:root {
  --header-height: 56px;
  --sidebar-width: 288px;
  --content-max-width: 1160px;
  --bg: #f4f5f7;
  --surface: #ffffff;
  --surface-muted: #f7f7f8;
  --surface-hover: #f0f1f3;
  --text: #202124;
  --text-muted: #666a70;
  --border: #dfe1e5;
  --border-strong: #c7cacf;
  --accent: #991b1b;
  --accent-hover: #7f1515;
  --accent-soft: #fbeaea;
  --focus: #2563eb;
  --scrollbar-thumb: rgba(32, 33, 36, 0.26);
  --scrollbar-thumb-hover: rgba(32, 33, 36, 0.42);
  --scrollbar-track: transparent;
  --shadow-menu: 0 8px 22px rgba(24, 27, 31, 0.14);
  color-scheme: light;
  font-family: "Microsoft YaHei", "PingFang SC", "Noto Sans CJK SC", "Segoe UI", system-ui, sans-serif;
}

html[data-resolved-theme="dark"] {
  --bg: #111315;
  --surface: #17191c;
  --surface-muted: #1e2125;
  --surface-hover: #272b30;
  --text: #e8e9eb;
  --text-muted: #a8adb4;
  --border: #34383e;
  --border-strong: #4a5058;
  --accent: #d35b5b;
  --accent-hover: #e47878;
  --accent-soft: #3a2022;
  --focus: #72a7ff;
  --scrollbar-thumb: rgba(232, 233, 235, 0.3);
  --scrollbar-thumb-hover: rgba(232, 233, 235, 0.48);
  --scrollbar-track: transparent;
  --shadow-menu: 0 10px 26px rgba(0, 0, 0, 0.34);
  color-scheme: dark;
}

html,
body,
* {
  scrollbar-color: var(--scrollbar-thumb) var(--scrollbar-track);
  scrollbar-width: thin;
}

*::-webkit-scrollbar {
  width: 6px;
  height: 6px;
}

*::-webkit-scrollbar-track {
  background: var(--scrollbar-track);
}

*::-webkit-scrollbar-button {
  display: none;
  width: 0;
  height: 0;
}

*::-webkit-scrollbar-thumb {
  min-height: 24px;
  background: var(--scrollbar-thumb);
  border: 1px solid transparent;
  border-radius: 999px;
  background-clip: padding-box;
}

*::-webkit-scrollbar-thumb:hover {
  background: var(--scrollbar-thumb-hover);
}

*::-webkit-scrollbar-corner {
  background: transparent;
}

* {
  box-sizing: border-box;
}

html,
body {
  width: 100%;
  min-width: 0;
  height: 100%;
  margin: 0;
  overflow: hidden;
}

body {
  background: var(--bg);
  color: var(--text);
  font-size: 14px;
}

button,
input,
select {
  font: inherit;
}

button,
a,
input,
select,
[tabindex] {
  -webkit-tap-highlight-color: transparent;
}

button:focus-visible,
a:focus-visible,
input:focus-visible,
select:focus-visible,
[tabindex]:focus-visible {
  outline: 2px solid var(--focus);
  outline-offset: 2px;
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.icon {
  width: 19px;
  height: 19px;
  flex: 0 0 auto;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.8;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.mobile-action-label {
  display: none;
  font-size: 12px;
  line-height: 1;
  white-space: nowrap;
}

.app-header {
  position: relative;
  z-index: 60;
  display: grid;
  grid-template-columns: var(--sidebar-width) minmax(220px, 680px) minmax(max-content, 1fr);
  align-items: center;
  gap: 16px;
  height: calc(var(--header-height) + env(safe-area-inset-top));
  padding: env(safe-area-inset-top) 12px 0 0;
  background: var(--surface);
  border-bottom: 1px solid var(--border);
}

.brand {
  align-self: stretch;
  display: flex;
  align-items: center;
  min-width: 0;
  padding: 0 18px 0 52px;
  color: #ffffff;
  background: #8f1717;
  text-decoration: none;
}

.brand-title {
  min-width: 0;
  overflow: hidden;
  font-size: 18px;
  font-weight: 700;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.brand-version {
  margin-left: 10px;
  color: rgba(255, 255, 255, 0.76);
  font-size: 11px;
  white-space: nowrap;
}

.icon-button.sidebar-toggle {
  position: absolute;
  left: 10px;
  top: calc(env(safe-area-inset-top) + 8px);
  z-index: 2;
  color: #ffffff;
  background: rgba(255, 255, 255, 0.1);
  border-color: rgba(255, 255, 255, 0.38);
}

