/* ============================================================
   橙照 · 导航
   ============================================================ */

.navbar {
  --bs-navbar-padding-y: 0;
  --bs-navbar-padding-x: 0;
  position: sticky !important;
  top: 0;
  z-index: 1030;
  min-height: var(--cz-nav-height);
  padding: 0 !important;
  border: 0;
  background: color-mix(in srgb, var(--cz-bg) 82%, transparent) !important;
  box-shadow: 0 1px 0 var(--cz-line);
  backdrop-filter: blur(18px) saturate(140%);
  -webkit-backdrop-filter: blur(18px) saturate(140%);
  transition: box-shadow 200ms var(--cz-ease), background 200ms var(--cz-ease);
}

.navbar.cz-nav-scrolled {
  background: color-mix(in srgb, var(--cz-bg) 92%, transparent) !important;
  box-shadow: 0 1px 0 var(--cz-line), 0 12px 34px rgba(53, 35, 17, 0.07);
}

html[data-theme="dark"] .navbar.cz-nav-scrolled {
  box-shadow: 0 1px 0 var(--cz-line), 0 14px 36px rgba(0, 0, 0, 0.32);
}

.navbar > .navbar-container,
.navbar > .container-fluid {
  width: 100%;
  max-width: var(--cz-container);
  min-height: var(--cz-nav-height);
  margin-inline: auto;
  padding-inline: 1.4rem;
  display: flex;
  align-items: center;
  gap: 1.4rem;
}

.navbar-brand-container {
  margin-right: auto;
  flex: 0 0 auto;
}

.navbar-brand {
  display: inline-flex;
  align-items: center;
  gap: 0.65rem;
  padding: 0;
  color: var(--cz-ink) !important;
  font-family: var(--cz-font-display);
  font-size: 1.08rem;
  font-weight: 580;
  letter-spacing: 0.015em;
  text-decoration: none;
  transition: opacity 180ms var(--cz-ease);
}

.navbar-brand:hover {
  opacity: 0.72;
}

.navbar-brand img,
.navbar-brand .logo {
  width: auto;
  height: 34px;
}

.navbar-title {
  display: inline-block;
  white-space: nowrap;
}

#quarto-navbar-tools {
  display: none;
}

.navbar-collapse {
  display: flex;
  flex: 1 1 auto;
  align-items: center;
  justify-content: flex-end;
  gap: 1.2rem;
}

.navbar-nav {
  align-items: center;
  gap: 0.15rem;
}

.navbar-nav .nav-link {
  position: relative;
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.46rem 0.82rem !important;
  border-radius: 999px;
  color: var(--cz-ink-2) !important;
  font-family: var(--cz-font-body);
  font-size: 0.88rem;
  font-weight: 500;
  letter-spacing: 0.01em;
  text-decoration: none;
  transition: color 180ms var(--cz-ease), background 180ms var(--cz-ease);
}

.navbar-nav .nav-link:hover,
.navbar-nav .nav-link:focus-visible {
  background: color-mix(in srgb, var(--cz-ink) 6%, transparent);
  color: var(--cz-ink) !important;
}

.navbar-nav .nav-link.active,
.navbar-nav .nav-link[aria-current="page"] {
  background: var(--cz-accent-soft);
  color: var(--cz-accent-strong) !important;
}

.navbar-nav .nav-link.active::after,
.navbar-nav .nav-link[aria-current="page"]::after {
  content: "";
  position: absolute;
  left: 50%;
  bottom: 0.16rem;
  width: 3px;
  height: 3px;
  border-radius: 50%;
  background: var(--cz-accent);
  transform: translateX(-50%);
}

.navbar-nav .nav-link.external::after,
.navbar-nav .nav-link.quarto-navigation-tool::after {
  display: none;
}

/* 右侧工具：搜索与主题切换 */

.navbar .navbar-nav.navbar-right {
  margin-left: 0.35rem;
}

.quarto-navbar-tools {
  display: flex;
  align-items: center;
  gap: 0.35rem;
  margin-left: 0.15rem;
}

/* Quarto 自带切换器没有图标，改用站点的按钮，只保留一个主题入口。 */
.quarto-color-scheme-toggle {
  display: none !important;
}

.quarto-navbar-tools .cz-theme-toggle {
  margin: 0;
  flex: 0 0 auto;
}

.navbar .aa-DetachedSearchButton {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 38px;
  height: 38px;
  padding: 0;
  border: 1px solid transparent;
  border-radius: 50%;
  background: transparent;
  color: var(--cz-ink-2);
  transition: color 180ms var(--cz-ease), background 180ms var(--cz-ease), border-color 180ms var(--cz-ease);
}

