:root {
  --theme-color: #42b983;
  --focus-ring-color: #0f6b45;
  --dm-toggle-top: max(10px, env(safe-area-inset-top));
  --dm-toggle-right: 128px;
  --dm-toggle-left: auto;
  --dm-toggle-size: 44px;
  --sidebar-width: 300px;
  --sidebar-toggle-width: 44px;
  --sidebar-controls-height: 60px;
  --control-icon-size: 20px;
  --control-radius: 50%;
  --control-hover-bg: rgba(0, 0, 0, 0.08);
  --sidebar-surface: #ffffff;
  --sidebar-border: rgba(15, 23, 42, 0.16);
  --search-panel-shadow: 0 8px 18px rgba(15, 23, 42, 0.14);
}

.dark-mode-toggle,
.language-trigger {
  align-items: center;
  appearance: none;
  background: transparent;
  border: 0;
  border-radius: var(--control-radius);
  box-sizing: border-box;
  color: var(--dm-toggle-color, currentColor);
  cursor: pointer;
  display: flex;
  height: var(--dm-toggle-size);
  justify-content: center;
  margin: 0;
  min-height: var(--dm-toggle-size);
  min-width: var(--dm-toggle-size);
  padding: 0;
  transition: background-color 0.2s ease, color 0.2s ease, opacity 0.2s ease, transform 0.2s ease;
  width: var(--dm-toggle-size);
}

.dark-mode-toggle {
  position: static;
}

.top-controls {
  align-items: center;
  background: transparent;
  border-top: 0;
  bottom: 0;
  box-sizing: border-box;
  display: flex;
  gap: 8px;
  justify-content: flex-end;
  left: calc(var(--sidebar-toggle-width) + env(safe-area-inset-left));
  min-height: var(--sidebar-controls-height);
  padding: 8px 16px max(8px, env(safe-area-inset-bottom));
  position: fixed;
  width: min(
    calc(var(--sidebar-width) - var(--sidebar-toggle-width)),
    calc(100vw - var(--sidebar-toggle-width) - env(safe-area-inset-left))
  );
  isolation: isolate;
  z-index: 1002;
  transition: opacity 0.25s ease, transform 0.25s ease, visibility 0.25s ease;
}

body.close .top-controls {
  opacity: 0;
  pointer-events: none;
  transform: translateX(calc(-100% - var(--sidebar-toggle-width)));
  visibility: hidden;
}

html.dark-mode .top-controls {
  background: transparent;
  border-top: 0;
}

html.dark-mode .sidebar .search {
  background: var(--sidebar-surface);
}

.dark-mode-toggle:hover,
.language-trigger:hover {
  background: var(--control-hover-bg);
  opacity: 1;
  transform: scale(1.05);
}

.dark-mode-toggle:focus-visible,
.language-trigger:focus-visible {
  outline: 2px solid var(--focus-ring-color);
  outline-offset: 3px;
}

.sidebar {
  box-sizing: border-box;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  padding-bottom: var(--sidebar-controls-height);
}

.sidebar .search {
  background: var(--sidebar-surface);
  border-bottom-color: var(--sidebar-border);
  flex: 0 0 auto;
  position: relative;
  z-index: 4;
}

.sidebar .search .results-panel {
  background: var(--sidebar-surface);
  border: 1px solid var(--sidebar-border);
  border-radius: 0 0 4px 4px;
  box-shadow: var(--search-panel-shadow);
  left: 6px;
  right: 6px;
  inset-inline: 6px;
  max-height: min(50vh, 420px);
  overflow-x: hidden;
  overflow-y: auto;
  overscroll-behavior: contain;
  -webkit-overflow-scrolling: touch;
  position: absolute;
  top: 100%;
  z-index: 5;
  scrollbar-color: rgba(128, 128, 128, 0.45) transparent;
  scrollbar-width: thin;
}

.sidebar .search .results-panel:not(.show) {
  display: none;
}

.sidebar .search .matching-post a {
  display: block;
  min-height: 44px;
  padding: 8px 10px;
}

.sidebar .search input {
  flex: 1 1 auto;
  font-size: 16px;
  min-height: 44px;
  min-width: 0;
}

.sidebar .search .clear-button {
  align-items: center;
  box-sizing: border-box;
  justify-content: center;
  min-height: 44px;
  min-width: 44px;
}

.sidebar .search .clear-button:not(.show) {
  display: none;
}

.sidebar .search .clear-button.show {
  display: flex;
}

.sidebar .sidebar-nav {
  flex: 1 1 auto;
  min-height: 0;
  overflow-x: hidden;
  overflow-y: auto;
  overscroll-behavior: contain;
  padding-bottom: 16px;
  scrollbar-color: rgba(128, 128, 128, 0.45) transparent;
  scrollbar-gutter: stable;
  scrollbar-width: thin;
}

.sidebar .sidebar-nav::-webkit-scrollbar,
.sidebar .search .results-panel::-webkit-scrollbar {
  width: 3px;
}

.sidebar .sidebar-nav::-webkit-scrollbar-thumb,
.sidebar .search .results-panel::-webkit-scrollbar-thumb {
  background: rgba(128, 128, 128, 0.45);
  border-radius: 999px;
}

