/* Navbar — sits over the hero on dark surfaces.
   Default styles target mobile (per Figma frame 305:4790);
   tablet/desktop scale up.

   Horizontal padding + max-width cap live in layout.css via
   the `.tlm-section` (root) and `.tlm-container` (__inner)
   classes added to the HTML. Buttons live in buttons.css.
   This file owns only navbar-unique layout. */

.tlm-navbar {
  background-color: transparent;
  box-shadow: var(--shadow-sm);
  /* Mobile load state: 32px padding + 66px logo for a prominent
     hero-overlay nav. Shrinks to --space-md + 48px logo when
     .tlm-navbar--solid is added on scroll (see below). */
  padding-block: var(--space-lg);
  border-bottom: 1px solid rgba(255, 255, 255, 0.12);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  /* Smooth transitions when JS toggles --solid: bg + border +
     shadow for the colour swap; padding-block for the height
     shrink. Logo height transitions on the logo element itself. */
  transition: background-color 300ms ease, border-color 300ms ease,
              box-shadow 300ms ease, padding-block 250ms ease;
}

/* Solid state: cream surface, dark text, subtle drop shadow. This is
   the COLOUR state only. On service pages --solid is pinned on from
   the top (data-pin-solid) so the chrome stays cream; the SIZE shrink
   must NOT key off --solid there, or the navbar is always compact.
   Size shrink lives on .tlm-navbar--compact below. */
.tlm-navbar--solid {
  background-color: var(--color-cream);
  border-bottom-color: rgba(0, 0, 0, 0.08);
  box-shadow: 0 2px 8px 0 rgba(0, 0, 0, 0.06);
}

/* Compact (size shrink) — reclaims vertical space once the page has
   actually scrolled. Fires on the real scroll-state class for either
   page type: --solid on normal pages, --scrolled on pinned-solid
   service pages. The :not([data-pin-solid]) guard stops the pinned
   --solid (colour only) from shrinking service navbars at the top. */
.tlm-navbar--scrolled,
.tlm-navbar--solid:not([data-pin-solid]) {
  padding-block: var(--space-md);
}

.tlm-navbar__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-sm);
}

.tlm-navbar__logo-link {
  display: inline-flex;
  flex-shrink: 0;
}

.tlm-navbar__logo {
  display: block;
  /* Mobile load state: 66px. Shrinks to 48px when .tlm-navbar--solid
     is applied on scroll (see below). Desktop stays at 64px in both
     states. Height transition keeps the shrink smooth. */
  height: 66px;
  width: auto;
  transition: opacity 300ms ease, height 250ms ease;
}

/* Compact state shrinks the logo on mobile (paired with the padding
   shrink above). Keyed to the scroll-state classes, not --solid, so
   pinned-solid service navbars stay full-size at the top. Desktop
   overrides this back below. */
.tlm-navbar--scrolled .tlm-navbar__logo,
.tlm-navbar--solid:not([data-pin-solid]) .tlm-navbar__logo {
  height: 48px;
}

/* Two stacked logos in the same link, crossfaded by state.
   Dark (navy) version hidden by default; revealed when navbar is solid. */
.tlm-navbar__logo--dark {
  position: absolute;
  inset: 0;
  opacity: 0;
}

.tlm-navbar__logo-link {
  position: relative;
}

.tlm-navbar--solid .tlm-navbar__logo--light {
  opacity: 0;
}

.tlm-navbar--solid .tlm-navbar__logo--dark {
  opacity: 1;
}

/* Centre nav — hidden on mobile, revealed at desktop */
.tlm-navbar__nav {
  display: none;
}

.tlm-navbar__list {
  display: flex;
  align-items: center;
  gap: var(--space-lg);
  margin: 0;
  padding: 0;
  list-style: none;
}

.tlm-navbar__link {
  /* Mega-menu triggers are <button>; reset UA styling to match the old <a>. */
  appearance: none;
  background: none;
  border: 0;
  padding: 0;
  margin: 0;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: var(--space-2xs);
  font-family: var(--font-sans);
  font-size: var(--text-sm);
  font-weight: var(--weight-bold);
  line-height: var(--leading-normal);
  letter-spacing: var(--tracking-button);
  text-transform: uppercase;
  color: var(--color-text-on-dark);
  text-decoration: none;
  transition: opacity 150ms ease, color 300ms ease;
}

