/* App shell: sidebar + workspace。 */


/* Auth gate: 默认隐藏主应用壳，避免未登录时先闪现菜单/顶栏。
   app.js 会在会话鉴权通过后移除 body.auth-gated。 */
body.auth-gated .app-shell,
body.auth-gated .skip-link {
  display: none;
}

.app-shell {
  display: grid;
  grid-template-columns: var(--sidebar-width) minmax(0, 1fr);
  min-height: 100vh;
}

/* === Sidebar === */
.sidebar {
  display: flex;
  flex-direction: column;
  gap: var(--sp-5);
  padding: var(--sp-5) var(--sp-4);
  border-right: 1px solid var(--color-border);
  background: var(--color-surface);
  position: sticky;
  top: 0;
  height: 100vh;
  overflow-y: auto;
}

.brand {
  display: flex;
  flex-direction: column;
  gap: var(--sp-1);
  padding-bottom: var(--sp-4);
  border-bottom: 1px solid var(--color-border);
}

.brand-mark {
  display: flex;
  align-items: center;
  gap: var(--sp-2);
  font-size: var(--fs-md);
  font-weight: var(--fw-semibold);
  color: var(--color-text);
}

.brand-mark-dot {
  width: 8px;
  height: 8px;
  border-radius: var(--radius-pill);
  background: var(--color-primary);
  box-shadow: 0 0 8px var(--color-primary);
}

.brand-subtitle {
  font-size: var(--fs-xs);
  color: var(--color-text-muted);
  letter-spacing: 0.04em;
}

.sidebar-group {
  display: flex;
  flex-direction: column;
  gap: var(--sp-1);
}

.sidebar-label {
  font-size: var(--fs-xs);
  font-weight: var(--fw-semibold);
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  padding: 0 var(--sp-2);
  margin-bottom: var(--sp-1);
}

.menu {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.menu-item {
  display: flex;
  align-items: center;
  gap: var(--sp-2);
  padding: var(--sp-2) var(--sp-3);
  border-radius: var(--radius-md);
  font-size: var(--fs-md);
  color: var(--color-text-soft);
  text-align: left;
  width: 100%;
  position: relative;
  transition: background var(--trans-fast), color var(--trans-fast), box-shadow var(--trans-fast);
}

.menu-item:focus-visible {
  outline: none;
  box-shadow: 0 0 0 3px var(--color-primary-soft);
}

.menu-item::before {
  content: "";
  position: absolute;
  left: 8px;
  top: 10px;
  bottom: 10px;
  width: 3px;
  border-radius: var(--radius-pill);
  background: transparent;
  transition: background var(--trans-fast);
}

.menu-item-icon {
  width: 32px;
  height: 32px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 10px;
  background: var(--color-surface-raised);
  color: var(--color-text-muted);
  border: 1px solid transparent;
  flex: 0 0 auto;
  transition: background var(--trans-fast), color var(--trans-fast), border-color var(--trans-fast);
}

.menu-item-icon svg {
  width: 18px;
  height: 18px;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.8;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.menu-item-label {
  flex: 1;
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.menu-item-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 22px;
  height: 22px;
  padding: 0 8px;
  border-radius: var(--radius-pill);
  font-size: var(--fs-xs);
  font-weight: var(--fw-semibold);
  line-height: 1;
  font-variant-numeric: tabular-nums;
  background: var(--color-surface-raised);
  color: var(--color-text-soft);
  border: 1px solid var(--color-border);
  flex: 0 0 auto;
}

.menu-item-badge.tone-primary {
  background: var(--color-primary-soft);
  color: var(--color-primary-hover);
  border-color: transparent;
}

.menu-item-badge.tone-success {
  background: var(--color-success-soft);
  color: var(--color-success);
  border-color: transparent;
}

.menu-item-badge.tone-warning {
  background: var(--color-warning-soft);
  color: var(--color-warning);
  border-color: transparent;
}

.menu-item-badge.tone-danger {
  background: var(--color-danger-soft);
  color: var(--color-danger);
  border-color: transparent;
}

.menu-item:hover {
  background: var(--color-surface-hover);
  color: var(--color-text);
}

.menu-item:hover .menu-item-icon {
  color: var(--color-primary-hover);
  border-color: rgba(59, 130, 246, 0.12);
}

.menu-item:disabled,
.menu-item-disabled {
  cursor: not-allowed;
  opacity: 0.62;
}

