/* GitHub Docs Official Aesthetic Theme */
:root {
  --color-canvas-default: #ffffff;
  --color-canvas-subtle: #f6f8fa;
  --color-canvas-inset: #f6f8fa;
  --color-border-default: #d0d7de;
  --color-border-muted: #hsla(210,18%,87%,1);
  --color-border-subtle: #eaeef2;
  --color-fg-default: #1f2328;
  --color-fg-muted: #656d76;
  --color-fg-subtle: #6e7781;
  --color-accent-fg: #0969da;
  --color-accent-emphasis: #0969da;
  --color-accent-subtle: #ddf4ff;
  --color-accent-muted: #54aeff66;
  --color-success-fg: #1a7f37;
  --color-success-emphasis: #1f883d;
  --color-success-subtle: #dafbe1;
  --color-danger-fg: #cf222e;
  --color-danger-subtle: #ffebe9;
  --color-attention-fg: #9a6700;
  --color-attention-subtle: #fff8c5;
  --color-attention-border: #d4a72c;
  --color-header-bg: #24292f;
  --color-header-text: #ffffff;
  --color-code-bg: #f6f8fa;
  --color-code-border: #d0d7de;
  --color-sidebar-bg: #f6f8fa;
  --color-card-bg: #ffffff;
  --color-card-border: #d0d7de;
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "Noto Sans", Helvetica, Arial, sans-serif, "Apple Color Emoji", "Segoe UI Emoji";
  --font-mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, "Liberation Mono", monospace;
  --sidebar-width: 290px;
  --toc-width: 240px;
}

[data-theme="dark"] {
  --color-canvas-default: #0d1117;
  --color-canvas-subtle: #161b22;
  --color-canvas-inset: #010409;
  --color-border-default: #30363d;
  --color-border-muted: #21262d;
  --color-border-subtle: #21262d;
  --color-fg-default: #e6edf3;
  --color-fg-muted: #848d97;
  --color-fg-subtle: #6e7681;
  --color-accent-fg: #58a6ff;
  --color-accent-emphasis: #1f6feb;
  --color-accent-subtle: #388bfd26;
  --color-accent-muted: #388bfd66;
  --color-success-fg: #3fb950;
  --color-success-emphasis: #238636;
  --color-success-subtle: #2ea04326;
  --color-danger-fg: #f85149;
  --color-danger-subtle: #f8514926;
  --color-attention-fg: #d29922;
  --color-attention-subtle: #bb800926;
  --color-attention-border: #9e6a03;
  --color-header-bg: #161b22;
  --color-header-text: #e6edf3;
  --color-code-bg: #161b22;
  --color-code-border: #30363d;
  --color-sidebar-bg: #0d1117;
  --color-card-bg: #161b22;
  --color-card-border: #30363d;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: var(--font-sans);
  background-color: var(--color-canvas-default);
  color: var(--color-fg-default);
  line-height: 1.5;
  font-size: 14px;
  -webkit-font-smoothing: antialiased;
}

/* Header */
.gh-header {
  background-color: var(--color-header-bg);
  color: var(--color-header-text);
  position: sticky;
  top: 0;
  z-index: 100;
  border-bottom: 1px solid var(--color-border-default);
}

@media (min-width: 769px) {
  .gh-header {
    height: 64px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 24px;
  }
  .gh-header-top-row {
    display: contents;
  }
  .gh-mobile-menu-btn {
    display: none;
  }
  .sidebar-header-mobile {
    display: none;
  }
  .gh-sidebar-backdrop {
    display: none;
  }
}

.gh-header-left {
  display: flex;
  align-items: center;
  gap: 16px;
}

.gh-logo-group {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  color: inherit;
}

.gh-logo-img {
  width: 34px;
  height: 34px;
  border-radius: 8px;
  object-fit: cover;
  box-shadow: 0 0 12px rgba(88, 166, 255, 0.45);
  border: 1px solid rgba(255, 255, 255, 0.25);
  display: block;
}

.gh-docs-title {
  font-size: 16px;
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: 8px;
}

.gh-docs-badge {
  font-size: 11px;
  padding: 2px 7px;
  border-radius: 20px;
  font-weight: 500;
  background-color: rgba(255, 255, 255, 0.15);
  border: 1px solid rgba(255, 255, 255, 0.25);
  letter-spacing: 0.3px;
}

