/* ============================================================
   Focusgroup Demos — Shared Stylesheet
   ============================================================ */

/* ----- Reset & Base ----- */
* {
  box-sizing: border-box;
}

html,
input,
textarea,
button {
  -moz-osx-font-smoothing: grayscale;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  -webkit-text-size-adjust: 100%;
  -moz-text-size-adjust: 100%;
  text-size-adjust: 100%;
  font-size: 16px;
  font-family: Segoe UI, SegoeUI, Helvetica Neue, Helvetica, Arial, sans-serif;
  font-weight: 400;
}

html {
  min-height: 100vh;
}

/* ----- CSS Custom Properties (Light theme) ----- */
:root {
  --bg: #f9fafb;
  --bg-card: #ffffff;
  --text: #1f2937;
  --text-muted: #6b7280;
  --border: #e5e7eb;
  --accent: #2563eb;
  --accent-light: #dbeafe;
  --focus-color: #f59e0b;
  --focus-color-managed: #f59e0b;
  --focus-color-unmanaged: #9ca3af;
  --success: #10b981;
  --warning-bg: #fef3c7;
  --warning-border: #f59e0b;
  --warning-text: #92400e;
  --code-bg: #f3f4f6;
  --selected-bg: #2563eb;
  --selected-text: #ffffff;
  --hover-bg: #f3f4f6;
  --shadow: 0 1px 3px rgba(0, 0, 0, 0.1), 0 1px 2px rgba(0, 0, 0, 0.06);
  --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.07), 0 2px 4px rgba(0, 0, 0, 0.06);
  --radius: 8px;
}

/* ----- Dark theme ----- */
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #111827;
    --bg-card: #1f2937;
    --text: #f3f4f6;
    --text-muted: #9ca3af;
    --border: #374151;
    --accent: #60a5fa;
    --accent-light: #1e3a5f;
    --focus-color: #fbbf24;
    --focus-color-managed: #fbbf24;
    --focus-color-unmanaged: #6b7280;
    --success: #34d399;
    --warning-bg: #422006;
    --warning-border: #d97706;
    --warning-text: #fde68a;
    --code-bg: #374151;
    --selected-bg: #3b82f6;
    --selected-text: #ffffff;
    --hover-bg: #374151;
    --shadow: 0 1px 3px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.3);
  }
}

/* ----- Body ----- */
body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
}

/* ----- Layout ----- */
.page-header {
  background: var(--bg-card);
  border-bottom: 1px solid var(--border);
  padding: 1.5rem 2rem;
  box-shadow: var(--shadow);
}

.page-header h1 {
  margin: 0 0 0.25rem;
  font-size: 1.75rem;
  font-weight: 700;
}

.page-header p {
  margin: 0;
  color: var(--text-muted);
}

.page-header nav {
  margin-top: 0.75rem;
}

.page-header nav a {
  color: var(--accent);
  text-decoration: none;
  margin-right: 1rem;
  font-size: 0.9rem;
}

.page-header nav a:hover {
  text-decoration: underline;
}

.page-content {
  max-width: 960px;
  margin: 0 auto;
  padding: 2rem;
}

/* ----- Warning Banner ----- */
.warning-banner {
  background: var(--warning-bg);
  border: 1px solid var(--warning-border);
  color: var(--warning-text);
  padding: 1rem 1.25rem;
  border-radius: var(--radius);
  margin-bottom: 1.5rem;
  font-size: 0.95rem;
  line-height: 1.5;
}

.warning-banner strong {
  display: block;
  margin-bottom: 0.25rem;
}

.warning-banner a {
  color: inherit;
  font-weight: 600;
}

/* ----- Demo Section ----- */
.demo-section {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.5rem;
  margin-bottom: 2rem;
  box-shadow: var(--shadow);
}

.demo-section h2 {
  margin: 0 0 0.25rem;
  font-size: 1.35rem;
  font-weight: 600;
}

.demo-section h3 {
  margin: 1.25rem 0 0.5rem;
  font-size: 1.1rem;
  font-weight: 600;
}

