/* Basic Reset */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: Arial, sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: #191919;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

header {
    background: #223951;
    color: #fff;
    padding: 1rem 0;
    text-align: center;
}

header h1 {
    margin: 0;
}

main {
    flex: 1;
    padding: 20px;
}

.chat-container {
    max-width: 800px;
    margin: 0 auto;
    padding: 20px;
    background: #191919;
    box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
}

footer {
    background: #333;
    color: #fff;
    text-align: center;
    padding: 1rem 0;
}

/* Responsive Design */
@media screen and (max-width: 768px) {
    .chat-container {
        width: 100%;
        padding: 10px;
    }
}