/* ============================================================
   Header Styles — Life Science Insights Theme
   Design: Boxed floating card · 25% red logo block / 75% white glass
   ============================================================ */

/* ---- Site Header Wrapper ---- */
.lsi-header {
  position: relative;
  z-index: var(--lsi-z-header);
  padding: 0.75rem 1.5rem;
  background: transparent;
  transition: padding var(--lsi-header-transition);
}

/* Overlap mode: fixed floating header */
.lsi-header-overlap .lsi-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
}

/* ---- Glassmorphism Card ---- */
.lsi-header__glass {
  max-width: var(--lsi-container);
  margin-inline: auto;
  height: var(--lsi-header-height);

  display: flex;
  align-items: stretch;
  justify-content: space-between;
  gap: 0;

  border-radius: var(--lsi-glass-radius);
  /*
   * Frosted glass that looks like glass on ANY background — including plain white.
   * Strategy: layered box-shadows create depth + edge highlights.
   * backdrop-filter handles blur when content is behind (fixed/overlap mode).
   * Background is a warm off-white so it reads as a distinct card on white pages.
   */
  background: rgba(250, 247, 245, 0.82);
  backdrop-filter: blur(28px) saturate(160%) brightness(1.04);
  -webkit-backdrop-filter: blur(28px) saturate(160%) brightness(1.04);
  border: 1px solid rgba(255, 255, 255, 0.9);
  outline: 1px solid rgba(200, 190, 185, 0.25);
  overflow: visible;
  box-shadow:
    /* Outer lift */
    0 8px 32px rgba(0, 0, 0, 0.08),
    0 2px 8px rgba(0, 0, 0, 0.05),
    /* Top-edge glass highlight */ inset 0 1px 0 rgba(255, 255, 255, 1),
    /* Left-edge highlight */ inset 1px 0 0 rgba(255, 255, 255, 0.8),
    /* Bottom inner shadow — gives frosted depth */ inset 0 -1px 0
      rgba(180, 165, 155, 0.18);

  transition:
    background var(--lsi-header-transition),
    border-color var(--lsi-header-transition),
    box-shadow var(--lsi-header-transition);
  position: relative;
}

.lsi-header__glass::before {
  display: none;
}

/* Shimmer overlay — hidden */
.lsi-header__glass::after {
  display: none;
}

/* ---- Scrolled State ---- */
.lsi-header.is-scrolled .lsi-header__glass {
  background: rgba(250, 247, 245, 0.88);
  backdrop-filter: blur(32px) saturate(180%) brightness(1.04);
  -webkit-backdrop-filter: blur(32px) saturate(180%) brightness(1.04);
  border-color: rgba(255, 255, 255, 0.95);
  box-shadow:
    0 10px 40px rgba(0, 0, 0, 0.1),
    0 2px 8px rgba(0, 0, 0, 0.06),
    inset 0 1px 0 rgba(255, 255, 255, 1),
    inset 1px 0 0 rgba(255, 255, 255, 0.8),
    inset 0 -1px 0 rgba(180, 165, 155, 0.2);
}

/* ── Dark mode header ────────────────────────────────────────── */

[data-theme="dark"] .lsi-header__glass {
  background: rgba(14, 18, 26, 0.72);
  backdrop-filter: blur(32px) saturate(180%) brightness(0.95);
  -webkit-backdrop-filter: blur(32px) saturate(180%) brightness(0.95);
  border: 1px solid rgba(238, 54, 56, 0.25);
  box-shadow:
    0 4px 24px rgba(0, 0, 0, 0.35),
    0 1px 6px rgba(0, 0, 0, 0.25),
    inset 0 1px 0 rgba(255, 255, 255, 0.08);
}

