@import url('https://fonts.googleapis.com/css2?family=Merriweather&display=swap');

body {
  font-family: 'Merriweather', Georgia, serif;
  background: linear-gradient(to bottom, #e0f2e9, #cfe8dc);
  color: #3e3e3e;
  margin: 0;
  padding: 2rem;
  display: flex;
  flex-direction: column;
  align-items: center;
  min-height: 100vh;
}

/* Title */
h1 {
  font-size: 2.5rem;
  color: #3a4f41;
  margin-bottom: 1rem;
}

/* Add Book Button */
#add-book-btn {
  background-color: #5e8c61;
  color: white;
  border: none;
  border-radius: 5px;
  padding: 0.6rem 1.2rem;
  font-size: 1rem;
  cursor: pointer;
  margin-bottom: 1rem;
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
  transition: background-color 0.3s;
}

#add-book-btn:hover {
  background-color: #4a7150;
}

.book-card {
  position: relative;
  background-color: #f4f8f4;
  border: 1px solid #c8d8c0;
  border-radius: 10px;
  padding: 1rem;
  width: 220px;
  box-shadow: 0 4px 10px rgba(0, 0, 0, 0.1);
  transition: transform 0.2s ease;
}

.book-card:hover {
  transform: translateY(-4px);
}

.book-card h3 {
  margin-top: 0;
  color: #3e5e47;
}

/* Remove button */
.remove-btn {
  position: absolute;
  top: 10px;
  right: 10px;
  border: none;
  background-color: transparent;
  font-size: 1.1rem;
  color: #a94442;
  cursor: pointer;
}

.remove-btn:hover {
  color: #7d2b2b;
}

/* Toggle Read Button */
.toggle-read-btn {
  margin-top: 0.5rem;
  padding: 0.4rem 0.6rem;
  color: white;
  border: none;
  border-radius: 4px;
  cursor: pointer;
  font-size: 0.9rem;
  transition: background-color 0.3s;
}

.read-status {
  font-weight: bold;
  color: #2d7c2d;
}

.not-read {
  font-weight: bold;
  color: #b22222;
}

/* Error message */
#error-message {
  background-color: #ffe6e6;
  border: 1px solid red;
  padding: 0.5rem;
  border-radius: 5px;
  margin-bottom: 1rem;
  color: #a00;
}

#form-container {
  width: 100%;
  display: flex;
  justify-content: center;
  margin-bottom: 2rem;
}

#book-form {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  justify-content: center;
  align-items: center;
  max-width: 1000px;
  width: 100%;
}

#book-form input[type="text"],
#book-form input[type="number"] {
  width: 200px;
  padding: 0.5rem;
  border-radius: 5px;
  border: 1px solid #ccc;
  font-family: inherit;
}

#book-form label {
  display: flex;
  align-items: center;
  font-size: 0.95rem;
  gap: 0.3rem;
}

#book-form input[type="checkbox"] {
  transform: scale(1.2);
}

#book-form button[type="submit"] {
  background-color: #5e8c61;
  color: white;
  border: none;
  border-radius: 5px;
  padding: 0.6rem 1.2rem;
  font-size: 1rem;
  cursor: pointer;
}

.hidden {
  display: none !important;
}

#library-container {
  display: flex;
  flex-wrap: wrap;
  gap: 1.5rem;
  justify-content: center;
  width: 100%;
  max-width: 1200px;
}