/* App shell */
.app-layout {
  display: grid;
  grid-template-columns: var(--sidebar-width) 1fr;
  height: 100vh;
  overflow: hidden;
  background: var(--color-bg);
  transition: grid-template-columns 0.2s ease;
}

.app-layout--sidebar-collapsed {
  grid-template-columns: var(--sidebar-width-collapsed) 1fr;
}

.app-layout--sidebar-collapsed .sidebar {
  width: var(--sidebar-width-collapsed);
  min-width: var(--sidebar-width-collapsed);
  padding: var(--space-3) var(--space-2);
}

.app-main {
  display: flex;
  flex-direction: column;
  min-width: 0;
  min-height: 0;
  overflow: hidden;
}

.app-content {
  flex: 1;
  min-height: 0;
  overflow-y: auto;
  overflow-x: hidden;
  padding: var(--space-4) var(--space-5);
}

.app-content:has(.panel--table) {
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

/* Sidebar */
.sidebar {
  display: flex;
  flex-direction: column;
  gap: var(--space-5);
  width: var(--sidebar-width);
  min-width: var(--sidebar-width);
  height: 100vh;
  overflow: hidden;
  padding: var(--space-4) var(--space-3);
  background: var(--color-sidebar);
  color: var(--color-sidebar-text);
  border-right: 1px solid var(--color-sidebar-border);
  transition:
    width 0.2s ease,
    min-width 0.2s ease,
    padding 0.2s ease;
}

.sidebar-brand {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  width: 100%;
  padding: var(--space-2) var(--space-2);
  border: none;
  background: transparent;
  text-align: left;
  cursor: pointer;
}

.sidebar-brand:focus-visible {
  outline: 2px solid rgba(219, 234, 254, 0.65);
  outline-offset: 2px;
  border-radius: var(--radius-sm);
}

.brand-icon {
  width: 36px;
  height: 36px;
  display: grid;
  place-items: center;
  border-radius: var(--radius-sm);
  color: #dbeafe;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.08);
}

.brand-icon svg {
  width: 18px;
  height: 18px;
}

.sidebar-brand__text strong {
  display: block;
  font-size: 0.8125rem;
  font-weight: 700;
  color: #ffffff;
  letter-spacing: -0.01em;
}

.sidebar-brand__text span {
  display: block;
  margin-top: 1px;
  font-size: 0.6875rem;
  color: var(--color-sidebar-muted);
}

.sidebar-nav {
  display: grid;
  gap: 2px;
  padding: 0 var(--space-1);
}

.sidebar-link {
  display: flex;
  align-items: center;
  gap: 10px;
  width: 100%;
  text-align: left;
  padding: 9px 12px;
  border: none;
  border-radius: var(--radius-sm);
  background: transparent;
  color: var(--color-sidebar-text);
  font-size: 0.8125rem;
  font-weight: 600;
  transition:
    background 0.18s ease,
    color 0.18s ease;
}

.sidebar-link__label {
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.sidebar-link:hover {
  background: rgba(255, 255, 255, 0.06);
  color: #ffffff;
}

.sidebar-link.active {
  background: rgba(91, 141, 239, 0.24);
  color: #ffffff;
}

.sidebar-footer {
  margin-top: auto;
  padding: var(--space-3) var(--space-2) 0;
  border-top: 1px solid var(--color-sidebar-border);
}

.sidebar-footer__success {
  margin: 0 0 var(--space-2);
  padding: 0.45rem 0.55rem;
  border-radius: var(--radius-sm);
  background: rgba(34, 197, 94, 0.15);
  color: #bbf7d0;
  font-size: 0.6875rem;
  font-weight: 600;
  line-height: 1.4;
}

.user-info {
  margin-bottom: var(--space-3);
}

.user-info--clickable {
  width: 100%;
  padding: 0;
  border: none;
  background: transparent;
  text-align: left;
  cursor: pointer;
  border-radius: var(--radius-sm);
  transition: background 0.18s ease;
}

.user-info--clickable:hover {
  background: var(--color-sidebar-elevated);
}

.user-info--clickable:focus-visible {
  outline: 2px solid rgba(255, 255, 255, 0.35);
  outline-offset: 2px;
}

.user-info__text strong {
  display: block;
  color: #ffffff;
  font-size: 0.8125rem;
  font-weight: 600;
}

.user-info__text span {
  display: block;
  margin-top: 1px;
  font-size: 0.6875rem;
  color: var(--color-sidebar-muted);
}

.logout-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  width: 100%;
  border: 1px solid var(--color-sidebar-border);
  background: transparent;
  color: var(--color-sidebar-text);
  border-radius: var(--radius-sm);
  padding: 8px 10px;
  font-size: 0.75rem;
  font-weight: 600;
  transition: background 0.18s ease;
}

.sidebar--collapsed .sidebar-brand {
  justify-content: center;
  padding-inline: 0;
}

.sidebar--collapsed .sidebar-brand__text {
  display: none;
}

.sidebar--collapsed .sidebar-nav {
  padding-inline: 0;
}

.sidebar--collapsed .sidebar-link {
  justify-content: center;
  padding: 10px;
}

.sidebar--collapsed .sidebar-link__label {
  display: none;
}

.sidebar--collapsed .user-info--clickable {
  display: grid;
  place-items: center;
  padding: 8px 0;
}