[data-theme="dark"] .lsi-header__glass::before {
  background: none;
}

/* Scrolled: more opaque */
[data-theme="dark"] .lsi-header.is-scrolled .lsi-header__glass {
  background: rgba(10, 13, 19, 0.97);
  backdrop-filter: blur(40px) saturate(200%) brightness(0.9);
  -webkit-backdrop-filter: blur(40px) saturate(200%) brightness(0.9);
  border-color: rgba(255, 255, 255, 0.08);
  box-shadow:
    0 8px 32px rgba(0, 0, 0, 0.45),
    0 2px 8px rgba(0, 0, 0, 0.3),
    inset 0 1px 0 rgba(255, 255, 255, 0.1);
}

/* Shimmer overlay: hide in dark mode */
[data-theme="dark"] .lsi-header__glass::after {
  display: none;
}

/* Dropdown: dark glass */
[data-theme="dark"] .lsi-nav--desktop .lsi-nav__menu > li > .sub-menu {
  background: rgba(14, 18, 26, 0.92);
  border-color: rgba(255, 255, 255, 0.08);
  box-shadow:
    0 8px 32px rgba(0, 0, 0, 0.4),
    inset 0 1px 0 rgba(255, 255, 255, 0.06);
}

[data-theme="dark"] .lsi-nav--desktop .lsi-nav__menu .sub-menu a {
  color: var(--lsi-text);
}

[data-theme="dark"] .lsi-nav--desktop .lsi-nav__menu .sub-menu a:hover {
  background: rgba(255, 255, 255, 0.06);
  color: var(--lsi-accent);
}

/* Mobile nav panel: dark */
[data-theme="dark"] .lsi-nav--mobile {
  background: rgba(10, 13, 19, 0.97);
  border-color: rgba(255, 255, 255, 0.08);
}

/* Action icon buttons */
[data-theme="dark"] .lsi-header__action-btn {
  color: var(--lsi-text);
}

[data-theme="dark"] .lsi-header__action-btn:hover {
  background: rgba(255, 255, 255, 0.08);
}

/* ---- Logo / Brand block ---- */
.lsi-header__brand {
  flex: 0 0 17%;
  max-width: 17%;
  display: flex;
  align-items: center;
  justify-content: flex-start;
  padding: 0 2rem 0 1.5rem;
  background: var(--lsi-header-logo-bg);
  text-decoration: none;
  position: relative;
  gap: 0.6rem;
  z-index: 2;
  border-radius: var(--lsi-glass-radius) 0 0 var(--lsi-glass-radius);
  overflow: hidden;
}

/* Diagonal wedge */
.lsi-header__brand::after {
  content: "";
  position: absolute;
  top: 0;
  right: -18px;
  bottom: 0;
  width: 36px;
  background: var(--lsi-header-logo-bg);
  clip-path: polygon(0 0, 50% 0, 100% 50%, 50% 100%, 0 100%);
  pointer-events: none;
  z-index: 1;
}

.lsi-header__logo-img {
  height: 70px;
  width: auto;
  display: block;
  max-width: 100%;
  object-fit: contain;
  transition: height var(--lsi-header-transition);
}

.lsi-header__site-name {
  font-family: var(--lsi-font-heading);
  font-size: 1.25rem;
  font-weight: 600;
  color: #fff;
  line-height: 1.1;
  letter-spacing: -0.01em;
  white-space: nowrap;
}

.lsi-header__site-name span {
  color: rgba(255, 255, 255, 0.82);
}

/* ---- Primary Navigation ---- */
.lsi-nav {
  display: flex;
  align-items: center;
  flex: 1;
  min-width: 0;
  justify-content: center;
  padding: 0 0.5rem;
  overflow: visible;
  position: static;
}

.lsi-nav--mobile {
  display: none;
}

.lsi-nav__menu {
  display: flex;
  align-items: center;
  gap: 0.25rem;
  list-style: none;
  margin: 0;
  padding: 0;
}

.lsi-nav__menu > li {
  position: relative;
  margin: 0;
  /* Creates own stacking context so sub-menus escape backdrop-filter on .lsi-header__glass */
  isolation: isolate;
}