.menu-item:disabled:hover,
.menu-item-disabled:hover {
  background: transparent;
  color: var(--color-text-soft);
}

.menu-item:disabled:hover .menu-item-icon,
.menu-item-disabled:hover .menu-item-icon {
  color: var(--color-text-muted);
  border-color: transparent;
}

.menu-item.active {
  background: var(--color-primary-soft);
  color: var(--color-primary-hover);
  font-weight: var(--fw-medium);
}

.menu-item.active::before {
  background: var(--color-primary);
}

.menu-item.active .menu-item-icon {
  background: rgba(255, 255, 255, 0.9);
  color: var(--color-primary-hover);
  border-color: rgba(59, 130, 246, 0.18);
}

.sidebar-footer {
  margin-top: auto;
  padding-top: var(--sp-4);
  border-top: 1px solid var(--color-border);
  font-size: var(--fs-xs);
  color: var(--color-text-muted);
  line-height: var(--lh-loose);
}

/* === Workspace === */
.workspace {
  display: flex;
  flex-direction: column;
  min-width: 0;
  min-height: 100vh;
}

.topbar {
  padding: var(--sp-4) var(--sp-6);
  border-bottom: 1px solid var(--color-border);
  background: var(--color-surface);
  position: sticky;
  top: 0;
  z-index: 10;
  box-shadow: var(--shadow-sm);
}

.topbar-main {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: var(--sp-4);
  flex-wrap: wrap;
  min-height: calc(var(--topbar-height) - var(--sp-2));
}

.topbar-title {
  display: flex;
  flex-direction: column;
  gap: 2px;
  min-width: 0;
  flex: 1 1 320px;
  max-width: 640px;
}


.page-context {
  color: var(--color-text-muted);
  font-size: var(--fs-xs);
  font-weight: var(--fw-semibold);
  letter-spacing: 0.04em;
}

.topbar-title h2 {
  font-size: var(--fs-lg);
  font-weight: var(--fw-semibold);
}

.topbar-title .subtitle {
  font-size: var(--fs-sm);
  color: var(--color-text-muted);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.topbar-right {
  margin-left: auto;
  min-width: min(100%, 680px);
  flex: 1 1 480px;
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: var(--sp-3);
}

.topbar-status-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--sp-3);
  width: 100%;
  flex-wrap: wrap;
}

.topbar-primary-actions {
  display: flex;
  align-items: center;
  gap: var(--sp-2);
  flex-wrap: wrap;
  justify-content: flex-end;
}

.topbar-status-row .status-banner {
  flex: 1 1 320px;
  min-width: min(320px, 100%);
  white-space: normal;
}

.topbar-tools-row {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: var(--sp-2);
  width: 100%;
  flex-wrap: wrap;
}

.topbar-search {
  width: min(320px, 100%);
  min-width: min(240px, 100%);
}

.topbar-search input {
  background: var(--color-surface-raised);
}

.topbar-user {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  flex-wrap: wrap;
  gap: var(--sp-2);
  padding: var(--sp-1) var(--sp-3);
  border-left: 1px solid var(--color-border);
  font-size: var(--fs-sm);
  color: var(--color-text-soft);
  min-height: 36px;
  min-width: 0;
}

.topbar-user strong {
  font-weight: var(--fw-semibold);
  color: var(--color-text);
  overflow-wrap: anywhere;
  word-break: break-word;
}

.workspace-body {
  flex: 1;
  padding: var(--sp-6);
  width: 100%;
  min-width: 0;
}

.view {
  display: none;
  flex-direction: column;
  gap: var(--sp-4);
}

.view.active {
  display: flex;
}

/* 响应式降级 */
@media (max-width: 1024px) {
  :root {
    --sidebar-width: 200px;
  }

  .topbar-search {
    min-width: 180px;
  }

  .topbar-right {
    min-width: 100%;
  }
}

@media (max-width: 768px) {
  .app-shell {
    grid-template-columns: 1fr;
  }
  .sidebar {
    position: static;
    height: auto;
  }

  .topbar {
    padding: var(--sp-4);
  }

  .topbar-tools-row,
  .topbar-primary-actions,
  .topbar-user {
    justify-content: flex-start;
  }

  .topbar-right {
    align-items: stretch;
  }

  .topbar-user {
    width: 100%;
    border-left: 0;
    padding-left: 0;
  }

  .topbar-search {
    width: 100%;
  }

  .workspace-body {
    padding: var(--sp-4);
  }
}