/* ==========================================================================
   AD'S DIGITAL BUSINESS SOLUTIONS — CORE STYLESHEET (V2)
   Brand Kit V4 Compliant | Dual Theme (Light & Dark) Support
   Canonical Domain: https://adsdigitaltech.com
   ========================================================================== */

/* --------------------------------------------------------------------------
   1. RESET & BOX SIZING
   -------------------------------------------------------------------------- */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
  overflow-x: hidden;
  max-width: 100vw;
  width: 100%;
}

body {
  font-family: var(--font-sans);
  font-size: 1rem;
  line-height: 1.65;
  color: var(--text-primary);
  background-color: var(--bg-canvas);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
  max-width: 100vw;
  width: 100%;
  transition: background-color var(--transition-base), color var(--transition-base);
}

img, video, svg {
  display: block;
  max-width: 100%;
  height: auto;
}

a {
  color: var(--action-primary);
  text-decoration: none;
  transition: color var(--transition-fast);
}

a:hover {
  color: var(--action-hover);
}

button, input, textarea, select {
  font: inherit;
  color: inherit;
}

/* --------------------------------------------------------------------------
   2. TYPOGRAPHIC HIERARCHY
   -------------------------------------------------------------------------- */
h1, h2, h3, h4, h5, h6 {
  color: var(--text-primary);
  font-weight: normal;
  line-height: 1.2;
}

h1, .h1-display {
  font-family: var(--font-serif);
  font-size: clamp(2.375rem, 5vw, 3.75rem); /* 38px - 60px */
  line-height: 1.12;
  letter-spacing: -0.02em;
}

h2, .h2-section {
  font-family: var(--font-serif);
  font-size: clamp(1.85rem, 3.5vw, 2.75rem); /* 30px - 44px */
  line-height: 1.2;
  letter-spacing: -0.01em;
}

h3, .h3-card {
  font-family: var(--font-sans);
  font-size: clamp(1.2rem, 2vw, 1.45rem);
  font-weight: 600;
  line-height: 1.35;
  letter-spacing: -0.01em;
}

h4 {
  font-family: var(--font-sans);
  font-size: 1.05rem;
  font-weight: 600;
  line-height: 1.4;
}

p {
  color: var(--text-secondary);
  font-size: 1rem;
  line-height: 1.65;
}

p.lead-text {
  font-size: clamp(1.05rem, 1.5vw, 1.2rem);
  line-height: 1.6;
  color: var(--text-secondary);
}

.text-dark {
  color: var(--color-deepest-blue);
}

.text-white {
  color: var(--color-white);
}

.text-accent {
  color: var(--color-primary-blue);
}

.text-gradient {
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  display: inline-block;
}

/* --------------------------------------------------------------------------
   3. LAYOUT & CONTAINERS
   -------------------------------------------------------------------------- */
.container {
  width: 100%;
  max-width: var(--container-max-w);
  margin-left: auto;
  margin-right: auto;
  padding-left: var(--container-gutter);
  padding-right: var(--container-gutter);
  box-sizing: border-box;
}

@media (max-width: 768px) {
  .container {
    padding-left: 14px;
    padding-right: 14px;
  }
}

.container-narrow {
  max-width: 960px;
}

.section {
  padding-top: clamp(60px, 8vw, 100px);
  padding-bottom: clamp(60px, 8vw, 100px);
  position: relative;
}

.section-dark {
  background-color: var(--bg-dark-primary);
  color: #FFFFFF;
}

.section-dark h1,
.section-dark h2,
.section-dark h3,
.section-dark h4 {
  color: #FFFFFF;
}

.section-dark p {
  color: #A3C2D8;
}

.section-white {
  background-color: var(--bg-surface);
}

.section-ice {
  background-color: var(--bg-surface-subtle);
}

.section-header {
  margin-bottom: clamp(40px, 5vw, 64px);
  max-width: 780px;
}

.section-header.text-center {
  margin-left: auto;
  margin-right: auto;
  text-align: center;
}

.pill-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 14px;
  background-color: var(--color-ice-blue);
  color: var(--color-deep-blue);
  font-family: var(--font-sans);
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  border-radius: var(--radius-pill);
  margin-bottom: 16px;
  border: 1px solid rgba(112, 178, 206, 0.4);
}

