/* ============================================
   adserve.ai — Shared Components
   Header, Footer, Navigation, Mobile Nav
   ============================================ */

/* --- Header --- */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  padding: var(--space-4) 0;
  transition: all var(--duration-normal) var(--ease-out);
}

.site-header.scrolled {
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  padding: var(--space-3) 0;
  box-shadow: 0 1px 0 rgba(0,0,0,0.06);
}

/* When scrolled, switch nav text to dark */
.site-header.scrolled .nav-list > li > a,
.site-header.scrolled .nav-dropdown__trigger {
  color: var(--gray-600);
}
.site-header.scrolled .nav-list > li > a:hover,
.site-header.scrolled .nav-dropdown__trigger:hover {
  color: var(--gray-900);
  background: var(--gray-100);
}
.site-header.scrolled .menu-toggle span {
  background: var(--gray-900);
}

.header__inner {
  max-width: var(--container-wide);
  margin: 0 auto;
  padding: 0 var(--space-6);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-8);
}

/* --- Logo --- */
.logo {
  display: inline-flex;
  align-items: center;
  flex-shrink: 0;
}

/* CSS wordmark — primary logo, shown everywhere */
.logo-wordmark {
  display: inline-flex;
  align-items: center;
  font-size: 1.75rem;
  font-weight: 800;
  letter-spacing: -0.03em;
  line-height: 1;
}

/* Image logo — hidden (PNG available but CSS wordmark preferred) */
.logo-img { display: none; }

/* Dark hero / default state */
.logo__ad { color: var(--white); }
.logo__serve { color: #7BA4FF; }

/* Scrolled header (frosted white): dark text */
.site-header.scrolled .logo__ad { color: #1B2980; }
.site-header.scrolled .logo__serve { color: #4257CC; }

/* Footer: brand colours on light background */
.site-footer .logo__ad { color: #1B2980; }
.site-footer .logo__serve { color: #4257CC; }

/* --- Navigation --- */
.main-nav {
  display: flex;
  align-items: center;
}

.nav-list {
  display: flex;
  align-items: center;
  gap: var(--space-1);
}

.nav-list > li > a,
.nav-dropdown__trigger {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  padding: var(--space-2) var(--space-3);
  font-size: var(--text-sm);
  font-weight: 500;
  color: rgba(255,255,255,0.75);
  border-radius: var(--radius-md);
  transition: all var(--duration-fast) var(--ease-out);
}

.nav-list > li > a:hover,
.nav-dropdown__trigger:hover {
  color: var(--white);
  background: rgba(255,255,255,0.06);
}

.nav-dropdown__trigger svg {
  width: 10px;
  height: 10px;
  transition: transform var(--duration-fast) var(--ease-out);
}

.nav-dropdown:hover .nav-dropdown__trigger svg {
  transform: rotate(180deg);
}

/* Dropdown Menu */
.nav-dropdown {
  position: relative;
}

.nav-dropdown__menu {
  position: absolute;
  top: 100%;
  left: 50%;
  transform: translateX(-50%) translateY(8px);
  padding-top: var(--space-2);
  opacity: 0;
  visibility: hidden;
  transition: all var(--duration-normal) var(--ease-out);
  z-index: 100;
}

.nav-dropdown__inner {
  background: var(--white);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-2xl), 0 0 0 1px rgba(0,0,0,0.04);
  padding: var(--space-4);
  min-width: 260px;
}

.nav-dropdown__label {
  display: block;
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: var(--tracking-wider);
  text-transform: uppercase;
  color: var(--gray-400);
  padding: var(--space-1) var(--space-3);
  margin-bottom: var(--space-1);
}

.nav-dropdown__link {
  display: block;
  padding: var(--space-2) var(--space-3);
  font-size: var(--text-sm);
  color: var(--gray-700);
  border-radius: var(--radius-md);
  transition: all var(--duration-fast);
}

.nav-dropdown__link:hover {
  background: var(--gray-50);
  color: var(--navy-800);
}

.nav-dropdown__link strong {
  display: block;
  color: var(--gray-900);
  margin-bottom: 2px;
}

.nav-dropdown__link span {
  display: block;
  font-size: var(--text-xs);
  color: var(--gray-500);
}

.nav-dropdown__section {
  margin-bottom: var(--space-3);
}

.nav-dropdown__section:last-child {
  margin-bottom: 0;
}

.nav-dropdown__section + .nav-dropdown__section {
  padding-top: var(--space-3);
  border-top: 1px solid var(--gray-100);
}

/* Header Actions */
.header__actions {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  flex-shrink: 0;
}

/* --- Mobile Toggle --- */
.menu-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: var(--space-2);
  z-index: 1001;
}

.menu-toggle span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--white);
  border-radius: 2px;
  transition: all var(--duration-normal) var(--ease-out);
}

