/* AIVeNautics — Header / Footer / Hero / Section / Grid layout primitives.
 * Specific page styles live inside each page folder's style.css.
 */

/* ═══════════════════════════════════════════════════════════════════
   HEADER
   ═══════════════════════════════════════════════════════════════════ */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: var(--z-header);
  height: var(--h-header);
  background-color: rgba(10, 26, 74, 0.9);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  height: 100%;
}

.site-header__logo {
  display: inline-flex;
  align-items: center;
}
.site-header__logo img {
  height: 28px;
  width: auto;
}

/* Desktop nav */
.primary-nav {
  display: none;
  align-items: center;
  gap: 40px;
  margin-left: auto;
}
@media (min-width: 1024px) {
  .primary-nav { display: flex; }
}

.primary-nav__item {
  position: relative;
}

.primary-nav__trigger,
.primary-nav__link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: var(--fs-body-sm);
  font-weight: var(--fw-medium);
  color: var(--c-white-85);
  transition: color var(--tx-base);
  padding: 8px 0;
  background: none;
  border: 0;
  cursor: pointer;
}
.primary-nav__trigger:hover,
.primary-nav__link:hover { color: var(--c-white); }

.primary-nav__caret {
  font-size: 10px;
  opacity: 0.7;
}

.primary-nav__link.is-active,
.primary-nav__menu-link.is-active {
  color: var(--c-sky-500);
}

.primary-nav__menu {
  position: absolute;
  left: 50%;
  top: calc(100% + 6px);
  z-index: 10;
  width: 240px;
  transform: translateX(-50%);
  background-color: var(--c-navy-800);
  border-radius: var(--radius-card);
  padding: 8px;
  border: 1px solid rgba(255, 255, 255, 0.1);
  box-shadow: var(--shadow-pop);
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--tx-fast), visibility var(--tx-fast);
}
.primary-nav__item:hover .primary-nav__menu,
.primary-nav__item:focus-within .primary-nav__menu {
  opacity: 1;
  visibility: visible;
}

.primary-nav__menu-link {
  display: block;
  border-radius: var(--radius-sm);
  padding: 10px 20px;
  font-size: var(--fs-body-sm);
  color: var(--c-white-85);
  text-align: center;
  transition: background-color var(--tx-base), color var(--tx-base);
}
.primary-nav__menu-link:hover {
  background-color: rgba(255, 255, 255, 0.05);
  color: var(--c-white);
}

/* Header CTA (desktop) */
.site-header__cta {
  display: none;
}
@media (min-width: 768px) {
  .site-header__cta { display: inline-flex; }
}

/* Mobile toggle */
.mobile-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: 999px;
  color: var(--c-white-85);
  background-color: transparent;
  transition: background-color var(--tx-base);
}
.mobile-toggle:hover { background-color: rgba(255, 255, 255, 0.05); }
.mobile-toggle svg { width: 20px; height: 20px; }
@media (min-width: 1024px) {
  .mobile-toggle { display: none; }
}

/* Mobile menu drawer */
.mobile-menu {
  display: none;
  border-top: 1px solid rgba(255, 255, 255, 0.05);
  background-color: rgba(10, 26, 74, 0.95);
  padding: 16px var(--side-pad-sm);
}
@media (min-width: 768px) {
  .mobile-menu { padding-left: var(--side-pad-md); padding-right: var(--side-pad-md); }
}
.mobile-menu.is-open { display: block; }
@media (min-width: 1024px) {
  .mobile-menu { display: none !important; }
}

.mobile-menu__nav {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.mobile-menu__group { width: 100%; }
.mobile-menu__group summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-radius: var(--radius-sm);
  padding: 10px 0;
  font-size: var(--fs-body-sm);
  font-weight: var(--fw-medium);
  color: var(--c-white-85);
  cursor: pointer;
  list-style: none;
}
.mobile-menu__group summary::-webkit-details-marker { display: none; }
.mobile-menu__group summary .caret {
  font-size: 12px;
  opacity: 0.7;
  transition: transform var(--tx-base);
}
.mobile-menu__group[open] summary .caret { transform: rotate(180deg); }

.mobile-menu__children {
  padding: 0 0 8px 12px;
  display: flex;
  flex-direction: column;
  gap: 2px;
}
.mobile-menu__children a,
.mobile-menu__link {
  display: block;
  border-radius: var(--radius-sm);
  padding: 8px 10px;
  font-size: var(--fs-body-sm);
  color: var(--c-white-75);
  transition: background-color var(--tx-base), color var(--tx-base);
}
.mobile-menu__children a:hover,
.mobile-menu__link:hover {
  background-color: rgba(255, 255, 255, 0.05);
  color: var(--c-white);
}
.mobile-menu__link {
  font-weight: var(--fw-medium);
  color: var(--c-white-85);
  padding: 10px 0;
}

/* ═══════════════════════════════════════════════════════════════════
   MAIN OFFSET (push content below fixed header)
   ═══════════════════════════════════════════════════════════════════ */
.main {
  padding-top: var(--h-header);
}

/* ═══════════════════════════════════════════════════════════════════
   FOOTER
   ═══════════════════════════════════════════════════════════════════ */
.site-footer {
  background-color: var(--c-navy-950);
  border-top: 1px solid rgba(255, 255, 255, 0.05);
}

