:root {
  color-scheme: light;
  --paper: #f0f2e9;
  --card: #fffef9;
  --ink: #102d32;
  --muted: #506363;
  --line: #cad2c7;
  --canvas: #081b27;
  --accent: #16616b;
  --focus: #005f65;
  --mono: ui-monospace, SFMono-Regular, Consolas, "Liberation Mono", monospace;
  font-family: ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 16px;
  font-synthesis: none;
  text-rendering: optimizeLegibility;
  -webkit-text-size-adjust: 100%;
  background: var(--paper);
  color: var(--ink);
}

* { box-sizing: border-box; }

html { scroll-padding-top: 1.5rem; }

body {
  margin: 0;
  min-width: 280px;
  line-height: 1.5;
}

button, input, output { font: inherit; }

button, input, a { -webkit-tap-highlight-color: transparent; }

button { cursor: pointer; }

a { color: inherit; }

button, input, canvas, a { touch-action: manipulation; }

:focus-visible {
  outline: 3px solid var(--focus);
  outline-offset: 4px;
}

::selection { background: #c5e2d2; color: #102d32; }

.page-width {
  width: min(1360px, calc(100% - 72px));
  margin-inline: auto;
}

.skip-link {
  position: fixed;
  z-index: 20;
  top: 12px;
  left: 12px;
  padding: 12px 18px;
  border: 2px solid var(--ink);
  border-radius: 8px;
  background: var(--card);
  color: var(--ink);
  font-weight: 700;
  transform: translateY(-160%);
}

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

.site-header {
  display: flex;
  align-items: center;
  gap: 28px;
  min-height: 98px;
  border-bottom: 1px solid var(--line);
}

.wordmark {
  flex-shrink: 0;
  font-size: 38px;
  font-weight: 800;
  letter-spacing: -3px;
  line-height: 1;
  text-decoration: none;
}

.wordmark-dot { color: #ad432b; }

.header-note {
  margin: 0;
  color: var(--muted);
  font-size: 13px;
}

.site-header nav {
  display: flex;
  flex-wrap: wrap;
  gap: 2px;
  margin-left: auto;
}

.site-header nav a {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 8px 15px;
  border-radius: 6px;
  font-size: 13px;
  font-weight: 650;
  text-decoration: none;
}

.site-header nav a:hover,
.site-header nav a:focus-visible { background: #dfe7dc; }

.intro {
  display: grid;
  grid-template-columns: 1.4fr 1fr;
  align-items: end;
  gap: 60px;
  padding-block: 58px 53px;
}

.eyebrow {
  margin: 0;
  font-family: var(--mono);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 1.7px;
  text-transform: uppercase;
}

.intro .eyebrow { margin-bottom: 17px; color: #466358; }

h1 {
  margin: 0;
  font-size: clamp(38px, 4.6vw, 65px);
  font-weight: 650;
  letter-spacing: -2.8px;
  line-height: 1.07;
}

.intro-aside {
  max-width: 380px;
  justify-self: end;
  padding-bottom: 3px;
}

.intro-aside > p:first-child {
  margin: 0 0 19px;
  font-size: 17px;
  line-height: 1.7;
}

.quiet-note {
  margin: 0;
  color: var(--muted);
  font-size: 12px;
}

.playground-heading {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 15px;
  padding-top: 18px;
  border-top: 1px solid var(--line);
}

.playground-heading > p:last-child {
  margin: 0;
  color: var(--muted);
  font-size: 12px;
}

.toy-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  align-items: stretch;
  gap: 24px;
  scroll-margin-top: 20px;
  border-radius: 18px;
}

.toy-card {
  min-width: 0;
  padding: 26px;
  border: 1px solid #c7d0c7;
  border-radius: 18px;
  background: var(--card);
  box-shadow: 0 3px 0 rgb(16 45 50 / 3%);
  scroll-margin-top: 20px;
}

.toy-wave { --accent: #16616b; }
.toy-steps { --accent: #a13e28; }
.toy-glyph { --accent: #654b87; }
.toy-orbit { --accent: #47602a; }

.toy-heading {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.toy-category {
  display: flex;
  align-items: center;
  gap: 10px;
  margin: 0 0 6px;
  color: var(--accent);
  font-family: var(--mono);
  font-size: 10px;
  font-weight: 600;
  letter-spacing: 1.1px;
  text-transform: uppercase;
}