.menu-toggle.active span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}
.menu-toggle.active span:nth-child(2) {
  opacity: 0;
}
.menu-toggle.active span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* --- Mobile Nav --- */
.mobile-nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: var(--navy-900);
  z-index: 999;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  visibility: hidden;
  transition: all var(--duration-slow) var(--ease-out);
}

.mobile-nav.open {
  opacity: 1;
  visibility: visible;
}

.mobile-nav__inner {
  text-align: center;
  padding: var(--space-8);
}

.mobile-nav__link {
  display: block;
  font-size: var(--text-2xl);
  font-weight: 600;
  color: var(--white);
  padding: var(--space-4) 0;
  opacity: 0.8;
  transition: opacity var(--duration-fast);
}

.mobile-nav__link:hover {
  opacity: 1;
}

/* --- Footer --- */
.site-footer {
  background: var(--gray-50);
  padding: var(--space-16) 0 var(--space-8);
  border-top: 1px solid var(--gray-200);
}

.footer__grid {
  display: grid;
  grid-template-columns: 1.5fr repeat(4, 1fr);
  gap: var(--space-8);
  margin-bottom: var(--space-12);
}

.footer__brand {
  padding-right: var(--space-8);
}

.footer__tagline {
  margin-top: var(--space-4);
  font-size: var(--text-sm);
  color: var(--gray-500);
  line-height: var(--leading-relaxed);
}

.footer__heading {
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--gray-900);
  margin-bottom: var(--space-4);
}

.footer__links li {
  margin-bottom: var(--space-2);
}

.footer__links a {
  font-size: var(--text-sm);
  color: var(--gray-500);
  transition: color var(--duration-fast);
}

.footer__links a:hover {
  color: var(--orange-500);
}

.footer__bottom {
  padding-top: var(--space-6);
  font-size: var(--text-xs);
  color: var(--gray-400);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  flex-wrap: wrap;
}

.footer__social {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.footer__social-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: var(--radius-md);
  color: var(--gray-400);
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--gray-200);
  transition: color var(--duration-normal) var(--ease-out),
              border-color var(--duration-normal) var(--ease-out),
              background var(--duration-normal) var(--ease-out);
}

.footer__social-link:hover {
  color: var(--orange-500);
  border-color: var(--orange-300);
  background: var(--orange-100);
}

.footer__social-link svg {
  width: 18px;
  height: 18px;
}

/* --- Responsive --- */
@media (max-width: 1024px) {
  .main-nav, .header__actions { display: none; }
  .menu-toggle { display: flex; }

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

  .footer__brand {
    grid-column: 1 / -1;
    padding-right: 0;
  }
}

@media (max-width: 480px) {
  .footer__grid {
    grid-template-columns: 1fr;
  }
}

/* ============================================================
   SECTION MARKER DEVICE
   Reusable across all pages: icon badge centred on a hairline rule
   ============================================================ */

.section-marker {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  margin-bottom: var(--space-10);
  padding-top: var(--space-2);
}

.section-marker__rule {
  flex: 1;
  height: 1px;
  background: linear-gradient(to right, transparent, var(--gray-200));
}

.section-marker__rule:last-child {
  background: linear-gradient(to left, transparent, var(--gray-200));
}

.section-marker__badge {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 52px;
  height: 52px;
  border-radius: 50%;
  background: linear-gradient(135deg, #EEF2FF 0%, #E0E7FF 100%);
  border: 1px solid #C7D2FE;
  color: #4257CC;
  flex-shrink: 0;
  box-shadow: 0 2px 12px rgba(66, 87, 204, 0.12);
}

/* Light variant — for dark-background sections */
.section-marker--light .section-marker__rule {
  background: linear-gradient(to right, transparent, rgba(255,255,255,0.15));
}
.section-marker--light .section-marker__rule:last-child {
  background: linear-gradient(to left, transparent, rgba(255,255,255,0.15));
}
.section-marker--light .section-marker__badge {
  background: linear-gradient(135deg, rgba(255,255,255,0.12) 0%, rgba(255,255,255,0.06) 100%);
  border-color: rgba(255,255,255,0.2);
  color: rgba(255,255,255,0.85);
  box-shadow: 0 2px 12px rgba(0,0,0,0.2);
}

@media (max-width: 640px) {
  .section-marker__badge {
    width: 42px;
    height: 42px;
  }
}

/* ============================================
   Site Restructure — New Components
   ============================================ */

