:root {
  color-scheme: light;
  --bg: #ffffff;
  --sidebar: #f6f8fc;
  --surface: #ffffff;
  --surface-subtle: #f8faff;
  --surface-selected: #eaf2ff;
  --text: #0b1530;
  --muted: #5d6b88;
  --faint: #8290aa;
  --border: #dbe3f0;
  --border-strong: #c7d2e4;
  --blue: #075de8;
  --blue-hover: #004dcc;
  --blue-soft: #eaf2ff;
  --green: #087c63;
  --green-soft: #edfbf6;
  --coral: #ff6838;
  --shadow: 0 14px 38px rgba(33, 55, 97, 0.07), 0 2px 8px rgba(33, 55, 97, 0.04);
  --font-ui: "DM Sans", "Segoe UI", sans-serif;
  --font-display: "DM Serif Display", Georgia, serif;
  --font-mono: "IBM Plex Mono", Consolas, monospace;
  --primary-nav-width: 244px;
  --secondary-nav-width: 268px;
}

:root[data-theme="dark"] {
  color-scheme: dark;
  --bg: #0c1220;
  --sidebar: #111929;
  --surface: #121b2c;
  --surface-subtle: #0e1727;
  --surface-selected: #172a4a;
  --text: #edf3ff;
  --muted: #a7b4cc;
  --faint: #8290aa;
  --border: #26334a;
  --border-strong: #35445f;
  --blue: #4f91ff;
  --blue-hover: #70a5ff;
  --blue-soft: #162a4d;
  --green: #42d2a9;
  --green-soft: #10302c;
  --shadow: 0 18px 48px rgba(0, 0, 0, 0.22);
}

* {
  box-sizing: border-box;
}

[hidden] {
  display: none !important;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-ui);
  font-size: 16px;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

button,
input,
select,
textarea {
  font: inherit;
}

button,
select {
  cursor: pointer;
}

button:focus-visible,
input:focus-visible,
select:focus-visible,
textarea:focus-visible,
a:focus-visible {
  outline: 3px solid color-mix(in srgb, var(--blue) 30%, transparent);
  outline-offset: 2px;
}

svg {
  width: 22px;
  height: 22px;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.8;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.app-shell {
  min-height: 100vh;
}

.sidebar {
  position: fixed;
  inset: 0 auto 0 0;
  z-index: 20;
  display: flex;
  width: var(--primary-nav-width);
  flex-direction: column;
  border-right: 1px solid var(--border);
  background: var(--sidebar);
  padding: 24px 16px 22px;
  transition: transform 200ms ease;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  width: fit-content;
  margin: 0 16px 30px;
  color: var(--text);
  font-family: var(--font-display);
  font-size: 25px;
  line-height: 1;
  text-decoration: none;
}

.brand-mark {
  position: relative;
  width: 31px;
  height: 29px;
}

.brand-mark::before,
.brand-mark::after {
  position: absolute;
  top: 3px;
  width: 10px;
  height: 21px;
  content: "";
  border: 3px solid var(--blue);
}

.brand-mark::before {
  left: 0;
  border-right: 0;
  border-radius: 4px 0 0 4px;
}

.brand-mark::after {
  right: 0;
  border-left: 0;
  border-color: var(--coral);
  border-radius: 0 4px 4px 0;
}

.brand-mark span:first-child,
.brand-mark span:last-child {
  position: absolute;
  z-index: 1;
  width: 9px;
  height: 3px;
  content: "";
  background: var(--blue);
  transform: rotate(30deg);
}

.brand-mark span:first-child {
  top: 6px;
  left: 10px;
}

.brand-mark span:last-child {
  right: 10px;
  bottom: 6px;
  background: var(--coral);
}

.category-nav {
  display: grid;
  gap: 6px;
}

.nav-item {
  position: relative;
  display: flex;
  align-items: center;
  gap: 13px;
  width: 100%;
  min-height: 47px;
  border: 0;
  border-radius: 9px;
  background: transparent;
  color: var(--text);
  padding: 0 15px;
  text-align: left;
  transition: background 160ms ease, color 160ms ease, transform 160ms ease;
}

.nav-item:hover {
  background: color-mix(in srgb, var(--surface-selected) 66%, transparent);
  transform: translateX(2px);
}

.nav-item.active {
  background: var(--surface-selected);
  color: var(--blue);
}

.nav-item.active::before {
  position: absolute;
  top: 11px;
  bottom: 11px;
  left: 0;
  width: 3px;
  border-radius: 3px;
  background: var(--blue);
  content: "";
}

.nav-item svg {
  flex: 0 0 auto;
  width: 21px;
  height: 21px;
}

.sidebar-note {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  margin: auto 14px 0;
  border-top: 1px solid var(--border-strong);
  color: var(--muted);
  padding-top: 21px;
  font-size: 13px;
  line-height: 1.45;
}

.sidebar-note svg {
  flex: 0 0 auto;
  width: 21px;
  color: var(--muted);
}

.subnav {
  position: fixed;
  inset: 0 auto 0 var(--primary-nav-width);
  z-index: 18;
  display: flex;
  width: var(--secondary-nav-width);
  flex-direction: column;
  border-right: 1px solid var(--border);
  background: var(--surface);
  box-shadow: 8px 0 24px rgba(33, 55, 97, 0.035);
  transition: left 200ms ease, transform 200ms ease;
}

.subnav-header {
  display: flex;
  min-height: 89px;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  border-bottom: 1px solid var(--border);
  padding: 19px 19px 17px;
}

.subnav-header span {
  display: block;
  margin-bottom: 2px;
  color: var(--blue);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.09em;
  text-transform: uppercase;
}

.subnav-header h2 {
  margin: 0;
  font-family: var(--font-display);
  font-size: 25px;
  font-weight: 400;
  line-height: 1.1;
}

.subnav-header .subnav-close-mobile {
  display: none;
}

.collapse-main-button {
  display: grid;
  grid-template-columns: 20px minmax(0, 1fr) 18px;
  min-height: 42px;
  align-items: center;
  gap: 9px;
  margin: 14px 14px 7px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--surface-subtle);
  color: var(--muted);
  padding: 0 10px;
  font-size: 12px;
  font-weight: 600;
  text-align: left;
}

