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

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: 'Space Grotesk', sans-serif;
            background: #0f0f0f;
            color: #e0e0e0;
            display: flex;
            flex-direction: column;
            align-items: center;
            padding: 1rem;
            overflow: auto;
        }

        /* HEADER */
        h1 {
            margin: 1rem 0;
            color: #00fff7;
            text-shadow: 0 0 12px rgba(0, 255, 247, 0.4);
            animation: glow 2s ease-in-out infinite alternate;
        }

        @keyframes glow {
            from {
                text-shadow: 0 0 8px rgba(0, 255, 247, 0.3);
            }

            to {
                text-shadow: 0 0 16px rgba(0, 255, 247, 0.7);
            }
        }

        /* CARDS */
        .card {
            backdrop-filter: blur(20px);
            background: rgba(20, 20, 20, 0.6);
            border: 1px solid rgba(0, 255, 247, 0.2);
            border-radius: 16px;
            padding: 1.5rem;
            width: 100%;
            max-width: 720px;
            box-shadow: 0 12px 32px rgba(0, 0, 0, 0.8);
            margin-bottom: 1.5rem;
            animation: fadeIn 0.5s ease both;
        }

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

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

        /* AUTH CARD */
        #authContainer {
            text-align: center;
        }

        /* API-KEY MODAL */
        #apiKeyModal {
            position: fixed;
            inset: 0;
            background: rgba(0, 0, 0, 0.85);
            display: flex;
            align-items: center;
            justify-content: center;
            backdrop-filter: blur(4px);
            z-index: 1000;
        }

        #apiKeyModal.hidden {
            display: none;
        }

        /* CHAT CARD */
        #chatApp {
            display: none;
            position: relative;
            height: calc(80vh);
            display: flex;
            flex-direction: column;
        }

        /* CHAT CONTAINER */
        #chatContainer {
            flex: 1;
            overflow-y: auto;
            background: rgba(20, 20, 20, 0.4);
            border: 1px solid rgba(0, 255, 247, 0.2);
            border-radius: 12px;
            padding: 1rem;
            margin-bottom: 0.5rem;
            display: flex;
            flex-direction: column;
            scrollbar-width: thin;
            scrollbar-color: rgba(0, 255, 247, 0.4) transparent;
        }

        #chatContainer::-webkit-scrollbar {
            width: 8px;
        }

        #chatContainer::-webkit-scrollbar-track {
            background: transparent;
        }

        #chatContainer::-webkit-scrollbar-thumb {
            background: rgba(0, 255, 247, 0.4);
            border-radius: 4px;
        }

        /* MESSAGES */
        .message {
            margin: 0.5rem 0;
            padding: 0.7rem 1rem;
            border-radius: 10px;
            max-width: 80%;
            word-wrap: break-word;
            opacity: 0;
            animation: msgIn 0.4s ease forwards;
        }

        @keyframes msgIn {
            to {
                opacity: 1;
            }
        }

        .user {
            background: rgba(0, 255, 247, 0.15);
            align-self: flex-end;
            color: #fff;
            text-align: right;
        }

        .bot {
            background: rgba(255, 255, 255, 0.1);
            align-self: flex-start;
            color: #e0e0e0;
            text-align: left;
        }

        /* INPUT FOOTER */
        .chat-input {
            display: flex;
            gap: 0.5rem;
        }

        .chat-input input {
            flex: 1;
            padding: 0.8rem;
            border-radius: 12px;
            border: none;
            background: #1a1a1a;
            color: #e0e0e0;
            font-size: 1rem;
            transition: box-shadow 0.3s ease;
        }

        .chat-input input:focus {
            outline: none;
            box-shadow: 0 0 8px rgba(0, 255, 247, 0.5);
        }

        /* MAIN CHAT/AUTH BUTTONS */
        button:not(.copy-btn) {
            background: #00fff7;
            color: #111;
            border: none;
            padding: 0.8rem 1.4rem;
            border-radius: 8px;
            cursor: pointer;
            transition: transform 0.15s ease, background 0.3s ease;
            font-size: 1rem;
            margin: 0.5rem;
        }

        button:not(.copy-btn):hover {
            background: #00d6c8;
            transform: scale(1.05);
        }

        button:not(.copy-btn):active {
            transform: scale(0.95);
        }

        /* SPINNER */
        #spinner {
            width: 36px;
            height: 36px;
            border: 4px solid rgba(255, 255, 255, 0.2);
            border-top: 4px solid #00fff7;
            border-radius: 50%;
            margin: 1rem auto;
            animation: spin 1s linear infinite;
            display: none;
        }

        @keyframes spin {
            to {
                transform: rotate(360deg);
            }
        }

        /* CODE BLOCK */
        .code-block {
            position: relative;
            background: #121212;
            border-radius: 8px;
            margin: 0.8rem 0;
            animation: fadeIn 0.4s ease both;
        }

        .code-block-header {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 0.4rem 1rem;
            background: rgba(0, 255, 247, 0.1);
            border-bottom: 1px solid rgba(0, 255, 247, 0.2);
        }

        .code-block-lang {
            font-size: 0.85rem;
            font-weight: 500;
            color: #00fff7;
        }

        .copy-btn {
            position: absolute;
            top: 8px;
            right: 8px;
            background: none;
            border: 1px solid #00fff7;
            color: #00fff7;
            padding: 0.3rem 0.6rem;
            border-radius: 4px;
            font-size: 0.8rem;
            transition: background 0.3s, color 0.3s;
            cursor: pointer;
        }

        .copy-btn:hover {
            background: #00fff7;
            color: #111;
        }

        .code-block pre {
            margin: 0;
            padding: 1rem;
            color: #e0e0e0;
            font-family: monospace;
            font-size: 0.9rem;
            background: #121212;
            overflow-x: auto;
        }

        /* FOOTER */
        footer {
            margin: 1rem 0;
            font-size: 0.8rem;
            color: #555;
            animation: fadeIn 1s ease both;
        }