:root {
            --primary: #0f172a;
            --primary-light: #1e293b;
            --accent: #38bdf8;
            --accent-glow: rgba(56, 189, 248, 0.4);
            --text-main: #f8fafc;
            --text-muted: #94a3b8;
            --bg-base: #020617;
            --glass-bg: rgba(15, 23, 42, 0.6);
            --glass-border: rgba(255, 255, 255, 0.08);
            --send-btn: #38bdf8;
        }

        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: 'Plus Jakarta Sans', sans-serif;
        }

        body {
            background-color: var(--bg-base);
            color: var(--text-main);
            min-height: 100vh;
            display: flex;
            flex-direction: column;
            overflow-x: hidden;
            background-image: linear-gradient(rgba(2, 6, 23, 0.5), rgba(2, 6, 23, 0.8)),
            url("../background/Pantai-Sulamadaha.jpg");
            background-size: cover;
            background-position: center;
            background-attachment: fixed;
        }

        /* Navbar */
        nav {
            padding: 1.5rem 5%;
            display: flex;
            justify-content: space-between;
            align-items: center;
            backdrop-filter: blur(10px);
            -webkit-backdrop-filter: blur(10px);
            border-bottom: 1px solid var(--glass-border);
            position: sticky;
            top: 0;
            z-index: 100;
            background: rgba(2, 6, 23, 0.7);
        }

        .logo {
            font-size: 1.5rem;
            font-weight: 800;
            background: linear-gradient(135deg, #fff 0%, #7dd3fc 100%);
            -webkit-background-clip: text;
            background-clip: text;
            -webkit-text-fill-color: transparent;
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }

        .nav-links {
            display: flex;
            gap: 1.5rem;
        }

        .btn {
            padding: 0.6rem 1.5rem;
            border-radius: 50px;
            font-size: 0.95rem;
            font-weight: 600;
            cursor: pointer;
            transition: all 0.3s ease;
            text-decoration: none;
        }

        .btn-ghost, .btn-primary {
            color: var(--text-main) !important;
            background: transparent;
            border: 1px solid var(--text-main); 
        }

        .btn-ghost:hover, .btn-primary:hover {
            color: var(--bg-base) !important; 
            background: var(--text-main);
            transform: translateY(-2px);
            box-shadow: 0 4px 15px rgba(255, 255, 255, 0.2);
        }

        /* Main Content */
        main {
            flex: 1;
            display: flex;
            flex-direction: column;
            align-items: center;
            padding: 4rem 1rem 2rem 1rem;
            max-width: 1200px;
            margin: 0 auto;
            width: 100%;
        }

        .hero {
            text-align: center;
            max-width: 800px;
            margin-bottom: 3rem;
            animation: fadeInDown 1s ease-out;
        }

        @keyframes fadeInDown {
            from {
                opacity: 0;
                transform: translateY(-20px);
            }

            to {
                opacity: 1;
                transform: translateY(0);
            }
        }

        .badge {
            display: inline-block;
            padding: 0.4rem 1rem;
            background: rgba(56, 189, 248, 0.1);
            color: var(--accent);
            border: 1px solid rgba(56, 189, 248, 0.2);
            border-radius: 50px;
            font-size: 0.85rem;
            font-weight: 600;
            margin-bottom: 1.5rem;
            box-shadow: 0 0 20px var(--accent-glow);
        }

        h1 {
            font-size: clamp(2.5rem, 5vw, 4rem);
            line-height: 1.1;
            font-weight: 800;
            margin-bottom: 1.5rem;
            letter-spacing: -0.05em;
        }

        .text-gradient {
            background: linear-gradient(to right, #fff, #7dd3fc, #38bdf8);
            -webkit-background-clip: text;
            background-clip: text;
            -webkit-text-fill-color: transparent;
        }

        p.subtitle {
            font-size: clamp(1rem, 2vw, 1.2rem);
            color: var(--text-muted);
            margin-bottom: 2rem;
            line-height: 1.6;
        }

        /* Chat Interface */
        .chat-container {
            width: 100%;
            max-width: 800px;
            background: var(--glass-bg);
            border: 1px solid var(--glass-border);
            border-radius: 20px;
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
            display: flex;
            flex-direction: column;
            height: 600px;
            overflow: hidden;
            animation: fadeInUp 1s ease-out 0.2s both;
            position: relative;
        }

