/*
Copyright 2026 Karl J. Obermeyer
*/

/* Global dark-mode mode switch via adding class to outer html tag */
html.dark-mode {
  -webkit-filter: invert(1);
          filter: invert(1);
}
.dark-mode img.dark-mode-immune,
.dark-mode video.dark-mode-immune {
  /* Counter-inversion for tagged images/videos */
  -webkit-filter: invert(1);
          filter: invert(1);
}

header {
  position: relative;
}

/* Common style for desktop and mobile */
.dark-mode-toggle {
  width: 26px;
  height: 26px;
  border-radius: 50%;
  background: -webkit-gradient(linear, left top, right top, color-stop(50%, #000), color-stop(50%, #fff));
  background: linear-gradient(to right, #000 50%, #fff 50%);
  cursor: pointer;
  padding: 0;
  -webkit-box-shadow: 0 2px 4px rgba(0, 0, 0, 0.15);
          box-shadow: 0 2px 4px rgba(0, 0, 0, 0.15);
  -webkit-transition: -webkit-transform 0.2s ease, -webkit-box-shadow 0.2s ease;
  transition: -webkit-transform 0.2s ease, -webkit-box-shadow 0.2s ease;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
  transition: transform 0.2s ease, box-shadow 0.2s ease, -webkit-transform 0.2s ease, -webkit-box-shadow 0.2s ease;
  z-index: 100;
}

.dark-mode-toggle:hover {
  -webkit-transform: scale(1.08);
      -ms-transform: scale(1.08);
          transform: scale(1.08);
  -webkit-box-shadow: 0 3px 6px rgba(0, 0, 0, 0.2);
          box-shadow: 0 3px 6px rgba(0, 0, 0, 0.2);
}

.dark-mode-toggle:active {
  -webkit-transform: scale(0.92);
      -ms-transform: scale(0.92);
          transform: scale(0.92);
}

.dark-mode-toggle:focus-visible {
  outline: 2px solid #4a90e2;
  outline-offset: 2px;
}

.dark-mode-toggle.desktop-toggle {
  border: 2px solid black;
  position: absolute;
  top: 2px;
  right: 2px;
}

.dark-mode-toggle.mobile-toggle {
  border: 2px solid white;
  margin-right: 7px;
  margin-bottom: 3px;
  position: static;
  width: 24px;
  height: 24px;
  -webkit-box-shadow: 0 1px 3px rgba(0, 0, 0, 0.15);
          box-shadow: 0 1px 3px rgba(0, 0, 0, 0.15);
}

/* Mobile */
@media (max-width: 759px) {
  #hamburger-rule {
    display: -webkit-box;
    display: -ms-flexbox;
    display: flex;
    -webkit-box-align: center;
        -ms-flex-align: center;
            align-items: center;
    -webkit-box-pack: justify;
        -ms-flex-pack: justify;
            justify-content: space-between;
    width: 100%;
  }
  .dark-mode-toggle.desktop-toggle {
    display: none;
  }
  .dark-mode-toggle.mobile-toggle {
    display: inline-block;
  }
}

/* Desktop */
@media (min-width: 760px) {
  .dark-mode-toggle.desktop-toggle {
    display: block;
  }
  .dark-mode-toggle.mobile-toggle {
    display: none;
  }
}