/* ============================================================
 * Neurotype V2 — Layout
 * Shared across every page: reset, body, nav overrides,
 * section wrapper, footer, acknowledgement
 * ========================================================== */

/* ---- Reset ---- */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
}

*:focus-visible {
  outline: 1.5px solid var(--neurotype-accent-primary);
  outline-offset: 2px;
}

body {
  background: var(--bg-primary);
  position: relative;
}

body::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: url('../assets/topography-background.jpg') repeat-y center top;
  background-size: 100% auto;
  background-position: center calc(100vh - 120px);
  opacity: 0.11;
  pointer-events: none;
  z-index: -1;
  -webkit-mask-image: linear-gradient(to bottom, transparent 90vh, black 100vh, black 90%, transparent 100%);
  mask-image: linear-gradient(to bottom, transparent 90vh, black 100vh, black 90%, transparent 100%);
}

/* ---- Section wrapper ---- */
.section {
  padding-left: var(--space-5);
  padding-right: var(--space-5);
  max-width: var(--content-max-width);
  margin: 0 auto;
}

@media (min-width: 769px) {
  .section {
    padding-left: var(--space-7);
    padding-right: var(--space-7);
  }
}

/* ---- Fraunces WONK axis: use conventional style globally ---- */
h1, h2, h3, h4,
.h1, .h2, .h3, .h4,
.display,
.nav-logo,
.nav-logo-text,
.footer-brand,
.intro-byline-name {
  font-variation-settings: 'WONK' 0;
}

/* ---- Nav overrides: transparent-to-frosted scroll ---- */
.site-nav {
  background: transparent;
  backdrop-filter: none;
  transition: background var(--duration-default) var(--ease-default),
              backdrop-filter var(--duration-default) var(--ease-default),
              transform var(--duration-default) var(--ease-default);
}

/* Centre the nav-links pill via grid */
@media (min-width: 901px) {
  .site-nav {
    display: grid;
    grid-template-columns: 1fr auto 1fr;
    align-items: center;
    column-gap: var(--space-4);
  }

  .site-nav .nav-links {
    position: relative;
    left: auto;
    transform: none;
  }

  .site-nav .nav-logo {
    justify-self: start;
  }

  .site-nav .nav-cta {
    justify-self: end;
  }

  .site-nav .nav-mobile-toggle {
    display: none;
  }
}

.site-nav.nav-hidden .nav-links {
  transform: translateY(-150%);
  opacity: 0;
}

@media (max-width: 900px) {
  .site-nav.nav-hidden .nav-logo {
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    transform: scale(0.462) translateY(-100%);
  }

  .nav-logo {
    transition: opacity var(--duration-default) var(--ease-default),
                visibility var(--duration-default) var(--ease-default),
                transform var(--duration-default) var(--ease-default);
  }

  body::after {
    background-size: 200% auto;
    opacity: 0.06;
  }

  .nav-mobile-menu {
    top: calc(var(--space-8) - 35px);
    padding-top: calc(35px + var(--space-6));
    background: transparent;
    overflow-x: hidden;
  }

  .nav-mobile-menu::after {
    content: '';
    position: fixed;
    top: var(--space-8);
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--bg-primary);
    z-index: -1;
  }

  .nav-mobile-menu-wave {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 35px;
    pointer-events: none;
  }
}

.site-nav:not(.scrolled) {
  text-shadow: 0 0 12px var(--bg-primary-heavy);
}

.site-nav.scrolled {
  text-shadow: none;
}

/* ---- Nav interaction: ghost hover + tinted pill selected ---- */
/* Shared base: all clickable nav items (top-level + dropdown) */
.site-nav .nav-links > a,
.site-nav .nav-links .nav-dropdown > a,
.site-nav .nav-dropdown-item {
  position: relative;
  z-index: 1;
  border-bottom: none;
  border-left: none;
  padding: var(--space-2) var(--space-4);
  border-radius: var(--radius-pill);
  transition: background var(--duration-fast) var(--ease-default),
              box-shadow var(--duration-fast) var(--ease-default),
              color var(--duration-fast) var(--ease-default);
}

/* Hover: ghost outline, no colour change */
.site-nav .nav-links > a:hover,
.site-nav .nav-links .nav-dropdown > a:hover,
.site-nav .nav-dropdown-item:hover {
  box-shadow: inset 0 0 0 1px var(--border-subtle);
  color: var(--text-secondary);
  border-bottom-color: transparent;
}

.site-nav .nav-dropdown-item:hover .nav-dropdown-item-title {
  color: var(--text-secondary);
  border-bottom-color: transparent;
}

/* Selected: tinted pill */
.site-nav .nav-links > a.active,
.site-nav .nav-links > a[aria-current="page"],
.site-nav .nav-links .nav-dropdown > a.active,
.site-nav .nav-links .nav-dropdown > a[aria-current="page"],
.site-nav .nav-dropdown-item.active,
.site-nav .nav-dropdown-item[aria-current="page"] {
  background: var(--neurotype-accent-subtle);
  color: var(--text-primary);
  font-weight: 500;
}

.site-nav .nav-dropdown-item.active .nav-dropdown-item-title,
.site-nav .nav-dropdown-item[aria-current="page"] .nav-dropdown-item-title {
  color: var(--text-primary);
  font-weight: 600;
}