.sidebar .sidebar-nav::-webkit-scrollbar-track,
.sidebar .search .results-panel::-webkit-scrollbar-track {
  background: transparent;
}

.sidebar-toggle {
  align-items: center;
  background: transparent;
  box-sizing: border-box;
  display: flex;
  height: var(--dm-toggle-size);
  justify-content: center;
  min-height: var(--dm-toggle-size);
  min-width: var(--sidebar-toggle-width);
  padding: 0;
  width: var(--sidebar-toggle-width);
  z-index: 1001;
}

body.close .sidebar-toggle {
  background: transparent;
  height: var(--dm-toggle-size);
  min-height: var(--dm-toggle-size);
  padding: 0;
  width: var(--sidebar-toggle-width);
}

.sidebar-toggle .sidebar-toggle-button {
  align-items: center;
  display: flex;
  flex-direction: column;
  gap: 4px;
  height: 16px;
  justify-content: center;
  width: 16px;
}

.sidebar-toggle .sidebar-toggle-button span {
  margin: 0;
}

.language-trigger {
  font: inherit;
  user-select: none;
}

.language-control {
  display: flex;
}

.control-icon {
  display: block;
  height: var(--control-icon-size);
  pointer-events: none;
  width: var(--control-icon-size);
}

.dark-mode-toggle svg.control-icon,
.language-trigger svg.control-icon {
  height: var(--control-icon-size) !important;
  max-height: var(--control-icon-size);
  max-width: var(--control-icon-size);
  width: var(--control-icon-size) !important;
}

.control-icon path,
.control-icon circle,
.control-icon line,
.control-icon polyline {
  fill: none;
  stroke: currentColor;
  stroke-linecap: round;
  stroke-linejoin: round;
  stroke-width: 2;
}

.sidebar ul li a:focus-visible,
.sidebar .search .clear-button:focus-visible {
  outline: 2px solid var(--focus-ring-color);
  outline-offset: 2px;
}

.sidebar .search input:focus {
  border-color: var(--focus-ring-color);
  box-shadow: 0 0 0 1px var(--focus-ring-color);
}

html.dark-mode,
html.dark-mode body,
html.dark-mode main,
html.dark-mode .content {
  background-color: var(--dm-bg);
}

html.dark-mode {
  --theme-color: #58a6ff;
  --focus-ring-color: #58a6ff;
  --control-hover-bg: rgba(255, 255, 255, 0.12);
  --sidebar-surface: var(--dm-bg-elevated, #1f2933);
  --sidebar-border: var(--dm-border, rgba(255, 255, 255, 0.18));
  --search-panel-shadow: 0 8px 18px rgba(0, 0, 0, 0.35);
}

html.dark-mode .sidebar-nav > ul > li {
  color: var(--dm-text-muted);
}

html.dark-mode .markdown-section .anchor span {
  color: var(--dm-text-strong);
}

@media (prefers-reduced-motion: reduce) {
  .dark-mode-toggle,
  .language-trigger,
  .top-controls,
  .sidebar,
  .sidebar-toggle,
  .content,
  .github-corner {
    transition: none;
  }

  .dark-mode-toggle:hover,
  .language-trigger:hover {
    transform: none;
  }
}

@media (max-width: 768px) {
  :root {
    --dm-toggle-top: max(8px, env(safe-area-inset-top));
    --dm-toggle-right: max(128px, calc(128px + env(safe-area-inset-right)));
    --dm-toggle-left: auto;
  }

  .top-controls {
    left: calc(var(--sidebar-toggle-width) + env(safe-area-inset-left));
  }

  body:not(.close) .top-controls {
    opacity: 0;
    pointer-events: none;
    transform: translateX(calc(-100% - var(--sidebar-toggle-width)));
    visibility: hidden;
  }

  body.close .top-controls {
    opacity: 1;
    pointer-events: auto;
    transform: translateX(0);
    visibility: visible;
  }

  .github-corner {
    display: none;
  }

  .markdown-section {
    box-sizing: border-box;
    max-width: none;
    padding: max(24px, calc(24px + env(safe-area-inset-top))) 16px max(40px, calc(24px + env(safe-area-inset-bottom)));
    width: 100%;
  }

  .markdown-section h1 {
    font-size: 2rem;
    line-height: 1.2;
    white-space: normal;
    overflow-wrap: anywhere;
  }

  .markdown-section h2 {
    font-size: 1.4rem;
    line-height: 1.3;
  }

  .markdown-section h3 {
    font-size: 1.1rem;
    line-height: 1.35;
  }

  .markdown-section a {
    overflow-wrap: anywhere;
  }

  .markdown-section table,
  .markdown-section pre {
    max-width: 100%;
    -webkit-overflow-scrolling: touch;
    overflow-x: auto;
  }

  .sidebar {
    padding-bottom: var(--sidebar-controls-height);
    padding-top: max(40px, env(safe-area-inset-top));
  }

  .sidebar ul li a {
    align-items: center;
    min-height: 44px;
    padding: 10px 16px;
    white-space: normal;
  }

  main,
  .content {
    min-height: 100dvh;
  }
}