[data-theme="dark"] .pill-badge {
  background-color: rgba(112, 178, 206, 0.15);
  color: #BBE3F5;
  border-color: rgba(112, 178, 206, 0.3);
}

.pill-badge.pill-dark {
  background-color: rgba(212, 234, 244, 0.12);
  color: #BBE3F5;
  border-color: rgba(112, 178, 206, 0.25);
}

/* Grids */
.grid {
  display: grid;
  gap: 24px;
}

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

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

.grid-4 {
  grid-template-columns: repeat(4, 1fr);
}

@media (max-width: 1024px) {
  .grid-4 {
    grid-template-columns: repeat(2, 1fr);
  }
  .grid-3 {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  .grid-4, .grid-3, .grid-2 {
    grid-template-columns: 1fr;
  }
}

/* --------------------------------------------------------------------------
   4. NAVIGATION & HEADER
   -------------------------------------------------------------------------- */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  background-color: var(--bg-header);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-subtle);
  transition: all var(--transition-base);
}

.site-header.header-scrolled {
  background-color: var(--bg-header-scrolled);
  box-shadow: var(--shadow-md);
  border-bottom-color: rgba(8, 129, 170, 0.2);
}

/* Transparent state when sitting on top of hero video */
.site-header.header-transparent {
  background-color: rgba(3, 49, 81, 0.82);
  border-bottom-color: rgba(255, 255, 255, 0.1);
}

.site-header.header-transparent .nav-link {
  color: #FFFFFF;
}

.site-header.header-transparent .nav-link:hover {
  color: #70B2CE;
}

.site-header.header-transparent .mobile-toggle {
  color: #FFFFFF;
}

.header-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 78px;
}

/* Logo handling (Switches dynamically between Light and Dark mode) */
.site-logo {
  display: flex;
  align-items: center;
  text-decoration: none;
}

.site-logo img {
  height: 50px;
  width: auto;
  object-fit: contain;
}

.site-logo .logo-dark {
  display: none;
}

.site-logo .logo-light {
  display: block;
}

/* When dark mode active OR header transparent over dark video */
[data-theme="dark"] .site-logo .logo-dark,
.site-header.header-transparent .site-logo .logo-dark {
  display: block;
}

[data-theme="dark"] .site-logo .logo-light,
.site-header.header-transparent .site-logo .logo-light {
  display: none;
}

.desktop-nav {
  display: flex;
  align-items: center;
  gap: 22px;
}

.nav-item {
  position: relative;
}

.nav-link {
  font-family: var(--font-sans);
  font-size: 0.925rem;
  font-weight: 500;
  color: var(--text-primary);
  padding: 10px 4px;
  display: flex;
  align-items: center;
  gap: 5px;
  transition: color var(--transition-fast);
}

.nav-link:hover, .nav-link.active {
  color: var(--action-primary);
}

.nav-link svg.chevron {
  width: 14px;
  height: 14px;
  transition: transform var(--transition-fast);
}

.nav-item:hover .nav-link svg.chevron {
  transform: rotate(180deg);
}

/* Mega Menu Dropdowns */
.mega-dropdown {
  position: absolute;
  top: 100%;
  left: 50%;
  transform: translateX(-50%) translateY(10px);
  background: var(--bg-surface);
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-card);
  box-shadow: var(--shadow-lg);
  padding: 24px;
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transition: all var(--transition-base);
  z-index: 1010;
  min-width: 680px;
}

.mega-dropdown.wide {
  min-width: 820px;
}

.nav-item:hover .mega-dropdown {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
  transform: translateX(-50%) translateY(0);
}

.mega-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
}

.mega-col-title {
  font-size: 0.78rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--color-deep-blue);
  margin-bottom: 12px;
  padding-bottom: 6px;
  border-bottom: 1px solid var(--border-subtle);
  display: flex;
  align-items: center;
  gap: 6px;
}

[data-theme="dark"] .mega-col-title {
  color: var(--color-light-blue);
}

.mega-link-item {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 8px 10px;
  border-radius: var(--radius-sm);
  transition: background var(--transition-fast);
  text-decoration: none;
}

