:root,
[data-syntax-theme="github"] {
  color-scheme: light;
  --font-sans: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;

  --bg-color: #f8fafc;
  --bg-surface: #ffffff;
  --bg-surface-elevated: #f1f5f9;
  --text-color: #0f172a;
  --text-muted: #64748b;
  --border-color: #e2e8f0;
  --primary-color: #2563eb;
  --primary-hover: #1d4ed8;
  --accent-color: #0ea5e9;
  --code-bg: #f1f5f9;
  --code-color: #0f172a;
  --syntax-background: var(--code-bg);
  --syntax-foreground: var(--code-color);
  --card-shadow: 0 1px 3px 0 rgb(0 0 0 / 0.1), 0 1px 2px -1px rgb(0 0 0 / 0.1);
  --card-shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: 2rem;
}

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

body {
  font-family: var(--font-sans);
  background-color: var(--bg-color);
  color: var(--text-color);
  line-height: 1.6;
  padding: 0;
  margin: 0;
}

/*
 * ==========================================================================
 * PRE-UPGRADE STYLING (FALLBACK)
 * Applied to <show-keystrokes> before the Custom Element is defined in the browser.
 * ==========================================================================
 */
show-keystrokes:not(:defined) {
  display: inline-block;
  font-family: var(--font-mono);
  padding: 0.4rem 0.75rem;
  border-radius: 8px;
  border: 1px solid var(--border-color);
  background: var(--bg-surface);
  color: var(--text-muted);
}

/* Container */
.container {
  max-width: 1320px;
  margin: 0 auto;
  padding: 2rem 1.5rem 5rem;
}

/* Header */
header {
  margin-bottom: 2.5rem;
  padding-bottom: 2rem;
  border-bottom: 1px solid var(--border-color);
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.header-top {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1rem;
}

.title-group h1 {
  font-size: 2.25rem;
  font-weight: 800;
  letter-spacing: -0.025em;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.title-tag {
  font-family: var(--font-mono);
  color: var(--primary-color);
}

.description {
  font-size: 1.125rem;
  color: var(--text-muted);
  max-width: 840px;
  line-height: 1.6;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  flex-wrap: wrap;
}

.github-btn,
.npm-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem 0.875rem;
  border-radius: 6px;
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--text-color);
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  text-decoration: none;
  transition: all 0.2s ease;
}

.github-btn:hover,
.npm-btn:hover {
  background: var(--bg-surface-elevated);
  border-color: var(--primary-color);
  color: var(--primary-color);
}

.github-btn svg,
.npm-btn svg {
  flex-shrink: 0;
}

/* Page Layout & Sidenav (Scrollspy) */
.page-layout {
  display: grid;
  grid-template-columns: 240px minmax(0, 1fr);
  gap: 3rem;
  align-items: start;
}

@media (max-width: 800px) {
  .page-layout {
    grid-template-columns: minmax(0, 1fr);
    gap: 2rem;
  }
}

.sidebar {
  position: sticky;
  top: 1.5rem;
  max-height: calc(100vh - 3rem);
  overflow-y: auto;
  padding-right: 0.5rem;
}

@media (max-width: 800px) {
  .sidebar {
    position: static;
    max-height: none;
    overflow-y: visible;
    padding-right: 0;
    padding-bottom: 1.5rem;
    border-bottom: 1px solid var(--border-color);
    margin-bottom: 1.5rem;
  }
}

.sidenav {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.sidenav-title {
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  font-weight: 700;
  color: var(--text-muted);
  padding: 0 0.75rem 0.25rem;
}

.sidenav-list {
  scroll-target-group: auto;
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 0.15rem;
}

@media (max-width: 800px) {
  .sidenav-list {
    flex-direction: row;
    flex-wrap: wrap;
    gap: 0.35rem;
  }
}

.sidenav-list a {
  display: block;
  padding: 0.4rem 0.75rem;
  font-size: 0.875rem;
  color: var(--text-muted);
  text-decoration: none;
  border-radius: 6px;
  border-left: 2px solid transparent;
  transition: all 0.15s ease;
}

@media (max-width: 800px) {
  .sidenav-list a {
    border-left: none;
    border-bottom: 2px solid transparent;
    padding: 0.35rem 0.65rem;
  }
}

.sidenav-list a:hover {
  color: var(--text-color);
  background: var(--bg-surface-elevated);
}

