:root {
  --paper: #f4efe5;
  --ink: #1b1c1e;
  --muted: #5b5c61;
  --line: rgba(27, 28, 30, 0.12);
  --panel: rgba(255, 255, 255, 0.7);
  --panel-strong: rgba(255, 255, 255, 0.9);
  --accent: #b44a2a;
  --accent-soft: #e2b66c;
  --shadow: 0 18px 40px rgba(63, 42, 25, 0.12);
  font-family: "Space Grotesk", "Avenir Next", sans-serif;
  color: var(--ink);
  background:
    radial-gradient(circle at top left, rgba(226, 182, 108, 0.35), transparent 32rem),
    linear-gradient(180deg, #f6f1e8, var(--paper));
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
}

a {
  color: inherit;
  text-decoration: none;
}

.page-shell {
  width: min(1180px, calc(100% - 2rem));
  margin: 0 auto;
  padding: 1.25rem 0 4rem;
}

.topbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  margin-bottom: 2rem;
}

.brand {
  font-size: 1.1rem;
  font-weight: 700;
  letter-spacing: 0.02em;
}

.topnav {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  color: var(--muted);
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.6fr) minmax(280px, 0.9fr);
  gap: 1.5rem;
  align-items: stretch;
  margin-bottom: 2rem;
}

.hero-copy,
.hero-card,
.demo-panel,
.demo-canvas-card,
.package-strip,
.resource-card,
.flow-step,
.technical-callout,
.technical-card {
  border: 1px solid var(--line);
  border-radius: 24px;
  background: var(--panel);
  backdrop-filter: blur(12px);
  box-shadow: var(--shadow);
}

.hero-copy,
.hero-card,
.demo-panel,
.package-strip,
.resource-card,
.flow-step,
.technical-callout,
.technical-card {
  padding: 1.5rem;
}

.hero-copy h1,
.section-heading h1,
.section-heading h2 {
  margin: 0 0 0.75rem;
  line-height: 1.1;
}

.section-heading h1 {
  font-size: clamp(1.45rem, 2.35vw, 1.95rem);
  line-height: 1.06;
  max-width: 32ch;
}

.section-heading h2 {
  font-size: clamp(1.55rem, 2.7vw, 2.15rem);
}

.hero-copy h1 {
  font-size: clamp(2.8rem, 7vw, 5.25rem);
  max-width: 12ch;
}

.hero-text,
.section-heading p,
.technical-card p,
.package-strip p,
.demo-panel p,
.hero-card p {
  color: var(--muted);
  line-height: 1.6;
}

.eyebrow {
  text-transform: uppercase;
  letter-spacing: 0.12em;
  font-size: 0.78rem;
  color: var(--accent);
  margin: 0 0 0.75rem;
}

.runtime-selector {
  display: grid;
  gap: 0.45rem;
  margin-top: 0.95rem;
  max-width: 18rem;
}

.runtime-selector[hidden] {
  display: none;
}

.runtime-selector-label {
  margin: 0;
  color: var(--muted);
  font-size: 0.88rem;
  font-weight: 600;
}

.runtime-selector-field {
  position: relative;
}

.runtime-selector-select {
  width: 100%;
  appearance: none;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: rgba(255, 255, 255, 0.86);
  padding: 0.72rem 2.6rem 0.72rem 0.9rem;
  font-family: "IBM Plex Mono", "SFMono-Regular", monospace;
  font-size: 0.84rem;
  line-height: 1.35;
  color: var(--ink);
  box-shadow: 0 10px 24px rgba(63, 42, 25, 0.08);
}

.runtime-selector-field::after {
  content: "";
  position: absolute;
  top: 50%;
  right: 0.95rem;
  width: 0.7rem;
  height: 0.7rem;
  border-right: 2px solid rgba(27, 28, 30, 0.58);
  border-bottom: 2px solid rgba(27, 28, 30, 0.58);
  transform: translateY(-65%) rotate(45deg);
  pointer-events: none;
}

.runtime-selector-select:disabled {
  color: var(--muted);
  cursor: default;
  box-shadow: none;
}

.button {
  border-radius: 999px;
  padding: 0.85rem 1.2rem;
  font-weight: 600;
}

