/* Top navigation */
.nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 16px 36px;
  border-bottom: 1px solid var(--border);
  background: rgba(252, 250, 246, 0.85);
  backdrop-filter: blur(12px) saturate(1.4);
  -webkit-backdrop-filter: blur(12px) saturate(1.4);
  position: sticky;
  top: 0;
  z-index: 100;
  transition: background var(--transition-base);
}

.nav-logo {
  display: flex;
  align-items: center;
  text-decoration: none;
}

.nav-logo-img {
  height: 36px;
  width: auto;
  display: block;
  transition: opacity var(--transition-base);
}

.nav-logo:hover .nav-logo-img {
  opacity: 0.8;
}

/* Tryb ciemny — przezroczyste tło nav z blur */
[data-theme="dark"] .nav {
  background: rgba(14, 18, 24, 0.85);
}

/* Tryb ciemny — odwracamy granat na jaśniejszy */
[data-theme="dark"] .nav-logo-img {
  filter: brightness(1.4) saturate(0.9);
}

.nav-menu {
  display: flex;
  gap: 24px;
  align-items: center;
}

.nav-link {
  color: var(--text-2);
  text-decoration: none;
  font-size: 13px;
  transition: color var(--transition-base);
}
.nav-link:hover { color: var(--text); }

/* Theme toggle button */
.theme-toggle {
  background: var(--bg-2);
  border: 1px solid var(--border);
  width: 32px;
  height: 32px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-2);
  transition: all var(--transition-base);
}
.theme-toggle:hover { color: var(--text); border-color: var(--text); }
.theme-toggle svg { width: 14px; height: 14px; }
.theme-toggle .icon-moon { display: none; }
[data-theme="dark"] .theme-toggle .icon-sun { display: none; }
[data-theme="dark"] .theme-toggle .icon-moon { display: block; }

/* Mobile menu toggle */
.nav-mobile-toggle {
  display: none;
  background: transparent;
  border: 1px solid var(--border);
  width: 38px;
  height: 38px;
  cursor: pointer;
  align-items: center;
  justify-content: center;
  color: var(--text-2);
}

@media (max-width: 768px) {
  .nav {
    padding: 14px 22px;
  }

  .nav-logo-img {
    height: 32px;
  }

  .nav-mobile-toggle {
    display: flex;
  }

  .nav-menu {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--bg-2);
    border-bottom: 1px solid var(--border);
    padding: 18px 22px;
    flex-direction: column;
    align-items: stretch;
    gap: 12px;
  }

  .nav-menu.open {
    display: flex;
  }

  .nav-menu .btn {
    width: 100%;
    text-align: center;
    justify-content: center;
  }
}