.navbar {
  position: fixed;
  inset: 0 0 auto;
  z-index: 900;
  height: var(--header-height);
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(245, 246, 250, 0.78);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border-bottom: 1px solid rgba(23, 26, 36, 0.08);
  transition: background 0.3s var(--ease), box-shadow 0.3s var(--ease),
              border-color 0.3s var(--ease);
}

.navbar.is-scrolled {
  background: rgba(245, 246, 250, 0.94);
  border-bottom-color: var(--border);
  box-shadow: 0 8px 28px rgba(23, 26, 36, 0.07);
}

.navbar-inner {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto minmax(0, 1fr);
  grid-template-areas: "theme nav right";
  align-items: center;
  width: 100%;
  min-width: 0;
  max-width: var(--container-max);
  padding-inline: var(--page-gutter);
  padding-block: 0;
  gap: clamp(6px, 1.8vw, 16px);
  direction: ltr;
}

.navbar-theme-toggle {
  --toggle-width: clamp(48px, 12vw, 84px);
  --toggle-height: clamp(24px, 4vw, 34px);
  
  --toggle-thumb: calc(var(--toggle-height) - 2px);
  --toggle-inset: 0px;
  --toggle-shift: calc(var(--toggle-width) - var(--toggle-thumb) - 2px);
  position: relative;
  grid-area: theme;
  justify-self: start;
  display: inline-grid;
  place-items: center;
  width: calc(var(--toggle-width) + 4px);
  height: calc(var(--toggle-height) + 10px);
  padding: 2px;
  direction: ltr;
  color: var(--accent-strong);
  background: transparent;
  border: 0;
  border-radius: var(--radius-pill);
  cursor: pointer;
  transition: transform 0.25s var(--ease), color 0.25s var(--ease);
}

.theme-toggle-track {
  position: relative;
  display: block;
  width: var(--toggle-width);
  height: var(--toggle-height);
  overflow: hidden;
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-pill);
  background: color-mix(in srgb, var(--surface) 88%, var(--accent-tint));
  box-shadow: inset 0 1px 0 color-mix(in srgb, var(--surface) 82%, transparent),
              var(--shadow-sm);
  transition: background 0.3s var(--ease), border-color 0.25s var(--ease),
              box-shadow 0.25s var(--ease);
}

.theme-toggle-thumb {
  position: absolute;
  top: var(--toggle-inset);
  left: var(--toggle-inset);
  z-index: 1;
  display: grid;
  place-items: center;
  width: var(--toggle-thumb);
  height: var(--toggle-thumb);
  border-radius: 50%;
  background: var(--surface);
  color: var(--accent-strong);
  box-shadow: none;
  transition: transform 0.35s var(--ease), background 0.3s var(--ease),
              color 0.25s var(--ease);
}

.theme-toggle-label {
  position: absolute;
  top: 50%;
  right: 12px;
  transform: translateY(-50%);
  font-family: var(--font-sans);
  font-size: 12px;
  font-weight: 600;
  line-height: 1;
  color: var(--text);
  white-space: nowrap;
  pointer-events: none;
  transition: color 0.25s var(--ease);
}

.theme-toggle-icon {
  position: absolute;
  width: 22px;
  height: 22px;
  object-fit: contain;
  opacity: 0;
  transform: scale(0.65) rotate(-18deg);
  transition: opacity 0.22s var(--ease), transform 0.35s var(--ease);
}

.theme-toggle-icon--sun {
  width: 18px;
  height: 18px;
  opacity: 1;
  transform: scale(1) rotate(0);
}

.navbar-theme-toggle[data-mode="dark"] .theme-toggle-thumb {
  transform: translateX(var(--toggle-shift));
  background: #000;
  border: 2px solid #fff;
}

.navbar-theme-toggle[data-mode="dark"] .theme-toggle-label {
  right: auto;
  left: 12px;
}

.navbar-theme-toggle[data-mode="dark"] .theme-toggle-icon--sun {
  opacity: 0;
  transform: scale(0.65) rotate(18deg);
}

.navbar-theme-toggle[data-mode="dark"] .theme-toggle-icon--moon {
  opacity: 1;
  transform: scale(1) rotate(0);
  filter: brightness(0) invert(1);
}

.navbar-theme-toggle:focus-visible .theme-toggle-track {
  border-color: var(--accent);
  background: color-mix(in srgb, var(--accent-tint) 76%, var(--surface));
  box-shadow: 0 7px 16px color-mix(in srgb, var(--accent) 16%, transparent),
              inset 0 1px 0 color-mix(in srgb, var(--surface) 82%, transparent);
}

.navbar-theme-toggle:focus {
  outline: none;
}

.navbar-theme-toggle:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
  box-shadow: none;
}

