html,
body {
  height: 100%;
}

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

.center {
    display: block;
    margin-left: auto;
    margin-right: auto;

  }
.form-ausencias {
    width: 100%;
    max-width: 800px;
    padding: 10px;
    display: auto;
    margin-left: auto;
    margin-right: auto;
    margin: 0 auto;
  }

.form-ausencias .form-control {
    position: relative;
    box-sizing: border-box;
    height: auto;
    padding: 10px;
    font-size: 16px;
  } 
.form-signin {
  width: 100%;
  max-width: 330px;
  padding: 15px;
  margin: 0 auto;
}
.form-signin .checkbox {
  font-weight: 400;
}
.form-signin .form-control {
  position: relative;
  box-sizing: border-box;
  height: auto;
  padding: 10px;
  font-size: 16px;
}
.form-signin .form-control:focus {
  z-index: 2;
}