.collapse-main-button:hover {
  border-color: var(--border-strong);
  color: var(--text);
}

.collapse-main-button svg {
  width: 18px;
  height: 18px;
}

.collapse-chevron {
  transition: transform 180ms ease;
}

.group-nav {
  min-height: 0;
  overflow-y: auto;
  padding: 9px 13px 24px;
}

.group-section + .group-section {
  margin-top: 12px;
  border-top: 1px solid var(--border);
  padding-top: 12px;
}

.group-toggle {
  display: flex;
  width: 100%;
  min-height: 35px;
  align-items: center;
  border-radius: 7px;
  background: transparent;
  color: var(--muted);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.group-toggle:hover,
.group-toggle:focus-within {
  background: var(--surface-subtle);
  color: var(--text);
}

.group-toggle.active {
  background: var(--surface-selected);
  color: var(--blue);
}

.group-label-button,
.group-expand-button {
  border: 0;
  background: transparent;
  color: inherit;
}

.group-label-button {
  display: flex;
  min-width: 0;
  min-height: 35px;
  flex: 1;
  align-items: center;
  padding: 0 0 0 8px;
  font: inherit;
  letter-spacing: inherit;
  text-transform: inherit;
  text-align: left;
}

.group-expand-button {
  display: grid;
  width: 35px;
  height: 35px;
  flex: 0 0 35px;
  place-items: center;
  border-radius: 7px;
}

.group-expand-button:hover {
  background: color-mix(in srgb, currentColor 9%, transparent);
}

.group-expand-button svg {
  width: 16px;
  height: 16px;
  transition: transform 160ms ease;
}

.group-expand-button[aria-expanded="false"] svg {
  transform: rotate(-90deg);
}

.group-count {
  margin-left: auto;
  margin-right: 2px;
  color: var(--faint);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0;
}

.group-items {
  display: grid;
  gap: 8px;
  margin-top: 3px;
}

.group-items[hidden] {
  display: none;
}

.term-subsection + .term-subsection {
  margin-top: 6px;
}

.term-subsection-label {
  margin: 9px 8px 4px 36px;
  color: var(--faint);
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.07em;
  text-transform: uppercase;
}

.group-term {
  position: relative;
  display: grid;
  grid-template-columns: 28px minmax(0, 1fr);
  min-height: 42px;
  align-items: center;
  gap: 8px;
  width: 100%;
  border: 0;
  border-radius: 8px;
  background: transparent;
  color: var(--muted);
  padding: 5px 8px;
  text-align: left;
}

.group-term:hover {
  background: var(--surface-subtle);
  color: var(--text);
}

.group-term.active {
  background: var(--surface-selected);
  color: var(--blue);
}

.group-term.active::before {
  position: absolute;
  inset: 9px auto 9px 0;
  width: 3px;
  border-radius: 3px;
  background: var(--blue);
  content: "";
}

.group-term svg {
  width: 18px;
  height: 18px;
}

.group-term span {
  overflow: hidden;
  color: inherit;
  font-size: 13px;
  font-weight: 500;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.sidebar-scrim {
  display: none;
}

.main-content {
  min-height: 100vh;
  margin-left: calc(var(--primary-nav-width) + var(--secondary-nav-width));
  transition: margin-left 200ms ease;
}

.app-shell.main-nav-collapsed .sidebar {
  transform: translateX(-100%);
}

.app-shell.main-nav-collapsed .subnav {
  left: 0;
}

.app-shell.main-nav-collapsed .main-content {
  margin-left: var(--secondary-nav-width);
}

.app-shell.main-nav-collapsed .collapse-chevron {
  transform: rotate(180deg);
}

.topbar {
  display: flex;
  min-height: 72px;
  align-items: center;
  justify-content: space-between;
  padding: 14px clamp(24px, 4vw, 64px) 0;
}

.mobile-nav-actions {
  display: none;
  align-items: center;
  gap: 4px;
}

.topbar-actions {
  display: flex;
  align-items: center;
  gap: 20px;
}

.icon-button {
  display: inline-grid;
  width: 42px;
  height: 42px;
  place-items: center;
  border: 0;
  border-radius: 10px;
  background: transparent;
  color: var(--text);
}

.icon-button:hover {
  background: var(--surface-selected);
}

.mobile-menu {
  display: none;
}

.primary-button,
.secondary-button {
  display: inline-flex;
  min-height: 43px;
  align-items: center;
  justify-content: center;
  gap: 9px;
  border-radius: 8px;
  padding: 0 17px;
  font-size: 15px;
  font-weight: 600;
  transition: background 160ms ease, transform 160ms ease, box-shadow 160ms ease;
}

.primary-button {
  border: 1px solid var(--blue);
  background: var(--blue);
  box-shadow: 0 6px 16px color-mix(in srgb, var(--blue) 18%, transparent);
  color: white;
}

.primary-button:hover {
  border-color: var(--blue-hover);
  background: var(--blue-hover);
  transform: translateY(-1px);
}

.secondary-button {
  border: 1px solid var(--border-strong);
  background: var(--surface);
  color: var(--text);
}

.secondary-button:hover {
  border-color: var(--blue);
  color: var(--blue);
}

.content-wrap {
  width: min(100% - 48px, 1150px);
  margin: 0 auto;
  padding: 0 0 54px;
}

.intro {
  margin: 4px 0 18px;
}

.intro h1 {
  max-width: 760px;
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(38px, 4vw, 52px);
  font-weight: 400;
  line-height: 1.08;
  letter-spacing: -0.025em;
}

.intro p {
  margin: 7px 0 0;
  color: var(--muted);
  font-size: 18px;
}

.search-wrap {
  position: relative;
  display: flex;
  height: 54px;
  align-items: center;
  border: 1.5px solid var(--blue);
  border-radius: 8px;
  background: var(--surface);
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--blue) 5%, transparent);
}

.search-wrap > svg {
  flex: 0 0 auto;
  margin-left: 16px;
  color: var(--muted);
}

.search-wrap input {
  width: 100%;
  height: 100%;
  border: 0;
  outline: 0;
  background: transparent;
  color: var(--text);
  padding: 0 15px;
  font-size: 16px;
}

