header {
  background-color: #1a1a40;
  padding: 1em 2em;
  display: flex;
  justify-content: space-between;
  align-items: center;
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.3);
}

.logo {
  font-size: 1.5em;
  font-weight: bold;
  color: #5d8aff;
}

.logo a {
    text-decoration: none;
    color: #5d8aff;
}

.logo a:hover,
.logo a:focus {
    color: #5d8aff;
}

/* Buttons in header */
header .btn {
  background-color: #1f1f3b;
  color: #ffffff;
  border: none;
}

header .btn:hover, 
header .btn:focus {
  background-color: #343465;
  color: #ffffff;
  box-shadow: none;
}

/* Bootstrap dropdown menus */
.dropdown-menu {
  background-color: #1f1f3b;
  color: #ffffff;
  border: none;
}

.dropdown-menu .dropdown-header {
    color: #ffffff;
    font-size: inherit;
}

.dropdown-menu .dropdown-item {
  color: #ffffff;
}

.dropdown-menu .dropdown-item:hover,
.dropdown-menu .dropdown-item:focus {
  background-color: #343465;
  color: #ffffff;
}

/* Optional: remove default Bootstrap shadows for a flatter look */
.dropdown-menu {
  box-shadow: 0px 4px 8px rgba(0,0,0,0.4);
  border-radius: 4px;
}

.main {
  padding: 2em;
  text-align: center;
  font-size: 1.5em;
  color: #cccccc;
}