:root {
  color-scheme: dark;
  --ink: #f7fbff;
  --muted: rgba(226, 235, 255, 0.58);
  --hairline: rgba(230, 240, 255, 0.14);
  --panel: rgba(5, 7, 18, 0.72);
  --cyan: #61dcff;
  --violet: #a68cff;
  font-family: Inter, ui-sans-serif, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background: #000;
}

* { box-sizing: border-box; }

html,
body {
  width: 100%;
  min-width: 320px;
  height: 100%;
  margin: 0;
  overflow: hidden;
  background: #000;
}

body {
  color: var(--ink);
  overscroll-behavior: none;
}

button,
a { font: inherit; }

button { color: inherit; }

.orb-stage {
  position: relative;
  isolation: isolate;
  width: 100%;
  height: 100%;
  min-height: 520px;
  overflow: hidden;
  background:
    radial-gradient(circle at 50% 45%, rgba(20, 23, 65, 0.22), transparent 38%),
    #000;
}

#gl {
  position: absolute;
  z-index: 0;
  inset: 0;
  display: block;
  width: 100%;
  height: 100%;
  touch-action: none;
  cursor: grab;
}

#gl:active { cursor: grabbing; }

#orb-face {
  --face-shift-x: 0px;
  --face-shift-y: 0px;
  --face-tilt: 0deg;
  position: absolute;
  z-index: 2;
  top: 50%;
  left: 50%;
  pointer-events: none;
  opacity: 0.9;
  filter: drop-shadow(0 2px 5px rgba(0, 2, 14, 0.58)) drop-shadow(0 -1px 3px rgba(170, 224, 255, 0.1));
  mix-blend-mode: luminosity;
  transform: translate(calc(-50% + var(--face-shift-x)), calc(-50% + var(--face-shift-y))) rotate(var(--face-tilt));
  transition: transform 180ms cubic-bezier(0.2, 0.75, 0.25, 1);
  will-change: transform;
}

.orb-header {
  position: absolute;
  z-index: 5;
  top: max(22px, env(safe-area-inset-top));
  right: 28px;
  left: 28px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  pointer-events: none;
}

.back-link,
.state-readout {
  pointer-events: auto;
  border: 1px solid var(--hairline);
  background: rgba(4, 6, 14, 0.46);
  box-shadow: inset 0 1px rgba(255, 255, 255, 0.045);
  backdrop-filter: blur(18px) saturate(130%);
  -webkit-backdrop-filter: blur(18px) saturate(130%);
}

.back-link {
  display: inline-flex;
  gap: 10px;
  align-items: center;
  min-height: 42px;
  padding: 0 15px;
  border-radius: 12px;
  color: rgba(246, 249, 255, 0.82);
  font-size: 13px;
  font-weight: 650;
  letter-spacing: 0.02em;
  text-decoration: none;
  transition: border-color 160ms ease, background 160ms ease, color 160ms ease;
}

.back-link:hover {
  color: #fff;
  border-color: rgba(171, 220, 255, 0.33);
  background: rgba(12, 15, 31, 0.72);
}

.back-link span:first-child {
  color: var(--cyan);
  font-size: 17px;
}

.state-readout {
  display: grid;
  grid-template-columns: auto auto;
  gap: 1px 9px;
  align-items: center;
  min-width: 126px;
  padding: 9px 14px 9px 12px;
  border-radius: 12px;
}

.state-pulse {
  grid-row: 1 / 3;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--cyan);
  box-shadow: 0 0 10px rgba(97, 220, 255, 0.82);
}

#current-state-zh {
  font-size: 13px;
  font-weight: 700;
  line-height: 1.1;
}

#current-state-en {
  color: var(--muted);
  font-size: 10px;
  line-height: 1.1;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.expression-dock {
  position: absolute;
  z-index: 6;
  right: 24px;
  bottom: max(20px, env(safe-area-inset-bottom));
  left: 24px;
  width: min(1080px, calc(100% - 48px));
  margin: auto;
  padding: 18px 18px 13px;
  border: 1px solid rgba(225, 236, 255, 0.15);
  border-radius: 20px;
  background: linear-gradient(145deg, rgba(12, 14, 29, 0.79), rgba(3, 5, 12, 0.68));
  box-shadow: 0 22px 60px rgba(0, 0, 0, 0.46), inset 0 1px rgba(255, 255, 255, 0.055);
  backdrop-filter: blur(24px) saturate(140%);
  -webkit-backdrop-filter: blur(24px) saturate(140%);
}

