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

body {
  margin: 0;
  background: #0f172a;
  color: #e5e7eb;
  display: flex;
  justify-content: center;
  padding: 20px;
}

#app {
  width: 100%;
  max-width: 600px;
}

h1 {
  text-align: center;
}

#chat {
  background: #020617;
  border: 1px solid #1e293b;
  padding: 10px;
  height: 400px;
  overflow-y: auto;
  margin-bottom: 10px;
}

.message {
  margin-bottom: 8px;
}

.user {
  color: #38bdf8;
}

.ai {
  color: #a7f3d0;
}

form {
  display: flex;
  gap: 8px;
}

input {
  flex: 1;
  padding: 10px;
  border: none;
  outline: none;
}

button {
  padding: 10px 16px;
  cursor: pointer;
}