/* ============================================================
   responsive.css
   Mobile / tablet breakpoints applied to common components
   Site-wide responsive helpers
   ============================================================
   Breakpoints:
     mobile:  ~768px
     tablet:  768px - 1024px
     desktop: 1024px+
   ============================================================ */

/* ---------- Site Header ---------- */

.site-nav {
  gap: 28px;
}

.nav-group {
  position: relative;
  display: inline-flex;
  align-items: center;
}

.nav-trigger {
  appearance: none;
  border: 0;
  background: transparent;
  color: inherit;
  font: inherit;
  line-height: inherit;
  padding: 0;
  cursor: pointer;
}

.nav-trigger::after {
  content: "";
  display: inline-block;
  width: 5px;
  height: 5px;
  margin-left: 8px;
  border-right: 1px solid currentColor;
  border-bottom: 1px solid currentColor;
  transform: translateY(-2px) rotate(45deg);
  opacity: .7;
}

.nav-dropdown {
  position: absolute;
  top: calc(100% + 16px);
  left: 50%;
  min-width: 172px;
  padding: 10px;
  display: grid;
  gap: 2px;
  background: color-mix(in oklab, var(--sw-bg) 94%, transparent);
  border: 1px solid var(--sw-line);
  box-shadow: 0 18px 48px color-mix(in oklab, var(--sw-ink) 10%, transparent);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  opacity: 0;
  visibility: hidden;
  transform: translate(-50%, 4px);
  transition: opacity .18s ease, transform .18s ease, visibility .18s ease;
}

.nav-dropdown::before {
  content: "";
  position: absolute;
  inset: -18px 0 auto;
  height: 18px;
}

.nav-dropdown a {
  display: block;
  padding: 10px 12px;
  white-space: nowrap;
  color: var(--sw-ink-2);
  text-decoration: none;
}

.nav-dropdown a:hover,
.nav-dropdown a:focus-visible {
  color: var(--sw-ink);
  background: color-mix(in oklab, var(--sw-bg-2) 72%, transparent);
  outline: none;
}

.nav-group:hover .nav-dropdown,
.nav-group:focus-within .nav-dropdown,
.nav-group[data-open="true"] .nav-dropdown {
  opacity: 1;
  visibility: visible;
  transform: translate(-50%, 0);
}

.nav-group[data-open="true"] > .nav-dropdown {
  opacity: 1;
  visibility: visible;
  transform: translate(-50%, 0);
}

.mobile-section {
  padding: 12px 0;
  border-bottom: 1px solid var(--sw-line);
}

.mobile-section-label {
  display: block;
  font-family: var(--sw-mono);
  font-size: 11px;
  letter-spacing: .16em;
  color: var(--sw-ink-3);
  text-transform: uppercase;
  margin-bottom: 4px;
}

.mobile-menu .mobile-section a {
  display: block !important;
  font-size: 24px !important;
  padding: 10px 0 !important;
  border-bottom: 0 !important;
}

@media (max-width: 768px) {
  .site-header,
  .da-header {
    padding: 16px 20px;
    flex-wrap: wrap;
  }

  .site-header .nav,
  .da-header nav {
    display: none;
  }

  .nav-toggle {
    display: flex;
  }

  body.menu-open {
    overflow: hidden;
  }

  body.menu-open .site-header,
  body.menu-open .da-header {
    z-index: 70;
  }
}

@media (min-width: 769px) {
  .nav-toggle {
    display: none;
  }
}

/* ---------- Mobile Menu Overlay ---------- */

.mobile-menu {
  position: fixed;
  inset: 0;
  background: var(--sw-bg);
  z-index: 50;
  display: none;
  flex-direction: column;
  padding: 80px 24px 24px;
}

.mobile-menu[data-open="true"] {
  display: flex;
}

.mobile-menu a {
  font-family: var(--sw-serif);
  font-size: 28px;
  padding: 16px 0;
  border-bottom: 1px solid var(--sw-line);
}

.mobile-menu a:last-child {
  border-bottom: none;
}

.nav-toggle {
  display: none;
  width: 36px;
  height: 36px;
  position: relative;
  z-index: 75;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 6px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0;
}

.nav-toggle span {
  display: block;
  width: 24px;
  height: 1px;
  background: var(--sw-ink);
  transition: transform 0.2s, opacity 0.2s;
}

.nav-toggle[aria-expanded="true"] span:nth-child(1) {
  transform: translateY(3.5px) rotate(45deg);
}

.nav-toggle[aria-expanded="true"] span:nth-child(2) {
  opacity: 0;
}

.nav-toggle[aria-expanded="true"] span:nth-child(3) {
  transform: translateY(-3.5px) rotate(-45deg);
}

@media (max-width: 768px) {
  .nav-toggle {
    display: flex !important;
  }
}

/* ---------- Site Footer ---------- */

@media (max-width: 768px) {
  .site-footer {
    padding: 48px 20px 24px;
  }

  .footer-top {
    flex-direction: column;
    gap: 32px;
  }

  .footer-brand,
  .footer-col {
    width: 100%;
  }

  .footer-bottom {
    flex-direction: column;
    align-items: flex-start;
    gap: 12px;
  }
}

/* ---------- Common section padding (mobile) ---------- */

@media (max-width: 768px) {
  section,
  .section {
    padding-left: 20px !important;
    padding-right: 20px !important;
  }
}

/* ---------- Typography (mobile scale) ---------- */

@media (max-width: 768px) {
  h1,
  .h1,
  .hero-headline {
    font-size: clamp(40px, 12vw, 64px) !important;
    line-height: 1.05 !important;
  }

  h2,
  .h2 {
    font-size: clamp(28px, 7vw, 36px) !important;
  }

  h3,
  .h3 {
    font-size: 20px !important;
  }
}

/* ---------- Reduced motion ---------- */

@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;
  }
}