.tlm-navbar--solid .tlm-navbar__link {
  color: var(--color-text-on-light);
}

.tlm-navbar__link:hover {
  opacity: 0.7;
}

.tlm-navbar__link:focus-visible {
  outline: 2px solid var(--color-text-on-dark);
  outline-offset: 4px;
  border-radius: var(--radius-sm);
}

.tlm-navbar__chevron {
  display: block;
  flex-shrink: 0;
}

/* CTA — hidden on mobile, revealed at desktop (matches Figma — no CTA on mobile navbar).
   Initial state: ghost outline (from buttons.css).
   Solid state: fills to navy pill, white text. Transition handled by
   the .tlm-button base transition rule. */
.tlm-navbar__cta {
  display: none;
}

.tlm-navbar--solid .tlm-navbar__cta {
  background-color: var(--color-navy);
  color: var(--color-text-on-dark);
  border-color: var(--color-navy);
}

.tlm-navbar--solid .tlm-navbar__cta:hover {
  background-color: var(--color-navy);
  color: var(--color-text-on-dark);
  /* Match the .tlm-button--primary-on-light:hover lift — the solid-state
     overrides above suppress the variant's own hover styles, so re-add
     the shadow here. */
  box-shadow: var(--shadow-button-hover);
  opacity: 0.88;
}

/* Mobile menu toggle — Material-style three-line menu, 40×40 per Figma. */
.tlm-navbar__toggle {
  display: inline-flex;
  flex-direction: column;
  justify-content: center;
  gap: 6px;    /* hamburger bar spacing — icon construction within 40x40, not layout spacing */
  width: 40px;
  height: 40px;
  padding: 0;
  background: transparent;
  border: 0;
  cursor: pointer;
}

.tlm-navbar__toggle-bar {
  display: block;
  width: 28px;
  height: 3px;
  margin-inline: auto;
  background-color: var(--color-text-on-dark);
  border-radius: var(--radius-pill);
  /* Colour snaps instantly: animating background-color over 300ms made
     the open X (dark, over the light drawer) fade back to light when
     the drawer closes, which read as a navy flash over the homepage
     dark hero during the next-page load. Only transform/opacity (the
     X morph) animate. */
  transition: transform 200ms ease, opacity 200ms ease;
}

.tlm-navbar--solid .tlm-navbar__toggle-bar {
  background-color: var(--color-text-on-light);
}

.tlm-navbar__toggle:focus-visible {
  outline: 2px solid var(--color-text-on-dark);
  outline-offset: 4px;
  border-radius: var(--radius-sm);
}

.tlm-navbar__toggle:hover .tlm-navbar__toggle-bar {
  opacity: 0.7;
}

/* ============================================
 * --on-light modifier
 * Transparent state, dark chrome. For pages with a light hero
 * (e.g. blog single). The .tlm-navbar--solid scroll state still
 * wins because its rules are declared later in source order.
 * ============================================ */

/* :not(--solid) guards keep these from leaking into the scrolled
   solid state (which sits earlier in this file so loses on source
   order otherwise). Result: --on-light applies only when transparent. */
.tlm-navbar--on-light:not(.tlm-navbar--solid) .tlm-navbar__logo--light {
  opacity: 0;
}
.tlm-navbar--on-light:not(.tlm-navbar--solid) .tlm-navbar__logo--dark {
  opacity: 1;
}
.tlm-navbar--on-light:not(.tlm-navbar--solid) .tlm-navbar__link {
  color: var(--color-text-on-light);
}
.tlm-navbar--on-light:not(.tlm-navbar--solid) .tlm-navbar__toggle-bar {
  background-color: var(--color-text-on-light);
}
.tlm-navbar--on-light:not(.tlm-navbar--solid) .tlm-navbar__cta {
  /* Ghost-on-light look: navy outline + navy text, no fill. */
  background-color: transparent;
  color: var(--color-navy);
  border-color: var(--color-navy);
}

/* Open-state hamburger morphs into an X.
   Top bar rotates 45° + slides 9px down, middle fades,
   bottom rotates -45° + slides 9px up. Bars converge at centre. */
.tlm-navbar__toggle[aria-expanded="true"] .tlm-navbar__toggle-bar {
  background-color: var(--color-text-on-light);
}
.tlm-navbar__toggle[aria-expanded="true"] .tlm-navbar__toggle-bar:nth-child(1) {
  transform: translateY(9px) rotate(45deg);
}
.tlm-navbar__toggle[aria-expanded="true"] .tlm-navbar__toggle-bar:nth-child(2) {
  opacity: 0;
}
.tlm-navbar__toggle[aria-expanded="true"] .tlm-navbar__toggle-bar:nth-child(3) {
  transform: translateY(-9px) rotate(-45deg);
}

