/*
 * CBT Flow Header & Drawer Styles
 * Uses foundation.css variables and patterns
 *
 * @package CBTFlow
 */

/* =============================================
   HEADER VARIABLES
   ============================================= */

:root {
  --header-gap: 14px;
  --header-shadow: 0 12px 32px rgba(0, 0, 0, 0.10);
}

/* =============================================
   HEADER CONTAINER - ALWAYS TRANSPARENT
   ============================================= */

.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--header-height);
  padding-block: 0;
  z-index: 100;
  overflow: visible;
}

/* Glass effect appears only after scrolling */
.site-header--sticky.is-scrolled .site-header__inner {
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
}

/* Light header glass tint */
.site-header--light.site-header--sticky.is-scrolled .site-header__inner {
  background: color-mix(in srgb, var(--white) 50%, transparent);
}

/* Dark header glass tint */
.site-header--dark.site-header--sticky.is-scrolled .site-header__inner {
  background: color-mix(in srgb, var(--base) 20%, transparent);
}

/* =============================================
   HEADER INNER LAYOUT
   ============================================= */

.site-header__inner {
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: var(--header-gap);
  transition: background var(--transition), backdrop-filter var(--transition), -webkit-backdrop-filter var(--transition), margin-top var(--transition), border-radius var(--transition);
}

/* =============================================
   BRANDING / LOGO
   ============================================= */

.site-header__brand {
  display: flex;
  align-items: center;
  min-width: 0;
}

.custom-logo-link {
  display: inline-grid;
  align-items: center;
  text-decoration: none;
}

img.custom-logo {
  display: block;
  width: auto;
  height: 50px;
  max-width: 210px;
  grid-area: 1 / 1;
  transition: opacity var(--transition);
}

/* Logo for light backgrounds (dark logo) - shown on light header */
.custom-logo--light {
  opacity: 1;
}

.custom-logo--dark {
  opacity: 0;
}

/* Swap logos on dark header */
.site-header--dark .custom-logo--light {
  opacity: 0;
}

.site-header--dark .custom-logo--dark {
  opacity: 1;
}

.site-title {
  font-weight: 700;
  text-decoration: none;
  letter-spacing: -0.02em;
  font-size: var(--text-l);
  line-height: 1;
  white-space: nowrap;
  transition: color var(--transition);
}

@media (max-width: 480px) {
  img.custom-logo {
    height: 26px;
    max-height: 26px;
    max-width: 140px;
  }
}

/* =============================================
   DESKTOP NAVIGATION
   ============================================= */

.site-header__nav {
  display: none;
}

@media (min-width: 768px) {
  .site-header__nav {
    display: block;
  }
}

.site-nav__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  align-items: center;
  gap: 8px;
}

.site-nav__list a {
  display: block;
  padding: 8px 16px;
  text-decoration: none;
  font-weight: 700;
  font-size: var(--text-s);
  border-radius: var(--radius-s);
  transition: background var(--transition), opacity var(--transition), color var(--transition);
}

.site-nav__list a:hover {
  color: var(--base-semi-dark);
}

.site-nav__list .current-menu-item > a,
.site-nav__list .current_page_item > a {
  opacity: 1;
}

/* Parent menu item arrow indicator */
.site-nav__list .menu-item-has-children > a {
  display: flex;
  align-items: center;
  gap: 6px;
}

.site-nav__list .menu-item-has-children > a::after {
  content: '';
  display: block;
  width: 5px;
  height: 5px;
  border-right: 1.5px solid currentColor;
  border-bottom: 1.5px solid currentColor;
  transform: rotate(45deg);
  transition: transform var(--transition);
}

.site-nav__list .menu-item-has-children:hover > a::after {
  transform: rotate(45deg);
}

