.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  max-width: var(--max);
  margin: 0 auto;
  padding: 1.25rem 1.5rem;
}

.nav-brand {
  font-family: "Fraunces", serif;
  font-optical-sizing: auto;
  font-weight: 700;
  font-size: 1.15rem;
  letter-spacing: -0.02em;
  color: var(--ink);
  text-decoration: none;
}

.nav-end {
  display: flex;
  align-items: center;
  gap: 1.25rem;
}

.nav-links {
  display: flex;
  gap: 1.75rem;
  list-style: none;
}

/* Przełącznik języka PL / EN — obok przełącznika motywu. */
.lang-switch {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.85rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  flex-shrink: 0;
}

.lang-switch .lang-sep {
  color: var(--ink-soft);
  opacity: 0.5;
}

.lang-switch .lang-current {
  color: var(--ink);
}

.lang-switch .lang-link {
  color: var(--ink-soft);
  text-decoration: none;
  transition: color 0.3s var(--ease);
}

.lang-switch .lang-link:hover,
.lang-switch .lang-link:focus-visible {
  color: var(--ochre);
}

.lang-switch .lang-link:focus-visible {
  outline: 2px solid var(--ink);
  outline-offset: 2px;
  border-radius: 2px;
}

/* Przełącznik jasny / ciemny — kapsuła z ikoną w gałce (księżyc | słońce). */
.theme-toggle {
  --toggle-w: 3.25rem;
  --toggle-h: 1.7rem;
  --knob: 1.35rem;
  flex-shrink: 0;
  position: relative;
  width: var(--toggle-w);
  height: var(--toggle-h);
  padding: 0;
  border: 2px solid var(--toggle-ink);
  border-radius: 999px;
  background: var(--toggle-track);
  cursor: pointer;
  appearance: none;
  -webkit-appearance: none;
  transition: border-color 0.3s var(--ease), background-color 0.3s var(--ease);
}

.theme-toggle:focus-visible {
  outline: 2px solid var(--ink);
  outline-offset: 3px;
}

.theme-toggle-knob {
  position: absolute;
  top: 50%;
  /* Tryb jasny (domyślny): gałka po prawej. */
  left: calc(100% - var(--knob) - 0.12rem);
  width: var(--knob);
  height: var(--knob);
  border-radius: 50%;
  background: var(--toggle-ink);
  transform: translateY(-50%);
  display: grid;
  place-items: center;
  transition: left 0.35s var(--ease), background-color 0.3s var(--ease);
}

.theme-toggle-knob svg {
  width: 0.72rem;
  height: 0.72rem;
  fill: var(--toggle-track);
  stroke: var(--toggle-track);
  display: block;
}

.theme-toggle-knob .icon-sun {
  display: block;
}

.theme-toggle-knob .icon-moon {
  display: none;
}

/* Tryb ciemny: gałka po lewej, ikona księżyca. */
[data-theme="dark"] .theme-toggle-knob {
  left: 0.12rem;
}

[data-theme="dark"] .theme-toggle-knob .icon-sun {
  display: none;
}

[data-theme="dark"] .theme-toggle-knob .icon-moon {
  display: block;
}

.nav-links a {
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--ink-soft);
  text-decoration: none;
  position: relative;
}

.nav-links a::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -3px;
  width: 100%;
  height: 1.5px;
  background: var(--ochre);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.35s var(--ease);
}

.nav-links a:hover::after,
.nav-links a:focus-visible::after {
  transform: scaleX(1);
}

.nav-links a:focus-visible {
  outline: 2px solid var(--ink);
  outline-offset: 2px;
  border-radius: 2px;
}

.nav-links a.nav-cta {
  background: var(--ink);
  padding: 0.5rem 1rem;
  color: var(--paper);
  border-radius: 2px;
  transition: transform 0.3s var(--ease), box-shadow 0.3s var(--ease);
}

.nav-cta:hover {
  transform: translateY(-2px);
  box-shadow: 2px 4px 0 var(--ochre-wash);
}

/* Obwódka w kolorze papieru z dodatnim offsetem lądowała poza ciemnym
   przyciskiem, na jasnym tle strony — focus był niewidoczny. */
.nav-cta:focus-visible {
  outline: 2px solid var(--ink);
  outline-offset: 2px;
}