/* -------------------------------------------------------------------------
   4. Sidebar — Collapsible
   ------------------------------------------------------------------------- */
.sidebar {
  position: fixed;
  top: 0;
  left: 0;
  bottom: 0;
  width: var(--sidebar-width);
  background: var(--color-surface);
  border-right: 1px solid var(--color-border-soft);
  display: flex;
  flex-direction: column;
  z-index: 100;
  overflow-y: auto;
  overflow-x: hidden;
  transition: width var(--transition-sidebar), transform var(--transition-sidebar), visibility var(--transition-sidebar);
}

/* Desktop only collapse behavior */
@media (min-width: 901px) {
  .app-shell.sidebar-collapsed .sidebar {
    width: var(--sidebar-collapsed-width);
    visibility: visible;
    transform: none;
    border-right: 1px solid var(--color-border-soft);
  }
}

/* Collapse toggle button */
.sidebar-collapse-btn {
  background: var(--color-neutral-soft);
  color: var(--color-text-secondary);
  border: none;
  border-radius: 8px;
  width: 28px;
  height: 28px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  z-index: 10;
  transition: all var(--transition);
}

.sidebar-collapse-btn:hover {
  background: var(--color-border);
  color: var(--color-text);
  transform: scale(1.05);
}

.sidebar-collapse-btn svg {
  width: 14px;
  height: 14px;
  color: var(--color-text-muted);
  transition: transform var(--transition-sidebar);
}

/* Brand */
.sidebar-brand {
  padding: 14px 16px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid var(--color-border-soft);
  min-height: 64px;
}

.sidebar-brand-logo-title {
  display: flex;
  align-items: center;
  gap: 10px;
}

.sidebar-brand-icon {
  width: 36px;
  height: 36px;
  background: transparent;
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.sidebar-brand-icon svg {
  width: 18px;
  height: 18px;
  color: #fff;
}

.sidebar-brand-text {
  font-size: 15px;
  font-weight: 700;
  color: var(--color-text);
  letter-spacing: -0.02em;
  white-space: nowrap;
  overflow: hidden;
  opacity: 1;
  transition: opacity var(--transition-sidebar);
}

.app-shell.sidebar-collapsed .sidebar-brand {
  padding: 14px 0;
  justify-content: center;
}

.app-shell.sidebar-collapsed .sidebar-brand-logo-title {
  justify-content: center;
}

.app-shell.sidebar-collapsed .sidebar-brand-text {
  display: none;
}

.app-shell.sidebar-collapsed .sidebar-collapse-btn {
  display: none;
}

/* Navigation */
.sidebar-nav {
  flex: 1;
  padding: 12px 8px;
}

.sidebar-section-label {
  font-size: 10px;
  font-weight: 600;
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  padding: 8px 12px 4px;
  margin-top: 8px;
  white-space: nowrap;
  overflow: hidden;
  opacity: 1;
  transition: opacity var(--transition-sidebar);
}

.app-shell.sidebar-collapsed .sidebar-section-label {
  display: none;
}

.sidebar-link {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 9px 12px;
  border-radius: 8px;
  font-size: 13px;
  font-weight: 500;
  color: var(--color-text-secondary);
  transition: background var(--transition), color var(--transition);
  text-decoration: none;
  margin-bottom: 2px;
  white-space: nowrap;
  overflow: hidden;
}

.sidebar-link:hover {
  background: var(--color-neutral-soft);
  color: var(--color-text);
  text-decoration: none;
}

.sidebar-link.active {
  background: var(--color-primary-soft);
  color: var(--color-primary);
  font-weight: 600;
}

.sidebar-link svg {
  width: 18px;
  height: 18px;
  color: var(--color-neutral);
  flex-shrink: 0;
  transition: color var(--transition);
}

.sidebar-link.active svg {
  color: var(--color-primary);
}

.app-shell.sidebar-collapsed .sidebar-link {
  justify-content: center;
  padding: 12px;
}

.app-shell.sidebar-collapsed .sidebar-link span {
  display: none;
}

/* Footer */
.sidebar-footer {
  padding: 12px 16px;
  border-top: 1px solid var(--color-border-soft);
  display: flex;
  flex-direction: column;
  gap: 4px;
  overflow: hidden;
}

.sidebar-footer-version {
  font-size: 11px;
  color: var(--color-text-muted);
  white-space: nowrap;
}

.sidebar-footer-status {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 11px;
  color: var(--color-success);
  white-space: nowrap;
}

.sidebar-footer-status .dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--color-success);
  animation: pulse-dot 2s infinite;
  flex-shrink: 0;
}

@keyframes pulse-dot {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.4; }
}

.sidebar-footer-copy {
  font-size: 10px;
  color: var(--color-text-muted);
  margin-top: 2px;
  white-space: nowrap;
}

.app-shell.sidebar-collapsed .sidebar-footer {
  padding: 12px 0;
  align-items: center;
}

.app-shell.sidebar-collapsed .sidebar-footer-status {
  justify-content: center;
  gap: 0;
}

.app-shell.sidebar-collapsed .sidebar-footer-status .status-text {
  display: none;
}

.app-shell.sidebar-collapsed .sidebar-footer-version,
.app-shell.sidebar-collapsed .sidebar-footer-copy {
  display: none;
}

/* -------------------------------------------------------------------------
   5. Header
   ------------------------------------------------------------------------- */
.topbar {
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border-soft);
  padding: 16px 28px 14px;
}

.topbar-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 20px;
}

.topbar-title-group {
  flex: 1;
}

.topbar-title {
  font-size: 20px;
  font-weight: 700;
  color: var(--color-text);
  letter-spacing: -0.02em;
  line-height: 1.2;
}

.topbar-subtitle {
  font-size: 13px;
  color: var(--color-text-secondary);
  margin-top: 3px;
  max-width: 560px;
}

.topbar-actions {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-shrink: 0;
}

/* Project Context Strip — second row inside topbar */
.project-context-strip {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-top: 12px;
  padding-top: 10px;
  border-top: 1px solid var(--color-border-soft);
}

.project-context-label {
  display: flex;
  align-items: center;
  gap: 5px;
  font-size: 12px;
  font-weight: 600;
  color: var(--color-text-muted);
  white-space: nowrap;
}

.project-context-label svg {
  color: var(--color-text-muted);
  flex-shrink: 0;
}

.project-context-strip .form-select {
  min-width: 180px;
  font-weight: 600;
  font-size: 12px;
}

/* -------------------------------------------------------------------------
   6. Status Strip
   ------------------------------------------------------------------------- */
.status-strip {
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border-soft);
  padding: 0 28px;
  height: var(--status-strip-height);
  display: flex;
  align-items: center;
  gap: 20px;
  overflow-x: auto;
}

.status-item {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 12px;
  white-space: nowrap;
}

.status-label {
  color: var(--color-text-muted);
  font-weight: 500;
}

.status-value {
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: 4px;
}

.status-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
}

.status-dot.green { background: var(--color-success); }
.status-dot.amber { background: var(--color-warning); }
.status-dot.red { background: var(--color-danger); }
.status-dot.gray { background: var(--color-neutral); }

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

.status-spacer { flex: 1; }

.status-updated {
  font-size: 11px;
  color: var(--color-text-muted);
}