/* ==========================================================================
   Pathway IT — header.css
   Sticky, transparent-over-hero header that becomes solid + blurred on scroll.
   Markup is rendered by js/render.js into #site-header.
   ========================================================================== */

.site-header {
  position: fixed; inset: 0 0 auto 0; z-index: 1000;
  height: var(--header-h);
  display: flex; align-items: center;
  transition: background var(--t) var(--ease), box-shadow var(--t) var(--ease),
              backdrop-filter var(--t) var(--ease), border-color var(--t) var(--ease);
  border-bottom: 1px solid transparent;
}
/* Three tracks so the nav is centred against the header itself. Centring it
   with `margin-inline: auto` would only centre it in the space left over
   between the logo and the CTA, which are not the same width. */
.site-header .container {
  display: grid; grid-template-columns: 1fr auto 1fr;
  align-items: center; gap: 1.4rem;
  width: 100%; max-width: var(--container-wide);
}

/* Solid state after scrolling past hero */
.site-header.is-solid {
  background: color-mix(in srgb, var(--paper) 82%, transparent);
  backdrop-filter: saturate(180%) blur(14px);
  -webkit-backdrop-filter: saturate(180%) blur(14px);
  box-shadow: 0 6px 24px rgba(6, 12, 32, .07);
  border-bottom-color: var(--line);
}

/* Brand / logo */
.brand { grid-column: 1; justify-self: start; display: inline-flex; align-items: center; flex: none; line-height: 0; }
.brand-logo { display: block; width: auto; height: 46px; }
.brand-logo--on-light { display: none; }
.site-header.is-solid .brand-logo--on-dark { display: none; }
.site-header.is-solid .brand-logo--on-light { display: block; }

/* Primary nav */
.nav { grid-column: 2; display: flex; align-items: center; gap: .3rem; }
.nav-link {
  position: relative; display: inline-flex; align-items: center; gap: .35rem;
  padding: .6rem .85rem; border-radius: var(--r-pill);
  /* Two-word items such as "Case Studies" must never break across lines. */
  white-space: nowrap; flex: none;
  font-size: .93rem; font-weight: 500; color: rgba(255, 255, 255, .82);
  transition: color var(--t) var(--ease), background var(--t) var(--ease);
}
.nav-link:hover { color: #fff; background: rgba(255, 255, 255, .08); }
.site-header.is-solid .nav-link { color: var(--slate-600); }
.site-header.is-solid .nav-link:hover { color: var(--indigo); background: var(--indigo-50); }
.nav-link[aria-current="page"] { color: #fff; }
.site-header.is-solid .nav-link[aria-current="page"] { color: var(--indigo); }
.nav-link .chev { width: 14px; height: 14px; transition: transform var(--t) var(--ease); }

/* Dropdown (Services) */
.nav-item { position: relative; }
.nav-menu {
  position: absolute; top: calc(100% + 10px); left: 50%; transform: translateX(-50%) translateY(6px);
  min-width: 340px; padding: .6rem; border-radius: var(--r-lg);
  background: var(--paper); border: 1px solid var(--line); box-shadow: var(--sh-lg);
  opacity: 0; visibility: hidden; transition: opacity .2s var(--ease), transform .2s var(--ease), visibility .2s;
}
.nav-item:hover .nav-menu,
.nav-item:focus-within .nav-menu { opacity: 1; visibility: visible; transform: translateX(-50%) translateY(0); }
.nav-item:hover .chev, .nav-item:focus-within .chev { transform: rotate(180deg); }
.nav-menu a {
  display: flex; gap: .75rem; align-items: flex-start;
  padding: .7rem .8rem; border-radius: 12px; transition: background var(--t) var(--ease);
}
.nav-menu a:hover { background: var(--paper-2); }
.nav-menu .mi-ico { display: grid; place-items: center; width: 36px; height: 36px; border-radius: 10px; background: var(--indigo-50); color: var(--indigo); flex: none; }
.nav-menu .mi-ico svg { width: 18px; height: 18px; }
.nav-menu .mi-text { display: flex; flex-direction: column; gap: .1rem; min-width: 0; }
.nav-menu .mi-t { display: block; font-weight: 600; color: var(--slate-900); font-size: .92rem; line-height: 1.3; }
.nav-menu .mi-d { display: block; font-size: .8rem; line-height: 1.4; color: var(--slate-500); }

