* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }

        :root {
            --primary: #667eea;
            --secondary: #06cee9;
            --accent: #f093fb;
            --success: #10b981;
            --warning: #f59e0b;
            --error: #ef4444;
            --text-dark: #1f2937;
            --text-light: #6b7280;
            --bg-light: #f9fafb;
            --white: #ffffff;
            --border: #e5e7eb;
        }

        body {
            font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
         
            min-height: 100vh;
            display: flex;
            justify-content: center;
            align-items: center;
            padding: 20px;
            overflow-x: hidden;
        }

        body::before {
            content: '';
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: 
                radial-gradient(circle at 20% 50%, rgba(240, 147, 251, 0.15) 0%, transparent 50%),
                radial-gradient(circle at 80% 80%, rgba(102, 126, 234, 0.15) 0%, transparent 50%);
            pointer-events: none;
            z-index: 0;
        }

        .container-2col {
            display: flex;
            background: var(--white);
            border-radius: 24px;
            box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
            overflow: hidden;
            max-width: 1200px;
            width: 100%;
            position: relative;
            z-index: 1;
            animation: slideUp 0.6s ease-out;
        }

        @keyframes slideUp {
            from {
                opacity: 0;
                transform: translateY(30px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }

        /* Columna Izquierda */
        .col-left {
            flex: 1;
            background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
            padding: 60px 50px;
            color: var(--white);
            display: flex;
            flex-direction: column;
            justify-content: center;
            position: relative;
            overflow: hidden;
        }

        .col-left::before {
            content: '';
            position: absolute;
            top: -50%;
            right: -50%;
            width: 200%;
            height: 200%;
            background: radial-gradient(circle, rgba(255,255,255,0.1) 0%, transparent 70%);
            animation: float 20s infinite linear;
        }

        @keyframes float {
            0% { transform: translate(0, 0) rotate(0deg); }
            100% { transform: translate(50px, 50px) rotate(360deg); }
        }

        .left-content {
            position: relative;
            z-index: 1;
        }

        .logo-section {
            text-align: center;
            margin-bottom: 40px;
        }

        .logo-icon {
            font-size: 64px;
            margin-bottom: 20px;
            display: block;
            animation: pulse 3s ease-in-out infinite;
        }

        @keyframes pulse {
            0%, 100% { transform: scale(1); }
            50% { transform: scale(1.1); }
        }

        .col-left h1 {
            font-size: 48px;
            font-weight: 800;
            letter-spacing: 2px;
            margin-bottom: 15px;
            text-align: center;
        }

        .col-left > p {
            font-size: 18px;
            text-align: center;
            opacity: 0.95;
            line-height: 1.6;
            margin-bottom: 50px;
        }

        .benefits-list {
            display: flex;
            flex-direction: column;
            gap: 20px;
        }

        .benefit-item {
            display: flex;
            align-items: flex-start;
            gap: 15px;
            padding: 20px;
            background: rgba(255, 255, 255, 0.1);
            border-radius: 12px;
            backdrop-filter: blur(10px);
            transition: all 0.3s ease;
        }

        .benefit-item:hover {
            background: rgba(255, 255, 255, 0.15);
            transform: translateX(10px);
        }

        .benefit-icon {
            font-size: 28px;
            min-width: 40px;
        }

        .benefit-text h3 {
            font-size: 18px;
            font-weight: 600;
            margin-bottom: 5px;
        }

        .benefit-text p {
            font-size: 14px;
            opacity: 0.9;
            line-height: 1.5;
        }

        .trust-indicators {
            margin-top: 40px;
            padding: 20px;
            background: rgba(255, 255, 255, 0.1);
            border-radius: 12px;
            text-align: center;
        }

        .trust-indicators h4 {
            font-size: 14px;
            margin-bottom: 15px;
            opacity: 0.9;
        }

        .badges {
            display: flex;
            justify-content: center;
            gap: 10px;
            flex-wrap: wrap;
        }

