/**
 * AI Blog - Modern Accessible Left-Side Off-Canvas Mobile Drawer Menu
 */

/* Prevent body scroll when mobile drawer is open */
body.mobile-menu-open {
  overflow: hidden !important;
  touch-action: none;
}

/* Mobile menu bar header */
.mobile-menu-bar {
  display: none;
  background: #ffffff;
  border-bottom: 1px solid rgba(0, 0, 0, 0.08);
  position: relative;
  z-index: 1001;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.04);
}

.mobile-menu-header {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  padding: 10px 0;
}

/* Hamburger Toggle Button */
.hamburger-btn,
#mmenu-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  background-color: var(--color-primary, #2563eb);
  color: #ffffff !important;
  border: 1px solid var(--color-primary, #2563eb);
  border-radius: 6px;
  padding: 9px 18px;
  font-size: 14px;
  font-weight: 600;
  line-height: 1;
  cursor: pointer;
  min-height: 42px;
  text-decoration: none;
  transition: all 0.25s ease;
  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.1);
  margin-left: auto;
}

.hamburger-btn:hover,
#mmenu-btn:hover {
  background-color: var(--color-primary, #2563eb);
  filter: brightness(0.92);
  color: #ffffff !important;
  transform: translateY(-1px);
  box-shadow: 0 4px 10px rgba(0, 0, 0, 0.15);
}

.hamburger-btn:focus-visible,
#mmenu-btn:focus-visible {
  outline: 2px solid var(--color-primary, #2563eb);
  outline-offset: 2px;
}

.hamburger-btn:active,
#mmenu-btn:active {
  transform: translateY(0);
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
}

/* 3-Bar Animated Hamburger Icon */
.hamburger-box {
  width: 20px;
  height: 14px;
  display: inline-flex;
  flex-direction: column;
  justify-content: space-between;
  position: relative;
}

.hamburger-line {
  display: block;
  width: 100%;
  height: 2px;
  background-color: #ffffff;
  border-radius: 2px;
  transition: transform 0.28s cubic-bezier(0.4, 0, 0.2, 1), opacity 0.2s ease;
  transform-origin: center;
}

/* Transform Hamburger into 'X' when Open */
#mmenu-btn[aria-expanded="true"] .line-1,
body.mobile-menu-open #mmenu-btn .line-1 {
  transform: translateY(6px) rotate(45deg);
}

#mmenu-btn[aria-expanded="true"] .line-2,
body.mobile-menu-open #mmenu-btn .line-2 {
  opacity: 0;
  transform: scaleX(0);
}

#mmenu-btn[aria-expanded="true"] .line-3,
body.mobile-menu-open #mmenu-btn .line-3 {
  transform: translateY(-6px) rotate(-45deg);
}

/* Hamburger Label */
.hamburger-label {
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 0.3px;
  color: #ffffff;
}

/* Off-Canvas Backdrop Overlay */
.mobile-menu-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  height: 100dvh;
  background: rgba(15, 23, 42, 0.6);
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
  z-index: 99998;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.35s ease, visibility 0.35s ease;
  pointer-events: none;
}

.mobile-menu-overlay.is-active,
body.mobile-menu-open .mobile-menu-overlay {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
}

/* Off-Canvas Left-Side Navigation Drawer */
nav#mobile-navigation.mobile-nav-drawer {
  position: fixed;
  top: 0;
  left: 0;
  bottom: 0;
  width: 320px;
  max-width: 85vw;
  height: 100vh;
  height: 100dvh;
  background: #ffffff;
  z-index: 99999;
  box-shadow: 12px 0 35px rgba(0, 0, 0, 0.2);
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
  transform: translateX(-100%);
  visibility: hidden;
  transition: transform 0.35s cubic-bezier(0.25, 1, 0.5, 1), visibility 0.35s ease;
  display: flex;
  flex-direction: column;
}

nav#mobile-navigation.mobile-nav-drawer.is-open,
body.mobile-menu-open nav#mobile-navigation.mobile-nav-drawer {
  transform: translateX(0);
  visibility: visible;
}

