/* Hide scrollbars globally; scrolling still works */
*,
*::before,
*::after {
  scrollbar-width: none;
  -ms-overflow-style: none;
}
*::-webkit-scrollbar {
  width: 0;
  height: 0;
  display: none;
}

/* Global page loader */
:root {
  --loader-a: var(--accent, #b4f23c);
  --loader-b: var(--accent-2, #3de8d4);
}

body.is-loading {
  /* Keep layout scrollable until the deferred loader actually appears. */
}
body.is-loader-blocking {
  overflow: hidden;
}

.page-loader {
  position: fixed;
  inset: 0;
  z-index: 9999;
  display: grid;
  place-items: center;
  background:
    radial-gradient(ellipse 70% 50% at 50% 40%, color-mix(in srgb, var(--loader-a) 8%, transparent), transparent 60%),
    var(--bg);
  transition: opacity 0.28s ease, visibility 0.28s ease;
}
.page-loader.is-deferred {
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
}
.page-loader.is-visible {
  opacity: 1;
  visibility: visible;
}

.page-loader.is-done {
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
}

.visually-hidden {
  position: absolute !important;
  width: 1px !important;
  height: 1px !important;
  padding: 0 !important;
  margin: -1px !important;
  overflow: hidden !important;
  clip: rect(0, 0, 0, 0) !important;
  white-space: nowrap !important;
  border: 0 !important;
}

.page-loader-inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1rem;
  text-align: center;
  padding: 1.5rem;
}

.page-loader-ring {
  width: 56px;
  height: 56px;
  border-radius: 50%;
  border: 2px solid rgba(238, 242, 247, 0.12);
  border-top-color: var(--loader-a);
  border-right-color: var(--loader-b);
  animation: loaderSpin 0.85s linear infinite;
  box-shadow: 0 0 28px color-mix(in srgb, var(--loader-a) 28%, transparent);
}

.page-loader-brand {
  margin: 0;
  font-family: var(--font-display, "Segoe UI", "PingFang SC", "Microsoft YaHei", system-ui, sans-serif);
  font-weight: 800;
  font-size: 1.35rem;
  letter-spacing: -0.03em;
  background: linear-gradient(115deg, var(--brand-grad-start, #fff) 12%, var(--loader-a) 48%, var(--loader-b) 92%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.page-loader-text {
  margin: 0;
  font-size: 0.8rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--muted, #8b96a5);
  animation: loaderPulse 1.4s ease-in-out infinite;
}

@keyframes loaderSpin {
  to { transform: rotate(360deg); }
}

@keyframes loaderPulse {
  0%, 100% { opacity: 0.45; }
  50% { opacity: 1; }
}

/* Mobile nav toggle + left fullscreen menu */
.nav-toggle {
  display: none;
  flex: 0 0 auto;
  box-sizing: border-box;
  width: var(--nav-ctrl, 2.35rem);
  height: var(--nav-ctrl, 2.35rem);
  margin-left: 0.35rem;
  padding: 0;
  border: 1px solid var(--line, rgba(238, 242, 247, 0.08));
  border-radius: 10px;
  background: var(--fill, rgba(255, 255, 255, 0.04));
  cursor: pointer;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 4px;
}
.nav-toggle span {
  display: block;
  width: 1rem;
  height: 1.5px;
  border-radius: 2px;
  background: var(--ink, #eef2f7);
  transition: transform 0.28s ease, opacity 0.2s ease;
}
.nav-toggle.is-open span:nth-child(1) {
  transform: translateY(5.5px) rotate(45deg);
}
.nav-toggle.is-open span:nth-child(2) {
  opacity: 0;
}
.nav-toggle.is-open span:nth-child(3) {
  transform: translateY(-5.5px) rotate(-45deg);
}

