*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  background: var(--tbr-color-canvas);
  scroll-behavior: smooth;
  scroll-padding-top: 5.5rem;
}

body {
  background: var(--tbr-color-canvas);
  color: var(--tbr-color-text);
  font-family: var(--tbr-font-sans);
  font-size: var(--tbr-font-size-300);
  line-height: var(--tbr-line-height-body);
  margin: 0;
  min-height: 100dvh;
  text-rendering: optimizeLegibility;
}

[hidden] {
  display: none !important;
}

.sr-only {
  border: 0;
  clip: rect(0 0 0 0);
  clip-path: inset(50%);
  height: 1px;
  margin: -1px;
  overflow: hidden;
  padding: 0;
  position: absolute;
  white-space: nowrap;
  width: 1px;
}

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

img,
svg {
  display: block;
  max-width: 100%;
}

a {
  color: var(--tbr-color-link);
  text-underline-offset: 0.18em;
}

a:hover {
  color: var(--tbr-color-link-hover);
}

a:focus-visible {
  outline: 2px solid var(--tbr-color-focus);
  outline-offset: 3px;
}

code,
pre {
  font-family: var(--tbr-font-mono);
}

.skip-link {
  background: var(--tbr-color-focus);
  border-radius: 0 0 var(--tbr-radius-md) 0;
  color: var(--tbr-navy-500);
  font-weight: 700;
  left: 0;
  padding: var(--tbr-space-3) var(--tbr-space-4);
  position: fixed;
  top: 0;
  transform: translateY(-120%);
  transition: transform var(--tbr-duration-fast) var(--tbr-ease-standard);
  z-index: 200;
}

.skip-link:focus {
  transform: translateY(0);
}

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

.sidebar {
  background: var(--tbr-navy-950);
  color: #fff;
  display: flex;
  flex-direction: column;
  inset: 0 auto 0 0;
  overflow-y: auto;
  position: fixed;
  width: 17rem;
  z-index: var(--tbr-z-overlay);
}

.sidebar__brand {
  border-bottom: 1px solid rgb(255 255 255 / 12%);
  padding: var(--tbr-space-6);
  position: relative;
}

.brand-plate {
  align-items: center;
  background: #fff;
  border-radius: var(--tbr-radius-md);
  display: flex;
  height: 4rem;
  justify-content: center;
  padding: var(--tbr-space-2) var(--tbr-space-3);
}

.brand-plate img {
  height: auto;
  width: 10.5rem;
}

.sidebar__version {
  color: rgb(255 255 255 / 62%);
  display: flex;
  font-size: var(--tbr-font-size-100);
  justify-content: space-between;
  letter-spacing: 0.05em;
  margin: var(--tbr-space-3) 0 0;
  text-transform: uppercase;
}

.sidebar-close {
  background: var(--tbr-navy-950);
  border-color: rgb(255 255 255 / 24%);
  color: #fff;
  display: none;
  position: absolute;
  right: var(--tbr-space-3);
  top: var(--tbr-space-3);
}

.sidebar-close:hover {
  background: var(--tbr-navy-800);
}

.sidebar-search {
  border-bottom: 1px solid rgb(255 255 255 / 12%);
  padding: var(--tbr-space-4);
}

.sidebar-search__control {
  position: relative;
}

.sidebar-search__control > .icon {
  color: rgb(255 255 255 / 62%);
  left: var(--tbr-space-3);
  pointer-events: none;
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
}

.sidebar-search input {
  appearance: none;
  background: rgb(255 255 255 / 8%);
  border: 1px solid rgb(255 255 255 / 22%);
  border-radius: var(--tbr-radius-md);
  color: #fff;
  height: var(--tbr-control-height-md);
  padding: 0 2.5rem;
  width: 100%;
}

.sidebar-search input::placeholder {
  color: rgb(255 255 255 / 62%);
}

.sidebar-search input:focus-visible {
  border-color: var(--tbr-yellow-500);
  outline: 2px solid var(--tbr-yellow-500);
  outline-offset: 2px;
}

.sidebar-search input::-webkit-search-cancel-button {
  filter: invert(1);
}

.sidebar-search kbd {
  border: 1px solid rgb(255 255 255 / 28%);
  border-radius: var(--tbr-radius-sm);
  color: rgb(255 255 255 / 68%);
  font: 600 var(--tbr-font-size-100) / 1 var(--tbr-font-mono);
  padding: 0.2rem 0.34rem;
  pointer-events: none;
  position: absolute;
  right: var(--tbr-space-3);
  top: 50%;
  transform: translateY(-50%);
}