.lsi-nav__menu > li > a {
  display: flex;
  align-items: center;
  gap: 0.3rem;
  padding: 0.5rem 0.75rem;
  font-size: var(--lsi-xs);
  font-weight: var(--lsi-fw-medium);
  color: var(--lsi-text);
  text-decoration: none;
  border-radius: var(--lsi-radius-sm);
  transition:
    background var(--lsi-transition),
    color var(--lsi-transition);
  white-space: nowrap;
}

.lsi-nav__menu > li > a:hover,
.lsi-nav__menu > li.current-menu-item > a,
.lsi-nav__menu > li.current-menu-ancestor > a {
  color: var(--lsi-header-logo-bg);
  background: rgba(238, 54, 56, 0.08);
}

/* ---- Dropdown Indicator ---- */
.lsi-nav__menu .menu-item-has-children > a::after {
  content: "";
  display: inline-block;
  width: 6px;
  height: 6px;
  border-right: 1.5px solid currentColor;
  border-bottom: 1.5px solid currentColor;
  transform: rotate(45deg) translateY(-2px);
  transition: transform var(--lsi-transition);
  opacity: 0.6;
}

.lsi-nav__menu .menu-item-has-children:hover > a::after {
  transform: rotate(-135deg) translateY(-2px);
  opacity: 1;
}

/* ---- Dropdown Sub-menu ---- */
.lsi-nav--desktop .lsi-nav__menu > li > .sub-menu {
  position: absolute;
  top: calc(100% + 2rem);
  left: 50%;
  transform: translateX(-50%) translateY(8px);
  min-width: 200px;

  /* Glass liquid effect */
  background: rgba(255, 255, 255, 0.75);
  backdrop-filter: blur(24px) saturate(200%) brightness(1.06);
  -webkit-backdrop-filter: blur(24px) saturate(200%) brightness(1.06);
  border: 1px solid rgba(255, 255, 255, 0.85);
  border-radius: 14px;
  box-shadow:
    0 8px 32px rgba(0, 0, 0, 0.12),
    0 2px 8px rgba(0, 0, 0, 0.06),
    inset 0 1px 0 rgba(255, 255, 255, 0.9);

  list-style: none;
  margin: 0;
  padding: 0.5rem;
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transition:
    opacity 0.2s ease,
    transform 0.2s ease,
    visibility 0.2s ease;
  z-index: 9999;
}

/* Connector line from header bottom to dropdown top */
.lsi-nav--desktop .lsi-nav__menu > li > .sub-menu::after {
  content: "";
  position: absolute;
  bottom: 100%;
  left: 50%;
  transform: translateX(-50%);
  width: 2px;
  height: 1.25rem;
  background: linear-gradient(to bottom, transparent, rgba(255, 255, 255, 0.6));
  pointer-events: none;
}

/* Invisible hover bridge so mouse can cross the gap */
.lsi-nav--desktop .lsi-nav__menu > li > .sub-menu::before {
  content: "";
  position: absolute;
  bottom: 100%;
  left: -1rem;
  right: -1rem;
  height: 2rem;
}

.lsi-nav--desktop .lsi-nav__menu > li:hover > .sub-menu,
.lsi-nav--desktop .lsi-nav__menu > li:focus-within > .sub-menu {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
  transform: translateX(-50%) translateY(0);
}

.lsi-nav--desktop .lsi-nav__menu .sub-menu li {
  margin: 0;
}

.lsi-nav--desktop .lsi-nav__menu .sub-menu a {
  display: block;
  padding: 0.6rem 1rem;
  font-size: var(--lsi-xs);
  color: var(--lsi-text);
  text-decoration: none;
  border-radius: 8px;
  white-space: nowrap;
  transition:
    background var(--lsi-transition),
    color var(--lsi-transition);
}

.lsi-nav--desktop .lsi-nav__menu .sub-menu a:hover {
  background: rgba(238, 54, 56, 0.08);
  color: var(--lsi-header-logo-bg);
}

/* ---- Header Actions ---- */
.lsi-header__actions {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  flex-shrink: 0;
  padding-right: 1.25rem;
  position: relative;
  z-index: 2;
}

