/**
 * PTT Modern Navigation Menu
 * A responsive, accessible mega-menu for ProTechTrader
 * Created: 2026-01-24
 */

/* ================================================
   CSS Custom Properties (Theme Variables)
   ================================================ */
:root {
  --ptt-primary: #4cb1ca;
  --ptt-primary-dark: #3a9ab3;
  --ptt-secondary: #f12b63;
  --ptt-text: #333333;
  --ptt-text-light: #666666;
  --ptt-bg: #ffffff;
  --ptt-bg-overlay: rgba(0, 0, 0, 0.5);
  --ptt-border: #e0e0e0;
  --ptt-shadow: 0 4px 20px rgba(0, 0, 0, 0.15);
  --ptt-transition: 0.25s ease;
  --ptt-menu-height: 50px;
  --ptt-z-menu: 1000;
  --ptt-z-overlay: 999;
  --ptt-z-hamburger: 1001;
}

/* ================================================
   Skip Navigation Link (Accessibility)
   ================================================ */
.ptt-skip-nav {
  position: absolute;
  top: -100px;
  left: 0;
  background: var(--ptt-primary);
  color: #fff;
  padding: 12px 24px;
  z-index: 10000;
  font-weight: 600;
  text-decoration: none;
  border-radius: 0 0 4px 0;
  transition: top var(--ptt-transition);
}

.ptt-skip-nav:focus {
  top: 0;
  outline: 3px solid var(--ptt-secondary);
  outline-offset: 2px;
}

/* ================================================
   Hamburger Button (Mobile)
   ================================================ */
.ptt-hamburger {
  display: none;
  position: fixed;
  top: 12px;
  left: 12px;
  z-index: var(--ptt-z-hamburger);
  width: 44px;
  height: 44px;
  padding: 10px;
  background: var(--ptt-primary);
  border: none;
  border-radius: 6px;
  cursor: pointer;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
  transition: background var(--ptt-transition), transform var(--ptt-transition);
}

.ptt-hamburger:hover,
.ptt-hamburger:focus {
  background: var(--ptt-primary-dark);
  outline: none;
}

.ptt-hamburger:focus-visible {
  outline: 3px solid var(--ptt-secondary);
  outline-offset: 2px;
}

.ptt-hamburger[aria-expanded="true"] {
  background: var(--ptt-secondary);
}

.ptt-hamburger-line {
  display: block;
  width: 24px;
  height: 3px;
  background: #fff;
  border-radius: 2px;
  margin: 4px 0;
  transition: transform var(--ptt-transition), opacity var(--ptt-transition);
}

.ptt-hamburger[aria-expanded="true"] .ptt-hamburger-line:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.ptt-hamburger[aria-expanded="true"] .ptt-hamburger-line:nth-child(2) {
  opacity: 0;
}

.ptt-hamburger[aria-expanded="true"] .ptt-hamburger-line:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* ================================================
   Mobile Menu Overlay
   ================================================ */
.ptt-menu-overlay {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: var(--ptt-bg-overlay);
  z-index: var(--ptt-z-overlay);
  opacity: 0;
  transition: opacity var(--ptt-transition);
  pointer-events: none;
}

.ptt-menu-overlay.ptt-visible {
  opacity: 1;
  pointer-events: auto;
}

/* ================================================
   Desktop Navigation Styles (768px+)
   ================================================ */
#categories.s_nav {
  position: relative;
}

#categories.s_nav > ul.ptt-menu-list {
  display: flex;
  flex-wrap: wrap;
  list-style: none;
  margin: 0;
  padding: 0;
  background: transparent;
}

#categories.s_nav > ul.ptt-menu-list > li {
  position: relative;
}

#categories.s_nav > ul.ptt-menu-list > li > a {
  display: flex;
  align-items: center;
  padding: 14px 18px;
  color: var(--ptt-text);
  text-decoration: none;
  font-weight: 500;
  font-size: 14px;
  transition: color var(--ptt-transition), background var(--ptt-transition);
  white-space: nowrap;
}

