.container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 20px;
        }
        
        header {
            background-color: var(--primary);
            color: white;
            padding: 1.5rem 0;
            box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
            position: relative;
        }
        
        header .container {
            display: flex;
            flex-direction: column;
            align-items: center;
            justify-content: center;
        }
        
        .logo-container {
            display: flex;
            align-items: center;
            margin-bottom: 1rem;
        }
        
        .logo {
            font-size: 2.5rem;
            margin-right: 0.5rem;
        }
        
        header h1 {
            font-size: 2.2rem;
            font-weight: 600;
            margin-bottom: 0.5rem;
        }
        
        header p {
            font-size: 1.1rem;
            opacity: 0.9;
        }
        
        .app-container {
            display: flex;
            flex-wrap: wrap;
            gap: 30px;
            margin: 2rem 0;
        }
        
        .panel {
            background-color: white;
            border-radius: 12px;
            box-shadow: 0 8px 24px rgba(0, 0, 0, 0.08);
            padding: 25px;
            flex: 1;
            min-width: 300px;
            transition: transform 0.3s, box-shadow 0.3s;
        }
        
        .panel:hover {
            transform: translateY(-5px);
            box-shadow: 0 12px 30px rgba(0, 0, 0, 0.12);
        }
        
        .panel h2 {
            margin-bottom: 1.2rem;
            color: var(--primary);
            font-size: 1.5rem;
            font-weight: 600;
            position: relative;
            padding-bottom: 0.75rem;
        }
        
        .panel h2::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 60px;
            height: 3px;
            background-color: var(--primary);
            border-radius: 3px;
        }
        
        .file-drop-area {
            border: 2px dashed var(--primary-light);
            border-radius: 12px;
            padding: 40px 20px;
            text-align: center;
            cursor: pointer;
            transition: all 0.3s;
            margin-bottom: 1.5rem;
            position: relative;
            overflow: hidden;
        }
        
        .file-drop-area:hover, .file-drop-area.dragover {
            background-color: rgba(156, 39, 176, 0.05);
            border-color: var(--primary);
        }
        
        .file-drop-area p {
            margin: 0.5rem 0;
            color: var(--text-light);
        }
        
        .file-input {
            position: absolute;
            width: 100%;
            height: 100%;
            top: 0;
            left: 0;
            opacity: 0;
            cursor: pointer;
        }
        
        .preview-container {
            width: 100%;
            height: 350px;
            background-color: #f8f9fa;
            border-radius: 12px;
            overflow: hidden;
            position: relative;
            margin-bottom: 1.5rem;
            border: 1px solid rgba(0, 0, 0, 0.08);
        }
        
        .btn {
            display: inline-block;
            padding: 12px 24px;
            border: none;
            border-radius: 8px;
            cursor: pointer;
            font-weight: 600;
            text-align: center;
            transition: all 0.2s;
            font-size: 1rem;
            letter-spacing: 0.3px;
        }
        
        .btn-primary {
            background-color: var(--primary);
            color: white;
            box-shadow: 0 4px 10px rgba(156, 39, 176, 0.3);
        }
        
        .btn-primary:hover {
            background-color: var(--primary-dark);
            box-shadow: 0 6px 14px rgba(156, 39, 176, 0.4);
            transform: translateY(-2px);
        }
        
        .btn-secondary {
            background-color: var(--secondary);
            color: white;
            box-shadow: 0 4px 10px rgba(0, 188, 212, 0.3);
        }
        
        .btn-secondary:hover {
            background-color: var(--secondary-dark);
            box-shadow: 0 6px 14px rgba(0, 188, 212, 0.4);
            transform: translateY(-2px);
        }
        
        .btn-danger {
            background-color: var(--danger);
            color: white;
            box-shadow: 0 4px 10px rgba(244, 67, 54, 0.3);
        }
        
        .btn-danger:hover {
            background-color: #d32f2f;
            box-shadow: 0 6px 14px rgba(244, 67, 54, 0.4);
            transform: translateY(-2px);
        }
        
        .btn[disabled] {
            background-color: #bdbdbd;
            cursor: not-allowed;
            box-shadow: none;
            transform: none;
        }
        
