/**
 * App shell V2 — Visual Modernization Recovery
 * Dark premium sidebar + quiet workspace chrome.
 */

.app {
  grid-template-columns: var(--v2-sidebar-w) minmax(0, 1fr);
  background: var(--v2-bg);
}

.app.is-sidebar-collapsed {
  grid-template-columns: var(--v2-sidebar-collapsed-w) minmax(0, 1fr);
}

.sidebar {
  width: auto;
  background: var(--v2-sidebar-bg);
  color: var(--v2-sidebar-ink);
  border-right: 1px solid rgba(255, 255, 255, 0.06);
  display: flex;
  flex-direction: column;
  min-height: 100vh;
  padding: 0;
}

.sidebar-brand {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 18px 16px 16px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
  min-height: var(--v2-topbar-h);
}

.sidebar-brand-logo {
  flex-shrink: 0;
}

.sidebar-brand-mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: var(--v2-radius-md);
  background: linear-gradient(145deg, var(--v2-brand) 0%, var(--v2-brand-strong) 100%);
  color: #fff;
  font-weight: 700;
  font-size: 0.95rem;
  letter-spacing: -0.02em;
  box-shadow: none;
}

.sidebar-brand-name {
  color: #f8fafc;
  font-size: 0.95rem;
  font-weight: 650;
  letter-spacing: -0.02em;
}

.sidebar-brand-tagline {
  color: var(--v2-sidebar-muted);
  font-size: 0.7rem;
}

.sidebar .nav {
  flex: 1 1 auto;
  overflow: auto;
  padding: 12px 10px 16px;
  display: flex;
  flex-direction: column;
  gap: 18px;
}

.sidebar .nav-group {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.sidebar .nav-group--divided {
  padding-top: 4px;
  border-top: 1px solid rgba(255, 255, 255, 0.06);
}

.sidebar .nav-group__label,
.sidebar .nav-section-label {
  margin: 0 8px 6px;
  padding: 0;
  font-size: 0.65rem;
  font-weight: 650;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: #64748b;
}

.sidebar .nav-item {
  display: flex;
  align-items: center;
  gap: 10px;
  min-height: 40px;
  padding: 8px 10px;
  margin: 0;
  border: 0;
  border-radius: var(--v2-radius-md);
  background: transparent;
  color: var(--v2-sidebar-ink);
  font-weight: 500;
  font-size: 0.875rem;
  text-decoration: none;
  transition: background 0.12s ease, color 0.12s ease;
}

.sidebar .nav-item:hover {
  background: var(--v2-sidebar-hover);
  color: #fff;
}

.sidebar .nav-item.active {
  background: var(--v2-sidebar-active);
  color: #5eead4;
  box-shadow: inset 3px 0 0 var(--v2-brand);
}

.sidebar .nav-item__icon {
  display: inline-flex;
  width: 18px;
  height: 18px;
  flex-shrink: 0;
  color: inherit;
  opacity: 0.88;
}

.sidebar .nav-item__icon svg,
.sidebar .nav-item__emoji {
  width: 18px;
  height: 18px;
  opacity: 0.9;
}

.sidebar .nav-item:not(.active) {
  color: #e2e8f0;
}

.sidebar .nav-group--divided .nav-item:not(.active) {
  color: #cbd5e1;
  font-weight: 500;
}

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

.sidebar-footer {
  margin-top: auto;
  padding: 12px 14px 16px;
  border-top: 1px solid rgba(255, 255, 255, 0.06);
  color: var(--v2-sidebar-muted);
  font-size: 0.75rem;
  gap: 8px;
}

.sidebar-footer .status-dot {
  background: var(--v2-success);
  box-shadow: 0 0 0 3px rgba(5, 150, 105, 0.2);
}

.app.is-sidebar-collapsed .sidebar-brand-copy,
.app.is-sidebar-collapsed .sidebar .nav-item__label,
.app.is-sidebar-collapsed .sidebar .nav-group__label,
.app.is-sidebar-collapsed .sidebar .nav-section-label,
.app.is-sidebar-collapsed .sidebar-footer span:not(.status-dot) {
  display: none;
}

.app.is-sidebar-collapsed .sidebar .nav-item {
  justify-content: center;
  padding: 10px;
}

.app.is-sidebar-collapsed .sidebar-brand {
  justify-content: center;
}

.workspace {
  background: var(--v2-bg);
  min-width: 0;
}

.topbar {
  height: var(--v2-topbar-h);
  min-height: var(--v2-topbar-h);
  padding: 0 20px;
  background: rgba(255, 255, 255, 0.9);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--v2-border);
  box-shadow: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.topbar-title h1,
#viewTitle {
  margin: 0;
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--v2-text-secondary);
  letter-spacing: -0.01em;
}

.sidebar-toggle.icon-button {
  width: 36px;
  height: 36px;
  border-radius: var(--v2-radius-sm);
  border: 1px solid var(--v2-border);
  background: var(--v2-surface);
  color: var(--v2-text-secondary);
}

.user-menu__trigger {
  border: 1px solid var(--v2-border);
  background: var(--v2-surface);
  border-radius: 999px;
  min-height: 36px;
  padding: 4px 10px 4px 4px;
}

.user-menu__avatar {
  background: var(--v2-brand-soft);
  color: var(--v2-brand-ink);
  font-weight: 650;
}

.workspace > .view {
  padding: 16px 24px 28px;
}

.primary-button {
  min-height: var(--v2-control-h);
  border-radius: var(--v2-radius-sm);
  background: var(--v2-brand-strong);
  border-color: var(--v2-brand-strong);
  box-shadow: none;
  font-weight: 600;
}

.primary-button:hover {
  background: var(--v2-brand);
  border-color: var(--v2-brand);
}

.ghost-button {
  min-height: var(--v2-control-h);
  border-radius: var(--v2-radius-sm);
  border: 1px solid var(--v2-border);
  background: var(--v2-surface);
  color: var(--v2-text);
  box-shadow: none;
}

.badge {
  border-radius: 999px;
  font-size: var(--v2-type-meta);
  font-weight: 600;
  letter-spacing: 0.01em;
}

@media (max-width: 900px) {
  .app,
  .app.is-sidebar-collapsed {
    grid-template-columns: 1fr;
  }

  .sidebar {
    position: fixed;
    z-index: 40;
    inset: 0 auto 0 0;
    width: min(86vw, var(--v2-sidebar-w));
    transform: translateX(-105%);
    transition: transform 0.18s ease;
  }

  .app:not(.is-sidebar-collapsed) .sidebar,
  .app.is-mobile-nav-open .sidebar {
    transform: translateX(0);
  }

  .workspace > .view {
    padding: 16px 14px 88px;
  }

  .sidebar .nav-item,
  .sidebar-toggle.icon-button,
  .primary-button,
  .ghost-button {
    min-height: var(--v2-touch);
  }
}