/* ═══════════════════════════════════════════════════════════
   Units360 — shared top navigation
   Linked from index.html, solutions.html, pricing.html.
   Edit here, not in the pages: the nav markup is duplicated
   (no build step), but the styling must stay in one place.
   Expects the page to define: --accent --teal --text --muted
   --glass-bd --bg --radius-pill
   ═══════════════════════════════════════════════════════════ */

nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 200;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1.05rem 5vw;
  background: rgba(3,4,14,0.86);
  backdrop-filter: blur(24px);
  -webkit-backdrop-filter: blur(24px);
  border-bottom: 1px solid var(--glass-bd);
  transition: background .3s, box-shadow .3s, border-color .3s;
}
nav.scrolled {
  background: rgba(3,4,14,0.97);
  border-bottom-color: rgba(100,130,220,.28);
  box-shadow: 0 10px 34px rgba(0,0,0,.5);
}

.nav-logo-wrap { display: flex; align-items: center; gap: .6rem; text-decoration: none; }
.nav-logo-text {
  font-family: 'Space Grotesk', sans-serif;
  font-size: 1.32rem;
  font-weight: 700;
  letter-spacing: -.02em;
  background: linear-gradient(135deg, var(--accent), var(--teal));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  white-space: nowrap;
}

.nav-links { display: flex; gap: 2.1rem; align-items: center; }

/* Top-level links and the dropdown trigger must look identical. */
.nav-links > a,
.nav-dd-toggle {
  position: relative;
  display: inline-flex;
  align-items: center;
  gap: .35rem;
  background: none;
  border: none;
  padding: 0;
  color: #c9d0e8;
  font-family: 'Inter', sans-serif;
  font-size: 1.02rem;
  font-weight: 500;
  text-decoration: none;
  cursor: pointer;
  transition: color .2s;
}
.nav-links > a::after,
.nav-dd-toggle::after {
  content: '';
  position: absolute;
  left: 0; right: 0; bottom: -8px;
  height: 2px;
  border-radius: 2px;
  background: linear-gradient(90deg, var(--accent), var(--teal));
  transform: scaleX(0);
  transform-origin: left;
  transition: transform .25s ease;
}
.nav-links > a:hover,
.nav-dd-toggle:hover,
.nav-item.open .nav-dd-toggle { color: #fff; }
.nav-links > a:hover::after,
.nav-dd-toggle:hover::after,
.nav-item.open .nav-dd-toggle::after { transform: scaleX(1); }

/* ── Active page indicator ── */
.nav-links > a.is-active {
  color: var(--teal);
}
.nav-links > a.is-active::after { transform: scaleX(1); }
.nav-dd-toggle.is-active {
  color: var(--teal);
}
.nav-dd-toggle.is-active::after { transform: scaleX(1); }
/* Restore chevron stroke color inside gradient text */

.nav-dd-chevron { transition: transform .25s ease; }
.nav-item.open .nav-dd-chevron { transform: rotate(180deg); }

/* ── Dropdown ── */
.nav-item { position: relative; display: inline-flex; align-items: center; }

.nav-dropdown {
  position: absolute;
  top: 100%;
  left: 50%;
  /* Padding-top bridges the gap so the panel doesn't close mid-travel. */
  padding-top: 18px;
  transform: translateX(-50%) translateY(6px);
  opacity: 0;
  pointer-events: none;
  transition: opacity .22s ease, transform .22s ease;
}
.nav-item.open .nav-dropdown,
.nav-item:hover .nav-dropdown {
  opacity: 1;
  pointer-events: auto;
  transform: translateX(-50%) translateY(0);
}

.nav-dd-panel {
  display: flex;
  flex-direction: column;
  gap: .25rem;
  min-width: 300px;
  padding: 1.6rem 1.75rem;
  background: rgba(8,11,30,.97);
  backdrop-filter: blur(28px);
  -webkit-backdrop-filter: blur(28px);
  border: 1px solid rgba(100,130,220,.28);
  border-radius: 18px;
  box-shadow: 0 24px 60px rgba(0,0,0,.55);
}

/* The group heading is itself a link to that Solutions page (lands at the top,
   so the page's own title is the first thing you see). */
.nav-dd-label {
  display: inline-flex;
  align-items: center;
  gap: .4rem;
  font-size: .85rem;
  font-weight: 700;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--teal);
  text-decoration: none;
  padding: .25rem .6rem;
  margin-bottom: .5rem;
  border-radius: 6px;
  transition: background .18s, color .18s;
}
.nav-dd-label::after {
  content: '→';
  font-size: .8rem;
  opacity: 0;
  transform: translateX(-3px);
  transition: opacity .18s, transform .18s;
}
.nav-dd-label:hover {
  color: #fff;
  background: rgba(0,212,180,.14);
}
.nav-dd-label:hover::after { opacity: 1; transform: translateX(0); }