/* Drawer Header */
.drawer-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 20px;
  border-bottom: 1px solid rgba(0, 0, 0, 0.08);
  background: #ffffff;
  position: sticky;
  top: 0;
  z-index: 10;
  flex-shrink: 0;
}

.drawer-branding .drawer-title {
  font-size: 18px;
  font-weight: 700;
  color: var(--color-heading, #1e293b);
  letter-spacing: -0.01em;
}

.drawer-close-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  background: rgba(0, 0, 0, 0.05);
  border: none;
  border-radius: 8px;
  color: #64748b;
  cursor: pointer;
  transition: all 0.2s ease;
  padding: 0;
}

.drawer-close-btn:hover {
  background: rgba(var(--color-primary-rgb, 37, 99, 235), 0.1);
  color: var(--color-primary, #2563eb);
}

.drawer-close-btn:focus-visible {
  outline: 2px solid var(--color-primary, #2563eb);
  outline-offset: 2px;
}

/* Drawer Body */
.drawer-body {
  flex: 1 1 auto;
  padding: 10px 0 30px;
  overflow-y: auto;
}

/* Reset Lists */
nav#mobile-navigation ul,
.wsm-menu-wrapper ul,
.wsm-menu ul,
ul.wsm-menu {
  list-style: none;
  margin: 0;
  padding: 0;
}

/* Menu Items inside Drawer */
nav#mobile-navigation li {
  position: relative;
  list-style: none;
  margin: 0;
  padding: 0;
  border-bottom: 1px solid rgba(0, 0, 0, 0.05);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
}

nav#mobile-navigation li:last-child {
  border-bottom: none;
}

/* Menu Item Links */
nav#mobile-navigation li a {
  flex: 1 1 auto;
  display: block;
  padding: 13px 20px;
  font-size: 15px;
  font-weight: 600;
  color: #1e293b;
  text-decoration: none;
  transition: color 0.2s ease, background-color 0.2s ease, padding-left 0.2s ease;
  line-height: 1.4;
}

nav#mobile-navigation li a:hover,
nav#mobile-navigation li a:focus {
  color: var(--color-primary, #2563eb);
  background-color: rgba(var(--color-primary-rgb, 37, 99, 235), 0.06);
  padding-left: 24px;
  outline: none;
}

nav#mobile-navigation li a:focus-visible {
  outline: 2px solid var(--color-primary, #2563eb);
  outline-offset: -2px;
}

/* Submenu Accordion Toggle Button */
.submenu-toggle {
  flex: 0 0 44px;
  width: 44px;
  height: 44px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: transparent;
  border: none;
  color: #64748b;
  cursor: pointer;
  border-radius: 6px;
  margin-right: 8px;
  padding: 0;
  transition: color 0.2s ease, background-color 0.2s ease;
}

.submenu-toggle:hover {
  color: var(--color-primary, #2563eb);
  background-color: rgba(0, 0, 0, 0.05);
}

.submenu-toggle:focus-visible {
  outline: 2px solid var(--color-primary, #2563eb);
  outline-offset: -2px;
  color: var(--color-primary, #2563eb);
}

/* Chevron Rotation */
.submenu-toggle .submenu-icon {
  display: block;
  transition: transform 0.25s ease;
}

.submenu-toggle[aria-expanded="true"] .submenu-icon,
nav#mobile-navigation li.submenu-open > .submenu-toggle .submenu-icon {
  transform: rotate(180deg);
}

.submenu-toggle[aria-expanded="true"],
nav#mobile-navigation li.submenu-open > .submenu-toggle {
  color: var(--color-primary, #2563eb);
}

/* Submenu Accordion Container */
nav#mobile-navigation .sub-menu,
nav#mobile-navigation .children {
  flex: 0 0 100%;
  width: 100%;
  list-style: none;
  margin: 0;
  padding: 0;
  max-height: 0;
  opacity: 0;
  visibility: hidden;
  overflow: hidden;
  transition: max-height 0.35s cubic-bezier(0.25, 1, 0.5, 1), opacity 0.25s ease, visibility 0.25s ease;
  background: #f8fafc;
  border-top: 1px solid transparent;
}