.sidebar-search__status {
  color: var(--tbr-yellow-300);
  font-size: var(--tbr-font-size-100);
  margin: var(--tbr-space-2) var(--tbr-space-1) 0;
}

.sidebar__nav {
  flex: 1;
  padding: var(--tbr-space-4) var(--tbr-space-4) var(--tbr-space-8);
}

.nav-group + .nav-group {
  margin-top: var(--tbr-space-6);
}

.nav-group__label {
  color: var(--tbr-green-300);
  font-size: 0.6875rem;
  font-weight: 700;
  letter-spacing: 0.13em;
  margin: 0 0 var(--tbr-space-2) var(--tbr-space-3);
  text-transform: uppercase;
}

.nav-list {
  display: grid;
  gap: var(--tbr-space-1);
  list-style: none;
  margin: 0;
  padding: 0;
}

.nav-link {
  align-items: center;
  border-radius: var(--tbr-radius-md);
  color: rgb(255 255 255 / 72%);
  display: flex;
  font-size: var(--tbr-font-size-200);
  font-weight: 500;
  gap: var(--tbr-space-3);
  min-height: var(--tbr-control-height-md);
  padding: 0 var(--tbr-space-3);
  text-decoration: none;
  transition:
    background-color var(--tbr-duration-base) var(--tbr-ease-standard),
    color var(--tbr-duration-base) var(--tbr-ease-standard);
}

.nav-link::before {
  background: currentColor;
  border-radius: 50%;
  content: "";
  height: 0.375rem;
  opacity: 0.44;
  width: 0.375rem;
}

.nav-link:hover {
  background: rgb(255 255 255 / 8%);
  color: #fff;
}

.nav-link:active {
  background: rgb(255 255 255 / 14%);
}

.nav-link:focus-visible {
  outline: 2px solid var(--tbr-yellow-500);
  outline-offset: 2px;
}

.nav-link[aria-current="true"] {
  background: var(--tbr-green-500);
  color: var(--tbr-navy-950);
  font-weight: 700;
}

.nav-link[aria-current="true"]::before {
  opacity: 1;
}

.sidebar__footer {
  border-top: 1px solid rgb(255 255 255 / 12%);
  color: rgb(255 255 255 / 58%);
  font-size: var(--tbr-font-size-100);
  padding: var(--tbr-space-5) var(--tbr-space-6);
}

.sidebar__footer p {
  margin: 0;
}

.page {
  margin-left: 17rem;
  min-width: 0;
}

.topbar {
  align-items: center;
  background: color-mix(in srgb, var(--tbr-color-canvas) 88%, transparent);
  border-bottom: 1px solid var(--tbr-color-border);
  display: flex;
  gap: var(--tbr-space-3);
  height: 4.5rem;
  justify-content: space-between;
  padding: 0 clamp(1rem, 4vw, 4rem);
  position: sticky;
  top: 0;
  backdrop-filter: blur(14px);
  z-index: var(--tbr-z-sticky);
}

.reading-progress {
  bottom: -1px;
  height: 3px;
  left: 0;
  overflow: hidden;
  position: absolute;
  right: 0;
}

.reading-progress span {
  background: var(--tbr-yellow-500);
  display: block;
  height: 100%;
  transform: scaleX(0);
  transform-origin: left center;
  will-change: transform;
}

.topbar__context {
  align-items: center;
  color: var(--tbr-color-text-muted);
  display: flex;
  font-size: var(--tbr-font-size-200);
  gap: var(--tbr-space-2);
}

.topbar__context strong {
  color: var(--tbr-color-text);
}

.topbar__breadcrumb {
  align-items: center;
  display: inline-flex;
  gap: var(--tbr-space-1);
  min-width: 0;
}

#current-section {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.topbar__actions {
  align-items: center;
  display: flex;
  gap: var(--tbr-space-2);
}

.menu-button {
  display: none;
}

.icon {
  fill: none;
  height: 1.25rem;
  stroke: currentColor;
  stroke-linecap: round;
  stroke-linejoin: round;
  stroke-width: 1.8;
  width: 1.25rem;
}

.theme-icon--moon,
[data-theme="dark"] .theme-icon--sun {
  display: none;
}

[data-theme="dark"] .theme-icon--moon {
  display: block;
}

.main {
  overflow: hidden;
}

.hero {
  background: var(--tbr-navy-500);
  color: #fff;
  min-height: 40rem;
  overflow: hidden;
  padding: clamp(4rem, 9vw, 8rem) clamp(1.25rem, 6vw, 6rem) 5rem;
  position: relative;
}

