:root {
            --primary: #4361ee;
            --primary-dark: #3a56d4;
            --secondary: #7209b7;
            --accent: #f72585;
            --light: #f8f9fa;
            --dark: #212529;
            --success: #4cc9f0;
            --warning: #f8961e;
            --danger: #e63946;
            --gray: #6c757d;
            --border-radius: 12px;
            --shadow: 0 10px 30px rgba(0, 0, 0, 0.08);
            --transition: all 0.3s ease;
        }

  

      


        header {
            text-align: center;
            padding: 40px 20px;
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            color: white;
            border-radius: var(--border-radius);
            margin-bottom: 30px;
            box-shadow: var(--shadow);
        }

        .logo {
            font-size: 2.5rem;
            font-weight: 700;
            margin-bottom: 10px;
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 10px;
        }

        .logo-icon {
            font-size: 2.8rem;
        }

        header h1 {
            font-size: 2.2rem;
            margin-bottom: 15px;
        }

        header p {
            font-size: 1.1rem;
            max-width: 700px;
            margin: 0 auto 20px;
            opacity: 0.9;
        }

        .converter-app {
            background: white;
            border-radius: var(--border-radius);
            box-shadow: var(--shadow);
            padding: 30px;
            margin-bottom: 30px;
        }

        .app-header {
            display: flex;
            justify-content: space-between;
            align-items: center;
            margin-bottom: 25px;
            flex-wrap: wrap;
            gap: 15px;
        }

        .app-title {
            font-size: 1.8rem;
            color: var(--primary);
            font-weight: 600;
        }

        .controls {
            display: flex;
            gap: 15px;
            flex-wrap: wrap;
        }

        .btn {
            padding: 12px 24px;
            border: none;
            border-radius: 8px;
            font-weight: 600;
            cursor: pointer;
            transition: var(--transition);
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 0.95rem;
        }

        .btn-primary {
            background: var(--primary);
            color: white;
        }

        .btn-primary:hover {
            background: var(--primary-dark);
            transform: translateY(-2px);
        }

        .btn-outline {
            background: transparent;
            border: 2px solid var(--primary);
            color: var(--primary);
        }

        .btn-outline:hover {
            background: rgba(67, 97, 238, 0.1);
        }

        .btn-success {
            background: var(--success);
            color: white;
        }

        .btn-success:hover {
            background: #3ab3d6;
            transform: translateY(-2px);
        }

        .converter-area {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 30px;
            margin-bottom: 30px;
        }

        @media (max-width: 768px) {
            .converter-area {
                grid-template-columns: 1fr;
            }
        }

        .upload-area, .preview-area {
            border: 2px dashed #d1d5db;
            border-radius: var(--border-radius);
            padding: 30px;
            text-align: center;
            transition: var(--transition);
            min-height: 300px;
            display: flex;
            flex-direction: column;
            justify-content: center;
            align-items: center;
        }

        .upload-area.active {
            border-color: var(--primary);
            background: rgba(67, 97, 238, 0.05);
        }

        .upload-icon {
            font-size: 4rem;
            color: var(--gray);
            margin-bottom: 15px;
        }

        .upload-area h3, .preview-area h3 {
            margin-bottom: 15px;
            color: var(--dark);
        }

        .upload-area p {
            color: var(--gray);
            margin-bottom: 20px;
        }

        .file-input {
            display: none;
        }

        .image-preview {
            max-width: 100%;
            max-height: 250px;
            border-radius: 8px;
            display: none;
        }

        .settings-panel {
            background: #f8f9fa;
            border-radius: var(--border-radius);
            padding: 25px;
            margin-bottom: 30px;
        }

        .settings-title {
            font-size: 1.3rem;
            margin-bottom: 20px;
            color: var(--primary);
            display: flex;
            align-items: center;
            gap: 10px;
        }

        .settings-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
            gap: 20px;
        }

        .setting-group {
            margin-bottom: 15px;
        }

        .setting-group label {
            display: block;
            margin-bottom: 8px;
            font-weight: 500;
            color: var(--dark);
        }

