* {box-sizing: border-box;}

textarea,input  {
                font-family: Verdana, Arial, Tahoma, sans-serif;
                font-size:16px
            }

input[type=text], select, textarea {

  width: 100%;
  padding: 12px;
  border: 1px solid #808080;
  border-radius: 4px;
  box-sizing: border-box;
  margin-top: 6px;
  margin-bottom: 16px;
  resize: vertical;
}

input[type=submit] {
  background-color: #4CAF50;
  color: white;
  padding: 12px 20px;
  border: none;
  border-radius: 4px;
  cursor: pointer;
}

input[type=submit]:hover {
  background-color: #45a049;
}

.container {
  border-radius: 5px;
  background-color: #ffffff;
  padding: 20px;
}