/* ============================================
 * Mobile drawer — full-screen overlay
 * Hidden by default; .is-open + body[data-drawer-open]
 * paired by the inline drawer JS in preview.html.
 * Hidden entirely ≥1024px (desktop has the centre nav).
 * Matches Figma node 328:2579.
 * ============================================ */
.tlm-navbar__drawer {
  position: fixed;
  inset: 0;
  z-index: 100;
  display: flex;
  flex-direction: column;
  background-color: var(--color-white);
  /* Top padding is 0 so the drawer header's padding-block matches the
     navbar's exactly — drawer logo lands at the same x/y as the
     navbar logo when toggling. Sides + bottom keep section-mobile padding. */
  padding: 0 var(--space-section-x-mobile) var(--space-xl);
  overflow-y: auto;
  /* Closed state — fade only, no transform, so the logo stays
     pixel-locked to the navbar's logo during the toggle. */
  opacity: 0;
  visibility: hidden;
  transition: opacity 180ms ease, visibility 0s linear 180ms;
}

.tlm-navbar__drawer.is-open {
  opacity: 1;
  visibility: visible;
  transition: opacity 180ms ease, visibility 0s;
}

.tlm-navbar__drawer-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  /* Match .tlm-navbar padding-block (mobile = --space-md) so logo +
     close X align exactly with the closed-state navbar logo + hamburger. */
  padding-block: var(--space-md);
  border-bottom: 1px solid var(--color-border-card);
  margin-bottom: var(--space-lg);
}

.tlm-navbar__drawer-logo-link {
  display: inline-flex;
  flex-shrink: 0;
}

.tlm-navbar__drawer-logo {
  display: block;
  /* Match .tlm-navbar__logo height (mobile = 48px) so the logo
     doesn't change size when the drawer opens. */
  height: 48px;
  width: auto;
}

.tlm-navbar__drawer-close {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  padding: 0;
  background: transparent;
  border: 0;
  color: var(--color-text-on-light);
  cursor: pointer;
  border-radius: var(--radius-sm);
  transition: opacity 150ms ease;
}

.tlm-navbar__drawer-close:hover {
  opacity: 0.7;
}

.tlm-navbar__drawer-close:focus-visible {
  outline: 2px solid var(--color-text-on-light);
  outline-offset: 2px;
}

.tlm-navbar__drawer-nav {
  flex: 1;
}

.tlm-navbar__drawer-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-lg);
  margin: 0;
  padding: 0;
  list-style: none;
}

.tlm-navbar__drawer-item {
  border-bottom: 1px solid var(--color-border-card);
  padding-bottom: var(--space-lg);
}

.tlm-navbar__drawer-item:last-child {
  border-bottom: 0;
}

.tlm-navbar__drawer-link {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-xs, 8px);
  width: 100%;
  padding: 0;
  font-family: var(--font-serif);
  font-size: var(--text-h2-mobile);
  font-weight: var(--weight-regular);
  line-height: var(--leading-tight);
  letter-spacing: var(--tracking-display);
  color: var(--color-text-on-light);
  text-decoration: none;
  background: transparent;
  border: 0;
  cursor: pointer;
  text-align: left;
}

.tlm-navbar__drawer-link:hover {
  opacity: 0.7;
}

.tlm-navbar__drawer-link:focus-visible {
  outline: 2px solid var(--color-text-on-light);
  outline-offset: 4px;
  border-radius: var(--radius-sm);
}

.tlm-navbar__drawer-chevron {
  flex-shrink: 0;
  transition: transform 200ms ease;
}

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

.tlm-navbar__drawer-sublist {
  display: flex;
  flex-direction: column;
  margin: var(--space-md) 0 0;
  padding: 0;
  list-style: none;
}

.tlm-navbar__drawer-sublist[hidden] {
  display: none;
}

.tlm-navbar__drawer-subitem {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  padding-block: var(--space-md);
  border-top: 1px solid var(--color-border-card);
  color: var(--color-text-on-light);
  text-decoration: none;
}

/* Last sub-item: no border-bottom — the parent section's own
   border-bottom acts as the section divider. Avoids a double line. */
.tlm-navbar__drawer-sublist > li:last-child .tlm-navbar__drawer-subitem {
  border-bottom: 0;
}

/* When the accordion is open, drop the parent section's padding-bottom
   so the last sub-item sits flush against the section divider. */
.tlm-navbar__drawer-item--has-children:has(.tlm-navbar__drawer-toggle[aria-expanded="true"]) {
  padding-bottom: 0;
}