.icon-button.sidebar-toggle:hover {
  color: #ffffff;
  background: rgba(255, 255, 255, 0.18);
  border-color: rgba(255, 255, 255, 0.55);
}

.icon-menu {
  display: none;
}

.global-search {
  position: relative;
  justify-self: center;
  display: grid;
  grid-template-columns: 20px minmax(0, 1fr) auto;
  align-items: center;
  gap: 9px;
  width: min(100%, 680px);
  height: 36px;
  padding: 0 8px 0 11px;
  color: var(--text-muted);
  background: var(--surface-muted);
  border: 1px solid var(--border);
  border-radius: 7px;
}

.global-search-help {
  position: absolute;
  top: calc(100% + 8px);
  right: 0;
  left: 0;
  z-index: 80;
  display: none;
  padding: 10px 12px;
  color: var(--text);
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 7px;
  box-shadow: var(--shadow-menu);
  font-size: 12px;
  line-height: 1.6;
}

.global-search-help strong {
  color: var(--accent);
}

.global-search-help code {
  padding: 1px 4px;
  color: var(--accent);
  background: var(--accent-soft);
  border-radius: 4px;
}

.global-search:focus-within .global-search-help {
  display: block;
}

.global-search:focus-within {
  background: var(--surface);
  border-color: var(--focus);
  box-shadow: 0 0 0 2px color-mix(in srgb, var(--focus) 18%, transparent);
}

.global-search input {
  min-width: 0;
  height: 100%;
  padding: 0;
  color: var(--text);
  background: transparent;
  border: 0;
  outline: 0;
}

.global-search input::placeholder {
  color: var(--text-muted);
}

.global-search kbd {
  padding: 2px 6px;
  color: var(--text-muted);
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 4px;
  font-family: inherit;
  font-size: 10px;
  white-space: nowrap;
}

.header-actions {
  justify-self: end;
  display: flex;
  align-items: center;
  gap: 4px;
  min-width: 0;
}

.icon-button,
.text-button,
.command-button,
.sidebar-collapse,
.sidebar-restore,
.sidebar-tabs button,
.sidebar-view-label button,
.more-menu button {
  color: inherit;
  background: transparent;
  border: 1px solid transparent;
  cursor: pointer;
}

.icon-button {
  display: inline-grid;
  place-items: center;
  width: 38px;
  height: 38px;
  padding: 0;
  border-radius: 6px;
}

.icon-button:hover,
.text-button:hover,
.command-button:hover,
.more-menu button:hover {
  background: var(--surface-hover);
}

.font-controls {
  display: flex;
  align-items: center;
  gap: 1px;
  height: 38px;
  color: var(--text-muted);
}

.tool-label {
  margin-right: 3px;
  font-size: 12px;
}

.text-button {
  width: 30px;
  height: 32px;
  padding: 0;
  border-radius: 5px;
  color: var(--accent);
  font-family: Georgia, serif;
  font-size: 14px;
}

.text-button-large {
  font-size: 18px;
}

.command-button {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  height: 38px;
  padding: 0 9px;
  border-radius: 6px;
}

.theme-button .theme-icon-light,
.theme-button .theme-icon-dark,
.theme-button .theme-icon-system {
  display: none;
}

html[data-theme="system"] .theme-icon-system,
html[data-theme="light"] .theme-icon-light,
html[data-theme="dark"] .theme-icon-dark {
  display: block;
}

.mobile-search-button {
  display: none;
}

.more-menu {
  position: absolute;
  top: calc(100% + 6px);
  right: 10px;
  z-index: 70;
  width: 248px;
  padding: 12px;
  color: var(--text);
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 8px;
  box-shadow: var(--shadow-menu);
}

.more-menu[hidden] {
  display: none;
}

.more-menu > label {
  display: block;
  margin-bottom: 6px;
  color: var(--text-muted);
  font-size: 12px;
}

.more-menu select {
  width: 100%;
  height: 34px;
  padding: 0 8px;
  color: var(--text);
  background: var(--surface-muted);
  border: 1px solid var(--border);
  border-radius: 6px;
}

.menu-font-row {
  display: grid;
  grid-template-columns: 1fr auto 34px 34px;
  align-items: center;
  gap: 4px;
  min-height: 46px;
  margin-top: 8px;
  border-top: 1px solid var(--border);
}

