html {
  font-size: 13px;
}

@media (min-width: 768px) {
  html {
    font-size: 15px;
  }
}

.btn:focus, .btn:active:focus, .btn-link.nav-link:focus, .form-control:focus, .form-check-input:focus {
  box-shadow: 0 0 0 0.1rem white, 0 0 0 0.25rem #258cfb;
}

body, html {
  height: 100%;
  margin: 0;
  display: flex;
  flex-direction: column;
}

.content-area {
  flex: 1 1 auto;
  overflow: auto;
}

.column {
  height: 100%;
  display: flex;
  flex-direction: column;
}

.column-25 {
  flex: 0 0 25%;
}

.column-75 {
  flex: 1;
}

.column-left-auto {
  flex: 0 1 auto;
  min-width: 0;
}

.column-right-auto {
  flex: 1 1 0; 
}

.content-column-header {
  height: 3rem;
  min-height: 3rem;
}

.content-column {
  flex-grow: 1;
  overflow: auto;
}

footer {
  width: 100%;
  background: #f8f9fa;
  text-align: center;
  padding: 10px 0;
}