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

        body {
            font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
            padding: 20px;
            background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
            min-height: 100vh;
        }

        .demo-content {
            max-width: 800px;
            margin: 0 auto;
            background: white;
            padding: 40px;
            border-radius: 10px;
            box-shadow: 0 10px 40px rgba(0,0,0,0.1);
        }

        h1 {
            color: #333;
            margin-bottom: 10px;
        }

        p {
            color: #666;
            line-height: 1.6;
        }

        /* Chat Widget Styles */
        #chat-widget {
            position: fixed;
            bottom: 20px;
            right: 20px;
            z-index: 9999;
        }

        #chat-bubble {
            width: 60px;
            height: 60px;
            border-radius: 50%;
            background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
            box-shadow: 0 4px 12px rgba(0,0,0,0.15);
            cursor: pointer;
            display: flex;
            align-items: center;
            justify-content: center;
            transition: transform 0.3s ease;
            position: relative;
        }

        #chat-bubble:hover {
            transform: scale(1.1);
        }

        #chat-bubble svg {
            width: 30px;
            height: 30px;
            fill: white;
        }

        #unread-badge {
            position: absolute;
            top: -5px;
            right: -5px;
            background: #ff4444;
            color: white;
            border-radius: 50%;
            width: 24px;
            height: 24px;
            display: none;
            align-items: center;
            justify-content: center;
            font-size: 12px;
            font-weight: bold;
            border: 2px solid white;
        }

        #unread-badge.show {
            display: flex;
        }

        #chat-window {
            position: fixed;
            bottom: 20px;
            right: 20px;
            width: 360px;
            height: 520px;
            background: white;
            border-radius: 12px;
            box-shadow: 0 8px 32px rgba(0,0,0,0.2);
            display: none;
            flex-direction: column;
            overflow: hidden;
        }

        #chat-window.open {
            display: flex;
        }

        #chat-header {
            background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
            color: white;
            padding: 16px;
            display: flex;
            justify-content: space-between;
            align-items: center;
        }

        #chat-header h3 {
            margin: 0;
            font-size: 16px;
        }

        #close-chat {
            background: none;
            border: none;
            color: white;
            font-size: 24px;
            cursor: pointer;
            padding: 0;
            width: 30px;
            height: 30px;
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: 4px;
            transition: background 0.2s;
        }

        #close-chat:hover {
            background: rgba(255,255,255,0.2);
        }

        #chat-messages {
            flex: 1;
            overflow-y: auto;
            padding: 16px;
            background: #f5f5f5;
        }

        .message {
            margin-bottom: 12px;
            display: flex;
            flex-direction: column;
        }

        .message.user {
            align-items: flex-end;
        }

        .message.admin {
            align-items: flex-start;
        }

        .message-bubble {
            max-width: 75%;
            padding: 10px 14px;
            border-radius: 18px;
            word-wrap: break-word;
        }

        .message.user .message-bubble {
            background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
            color: white;
        }

        .message.admin .message-bubble {
            background: white;
            color: #333;
            border: 1px solid #e0e0e0;
        }

        .message-time {
            font-size: 11px;
            color: #999;
            margin-top: 4px;
            padding: 0 8px;
        }

        #chat-input-area {
            padding: 16px;
            background: white;
            border-top: 1px solid #e0e0e0;
            display: flex;
            gap: 8px;
        }

        #chat-input {
            flex: 1;
            padding: 10px 14px;
            border: 1px solid #ddd;
            border-radius: 20px;
            font-size: 14px;
            outline: none;
            font-family: inherit;
        }

        #chat-input:focus {
            border-color: #667eea;
        }

        #send-button {
            background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
            color: white;
            border: none;
            padding: 10px 20px;
            border-radius: 20px;
            cursor: pointer;
            font-weight: 600;
            transition: opacity 0.2s;
        }

        #send-button:hover {
            opacity: 0.9;
        }

        #send-button:disabled {
            opacity: 0.5;
            cursor: not-allowed;
        }

        .login-required {
            padding: 20px;
            text-align: center;
            color: #666;
        }

        .login-required button {
            margin-top: 10px;
            background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
            color: white;
            border: none;
            padding: 10px 24px;
            border-radius: 6px;
            cursor: pointer;
            font-weight: 600;
        }

        @media (max-width: 480px) {
            #chat-window {
                width: 100%;
                height: 100%;
                bottom: 0;
                right: 0;
                border-radius: 0;
            }
        }