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

        body {
            font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
            background-color: var(--primary);
            color: #ffffff;
            height: 100vh;
            overflow: hidden;
            display: flex;
        }

        /* Sidebar */
        .sidebar {
            width: 160px;
            background-color: var(--sidebar-bg);
            padding: 20px 0;
            display: flex;
            flex-direction: column;
            z-index: 1000;
        }

        .logo {
            display: flex;
            align-items: center;
            padding: 0 20px;
            margin-bottom: 30px;
        }

        .logo-icon {
            width: 24px;
            height: 24px;
            background: linear-gradient(135deg, #6366f1, #8b5cf6);
            border-radius: 4px;
            margin-right: 10px;
            position: relative;
        }

        .logo-icon::after {
            content: 'P';
            position: absolute;
            top: 50%;
            left: 50%;
            transform: translate(-50%, -50%);
            color: white;
            font-weight: bold;
            font-size: 14px;
        }

        .logo-text {
            font-size: 18px;
            font-weight: 600;
        }

        .nav-menu {
            list-style: none;
            flex-grow: 1;
        }

        .nav-item {
            margin-bottom: 8px;
        }

        .nav-link {
            display: flex;
            align-items: center;
            padding: 12px 20px;
            color: #9ca3af;
            text-decoration: none;
            font-size: 14px;
            transition: all 0.2s;
            border-radius: 8px;
            margin: 0 12px;
        }

        .nav-link:hover,
        .nav-link.active {
            background-color: #374151;
            color: white;
        }

        .nav-icon {
            width: 24px;
            height: 24px;
            margin-right: 12px;
            opacity: 0.7;
        }

        .nav-icon svg {
            width: 100%;
            height: 100%;
        }

        .settings-section {
            padding: 20px;
            border-top: 1px solid #374151;
            margin-top: auto;
        }

        .settings-link {
            display: flex;
            align-items: center;
            color: #9ca3af;
            text-decoration: none;
            font-size: 14px;
        }

        .settings-link:hover {
            color: white;
        }

        /* Main Content */
        .main-content {
            flex: 1;
            display: flex;
            flex-direction: column;
        }

        .container {
            display: flex;
            flex-direction: column;
            height: 100vh;
            max-width: 1200px;
            margin: 0 auto;
            padding: 20px;
            width: 100%;
        }

        .header {
            text-align: center;
            margin-bottom: 30px;
            padding-top: 50px;
        }

        .header .logo {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            margin-bottom: 20px;
            padding: 0;
        }

        .header .logo-icon {
            width: 40px;
            height: 40px;
            background: linear-gradient(135deg, #6366f1, #8b5cf6);
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: bold;
            font-size: 20px;
            margin-right: 0;
        }

        .header .logo-icon::after {
            content: 'P';
            position: static;
            transform: none;
        }

        .header .logo-text {
            font-size: 24px;
            font-weight: 600;
            color: #ffffff;
        }

        .chat-container {
            flex: 1;
            display: flex;
            flex-direction: column;
            background: rgba(255, 255, 255, 0.05);
            border-radius: 16px;
            overflow: hidden;
            backdrop-filter: blur(10px);
            border: 1px solid rgba(255, 255, 255, 0.1);
            z-index: inherit;
        }

        #chat {
            flex: 1;
            overflow-y: auto;
            padding: 20px;
            display: flex;
            flex-direction: column;
            gap: 16px;
        }

        .message {
            display: flex;
            gap: 12px;
            max-width: 80%;
            animation: slideIn 0.3s ease-out;
        }

        .message.user {
            align-self: flex-end;
            flex-direction: row-reverse;
        }

        .message.assistant {
            align-self: flex-start;
        }

        .message-avatar {
            width: 32px;
            height: 32px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 14px;
            font-weight: 600;
            flex-shrink: 0;
        }

        .message.user .message-avatar {
            background: linear-gradient(45deg, #10b981, #059669);
        }