.lsi-header__search-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 38px;
  height: 38px;
  border-radius: var(--lsi-radius-sm);
  background: transparent;
  border: none;
  cursor: pointer;
  color: var(--lsi-text-secondary);
  transition:
    background var(--lsi-transition),
    color var(--lsi-transition);
  padding: 0;
}
.lsi-header__search-btn:hover {
  background: rgba(238, 54, 56, 0.08);
  color: var(--lsi-header-logo-bg);
}
.lsi-header__search-btn svg {
  width: 18px;
  height: 18px;
  pointer-events: none;
}

/* ── iOS-style theme switch ── */
.lsi-header__dark-btn {
  background: none;
  border: none;
  padding: 0;
  cursor: pointer;
  display: flex;
  align-items: center;
  flex-shrink: 0;
}
.lsi-theme-switch__track {
  position: relative;
  display: flex;
  align-items: center;
  width: 56px;
  height: 28px;
  border-radius: 999px;
  background: #f0f0f0;
  border: 1.5px solid #ddd;
  transition:
    background 0.3s ease,
    border-color 0.3s ease;
  box-shadow: inset 0 1px 3px rgba(0, 0, 0, 0.08);
}
/* Sun icon — left side */
.lsi-theme-switch__sun {
  position: absolute;
  left: 6px;
  display: flex;
  align-items: center;
  color: #e5483c;
  z-index: 1;
  transition: opacity 0.2s ease;
}
/* Moon icon — right side */
.lsi-theme-switch__moon {
  position: absolute;
  right: 6px;
  display: flex;
  align-items: center;
  color: #aaa;
  z-index: 1;
  transition:
    opacity 0.2s ease,
    color 0.2s ease;
}
/* Knob */
.lsi-theme-switch__knob {
  position: absolute;
  left: 2px;
  width: 22px;
  height: 22px;
  border-radius: 50%;
  background: #fff;
  box-shadow:
    0 1px 4px rgba(0, 0, 0, 0.18),
    0 0 0 0.5px rgba(0, 0, 0, 0.06);
  transition:
    transform 0.28s cubic-bezier(0.4, 0, 0.2, 1),
    background 0.28s ease;
  z-index: 2;
}

/* Dark state — knob slides right, track turns dark */
[data-theme="dark"] .lsi-theme-switch__track {
  background: #23272f;
  border-color: #3a3f4b;
}
[data-theme="dark"] .lsi-theme-switch__knob {
  transform: translateX(28px);
  background: #fff;
}
[data-theme="dark"] .lsi-theme-switch__moon {
  color: #fff;
}
[data-theme="dark"] .lsi-theme-switch__sun {
  color: rgba(255, 255, 255, 0.3);
}

/* Subscribe CTA */
.lsi-header__subscribe {
  display: inline-flex;
  width: fit-content;
  align-items: center;
  padding: 0.5rem 1.25rem;
  font-size: var(--lsi-xs);
  font-weight: var(--lsi-fw-semibold);
  background: var(--lsi-header-logo-bg);
  color: #fff;
  border-radius: var(--lsi-radius-full);
  text-decoration: none;
  border: none;
  cursor: pointer;
  transition: background var(--lsi-transition);
  white-space: nowrap;
}

.lsi-header__subscribe:hover {
  background: var(--lsi-header-red-dark);
  color: #fff;
}

/* ── Normal header mode ─────────────────────────────────────────
   Glass on white: backdrop-filter is invisible on plain white bg.
   We make glass visible through a tinted gradient fill + colored border.
   ────────────────────────────────────────────────────────────── */

/* Normal mode: same glass card as overlap — inherits base styles, no overrides needed */
.lsi-header-normal .lsi-header__glass::after {
  display: none;
}

/* Sticky on scroll in normal mode */
.lsi-header-normal .lsi-header.is-sticky {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  animation: lsi-sticky-in 0.28s cubic-bezier(0.22, 1, 0.36, 1) both;
}

.lsi-header-normal.admin-bar .lsi-header.is-sticky,
.lsi-header-normal .admin-bar .lsi-header.is-sticky {
  top: 32px;
}