.button-primary {
  background: var(--ink);
  color: white;
}

.button-secondary {
  background: rgba(255, 255, 255, 0.8);
  border: 1px solid var(--line);
}

.how-strip {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1rem;
  margin-bottom: 2rem;
}

.how-strip article {
  padding: 1.1rem 1.15rem;
  border-radius: 20px;
  background: rgba(255, 255, 255, 0.55);
  border: 1px solid var(--line);
}

.how-strip h2 {
  margin: 0 0 0.4rem;
  font-size: 1rem;
}

.demo-section {
  margin-bottom: 2rem;
}

.quick-mix-section {
  margin-bottom: 2rem;
}

.quick-mix-layout {
  display: grid;
  grid-template-columns: minmax(260px, 0.82fr) minmax(0, 1.18fr);
  gap: 1rem;
  align-items: start;
}

.quick-mix-card {
  border: 1px solid var(--line);
  border-radius: 24px;
  background: rgba(255, 255, 255, 0.72);
  box-shadow: var(--shadow);
  padding: 1.35rem;
}

.quick-mix-card h3 {
  margin: 0 0 0.5rem;
}

.quick-mix-card p {
  margin: 0;
  color: var(--muted);
  line-height: 1.6;
}

.quick-mix-builder,
.quick-mix-result {
  display: grid;
  gap: 1rem;
}

.quick-mix-palette {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(88px, 1fr));
  gap: 0.7rem;
}

.quick-mix-chip {
  display: grid;
  justify-items: center;
  gap: 0.45rem;
  border: 1px solid var(--line);
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.84);
  padding: 0.8rem 0.55rem;
  font: inherit;
  text-align: center;
  cursor: pointer;
}

.quick-mix-chip[data-active="true"] {
  border-color: rgba(180, 74, 42, 0.65);
  box-shadow: 0 0 0 2px rgba(180, 74, 42, 0.12);
}

.quick-mix-chip-swatch {
  width: 2rem;
  height: 2rem;
  border-radius: 999px;
  border: 2px solid rgba(255, 255, 255, 0.92);
  background: var(--swatch);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.12);
}

.quick-mix-chip-hex {
  color: var(--muted);
  font-size: 0.83rem;
  font-family: "IBM Plex Mono", "SFMono-Regular", monospace;
}

.quick-mix-add-color {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  gap: 0.7rem;
  align-items: end;
}

.quick-mix-add-control {
  display: grid;
  gap: 0.35rem;
}

.quick-mix-add-control span {
  color: var(--muted);
  font-size: 0.95rem;
}

.quick-mix-add-control input {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 0.75rem 0.85rem;
  font: inherit;
  background: rgba(255, 255, 255, 0.84);
}

.quick-mix-add-control-color input {
  min-width: 4.25rem;
  min-height: 3rem;
  padding: 0.3rem;
}

.quick-mix-meta {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.8rem;
  margin: 0;
}

.quick-mix-meta div {
  border: 1px solid var(--line);
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.58);
  padding: 0.85rem 0.95rem;
}

.quick-mix-meta dt,
.quick-mix-meta dd {
  margin: 0;
}

.quick-mix-meta dt {
  color: var(--muted);
}

.quick-mix-meta dd {
  margin-top: 0.25rem;
  font-weight: 700;
}

.quick-mix-ratio-bar {
  display: flex;
  min-height: 1.15rem;
  border-radius: 999px;
  overflow: hidden;
  border: 1px solid rgba(27, 28, 30, 0.12);
  background: rgba(255, 255, 255, 0.7);
}

.quick-mix-ratio-segment {
  min-width: 0.65rem;
  background: var(--segment-color);
}

.quick-mix-ratio-paper {
  box-shadow: inset 0 0 0 1px rgba(27, 28, 30, 0.08);
}

.section-heading {
  max-width: 55rem;
  margin-bottom: 1.1rem;
}

.quick-mix-note {
  margin: 0;
  color: var(--muted);
  line-height: 1.6;
}

.usage-section {
  margin-bottom: 2rem;
}

.usage-card {
  border: 1px solid var(--line);
  border-radius: 24px;
  background: rgba(255, 255, 255, 0.72);
  box-shadow: var(--shadow);
  padding: 1.35rem;
}

.usage-tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
  margin-bottom: 1rem;
}

