/**
 * The Technical Navigator Classic Theme - Main Stylesheet
 * 
 * Strict 1200px container boundaries, Apple minimalist aesthetics,
 * modular Bento Grid, Layout Shortcodes, SEO/AI FAQ accordion,
 * and zero-overflow responsive mobile header & drawer.
 *
 * @package Tecnavigator_Classic
 * @version 3.0.0
 */

/* ==========================================================================
   1. STRICT 1200PX CONTAINER & LAYOUT BOUNDS
   ========================================================================== */
.tn-container,
.header-inner,
.footer-inner,
.tn-section-inner {
  max-width: 1200px !important;
  margin-left: auto !important;
  margin-right: auto !important;
  padding-left: 24px !important;
  padding-right: 24px !important;
  width: 100% !important;
  box-sizing: border-box !important;
}

.tn-section-full {
  width: 100%;
  max-width: 100%;
  margin-left: 0 !important;
  margin-right: 0 !important;
  box-sizing: border-box !important;
}

/* ==========================================================================
   2. HEADER & FROSTED NAVIGATION
   ========================================================================== */
.site-header.tn-header {
  position: sticky;
  top: 0;
  z-index: 9999;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: saturate(180%) blur(20px);
  -webkit-backdrop-filter: saturate(180%) blur(20px);
  border-bottom: 1px solid rgba(0, 0, 0, 0.08);
  padding: 12px 0;
  transition: all 0.25s ease;
  width: 100%;
  box-sizing: border-box;
}

.site-header.scrolled {
  background: rgba(255, 255, 255, 0.98);
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.06);
}

.header-inner {
  display: flex !important;
  align-items: center !important;
  justify-content: space-between !important;
  gap: 16px;
  box-sizing: border-box !important;
}

.tn-brand {
  display: flex !important;
  align-items: center !important;
  gap: 10px !important;
  text-decoration: none !important;
  color: var(--tn-graphite) !important;
  font-weight: 700 !important;
  font-size: 1.25rem !important;
  letter-spacing: -0.02em !important;
  max-width: 280px !important;
  flex-shrink: 0 !important;
}

.custom-logo-link {
  display: flex !important;
  align-items: center !important;
  text-decoration: none !important;
  max-height: 52px !important;
  max-width: 270px !important;
  overflow: hidden !important;
}

.custom-logo,
.custom-logo-link img,
.tn-brand img,
.site-header img {
  max-height: 52px !important;
  width: auto !important;
  max-width: 270px !important;
  object-fit: contain !important;
  display: block !important;
}

.tn-brand:hover {
  text-decoration: none;
  opacity: 0.9;
}

.tn-brand-logo {
  width: 40px !important;
  height: 40px !important;
  background: var(--tn-blue) !important;
  border-radius: 10px !important;
  display: flex !important;
  align-items: center !important;
  justify-content: center !important;
  color: #FFFFFF !important;
  font-weight: bold !important;
  font-size: 17px !important;
  flex-shrink: 0 !important;
}

.tn-brand-text {
  font-weight: 700 !important;
  font-size: 1.25rem !important;
  letter-spacing: -0.02em !important;
  color: var(--tn-graphite) !important;
  white-space: nowrap !important;
}

/* Desktop Navigation (Centered, Strict Single-Line) */
.nav-desktop,
.tn-nav-desktop {
  display: flex !important;
  align-items: center !important;
  flex: 1 1 auto !important;
  justify-content: center !important;
  white-space: nowrap !important;
}

.nav-desktop ul.tn-nav-menu,
.nav-desktop ul.menu {
  display: flex !important;
  align-items: center !important;
  justify-content: center !important;
  gap: 2px !important;
  list-style: none !important;
  margin: 0 !important;
  padding: 0 !important;
  flex-wrap: nowrap !important;
  white-space: nowrap !important;
}

.nav-desktop ul.tn-nav-menu > li,
.nav-desktop ul.menu > li {
  position: relative !important;
  list-style: none !important;
  margin: 0 !important;
}

.nav-desktop ul.tn-nav-menu > li > a,
.nav-desktop ul.menu > li > a {
  color: var(--tn-graphite) !important;
  font-size: 14px !important;
  font-weight: 500 !important;
  padding: 7px 12px !important;
  border-radius: var(--tn-radius-pill) !important;
  text-decoration: none !important;
  transition: all var(--tn-duration-fast) var(--tn-ease-apple) !important;
  display: inline-flex !important;
  align-items: center !important;
  white-space: nowrap !important;
  line-height: 1.2 !important;
}