.site-footer__grid {
  display: grid;
  gap: 40px;
  padding-top: 64px;
  padding-bottom: 64px;
}
@media (min-width: 768px) {
  .site-footer__grid {
    grid-template-columns: repeat(12, minmax(0, 1fr));
  }
}

.site-footer__col {
  display: flex;
  flex-direction: column;
  gap: 12px;
}
@media (min-width: 768px) {
  .site-footer__col {
    grid-column: span 4 / span 4;
  }
}

.site-footer__logo img {
  height: 28px;
  width: auto;
}

.site-footer__lede {
  margin-top: 16px;
  font-size: var(--fs-body-sm);
  color: var(--c-slatey-400);
  line-height: 1.6;
}

.site-footer__address {
  margin-top: 12px;
  font-style: normal;
  font-size: var(--fs-body-sm);
  color: var(--c-slatey-400);
  line-height: 1.65;
}

.site-footer__list {
  margin-top: 12px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  font-size: var(--fs-body-sm);
}

.site-footer__list a {
  color: var(--c-white-90);
  transition: color var(--tx-base);
}
.site-footer__list a:hover { color: var(--c-sky-500); }
.site-footer__list .muted { color: var(--c-slatey-400); }

.site-footer__base {
  border-top: 1px solid rgba(255, 255, 255, 0.05);
}

.site-footer__base-inner {
  display: flex;
  flex-direction: column-reverse;
  gap: 12px;
  padding-top: 20px;
  padding-bottom: 20px;
}
@media (min-width: 768px) {
  .site-footer__base-inner {
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
  }
}

.site-footer__copy {
  font-size: var(--fs-meta);
  color: var(--c-slatey-500);
}

.site-footer__privacy {
  font-size: var(--fs-meta);
  color: var(--c-slatey-400);
  transition: color var(--tx-base);
}
.site-footer__privacy:hover { color: var(--c-white); }

/* ═══════════════════════════════════════════════════════════════════
   HERO
   ═══════════════════════════════════════════════════════════════════ */
.hero {
  position: relative;
  background-color: var(--c-navy-950);
}

.hero__inner {
  display: flex;
  flex-direction: column;
  gap: 20px;
  align-items: center;
  text-align: center;
}

.hero__title {
  font-size: var(--fs-display-lg);
  line-height: 1.1;
  letter-spacing: -0.02em;
  color: var(--c-white);
  max-width: var(--max-narrow);
}

.hero__title--xl {
  font-size: var(--fs-display-xl);
  line-height: 1.05;
  max-width: var(--max-content);
}

.hero__lede {
  max-width: 720px;
  font-size: var(--fs-body-lg);
  color: var(--c-slatey-400);
  line-height: 1.6;
}

.hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  justify-content: center;
  margin-top: 16px;
}

.hero--left {
  text-align: left;
}
.hero--left .hero__inner {
  align-items: flex-start;
  text-align: left;
}
.hero--left .hero__actions { justify-content: flex-start; }

/* ═══════════════════════════════════════════════════════════════════
   SECTION
   ═══════════════════════════════════════════════════════════════════ */
.section {
  position: relative;
}

.section__header {
  display: flex;
  flex-direction: column;
  gap: 16px;
  max-width: var(--max-narrow);
  margin-bottom: 48px;
}

.section__title {
  font-size: var(--fs-display-md);
  line-height: 1.15;
  letter-spacing: -0.015em;
  color: var(--c-white);
}

.section__lede {
  font-size: var(--fs-body-lg);
  color: var(--c-slatey-400);
  line-height: 1.6;
}

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

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

.grid-2 { grid-template-columns: 1fr; }
.grid-3 { grid-template-columns: 1fr; }
.grid-4 { grid-template-columns: 1fr; }

@media (min-width: 640px) {
  .grid-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (min-width: 768px) {
  .grid-3 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .grid-4 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (min-width: 1024px) {
  .grid-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .grid-4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }
}

.grid-split {
  display: grid;
  gap: 40px;
  grid-template-columns: 1fr;
  align-items: center;
}
@media (min-width: 768px) {
  .grid-split { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 56px; }
}

/* ═══════════════════════════════════════════════════════════════════
   FLEX UTILITIES (kept minimal — most layout uses grid)
   ═══════════════════════════════════════════════════════════════════ */
.row { display: flex; flex-wrap: wrap; gap: 16px; }
.row--center { justify-content: center; align-items: center; }
.row--between { justify-content: space-between; align-items: center; }
.col { display: flex; flex-direction: column; gap: 16px; }

.gap-sm { gap: 12px; }
.gap { gap: 16px; }
.gap-lg { gap: 24px; }
.gap-xl { gap: 40px; }

/* ═══════════════════════════════════════════════════════════════════
   IMAGE FRAMES
   ═══════════════════════════════════════════════════════════════════ */
.image-frame {
  position: relative;
  overflow: hidden;
  border-radius: var(--radius-card-lg);
  box-shadow: var(--shadow-pop);
  background-color: var(--c-navy-800);
}
.image-frame img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  aspect-ratio: 4 / 3;
  display: block;
}

.image-frame--tall img { aspect-ratio: 3 / 4; }
.image-frame--square img { aspect-ratio: 1 / 1; }
.image-frame--wide img { aspect-ratio: 16 / 9; }