/**
 * 顶栏布局：固定定位、主工具横向滚动、同步状态指示灯。
 * 与 design-tokens / ui-theme 配合；加载于 global.css 之后。
 */

nav.notepad-navbar.notepad-navbar--fixed {
  position: fixed !important;
  top: 0 !important;
  left: 0 !important;
  right: 0 !important;
  z-index: 1030;
  width: 100%;
  max-width: 100%;
  margin: 0 !important;
  box-sizing: border-box;
  min-height: var(--navbar-height) !important;
  display: flex !important;
  align-items: center !important;
  /* 顶栏内下拉：与 --navbar-surface 同系，随 body.dark 令牌自动变体 */
  --nav-dropdown-bg: color-mix(in srgb, var(--navbar-surface) 76%, var(--navbar-fg) 24%);
  --nav-dropdown-border: color-mix(in srgb, var(--navbar-surface-border) 45%, var(--navbar-fg-muted) 55%);
  --nav-dropdown-shadow: 0 12px 36px rgba(0, 0, 0, 0.28), 0 0 0 1px rgba(255, 255, 255, 0.06);
  --nav-dropdown-item-hover-bg: rgba(255, 255, 255, 0.1);
  --nav-dropdown-item-active-bg: rgba(255, 255, 255, 0.14);
  --nav-dropdown-focus-ring: inset 0 0 0 2px rgba(145, 206, 255, 0.55);
  --nav-dropdown-panel-py: var(--space-1);
  --nav-dropdown-panel-inset: var(--space-2);
  --nav-dropdown-item-py: 6px;
  --nav-dropdown-item-px: var(--space-3);
  --nav-dropdown-row-gap: 0;
}

body.dark nav.notepad-navbar.notepad-navbar--fixed {
  --nav-dropdown-shadow: 0 16px 44px rgba(0, 0, 0, 0.5), 0 0 0 1px rgba(255, 255, 255, 0.05);
}

.notepad-navbar__inner.container-fluid {
  width: 100%;
  max-width: 100%;
  flex: 1 1 auto;
  margin-left: 0;
  margin-right: 0;
  padding-left: var(--page-inline-padding);
  padding-right: var(--page-inline-padding-end);
  box-sizing: border-box;
  display: flex;
  align-items: center;
  min-height: var(--navbar-height);
}

.notepad-navbar.notepad-navbar--fixed .notepad-navbar__header {
  float: none;
  display: flex;
  flex-wrap: nowrap;
  align-items: center;
  justify-content: flex-start;
  width: 100%;
  min-width: 0;
  min-height: var(--navbar-height) !important;
  max-height: var(--navbar-height) !important;
  height: var(--navbar-height) !important;
  padding-left: 0;
  padding-right: 0;
  box-sizing: border-box;
  column-gap: var(--notepad-navbar-gap, var(--navbar-toolbar-gap, var(--space-3)));
  row-gap: 4px;
}

.notepad-navbar__brand {
  display: inline-flex;
  align-items: center;
  font-weight: 700;
  font-size: var(--font-size-ui);
  letter-spacing: 0.06em;
  color: var(--brand-heading-color);
  flex-shrink: 0;
  transition: color var(--t-fast) var(--ease-ui), text-shadow var(--t-fast) var(--ease-ui);
  text-shadow: none;
}

.notepad-navbar__brand:hover {
  color: var(--navbar-fg);
  text-shadow: 0 0 12px rgba(145, 206, 255, 0.35);
}

/* 无独立图标时用字符（如新标签打开分享页） */
.notepad-navbar__icon-btn.notepad-navbar__glyph-btn {
  font-weight: 600;
  font-size: 1.05rem;
  line-height: 1;
  min-width: 36px;
  min-height: 32px;
  padding-left: 0.35rem;
  padding-right: 0.35rem;
}

/* 顶栏同步状态：仅指示灯，文案在 title / aria-label（见 note-cloud-sync.js） */
.notepad-navbar__save {
  flex: 0 0 auto;
  display: flex;
  align-items: center;
  justify-content: center;
  min-width: 0;
}

.navbar-save-status.note-save-status.note-save-status--indicator {
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 14px;
  height: 14px;
  padding: 0;
  margin: 0;
  flex-shrink: 0;
  font-size: 0;
  line-height: 0;
  color: transparent;
  overflow: visible;
}

.navbar-save-status.note-save-status.note-save-status--indicator::before {
  content: '';
  display: block;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--navbar-fg-muted);
  box-shadow: 0 0 0 2px rgba(15, 23, 42, 0.12);
  flex-shrink: 0;
}

.dark .navbar-save-status.note-save-status.note-save-status--indicator::before {
  box-shadow: 0 0 0 2px rgba(255, 255, 255, 0.16);
}

.navbar-save-status.note-save-status.note-save-status--indicator[data-state='idle']::before,
.navbar-save-status.note-save-status.note-save-status--indicator:not([data-state])::before {
  background: var(--navbar-fg-muted);
  opacity: 0.92;
}