.demo-section > p {
  color: var(--text-muted);
  margin: 0.25rem 0 1rem;
  font-size: 0.95rem;
}

.attr-label {
  display: inline-block;
  background: var(--code-bg);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 0.15rem 0.5rem;
  font-family: Consolas, Monaco, "Courier New", monospace;
  font-size: 0.85rem;
  color: var(--accent);
  margin-bottom: 0.75rem;
}

.try-it {
  background: var(--accent-light);
  border-radius: 4px;
  padding: 0.5rem 0.75rem;
  margin-bottom: 1rem;
  font-size: 0.9rem;
}

.try-it kbd {
  display: inline-block;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 3px;
  padding: 0.1rem 0.4rem;
  font-family: Consolas, Monaco, "Courier New", monospace;
  font-size: 0.85rem;
  box-shadow: 0 1px 0 var(--border);
}

.notice-list {
  padding-left: 1.25rem;
  font-size: 0.9rem;
  color: var(--text-muted);
}

.notice-list li {
  margin-bottom: 0.3rem;
}

/* ----- Demo Container (the interactive area) ----- */
.demo-container {
  border: 2px dashed var(--border);
  border-radius: var(--radius);
  padding: 1.25rem;
  margin: 1rem 0;
  background: var(--bg);
}

/* ----- Focus Ring ----- */
/* Default: unmanaged (outside any focusgroup) */
:focus {
  outline: 2px solid var(--focus-color-unmanaged);
  outline-offset: 2px;
}

:focus-visible {
  outline: 2px solid var(--focus-color-unmanaged);
  outline-offset: 2px;
}

/* Inside an active focusgroup (not opted out): managed focus ring */
[focusgroup]:not([focusgroup="none"]) :focus {
  outline-color: var(--focus-color-managed);
}

[focusgroup]:not([focusgroup="none"]) :focus-visible {
  outline-color: var(--focus-color-managed);
}

/* ----- Source Code Block ----- */
.source-code {
  position: relative;
  margin-top: 1rem;
}

.source-code summary {
  cursor: pointer;
  font-weight: 600;
  font-size: 0.9rem;
  color: var(--text-muted);
  user-select: none;
  padding: 0.25rem 0;
}

.source-code pre {
  background: var(--code-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1rem;
  overflow-x: auto;
  font-size: 0.85rem;
  line-height: 1.5;
  margin: 0.5rem 0 0;
}

.source-code code {
  font-family: Consolas, Monaco, "Courier New", monospace;
}

/* ----- Buttons (common) ----- */
.demo-container button {
  padding: 0.5rem 1rem;
  border: 1px solid var(--border);
  border-radius: 4px;
  background: var(--bg-card);
  color: var(--text);
  cursor: pointer;
  font-size: 0.9rem;
  transition: background 0.15s, box-shadow 0.15s;
}

.demo-container button:hover {
  background: var(--hover-bg);
}

.demo-container button.active {
  background: var(--selected-bg);
  color: var(--selected-text);
  border-color: var(--selected-bg);
}

/* ----- Toolbar Layout ----- */
.toolbar-horizontal {
  display: flex;
  gap: 0.35rem;
  align-items: center;
  flex-wrap: wrap;
}

.toolbar-vertical {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
  width: fit-content;
}

/* ----- Nested toolbar marker ----- */
.nested-toolbar {
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 0.25rem;
  display: flex;
  gap: 0.35rem;
  background: var(--hover-bg);
}

/* ----- Tab Control ----- */
.tablist {
  display: flex;
  gap: 0;
  border-bottom: 2px solid var(--border);
}

.tablist-vertical {
  display: flex;
  flex-direction: column;
  gap: 0;
  border-right: 2px solid var(--border);
  width: fit-content;
}

.tablist .tab,
.tablist-vertical .tab {
  border: none;
  border-radius: 0;
  background: transparent;
  padding: 0.65rem 1.25rem;
  font-weight: 500;
  color: var(--text-muted);
  position: relative;
}

.tablist .tab.selected {
  color: var(--accent);
  border-bottom: 2px solid var(--accent);
  margin-bottom: -2px;
}