/* Submenu Open State - synchronized with aria-expanded="true" and .submenu-open */
nav#mobile-navigation li.submenu-open > .sub-menu,
nav#mobile-navigation li.submenu-open > .children,
nav#mobile-navigation li > .submenu-toggle[aria-expanded="true"] ~ .sub-menu,
nav#mobile-navigation li > .submenu-toggle[aria-expanded="true"] ~ .children {
  max-height: 1200px;
  opacity: 1;
  visibility: visible;
  border-top-color: rgba(0, 0, 0, 0.06);
  padding: 4px 0;
}

/* Submenu Links */
nav#mobile-navigation .sub-menu li a,
nav#mobile-navigation .children li a {
  padding: 11px 20px 11px 36px;
  font-size: 14px;
  font-weight: 500;
  color: #475569;
}

nav#mobile-navigation .sub-menu li a:hover,
nav#mobile-navigation .sub-menu li a:focus,
nav#mobile-navigation .children li a:hover,
nav#mobile-navigation .children li a:focus {
  color: var(--color-primary, #2563eb);
  background-color: rgba(var(--color-primary-rgb, 37, 99, 235), 0.06);
  padding-left: 40px;
}

/* Level 3 Submenu Links */
nav#mobile-navigation .sub-menu .sub-menu li a,
nav#mobile-navigation .children .children li a {
  padding-left: 52px;
}

nav#mobile-navigation .sub-menu .sub-menu li a:hover,
nav#mobile-navigation .sub-menu .sub-menu li a:focus,
nav#mobile-navigation .children .children li a:hover,
nav#mobile-navigation .children .children li a:focus {
  padding-left: 56px;
}

/* Dark Mode Support */
body.dark .mobile-menu-bar {
  background: #0f172a;
  border-bottom-color: #1e293b;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.3);
}

body.dark nav#mobile-navigation.mobile-nav-drawer {
  background: #0f172a;
  box-shadow: 12px 0 40px rgba(0, 0, 0, 0.6);
}

body.dark .drawer-header {
  background: #0f172a;
  border-bottom-color: #1e293b;
}

body.dark .drawer-branding .drawer-title {
  color: #f1f5f9;
}

body.dark .drawer-close-btn {
  background: #1e293b;
  color: #94a3b8;
}

body.dark .drawer-close-btn:hover {
  color: #f1f5f9;
  background: rgba(255, 255, 255, 0.1);
}

body.dark nav#mobile-navigation li {
  border-bottom-color: #1e293b;
}

body.dark nav#mobile-navigation li a {
  color: #f1f5f9;
}

body.dark nav#mobile-navigation li a:hover,
body.dark nav#mobile-navigation li a:focus {
  color: var(--color-primary, #60a5fa);
  background-color: rgba(255, 255, 255, 0.06);
}

body.dark .submenu-toggle {
  color: #94a3b8;
}

body.dark .submenu-toggle:hover {
  color: #f1f5f9;
  background-color: rgba(255, 255, 255, 0.06);
}

body.dark nav#mobile-navigation .sub-menu,
body.dark nav#mobile-navigation .children {
  background: #1e293b;
  border-top-color: #334155;
}

body.dark nav#mobile-navigation .sub-menu li a,
body.dark nav#mobile-navigation .children li a {
  color: #cbd5e1;
}

/* Responsive Media Queries */
@media (max-width: 991px) {
  nav#site-navigation,
  .menu-bar {
    display: none !important;
  }

  .mobile-menu-bar {
    display: block;
  }
}

@media (min-width: 992px) {
  .mobile-menu-bar,
  .mobile-menu-overlay,
  nav#mobile-navigation.mobile-nav-drawer {
    display: none !important;
  }

  nav#site-navigation {
    display: block;
  }
}