.search-wrap input::placeholder {
  color: var(--faint);
}

.search-wrap kbd {
  margin-right: 12px;
  border: 1px solid var(--border);
  border-bottom-width: 2px;
  border-radius: 6px;
  background: var(--surface-subtle);
  color: var(--muted);
  padding: 3px 7px;
  font-family: var(--font-ui);
  font-size: 12px;
  white-space: nowrap;
}

.result-count {
  margin: 14px 0 11px;
  color: var(--text);
  font-size: 14px;
  font-weight: 500;
}

.group-overview[hidden] {
  display: none;
}

.group-overview {
  padding-top: 5px;
}

.group-overview-header {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 24px;
  margin-bottom: 30px;
  border-bottom: 1px solid var(--border);
  padding: 20px 2px 25px;
}

.group-overview-header h2 {
  margin: 4px 0 4px;
  font-family: var(--font-display);
  font-size: clamp(34px, 4vw, 46px);
  font-weight: 400;
  line-height: 1.08;
  letter-spacing: -0.02em;
}

.group-overview-header p {
  max-width: 650px;
  margin: 0;
  color: var(--muted);
  font-size: 15px;
}

.overview-count {
  flex: 0 0 auto;
  border-radius: 999px;
  background: var(--blue-soft);
  color: var(--blue);
  padding: 7px 12px;
  font-size: 12px;
  font-weight: 700;
  white-space: nowrap;
}

.group-overview-sections {
  display: grid;
  gap: 38px;
}

.overview-section-heading {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 12px;
}

.overview-section-heading h3 {
  margin: 0;
  font-size: 16px;
  font-weight: 700;
}

.overview-section-heading span {
  display: grid;
  min-width: 23px;
  height: 23px;
  place-items: center;
  border-radius: 999px;
  background: var(--surface-subtle);
  color: var(--muted);
  font-size: 11px;
  font-weight: 700;
}

.element-card-grid,
.concept-list {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 14px;
  border: 0;
}

.concept-card {
  display: flex;
  min-width: 0;
  min-height: 590px;
  flex-direction: column;
  gap: 17px;
  overflow: hidden;
  border: 1px solid var(--border);
  border-radius: 12px;
  background: var(--surface);
  box-shadow: 0 8px 20px rgba(33, 55, 97, 0.045);
  padding: 18px;
  transition: border-color 160ms ease, box-shadow 160ms ease, transform 160ms ease;
}

.concept-card:hover {
  border-color: color-mix(in srgb, var(--blue) 38%, var(--border));
  box-shadow: 0 14px 30px rgba(32, 59, 105, 0.09);
  transform: translateY(-2px);
}

.concept-card-header h4 {
  margin: 5px 0 3px;
  font-family: var(--font-display);
  font-size: 23px;
  font-weight: 400;
  line-height: 1.08;
  letter-spacing: -0.015em;
}

.concept-card-header p {
  display: -webkit-box;
  min-height: 38px;
  margin: 0;
  overflow: hidden;
  color: var(--muted);
  font-size: 12px;
  line-height: 1.5;
  -webkit-box-orient: vertical;
  -webkit-line-clamp: 2;
}

.concept-card-section h5 {
  margin: 0 0 7px;
  color: var(--text);
  font-size: 11px;
  font-weight: 700;
}

.concept-card-preview {
  position: relative;
  display: grid;
  height: 182px;
  place-items: center;
  overflow: hidden;
  border: 1px solid var(--border);
  background: var(--surface-subtle);
  padding: 17px 13px;
}

.concept-card-preview::before,
.concept-card-preview::after {
  position: absolute;
  width: 10px;
  height: calc(100% + 2px);
  border-top: 2px solid var(--blue);
  border-bottom: 2px solid var(--blue);
  content: "";
  pointer-events: none;
}

.concept-card-preview::before {
  left: -1px;
  border-left: 2px solid var(--blue);
}

.concept-card-preview::after {
  right: -1px;
  border-right: 2px solid var(--blue);
}

.concept-card-preview .demo-control,
.concept-card-preview .demo-choice,
.concept-card-preview .rating-demo,
.concept-card-preview .segmented-demo,
.concept-card-preview .transfer-demo,
.concept-card-preview .state-pair,
.concept-card-preview .calculation-demo,
.concept-card-preview .steps-demo,
.concept-card-preview .hidden-demo,
.concept-card-preview .anatomy-demo {
  width: 100%;
  max-width: 100%;
}

.concept-card-preview .demo-control label,
.concept-card-preview .demo-label,
.concept-card-preview legend {
  font-size: 11px;
}

.concept-card-preview .demo-control small,
.concept-card-preview .single-choice,
.concept-card-preview .demo-choice label {
  font-size: 9px;
}

.concept-card-preview .demo-control select,
.concept-card-preview .demo-control input:not([type="checkbox"]):not([type="radio"]):not([type="range"]):not([type="color"]):not([type="file"]),
.concept-card-preview .paired-fields input,
.concept-card-preview .state-pair input {
  min-width: 0;
  height: 35px;
  font-size: 10px;
}

.concept-card-preview .demo-affix,
.concept-card-preview button {
  font-size: 9px;
}

.concept-card-preview .otp-demo {
  grid-template-columns: repeat(6, minmax(0, 1fr));
  gap: 3px;
}

.concept-card-preview .otp-demo input {
  height: 34px;
  font-size: 11px;
}

.concept-card-preview .cascader-panel,
.concept-card-preview .transfer-demo,
.concept-card-preview .state-pair,
.concept-card-preview .paired-fields {
  grid-template-columns: 1fr;
}

.concept-card-preview .cascader-panel > div + div {
  border-top: 1px solid var(--border);
  border-left: 0;
}

.concept-card-preview .paired-fields > span {
  display: none;
}

.concept-card-preview .editor-toolbar {
  overflow-x: auto;
}

.concept-card-preview .editor-area {
  min-height: 45px;
  font-size: 9px;
}

.concept-card-preview .image-placeholder {
  width: 48px;
  height: 48px;
}

.concept-card-preview .demo-actions {
  align-items: stretch;
  flex-direction: column;
  width: 100%;
}

.concept-card-aliases > div {
  display: flex;
  min-height: 24px;
  flex-wrap: wrap;
  gap: 5px;
}

