:root {
            --dark-bg: #0f0f0f; 
            --glass-bg: rgba(25, 25, 25, 0.8);
            --accent: #00ffcc;
        }

        body {
            background-color: var(--dark-bg);
            font-family: 'Inter', sans-serif;
            backdrop-filter: blur(20px);
        }

        .glass-card {
            background: var(--glass-bg);
            border-radius: 2rem;
            backdrop-filter: blur(20px);
            border: 1px solid rgba(255, 255, 255, 0.1);
            box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
        }

        .gradient-border {
            background: linear-gradient(45deg, #00ffcc, #7d5fff, #00ffcc);
            background-size: 400% 400%;
            animation: gradient 5s ease infinite;
        }

        @keyframes gradient {
            0% {background-position: 0% 50%;}
            50% {background-position: 100% 50%;}
            100% {background-position: 0% 50%;}
        }

        .hover-glow:hover {
            box-shadow: 0 0 15px rgba(0, 255, 204, 0.4);
            transform: translateY(-2px);
        }

        .output-box {
            min-height: 400px;
            background: linear-gradient(135deg, #1a1a1a, #2a2a2a);
            border-radius: 1.5rem;
            display: flex;
            align-items: center;
            justify-content: center;
            overflow: hidden;
            transition: all 0.3s ease;
        }

        .seo-keywords {
            font-size: 0.85rem;
            color: #888;
        }