* {
  box-sizing: border-box;
  font-family: "Inter", system-ui, sans-serif;
}

body {
  margin: 0;
  background: linear-gradient(135deg, #0f2027, #203a43, #2c5364);
  color: #fff;
  min-height: 100vh;
  display: flex;
  justify-content: center;
  align-items: center;
}

.container {
  background: #111827;
  width: 100%;
  max-width: 720px;
  padding: 2rem;
  border-radius: 14px;
  box-shadow: 0 30px 60px rgba(0,0,0,0.4);
}

header {
  text-align: center;
  margin-bottom: 2rem;
}

header h1 {
  margin: 0;
  font-size: 1.8rem;
}

header p {
  color: #9ca3af;
}

.form-group {
  margin-bottom: 1rem;
}

label {
  display: block;
  font-size: 0.85rem;
  margin-bottom: 0.4rem;
  color: #9ca3af;
}

input, textarea {
  width: 100%;
  padding: 0.7rem;
  border-radius: 8px;
  border: none;
  background: #1f2933;
  color: #fff;
  outline: none;
}

input::placeholder,
textarea::placeholder {
  color: #6b7280;
}

.grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1rem;
}

button {
  width: 100%;
  margin-top: 1rem;
  padding: 0.8rem;
  background: #2563eb;
  border: none;
  border-radius: 10px;
  color: #fff;
  font-size: 1rem;
  cursor: pointer;
}

button:hover {
  background: #1d4ed8;
}

.response {
  margin-top: 2rem;
}

.response h3 {
  margin-bottom: 0.5rem;
  font-size: 1rem;
}

pre {
  background: #020617;
  padding: 1rem;
  border-radius: 10px;
  max-height: 250px;
  overflow-y: auto;
  font-size: 0.85rem;
}

/* Mobile */
@media (max-width: 600px) {
  .grid {
    grid-template-columns: 1fr;
  }
}