/* ══════════════════════════════
   HEADER
   ══════════════════════════════ */

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255,255,255,.92);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid transparent;
  transition:
    border-color var(--transition-slow),
    box-shadow   var(--transition-slow),
    background   var(--transition-slow);
}

.site-header.is-scrolled {
  background: rgba(255,255,255,.97);
  border-color: var(--color-border-soft);
  box-shadow: 0 4px 32px rgba(15,31,92,.08);
}

.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
  padding: .9rem 0;
}

/* ── Logo ── */
.site-brand {
  flex-shrink: 0;
}
.site-brand img {
  width: auto;
  height: 52px;
  transition: opacity var(--transition);
}
.site-brand:hover img { opacity: .85; }

/* ══════════════════════════════
   NAV LINKS
   ══════════════════════════════ */

.site-nav ul {
  	display: flex;
  	align-items: center;
  	gap: .15rem;
  	list-style: none;
	padding: 0;
}

.site-nav a {
  position: relative;
  display: inline-block;
  font-weight: 600;
  font-size: .94rem;
  color: var(--color-text-soft);
  padding: .5rem .9rem;
  border-radius: 8px;
  transition: color var(--transition), background var(--transition);
  overflow: hidden;
}

/* Hover fill background */
.site-nav a::before {
  content: '';
  position: absolute;
  inset: 0;
  background: var(--color-bg-alt);
  border-radius: 8px;
  transform: scaleX(0);
  transform-origin: left;
  transition: transform .2s cubic-bezier(.22,1,.36,1);
  z-index: -1;
}
.site-nav a:hover::before { transform: scaleX(1); }
.site-nav a:hover { color: var(--color-primary); }

/* Active underline */
.site-nav a.is-active {
  color: var(--color-primary);
  font-weight: 700;
}
.site-nav a.is-active::after {
  content: '';
  position: absolute;
  left: .9rem;
  right: .9rem;
  bottom: .25rem;
  height: 2px;
  border-radius: 2px;
  background: var(--color-accent);
  animation: line-grow .3s cubic-bezier(.22,1,.36,1) both;
}

/* CTA pill — last nav item */
.site-nav li:last-child a {
  background: var(--color-accent);
  color: #fff;
  font-weight: 700;
  padding: .55rem 1.25rem;
  border-radius: 999px;
  box-shadow: 0 2px 12px rgba(232,160,32,.3);
  transition:
    background var(--transition),
    box-shadow  var(--transition),
    transform   var(--transition);
}
.site-nav li:last-child a::before { display: none; }
.site-nav li:last-child a::after  { display: none; }
.site-nav li:last-child a:hover {
  background: var(--color-accent-dark);
  color: #fff;
  box-shadow: 0 4px 20px rgba(232,160,32,.45);
  transform: translateY(-1px);
}

/* ══════════════════════════════
   HAMBURGER
   ══════════════════════════════ */

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: 1px solid var(--color-border);
  border-radius: 8px;
  padding: .55rem .6rem;
  cursor: pointer;
  transition: border-color var(--transition);
}
.nav-toggle:hover { border-color: var(--color-primary); }

.nav-toggle span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--color-primary);
  border-radius: 2px;
  transition: transform .25s ease, opacity .25s ease, width .25s ease;
}

/* X state when open */
.nav-toggle[aria-expanded="true"] span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] span:nth-child(2) { opacity: 0; width: 0; }
.nav-toggle[aria-expanded="true"] span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ══════════════════════════════
   MOBILE
   ══════════════════════════════ */

@media (max-width: 900px) {
  .nav-toggle { display: flex; }

  .site-nav {
    position: absolute;
    left: 0; right: 0;
    top: 100%;
    background: #fff;
    border-bottom: 1px solid var(--color-border-soft);
    padding: 1.25rem 1.5rem 1.75rem;
    display: none;
    box-shadow: 0 12px 32px rgba(15,31,92,.1);
    animation: fade-up .25s cubic-bezier(.22,1,.36,1) both;
  }
  .site-nav.is-open { display: block; }

  .site-nav ul {
    flex-direction: column;
    align-items: stretch;
    gap: .25rem;
  }

  .site-nav a {
    display: block;
    padding: .7rem 1rem;
  }

  .site-nav li:last-child {
    margin-top: .5rem;
  }
  .site-nav li:last-child a {
    display: block;
    text-align: center;
  }
}