.header {
  width: 100%;
  height: 60px;
  background-color: var(--bg);
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.30),
              0 4px 8px rgba(0, 0, 0, 0.15);
  position: sticky;
  top: 0;
  z-index: 1000;
  padding: var(--space-12) var(--section-padding-horizontal);
}

.header-container {
  width: 100%;
  height: 100%;
  max-width: var(--section-max-width);
  margin: 0;
  gap: var(--space-12);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.nav ul {
  list-style: none;
  display: flex;
  gap: var(--space-20);
  margin: 0;
  padding: 0;
}

.nav li {
  position: relative;
}

.btn-nav{
  font-size: var(--text-16);
  font-weight: 500;

  border-radius: var(--radius-small);
  min-width: 160px;
  min-height: 40px;
}

.menu-toggle {
  display: none;
}

@media (max-width: 768px) {
  /* show/hide the hamburger only on mobile */
  .menu-toggle {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    background: transparent;
    border: none;
    padding: var(--space-8);
    font-size: 1.5rem;         /* icon size — adjust to taste */
    color: var(--text);
    cursor: pointer;
  }

  /* header adjustments */
  .header {
    height: auto; /* you already added this — keep it */
    padding: calc(var(--space-4) + env(safe-area-inset-top)) var(--section-padding-horizontal);
    backdrop-filter: blur(6px); /* optional: subtle depth */
    -webkit-backdrop-filter: blur(6px);
  }

  /* compact header layout: single row with controls */
  .header-container {
    flex-direction: row;       /* keep the top bar compact */
    align-items: center;
    gap: var(--space-12);
    padding: 0;
  }

  /* nav hidden by default on mobile; it becomes visible when header gets .header--open */
  .nav {
    width: 100%;
    display: none;
    margin-top: var(--space-12);
    background: transparent;
  }

  /* expanded state (toggled via JS by adding .header--open) */
  .header--open .nav {
    display: block;
  }

  /* stack nav links and make them easy to tap */
  .nav ul {
    flex-direction: column;
    gap: var(--space-8);
    padding: 0;
    margin: 0;
    width: 100%;
  }

  .nav .link {
    display: block;
    width: 100%;
    padding: calc(var(--space-8) + 2px) 0;
    font-size: var(--text-16);
    color: var(--text);
  }

  /* primary CTA in header: keep visible in top row; optionally full width when nav is open */
  .btn-nav {
    min-width: 0;
    min-height: 44px;
    padding: 0 var(--space-16);
    white-space: nowrap;
    order: 2; /* ensure it stays on the right in the top row */
  }

  /* when menu is open, optionally show CTA full width below nav (uncomment if you want this) */
  /*
  .header--open .btn-nav {
    display: block;
    width: 100%;
    margin-top: var(--space-12);
  }
  */

  /* simple focus / hit-area improvements */
  .menu-toggle:focus-visible,
  .btn-nav:focus-visible,
  .nav .link:focus-visible {
    outline: 2px solid var(--primary);
    outline-offset: 2px;
  }
}