/* nav.css — Navigation bar: fixed positioning, scroll shadow, mobile menu */

#nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  width: 100%;
  z-index: 100;
  background: var(--bg);
  border-bottom: 1px solid var(--border);
  transition: background 0.25s, border-color 0.25s, box-shadow 0.2s;
}

#nav.scrolled {
  box-shadow: var(--shadow);
}

.nav-inner {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 24px;
  height: var(--nav-h);
  display: flex;
  align-items: center;
  gap: 24px;
}

.nav-logo {
  font-weight: 800;
  font-size: 1.2rem;
  color: var(--primary);
  letter-spacing: -0.5px;
  flex-shrink: 0;
}

.nav-links {
  display: flex;
  gap: 28px;
  list-style: none;
  margin-left: auto;
}

.nav-links a {
  color: var(--text-muted);
  font-size: 0.95rem;
  transition: color 0.15s;
}

.nav-links a:hover {
  color: var(--text);
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 12px;
}

.nav-cta {
  padding: 9px 20px;
  font-size: 0.9rem;
}

.nav-menu-btn {
  display: none;
}

/* ── Auth area ───────────────────────────────────────────────────────────── */

.nav-signin-btn {
  padding: 7px 16px;
  font-size: 0.9rem;
  border: 1.5px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text-muted);
  transition: border-color 0.15s, color 0.15s;
  white-space: nowrap;
}

.nav-signin-btn:hover {
  border-color: var(--primary);
  color: var(--primary);
}

.nav-user {
  display: flex;
  align-items: center;
  gap: 8px;
}

.nav-avatar {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  object-fit: cover;
  border: 2px solid var(--border);
  flex-shrink: 0;
}

.nav-username {
  font-size: 0.9rem;
  color: var(--text);
  font-weight: 500;
  max-width: 80px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.nav-logout-btn {
  padding: 6px 14px;
  font-size: 0.85rem;
  border: 1.5px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text-muted);
  transition: border-color 0.15s, color 0.15s;
  white-space: nowrap;
}

.nav-logout-btn:hover {
  border-color: #e74c3c;
  color: #e74c3c;
}

.nav-avatar-letter {
  background-size: cover;
  background-position: center;
  background-color: var(--bg-alt);
  display: block !important;
}

/* Theme toggle icon visibility */
#theme-toggle .icon-sun,
#theme-toggle .icon-moon {
  display: block;
  line-height: 1;
}

/* Mobile menu */
.nav-mobile {
  display: none;
  flex-direction: column;
  background: var(--bg);
  border-bottom: 1px solid var(--border);
  padding: 16px 24px;
  gap: 16px;
}

.nav-mobile.open {
  display: flex;
}

.nav-mobile a {
  color: var(--text-muted);
  font-size: 0.95rem;
  transition: color 0.15s;
  width: 100%;
  padding: 4px 0;
}

.nav-mobile a:hover {
  color: var(--text);
}

.nav-mobile .btn-primary {
  width: 100%;
  text-align: center;
}

/* ── Mobile breakpoint ───────────────────────────────────────────────────── */

@media (max-width: 768px) {
  .nav-links {
    display: none;
  }

  .nav-menu-btn {
    display: flex;
  }
}