:root {
  color-scheme: dark;
  --page-background: #161a20;
  --text-color: #dededb;
  --heading-color: #f5f2eb;
  --muted-color: #a9b1bb;
  --link-color: #91c7eb;
  --link-hover-color: #f0b89b;
  --surface-color: #232b35;
  --surface-hover-color: #303d4b;
  --border-color: #414d5c;
  --icon-filter: invert(1);
  background-color: var(--page-background);
}

:root[data-theme="light"] {
  color-scheme: light;
  --page-background: #fff;
  --text-color: #222;
  --heading-color: #000;
  --muted-color: #626b75;
  --link-color: #0f73aa;
  --link-hover-color: #c0392b;
  --surface-color: #f2f2f2;
  --surface-hover-color: #ebebeb;
  --border-color: #cbd1d7;
  --icon-filter: none;
}

body {
  background-color: var(--page-background);
  color: var(--text-color);
}

.theme-toggle {
  position: absolute;
  top: 16px;
  right: 16px;
  z-index: 1;
  display: grid;
  place-items: center;
  box-sizing: border-box;
  width: 44px;
  height: 44px;
  padding: 0;
  border: 1px solid var(--border-color);
  border-radius: 50%;
  background-color: var(--surface-color);
  color: var(--heading-color);
  cursor: pointer;
  transition: background-color .15s linear, border-color .15s linear;
}

.theme-toggle[hidden], .theme-icon-moon {
  display: none;
}

.theme-toggle:hover {
  border-color: var(--link-color);
  background-color: var(--surface-hover-color);
}

.theme-toggle:focus-visible, a:focus-visible {
  outline: 2px solid var(--link-color);
  outline-offset: 4px;
}

:root[data-theme="light"] .theme-icon-sun {
  display: none;
}

:root[data-theme="light"] .theme-icon-moon {
  display: block;
}