/* =========================================================
   Header / Navigation
   ========================================================= */

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  height: var(--header-h);
  display: flex;
  align-items: center;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: saturate(160%) blur(8px);
  border-bottom: 1px solid var(--hairline);
  transition: box-shadow var(--dur-fast) var(--ease), border-color var(--dur-fast) var(--ease);
}

.site-header.is-scrolled {
  box-shadow: 0 6px 24px -14px rgba(28, 22, 20, 0.25);
  border-color: transparent;
}

.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
}

/* Logo sits at the visual right edge, natural in RTL row order */
.brand {
  display: flex;
  align-items: center;
  flex-shrink: 0;
}

.brand img {
  height: 40px;
  width: auto;
}

.main-nav {
  display: flex;
  align-items: center;
  gap: clamp(1.1rem, 2vw, 2rem);
}

.main-nav a {
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--ink-soft);
  position: relative;
  padding-block: 0.3rem;
  transition: color var(--dur-fast) var(--ease);
}

.main-nav a::after {
  content: "";
  position: absolute;
  inset-inline-start: 0;
  bottom: 0;
  height: 2px;
  width: 0;
  background: var(--red);
  transition: width var(--dur-fast) var(--ease);
}

.main-nav a:hover {
  color: var(--ink);
}
.main-nav a:hover::after {
  width: 100%;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 0.85rem;
}

.header-actions .btn--primary {
  padding: 0.65rem 1.35rem;
  font-size: 0.9rem;
}

/* Mobile hamburger */
.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 5px;
  width: 42px;
  height: 42px;
  border-radius: var(--radius);
}

.nav-toggle span {
  width: 22px;
  height: 2px;
  background: var(--ink);
  transition: transform var(--dur-fast) var(--ease), opacity var(--dur-fast) var(--ease);
}

.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; }
.nav-toggle[aria-expanded="true"] span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

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

  .main-nav {
    position: fixed;
    inset-inline-end: 0;
    top: var(--header-h);
    height: calc(100dvh - var(--header-h));
    width: min(78vw, 320px);
    background: var(--paper);
    flex-direction: column;
    align-items: stretch;
    justify-content: flex-start;
    gap: 0;
    padding: 1.5rem var(--gutter);
    border-inline-start: 1px solid var(--hairline);
    transform: translateX(100%);
    transition: transform var(--dur-med) var(--ease);
  }
  html[dir="rtl"] .main-nav { transform: translateX(-100%); }

  .main-nav.is-open { transform: translateX(0); }

  .main-nav a {
    padding-block: 0.9rem;
    border-bottom: 1px solid var(--hairline);
    font-size: 1.05rem;
  }

  .header-actions .btn--ghost { display: none; }
}

.nav-scrim {
  display: none;
  position: fixed;
  inset: var(--header-h) 0 0 0;
  background: rgba(28, 22, 20, 0.35);
  z-index: 90;
  opacity: 0;
  transition: opacity var(--dur-med) var(--ease);
}
.nav-scrim.is-visible {
  display: block;
  opacity: 1;
}