        @keyframes fadeInUp {
            from {
                opacity: 0;
                transform: translateY(20px);
            }

            to {
                opacity: 1;
                transform: translateY(0);
            }
        }

        .chat-header {
            padding: 1.2rem 1.5rem;
            border-bottom: 1px solid var(--glass-border);
            display: flex;
            justify-content: space-between;
            align-items: center;
        }

        .ai-identity {
            display: flex;
            align-items: center;
            gap: 1rem;
        }

        .ai-avatar {
            width: 40px;
            height: 40px;
            background: linear-gradient(135deg, var(--accent), #0ea5e9);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.2rem;
            box-shadow: 0 0 15px var(--accent-glow);
        }

        .ai-info h3 {
            font-size: 1rem;
            font-weight: 600;
        }

        .ai-info p {
            font-size: 0.8rem;
            color: var(--accent);
            display: flex;
            align-items: center;
            gap: 0.3rem;
        }

        .ai-info p::before {
            content: '';
            display: block;
            width: 8px;
            height: 8px;
            background: var(--accent);
            border-radius: 50%;
            box-shadow: 0 0 5px var(--accent);
        }

        .login-prompt {
            font-size: 0.85rem;
            color: var(--text-muted);
            background: rgba(255, 255, 255, 0.05);
            padding: 0.5rem 1rem;
            border-radius: 50px;
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }

        .login-prompt a {
            color: var(--accent);
            text-decoration: none;
            font-weight: 600;
        }

        .login-prompt a:hover {
            text-decoration: underline;
        }

        .chat-messages {
            flex: 1;
            padding: 1.5rem;
            overflow-y: auto;
            display: flex;
            flex-direction: column;
            gap: 1rem;
            scroll-behavior: smooth;
        }

        /* Scrollbar styling */
        .chat-messages::-webkit-scrollbar {
            width: 6px;
        }

        .chat-messages::-webkit-scrollbar-track {
            background: transparent;
        }

        .chat-messages::-webkit-scrollbar-thumb {
            background: rgba(255, 255, 255, 0.1);
            border-radius: 10px;
        }

        .message {
            display: flex;
            gap: 1rem;
            max-width: 85%;
            animation: slideIn 0.3s ease-out forwards;
        }

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

            to {
                opacity: 1;
                transform: translateY(0);
            }
        }

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

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

        .msg-avatar {
            width: 35px;
            height: 35px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            flex-shrink: 0;
            font-size: 0.9rem;
        }

        .bot .msg-avatar {
            background: linear-gradient(135deg, var(--accent), #0ea5e9);
        }

        .user .msg-avatar {
            background: var(--text-main);
            color: var(--bg-base);
        }

        .msg-bubble {
            padding: 1rem 1.2rem;
            border-radius: 18px;
            font-size: 0.95rem;
            line-height: 1.5;
            position: relative;
        }

        .bot .msg-bubble {
            background: rgba(255, 255, 255, 0.05);
            border: 1px solid var(--glass-border);
            border-top-left-radius: 4px;
        }

        .user .msg-bubble {
            background: linear-gradient(135deg, rgba(255, 255, 255, 0.1), rgba(255, 255, 255, 0.05));
            border: 1px solid rgba(255, 255, 255, 0.1);
            border-top-right-radius: 4px;
        }

        .msg-body {
            display: flex;
            flex-direction: column;
            gap: 6px;
            max-width: 100%;
        }

        .user .msg-body {
            align-items: flex-end;
        }

        .bot .msg-body {
            align-items: flex-start;
        }

        /* ===== MESSAGE ACTIONS (Copy) ===== */
        .msg-actions {
            display: flex;
            gap: 8px;
            align-items: center;
            opacity: 0;
            transition: opacity 0.2s ease;
        }

        .message:hover .msg-actions {
            opacity: 1;
        }

        .msg-actions button {
            background: rgba(15, 23, 42, 0.6);
            border: 1px solid rgba(255, 255, 255, 0.1);
            color: var(--text-muted);
            height: 32px;
            padding: 0 10px;
            border-radius: 8px;
            cursor: pointer;
            font-size: 0.85rem;
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 6px;
            transition: all 0.2s ease;
            backdrop-filter: blur(4px);
            white-space: nowrap;
        }

