<rect class="case" width="300" height="200" x="10" y="10" rx="50" fill="dimgray"/>
<rect class="screen" width="200" height="160" x="30" y="30" rx="30" fill="deepskyblue"/>
<rect class="panel" width="50" height="90" x="245" y="70" rx="10" fill="black"/>
<rect class="button" width="30" height="15" x="255" y="80" rx="5" fill="red"/>
<rect class="button" width="30" height="15" x="255" y="105" rx="5" fill="gold"/>
<rect class="button" width="30" height="15" x="255" y="130" rx="5" fill="lime"/>
результат - 99%. Поможете? Различий не вижу, браузер Хром Версия 50.0.2661.102 m