        .message.assistant .message-avatar {
            background: linear-gradient(45deg, #6366f1, #8b5cf6);
        }

        .message-content {
            background: rgba(255, 255, 255, 0.1);
            padding: 12px 16px;
            border-radius: 12px;
            line-height: 1.5;
            word-wrap: break-word;
        }

        .message.user .message-content {
            background: linear-gradient(45deg, #10b981, #059669);
        }

        .typing-indicator {
            background: rgba(255, 255, 255, 0.1);
            padding: 12px 16px;
            border-radius: 12px;
            display: flex;
            align-items: center;
            gap: 8px;
            color: #a1a1aa;
        }

        .typing-dots {
            display: flex;
            gap: 4px;
        }

        .typing-dot {
            width: 6px;
            height: 6px;
            background: #6366f1;
            border-radius: 50%;
            animation: bounce 1.4s infinite;
        }

        .typing-dot:nth-child(2) {
            animation-delay: 0.2s;
        }

        .typing-dot:nth-child(3) {
            animation-delay: 0.4s;
        }

        #input-container {
            padding: 20px;
            background-color: var(--searchbar);
            display: flex;
            gap: 12px;
            align-items: flex-end;
        }

        #input {
            flex: 1;
            padding: 12px 16px;
            background: rgba(255, 255, 255, 0.1);
            border: 1px solid rgba(255, 255, 255, 0.2);
            border-radius: 12px;
            color: #ffffff;
            font-size: 14px;
            resize: none;
            min-height: 44px;
            max-height: 120px;
            font-family: inherit;
        }

        #input::placeholder {
            color: #71717a;
        }

        #input:focus {
            outline: none;
            border-color: #6366f1;
            box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
        }

        #send {
            padding: 12px 16px;
            background: linear-gradient(45deg, #6366f1, #8b5cf6);
            border: none;
            border-radius: 12px;
            color: #ffffff;
            font-weight: 600;
            cursor: pointer;
            transition: all 0.2s;
            height: 44px;
        }

        #send:hover {
            transform: translateY(-1px);
            box-shadow: 0 4px 12px rgba(99, 102, 241, 0.3);
        }

        #send:disabled {
            opacity: 0.5;
            cursor: not-allowed;
            transform: none;
        }

        .welcome-message {
            text-align: center;
            color: #a1a1aa;
            font-size: 14px;
            margin-top: 50px;
        }

        .error-message {
            background: rgba(239, 68, 68, 0.1);
            border: 1px solid rgba(239, 68, 68, 0.3);
            color: #fca5a5;
            padding: 12px 16px;
            border-radius: 8px;
            margin: 16px 0;
            font-size: 14px;
        }

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

        @keyframes bounce {
            0%, 80%, 100% {
                transform: scale(0);
            }
            40% {
                transform: scale(1);
            }
        }

        @media (max-width: 768px) {
            .sidebar {
                width: 60px;
            }
            
            .sidebar .logo-text,
            .nav-link span,
            .settings-link span {
                display: none;
            }
            
            .nav-link {
                justify-content: center;
                padding: 12px;
            }
            
            .settings-link {
                justify-content: center;
            }
            
            .container {
                padding: 10px;
            }
            
            .header {
                padding-top: 20px;
            }
            
            .message {
                max-width: 95%;
            }
        }

        .think-container {
    background: rgba(255, 255, 255, 0.1);
    border-left: 3px solid #6366f1;
    padding: 8px 12px;
    margin-bottom: 6px;
    font-size: 0.9em;
    color: #d1d5db;
    cursor: pointer;
    border-radius: 6px;
    max-width: 80%;
    transition: background 0.2s;
}

.think-container:hover {
    background: rgba(255, 255, 255, 0.15);
}

.think-content {
    display: none;
    margin-top: 5px;
    white-space: pre-wrap;
    color: #e5e7eb;
}

.think-container.open .think-content {
    display: block;
}