.hero::before {
  background-image:
    linear-gradient(rgb(255 255 255 / 7%) 1px, transparent 1px),
    linear-gradient(90deg, rgb(255 255 255 / 7%) 1px, transparent 1px);
  background-size: 36px 36px;
  content: "";
  inset: 0;
  mask-image: linear-gradient(to bottom right, #000, transparent 76%);
  position: absolute;
}

.hero::after {
  background: var(--tbr-yellow-500);
  content: "";
  height: 28rem;
  position: absolute;
  right: -7rem;
  top: -10rem;
  transform: rotate(24deg);
  width: 12rem;
}

.hero__content {
  margin: 0 auto;
  max-width: var(--tbr-container);
  position: relative;
  z-index: 1;
}

.hero__eyebrow,
.section-kicker {
  align-items: center;
  display: flex;
  font-size: var(--tbr-font-size-100);
  font-weight: 700;
  gap: var(--tbr-space-3);
  letter-spacing: 0.12em;
  margin: 0 0 var(--tbr-space-5);
  text-transform: uppercase;
}

.hero__eyebrow {
  color: var(--tbr-green-300);
}

.hero__eyebrow::before,
.section-kicker::before {
  background: currentColor;
  content: "";
  height: 2px;
  width: 2rem;
}

.hero h1 {
  font-size: clamp(3.25rem, 8vw, 7.25rem);
  font-weight: 700;
  letter-spacing: -0.045em;
  line-height: 0.88;
  margin: 0;
  max-width: 9ch;
}

.hero h1 span {
  color: var(--tbr-yellow-500);
  display: block;
}

.hero__lead {
  color: rgb(255 255 255 / 76%);
  font-size: clamp(1.125rem, 2vw, 1.4rem);
  line-height: 1.5;
  margin: var(--tbr-space-8) 0 0;
  max-width: 43rem;
}

.hero__meta {
  border-top: 1px solid rgb(255 255 255 / 20%);
  display: grid;
  gap: var(--tbr-space-6);
  grid-template-columns: repeat(3, minmax(0, 1fr));
  margin-top: clamp(3rem, 7vw, 6rem);
  max-width: 48rem;
  padding-top: var(--tbr-space-6);
}

.hero-stat strong {
  color: var(--tbr-yellow-500);
  display: block;
  font-size: var(--tbr-font-size-600);
  line-height: 1.1;
}

.hero-stat span {
  color: rgb(255 255 255 / 64%);
  font-size: var(--tbr-font-size-200);
}

.spectrum {
  bottom: 0;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  height: 0.5rem;
  left: 0;
  position: absolute;
  right: 0;
}

.spectrum span:nth-child(1) { background: var(--tbr-green-500); }
.spectrum span:nth-child(2) { background: var(--tbr-yellow-500); }
.spectrum span:nth-child(3) { background: var(--tbr-blue-500); }
.spectrum span:nth-child(4) { background: var(--tbr-navy-900); }

.doc-section {
  border-bottom: 1px solid var(--tbr-color-border);
  padding: clamp(4rem, 8vw, 7.5rem) clamp(1.25rem, 6vw, 6rem);
  scroll-margin-top: 4.75rem;
}

.doc-section--tint {
  background: var(--tbr-color-surface-subtle);
}

.section-inner {
  margin: 0 auto;
  max-width: var(--tbr-container);
}

.section-heading {
  display: grid;
  gap: var(--tbr-space-8);
  grid-template-columns: minmax(0, 0.8fr) minmax(20rem, 1.2fr);
  margin-bottom: clamp(2.5rem, 6vw, 5rem);
}

.section-kicker {
  color: var(--tbr-color-link);
}

.section-title {
  font-size: clamp(2.25rem, 5vw, 4.5rem);
  letter-spacing: -0.035em;
  line-height: 0.98;
  margin: 0;
}

.section-title[tabindex="-1"]:focus,
.hero h1[tabindex="-1"]:focus {
  outline: none;
}

.section-intro {
  color: var(--tbr-color-text-muted);
  font-size: var(--tbr-font-size-400);
  margin: 0;
  max-width: var(--tbr-content-measure);
}

