body {
  font-family: Arial, sans-serif;
  background: #f3f4f6;
  display: flex;
  justify-content: center;
  padding: 40px;
}

.container {
  width: 550px;
  background: white;
  padding: 25px;
  border-radius: 10px;
  box-shadow: 0 5px 15px rgba(0,0,0,0.1);
}

h1 {
  text-align: center;
  margin-bottom: 20px;
}

input {
  padding: 10px;
  margin: 5px 0;
  width: 100%;
  border-radius: 6px;
  border: 1px solid #ccc;
}

.add-book {
  display: flex;
  flex-direction: column;
}

button {
  padding: 10px;
  border: none;
  border-radius: 6px;
  cursor: pointer;
  color: white;
  margin-top: 5px;
}

.add-book button {
  background: #2563eb;
}

.book {
  background: #f9fafb;
  padding: 15px;
  margin-top: 15px;
  border-radius: 8px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.actions button {
  margin-left: 5px;
}

.remove {
  background: #dc2626;
}

.edit {
  background: #16a34a;
}

.category {
  font-size: 13px;
  color: #555;
}