/* Two-column panel — keeps long lists (Industries) from running off-screen */
.nav-menu--grid {
  display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: .1rem;
  min-width: 490px; max-width: min(560px, calc(100vw - 2rem));
}
.nav-menu--grid a { align-items: center; padding: .55rem .7rem; }
.nav-menu--grid .mi-ico { width: 32px; height: 32px; border-radius: 9px; }
.nav-menu--grid .mi-ico svg { width: 16px; height: 16px; }

/* Header CTA + burger — same track, only one is ever visible */
.header-cta, .burger { grid-column: 3; justify-self: end; }
.burger {
  display: none; width: 44px; height: 44px;
  border-radius: 12px; border: 1px solid rgba(255, 255, 255, .25);
  align-items: center; justify-content: center; color: #fff;
  transition: background var(--t) var(--ease), border-color var(--t) var(--ease);
}
.site-header.is-solid .burger { color: var(--slate-900); border-color: var(--line); }
.burger:hover { background: rgba(127, 127, 127, .12); }
.burger span { position: relative; width: 20px; height: 2px; background: currentColor; border-radius: 2px; transition: transform var(--t) var(--ease), opacity var(--t) var(--ease); }
.burger span::before, .burger span::after { content: ""; position: absolute; left: 0; width: 20px; height: 2px; background: currentColor; border-radius: 2px; transition: transform var(--t) var(--ease); }
.burger span::before { top: -6px; }
.burger span::after { top: 6px; }
body.menu-open .burger span { background: transparent; }
body.menu-open .burger span::before { transform: translateY(6px) rotate(45deg); }
body.menu-open .burger span::after { transform: translateY(-6px) rotate(-45deg); }

/* Mobile panel */
.mobile-panel {
  position: fixed; inset: var(--header-h) 0 0 0; z-index: 990;
  background: var(--grad-dark); color: #eaf0ff;
  padding: 1.5rem var(--gutter) 2.5rem;
  transform: translateX(100%); transition: transform var(--t) var(--ease);
  overflow-y: auto; display: flex; flex-direction: column; gap: .3rem;
}
body.menu-open .mobile-panel { transform: translateX(0); }
.mobile-panel a { padding: .95rem .4rem; font-size: 1.15rem; font-weight: 600; border-bottom: 1px solid rgba(255, 255, 255, .08); }
.mobile-panel a:hover { color: var(--sky); }
.mobile-panel .mp-group { font-family: var(--font-mono); font-size: .72rem; letter-spacing: .16em; text-transform: uppercase; color: var(--indigo-400); margin-top: 1.2rem; padding-left: .4rem; }
.mobile-panel .btn { margin-top: 1.6rem; }

/* Backdrop */
.nav-backdrop { position: fixed; inset: 0; z-index: 980; background: rgba(5, 7, 15, .5); opacity: 0; visibility: hidden; transition: opacity var(--t) var(--ease), visibility var(--t); }
body.menu-open .nav-backdrop { opacity: 1; visibility: visible; }

/* Nine no-wrap items plus the CTA are tight just above the burger breakpoint,
   so tighten the spacing rather than let the CTA run off the edge. */
@media (min-width: 1141px) and (max-width: 1379px) {
  .site-header .container { gap: 1rem; }
  .nav { gap: 0; }
  .nav-link { padding: .6rem .5rem; font-size: .86rem; }
}

/* Breakpoint: collapse to burger */
@media (max-width: 1140px) {
  .nav, .header-cta { display: none; }
  .burger { display: inline-flex; }
}
@media (min-width: 1141px) { .mobile-panel, .nav-backdrop { display: none; } }