.navbar-save-status.note-save-status.note-save-status--indicator[data-state='saving']::before {
  background: #f0c14b;
  box-shadow: 0 0 0 2px rgba(240, 193, 75, 0.35);
  animation: notepad-sync-pulse 1.1s ease-in-out infinite;
}

.navbar-save-status.note-save-status.note-save-status--indicator[data-state='saved']::before {
  background: #5ad98a;
  box-shadow: 0 0 0 2px rgba(90, 217, 138, 0.28);
}

.navbar-save-status.note-save-status.note-save-status--indicator[data-state='offline']::before {
  background: #9aa3b2;
}

.navbar-save-status.note-save-status.note-save-status--indicator[data-state='error']::before,
.navbar-save-status.note-save-status.note-save-status--indicator[data-state='load_error']::before {
  background: #f87171;
  box-shadow: 0 0 0 2px rgba(248, 113, 113, 0.35);
}

.navbar-save-status.note-save-status.note-save-status--indicator[data-state='conflict']::before {
  background: #fbbf24;
  box-shadow: 0 0 0 2px rgba(251, 191, 36, 0.35);
}

@keyframes notepad-sync-pulse {
  0%,
  100% {
    transform: scale(1);
    opacity: 1;
  }
  50% {
    transform: scale(0.88);
    opacity: 0.72;
  }
}

@media (prefers-reduced-motion: reduce) {
  .navbar-save-status.note-save-status.note-save-status--indicator[data-state='saving']::before {
    animation: none;
  }
}

/* 主工具区：可横向滚动 + snap */
.notepad-navbar__toolbar-wrap {
  display: flex;
  flex: 1 1 auto;
  align-items: center;
  justify-content: flex-end;
  min-width: 0;
  gap: var(--space-1);
}

.notepad-navbar__tools-scroll {
  display: flex;
  flex-wrap: nowrap;
  align-items: center;
  gap: var(--notepad-navbar-gap, var(--navbar-toolbar-gap, var(--space-3)));
  flex: 1 1 auto;
  min-width: 0;
  max-height: var(--navbar-height);
  line-height: 0;
  overflow-x: auto;
  overflow-y: hidden;
  -webkit-overflow-scrolling: touch;
  scroll-snap-type: x proximity;
  scrollbar-width: thin;
  padding-bottom: 1px;
}

.notepad-navbar__tools-scroll > .notepad-navbar__tool {
  scroll-snap-align: start;
  flex: 0 0 auto;
  display: flex;
  align-items: center;
  line-height: 0;
}

/* iA Writer 风格：主工具栏只保留高频动作，其余收纳到“更多” */
.notepad-navbar__tools-scroll > .notepad-navbar__tool.notepad-navbar__tool--secondary {
  display: none !important;
}

/* “更多”在桌面也可用（默认存在于 DOM），避免功能只在移动端可达 */
.notepad-navbar__more-wrap {
  flex: 0 0 auto;
  display: flex;
  align-items: center;
}

.notepad-navbar__tools-scroll .notepad-navbar__tool > a,
.notepad-navbar__tools-scroll .notepad-navbar__tool > .notepad-navbar__icon-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0;
  margin: 0;
  min-height: 0;
  box-sizing: border-box;
  border: none;
  background: transparent;
  cursor: pointer;
  -webkit-appearance: none;
  appearance: none;
  font: inherit;
  color: var(--navbar-fg);
  text-decoration: none;
}

.notepad-navbar__tools-scroll .notepad-navbar__tool > .notepad-navbar__icon-btn:focus-visible {
  outline: 2px solid rgba(145, 206, 255, 0.85);
  outline-offset: 2px;
}

.notepad-navbar__tools-scroll img {
  display: block;
  width: 20px;
  height: 20px;
  object-fit: contain;
  flex-shrink: 0;
}

/* 窄屏：环境音 / 计时器 / 画中画 收入右侧「更多」 */
.notepad-navbar__more-wrap--mobile-only {
  display: none;
  align-items: center;
  flex: 0 0 auto;
  position: relative;
}

/* 与 .tools-scroll .tool > .icon-btn 一致：更多键不在 .notepad-navbar__tool 内，需单独重置浏览器默认 button 样式 */
.notepad-navbar__more-wrap--mobile-only > .notepad-navbar__icon-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0;
  margin: 0;
  min-width: 36px;
  min-height: 32px;
  box-sizing: border-box;
  border: none;
  background: transparent;
  box-shadow: none;
  cursor: pointer;
  -webkit-appearance: none;
  appearance: none;
  font: inherit;
  color: var(--navbar-fg);
  text-decoration: none;
}

.notepad-navbar__more-wrap--mobile-only > .notepad-navbar__icon-btn img {
  display: block;
  width: 20px;
  height: 20px;
  object-fit: contain;
  flex-shrink: 0;
}

/* iA Writer 风格：更多菜单在桌面也显示（沿用 mobile-only 的按钮重置样式） */
.notepad-navbar__more-wrap {
  align-items: center;
  flex: 0 0 auto;
  position: relative;
}