        .badge {
            display: inline-block;
            padding: 8px 16px;
            background: rgba(255, 255, 255, 0.2);
            border-radius: 20px;
            font-size: 12px;
            font-weight: 600;
            backdrop-filter: blur(5px);
        }

        /* Columna Derecha - Formulario */
        .col-right {
            flex: 1;
            padding: 60px 50px;
            overflow-y: auto;
            max-height: 95vh;
        }

        .form-header {
            margin-bottom: 35px;
        }

        .form-header h2 {
            font-size: 32px;
            font-weight: 700;
            color: var(--text-dark);
            margin-bottom: 10px;
        }

        .form-header p {
            color: var(--text-light);
            font-size: 15px;
        }

        .mensaje {
            padding: 16px 20px;
            border-radius: 12px;
            margin-bottom: 25px;
            display: flex;
            align-items: center;
            gap: 12px;
            font-size: 14px;
            animation: slideIn 0.3s ease-out;
            font-weight: 500;
        }

        @keyframes slideIn {
            from {
                opacity: 0;
                transform: translateY(-10px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }

        .mensaje.error {
            background: #fee2e2;
            color: #991b1b;
            border: 2px solid #fecaca;
        }

        .mensaje.exito {
            background: #dcfce7;
            color: #166534;
            border: 2px solid #bbf7d0;
        }

        .form-group {
            margin-bottom: 25px;
        }

        label {
            display: block;
            font-weight: 600;
            margin-bottom: 10px;
            color: var(--text-dark);
            font-size: 14px;
        }

        .required {
            color: var(--error);
            margin-left: 4px;
        }

        input[type="text"],
        input[type="email"],
        input[type="password"] {
            width: 100%;
            padding: 14px 16px;
            border: 2px solid var(--border);
            border-radius: 12px;
            font-size: 15px;
            transition: all 0.3s ease;
            background: var(--bg-light);
            font-family: inherit;
        }

        input:focus {
            outline: none;
            border-color: var(--primary);
            background: var(--white);
            box-shadow: 0 0 0 4px rgba(102, 126, 234, 0.1);
        }

        input::placeholder {
            color: #9ca3af;
        }

        .password-strength {
            margin-top: 8px;
            height: 4px;
            background: var(--border);
            border-radius: 2px;
            overflow: hidden;
            opacity: 0;
            transition: opacity 0.3s ease;
        }

        .password-strength.active {
            opacity: 1;
        }

        .password-strength-bar {
            height: 100%;
            width: 0%;
            background: var(--error);
            transition: all 0.3s ease;
        }

        .password-strength-bar.weak { width: 33%; background: var(--error); }
        .password-strength-bar.medium { width: 66%; background: var(--warning); }
        .password-strength-bar.strong { width: 100%; background: var(--success); }

        .password-hint {
            font-size: 12px;
            color: var(--text-light);
            margin-top: 6px;
        }

        /* Selector de Planes */
        .plan-selector {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 15px;
            margin-top: 12px;
        }

        .plan-option {
            border: 3px solid var(--border);
            padding: 25px 20px;
            border-radius: 16px;
            cursor: pointer;
            text-align: center;
            transition: all 0.3s ease;
            background: var(--white);
            position: relative;
            overflow: hidden;
        }

        .plan-option::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
            opacity: 0;
            transition: opacity 0.3s ease;
        }

        .plan-option:hover {
            border-color: var(--primary);
            transform: translateY(-4px);
            box-shadow: 0 8px 20px rgba(102, 126, 234, 0.2);
        }

        .plan-option.selected {
            border-color: var(--primary);
            background: linear-gradient(135deg, rgba(102, 126, 234, 0.05) 0%, rgba(118, 75, 162, 0.05) 100%);
            box-shadow: 0 8px 20px rgba(102, 126, 234, 0.2);
        }

        .plan-option.selected::after {
            content: '✓';
            position: absolute;
            top: 12px;
            right: 12px;
            width: 28px;
            height: 28px;
            background: var(--primary);
            color: white;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: bold;
            font-size: 16px;
        }

