:root {
  color-scheme: light;
  --floor: #e8dfcf;
  --floor-deep: #d8cbb7;
  --floor-line: rgba(93, 73, 48, 0.08);
  --rug: rgba(248, 243, 233, 0.78);
  --rug-edge: rgba(103, 78, 50, 0.16);
  --ink: #302a24;
  --muted: #685d52;
  --panel: rgba(255, 252, 246, 0.72);
  --panel-edge: rgba(91, 70, 46, 0.16);
  --panel-hover: rgba(255, 253, 249, 0.94);
  --accent: #8f4321;
  --accent-soft: rgba(169, 91, 50, 0.16);
  --focus: #7d3e20;
  --shadow: rgba(54, 41, 27, 0.16);
  --safe-top: max(env(safe-area-inset-top), 18px);
  --safe-right: max(env(safe-area-inset-right), 18px);
  --safe-bottom: max(env(safe-area-inset-bottom), 18px);
  --safe-left: max(env(safe-area-inset-left), 18px);
}

html.dark {
  color-scheme: dark;
  --floor: #171914;
  --floor-deep: #0f110e;
  --floor-line: rgba(220, 203, 169, 0.045);
  --rug: rgba(39, 42, 34, 0.82);
  --rug-edge: rgba(223, 202, 167, 0.11);
  --ink: #eee7da;
  --muted: #aaa091;
  --panel: rgba(25, 27, 22, 0.72);
  --panel-edge: rgba(235, 217, 187, 0.13);
  --panel-hover: rgba(43, 46, 38, 0.94);
  --accent: #ec9a67;
  --accent-soft: rgba(236, 154, 103, 0.14);
  --focus: #f1b78f;
  --shadow: rgba(0, 0, 0, 0.34);
}

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

html,
body {
  width: 100%;
  height: 100%;
  margin: 0;
  overflow: hidden;
}

body {
  background:
    repeating-linear-gradient(91deg, transparent 0 118px, var(--floor-line) 119px 120px),
    linear-gradient(145deg, var(--floor), var(--floor-deep));
  color: var(--ink);
  font-family: Inter, ui-sans-serif, -apple-system, BlinkMacSystemFont, "PingFang SC", "Noto Sans CJK SC", "Segoe UI", sans-serif;
  -webkit-font-smoothing: antialiased;
  -webkit-tap-highlight-color: transparent;
  transition: background-color 280ms ease, color 280ms ease;
}

body::before {
  position: fixed;
  inset: -40%;
  z-index: 0;
  content: "";
  pointer-events: none;
  opacity: 0.12;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='180' height='180' viewBox='0 0 180 180'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.72' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='.32'/%3E%3C/svg%3E");
  mix-blend-mode: soft-light;
  transform: rotate(2deg);
}

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

button:focus-visible,
a:focus-visible,
select:focus-visible,
#world:focus-visible {
  outline: 2px solid var(--focus);
  outline-offset: 3px;
}

#world:focus-visible {
  outline-offset: -7px;
}

#stage {
  position: fixed;
  inset: 0;
  isolation: isolate;
}

#world {
  position: absolute;
  inset: 0;
  z-index: 1;
  display: block;
  width: 100%;
  height: 100%;
  touch-action: pinch-zoom;
}

@media (pointer: fine) {
  #world { cursor: none; }
}

.topbar {
  position: fixed;
  top: var(--safe-top);
  right: var(--safe-right);
  left: var(--safe-left);
  z-index: 5;
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 20px;
  pointer-events: none;
}

.brand {
  display: flex;
  align-items: flex-start;
  gap: 16px;
  min-width: 0;
}

.home-link,
.controls,
.controls button {
  pointer-events: auto;
}

.home-link {
  display: inline-flex;
  align-items: center;
  min-height: 40px;
  color: var(--ink);
  font-size: 0.64rem;
  font-weight: 700;
  letter-spacing: 0.34em;
  line-height: 1;
  text-decoration: none;
  opacity: 0.74;
  transition: opacity 180ms ease;
}