.sidenav-list a:target-current,
.sidenav-list a.is-active {
  color: var(--primary-color);
  background: rgba(37, 99, 235, 0.08);
  border-left-color: var(--primary-color);
  font-weight: 600;
}

@media (max-width: 800px) {
  .sidenav-list a:target-current,
  .sidenav-list a.is-active {
    border-left-color: transparent;
    border-bottom-color: var(--primary-color);
  }
}

.sidenav-divider {
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  font-weight: 700;
  color: var(--text-muted);
  padding: 0.75rem 0.75rem 0.25rem;
  margin-top: 0.35rem;
  border-top: 1px solid var(--border-color);
}

@media (max-width: 800px) {
  .sidenav-divider {
    width: 100%;
    border-top: none;
    padding: 0.25rem 0.65rem 0;
  }
}

/* Main Content */
main,
.main-content {
  display: flex;
  flex-direction: column;
  gap: 3.5rem;
  min-width: 0;
}

section {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.main-content > h2,
section h2 {
  font-size: 1.5rem;
  font-weight: 700;
  letter-spacing: -0.015em;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.main-content > h2 {
  margin-bottom: -1.75rem;
}

section > h3 {
  font-size: 1.25rem;
  font-weight: 700;
  letter-spacing: -0.015em;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.section-desc {
  color: var(--text-muted);
  font-size: 1rem;
  max-width: 800px;
}

.section-desc a {
  color: var(--primary-color);
  font-weight: 500;
  text-decoration: underline;
  text-underline-offset: 2px;
}

.section-desc a:hover {
  color: var(--primary-hover);
}

/* Cards & Grid */
.card {
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  padding: 1.5rem;
  box-shadow: var(--card-shadow);
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.card-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.card-title {
  font-weight: 600;
  font-size: 1rem;
  color: var(--text-color);
}

.card-meta {
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  color: var(--text-muted);
  background: var(--bg-surface-elevated);
  padding: 0.2rem 0.5rem;
  border-radius: 4px;
}

.card-text {
  font-size: 0.925rem;
  color: var(--text-muted);
}

/* Bookmarklet */
.bookmarklet-row {
  display: flex;
  align-items: center;
  gap: 1rem;
  flex-wrap: wrap;
}

.bookmarklet-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.6rem 1.1rem;
  border-radius: 8px;
  font-size: 0.925rem;
  font-weight: 600;
  color: #ffffff;
  background: var(--primary-color);
  border: 1px solid var(--primary-color);
  text-decoration: none;
  cursor: grab;
  box-shadow: 0 2px 6px rgba(37, 99, 235, 0.25);
  transition: transform 0.15s ease, box-shadow 0.15s ease, background 0.15s ease;
}

.bookmarklet-btn:hover {
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(37, 99, 235, 0.35);
}

.bookmarklet-btn:active {
  cursor: grabbing;
  transform: translateY(0);
}

.bookmarklet-hint {
  font-size: 0.875rem;
  color: var(--text-muted);
}

/* Extension Section */
.warning-box {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.85rem 1rem;
  border-radius: 8px;
  background-color: #fffbeb;
  border: 1px solid #fde68a;
  color: #92400e;
  font-size: 0.9rem;
  max-width: 800px;
}

.warning-box svg {
  flex-shrink: 0;
  color: #d97706;
}

.extension-intro {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.extension-details {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.extension-features-list {
  padding-left: 1.25rem;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  color: var(--text-muted);
  font-size: 0.925rem;
}

.extension-features-list strong {
  color: var(--text-color);
}

.extension-cta {
  display: flex;
  align-items: center;
}

.webstore-badge-link {
  display: inline-flex;
  border-radius: 8px;
  transition: transform 0.15s ease, opacity 0.15s ease;
}

.webstore-badge-link:hover {
  transform: translateY(-1px);
}

.webstore-badge-link img {
  display: block;
  height: 62px;
  width: auto;
}

/* Features Grid */
.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.25rem;
  margin-top: 1rem;
}

.feature-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  padding: 1.25rem;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.feature-card h3 {
  font-size: 1rem;
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.feature-card p {
  font-size: 0.875rem;
  color: var(--text-muted);
  line-height: 1.5;
}

/* Tables */
.table-wrapper {
  overflow-x: auto;
  border: 1px solid var(--border-color);
  border-radius: 8px;
}

.data-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.875rem;
  text-align: left;
}

.data-table th,
.data-table td {
  padding: 0.75rem 1rem;
  border-bottom: 1px solid var(--border-color);
}

