/* =========================================================
   MFD Navigation
   ========================================================= */

.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  height: var(--nav-h);
  display: flex;
  align-items: center;
  transition: background var(--dur-base) ease,
              backdrop-filter var(--dur-base) ease,
              box-shadow var(--dur-base) ease;
}

.nav.scrolled {
  background: rgba(10, 13, 11, 0.88);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  box-shadow: 0 1px 0 rgba(76,175,130,0.1),
              0 4px 24px rgba(0,0,0,0.3);
}

.nav__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 var(--sp-xl);
}

/* --- Logo --- */
.nav__logo {
  display: flex;
  align-items: center;
  text-decoration: none;
  transition: transform var(--dur-base) var(--ease-out),
              opacity var(--dur-base) ease;
  flex-shrink: 0;
}
.nav__logo:hover { opacity: 0.85; }

.nav__logo img,
.nav__logo svg {
  height: 42px;
  width: auto;
  transition: transform var(--dur-base) var(--ease-out);
}
.nav.scrolled .nav__logo img,
.nav.scrolled .nav__logo svg {
  transform: scale(0.92);
}

/* --- Links --- */
.nav__links {
  display: flex;
  align-items: center;
  gap: var(--sp-xl);
  list-style: none;
}

.nav__link {
  position: relative;
  font-family: var(--ff-display);
  font-weight: 600;
  font-size: 0.95rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--c-text-second);
  text-decoration: none;
  padding: 0.25rem 0;
  transition: color var(--dur-base) ease;
}

.nav__link::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--c-green);
  border-radius: var(--radius-full);
  transition: width var(--dur-base) var(--ease-out);
}

.nav__link:hover,
.nav__link.active {
  color: var(--c-text-primary);
}
.nav__link:hover::after,
.nav__link.active::after {
  width: 100%;
}

/* --- Right side: Lang + CTA --- */
.nav__right {
  display: flex;
  align-items: center;
  gap: var(--sp-lg);
}

/* --- Language Switcher --- */
.lang-switcher {
  display: flex;
  align-items: center;
  gap: 4px;
  background: var(--c-bg-surface);
  border: 1px solid var(--c-border);
  border-radius: var(--radius-full);
  padding: 3px;
}

.lang-btn {
  padding: 0.25rem 0.6rem;
  border-radius: var(--radius-full);
  font-family: var(--ff-display);
  font-weight: 600;
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--c-text-muted);
  cursor: pointer;
  transition: all var(--dur-fast) ease;
  border: none;
  background: none;
}
.lang-btn:hover { color: var(--c-text-primary); }
.lang-btn.active {
  background: var(--c-green);
  color: var(--c-bg-deep);
}

/* --- CTA Button --- */
.nav__cta {
  font-size: 0.85rem;
  padding: 0.55rem 1.25rem;
}

/* --- Mobile Hamburger --- */
.nav__hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: var(--sp-sm);
  cursor: pointer;
  z-index: 1010;
}

.nav__hamburger span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--c-text-primary);
  border-radius: var(--radius-full);
  transition: all var(--dur-base) var(--ease-out);
  transform-origin: center;
}

.nav__hamburger.open span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}
.nav__hamburger.open span:nth-child(2) {
  opacity: 0;
  transform: scaleX(0);
}
.nav__hamburger.open span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* --- Mobile Menu --- */
.nav__mobile {
  position: fixed;
  top: 0;
  right: -100%;
  width: min(320px, 85vw);
  height: 100dvh;
  background: var(--c-bg-card);
  border-left: 1px solid var(--c-border);
  z-index: 1005;
  display: flex;
  flex-direction: column;
  padding: calc(var(--nav-h) + var(--sp-xl)) var(--sp-xl) var(--sp-xl);
  gap: var(--sp-lg);
  transition: right 350ms var(--ease-out);
  overflow-y: auto;
}

.nav__mobile.open { right: 0; }

.nav__mobile-link {
  font-family: var(--ff-display);
  font-weight: 800;
  font-size: 1.5rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--c-text-second);
  text-decoration: none;
  padding: var(--sp-sm) 0;
  border-bottom: 1px solid var(--c-border);
  transition: color var(--dur-base) ease, padding-left var(--dur-base) ease;
}
.nav__mobile-link:hover {
  color: var(--c-green);
  padding-left: var(--sp-sm);
}

.nav__mobile-bottom {
  margin-top: auto;
  display: flex;
  flex-direction: column;
  gap: var(--sp-md);
}

.nav__backdrop {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.6);
  z-index: 1004;
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--dur-base) ease;
  backdrop-filter: blur(4px);
}
.nav__backdrop.visible {
  opacity: 1;
  pointer-events: all;
}

/* --- Responsive --- */
@media (max-width: 900px) {
  .nav__links { display: none; }
  .nav__hamburger { display: flex; }
  .nav__right .nav__cta { display: none; }
}

@media (max-width: 768px) {
  .nav__inner { padding: 0 var(--sp-lg); }
}