.toy-number {
  display: inline-block;
  padding-right: 10px;
  border-right: 1px solid #b2bfb5;
}

h2 {
  margin: 0;
  font-size: clamp(24px, 2.1vw, 30px);
  font-weight: 650;
  letter-spacing: -1px;
  line-height: 1.2;
}

.toy-medium {
  padding: 4px 9px;
  border: 1px solid var(--line);
  border-radius: 5px;
  color: var(--muted);
  font-family: var(--mono);
  font-size: 10px;
  white-space: nowrap;
}

.toy-description {
  min-height: 42px;
  margin: 12px 0 16px;
  color: var(--muted);
  font-size: 13px;
  line-height: 1.6;
}

.canvas-frame {
  position: relative;
  overflow: hidden;
  aspect-ratio: 16 / 9;
  border: 1px solid var(--canvas);
  border-radius: 11px;
  background: var(--canvas);
  isolation: isolate;
}

canvas {
  display: block;
  width: 100%;
  height: 100%;
  color: #ecf4ec;
  font-size: 14px;
}

canvas[tabindex="0"] {
  cursor: crosshair;
  touch-action: none;
}

canvas:focus-visible {
  outline: 3px solid #eefacb;
  outline-offset: -6px;
  border-radius: 10px;
}

canvas:active { cursor: grabbing; }

.canvas-caption {
  position: absolute;
  right: 14px;
  bottom: 11px;
  left: 14px;
  display: flex;
  justify-content: space-between;
  gap: 12px;
  color: #c3d2d4;
  font-family: var(--mono);
  font-size: 9px;
  letter-spacing: 0.4px;
  line-height: 1.4;
  pointer-events: none;
}

.canvas-caption span {
  padding: 3px 6px;
  border-radius: 3px;
  background: #081b27;
}

.toy-controls {
  display: grid;
  gap: 17px;
  padding-top: 22px;
}

.control-pair {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 24px;
}

.range-control, .text-control { min-width: 0; }

.control-heading {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 10px;
  min-height: 23px;
}

.control-heading label {
  font-size: 13px;
  font-weight: 650;
}

.control-reading {
  display: inline-flex;
  align-items: baseline;
  gap: 4px;
  color: var(--accent);
  font-family: var(--mono);
  font-size: 13px;
  font-variant-numeric: tabular-nums;
  font-weight: 600;
  white-space: nowrap;
}

.unit { color: var(--muted); font-size: 10px; font-weight: 400; }

input[type="range"] {
  display: block;
  width: 100%;
  height: 44px;
  margin: 0;
  padding: 0;
  border: 0;
  border-radius: 4px;
  appearance: none;
  -webkit-appearance: none;
  background: transparent;
  accent-color: var(--accent);
  cursor: pointer;
}

input[type="range"]::-webkit-slider-runnable-track {
  height: 5px;
  border-radius: 5px;
  background: #d4dcd3;
}

input[type="range"]::-moz-range-track {
  height: 5px;
  border-radius: 5px;
  background: #d4dcd3;
}

input[type="range"]::-moz-range-progress {
  height: 5px;
  border-radius: 5px;
  background: var(--accent);
}

input[type="range"]::-webkit-slider-thumb {
  width: 20px;
  height: 20px;
  margin-top: -7.5px;
  border: 3px solid var(--card);
  border-radius: 50%;
  appearance: none;
  -webkit-appearance: none;
  background: var(--accent);
  box-shadow: 0 0 0 1.5px var(--accent);
}

input[type="range"]::-moz-range-thumb {
  width: 14px;
  height: 14px;
  border: 3px solid var(--card);
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 0 1.5px var(--accent);
}

.range-ends {
  display: flex;
  justify-content: space-between;
  margin-top: -5px;
  color: var(--muted);
  font-family: var(--mono);
  font-size: 10px;
}

.control-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  padding-top: 15px;
  border-top: 1px solid #e0e5db;
}

.control-footer > p {
  max-width: 330px;
  margin: 0;
  color: var(--muted);
  font-size: 12px;
  line-height: 1.6;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  min-height: 44px;
  padding: 10px 14px;
  border: 1px solid #a0aea3;
  border-radius: 7px;
  background: var(--card);
  color: var(--ink);
  font-size: 12px;
  font-weight: 650;
  line-height: 1.3;
  text-align: center;
  white-space: nowrap;
  transition: background-color 120ms ease, border-color 120ms ease;
}

.button-primary {
  border-color: var(--accent);
  background: var(--accent);
  color: #fffef9;
}