.tlm-navbar__drawer-subitem:hover {
  opacity: 0.7;
}

.tlm-navbar__drawer-subitem:focus-visible {
  outline: 2px solid var(--color-text-on-light);
  outline-offset: 2px;
  border-radius: var(--radius-sm);
}

.tlm-navbar__drawer-subicon {
  flex-shrink: 0;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  border-radius: var(--radius-pill);
  background-color: var(--color-grey-100);
}

.tlm-navbar__drawer-subitem--plain .tlm-navbar__drawer-sublabel {
  padding-inline-start: var(--space-sm);
}

/* Group sub-headings inside the merged Services accordion
   (Engagements / Capabilities). Small uppercase label, no link. */
.tlm-navbar__drawer-subheading {
  padding-block: var(--space-md) var(--space-sm);
  padding-inline-start: var(--space-sm);
  font-family: var(--font-sans);
  font-size: var(--text-sm);
  font-weight: var(--weight-bold);
  line-height: var(--leading-relaxed);
  letter-spacing: var(--tracking-button);
  text-transform: uppercase;
  color: var(--color-text-on-light);
  opacity: 0.55;
}

/* The first sub-item after a sub-heading drops its top border so the
   heading reads as the group label rather than a list row. */
.tlm-navbar__drawer-subheading + li .tlm-navbar__drawer-subitem {
  border-top: 0;
}

/* A sub-heading that follows a sub-item group (i.e. Capabilities,
   after the Engagements group) gets a top border to divide the two. */
li:has(> .tlm-navbar__drawer-subitem) + .tlm-navbar__drawer-subheading {
  margin-top: var(--space-sm);
  border-top: 1px solid var(--color-border-card);
}

.tlm-navbar__drawer-sublabel {
  flex: 1;
  font-family: var(--font-serif);
  font-size: var(--text-h5-mobile);
  font-weight: var(--weight-regular);
  line-height: var(--leading-tight);
  letter-spacing: var(--tracking-display);
  color: var(--color-text-on-light);
}

.tlm-navbar__drawer-subchevron {
  flex-shrink: 0;
}

/* Drawer CTA — outlined navy pill on white surface.
   FLAG: candidate for new --ghost-on-light shared button variant
   (mirrors existing --ghost-on-dark). Kept local for now. */
.tlm-navbar__drawer-cta {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  margin-top: var(--space-xl);
  padding: 18px var(--space-xl);
  font-family: var(--font-sans);
  font-size: var(--text-base);
  font-weight: var(--weight-bold);
  line-height: var(--leading-normal);
  letter-spacing: var(--tracking-button);
  text-transform: uppercase;
  text-decoration: none;
  color: var(--color-text-on-dark);
  background-color: var(--color-navy);
  border: 1px solid var(--color-navy);
  border-radius: var(--radius-pill);
  transition: background-color 150ms ease, color 150ms ease, opacity 150ms ease;
}

.tlm-navbar__drawer-cta:hover {
  opacity: 0.9;
}

.tlm-navbar__drawer-cta:focus-visible {
  outline: 2px solid var(--color-navy);
  outline-offset: 4px;
}

/* Body lock — applied by JS when the drawer opens.
   Prevents background scroll while still allowing the
   drawer itself to scroll internally on short screens. */
body[data-drawer-open] {
  overflow: hidden;
}

/* Desktop — full layout, hide hamburger, show centre nav + CTA. */
@media (min-width: 1024px) {
  /* Desktop shrinks on scroll too: the default (top-of-page) state
     keeps the original tall size (--space-lg padding + 64px logo);
     the compact scroll state drops to 20px + 56px. Keyed to the
     scroll-state classes (not --solid) so pinned-solid service
     navbars also start tall and only shrink once scrolled. */
  .tlm-navbar--scrolled,
  .tlm-navbar--solid:not([data-pin-solid]) {
    padding-block: 20px;
  }

  .tlm-navbar--scrolled .tlm-navbar__logo,
  .tlm-navbar--solid:not([data-pin-solid]) .tlm-navbar__logo {
    height: 56px;
  }

  .tlm-navbar__inner {
    height: auto;
  }

  .tlm-navbar__logo {
    height: 64px;
  }

  .tlm-navbar__nav {
    display: block;
  }

  .tlm-navbar__cta {
    display: inline-flex;
  }

  .tlm-navbar__toggle,
  .tlm-navbar__drawer {
    display: none;
  }
}