body {
  font-family: "Pretendard", "Noto Sans KR", sans-serif;
  background: linear-gradient(to bottom right, #a8d8ff, #ffffff);
}

.a4-paper {
  width: 210mm;
  max-width: 95%;
  min-height: 297mm;
  border: 1px solid #ccc;
  border-radius: 8px;
  background: #fff url('https://www.transparenttextures.com/patterns/paper-fibers.png');
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.15);
}

h1 {
  text-shadow: 1px 1px 4px rgba(0, 85, 170, 0.2);
}

.btn-primary {
  background-color: #007bff;
  border: none;
  transition: 0.3s;
}

.btn-primary:hover {
  background-color: #005fcc;
  transform: scale(1.05);
}

textarea {
  resize: none;
}