#categories.s_nav > ul.ptt-menu-list > li > a:hover,
#categories.s_nav > ul.ptt-menu-list > li > a:focus {
  color: var(--ptt-primary);
  background: rgba(76, 177, 202, 0.08);
}

#categories.s_nav > ul.ptt-menu-list > li.s_selected > a {
  color: var(--ptt-primary);
  border-bottom: 3px solid var(--ptt-primary);
}

/* Dropdown Arrow using CSS ::after (no HTML spans needed) */
#categories.s_nav > ul.ptt-menu-list > li.ptt-has-submenu > a::after {
  content: '';
  display: inline-block;
  width: 0;
  height: 0;
  margin-left: 8px;
  vertical-align: middle;
  border-left: 4px solid transparent;
  border-right: 4px solid transparent;
  border-top: 5px solid currentColor;
  transition: transform var(--ptt-transition);
}

#categories.s_nav > ul.ptt-menu-list > li.ptt-has-submenu:hover > a::after,
#categories.s_nav > ul.ptt-menu-list > li.ptt-has-submenu:focus-within > a::after {
  transform: rotate(180deg);
}

/* ================================================
   Mega Menu Dropdown (Desktop)
   ================================================ */
#categories.s_nav .s_submenu.ptt-mega-menu {
  position: absolute;
  top: 100%;
  left: 0;
  min-width: 320px;
  max-width: 600px;
  background: var(--ptt-bg);
  border: 1px solid var(--ptt-border);
  border-radius: 0 0 8px 8px;
  box-shadow: var(--ptt-shadow);
  opacity: 0;
  visibility: hidden;
  transform: translateY(-10px);
  transition: opacity var(--ptt-transition), transform var(--ptt-transition), visibility var(--ptt-transition);
  z-index: var(--ptt-z-menu);
  padding: 20px;
  display: flex;
  flex-wrap: wrap;
  gap: 20px;
}

#categories.s_nav li.ptt-has-submenu:hover > .s_submenu.ptt-mega-menu,
#categories.s_nav li.ptt-has-submenu:focus-within > .s_submenu.ptt-mega-menu {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

/* Menu Groups inside Mega Menu */
.ptt-mega-menu .s_menu_group {
  flex: 1 1 200px;
  min-width: 180px;
}

.ptt-mega-menu .s_menu_group h3 {
  font-size: 13px;
  font-weight: 700;
  color: var(--ptt-primary);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin: 0 0 12px 0;
  padding-bottom: 8px;
  border-bottom: 2px solid var(--ptt-primary);
}

.ptt-mega-menu .s_menu_group ul {
  list-style: none;
  margin: 0;
  padding: 0;
}

.ptt-mega-menu .s_menu_group ul li {
  margin: 0;
  padding: 0;
}

.ptt-mega-menu .s_menu_group ul li a {
  display: block;
  padding: 8px 0;
  color: var(--ptt-text);
  text-decoration: none;
  font-size: 14px;
  transition: color var(--ptt-transition), padding-left var(--ptt-transition);
  border-bottom: 1px solid #f5f5f5;
}

.ptt-mega-menu .s_menu_group ul li a:hover,
.ptt-mega-menu .s_menu_group ul li a:focus {
  color: var(--ptt-primary);
  padding-left: 8px;
}

.ptt-mega-menu .s_menu_group ul li:last-child a {
  border-bottom: none;
}

/* ================================================
   Mobile Styles (< 768px)
   ================================================ */
@media screen and (max-width: 767px) {
  .ptt-hamburger {
    display: block;
  }

  .ptt-menu-overlay {
    display: block;
  }

  /* Mobile navigation - slide-in panel */
  #main_navigation {
    position: fixed !important;
    top: 0 !important;
    left: -300px !important;
    width: 280px !important;
    height: 100vh !important;
    background: var(--ptt-bg) !important;
    z-index: var(--ptt-z-menu) !important;
    overflow-y: auto !important;
    overflow-x: hidden !important;
    transition: left var(--ptt-transition);
    box-shadow: 2px 0 20px rgba(0, 0, 0, 0.2);
    padding-top: 60px !important;
  }

