/* PWHL Insights masthead and navigation. Written by pwhl-cli (navStylesheet in main.swift) and shared by every section. */

@property --glow-x { syntax: '<length>'; inherits: true; initial-value: -400px; }
@property --glow-o { syntax: '<number>'; inherits: true; initial-value: 0; }

.header-wrapper {
  --nav-soft: oklch(84% 0.03 295);
  --nav-mute: oklch(70% 0.045 295);
  --nav-lilac: #cebdf2;
  --nav-ease: cubic-bezier(0.2, 0.8, 0.2, 1);
  --nav-glide: cubic-bezier(0.7, 0, 0.2, 1);
  position: sticky;
  top: 0;
  z-index: 60;
  color: #fff;
  font-family: 'Transducer', sans-serif;
  font-weight: 500;
  -webkit-font-smoothing: antialiased;
  background: oklch(13% 0.014 292 / 0.74);
  -webkit-backdrop-filter: blur(20px) saturate(1.5);
  backdrop-filter: blur(20px) saturate(1.5);
  transition: background-color 0.35s ease, box-shadow 0.35s ease, --glow-x 0.5s var(--nav-glide), --glow-o 0.4s ease;
}
.header-wrapper.is-instant { transition: none; }
.header-wrapper.is-scrolled {
  background: oklch(13% 0.014 292 / 0.86);
  box-shadow: 0 16px 36px -24px oklch(0% 0 0 / 0.95);
}
.header-wrapper *, .header-wrapper *::before, .header-wrapper *::after { box-sizing: border-box; }
.header-wrapper a, .header-wrapper p, .header-wrapper span, .header-wrapper button, .header-wrapper kbd { font-family: inherit; }

/* The bottom rule, lit beneath the current page; the light follows the pointer along the nav. */
.header-wrapper::before {
  content: '';
  position: absolute;
  left: 0;
  right: 0;
  bottom: -1px;
  height: 1px;
  pointer-events: none;
  background:
    radial-gradient(170px 1px at var(--glow-x) 50%, oklch(90% 0.07 300 / var(--glow-o)), oklch(90% 0.07 300 / 0)),
    linear-gradient(90deg, oklch(100% 0 0 / 0.03), oklch(100% 0 0 / 0.1) 18%, oklch(100% 0 0 / 0.1) 82%, oklch(100% 0 0 / 0.03));
}
.header-wrapper::after {
  content: '';
  position: absolute;
  left: 0;
  right: 0;
  top: 100%;
  height: 26px;
  pointer-events: none;
  background: radial-gradient(130px 26px at var(--glow-x) 0, oklch(70% 0.17 300 / calc(0.2 * var(--glow-o))), oklch(70% 0.17 300 / 0));
}

.header-wrapper .main-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  min-height: 68px;
}

/* Brand */
.header-wrapper .header-brand { display: flex; align-items: center; gap: 12px; min-width: 0; }
.header-wrapper .header-icon-link { display: block; flex: none; border-radius: 11px; }
.header-wrapper .header-icon {
  display: block;
  width: 40px;
  height: 40px;
  border-radius: 11px;
  box-shadow: 0 0 0 1px oklch(100% 0 0 / 0.1), 0 8px 18px -10px oklch(45% 0.2 295 / 0.9);
  transition: transform 0.6s cubic-bezier(0.34, 1.56, 0.64, 1);
}
.header-wrapper .header-brand:hover .header-icon { transform: rotate(-10deg) scale(1.05); }
.header-wrapper .brand-text { min-width: 0; }
.header-wrapper .logo {
  display: block;
  font-size: 1.25rem;
  font-weight: 500;
  line-height: 1.1;
  letter-spacing: 0.01em;
  color: #fff;
  text-decoration: none;
  white-space: nowrap;
}
.header-wrapper .header-subtitle {
  margin: 3px 0 0;
  font-size: 0.75rem;
  line-height: 1.3;
  color: var(--nav-lilac);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

