html, body {
  width: 100vw;
  height: 100vh;
  margin: 0;
  padding: 0;
  overflow: hidden;
  background: #181818;
}

body {
  font-family: 'Segoe UI', Arial, sans-serif;
}

.book-container {
  width: 100vw;
  height: 100vh;
  position: relative;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
}

img {
  position: absolute;
  top: 0; left: 0; right: 0; bottom: 0;
  width: 100vw;
  height: 100vh;
  object-fit: contain;
  background: #111;
  z-index: 1;
  user-select: none;
  margin: 0;
  padding: 0;
  border: none;
}

#title {
  position: absolute;
  top: 2vw;
  left: 50%;
  transform: translateX(-50%);
  color: #fff;
  font-size: 2vw;
  background: none;
  font-weight: 700;
  z-index: 3;
  letter-spacing: 0.05em;
  text-shadow: 0 2px 10px rgba(0,0,0,0.18);
  margin: 0;
  padding: 0;
  border: none;
}

#page-indicator {
  position: absolute;
  top: 5vw;
  left: 50%;
  transform: translateX(-50%);
  font-size: 1vw;
  color: #fff;
  padding: 0;
  background: none !important;
  border: none;
  border-radius: 0;
  z-index: 3;
  min-width: 38px;
  text-align: center;
  font-weight: 500;
  letter-spacing: 0.02em;
  box-shadow: none;
  user-select: none;
}

.navigation {
  position: absolute;
  bottom: 3vw;
  left: 50%;
  transform: translateX(-50%);
  z-index: 2;
  display: flex;
  gap: 1vw;
  background: none;
  box-shadow: none;
  border: none;
  padding: 0;
}

.navigation button {
  font-size: 1vw;
  padding: 0.4vw 1vw;
  border: none;
  border-radius: 0.5vw;
  background: #2061c6;
  color: #fff;
  cursor: pointer;
  font-weight: 600;
  box-shadow: 0 1px 4px rgba(0,0,0,0.08);
  transition: background 0.2s, color 0.2s;
  min-width: 64px;
  margin: 0 0.2vw;
  outline: none;
}

.navigation button:hover,
.navigation button:focus {
  background: #143a6e;
  color: #fff;
}

/* Mobile Anpassung */
@media (max-width: 900px) {
  #title {
    font-size: 4.2vw;
    top: 4vw;
  }
  #page-indicator {
    font-size: 2.6vw;
    top: 9vw;
  }
  .navigation {
    bottom: 5vw;
  }
  .navigation button {
    font-size: 2.5vw;
    padding: 1vw 4vw;
    min-width: 80px;
    border-radius: 1.3vw;
  }
}