.concept-card-aliases .alias {
  padding: 3px 7px;
  font-size: 9px;
}

.concept-card-prompt {
  display: flex;
  flex: 1;
  flex-direction: column;
}

.concept-card-prompt > p {
  display: -webkit-box;
  min-height: 66px;
  margin: 0;
  overflow: hidden;
  color: var(--muted);
  font-family: var(--font-mono);
  font-size: 9.5px;
  line-height: 1.45;
  -webkit-box-orient: vertical;
  -webkit-line-clamp: 5;
}

.concept-card-actions {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  margin-top: auto;
  padding-top: 12px;
}

.card-copy-button,
.card-open-button {
  min-height: 34px;
  border-radius: 6px;
  padding: 0 10px;
  font-size: 10px;
  font-weight: 700;
}

.card-copy-button {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  border: 1px solid var(--blue);
  background: var(--blue);
  color: white;
}

.card-copy-button:hover {
  border-color: var(--blue-hover);
  background: var(--blue-hover);
}

.card-copy-button svg {
  width: 14px;
  height: 14px;
}

.card-open-button {
  border: 0;
  background: transparent;
  color: var(--blue);
  padding-inline: 4px;
}

.card-open-button:hover {
  text-decoration: underline;
}

.feature-panel {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1.05fr);
  border: 1px solid var(--border);
  border-radius: 12px;
  background: var(--surface);
  box-shadow: var(--shadow);
  padding: 24px 26px 25px;
}

.entry-overview {
  min-width: 0;
  padding-right: 34px;
}

.category-label {
  color: var(--blue);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.feature-panel h2 {
  margin: 2px 0 1px;
  font-family: var(--font-display);
  font-size: 30px;
  font-weight: 400;
  line-height: 1.18;
}

.entry-description {
  margin: 0 0 19px;
  color: var(--muted);
}

.feature-panel h3 {
  margin: 0 0 8px;
  font-size: 14px;
  font-weight: 700;
}

.preview-frame {
  position: relative;
  display: grid;
  min-height: 158px;
  place-items: center;
  border: 1px solid var(--border);
  background: var(--surface-subtle);
  padding: 26px 38px;
}

.preview-frame::before,
.preview-frame::after {
  position: absolute;
  width: 16px;
  height: calc(100% + 2px);
  border-top: 2px solid var(--blue);
  border-bottom: 2px solid var(--blue);
  content: "";
  pointer-events: none;
}

.preview-frame::before {
  left: -1px;
  border-left: 2px solid var(--blue);
}

.preview-frame::after {
  right: -1px;
  border-right: 2px solid var(--blue);
}

.demo-control {
  width: min(100%, 390px);
}

.demo-control label,
.demo-label {
  display: block;
  margin-bottom: 6px;
  color: var(--text);
  font-size: 14px;
  font-weight: 600;
}

.demo-control select,
.demo-control input[type="text"],
.demo-control input[type="date"],
.demo-control input[type="time"],
.demo-control input[type="number"],
.demo-control input[type="email"],
.demo-control input[type="password"],
.demo-control input[type="search"],
.demo-control input[type="tel"],
.demo-control input[type="url"],
.demo-control input[type="datetime-local"],
.demo-control input[type="month"],
.demo-control input[type="week"],
.demo-control textarea {
  width: 100%;
  border: 1px solid var(--border-strong);
  border-radius: 6px;
  background: var(--surface);
  color: var(--text);
  padding: 0 12px;
  font-size: 15px;
}

.demo-control select,
.demo-control input[type="text"],
.demo-control input[type="date"],
.demo-control input[type="time"],
.demo-control input[type="number"],
.demo-control input[type="email"],
.demo-control input[type="password"],
.demo-control input[type="search"],
.demo-control input[type="tel"],
.demo-control input[type="url"],
.demo-control input[type="datetime-local"],
.demo-control input[type="month"],
.demo-control input[type="week"] {
  height: 42px;
}

.demo-control textarea {
  min-height: 84px;
  padding-block: 10px;
  resize: vertical;
}

.demo-control small {
  display: block;
  margin-top: 4px;
  color: var(--muted);
  font-size: 12px;
}

.demo-input-wrap {
  position: relative;
  display: flex;
  align-items: stretch;
  width: 100%;
}

.demo-input-wrap > input {
  min-width: 0;
}

.demo-input-wrap.has-affix {
  overflow: hidden;
  border: 1px solid var(--border-strong);
  border-radius: 6px;
  background: var(--surface);
}

.demo-input-wrap.has-affix > input {
  height: 40px;
  border: 0;
  border-radius: 0;
}

.demo-affix {
  display: grid;
  place-items: center;
  flex: 0 0 auto;
  background: var(--surface-subtle);
  color: var(--muted);
  padding: 0 11px;
  font-size: 13px;
  white-space: nowrap;
}

.input-action {
  position: absolute;
  top: 1px;
  right: 1px;
  height: 40px;
  border: 0;
  background: transparent;
  color: var(--blue);
  padding: 0 11px;
  font-size: 13px;
  font-weight: 700;
}

.input-with-icon > svg {
  position: absolute;
  z-index: 1;
  top: 11px;
  left: 11px;
  width: 18px;
  height: 18px;
  color: var(--muted);
}

.demo-control .input-with-icon > input {
  padding-left: 38px;
  padding-right: 36px;
}

.token-field,
.multi-select-trigger,
.path-value {
  display: flex;
  min-height: 44px;
  align-items: center;
  gap: 6px;
  border: 1px solid var(--border-strong);
  border-radius: 6px;
  background: var(--surface);
  padding: 6px 9px;
}

.token-field {
  flex-wrap: wrap;
}

.token-field > span,
.mini-chip {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  border-radius: 5px;
  background: var(--blue-soft);
  color: var(--blue);
  padding: 4px 7px;
  font-size: 12px;
  font-weight: 650;
}

.token-field button {
  border: 0;
  background: transparent;
  color: inherit;
  padding: 0;
}

.token-field input {
  min-width: 110px;
  flex: 1;
  border: 0;
  outline: 0;
  background: transparent;
  color: var(--text);
  padding: 4px;
}

.rich-editor {
  border: 1px solid var(--border-strong);
  border-radius: 7px;
  background: var(--surface);
  padding: 10px;
}