@media screen and (max-width: 782px) {
  .lsi-header-normal.admin-bar .lsi-header.is-sticky,
  .lsi-header-normal .admin-bar .lsi-header.is-sticky {
    top: 46px;
  }
}

@keyframes lsi-sticky-in {
  from {
    transform: translateY(-100%);
    opacity: 0.6;
  }
  to {
    transform: translateY(0);
    opacity: 1;
  }
}

/* Sticky state: stronger glass */
.lsi-header-normal .lsi-header.is-sticky .lsi-header__glass {
  background: rgba(250, 247, 245, 0.82);
  backdrop-filter: blur(28px) saturate(160%) brightness(1.04);
  -webkit-backdrop-filter: blur(28px) saturate(160%) brightness(1.04);
  border: 1px solid rgba(255, 255, 255, 0.90);
  outline: 1px solid rgba(200, 190, 185, 0.25);
  box-shadow:
    0 10px 40px rgba(0, 0, 0, 0.10),
    0 2px 8px rgba(0, 0, 0, 0.06),
    inset 0 1px 0 rgba(255, 255, 255, 1),
    inset 1px 0 0 rgba(255, 255, 255, 0.80),
    inset 0 -1px 0 rgba(180, 165, 155, 0.18);
}

/* Dark mode normal header — inherits dark glass from [data-theme="dark"] .lsi-header__glass */

[data-theme="dark"]
  .lsi-header-normal
  .lsi-header.is-sticky
  .lsi-header__glass {
  background: rgba(10, 13, 19, 0.97);
  backdrop-filter: blur(40px) saturate(200%) brightness(0.9);
  -webkit-backdrop-filter: blur(40px) saturate(200%) brightness(0.9);
  border-color: rgba(238, 54, 56, 0.25);
  box-shadow:
    0 8px 32px rgba(0, 0, 0, 0.45),
    inset 0 1px 0 rgba(255, 255, 255, 0.08);
}

/* ---- Mobile Menu Toggle ---- */
.lsi-header__menu-toggle {
  display: none;
  flex-direction: column;
  justify-content: space-between;
  width: 24px;
  height: 18px;
  background: transparent;
  border: none;
  cursor: pointer;
  padding: 0;
  gap: 6px;
}

.lsi-header__menu-toggle span {
  display: block;
  height: 2px;
  background: var(--lsi-text);
  border-radius: 2px;
  transition: all var(--lsi-transition);
}

.lsi-header__menu-toggle.is-open span:nth-child(1) {
  transform: translateY(8px) rotate(45deg);
}
.lsi-header__menu-toggle.is-open span:nth-child(2) {
  opacity: 0;
  transform: scaleX(0);
}
.lsi-header__menu-toggle.is-open span:nth-child(3) {
  transform: translateY(-8px) rotate(-45deg);
}

/* ---- Search Overlay ---- */
.lsi-search-overlay {
  position: fixed;
  inset: 0;
  z-index: calc(var(--lsi-z-header) + 10);
  background: rgba(0, 0, 0, 0.5);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  display: flex;
  align-items: flex-start;
  justify-content: center;
  padding-top: 12vh;
  opacity: 0;
  visibility: hidden;
  transition:
    opacity var(--lsi-transition-slow),
    visibility var(--lsi-transition-slow);
}

.lsi-search-overlay.is-open {
  opacity: 1;
  visibility: visible;
}

.lsi-search-overlay__inner {
  width: 100%;
  max-width: 640px;
  padding-inline: 1.5rem;
  transform: translateY(-20px);
  transition: transform var(--lsi-transition-slow);
}

.lsi-search-overlay.is-open .lsi-search-overlay__inner {
  transform: translateY(0);
}

/* ---- Body offset for fixed header (overlap mode only) ---- */
/* JS sets --lsi-header-offset on <html> dynamically; CSS fallback for desktop */
.lsi-header-overlap body {
  padding-top: var(--lsi-header-offset, calc(var(--lsi-header-height) + 1.5rem));
}