/* Title search in topbar */
.search-slot {
  display: flex;
  align-items: center;
  gap: 0.35rem;
  flex: 0 0 auto;
  min-width: 0;
}
.search-toggle {
  flex: 0 0 auto;
  box-sizing: border-box;
  width: var(--nav-ctrl, 2.35rem);
  height: var(--nav-ctrl, 2.35rem);
  padding: 0;
  border: 1px solid var(--line, rgba(238, 242, 247, 0.08));
  border-radius: 10px;
  background: var(--fill, rgba(255, 255, 255, 0.04));
  color: var(--muted, #8b96a5);
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  transition:
    color 0.2s,
    border-color 0.2s,
    background 0.2s,
    opacity 0.22s ease,
    transform 0.28s cubic-bezier(0.22, 1, 0.36, 1),
    width 0.28s cubic-bezier(0.22, 1, 0.36, 1),
    margin 0.28s ease,
    border-width 0.2s ease;
}
.search-toggle:hover {
  color: var(--ink, #eef2f7);
  border-color: color-mix(in srgb, var(--lemon, var(--lime, #3de8d4)) 45%, transparent);
  background: color-mix(in srgb, var(--lemon, var(--lime, #3de8d4)) 12%, transparent);
}
.topbar.is-search-open .search-toggle {
  width: 0;
  margin: 0;
  opacity: 0;
  transform: scale(0.72);
  border-width: 0;
  pointer-events: none;
}
.search-panel {
  display: flex;
  align-items: center;
  gap: 0.3rem;
  min-width: 0;
  max-width: 0;
  opacity: 0;
  overflow: hidden;
  pointer-events: none;
  transform: translateX(12px) scaleX(0.96);
  transform-origin: right center;
  transition:
    max-width 0.34s cubic-bezier(0.22, 1, 0.36, 1),
    opacity 0.24s ease,
    transform 0.34s cubic-bezier(0.22, 1, 0.36, 1);
}
.topbar.is-search-open .search-panel {
  max-width: 19.5rem;
  opacity: 1;
  pointer-events: auto;
  transform: translateX(0) scaleX(1);
}
.search-input {
  flex: 1 1 auto;
  box-sizing: border-box;
  min-width: 11rem;
  width: 100%;
  height: var(--nav-ctrl, 2.35rem);
  padding: 0 0.85rem;
  border-radius: 10px;
  border: 1px solid var(--line, rgba(238, 242, 247, 0.08));
  background: transparent;
  color: var(--ink, #eef2f7);
  font: inherit;
  font-size: 0.85rem;
  outline: none;
  transition: border-color 0.2s, box-shadow 0.25s ease, background 0.2s;
}
.search-input::placeholder {
  color: var(--muted, #8b96a5);
}
.search-input::-webkit-search-decoration,
.search-input::-webkit-search-cancel-button {
  -webkit-appearance: none;
  appearance: none;
}
.search-input:focus {
  border-color: var(--line, rgba(238, 242, 247, 0.08));
  background: transparent;
  box-shadow: none;
}
.search-close {
  flex: 0 0 auto;
  box-sizing: border-box;
  width: var(--nav-ctrl, 2.35rem);
  height: var(--nav-ctrl, 2.35rem);
  padding: 0;
  border: 1px solid var(--line, rgba(238, 242, 247, 0.08));
  border-radius: 10px;
  background: var(--fill, rgba(255, 255, 255, 0.04));
  color: var(--muted, #8b96a5);
  font: inherit;
  font-size: 1.25rem;
  line-height: 1;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  transition: color 0.2s, border-color 0.2s, background 0.2s;
}
.search-close:hover,
.search-close:focus-visible {
  color: var(--ink, #eef2f7);
  border-color: color-mix(in srgb, var(--lemon, var(--lime, #3de8d4)) 45%, transparent);
  background: color-mix(in srgb, var(--lemon, var(--lime, #3de8d4)) 12%, transparent);
  outline: none;
}
.is-search-hidden {
  display: none !important;
}
.search-empty {
  margin: 2.5rem auto;
  text-align: center;
  color: var(--muted, #8b96a5);
  font-size: 0.95rem;
}
.top-cluster {
  display: flex;
  align-items: center;
  gap: 0.35rem;
  margin-left: auto;
  min-width: 0;
}