.editor-toolbar {
  display: flex;
  gap: 3px;
  border-bottom: 1px solid var(--border);
  padding-bottom: 8px;
}

.editor-toolbar button,
.signature-actions button {
  border: 0;
  border-radius: 5px;
  background: var(--surface-subtle);
  color: var(--text);
  padding: 5px 8px;
  font-size: 12px;
}

.editor-area {
  min-height: 64px;
  padding: 11px 4px 4px;
  color: var(--muted);
  font-size: 13px;
}

.suggestion-popover,
.select-panel,
.tree-panel {
  display: grid;
  margin-top: 5px;
  border: 1px solid var(--border);
  border-radius: 7px;
  background: var(--surface);
  box-shadow: 0 8px 22px rgba(31, 50, 84, 0.1);
  padding: 5px;
}

.suggestion-popover button {
  display: flex;
  justify-content: space-between;
  border: 0;
  border-radius: 5px;
  background: transparent;
  color: var(--text);
  padding: 7px 9px;
  text-align: left;
  font-size: 13px;
}

.suggestion-popover button.selected {
  background: var(--surface-selected);
}

.suggestion-popover button span {
  color: var(--muted);
  font-size: 11px;
}

.autocomplete-list button {
  justify-content: flex-start;
  gap: 3px;
}

.autocomplete-list button span {
  margin-left: auto;
}

.single-choice {
  display: flex;
  width: min(100%, 390px);
  align-items: flex-start;
  gap: 10px;
  color: var(--text);
  font-size: 14px;
}

.single-choice input {
  width: 18px;
  height: 18px;
  margin-top: 2px;
  accent-color: var(--blue);
}

.single-choice strong,
.single-choice small {
  display: block;
}

.parent-choice span {
  margin-left: auto;
  color: var(--muted);
  font-size: 11px;
}

.child-choice {
  margin-left: 27px;
}

.mixed-checkbox {
  accent-color: var(--blue);
}

.mixed-mark {
  display: inline-grid;
  width: 15px;
  height: 15px;
  place-items: center;
  flex: 0 0 auto;
  border-radius: 3px;
  background: var(--blue);
  color: white;
  font-size: 12px;
  font-weight: 800;
  line-height: 1;
}

.segmented-demo {
  width: min(100%, 390px);
  margin: 0;
  border: 0;
  padding: 0;
}

.segmented-demo legend {
  margin-bottom: 7px;
  font-size: 14px;
  font-weight: 600;
}

.segmented-demo div {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  border: 1px solid var(--border-strong);
  border-radius: 7px;
  padding: 3px;
}

.segmented-demo button {
  border: 0;
  border-radius: 5px;
  background: transparent;
  color: var(--muted);
  padding: 7px 10px;
}

.segmented-demo button.active {
  background: var(--surface-selected);
  color: var(--blue);
  font-weight: 700;
}

.transfer-demo {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto minmax(0, 1fr);
  gap: 8px;
  width: min(100%, 440px);
}

.transfer-demo > div:not(.transfer-actions) {
  display: grid;
  gap: 4px;
  border: 1px solid var(--border);
  border-radius: 7px;
  padding: 8px;
}

.transfer-demo strong {
  margin-bottom: 3px;
  font-size: 12px;
}

.transfer-demo button,
.transfer-actions button {
  border: 0;
  border-radius: 5px;
  background: var(--surface-subtle);
  color: var(--muted);
  padding: 6px;
  text-align: left;
  font-size: 11px;
}

.transfer-demo button.selected {
  background: var(--surface-selected);
  color: var(--blue);
}

.transfer-actions {
  display: grid;
  align-content: center;
  gap: 5px;
}

.multi-select-trigger svg {
  width: 16px;
  margin-left: 4px;
}

.selection-count {
  margin-left: auto;
  color: var(--muted);
  font-size: 11px;
}

.select-panel label,
.tree-panel label {
  display: flex;
  align-items: center;
  gap: 8px;
  border-radius: 5px;
  padding: 6px 8px;
  color: var(--muted);
  font-size: 12px;
}

.select-panel label:hover,
.tree-panel label:hover {
  background: var(--surface-subtle);
}

.select-panel input,
.tree-panel input {
  accent-color: var(--blue);
}

.path-value {
  color: var(--text);
  font-size: 12px;
}

.path-value span {
  color: var(--faint);
}

.cascader-panel {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  margin-top: 5px;
  overflow: hidden;
  border: 1px solid var(--border);
  border-radius: 7px;
  background: var(--surface);
}

.cascader-panel > div {
  display: grid;
  align-content: start;
  gap: 2px;
  padding: 5px;
}

.cascader-panel > div + div {
  border-left: 1px solid var(--border);
}

.cascader-panel button,
.tree-panel button {
  border: 0;
  border-radius: 4px;
  background: transparent;
  color: var(--muted);
  padding: 6px;
  text-align: left;
  font-size: 11px;
}

.cascader-panel button.active {
  background: var(--surface-selected);
  color: var(--blue);
}

.tree-panel label.tree-child {
  padding-left: 38px;
}

.paired-fields {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto minmax(0, 1fr);
  align-items: end;
  gap: 8px;
}

.paired-fields label {
  color: var(--muted);
  font-size: 11px;
}

.paired-fields input {
  display: block;
  width: 100%;
  height: 40px;
  margin-top: 4px;
  border: 1px solid var(--border-strong);
  border-radius: 6px;
  background: var(--surface);
  color: var(--text);
  padding: 0 8px;
}

.stepper-demo {
  display: grid;
  grid-template-columns: 42px minmax(0, 1fr) 42px;
}

.stepper-demo button,
.stepper-demo input {
  height: 42px;
  border: 1px solid var(--border-strong);
  background: var(--surface);
  color: var(--text);
  text-align: center;
}

.stepper-demo button:first-child {
  border-radius: 6px 0 0 6px;
}

.stepper-demo button:last-child {
  border-radius: 0 6px 6px 0;
}

.stepper-demo input {
  width: 100%;
  border-inline: 0;
}

.range-values,
.counter-row {
  display: flex;
  justify-content: space-between;
  color: var(--muted);
  font-size: 11px;
}

