body {
  margin: 0;
  min-height: 100vh;
  display: flex;
  justify-content: center;
  align-items: center;
  background: radial-gradient(#d1d1d1, #f0bcbc);
}

#book-wrapper {
  
  display: flex;
  justify-content: center;
  align-items: center;
  overflow: hidden;
}

#book {
  perspective: 800px;
  box-shadow: 0 25px 60px rgba(0,0,0,0.7);
}

#countdown {
  position: absolute;
  top: 30px;
  z-index: 10;
  color: #ffffff;
  font-size: 1.2rem;
  font-weight: 800;
  text-shadow: 0 2px 6px rgba(0,0,0,0.6);
  letter-spacing: 0.1em;
  background: rgba(46, 42, 39, 0.4);
  padding: 0.6rem 1.2rem;
  border-radius: 999px;
  backdrop-filter: blur(6px);
  pointer-events: none; /* IMPORTANT: doesn't block page flips */
}

@media (max-width: 768px) {
  #countdown {
    top: 16px;
    font-size: 2rem;
  }
}