/* ==================== NAVIGATION BAR AND FOOTER (EVERY PAGE) ==================== */

.nav-bar {
  width: 100%;
  position: sticky;
  top: 0;
  z-index: 100;
  background-color: var(--bg-section);
  border-bottom: 1px solid var(--line);
}

.nav-bar::after {
  content: "";
  z-index: 1;
  position: absolute;
  left: 0;
  right: 0;
  bottom: -1px;
  height: 2px;
  background: var(--accent-gradient);
}

.nav-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  width: 100%;
  max-width: 80rem;
  min-height: var(--nav-height);
  margin: 0 auto;
  padding: 0.5rem 1.5rem;
}

.site-brand {
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
  flex-shrink: 0;
  margin-left: -0.5rem;
  padding: 0.3rem 0.75rem 0.3rem 0.5rem;
  color: var(--text-main);
  text-decoration: none;
  border-radius: var(--button-radius);
  transition: background-color 0.15s ease;
}

.site-brand:hover,
.site-brand:focus-visible {
  text-decoration: none;
  background-color: var(--bg-subtle);
}

.site-brand .site-name {
  transition: color 0.15s ease;
}

.site-brand:hover .site-name,
.site-brand:focus-visible .site-name,
.site-brand.active .site-name {
  color: var(--primary-red);
}

.site-logo {
  width: 2.6rem;
  height: 2.6rem;
  border-radius: 50%;
  object-fit: cover;
  border: 1px solid var(--line);
}

.site-name {
  font-family: var(--font-nav-title);
  font-size: 1.55rem;
  font-weight: bold;
  letter-spacing: 0.03em;
  line-height: 1;
  white-space: nowrap;
}

.site-brand.active .site-name {
  padding: 0.45rem 0;
  box-shadow: inset 0 -2px 0 var(--primary-red);
}

.nav-links {
  list-style: none;
  display: flex;
  align-items: center;
  gap: 0.25rem;
  margin: 0 0 0 auto;
  padding: 0;
  font-family: var(--font-nav-title);
}

.nav-links > li > a,
.nav-dropdown-toggle {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.45rem 0.85rem;
  font-family: var(--font-nav-title);
  font-size: 1.2rem;
  font-weight: bold;
  letter-spacing: 0.04em;
  color: var(--text-main);
  text-decoration: none;
  white-space: nowrap;
  background: none;
  border: none;
  border-radius: var(--button-radius);
  cursor: pointer;
  transition: background-color 0.15s ease, color 0.15s ease;
}

.nav-links > li > a:hover,
.nav-dropdown-toggle:hover,
.nav-dropdown:hover .nav-dropdown-toggle,
.nav-dropdown.open .nav-dropdown-toggle {
  background-color: var(--bg-subtle);
  color: var(--link);
}

.nav-links a.active,
.nav-dropdown-toggle.active {
  color: var(--link);
}

.nav-links > li > a.active,
.nav-dropdown-toggle.active {
  text-decoration: underline;
  text-decoration-color: var(--link);
  text-decoration-thickness: 2px;
  text-underline-offset: 0.3em;
}

.nav-dropdown-toggle::after {
  content: "";
  width: 0;
  height: 0;
  border-left: 4px solid transparent;
  border-right: 4px solid transparent;
  border-top: 5px solid currentColor;
  transition: transform 0.2s ease;
}

.nav-dropdown.open .nav-dropdown-toggle::after {
  transform: rotate(180deg);
}

.nav-dropdown {
  position: relative;
}

.nav-dropdown-menu {
  display: none;
  z-index: 2;
  position: absolute;
  top: 100%;
  right: 0;
  min-width: 15rem;
  margin: 0;
  padding: 0.5rem;
  list-style: none;
  background-color: var(--bg-section);
  border: var(--border);
  border-radius: var(--main-radius);
  box-shadow: var(--box-shadow-hover);
  font-family: var(--font-main);
}

.nav-dropdown:hover .nav-dropdown-menu,
.nav-dropdown.open .nav-dropdown-menu {
  display: block;
}

.nav-dropdown-label {
  padding: 0.5rem 0.75rem 0.25rem;
  font-family: var(--font-main);
  font-size: 0.75rem;
  font-weight: bold;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-muted);
}

.nav-dropdown-label:not(:first-child) {
  margin-top: 0.35rem;
  padding-top: 0.75rem;
  border-top: 1px solid var(--line);
}

.nav-dropdown-menu a {
  display: block;
  padding: 0.45rem 0.75rem;
  font-family: var(--font-main);
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-main);
  text-decoration: none;
  border-radius: calc(var(--button-radius) - 2px);
}

