* {
     padding: 0;
     margin: 0;
     list-style-type: none;
}

body {
     font-family: Arial, Helvetica, Sans-serif;
     font-size: 1rem;
     background-color: #f3f3f3;
}
a {
  color: #245f9e;
  text-decoration: none;
}

header {
     padding: 50px 0 2rem 0;
     text-align: center;
}

.container {
     padding: 5px;
}

.flex-wrap {
     display: flex;
     margin: 0 auto;
     padding: 0;
}

#bmi-form,
.results-wrap {
     padding: 2rem;
}

@media only screen and (max-width: 500px) {

     #bmi-form,
     .results-wrap {
          padding: .5rem;
     }
}

.flex-wrap#calc-container {
     flex-direction: row;
     justify-content: space-between;
     width: 80%;
     max-height: 400px;
}

@media only screen and (max-width: 900px) {
     .flex-wrap#calc-container {
          flex-direction: column;
     }
}

form {
     background-color: #fff;
     flex: 1 1 40%;
     border: 1px solid #ccc;
     margin: 1rem;
     text-align: center;
     box-shadow: 0 2px 5px #333;
}

.form-group {
     margin: 1rem 0;
     width: 100%;
}

#imperial {
     display: none;
}

input.height-usa {
     width: 50px;
}

input[type="button"] {
     padding: 5px;
     background-color: #999;
     border: 1px solid #729799;
     border-radius: 2px;
}

input[type="button"]:hover {
     background-color: #64778d;
     cursor: pointer;
}

.results-wrap {
     flex: 0 1 40%;
     padding: 1rem;
     margin: 1rem;
     background-color: #fff;
     border: 1px solid #ccc;
     box-shadow: 0 2px 5px #333;
}

#results {
     display: none;
     flex-direction: row;
     justify-content: space-between;
     width: 80%;
}

@media only screen and (max-width: 768px) {
     #results {
          flex-direction: column;
     }
}

#results>ul {
     display: flex;
     flex-direction: column;
     justify-content: center;
     text-align: left;
}

@media only screen and (max-width: 768px) {
     #results>ul {
          text-align: center;
          padding: 1rem 0;
     }
}

.text-center {
     text-align: center;
}

label.visually-hidden {
     border: 0;
     clip: rect(0 0 0 0);
     height: 1px;
     margin: -1px;
     overflow: hidden;
     padding: 0;
     position: absolute;
     width: 1px;
}

#error-msg-wrap {
     border: 1px solid red;
     padding: 5px;
     display: none;
     margin-top: .5rem;
}

#error-msg-txt {
     color: red;
}

.colored-circle {
     background-color: #fff;
     height: 100px;
     width: 100px;
     border-radius: 50%;
     border: none;
     margin: 0 auto;
     box-shadow: 1px 1px 4px #333;
}


/* Animations */
@keyframes fadeIn {
     0% {
          opacity: 0;
     }

     25% {
          opacity: .1;
     }

     50% {
          opacity: .8;
     }

     100% {
          opacity: 1;
     }
}

#article {
     padding: 10% 10% 1%;
}