@font-face {
            font-family: 'SF Pro Text';
            src: url('https://developer.apple.com/fonts/SF-Pro.ttf') format('truetype');
        }

        @font-face {
            font-family: 'Noto Sans TC';
            src: url('https://fonts.googleapis.com/css2?family=Noto+Sans+TC&display=swap');
        }
        
        html:lang(zh-TW) {
            font-family: 'Noto Sans TC', sans-serif;
        }

        :root {
            --bg-color-light: white;
            --text-color-light: black;
            --bg-color-dark: black;
            --text-color-dark: white;
        }

        @media (prefers-color-scheme: light) {
            :root {
                --bg-color: var(--bg-color-light);
                --text-color: var(--text-color-light);
            }
        }

        @media (prefers-color-scheme: dark) {
            :root {
                --bg-color: var(--bg-color-dark);
                --text-color: var(--text-color-dark);
            }
        }

        body {
            font-family: 'SF Pro Text', sans-serif;
            display: flex;
            flex-direction: column;
            justify-content: space-between;
            align-items: center;
            height: 100vh;
            margin: 0;
            background: var(--bg-color);
            color: var(--text-color);
            overflow-x: hidden;
            position: relative;
            width: 100vw;
            transition: background 0.3s, color 0.3s;
        }

        html, body {
            max-width: 100%;
            overflow-x: hidden;
        }

         /* Responsive Design */
        @media (max-width: 768px) {
            .button-container {
                flex-direction: column;
                gap: 20px;
            }
            button, .github-icon {
                width: 80%;
            }
        }
        .container {
            display: flex;
            flex-direction: column;
            align-items: center;
            text-align: center;
            flex-grow: 1;
            justify-content: center;
            padding: 20px;
            width: 100%;
            box-sizing: border-box;
        }

        h1, p {
            margin-bottom: 30px;
            text-align: center;
        }

        .button-container {
            display: flex;
            justify-content: center;
            align-items: center;
            gap: 50px;
            width: 100%;
            flex-wrap: wrap;
            margin-bottom: 80px;
        }

        button{
            padding: 15px 20px;
            font-size: 16px;
            border: none;
            background: rgba(255, 255, 255, 0.2);
            box-shadow: 0 5px 10px rgba(255, 255, 255, 0.2); /* Soft floating effect */
            color: inherit;
            cursor: pointer;
            border: 1.6px solid #ebebeb;    
            border-radius: 5px;
            transition: background 0.3s;
            width: 150px;
            height: 50px;
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 10px;
            text-decoration: none;
            font-family: 'SF Pro Text', sans-serif;
        }

        button:hover {
            background: #b8b6b6;
        }

        .footer {
            width: 100%;
            height: 80px; /* optional: fixed height for vertical centering */
            background: rgba(255, 255, 255, 0.2);
            backdrop-filter: blur(3px);
            display: flex;
            justify-content: center;
            align-items: center;
            position: fixed;
            bottom: 0;
            left: 0;
            transition: transform 0.3s ease-in-out;
        }

        .footer-content {
            display: flex;
            flex-direction: column;
            align-items: center;
            text-align: center;
        }

        .github-icon {
            width: 24px;
            height: 24px;
            display: block;
        }

        .copyright {
            font-size: 0.65rem;
            color: #333; /* Optional: tweak for theme contrast */
            margin: 4px 0 0; /* small gap above text */
        }

        .footer-divider {
            width: 160px;
            border: none;
            border-top: 1px solid rgba(0, 0, 0, 0.3); /* You can adjust color for dark mode */
            margin: 6px 0;
        }

        /* Blob Animation */
        .background-blobs {
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            overflow: hidden;
            z-index: -1;
        }
        
        .blob {
            position: absolute;
            width: 80vw;
            height: 80vw;
            max-width: 500px;
            max-height: 500px;
            background: radial-gradient(circle, #5c9abf, #005f99, #0088cc);
            border-radius: 50%;
            filter: blur(100px);
            opacity: 0.8;
            animation: moveBlobs 10s infinite alternate ease-in-out;
        }
        
        .blob:nth-child(1) { top: 10%; left: 10%; animation-duration: 7s; }
        .blob:nth-child(2) { top: 50%; left: 60%; animation-duration: 8s; }
        .blob:nth-child(3) { top: 80%; left: 35%; animation-duration: 10s; }
        
        @keyframes moveBlobs {
            0% { transform: translateY(0px) translateX(0px) scale(1); }
            30% { transform: translateY(-30px) translateX(30px) scale(1.3); }
            60% { transform: translateY(-50px) translateX(50px) scale(1.5); }
            100% { transform: translateY(50px) translateX(-50px) scale(1.8); }
        }

        /* Hide floating footer on desktop */
        @media (min-width: 769px) {
            .footer {
                position: absolute;
            }
        }