.navbar .aa-DetachedSearchButton:hover {
  border-color: var(--cz-line);
  background: color-mix(in srgb, var(--cz-ink) 5%, transparent);
  color: var(--cz-ink);
}

.navbar .aa-DetachedSearchButtonIcon {
  color: currentColor;
}

.navbar .aa-DetachedSearchButtonPlaceholder {
  display: none;
}

.cz-theme-item {
  display: flex;
  align-items: center;
  margin-left: 0.15rem;
}

.cz-theme-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 38px;
  height: 38px;
  padding: 0 !important;
  border: 1px solid var(--cz-line);
  border-radius: 50%;
  background: var(--cz-surface);
  color: var(--cz-ink-2) !important;
  cursor: pointer;
  transition: transform 220ms var(--cz-ease), border-color 180ms var(--cz-ease), color 180ms var(--cz-ease), background 180ms var(--cz-ease);
}

.cz-theme-toggle:hover {
  transform: rotate(-18deg);
  border-color: var(--cz-accent);
  background: var(--cz-accent-soft);
  color: var(--cz-accent-strong) !important;
}

.cz-theme-toggle svg {
  display: block;
}

.cz-theme-toggle [hidden] {
  display: none !important;
}

/* 移动端折叠按钮 */

.navbar-toggler {
  position: relative;
  width: 42px;
  height: 40px;
  padding: 0;
  border: 1px solid var(--cz-line);
  border-radius: 12px;
  background: var(--cz-surface);
  color: var(--cz-ink);
  box-shadow: none !important;
}

.navbar-toggler-icon {
  display: none;
}

.navbar-toggler::before,
.navbar-toggler::after {
  content: "";
  position: absolute;
  left: 11px;
  width: 18px;
  height: 1.5px;
  border-radius: 2px;
  background: currentColor;
  transition: transform 220ms var(--cz-ease), top 220ms var(--cz-ease);
}

.navbar-toggler::before {
  top: 15px;
}

.navbar-toggler::after {
  top: 23px;
}

.navbar-toggler[aria-expanded="true"]::before {
  top: 19px;
  transform: rotate(45deg);
}

.navbar-toggler[aria-expanded="true"]::after {
  top: 19px;
  transform: rotate(-45deg);
}

@media (max-width: 991.98px) {
  :root {
    --cz-nav-height: 64px;
  }

  .navbar > .navbar-container,
  .navbar > .container-fluid {
    padding-inline: 1rem;
    gap: 0.75rem;
  }

  .navbar .navbar-brand-container {
    order: 1;
    margin-left: 0 !important;
    margin-right: auto !important;
  }

  .navbar .quarto-navbar-tools {
    order: 2;
    margin-left: auto;
    margin-right: 0;
  }

  .navbar #quarto-search {
    order: 3;
    margin-left: 0 !important;
    margin-right: 0;
  }

  .navbar .navbar-toggler {
    order: 4;
    flex: 0 0 42px;
    margin: 0;
  }

  .navbar-brand img,
  .navbar-brand .logo {
    height: 30px;
  }

  .navbar-collapse {
    position: absolute;
    top: calc(100% + 0.5rem);
    left: 1rem;
    right: 1rem;
    display: none;
    flex-direction: column;
    align-items: stretch;
    gap: 0.75rem;
    max-height: calc(100vh - var(--cz-nav-height) - 1.5rem);
    padding: 0.85rem;
    overflow-y: auto;
    border: 1px solid var(--cz-line);
    border-radius: var(--cz-radius);
    background: var(--cz-surface-solid);
    box-shadow: var(--cz-shadow);
    backdrop-filter: blur(18px);
  }

  .navbar-collapse.show,
  .navbar-collapse.collapsing {
    display: flex;
  }

  .navbar-collapse.collapsing {
    height: auto !important;
    transition: none;
  }

  .navbar-nav {
    width: 100%;
    align-items: stretch;
    gap: 0.15rem;
  }

  .navbar-nav .nav-link {
    width: 100%;
    justify-content: space-between;
    padding: 0.7rem 0.85rem !important;
    border-radius: 10px;
  }

  .navbar-nav .nav-link.active::after,
  .navbar-nav .nav-link[aria-current="page"]::after {
    display: none;
  }

  .navbar-nav.navbar-right {
    flex-direction: row;
    justify-content: flex-end;
    margin-top: 0.35rem;
    padding-top: 0.75rem;
    border-top: 1px solid var(--cz-line);
  }

  .cz-theme-item {
    margin-left: 0;
  }

  .navbar .aa-DetachedSearchButton {
    border-color: var(--cz-line);
  }
}