.form-container {
            max-width: 1200px;
            margin: 50px auto;
            background: white;
            border-radius: 20px;
            box-shadow: 0 20px 60px rgba(0,0,0,0.3);
            overflow: hidden;
        }


        .form-header {
            background: linear-gradient(135deg, #000000 0%, #46515b 100%);
            color: white;
            padding: 3rem 2rem;
            text-align: center;
        }

        .form-header h1 {
            font-size: 2.5rem;
            margin-bottom: 0.5rem;
        }

        .form-header p {
            font-size: 1.1rem;
            opacity: 0.9;
        }

        /* Progress Bar */
        .progress-container {
            background: #e0e0e0;
            height: 8px;
            position: relative;
        }

        .progress-bar {
            background: linear-gradient(135deg, #666f76 0%, #333940 100%);
            height: 100%;
            width: 0%;
            transition: width 0.5s ease;
        }

        .progress-text {
            text-align: center;
            padding: 1rem;
            color: #666;
            font-size: 0.9rem;
        }

        .form-body {
            padding: 3rem 2rem;
        }

        .form-section {
            display: none;
            animation: fadeIn 0.5s ease;
        }

        .form-section.active {
            display: block;
        }

        @keyframes fadeIn {
            from {
                opacity: 0;
                transform: translateY(20px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }

        .section-title {
            font-size: 1.8rem;
            color: #0a1628;
            margin-bottom: 1.5rem;
            display: flex;
            align-items: center;
            gap: 1rem;
        }

        .section-title::before {
            content: '';
            width: 4px;
            height: 30px;
            background: #35393c;
            border-radius: 2px;
        }

        .section-subtitle {
            color: #666;
            margin-bottom: 2rem;
            font-size: 1rem;
        }

        .form-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 1.5rem;
            margin-bottom: 2rem;
        }

        .form-grid-3 {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 1.5rem;
            margin-bottom: 2rem;
        }

        .form-group {
            display: flex;
            flex-direction: column;
        }

        .form-group label {
            font-weight: 600;
            color: #0a1628;
            margin-bottom: 0.5rem;
            font-size: 0.95rem;
        }

        .form-group label .required {
            color: #f44336;
            margin-left: 2px;
        }

        .form-group input,
        .form-group select,
        .form-group textarea {
            padding: 0.9rem;
            border: 2px solid #847f7f;
            border-radius: 8px;
            font-size: 1rem;
            transition: all 0.3s ease;
            font-family: inherit;
        }

        .form-group input:focus,
        .form-group select:focus,
        .form-group textarea:focus {
            outline: none;
            border-color: #191c1f;
            box-shadow: 0 0 0 3px rgba(42, 45, 47, 0.1);
        }

        .form-group input.error,
        .form-group select.error,
        .form-group textarea.error {
            border-color: #f44336;
            background-color: #ffebee;
        }

        .error-message {
            color: #f44336;
            font-size: 0.85rem;
            margin-top: 0.3rem;
            display: none;
        }

        .error-message.show {
            display: block;
        }

        .form-group textarea {
            resize: vertical;
            min-height: 100px;
        }

        .file-upload {
            position: relative;
            display: inline-block;
            width: 100%;
        }

        .file-upload input[type="file"] {
            position: absolute;
            opacity: 0;
            width: 100%;
            height: 100%;
            cursor: pointer;
        }

        .file-upload-label {
            display: flex;
            align-items: center;
            justify-content: center;
            padding: 2rem;
            border: 2px dashed #0f1112;
            border-radius: 8px;
            background: #f5f5f5;
            cursor: pointer;
            transition: all 0.3s ease;
            text-align: center;
            flex-direction: column;
            gap: 0.5rem;
        }

        .file-upload-label:hover {
            background: #d5e2ec;
            border-color: #101417;
        }

        .file-upload-label.error {
            border-color: #f44336;
            background-color: #ffebee;
        }

        .file-upload-icon {
            font-size: 2rem;
            color: #252c33;
        }

        .file-name {
            margin-top: 0.5rem;
            font-size: 0.9rem;
            color: #666;
        }

        .radio-group {
            display: flex;
            gap: 2rem;
            margin-top: 0.5rem;
        }

        .radio-group.error {
            padding: 0.5rem;
            border-radius: 8px;
            background-color: #ffebee;
        }

        .radio-option {
            display: flex;
            align-items: center;
            gap: 0.5rem;
            cursor: pointer;
        }

        .radio-option input[type="radio"] {
            width: 20px;
            height: 20px;
            cursor: pointer;
        }

        .btn-container {
            display: flex;
            gap: 1rem;
            margin-top: 2rem;
        }

        .btn-Form {
            padding: 1.2rem 3rem;
            font-size: 1.1rem;
            font-weight: 600;
            border: none;
            border-radius: 10px;
            cursor: pointer;
            transition: all 0.3s ease;
            flex: 1;
        }

        .btn-primary {
            background: linear-gradient(135deg, #39424a 0%, #8b9aa9 100%);
            color: white;
        }

        .btn-primary:hover:not(:disabled) {
            transform: translateY(-2px);
            box-shadow: 0 10px 30px rgba(34, 36, 37, 0.4);
        }

        .btn-secondary {
            background: #e0e0e0;
            color: #666;
        }

        .btn-secondary:hover {
            background: #d0d0d0;
        }

        .btn:disabled {
            opacity: 0.5;
            cursor: not-allowed;
        }

        .loan-summary {
            background: linear-gradient(135deg, #e3f2fd 0%, #bbdefb 100%);
            padding: 2rem;
            border-radius: 15px;
            margin-bottom: 2rem;
        }

        .loan-summary h3 {
            color: #0a1628;
            margin-bottom: 1rem;
        }

        .summary-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
            gap: 1rem;
        }

        .summary-item {
            background: white;
            padding: 1rem;
            border-radius: 8px;
            text-align: center;
        }

        .summary-label {
            font-size: 0.85rem;
            color: #666;
            margin-bottom: 0.5rem;
        }

        .summary-value {
            font-size: 1.3rem;
            font-weight: bold;
            color: #1d2226;
        }

        @media (max-width: 768px) {
            .form-body {
                padding: 2rem 1rem;
            }

            .form-header h1 {
                font-size: 1.8rem;
            }

            .section-title {
                font-size: 1.4rem;
            }

            .btn-container {
                flex-direction: column;
            }
        }
    .btn-primary {
  background: linear-gradient(90deg, #000, #333); /* degradado negro */
  color: #fff;
  font-size: 18px;
  font-weight: 700;
  padding: 14px 32px;
  border: none;
  border-radius: 8px;
  box-shadow: 0 6px 16px rgba(0,0,0,0.4); /* sombra llamativa */
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.btn-primary:hover {
  background: linear-gradient(90deg, #111, #444);
  transform: scale(1.05); /* efecto de agrandarse */
  box-shadow: 0 8px 20px rgba(0,0,0,0.6);
}