.nav-dropdown-menu a:hover {
  background-color: var(--bg-subtle);
  color: var(--link);
}

.nav-controls {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  flex-shrink: 0;
}

#theme-toggle,
.nav-menu-toggle {
  flex-shrink: 0;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2.25rem;
  height: 2.25rem;
  padding: 0;
  color: var(--text-main);
  background-color: transparent;
  border: var(--border);
  border-radius: var(--button-radius);
  cursor: pointer;
  transition: background-color 0.15s ease;
}

#theme-toggle:hover,
.nav-menu-toggle:hover {
  background-color: var(--bg-subtle);
}

.nav-menu-toggle {
  display: none;
}

.theme-icon {
  width: 1.1rem;
  height: 1.1rem;
}

.theme-icon--sun {
  display: none;
}

html.dark-mode .theme-icon--sun {
  display: block;
}

html.dark-mode .theme-icon--moon {
  display: none;
}

.footer {
  margin-top: 2rem;
  background: var(--bg-section);
  border-top: 1px solid var(--line);
  width: 100%;
  font-family: var(--font-main);
  color: var(--text-main);
}

.footer-inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 1rem 2rem;
  max-width: 80rem;
  margin: 0 auto;
  padding: 1.25rem 1.5rem;
}

.footer-brand {
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
  color: var(--text-main);
  text-decoration: none;
  font-family: var(--font-nav-title);
  font-size: 1.4rem;
  font-weight: bold;
  letter-spacing: 0.03em;
  margin-left: -0.5rem;
  padding: 0.3rem 0.75rem 0.3rem 0.5rem;
  border-radius: var(--button-radius);
  transition: background-color 0.15s ease, color 0.15s ease;
}

.footer-brand:hover,
.footer-brand:focus-visible {
  color: var(--primary-red);
  background-color: var(--bg-subtle);
  text-decoration: none;
}

.footer-brand img {
  width: 2.2rem;
  height: 2.2rem;
  border-radius: 50%;
}

.footer-socials {
  display: flex;
  flex-wrap: wrap;
  gap: 0.9rem;
}

.footer-socials a {
  display: inline-flex;
  width: 2rem;
  height: 2rem;
  box-sizing: border-box;
  border-radius: 50%;
  /* shows through the transparent glyph cutouts in the icons, so glyph and outline are the opposite of the mode */
  background-color: var(--text-main);
  border: 1.5px solid var(--text-main);
  transition: transform 0.15s ease, opacity 0.15s ease;
}

.footer-socials a:hover {
  transform: translateY(-2px);
  opacity: 0.85;
}

.footer-socials img {
  width: 100%;
  height: 100%;
  border-radius: 50%;
  /* Icons are black circles with white glyphs: flip them in light mode so they match the page,
     and outline them in the opposite colour of the mode */
  filter: invert(1);
}

html.dark-mode .footer-socials img {
  filter: none;
}

.footer-legal {
  max-width: 80rem;
  margin: 0 auto;
  padding: 0.85rem 1.5rem 1.1rem;
  border-top: 1px solid var(--line);
}

.footer-legal p {
  margin: 0;
  font-size: 0.8rem;
  line-height: 1.6;
  color: var(--text-muted);
}

.footer-legal p + p {
  margin-top: 0.35rem;
}

@media (max-width: 860px) {
  .nav-menu-toggle {
    display: inline-flex;
  }

  .nav-links {
    display: none;
    z-index: 2;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    margin: 0;
    padding: 0.5rem 1rem 1rem;
    max-height: calc(100dvh - var(--nav-height));
    overflow-y: auto;
    background-color: var(--bg-section);
    border-bottom: 1px solid var(--line);
    box-shadow: var(--box-shadow-hover);
  }

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

  .nav-links > li > a,
  .nav-dropdown-toggle {
    width: 100%;
    padding: 0.65rem 0.75rem;
    font-size: 1.3rem;
  }

  /* On small screens the About links expand inline when About is tapped */

  .nav-dropdown-toggle {
    justify-content: space-between;
  }

  .nav-dropdown:hover .nav-dropdown-menu {
    display: none;
  }

  .nav-dropdown.open .nav-dropdown-menu {
    display: block;
  }

  .nav-dropdown-menu {
    position: static;
    min-width: 0;
    padding: 0 0 0 1rem;
    background: none;
    border: none;
    box-shadow: none;
  }
}

@media (max-width: 768px) {
  .nav-row {
    padding: 0.5rem 1rem;
  }

  .site-logo {
    width: 2.2rem;
    height: 2.2rem;
  }

  .site-name {
    font-size: 1.3rem;
  }
}