.data-table th {
  background: var(--bg-surface-elevated);
  font-weight: 600;
  color: var(--text-color);
}

.data-table tr:last-child td {
  border-bottom: none;
}

/* Code Snippets & <micro-lighter> */
pre,
code {
  font-family: var(--font-mono);
}

code {
  background-color: var(--code-bg);
  color: var(--code-color);
  padding: 0.15rem 0.35rem;
  border-radius: 4px;
  font-size: 0.875em;
}

pre {
  background-color: var(--code-bg);
  color: var(--code-color);
  padding: 1rem;
  border-radius: 6px;
  overflow-x: auto;
  font-size: 0.875rem;
  line-height: 1.5;
  border: 1px solid var(--border-color);
  margin-top: 0.75rem;
}

pre code {
  background: none;
  padding: 0;
  font-size: inherit;
}

micro-lighter {
  display: grid;
  position: relative;
  margin-top: 0.75rem;
}

micro-lighter > pre {
  margin: 0;
  padding-right: 3rem;
}

micro-lighter::part(copy-button) {
  position: absolute;
  top: 0.5rem;
  right: 0.5rem;
  margin: 0;
  width: 2rem;
  height: 2rem;
  padding: 0;
  box-sizing: border-box;
  border-radius: 6px;
  border: 1px solid var(--border-color);
  background-color: var(--bg-surface);
  color: var(--text-muted);
  font-size: 0;
  line-height: 0;
  cursor: pointer;
  transition: color 0.15s ease, border-color 0.15s ease, background-color 0.15s ease;
}

micro-lighter::part(copy-button):hover {
  color: var(--text-color);
  border-color: var(--primary-color);
  background-color: var(--bg-surface-elevated);
}

/*
 * ==========================================================================
 * SHOW-KEYSTROKES PLAYGROUND & SHOWCASE STYLES
 * ==========================================================================
 */

.visualizer-stage {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: 150px;
  padding: 2.25rem 2rem;
  border-radius: 10px;
  border: 2px dashed var(--border-color);
  cursor: pointer;
  outline: none;
  transition: background-color 0.2s ease, border-color 0.2s ease, box-shadow 0.2s ease;
}

.visualizer-stage:hover {
  border-color: var(--primary-color);
}

.visualizer-stage:focus,
.visualizer-stage:focus-visible {
  border-style: solid;
  border-color: var(--primary-color);
  box-shadow: 0 0 0 3px rgb(37 99 235 / 0.2);
}

.visualizer-stage[data-stage-scheme="light"] {
  background-color: #f4f4f6;
  border-color: #d2d2d7;
  color: #52525b;
}

.visualizer-stage[data-stage-scheme="light"]:focus,
.visualizer-stage[data-stage-scheme="light"]:focus-visible {
  border-color: #2563eb;
}

.visualizer-stage[data-stage-scheme="dark"] {
  background-color: #09090b;
  border-color: #27272a;
  color: #a1a1aa;
}

.visualizer-stage[data-stage-scheme="dark"]:focus,
.visualizer-stage[data-stage-scheme="dark"]:focus-visible {
  border-color: #60a5fa;
}

.stage-capture-badge {
  position: absolute;
  top: 0.65rem;
  right: 0.75rem;
  font-size: 0.72rem;
  font-weight: 600;
  padding: 0.2rem 0.55rem;
  border-radius: 999px;
  background: rgb(0 0 0 / 0.06);
  color: inherit;
  pointer-events: none;
  transition: background-color 0.15s ease, color 0.15s ease;
}

.visualizer-stage[data-stage-scheme="dark"] .stage-capture-badge {
  background: rgb(255 255 255 / 0.1);
}

.visualizer-stage:focus .stage-capture-badge,
.visualizer-stage:focus-visible .stage-capture-badge {
  background: #2563eb;
  color: #ffffff;
}

.stage-prompt {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: 0.35rem;
  pointer-events: none;
}

.stage-prompt-main {
  font-size: 0.925rem;
  font-weight: 500;
}

.stage-prompt-sub {
  font-size: 0.8rem;
  opacity: 0.8;
}

.visualizer-stage[data-stage-scheme="light"] .stage-prompt code {
  background: #e4e4e7;
  color: #18181b;
}

.visualizer-stage[data-stage-scheme="dark"] .stage-prompt code {
  background: #27272a;
  color: #e4e4e7;
}