.section-intro strong {
  color: var(--tbr-color-text);
}

.principle-grid {
  counter-reset: principles;
  display: grid;
  gap: 1px;
  grid-template-columns: repeat(3, 1fr);
}

.principle {
  background: var(--tbr-color-surface);
  border-top: 3px solid var(--tbr-color-border-strong);
  counter-increment: principles;
  min-height: 18rem;
  padding: var(--tbr-space-8);
  position: relative;
}

.principle:nth-child(1) { border-color: var(--tbr-green-500); }
.principle:nth-child(2) { border-color: var(--tbr-yellow-500); }
.principle:nth-child(3) { border-color: var(--tbr-blue-500); }

.principle::before {
  color: var(--tbr-color-border-strong);
  content: "0" counter(principles);
  font-size: var(--tbr-font-size-200);
  font-weight: 700;
  letter-spacing: 0.08em;
}

.principle h3 {
  font-size: var(--tbr-font-size-600);
  margin: var(--tbr-space-12) 0 var(--tbr-space-3);
}

.principle p {
  color: var(--tbr-color-text-muted);
  margin: 0;
}

.source-note {
  align-items: flex-start;
  background: var(--tbr-color-warning-subtle);
  border: 1px solid color-mix(in srgb, var(--tbr-color-warning) 28%, transparent);
  border-left: 4px solid var(--tbr-yellow-500);
  border-radius: var(--tbr-radius-md);
  display: grid;
  gap: var(--tbr-space-2);
  margin-bottom: var(--tbr-space-8);
  padding: var(--tbr-space-5);
}

.source-note strong,
.source-note p {
  margin: 0;
}

.source-note p {
  color: var(--tbr-color-text-muted);
}

.logo-grid {
  display: grid;
  gap: var(--tbr-space-4);
  grid-template-columns: minmax(0, 1.45fr) minmax(18rem, 0.55fr);
}

.logo-stage {
  align-items: center;
  background: #fff;
  border: 1px solid var(--tbr-color-border);
  border-radius: var(--tbr-radius-lg);
  display: flex;
  justify-content: center;
  min-height: 23rem;
  margin: 0;
  overflow: hidden;
  padding: clamp(2rem, 6vw, 5rem);
  position: relative;
}

.logo-stage--vertical {
  padding: var(--tbr-space-8);
}

.logo-stage--vertical img {
  max-height: 17rem;
  width: 100%;
}

.logo-stage__label {
  background: var(--tbr-neutral-100);
  border-radius: var(--tbr-radius-pill);
  bottom: var(--tbr-space-4);
  color: var(--tbr-neutral-700);
  font-size: var(--tbr-font-size-100);
  font-weight: 600;
  left: var(--tbr-space-4);
  padding: var(--tbr-space-1) var(--tbr-space-3);
  position: absolute;
}

.logo-stage--clearspace::before {
  border: 1px dashed var(--tbr-green-500);
  content: "";
  inset: 12%;
  pointer-events: none;
  position: absolute;
}

.logo-stage--clearspace img {
  width: 78%;
}

.avatar-row {
  display: grid;
  gap: var(--tbr-space-3);
  grid-template-columns: repeat(4, 1fr);
  margin-top: var(--tbr-space-4);
}

.avatar-tile {
  align-items: center;
  background: #fff;
  border: 1px solid var(--tbr-color-border);
  border-radius: var(--tbr-radius-lg);
  display: flex;
  justify-content: center;
  min-height: 10rem;
  overflow: hidden;
  padding: var(--tbr-space-3);
}

.avatar-tile img {
  height: 8rem;
  width: 8rem;
}

.usage-grid {
  display: grid;
  gap: var(--tbr-space-4);
  grid-template-columns: 1fr 1fr;
  margin-top: var(--tbr-space-8);
}

.usage-card {
  border: 1px solid var(--tbr-color-border);
  border-radius: var(--tbr-radius-lg);
  padding: var(--tbr-space-6);
}

.usage-card--do { border-top: 4px solid var(--tbr-color-success); }
.usage-card--dont { border-top: 4px solid var(--tbr-color-danger); }

.usage-card h3 {
  margin: 0 0 var(--tbr-space-4);
}

.check-list {
  display: grid;
  gap: var(--tbr-space-3);
  list-style: none;
  margin: 0;
  padding: 0;
}

.check-list li {
  color: var(--tbr-color-text-muted);
  display: flex;
  gap: var(--tbr-space-3);
}

.check-list li::before {
  color: var(--tbr-color-success);
  content: "✓";
  font-weight: 700;
}