.menu-font-row output {
  color: var(--text-muted);
  font-size: 12px;
}

.menu-font-row button {
  height: 30px;
  padding: 0;
  border-radius: 5px;
}

.menu-command {
  display: flex;
  align-items: center;
  gap: 8px;
  width: 100%;
  height: 36px;
  padding: 0 8px;
  border-top: 1px solid var(--border);
  border-radius: 5px;
}

.app-layout {
  position: relative;
  display: grid;
  grid-template-columns: var(--sidebar-width) 5px minmax(0, 1fr);
  width: 100%;
  height: calc(100dvh - var(--header-height) - env(safe-area-inset-top));
  min-height: 0;
  transition: grid-template-columns 160ms ease;
}

.sidebar {
  grid-column: 1;
  display: flex;
  flex-direction: column;
  min-width: 0;
  min-height: 0;
  overflow: hidden;
  background: var(--surface);
  border-right: 1px solid var(--border);
  opacity: 1;
  transition: opacity 120ms ease;
}

.sidebar-tabs {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  flex: 0 0 48px;
  border-bottom: 1px solid var(--border);
}

body.search-view .sidebar-tabs {
  display: none;
}

.sidebar-tabs button {
  position: relative;
  min-width: 0;
  padding: 0 8px;
  border-radius: 0;
  color: var(--text-muted);
}

.sidebar-tabs button:hover {
  color: var(--text);
  background: var(--surface-hover);
}

.sidebar-tabs button[aria-selected="true"] {
  color: var(--accent);
  font-weight: 600;
}

.sidebar-tabs button[aria-selected="true"]::after {
  position: absolute;
  right: 14px;
  bottom: -1px;
  left: 14px;
  height: 3px;
  background: var(--accent);
  content: "";
}

.sidebar-view-label {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex: 0 0 48px;
  padding: 0 12px 0 16px;
  color: var(--accent);
  border-bottom: 1px solid var(--border);
  font-weight: 600;
}

.sidebar-view-label[hidden] {
  display: none;
}

.sidebar-view-label button {
  padding: 5px 7px;
  color: var(--text-muted);
  border-radius: 5px;
  font-size: 12px;
}

.nav-frame,
#content {
  display: block;
  width: 100%;
  min-width: 0;
  height: 100%;
  min-height: 0;
  background: var(--surface);
  border: 0;
}

.nav-frame {
  flex: 1 1 auto;
}

.sidebar-collapse {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  flex: 0 0 44px;
  margin: 6px 10px calc(6px + env(safe-area-inset-bottom));
  border-color: var(--border);
  border-radius: 6px;
  color: var(--text-muted);
}

.sidebar-collapse:hover {
  color: var(--text);
  background: var(--surface-hover);
}

.sidebar-resizer {
  grid-column: 2;
  position: relative;
  z-index: 5;
  width: 5px;
  cursor: col-resize;
}

.sidebar-resizer::after {
  position: absolute;
  top: 0;
  bottom: 0;
  left: 2px;
  width: 1px;
  background: transparent;
  content: "";
}

.sidebar-resizer:hover::after,
.sidebar-resizer:focus-visible::after,
body.sidebar-resizing .sidebar-resizer::after {
  background: var(--accent);
}

.content-area {
  grid-column: 3;
  min-width: 0;
  min-height: 0;
  overflow: hidden;
  background: var(--bg);
}

.sidebar-restore {
  position: absolute;
  top: 12px;
  left: 10px;
  z-index: 10;
  display: none;
  place-items: center;
  width: 34px;
  height: 34px;
  padding: 0;
  color: var(--text-muted);
  background: color-mix(in srgb, var(--surface) 92%, transparent);
  border-color: var(--border);
  border-radius: 6px;
  box-shadow: 0 2px 8px rgba(24, 27, 31, 0.08);
}

body.sidebar-collapsed .app-layout {
  grid-template-columns: 0 0 minmax(0, 1fr);
}

body.sidebar-collapsed .sidebar {
  visibility: hidden;
  opacity: 0;
}

body.sidebar-collapsed .sidebar-resizer {
  display: none;
}

body.sidebar-collapsed .content-area {
  grid-column: 3;
}

body.sidebar-collapsed .sidebar-restore {
  display: grid;
}

body.sidebar-collapsed .brand {
  padding-left: 52px;
}

.drawer-backdrop {
  display: none;
}

.live-region {
  position: fixed;
  left: -9999px;
  width: 1px;
  height: 1px;
  overflow: hidden;
}

