/* nav.css — Фиксированная навигация */

.site-nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  height: var(--nav-height);
  background-color: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid transparent;
  transition: border-color var(--transition-base);
}

.site-nav.scrolled {
  border-bottom-color: var(--light);
}

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

/* Logo */
.nav-logo {
  font-size: 15px;
  font-weight: var(--w-regular);
  letter-spacing: 0;
  line-height: 1;
  color: var(--mid);
  text-decoration: none;
  display: flex;
  align-items: center;
  gap: 0.35em;
}

.nav-logo strong {
  font-weight: var(--w-bold);
  color: var(--fg);
}

/* Nav links */
.nav-links {
  display: flex;
  align-items: center;
  gap: var(--space-lg);
}

.nav-link {
  font-size: 15px;
  font-weight: var(--w-medium);
  color: var(--mid);
  text-decoration: none;
  transition: color var(--transition-fast);
  position: relative;
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: -3px;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--accent);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--transition-base);
}

.nav-link:hover {
  color: var(--fg);
}

.nav-link:hover::after {
  transform: scaleX(1);
}

/* Nav CTA */
.nav-cta {
  padding: 10px 22px;
  font-size: 14px;
}

/* Mobile menu toggle */
.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: 4px;
}

.nav-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--fg);
  border-radius: 2px;
  transition: transform var(--transition-base), opacity var(--transition-base);
}

.nav-toggle.open span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.nav-toggle.open span:nth-child(2) {
  opacity: 0;
}

.nav-toggle.open span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* Mobile drawer */
.nav-drawer {
  display: none;
  position: fixed;
  top: var(--nav-height);
  left: 0;
  right: 0;
  background: var(--bg);
  border-bottom: 1px solid var(--light);
  padding: var(--space-md) var(--container-pad);
  flex-direction: column;
  gap: var(--space-sm);
  z-index: 99;
}

.nav-drawer.open {
  display: flex;
}

.nav-drawer .nav-link {
  font-size: 18px;
  color: var(--fg);
  padding: var(--space-xs) 0;
  border-bottom: 1px solid var(--light);
}

.nav-drawer .btn {
  align-self: flex-start;
  margin-top: var(--space-xs);
}