.navbar-theme-toggle:active {
  transform: translateY(1px) scale(0.96);
}

.navbar-nav {
  grid-area: nav;
  justify-self: center;
  display: flex;
  align-items: center;
  padding: 4px;
  direction: rtl;
  background: rgba(255, 255, 255, 0.46);
  border: 1px solid var(--border);
  border-radius: var(--radius-pill);
  box-shadow: 0 2px 8px rgba(23, 26, 36, 0.035);
}

.navbar-links {
  display: flex;
  align-items: center;
  gap: 2px;
  list-style: none;
}

.navbar-link {
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 35px;
  white-space: nowrap;
  padding: 6px clamp(10px, 1.6vw, 16px);
  color: var(--text-muted);
  font-size: 0.87rem;
  font-weight: 400;
  border-radius: var(--radius-pill);
  transition: color 0.2s var(--ease), background 0.2s var(--ease),
              box-shadow 0.2s var(--ease);
}

.navbar-link::after {
  content: "";
  position: absolute;
  right: 16px;
  bottom: 4px;
  left: 16px;
  height: 2px;
  background: var(--accent);
  border-radius: 2px;
  transform: scaleX(0);
  transform-origin: right;
  transition: transform 0.3s var(--ease);
}

.navbar-link:hover,
.navbar-link:focus-visible {
  color: var(--text);
  background: var(--accent-tint);
}

.navbar-link:focus-visible::after,
.navbar-link.is-active::after {
  transform: scaleX(1);
}

.navbar-link.is-active {
  color: var(--text);
  font-weight: 500;
  background: rgba(255, 255, 255, 0.72);
  box-shadow: 0 1px 4px rgba(23, 26, 36, 0.05);
}

.navbar-link-icon {
  display: none;
  flex: none;
  width: 20px;
  height: 20px;
}

.navbar-link-text {
  display: inline;
}

.navbar-right {
  grid-area: right;
  justify-self: end;
  display: flex;
  align-items: center;
  gap: clamp(6px, 2vw, 24px);
  min-width: 0;
  direction: ltr;
}

.navbar-socials {
  display: flex;
  align-items: center;
  gap: clamp(2px, 0.8vw, 4px);
  padding: clamp(3px, 0.8vw, 4px) clamp(4px, 1.2vw, 6px);
  direction: ltr;
  background: rgba(255, 255, 255, 0.46);
  border: 1px solid var(--border);
  border-radius: var(--radius-pill);
  box-shadow: 0 2px 8px rgba(23, 26, 36, 0.035);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
}

@supports not (backdrop-filter: blur(1px)) {
  .navbar,
  .navbar-socials {
    background: var(--surface);
    background-color: var(--surface);
  }
}

.navbar-social {
  position: relative;
  display: inline-grid;
  place-items: center;
  width: clamp(28px, 7.5vw, 40px);
  height: clamp(28px, 7.5vw, 40px);
  padding: clamp(6px, 1.5vw, 8px);
  border: 0;
  border-radius: 50%;
  background: transparent;
  box-shadow: none;
  transition: transform 0.25s var(--ease), background 0.25s var(--ease),
              box-shadow 0.25s var(--ease);
}

.navbar-social img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: contain;
  transition: transform 0.3s var(--ease);
}

.navbar-social:hover img,
.navbar-social:focus-visible img {
  transform: scale(1.1);
}

.navbar-social:active {
  transform: scale(0.94);
}

@media (max-width: 900px) {
  .theme-toggle-label {
    display: none;
  }

  .navbar-link-icon {
    display: block;
    width: clamp(16px, 4.6vw, 20px);
    height: clamp(16px, 4.6vw, 20px);
  }

  .navbar-link-text {
    display: none;
  }

  .navbar-link {
    width: clamp(28px, 8.5vw, 40px);
    min-height: clamp(28px, 8.5vw, 40px);
    padding: clamp(6px, 2vw, 10px);
  }

  .navbar-link::after {
    display: none;
  }
}

@media (max-width: 600px) {
  .navbar-inner {
    padding-inline: max(clamp(10px, 3.5vw, 16px), env(safe-area-inset-left)) max(clamp(10px, 3.5vw, 16px), env(safe-area-inset-right));
  }
}

@media (max-width: 360px) {
  .navbar-inner {
    gap: 4px;
  }

  .navbar-nav {
    padding: 2px;
  }

  .navbar-links {
    gap: 0;
  }

  .navbar-link {
    width: 36px;
    min-height: 36px;
    padding: 8px;
  }

  .navbar-socials {
    gap: 1px;
    padding-inline: 4px;
  }

  .navbar-social {
    width: 24px;
    height: 24px;
    padding: 4px;
  }
}

/* Navbar transitions and hover motion stay active even when the device has
   animations turned off (prefers-reduced-motion) — see base.css note. */