.button-quiet:hover { border-color: var(--ink); background: #e9eee4; }
.button-primary:hover { border-color: var(--ink); background: var(--ink); }
.button:active { box-shadow: inset 0 0 0 2px currentColor; }

.button[aria-pressed="true"] {
  border-color: var(--ink);
  background: var(--ink);
  color: var(--card);
}

.button:disabled { cursor: not-allowed; opacity: 0.55; }

.button-pair, .transport {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.button-pair { flex-shrink: 0; }

.keyboard-hint {
  margin: 0;
  color: var(--muted);
  font-size: 11px;
  line-height: 1.8;
}

kbd {
  display: inline-block;
  min-width: 19px;
  padding: 0 4px;
  border: 1px solid #c2cec3;
  border-bottom-width: 2px;
  border-radius: 4px;
  background: #f2f4ed;
  color: #354e4e;
  font-family: var(--mono);
  font-size: 10px;
  line-height: 1.6;
  text-align: center;
}

.steps-control-row {
  display: grid;
  grid-template-columns: minmax(120px, 1fr) auto;
  align-items: center;
  gap: 22px;
}

.sound-readout {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 10px 18px;
  padding: 13px 0;
  border-top: 1px solid #e0e5db;
  border-bottom: 1px solid #e0e5db;
  font-family: var(--mono);
  font-size: 10px;
}

.sound-state { display: flex; flex-wrap: wrap; align-items: baseline; gap: 10px; }
.sound-label { color: var(--muted); text-transform: uppercase; letter-spacing: 1px; }
#audio-state { color: var(--ink); }

.level-readout { display: flex; align-items: center; gap: 10px; color: var(--muted); }

meter {
  display: block;
  width: 80px;
  height: 10px;
  border: 0;
  border-radius: 2px;
  background: #d4dcd3;
  accent-color: var(--accent);
}

meter::-webkit-meter-bar {
  height: 6px;
  border: 0;
  border-radius: 2px;
  background: #d4dcd3;
}

meter::-webkit-meter-optimum-value { border-radius: 2px; background: var(--accent); }
meter::-moz-meter-bar { background: var(--accent); }

.audio-note { margin: 0; color: var(--muted); font-size: 11px; line-height: 1.8; }

.field-hint { color: var(--muted); font-size: 10px; }

input[type="text"] {
  display: block;
  width: 100%;
  min-height: 48px;
  margin-top: 8px;
  padding: 10px 13px;
  border: 1px solid #a8b6aa;
  border-radius: 7px;
  background: #f6f7f0;
  color: var(--ink);
  font-family: var(--mono);
  font-size: 18px;
  letter-spacing: 3px;
}

input[type="text"]:hover { border-color: var(--accent); }

.playground-status {
  display: flex;
  align-items: baseline;
  gap: 18px;
  margin-top: 26px;
  padding: 18px 0;
  border-block: 1px solid var(--line);
}

.status-label {
  flex-shrink: 0;
  color: #466358;
  font-family: var(--mono);
  font-size: 10px;
  font-weight: 600;
  letter-spacing: 1px;
  text-transform: uppercase;
}

#status-line {
  min-width: 0;
  margin: 0;
  color: var(--ink);
  font-size: 12px;
  overflow-wrap: anywhere;
}

.noscript-notice {
  padding: 18px;
  border: 2px solid #a13e28;
  border-radius: 8px;
  color: #702915;
  background: var(--card);
  font-size: 14px;
}

.site-footer {
  display: flex;
  justify-content: space-between;
  gap: 24px;
  padding-block: 23px 36px;
  color: var(--muted);
  font-size: 11px;
  line-height: 1.7;
}

.site-footer p { margin: 0; }
.site-footer strong { color: var(--ink); font-weight: 600; }

@media (max-width: 1180px) {
  .page-width { width: calc(100% - 48px); }
  .toy-card { padding: 22px; }
  .toy-grid { gap: 20px; }
  .steps-control-row { grid-template-columns: 1fr; gap: 16px; }
  .transport { justify-content: flex-start; }
  .toy-orbit .control-footer { align-items: flex-start; flex-direction: column; gap: 12px; }
  .intro { gap: 36px; }
}

