body {font-family: Arial, Helvetica, sans-serif;}
* {box-sizing: border-box}
input[type=text], input[type=tel] {
  width: 100%;
  padding: 15px;
  margin: 5px 0 22px 0;
  display: inline-block;
  border: none;
  background: #f1f1f1;
}

input[type=text]:focus, input[type=tel]:focus {
  background-color: #ddd;
  outline: none;
}
form{
    box-shadow: 0 0 10px rgba(0,0,0,0.5);
    width: 450px;
    margin: 10% auto;
    background-color: #2d323e;
}
b{
    color:#F1F1F1;
}
hr {
  border: 1px solid #f1f1f1;
  margin-bottom: 25px;
}
input[type=submit] {
  background-color: #2196F3;
  color: white;
  padding: 10px 20px;
  margin-left: 25%;
  font-size: 1.4em;
  border: none;
  cursor: pointer;
  opacity: 0.9;
  width:50%;
  margin-bottom: 15px;

}
::placeholder{
    font-size: 1.2em;
}
button:hover {
  opacity:1;
}
.container {
  padding: 16px;
}
.clearfix::after {
  content: "";
  clear: both;
  display: table;
}