.nav-dd-link {
  display: block;
  padding: .62rem .6rem;
  border-radius: 9px;
  color: #c9d0e8;
  font-size: .95rem;
  font-weight: 500;
  text-decoration: none;
  line-height: 1.35;
  transition: background .18s, color .18s;
}
.nav-dd-link:hover { background: rgba(79,142,247,.12); color: #fff; }
.nav-dd-link span {
  display: block;
  font-size: .9rem;
  font-weight: 400;
  color: var(--muted);
  margin-top: .15rem;
}

/* ── CTA + burger ── */
.nav-actions { display: flex; align-items: center; gap: 1rem; }
.btn-signin {
  background: linear-gradient(135deg, var(--accent), var(--teal));
  color: #03040e;
  border: none;
  padding: .6rem 1.5rem;
  border-radius: var(--radius-pill);
  font-family: 'Space Grotesk', sans-serif;
  font-size: .95rem;
  font-weight: 700;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  white-space: nowrap;
  transition: transform .2s, box-shadow .2s;
}
.btn-signin:hover { transform: translateY(-1px); box-shadow: 0 8px 22px rgba(0,212,180,.32); }

.nav-links-signin { display: none; }

.nav-burger {
  display: none;
  background: none;
  border: 1px solid var(--glass-bd);
  border-radius: 10px;
  padding: .5rem .55rem;
  cursor: pointer;
  line-height: 0;
}
.nav-burger span {
  display: block;
  width: 20px; height: 2px;
  background: var(--text);
  border-radius: 2px;
  transition: transform .25s, opacity .25s;
}
.nav-burger span + span { margin-top: 4px; }
body.nav-open .nav-burger span:nth-child(1) { transform: translateY(6px) rotate(45deg); }
body.nav-open .nav-burger span:nth-child(2) { opacity: 0; }
body.nav-open .nav-burger span:nth-child(3) { transform: translateY(-6px) rotate(-45deg); }

/* ── Mobile: drawer, with the dropdown flattened into the list ── */
@media (max-width: 1000px) {
  .nav-burger { display: block; }
  .nav-actions .btn-signin { display: none; }

  .nav-links {
    position: absolute;
    top: 100%; left: 0; right: 0;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    max-height: calc(100vh - 80px);
    overflow-y: auto;
    padding: .5rem 5vw 1.5rem;
    background: rgba(3,4,14,.98);
    backdrop-filter: blur(24px);
    -webkit-backdrop-filter: blur(24px);
    border-bottom: 1px solid var(--glass-bd);
    transform: translateY(-125%);
    opacity: 0;
    pointer-events: none;
    transition: transform .3s ease, opacity .3s ease;
  }
  body.nav-open .nav-links {
    transform: translateY(0);
    opacity: 1;
    pointer-events: auto;
  }

  .nav-links > a,
  .nav-dd-toggle {
    width: 100%;
    justify-content: space-between;
    padding: 1rem 0;
    font-size: 1.05rem;
    border-bottom: 1px solid rgba(100,130,220,.10);
  }
  .nav-links > a::after,
  .nav-dd-toggle::after { display: none; }

  .nav-item { display: block; width: 100%; }

  /* No hover on touch — the dropdown is an accordion, opened by tap. */
  .nav-dropdown {
    position: static;
    transform: none;
    padding-top: 0;
    opacity: 1;
    pointer-events: auto;
    max-height: 0;
    overflow: hidden;
    transition: max-height .32s ease;
  }
  .nav-item:hover .nav-dropdown { max-height: 0; }
  .nav-item.open .nav-dropdown { max-height: 760px; transform: none; }

  .nav-dd-panel {
    display: block;
    min-width: 0;
    padding: .5rem 0 1rem;
    background: none;
    border: none;
    border-radius: 0;
    box-shadow: none;
  }
  .nav-dd-label { padding: 0; margin-bottom: .4rem; }
  .nav-dd-link { padding: .6rem .75rem; }

  .nav-links-signin {
    display: block;
    margin-top: 1.2rem;
    text-align: center;
    background: linear-gradient(135deg, var(--accent), var(--teal));
    color: #03040e !important;
    font-family: 'Space Grotesk', sans-serif;
    font-weight: 700;
    border-radius: var(--radius-pill);
    padding: .95rem 1.4rem !important;
    border-bottom: none !important;
    font-size: 1rem;
  }
}