.dock-heading {
  display: flex;
  gap: 20px;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 14px;
}

.eyebrow {
  margin: 0;
  color: var(--cyan);
  font-size: 10px;
  font-weight: 750;
  letter-spacing: 0.12em;
}

.dock-actions {
  display: flex;
  gap: 7px;
  align-items: center;
}

.eye-settings {
  position: relative;
}

.eye-settings > summary {
  display: inline-flex;
  align-items: center;
  list-style: none;
}

.eye-settings > summary::-webkit-details-marker { display: none; }

.eye-settings[open] > summary {
  color: #fff;
  border-color: rgba(107, 211, 255, 0.34);
  background: rgba(74, 157, 255, 0.11);
}

.eye-settings[open] > summary span {
  color: var(--cyan);
  transform: rotate(90deg);
}

.eye-config-panel {
  position: absolute;
  right: 0;
  bottom: calc(100% + 12px);
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px 12px;
  width: 340px;
  max-width: calc(100vw - 32px);
  padding: 16px;
  border: 1px solid rgba(222, 237, 255, 0.18);
  border-radius: 16px;
  background: rgba(5, 8, 20, 0.94);
  box-shadow: 0 24px 60px rgba(0, 0, 0, 0.52), inset 0 1px rgba(255, 255, 255, 0.055);
  backdrop-filter: blur(24px) saturate(135%);
  -webkit-backdrop-filter: blur(24px) saturate(135%);
}

.eye-config-heading {
  display: flex;
  grid-column: 1 / -1;
  align-items: start;
  justify-content: space-between;
  padding-bottom: 11px;
  border-bottom: 1px solid rgba(221, 235, 255, 0.1);
}

.eye-config-heading > div { display: grid; gap: 3px; }
.eye-config-heading strong { font-size: 14px; }
.eye-config-heading small { color: var(--muted); font-size: 10px; }

.eye-config-heading button {
  padding: 0;
  border: 0;
  color: rgba(180, 216, 255, 0.7);
  font-size: 11px;
  background: transparent;
  cursor: pointer;
}

.eye-config-heading button:hover { color: #fff; }

.eye-field {
  display: grid;
  gap: 7px;
  min-width: 0;
  color: rgba(234, 241, 255, 0.68);
  font-size: 11px;
}

.eye-field-wide { grid-column: 1 / -1; }

.eye-field > span {
  display: flex;
  justify-content: space-between;
}

.eye-field output {
  color: rgba(145, 213, 255, 0.72);
  font: 9px/1 ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
}

.eye-field select {
  width: 100%;
  height: 36px;
  padding: 0 10px;
  border: 1px solid rgba(220, 233, 255, 0.14);
  border-radius: 9px;
  outline: none;
  color: rgba(246, 249, 255, 0.9);
  font-size: 12px;
  background: #101426;
}

.eye-field input[type="color"] {
  width: 100%;
  height: 36px;
  padding: 4px;
  border: 1px solid rgba(220, 233, 255, 0.14);
  border-radius: 9px;
  background: #101426;
  cursor: pointer;
}

.eye-field input[type="color"]::-webkit-color-swatch-wrapper { padding: 0; }
.eye-field input[type="color"]::-webkit-color-swatch { border: 0; border-radius: 6px; }

.eye-field input[type="range"] {
  width: 100%;
  height: 16px;
  margin: 0;
  accent-color: var(--cyan);
  cursor: pointer;
}

.eye-field select:focus-visible,
.eye-field input:focus-visible,
.eye-config-heading button:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 2px;
}

.utility-button,
.expression-button {
  border: 1px solid var(--hairline);
  outline: none;
  background: rgba(255, 255, 255, 0.035);
  cursor: pointer;
  transition: color 150ms ease, border-color 150ms ease, background 150ms ease, transform 150ms ease;
}