.gh-search-container {
  flex: 1;
  max-width: 480px;
  margin: 0 20px;
  position: relative;
  display: flex;
  align-items: center;
}

.gh-search-input {
  width: 100%;
  height: 36px;
  background-color: rgba(255, 255, 255, 0.12);
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: 6px;
  padding: 0 74px 0 36px;
  color: #ffffff;
  font-size: 14px;
  font-family: var(--font-sans);
  line-height: 20px;
  transition: all 0.2s cubic-bezier(0.3, 0, 0.5, 1);
}

.gh-search-input::placeholder {
  color: rgba(255, 255, 255, 0.65);
}

.gh-search-input:hover {
  background-color: rgba(255, 255, 255, 0.18);
  border-color: rgba(255, 255, 255, 0.35);
}

[data-theme="dark"] .gh-search-input {
  background-color: #21262d;
  border-color: #30363d;
  color: #e6edf3;
}

[data-theme="dark"] .gh-search-input::placeholder {
  color: #848d97;
}

[data-theme="dark"] .gh-search-input:hover {
  background-color: #282e36;
  border-color: #8b949e;
}

.gh-search-input:focus {
  outline: none;
  background-color: var(--color-canvas-default);
  color: var(--color-fg-default);
  border-color: var(--color-accent-fg);
  box-shadow: 0 0 0 3px var(--color-accent-subtle);
}

.gh-search-input:focus::placeholder {
  color: var(--color-fg-muted);
}

.gh-search-icon {
  position: absolute;
  left: 11px;
  top: 50%;
  transform: translateY(-50%);
  fill: #8b949e;
  pointer-events: none;
  transition: fill 0.15s ease;
  z-index: 2;
}

.gh-search-container:focus-within .gh-search-icon {
  fill: var(--color-accent-fg);
}

.gh-search-count-badge {
  position: absolute;
  right: 40px;
  top: 50%;
  transform: translateY(-50%);
  font-size: 11px;
  font-weight: 600;
  padding: 2px 7px;
  border-radius: 10px;
  background-color: var(--color-accent-emphasis);
  color: #ffffff;
  display: none;
  align-items: center;
  justify-content: center;
  z-index: 2;
  pointer-events: none;
}

.gh-search-count-badge.visible {
  display: inline-flex;
}

.gh-search-kbd {
  position: absolute;
  right: 10px;
  top: 50%;
  transform: translateY(-50%);
  font-size: 11px;
  font-weight: 500;
  line-height: 1;
  padding: 3px 6px;
  border-radius: 4px;
  background-color: rgba(255, 255, 255, 0.15);
  color: #e6edf3;
  font-family: var(--font-mono);
  border: 1px solid rgba(255, 255, 255, 0.2);
  pointer-events: none;
  transition: opacity 0.15s ease;
}

[data-theme="dark"] .gh-search-kbd {
  background-color: #30363d;
  border-color: #484f58;
  color: #8b949e;
}

.gh-search-container:focus-within .gh-search-kbd {
  opacity: 0;
}

.gh-search-clear-btn {
  position: absolute;
  right: 6px;
  top: 50%;
  transform: translateY(-50%);
  background: transparent;
  border: none;
  color: var(--color-fg-muted);
  width: 28px;
  height: 28px;
  display: none;
  align-items: center;
  justify-content: center;
  font-size: 13px;
  cursor: pointer;
  border-radius: 50%;
  transition: all 0.15s;
  z-index: 3;
  touch-action: manipulation;
}

.gh-search-clear-btn:hover,
.gh-search-clear-btn:active {
  background-color: rgba(255, 255, 255, 0.2);
  color: #ffffff;
}

[data-theme="light"] .gh-search-clear-btn:hover,
[data-theme="light"] .gh-search-clear-btn:active {
  background-color: rgba(0, 0, 0, 0.08);
  color: #000000;
}

.gh-search-clear-btn.visible {
  display: flex;
}

.gh-header-right {
  display: flex;
  align-items: center;
  gap: 12px;
}

.gh-btn-icon {
  background: transparent;
  border: 1px solid rgba(255, 255, 255, 0.2);
  color: inherit;
  border-radius: 6px;
  padding: 6px 10px;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 13px;
  font-weight: 500;
  transition: background 0.15s;
}

.gh-btn-icon:hover {
  background: rgba(255, 255, 255, 0.1);
}

/* Main Layout */
.gh-layout {
  display: flex;
  min-height: calc(100vh - 64px);
}

