/* Top Navigation */
.top-nav {
  height: 60px;
  display: flex;
  align-items: center;
  padding: 0 var(--space-5);
  border-bottom: 0.5px solid var(--border);
  background: var(--surface-1);
  position: sticky;
  top: 0;
  z-index: 100;
}

.top-nav .wordmark { margin-right: 22px; }

.nav-links {
  display: flex;
  gap: 0;
  align-items: center;
  height: 100%;
}

.nav-link {
  display: flex;
  align-items: center;
  height: 100%;
  padding: 0 12px;
  font-size: 13px;
  font-weight: 400;
  color: var(--text-secondary);
  position: relative;
  transition: color 120ms;
}
.nav-link:hover { color: var(--text-primary); }
.nav-link-active {
  color: var(--text-primary);
  font-weight: 500;
}
.nav-link-active::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 12px;
  right: 12px;
  height: 2px;
  background: var(--text-primary);
  border-radius: 1px;
}

.nav-right {
  margin-left: auto;
  display: flex;
  align-items: center;
  gap: 12px;
}

.nav-avatar {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 11px;
  font-weight: 500;
  background: var(--bg-accent);
  color: var(--text-accent);
  cursor: pointer;
}

/* Mobile nav */
.nav-hamburger {
  display: none;
  width: 36px;
  height: 36px;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  color: var(--text-primary);
}

@media (max-width: 1023px) {
  .nav-links { display: none; }
  .nav-hamburger { display: flex; }
  .top-nav .wordmark { position: absolute; left: 50%; transform: translateX(-50%); }
}

/* Mobile drawer */
.mobile-nav-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.4);
  z-index: 200;
  opacity: 0;
  pointer-events: none;
  transition: opacity 200ms;
}
.mobile-nav-overlay.open { opacity: 1; pointer-events: all; }

.mobile-nav-drawer {
  position: fixed;
  top: 0;
  left: 0;
  width: 260px;
  height: 100%;
  background: var(--surface-1);
  z-index: 201;
  transform: translateX(-100%);
  transition: transform 200ms ease;
  padding: var(--space-5);
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}
.mobile-nav-drawer.open { transform: translateX(0); }

.mobile-nav-link {
  display: block;
  padding: 10px 12px;
  font-size: 14px;
  color: var(--text-secondary);
  border-radius: var(--radius);
}
.mobile-nav-link:hover { background: var(--surface-2); }
.mobile-nav-link-active { color: var(--text-primary); font-weight: 500; background: var(--surface-2); }

/* Page header pattern */
.page-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  margin-bottom: var(--space-4);
}
.page-header-left { display: flex; flex-direction: column; gap: 2px; }
.page-header-title-row { display: flex; align-items: baseline; gap: var(--space-3); }
.page-subtitle { font-size: 13px; color: var(--text-secondary); }

/* Settings layout */
.settings-layout {
  display: grid;
  grid-template-columns: 160px 1fr;
  gap: var(--space-5);
}
.settings-nav {
  display: flex;
  flex-direction: column;
  gap: 2px;
  border-right: 0.5px solid var(--border);
  padding-right: var(--space-5);
}
.settings-nav-item {
  display: block;
  padding: 6px 10px;
  font-size: 13px;
  color: var(--text-secondary);
  border-radius: var(--radius);
}
.settings-nav-item:hover { color: var(--text-primary); }
.settings-nav-item-active {
  background: var(--surface-2);
  color: var(--text-primary);
  font-weight: 500;
}

@media (max-width: 639px) {
  .settings-layout { grid-template-columns: 1fr; }
  .settings-nav { flex-direction: row; overflow-x: auto; border-right: none; border-bottom: 0.5px solid var(--border); padding-right: 0; padding-bottom: var(--space-3); }
}

/* Theme toggle */
.theme-toggle {
  width: 28px;
  height: 28px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius);
  color: var(--text-secondary);
  cursor: pointer;
  font-size: 16px;
}
.theme-toggle:hover { color: var(--text-primary); background: var(--fill-control); }