.usage-card--dont .check-list li::before {
  color: var(--tbr-color-danger);
  content: "×";
}

.swatch-grid {
  display: grid;
  gap: var(--tbr-space-4);
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.swatch {
  background: var(--swatch);
  border: 1px solid rgb(0 0 0 / 8%);
  border-radius: var(--tbr-radius-lg);
  color: var(--swatch-text, #fff);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  min-height: 15rem;
  overflow: hidden;
  padding: var(--tbr-space-5);
}

.swatch__role {
  font-size: var(--tbr-font-size-100);
  font-weight: 700;
  letter-spacing: 0.08em;
  opacity: 0.76;
  text-transform: uppercase;
}

.swatch__footer {
  align-items: end;
  display: flex;
  justify-content: space-between;
}

.swatch__name {
  font-size: var(--tbr-font-size-500);
  font-weight: 700;
}

.swatch__hex {
  display: block;
  font-family: var(--tbr-font-mono);
  font-size: var(--tbr-font-size-100);
  font-weight: 500;
  opacity: 0.76;
}

.copy-swatch {
  align-items: center;
  background: rgb(255 255 255 / 14%);
  border: 1px solid currentColor;
  border-radius: var(--tbr-radius-md);
  color: inherit;
  cursor: pointer;
  display: inline-flex;
  height: var(--tbr-control-height-md);
  justify-content: center;
  opacity: 0.74;
  width: var(--tbr-control-height-md);
}

.copy-swatch:hover,
.copy-swatch:focus-visible {
  background: rgb(255 255 255 / 24%);
  opacity: 1;
}

.copy-swatch:focus-visible {
  outline: 2px solid currentColor;
  outline-offset: 3px;
}

.semantic-grid {
  display: grid;
  gap: var(--tbr-space-4);
  grid-template-columns: repeat(4, 1fr);
  margin-top: var(--tbr-space-8);
}

.semantic-chip {
  align-items: center;
  background: var(--tbr-color-surface);
  border: 1px solid var(--tbr-color-border);
  border-radius: var(--tbr-radius-md);
  display: flex;
  gap: var(--tbr-space-3);
  padding: var(--tbr-space-4);
}

.semantic-chip__color {
  background: var(--chip);
  border: 1px solid rgb(0 0 0 / 10%);
  border-radius: 50%;
  flex: 0 0 auto;
  height: 1.75rem;
  width: 1.75rem;
}

.semantic-chip strong,
.semantic-chip span {
  display: block;
}

.semantic-chip span {
  color: var(--tbr-color-text-muted);
  font-family: var(--tbr-font-mono);
  font-size: var(--tbr-font-size-100);
}

.type-specimen {
  background: var(--tbr-color-surface);
  border: 1px solid var(--tbr-color-border);
  border-radius: var(--tbr-radius-lg);
  display: grid;
  gap: 1px;
  overflow: hidden;
}

.type-row {
  align-items: baseline;
  background: var(--tbr-color-surface);
  display: grid;
  gap: var(--tbr-space-6);
  grid-template-columns: 8rem 1fr;
  padding: var(--tbr-space-6);
}

.type-row + .type-row {
  border-top: 1px solid var(--tbr-color-border);
}

.type-meta {
  color: var(--tbr-color-text-muted);
  font-family: var(--tbr-font-mono);
  font-size: var(--tbr-font-size-100);
}

.type-display {
  font-size: clamp(3rem, 7vw, 5.5rem);
  font-weight: 700;
  letter-spacing: -0.045em;
  line-height: 0.92;
}

.type-heading {
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 600;
  letter-spacing: -0.025em;
  line-height: 1.05;
}

.type-body {
  font-size: var(--tbr-font-size-400);
  line-height: var(--tbr-line-height-relaxed);
  max-width: 62ch;
}

.type-label {
  font-size: var(--tbr-font-size-100);
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.foundation-grid {
  display: grid;
  gap: var(--tbr-space-4);
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.foundation-card {
  background: var(--tbr-color-surface);
  border: 1px solid var(--tbr-color-border);
  border-radius: var(--tbr-radius-lg);
  padding: var(--tbr-space-6);
}

.foundation-card h3 {
  margin: 0 0 var(--tbr-space-2);
}

.foundation-card > p {
  color: var(--tbr-color-text-muted);
  margin: 0 0 var(--tbr-space-6);
}