/* Sidebar */
.gh-sidebar {
  width: var(--sidebar-width);
  background-color: var(--color-sidebar-bg);
  border-right: 1px solid var(--color-border-default);
  padding: 20px 16px;
  flex-shrink: 0;
  position: sticky;
  top: 64px;
  height: calc(100vh - 64px);
  overflow-y: auto;
}

.sidebar-heading {
  font-size: 12px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--color-fg-muted);
  margin: 16px 8px 8px 8px;
}

.sidebar-heading:first-child {
  margin-top: 4px;
}

.sidebar-nav-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.sidebar-item-btn {
  width: 100%;
  text-align: left;
  background: transparent;
  border: none;
  color: var(--color-fg-default);
  padding: 7px 10px;
  border-radius: 6px;
  font-size: 13px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: space-between;
  transition: background 0.1s, color 0.1s;
}

.sidebar-item-btn:hover {
  background-color: var(--color-canvas-subtle);
  color: var(--color-accent-fg);
}

.sidebar-item-btn.active {
  background-color: var(--color-accent-subtle);
  color: var(--color-accent-fg);
  font-weight: 600;
}

.sidebar-count {
  font-size: 11px;
  padding: 1px 6px;
  border-radius: 10px;
  background-color: var(--color-border-default);
  color: var(--color-fg-muted);
}

/* Main Article Content */
.gh-content {
  flex: 1;
  padding: 32px 48px;
  max-width: 1000px;
  overflow-x: hidden;
}

/* Breadcrumbs */
.gh-breadcrumbs {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 12px;
  color: var(--color-fg-muted);
  margin-bottom: 16px;
}

.gh-breadcrumbs a {
  color: var(--color-fg-muted);
  text-decoration: none;
}

.gh-breadcrumbs a:hover {
  color: var(--color-accent-fg);
  text-decoration: underline;
}

.gh-breadcrumbs-separator {
  color: var(--color-fg-subtle);
}

.gh-page-title {
  font-size: 30px;
  font-weight: 600;
  line-height: 1.25;
  margin-bottom: 10px;
  color: var(--color-fg-default);
}

.gh-page-lead {
  font-size: 16px;
  color: var(--color-fg-muted);
  margin-bottom: 24px;
  line-height: 1.5;
}

/* Alert Boxes (GitHub Callouts) */
.gh-alert {
  padding: 16px;
  border-radius: 6px;
  margin-bottom: 24px;
  border-left: 4px solid;
  display: flex;
  gap: 12px;
}

.gh-alert-warning {
  background-color: var(--color-attention-subtle);
  border-color: var(--color-attention-border);
  color: var(--color-fg-default);
}

.gh-alert-info {
  background-color: var(--color-accent-subtle);
  border-color: var(--color-accent-fg);
  color: var(--color-fg-default);
}

.gh-alert-icon {
  flex-shrink: 0;
  width: 18px;
  height: 18px;
  fill: currentColor;
  margin-top: 2px;
}

.gh-alert-content {
  font-size: 13px;
  line-height: 1.5;
}

.gh-alert-title {
  font-weight: 600;
  margin-bottom: 4px;
  display: flex;
  align-items: center;
  gap: 6px;
}

/* Parameter Replacer Toolbar */
.gh-param-toolbar {
  background-color: var(--color-canvas-subtle);
  border: 1px solid var(--color-border-default);
  border-radius: 6px;
  padding: 10px 14px;
  margin-bottom: 20px;
  display: flex;
  align-items: center;
}

.param-input-group {
  display: flex;
  align-items: center;
  gap: 10px;
  width: 100%;
}

.param-input {
  flex: 1;
  height: 34px;
  padding: 0 12px;
  border: 1px solid var(--color-border-default);
  border-radius: 6px;
  background-color: var(--color-canvas-default);
  color: var(--color-fg-default);
  font-size: 13px;
  font-family: var(--font-sans);
  transition: all 0.15s ease;
}

.param-input:focus {
  outline: none;
  border-color: var(--color-accent-fg);
  box-shadow: 0 0 0 3px var(--color-accent-subtle);
}

/* Filter Chips */
.gh-filter-chips {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin-bottom: 24px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--color-border-subtle);
}

.filter-chip {
  padding: 6px 14px;
  border-radius: 20px;
  border: 1px solid var(--color-border-default);
  background-color: var(--color-canvas-subtle);
  color: var(--color-fg-default);
  font-size: 13px;
  font-weight: 500;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: all 0.15s ease;
  user-select: none;
}