.site-menu {
  position: fixed;
  inset: 0;
  z-index: 120;
  display: none;
  pointer-events: none;
}
.site-menu.is-ready {
  display: block;
}
.site-menu-backdrop {
  position: absolute;
  inset: 0;
  background: var(--modal-backdrop, rgba(4, 8, 14, 0.55));
  opacity: 0;
  transition: opacity 0.3s ease;
}
.site-menu-panel {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  display: flex;
  flex-direction: column;
  background:
    radial-gradient(ellipse 70% 40% at 12% -4%, color-mix(in srgb, var(--lemon, #3ecfcf) 16%, transparent), transparent 55%),
    var(--bg, #080b10);
  transform: translateX(100%);
  transition: transform 0.34s cubic-bezier(0.22, 1, 0.36, 1);
  padding: max(0.85rem, env(safe-area-inset-top)) 1.25rem max(1.5rem, env(safe-area-inset-bottom));
}
.site-menu.is-open {
  pointer-events: auto;
}
.site-menu.is-open .site-menu-backdrop {
  opacity: 1;
}
.site-menu.is-open .site-menu-panel {
  transform: translateX(0);
}
.site-menu-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 2rem;
}
.site-menu-brand {
  font-family: var(--font-display, "Segoe UI", "PingFang SC", "Microsoft YaHei", system-ui, sans-serif);
  font-weight: 700;
  font-size: 1.05rem;
  letter-spacing: -0.02em;
  display: flex;
  align-items: center;
  gap: 0.4rem;
  line-height: 1.25;
  color: var(--ink, #eef2f7);
}
.site-menu-brand::before {
  content: "";
  width: 7px;
  height: 7px;
  flex: 0 0 auto;
  border-radius: 50%;
  background: var(--muted, #8b96a5);
  box-shadow: none;
  opacity: 0.85;
}
.site-menu-brand .brand-text {
  color: inherit;
  background: none;
  -webkit-background-clip: unset;
  background-clip: unset;
}
.site-menu-close {
  width: 2.35rem;
  height: 2.35rem;
  border-radius: 10px;
  border: 1px solid var(--line, rgba(238, 242, 247, 0.08));
  background: var(--fill, rgba(255, 255, 255, 0.04));
  color: var(--ink, #eef2f7);
  font-size: 1.25rem;
  line-height: 1;
  cursor: pointer;
}
.site-menu-nav {
  display: flex;
  flex-direction: column;
  gap: 0.55rem;
  flex: 1;
}
.site-menu-nav a {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1rem 1.1rem;
  border-radius: 14px;
  border: 1px solid var(--line, rgba(238, 242, 247, 0.08));
  background: var(--fill, rgba(255, 255, 255, 0.03));
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--ink, #eef2f7);
  text-decoration: none;
  transition: border-color 0.2s, background 0.2s, color 0.2s;
}
.site-menu-nav a::after {
  content: "→";
  color: var(--lemon, #3ecfcf);
  opacity: 0.7;
}
.site-menu-nav a.is-active,
.site-menu-nav a:hover {
  border-color: color-mix(in srgb, var(--lemon, #3ecfcf) 45%, transparent);
  background: color-mix(in srgb, var(--lemon, #3ecfcf) 12%, transparent);
}
.site-menu-theme {
  margin-top: auto;
  padding-top: 1.25rem;
}
.site-menu-theme-btn {
  width: 100%;
  display: flex;
  align-items: center;
  gap: 0.85rem;
  padding: 1rem 1.1rem;
  border-radius: 14px;
  border: 1px solid var(--line, rgba(238, 242, 247, 0.08));
  background: var(--fill, rgba(255, 255, 255, 0.03));
  color: var(--ink, #eef2f7);
  font: inherit;
  font-size: 1.05rem;
  font-weight: 600;
  cursor: pointer;
  text-align: left;
  transition: border-color 0.2s, background 0.2s;
}
.site-menu-theme-btn:hover,
.site-menu-theme-btn:focus-visible {
  border-color: color-mix(in srgb, var(--lemon, #3ecfcf) 45%, transparent);
  background: color-mix(in srgb, var(--lemon, #3ecfcf) 12%, transparent);
}
.site-menu-theme-icons {
  width: 2.1rem;
  height: 2.1rem;
  border-radius: 10px;
  display: grid;
  place-items: center;
  background: color-mix(in srgb, var(--lemon, #3ecfcf) 14%, transparent);
  flex: 0 0 auto;
}
.site-menu-theme-icons svg {
  width: 1.15rem;
  height: 1.15rem;
  fill: currentColor;
}
.site-menu-theme-btn .icon-sun { display: block; }
.site-menu-theme-btn .icon-moon { display: none; }
[data-theme="light"] .site-menu-theme-btn .icon-sun { display: none; }
[data-theme="light"] .site-menu-theme-btn .icon-moon { display: block; }
.site-menu-theme-text {
  flex: 1 1 auto;
}
body.is-site-menu-open {
  overflow: hidden;
}

