/**
 * Sticky app shell — primary tabs + optional vault sub-tabs.
 */
.as-app-nav {
  position: sticky;
  top: 0;
  z-index: 60;
  background-color: rgb(var(--as-page) / 0.96);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid rgb(var(--as-border) / 1);
  margin-bottom: 1rem;
}

.as-app-nav-top {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  padding: 0.625rem 1rem 0;
  max-width: 1600px;
  margin: 0 auto;
}

.as-app-brand {
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
  font-size: 0.875rem;
  font-weight: 600;
  color: rgb(var(--as-text-accent) / 1);
  letter-spacing: -0.01em;
}

.as-app-account {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
  font-size: 10px;
  color: rgb(var(--as-text-muted) / 1);
  min-width: 0;
}

.as-app-account-user {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  max-width: 14rem;
}

.as-app-account-actions {
  display: flex;
  gap: 0.5rem;
  flex-shrink: 0;
}

.as-app-account-actions button,
.as-app-account-actions a {
  color: inherit;
  text-decoration: underline;
  background: transparent;
  border: 0;
  padding: 0;
  font: inherit;
  cursor: pointer;
}

.as-app-account-actions button:hover,
.as-app-account-actions a:hover {
  color: rgb(var(--as-text) / 1);
}

.as-app-tabs {
  display: flex;
  flex-wrap: nowrap;
  gap: 0.125rem;
  overflow-x: auto;
  padding: 0 1rem;
  max-width: 1600px;
  margin: 0 auto;
  scrollbar-width: thin;
}

.as-app-tab {
  display: inline-flex;
  align-items: center;
  flex-shrink: 0;
  touch-action: manipulation;
  -webkit-tap-highlight-color: transparent;
  cursor: pointer;
  padding: 0.625rem 0.875rem;
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
  font-size: 11px;
  font-weight: 500;
  color: rgb(var(--as-text-muted) / 1);
  text-decoration: none;
  border-bottom: 2px solid transparent;
  margin-bottom: -1px;
  transition: color 0.12s ease, border-color 0.12s ease;
}

.as-app-tab:hover {
  color: rgb(var(--as-text) / 1);
}

.as-app-tab[aria-current="page"] {
  color: rgb(var(--as-text-accent) / 1);
  border-bottom-color: rgb(var(--as-accent-text) / 1);
}

.as-app-vault-sub {
  display: flex;
  flex-wrap: wrap;
  gap: 0.375rem;
  padding: 0.375rem 1rem 0.625rem;
  max-width: 1600px;
  margin: 0 auto;
  border-top: 1px solid rgb(var(--as-border) / 0.55);
}

.as-app-vault-sub[hidden] {
  display: none;
}

.as-app-subtab {
  display: inline-flex;
  touch-action: manipulation;
  -webkit-tap-highlight-color: transparent;
  cursor: pointer;
  padding: 0.25rem 0.625rem;
  border-radius: 9999px;
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
  font-size: 10px;
  color: rgb(var(--as-text-muted) / 1);
  text-decoration: none;
  border: 1px solid rgb(var(--as-border) / 1);
  background-color: rgb(var(--as-field) / 0.35);
}

.as-app-subtab:hover {
  color: rgb(var(--as-text) / 1);
  background-color: rgb(var(--as-hover) / 0.5);
}

.as-app-subtab[aria-current="page"] {
  color: rgb(var(--as-text-accent) / 1);
  border-color: rgb(var(--as-accent-text) / 0.45);
  background-color: rgb(var(--as-accent) / 0.12);
}

.as-app-layout-toggle {
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
  font-size: 10px;
  color: rgb(var(--as-text-muted) / 1);
  background: transparent;
  border: 1px solid rgb(var(--as-border) / 1);
  border-radius: 9999px;
  padding: 0.25rem 0.625rem;
  cursor: pointer;
}

.as-app-layout-toggle:hover {
  color: rgb(var(--as-text) / 1);
  background-color: rgb(var(--as-hover) / 0.5);
}

.as-instance-tabs-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 0.375rem;
  padding: 0.375rem 1rem;
  border-bottom: 1px solid rgb(var(--as-border) / 1);
  background-color: rgb(var(--as-field) / 0.45);
  max-width: 1600px;
  margin: 0 auto;
  width: 100%;
}

.as-instance-tabs-bar[hidden] {
  display: none;
}

.as-instance-tab {
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
  border: 1px solid rgb(var(--as-border) / 1);
  border-radius: 9999px;
  background-color: rgb(var(--as-surface) / 0.7);
  padding: 0.125rem 0.25rem 0.125rem 0.5rem;
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
  font-size: 10px;
}

.as-instance-tab-link {
  color: rgb(var(--as-text-muted) / 1);
  text-decoration: none;
}

.as-instance-tab-link:hover,
.as-instance-tab-link[aria-current="page"] {
  color: rgb(var(--as-text-accent) / 1);
}

.as-instance-tab-close {
  border: 0;
  background: transparent;
  color: rgb(var(--as-text-muted) / 1);
  cursor: pointer;
  font-size: 12px;
  line-height: 1;
  padding: 0 0.25rem;
}

.as-instance-tab-close:hover {
  color: rgb(var(--as-text) / 1);
}

.as-folder-tree-folder {
  background: transparent;
  border: 0;
  padding: 0;
  font: inherit;
  cursor: pointer;
  text-align: left;
}

body.as-shell-sidebar {
  flex-direction: row;
  flex-wrap: wrap;
}

body.as-shell-sidebar > [data-as-instance-tabs] {
  order: 1;
  flex: 1 1 100%;
}

body.as-shell-sidebar > [data-as-app-nav] {
  order: 2;
  position: sticky;
  top: 0;
  align-self: flex-start;
  width: min(14rem, 28vw);
  min-height: 100vh;
  margin-bottom: 0;
  border-bottom: 0;
  border-right: 1px solid rgb(var(--as-border) / 1);
}

body.as-shell-sidebar > [data-as-app-nav] .as-app-nav-top {
  flex-direction: column;
  align-items: flex-start;
}

body.as-shell-sidebar > [data-as-app-nav] .as-app-tabs {
  flex-direction: column;
  flex-wrap: nowrap;
  overflow-x: visible;
  padding-bottom: 0.75rem;
}

body.as-shell-sidebar > [data-as-app-nav] .as-app-tab {
  width: 100%;
  border-bottom: 0;
  border-left: 2px solid transparent;
  margin-bottom: 0;
}

body.as-shell-sidebar > [data-as-app-nav] .as-app-tab[aria-current="page"] {
  border-left-color: rgb(var(--as-accent-text) / 1);
}

body.as-shell-sidebar > main,
body.as-shell-sidebar > .as-standalone-main {
  order: 3;
  flex: 1 1 0;
  min-width: 0;
}

.as-folder-tree-drop-target {
  outline: 2px dashed rgb(var(--as-accent-text) / 0.7);
  outline-offset: 2px;
}

.as-folder-tree-draggable {
  cursor: grab;
}

.as-folder-tree-draggable:active {
  cursor: grabbing;
}