body {
  font-family: 'Segoe UI', sans-serif;
  margin: 0;
  background: #f6f6f6;
  color: #333;
}

.hero {
  display: flex;
  justify-content: center;
  align-items: center;
  text-align: center;
  background: url('/img/van-banner.webp') no-repeat center center/cover;
  height: 50vh;
  padding: 2rem;
}

.hero-overlay {
  background: rgba(60, 90, 120, 0.8);
  padding: 2rem 2.5rem;
  border-radius: 1rem;
  color: white;
  box-shadow: 0 4px 10px rgba(0,0,0,0.2);
}

.hero-title {
  font-size: 2rem;
  font-weight: 700;
  margin-bottom: 1.2rem;
}

#ai-input {
  font-size: 1.1rem;
  padding: 0.6rem 1rem;
  border-radius: 0.5rem;
  border: 1px solid #ccc;
  width: 100%;
  max-width: 350px;
  background: #fff;
  box-shadow: inset 0 1px 3px rgba(0,0,0,0.1);
}

#ai-response {
  margin: 0.5rem auto 2rem auto;
  padding: 1.5rem;
  max-width: 700px;
  background: #fff;
  border-radius: 0.75rem;
  box-shadow: 0 4px 12px rgba(0,0,0,0.08);
  font-size: 1rem;
  line-height: 1.6;
}

.chat-bubble {
  background-color: #f0f8ff;
  padding: 1rem;
  border-left: 4px solid #0077cc;
  border-radius: 0.5rem;
}

#toggle-details {
  margin-top: 1rem;
  background: #005fa3;
  color: white;
  border: none;
  padding: 0.5rem 1rem;
  font-size: 0.95rem;
  border-radius: 6px;
  cursor: pointer;
  transition: background 0.2s;
}

#toggle-details:hover {
  background: #004c88;
}

.details-hidden {
  display: none;
}

.signature-img {
  margin-top: 1rem;
  max-width: 200px;
  border: 1px solid #ccc;
  border-radius: 4px;
  background: #f9f9f9;
  padding: 4px;
}