.home-link:hover { opacity: 1; }

.title-lockup {
  padding-top: 2px;
}

.eyebrow {
  margin: 0 0 5px;
  color: var(--accent);
  font-size: 0.58rem;
  font-weight: 700;
  letter-spacing: 0.24em;
  line-height: 1.2;
  text-transform: uppercase;
}

h1 {
  margin: 0;
  font-family: Georgia, "Songti SC", "Times New Roman", serif;
  font-size: clamp(1.3rem, 2.3vw, 1.85rem);
  font-weight: 500;
  letter-spacing: 0.04em;
  line-height: 1.1;
}

.subtitle {
  margin: 5px 0 0;
  color: var(--muted);
  font-size: 0.68rem;
  letter-spacing: 0.08em;
}

.controls {
  display: flex;
  align-items: center;
  gap: 8px;
}

.appearance-control {
  position: relative;
  pointer-events: auto;
}

.icon-button {
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  padding: 0;
  border: 1px solid var(--panel-edge);
  border-radius: 999px;
  background: var(--panel);
  box-shadow: 0 8px 24px var(--shadow);
  color: var(--ink);
  cursor: pointer;
  font: inherit;
  font-size: 0.68rem;
  font-weight: 700;
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  transition: transform 160ms ease, background 180ms ease, border-color 180ms ease;
}

.icon-button:hover {
  background: var(--panel-hover);
  border-color: color-mix(in srgb, var(--accent) 36%, transparent);
  transform: translateY(-1px);
}

.icon-button:active { transform: scale(0.95); }
.icon-button svg { width: 17px; height: 17px; }

.appearance-panel {
  position: absolute;
  top: calc(100% + 10px);
  right: 0;
  width: min(360px, calc(100vw - var(--safe-left) - var(--safe-right)));
  max-height: min(720px, calc(100vh - var(--safe-top) - 62px));
  padding: 16px;
  overflow: auto;
  border: 1px solid var(--panel-edge);
  border-radius: 18px;
  background: color-mix(in srgb, var(--panel-hover) 92%, transparent);
  box-shadow: 0 18px 54px var(--shadow);
  color: var(--ink);
  pointer-events: auto;
  overscroll-behavior: contain;
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  animation: appearance-in 160ms ease-out;
}

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

@keyframes appearance-in {
  from { opacity: 0; transform: translateY(-5px) scale(0.985); }
}

.appearance-panel-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 14px;
}

.appearance-kicker {
  margin: 0 0 4px;
  color: var(--accent);
  font-size: 0.5rem;
  font-weight: 750;
  letter-spacing: 0.2em;
}

.appearance-panel h2 {
  margin: 0;
  font-family: Georgia, "Songti SC", "Times New Roman", serif;
  font-size: 1.02rem;
  font-weight: 500;
  letter-spacing: 0.04em;
}

.panel-close {
  display: inline-flex;
  flex: 0 0 auto;
  align-items: center;
  justify-content: center;
  width: 30px;
  height: 30px;
  padding: 0;
  border: 1px solid transparent;
  border-radius: 999px;
  background: transparent;
  color: var(--muted);
  cursor: pointer;
}

.panel-close:hover {
  border-color: var(--panel-edge);
  background: var(--accent-soft);
  color: var(--ink);
}

.panel-close svg { width: 14px; height: 14px; }

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

.appearance-visual {
  display: grid;
  gap: 13px;
}

.appearance-preview-wrap {
  display: flex;
  justify-content: center;
  padding: 8px;
  border: 1px solid var(--panel-edge);
  border-radius: 14px;
  background: color-mix(in srgb, var(--panel) 70%, transparent);
}

.appearance-preview {
  display: block;
  width: 168px;
  height: 168px;
  border-radius: 9px;
  background: var(--floor);
}

.appearance-row {
  display: grid;
  gap: 6px;
}

.appearance-row-label {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 8px;
  color: var(--muted);
  font-size: 0.6rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.appearance-row-meta {
  color: var(--accent);
  font-size: 0.58rem;
  font-weight: 650;
  letter-spacing: 0.04em;
  text-transform: none;
}

.appearance-fur-select select {
  width: 100%;
  min-height: 38px;
  padding: 7px 32px 7px 10px;
  border: 1px solid var(--panel-edge);
  border-radius: 10px;
  background: var(--panel);
  color: var(--ink);
  cursor: pointer;
  font: inherit;
  font-size: 0.76rem;
  font-weight: 600;
}