.nav-desktop ul.tn-nav-menu > li > a:hover,
.nav-desktop ul.tn-nav-menu > li.current-menu-item > a,
.nav-desktop ul.menu > li > a:hover,
.nav-desktop ul.menu > li.current-menu-item > a {
  color: var(--tn-blue) !important;
  background: rgba(0, 102, 204, 0.08) !important;
}

/* Dropdowns */
.nav-desktop li.menu-item-has-children > a::after,
.nav-desktop li.page_item_has_children > a::after {
  content: " ▾";
  font-size: 11px;
  margin-left: 4px;
  color: var(--tn-gray);
  display: inline-block;
  transition: transform 0.2s ease;
}

.nav-desktop li.menu-item-has-children:hover > a::after,
.nav-desktop li.page_item_has_children:hover > a::after {
  transform: rotate(180deg);
  color: var(--tn-blue);
}

.nav-desktop .sub-menu {
  display: none !important;
  position: absolute !important;
  top: calc(100% + 4px) !important;
  left: 0 !important;
  min-width: 220px !important;
  background: rgba(255, 255, 255, 0.98) !important;
  backdrop-filter: blur(20px) !important;
  -webkit-backdrop-filter: blur(20px) !important;
  border: 1px solid rgba(0, 0, 0, 0.08) !important;
  border-radius: 12px !important;
  box-shadow: 0 12px 36px rgba(0, 0, 0, 0.12), 0 2px 6px rgba(0, 0, 0, 0.04) !important;
  padding: 8px !important;
  margin: 0 !important;
  list-style: none !important;
  z-index: 99999 !important;
}

.nav-desktop li:hover > .sub-menu,
.nav-desktop li:focus-within > .sub-menu {
  display: flex !important;
  flex-direction: column !important;
  animation: tnDropdownFadeIn 0.2s cubic-bezier(0.16, 1, 0.3, 1) forwards !important;
}

.nav-desktop .sub-menu > li > a {
  display: block !important;
  padding: 8px 14px !important;
  font-size: 13.5px !important;
  font-weight: 500 !important;
  color: var(--tn-graphite) !important;
  border-radius: 8px !important;
  text-decoration: none !important;
  white-space: nowrap !important;
  transition: all 0.15s ease !important;
}

.nav-desktop .sub-menu > li > a:hover {
  background: rgba(0, 102, 204, 0.08) !important;
  color: var(--tn-blue) !important;
}

@keyframes tnDropdownFadeIn {
  from { opacity: 0; transform: translateY(-6px); }
  to { opacity: 1; transform: translateY(0); }
}

/* Header Action Buttons */
.tn-header-actions {
  display: flex !important;
  align-items: center !important;
  gap: 10px !important;
  flex-shrink: 0 !important;
}

.tn-btn-phone {
  background-color: rgba(0, 102, 204, 0.08) !important;
  color: var(--tn-blue) !important;
  border: 1px solid rgba(0, 102, 204, 0.2) !important;
  font-weight: 600 !important;
  font-size: 14px !important;
  padding: 8px 16px !important;
  border-radius: var(--tn-radius-pill) !important;
  display: inline-flex !important;
  align-items: center !important;
  gap: 6px !important;
  text-decoration: none !important;
  transition: all 0.2s ease !important;
  white-space: nowrap !important;
}

.tn-btn-phone:hover {
  background-color: var(--tn-blue) !important;
  color: #FFFFFF !important;
  border-color: var(--tn-blue) !important;
}

/* Animated Hamburger Toggle Button */
.tn-mobile-toggle-btn {
  display: none;
  background: var(--tn-offwhite) !important;
  border: 1px solid var(--tn-border) !important;
  border-radius: 8px !important;
  width: 40px !important;
  height: 40px !important;
  padding: 0 !important;
  cursor: pointer !important;
  align-items: center !important;
  justify-content: center !important;
  transition: all var(--tn-duration-fast) var(--tn-ease-apple) !important;
  flex-shrink: 0 !important;
}

.tn-mobile-toggle-btn:hover {
  background: var(--tn-offwhite-alt) !important;
  border-color: var(--tn-border-dark) !important;
}

.tn-burger-icon {
  width: 18px;
  height: 14px;
  position: relative;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.tn-burger-bar {
  width: 100%;
  height: 2px;
  background: var(--tn-graphite);
  border-radius: 2px;
  transition: all 0.25s cubic-bezier(0.16, 1, 0.3, 1);
  transform-origin: center;
}

