.app-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 20px;
  background: var(--bg);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 100;
  height: 52px;
}

.brand-lockup {
  display: flex;
  align-items: center;
  gap: 9px;
  color: var(--text);
  text-decoration: none;
}

.brand-logo {
  color: var(--text);
  flex-shrink: 0;
}

.app-header h1 {
  font-size: 15px;
  font-weight: 600;
  letter-spacing: -0.01em;
}

.brand-sub {
  font-size: 12px;
  color: var(--muted);
  padding-left: 8px;
  border-left: 1px solid var(--border);
}

@media (max-width: 640px) {
  .brand-sub {
    display: none;
  }
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 8px;
}

.tool-switcher {
  display: inline-flex;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 2px;
  gap: 2px;
}

.tool-tab {
  background: none;
  border: none;
  color: var(--muted);
  font-family: inherit;
  font-size: 12.5px;
  font-weight: 500;
  padding: 5px 12px;
  border-radius: 3px;
  cursor: pointer;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
}

.tool-tab:hover {
  color: var(--text);
}

.tool-tab.active {
  background: var(--surface-2);
  color: var(--text);
  font-weight: 600;
}

.menu {
  position: relative;
}

.btn-menu {
  gap: 6px;
  color: var(--text);
  font-size: 13px;
}

.menu-chevron {
  color: var(--muted);
  transition: transform 0.16s ease, color 0.16s ease;
}

.menu[open] > .btn-menu {
  background: #2b3138;
  border-color: #4b535c;
  color: var(--text);
}

.menu[open] .menu-chevron {
  transform: rotate(180deg);
  color: var(--text);
}

.menu-list {
  position: absolute;
  right: 0;
  top: calc(100% + 6px);
  min-width: 210px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 4px;
  display: flex;
  flex-direction: column;
  z-index: 200;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.45);
}

.menu-list button,
.menu-file {
  background: none;
  border: none;
  color: var(--text);
  font: inherit;
  font-size: 13px;
  text-align: left;
  padding: 7px 10px;
  border-radius: 3px;
  cursor: pointer;
}

.menu-list button:hover,
.menu-file:hover {
  background: var(--surface-2);
}

.menu-list .danger {
  color: var(--danger);
}

.app-workspace {
  display: grid;
  grid-template-columns: 410px 1fr;
  flex: 1;
  min-height: calc(100vh - 52px);
}

@media (max-width: 1100px) {
  .app-workspace {
    grid-template-columns: 1fr;
  }
}

.sidebar {
  border-right: 1px solid var(--border);
  padding: 0 20px 24px;
  overflow-y: auto;
  max-height: calc(100vh - 52px);
}

@media (max-width: 1100px) {
  .sidebar {
    max-height: none;
    border-right: none;
    border-bottom: 1px solid var(--border);
  }
}

.panel {
  padding: 18px 0;
  border-bottom: 1px solid var(--border);
}

.panel:last-child {
  border-bottom: none;
}

.panel-header {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  margin-bottom: 12px;
}

.panel-header h2 {
  font-size: 13px;
  font-weight: 600;
}

.panel-header-links {
  display: flex;
  align-items: center;
  gap: 10px;
}

.count {
  color: var(--muted);
  font-weight: 400;
  margin-left: 6px;
  font-size: 12px;
}

.card-list-sidebar {
  display: flex;
  flex-direction: column;
  max-height: 300px;
  overflow-y: auto;
}

.sidebar-card-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  padding: 7px 6px;
  border-bottom: 1px solid var(--border);
}

.sidebar-card-item:last-child {
  border-bottom: none;
}

.sidebar-card-item.editing {
  background: var(--surface-2);
}

.sidebar-card-info {
  min-width: 0;
  flex: 1;
  cursor: pointer;
}

.sidebar-card-title {
  font-size: 13px;
  font-weight: 500;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.sidebar-card-meta {
  font-size: 11.5px;
  color: var(--muted);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  margin-top: 1px;
}

.sidebar-card-actions {
  display: flex;
  gap: 2px;
}

.empty-sidebar-msg {
  color: var(--muted);
  font-size: 12px;
  padding: 8px 0;
}

.disclaimer {
  padding: 16px 0 0;
  font-size: 11px;
  color: var(--muted);
  line-height: 1.5;
}

.lookup-dropdown {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  margin-top: 4px;
  max-height: 210px;
  overflow-y: auto;
  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.45);
  z-index: 50;
}

.lookup-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  width: 100%;
  text-align: left;
  background: none;
  border: none;
  border-bottom: 1px solid var(--border);
  color: var(--text);
  padding: 7px 10px;
  font-family: inherit;
  font-size: 12px;
  cursor: pointer;
}

.lookup-item:last-child {
  border-bottom: none;
}

.lookup-item:hover {
  background: var(--surface-2);
}

.lookup-item-left {
  display: flex;
  align-items: center;
  gap: 8px;
  min-width: 0;
}

.lookup-thumb {
  width: 24px;
  height: 33px;
  object-fit: cover;
  border-radius: 2px;
  flex-shrink: 0;
  background: #222;
}

.lookup-item-name {
  font-weight: 600;
  color: var(--text);
}

.lookup-item-meta {
  color: var(--muted);
  font-family: var(--font-num);
  font-size: 11px;
  white-space: nowrap;
}

.lookup-status {
  padding: 8px 10px;
  font-size: 12px;
  color: var(--muted);
}

.modal-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.65);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 16px;
  z-index: 300;
}

.modal-card {
  width: 100%;
  max-width: 560px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 18px 20px;
  box-shadow: 0 12px 36px rgba(0, 0, 0, 0.55);
}

.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 8px;
}

.modal-header h3 {
  font-size: 14px;
  font-weight: 600;
}

.btn-close {
  background: none;
  border: none;
  color: var(--muted);
  font-size: 20px;
  cursor: pointer;
  line-height: 1;
}

.btn-close:hover {
  color: var(--text);
}

.modal-desc {
  font-size: 12px;
  color: var(--muted);
  margin-bottom: 10px;
  line-height: 1.45;
}

.modal-desc code {
  color: var(--text);
  background: var(--bg);
  padding: 1px 5px;
  border-radius: 3px;
  font-family: var(--font-num);
}

.modal-actions {
  display: flex;
  justify-content: flex-end;
  gap: 8px;
  margin-top: 12px;
}

.toast {
  position: fixed;
  bottom: 20px;
  right: 20px;
  background: var(--surface-2);
  color: var(--text);
  border: 1px solid var(--accent);
  padding: 9px 14px;
  border-radius: 5px;
  font-size: 12.5px;
  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.45);
  z-index: 400;
}