.filter-chip:hover {
  background-color: var(--color-canvas-default);
  border-color: var(--color-accent-fg);
  color: var(--color-accent-fg);
}

.filter-chip.active {
  background-color: var(--color-accent-emphasis);
  border-color: var(--color-accent-emphasis);
  color: #ffffff;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.15);
}

/* Prompt Card List */
.prompts-container {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.prompt-card {
  background-color: var(--color-card-bg);
  border: 1px solid var(--color-card-border);
  border-radius: 8px;
  overflow: hidden;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.05);
  transition: border-color 0.15s, box-shadow 0.15s;
}

.prompt-card:hover {
  border-color: var(--color-accent-muted);
}

.prompt-card-header {
  padding: 16px 20px;
  background-color: var(--color-canvas-subtle);
  border-bottom: 1px solid var(--color-border-default);
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 16px;
}

.prompt-title-group {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.prompt-title {
  font-size: 16px;
  font-weight: 600;
  color: var(--color-fg-default);
  display: flex;
  align-items: center;
  gap: 8px;
}

.prompt-badges {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.badge {
  font-size: 11px;
  padding: 2px 8px;
  border-radius: 12px;
  font-weight: 500;
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

.badge-model {
  background-color: var(--color-accent-subtle);
  color: var(--color-accent-fg);
  border: 1px solid var(--color-accent-muted);
}

.badge-technique {
  background-color: var(--color-success-subtle);
  color: var(--color-success-fg);
  border: 1px solid rgba(46, 160, 67, 0.3);
}

.badge-vector {
  background-color: var(--color-attention-subtle);
  color: var(--color-attention-fg);
  border: 1px solid rgba(210, 153, 34, 0.3);
}

.prompt-actions {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-shrink: 0;
}

.btn-action {
  padding: 6px 12px;
  border-radius: 6px;
  border: 1px solid var(--color-border-default);
  background-color: var(--color-canvas-default);
  color: var(--color-fg-default);
  font-size: 12px;
  font-weight: 500;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 6px;
  transition: all 0.15s;
}

.btn-action:hover {
  background-color: var(--color-canvas-subtle);
  border-color: var(--color-fg-subtle);
}

.btn-action.copied {
  background-color: var(--color-success-emphasis);
  border-color: var(--color-success-emphasis);
  color: #fff;
}

.prompt-card-body {
  padding: 16px 20px;
}

.prompt-description {
  font-size: 13px;
  color: var(--color-fg-muted);
  margin-bottom: 12px;
  line-height: 1.5;
}

/* Code Viewer */
.code-container {
  position: relative;
  border: 1px solid var(--color-code-border);
  border-radius: 6px;
  background-color: var(--color-code-bg);
  overflow: hidden;
}

.code-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 8px 12px;
  background-color: var(--color-canvas-subtle);
  border-bottom: 1px solid var(--color-code-border);
  font-size: 11px;
  color: var(--color-fg-muted);
  font-family: var(--font-mono);
  gap: 8px;
}

.code-header-left {
  display: flex;
  align-items: center;
  gap: 8px;
}

.code-badge-pill {
  font-size: 10px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  background-color: var(--color-accent-subtle);
  color: var(--color-accent-fg);
  padding: 1px 6px;
  border-radius: 4px;
  border: 1px solid var(--color-accent-muted);
}

.code-line-counter {
  color: var(--color-fg-subtle);
}

.code-header-right {
  display: flex;
  align-items: center;
  gap: 6px;
}

.btn-code-toggle {
  background: var(--color-canvas-default);
  border: 1px solid var(--color-border-default);
  color: var(--color-accent-fg);
  border-radius: 4px;
  padding: 3px 8px;
  font-size: 11px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.15s ease;
  line-height: 1;
}

.btn-code-toggle:hover {
  background-color: var(--color-accent-subtle);
  border-color: var(--color-accent-fg);
}

.btn-code-copy {
  background: var(--color-canvas-default);
  border: 1px solid var(--color-border-default);
  color: var(--color-fg-default);
  border-radius: 4px;
  padding: 3px 8px;
  font-size: 11px;
  font-weight: 500;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 4px;
  transition: all 0.15s ease;
  line-height: 1;
}

.btn-code-copy:hover {
  background-color: var(--color-canvas-subtle);
  border-color: var(--color-fg-subtle);
}