.dual-range {
  position: relative;
  height: 26px;
}

.dual-range input {
  position: absolute;
  inset: 0;
  width: 100%;
  pointer-events: none;
  accent-color: var(--blue);
}

.dual-range input::-webkit-slider-thumb {
  pointer-events: auto;
}

.native-file {
  width: 100%;
  border: 1px solid var(--border-strong);
  border-radius: 6px;
  background: var(--surface);
  color: var(--muted);
  padding: 7px;
  font-size: 12px;
}

.native-file::file-selector-button {
  margin-right: 10px;
  border: 0;
  border-radius: 5px;
  background: var(--blue-soft);
  color: var(--blue);
  padding: 7px 10px;
  font-weight: 700;
}

.image-upload-demo {
  display: flex;
  align-items: center;
  gap: 13px;
}

.image-placeholder {
  display: grid;
  width: 68px;
  height: 68px;
  place-items: center;
  flex: 0 0 auto;
  border-radius: 50%;
  background: var(--blue-soft);
  color: var(--blue);
  font-weight: 750;
}

.image-upload-demo strong,
.image-upload-demo span {
  display: block;
}

.image-upload-demo span {
  margin: 2px 0 7px;
  color: var(--muted);
  font-size: 11px;
}

.image-upload-demo button {
  min-height: 32px;
  border-radius: 5px;
  padding: 0 10px;
  font-size: 12px;
}

.color-demo i {
  width: 44px;
  height: 28px;
  margin-left: auto;
  border-radius: 5px;
}

.signature-demo {
  min-height: 82px;
  border: 1px dashed var(--border-strong);
  border-radius: 7px;
  background: var(--surface);
  padding: 18px 24px 8px;
  text-align: center;
}

.signature-demo span {
  font-family: cursive;
  font-size: 24px;
  font-style: italic;
}

.signature-demo div {
  margin-top: 8px;
  border-top: 1px solid var(--border-strong);
}

.signature-actions {
  display: flex;
  justify-content: flex-end;
  gap: 5px;
  margin-top: 5px;
}

.action-hint,
.reset-demo span {
  align-self: center;
  color: var(--muted);
  font-size: 11px;
}

.reset-demo {
  display: flex;
  align-items: center;
  gap: 12px;
}

.anatomy-demo {
  position: relative;
  width: min(100%, 390px);
  padding-bottom: 28px;
}

.anatomy-demo label,
.anatomy-demo input {
  display: block;
  width: 100%;
}

.anatomy-demo label {
  margin-bottom: 6px;
  font-size: 14px;
  font-weight: 650;
}

.anatomy-demo label span {
  color: var(--muted);
  font-weight: 400;
}

.anatomy-demo input {
  height: 42px;
  border: 1px solid var(--border-strong);
  border-radius: 6px;
  background: var(--surface);
  color: var(--text);
  padding: 0 12px;
}

.anatomy-callout {
  position: absolute;
  right: 0;
  bottom: 0;
  color: var(--blue);
  font-size: 11px;
}

.helper-before {
  margin: -2px 0 6px;
}

.required-word {
  margin-left: 5px;
  color: var(--blue);
  font-size: 11px;
}

.counter-row small {
  margin-top: 5px;
}

.counter-row strong {
  margin-top: 5px;
  color: var(--text);
}

.error-summary-demo {
  display: grid;
  gap: 5px;
  width: min(100%, 390px);
  border-left: 4px solid #d83232;
  background: color-mix(in srgb, #d83232 7%, var(--surface));
  padding: 12px 14px;
}

.error-summary-demo strong {
  font-size: 14px;
}

.error-summary-demo a {
  color: var(--blue);
  font-size: 12px;
}

.danger-action {
  min-height: 42px;
  margin-left: auto;
  border: 0;
  background: transparent;
  color: #c62828;
  font-weight: 700;
}

.steps-demo {
  display: grid;
  grid-template-columns: auto minmax(24px, 1fr) auto minmax(24px, 1fr) auto;
  align-items: start;
  width: min(100%, 390px);
}

.steps-demo div {
  display: grid;
  justify-items: center;
  gap: 4px;
}

.steps-demo span {
  display: grid;
  width: 28px;
  height: 28px;
  place-items: center;
  border: 1px solid var(--border-strong);
  border-radius: 50%;
  color: var(--muted);
  font-size: 12px;
}

.steps-demo span.done,
.steps-demo span.active {
  border-color: var(--blue);
  background: var(--blue);
  color: white;
}

.steps-demo i {
  margin-top: 13px;
  border-top: 1px solid var(--border-strong);
}

.steps-demo small {
  color: var(--muted);
  font-size: 10px;
}

.conditional-panel {
  margin-top: 10px;
  border-left: 2px solid var(--blue);
  padding-left: 16px;
}

.state-pair {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
  width: min(100%, 440px);
}

.state-pair label {
  color: var(--text);
  font-size: 12px;
  font-weight: 650;
}

.state-pair input {
  width: 100%;
  height: 40px;
  margin-top: 5px;
  border: 1px solid var(--border-strong);
  border-radius: 6px;
  background: var(--surface-subtle);
  color: var(--muted);
  padding: 0 9px;
}

.state-pair small {
  display: block;
  margin-top: 4px;
  color: var(--muted);
  font-size: 10px;
  font-weight: 400;
}

.calculation-demo {
  display: grid;
  gap: 7px;
  width: min(100%, 390px);
}

.calculation-demo div,
.calculation-demo output {
  display: flex;
  justify-content: space-between;
  color: var(--muted);
  font-size: 12px;
}

.calculation-demo output {
  margin-top: 3px;
  border-top: 1px solid var(--border);
  color: var(--text);
  padding-top: 9px;
  font-size: 14px;
}

.hidden-demo {
  width: min(100%, 390px);
  border: 1px dashed var(--border-strong);
  border-radius: 7px;
  background: var(--surface);
  padding: 12px;
}

.hidden-demo > div {
  display: grid;
  grid-template-columns: auto 1fr;
  align-items: center;
  gap: 3px 9px;
}

.hidden-demo > div span {
  grid-row: 1 / 3;
  color: var(--faint);
  font-size: 25px;
}

