body {
  font-family: 'Poppins', sans-serif;
  margin: 0;
  padding: 0;
  background-color: #f9fafb;
}

header {
  background-color: #333;
  padding: 20px;
  text-align: center;
}

header h1 {
  margin: 0;
  color: #fff;
  font-size: 32px;
  font-weight: 600;
}

main {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: calc(100vh - 100px);
  gap: 30px;
}

.intro-text {
  background-color: #fff;
  border-radius: 8px;
  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.1);
  padding: 30px;
  text-align: justify;
  width: 80%;
  max-width: 800px;
}

.text-container {
  background-color: #fff;
  border-radius: 8px;
  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.1);
  padding: 30px;
  text-align: justify;
  width: 80%;
  max-width: 800px;
}

textarea {
  font-size: 16px;
  line-height: 1.6;
  width: 100%;
  height: 200px;
  padding: 10px;
  border: 1px solid #ccc;
  border-radius: 4px;
  resize: none;
  overflow-y: scroll;
}

button {
  margin-top: 20px;
  padding: 12px 24px;
  background-color: #333;
  color: #fff;
  border: none;
  border-radius: 4px;
  cursor: pointer;
  font-size: 18px;
  transition: background-color 0.3s ease;
}

button:hover {
  background-color: #555;
}

.copy-message {
  display: none;
  position: fixed;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  background-color: rgba(0, 0, 0, 0.8);
  color: #fff;
  padding: 10px 20px;
  border-radius: 4px;
  z-index: 999;
}

.copy-message.show {
  display: block;
  animation: fadeOut 2s ease forwards;
}

@keyframes fadeOut {
  0% {
    opacity: 1;
  }
  90% {
    opacity: 1;
  }
  100% {
    opacity: 0;
    display: none;
  }
}

/* Media queries for mobile responsiveness */
@media screen and (max-width: 767px) {
  header h1 {
    font-size: 28px;
  }

  .intro-text,
  .text-container {
    width: 90%;
    padding: 20px;
  }

  textarea {
    font-size: 14px;
  }

  button {
    font-size: 16px;
  }
}