.code-content {
  margin: 0;
  padding: 14px 16px;
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 1.6;
  overflow-x: auto;
  white-space: pre-wrap;
  word-break: break-word;
  color: var(--color-fg-default);
  transition: max-height 0.25s ease-out;
}

.code-content.collapsed {
  max-height: 190px;
  overflow-y: hidden;
  position: relative;
  -webkit-mask-image: linear-gradient(180deg, rgba(0,0,0,1) 50%, rgba(0,0,0,0) 100%);
  mask-image: linear-gradient(180deg, rgba(0,0,0,1) 50%, rgba(0,0,0,0) 100%);
}

.code-content.expanded {
  max-height: none;
  -webkit-mask-image: none;
  mask-image: none;
}

/* Proofs & Details collapsible */
.prompt-proofs {
  margin-top: 14px;
}

.proofs-details {
  border: 1px solid var(--color-border-default);
  border-radius: 6px;
  background-color: var(--color-canvas-subtle);
  padding: 8px 14px;
}

.proofs-details summary {
  font-size: 12px;
  font-weight: 600;
  color: var(--color-accent-fg);
  cursor: pointer;
}

.proofs-gallery {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 12px;
}

.proof-img {
  max-width: 100%;
  max-height: 280px;
  border-radius: 4px;
  border: 1px solid var(--color-border-default);
  object-fit: contain;
  background-color: #000;
}

/* Right TOC */
.gh-toc {
  width: var(--toc-width);
  padding: 24px 16px;
  position: sticky;
  top: 64px;
  height: calc(100vh - 64px);
  overflow-y: auto;
  flex-shrink: 0;
  display: none;
}

@media (min-width: 1280px) {
  .gh-toc {
    display: block;
  }
}

.toc-title {
  font-size: 12px;
  font-weight: 700;
  text-transform: uppercase;
  color: var(--color-fg-muted);
  margin-bottom: 12px;
  letter-spacing: 0.5px;
}

.toc-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.toc-link {
  font-size: 12px;
  color: var(--color-fg-muted);
  text-decoration: none;
  line-height: 1.4;
  display: block;
  transition: color 0.1s;
}

.toc-link:hover {
  color: var(--color-accent-fg);
}

/* Toast */
.gh-toast {
  position: fixed;
  bottom: 24px;
  right: 24px;
  background-color: var(--color-header-bg);
  color: var(--color-header-text);
  padding: 10px 18px;
  border-radius: 6px;
  font-size: 13px;
  font-weight: 500;
  box-shadow: 0 4px 12px rgba(0,0,0,0.25);
  display: flex;
  align-items: center;
  gap: 8px;
  opacity: 0;
  transform: translateY(12px);
  transition: all 0.2s ease;
  pointer-events: none;
  z-index: 1000;
}

.gh-toast.show {
  opacity: 1;
  transform: translateY(0);
}

/* Search Feedback Banner */
.search-feedback-banner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  background-color: var(--color-accent-subtle);
  border: 1px solid var(--color-accent-muted);
  border-radius: 8px;
  padding: 10px 14px;
  margin-bottom: 20px;
  gap: 12px;
  color: var(--color-fg-default);
  font-size: 13px;
  animation: fadeIn 0.15s ease-out;
}

.feedback-text {
  display: flex;
  align-items: center;
  gap: 8px;
  flex: 1;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.feedback-clear-btn {
  background: var(--color-canvas-default);
  border: 1px solid var(--color-accent-muted);
  color: var(--color-accent-fg);
  border-radius: 6px;
  padding: 5px 12px;
  font-size: 12px;
  font-weight: 600;
  cursor: pointer;
  flex-shrink: 0;
  transition: all 0.15s ease;
}

.feedback-clear-btn:hover {
  background-color: var(--color-accent-emphasis);
  color: #ffffff;
}

/* Empty Search State */
.search-empty-state {
  text-align: center;
  padding: 44px 20px;
  background-color: var(--color-canvas-subtle);
  border: 1px dashed var(--color-border-default);
  border-radius: 12px;
  margin: 16px 0 32px;
}

.empty-icon-circle {
  width: 56px;
  height: 56px;
  border-radius: 50%;
  background-color: var(--color-canvas-default);
  border: 1px solid var(--color-border-default);
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 16px;
  color: var(--color-fg-muted);
}

