/* ============================================================
   MTSAi — shared page shell (load after bundle.css)
   Nav chrome, scroll progress, skip link. Does NOT define
   .mts-nav.scrolled — that stays in premium.css for glass state.
   ============================================================ */

@import url("premium-enhancements.css");

html {
  scroll-behavior: smooth;
}

body {
  overflow-x: hidden;
  background: var(--layer-bg);
}

.mts-container {
  max-width: var(--container-xl);
  margin: 0 auto;
  padding: 0 var(--space-6);
}

#scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 3px;
  background: linear-gradient(90deg, var(--blue-60), var(--green-50));
  transform: scaleX(0);
  transform-origin: left;
  z-index: var(--z-scroll-progress, 9999);
  transition: transform 80ms linear;
}

.skip-link {
  position: absolute;
  top: -40px;
  left: 0;
  background: var(--interactive);
  color: var(--text-on-color, #fff);
  padding: 8px 16px;
  text-decoration: none;
  z-index: var(--z-skip-link, 10000);
  font-size: 13px;
  font-weight: 600;
}

.skip-link:focus {
  top: 0;
}

.logo-mark {
  display: inline-flex;
  flex-shrink: 0;
}

.mts-nav {
  background: var(--layer-bg);
  border-bottom: 1px solid var(--border-subtle);
  position: sticky;
  top: 0;
  z-index: var(--z-sticky-nav, 100);
  transition: box-shadow 200ms var(--ease-standard);
}

.mts-nav__inner {
  display: flex;
  align-items: center;
  padding: 0 var(--space-6);
  height: 64px;
  max-width: var(--container-xl);
  margin: 0 auto;
}

/* Legal / policy — meta strip under hero (aligns with .mts-container) */
.policy-meta-strip {
  background: var(--layer-01);
  border-bottom: 1px solid var(--border-subtle);
  padding: var(--space-4) 0;
}

.policy-meta-strip__inner {
  display: flex;
  align-items: center;
  gap: var(--space-6);
  flex-wrap: wrap;
  max-width: var(--container-xl);
  margin: 0 auto;
  padding: 0 var(--space-6);
}

/* Sticky in-page sub-nav (e.g. technology platform) */
.page-nav__inner {
  display: flex;
  align-items: center;
  gap: var(--space-7);
  padding: 0 var(--space-6);
  height: 48px;
  max-width: var(--container-xl);
  margin: 0 auto;
  white-space: nowrap;
}

/* Shared inner wrapper for full-bleed strips (announce, notices) */
.mts-announce-inner {
  max-width: var(--container-xl);
  margin: 0 auto;
  padding: 0 var(--space-6);
  text-align: center;
  line-height: 1.55;
}

.mts-nav__logo {
  display: flex;
  align-items: center;
  text-decoration: none;
  margin-right: var(--space-9);
  flex-shrink: 0;
}

.mts-nav__logo img {
  height: 38px;
  width: auto;
  display: block;
}

.mts-nav__links {
  list-style: none;
  gap: var(--space-7);
  align-items: center;
  flex: 1;
}

.mts-nav__link {
  font-size: 14px;
  font-weight: 500;
  color: var(--text-secondary);
  text-decoration: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0;
  transition: color var(--duration-fast-02) var(--ease-standard);
  font-family: var(--font-body);
  position: relative;
}

.mts-nav__link.active {
  color: var(--interactive);
}

.mts-nav__link.active::after {
  content: "";
  position: absolute;
  bottom: -22px;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--interactive);
}

.mts-nav__link:hover {
  color: var(--text-primary);
}

.nav-has-dropdown {
  position: relative;
}

.nav-dropdown {
  position: absolute;
  top: calc(100% + 16px);
  left: 0;
  background: #fff;
  border: 1px solid var(--border-subtle);
  box-shadow:
    0 8px 24px rgba(0, 0, 0, 0.1),
    0 2px 6px rgba(0, 0, 0, 0.06);
  min-width: 300px;
  list-style: none;
  padding: var(--space-2) 0 var(--space-3);
  opacity: 0;
  visibility: hidden;
  transform: translateY(-6px);
  transition:
    opacity 150ms var(--ease-standard),
    visibility 150ms,
    transform 150ms var(--ease-standard);
  z-index: var(--z-dropdown, 1000);
  border-radius: 2px;
}

.nav-dropdown.open {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.nav-dropdown__group-label {
  display: block;
  padding: var(--space-4) var(--space-5) var(--space-2);
  font-family: var(--font-ui);
  font-size: 10px;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-placeholder);
}

.nav-dropdown__group-label:not(:first-child) {
  border-top: 1px solid var(--border-subtle);
  margin-top: var(--space-2);
}

.nav-dropdown li a {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 9px var(--space-5);
  font-size: 13px;
  color: var(--text-secondary);
  text-decoration: none;
  transition:
    background var(--duration-fast-02),
    color var(--duration-fast-02);
}

.nav-dropdown li a::before {
  content: "→";
  font-size: 11px;
  color: var(--interactive);
  opacity: 0;
  transition: opacity 100ms;
}

.nav-dropdown li a:hover {
  background: var(--layer-01);
  color: var(--interactive);
}

.nav-dropdown li a:hover::before {
  opacity: 1;
}

.mts-nav__actions {
  display: flex;
  align-items: center;
  gap: var(--space-5);
  margin-left: auto;
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  #scroll-progress {
    transition: none;
  }
}

/* ============================================================
   Hero media slot (shared)
   - Works with existing .mts-hero variants in bundle.css
   - Adds an optional right-side visual for standard heroes
   - Adds an optional visual block for article heroes
   ============================================================ */

.mts-hero__layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-9);
  align-items: center;
}

@media (min-width: 901px) {
  .mts-hero__layout {
    grid-template-columns: minmax(320px, 1fr) minmax(320px, 520px);
    gap: var(--space-12);
  }
}

.mts-hero__copy {
  min-width: 0;
}

.mts-hero__media {
  min-width: 0;
}

.mts-hero__media-frame {
  border: 1px solid rgba(255, 255, 255, 0.14);
  background: rgba(255, 255, 255, 0.06);
  box-shadow: 0 10px 40px rgba(0, 0, 0, 0.30);
  overflow: hidden;
}

.mts-hero__media-frame img,
.mts-hero__media-frame svg {
  display: block;
  width: 100%;
  height: auto;
}

.mts-hero__media-caption {
  padding: 12px 14px;
  border-top: 1px solid rgba(255, 255, 255, 0.12);
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: rgba(255, 255, 255, 0.72);
}

/* Article heroes: allow an optional visual block inside the meta column */
.mts-hero__article-media {
  margin-bottom: var(--space-6);
}

@media (prefers-reduced-motion: reduce) {
  .mts-hero__media-frame {
    box-shadow: none;
  }
}