:root {
  --nav-height: 3rem;
  --nav-gap: 0.8rem;
}

/* Reset */
* { box-sizing: border-box; }
html, body { margin: 0; }

/* Wrapper */
.nav-wrapper {
  position: relative;
  background: var(--bg);
  height: var(--nav-height);
  padding: 0 0.5rem;
  overflow: hidden;
}

/* Nav layout */
nav.lang,
nav.secondary {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--nav-gap);
  height: 100%;
  white-space: nowrap;
  margin: 0;
  padding: 0;
  font-size: 0.95rem;
}

/* Secondary overlay */
nav.secondary {
  position: absolute;
  inset: 0;
  background: var(--bg);
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.25s ease;
}

/* Links and toggle */
nav a,
.menu-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  height: var(--nav-height);
  padding: 0 0.6rem;
  margin: 0;
  line-height: normal;
  text-decoration: none;
  color: var(--fg);
  cursor: pointer;
}

nav a:hover,
.menu-toggle:hover {
  color: var(--gr);
}

/* Toggle button default (vertical center) */
.menu-toggle {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  z-index: 2;
}

/* Toggle button left or right depending on wrapper class */
.nav-wrapper.left-toggle-nav .menu-toggle {
  left: 0.3rem;
  right: auto;
}

.nav-wrapper.right-toggle-nav .menu-toggle {
  right: 0.3rem;
  left: auto;
}

/* Toggle behavior */
.nav-wrapper input[type="checkbox"]:checked ~ .secondary {
  opacity: 1;
  pointer-events: auto;
}

.nav-wrapper input[type="checkbox"]:checked ~ .lang {
  opacity: 0;
  pointer-events: none;
}