.usage-tab {
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.84);
  border-radius: 999px;
  padding: 0.72rem 0.95rem;
  font: inherit;
  cursor: pointer;
}

.usage-tab.is-active {
  background: var(--ink);
  color: #fff;
}

.usage-panel[hidden] {
  display: none;
}

.usage-grid {
  display: grid;
  grid-template-columns: minmax(240px, 0.75fr) minmax(0, 1.25fr);
  gap: 1rem;
  align-items: start;
}

.usage-block {
  display: grid;
  gap: 0.55rem;
  align-content: start;
}

.usage-block .eyebrow {
  margin-bottom: 0;
}

.demo-layout {
  display: grid;
  grid-template-columns: minmax(220px, 0.9fr) minmax(0, 1.7fr) minmax(220px, 0.9fr);
  gap: 1rem;
  align-items: start;
}

.demo-panel h3,
.hero-card h2,
.technical-card h2 {
  margin-top: 0;
}

.swatch-row {
  display: flex;
  gap: 0.6rem;
  flex-wrap: wrap;
  margin-top: 1rem;
}

.demo-panel-palette,
.demo-panel-inspector {
  display: grid;
  gap: 1rem;
}

.palette-list,
.hidden-palette-list {
  display: grid;
  gap: 0.65rem;
}

.palette-item {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 0.65rem;
  align-items: center;
}

.palette-swatch-button,
.palette-action,
.hidden-palette-chip {
  font: inherit;
}

.palette-swatch-button {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 0.8rem;
  align-items: center;
  width: 100%;
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.82);
  border-radius: 18px;
  padding: 0.75rem;
  text-align: left;
  cursor: pointer;
}

.palette-item[data-active="true"] .palette-swatch-button {
  border-color: rgba(180, 74, 42, 0.6);
  box-shadow: 0 0 0 2px rgba(180, 74, 42, 0.12);
}

.palette-swatch {
  width: 2.5rem;
  height: 2.5rem;
  border-radius: 999px;
  border: 2px solid rgba(255, 255, 255, 0.92);
  box-shadow: 0 6px 16px rgba(0, 0, 0, 0.16);
  background: var(--swatch);
}

.palette-copy {
  display: grid;
  gap: 0.2rem;
}

.palette-copy strong,
.palette-copy small {
  display: block;
}

.palette-copy small,
.render-pane-head p,
.canvas-status,
.range-control span,
.add-color-form label span,
.hidden-palette h4,
.recipe-list,
.inspector-grid dt {
  color: var(--muted);
}

.palette-action,
.hidden-palette-chip {
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.72);
  border-radius: 999px;
  padding: 0.7rem 0.95rem;
  cursor: pointer;
}

.palette-action:disabled {
  opacity: 0.45;
  cursor: not-allowed;
}

.add-color-form {
  display: grid;
  gap: 0.75rem;
}

.add-color-form label {
  display: grid;
  gap: 0.35rem;
}

.add-color-form input {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 0.75rem 0.85rem;
  font: inherit;
  background: rgba(255, 255, 255, 0.84);
}

.add-color-form input[type="color"] {
  min-height: 3rem;
  padding: 0.35rem;
}

.hidden-palette h4,
.recipe-panel h4,
.swatch-compare h4 {
  margin: 0 0 0.6rem;
}

.demo-canvas-card {
  display: grid;
  gap: 1rem;
  padding: 1rem;
}

.mode-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.mode-chip {
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.68);
  border-radius: 999px;
  padding: 0.65rem 0.95rem;
  font: inherit;
  cursor: pointer;
}

.mode-chip.is-active {
  background: var(--ink);
  color: white;
}

.canvas-status-row {
  display: grid;
  gap: 0.9rem;
}

.canvas-status {
  margin: 0;
}

.tool-row {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.8rem;
}

.range-control {
  display: grid;
  gap: 0.45rem;
}

.range-control output {
  font-weight: 700;
}

.canvas-stack {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1rem;
}

.canvas-stack[data-mode="split"] {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.render-pane {
  display: none;
  gap: 0.8rem;
}

.canvas-stack[data-mode="corrected"] .render-pane-corrected,
.canvas-stack[data-mode="base"] .render-pane-base,
.canvas-stack[data-mode="split"] .render-pane {
  display: grid;
}