/* Animated Hamburger -> 'X' state */
.tn-mobile-toggle-btn[aria-expanded="true"] .tn-burger-bar:nth-child(1) {
  transform: translateY(6px) rotate(45deg);
}

.tn-mobile-toggle-btn[aria-expanded="true"] .tn-burger-bar:nth-child(2) {
  opacity: 0;
  transform: scaleX(0);
}

.tn-mobile-toggle-btn[aria-expanded="true"] .tn-burger-bar:nth-child(3) {
  transform: translateY(-6px) rotate(-45deg);
}

/* ==========================================================================
   3. MOBILE NAVIGATION DRAWER (Apple Off-White Aesthetic)
   ========================================================================== */
.tn-mobile-drawer {
  display: none !important;
  position: absolute !important;
  top: 100% !important;
  left: 0 !important;
  right: 0 !important;
  width: 100% !important;
  background: #F5F5F7 !important;
  border-bottom: 1px solid var(--tn-border) !important;
  box-shadow: 0 16px 36px rgba(0, 0, 0, 0.12) !important;
  z-index: 99999 !important;
  box-sizing: border-box !important;
  max-height: calc(100vh - 70px);
  overflow-y: auto;
}

.tn-mobile-drawer.is-active {
  display: block !important;
  animation: tnDrawerSlide 0.28s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

@keyframes tnDrawerSlide {
  from {
    opacity: 0;
    transform: translateY(-8px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.tn-mobile-drawer-inner {
  padding: 20px 24px 28px 24px;
  max-width: 1200px;
  margin: 0 auto;
}

.tn-mobile-nav ul.tn-mobile-menu,
.tn-mobile-nav ul.menu {
  list-style: none !important;
  margin: 0 !important;
  padding: 0 !important;
  display: flex !important;
  flex-direction: column !important;
  width: 100% !important;
}

.tn-mobile-nav ul > li,
.tn-mobile-nav ul.tn-mobile-menu > li,
.tn-mobile-nav ul.menu > li {
  width: 100% !important;
  margin: 0 !important;
  list-style: none !important;
}

.tn-mobile-nav ul > li > a,
.tn-mobile-nav ul.tn-mobile-menu > li > a,
.tn-mobile-nav ul.menu > li > a {
  padding: 13px 0 !important;
  font-size: 16px !important;
  font-weight: 500 !important;
  color: var(--tn-graphite) !important;
  text-decoration: none !important;
  border-bottom: 1px solid rgba(0, 0, 0, 0.06) !important;
  display: flex !important;
  align-items: center !important;
  justify-content: space-between !important;
  width: 100% !important;
  transition: color 0.15s ease !important;
}

.tn-mobile-nav ul > li > a:hover,
.tn-mobile-nav ul > li.current-menu-item > a {
  color: var(--tn-blue) !important;
}

.tn-mobile-nav .sub-menu {
  list-style: none !important;
  padding-left: 16px !important;
  margin: 4px 0 8px 0 !important;
  border-left: 2px solid var(--tn-blue) !important;
}

.tn-mobile-nav .sub-menu li a {
  font-size: 14.5px !important;
  padding: 9px 0 !important;
  color: var(--tn-gray-dark) !important;
  border-bottom: 1px dashed rgba(0, 0, 0, 0.05) !important;
}

.tn-mobile-drawer-actions {
  margin-top: 18px;
  padding-top: 18px;
  border-top: 1px solid rgba(0, 0, 0, 0.08);
  display: flex;
  flex-direction: column;
  gap: 10px;
}

/* ==========================================================================
   4. SHORTCODE LAYOUT & GRID ENGINES
   ========================================================================== */
.row_2_grid {
  display: flex !important;
  flex-direction: row !important;
  flex-wrap: wrap !important;
  gap: 24px !important;
  width: 100% !important;
  max-width: 1200px !important;
  margin: 0 auto 24px auto !important;
}

.row_2_grid > p {
  display: contents !important;
}

.row_2_grid .col_item,
.row_2_grid > div,
.row_2_grid > p > .col_item {
  width: calc(50% - 12px) !important;
  flex: 0 0 calc(50% - 12px) !important;
  max-width: calc(50% - 12px) !important;
  box-sizing: border-box !important;
}

.col_item {
  width: 100% !important;
  display: flex !important;
  flex-direction: column !important;
}

.col_item > * {
  width: 100% !important;
  max-width: 100% !important;
  box-sizing: border-box !important;
}

.tn-row,
.row_2,
.row-2,
.row_3,
.row-3,
.row_4,
.row-4 {
  display: grid;
  gap: 24px;
  width: 100%;
  margin-bottom: 24px;
  box-sizing: border-box;
}