  #main_navigation.ptt-menu-open {
    left: 0 !important;
  }

  #main_navigation .s_wrap,
  #main_navigation .s_col_12 {
    width: 100%;
    padding: 0;
    margin: 0;
    float: none;
  }

  #categories.s_nav {
    width: 100%;
    display: block;
  }

  #categories.s_nav > ul.ptt-menu-list {
    display: block;
    width: 100%;
  }

  #categories.s_nav > ul.ptt-menu-list > li {
    display: block !important;
    width: 100% !important;
    float: none !important;
    border-bottom: 1px solid var(--ptt-border);
  }

  #categories.s_nav > ul.ptt-menu-list > li > a {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 16px 20px;
    font-size: 15px;
  }

  #categories.s_nav > ul.ptt-menu-list > li.s_selected > a {
    border-bottom: none;
    background: rgba(76, 177, 202, 0.1);
  }

  /* Mobile Dropdown Arrow */
  #categories.s_nav > ul.ptt-menu-list > li.ptt-has-submenu > a {
    display: flex !important;
    justify-content: space-between;
    align-items: center;
  }

  #categories.s_nav > ul.ptt-menu-list > li.ptt-has-submenu > a::after {
    margin-left: auto;
    margin-right: 0;
  }

  li.ptt-submenu-open > a::after {
    transform: rotate(180deg);
  }

  /* Mobile Mega Menu - Accordion Style */
  #categories.s_nav .s_submenu.ptt-mega-menu {
    position: static !important;
    max-width: 100% !important;
    width: 100% !important;
    border: none !important;
    border-radius: 0 !important;
    box-shadow: none !important;
    padding: 0 !important;
    background: #f8f9fa !important;
    display: none !important;
    opacity: 1 !important;
    visibility: visible !important;
    transform: none !important;
    flex-direction: column;
    gap: 0;
  }

  #categories.s_nav li.ptt-submenu-open > .s_submenu.ptt-mega-menu {
    display: flex !important;
  }

  .ptt-mega-menu .s_menu_group {
    flex: none;
    width: 100%;
    min-width: 100%;
    padding: 15px 20px;
    border-bottom: 1px solid var(--ptt-border);
  }

  .ptt-mega-menu .s_menu_group:last-child {
    border-bottom: none;
  }

  .ptt-mega-menu .s_menu_group h3 {
    font-size: 12px;
    margin-bottom: 10px;
    padding-bottom: 6px;
  }

  .ptt-mega-menu .s_menu_group ul li a {
    padding: 10px 0;
    font-size: 14px;
  }

  /* Cart menu on mobile */
  #cart_menu.s_nav {
    position: fixed;
    top: 12px;
    right: 12px;
    z-index: var(--ptt-z-hamburger);
  }

  /* Body scroll lock when menu is open */
  body.ptt-menu-active {
    overflow: hidden;
  }
}

/* ================================================
   Tablet Adjustments (768px - 1024px)
   ================================================ */
@media screen and (min-width: 768px) and (max-width: 1024px) {
  #categories.s_nav > ul.ptt-menu-list > li > a {
    padding: 12px 12px;
    font-size: 13px;
  }

  .ptt-mega-menu .s_menu_group {
    flex: 1 1 150px;
    min-width: 150px;
  }
}

/* ================================================
   Focus Styles (Accessibility)
   ================================================ */
#categories.s_nav a:focus-visible {
  outline: 3px solid var(--ptt-primary);
  outline-offset: 2px;
}

.ptt-mega-menu .s_menu_group ul li a:focus-visible {
  outline: 2px solid var(--ptt-primary);
  outline-offset: 1px;
  background: rgba(76, 177, 202, 0.1);
}

/* ================================================
   Reduced Motion (Accessibility)
   ================================================ */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
  }
}

/* ================================================
   Print Styles
   ================================================ */
@media print {
  .ptt-hamburger,
  .ptt-menu-overlay,
  #main_navigation {
    display: none !important;
  }
}