.hidden-demo strong {
  font-size: 13px;
}

.hidden-demo code {
  color: var(--blue);
  font-size: 11px;
}

.hidden-demo small {
  display: block;
  margin-top: 8px;
  color: var(--muted);
  font-size: 10px;
}

.demo-choice,
.rating-demo {
  width: min(100%, 390px);
  margin: 0;
  border: 0;
  padding: 0;
}

.demo-choice legend,
.rating-demo legend {
  margin-bottom: 8px;
  font-size: 14px;
  font-weight: 600;
}

.demo-choice label {
  display: flex;
  align-items: center;
  gap: 9px;
  margin-top: 8px;
  color: var(--muted);
  font-size: 14px;
}

.demo-choice input {
  width: 17px;
  height: 17px;
  accent-color: var(--blue);
}

.range-demo input {
  width: 100%;
  accent-color: var(--blue);
}

.range-demo div {
  display: flex;
  justify-content: space-between;
  color: var(--muted);
  font-size: 11px;
}

.color-demo {
  display: flex;
  align-items: center;
  gap: 10px;
  min-height: 44px;
  border: 1px solid var(--border-strong);
  border-radius: 6px;
  background: var(--surface);
  padding: 6px 10px;
  color: var(--muted);
  font-family: var(--font-mono);
  font-size: 13px;
}

.color-demo input {
  width: 34px;
  height: 30px;
  border: 0;
  background: transparent;
  padding: 0;
}

.demo-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.demo-actions button {
  min-height: 42px;
  border-radius: 7px;
  padding: 0 17px;
  font-weight: 650;
}

.demo-primary {
  border: 1px solid var(--blue);
  background: var(--blue);
  color: white;
}

.demo-secondary {
  border: 1px solid var(--border-strong);
  background: var(--surface);
  color: var(--text);
}

.otp-demo {
  display: grid;
  grid-template-columns: repeat(6, minmax(0, 44px));
  gap: 7px;
}

.otp-demo input {
  width: 100%;
  height: 46px;
  border: 1px solid var(--border-strong);
  border-radius: 7px;
  background: var(--surface);
  color: var(--text);
  text-align: center;
  font-family: var(--font-mono);
  font-size: 18px;
}

.rating-demo div {
  display: flex;
  gap: 5px;
}

.rating-demo button {
  border: 0;
  background: transparent;
  color: #f5a623;
  padding: 0;
  font-size: 27px;
  line-height: 1;
}

.rating-demo button.empty {
  color: var(--border-strong);
}

.demo-control .demo-invalid {
  border-color: #d83232;
}

.demo-control .demo-error {
  color: #c62828;
  font-weight: 600;
}

.switch-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  border: 1px solid var(--border);
  border-radius: 9px;
  background: var(--surface);
  padding: 13px 15px;
}

.switch-copy strong,
.switch-copy span {
  display: block;
}

.switch-copy strong {
  font-size: 14px;
}

.switch-copy span {
  color: var(--muted);
  font-size: 12px;
}

.switch {
  position: relative;
  width: 42px;
  height: 24px;
}

.switch input {
  position: absolute;
  opacity: 0;
}

.switch span {
  position: absolute;
  inset: 0;
  border-radius: 20px;
  background: var(--border-strong);
  transition: background 160ms ease;
}

.switch span::after {
  position: absolute;
  top: 3px;
  left: 3px;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: white;
  box-shadow: 0 1px 4px rgba(0, 0, 0, 0.18);
  content: "";
  transition: transform 160ms ease;
}

.switch input:checked + span {
  background: var(--blue);
}

.switch input:checked + span::after {
  transform: translateX(18px);
}

.switch input:focus-visible + span {
  outline: 3px solid color-mix(in srgb, var(--blue) 28%, transparent);
  outline-offset: 2px;
}

.upload-demo {
  display: grid;
  min-height: 90px;
  place-items: center;
  border: 1px dashed var(--border-strong);
  border-radius: 8px;
  background: var(--surface);
  color: var(--muted);
  text-align: center;
}

.upload-demo svg {
  margin-bottom: 4px;
  color: var(--blue);
}

.upload-demo span {
  display: block;
  font-size: 13px;
}

.modal-demo {
  display: flex;
  align-items: center;
  gap: 14px;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: var(--surface);
  box-shadow: 0 8px 24px rgba(28, 43, 72, 0.1);
  padding: 14px 16px;
}

.modal-demo svg {
  color: var(--blue);
}

.modal-demo strong,
.modal-demo span {
  display: block;
}

.modal-demo span {
  color: var(--muted);
  font-size: 12px;
}

.code-demo {
  width: 100%;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--surface);
  color: var(--muted);
  padding: 13px;
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 1.6;
}

.code-demo strong {
  color: var(--blue);
  font-weight: 500;
}

.prompt-overview {
  display: flex;
  min-width: 0;
  flex-direction: column;
  border-left: 1px solid var(--border);
  padding-left: 39px;
}

.alias-list {
  display: flex;
  flex-wrap: wrap;
  gap: 7px;
}

.alias {
  border-radius: 999px;
  background: var(--blue-soft);
  color: var(--muted);
  padding: 4px 12px;
  font-size: 13px;
}

.prompt-section {
  margin-top: 26px;
}

.prompt-box {
  min-height: 132px;
  border: 1px solid var(--border-strong);
  border-radius: 7px;
  background: var(--surface-subtle);
  padding: 13px 13px 11px;
}

.prompt-box p {
  min-height: 54px;
  margin: 0 0 12px;
  color: var(--text);
  font-family: var(--font-mono);
  font-size: 13.5px;
  line-height: 1.55;
}

.copy-button {
  display: flex;
  width: fit-content;
  min-height: 39px;
  margin-left: auto;
  padding: 0 14px;
  font-size: 14px;
}

.copy-button svg {
  width: 18px;
}

.copy-status {
  display: flex;
  min-height: 42px;
  align-items: center;
  gap: 9px;
  margin-top: 9px;
  border: 1px solid color-mix(in srgb, var(--green) 25%, var(--border));
  border-radius: 7px;
  background: var(--green-soft);
  color: var(--green);
  padding: 0 12px;
  font-size: 13px;
  opacity: 0;
  transform: translateY(-4px);
  transition: opacity 180ms ease, transform 180ms ease;
}