/* ---- Nav pill: frosted glass on ::before pseudo ---- */
.site-nav .nav-links {
  position: relative;
  left: 0;
  background: transparent;
  backdrop-filter: none;
  -webkit-backdrop-filter: none;
  border: none;
  overflow: visible;
}

.site-nav .nav-links::before {
  content: '';
  position: absolute;
  inset: 0;
  background: rgba(255, 255, 255, 0.6);
  backdrop-filter: blur(var(--blur-nav));
  -webkit-backdrop-filter: blur(var(--blur-nav));
  border-radius: var(--radius-pill, 999px);
  z-index: -1;
  pointer-events: none;
}

/* ---- Nav dropdown: lobe ---- */
.site-nav .nav-dropdown-menu {
  top: 100%;
  left: 50%;
  transform: translateX(-50%);
  padding-top: var(--space-3); /* hover bridge gap */
  background: transparent;
  backdrop-filter: none;
  -webkit-backdrop-filter: none;
  border: none;
  border-radius: 0;
  box-shadow: none;
  overflow: visible;
}

.site-nav .nav-dropdown-menu-inner {
  position: relative;
  min-width: auto;
  background: rgba(255, 255, 255, 0.6);
  backdrop-filter: blur(var(--blur-nav));
  -webkit-backdrop-filter: blur(var(--blur-nav));
  border: none;
  border-radius: 0 0 var(--radius-lg) var(--radius-lg);
  padding: var(--space-4) var(--space-4) var(--space-3);
  box-shadow: none;
}

.site-nav .nav-dropdown-menu-inner::before,
.site-nav .nav-dropdown-menu-inner::after {
  display: none;
}

.site-nav .nav-dropdown-item {
  white-space: nowrap;
  padding: var(--space-2) var(--space-4);
}

.site-nav .nav-dropdown-item-title {
  font-size: var(--text-small);
}

/* ---- Felt patch logo ---- */
.nav-logo {
  position: relative;
  padding: var(--space-3) var(--space-6);
  padding-top: var(--space-4);
  z-index: 1;
  transform: scale(0.8);
  transform-origin: top left;
}

.nav-logo::before {
  content: '';
  position: absolute;
  inset: -23px -60px -49px;
  background: url('../assets/felt-patch-logo-base.png') center / contain no-repeat;
  z-index: -1;
}

.nav-logo-text {
  position: relative;
  z-index: 1;
  font-size: 0.945em;
  top: 15px;
}

@media (max-width: 900px) {
  .nav-logo {
    transform: scale(0.462);
  }
}

/* ---- Footer ---- */
.site-footer {
  border-top: 1px solid var(--border-subtle);
  padding: var(--space-7) var(--space-5);
}

.footer-inner {
  max-width: var(--content-max-width);
  margin: 0 auto;
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: baseline;
  gap: var(--space-5) var(--space-7);
}

.footer-brand {
  font-family: var(--font-heading);
  font-size: var(--text-h4);
  font-weight: 500;
  color: var(--text-heading);
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-4);
}

.footer-links a {
  color: var(--text-secondary);
  text-decoration: none;
  font-size: var(--text-caption);
}

.footer-links a:hover {
  color: var(--neurotype-accent-primary);
}

.footer-bottom {
  max-width: var(--content-max-width);
  margin: 0 auto;
  padding: var(--space-5) 0 0;
  border-top: 1px solid var(--border-subtle);
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: baseline;
  gap: var(--space-3);
}

.footer-bottom a {
  text-decoration: none;
}

/* ---- Acknowledgement ---- */
.acknowledgement {
  max-width: var(--content-max-width);
  margin: 0 auto;
  padding: var(--space-3) 0 0;
  text-align: left;
}

.acknowledgement-toggle {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  background: none;
  border: none;
  cursor: pointer;
  color: var(--text-secondary);
  font: inherit;
  font-size: var(--text-fine);
  padding: 0;
}

.acknowledgement-toggle:hover {
  color: var(--text-primary);
}

.acknowledgement-chevron {
  display: inline-block;
  transition: transform var(--duration-default) var(--ease-default);
  font-size: var(--text-fine);
}

.acknowledgement-toggle[aria-expanded="true"] .acknowledgement-chevron {
  transform: rotate(180deg);
}

.acknowledgement-content {
  max-width: var(--prose-max-width);
  margin: 0 auto;
  overflow: hidden;
  max-height: 0;
  opacity: 0;
  transition: max-height var(--duration-slow) var(--ease-enter), opacity var(--duration-default) var(--ease-enter), margin var(--duration-default) var(--ease-enter);
}

.acknowledgement-content.open {
  max-height: 300px;
  opacity: 1;
  margin-top: var(--space-4);
}

.acknowledgement-content p + p {
  margin-top: var(--space-3);
}

/* ---- Footer mobile ---- */
@media (max-width: 900px) {
  .site-footer {
    padding: var(--space-5) var(--space-5) var(--space-4);
  }

  .footer-inner {
    gap: var(--space-4);
  }

  .footer-brand {
    font-size: var(--text-h5);
  }

  .footer-links {
    display: flex;
    flex-direction: column;
    gap: var(--space-2);
    width: 100%;
    padding-bottom: var(--space-3);
  }

  .footer-bottom {
    padding-top: var(--space-3);
    gap: var(--space-2);
  }

  .acknowledgement {
    padding-top: var(--space-2);
  }
}