.app {
  max-width: 1200px;
  margin: 0 auto;
}

.toolbar {
  background: #fff;
  padding: 14px;
  border-radius: 14px;
  box-shadow: 0 8px 24px rgba(15, 23, 42, 0.08);
  margin-bottom: 16px;
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  align-items: center;
}

button, label.file-btn {
  border: 0;
  border-radius: 8px;
  padding: 9px 12px;
  background: #2563eb;
  color: #fff;
  font-weight: 700;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  font-size: 14px;
}

button.secondary {
  background: #4b5563;
}

button.dark {
  background: #111827;
}

input[type="file"] {
  display: none;
}

.status {
  margin-left: auto;
  color: #4b5563;
  font-size: 14px;
}

.book-wrap {
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 720px;
  background: radial-gradient(circle at top, #f8fafc 0, #e5e7eb 60%, #cbd5e1 100%);
  border-radius: 18px;
  padding: 24px;
  overflow: auto;
}

.book-wrap:fullscreen {
  border-radius: 0;
  background: #050505;
  min-height: 100vh;
  padding: 0;
}

.book-wrap:fullscreen #book {
  margin: auto;
}

.note {
  font-size: 14px;
  color: #6b7280;
  line-height: 1.5;
  margin-top: 12px;
}

kbd, code {
  background: #eef2ff;
  padding: 2px 6px;
  border-radius: 6px;
}

@media (max-width: 768px) {
  body {
    padding: 10px;
  }

  .book-wrap {
    min-height: 520px;
    padding: 10px;
  }

  .status {
    width: 100%;
    margin-left: 0;
  }
}