/* Screenshot placeholders */
.screenshot-placeholder {
  background: rgba(66, 87, 204, 0.04);
  border: 1px dashed rgba(66, 87, 204, 0.25);
  border-radius: var(--radius-lg);
  padding: 3rem 2rem;
  text-align: center;
  margin: 2rem 0;
  color: var(--text-tertiary);
}
.screenshot-placeholder.screenshot-sm {
  padding: 1.75rem 1.25rem;
  margin: 1rem 0 0;
}
.placeholder-inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.75rem;
  color: var(--gray-500);
}
.placeholder-inner svg {
  color: var(--orange-500);
  opacity: 0.5;
}
.placeholder-inner p {
  font-size: var(--text-sm);
  margin: 0;
  max-width: 28rem;
  line-height: 1.5;
}

/* Capability block (alternating image/content rows on platform.html) */
.capability-block {
  display: grid;
  grid-template-columns: 1.1fr 1fr;
  gap: var(--space-12);
  align-items: center;
  padding: var(--space-12) 0;
  border-bottom: 1px solid var(--gray-200);
}
.capability-block:last-child {
  border-bottom: 0;
}
.capability-block--reverse .capability-block__content {
  order: 2;
}
.capability-block__content h3 {
  font-size: var(--text-3xl);
  margin: 0.5rem 0 1rem;
  color: var(--text-primary);
  letter-spacing: var(--tracking-tight);
}
.capability-block__content p {
  color: var(--text-secondary);
  font-size: var(--text-lg);
  line-height: var(--leading-relaxed);
}
.capability-block__visual .screenshot-placeholder {
  margin: 0;
  min-height: 280px;
  display: flex;
  align-items: center;
  justify-content: center;
}
.capability-screenshot {
  display: block;
  width: 100%;
  height: auto;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-xl);
  border: 1px solid var(--gray-200);
}
@media (max-width: 900px) {
  .capability-block {
    grid-template-columns: 1fr;
    gap: var(--space-6);
    padding: var(--space-8) 0;
  }
  .capability-block--reverse .capability-block__content {
    order: 0;
  }
}

/* Badge label — small uppercase tag used for "The Engine", "API" etc. */
.badge-label {
  display: inline-block;
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: var(--tracking-wider);
  text-transform: uppercase;
  color: var(--orange-500);
  background: var(--orange-100);
  padding: 0.35rem 0.7rem;
  border-radius: var(--radius-full);
  margin-bottom: 0.75rem;
}

/* Feature list (bulleted on capability blocks) */
.feature-list {
  list-style: none;
  padding: 0;
  margin: 1.25rem 0;
}
.feature-list li {
  position: relative;
  padding: 0.5rem 0 0.5rem 1.75rem;
  color: var(--text-secondary);
  font-size: var(--text-base);
  border-bottom: 1px solid var(--gray-100);
}
.feature-list li:last-child {
  border-bottom: 0;
}
.feature-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 1rem;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--orange-100);
  border: 2px solid var(--orange-500);
}

/* Journey step (numbered 01-04 stages) */
.journey-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-8);
  margin-top: var(--space-8);
}
.journey-step {
  display: grid;
  grid-template-columns: 96px 1fr;
  gap: var(--space-6);
  align-items: start;
  padding: var(--space-6);
  background: var(--surface-primary);
  border: 1px solid var(--gray-200);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-sm);
}
.journey-step__num {
  font-size: var(--text-5xl);
  font-weight: 800;
  color: var(--orange-500);
  line-height: 1;
  letter-spacing: var(--tracking-tight);
  font-feature-settings: "tnum";
}
.journey-step__body h3 {
  font-size: var(--text-2xl);
  margin: 0.25rem 0 0.75rem;
  letter-spacing: var(--tracking-tight);
  color: var(--text-primary);
}
.journey-step__body p {
  color: var(--text-secondary);
  line-height: var(--leading-relaxed);
}
@media (max-width: 700px) {
  .journey-step {
    grid-template-columns: 1fr;
    gap: var(--space-3);
  }
  .journey-step__num {
    font-size: var(--text-4xl);
  }
}

/* Capability blocks wrapper — multiple alternating rows on a single page
   (e.g. trafficking.html). Enforces consistent image sizing so a row with
   a squarer screenshot doesn't dominate vertically, and symmetric columns
   so non-reverse and reverse rows render the same image width. */
.capability-blocks {
  display: flex;
  flex-direction: column;
}
.capability-blocks .capability-block {
  grid-template-columns: 1fr 1.7fr;
  gap: var(--space-10);
  padding: var(--space-10) 0;
}
.capability-blocks .capability-block--reverse {
  grid-template-columns: 1.7fr 1fr;
}
.capability-blocks .capability-block:first-child {
  padding-top: var(--space-6);
}
.capability-blocks .capability-block .capability-block__content h3 {
  margin-top: var(--space-3);
}
.capability-blocks .capability-screenshot {
  width: 100%;
  /* Natural aspect — high-res sources render full-size and sharp,
     not letterboxed inside a forced ratio. */
}
@media (max-width: 900px) {
  .capability-blocks .capability-block {
    grid-template-columns: 1fr;
    gap: var(--space-4);
  }
}