.render-pane-head {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 1rem;
}

.render-pane-head h3,
.render-pane-head p {
  margin: 0;
}

.paint-canvas {
  width: 100%;
  max-width: 100%;
  height: auto;
  display: block;
  border-radius: 20px;
  border: 1px solid var(--line);
  background: #ffffff;
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.65);
  touch-action: none;
}

.package-strip {
  display: grid;
  grid-template-columns: minmax(0, 0.8fr) minmax(0, 1.2fr);
  gap: 1rem;
}

.package-copy {
  display: grid;
  gap: 0.9rem;
}

.code-panel {
  margin: 0;
  padding: 1rem 1.1rem;
  border-radius: 18px;
  border: 1px solid rgba(27, 28, 30, 0.1);
  background: rgba(26, 28, 31, 0.94);
  color: #f7f0e5;
  overflow-x: auto;
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.06);
}

.code-panel code {
  font-family: "IBM Plex Mono", "SFMono-Regular", monospace;
  font-size: 0.93rem;
  line-height: 1.6;
}

.code-keyword {
  color: #f0b56b;
}

.code-type,
.code-function {
  color: #89d2ff;
}

.code-string {
  color: #c7eb8b;
}

.code-property,
.code-package {
  color: #f3d39c;
}

.code-number {
  color: #ffbaa3;
}

.code-command,
.code-subcommand {
  color: #e4eef9;
  font-weight: 600;
}

.resource-strip {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 1rem;
  margin-top: 2rem;
}

.validation-section {
  margin-top: 2rem;
}

.validation-status {
  margin-bottom: 1rem;
  color: var(--muted);
}

.validation-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem;
}

.validation-card {
  display: grid;
  gap: 1rem;
  padding: 1.25rem;
  border: 1px solid var(--line);
  border-radius: 24px;
  background: rgba(255, 255, 255, 0.62);
  box-shadow: var(--shadow);
}

.validation-card[data-selected="true"] {
  border-color: rgba(180, 74, 42, 0.55);
  box-shadow:
    var(--shadow),
    0 0 0 2px rgba(180, 74, 42, 0.12);
}

.validation-card-head {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  align-items: start;
}

.validation-card h3,
.validation-card h4,
.validation-summary {
  margin: 0;
}

.validation-meta {
  margin: 0.35rem 0 0;
  color: var(--muted);
}

.validation-badge {
  display: inline-flex;
  width: fit-content;
  border-radius: 999px;
  padding: 0.45rem 0.7rem;
  font-weight: 700;
  white-space: nowrap;
}

.validation-badge[data-state="match"] {
  background: rgba(52, 122, 90, 0.12);
  color: #295844;
}

.validation-badge[data-state="drift"] {
  background: rgba(180, 74, 42, 0.12);
  color: var(--accent);
}

.validation-metrics {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.8rem;
}

.validation-metric {
  border: 1px solid var(--line);
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.58);
  padding: 0.85rem;
}

.validation-chip {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  margin-top: 0.55rem;
}

.validation-swatch {
  width: 1.8rem;
  height: 1.8rem;
  border-radius: 999px;
  border: 2px solid rgba(255, 255, 255, 0.92);
  box-shadow: 0 6px 16px rgba(0, 0, 0, 0.14);
  background: var(--validation-swatch);
}

.validation-summary {
  color: var(--muted);
  line-height: 1.6;
}

.validation-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.resource-card {
  display: grid;
  gap: 0.8rem;
}

.resource-card h2,
.flow-step h2,
.technical-callout h2 {
  margin: 0;
}

.resource-link {
  font-weight: 700;
  color: var(--accent);
}

.resource-status {
  display: inline-flex;
  width: fit-content;
  border-radius: 999px;
  padding: 0.45rem 0.7rem;
  background: rgba(180, 74, 42, 0.12);
  color: var(--accent);
  font-weight: 700;
}

.footer {
  color: var(--muted);
  margin-top: 1.5rem;
  text-align: center;
}

.technical-page {
  display: grid;
  gap: 1.5rem;
}

.technical-flow {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 1rem;
}

.flow-step {
  display: grid;
  gap: 0.6rem;
}

.flow-step p,
.technical-callout p {
  margin: 0;
  color: var(--muted);
  line-height: 1.6;
}

