<?xml version="1.0" encoding="UTF-8"?>
<ui version="4.0">
 <class>MainWindow</class>
 <widget class="QMainWindow" name="MainWindow">
  <property name="geometry">
   <rect>
    <x>0</x>
    <y>0</y>
    <width>597</width>
    <height>404</height>
   </rect>
  </property>
  <property name="windowTitle">
   <string>MainWindow</string>
  </property>
  <property name="styleSheet">
   <string notr="true">background-color: rgb(0, 196, 255);</string>
  </property>
  <widget class="QWidget" name="centralwidget">
   <layout class="QGridLayout" name="gridLayout">
    <item row="1" column="1">
     <widget class="QLineEdit" name="lineEdit"/>
    </item>
    <item row="2" column="0">
     <spacer name="horizontalSpacer_3">
      <property name="orientation">
       <enum>Qt::Horizontal</enum>
      </property>
      <property name="sizeHint" stdset="0">
       <size>
        <width>186</width>
        <height>20</height>
       </size>
      </property>
     </spacer>
    </item>
    <item row="3" column="1">
     <widget class="QCheckBox" name="checkBox">
      <property name="text">
       <string>CheckBox</string>
      </property>
     </widget>
    </item>
    <item row="0" column="2">
     <spacer name="horizontalSpacer_6">
      <property name="orientation">
       <enum>Qt::Horizontal</enum>
      </property>
      <property name="sizeHint" stdset="0">
       <size>
        <width>40</width>
        <height>20</height>
       </size>
      </property>
     </spacer>
    </item>
    <item row="1" column="0">
     <spacer name="horizontalSpacer">
      <property name="orientation">
       <enum>Qt::Horizontal</enum>
      </property>
      <property name="sizeHint" stdset="0">
       <size>
        <width>186</width>
        <height>20</height>
       </size>
      </property>
     </spacer>
    </item>
    <item row="2" column="2">
     <spacer name="horizontalSpacer_4">
      <property name="orientation">
       <enum>Qt::Horizontal</enum>
      </property>
      <property name="sizeHint" stdset="0">
       <size>
        <width>134</width>
        <height>20</height>
       </size>
      </property>
     </spacer>
    </item>
    <item row="1" column="2">
     <spacer name="horizontalSpacer_2">
      <property name="orientation">
       <enum>Qt::Horizontal</enum>
      </property>
      <property name="sizeHint" stdset="0">
       <size>
        <width>134</width>
        <height>20</height>
       </size>
      </property>
     </spacer>
    </item>
    <item row="4" column="0">
     <spacer name="horizontalSpacer_7">
      <property name="orientation">
       <enum>Qt::Horizontal</enum>
      </property>
      <property name="sizeHint" stdset="0">
       <size>
        <width>40</width>
        <height>20</height>
       </size>
      </property>
     </spacer>
    </item>
    <item row="3" column="0">
     <spacer name="horizontalSpacer_9">
      <property name="orientation">
       <enum>Qt::Horizontal</enum>
      </property>
      <property name="sizeHint" stdset="0">
       <size>
        <width>40</width>
        <height>20</height>
       </size>
      </property>
     </spacer>
    </item>
    <item row="0" column="0">
     <spacer name="horizontalSpacer_5">
      <property name="orientation">
       <enum>Qt::Horizontal</enum>
      </property>
      <property name="sizeHint" stdset="0">
       <size>
        <width>40</width>
        <height>20</height>
       </size>
      </property>
     </spacer>
    </item>
    <item row="3" column="2">
     <spacer name="horizontalSpacer_10">
      <property name="orientation">
       <enum>Qt::Horizontal</enum>
      </property>
      <property name="sizeHint" stdset="0">
       <size>
        <width>40</width>
        <height>20</height>
       </size>
      </property>
     </spacer>
    </item>
    <item row="4" column="2">
     <spacer name="horizontalSpacer_8">
      <property name="orientation">
       <enum>Qt::Horizontal</enum>
      </property>
      <property name="sizeHint" stdset="0">
       <size>
        <width>40</width>
        <height>20</height>
       </size>
      </property>
     </spacer>
    </item>
    <item row="5" column="0">
     <spacer name="horizontalSpacer_11">
      <property name="orientation">
       <enum>Qt::Horizontal</enum>
      </property>
      <property name="sizeHint" stdset="0">
       <size>
        <width>40</width>
        <height>20</height>
       </size>
      </property>
     </spacer>
    </item>
    <item row="6" column="0">
     <spacer name="horizontalSpacer_13">
      <property name="orientation">
       <enum>Qt::Horizontal</enum>
      </property>
      <property name="sizeHint" stdset="0">
       <size>
        <width>40</width>
        <height>20</height>
       </size>
      </property>
     </spacer>
    </item>
    <item row="4" column="1">
     <widget class="QPushButton" name="pushButton">
      <property name="text">
       <string>PushButton</string>
      </property>
     </widget>
    </item>
    <item row="6" column="2">
     <spacer name="horizontalSpacer_14">
      <property name="orientation">
       <enum>Qt::Horizontal</enum>
      </property>
      <property name="sizeHint" stdset="0">
       <size>
        <width>40</width>
        <height>20</height>
       </size>
      </property>
     </spacer>
    </item>
    <item row="5" column="2">
     <spacer name="horizontalSpacer_12">
      <property name="orientation">
       <enum>Qt::Horizontal</enum>
      </property>
      <property name="sizeHint" stdset="0">
       <size>
        <width>40</width>
        <height>20</height>
       </size>
      </property>
     </spacer>
    </item>
    <item row="0" column="1">
     <widget class="QLabel" name="label">
      <property name="font">
       <font>
        <pointsize>16</pointsize>
        <weight>75</weight>
        <italic>false</italic>
        <bold>true</bold>
        <underline>false</underline>
       </font>
      </property>
      <property name="layoutDirection">
       <enum>Qt::LeftToRight</enum>
      </property>
      <property name="text">
       <string>АВТОРИЗАЦИЯ</string>
      </property>
      <property name="alignment">
       <set>Qt::AlignCenter</set>
      </property>
     </widget>
    </item>
    <item row="2" column="1">
     <widget class="QLineEdit" name="lineEdit_2"/>
    </item>
    <item row="5" column="1">
     <widget class="QCommandLinkButton" name="commandLinkButton">
      <property name="enabled">
       <bool>true</bool>
      </property>
      <property name="text">
       <string>3233</string>
      </property>
     </widget>
    </item>
    <item row="6" column="1">
     <widget class="QCommandLinkButton" name="commandLinkButton_2">
      <property name="text">
       <string>2323</string>
      </property>
     </widget>
    </item>
   </layout>
  </widget>
 </widget>
 <resources/>
 <connections/>
</ui>

Нужно изменить чтобы все находилось в прямоугольнике с округленными концами, а на заднем плане был тот же фон, плюс блоки заполнения были белыми и округленными