.header {
  position: sticky;
  top: 0;
  background: rgba(11, 18, 32, 0.9);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  z-index: 100;
}

.header__container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-block: 0.8rem;
}

.logo {
  color: var(--text);
  text-decoration: none;
  font-weight: 800;
  font-size: 1.2rem;
  letter-spacing: -0.02em;
}

.logo:hover {
  color: var(--accent);
}

.nav {
  display: none;
  align-items: center;
  gap: 2rem;
}

.nav a {
  color: var(--muted);
  text-decoration: none;
  font-size: 0.95rem;
  font-weight: 500;
  transition: color var(--transition);
}

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

.header-contacts {
  display: none;
  align-items: center;
  gap: 1.25rem;
}

.phone {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  color: var(--text);
  text-decoration: none;
  font-weight: 600;
  font-size: 0.95rem;
}

.phone:hover {
  color: var(--accent);
}

.burger {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2.5rem;
  height: 2.5rem;
  background: transparent;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--text);
  cursor: pointer;
  transition: border-color var(--transition);
}

.burger:hover {
  border-color: var(--accent);
}

.mobile-menu {
  position: fixed;
  inset: 0;
  background: var(--bg);
  padding: 4rem 1.5rem 1.5rem;
  transform: translateX(100%);
  transition: transform var(--transition);
  z-index: 200;
}

.mobile-menu.is-open {
  transform: translateX(0);
}

.mobile-menu__close {
  position: absolute;
  top: 1rem;
  right: 1rem;
  width: 2.5rem;
  height: 2.5rem;
  background: transparent;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--text);
  cursor: pointer;
}

.mobile-menu nav {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
  margin-bottom: 2rem;
}

.mobile-menu nav a {
  color: var(--text);
  text-decoration: none;
  font-size: 1.35rem;
  font-weight: 600;
}

.mobile-menu nav a:hover {
  color: var(--accent);
}