body {
            font-family: sans-serif;
            line-height: 1.6;
            max-width: 800px;
            margin: 0 auto;
            padding: 20px;
            color: #333;
        }

        header {
            border-bottom: 2px solid #333;
            margin-bottom: 20px;
        }

        nav a {
            margin-right: 15px;
            color: #000;
            display: block;
        }

        .converter-box {
            border: 2px dashed #ccc;
            padding: 40px;
            text-align: center;
            border-radius: 8px;
            background: #f9f9f9;
        }

        button {
            padding: 10px 20px;
            background: #000;
            color: #fff;
            border: none;
            cursor: pointer;
            border-radius: 4px;
        }

        section {
            margin-top: 40px;
        }

        .spinner {
            width: 16px;
            height: 16px;
            border: 2px solid #ffffff;
            border-bottom-color: transparent;
            border-radius: 50%;
            display: inline-block;
            animation: rotation 1s linear infinite;
            margin-left: 8px;
            vertical-align: middle;
        }

        /* Navigation Container Layout */
        header {
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 15px;
            padding: 20px 0;
            margin-bottom: 30px;
            border-bottom: 1px solid rgba(128, 128, 128, 0.2);
        }

        /* Nav Links Group */
        .nav-links {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
            align-items: center;
        }

        /* Individual Link Styling */
        .nav-links a {
            color: inherit;
            text-decoration: none;
            font-size: 14px;
            font-weight: 500;
            padding: 8px 14px;
            border-radius: 6px;
            background: rgba(128, 128, 128, 0.08);
            border: 1px solid rgba(128, 128, 128, 0.15);
            transition: all 0.2s ease;
            white-space: nowrap;
        }

        /* Hover Effect */
        .nav-links a:hover {
            background: rgba(59, 130, 246, 0.15);
            border-color: #3b82f6;
            color: #3b82f6;
            transform: translateY(-1px);
        }

        /* Active Page Indicator */
        .nav-links a.active {
            background: #3b82f6;
            border-color: #3b82f6;
            color: #ffffff;
            font-weight: 600;
            box-shadow: 0 2px 5px rgba(59, 130, 246, 0.3);
        }

        @keyframes rotation {
            0% {
                transform: rotate(0deg);
            }

            100% {
                transform: rotate(360deg);
            }
        }

        #convertBtn:disabled {
            background-color: #555;
            cursor: not-allowed;
            opacity: 0.8;
        }