:root {
  --compat-sidebar-width: 288px;
  --compat-bg: #f4f5f7;
  --compat-surface: #ffffff;
  --compat-text: #242629;
  --compat-border: #dfe1e5;
  --compat-accent: #991b1b;
  --scrollbar-thumb: rgba(36, 38, 41, 0.26);
  --scrollbar-thumb-hover: rgba(36, 38, 41, 0.42);
  --scrollbar-track: transparent;
  font-family: "Microsoft YaHei", "PingFang SC", "Noto Sans CJK SC", "Segoe UI", system-ui, sans-serif;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-webhelp-theme="light"]) {
    --scrollbar-thumb: rgba(231, 233, 236, 0.3);
    --scrollbar-thumb-hover: rgba(231, 233, 236, 0.48);
  }
}

html[data-webhelp-theme="dark"] {
  --scrollbar-thumb: rgba(231, 233, 236, 0.3);
  --scrollbar-thumb-hover: rgba(231, 233, 236, 0.48);
}

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%;
  height: 100%;
  margin: 0;
  overflow: hidden;
  color: #242629;
  background: #f4f5f7;
  color: var(--compat-text);
  background: var(--compat-bg);
}

.compat-layout {
  display: flex;
  height: 100vh;
  display: grid;
  grid-template-columns: var(--compat-sidebar-width) minmax(0, 1fr);
  width: 100%;
  height: 100vh;
  height: 100dvh;
}

.compat-sidebar {
  flex: 0 0 288px;
  min-width: 0;
  min-height: 0;
  background: var(--compat-surface);
  border-right: 1px solid var(--compat-border);
}

.compat-content {
  flex: 1 1 auto;
  min-width: 0;
  min-height: 0;
}

.compat-layout iframe {
  display: block;
  width: 100%;
  height: 100%;
  background: #ffffff;
  background: var(--compat-surface);
  border: 0;
}

.compat-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 48px;
  padding: 0 14px;
  color: var(--compat-accent);
  background: var(--compat-surface);
  border-bottom: 1px solid var(--compat-border);
  font-weight: 700;
}

.compat-header button,
.compat-toolbar button {
  min-height: 32px;
  padding: 0 9px;
  color: var(--compat-text);
  background: transparent;
  border: 1px solid var(--compat-border);
  border-radius: 5px;
  cursor: pointer;
}

.compat-toolbar {
  display: flex;
  gap: 5px;
  align-items: center;
  min-height: 42px;
  padding: 5px;
  background: var(--compat-surface);
}

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

@media (max-width: 767px) {
  .compat-layout {
    grid-template-columns: 1fr;
  }

  .compat-sidebar {
    display: none;
  }
}

@media print {
  .compat-sidebar,
  .compat-header,
  .compat-toolbar {
    display: none;
  }

  .compat-layout {
    display: block;
    height: auto;
  }
}