/* Hide the stage prompt when the normal-flow <show-keystrokes> is actively displaying keys */
.visualizer-stage:has(show-keystrokes[active][position="normal" i]) .stage-prompt {
  display: none;
}

.controls-section,
.code-section {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
  padding-top: 1.25rem;
  border-top: 1px solid var(--border-color);
}

.code-section {
  gap: 0.75rem;
}

.controls-title {
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-color);
  margin: 0;
}

.controls-category {
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
}

.controls-subtitle {
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-muted);
  margin: 0;
}

.controls-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1rem;
}

@media (max-width: 720px) {
  .controls-grid {
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  }
}

.control-group {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}

.control-group label {
  font-size: 0.825rem;
  font-weight: 600;
  color: var(--text-muted);
}

.control-group select,
.control-group input[type="number"] {
  padding: 0.5rem 0.65rem;
  border-radius: 8px;
  border: 1px solid var(--border-color);
  background: var(--bg-surface-elevated);
  color: var(--text-color);
  font-family: var(--font-sans);
  font-size: 0.875rem;
  transition: border-color 0.15s ease, background-color 0.15s ease, box-shadow 0.15s ease;
}

.control-group select:hover,
.control-group input[type="number"]:hover {
  border-color: var(--primary-color);
  background: var(--bg-surface);
}

.control-group select:focus-visible,
.control-group select:open,
.control-group input[type="number"]:focus-visible {
  outline: none;
  border-color: var(--primary-color);
  background: var(--bg-surface);
  box-shadow: 0 0 0 3px rgb(37 99 235 / 0.2);
}

/* Customizable Select (appearance: base-select) */
select,
::picker(select) {
  appearance: base-select;
}

select {
  cursor: pointer;
  align-items: center;
  min-width: 0;
}

select selectedcontent {
  min-width: 0;
  flex: 1;
  white-space: nowrap;
  overflow: clip;
  text-overflow: ellipsis;
}

select::picker-icon {
  color: var(--text-muted);
  transition: rotate 0.2s ease, color 0.15s ease;
}

select:hover::picker-icon,
select:open::picker-icon {
  color: var(--primary-color);
}

select:open::picker-icon {
  rotate: 180deg;
}

::picker(select) {
  margin-block: 0.35rem;
  padding: 0.35rem;
  border: 1px solid var(--border-color);
  border-radius: 10px;
  background: var(--bg-surface);
  color: var(--text-color);
  font-family: var(--font-sans);
  font-size: 0.875rem;
  box-shadow: var(--card-shadow-lg);
}

select option {
  padding: 0.45rem 0.65rem;
  border-radius: 6px;
  color: var(--text-color);
  font-family: var(--font-sans);
  font-size: 0.875rem;
  cursor: pointer;
  transition: background-color 0.12s ease, color 0.12s ease;
}

select option + option {
  margin-top: 0.125rem;
}

select option:hover,
select option:focus-visible {
  outline: none;
  background: var(--bg-surface-elevated);
  color: var(--text-color);
}

select option:checked {
  background: rgb(37 99 235 / 0.08);
  color: var(--primary-color);
  font-weight: 600;
}

select option::checkmark {
  color: var(--primary-color);
  font-weight: 700;
}

/* Custom Properties Interactive Styler Controls */
.custom-props-card .controls-grid {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

@media (max-width: 1180px) {
  .custom-props-card .controls-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (max-width: 900px) {
  .custom-props-card .controls-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 560px) {
  .custom-props-card .controls-grid {
    grid-template-columns: minmax(0, 1fr);
  }
}

.custom-props-card .control-group label code {
  display: inline-block;
  max-width: 100%;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  vertical-align: bottom;
}

.control-hint {
  font-size: 0.75rem;
  line-height: 1.35;
  color: var(--text-muted);
}

.control-hint code {
  font-size: 0.7rem;
}

.custom-props-stage {
  cursor: default;
  border-style: solid;
  min-height: 130px;
}

.custom-props-stage:hover {
  border-color: #d2d2d7;
}

.card-header-actions {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.btn-reset-props {
  padding: 0.35rem 0.75rem;
  border-radius: 6px;
  border: 1px solid var(--border-color);
  background: var(--bg-surface-elevated);
  color: var(--text-color);
  font-family: var(--font-sans);
  font-size: 0.8125rem;
  font-weight: 600;
  cursor: pointer;
  transition: border-color 0.15s ease, background-color 0.15s ease, color 0.15s ease;
}