.tablist-vertical .tab.selected {
  color: var(--accent);
  border-right: 2px solid var(--accent);
  margin-right: -2px;
}

.tabpanel {
  padding: 1rem;
  border: 1px solid var(--border);
  border-top: none;
  border-radius: 0 0 var(--radius) var(--radius);
  min-height: 80px;
}

.tab-wrapper-vertical {
  display: flex;
  gap: 0;
}

.tab-wrapper-vertical .tabpanel {
  border-top: 1px solid var(--border);
  border-left: none;
  border-radius: 0 var(--radius) var(--radius) 0;
  flex: 1;
}

.tabpanel-scrollable {
  max-height: 12rem;
  overflow: auto;
  scroll-behavior: smooth;
}

/* ----- Menu ----- */
.menu-vertical {
  display: flex;
  flex-direction: column;
  width: 200px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--bg-card);
  padding: 0.25rem 0;
}

.menu-vertical > .menu-item {
  padding: 0.5rem 1rem;
  cursor: pointer;
  font-size: 0.9rem;
  color: var(--text);
  border: none;
  background: none;
  text-align: left;
}

.menu-vertical > .menu-item:hover,
.menu-vertical > .menu-item:focus-visible {
  background: var(--hover-bg);
}

.menu-vertical > .menu-item:focus {
  outline: 2px solid var(--focus-color-managed);
  outline-offset: -2px;
}

/* ----- Menubar ----- */
.menubar {
  display: flex;
  list-style: none;
  margin: 0;
  padding: 0;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
}

.menubar > li {
  position: relative;
}

.menubar > li > .menubar-item {
  border: none;
  background: transparent;
  padding: 0.6rem 1.1rem;
  cursor: pointer;
  font-size: 0.9rem;
  color: var(--text);
  border-radius: var(--radius);
}

.menubar > li > .menubar-item:hover {
  background: var(--hover-bg);
}

.submenu {
  list-style: none;
  margin: 0;
  padding: 0.25rem 0;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--bg-card);
  box-shadow: var(--shadow-md);
  min-width: 160px;
}

.submenu[popover] {
  position: absolute;
  inset: unset;
  margin: 0;
  top: anchor(bottom);
  left: anchor(left);
}

.submenu li {
  list-style: none;
}

.submenu .submenu-item {
  display: block;
  width: 100%;
  padding: 0.45rem 1rem;
  border: none;
  background: transparent;
  text-align: left;
  text-decoration: none;
  color: var(--text);
  font-size: 0.9rem;
  cursor: pointer;
}

.submenu .submenu-item:hover,
.submenu .submenu-item:focus-visible {
  background: var(--hover-bg);
}

.submenu .submenu-item:focus {
  outline: 2px solid var(--focus-color-managed);
  outline-offset: -2px;
}

/* ----- Radio Group ----- */
.radio-group {
  display: flex;
  gap: 0.35rem;
}

.radio-group-column {
  flex-direction: column;
  width: fit-content;
}

.radio-option {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.45rem 0.9rem;
  border: 2px solid var(--border);
  border-radius: 4px;
  cursor: pointer;
  font-size: 0.9rem;
  transition: background 0.15s, border-color 0.15s;
  user-select: none;
}

.radio-option::before {
  content: "";
  display: inline-block;
  width: 14px;
  height: 14px;
  border: 2px solid var(--border);
  border-radius: 50%;
  transition: border-color 0.15s, background 0.15s;
}

.radio-option.checked {
  border-color: var(--accent);
  background: var(--accent-light);
}

.radio-option.checked::before {
  border-color: var(--accent);
  background: var(--accent);
  box-shadow: inset 0 0 0 2px var(--bg-card);
}

.radio-option:hover {
  background: var(--hover-bg);
}

/* ----- Listbox ----- */
.listbox {
  display: flex;
  flex-direction: column;
  width: 240px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--bg-card);
  padding: 0.25rem 0;
}

.listbox-option {
  padding: 0.5rem 1rem;
  cursor: pointer;
  font-size: 0.9rem;
  transition: background 0.15s;
}