        .msg-actions button:hover {
            background: rgba(255, 255, 255, 0.1);
            color: var(--text-main);
            transform: translateY(-2px);
            border-color: rgba(255, 255, 255, 0.3);
        }

        .copy-btn:hover {
            background: rgba(16, 185, 129, 0.2) !important;
            color: #10b981 !important;
            border-color: rgba(16, 185, 129, 0.3) !important;
        }

        .suggestion-chips {
            display: flex;
            flex-wrap: wrap;
            gap: 0.8rem;
            margin-top: 1rem;
        }

        .chip {
            background: rgba(56, 189, 248, 0.1);
            border: 1px solid rgba(56, 189, 248, 0.2);
            padding: 0.6rem 1.2rem;
            border-radius: 50px;
            font-size: 0.85rem;
            color: var(--text-main);
            cursor: pointer;
            transition: all 0.2s;
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }

        .chip:hover {
            background: rgba(56, 189, 248, 0.2);
            transform: translateY(-2px);
        }

        .chat-input-container {
            padding: 1.5rem;
            border-top: 1px solid var(--glass-border);
            background: rgba(2, 6, 23, 0.5);
            position: relative;
        }

        .input-wrapper {
            position: relative;
            display: flex;
            align-items: center;
            background: rgba(255, 255, 255, 0.03);
            border: 1px solid var(--glass-border);
            border-radius: 12px;
            padding: 0.5rem;
            transition: all 0.3s;
        }

        .input-wrapper:focus-within {
            border-color: rgba(56, 189, 248, 0.5);
            box-shadow: 0 0 15px rgba(56, 189, 248, 0.1);
            background: rgba(255, 255, 255, 0.05);
        }

        .chat-input {
            flex: 1;
            background: transparent;
            border: none;
            padding: 0.8rem 1rem;
            color: var(--text-main);
            font-size: 1rem;
            resize: none;
            outline: none;
        }

        .chat-input::placeholder {
            color: var(--text-muted);
        }

        .send-btn {
            background: var(--send-btn);
            color: var(--bg-base);
            border: none;
            width: 45px;
            height: 45px;
            border-radius: 10px;
            display: flex;
            align-items: center;
            justify-content: center;
            cursor: pointer;
            transition: all 0.2s;
            font-size: 1.2rem;
            margin-left: 0.5rem;
        }

        .send-btn:hover {
            transform: scale(1.05);
            box-shadow: 0 0 15px var(--accent-glow);
        }

        .send-btn:disabled {
            opacity: 0.5;
            cursor: not-allowed;
            transform: none;
            box-shadow: none;
        }

        .typing-indicator {
            display: none;
            padding: 1rem 1.2rem;
            background: rgba(255, 255, 255, 0.03);
            border-radius: 18px;
            border-top-left-radius: 4px;
            align-self: flex-start;
            margin-bottom: 1rem;
            margin-left: 3.2rem;
        }

        .typing-indicator.active {
            display: flex;
            align-items: center;
            gap: 0.3rem;
            animation: slideIn 0.3s ease-out forwards;
        }

        .dot {
            width: 6px;
            height: 6px;
            background: var(--text-muted);
            border-radius: 50%;
            animation: typing 1.4s infinite ease-in-out both;
        }

        .dot:nth-child(1) {
            animation-delay: -0.32s;
        }

        .dot:nth-child(2) {
            animation-delay: -0.16s;
        }

        @keyframes typing {

            0%,
            80%,
            100% {
                transform: scale(0);
                opacity: 0.5;
            }

            40% {
                transform: scale(1);
                opacity: 1;
            }
        }

        /* Format Markdown like content */
        .msg-bubble strong {
            color: var(--accent);
            font-weight: 600;
        }

        .msg-bubble br {
            margin-bottom: 0.5rem;
        }

        /* Footer */
        footer {
            text-align: center;
            padding: 2rem;
            color: var(--text-muted);
            font-size: 0.9rem;
            border-top: 1px solid var(--glass-border);
            margin-top: 4rem;
        }

        @media (max-width: 768px) {
            h1 {
                font-size: 2.2rem;
            }

            .chat-container {
                height: 75vh;
                border-radius: 0;
                border-left: none;
                border-right: none;
            }

            main {
                padding: 2rem 0 0 0;
            }

            nav {
                padding: 1rem;
            }

            .hero {
                padding: 0 1rem;
            }

            .message {
                max-width: 90%;
            }
        }