:root {
            --primary-color: #6e48aa;
            --secondary-color: #9d50bb;
            --accent-color: #4776E6;
            --text-color: #f8f9fa;
            --bg-dark: #121212;
            --bg-darker: #0a0a0a;
            --user-bubble: #6e48aa;
            --ai-bubble: #333344;
            --bubble-pointer: 12px;
            --transition-speed: 0.3s;
        }

        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 'Open Sans', 'Helvetica Neue', sans-serif;
        }

        body {
            background: var(--bg-dark);
            color: var(--text-color);
            overflow-x: hidden;
            height: 100vh;
            position: relative;
            touch-action: manipulation;
        }

        #particles-js {
            position: fixed;
            width: 100%;
            height: 100%;
            z-index: -1;
            background: linear-gradient(135deg, var(--bg-darker) 0%, var(--bg-dark) 100%);
        }

        .floating-icons {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            overflow: hidden;
            z-index: -1;
            pointer-events: none;
        }

        .floating-icon {
            position: absolute;
            opacity: 0.1;
            animation: float linear infinite;
        }

        .chat-container {
            display: flex;
            flex-direction: column;
            height: 100vh;
            width: 100%;
            overflow: hidden;
        }

        .chat-header {
            padding: 15px 20px;
            background: rgba(20, 20, 20, 0.8);
            backdrop-filter: blur(10px);
            display: flex;
            align-items: center;
            justify-content: center;
            border-bottom: 1px solid rgba(255, 255, 255, 0.1);
            z-index: 10;
        }

        .chat-header .logo {
            display: flex;
            align-items: center;
            gap: 10px;
        }

        .chat-header .logo i {
            font-size: 24px;
            color: var(--secondary-color);
            animation: pulse 2s infinite;
        }

        .chat-header .logo h1 {
            font-size: 20px;
            font-weight: 700;
            background: linear-gradient(to right, var(--secondary-color), var(--accent-color));
            -webkit-background-clip: text;
            background-clip: text;
            color: transparent;
        }

        .chat-messages {
            flex: 1;
            overflow-y: auto;
            -webkit-overflow-scrolling: touch;
            padding: 20px 15px 80px;
            display: flex;
            flex-direction: column;
            align-items: center;
            gap: 20px;
        }

        .message {
            max-width: 85%;
            min-width: 60%;
            padding: 15px 20px;
            border-radius: 20px;
            line-height: 1.5;
            position: relative;
            animation: fadeIn 0.4s ease-out;
            word-wrap: break-word;
            box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
        }

        .user-message {
            background: var(--user-bubble);
            color: white;
            align-self: flex-end;
            margin-right: 30px;
        }

        .user-message::after {
            content: '';
            position: absolute;
            right: -var(--bubble-pointer);
            top: 50%;
            transform: translateY(-50%);
            width: 0;
            height: 0;
            border-top: var(--bubble-pointer) solid transparent;
            border-bottom: var(--bubble-pointer) solid transparent;
            border-left: var(--bubble-pointer) solid var(--user-bubble);
        }

        .ai-message {
            background: var(--ai-bubble);
            align-self: flex-start;
            margin-left: 30px;
        }

        .ai-message::before {
            content: '';
            position: absolute;
            left: -var(--bubble-pointer);
            top: 50%;
            transform: translateY(-50%);
            width: 0;
            height: 0;
            border-top: var(--bubble-pointer) solid transparent;
            border-bottom: var(--bubble-pointer) solid transparent;
            border-right: var(--bubble-pointer) solid var(--ai-bubble);
        }

        .message-content {
            font-size: 16px;
        }

        .message-meta {
            display: flex;
            justify-content: space-between;
            align-items: center;
            margin-top: 10px;
            font-size: 12px;
            opacity: 0.8;
        }

        .message-role {
            font-weight: 600;
        }

        .message-role i {
            margin-right: 5px;
        }

        .message-time {
            font-style: italic;
        }

        .scroll-to-bottom {
            position: fixed;
            bottom: 70px;
            left: 50%;
            transform: translateX(-50%);
            width: 50px;
            height: 50px;
            border-radius: 50%;
            background: rgba(110, 72, 170, 0.8);
            backdrop-filter: blur(5px);
            border: 1px solid rgba(255, 255, 255, 0.2);
            display: flex;
            align-items: center;
            justify-content: center;
            cursor: pointer;
            transition: all var(--transition-speed);
            opacity: 0;
            visibility: hidden;
            z-index: 20;
        }

        .scroll-to-bottom.visible {
            opacity: 1;
            visibility: visible;
        }

        .scroll-to-bottom:hover {
            background: rgba(110, 72, 170, 1);
            transform: translateX(-50%) scale(1.1);
        }

        .scroll-to-bottom i {
            font-size: 20px;
            color: white;
        }

        /* Animations */
        @keyframes float {
            0% { transform: translateY(0) rotate(0deg); }
            100% { transform: translateY(-100vh) rotate(360deg); }
        }

        @keyframes pulse {
            0% { transform: scale(1); }
            50% { transform: scale(1.1); }
            100% { transform: scale(1); }
        }

        @keyframes fadeIn {
            from { opacity: 0; transform: translateY(10px); }
            to { opacity: 1; transform: translateY(0); }
        }

        /* Responsive adjustments */
        @media (max-width: 480px) {
            .message {
                max-width: 90%;
                min-width: 70%;
            }
            
            .user-message {
                margin-right: 20px;
            }
            
            .ai-message {
                margin-left: 20px;
            }
        }