body {
            background: #f8fafc;
            min-height: 100vh;
            display: flex;
            align-items: center;
            justify-content: center;
            padding: 40px 20px;
            font-family: 'Inter', sans-serif;
        }
        .reg-box {
            background: #fff;
            border-radius: 16px;
            border: 1px solid #e2e8f0;
            box-shadow: 0 10px 40px rgba(0,0,0,0.06);
            width: 100%;
            max-width: 480px;
            padding: 36px 32px;
        }
        .reg-header {
            text-align: center;
            margin-bottom: 24px;
        }
        .logo-badge {
            width: 44px; height: 44px;
            background: var(--primary);
            color: #fff;
            border-radius: 12px;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            font-weight: 800;
            font-size: 20px;
            margin-bottom: 12px;
        }
        .reg-header h1 {
            font-size: 22px;
            font-weight: 800;
            color: var(--texto-fuerte);
            margin: 0 0 6px;
        }
        .reg-header p {
            font-size: 13.5px;
            color: var(--texto-suave);
            margin: 0;
        }
        .plan-selector-box {
            background: #f1f5f9;
            border-radius: 10px;
            padding: 12px 14px;
            margin-bottom: 20px;
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        .form-group {
            margin-bottom: 16px;
        }
        .form-group label {
            display: block;
            font-size: 12.5px;
            font-weight: 700;
            color: var(--texto-fuerte);
            margin-bottom: 6px;
        }
        .form-group input, .form-group select {
            width: 100%;
            padding: 10px 14px;
            border: 1.5px solid #cbd5e1;
            border-radius: 9px;
            font-size: 14px;
            font-family: inherit;
            box-sizing: border-box;
            background: #fff;
        }
        .form-group input:focus, .form-group select:focus {
            border-color: var(--primary);
            outline: none;
            box-shadow: 0 0 0 3px rgba(108,156,48,0.18);
        }
        .btn-submit {
            display: block;
            width: 100%;
            padding: 13px;
            background: var(--primary) !important;
            color: #ffffff !important;
            border: none;
            border-radius: 9px;
            font-size: 15px;
            font-weight: 700;
            cursor: pointer;
            transition: all 0.2s;
            margin-top: 12px;
            box-shadow: 0 4px 14px rgba(108, 156, 48, 0.25);
            opacity: 1 !important;
            visibility: visible !important;
        }
        .btn-submit:hover {
            background: var(--primary-hover) !important;
        }
        .msg-err {
            background: #fbeaea;
            color: #b23b3b;
            padding: 10px 14px;
            border-radius: 8px;
            font-size: 13px;
            font-weight: 600;
            margin-bottom: 18px;
        }