.site-header {
  background-color: var(--color-surface);
  border-bottom: 2px solid var(--color-primary);
  position: sticky;
  top: 0;
  z-index: 1000;
  box-shadow: var(--shadow-sm);
}
.header-inner {
  padding-block: var(--space-2);
}
.site-logo {
  text-decoration: none;
}
.logo-text {
  font-family: var(--font-family-heading);
  font-size: var(--font-size-2xl);
  font-weight: 700;
  color: var(--color-primary);
  letter-spacing: 1px;
}
.menu-toggle {
  display: none;
  flex-direction: column;
  justify-content: space-around;
  width: 30px;
  height: 24px;
  background: transparent;
  border: none;
  cursor: pointer;
  z-index: 1001;
}
.hamburger {
  width: 100%;
  height: 2px;
  background-color: var(--color-primary);
  transition: all var(--transition-fast);
}
.nav-list {
  list-style: none;
  gap: var(--space-5);
}
.nav-link {
  font-family: var(--font-family-base);
  font-size: var(--font-size-sm);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--color-text);
}
.nav-link:hover {
  color: var(--color-primary);
}
.btn-nav {
  padding: var(--space-2) var(--space-4);
}
@media (max-width: 992px) {
  .menu-toggle {
    display: flex;
  }
  .main-nav {
    position: fixed;
    top: 0;
    right: -100%;
    width: 80%;
    max-width: 400px;
    height: 100vh;
    background-color: var(--color-background);
    border-left: 1px solid var(--color-secondary);
    padding: var(--space-8) var(--space-5) var(--space-5);
    transition: right var(--transition-normal);
    box-shadow: var(--shadow-lg);
    overflow-y: auto;
  }
  .main-nav.is-open {
    right: 0;
  }
  .nav-list {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--space-4);
  }
  .menu-toggle[aria-expanded="true"] .hamburger:nth-child(1) {
    transform: translateY(9px) rotate(45deg);
  }
  .menu-toggle[aria-expanded="true"] .hamburger:nth-child(2) {
    opacity: 0;
  }
  .menu-toggle[aria-expanded="true"] .hamburger:nth-child(3) {
    transform: translateY(-9px) rotate(-45deg);
  }
}