/* Closer look groups (deeper-dive sections under journey, e.g. sales-planning.html) */
.closer-look-group {
  margin-top: var(--space-10);
}
.closer-look-group:first-of-type {
  margin-top: var(--space-8);
}
.closer-look-group__title {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  margin: 0 0 var(--space-4);
  padding-bottom: var(--space-3);
  border-bottom: 1px solid var(--gray-200);
}
.closer-look-group__title .badge-label {
  font-size: var(--text-sm);
}
.closer-look-pair {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-3);
}

/* Closer Look cards — every box and every image occupies identical space.
   Equal card heights via grid-auto-rows:1fr; a fixed-height image frame
   (object-fit:cover) pinned to the card bottom so image baselines align
   across the whole grid regardless of how much text sits above. */
.closer-look-group .features-grid {
  grid-auto-rows: 1fr;
}
.closer-look-group .card {
  display: flex;
  flex-direction: column;
}
.closer-look-group .card .capability-screenshot {
  width: 100%;
  height: 230px;
  object-fit: cover;
  object-position: top;
  border-radius: var(--radius-md);
}
.closer-look-group .card > .capability-screenshot,
.closer-look-group .card > .closer-look-pair {
  margin-top: auto;   /* pin the image block to the bottom of every card */
}
.closer-look-group .closer-look-pair {
  height: 230px;
}
.closer-look-group .closer-look-pair .capability-screenshot {
  height: 100%;
}

/* Inline mid-page CTA — a lighter banner for breaking up long pages,
   distinct from the full-width dark .cta-section at the page foot. */
.inline-cta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-8);
  flex-wrap: wrap;
  padding: var(--space-8) var(--space-10);
  border-radius: var(--radius-xl);
  background: linear-gradient(135deg, var(--orange-100) 0%, var(--surface-primary) 100%);
  border: 1px solid var(--orange-300);
}
.inline-cta__copy h3 {
  font-size: var(--text-2xl);
  margin: 0 0 var(--space-2);
  color: var(--navy-800);
}
.inline-cta__copy p {
  margin: 0;
  color: var(--gray-600);
  font-size: var(--text-base);
}
.inline-cta .btn {
  flex-shrink: 0;
}
@media (max-width: 640px) {
  .inline-cta {
    padding: var(--space-6);
  }
}

/* API group cards (4 grouped boxes on pulse.html) */
.api-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-6);
  margin-top: var(--space-8);
}
.api-group {
  background: var(--surface-primary);
  border: 1px solid var(--gray-200);
  border-radius: var(--radius-xl);
  padding: var(--space-6);
  box-shadow: var(--shadow-sm);
}
.api-group h4 {
  font-size: var(--text-xl);
  margin: 0.25rem 0 0.5rem;
}
.api-group p {
  color: var(--text-secondary);
  font-size: var(--text-base);
  line-height: var(--leading-relaxed);
}
@media (max-width: 800px) {
  .api-grid {
    grid-template-columns: 1fr;
  }
}

/* Capability grid — homepage 4 capability cards (anchor cards) */
.capability-grid .card {
  display: block;
  text-decoration: none;
  color: inherit;
  transition: transform var(--duration-normal) var(--ease-out),
              box-shadow var(--duration-normal) var(--ease-out),
              border-color var(--duration-normal) var(--ease-out);
}
.capability-grid .card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-lg);
  border-color: var(--orange-300);
}
.capability-grid .card--featured {
  grid-column: 1 / -1;
  border: 1px solid var(--orange-300);
  background: linear-gradient(135deg, var(--orange-100) 0%, var(--surface-primary) 100%);
}
.card-link {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-weight: 600;
  color: var(--orange-500);
  margin-top: 1rem;
  font-size: var(--text-sm);
}
.capability-grid .card:hover .card-link svg {
  transform: translateX(3px);
  transition: transform var(--duration-normal) var(--ease-out);
}

/* Connection card (the "connected to platform" cross-link cards) */
.connection-card {
  display: block;
  text-decoration: none;
  color: inherit;
  transition: transform var(--duration-normal) var(--ease-out),
              box-shadow var(--duration-normal) var(--ease-out),
              border-color var(--duration-normal) var(--ease-out);
}
.connection-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-lg);
  border-color: var(--orange-300);
}

/* Hero breadcrumb back-link */
.breadcrumb {
  margin-bottom: var(--space-4);
}
.breadcrumb__link {
  color: rgba(255,255,255,0.7);
  font-size: var(--text-sm);
  text-decoration: none;
  font-weight: 500;
  letter-spacing: var(--tracking-wide);
}
.breadcrumb__link:hover {
  color: var(--white);
}