/* ── Header ── */
.header {
  position: fixed; top: 0; left: 0; right: 0; z-index: 100;
  height: var(--header-height);
  background: rgba(255,255,255,0.95);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-border);
  transition: box-shadow var(--transition);
}
.header.scrolled { box-shadow: var(--shadow-md); }
.header__inner {
  height: 100%;
  display: flex; align-items: center; justify-content: space-between;
  gap: var(--space-8);
}

/* ── Logo ── */
.header__logo { display: flex; align-items: center; gap: var(--space-2); flex-shrink: 0; }
.logo-text { font-size: var(--text-xl); font-weight: var(--font-extrabold); color: var(--color-primary); }
.logo-text strong { color: var(--color-accent); }

/* ── Nav ── */
.nav { flex: 1; }
.nav__list {
  display: flex; align-items: center; justify-content: center;
  gap: var(--space-1);
}
.nav__link {
  display: flex; align-items: center; gap: 4px;
  padding: var(--space-2) var(--space-3);
  font-size: var(--text-sm); font-weight: var(--font-medium);
  color: var(--color-text-muted);
  border-radius: var(--radius-sm);
  transition: all var(--transition);
  white-space: nowrap;
}
.nav__link:hover, .nav__link--active { color: var(--color-primary); background: var(--color-bg-alt); }

/* ── Dropdown ── */
.nav__item--dropdown { position: relative; }
.nav__dropdown {
  display: none;
  position: absolute; top: calc(100% + var(--space-2)); left: 0;
  background: white; border: 1px solid var(--color-border);
  border-radius: var(--radius-md); box-shadow: var(--shadow-lg);
  padding: var(--space-2); min-width: 220px; z-index: 200;
}
.nav__item--dropdown:hover .nav__dropdown { display: block; }
.nav__dropdown a {
  display: block; padding: var(--space-2) var(--space-4);
  font-size: var(--text-sm); color: var(--color-text-muted);
  border-radius: var(--radius-sm); transition: all var(--transition);
}
.nav__dropdown a:hover { background: var(--color-bg-alt); color: var(--color-primary); }

/* ── Header Actions ── */
.header__actions { display: flex; align-items: center; gap: var(--space-4); flex-shrink: 0; }

/* ── Lang Switcher ── */
.lang-switcher { display: flex; align-items: center; gap: var(--space-2); font-size: var(--text-sm); font-weight: var(--font-semibold); }
.lang-switcher a { color: var(--color-text-muted); transition: color var(--transition); padding: 2px 4px; border-radius: 4px; }
.lang-switcher a:hover, .lang-switcher a.active { color: var(--color-primary); }
.lang-sep { color: var(--color-border); }

/* ── Hamburger ── */
.hamburger {
  display: none;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 6px;
  width: 48px;
  height: 48px;
  min-width: 48px;
  padding: 0;
  background: none;
  border: none;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: background var(--transition);
  -webkit-tap-highlight-color: transparent;
  flex-shrink: 0;
}
.hamburger:hover { background: var(--color-bg-alt); }
.hamburger:focus-visible { outline: 2px solid var(--color-accent); outline-offset: 2px; }
.hamburger span {
  display: block;
  width: 26px;
  height: 3px;
  background: var(--color-text);
  border-radius: 3px;
  transition: all 0.3s ease;
  transform-origin: center;
}
.hamburger.open span:nth-child(1) { transform: translateY(9px) rotate(45deg); }
.hamburger.open span:nth-child(2) { opacity: 0; transform: scaleX(0); }
.hamburger.open span:nth-child(3) { transform: translateY(-9px) rotate(-45deg); }

/* ── Mobile Nav ── */
@media (max-width: 1024px) {
  /* backdrop-filter creates a containing block, trapping position:fixed children.
     Remove it on mobile so the nav overlay spans the full viewport. */
  .header { backdrop-filter: none; background: white; }

  .hamburger { display: flex; }
  .nav {
    display: none; position: fixed;
    top: 0; left: 0; right: 0;
    height: 100vh; height: 100dvh;
    padding-top: calc(var(--header-height) + var(--space-6));
    padding-left: var(--space-6); padding-right: var(--space-6); padding-bottom: var(--space-6);
    background: white; overflow-y: auto;
    z-index: 99;
  }
  .nav.open { display: block; }
  .nav__list { flex-direction: column; align-items: flex-start; gap: var(--space-1); }
  .nav__link { font-size: var(--text-xl); padding: var(--space-4) var(--space-3); width: 100%; }
  .nav__dropdown { display: none !important; }
}
@media (max-width: 640px) {
  .header__actions .btn { display: none; }
}
@media (max-width: 480px) {
  .header__inner { gap: var(--space-3); }
  .nav__link { font-size: var(--text-xl); padding: var(--space-4) var(--space-2); }
}

/* ── Footer ── */
.footer {
  background: var(--color-text);
  color: rgba(255,255,255,0.75);
  padding: var(--space-20) 0 var(--space-8);
}
.footer__grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: var(--space-12);
  margin-bottom: var(--space-16);
}
.footer__brand .logo-text { color: white; }
.footer__brand .logo-text strong { color: var(--color-accent); }
.footer__desc { margin-top: var(--space-4); font-size: var(--text-sm); line-height: 1.7; }
.footer__heading {
  font-size: var(--text-sm); font-weight: var(--font-semibold);
  color: white; margin-bottom: var(--space-4);
  text-transform: uppercase; letter-spacing: 0.05em;
}
.footer__links { display: flex; flex-direction: column; gap: var(--space-2); }
.footer__links a { font-size: var(--text-sm); transition: color var(--transition); }
.footer__links a:hover { color: white; }
.footer__contact p { font-size: var(--text-sm); margin-bottom: var(--space-2); }
.footer__bottom {
  border-top: 1px solid rgba(255,255,255,0.1);
  padding-top: var(--space-8);
  display: flex; justify-content: space-between; align-items: center;
  flex-wrap: wrap; gap: var(--space-4);
  font-size: var(--text-sm);
}
.footer__legal { display: flex; gap: var(--space-6); }
.footer__legal a:hover { color: white; }

@media (max-width: 1024px) { .footer__grid { grid-template-columns: 1fr 1fr; } }
@media (max-width: 640px) { .footer__grid { grid-template-columns: 1fr; } .footer__bottom { flex-direction: column; text-align: center; } }

/* ── Main offset for fixed header ── */
main { padding-top: var(--header-height); }
.page-hero { margin-top: calc(-1 * var(--header-height)); padding-top: calc(var(--header-height) + var(--space-20)); }
.hero { margin-top: calc(-1 * var(--header-height)); }