html {
  font-size: 14px;
}

@media (min-width: 768px) {
  html {
    font-size: 16px;
  }
}

html {
  position: relative;
  min-height: 100%;
}

body {
  margin-bottom: 60px;
}

.mycenter {
    display: flex;
    justify-content: center;
}

.form-popup {
    display: none;
    position: absolute;
    background-color: lightgreen;
    color: black;
    top: 50%;
    left: 50%;
    margin-top: -200px;
    margin-left: -200px;
    width: 800px;
    height: 200px;
    border: 6px solid #ffff00;
    z-index: 9;
}