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

body {
    font-family: 'DejaVu Sans', sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: #f5f5f5;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
}

/* Header */
.header {
    background-color: #fff;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
    padding: 1rem;
    margin-bottom: 2rem;
}

/* Chat container */
.chat-container {
    background-color: #fff;
    border-radius: 8px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
    padding: 20px;
    margin-bottom: 20px;
}

/* Messages */
.messages {
    height: 400px;
    overflow-y: auto;
    padding: 10px;
    border: 1px solid #ddd;
    border-radius: 4px;
    margin-bottom: 20px;
}

.message {
    margin-bottom: 10px;
    padding: 10px;
    border-radius: 4px;
}

.message.sent {
    background-color: #e3f2fd;
    margin-left: 20%;
}

.message.received {
    background-color: #f5f5f5;
    margin-right: 20%;
}

/* Controls */
.controls {
    display: flex;
    gap: 10px;
    margin-bottom: 20px;
}

.button {
    padding: 10px 20px;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    font-size: 16px;
    transition: background-color 0.3s;
}

.button.primary {
    background-color: #2196f3;
    color: white;
}

.button.primary:hover {
    background-color: #1976d2;
}

.button.secondary {
    background-color: #757575;
    color: white;
}

.button.secondary:hover {
    background-color: #616161;
}

/* Status indicators */
.status {
    display: inline-block;
    padding: 5px 10px;
    border-radius: 4px;
    font-size: 14px;
    margin-bottom: 10px;
}

.status.connected {
    background-color: #4caf50;
    color: white;
}

.status.disconnected {
    background-color: #f44336;
    color: white;
}

/* Responsive design */
@media (max-width: 768px) {
    .container {
        padding: 10px;
    }
    
    .controls {
        flex-direction: column;
    }
    
    .button {
        width: 100%;
    }
}