.tn-row-2,
.row_2,
.row-2 {
  grid-template-columns: repeat(2, 1fr);
}

.tn-row-3,
.row_3,
.row-3 {
  grid-template-columns: repeat(3, 1fr);
}

.tn-row-4,
.row_4,
.row-4 {
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}

.tn-col,
.col {
  width: 100% !important;
  display: flex;
  flex-direction: column;
  box-sizing: border-box;
}

.col_item > .tn-card,
.tn-col > .tn-card,
.col > .tn-card {
  height: 100%;
}

.tn-bento-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  width: 100%;
  margin-bottom: 32px;
}

.tn-process-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  width: 100%;
  margin-bottom: 32px;
}

.tn-faq-list {
  max-width: 860px;
  margin-left: auto;
  margin-right: auto;
  display: flex;
  flex-direction: column;
  gap: 16px;
  width: 100%;
}

/* ==========================================================================
   5. BENTO CARDS & SECTIONS
   ========================================================================== */
.tn-bento-card {
  padding: 30px 26px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  background: var(--tn-white);
  border-radius: var(--tn-radius-lg);
  border: 1px solid var(--tn-border);
  box-shadow: var(--tn-shadow-card);
  transition: transform var(--tn-duration-normal) var(--tn-ease-apple),
              box-shadow var(--tn-duration-normal) var(--tn-ease-apple),
              border-color var(--tn-duration-normal) var(--tn-ease-apple);
}

.tn-bento-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--tn-shadow-hover);
  border-color: var(--tn-border-dark);
}

.tn-bento-card h3 {
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: 8px;
  color: var(--tn-graphite);
}

.tn-bento-card p {
  font-size: 0.95rem;
  line-height: 1.55;
  color: var(--tn-gray);
  margin-bottom: 20px;
  flex-grow: 1;
}

.tn-process-card {
  padding: 28px 22px;
  background: var(--tn-white);
  border-radius: var(--tn-radius-lg);
  border: 1px solid var(--tn-border);
  box-shadow: var(--tn-shadow-subtle);
  position: relative;
}

.tn-step-circle {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--tn-blue-subtle);
  color: var(--tn-blue);
  font-weight: 700;
  font-size: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 16px;
}

/* FAQ Details/Summary */
details.tn-faq-item {
  background: var(--tn-white);
  border-radius: var(--tn-radius-md);
  border: 1px solid var(--tn-border);
  box-shadow: var(--tn-shadow-subtle);
  padding: 20px 24px;
  transition: all var(--tn-duration-fast) var(--tn-ease-apple);
  cursor: pointer;
}

details.tn-faq-item[open] {
  border-color: var(--tn-blue);
  box-shadow: var(--tn-shadow-card);
}

details.tn-faq-item summary {
  font-weight: 600;
  font-size: 1.08rem;
  color: var(--tn-graphite);
  list-style: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  outline: none;
  cursor: pointer;
  user-select: none;
}

details.tn-faq-item summary::-webkit-details-marker {
  display: none;
}

details.tn-faq-item summary::after {
  content: "+";
  font-size: 1.4rem;
  font-weight: 400;
  color: var(--tn-blue);
  line-height: 1;
  transition: transform 0.2s ease;
}

details.tn-faq-item[open] summary::after {
  content: "−";
  transform: rotate(180deg);
}

.tn-faq-content {
  margin-top: 14px;
  font-size: 0.95rem;
  line-height: 1.6;
  color: var(--tn-gray);
}

.tn-faq-content p:last-child {
  margin-bottom: 0;
}

/* Hero & CTA */
.tn-hero-section {
  background: radial-gradient(circle at 50% 0%, rgba(0, 102, 204, 0.08) 0%, rgba(245, 245, 247, 0) 70%);
  padding: 70px 0 80px 0;
  text-align: center;
}

.tn-hero-content {
  max-width: 860px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.tn-hero-title {
  margin: 14px 0 18px 0;
  font-size: clamp(2.2rem, 4.5vw + 0.5rem, 3.8rem);
}

.tn-hero-subtitle {
  font-size: 1.2rem;
  line-height: 1.5;
  color: var(--tn-gray);
  max-width: 680px;
  margin-bottom: 28px;
}

.tn-hero-buttons {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 14px;
  flex-wrap: wrap;
  margin-bottom: 40px;
}

.tn-cta-banner {
  background-color: var(--tn-dark-bg);
  color: #FFFFFF;
  padding: 75px 0;
  text-align: center;
}

