/* ----- Navbar: mobile-first ----- */
.nav {
  display: flex;
  align-items: center;
  justify-content: flex-start;
  margin-bottom: 12px;
  position: relative;
  gap: 8px;
  padding: 8px 10px;
  background: var(--bg-elevated);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  width: 100%;
  box-sizing: border-box;
}

/* Hamburger button (always styled independently) */
.nav-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  color: var(--accent);
  min-width: var(--touch-target);
  min-height: var(--touch-target);
  padding: 0;
  border-radius: var(--radius-sm);
  cursor: pointer;
  z-index: 1001;
  flex-shrink: 0;
}
.nav-toggle:hover {
  background: var(--bg-hover);
  border-color: var(--accent);
  box-shadow: 0 0 0 1px var(--accent-glow);
}
.nav-toggle-icon {
  display: block;
}

.nav-theme-toggle {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  color: var(--text-secondary);
  min-width: var(--touch-target);
  min-height: var(--touch-target);
  border-radius: var(--radius-sm);
  flex-shrink: 0;
}

/* Nav links overlay: mobile - centered full screen */
.nav-links {
  display: none;
  z-index: 2000; /* display over anything */
  flex-direction: column;
  gap: 12px;
  position: fixed;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 90%;
  max-width: 320px;
  max-height: min(70vh, 420px);
  background: var(--bg-elevated);
  padding: 24px;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-subtle);
  box-shadow: 0 8px 16px rgba(0,0,0,0.3);
  text-align: center;
  overflow-y: auto;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s ease, transform 0.3s ease;
}

/* Show links with fade-in */
.nav-links.active {
  display: flex;
  opacity: 1;
  pointer-events: auto;
  transform: translate(-50%, -50%) scale(1);
}

/* Links styling */
.nav-links a {
  display: block;
  padding: 10px 16px;
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  color: var(--accent);
  font-size: 16px;
  font-weight: 500;
  text-decoration: none;
  transition: background 0.2s, color 0.2s, border-color 0.2s, box-shadow 0.2s;
}
.nav-links a:hover {
  background: var(--bg-hover);
  border-color: var(--accent);
  color: var(--accent);
  box-shadow: 0 0 12px var(--accent-glow);
}

.site-title,
.nav-title {
  font-size: 0.95rem;
  color: var(--text-primary);
  align-self: center;
  margin-left: 4px;
  cursor: default;
  user-select: none;
  flex: 1;
  min-width: 0;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

/* Hide title on small screens to preserve tap targets */
.site-title,
.nav-title {
  display: none;
}

.nav-actions {
  margin-left: auto;
  display: flex;
  align-items: center;
}

@media (min-width: 480px) {
  .site-title,
  .nav-title {
    display: block;
    font-size: 1rem;
  }
}

/* Desktop: small dropdown under hamburger */
@media (min-width: 768px) {
  .nav {
    gap: 12px;
    padding: 8px 12px;
    margin-bottom: 16px;
  }

  .nav-links {
    position: absolute;
    top: 100%;              /* below hamburger */
    left: 0;                /* align left */
    transform: none;
    width: 200px;
    max-height: none;
    padding: 16px;
    border-radius: 8px;
    flex-direction: column;
    gap: 8px;
    text-align: left;
    box-shadow: 0 8px 16px rgba(0,0,0,0.3);
    transition: opacity 0.2s ease, transform 0.2s ease;
    transform: translateY(-10px);
  }

  .nav-links.active {
    transform: translateY(0);
  }

  /* Keep hamburger visible on desktop */
  .nav-toggle.hidden {
    display: block;
  }
}