.copy-status.visible {
  opacity: 1;
  transform: translateY(0);
}

.copy-status svg {
  width: 18px;
  height: 18px;
  fill: var(--green);
  color: white;
  stroke-width: 2.2;
}

.browse-section {
  margin-top: 24px;
}

.browse-heading {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 6px;
}

.browse-heading h2 {
  margin: 0;
  font-size: 16px;
}

.sort-control {
  display: flex;
  align-items: center;
  gap: 5px;
  color: var(--muted);
  font-size: 13px;
}

.sort-control select {
  border: 0;
  outline: 0;
  background: transparent;
  color: var(--text);
  font-size: 13px;
}

.concept-list {
  border: 0;
}

.concept-row {
  display: grid;
  grid-template-columns: 43px minmax(0, 1fr) 24px;
  min-height: 57px;
  align-items: center;
  width: 100%;
  border: 0;
  border-top: 1px solid var(--border);
  background: transparent;
  color: var(--text);
  padding: 6px 10px 6px 8px;
  text-align: left;
  transition: background 150ms ease, color 150ms ease;
}

.concept-row:hover,
.concept-row.selected {
  background: var(--surface-selected);
}

.concept-row.selected {
  border-radius: 8px;
  color: var(--blue);
}

.concept-icon {
  display: grid;
  width: 34px;
  height: 34px;
  place-items: center;
  border-radius: 8px;
  color: currentColor;
}

.concept-icon svg {
  width: 21px;
  height: 21px;
}

.concept-copy {
  min-width: 0;
}

.concept-copy strong,
.concept-copy span {
  display: block;
}

.concept-copy strong {
  color: var(--text);
  font-size: 14px;
  font-weight: 600;
}

.concept-copy span {
  overflow: hidden;
  color: var(--muted);
  font-size: 12.5px;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.row-arrow {
  color: var(--muted);
}

.row-arrow svg {
  width: 18px;
}

.empty-state {
  padding: 52px 20px;
  color: var(--muted);
  text-align: center;
}

.empty-state svg {
  width: 32px;
  height: 32px;
  color: var(--blue);
}

.empty-state h3 {
  margin: 10px 0 3px;
  color: var(--text);
}

.empty-state p {
  margin: 0 0 17px;
}

@media (max-width: 1280px) {
  .feature-panel {
    grid-template-columns: 1fr;
  }

  .entry-overview {
    padding-right: 0;
  }

  .prompt-overview {
    margin-top: 24px;
    border-top: 1px solid var(--border);
    border-left: 0;
    padding-top: 24px;
    padding-left: 0;
  }

  .prompt-section {
    margin-top: 20px;
  }
}

@media (max-width: 1100px) {
  .sidebar {
    width: min(84vw, 286px);
    transform: translateX(-102%);
    transition: transform 200ms ease;
  }

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

  .subnav {
    left: 0;
    z-index: 21;
    width: min(88vw, 320px);
    transform: translateX(-102%);
  }

  .subnav.open {
    transform: translateX(0);
  }

  .subnav-header .subnav-close-mobile {
    display: inline-grid;
  }

  .collapse-main-button {
    display: none;
  }

  .sidebar-scrim {
    position: fixed;
    inset: 0;
    z-index: 19;
    display: block;
    background: rgba(8, 16, 31, 0.42);
    opacity: 0;
    pointer-events: none;
    transition: opacity 200ms ease;
  }

  .sidebar-scrim.visible {
    opacity: 1;
    pointer-events: auto;
  }

  .main-content {
    margin-left: 0;
  }

  .app-shell.main-nav-collapsed .main-content {
    margin-left: 0;
  }

  .topbar {
    min-height: 67px;
    justify-content: space-between;
    border-bottom: 1px solid var(--border);
    padding: 10px 18px;
  }

  .mobile-menu {
    display: inline-grid;
  }

  .mobile-nav-actions {
    display: flex;
  }

  .topbar-actions {
    gap: 8px;
  }

  .content-wrap {
    width: min(100% - 32px, 640px);
    padding-top: 27px;
  }

  .intro h1 {
    font-size: clamp(34px, 10vw, 43px);
  }

  .intro p {
    max-width: 520px;
    font-size: 16px;
  }

  .search-wrap kbd {
    display: none;
  }

  .feature-panel {
    padding: 21px 18px;
  }

  .preview-frame {
    padding: 23px 24px;
  }

  .browse-heading {
    align-items: flex-start;
    gap: 12px;
  }

  .sort-control span {
    display: none;
  }

  .element-card-grid,
  .concept-list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 800px) {
  .element-card-grid,
  .concept-list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 480px) {
  .intro h1 {
    font-size: 36px;
  }

  .feature-panel h2 {
    font-size: 27px;
  }

  .group-overview-header {
    align-items: flex-start;
    flex-direction: column;
    gap: 14px;
    margin-bottom: 24px;
    padding-top: 13px;
  }

  .group-overview-header h2 {
    font-size: 34px;
  }

  .element-card-grid,
  .concept-list {
    grid-template-columns: 1fr;
  }

  .concept-card {
    min-height: 560px;
  }

  .preview-frame {
    min-height: 150px;
    padding: 21px 18px;
  }

  .cascader-panel {
    grid-template-columns: 1fr;
    max-height: 190px;
    overflow-y: auto;
  }

  .cascader-panel > div + div {
    border-top: 1px solid var(--border);
    border-left: 0;
  }

  .transfer-demo {
    grid-template-columns: 1fr;
  }

  .transfer-actions {
    grid-template-columns: 1fr 1fr;
  }

  .transfer-actions button:first-child {
    transform: rotate(90deg);
  }

  .transfer-actions button:last-child {
    transform: rotate(90deg);
  }

  .state-pair,
  .paired-fields {
    grid-template-columns: 1fr;
  }

  .paired-fields > span {
    display: none;
  }

  .otp-demo {
    gap: 4px;
  }

  .demo-actions .danger-action {
    width: 100%;
    margin-left: 0;
    text-align: left;
  }

  .prompt-box p {
    font-size: 12.5px;
  }

  .concept-row {
    grid-template-columns: 37px minmax(0, 1fr) 20px;
  }

}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    transition-duration: 0.01ms !important;
  }
}