.mega-link-item:hover {
  background-color: var(--bg-surface-subtle);
}

.mega-link-icon {
  width: 28px;
  height: 28px;
  border-radius: 6px;
  background-color: var(--color-ice-blue);
  color: var(--color-primary-blue);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

[data-theme="dark"] .mega-link-icon {
  background-color: rgba(112, 178, 206, 0.2);
  color: #BBE3F5;
}

.mega-link-title {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text-primary);
  line-height: 1.25;
}

.mega-link-desc {
  font-size: 0.78rem;
  color: var(--text-secondary);
  line-height: 1.35;
  margin-top: 2px;
}

/* Header Actions */
.header-actions {
  display: flex;
  align-items: center;
  gap: 12px;
}

/* THEME TOGGLE BUTTON (Sun/Moon) */
.theme-toggle-btn {
  background: var(--bg-surface-subtle);
  border: 1px solid var(--border-subtle);
  color: var(--text-primary);
  border-radius: var(--radius-pill);
  padding: 8px 12px;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  font-size: 0.8rem;
  font-weight: 600;
  transition: all var(--transition-fast);
}

.theme-toggle-btn:hover {
  border-color: var(--action-primary);
  color: var(--action-primary);
}

.theme-toggle-btn svg {
  width: 16px;
  height: 16px;
  flex-shrink: 0;
}

/* Explicit single icon display: Light mode shows moon, dark mode shows sun */
.theme-toggle-btn .icon-moon {
  display: block;
}

.theme-toggle-btn .icon-sun {
  display: none;
}

[data-theme="dark"] .theme-toggle-btn .icon-moon {
  display: none;
}

[data-theme="dark"] .theme-toggle-btn .icon-sun {
  display: block;
}

/* Mobile Hamburger Toggle */
.mobile-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
  color: var(--text-primary);
}

.mobile-toggle svg {
  width: 26px;
  height: 26px;
}

/* Mobile Drawer */
.mobile-drawer {
  position: fixed;
  top: 72px;
  left: 0;
  width: 100%;
  height: calc(100vh - 72px);
  background: var(--bg-surface);
  transform: translateX(100%);
  transition: transform var(--transition-base), visibility var(--transition-base);
  z-index: 999;
  overflow-y: auto;
  padding: 24px;
  display: flex;
  flex-direction: column;
  gap: 14px;
  visibility: hidden;
  pointer-events: none;
}

.mobile-drawer.active {
  transform: translateX(0);
  visibility: visible;
  pointer-events: auto;
}

.mobile-nav-link {
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--text-primary);
  padding: 12px 0;
  border-bottom: 1px solid var(--border-subtle);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.mobile-submenu {
  display: none;
  padding-left: 14px;
  margin-top: 8px;
  margin-bottom: 8px;
}

.mobile-submenu.open {
  display: block;
}

.mobile-sub-link {
  display: block;
  padding: 8px 0;
  font-size: 0.9rem;
  color: var(--text-secondary);
}

.mobile-sub-link:hover {
  color: var(--action-primary);
}

@media (max-width: 1024px) {
  .desktop-nav {
    display: none;
  }
  .mobile-toggle {
    display: flex;
    align-items: center;
    justify-content: center;
  }
}

@media (max-width: 768px) {
  .site-header {
    height: 64px;
  }
  .header-container {
    height: 64px;
    padding-left: 14px;
    padding-right: 14px;
    gap: 8px;
    width: 100%;
    box-sizing: border-box;
  }
  .site-logo {
    display: flex;
    align-items: center;
    flex-shrink: 1;
    min-width: 0;
  }
  .site-logo img {
    height: 32px;
    max-width: 135px;
    width: auto;
    object-fit: contain;
    flex-shrink: 0;
  }
  .header-actions {
    gap: 8px;
    flex-shrink: 0;
    align-items: center;
  }
  .theme-toggle-btn {
    width: 34px;
    height: 34px;
    min-width: 34px;
    padding: 0;
    border-radius: 50%;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
  }
  .theme-toggle-btn svg {
    width: 16px;
    height: 16px;
  }
  .header-actions .btn-primary {
    padding: 7px 12px;
    font-size: 0.76rem;
    white-space: nowrap;
    line-height: 1.2;
    border-radius: var(--radius-pill);
    flex-shrink: 0;
  }
  .mobile-toggle {
    width: 36px;
    height: 36px;
    min-width: 36px;
    padding: 0;
    margin: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    border: none;
    background: transparent;
    cursor: pointer;
    color: var(--text-primary);
    flex-shrink: 0;
  }
  .mobile-toggle svg {
    width: 22px;
    height: 22px;
  }
  .mobile-drawer {
    top: 64px;
    height: calc(100vh - 64px);
    padding: 20px;
  }
}