.tn-cta-inner {
  max-width: 760px;
  margin: 0 auto;
}

.tn-cta-inner h2 {
  color: #FFFFFF;
  margin: 14px 0;
}

.tn-cta-inner p {
  color: #F5F5F7;
  opacity: 0.88;
  font-size: 1.15rem;
  margin-bottom: 30px;
}

/* Split Grid for Contact & About */
.tn-split-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: center;
}

.tn-stats-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  margin: 32px 0;
}

.tn-stat-num {
  font-size: 2.2rem;
  font-weight: 800;
  color: var(--tn-blue);
  line-height: 1.1;
}

.tn-stat-label {
  font-size: 0.875rem;
  color: var(--tn-gray);
  font-weight: 500;
}


/* ==========================================================================
   6. RESPONSIVE BREAKPOINTS & MOBILE HEADER FIX
   ========================================================================== */
@media (max-width: 1024px) {
  .tn-bento-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .tn-row-3 {
    grid-template-columns: repeat(2, 1fr);
  }
}

/* Main Mobile Breakpoint (<= 768px) */
@media (max-width: 768px) {
  html, body {
    overflow-x: hidden !important;
    width: 100% !important;
  }

  .site-header.tn-header {
    padding: 10px 0 !important;
    width: 100% !important;
    box-sizing: border-box !important;
    overflow-x: hidden !important;
  }

  .header-inner {
    padding-left: 16px !important;
    padding-right: 16px !important;
    max-width: 100% !important;
    gap: 8px !important;
    box-sizing: border-box !important;
  }

  /* Left: Tech Navigator Logo + Icon (max-height: 36px) */
  .tn-brand {
    max-width: 180px !important;
    gap: 8px !important;
  }

  .custom-logo-link {
    max-height: 36px !important;
    max-width: 160px !important;
  }

  .custom-logo,
  .custom-logo-link img,
  .tn-brand img,
  .site-header img {
    max-height: 36px !important;
    width: auto !important;
    max-width: 160px !important;
    object-fit: contain !important;
  }

  .tn-brand-logo {
    width: 34px !important;
    height: 34px !important;
    font-size: 14px !important;
    border-radius: 8px !important;
  }

  .tn-brand-text {
    font-size: 1.05rem !important;
  }

  /* Hide Desktop Nav & Desktop Button */
  .nav-desktop,
  .tn-nav-desktop,
  .tn-header-actions .nav-desktop {
    display: none !important;
  }

  /* Center/Right: Compact Phone Icon Button */
  .tn-header-actions {
    gap: 8px !important;
  }

  .tn-btn-phone {
    padding: 7px 11px !important;
    font-size: 13px !important;
    line-height: 1 !important;
    gap: 4px !important;
    border-radius: var(--tn-radius-pill) !important;
  }

  .tn-btn-phone .tn-phone-text {
    display: inline-block;
  }

  /* Far Right: Animated Hamburger Toggle */
  .tn-mobile-toggle-btn {
    display: inline-flex !important;
    width: 38px !important;
    height: 38px !important;
  }

  /* Single-column auto stacking for ALL grids on mobile */
  .row_2_grid .col_item,
  .row_2_grid > div,
  .row_2_grid > p > .col_item {
    width: 100% !important;
    flex: 0 0 100% !important;
    max-width: 100% !important;
  }

  .tn-row-2,
  .row_2,
  .row-2,
  .tn-row-3,
  .row_3,
  .row-3,
  .tn-row-4,
  .row_4,
  .row-4,
  .tn-bento-grid,
  .tn-process-grid,
  .tn-split-grid {
    grid-template-columns: 1fr !important;
    gap: 20px !important;
  }

  .tn-hero-section {
    padding: 50px 0 60px 0;
  }

  .tn-hero-buttons {
    flex-direction: column;
    width: 100%;
  }

  .tn-hero-buttons .tn-btn {
    width: 100%;
  }

  .tn-footer-grid {
    grid-template-columns: 1fr 1fr !important;
    gap: 30px !important;
  }
}

/* Extra Compact Mobile (< 480px) */
@media (max-width: 480px) {
  .header-inner {
    padding-left: 12px !important;
    padding-right: 12px !important;
  }

  .tn-brand-text {
    font-size: 0.95rem !important;
  }

  .tn-btn-phone {
    padding: 6px 9px !important;
    font-size: 12px !important;
  }

  .tn-footer-grid {
    grid-template-columns: 1fr !important;
    gap: 24px !important;
  }
}