.space-list {
  display: grid;
  gap: var(--tbr-space-3);
}

.space-token {
  align-items: center;
  display: grid;
  gap: var(--tbr-space-3);
  grid-template-columns: 3rem 1fr 3rem;
}

.space-token span,
.space-token code {
  color: var(--tbr-color-text-muted);
  font-size: var(--tbr-font-size-100);
}

.space-token__bar {
  background: var(--tbr-green-500);
  border-radius: 2px;
  height: 0.75rem;
  max-width: 100%;
  width: var(--bar);
}

.radius-list,
.shadow-list {
  display: grid;
  gap: var(--tbr-space-3);
  grid-template-columns: repeat(3, 1fr);
}

.radius-sample,
.shadow-sample {
  align-items: center;
  aspect-ratio: 1.4;
  background: var(--tbr-color-surface-subtle);
  border: 1px solid var(--tbr-color-border);
  border-radius: var(--radius);
  color: var(--tbr-color-text-muted);
  display: flex;
  font-size: var(--tbr-font-size-100);
  justify-content: center;
}

.shadow-sample {
  background: var(--tbr-color-surface);
  border: 0;
  border-radius: var(--tbr-radius-md);
  box-shadow: var(--shadow);
}

.motion-stage {
  align-items: center;
  background: var(--tbr-navy-950);
  border-radius: var(--tbr-radius-lg);
  display: flex;
  height: 13rem;
  justify-content: center;
  overflow: hidden;
  position: relative;
}

.motion-stage::before {
  background: linear-gradient(90deg, transparent, rgb(255 255 255 / 8%), transparent);
  content: "";
  inset: 0;
  position: absolute;
}

.motion-dot {
  animation: motion-demo 2.4s var(--tbr-ease-standard) infinite;
  background: var(--tbr-yellow-500);
  border-radius: 50%;
  box-shadow: 0 0 0 0 rgb(240 206 0 / 28%);
  height: 3rem;
  width: 3rem;
}

.component-demo {
  background: var(--tbr-color-surface);
  border: 1px solid var(--tbr-color-border);
  border-radius: var(--tbr-radius-lg);
  overflow: hidden;
}

.component-demo + .component-demo {
  margin-top: var(--tbr-space-6);
}

.component-demo__header {
  align-items: center;
  border-bottom: 1px solid var(--tbr-color-border);
  display: flex;
  justify-content: space-between;
  padding: var(--tbr-space-4) var(--tbr-space-5);
}

.component-demo__header h3 {
  font-size: var(--tbr-font-size-400);
  margin: 0;
}

.component-demo__header code {
  color: var(--tbr-color-text-muted);
  font-size: var(--tbr-font-size-100);
}

.component-demo__stage {
  align-items: center;
  display: flex;
  flex-wrap: wrap;
  gap: var(--tbr-space-4);
  min-height: 10rem;
  padding: var(--tbr-space-8);
}

.component-demo__stage--form {
  align-items: flex-start;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.component-demo__stage--alerts {
  align-items: stretch;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.form-actions {
  align-items: center;
  display: flex;
  flex-wrap: wrap;
  gap: var(--tbr-space-4);
  grid-column: 1 / -1;
}

.switch-row {
  align-items: center;
  cursor: pointer;
  display: flex;
  gap: var(--tbr-space-3);
  min-height: var(--tbr-control-height-md);
}

.alert-content strong,
.alert-content span {
  display: block;
}

.alert-content span {
  color: var(--tbr-color-text-muted);
  font-size: var(--tbr-font-size-200);
  margin-top: var(--tbr-space-1);
}

.product-card {
  max-width: 22rem;
}

.product-card__visual {
  background: var(--tbr-navy-500);
  border-radius: var(--tbr-radius-md);
  color: #fff;
  display: grid;
  min-height: 11rem;
  overflow: hidden;
  padding: var(--tbr-space-5);
  position: relative;
}

.product-card__visual::before {
  background: var(--tbr-yellow-500);
  content: "";
  height: 10rem;
  position: absolute;
  right: -2.5rem;
  top: -4rem;
  transform: rotate(30deg);
  width: 5rem;
}

.product-card__visual strong {
  align-self: end;
  font-size: var(--tbr-font-size-600);
  line-height: 1.1;
  max-width: 10ch;
  position: relative;
}

.product-card h4 {
  font-size: var(--tbr-font-size-500);
  margin: var(--tbr-space-5) 0 var(--tbr-space-2);
}

.product-card p {
  color: var(--tbr-color-text-muted);
  margin: 0 0 var(--tbr-space-5);
}