@media (max-width: 640px) {
  .topbar {
    position: sticky;
    flex-wrap: nowrap;
    align-items: center;
    gap: 0.5rem;
    min-height: var(--topbar-h);
    padding: 0.4rem 0.7rem;
  }
  .top-meta {
    display: none !important;
  }
  .brand-mark {
    flex: 0 0 auto;
    max-width: none;
    min-height: var(--nav-ctrl, 2.35rem);
    font-size: 0.95rem;
    gap: 0.35rem;
    padding: 0 0.3rem 0 0.12rem;
    margin-left: -0.12rem;
    white-space: nowrap;
    overflow: visible;
    opacity: 1;
    transition: opacity 0.22s ease, visibility 0.22s, color 0.2s ease, background 0.2s ease;
  }
  .brand-mark .brand-text {
    overflow: visible;
    text-overflow: clip;
  }
  .brand-mark .dot {
    width: 6px;
    height: 6px;
    flex: 0 0 auto;
  }
  .top-nav {
    display: none !important;
  }
  .top-cluster {
    display: none;
  }
  .topbar-actions {
    margin-left: auto;
    gap: 0.4rem;
    flex: 0 0 auto;
  }
  .search-slot {
    margin-left: 0;
    gap: 0;
  }
  .search-toggle,
  .nav-toggle {
    --ctrl: 2.5rem;
    box-sizing: border-box;
    width: var(--ctrl);
    height: var(--ctrl);
    margin: 0;
    padding: 0;
    border-radius: 12px;
    border: 1px solid var(--line, rgba(238, 242, 247, 0.1));
    background: var(--fill, rgba(255, 255, 255, 0.05));
    color: var(--muted, #8b96a5);
    box-shadow: none;
    backdrop-filter: none;
    -webkit-backdrop-filter: none;
    -webkit-tap-highlight-color: transparent;
    transition: color 0.18s ease, border-color 0.18s ease, background 0.18s ease;
  }
  .search-toggle:hover,
  .search-toggle:focus-visible,
  .nav-toggle:hover,
  .nav-toggle:focus-visible {
    color: var(--ink, #eef2f7);
    border-color: color-mix(in srgb, var(--lemon, var(--lime, #3de8d4)) 40%, transparent);
    background: color-mix(in srgb, var(--lemon, var(--lime, #3de8d4)) 12%, transparent);
    outline: none;
  }
  .search-toggle:active,
  .nav-toggle:active {
    background: color-mix(in srgb, var(--lemon, var(--lime, #3de8d4)) 18%, transparent);
  }
  .search-toggle svg {
    width: 1.1rem;
    height: 1.1rem;
  }
  .nav-toggle {
    display: inline-flex;
    position: relative;
    z-index: 3;
    gap: 4.5px;
  }
  .nav-toggle span {
    width: 1.05rem;
    height: 1.5px;
  }
  .nav-toggle.is-open span:nth-child(1) {
    transform: translateY(6px) rotate(45deg);
  }
  .nav-toggle.is-open span:nth-child(3) {
    transform: translateY(-6px) rotate(-45deg);
  }
  .topbar.is-search-open .brand-mark {
    visibility: hidden;
    opacity: 0;
    pointer-events: none;
  }
  .topbar.is-search-open .topbar-actions {
    position: absolute;
    inset: 0;
    z-index: 4;
    margin: 0;
    padding: 0 0.7rem;
    width: auto;
    display: flex;
    align-items: center;
    gap: 0.4rem;
    background: var(--surface, transparent);
  }
  .topbar.is-search-open .search-slot {
    position: static;
    flex: 1 1 auto;
    width: auto;
    min-width: 0;
    z-index: 2;
    margin-left: 0;
    transform: none;
  }
  .topbar.is-search-open .search-toggle {
    width: 0;
    margin: 0;
    opacity: 0;
    border-width: 0;
    pointer-events: none;
  }
  .topbar.is-search-open .search-panel {
    max-width: none;
    width: 100%;
    flex: 1 1 auto;
    opacity: 1;
    pointer-events: auto;
    transform: translateX(0) scaleX(1);
    gap: 0.4rem;
  }
  .topbar.is-search-open .search-input {
    height: 2.5rem;
    min-width: 0;
    border-radius: 12px;
    /* iOS zooms inputs under 16px on focus — keep ≥16px on mobile */
    font-size: 16px;
    background: var(--fill, rgba(255, 255, 255, 0.05));
  }
  .topbar.is-search-open .search-close {
    width: 2.5rem;
    height: 2.5rem;
    border-radius: 12px;
    font-size: 1.35rem;
  }
  .topbar.is-search-open .nav-toggle {
    flex: 0 0 auto;
    margin-left: 0;
  }
  .search-panel {
    transform-origin: left center;
  }
  .topbar .theme-toggle {
    display: none !important;
  }
  .rail {
    padding: 0.45rem 0.65rem;
    gap: 0.3rem;
  }
  .nav-chip {
    padding: 0.32rem 0.65rem;
    font-size: 0.72rem;
  }
}