        .select-control, .input-control {
            width: 100%;
            padding: 12px 15px;
            border: 1px solid #d1d5db;
            border-radius: 8px;
            font-size: 1rem;
            background: white;
            transition: var(--transition);
        }

        .select-control:focus, .input-control:focus {
            outline: none;
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(67, 97, 238, 0.2);
        }

        .range-container {
            display: flex;
            align-items: center;
            gap: 15px;
        }

        .range-value {
            min-width: 40px;
            text-align: center;
            font-weight: 600;
            color: var(--primary);
        }

        .actions {
            display: flex;
            justify-content: center;
            gap: 15px;
            margin-top: 20px;
        }

        .btn-convert {
            padding: 15px 40px;
            font-size: 1.1rem;
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            color: white;
            border: none;
            border-radius: 50px;
            font-weight: 600;
            cursor: pointer;
            transition: var(--transition);
            display: flex;
            align-items: center;
            gap: 10px;
            box-shadow: 0 4px 15px rgba(67, 97, 238, 0.3);
        }

        .btn-convert:hover {
            transform: translateY(-3px);
            box-shadow: 0 6px 20px rgba(67, 97, 238, 0.4);
        }

        .btn-convert:active {
            transform: translateY(-1px);
        }

        .features {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 25px;
            margin: 40px 0;
        }

        .feature-card {
            background: white;
            border-radius: var(--border-radius);
            padding: 25px;
            box-shadow: var(--shadow);
            transition: var(--transition);
            text-align: center;
        }

        .feature-card:hover {
            transform: translateY(-5px);
            box-shadow: 0 15px 30px rgba(0, 0, 0, 0.1);
        }

        .feature-icon {
            font-size: 2.5rem;
            color: var(--primary);
            margin-bottom: 15px;
        }

        .feature-card h3 {
            margin-bottom: 15px;
            color: var(--dark);
        }

        .feature-card p {
            color: var(--gray);
        }

        footer {
            text-align: center;
            padding: 30px 20px;
            background: var(--dark);
            color: white;
            border-radius: var(--border-radius);
            margin-top: 50px;
        }

        /*.footer-logo {*/
        /*    font-size: 1.8rem;*/
        /*    font-weight: 700;*/
        /*    margin-bottom: 15px;*/
        /*}*/

        .footer-links {
            display: flex;
            justify-content: center;
            gap: 20px;
            margin: 20px 0;
            flex-wrap: wrap;
        }

        .footer-links a {
            color: #adb5bd;
            text-decoration: none;
            transition: var(--transition);
        }

        .footer-links a:hover {
            color: white;
        }

        .copyright {
            margin-top: 20px;
            color: #6c757d;
            font-size: 0.9rem;
        }

        /* Loading spinner */
        .spinner {
            display: none;
            width: 40px;
            height: 40px;
            border: 4px solid rgba(67, 97, 238, 0.2);
            border-radius: 50%;
            border-top-color: var(--primary);
            animation: spin 1s ease-in-out infinite;
            margin: 20px auto;
        }

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

        /* Toast notification */
        .toast {
            position: fixed;
            bottom: 20px;
            right: 20px;
            padding: 15px 25px;
            background: var(--dark);
            color: white;
            border-radius: 8px;
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.2);
            transform: translateY(100px);
            opacity: 0;
            transition: var(--transition);
            z-index: 1000;
        }

        .toast.show {
            transform: translateY(0);
            opacity: 1;
        }

        .toast.success {
            background: var(--success);
        }

        .toast.error {
            background: var(--danger);
        }

        /* Responsive adjustments */
        @media (max-width: 576px) {
            .converter-app {
                padding: 20px 15px;
            }
            
            .app-header {
                flex-direction: column;
                align-items: flex-start;
            }
            
            .controls {
                width: 100%;
                justify-content: space-between;
            }
            
            .btn {
                padding: 10px 15px;
                font-size: 0.9rem;
            }
            
            .upload-area, .preview-area {
                padding: 20px 15px;
            }
        }