.utility-button {
  min-height: 36px;
  padding: 0 12px;
  border-radius: 10px;
  color: rgba(241, 246, 255, 0.72);
  font-size: 12px;
  font-weight: 620;
  white-space: nowrap;
}

.utility-button span { color: rgba(255, 255, 255, 0.38); }

.utility-button:hover,
.utility-button.is-on {
  color: #fff;
  border-color: rgba(107, 211, 255, 0.34);
  background: rgba(74, 157, 255, 0.11);
}

.utility-button.is-on span { color: var(--cyan); }

.expression-list {
  display: flex;
  gap: 7px;
  width: 100%;
  padding: 1px 1px 7px;
  overflow-x: auto;
  scrollbar-color: rgba(163, 183, 224, 0.32) transparent;
  scrollbar-width: thin;
  scroll-snap-type: x proximity;
}

.expression-list::-webkit-scrollbar { height: 4px; }
.expression-list::-webkit-scrollbar-track { background: transparent; }
.expression-list::-webkit-scrollbar-thumb { border-radius: 99px; background: rgba(163, 183, 224, 0.3); }

.expression-button {
  display: grid;
  flex: 0 0 auto;
  min-width: 88px;
  min-height: 51px;
  padding: 8px 11px;
  border-radius: 12px;
  color: rgba(242, 246, 255, 0.7);
  text-align: left;
  scroll-snap-align: start;
}

.expression-button strong {
  font-size: 13px;
  font-weight: 680;
  line-height: 1.2;
}

.expression-button small {
  margin-top: 3px;
  color: rgba(218, 226, 244, 0.4);
  font-size: 9px;
  letter-spacing: 0.08em;
  line-height: 1;
  text-transform: uppercase;
}

.expression-button:hover {
  color: #fff;
  border-color: rgba(171, 206, 255, 0.3);
  background: rgba(255, 255, 255, 0.075);
  transform: translateY(-1px);
}

.expression-button[aria-selected="true"] {
  color: #06101e;
  border-color: transparent;
  background: linear-gradient(135deg, #effaff 0%, #a7dcff 52%, #c5b5ff 100%);
  box-shadow: 0 5px 20px rgba(89, 181, 255, 0.17);
}

.expression-button[aria-selected="true"] small { color: rgba(10, 24, 50, 0.56); }

.utility-button:focus-visible,
.expression-button:focus-visible,
.back-link:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 3px;
}

.interaction-hint {
  display: flex;
  gap: 9px;
  align-items: center;
  justify-content: center;
  min-height: 18px;
  color: rgba(216, 226, 247, 0.42);
  font-size: 10px;
  letter-spacing: 0.04em;
}

.interaction-hint i {
  width: 2px;
  height: 2px;
  border-radius: 50%;
  background: rgba(178, 206, 255, 0.38);
}

.webgl-fallback {
  position: absolute;
  z-index: 8;
  top: 50%;
  left: 50%;
  margin: 0;
  color: rgba(255, 255, 255, 0.72);
  font-size: 14px;
  transform: translate(-50%, -50%);
}

@media (max-width: 760px) {
  .orb-stage { min-height: 580px; }

  .orb-header {
    top: max(12px, env(safe-area-inset-top));
    right: 12px;
    left: 12px;
  }

  .back-link { min-height: 38px; padding: 0 12px; }
  .state-readout { min-width: 112px; padding: 8px 11px; }

  .expression-dock {
    right: 10px;
    bottom: max(10px, env(safe-area-inset-bottom));
    left: 10px;
    width: calc(100% - 20px);
    padding: 14px 12px 10px;
    border-radius: 16px;
  }

  .dock-heading { display: block; margin-bottom: 11px; }
  .dock-actions { flex-wrap: wrap; margin-top: 11px; }
  .utility-button { flex: 0 0 auto; min-height: 34px; }
  .eye-config-panel { right: auto; left: 0; }
  .expression-button { min-width: 82px; min-height: 49px; padding: 7px 10px; }
  .interaction-hint { justify-content: flex-start; overflow: hidden; white-space: nowrap; }
}

@media (max-height: 680px) and (min-width: 761px) {
  .expression-dock { padding-top: 13px; }
  .dock-heading { margin-bottom: 10px; }
  .interaction-hint { display: none; }
}

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