.technical-callout {
  display: grid;
  gap: 1rem;
}

.inspector-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.85rem;
  margin: 0;
}

.inspector-grid div {
  border: 1px solid var(--line);
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.55);
  padding: 0.85rem 0.95rem;
}

.inspector-grid dt,
.inspector-grid dd,
.recipe-list {
  margin: 0;
}

.inspector-grid dd {
  font-weight: 700;
  margin-top: 0.25rem;
}

.swatch-compare {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.8rem;
}

.swatch-compare article {
  border: 1px solid var(--line);
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.58);
  padding: 0.9rem;
}

.compare-chip {
  display: flex;
  align-items: center;
  gap: 0.65rem;
}

.compare-swatch {
  width: 2rem;
  height: 2rem;
  border-radius: 999px;
  border: 2px solid rgba(255, 255, 255, 0.92);
  background: var(--compare-swatch);
  box-shadow: 0 6px 16px rgba(0, 0, 0, 0.14);
}

.recipe-panel {
  border: 1px solid var(--line);
  border-radius: 20px;
  background: rgba(255, 255, 255, 0.58);
  padding: 1rem;
}

.probe-summary {
  margin: 0;
  color: var(--muted);
  line-height: 1.55;
}

.probe-rows {
  display: grid;
  gap: 0.75rem;
}

.probe-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 6rem auto;
  gap: 0.7rem;
  align-items: end;
}

.probe-field {
  display: grid;
  gap: 0.35rem;
}

.probe-field span {
  color: var(--muted);
  font-size: 0.95rem;
}

.probe-field select,
.probe-field input {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 0.75rem 0.85rem;
  font: inherit;
  background: rgba(255, 255, 255, 0.84);
}

.probe-remove {
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.72);
  border-radius: 999px;
  padding: 0.75rem 0.95rem;
  font: inherit;
  cursor: pointer;
}

.probe-actions,
.inspector-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.probe-results {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.8rem;
}

.probe-result-card {
  border: 1px solid var(--line);
  border-radius: 20px;
  background: rgba(255, 255, 255, 0.58);
  padding: 1rem;
  display: grid;
  gap: 0.8rem;
}

.probe-result-head {
  display: grid;
  gap: 0.25rem;
}

.probe-result-head h4 {
  margin: 0;
  font-size: 1rem;
}

.probe-result-head p {
  margin: 0;
  color: var(--muted);
  font-size: 0.95rem;
  line-height: 1.5;
}

.probe-result-preview {
  min-height: 9rem;
  border-radius: 18px;
  border: 1px solid rgba(27, 28, 30, 0.08);
  background: var(--probe-result);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.35);
}

.probe-result-hex {
  display: inline-flex;
  width: fit-content;
  border-radius: 999px;
  padding: 0.45rem 0.7rem;
  background: rgba(255, 255, 255, 0.9);
  border: 1px solid var(--line);
  font-family: "IBM Plex Mono", "SFMono-Regular", monospace;
}

.recipe-list {
  display: grid;
  gap: 0.55rem;
  padding-left: 1.1rem;
}

.recipe-list li {
  display: flex;
  justify-content: space-between;
  gap: 0.8rem;
}

.technical-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem;
}

.bullet-list,
.number-list {
  margin: 0.9rem 0 0;
  padding-left: 1.2rem;
  color: var(--muted);
  line-height: 1.65;
}

@media (max-width: 960px) {
  .hero,
  .quick-mix-layout,
  .demo-layout,
  .package-strip,
  .usage-grid,
  .validation-grid,
  .resource-strip,
  .technical-flow,
  .technical-grid,
  .how-strip {
    grid-template-columns: 1fr;
  }

  .canvas-stack[data-mode="split"],
  .inspector-grid,
  .swatch-compare,
  .probe-results,
  .quick-mix-meta,
  .quick-mix-add-color,
  .tool-row {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 640px) {
  .page-shell {
    width: min(100% - 1rem, 100%);
  }

  .topbar,
  .mode-bar,
  .usage-tabs,
  .probe-actions,
  .inspector-actions {
    flex-direction: column;
    align-items: stretch;
  }

  .probe-row {
    grid-template-columns: 1fr;
  }
}