body {
  margin: 0;
  font-family: 'Inter', sans-serif;
  background-color: #0e162a;
  color: #f8fafc;
}

header {
  padding: 1rem 2rem;
  background-color: #0e162a;
}

.header-logo {
  height: 48px;
}

.container {
  max-width: 980px;
  margin: auto;
  padding: 2rem;
  text-align: center;
}

h1 {
  font-size: 2.5rem;
  font-weight: 900;
  margin-bottom: 0.5rem;
}

.subheading {
  font-size: 1.1rem;
  color: #94a3b8;
  margin-bottom: 2.5rem;
  font-weight: 400;
}

.row {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 1.5rem;
  margin-bottom: 2rem;
}

.prompt-card {
  background: #1e293b;
  padding: 1.5rem;
  border-radius: 18px;
  box-shadow: 0 6px 20px rgba(0,0,0,0.4);
  flex: 2;
  min-width: 320px;
  max-width: 500px;
  text-align: left;
}

.chat-bubble {
  background-color: #1e293b;
  border-radius: 12px;
  padding: 1rem;
  margin-bottom: 1rem;
  display: flex;
  align-items: flex-start;
  gap: 0.5rem;
}

.chat-bubble.user {
  background-color: #334155;
  color: white;
}

.chat-bubble.response {
  background-color: #1e293b;
  color: #cbd5e1;
}

.chat-icon {
  width: 28px;
  height: 28px;
}

.input-group {
  display: flex;
  margin-top: 1rem;
}

input[type="text"], .email {
  flex: 1;
  padding: 0.75rem;
  border-radius: 10px 0 0 10px;
  border: none;
  font-size: 1rem;
}

.send {
  background-color: #334155;
  color: white;
  border: none;
  padding: 0 1.4rem;
  font-size: 1.2rem;
  border-radius: 0 10px 10px 0;
  cursor: pointer;
}

.card {
  background: #1e293b;
  padding: 1.5rem;
  border-radius: 18px;
  box-shadow: 0 6px 20px rgba(0,0,0,0.4);
  flex: 1;
  min-width: 280px;
  max-width: 400px;
  text-align: left;
}

.card h3 {
  margin-top: 0;
}

.icon {
  width: 36px;
  margin-bottom: 1rem;
}

.btn {
  padding: 0.7rem 1.4rem;
  border: none;
  border-radius: 10px;
  font-weight: bold;
  font-size: 1rem;
  margin-top: 1rem;
  cursor: pointer;
}

.btn.yellow {
  background-color: #facc15;
  color: #1e293b;
}

.btn.blue {
  background-color: #3b82f6;
  color: #fff;
}

.signup {
  margin-top: 3rem;
}