.notepad-navbar__more-wrap > .notepad-navbar__icon-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0;
  margin: 0;
  min-width: 36px;
  min-height: 32px;
  box-sizing: border-box;
  border: none;
  background: transparent;
  box-shadow: none;
  cursor: pointer;
  -webkit-appearance: none;
  appearance: none;
  font: inherit;
  color: var(--navbar-fg);
  text-decoration: none;
}

.notepad-navbar__more-wrap > .notepad-navbar__icon-btn img {
  display: block;
  width: 20px;
  height: 20px;
  object-fit: contain;
  flex-shrink: 0;
}

/* 顶栏内下拉（下载格式 / 更多）：与导航条同主题、统一间距与左对齐 */
.notepad-navbar__dropdown-panel.dropdown-menu {
  top: auto;
  min-width: 0;
  width: max-content;
  max-width: min(22rem, calc(100vw - var(--page-inline-padding) - var(--page-inline-padding-end) - var(--space-4)));
  margin: 0;
  padding: var(--nav-dropdown-panel-py) var(--nav-dropdown-panel-inset);
  list-style: none;
  border-radius: var(--radius-md);
  background: var(--nav-dropdown-bg);
  border: 1px solid var(--nav-dropdown-border);
  box-shadow: var(--nav-dropdown-shadow);
  box-sizing: border-box;
}

.notepad-navbar__dropdown-panel > li {
  margin: 0;
  padding: 0;
}

.notepad-navbar__dropdown-panel a.dropdown-item,
.notepad-navbar__dropdown-panel button.dropdown-item {
  display: flex;
  align-items: center;
  justify-content: flex-start;
  width: 100%;
  box-sizing: border-box;
  text-align: left;
  border: 0;
  border-radius: var(--radius-sm);
  background: transparent;
  color: var(--navbar-fg);
  font: inherit;
  font-size: var(--font-size-sm);
  font-weight: 500;
  line-height: var(--leading-snug);
  letter-spacing: 0.01em;
  padding: var(--nav-dropdown-item-py) var(--nav-dropdown-item-px);
  min-height: 0;
  cursor: pointer;
  text-decoration: none;
  gap: var(--space-2);
  transition: background-color var(--t-fast) var(--ease-ui), color var(--t-fast) var(--ease-ui);
}

.notepad-navbar__dropdown-panel a.dropdown-item:hover,
.notepad-navbar__dropdown-panel a.dropdown-item:focus,
.notepad-navbar__dropdown-panel button.dropdown-item:hover,
.notepad-navbar__dropdown-panel button.dropdown-item:focus {
  background: var(--nav-dropdown-item-hover-bg);
  color: var(--navbar-fg);
  outline: none;
}

.notepad-navbar__dropdown-panel a.dropdown-item:active,
.notepad-navbar__dropdown-panel button.dropdown-item:active {
  background: var(--nav-dropdown-item-active-bg);
}

.notepad-navbar__dropdown-panel a.dropdown-item:focus-visible,
.notepad-navbar__dropdown-panel button.dropdown-item:focus-visible {
  box-shadow: var(--nav-dropdown-focus-ring);
}

/* 下载菜单：editor.js 展开时为 position:fixed */
#iconDropdown.notepad-navbar__dropdown-panel.notepad-navbar__download-menu.dropdown-menu {
  display: none;
}

#iconDropdown.notepad-navbar__dropdown-panel.notepad-navbar__download-menu.dropdown-menu.show {
  display: flex;
  flex-direction: column;
  gap: var(--nav-dropdown-row-gap);
}

/* 「更多」：贴按钮右下，与下载菜单共用面板变量 */
#navbarMoreMenu.notepad-navbar__dropdown-panel.navbar-more-dropdown {
  display: none;
  position: absolute;
  top: calc(100% + 6px);
  right: 0;
  left: auto;
  z-index: 950;
}

#navbarMoreMenu.notepad-navbar__dropdown-panel.navbar-more-dropdown.show {
  display: flex;
  flex-direction: column;
  gap: var(--nav-dropdown-row-gap);
}

@media (max-width: 768px) {
  .notepad-navbar__tools-scroll {
    overflow-x: visible;
    scrollbar-width: none;
    gap: var(--space-2);
  }

  .notepad-navbar__tools-scroll::-webkit-scrollbar {
    display: none;
  }

  .notepad-navbar__tool--mobile-collapsed {
    display: none !important;
  }

  .notepad-navbar__tools-scroll > .notepad-navbar__tool {
    flex: 0 0 auto;
  }

  .notepad-navbar__tools-scroll .notepad-navbar__tool > .notepad-navbar__icon-btn,
  .notepad-navbar__more-wrap--mobile-only > .notepad-navbar__icon-btn {
    min-width: 40px;
    min-height: 40px;
  }

  .notepad-navbar__more-wrap--mobile-only {
    display: flex !important;
  }
}