        .options-container {
            margin: 1.5rem 0;
        }
        
        .option-group {
            margin-bottom: 1.2rem;
        }
        
        .option-group label {
            display: block;
            margin-bottom: 0.5rem;
            font-weight: 600;
            color: var(--text);
        }
        
        select, input[type="number"] {
            width: 100%;
            padding: 12px;
            border: 1px solid #e0e0e0;
            border-radius: 8px;
            font-size: 1rem;
            transition: all 0.2s;
            background-color: #fafafa;
        }
        
        select:focus, input[type="number"]:focus {
            border-color: var(--primary);
            outline: none;
            box-shadow: 0 0 0 3px rgba(156, 39, 176, 0.2);
        }
        
        .status {
            margin-top: 1.5rem;
            padding: 1rem;
            border-radius: 8px;
            font-weight: 500;
            transition: all 0.3s;
        }
        
        .status.success {
            background-color: rgba(76, 175, 80, 0.15);
            color: #2e7d32;
            border-left: 4px solid #4caf50;
        }
        
        .status.error {
            background-color: rgba(244, 67, 54, 0.15);
            color: #c62828;
            border-left: 4px solid #f44336;
        }
        
        .file-info {
            margin-top: 1.5rem;
            padding: 1.2rem;
            background-color: #f8f9fa;
            border-radius: 8px;
            border: 1px solid #e0e0e0;
            transition: all 0.3s;
        }
        
        .file-info h3 {
            color: var(--primary);
            margin-bottom: 1rem;
            font-size: 1.2rem;
        }
        
        .file-info p {
            margin-bottom: 0.7rem;
            color: var(--text);
        }
        
        footer {
            background-color: var(--dark);
            color: white;
            text-align: center;
            padding: 2rem 0;
            margin-top: auto;
        }
        
        .processing-overlay {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background-color: rgba(0, 0, 0, 0.6);
            backdrop-filter: blur(4px);
            display: flex;
            justify-content: center;
            align-items: center;
            z-index: 1000;
            visibility: hidden;
            opacity: 0;
            transition: all 0.3s;
        }
        
        .processing-overlay.show {
            visibility: visible;
            opacity: 1;
        }
        
        .processing-content {
            background-color: white;
            padding: 2.5rem;
            border-radius: 12px;
            text-align: center;
            box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
            max-width: 90%;
        }
        
        .spinner {
            width: 50px;
            height: 50px;
            margin: 0 auto 1.5rem;
            border: 4px solid rgba(156, 39, 176, 0.1);
            border-left-color: var(--primary);
            border-radius: 50%;
            animation: spin 1s linear infinite;
        }
        
        @keyframes spin {
            to { transform: rotate(360deg); }
        }
        
        .hidden {
            display: none;
        }
        
        /* Responsive adjustments */
        @media (max-width: 768px) {
            .app-container {
                flex-direction: column;
            }
            
            .panel {
                min-width: 100%;
            }
            
            header h1 {
                font-size: 1.8rem;
            }
        }
        
        /* Estilos para accesibilidad */
        .sr-only {
            position: absolute;
            width: 1px;
            height: 1px;
            padding: 0;
            margin: -1px;
            overflow: hidden;
            clip: rect(0, 0, 0, 0);
            white-space: nowrap;
            border-width: 0;
        }
        
        /* Animaciones */
        @keyframes fadeIn {
            from { opacity: 0; transform: translateY(10px); }
            to { opacity: 1; transform: translateY(0); }
        }
        
        .animate-fade-in {
            animation: fadeIn 0.5s ease-out forwards;
        }
        
         .navbar {
            background-color: var(--white-color);
            box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
            padding: 15px 0;
        }
        
        .navbar-brand {
            font-size: 1.8rem;
            font-weight: 700;
            color: var(--primary-color);
        }
        
        .navbar-brand span {
            font-size: 2rem;
            margin-right: 5px;
        }
        
        .nav-link {
            color: var(--dark-color);
            font-weight: 500;
            margin: 0 10px;
            transition: all 0.3s ease;
        }
        
        .nav-link:hover {
            color: var(--primary-color);
        }