.empty-title {
  font-size: 17px;
  font-weight: 600;
  color: var(--color-fg-default);
  margin-bottom: 8px;
}

.empty-desc {
  font-size: 13px;
  color: var(--color-fg-muted);
  margin-bottom: 16px;
  max-width: 440px;
  margin-left: auto;
  margin-right: auto;
  line-height: 1.5;
}

.empty-suggestions {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 8px;
  margin-bottom: 20px;
  max-width: 520px;
  margin-left: auto;
  margin-right: auto;
}

.suggestion-chip {
  background-color: var(--color-canvas-default);
  border: 1px solid var(--color-border-default);
  color: var(--color-accent-fg);
  border-radius: 20px;
  padding: 6px 14px;
  font-size: 12px;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.15s ease;
}

.suggestion-chip:hover {
  background-color: var(--color-accent-subtle);
  border-color: var(--color-accent-fg);
}

.empty-clear-btn {
  margin: 0 auto;
  display: inline-flex;
}

/* Floating Back to Top Button */
.gh-back-to-top {
  position: fixed;
  bottom: 24px;
  right: 20px;
  width: 42px;
  height: 42px;
  border-radius: 50%;
  background-color: var(--color-accent-emphasis);
  color: #ffffff;
  border: none;
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.35);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 90;
  opacity: 0;
  visibility: hidden;
  transform: translateY(12px);
  transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
  touch-action: manipulation;
}

.gh-back-to-top.visible {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.gh-back-to-top:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.45);
}

.gh-back-to-top:active {
  transform: translateY(0);
}

/* Responsive Styles */
@media (max-width: 768px) {
  .gh-header {
    padding: 10px 12px 10px;
    display: flex;
    flex-direction: column;
    gap: 8px;
  }

  .gh-header-top-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    width: 100%;
    gap: 8px;
  }

  .gh-header-left {
    display: flex;
    align-items: center;
    gap: 10px;
    min-width: 0;
    flex: 1;
  }

  .gh-mobile-menu-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    border-radius: 6px;
    background: transparent;
    border: 1px solid rgba(255, 255, 255, 0.2);
    color: inherit;
    cursor: pointer;
    flex-shrink: 0;
    touch-action: manipulation;
  }

  .gh-mobile-menu-btn:hover,
  .gh-mobile-menu-btn:active {
    background: rgba(255, 255, 255, 0.15);
  }

  .gh-logo-group {
    min-width: 0;
    gap: 8px;
  }

  .gh-logo-img {
    width: 28px;
    height: 28px;
    flex-shrink: 0;
  }

  .gh-docs-title {
    font-size: 15px;
    font-weight: 600;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
  }

  .gh-header-right {
    display: flex;
    align-items: center;
    gap: 6px;
    flex-shrink: 0;
  }

  .btn-text {
    display: none;
  }

  .gh-btn-icon {
    width: 36px;
    height: 36px;
    padding: 0;
    justify-content: center;
    border-radius: 6px;
    touch-action: manipulation;
  }

  /* Full-width Touch-Optimized Search Bar on mobile */
  .gh-search-container {
    width: 100%;
    max-width: 100%;
    margin: 0;
    position: relative;
  }

  .gh-search-input {
    height: 42px;
    font-size: 16px; /* 16px prevents iOS Safari auto-zoom on focus! */
    padding: 0 74px 0 38px;
    border-radius: 8px;
    line-height: 22px;
  }

  .gh-search-icon {
    left: 12px;
  }

  .gh-search-kbd {
    display: none;
  }

  .gh-search-clear-btn {
    right: 6px;
    width: 32px;
    height: 32px;
    font-size: 14px;
  }

  .gh-search-count-badge {
    right: 42px;
  }

  /* Mobile Sidebar Drawer */
  .gh-sidebar {
    position: fixed;
    top: 0;
    left: 0;
    bottom: 0;
    width: 290px;
    max-width: 86vw;
    background-color: var(--color-canvas-default);
    z-index: 200;
    transform: translateX(-100%);
    transition: transform 0.25s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: 4px 0 28px rgba(0, 0, 0, 0.5);
    padding: 16px 14px;
    overflow-y: auto;
    height: 100vh;
    -webkit-overflow-scrolling: touch;
  }

  .gh-sidebar.open {
    transform: translateX(0);
  }

  .sidebar-header-mobile {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding-bottom: 12px;
    margin-bottom: 14px;
    border-bottom: 1px solid var(--color-border-default);
  }

