/* ============================================================
   Shared dropdown nav — used by the landing page and the docs.
   Reuses --lp-* tokens from landing-page.css / docs.css so it
   theme-switches with everything else.

   HTML pattern:
     <div class="nav-dd">
       <button class="nav-dd-trigger" aria-expanded="false">
         Product <span class="nav-dd-caret">▾</span>
       </button>
       <div class="nav-dd-menu" role="menu">
         <a class="nav-dd-item" href="...">
           <span class="nav-dd-item-title">Build &amp; Connect</span>
           <span class="nav-dd-item-desc">Drag, drop, wire nodes</span>
         </a>
         …
         <div class="nav-dd-sep"></div>
         <a class="nav-dd-item nav-dd-item--footer" href="...">All features →</a>
       </div>
     </div>
   ============================================================ */

.nav-dd { position: relative; display: inline-block; }

.nav-dd-trigger {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 8px 14px;
  border: 0;
  background: transparent;
  color: var(--lp-text);
  font-family: inherit;
  font-size: 14px;
  font-weight: 500;
  border-radius: 8px;
  cursor: pointer;
  transition: background 120ms ease;
}
.nav-dd-trigger:hover,
.nav-dd-trigger[aria-expanded="true"] { background: var(--lp-bg-soft); }
.nav-dd-caret {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 14px;
  height: 14px;
  margin-left: 1px;
  font-size: 0;
  line-height: 0;
  opacity: 0.62;
  flex-shrink: 0;
  transition: transform 120ms ease, opacity 120ms ease;
}
.nav-dd-caret::after {
  content: '';
  display: block;
  width: 12px;
  height: 12px;
  background: currentColor;
  -webkit-mask: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 20 20' fill='none'%3E%3Cpath d='M5 8l5 5 5-5' stroke='%23000' stroke-width='2.2' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E") center / contain no-repeat;
  mask: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 20 20' fill='none'%3E%3Cpath d='M5 8l5 5 5-5' stroke='%23000' stroke-width='2.2' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E") center / contain no-repeat;
}
.nav-dd-trigger:hover .nav-dd-caret,
.nav-dd-trigger[aria-expanded="true"] .nav-dd-caret { opacity: 0.85; }
.nav-dd-trigger[aria-expanded="true"] .nav-dd-caret { transform: rotate(180deg); }
.nav-dd-trigger.is-active { color: var(--lp-primary); }

/* Menu popover */
.nav-dd-menu {
  position: absolute;
  top: calc(100% + 8px);
  left: 50%;
  transform: translateX(-50%) translateY(-4px);
  min-width: 320px;
  max-width: 420px;
  padding: 8px;
  background: var(--lp-bg);
  border: 1px solid var(--lp-border);
  border-radius: 12px;
  box-shadow: var(--lp-shadow-lg);
  opacity: 0;
  pointer-events: none;
  transition: opacity 140ms ease, transform 140ms ease;
  z-index: 100;
}
.nav-dd[data-open="true"] .nav-dd-menu {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
  pointer-events: auto;
}

/* Two-column layout (for Product, which has 6 items) */
.nav-dd-menu--wide { min-width: 560px; max-width: 640px; }
.nav-dd-menu--wide .nav-dd-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2px;
}

/* Items */
.nav-dd-item {
  display: block;
  padding: 10px 12px;
  border-radius: 8px;
  color: var(--lp-text);
  text-decoration: none;
  transition: background 120ms ease;
}
.nav-dd-item:hover {
  background: var(--lp-bg-soft);
  text-decoration: none;
}
.nav-dd-item-title {
  display: block;
  font-size: 14px;
  font-weight: 600;
  color: var(--lp-text);
  margin-bottom: 2px;
}
.nav-dd-item-desc {
  display: block;
  font-size: 12.5px;
  color: var(--lp-text-soft);
  line-height: 1.45;
}

.nav-dd-sep {
  height: 1px;
  background: var(--lp-border);
  margin: 6px 4px;
}

.nav-dd-item--footer {
  font-size: 13px;
  font-weight: 600;
  color: var(--lp-primary);
  padding: 8px 12px;
}
.nav-dd-item--footer:hover { color: var(--lp-primary-hover); background: var(--lp-bg-soft); }

/* Compact list variant (one column, no descriptions) */
.nav-dd-menu--compact { min-width: 240px; max-width: 280px; }
.nav-dd-menu--compact .nav-dd-item { padding: 8px 12px; }
.nav-dd-menu--compact .nav-dd-item-title { margin-bottom: 0; }

/* ── Mobile (sheet style) ──────────────────────────────── */
@media (max-width: 900px) {
  .nav-dd-menu,
  .nav-dd-menu--wide,
  .nav-dd-menu--compact {
    position: fixed;
    top: 56px;
    left: 0;
    right: 0;
    transform: translateY(-8px);
    width: 100%;
    max-width: none;
    min-width: 0;
    border-radius: 0;
    border-left: 0;
    border-right: 0;
    box-shadow: var(--lp-shadow-md);
    padding: 12px 16px;
  }
  .nav-dd[data-open="true"] .nav-dd-menu { transform: translateY(0); }
  .nav-dd-menu--wide .nav-dd-grid { grid-template-columns: 1fr; }
}