/**
 * Mobile Navigation Styles
 * Optimized for touch devices with hamburger menu and mobile-first design
 * @author South Shore Behavioral Health Clinic
 */

/* Mobile Navigation Variables */
:root {
  --mobile-nav-height: 60px;
  --mobile-nav-bg: #136d6d;
  --mobile-nav-text: #ffffff;
  --mobile-nav-overlay: rgba(0, 0, 0, 0.5);
  --mobile-nav-transition: 0.3s ease;
  --mobile-nav-breakpoint: 768px;
}

/* Mobile Navigation Base Styles */
.mobile-nav {
  display: none;
}

@media (max-width: 768px) {
  .mobile-nav {
    display: block;
  }

  /* Hide desktop navigation on mobile */
  .header__nav {
    display: none !important;
  }

  /* Mobile Header */
  .mobile-header {
    background: var(--mobile-nav-bg);
    color: var(--mobile-nav-text);
    position: sticky;
    top: 0;
    z-index: 1000;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
  }

  .mobile-header__container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 1rem;
    height: var(--mobile-nav-height);
    max-width: 100%;
    margin: 0 auto;
  }

  /* Mobile Logo */
  .mobile-logo {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    text-decoration: none;
    color: inherit;
  }

  .mobile-logo__image {
    height: 40px;
    width: auto;
  }

  .mobile-logo__text {
    font-size: 1.1rem;
    font-weight: 600;
    margin: 0;
    line-height: 1.2;
  }

  /* Hamburger Menu */
  .hamburger-menu {
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    width: 44px;
    height: 44px;
    background: transparent;
    border: none;
    cursor: pointer;
    padding: 8px;
    border-radius: 4px;
    transition: background-color var(--mobile-nav-transition);
  }

  .hamburger-menu:hover {
    background-color: rgba(255, 255, 255, 0.1);
  }

  .hamburger-menu:focus {
    outline: 2px solid #ffffff;
    outline-offset: 2px;
  }

  .hamburger-menu__line {
    width: 24px;
    height: 2px;
    background-color: var(--mobile-nav-text);
    transition: all var(--mobile-nav-transition);
    border-radius: 1px;
  }

  .hamburger-menu__line:not(:last-child) {
    margin-bottom: 4px;
  }

  /* Hamburger Animation States */
  .hamburger-menu--active .hamburger-menu__line:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
  }

  .hamburger-menu--active .hamburger-menu__line:nth-child(2) {
    opacity: 0;
  }

  .hamburger-menu--active .hamburger-menu__line:nth-child(3) {
    transform: rotate(-45deg) translate(7px, -6px);
  }

  /* Mobile Navigation Menu */
  .mobile-nav-menu {
    position: fixed;
    top: var(--mobile-nav-height);
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--mobile-nav-bg);
    transform: translateX(-100%);
    transition: transform var(--mobile-nav-transition);
    z-index: 1001;
    overflow-y: auto;
    padding: 1rem 0;
  }

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

  /* Mobile Navigation Overlay */
  .mobile-nav-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--mobile-nav-overlay);
    opacity: 0;
    visibility: hidden;
    transition: all var(--mobile-nav-transition);
    z-index: 998;
  }

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

  /* Mobile Navigation List */
  .mobile-nav-list {
    list-style: none;
    padding: 0;
    margin: 0;
  }

  .mobile-nav-item {
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  }

  .mobile-nav-link {
    display: block;
    padding: 1rem 1.5rem;
    color: var(--mobile-nav-text);
    text-decoration: none;
    font-size: 1.1rem;
    font-weight: 500;
    transition: all var(--mobile-nav-transition);
    position: relative;
    min-height: 44px;
    display: flex;
    align-items: center;
  }

  .mobile-nav-link:hover,
  .mobile-nav-link:focus {
    background-color: rgba(255, 255, 255, 0.1);
    padding-left: 2rem;
    outline: none;
  }

  .mobile-nav-link:focus {
    outline: 2px solid #ffffff;
    outline-offset: -2px;
  }