  .sidebar-mobile-title {
    font-size: 16px;
    font-weight: 600;
    color: var(--color-fg-default);
  }

  .gh-sidebar-close-btn {
    width: 32px;
    height: 32px;
    border-radius: 6px;
    background: transparent;
    border: 1px solid var(--color-border-default);
    color: var(--color-fg-default);
    font-size: 15px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    touch-action: manipulation;
  }

  /* Backdrop Overlay */
  .gh-sidebar-backdrop {
    display: block;
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.65);
    backdrop-filter: blur(2px);
    z-index: 199;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.25s ease;
  }

  .gh-sidebar-backdrop.open {
    opacity: 1;
    pointer-events: auto;
  }

  /* Content area on mobile */
  .gh-content {
    padding: 16px 14px 60px;
    max-width: 100%;
    width: 100%;
    overflow-x: hidden;
  }

  .gh-page-title {
    font-size: 22px;
    line-height: 1.3;
    margin-bottom: 8px;
  }

  .gh-page-lead {
    font-size: 13px;
    margin-bottom: 16px;
    line-height: 1.45;
  }

  .gh-alert {
    padding: 12px 14px;
    gap: 10px;
    font-size: 12px;
    margin-bottom: 18px;
    border-radius: 8px;
  }

  .gh-alert-title {
    font-size: 13px;
    margin-bottom: 2px;
  }

  /* Filter Chips touch-friendly swipeable row */
  .gh-filter-chips {
    display: flex;
    flex-wrap: nowrap;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
    padding: 4px 2px 12px 2px;
    margin-bottom: 16px;
    gap: 8px;
    scroll-snap-type: x proximity;
  }

  .gh-filter-chips::-webkit-scrollbar {
    display: none;
  }

  .filter-chip {
    flex-shrink: 0;
    white-space: nowrap;
    font-size: 13px;
    font-weight: 500;
    height: 36px;
    padding: 0 14px;
    display: inline-flex;
    align-items: center;
    border-radius: 18px;
    scroll-snap-align: start;
    touch-action: manipulation;
  }

  .filter-chip.active {
    box-shadow: 0 2px 8px rgba(9, 105, 218, 0.35);
  }

  /* Search feedback banner on mobile */
  .search-feedback-banner {
    padding: 8px 12px;
    font-size: 12px;
    margin-bottom: 14px;
  }

  /* Prompt Cards on mobile */
  .prompts-container {
    gap: 16px;
  }

  .prompt-card {
    border-radius: 10px;
    border: 1px solid var(--color-border-default);
  }

  .prompt-card-header {
    padding: 12px 14px;
    flex-direction: column;
    align-items: stretch;
    gap: 12px;
  }

  .prompt-title {
    font-size: 15px;
    line-height: 1.35;
  }

  .prompt-actions {
    width: 100%;
    align-self: stretch;
  }

  .btn-copy-card {
    width: 100%;
    height: 38px;
    justify-content: center;
    font-size: 13px;
    font-weight: 600;
    border-radius: 6px;
    touch-action: manipulation;
  }

  .prompt-card-body {
    padding: 12px 14px 14px;
  }

  .prompt-description {
    font-size: 12px;
    margin-bottom: 12px;
    line-height: 1.45;
  }

  .code-container {
    border-radius: 8px;
  }

  .code-header {
    padding: 8px 10px;
  }

  .code-content {
    padding: 12px;
    font-size: 12px;
    line-height: 1.55;
  }

  .proofs-details {
    padding: 10px 12px;
  }

  .proofs-details summary {
    font-size: 12px;
  }

  .proof-img {
    max-height: 200px;
    width: 100%;
    object-fit: contain;
  }

  .gh-toast {
    bottom: 16px;
    right: 16px;
    left: 16px;
    text-align: center;
    justify-content: center;
    font-size: 13px;
    padding: 10px 14px;
  }

  .gh-back-to-top {
    bottom: 20px;
    right: 16px;
    width: 40px;
    height: 40px;
  }
}

@media (max-width: 420px) {
  .gh-page-title {
    font-size: 20px;
  }

  .gh-docs-title {
    font-size: 14px;
  }

  .gh-header {
    padding: 8px 10px;
  }

  .gh-content {
    padding: 12px 10px 60px;
  }

  .filter-chip {
    padding: 0 12px;
    font-size: 12px;
  }
}