/* ================================================================
   ECON Tech — Navbar
   Fixed top nav with scroll effect + hamburger menu for mobile.
   ================================================================ */

#navbar {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 1000;
  height: var(--nav-h);
  transition: background 0.3s, box-shadow 0.3s;
  background: transparent;
}

#navbar.scrolled {
  background: rgba(28,28,28,0.96);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  box-shadow: 0 1px 0 rgba(255,255,255,0.06);
}

.nav-inner {
  display: flex;
  align-items: center;
  height: var(--nav-h);
  justify-content: space-between;
}

/* ── Logo ── */
.nav-logo {
  display: flex;
  align-items: center;
  flex-shrink: 0;
  z-index: 1001;
}

.nav-logo img {
  height: 36px;
  width: auto;
  max-width: 140px;
  display: block;
  flex-shrink: 0;
  object-fit: contain;
}

/* ── Desktop nav links ── */
.nav-links {
  display: flex;
  align-items: center;
  gap: 36px;
}

.nav-links a {
  font-family: var(--font-head);
  font-size: 14px;
  font-weight: 500;
  color: rgba(255,255,255,0.80);
  letter-spacing: 0.02em;
  transition: color var(--transition);
}

.nav-links a:hover { color: var(--red); }

/* ── Right side group ── */
.nav-right {
  display: flex;
  align-items: center;
  gap: 12px;
}

/* ── Language toggle ── */
.lang-toggle {
  display: flex;
  align-items: center;
}

.lang-btn {
  background: none;
  border: 1px solid rgba(255,255,255,0.22);
  color: rgba(255,255,255,0.45);
  font-family: var(--font-head);
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.1em;
  padding: 5px 9px;
  cursor: pointer;
  transition: all 0.2s;
  line-height: 1;
}

.lang-btn:first-child { border-radius: 3px 0 0 3px; border-right: none; }
.lang-btn:last-child  { border-radius: 0 3px 3px 0; }
.lang-btn.active      { background: var(--red); border-color: var(--red); color: #fff; }
.lang-btn:hover:not(.active) {
  border-color: rgba(255,255,255,0.5);
  color: rgba(255,255,255,0.8);
}

/* ── Hamburger button ── */
.nav-hamburger {
  display: none;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 5px;
  width: 40px;
  height: 40px;
  cursor: pointer;
  z-index: 1001;
  background: none;
  border: none;
  padding: 4px;
}

.nav-hamburger span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--white);
  border-radius: 2px;
  transition: transform 0.3s ease, opacity 0.3s ease, width 0.3s ease;
  transform-origin: center;
}

/* Hamburger → X animation */
.nav-hamburger.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-hamburger.open span:nth-child(2) { opacity: 0; width: 0; }
.nav-hamburger.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ── Mobile drawer ── */
.nav-mobile-drawer {
  display: none;
  position: fixed;
  top: var(--nav-h);
  left: 0; right: 0;
  background: rgba(20,21,32,0.98);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-top: 1px solid rgba(255,255,255,0.06);
  padding: 24px var(--container-px) 32px;
  z-index: 999;
  transform: translateY(-8px);
  opacity: 0;
  pointer-events: none;
  transition: transform 0.3s ease, opacity 0.3s ease;
}

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

.nav-mobile-links {
  display: flex;
  flex-direction: column;
  gap: 4px;
  margin-bottom: 24px;
}

.nav-mobile-links a {
  font-family: var(--font-head);
  font-size: 16px;
  font-weight: 600;
  color: rgba(255,255,255,0.75);
  padding: 12px 0;
  border-bottom: 1px solid rgba(255,255,255,0.06);
  transition: color var(--transition);
}

.nav-mobile-links a:hover { color: var(--red); }

.nav-mobile-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
}

/* ── Responsive ── */
@media (max-width: 900px) {
  .nav-links { display: none; }
  .nav-hamburger { display: flex; }
  .nav-mobile-drawer { display: block; }
  /* Hide CTA in nav on small screens — it's in the drawer */
  .nav-cta { display: none; }
}

@media (max-width: 480px) {
  .nav-logo img { height: 30px; }
}