  /* Active navigation item */
  .mobile-nav-link--active {
    background-color: rgba(255, 255, 255, 0.15);
    border-left: 4px solid #ffffff;
  }

  /* Submenu Styles */
  .mobile-nav-submenu {
    background: rgba(0, 0, 0, 0.1);
    max-height: 0;
    overflow: hidden;
    transition: max-height var(--mobile-nav-transition);
  }

  .mobile-nav-submenu--open {
    max-height: 300px;
  }

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

  .mobile-nav-subitem {
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
  }

  .mobile-nav-sublink {
    display: block;
    padding: 0.75rem 1.5rem 0.75rem 3rem;
    color: rgba(255, 255, 255, 0.9);
    text-decoration: none;
    font-size: 1rem;
    transition: all var(--mobile-nav-transition);
    min-height: 44px;
    display: flex;
    align-items: center;
  }

  .mobile-nav-sublink:hover,
  .mobile-nav-sublink:focus {
    background-color: rgba(255, 255, 255, 0.05);
    outline: none;
  }

  /* Mobile Navigation Footer */
  .mobile-nav-footer {
    padding: 1.5rem;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    margin-top: 2rem;
  }

  .mobile-nav-contact {
    margin-bottom: 1rem;
  }

  .mobile-nav-phone {
    display: inline-block;
    background: #ffffff;
    color: var(--mobile-nav-bg);
    padding: 0.75rem 1.5rem;
    border-radius: 25px;
    text-decoration: none;
    font-weight: 600;
    transition: all var(--mobile-nav-transition);
    min-height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
  }

  .mobile-nav-phone:hover,
  .mobile-nav-phone:focus {
    background: #f8f9fa;
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
    outline: none;
  }

  /* Mobile Navigation Animations */
  @keyframes slideInFromLeft {
    from {
      transform: translateX(-100%);
    }
    to {
      transform: translateX(0);
    }
  }

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

  .mobile-nav-menu--open {
    animation: slideInFromLeft 0.3s ease-out;
  }

  .mobile-nav-overlay--visible {
    animation: fadeIn 0.3s ease-out;
  }

  /* Accessibility Enhancements */
  .mobile-nav-link[aria-current="page"] {
    background-color: rgba(255, 255, 255, 0.15);
    border-left: 4px solid #ffffff;
  }

  /* Skip link for mobile */
  .skip-link {
    position: absolute;
    top: -40px;
    left: 6px;
    background: var(--mobile-nav-bg);
    color: var(--mobile-nav-text);
    padding: 8px;
    text-decoration: none;
    border-radius: 4px;
    z-index: 1001;
    font-weight: 600;
  }

  .skip-link:focus {
    top: 6px;
  }

  /* Touch target improvements */
  .mobile-nav-link,
  .mobile-nav-sublink,
  .hamburger-menu {
    min-height: 44px;
    min-width: 44px;
  }

  /* Reduce motion for users who prefer it */
  @media (prefers-reduced-motion: reduce) {
    .mobile-nav-menu,
    .mobile-nav-overlay,
    .mobile-nav-link,
    .hamburger-menu__line {
      transition: none;
      animation: none;
    }
  }
}

/* Large Mobile Devices */
@media (min-width: 481px) and (max-width: 768px) {
  .mobile-header__container {
    padding: 0 1.5rem;
  }

  .mobile-logo__text {
    font-size: 1.2rem;
  }
}

/* Small Mobile Devices */
@media (max-width: 480px) {
  .mobile-header__container {
    padding: 0 0.75rem;
  }

  .mobile-logo__text {
    font-size: 1rem;
  }

  .mobile-nav-link {
    padding: 1rem;
    font-size: 1rem;
  }

  .mobile-nav-sublink {
    padding-left: 2.5rem;
  }
}

/* High contrast mode support */
@media (prefers-contrast: high) {
  .hamburger-menu {
    border: 1px solid;
  }

  .mobile-nav-link:focus,
  .hamburger-menu:focus {
    outline: 3px solid #ffffff;
    outline-offset: 2px;
  }
}

/* Print styles */
@media print {
  .mobile-nav {
    display: none !important;
  }
}