/* 应用壳层视觉契约：统一分段控件、视图切换反馈、弹窗动作区和项目看板浮层；不改变领域状态机或数据口径。 */
.tabs {
  display: inline-flex;
  flex-wrap: wrap;
  align-items: stretch;
  gap: 3px;
  width: fit-content;
  max-width: 100%;
  margin: 12px 0 14px;
  padding: 3px;
  border: 1px solid var(--color-border);
  border-radius: 10px;
  background: var(--color-bg);
  box-shadow: inset 0 1px 2px rgba(20, 26, 38, 0.05);
}

.tabs .tab {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 7px;
  min-width: var(--segment-min-width, 88px);
  min-height: var(--control-height);
  padding: 0 14px;
  border: 0;
  border-radius: var(--radius-control);
  background: transparent;
  color: var(--color-muted);
  cursor: pointer;
  font: inherit;
  font-size: 13px;
  font-weight: 600;
  line-height: 1;
  white-space: nowrap;
  touch-action: manipulation;
  transition:
    background-color var(--motion-fast),
    color var(--motion-fast),
    box-shadow var(--motion-fast),
    transform 140ms var(--ease-out);
}

.tabs .tab:hover {
  background: rgba(255, 255, 255, 0.68);
  color: var(--color-ink);
}

.tabs .tab.active,
.tabs .tab[aria-selected="true"],
.tabs .tab[aria-pressed="true"] {
  background: var(--color-surface);
  color: var(--color-primary);
  box-shadow: var(--shadow-soft);
  font-weight: 700;
}

.tabs .tab:focus-visible {
  position: relative;
  z-index: 1;
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
  box-shadow: 0 0 0 4px var(--color-primary-soft);
}

.tabs .tab:active {
  transform: translateY(1px);
}

.tabs.settings-section-tabs,
.tabs.project-contact-tabs {
  margin: 12px 0 14px;
}

.tabs.ai-task-queue-tabs {
  margin: 0 0 var(--space-section);
}

.ai-task-queue-tabs .tab > span,
.experience-category-tabs .tab-count,
.project-contact-tabs .tab > strong {
  display: inline-grid;
  min-width: 22px;
  height: 20px;
  padding: 0 6px;
  place-items: center;
  border-radius: var(--radius-pill);
  background: rgba(100, 116, 139, 0.12);
  color: var(--color-muted);
  font-size: 11px;
  font-variant-numeric: tabular-nums;
  font-weight: 700;
}

.ai-task-queue-tabs .tab.active > span,
.experience-category-tabs .tab.active .tab-count,
.project-contact-tabs .tab.active > strong {
  background: var(--color-primary-soft);
  color: var(--color-primary);
}

.knowledge-search-tab {
  min-height: var(--control-height);
}

/* 页面只在路由或明确分段身份变化后进入；普通数据回写不会消费新的动画身份。 */
@keyframes route-view-in {
  from { opacity: 0; transform: translateY(6px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes segmented-panel-in {
  from { opacity: 0; transform: translateY(3px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes view-fade-in {
  from { opacity: 0; }
  to { opacity: 1; }
}

.main.route-view-enter > .page-shell {
  animation: route-view-in var(--motion-base) both;
}

.main.view-panel-enter .system-settings-panel,
.main.view-panel-enter .knowledge-page > .workspace:last-child,
.main.view-panel-enter #ai-task-queue-panel {
  animation: segmented-panel-in var(--motion-panel) both;
}

/* 共享弹窗正文把字段、说明和末尾动作区统一为同一 16px 节奏。 */
.modal-body > form {
  align-content: start;
  gap: var(--space-card);
}

.modal-body > form > :is(.toolbar, .form-actions):last-child {
  margin-top: 2px;
  padding-top: var(--space-card);
  border-top: 1px solid var(--color-border);
}

.overlay-close,
.project-board-panel-close {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: var(--control-height);
  padding: 0 10px;
  border-radius: var(--radius-control);
  touch-action: manipulation;
}

.overlay-close:hover,
.project-board-panel-close:hover {
  background: var(--color-surface-muted);
  color: var(--color-ink);
}

.overlay-close:focus-visible,
.project-board-panel-close:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}

/* 项目看板全屏浮层在内容区内提供显式关闭路径，桌面端也保留可发现性。 */
.project-board-floating-panel-head {
  position: sticky;
  top: 0;
  z-index: 2;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  min-height: 48px;
  margin: -2px -2px 12px;
  padding: 4px 8px 10px;
  border-bottom: 1px solid var(--color-border);
  background: var(--color-surface);
}

.project-board-floating-panel-head > strong {
  color: var(--color-ink);
  font-size: var(--font-size-title);
}

@media (max-width: 900px) {
  .tabs {
    flex-wrap: nowrap;
    width: 100%;
    overflow-x: auto;
    overscroll-behavior-x: contain;
    scrollbar-width: none;
  }

  .tabs::-webkit-scrollbar {
    display: none;
  }

  .modal-body > form > :is(.toolbar, .form-actions):last-child {
    position: sticky;
    bottom: -14px;
    z-index: 2;
    margin: 0 -14px -14px;
    padding: 12px 14px max(12px, env(safe-area-inset-bottom));
    background: var(--color-surface);
  }

  .project-board-floating-panel-head {
    padding-top: max(8px, env(safe-area-inset-top));
  }
}

@media (pointer: coarse) {
  .tabs .tab,
  .overlay-close,
  .project-board-panel-close,
  .knowledge-search-tab-close {
    min-height: 44px;
  }

  .knowledge-search-tab-close {
    width: 44px;
    height: 44px;
    margin-left: 0;
  }
}

@media (prefers-reduced-motion: reduce) {
  .tabs .tab:active {
    transform: none;
  }

  .main.route-view-enter > .page-shell,
  .main.view-panel-enter .system-settings-panel,
  .main.view-panel-enter .knowledge-page > .workspace:last-child,
  .main.view-panel-enter #ai-task-queue-panel {
    animation: view-fade-in 140ms var(--ease-out) both;
  }
}