body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    margin: 0;
    background-color: #f4f4f9;
    color: #333;
}

nav {
    background-color: #fff;
    padding: 1rem;
    border-bottom: 1px solid #ddd;
    display: flex;
    align-items: center;
    gap: 1rem;
}

nav a {
    text-decoration: none;
    color: #007bff;
    font-weight: 500;
}

nav a:hover {
    text-decoration: underline;
}

#authButton {
    margin-left: auto;
    padding: 0.5rem 1rem;
    border: none;
    background-color: #007bff;
    color: white;
    border-radius: 5px;
    cursor: pointer;
}

#authButton:hover {
    background-color: #0056b3;
}

main {
    padding: 2rem;
}

#app-root h1 {
    color: #333;
}

/* Chat UI placeholders */
.chat-container {
    display: flex;
    flex-direction: column;
    height: 70vh;
    border: 1px solid #ccc;
    border-radius: 8px;
    background: #fff;
}

.message-list {
    flex-grow: 1;
    padding: 1rem;
    overflow-y: auto;
}

.message-input {
    display: flex;
    padding: 1rem;
    border-top: 1px solid #ccc;
}

.message-input input {
    flex-grow: 1;
    padding: 0.5rem;
    border: 1px solid #ddd;
    border-radius: 5px;
}

.message-input button {
    margin-left: 0.5rem;
    padding: 0.5rem 1rem;
    border: none;
    background-color: #007bff;
    color: white;
    border-radius: 5px;
    cursor: pointer;
}