/* Shared top bar + hamburger drawer. Reuses the page theme variables
   (--bg, --card, --primary, --border, --text, --muted). */

#app-nav {
  --nav-h: 3.25rem;
}

.nav-bar {
  position: sticky;
  top: 0;
  z-index: 40;
  display: flex;
  align-items: center;
  gap: 0.75rem;
  height: var(--nav-h);
  padding: 0 0.75rem;
  background: var(--card, #102a43);
  border-bottom: 1px solid var(--border, #1e3a57);
}

.nav-title {
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--text, #f5f8fc);
}

.nav-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2.5rem;
  height: 2.5rem;
  padding: 0;
  background: transparent;
  border: 1px solid var(--border, #1e3a57);
  border-radius: 0.5rem;
  color: var(--text, #f5f8fc);
  cursor: pointer;
}
.nav-toggle:active {
  background: rgba(255, 255, 255, 0.06);
}

.nav-burger,
.nav-burger::before,
.nav-burger::after {
  content: "";
  display: block;
  width: 1.15rem;
  height: 2px;
  background: currentColor;
  border-radius: 2px;
}
.nav-burger {
  position: relative;
}
.nav-burger::before {
  position: absolute;
  top: -6px;
}
.nav-burger::after {
  position: absolute;
  top: 6px;
}

.nav-backdrop {
  position: fixed;
  inset: 0;
  z-index: 50;
  background: rgba(0, 0, 0, 0.5);
}

.nav-drawer {
  position: fixed;
  top: 0;
  left: 0;
  z-index: 60;
  width: min(78vw, 20rem);
  height: 100%;
  padding: 0.5rem 0;
  background: var(--card, #102a43);
  border-right: 1px solid var(--border, #1e3a57);
  box-shadow: 2px 0 18px rgba(0, 0, 0, 0.45);
  overflow-y: auto;
}

.nav-drawer-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.75rem 1rem;
  font-weight: 600;
  color: var(--muted, #9fb3c8);
  border-bottom: 1px solid var(--border, #1e3a57);
}

.nav-close {
  background: transparent;
  border: none;
  color: var(--muted, #9fb3c8);
  font-size: 1.6rem;
  line-height: 1;
  cursor: pointer;
}

.nav-links {
  list-style: none;
  margin: 0;
  padding: 0.5rem 0;
}
.nav-links li {
  margin: 0;
}
.nav-links a {
  display: block;
  padding: 0.85rem 1rem;
  color: var(--text, #f5f8fc);
  text-decoration: none;
  font-size: 1.05rem;
}
.nav-links a:hover {
  background: rgba(255, 255, 255, 0.05);
}
.nav-links a.active {
  color: var(--primary, #2f80ed);
  font-weight: 600;
  box-shadow: inset 3px 0 0 var(--primary, #2f80ed);
}
.nav-loading {
  padding: 0.85rem 1rem;
  color: var(--muted, #9fb3c8);
}
.nav-sep {
  margin-top: 0.5rem;
  border-top: 1px solid var(--border, #1e3a57);
}

body.nav-open {
  overflow: hidden;
}