/* === БЛОК 1: НАВИГАЦИЯ === */
.nav-header {
  position: fixed;
  top: 0; left: 0; width: 100%;
  height: var(--header-h);
  background: rgba(249, 248, 246, 0.85);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid transparent;
  z-index: 100;
  transition: all 0.4s var(--ease-out);
  display: flex; align-items: center;
}

.nav-header--scrolled {
  background: rgba(249, 248, 246, 0.95);
  box-shadow: var(--shadow-sm);
  border-bottom: 1px solid var(--border-soft);
}

.nav-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
}

.nav-header__logo-wrapper {
  display: flex; flex-direction: column;
  text-decoration: none;
}

.nav-header__logo-img {
  height: 64px;
  width: auto;
  display: block;
  object-fit: contain;
  transition: opacity 0.3s var(--ease-out);
}

.nav-header__logo-wrapper:hover .nav-header__logo-img {
  opacity: 0.85;
}

.nav-header__subtitle {
  font-family: var(--font-mono);
  font-size: 9px; font-weight: 500;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.15em;
  margin-top: 2px;
}

.nav-header__tabs {
  display: flex; gap: 8px;
  background: var(--white);
  padding: 6px;
  border-radius: var(--radius-pill);
  border: 1px solid var(--border-light);
  box-shadow: var(--shadow-sm);
}

.nav-tab {
  font-family: var(--font-mono);
  font-size: 11px; font-weight: 600;
  color: var(--warm);
  text-transform: uppercase;
  text-decoration: none;
  padding: 10px 20px;
  border-radius: var(--radius-pill);
  transition: all 0.3s var(--ease-out);
}

.nav-tab:hover, .nav-tab.active {
  background: var(--accent-soft);
  color: var(--warm);
}

.nav-header__burger {
  display: none;
  background: none; border: none;
  width: 32px; height: 32px;
  position: relative;
  z-index: 101; 
}

.nav-header__burger span {
  position: absolute; left: 4px;
  width: 24px; height: 1.5px;
  background: var(--warm);
  transition: all 0.3s var(--ease-out);
}

.nav-header__burger span:first-child { top: 12px; }
.nav-header__burger span:last-child { bottom: 12px; }

.nav-header__burger.is-active span:first-child {
  top: 50%;
  transform: translateY(-50%) rotate(45deg);
}

.nav-header__burger.is-active span:last-child {
  bottom: 50%;
  transform: translateY(50%) rotate(-45deg);
}

/* === МОБИЛЬНЫЙ ОВЕРЛЕЙ === */
.nav-overlay {
  position: fixed;
  top: 0; left: 0; width: 100%; height: 100vh;
  background: rgba(249, 248, 246, 0.95);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  z-index: 99; 
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.4s var(--ease-out);
  display: flex;
  align-items: center;
  justify-content: center;
}

.nav-overlay.is-active {
  opacity: 1;
  pointer-events: auto;
}

.nav-overlay__inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 32px;
  transform: translateY(20px);
  transition: transform 0.4s var(--ease-out);
}

.nav-overlay.is-active .nav-overlay__inner {
  transform: translateY(0);
}

.nav-overlay__menu {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 16px;
}

.nav-overlay__menu .nav-tab {
  font-size: 16px;
  padding: 12px 24px;
  background: transparent;
  border: none;
  box-shadow: none;
}

.nav-overlay__cta {
  width: 100%;
  margin-top: 16px;
}

@media (max-width: 1024px) {
  .nav-tab { padding: 10px 14px; font-size: 10px; }
}

@media (max-width: 768px) {
  .nav-header { height: 80px; }
  .nav-header__tabs { display: none; }
  .nav-header__cta { display: none; }
  .nav-header__burger { display: block; }
}

@keyframes pulse-dot {
  0% { transform: scale(1); opacity: 1; }
  50% { transform: scale(1.3); opacity: 0.7; }
  100% { transform: scale(1); opacity: 1; }
}