@media (min-width: 641px) {
  .nav-toggle,
  .site-menu {
    display: none !important;
  }

  .topbar {
    justify-content: space-between;
    gap: 0.85rem 1rem;
  }
  .top-cluster {
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
    margin-left: 0;
    display: flex;
    align-items: center;
    gap: 0.35rem;
    z-index: 2;
  }
  .top-meta {
    margin-left: 0;
    flex: 0 0 auto;
  }

  /* stronger desktop top nav row */
  .top-nav {
    position: relative;
    box-sizing: border-box;
    height: var(--nav-ctrl, 2.35rem);
    padding: 0.18rem;
    gap: 0.12rem;
    border-radius: 999px;
    border: 1px solid rgba(238, 242, 247, 0.1);
    background:
      linear-gradient(180deg, rgba(255, 255, 255, 0.06), rgba(255, 255, 255, 0.02));
    box-shadow:
      inset 0 1px 0 rgba(255, 255, 255, 0.05),
      0 8px 24px rgba(0, 0, 0, 0.18);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    align-items: center;
    flex-wrap: nowrap;
    overflow: hidden;
  }
  .top-link {
    position: relative;
    z-index: 1;
    box-sizing: border-box;
    height: 100%;
    font-weight: 500;
    letter-spacing: 0.02em;
    padding: 0 0.7rem;
    border-radius: 999px;
    display: inline-flex;
    align-items: center;
    transition:
      color 0.22s ease,
      background 0.22s ease,
      border-color 0.22s ease,
      transform 0.22s cubic-bezier(0.22, 1, 0.36, 1),
      box-shadow 0.22s ease,
      opacity 0.22s ease,
      max-width 0.28s cubic-bezier(0.22, 1, 0.36, 1),
      padding 0.28s ease,
      margin 0.28s ease;
  }
  .top-link:hover {
    color: var(--ink, #eef2f7);
    border-color: transparent;
    background: rgba(255, 255, 255, 0.08);
    transform: translateY(-1px);
  }
  .top-link.is-active {
    font-weight: 700;
    box-shadow:
      0 6px 18px color-mix(in srgb, var(--lemon, var(--lime, var(--accent-2, var(--cyan, #3de8d4)))) 28%, transparent),
      inset 0 1px 0 rgba(255, 255, 255, 0.25);
    transform: translateY(-1px);
  }
  .top-link.is-active:hover {
    transform: translateY(-1px);
  }
  .search-slot {
    margin-left: 0;
    align-self: center;
    flex: 0 0 auto;
  }
  .top-cluster .search-slot {
    margin-left: 0.15rem;
  }
  .search-toggle {
    align-self: center;
    box-sizing: border-box;
    width: var(--nav-ctrl, 2.35rem);
    height: var(--nav-ctrl, 2.35rem);
    border-radius: 999px;
    border: 1px solid rgba(238, 242, 247, 0.1);
    background:
      linear-gradient(180deg, rgba(255, 255, 255, 0.06), rgba(255, 255, 255, 0.02));
    box-shadow:
      inset 0 1px 0 rgba(255, 255, 255, 0.05),
      0 8px 24px rgba(0, 0, 0, 0.18);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
  }
  .search-toggle:hover {
    border-color: rgba(238, 242, 247, 0.18);
    background:
      linear-gradient(180deg, rgba(255, 255, 255, 0.1), rgba(255, 255, 255, 0.04));
  }
  .search-input {
    min-width: 0;
    height: var(--nav-ctrl, 2.35rem);
    box-shadow: none;
  }
  .search-input:focus {
    box-shadow: none;
  }

