:root {
            --primary-color: #2563eb;
            --primary-hover: #1d4ed8;
            --bg-main: #f8f9fa;
            --bg-card: #ffffff;
            --border-color: #e5e7eb;
            --text-primary: #1f2937;
            --text-secondary: #6b7280;
            --success-color: #10b981;
            --radius: 12px;
        }

        * {
            font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
        }

        body {
            background: linear-gradient(135deg, #f5f7fa 0%, #e9ecef 100%);
            min-height: 100vh;
        }

        .main-container {
            max-width: 1000px;
            margin: 0 auto;
            padding: 2rem 1rem;
        }

        .header-section {
            text-align: center;
            margin-bottom: 3rem;
            padding: 2rem 0;
        }

        .logo-container {
            background: var(--bg-card);
            padding: 2rem;
            border-radius: var(--radius);
            box-shadow: 0 1px 3px rgba(0, 0, 0, 0.05);
            display: inline-block;
            margin-bottom: 1rem;
        }

        .logo-container img {
            max-width: 220px;
            height: auto;
            filter: drop-shadow(0 2px 4px rgba(0, 0, 0, 0.1));
        }

        .form-card {
            background: var(--bg-card);
            border-radius: var(--radius);
            box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
            border: none;
            overflow: hidden;
        }

        .form-card .card-body {
            padding: 2.5rem;
        }

        .section-title {
            font-size: 1.5rem;
            font-weight: 600;
            color: var(--text-primary);
            margin-bottom: 1.5rem;
            text-align: center;
        }

        .form-floating > label {
            color: var(--text-secondary);
            font-size: 0.875rem;
        }

        .form-control, .form-select {
            border: 1px solid var(--border-color);
            border-radius: 8px;
            padding: 0.75rem 1rem;
            font-size: 0.938rem;
            transition: all 0.2s ease;
        }

        .form-control:focus, .form-select:focus {
            border-color: var(--primary-color);
            box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
        }

        .form-floating > .form-control:focus ~ label,
        .form-floating > .form-control:not(:placeholder-shown) ~ label {
            color: var(--primary-color);
        }

        /* Estilos dos Cards de Planos */
        .plans-section {
            margin: 2rem 0;
        }

        .plans-title {
            font-size: 1.125rem;
            font-weight: 600;
            color: var(--text-primary);
            margin-bottom: 1rem;
        }

        .plans-container {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 1rem;
            margin-bottom: 1.5rem;
        }

        .plan-card {
            position: relative;
            background: var(--bg-card);
            border: 2px solid var(--border-color);
            border-radius: 10px;
            padding: 1.5rem;
            cursor: pointer;
            transition: all 0.3s ease;
        }

        .plan-card:hover {
            border-color: var(--primary-color);
            box-shadow: 0 4px 12px rgba(37, 99, 235, 0.15);
            transform: translateY(-2px);
        }

        .plan-card.selected {
            border-color: var(--primary-color);
            background: linear-gradient(135deg, rgba(37, 99, 235, 0.05) 0%, rgba(37, 99, 235, 0.02) 100%);
            box-shadow: 0 4px 12px rgba(37, 99, 235, 0.2);
        }

        .plan-card .check-icon {
            position: absolute;
            top: 1rem;
            right: 1rem;
            width: 24px;
            height: 24px;
            border-radius: 50%;
            border: 2px solid var(--border-color);
            background: white;
            display: flex;
            align-items: center;
            justify-content: center;
            transition: all 0.3s ease;
        }

        .plan-card.selected .check-icon {
            background: var(--primary-color);
            border-color: var(--primary-color);
        }

        .plan-card.selected .check-icon i {
            color: white;
        }

        .plan-name {
            font-size: 1.125rem;
            font-weight: 600;
            color: var(--text-primary);
            margin-bottom: 0.5rem;
        }

        .plan-price {
            font-size: 1.75rem;
            font-weight: 700;
            color: var(--primary-color);
            margin-bottom: 1rem;
        }

        .plan-price.free {
            color: var(--success-color);
        }

        .plan-description {
            font-size: 0.875rem;
            color: var(--text-secondary);
            line-height: 1.5;
        }

        .plan-features {
            list-style: none;
            padding: 0;
            margin-top: 1rem;
        }

        .plan-features li {
            font-size: 0.875rem;
            color: var(--text-secondary);
            padding: 0.25rem 0;
            display: flex;
            align-items: center;
        }

        .plan-features li i {
            color: var(--primary-color);
            margin-right: 0.5rem;
        }

        .btn-primary {
            background: var(--primary-color);
            border: none;
            border-radius: 8px;
            padding: 0.875rem 2rem;
            font-weight: 600;
            font-size: 1rem;
            transition: all 0.3s ease;
        }

        .btn-primary:hover {
            background: var(--primary-hover);
            transform: translateY(-1px);
            box-shadow: 0 4px 12px rgba(37, 99, 235, 0.3);
        }

        .modal-content {
            border: none;
            border-radius: var(--radius);
            box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
        }

        .modal-header {
            border-bottom: 1px solid var(--border-color);
            padding: 1.5rem;
        }

        .modal-title {
            font-weight: 600;
            color: var(--text-primary);
        }

        @media (max-width: 768px) {
            .form-card .card-body {
                padding: 1.5rem;
            }

            .plans-container {
                grid-template-columns: 1fr;
            }

            .logo-container img {
                max-width: 180px;
            }
        }

        .input-group-text {
            background: var(--bg-main);
            border: 1px solid var(--border-color);
            color: var(--text-secondary);
        }

        .readonly-field {
            background-color: var(--bg-main);
            cursor: not-allowed;
        }