        .plan-name {
            font-weight: 700;
            font-size: 18px;
            color: var(--text-dark);
            margin-bottom: 8px;
            position: relative;
            z-index: 1;
        }

        .plan-price {
            font-size: 32px;
            font-weight: 800;
            color: var(--primary);
            margin: 12px 0;
            position: relative;
            z-index: 1;
        }

        .plan-period {
            font-size: 13px;
            color: var(--text-light);
            position: relative;
            z-index: 1;
        }

        .plan-features {
            margin-top: 15px;
            padding-top: 15px;
            border-top: 1px solid var(--border);
            position: relative;
            z-index: 1;
        }

        .plan-feature {
            font-size: 13px;
            color: var(--text-light);
            margin-bottom: 6px;
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 6px;
        }

        .plan-badge {
            position: absolute;
            top: -8px;
            left: 50%;
            transform: translateX(-50%);
            background: linear-gradient(135deg, var(--warning) 0%, #f97316 100%);
            color: white;
            padding: 4px 12px;
            border-radius: 12px;
            font-size: 11px;
            font-weight: 700;
            text-transform: uppercase;
            letter-spacing: 0.5px;
        }

        button[type="submit"] {
            width: 100%;
            padding: 16px;
            background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
            color: var(--white);
            border: none;
            border-radius: 12px;
            font-size: 16px;
            font-weight: 600;
            cursor: pointer;
            transition: all 0.3s ease;
            box-shadow: 0 4px 15px rgba(102, 126, 234, 0.3);
            margin-top: 10px;
        }

        button[type="submit"]:hover {
            transform: translateY(-2px);
            box-shadow: 0 6px 20px rgba(102, 126, 234, 0.4);
        }

        button[type="submit"]:active {
            transform: translateY(0);
        }

        button[type="submit"]:disabled {
            opacity: 0.6;
            cursor: not-allowed;
            transform: none;
        }

        .footer-links {
            text-align: center;
            margin-top: 25px;
            padding-top: 25px;
            border-top: 1px solid var(--border);
            font-size: 14px;
            color: var(--text-light);
        }

        .footer-links a {
            color: var(--primary);
            text-decoration: none;
            font-weight: 600;
            transition: color 0.3s ease;
        }

        .footer-links a:hover {
            color: var(--secondary);
            text-decoration: underline;
        }

        .terms {
            font-size: 12px;
            color: var(--text-light);
            text-align: center;
            margin-top: 20px;
            line-height: 1.6;
        }

        .terms a {
            color: var(--primary);
            text-decoration: none;
        }

        .terms a:hover {
            text-decoration: underline;
        }

        /* Responsive */
        @media (max-width: 968px) {
            .container-2col {
                flex-direction: column;
            }

            .col-left {
                padding: 40px 30px;
            }

            .col-right {
                padding: 40px 30px;
                max-height: none;
            }

            .col-left h1 {
                font-size: 36px;
            }

            .plan-selector {
                grid-template-columns: 1fr;
            }
        }

        @media (max-width: 480px) {
            body {
                padding: 10px;
            }

            .container-2col {
                border-radius: 16px;
            }

            .col-left,
            .col-right {
                padding: 30px 20px;
            }

            .col-left h1 {
                font-size: 32px;
            }

            .form-header h2 {
                font-size: 26px;
            }
        }

        /* Accesibilidad */
        *:focus-visible {
            outline: 2px solid var(--primary);
            outline-offset: 2px;
        }

        @media (prefers-reduced-motion: reduce) {
            * {
                animation: none !important;
                transition: none !important;
            }
        }

        /* Loading state */
        .loading {
            pointer-events: none;
            opacity: 0.7;
        }

        .loading::after {
            content: '';
            position: absolute;
            top: 50%;
            left: 50%;
            width: 24px;
            height: 24px;
            border: 3px solid rgba(255, 255, 255, 0.3);
            border-top-color: white;
            border-radius: 50%;
            animation: spin 0.8s linear infinite;
        }

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