/* Mega-menu */
.site-nav__list li {
  position: relative;
}

.site-nav__list .menu-item-has-children {
  position: static;
}

header.site-header #menu-top-menu.site-nav__list .sub-menu {
  position: absolute;
  top: 100%;
  left: 0;
  right: 0;
  list-style: none;
  margin: 0;
  padding-inline: max(var(--gutter), calc((100% - (min(var(--content-width), calc(100% - (var(--gutter) * 2))) + 300px)) / 2));
  padding-block: var(--grid-gap);
  background: #fff;
  border-top: var(--border);
  border-bottom: var(--border);
  grid-column: full;
  display: grid;
  column-gap: var(--grid-gap);
  row-gap: var(--grid-gap);
  grid-template-columns: var(--grid-4);
  grid-template-rows: 1fr;
  opacity: 0;
  visibility: hidden;
  transform: translateY(-8px);
  pointer-events: none;
  transition: opacity 0.25s ease, transform 0.25s ease, visibility 0.25s;
}

header.site-header #menu-top-menu.site-nav__list .menu-item-has-children:hover > .sub-menu {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
  pointer-events: auto;
}

/* Invisible bridge so cursor can travel from nav item to mega-menu */
.site-nav__list .sub-menu::before {
  content: '';
  position: absolute;
  bottom: 100%;
  left: 0;
  right: 0;
  height: 40px;
}

header.site-header #menu-top-menu .sub-menu li a {
  color: var(--base);
  text-align: center;
  height: 100%;
  display: flex;
  justify-content: center;
  font-weight: 600;
  min-height: 10rem;
}

header.site-header #menu-top-menu .sub-menu li a:hover {
  color: var(--primary);
  background: var(--bg-ultra-light);
}

/* =============================================
   HEADER UTILITIES
   ============================================= */

.site-header__utils {
  justify-self: end;
  display: flex;
  align-items: center;
  gap: 10px;
}

/* =============================================
   THREE DOTS MENU TOGGLE
   ============================================= */

.menu-toggle {
  position: relative;
  right: -22px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 4px;
  width: 44px;
  height: 44px;
  padding: 0;
  margin: 0;
  cursor: pointer;
  background: transparent;
  border: 0;
  border-radius: 999px;
  transition: background var(--transition), transform var(--transition), color var(--transition);
}

.menu-toggle:hover {
  background: rgba(128, 128, 128, 0.1);
}

.menu-toggle:active {
  transform: scale(0.95);
}

.menu-toggle:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}

.menu-toggle__dot {
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background-color: currentColor;
  transition: transform var(--transition), opacity var(--transition);
}

/* Active state - three dots merge into one larger dot */
.menu-toggle.active {
  position: relative;
  z-index: 10000;
  color: var(--modal-text, #ffffff);
}

.menu-toggle.active .menu-toggle__dot:nth-child(1) {
  transform: translateY(9px);
  opacity: 0;
}

.menu-toggle.active .menu-toggle__dot:nth-child(2) {
  transform: scale(2);
}

.menu-toggle.active .menu-toggle__dot:nth-child(3) {
  transform: translateY(-9px);
  opacity: 0;
}

/* =============================================
   HEADER POSITION LOGIC
   ============================================= */

.site-header--logo-center .site-header__inner {
  grid-template-columns: 1fr auto 1fr;
}

.site-header--logo-center .site-header__brand {
  grid-column: 2;
  justify-content: center;
}

.site-header--logo-center .site-header__nav {
  grid-column: 1;
  justify-self: end;
}

.site-header--logo-center .site-header__utils {
  grid-column: 3;
  justify-self: end;
}

.site-header--menu-right .site-header__nav {
  justify-self: end;
}

.site-header--menu-right .site-nav__list {
  justify-content: flex-end;
}

.site-header--menu-center .site-header__nav {
  justify-self: center;
}

.site-header--menu-center .site-nav__list {
  justify-content: center;
}

/* =============================================
   HEADER VARIANTS (TEXT COLOR ONLY)
   ============================================= */

/* Light variant - dark text on light backgrounds */
.site-header--light .site-title,
.site-header--light .menu-toggle,
.site-header--light .site-nav__list a {
  color: var(--base);
}

/* Dark variant - light text on dark backgrounds */
.site-header--dark .site-title,
.site-header--dark .menu-toggle,
.site-header--dark .site-nav__list a {
  color: #ffffff;
}