.contrast-table-wrap {
  border: 1px solid var(--tbr-color-border);
  border-radius: var(--tbr-radius-lg);
  overflow-x: auto;
}

.contrast-table {
  border-collapse: collapse;
  min-width: 46rem;
  width: 100%;
}

.contrast-table th,
.contrast-table td {
  border-bottom: 1px solid var(--tbr-color-border);
  padding: var(--tbr-space-4) var(--tbr-space-5);
  text-align: left;
}

.contrast-table th {
  background: var(--tbr-color-surface-subtle);
  color: var(--tbr-color-text-muted);
  font-size: var(--tbr-font-size-100);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.contrast-table td code {
  color: var(--tbr-color-text-muted);
  font-size: var(--tbr-font-size-100);
}

.contrast-table tr:last-child td {
  border-bottom: 0;
}

.pair-preview {
  align-items: center;
  background: var(--pair-bg);
  border: 1px solid var(--tbr-color-border);
  border-radius: var(--tbr-radius-sm);
  color: var(--pair-fg);
  display: inline-flex;
  font-weight: 700;
  min-height: 2.25rem;
  padding: 0 var(--tbr-space-3);
}

.status-pass {
  color: var(--tbr-color-success);
  font-weight: 700;
}

.status-limited {
  color: var(--tbr-color-warning);
  font-weight: 700;
}

.quality-grid {
  display: grid;
  gap: var(--tbr-space-4);
  grid-template-columns: repeat(3, 1fr);
  margin-top: var(--tbr-space-8);
}

.quality-card {
  background: var(--tbr-color-surface);
  border: 1px solid var(--tbr-color-border);
  border-radius: var(--tbr-radius-lg);
  padding: var(--tbr-space-6);
}

.quality-card__number {
  color: var(--tbr-color-link);
  font-size: var(--tbr-font-size-700);
  font-weight: 700;
  letter-spacing: -0.03em;
}

.quality-card h3 {
  margin: var(--tbr-space-5) 0 var(--tbr-space-2);
}

.quality-card p {
  color: var(--tbr-color-text-muted);
  margin: 0;
}

.resource-grid {
  display: grid;
  gap: var(--tbr-space-4);
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.resource-card {
  align-items: flex-start;
  background: var(--tbr-color-surface);
  border: 1px solid var(--tbr-color-border);
  border-radius: var(--tbr-radius-lg);
  color: var(--tbr-color-text);
  display: flex;
  gap: var(--tbr-space-4);
  min-height: 9rem;
  padding: var(--tbr-space-5);
  text-decoration: none;
  transition:
    border-color var(--tbr-duration-base) var(--tbr-ease-standard),
    box-shadow var(--tbr-duration-base) var(--tbr-ease-standard),
    transform var(--tbr-duration-base) var(--tbr-ease-standard);
}

.resource-card:hover {
  border-color: var(--tbr-color-primary);
  box-shadow: var(--tbr-shadow-md);
  color: var(--tbr-color-text);
  transform: translateY(-2px);
}

.resource-card:active {
  transform: translateY(1px);
}

.resource-card__icon {
  align-items: center;
  background: var(--tbr-color-surface-subtle);
  border-radius: var(--tbr-radius-md);
  color: var(--tbr-color-link);
  display: flex;
  flex: 0 0 auto;
  height: 3rem;
  justify-content: center;
  width: 3rem;
}

.resource-card h3,
.resource-card p {
  margin: 0;
}

.resource-card p {
  color: var(--tbr-color-text-muted);
  font-size: var(--tbr-font-size-200);
  margin-top: var(--tbr-space-2);
}

.wallpaper-preview {
  aspect-ratio: 16 / 9;
  background: var(--tbr-navy-950);
  border-radius: var(--tbr-radius-lg);
  height: auto;
  margin-top: var(--tbr-space-6);
  object-fit: contain;
  width: 100%;
}

.page-footer {
  align-items: center;
  background: var(--tbr-navy-950);
  color: rgb(255 255 255 / 66%);
  display: flex;
  font-size: var(--tbr-font-size-200);
  justify-content: space-between;
  padding: var(--tbr-space-8) clamp(1.25rem, 6vw, 6rem);
}