/* Links */
.header-wrapper .header-nav { display: flex; align-items: center; }
.header-wrapper .nav-links { position: relative; isolation: isolate; display: flex; align-items: center; gap: 0; }
.header-wrapper .nav-links a {
  position: relative;
  display: flex;
  align-items: center;
  gap: 10px;
  height: 40px;
  padding: 0 13px;
  border-radius: 10px;
  color: var(--nav-soft);
  font-size: 0.9375rem;
  font-weight: 500;
  letter-spacing: 0.01em;
  text-decoration: none;
  white-space: nowrap;
  transition: color 0.25s ease;
}
.header-wrapper .nav-links a i { display: none; width: 1.1em; color: var(--nav-lilac); font-size: 0.9375rem; text-align: center; }
.header-wrapper .nav-links a:hover,
.header-wrapper .nav-links a:focus-visible,
.header-wrapper .nav-links a[aria-current="page"] { color: #fff; }
/* Without the script, the current page keeps a plain lilac underline. */
.header-wrapper .nav-links a[aria-current="page"]::after {
  content: '';
  position: absolute;
  left: 13px;
  right: 13px;
  bottom: 5px;
  height: 3px;
  border-radius: 1px;
  background: var(--nav-lilac);
  transform: skewX(-28deg);
}
.header-wrapper a:focus-visible, .header-wrapper button:focus-visible {
  outline: 2px solid oklch(82% 0.11 300);
  outline-offset: 2px;
}

/* The plate: a slanted pane of glass behind the current (or pointed-at) link.
   The glider: the lit, slanted segment under its label. Both slide leading edge first, tail catching up. */
.header-wrapper .nav-plate,
.header-wrapper .nav-glider {
  position: absolute;
  left: 0;
  right: 100%;
  opacity: 0;
  pointer-events: none;
  transition: left 0.52s var(--nav-glide), right 0.32s var(--nav-glide), opacity 0.3s ease;
}
.header-wrapper .nav-plate.to-left,
.header-wrapper .nav-glider.to-left { transition: left 0.32s var(--nav-glide), right 0.52s var(--nav-glide), opacity 0.3s ease; }
.header-wrapper .nav-plate.is-instant,
.header-wrapper .nav-glider.is-instant { transition: none; }
.header-wrapper .nav-plate {
  z-index: -1;
  top: 50%;
  height: 40px;
  margin-top: -20px;
  border-radius: 9px;
  background: linear-gradient(180deg, oklch(100% 0 0 / 0.1), oklch(100% 0 0 / 0.035));
  box-shadow: inset 0 1px 0 oklch(100% 0 0 / 0.09), inset 0 0 0 1px oklch(100% 0 0 / 0.05), 0 10px 22px -14px oklch(0% 0 0 / 0.9);
  transform: skewX(-12deg);
}
.header-wrapper .nav-glider {
  bottom: 5px;
  height: 3px;
  border-radius: 1px;
  background: linear-gradient(90deg, #9b7cf0 0%, #cebdf2 60%, #ffffff 100%);
  box-shadow: 0 0 10px rgba(190, 160, 255, 0.75), 0 -8px 22px -6px rgba(170, 130, 255, 0.55);
  transform: skewX(-28deg);
}
.header-wrapper .nav-glider.is-intro { animation: nav-glider-in 0.7s cubic-bezier(0.2, 0.8, 0.2, 1) 0.1s both; }
@keyframes nav-glider-in {
  from { opacity: 0; transform: skewX(-28deg) scaleX(0); }
  to { opacity: 1; transform: skewX(-28deg) scaleX(1); }
}
.header-wrapper .nav-links.has-glider a[aria-current="page"]::after { display: none; }

/* Search: a command pill with its keyboard shortcut. */
.header-wrapper .nav-search {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  flex: none;
  height: 40px;
  margin-left: 10px;
  padding: 0 7px 0 14px;
  border: 0;
  border-radius: 10px;
  background: oklch(100% 0 0 / 0.045);
  box-shadow: inset 0 0 0 1px oklch(100% 0 0 / 0.09);
  color: var(--nav-soft);
  font-size: 0.875rem;
  font-weight: 500;
  letter-spacing: 0.01em;
  cursor: pointer;
  -webkit-tap-highlight-color: transparent;
  transition: background-color 0.2s ease, color 0.2s ease, box-shadow 0.2s ease, transform 0.12s ease;
}
.header-wrapper .nav-search i { color: var(--nav-lilac); font-size: 0.875rem; }
.header-wrapper .nav-search .ns-kbd {
  display: inline-grid;
  place-items: center;
  min-width: 30px;
  height: 24px;
  padding: 0 7px;
  border-radius: 6px;
  background: oklch(100% 0 0 / 0.07);
  box-shadow: inset 0 0 0 1px oklch(100% 0 0 / 0.07), inset 0 -1px 0 oklch(0% 0 0 / 0.35);
  color: var(--nav-mute);
  font-size: 0.75rem;
  letter-spacing: 0.03em;
}
.header-wrapper .nav-search:hover {
  background: oklch(100% 0 0 / 0.085);
  box-shadow: inset 0 0 0 1px oklch(83% 0.075 300 / 0.38);
  color: #fff;
}
.header-wrapper .nav-search:active { transform: scale(0.97); }