.appearance-fur-select select:hover {
  border-color: color-mix(in srgb, var(--accent) 38%, var(--panel-edge));
  background: var(--panel-hover);
}

.appearance-chip-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 6px;
}

.appearance-chip {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 3px;
  padding: 7px 4px 5px;
  border: 1px solid var(--panel-edge);
  border-radius: 11px;
  background: var(--panel);
  color: var(--ink);
  cursor: pointer;
  font: inherit;
  font-size: 0.6rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  text-align: center;
  transition: transform 140ms ease, background 160ms ease, border-color 160ms ease;
}

.appearance-chip:hover {
  background: var(--panel-hover);
  border-color: color-mix(in srgb, var(--accent) 38%, var(--panel-edge));
  transform: translateY(-1px);
}

.appearance-chip:active { transform: scale(0.96); }

.appearance-chip[aria-checked="true"] {
  border-color: color-mix(in srgb, var(--accent) 64%, transparent);
  background: var(--accent-soft);
  color: var(--accent);
  font-weight: 700;
}

.appearance-chip[disabled] {
  cursor: not-allowed;
  opacity: 0.4;
  pointer-events: none;
}

.appearance-chip-icon {
  width: 26px;
  height: 26px;
  display: block;
}

.appearance-swatch-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(46px, 1fr));
  gap: 6px;
}

.appearance-swatch {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 3px;
  padding: 4px 3px 3px;
  border: 1px solid var(--panel-edge);
  border-radius: 9px;
  background: var(--panel);
  color: var(--ink);
  cursor: pointer;
  font: inherit;
  font-size: 0.54rem;
  font-weight: 600;
  letter-spacing: 0;
  text-align: center;
  overflow: hidden;
  transition: transform 140ms ease, border-color 160ms ease;
}

.appearance-swatch:hover {
  border-color: color-mix(in srgb, var(--accent) 38%, var(--panel-edge));
  transform: translateY(-1px);
}

.appearance-swatch:active { transform: scale(0.95); }

.appearance-swatch[aria-checked="true"] {
  border-color: color-mix(in srgb, var(--accent) 72%, transparent);
  box-shadow: 0 0 0 2px var(--accent-soft);
}

.appearance-swatch-tile {
  width: 100%;
  height: 26px;
  border-radius: 5px;
  display: block;
}

.appearance-swatch-label {
  display: block;
  width: 100%;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.appearance-segmented {
  display: flex;
  gap: 4px;
  padding: 3px;
  border: 1px solid var(--panel-edge);
  border-radius: 11px;
  background: color-mix(in srgb, var(--panel) 70%, transparent);
}

.appearance-seg {
  flex: 1 1 0;
  min-height: 30px;
  padding: 5px 6px;
  border: 1px solid transparent;
  border-radius: 8px;
  background: transparent;
  color: var(--muted);
  cursor: pointer;
  font: inherit;
  font-size: 0.62rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  text-align: center;
  transition: background 140ms ease, color 140ms ease;
}

.appearance-seg:hover {
  color: var(--ink);
  background: color-mix(in srgb, var(--panel-hover) 60%, transparent);
}

.appearance-seg[aria-checked="true"] {
  background: var(--accent-soft);
  border-color: color-mix(in srgb, var(--accent) 40%, transparent);
  color: var(--accent);
  font-weight: 700;
}

.appearance-seg[disabled] {
  cursor: not-allowed;
  opacity: 0.38;
  pointer-events: none;
}

.appearance-empty {
  margin: 4px 2px 0;
  color: var(--muted);
  font-size: 0.6rem;
  font-style: italic;
}

.appearance-actions {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
  margin-top: 14px;
}

.appearance-actions button {
  min-height: 36px;
  padding: 7px 10px;
  border: 1px solid var(--panel-edge);
  border-radius: 999px;
  background: var(--panel);
  color: var(--ink);
  cursor: pointer;
  font: inherit;
  font-size: 0.66rem;
  font-weight: 650;
}

.appearance-actions button:first-child {
  border-color: color-mix(in srgb, var(--accent) 32%, var(--panel-edge));
  background: var(--accent-soft);
  color: var(--accent);
}