.page-footer strong {
  color: #fff;
}

.toast {
  align-items: center;
  background: var(--tbr-neutral-900);
  border: 1px solid rgb(255 255 255 / 14%);
  border-radius: var(--tbr-radius-md);
  bottom: var(--tbr-space-6);
  box-shadow: var(--tbr-shadow-lg);
  color: #fff;
  display: flex;
  gap: var(--tbr-space-3);
  max-width: min(24rem, calc(100vw - 2rem));
  padding: var(--tbr-space-4) var(--tbr-space-5);
  position: fixed;
  right: var(--tbr-space-6);
  transform: translateY(calc(100% + 3rem));
  transition: transform var(--tbr-duration-slow) var(--tbr-ease-standard);
  z-index: var(--tbr-z-toast);
}

.toast[data-visible="true"] {
  transform: translateY(0);
}

.toast__mark {
  align-items: center;
  background: var(--tbr-green-500);
  border-radius: 50%;
  color: var(--tbr-navy-950);
  display: flex;
  flex: 0 0 auto;
  font-weight: 700;
  height: 1.75rem;
  justify-content: center;
  width: 1.75rem;
}

.overlay {
  background: var(--tbr-color-overlay);
  inset: 0;
  opacity: 0;
  pointer-events: none;
  position: fixed;
  transition: opacity var(--tbr-duration-base) var(--tbr-ease-standard);
  z-index: calc(var(--tbr-z-overlay) - 1);
}

@keyframes motion-demo {
  0%, 100% {
    box-shadow: 0 0 0 0 rgb(240 206 0 / 26%);
    transform: translateX(-4rem) scale(0.82);
  }
  50% {
    box-shadow: 0 0 0 1.5rem rgb(240 206 0 / 0%);
    transform: translateX(4rem) scale(1);
  }
}

@media (max-width: 1080px) {
  .sidebar {
    box-shadow: var(--tbr-shadow-lg);
    transform: translateX(-100%);
    transition: transform var(--tbr-duration-slow) var(--tbr-ease-standard);
  }

  .sidebar[data-open="true"] {
    transform: translateX(0);
  }

  .sidebar-close {
    display: inline-flex;
  }

  .sidebar[data-open="true"] ~ .page .overlay {
    opacity: 1;
    pointer-events: auto;
  }

  .page {
    margin-left: 0;
  }

  .menu-button {
    display: inline-flex;
  }

  .section-heading {
    grid-template-columns: 1fr;
  }

  .principle-grid,
  .swatch-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .semantic-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 760px) {
  .topbar {
    height: 4rem;
    padding-inline: var(--tbr-space-4);
  }

  .topbar__root,
  .topbar__separator,
  .topbar__actions > .tbr-button {
    display: none;
  }

  .topbar__context {
    min-width: 0;
  }

  .topbar__breadcrumb {
    max-width: min(48vw, 12rem);
  }

  .hero {
    min-height: 38rem;
    padding-top: 4.5rem;
  }

  .hero::after {
    height: 18rem;
    right: -7rem;
    top: -8rem;
    width: 9rem;
  }

  .hero h1 {
    font-size: clamp(3rem, 17vw, 5.25rem);
  }

  .hero__meta {
    gap: var(--tbr-space-4);
    grid-template-columns: 1fr;
    margin-top: var(--tbr-space-12);
  }

  .doc-section {
    padding-block: var(--tbr-space-16);
  }

  .principle-grid,
  .logo-grid,
  .usage-grid,
  .swatch-grid,
  .semantic-grid,
  .foundation-grid,
  .component-demo__stage--form,
  .component-demo__stage--alerts,
  .quality-grid,
  .resource-grid {
    grid-template-columns: 1fr;
  }

  .principle {
    min-height: 15rem;
  }

  .logo-stage {
    min-height: 17rem;
  }

  .avatar-row {
    grid-template-columns: repeat(2, 1fr);
  }

  .type-row {
    gap: var(--tbr-space-3);
    grid-template-columns: 1fr;
    padding: var(--tbr-space-5);
  }

  .component-demo__stage {
    align-items: stretch;
    flex-direction: column;
    padding: var(--tbr-space-5);
  }

  .component-demo__stage .tbr-button {
    width: 100%;
  }

  .radius-list,
  .shadow-list {
    grid-template-columns: repeat(2, 1fr);
  }

  .page-footer {
    align-items: flex-start;
    flex-direction: column;
    gap: var(--tbr-space-3);
  }

  .toast {
    bottom: var(--tbr-space-4);
    left: var(--tbr-space-4);
    right: var(--tbr-space-4);
  }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    scroll-behavior: auto !important;
    transition-duration: 0.01ms !important;
  }
}