/* ══════════════════════════════════════════════════════
   SHARED NAV — single source of truth.
   Mirrors index.html's actual rendered nav exactly.
   Edit here, not per-page — every page includes this file.
══════════════════════════════════════════════════════ */

.topnav {
  height: 64px;
  padding: 0 36px;
  background: rgba(255,255,255,0.75);
  backdrop-filter: blur(36px) saturate(200%);
  -webkit-backdrop-filter: blur(36px) saturate(200%);
  border-bottom: 1px solid var(--border);
  display: flex; align-items: center; gap: 12px;
  position: sticky; top: 0; z-index: 60;
  transition: background 0.45s ease, border-color 0.45s ease, box-shadow 0.45s ease;
}
.topnav.nav-scrolled {
  background: rgba(255,255,255,0.94);
  box-shadow: 0 1px 0 rgba(0,0,0,0.02), 0 8px 40px rgba(20,20,40,0.06);
}

.logo-mark {
  width: 32px; height: 32px; border-radius: 9px;
  background: var(--accent);
  border: 1px solid var(--accent);
  box-shadow: inset 0 1px 0 rgba(255,255,255,0.25);
  display: flex; align-items: center; justify-content: center;
  flex-shrink: 0;
}
.logo-mark span { color: #ffffff; font-weight: 800; font-size: 15px; letter-spacing: -0.5px; }
.logo-name { font-size: 15px; font-weight: 700; letter-spacing: -0.03em; color: var(--navy); }

.topnav-menu { position: relative; display: flex; align-items: center; }
.topnav-menu ul { list-style: none; display: flex; gap: 2px; margin: 0; padding: 0; }
.topnav-menu ul li a {
  font-size: 11.5px; font-weight: 500; letter-spacing: 0.1em; text-transform: uppercase;
  color: #6b6b7f; text-decoration: none;
  padding: 7px 16px; border-radius: 6px; position: relative; display: block;
  transition: color 0.22s ease, background 0.22s ease, box-shadow 0.22s ease;
}
.topnav-menu ul li a:hover { color: var(--navy); background: rgba(79,70,229,0.06); box-shadow: none; }
.topnav-menu ul li a.nav-active { color: var(--accent); }

#nav-underline {
  position: absolute; height: 2px; width: 0; left: 0; bottom: 0; opacity: 0;
  background: var(--accent); border-radius: 2px;
  transition: left 0.28s cubic-bezier(0.4,0,0.2,1), width 0.28s cubic-bezier(0.4,0,0.2,1), opacity 0.22s ease;
}

.nav-login-btn {
  background: transparent; color: var(--navy);
  border: 1px solid var(--border); border-radius: 8px;
  padding: 7px 22px; font-size: 12px; font-weight: 500;
  letter-spacing: 0.08em; text-transform: uppercase;
  cursor: pointer; font-family: inherit;
  backdrop-filter: blur(8px);
  box-shadow: none;
  transition: background 0.22s ease, border-color 0.22s ease, color 0.22s ease, box-shadow 0.22s ease;
}
.nav-login-btn:hover { background: rgba(79,70,229,0.06); border-color: var(--accent); color: var(--accent); box-shadow: none; }

/* ── Mega-nav dropdown (desktop: hover/focus) ── */
.topnav-dropdown { position: relative; list-style: none; }
.topnav-dropdown-trigger {
  font-size: 11.5px; font-weight: 500; letter-spacing: 0.1em; text-transform: uppercase;
  color: #6b6b7f; background: none; border: none; font-family: inherit; cursor: pointer;
  padding: 7px 16px; border-radius: 6px; display: flex; align-items: center; gap: 4px;
  transition: color 0.22s ease, background 0.22s ease;
}
.topnav-dropdown-trigger:hover, .topnav-dropdown-trigger:focus-visible,
.topnav-dropdown.open .topnav-dropdown-trigger,
.topnav-dropdown-trigger.nav-active { color: var(--accent); background: rgba(79,70,229,0.06); }
.topnav-caret { font-size: 9px; transition: transform 0.2s ease; }
.topnav-dropdown.open .topnav-caret, .topnav-dropdown:hover .topnav-caret { transform: rotate(180deg); }

