body {
  font-family: 'Segoe UI', 'Noto Sans TC', Arial, sans-serif;
  background: #f8f9fa;
  color: #222;
  margin: 0;
  padding: 0;
}

header {
  background: #fff;
  border-bottom: 1px solid #e0e0e0;
  padding: 1.5rem 1rem 1rem 1rem;
  text-align: center;
}

header h1 {
  margin: 0 0 0.5rem 0;
  font-size: 2rem;
  letter-spacing: 0.1em;
}

nav a {
  color: #0078d7;
  text-decoration: none;
  font-size: 1rem;
  margin-left: 1rem;
}

main {
  max-width: 700px;
  margin: 2rem auto;
  background: #fff;
  border-radius: 10px;
  box-shadow: 0 2px 8px rgba(0,0,0,0.06);
  padding: 2rem 1.5rem;
}

label {
  font-weight: 600;
  display: block;
  margin-bottom: 0.5rem;
}

textarea {
  width: 100%;
  min-height: 160px;
  font-size: 1.1rem;
  padding: 0.75rem;
  border: 1px solid #ccc;
  border-radius: 6px;
  resize: vertical;
  margin-bottom: 1.5rem;
  box-sizing: border-box;
  background: #f5f5f5;
  transition: border 0.2s;
}

textarea:focus {
  border: 1.5px solid #0078d7;
  outline: none;
  background: #fff;
}

#stats {
  margin-top: 1.5rem;
}

#stats h2 {
  font-size: 1.2rem;
  margin-bottom: 0.8rem;
}

#stats ul {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.7rem 1.5rem;
}

#stats li {
  font-size: 1rem;
  background: #f1f3f6;
  border-radius: 5px;
  padding: 0.5rem 0.8rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

#stats span {
  font-weight: bold;
  color: #0078d7;
}

footer {
  text-align: center;
  padding: 2rem 0 1rem 0;
  color: #888;
  font-size: 0.95rem;
}

.intro {
  background: #eaf4ff;
  border-left: 4px solid #0078d7;
  padding: 1rem 1.2rem;
  margin-bottom: 1.2rem;
  border-radius: 6px;
  font-size: 1.05rem;
  color: #234;
}

@media (max-width: 600px) {
  main {
    padding: 1rem 0.5rem;
  }
  #stats ul {
    grid-template-columns: 1fr;
  }
}