* {
  box-sizing: border-box;
}


body {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
  margin: 0;
  font-family: Arial, sans-serif;
  background-color: #f4f4f4;
  padding: 0;
}

main {
  flex: 1;
  padding: 20px;
  display: flex;
  flex-direction: column;
  align-items: center;
}

#main-container {
  display: flex;
  flex-direction: column;
  align-items: center;
  max-width: 800px;
  margin: 0 auto;
}



header, footer {
  text-align: center;
  padding: 1em;
  background-color: #333;
  color: white;
}

.book-section {
  background: white;
  padding: 15px;
  margin: 15px auto;
  border-radius: 10px;
  max-width: 500px;
  box-shadow: 0 0 8px rgba(0,0,0,0.1);
}

.book-img img {
  width: 100%;
  max-width: 150px;
}

.input-line {
  margin-top: 10px;
  display: flex;
  gap: 10px;
}

input[type="text"] {
  flex-grow: 1;
  padding: 5px;
}

.input-line button {
  cursor: pointer;
}


@media (max-width: 480px) {
  .book-section {
    font-size: 0.95em;
    padding: 12px;
  }

  .price-likes {
    flex-direction: column;
    align-items: flex-start;
  }

  .input-line {
    flex-direction: column;
    width: 100%;
  }

  .input-line input[type="text"],
  .input-line button {
    width: 100%;
  }
}