html {
  font-size: 14px;
}

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

.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;
}

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

body {
  margin-bottom: 60px;
}

.form-floating > .form-control-plaintext::placeholder, .form-floating > .form-control::placeholder {
  color: var(--bs-secondary-color);
  text-align: end;
}

.form-floating > .form-control-plaintext:focus::placeholder, .form-floating > .form-control:focus::placeholder {
  text-align: start;
}

/* Premium dark-grey navbar */
.navbar-premium {
  background-color: #25282D;
  border-bottom: 1px solid #34383F;
  box-shadow: 0 2px 8px rgba(0,0,0,0.25);
  padding-top: .75rem;
  padding-bottom: .75rem;
}

.navbar-premium .container-fluid {
  align-items: center;
}

.navbar-premium .navbar-brand {
  color: #f1f3f5;
  font-weight: 600;
  letter-spacing: .3px;
  font-size: 1.25rem;
  transition: color .2s ease, opacity .2s ease, transform .2s ease;
}

.navbar-premium .navbar-brand:hover,
.navbar-premium .navbar-brand:focus {
  color: #ffffff;
  opacity: .9;
  transform: translateY(-1px);
  text-decoration: none;
}

.navbar-premium .navbar-toggler {
  border-color: rgba(255,255,255,.2);
}

.navbar-premium .navbar-toggler-icon {
  filter: invert(1) grayscale(1) brightness(200%);
}

/* Premium logout button */
.navbar-premium .btn-logout-premium {
  background-color: #e53935;
  border: none;
  padding: .5rem 1.1rem;
  border-radius: .5rem;
  font-weight: 500;
  letter-spacing: .2px;
  transition: background-color .2s ease, transform .2s ease, box-shadow .2s ease;
  box-shadow: 0 2px 6px rgba(229,57,53,0.25);
}

.navbar-premium .btn-logout-premium:hover,
.navbar-premium .btn-logout-premium:focus {
  background-color: #d32f2f;
  transform: translateY(-1px);
  box-shadow: 0 4px 10px rgba(229,57,53,0.35);
  color: #fff;
  text-decoration: none;
}

.navbar-premium .btn-logout-premium:active {
  transform: translateY(0);
  box-shadow: 0 1px 3px rgba(229,57,53,0.25);
}

/* Ensure vertical alignment */
.navbar-premium .navbar-nav {
  align-items: center;
}

/* Settings dropdown (premium dark) */
.navbar-premium .dropdown-toggle {
  color: #f1f3f5;
  font-weight: 500;
  letter-spacing: .2px;
  transition: color .2s ease, opacity .2s ease;
  cursor: pointer;
  text-decoration: none;
}

.navbar-premium .dropdown-toggle:hover,
.navbar-premium .dropdown-toggle:focus {
  color: #ffffff;
  opacity: .9;
}

.navbar-premium .dropdown-toggle::after {
  margin-left: .4rem;
  vertical-align: .15em;
}

.navbar-premium .dropdown-menu {
  background-color: #25282D;
  border: 1px solid #34383F;
  border-radius: .5rem;
  box-shadow: 0 8px 24px rgba(0,0,0,0.35);
  padding: .4rem 0;
  min-width: 12rem;
}

.navbar-premium .dropdown-item {
  color: #f1f3f5;
  padding: .55rem 1.1rem;
  font-weight: 500;
  letter-spacing: .2px;
  transition: background-color .15s ease, color .15s ease;
}

.navbar-premium .dropdown-item:hover,
.navbar-premium .dropdown-item:focus {
  background-color: #34383F;
  color: #ffffff;
}

.navbar-premium .dropdown-item:active {
  background-color: #4a5058;
  color: #ffffff;
}

/* Responsive tweaks */
@media (max-width: 576px) {
  .navbar-premium .navbar-brand {
    font-size: 1.1rem;
  }
  .navbar-premium .btn-logout-premium {
    padding: .4rem .9rem;
    font-size: .9rem;
  }
}