body {font-family: Arial, Helvetica, sans-serif;}
* {box-sizing: border-box;}

.form-inline {  
  display: flex;
  flex-flow: row wrap;
  align-items: center;
}

.form-inline label {
  margin: 5px 10px 5px 0;
}

.form-inline input {
  vertical-align: middle;
  margin: 5px 10px 5px 0;
  padding: 10px;
  background-color: #fff;
  border: 1px solid #ddd;
}

.form-inline button {
  padding: 10px 20px;
  background-color: dodgerblue;
  border: 1px solid #ddd;
  color: white;
  cursor: pointer;
}

.form-inline button:hover {
  background-color: royalblue;
}

@media (max-width: 800px) {
  .form-inline input {
    margin: 10px 0;
  }
  
  .form-inline {
    flex-direction: column;
    align-items: stretch;
  }
}

   /* The Modal (background) */
.modal {
  display: none; /* Hidden by default */
  position: fixed; /* Stay in place */
  z-index: 1; /* Sit on top */
  left: 0;
  top: 0;
  width: 100%; /* Full width */
  height: 100%; /* Full height */
  overflow: auto; /* Enable scroll if needed */
  background-color: rgb(0,0,0); /* Fallback color */
  background-color: rgba(0,0,0,0.4); /* Black w/ opacity */
}

/* Modal Content/Box */
.modal-content {
  background-color: #fefefe;
  margin: 15% auto; /* 15% from the top and centered */
  padding: 20px;
  border: 1px solid #888;
  width: 80%; /* Could be more or less, depending on screen size */
}

/* The Close Button */
.close {
  color: #aaa;
  float: right;
  font-size: 28px;
  font-weight: bold;
}

.close:hover,
.close:focus {
  color: black;
  text-decoration: none;
  cursor: pointer;
}