/* ===================================
   Header & Footer Styles
   =================================== */

/* Header / Navigation */
#header {
  position: sticky;
  top: 0;
  z-index: var(--z-sticky);
  background-color: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--color-border);
  transition: background-color var(--transition-base);
}

.nav-container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--space-4) var(--space-4);
  max-width: var(--container-xl);
  margin: 0 auto;
}

/* Logo */
.logo {
  font-size: var(--text-lg);
  font-weight: var(--font-weight-semibold);
  color: var(--color-text);
  text-decoration: none;
  transition: opacity var(--transition-fast);
}

.logo:hover {
  opacity: 0.7;
}

/* Desktop Navigation - Base styles */
.nav-menu {
  list-style: none;
  gap: var(--space-8);
  align-items: center;
}

.nav-menu li {
  margin: 0;
}

.nav-link {
  font-size: var(--text-base);
  font-weight: var(--font-weight-medium);
  color: var(--color-text-light);
  text-decoration: none;
  padding: var(--space-2) var(--space-3);
  border-radius: var(--radius-sm);
  transition: color var(--transition-fast), background-color var(--transition-fast);
}

.nav-link:hover {
  color: var(--color-primary);
  background-color: rgba(0, 109, 119, 0.05);
  opacity: 1;
}

.nav-link.active {
  color: var(--color-primary);
}

/* Mobile Menu Toggle Button - Only on mobile */
.menu-toggle {
  display: none;
}

@media (max-width: 767px) {
  .menu-toggle {
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    width: 24px;
    height: 18px;
    background: transparent;
    border: none;
    cursor: pointer;
    padding: 0;
    z-index: var(--z-modal);
  }
}

.menu-toggle span {
  display: block;
  width: 100%;
  height: 2px;
  background-color: var(--color-text);
  transition: all var(--transition-base);
  border-radius: 2px;
}

.menu-toggle.active span:nth-child(1) {
  transform: rotate(45deg) translate(5px, 5px);
}

.menu-toggle.active span:nth-child(2) {
  opacity: 0;
}

.menu-toggle.active span:nth-child(3) {
  transform: rotate(-45deg) translate(6px, -6px);
}

/* Mobile Navigation Menu - Only on mobile screens */
@media (max-width: 767px) {
  .nav-menu.mobile {
    display: none;
    position: fixed;
    top: 0;
    right: 0;
    width: 280px;
    height: 100vh;
    background-color: var(--color-bg);
    flex-direction: column;
    align-items: flex-start;
    padding: var(--space-24) var(--space-6);
    gap: var(--space-6);
    box-shadow: var(--shadow-lg);
    transform: translateX(100%);
    transition: transform var(--transition-base);
    z-index: var(--z-fixed);
  }

  .nav-menu.mobile.active {
    display: flex;
    transform: translateX(0);
  }

  .nav-menu.mobile .nav-link {
    font-size: var(--text-lg);
    width: 100%;
    padding: var(--space-3) var(--space-4);
  }
}

/* Mobile Overlay - Only on mobile */
@media (max-width: 767px) {
  .mobile-overlay {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100vh;
    background-color: rgba(0, 0, 0, 0.5);
    z-index: var(--z-modal);
    opacity: 0;
    transition: opacity var(--transition-base);
  }

  .mobile-overlay.active {
    display: block;
    opacity: 1;
  }
}

/* Tablet and Desktop: Show desktop nav, hide mobile toggle */
@media (min-width: 768px) {
  .nav-container {
    padding: var(--space-5) var(--space-6);
  }

  .nav-menu {
    display: flex;
  }

  .menu-toggle {
    display: none;
  }

  .nav-menu.mobile {
    display: flex;
    position: static;
    flex-direction: row;
    width: auto;
    height: auto;
    padding: 0;
    box-shadow: none;
    background-color: transparent;
  }

  .nav-menu.mobile .nav-link {
    font-size: var(--text-base);
    width: auto;
    padding: var(--space-2) var(--space-3);
  }

  .mobile-overlay {
    display: none !important;
  }
}

/* Footer */
#footer {
  background-color: var(--color-bg-subtle);
  border-top: 1px solid var(--color-border);
  padding: var(--space-12) var(--space-4);
  margin-top: var(--space-24);
}

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

.footer-text {
  font-size: var(--text-sm);
  color: var(--color-text-lighter);
  margin: 0 0 var(--space-4) 0;
  line-height: 1.4;
}

.footer-links {
  font-size: var(--text-sm);
  color: var(--color-text-lighter);
  margin: 0;
  line-height: 1.4;
}

.footer-link {
  color: var(--color-text-lighter);
  text-decoration: none;
  transition: color var(--transition-fast);
}

.footer-link:hover {
  color: var(--color-primary);
  opacity: 1;
}

.footer-separator {
  margin: 0 var(--space-2);
  color: var(--color-text-lighter);
}

@media (min-width: 768px) {
  #footer {
    padding: var(--space-16) var(--space-6);
  }
}