/* ---- WordPress Admin Bar (overlap mode only — fixed header needs top offset) ---- */
.lsi-header-overlap.admin-bar .lsi-header,
.lsi-header-overlap .admin-bar .lsi-header {
  top: 32px;
}

@media screen and (max-width: 782px) {
  .lsi-header-overlap.admin-bar .lsi-header,
  .lsi-header-overlap .admin-bar .lsi-header {
    top: 46px;
  }
}

/* ---- Responsive ---- */
@media (max-width: 1200px) {
  .lsi-nav__menu > li > a {
    padding: 0.5rem 0.5rem;
    font-size: 0.78rem;
  }
}

@media (max-width: 1024px) {
  .lsi-header__subscribe {
    display: none;
  }
  .lsi-nav__menu > li > a {
    padding: 0.5rem 0.4rem;
    font-size: 0.75rem;
  }
}

@media (max-width: 900px) {
  .lsi-header {
    padding: 0.5rem 1rem;
    z-index: calc(var(--lsi-z-header) + 10);
  }

  .lsi-header__brand {
    flex: 0 0 auto;
    max-width: none;
    padding: 0 1rem;
  }

  .lsi-header__menu-toggle {
    display: flex;
  }

  .lsi-nav--desktop {
    display: none;
  }

  /* Mobile nav panel */
  .lsi-nav--mobile {
    display: block;
    position: absolute;
    top: calc(100% + 0.5rem);
    left: 1rem;
    right: 1rem;
    background: rgba(255, 255, 255, 0.97);
    backdrop-filter: blur(24px) saturate(180%);
    -webkit-backdrop-filter: blur(24px) saturate(180%);
    border: 1px solid rgba(255, 255, 255, 0.75);
    border-radius: 14px;
    padding: 0.5rem;
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    transform: translateY(-8px);
    transition:
      opacity var(--lsi-transition-slow),
      transform var(--lsi-transition-slow),
      visibility var(--lsi-transition-slow);
    z-index: calc(var(--lsi-z-header) + 5);
  }

  .lsi-nav--mobile.is-open {
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
    transform: translateY(0);
  }

  .lsi-nav--mobile .lsi-nav__menu {
    flex-direction: column;
    gap: 0;
    width: 100%;
  }

  .lsi-nav--mobile .lsi-nav__menu > li > a {
    font-size: var(--lsi-small);
    font-weight: var(--lsi-fw-medium);
    padding: 0.7rem 1rem;
    justify-content: flex-start;
    color: var(--lsi-text);
    border-radius: 8px;
  }

  .lsi-nav--mobile .lsi-nav__menu > li > a:hover,
  .lsi-nav--mobile .lsi-nav__menu > li.current-menu-item > a {
    color: var(--lsi-header-logo-bg);
    background: rgba(238, 54, 56, 0.07);
  }

  .lsi-header__menu-toggle span {
    background: var(--lsi-text);
  }

  .lsi-nav--mobile .lsi-nav__menu .sub-menu {
    position: static;
    transform: none;
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
    background: rgba(238, 54, 56, 0.04);
    box-shadow: none;
    border: 1px solid rgba(238, 54, 56, 0.1);
    border-radius: 8px;
    margin: 0.25rem 0.5rem 0.25rem 1rem;
    padding: 0.25rem;
    display: none;
  }

  .lsi-nav--mobile
    .lsi-nav__menu
    .menu-item-has-children.is-expanded
    > .sub-menu {
    display: block;
  }

  .lsi-nav--mobile .lsi-nav__menu .sub-menu a {
    font-size: var(--lsi-xs);
    color: var(--lsi-text-secondary);
    padding: 0.5rem 0.875rem;
    border-radius: 6px;
  }

  .lsi-nav--mobile .lsi-nav__menu .sub-menu a:hover {
    color: var(--lsi-header-logo-bg);
    background: rgba(238, 54, 56, 0.07);
  }

}

@media (max-width: 480px) {
  .lsi-header__actions {
    padding-right: 0.75rem;
  }
  .lsi-header__site-name {
    font-size: 1.05rem;
  }
}