px 100%, 0 calc(100% - 18px));
  padding: 32px 40px 36px;
  min-height: 420px;
  max-height: 68vh;
  overflow-y: auto;
}

.book-reader-header { margin-bottom: 22px; }
.book-reader-part {
  font-family:'Orbitron',sans-serif; font-size:10px; letter-spacing:4px;
  color: var(--neon-cyan); opacity:0.7; margin-bottom: 6px;
}
.book-reader-title {
  font-family:'Orbitron',sans-serif; font-size:24px; font-weight:900; letter-spacing:3px;
  background: linear-gradient(90deg,#cc00ff,#0088ff,#00ffcc);
  -webkit-background-clip:text; -webkit-text-fill-color:transparent;
}

.book-paragraph {
  font-size: 15px; line-height: 1.85; letter-spacing: 0.2px;
  color: var(--text-bright);
  margin-bottom: 16px;
}

.book-scene-break {
  text-align: center;
  color: var(--neon-purple);
  letter-spacing: 10px;
  font-size: 11px;
  margin: 26px 0;
  opacity: 0.7;
}

.book-quote {
  font-family:'Orbitron',sans-serif;
  font-size: 15px; letter-spacing: 1.5px;
  color: var(--neon-cyan);
  text-align: center;
  margin: 24px 0;
  padding: 12px 0;
  border-top: 1px solid rgba(0,245,255,0.2);
  border-bottom: 1px solid rgba(0,245,255,0.2);
}

.book-reader-nav {
  display: flex; justify-content: space-between; gap: 12px;
  margin-top: 30px; padding-top: 20px;
  border-top: 1px solid rgba(255,255,255,0.08);
}
.book-nav-btn {
  font-family:'Orbitron',sans-serif; font-size:10px; letter-spacing:3px;
  padding: 10px 18px;
  background: rgba(0,20,40,0.6);
  border: 1px solid rgba(0,245,255,0.25);
  color: var(--neon-cyan);
  clip-path: polygon(0 0, calc(100% - 10px) 0, 100% 10px, 100% 100%, 10px 100%, 0 calc(100% - 10px));
  cursor: pointer;
  transition: all 0.2s ease;
}
.book-nav-btn:hover:not(:disabled) { background: rgba(0,245,255,0.15); box-shadow: 0 0 14px rgba(0,245,255,0.2); }
.book-nav-btn:disabled { opacity: 0.3; cursor: default; color: var(--text-dim); border-color: rgba(255,255,255,0.1); }

.book-empty {
  color: var(--text-dim);
  font-size: 14px; letter-spacing: 1px;
  text-align: center; padding: 60px 0;
}

.book-locked-panel {
  text-align: center;
  padding: 60px 20px;
}
.book-lock-icon-big { font-size: 42px; margin-bottom: 18px; opacity: 0.7; }
.book-locked-title {
  font-family:'Orbitron',sans-serif; font-size:18px; letter-spacing:2px;
  color: var(--text-bright); margin-bottom: 10px;
}
.book-locked-sub {
  font-size: 13px; letter-spacing: 1px; color: var(--text-dim);
}

@media (max-width: 760px) {
  .book-layout { flex-direction: column; }
  .book-list-col { flex-basis: auto; width: 100%; }
  .book-reader { padding: 24px 20px 28px; max-height: none; }
}