.appearance-actions button:hover { background: var(--panel-hover); }

.appearance-source {
  margin: 12px 2px 0;
  color: var(--muted);
  font-size: 0.6rem;
  line-height: 1.5;
}

.pause-icon,
.play-icon,
.sun-icon,
.moon-icon {
  position: absolute;
  transition: opacity 180ms ease, transform 220ms ease;
}

.play-icon,
.sun-icon { opacity: 0; transform: scale(0.7) rotate(-25deg); }
.paused .pause-icon { opacity: 0; transform: scale(0.7); }
.paused .play-icon { opacity: 1; transform: scale(1) rotate(0); }
.dark .moon-icon { opacity: 0; transform: scale(0.7) rotate(25deg); }
.dark .sun-icon { opacity: 1; transform: scale(1) rotate(0); }

.behavior-chip {
  position: fixed;
  right: calc(var(--safe-right) + 2px);
  bottom: calc(var(--safe-bottom) + 2px);
  z-index: 4;
  display: flex;
  align-items: center;
  gap: 5px;
  padding: 2px 3px;
  color: var(--muted);
  font-size: 0.54rem;
  font-weight: 550;
  letter-spacing: 0.08em;
  line-height: 1.2;
  pointer-events: none;
  text-shadow: 0 1px 8px var(--panel);
}

.behavior-dot {
  width: 3px;
  height: 3px;
  border-radius: 50%;
  background: var(--accent);
  opacity: 0.68;
  transition: transform 180ms ease;
}

body[data-behavior="chase"] .behavior-dot {
  animation: alert-pulse 620ms ease-in-out infinite alternate;
}

@keyframes alert-pulse {
  to { transform: scale(1.42); }
}

.error-card,
noscript {
  position: fixed;
  top: 50%;
  left: 50%;
  z-index: 20;
  max-width: min(390px, calc(100vw - 40px));
  padding: 18px 22px;
  border: 1px solid var(--panel-edge);
  border-radius: 16px;
  background: var(--panel-hover);
  box-shadow: 0 18px 48px var(--shadow);
  color: var(--ink);
  font-size: 0.84rem;
  line-height: 1.6;
  text-align: center;
  transform: translate(-50%, -50%);
}

.error-card[hidden] { display: none; }

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

body.paused #world { filter: saturate(0.78); }
body.paused .behavior-dot { animation: none; opacity: 0.42; }

@media (max-width: 700px) {
  :root {
    --safe-top: max(env(safe-area-inset-top), 12px);
    --safe-right: max(env(safe-area-inset-right), 12px);
    --safe-bottom: max(env(safe-area-inset-bottom), 12px);
    --safe-left: max(env(safe-area-inset-left), 12px);
  }

  .brand { gap: 10px; }
  .home-link { min-height: 36px; font-size: 0.56rem; letter-spacing: 0.24em; }
  .eyebrow { font-size: 0.48rem; letter-spacing: 0.17em; }
  h1 { font-size: 1.16rem; }
  .subtitle { display: none; }
  .controls { gap: 6px; }
  .icon-button { width: 36px; height: 36px; }
  .appearance-panel {
    position: fixed;
    top: calc(var(--safe-top) + 46px);
    right: var(--safe-right);
    width: min(330px, calc(100vw - var(--safe-left) - var(--safe-right)));
    max-height: calc(100vh - var(--safe-top) - var(--safe-bottom) - 54px);
  }
  .appearance-preview { width: 144px; height: 144px; }
  .appearance-chip-icon { width: 22px; height: 22px; }
  .appearance-swatch-grid { grid-template-columns: repeat(auto-fill, minmax(42px, 1fr)); }
}

@media (max-width: 380px) {
  .appearance-chip-grid { grid-template-columns: repeat(3, 1fr); }
  .appearance-swatch-grid { grid-template-columns: repeat(4, 1fr); }
}

@media (max-width: 430px) {
  .title-lockup { padding-top: 7px; }
  .title-lockup .eyebrow { display: none; }
  .title-lockup h1 { font-size: 0.96rem; letter-spacing: 0.02em; }
}

@media (max-width: 380px) {
  .title-lockup { display: none; }
  .controls { gap: 4px; }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
  }
}