.btn-reset-props:hover {
  border-color: var(--primary-color);
  color: var(--primary-color);
  background: var(--bg-surface);
}

.input-with-unit {
  display: flex;
  align-items: stretch;
  gap: 0.35rem;
  min-width: 0;
}

.input-with-unit input[type="number"] {
  flex: 1;
  min-width: 0;
}

.input-with-unit .unit-select {
  flex-shrink: 0;
  padding-inline: 0.5rem;
  font-family: var(--font-mono);
  font-size: 0.8125rem;
}

.border-control-row {
  display: flex;
  align-items: stretch;
  gap: 0.35rem;
  min-width: 0;
}

.border-control-row .input-with-unit {
  flex: 1;
}

.color-control {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.325rem 0.65rem 0.325rem 0.4rem;
  border-radius: 8px;
  border: 1px solid var(--border-color);
  background: var(--bg-surface-elevated);
  min-height: 37px;
  transition: border-color 0.15s ease, background-color 0.15s ease;
}

.color-control:hover {
  border-color: var(--primary-color);
  background: var(--bg-surface);
}

.color-control.is-customized {
  border-color: var(--primary-color);
  background: var(--bg-surface);
}

.color-control-compact {
  padding: 0.325rem 0.4rem;
  flex-shrink: 0;
}

.color-control input[type="color"] {
  appearance: none;
  -webkit-appearance: none;
  width: 24px;
  height: 24px;
  padding: 0;
  border: 1px solid rgba(15, 23, 42, 0.18);
  border-radius: 5px;
  background: none;
  cursor: pointer;
  flex-shrink: 0;
}

.color-control input[type="color"]::-webkit-color-swatch-wrapper {
  padding: 0;
}

.color-control input[type="color"]::-webkit-color-swatch {
  border: none;
  border-radius: 4px;
}

.color-control input[type="color"]::-moz-color-swatch {
  border: none;
  border-radius: 4px;
}

.color-hex {
  font-size: 0.8rem;
  background: transparent;
  padding: 0;
  color: var(--text-muted);
}

.color-control.is-customized .color-hex {
  color: var(--text-color);
  font-weight: 600;
}

.showcase-row {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 1.25rem;
}

.showcase-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 0.85rem;
  padding: 1.25rem;
  border-radius: 10px;
  background: #f4f4f6;
  border: 1px solid #e4e4e7;
}

.showcase-caption {
  font-size: 0.8rem;
  font-weight: 600;
  color: #52525b;
}

.themes-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 1.5rem;
}

.theme-panel {
  border-radius: 12px;
  padding: 1.5rem;
  border: 1px solid var(--border-color);
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.theme-panel-light {
  background-color: #f4f4f6;
  color: #18181b;
  border-color: #d4d4d8;
}

.theme-panel-light code {
  background-color: #e4e4e7;
  color: #18181b;
}

.theme-panel-dark {
  background-color: #09090b;
  color: #f4f4f5;
  border-color: #27272a;
}

.theme-panel-dark code {
  background-color: #18181b;
  color: #e4e4e7;
}

.theme-panel-header {
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
}

.theme-badge {
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  opacity: 0.75;
}

.theme-panel-desc {
  font-size: 0.875rem;
  opacity: 0.85;
}

.theme-samples {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 1rem;
  padding-top: 0.5rem;
}

/* Custom ::part() Demos */
show-keystrokes.custom-neon::part(key) {
  background: #0f172a;
  color: #38bdf8;
  border: 1px solid #0284c7;
  box-shadow: 0 0 12px rgba(56, 189, 248, 0.35), 0 2px 0 #0369a1;
}

show-keystrokes.custom-neon::part(modifier) {
  color: #f472b6;
  border-color: #db2777;
  box-shadow: 0 0 12px rgba(244, 114, 182, 0.35), 0 2px 0 #9d174d;
}

show-keystrokes.custom-pill::part(key) {
  border-radius: 999px;
  background: linear-gradient(135deg, #6366f1, #8b5cf6);
  color: #ffffff;
  border: none;
  padding: 0 1rem;
  box-shadow: 0 4px 10px rgba(99, 102, 241, 0.35);
}

footer {
  margin-top: 4rem;
  padding-top: 2rem;
  border-top: 1px solid var(--border-color);
  text-align: center;
  color: var(--text-muted);
  font-size: 0.875rem;
}