.topnav-dropdown-panel {
  position: absolute; top: calc(100% + 10px); left: 50%; transform: translateX(-50%) translateY(-6px);
  min-width: 260px; background: #fff; border: 1px solid var(--border); border-radius: 12px;
  box-shadow: 0 12px 40px rgba(20,20,40,0.12); padding: 8px; display: flex; flex-direction: column; gap: 2px;
  opacity: 0; visibility: hidden; pointer-events: none;
  transition: opacity 0.18s ease, transform 0.18s ease, visibility 0.18s;
  z-index: 70;
}
.topnav-dropdown:hover .topnav-dropdown-panel,
.topnav-dropdown:focus-within .topnav-dropdown-panel,
.topnav-dropdown.open .topnav-dropdown-panel {
  opacity: 1; visibility: visible; pointer-events: auto; transform: translateX(-50%) translateY(0);
}
.topnav-dropdown-panel a {
  display: flex; flex-direction: column; gap: 2px; padding: 10px 12px; border-radius: 8px;
  text-decoration: none; color: var(--navy); text-transform: none; letter-spacing: normal;
}
.topnav-dropdown-panel a:hover { background: rgba(79,70,229,0.06); }
.topnav-dropdown-panel a strong { font-size: 13.5px; font-weight: 600; }
.topnav-dropdown-panel a span { font-size: 12px; color: var(--muted); font-weight: 400; }

/* ── Mobile hamburger + slide panel ── */
.topnav-burger {
  display: none; background: none; border: none; cursor: pointer; padding: 8px 6px;
  border-radius: 6px; flex-direction: column; gap: 4.5px; margin-left: 4px; flex-shrink: 0;
}
.topnav-burger:hover { background: rgba(30,37,50,0.07); }
.topnav-burger span { display: block; width: 20px; height: 2px; background: var(--navy); border-radius: 1px; transition: all 0.2s ease; }
.topnav-burger[aria-expanded="true"] span:nth-child(1) { transform: translateY(6.5px) rotate(45deg); }
.topnav-burger[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.topnav-burger[aria-expanded="true"] span:nth-child(3) { transform: translateY(-6.5px) rotate(-45deg); }

.topnav-mobile-panel {
  display: none; position: fixed; top: 64px; left: 0; right: 0; bottom: 0; z-index: 59;
  background: #fff; padding: 12px 20px 32px; overflow-y: auto;
  transform: translateY(-8px); opacity: 0; pointer-events: none;
  transition: opacity 0.2s ease, transform 0.2s ease;
}
.topnav-mobile-panel.open { opacity: 1; transform: translateY(0); pointer-events: auto; }
.topnav-mobile-panel ul { list-style: none; margin: 0; padding: 0; }
.topnav-mobile-panel li a {
  display: block; padding: 14px 4px; font-size: 15px; font-weight: 600; color: var(--navy);
  text-decoration: none; border-bottom: 1px solid var(--border);
}
.topnav-mobile-panel li a.topnav-mobile-sub { font-size: 14px; font-weight: 500; padding-left: 14px; color: var(--muted); }
.topnav-mobile-subhead {
  padding: 14px 4px 4px; font-size: 11px; font-weight: 700; letter-spacing: 0.1em;
  text-transform: uppercase; color: var(--muted);
}
.topnav-mobile-auth { margin-top: 20px; display: flex; }
.topnav-mobile-auth button { width: 100%; }

@media (max-width: 900px) {
  .topnav-menu { display: none; }
  .topnav { padding: 0 20px; }
  .topnav-burger { display: flex; }
  #nav-auth-area { display: none !important; }
}
@media (min-width: 901px) {
  .topnav-mobile-panel { display: none !important; }
}