.theme-toggle-input {
  position: absolute;
  opacity: 0;
  pointer-events: none;
}

.theme-toggle-label {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: #f1f5f9;
  color: #1f2937;
  box-shadow: 0 6px 12px -6px rgba(15, 23, 42, 0.4);
  cursor: pointer;
  transition: transform 0.18s ease, box-shadow 0.18s ease, background 0.18s ease;
}

.theme-toggle-nav {
  display: inline-flex;
  align-items: center;
  margin-right: 1rem;
}

.theme-toggle-input:checked + .theme-toggle-label {
  background: #2563eb;
  color: #f8fafc;
  box-shadow: 0 6px 14px -6px rgba(37, 99, 235, 0.45);
}

body.dark-mode .theme-toggle-label {
  background: #525960;
  color: #f1f5f9;
}

body.dark-mode .theme-toggle-input:checked + .theme-toggle-label {
  background: #60a5fa;
  color: #1e293b;
}

body.dark-mode {
  background-color: #464d55;
}

body.dark-mode .main-header.navbar {
  background: linear-gradient(135deg, #596068, #3b4148) !important;
  border-bottom-color: rgba(148, 163, 184, 0.3);
  box-shadow: 0 14px 42px -22px rgba(17, 20, 24, 0.45);
}

body.dark-mode .main-header.navbar .navbar-nav .nav-link,
body.dark-mode .main-header.navbar .navbar-nav .dropdown-menu,
body.dark-mode .main-header.navbar .navbar-nav .dropdown-item {
  color: rgba(226, 232, 240, 0.82) !important;
  background: transparent;
}

body.dark-mode .main-header.navbar .navbar-nav .nav-link:hover,
body.dark-mode .main-header.navbar .navbar-nav .dropdown-item:hover {
  color: #90cdf4 !important;
  background: rgba(144, 205, 244, 0.18);
}

body.dark-mode .main-header.navbar .navbar-brand,
body.dark-mode .main-header.navbar .navbar-text {
  color: #f1f5f9 !important;
}

body.dark-mode .navbar-light .navbar-toggler {
  border-color: rgba(148, 163, 184, 0.35);
}

body.dark-mode .navbar-light .navbar-toggler-icon {
  filter: invert(90%);
}