* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: Arial, sans-serif;
  background: #0f172a;
  color: #e5e7eb;
}

.container {
  max-width: 900px;
  margin: 0 auto;
  padding: 40px 20px;
}

.hero {
  margin-bottom: 24px;
}

.hero h1 {
  margin: 0 0 8px;
  font-size: 2rem;
}

.subtitle {
  margin: 0;
  color: #94a3b8;
}

.card {
  background: #111827;
  border: 1px solid #334155;
  border-radius: 14px;
  padding: 24px;
  box-shadow: 0 10px 30px rgba(0,0,0,0.25);
}

label {
  display: block;
  margin-bottom: 10px;
  font-weight: bold;
}

textarea {
  width: 100%;
  padding: 14px;
  border-radius: 10px;
  border: 1px solid #475569;
  background: #0b1220;
  color: #e5e7eb;
  resize: vertical;
  font-size: 1rem;
}

.actions {
  margin-top: 16px;
  display: flex;
  gap: 10px;
}

button {
  padding: 10px 18px;
  border: none;
  border-radius: 10px;
  background: #2563eb;
  color: white;
  cursor: pointer;
  font-size: 1rem;
}

button.secondary {
  background: #475569;
}

button:hover {
  opacity: 0.92;
}

.response {
  margin-top: 24px;
}

.response h2 {
  margin-bottom: 10px;
  font-size: 1.1rem;
}

.answer {
  min-height: 140px;
  padding: 16px;
  border-radius: 10px;
  background: #0b1220;
  border: 1px solid #334155;
  white-space: pre-wrap;
  line-height: 1.6;
}