.sidebar--collapsed .user-info__text {
  display: none;
}

.sidebar--collapsed .logout-btn {
  padding: 10px;
}

.sidebar--collapsed .logout-btn__label {
  display: none;
}

.logout-btn:hover {
  background: var(--color-sidebar-elevated);
}

/* Tab bar */
.tab-bar {
  display: flex;
  align-items: stretch;
  flex-shrink: 0;
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
}

.tab-list {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  flex: 1;
  min-width: 0;
  min-height: var(--header-height);
  padding: 0 var(--space-5);
  overflow-x: auto;
}

.tab-bar__actions {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  flex-shrink: 0;
  min-height: var(--header-height);
  padding: 0 var(--space-3);
  border-left: 1px solid var(--color-border);
  background: var(--color-surface);
}

.tab-bar__hint {
  max-width: 12rem;
  margin: 0;
  padding: 0.35rem 0.5rem;
  border-radius: var(--radius-sm);
  background: #fef3c7;
  color: #92400e;
  font-size: 0.6875rem;
  font-weight: 600;
  line-height: 1.35;
}

.tab-bar__tutorial {
  display: grid;
  place-items: center;
  width: 1.5rem;
  height: 1.5rem;
  padding: 0;
  border: 1px solid var(--color-border);
  border-radius: 999px;
  background: #fff;
  color: var(--color-text-secondary);
  font-family: ui-serif, Georgia, 'Times New Roman', serif;
  font-size: 0.75rem;
  font-weight: 700;
  line-height: 1;
  cursor: pointer;
  transition:
    background 0.15s ease,
    border-color 0.15s ease,
    color 0.15s ease;
}

.tab-bar__tutorial:hover {
  border-color: var(--color-primary);
  background: var(--color-primary-soft);
  color: var(--color-primary);
}

.tab-bar__sidebar-toggle {
  display: grid;
  place-items: center;
  flex-shrink: 0;
  width: 2rem;
  height: 2rem;
  margin-right: var(--space-1);
  padding: 0;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  background: #fff;
  color: var(--color-text-secondary);
  cursor: pointer;
  transition:
    background 0.15s ease,
    border-color 0.15s ease,
    color 0.15s ease;
}

.tab-bar__sidebar-toggle svg {
  width: 1.05rem;
  height: 1.05rem;
}

.tab-bar__sidebar-toggle:hover {
  border-color: var(--color-primary);
  background: var(--color-primary-soft);
  color: var(--color-primary);
}

.tab-bar__sidebar-toggle:focus-visible {
  outline: none;
  box-shadow: 0 0 0 3px rgba(23, 75, 204, 0.18);
}

.tab-wrapper {
  display: flex;
  align-items: center;
  border-radius: var(--radius-sm);
}

.tab-wrapper.active {
  background: var(--color-primary);
}

.tab-item {
  position: relative;
  display: inline-block;
  max-width: 220px;
  overflow: hidden;
  text-overflow: ellipsis;
  padding: 8px 10px 8px 12px;
  color: var(--color-text-muted);
  font-size: 0.8125rem;
  font-weight: 600;
  white-space: nowrap;
  transition: color 0.18s ease;
}

.tab-item.pinned {
  color: var(--color-text-secondary);
}

.tab-item:hover,
.tab-wrapper:hover .tab-item {
  color: var(--color-primary);
}

.tab-wrapper.active .tab-item {
  color: #ffffff;
}

.tab-wrapper.active .tab-item:hover {
  color: #ffffff;
}

.tab-item.active::after,
.tab-wrapper.active .tab-item::after {
  display: none;
}

.tab-item.pinned.active {
  color: var(--color-primary);
}

.tab-close {
  display: grid;
  place-items: center;
  width: 24px;
  height: 24px;
  margin-right: 4px;
  border: none;
  border-radius: 4px;
  background: transparent;
  color: var(--color-text-muted);
}

.tab-close svg {
  display: block;
  width: 14px;
  height: 14px;
}

.tab-wrapper.active .tab-close {
  color: rgba(255, 255, 255, 0.85);
}

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

.tab-wrapper.active .tab-close:hover {
  color: #ffffff;
}

.tab-divider {
  width: 1px;
  height: 16px;
  background: var(--color-border);
}

@media (max-width: 960px) {
  .app-layout {
    grid-template-columns: 1fr;
  }

  .sidebar,
  .app-layout--sidebar-collapsed .sidebar {
    position: fixed;
    inset: 0 auto 0 0;
    z-index: 300;
    width: var(--sidebar-width);
    min-width: var(--sidebar-width);
    padding: var(--space-4) var(--space-3);
    transform: translateX(-100%);
    transition: transform 0.28s ease;
    box-shadow: 0 10px 30px rgba(16, 24, 40, 0.25);
  }

  .sidebar--mobile-open {
    transform: translateX(0);
  }

  .app-layout--sidebar-collapsed {
    grid-template-columns: 1fr;
  }

  .app-content,
  .tab-list {
    padding-left: var(--space-3);
    padding-right: var(--space-3);
  }

  .tab-bar__actions {
    padding: 0 var(--space-2);
  }

  .tab-bar__hint {
    display: none;
  }
}

@media (max-width: 768px) {
  .app-content {
    padding: var(--space-2) var(--space-3);
  }

  .tab-list {
    padding-left: var(--space-3);
    padding-right: var(--space-3);
  }
}