@media (max-width: 850px) {
  .header-note { display: none; }
  .intro { padding-block: 40px; grid-template-columns: 1.2fr 1fr; gap: 30px; }
  h1 { font-size: clamp(36px, 5.5vw, 48px); letter-spacing: -1.9px; }
  .intro-aside > p:first-child { font-size: 14px; }
  .intro-aside .quiet-note { font-size: 11px; }
  .toy-grid { grid-template-columns: 1fr; }
  .toy-card { padding: 26px; }
  .toy-description { min-height: 0; margin-bottom: 20px; }
  .steps-control-row { grid-template-columns: minmax(120px, 1fr) auto; gap: 24px; }
  .toy-orbit .control-footer { align-items: center; flex-direction: row; }
  .canvas-frame { aspect-ratio: 16 / 8; }
  .site-footer { flex-direction: column; gap: 8px; }
}

@media (max-width: 580px) {
  .page-width { width: calc(100% - 32px); }
  .site-header { min-height: 82px; gap: 12px; }
  .wordmark { font-size: 33px; }
  .site-header nav a { padding-inline: 9px; font-size: 12px; }
  .intro { grid-template-columns: 1fr; gap: 22px; padding-block: 32px; }
  h1 { font-size: clamp(34px, 8.5vw, 47px); letter-spacing: -1.8px; }
  .intro .eyebrow { margin-bottom: 13px; font-size: 10px; }
  .intro-aside { max-width: 400px; justify-self: start; padding: 0; }
  .intro-aside > p:first-child { margin-bottom: 12px; line-height: 1.65; }
  .playground-heading { align-items: flex-start; gap: 12px; padding-top: 15px; }
  .playground-heading .eyebrow { font-size: 10px; }
  .playground-heading > p:last-child { max-width: 140px; font-size: 10px; text-align: right; }
  .toy-grid { gap: 18px; }
  .toy-card { padding: 20px 16px; border-radius: 14px; }
  .toy-category { font-size: 9px; letter-spacing: 0.8px; }
  .toy-medium { font-size: 9px; padding-inline: 6px; }
  h2 { font-size: 26px; }
  .toy-description { font-size: 12px; margin-top: 10px; margin-bottom: 17px; }
  .canvas-frame { aspect-ratio: 4 / 3; border-radius: 8px; }
  .canvas-caption { right: 8px; bottom: 7px; left: 8px; gap: 5px; font-size: 8px; }
  .canvas-caption span { padding-inline: 3px; }
  .toy-controls { padding-top: 19px; gap: 17px; }
  .control-pair { gap: 20px; }
  .control-heading { gap: 6px; }
  .control-heading label { font-size: 12px; }
  .control-reading { font-size: 12px; }
  .control-footer { align-items: flex-start; flex-direction: column; gap: 12px; }
  .control-footer > p { max-width: none; }
  .steps-control-row { grid-template-columns: 1fr; gap: 16px; }
  .transport .button-primary { flex-grow: 1; }
  .transport .button-quiet { flex-grow: 0.5; }
  .toy-orbit .control-footer { align-items: flex-start; flex-direction: column; }
  .button-pair { width: 100%; }
  .button-pair .button { flex: 1; }
  .playground-status { align-items: flex-start; flex-direction: column; gap: 7px; margin-top: 22px; }
  .site-footer { padding-block: 20px 28px; }
}

@media (max-width: 360px) {
  .page-width { width: calc(100% - 24px); }
  .site-header { flex-wrap: wrap; justify-content: space-between; gap: 6px; padding-block: 13px 9px; }
  .site-header nav { margin-left: 0; gap: 0; }
  .site-header nav a { padding-inline: 7px; }
  .toy-card { padding-inline: 13px; }
  .toy-medium { display: none; }
  .control-pair { gap: 15px; }
  .field-hint { font-size: 9px; }
  .canvas-caption { font-size: 7px; }
  .keyboard-hint { font-size: 10px; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation: none !important;
    transition: none !important;
    scroll-behavior: auto !important;
  }
}

@media (forced-colors: active) {
  .toy-card, .canvas-frame, .button, input[type="text"], kbd { border-color: CanvasText; }
  .toy-card { box-shadow: none; }
  .canvas-caption { color: CanvasText; }
  .canvas-caption span { background: Canvas; }
  canvas:focus-visible { outline-color: Highlight; }
  .button[aria-pressed="true"] { outline: 2px solid Highlight; outline-offset: -4px; }
  input[type="range"] { appearance: auto; -webkit-appearance: auto; }
  input[type="range"]::-webkit-slider-thumb { forced-color-adjust: auto; }
  input[type="range"]::-moz-range-thumb { forced-color-adjust: auto; }
}