/* ═══════════════════════════════════════════════
   header.css — Sticky site header
   ═══════════════════════════════════════════════ */

.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--header-height);
  background: var(--color-ink-blue);
  z-index: 1000;
  box-shadow: 0 2px 12px rgba(27,58,107,0.25);
}

.header-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 clamp(1rem, 4vw, 3rem);
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
}

/* Logo */
.site-logo {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  text-decoration: none;
  flex-shrink: 0;
}

.site-logo img {
  width: 36px;
  height: 36px;
  transition: transform var(--transition-normal), filter var(--transition-normal);
  border-radius: 50%;
}

.site-logo:hover img {
  transform: scale(1.08);
  filter: drop-shadow(0 0 6px rgba(245,200,66,.6));
}

.site-logo-text {
  font-family: 'Inter', system-ui, sans-serif;
  font-weight: 700;
  font-size: 0.95rem;
  color: var(--color-white);
  line-height: 1.2;
  max-width: 160px;
}

.site-logo-text span {
  display: block;
  font-weight: 400;
  font-size: 0.75rem;
  color: rgba(255,255,255,0.65);
}

/* Nav */
.site-nav {
  display: flex;
  align-items: center;
  gap: 0.25rem;
  list-style: none;
  padding: 0;
  margin: 0;
}

.site-nav a {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.45rem 0.85rem;
  border-radius: var(--radius-sm);
  color: rgba(255,255,255,0.8);
  text-decoration: none;
  font-size: 0.875rem;
  font-weight: 500;
  transition: all var(--transition-fast);
  white-space: nowrap;
}

.site-nav a:hover {
  background: rgba(255,255,255,0.12);
  color: var(--color-white);
}

.site-nav a.active,
.site-nav a[aria-current="page"] {
  background: rgba(245,200,66,0.2);
  color: var(--color-yellow-sunny);
  font-weight: 600;
}

.site-nav svg {
  width: 16px;
  height: 16px;
  flex-shrink: 0;
}

/* Hamburger */
.nav-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0.5rem;
  color: var(--color-white);
  border-radius: var(--radius-sm);
  transition: background var(--transition-fast);
}

.nav-toggle:hover { background: rgba(255,255,255,0.12); }

.nav-toggle svg { display: block; }

/* Mobile nav */
@media (max-width: 768px) {
  .nav-toggle { display: flex; align-items: center; justify-content: center; }

  .site-nav {
    position: fixed;
    top: var(--header-height);
    left: 0; right: 0;
    background: var(--color-ink-blue);
    flex-direction: column;
    align-items: stretch;
    padding: 1rem;
    gap: 0.25rem;
    box-shadow: var(--shadow-lg);
    border-top: 1px solid rgba(255,255,255,0.1);
    transform: translateY(-110%);
    opacity: 0;
    transition: transform var(--transition-normal), opacity var(--transition-normal);
    pointer-events: none;
  }

  .site-nav.open {
    transform: translateY(0);
    opacity: 1;
    pointer-events: all;
  }

  .site-nav a {
    padding: 0.75rem 1rem;
    font-size: 1rem;
  }
}