/**
 * Navigation Components
 * Based on locked design specification
 * Header: 80px desktop, 64px mobile
 */

/* === DESKTOP HEADER === */

.header {
  position: sticky;
  top: 0;
  z-index: 100;
  background-color: var(--color-white);
  border-bottom: 1px solid transparent;
  transition: box-shadow var(--transition-base),
              border-color var(--transition-base);
}

.header.is-scrolled {
  border-bottom-color: var(--color-gray-200);
  box-shadow: var(--shadow-scroll);
}

.header-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--header-height-desktop);
  max-width: var(--max-width-content);
  margin: 0 auto;
  padding: 0 var(--space-6);
}

.header-logo {
  font-family: var(--font-serif);
  font-size: 20px;
  font-weight: var(--weight-semibold);
  color: var(--color-black);
  text-decoration: none;
}

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

.header-logo:focus {
  outline: 2px solid var(--color-salmon);
  outline-offset: 2px;
  border-radius: 2px;
}

/* === DESKTOP NAVIGATION === */

.nav {
  display: flex;
  align-items: center;
  gap: var(--nav-spacing);
  list-style: none;
  margin: 0;
  padding: 0;
}

.nav-item {
  position: relative;
}

.nav-link {
  font-family: var(--font-sans);
  font-size: var(--text-sm);
  font-weight: var(--weight-normal);
  color: var(--color-black);
  text-decoration: none;
  letter-spacing: 0.02em;
  padding-bottom: 4px;
  display: inline-block;
  position: relative;
}

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

.nav-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 2px;
  background-color: var(--color-black);
  transform: scaleX(0);
  transition: transform var(--transition-base);
}

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

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

.nav-link:focus {
  outline: 2px solid var(--color-salmon);
  outline-offset: 2px;
  border-radius: 2px;
}

/* === MOBILE HEADER === */

@media (max-width: 1024px) {
  .header-container {
    height: var(--header-height-mobile);
    padding: 0 var(--space-3);
  }

  .header-logo {
    font-size: 18px;
  }

  /* Hide desktop nav on mobile */
  .nav {
    display: none;
  }

  /* Show mobile menu button */
  .mobile-menu-toggle {
    display: block;
  }
}

/* === MOBILE MENU TOGGLE === */

.mobile-menu-toggle {
  display: none;
  width: 44px;
  height: 44px;
  padding: 10px;
  background: none;
  border: none;
  cursor: pointer;
  position: relative;
}

.mobile-menu-toggle:focus {
  outline: 2px solid var(--color-salmon);
  outline-offset: 2px;
  border-radius: 2px;
}

.mobile-menu-icon {
  width: 24px;
  height: 24px;
  position: relative;
  display: inline-block;
}

.mobile-menu-icon span {
  display: block;
  width: 100%;
  height: 2px;
  background-color: var(--color-black);
  position: absolute;
  left: 0;
  transition: transform var(--transition-base),
              opacity var(--transition-base);
}

.mobile-menu-icon span:nth-child(1) {
  top: 4px;
}

.mobile-menu-icon span:nth-child(2) {
  top: 11px;
}

.mobile-menu-icon span:nth-child(3) {
  top: 18px;
}

/* Menu open state */
.mobile-menu-toggle.is-open .mobile-menu-icon span:nth-child(1) {
  transform: rotate(45deg);
  top: 11px;
}

.mobile-menu-toggle.is-open .mobile-menu-icon span:nth-child(2) {
  opacity: 0;
}

.mobile-menu-toggle.is-open .mobile-menu-icon span:nth-child(3) {
  transform: rotate(-45deg);
  top: 11px;
}

/* === MOBILE MENU === */

.mobile-menu {
  display: none;
  position: fixed;
  top: var(--header-height-mobile);
  left: 0;
  right: 0;
  bottom: 0;
  background-color: var(--color-white);
  padding: var(--space-4);
  overflow-y: auto;
  z-index: 99;
}

.mobile-menu.is-open {
  display: block;
}

.mobile-nav {
  list-style: none;
  margin: 0;
  padding: 0;
}

.mobile-nav-item {
  border-bottom: 1px solid var(--color-gray-200);
}

.mobile-nav-link {
  display: block;
  font-family: var(--font-sans);
  font-size: var(--text-base);
  font-weight: var(--weight-normal);
  color: var(--color-black);
  text-decoration: none;
  padding: var(--space-3) 0;
  transition: color var(--transition-base);
}

.mobile-nav-link:hover,
.mobile-nav-link.is-active {
  color: var(--color-salmon);
}

.mobile-nav-link:focus {
  outline: 2px solid var(--color-salmon);
  outline-offset: 2px;
  border-radius: 2px;
}

/* === FOOTER === */

.footer {
  background-color: var(--color-off-white);
  padding: var(--space-8) var(--space-6) var(--space-4);
}

.footer-container {
  max-width: var(--max-width-content);
  margin: 0 auto;
}

.footer-content {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-6);
  margin-bottom: var(--space-6);
}

.footer-column {
  display: flex;
  flex-direction: column;
}

.footer-logo {
  font-family: var(--font-serif);
  font-size: var(--text-xl);
  font-weight: var(--weight-semibold);
  color: var(--color-black);
  margin-bottom: var(--space-2);
  line-height: 1.2;
}

.footer-tagline {
  font-family: var(--font-sans);
  font-size: var(--text-xs);
  color: var(--color-gray-600);
  line-height: var(--leading-relaxed);
}

.footer-heading {
  font-family: var(--font-sans);
  font-size: var(--text-sm);
  font-weight: var(--weight-semibold);
  color: var(--color-black);
  margin-bottom: var(--space-2);
}

.footer-links {
  list-style: none;
  margin: 0;
  padding: 0;
}

.footer-links li {
  margin-bottom: var(--space-1);
}

.footer-links a {
  font-family: var(--font-sans);
  font-size: var(--text-sm);
  font-weight: var(--weight-normal);
  color: var(--color-gray-800);
  text-decoration: none;
  line-height: 2.0;
  transition: color var(--transition-base);
}

.footer-links a:hover {
  color: var(--color-salmon);
}

.footer-links a:focus {
  outline: 2px solid var(--color-salmon);
  outline-offset: 2px;
  border-radius: 2px;
}

.footer-bottom {
  border-top: 1px solid var(--color-gray-200);
  padding-top: var(--space-3);
  text-align: center;
}

.footer-copyright {
  font-family: var(--font-sans);
  font-size: var(--text-xs);
  color: var(--color-gray-600);
  margin-bottom: var(--space-1);
}

.footer-dedication {
  font-family: var(--font-sans);
  font-size: 11px;
  color: var(--color-gray-600);
  margin: 0;
}

/* === FOOTER MOBILE === */

@media (max-width: 1024px) {
  .footer-content {
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-4);
  }
}

@media (max-width: 768px) {
  .footer {
    padding: var(--space-6) var(--space-3) var(--space-4);
  }

  .footer-content {
    grid-template-columns: 1fr;
    gap: var(--space-4);
  }

  .footer-column {
    padding-bottom: var(--space-3);
    border-bottom: 1px solid var(--color-gray-200);
  }

  .footer-column:last-child {
    border-bottom: none;
  }
}