  .topbar.is-search-open {
    flex-wrap: nowrap;
  }
  .topbar.is-search-open .top-nav .top-link {
    display: inline-flex;
    flex: 0 0 0;
    width: 0;
    min-width: 0;
    max-width: 0;
    padding: 0;
    margin: 0;
    opacity: 0;
    border-width: 0;
    transform: translateY(-6px);
    pointer-events: none;
    overflow: hidden;
  }
  .topbar.is-search-open .top-nav {
    flex: 0 0 auto;
    max-width: none;
    min-width: 0;
    justify-content: stretch;
    gap: 0;
    padding: 0.2rem;
    background: transparent;
    box-shadow: none;
    backdrop-filter: none;
    -webkit-backdrop-filter: none;
  }
  .topbar.is-search-open .search-slot {
    width: 0;
    min-width: 0;
    margin-left: 0;
    gap: 0;
    overflow: hidden;
    pointer-events: none;
  }
  .topbar.is-search-open .search-toggle {
    display: none;
  }
  .topbar.is-search-open .top-nav .search-panel {
    flex: 1 1 auto;
    width: 100%;
    max-width: 100%;
    min-width: 0;
    height: 100%;
    opacity: 1;
    pointer-events: auto;
    transform: translateX(0) scaleX(1);
    transform-origin: left center;
    gap: 0.2rem;
  }
  .topbar.is-search-open .top-nav .search-input {
    height: 100%;
    min-height: 0;
    border-radius: 999px;
    border-color: transparent;
    background: transparent;
    box-shadow: none;
  }
  .topbar.is-search-open .top-nav .search-input:focus {
    border-color: transparent;
    background: transparent;
    box-shadow: none;
  }
  .topbar.is-search-open .top-nav .search-close {
    width: 1.85rem;
    height: 1.85rem;
    border-radius: 999px;
    border-color: transparent;
    background: color-mix(in srgb, var(--ink, #eef2f7) 6%, transparent);
    font-size: 1.1rem;
  }
  .topbar.is-search-open .top-nav .search-close:hover,
  .topbar.is-search-open .top-nav .search-close:focus-visible {
    background: color-mix(in srgb, var(--ink, #eef2f7) 12%, transparent);
    border-color: transparent;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-loader-ring,
  .page-loader-text {
    animation: none;
  }
  .page-loader-ring {
    border-color: var(--loader-a);
  }
  .page-loader {
    transition-duration: 0.01ms;
  }
  .stats {
    animation: none;
    opacity: 1;
    transform: none;
  }
  .cat,
  .cat .tool,
  .cat .article,
  .footnote {
    opacity: 1;
    transform: none;
    transition: none;
  }
  .site-menu-panel,
  .site-menu-backdrop,
  .nav-toggle span,
  .search-panel {
    transition: none !important;
  }
}

/* Light theme: desktop nav pill / search chip */
[data-theme="light"] .top-nav {
  border-color: var(--line) !important;
  background: linear-gradient(180deg, #ffffff, #f4f6f9) !important;
  box-shadow:
    inset 0 1px 0 rgba(255, 255, 255, 0.9),
    0 8px 24px rgba(18, 24, 32, 0.08) !important;
}
[data-theme="light"] .topbar.is-search-open .top-nav {
  background: transparent !important;
  box-shadow: none !important;
}
@media (min-width: 641px) {
  [data-theme="light"] .search-toggle {
    border-color: var(--line) !important;
    background: linear-gradient(180deg, #ffffff, #f4f6f9) !important;
    box-shadow:
      inset 0 1px 0 rgba(255, 255, 255, 0.9),
      0 8px 24px rgba(18, 24, 32, 0.08) !important;
  }
  [data-theme="light"] .search-toggle:hover {
    border-color: color-mix(in srgb, var(--ink) 18%, transparent) !important;
    background: linear-gradient(180deg, #ffffff, #eef1f5) !important;
  }
}
@media (max-width: 640px) {
  [data-theme="light"] .search-toggle,
  [data-theme="light"] .nav-toggle {
    border-color: var(--line) !important;
    background: var(--fill) !important;
    box-shadow: none !important;
    color: var(--muted);
  }
  [data-theme="light"] .search-toggle:hover,
  [data-theme="light"] .search-toggle:focus-visible,
  [data-theme="light"] .nav-toggle:hover,
  [data-theme="light"] .nav-toggle:focus-visible {
    color: var(--ink);
    border-color: color-mix(in srgb, var(--accent, var(--lemon, #3de8d4)) 40%, transparent) !important;
    background: color-mix(in srgb, var(--accent, var(--lemon, #3de8d4)) 10%, transparent) !important;
  }
}
[data-theme="light"] .top-link:hover {
  background: rgba(18, 24, 32, 0.05) !important;
}