.listbox-option:hover {
  background: var(--hover-bg);
}

.listbox-option:focus {
  outline: 2px solid var(--focus-color-managed);
  outline-offset: -2px;
}

.listbox-option.selected {
  background: var(--selected-bg);
  color: var(--selected-text);
}

/* ----- Accordion ----- */
.accordion {
  border: 1px solid var(--border);
  border-radius: var(--radius);
}

.accordion h3:first-of-type button {
  border-radius: var(--radius) var(--radius) 0 0;
}

.accordion h3:last-of-type button {
  border-radius: 0 0 var(--radius) var(--radius);
}

.accordion h3 {
  margin: 0;
}

.accordion h3 button {
  display: flex;
  align-items: center;
  width: 100%;
  padding: 0.85rem 1rem;
  border: none;
  border-bottom: 1px solid var(--border);
  background: var(--bg-card);
  color: var(--text);
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  text-align: left;
  gap: 0.5rem;
  border-radius: 0;
}

.accordion h3 button:hover {
  background: var(--hover-bg);
}

.accordion h3 button::before {
  content: "▶";
  font-size: 0.7rem;
  transition: transform 0.2s;
}

.accordion h3 button.expanded::before {
  transform: rotate(90deg);
}

.accordion .panel {
  padding: 1rem;
  border-bottom: 1px solid var(--border);
}

.accordion .panel:last-child,
.accordion h3:last-of-type button {
  border-bottom: none;
}

.panel-scrollable {
  max-height: 10rem;
  overflow: auto;
  scroll-behavior: smooth;
}

.panel-scrollable:focus {
  outline: 2px solid var(--focus-color-unmanaged);
  outline-offset: -2px;
}

/* ----- Card Grid (index page) ----- */
.card-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1rem;
  margin: 1.5rem 0;
  list-style: none;
  padding: 0;
}

.card-link {
  display: block;
  text-decoration: none;
  color: var(--text);
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.25rem;
  box-shadow: var(--shadow);
  transition: box-shadow 0.2s, transform 0.15s;
}

.card-link:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

.card-link h3 {
  margin: 0 0 0.35rem;
  font-size: 1.1rem;
  color: var(--accent);
}

.card-link p {
  margin: 0 0 0.5rem;
  font-size: 0.9rem;
  color: var(--text-muted);
}

.card-link .attr-label {
  margin: 0;
}

/* ----- Side-by-side comparison ----- */
.comparison {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.5rem;
}

@media (max-width: 640px) {
  .comparison {
    grid-template-columns: 1fr;
  }
}

.comparison-column h3 {
  margin: 0 0 0.5rem;
  font-size: 1rem;
}

/* ----- Toggle switch ----- */
.toggle-switch {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  cursor: pointer;
  user-select: none;
  margin-bottom: 1rem;
  font-size: 0.95rem;
}

.toggle-switch input {
  position: absolute;
  opacity: 0;
  width: 0;
  height: 0;
}

.toggle-slider {
  position: relative;
  display: inline-block;
  width: 2.5rem;
  height: 1.4rem;
  background: var(--border);
  border-radius: 0.7rem;
  transition: background 0.2s;
  flex-shrink: 0;
}

.toggle-slider::after {
  content: "";
  position: absolute;
  top: 0.2rem;
  left: 0.2rem;
  width: 1rem;
  height: 1rem;
  background: #fff;
  border-radius: 50%;
  transition: transform 0.2s;
}

.toggle-switch input:checked + .toggle-slider {
  background: var(--accent);
}

.toggle-switch input:checked + .toggle-slider::after {
  transform: translateX(1.1rem);
}

.toggle-switch input:focus-visible + .toggle-slider {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

/* ----- Utility ----- */
.mt-1 { margin-top: 1rem; }
.mb-1 { margin-bottom: 1rem; }
.flex-row { display: flex; flex-direction: row; }
.gap-1 { gap: 1rem; }
.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;
}

/* ----- Responsive ----- */
@media (max-width: 640px) {
  .page-content {
    padding: 1rem;
  }

  .page-header {
    padding: 1rem;
  }
}