/* settings.layout.css — Layout, Sidebar, Nav, Panels */

.settings-layout {
  display: flex;
  height: calc(100vh - var(--topbar-height));
  overflow: hidden;
}

.settings-sidebar {
  width: 200px;
  flex-shrink: 0;
  background: var(--bg2);
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  height: 100%;
  position: relative;
  z-index: 1;
}

.settings-sidebar-header {
  height: var(--topbar-height);
  display: flex;
  align-items: center;
  padding: 0 var(--space-4);
  border-bottom: 1px solid var(--border);
  flex-shrink: 0;
}

.settings-sidebar-title {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--text2);
  display: flex;
  align-items: center;
  gap: var(--space-2);
  user-select: none;
}

.settings-sidebar-slash { color: var(--accent); font-weight: 600; }

.settings-nav {
  flex: 1;
  padding: var(--space-3) 0;
  display: flex;
  flex-direction: column;
  gap: 2px;
  overflow-y: auto;
}

.settings-nav-item {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-2) var(--space-4);
  width: 100%;
  text-align: left;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--text3);
  border-left: 2px solid transparent;
  transition: all var(--transition-fast);
  cursor: pointer;
  letter-spacing: 0.02em;
}

.settings-nav-item:hover { color: var(--text2); background: var(--bg3); }
.settings-nav-item.active {
  color: var(--accent);
  border-left-color: var(--accent);
  background: color-mix(in srgb, var(--accent) 8%, transparent);
}

.settings-nav-icon {
  font-size: 13px;
  width: 16px;
  text-align: center;
  flex-shrink: 0;
  opacity: 0.5;
  transition: opacity var(--transition-fast);
}

.settings-nav-item:hover .settings-nav-icon,
.settings-nav-item.active .settings-nav-icon { opacity: 1; }

.settings-sidebar-footer {
  padding: var(--space-3) var(--space-4);
  border-top: 1px solid var(--border);
  flex-shrink: 0;
}

.settings-build { display: flex; align-items: center; gap: var(--space-2); }
.settings-build-label,
.settings-build-value {
  font-family: var(--font-mono);
  font-size: 10px;
  color: var(--text3);
  opacity: 0.5;
}

.settings-content {
  flex: 1;
  overflow-y: auto;
  background: var(--bg);
  min-width: 0;
}

.settings-content::-webkit-scrollbar { width: 4px; }
.settings-content::-webkit-scrollbar-thumb {
  background: var(--scrollbar-thumb);
  border-radius: 999px;
}

.settings-panel { display: none; padding: var(--space-6) var(--space-7); max-width: 720px; }
.settings-panel.active { display: block; }

.settings-panel-header {
  margin-bottom: var(--space-7);
  padding-bottom: var(--space-5);
  border-bottom: 1px solid var(--border);
}

.settings-panel-title {
  font-family: var(--font-heading);
  font-size: 20px;
  font-weight: 700;
  color: var(--text);
  letter-spacing: -0.02em;
}

.settings-panel-sub {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--text3);
  margin-top: var(--space-1);
}