.noscript-message {
  max-width: 640px;
  margin: 40px auto;
  padding: 16px;
  background: var(--surface);
  border: 1px solid var(--border);
}

body.sidebar-resizing,
body.sidebar-resizing * {
  cursor: col-resize;
  user-select: none;
}

body.sidebar-resizing iframe {
  pointer-events: none;
}

@media (max-width: 1180px) {
  .app-header {
    gap: 10px;
  }

  .global-search kbd,
  .tool-label,
  .print-button span {
    display: none;
  }

  .global-search {
    grid-template-columns: 20px minmax(0, 1fr);
  }
}

@media (max-width: 1023px) and (min-width: 768px) {
  .app-header {
    grid-template-columns: min(260px, var(--sidebar-width)) minmax(200px, 1fr) auto;
  }

  .brand-version,
  .font-controls {
    display: none;
  }
}

@media (max-width: 767px) {
  :root {
    --header-height: 52px;
  }

  .app-header {
    grid-template-columns: auto minmax(0, 1fr) auto;
    gap: 4px;
    padding-right: max(6px, env(safe-area-inset-right));
    padding-left: max(6px, env(safe-area-inset-left));
  }

  .icon-button.sidebar-toggle {
    position: static;
    grid-column: 1;
    grid-row: 1;
    width: auto;
    min-width: 58px;
    padding: 0 8px;
    gap: 5px;
    color: var(--text);
    background: transparent;
    border-color: transparent;
  }

  .icon-button.sidebar-toggle:hover {
    color: var(--text);
    background: var(--surface-hover);
    border-color: transparent;
  }

  .icon-menu {
    display: block;
  }

  .icon-panel-close {
    display: none;
  }

  .brand {
    grid-column: 2;
    grid-row: 1;
    justify-self: start;
    align-self: center;
    max-width: 100%;
    height: 42px;
    padding: 0 4px;
    color: var(--accent);
    background: transparent;
  }

  .brand-title {
    font-size: 15px;
  }

  .brand-version,
  .global-search,
  .font-controls,
  .print-button {
    display: none;
  }

  .mobile-action-label {
    display: inline;
  }

  .header-actions {
    grid-column: 3;
    grid-row: 1;
  }

  .mobile-search-button {
    display: inline-grid;
  }

  .app-layout,
  body.sidebar-collapsed .app-layout {
    display: block;
    height: calc(100dvh - var(--header-height) - env(safe-area-inset-top));
  }

  .sidebar {
    position: fixed;
    top: calc(var(--header-height) + env(safe-area-inset-top));
    bottom: 0;
    left: 0;
    z-index: 50;
    visibility: hidden;
    width: min(88vw, 360px);
    padding-left: env(safe-area-inset-left);
    transform: translateX(-101%);
    opacity: 1;
    transition: transform 180ms ease, visibility 180ms;
  }

  body.drawer-open .sidebar {
    visibility: visible;
    transform: translateX(0);
  }

  .sidebar-resizer,
  .sidebar-restore,
  body.sidebar-collapsed .sidebar-restore {
    display: none;
  }

  .content-area,
  body.sidebar-collapsed .content-area {
    width: 100%;
    height: 100%;
  }

  .drawer-backdrop {
    position: fixed;
    top: calc(var(--header-height) + env(safe-area-inset-top));
    right: 0;
    bottom: 0;
    left: 0;
    z-index: 40;
    display: block;
    visibility: hidden;
    padding: 0;
    background: rgba(18, 20, 24, 0.48);
    border: 0;
    opacity: 0;
    transition: opacity 180ms ease, visibility 180ms;
  }

  body.drawer-open .drawer-backdrop {
    visibility: visible;
    opacity: 1;
  }

  body.drawer-open {
    overscroll-behavior: none;
  }

  .more-menu {
    right: max(8px, env(safe-area-inset-right));
    width: min(280px, calc(100vw - 16px));
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    transition-duration: 0.01ms !important;
  }
}

@media print {
  html,
  body {
    height: auto;
    overflow: visible;
    background: #ffffff;
  }

  .app-header,
  .sidebar,
  .sidebar-resizer,
  .sidebar-restore,
  .drawer-backdrop,
  .more-menu {
    display: none !important;
  }

  .app-layout,
  body.sidebar-collapsed .app-layout {
    display: block;
    height: auto;
  }

  .content-area,
  #content {
    width: 100%;
    height: 100vh;
    overflow: visible;
    background: #ffffff;
  }
}