.mobile-menu-overlay {
  position: fixed;
  top: var(--navbar-height);
  left: 0;
  right: 0;
  bottom: 0;
  background-color: rgba(0, 0, 0, 0.6);
  backdrop-filter: blur(8px);
  z-index: 998;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.3s ease, visibility 0.3s ease;
  -webkit-overflow-scrolling: touch;
}

.mobile-menu-overlay.open {
  opacity: 1;
  visibility: visible;
}

.mobile-menu {
  background-color: var(--color-white);
  height: 100%;
  width: 100%;
  max-width: 85%;
  margin-left: auto;
  box-shadow: -4px 0 20px rgba(0, 0, 0, 0.15);
  transform: translateX(100%);
  transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
  display: flex;
  flex-direction: column;
}

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

.mobile-menu-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--spacing-md) var(--spacing-md);
  border-bottom: 2px solid var(--color-grey-light);
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
  position: sticky;
  top: 0;
  z-index: 10;
}

.mobile-menu-header h3 {
  margin: 0;
  font-size: 1.25rem;
  color: var(--color-white);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 1px;
}

.mobile-menu-close {
  width: 40px;
  height: 40px;
  font-size: 1.75rem;
  color: var(--color-white);
  background: rgba(255, 255, 255, 0.1);
  border: none;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all var(--transition-fast);
  line-height: 1;
  min-width: 40px;
  min-height: 40px;
}

.mobile-menu-close:hover {
  background-color: rgba(255, 255, 255, 0.2);
  color: var(--color-white);
  transform: rotate(90deg);
}

.mobile-menu-close:active {
  transform: rotate(90deg) scale(0.95);
}

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

.mobile-menu-list > li {
  border-bottom: 1px solid var(--color-grey-light);
}

.mobile-menu-link {
  display: block;
  padding: var(--spacing-md);
  color: var(--color-charcoal);
  font-weight: 500;
  transition: all var(--transition-fast);
  text-decoration: none;
  border-left: 3px solid transparent;
  position: relative;
}

.mobile-menu-link:hover,
.mobile-menu-link:active {
  color: var(--color-primary);
  background-color: var(--color-grey-light);
  border-left-color: var(--color-secondary);
  padding-left: calc(var(--spacing-md) - 3px);
}

.mobile-menu-section {
  border-bottom: 1px solid var(--color-grey-light);
}

.mobile-menu-section-toggle {
  width: 100%;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--spacing-md);
  background: transparent;
  border: none;
  color: var(--color-charcoal);
  font-weight: 600;
  font-size: 1rem;
  text-align: left;
  cursor: pointer;
  transition: all var(--transition-fast);
  border-left: 3px solid transparent;
  min-height: 44px;
}

.mobile-menu-section-toggle:hover,
.mobile-menu-section-toggle:active {
  color: var(--color-primary);
  background-color: var(--color-grey-light);
  border-left-color: var(--color-secondary);
  padding-left: calc(var(--spacing-md) - 3px);
}

.mobile-menu-arrow {
  transition: transform var(--transition-fast);
  flex-shrink: 0;
  margin-left: var(--spacing-sm);
}

.mobile-menu-arrow.expanded {
  transform: rotate(180deg);
}

.mobile-menu-sublist {
  list-style: none;
  margin: 0;
  padding: 0;
  background-color: rgba(0, 47, 95, 0.03);
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

.mobile-menu-sublist.expanded {
  max-height: 2000px;
  border-top: 1px solid var(--color-grey-medium);
  border-bottom: 1px solid var(--color-grey-medium);
}

.mobile-menu-sublist li {
  border-bottom: 1px solid var(--color-grey-medium);
}

.mobile-menu-sublist .mobile-menu-link {
  padding-left: calc(var(--spacing-md) * 2);
  font-weight: 400;
}

.mobile-menu-sublist .mobile-menu-sublist .mobile-menu-link {
  padding-left: calc(var(--spacing-md) * 3);
}

/* Marked keyword styling for "Gold" in Lines menu item (mobile) */
.mobile-menu-link.lines-menu-item .marked-keyword {
  color: #D4AF37;
  font-weight: 700;
  position: relative;
  display: inline-block;
}

.mobile-menu-link.lines-menu-item .marked-keyword::after {
  content: '';
  position: absolute;
  bottom: 2px;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(90deg, #D4AF37 0%, #FFD700 100%);
  opacity: 0.6;
  border-radius: 1px;
}

.mobile-menu-link.lines-menu-item:hover .marked-keyword {
  color: #FFD700;
}

.mobile-menu-link.lines-menu-item:hover .marked-keyword::after {
  opacity: 1;
  height: 3px;
}

@keyframes fadeIn {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}

@keyframes slideDown {
  from {
    transform: translateY(-20px);
    opacity: 0;
  }
  to {
    transform: translateY(0);
    opacity: 1;
  }
}

@media (max-width: 768px) {
  .mobile-menu {
    max-width: 85%;
  }

  .mobile-menu-header {
    padding: var(--spacing-md);
  }

  .mobile-menu-header h3 {
    font-size: 1.1rem;
  }

  .mobile-menu-close {
    width: 40px;
    height: 40px;
    min-width: 40px;
    min-height: 40px;
    font-size: 1.5rem;
  }

  .mobile-menu-list {
    padding-top: var(--spacing-xs);
  }

  .mobile-menu-link,
  .mobile-menu-section-toggle {
    padding: var(--spacing-md);
    font-size: 1rem;
    min-height: 48px;
    display: flex;
    align-items: center;
  }

  .mobile-menu-sublist .mobile-menu-link {
    padding-left: calc(var(--spacing-md) * 1.5);
    font-size: 0.95rem;
    font-weight: 400;
  }

  .mobile-menu-sublist .mobile-menu-sublist .mobile-menu-link {
    padding-left: calc(var(--spacing-md) * 2);
    font-size: 0.9rem;
  }

  .mobile-menu-arrow {
    width: 18px;
    height: 18px;
    flex-shrink: 0;
  }
}

@media (max-width: 480px) {
  .mobile-menu {
    max-width: 90%;
  }

  .mobile-menu-header {
    padding: var(--spacing-sm) var(--spacing-md);
  }

  .mobile-menu-header h3 {
    font-size: 1rem;
  }

  .mobile-menu-close {
    width: 36px;
    height: 36px;
    min-width: 36px;
    min-height: 36px;
    font-size: 1.4rem;
  }

  .mobile-menu-link,
  .mobile-menu-section-toggle {
    padding: var(--spacing-sm) var(--spacing-md);
    font-size: 0.95rem;
    min-height: 44px;
  }

  .mobile-menu-sublist .mobile-menu-link {
    padding-left: calc(var(--spacing-md) * 1.5);
    font-size: 0.9rem;
  }

  .mobile-menu-sublist .mobile-menu-sublist .mobile-menu-link {
    padding-left: calc(var(--spacing-md) * 2);
    font-size: 0.85rem;
  }
}