@media (max-width: 380px) {
  .header-container {
    padding-left: 10px;
    padding-right: 10px;
    gap: 6px;
  }
  .site-logo img {
    height: 28px;
    max-width: 110px;
  }
  .header-actions {
    gap: 6px;
  }
  .theme-toggle-btn {
    width: 30px;
    height: 30px;
    min-width: 30px;
  }
  .theme-toggle-btn svg {
    width: 14px;
    height: 14px;
  }
  .header-actions .btn-primary {
    padding: 6px 8px;
    font-size: 0.70rem;
  }
  .mobile-toggle {
    width: 30px;
    height: 30px;
    min-width: 30px;
  }
  .mobile-toggle svg {
    width: 18px;
    height: 18px;
  }
}

/* --------------------------------------------------------------------------
   5. FOOTER (Deepest Blue #033151)
   -------------------------------------------------------------------------- */
.site-footer {
  background-color: #033151;
  color: #BBE3F5;
  padding-top: 80px;
  padding-bottom: 40px;
  border-top: 1px solid rgba(112, 178, 206, 0.2);
}

.footer-top {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1fr 1fr 1.2fr;
  gap: 32px;
  margin-bottom: 60px;
}

.footer-brand img {
  height: 56px;
  width: auto;
  object-fit: contain;
  margin-bottom: 4px;
}

.footer-brand p {
  color: #92B8D2;
  font-size: 0.9rem;
  margin-top: 16px;
  line-height: 1.6;
}

.footer-brand .footer-tagline {
  font-family: var(--font-serif);
  font-size: 1.25rem;
  color: var(--color-white);
  margin-top: 12px;
}

.footer-col-title {
  font-family: var(--font-sans);
  font-size: 0.85rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--color-white);
  margin-bottom: 20px;
}

.footer-links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.footer-links a {
  color: #98BDD5;
  font-size: 0.885rem;
  transition: color var(--transition-fast), transform var(--transition-fast);
  display: inline-block;
}

.footer-links a:hover {
  color: var(--color-white);
  transform: translateX(3px);
}

.footer-contact-item {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  margin-bottom: 12px;
  font-size: 0.885rem;
  color: #98BDD5;
}

.footer-contact-item svg {
  width: 18px;
  height: 18px;
  color: #70B2CE;
  flex-shrink: 0;
  margin-top: 2px;
}

.footer-socials {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-top: 20px;
}

.footer-social-link {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.08);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #FFFFFF;
  border: 1px solid rgba(112, 178, 206, 0.2);
  transition: all var(--transition-fast);
}

.footer-social-link:hover {
  background: var(--color-primary-blue);
  color: #FFFFFF;
  transform: translateY(-2px);
}

.footer-bottom {
  padding-top: 32px;
  border-top: 1px solid rgba(112, 178, 206, 0.15);
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
  font-size: 0.825rem;
  color: #789BB3;
}

.footer-legal-links {
  display: flex;
  gap: 20px;
  flex-wrap: wrap;
}

.footer-legal-links a {
  color: #789BB3;
}

.footer-legal-links a:hover {
  color: var(--color-white);
}

@media (max-width: 1024px) {
  .footer-top {
    grid-template-columns: repeat(3, 1fr);
  }
}

@media (max-width: 640px) {
  .footer-top {
    grid-template-columns: 1fr;
  }
  .footer-bottom {
    flex-direction: column;
    text-align: center;
  }
}

/* --------------------------------------------------------------------------
   6. ACCESSIBILITY & PREFERS-REDUCED-MOTION
   -------------------------------------------------------------------------- */
:focus-visible {
  outline: 2px solid var(--color-primary-blue);
  outline-offset: 3px;
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}