/* Menu button (phones) */
.header-wrapper .hamburger-menu {
  display: none;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 5px;
  width: 44px;
  height: 44px;
  margin-right: -10px;
  padding: 0;
  border: 0;
  border-radius: 10px;
  background: transparent;
  color: #fff;
  cursor: pointer;
  -webkit-tap-highlight-color: transparent;
}
.header-wrapper .hamburger-line {
  display: block;
  width: 22px;
  height: 2px;
  border-radius: 2px;
  background: currentColor;
  transition: transform 0.3s var(--nav-ease), opacity 0.2s ease;
}
.header-wrapper .hamburger-menu.active .hamburger-line:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.header-wrapper .hamburger-menu.active .hamburger-line:nth-child(2) { opacity: 0; }
.header-wrapper .hamburger-menu.active .hamburger-line:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

.skip-link { z-index: 100; }

@media (max-width: 1239px) {
  .header-wrapper .header-subtitle { display: none; }
}
@media (max-width: 1080px) {
  .header-wrapper .nav-links a { padding: 0 11px; }
  .header-wrapper .nav-links a[aria-current="page"]::after { left: 11px; right: 11px; }
  .header-wrapper .nav-search { width: 40px; padding: 0; justify-content: center; }
  .header-wrapper .nav-search .ns-label, .header-wrapper .nav-search .ns-kbd { display: none; }
}
@media (max-width: 900px) {
  .header-wrapper .main-header { min-height: 60px; }
  .header-wrapper .hamburger-menu { display: flex; }
  .header-wrapper .nav-search { order: -1; width: 44px; height: 44px; margin: 0 2px 0 0; background: transparent; box-shadow: none; color: #fff; }
  .header-wrapper .nav-search i { color: #fff; font-size: 1.0625rem; }
  .header-wrapper .nav-links {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    display: none;
    flex-direction: column;
    align-items: stretch;
    gap: 2px;
    padding: 8px 16px 20px;
    background: oklch(14.5% 0.016 292);
    border-bottom: 1px solid oklch(100% 0 0 / 0.08);
    box-shadow: 0 28px 44px -28px oklch(0% 0 0 / 0.95);
  }
  .header-wrapper .nav-links.active { display: flex; animation: nav-drawer-in 0.34s var(--nav-ease) both; }
  .header-wrapper .nav-links a { height: 52px; padding: 0 14px; color: #fff; font-size: 1.0625rem; }
  .header-wrapper .nav-links a i { display: inline-block; }
  .header-wrapper .nav-links a:hover { background: oklch(100% 0 0 / 0.05); }
  .header-wrapper .nav-links a[aria-current="page"] { background: oklch(100% 0 0 / 0.08); }
  .header-wrapper .nav-links a[aria-current="page"]::after,
  .header-wrapper .nav-links.has-glider a[aria-current="page"]::after {
    display: block;
    left: auto;
    right: 16px;
    top: 50%;
    bottom: auto;
    width: 8px;
    height: 8px;
    margin-top: -4px;
    border-radius: 2px;
    transform: skewX(-14deg);
  }
  .header-wrapper .nav-plate, .header-wrapper .nav-glider, .header-wrapper::after { display: none; }
}
@keyframes nav-drawer-in {
  from { opacity: 0; transform: translateY(-6px); clip-path: inset(0 0 100% 0); }
  to { opacity: 1; transform: none; clip-path: inset(0 0 0 0); }
}
@media (prefers-reduced-motion: reduce) {
  .header-wrapper, .header-wrapper .nav-plate, .header-wrapper .nav-glider { transition: opacity 0.2s ease; }
  .header-wrapper .nav-glider.is-intro, .header-wrapper .nav-links.active { animation: none; }
  .header-wrapper .header-brand:hover .header-icon { transform: none; }
}
@media print {
  .header-wrapper { display: none; }
}