html { scroll-behavior: smooth; }
        body { background-color: #f1f5f9; color: #0f172a; transition: background-color 0.3s; }
        
        /* ÇOKLU DİL KONTROLÜ */
        body.lang-tr .en-text, body.lang-tr .ar-text { display: none !important; }
        body.lang-en .tr-text, body.lang-en .ar-text { display: none !important; }
        body.lang-ar .tr-text, body.lang-ar .en-text { display: none !important; }

        /* Scroll Progress Bar */
        .progress-container { width: 100%; height: 3px; position: absolute; bottom: 0; left: 0; }
        .progress-bar { height: 3px; background: linear-gradient(90deg, #14b8a6, #3b82f6); width: 0%; border-radius: 0 2px 2px 0; }

        /* Animasyon */
        .scroll-reveal { opacity: 0; transform: translateY(30px); transition: all 0.8s cubic-bezier(0.16, 1, 0.3, 1); }
        .scroll-reveal.active { opacity: 1; transform: translateY(0); }
        
        /* Premium Form Efektleri */
        .form-input {
            transition: all 0.3s ease;
        }
        .form-input:focus {
            box-shadow: 0 0 0 4px rgba(20, 184, 166, 0.15);
            border-color: #14b8a6;
            background-color: #ffffff;
        }
        
        /* Özel Checkbox Tasarımı */
        .custom-checkbox:checked {
            background-color: #0d9488;
            border-color: #0d9488;
        }