/* =============================================
   FULLSCREEN MENU MODAL
   ============================================= */

html.is-menu-open {
  overflow: hidden;
  position: fixed;
  width: 100%;
  height: 100%;
}

.site-menu-modal[hidden] {
  display: none;
}

.site-menu-modal {
  position: fixed;
  inset: 0;
  z-index: 9998;
  background: var(--bg-light);

  opacity: 0;
  visibility: hidden;
  transition: opacity var(--transition), visibility var(--transition);
}

html.is-menu-open .site-menu-modal {
  opacity: 1;
  visibility: visible;
}

/* Elevate header bar above modal so toggle dot is clickable */
html.is-menu-open .site-header__inner {
  position: relative;
  z-index: 9999;
}

/* Hide logo and nav when modal is open - only close icon remains */
html.is-menu-open .site-header__brand,
html.is-menu-open .site-header__nav {
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transition: opacity var(--transition), visibility var(--transition);
}

/* Remove glass effect when modal is open (would paint over modal otherwise) */
html.is-menu-open .site-header--sticky.is-scrolled .site-header__inner {
  background: transparent;
  backdrop-filter: none;
  -webkit-backdrop-filter: none;
}

/* =============================================
   MENU MODAL CONTENT
   ============================================= */

.site-menu-modal__content {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  justify-content: center;
  min-height: 100vh;
  padding-block: calc(var(--header-height) + 40px) 40px;
}

/* =============================================
   MENU MODAL NAVIGATION
   ============================================= */

.site-menu-modal__nav {
  width: 100%;
  max-width: 600px;
  margin-bottom: 40px;
}

.site-menu-modal__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: var(--space-m);
  align-items: flex-start;
}

.site-menu-modal__list a {
  display: block;
  text-align: left;
  text-decoration: none;
  color: var(--base);
  font-family: var(--heading-font-family);
  font-weight: 600;
  font-size: var(--text-xxl);
  line-height: 1;
  transition: opacity var(--transition), transform var(--transition);

  /* Staggered fade-in animation */
  opacity: 0;
  transform: translateY(20px);
  animation: fadeSlideIn 0.4s ease-out forwards;
}

.site-menu-modal__list li:nth-child(1) a { animation-delay: 0.05s; }
.site-menu-modal__list li:nth-child(2) a { animation-delay: 0.1s; }
.site-menu-modal__list li:nth-child(3) a { animation-delay: 0.15s; }
.site-menu-modal__list li:nth-child(4) a { animation-delay: 0.2s; }
.site-menu-modal__list li:nth-child(5) a { animation-delay: 0.25s; }
.site-menu-modal__list li:nth-child(6) a { animation-delay: 0.3s; }
.site-menu-modal__list li:nth-child(7) a { animation-delay: 0.35s; }
.site-menu-modal__list li:nth-child(8) a { animation-delay: 0.4s; }

@keyframes fadeSlideIn {
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.site-menu-modal__list a:hover {
  opacity: 0.6;
}

.site-menu-modal__list .current-menu-item > a,
.site-menu-modal__list .current_page_item > a {
  opacity: 0.6;
}

/* =============================================
   MENU MODAL UTILITIES
   ============================================= */

.site-menu-modal__utils {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 16px;
  margin-top: 20px;
  color: var(--modal-text, #ffffff);

  opacity: 0;
  transform: translateY(20px);
  animation: fadeSlideIn 0.4s ease-out 0.45s forwards;
}

.site-menu-modal__utils .btn {
  min-width: 200px;
  text-align: center;
}

/* =============================================
   SKIP LINK (ACCESSIBILITY)
   ============================================= */

.skip-link {
  position: absolute;
  top: -999px;
  left: -999px;
}

.skip-link:focus {
  position: fixed;
  top: 10px;
  left: 10px;
  z-index: 100000;
  padding: 10px 15px;
  background: var(--color-bg-body);
  color: var(--color-primary);
  text-decoration: none;
  border: 2px solid var(--color-primary);
  border-radius: var(--radius-s);
}