:root {
  --ink: #f7ebd4;
  --ink-dim: #cca87c;
  --ink-muted: #967a5b;
  --gold: #dfa73f;
  --gold-hi: #ffd885;
  --gold-glow: rgba(223, 167, 63, 0.35);
  --panel-bg: linear-gradient(145deg, rgba(24, 13, 6, 0.88) 0%, rgba(12, 6, 2, 0.82) 100%);
  --panel-border: rgba(223, 167, 63, 0.28);
  --panel-border-top: rgba(255, 222, 155, 0.45);
  --serif: 'Cormorant Garamond', 'Iowan Old Style', Georgia, serif;
  --sans: 'Inter', system-ui, -apple-system, 'Segoe UI', sans-serif;
}

* {
  box-sizing: border-box;
}

[hidden] {
  display: none !important;
}

html, body {
  margin: 0;
  height: 100%;
  overflow: hidden;
  background: #090403;
  color: var(--ink);
  font-family: var(--sans);
  font-size: 14px;
  -webkit-font-smoothing: antialiased;
}

#stage {
  position: fixed;
  inset: 0;
  width: 100vw;
  height: 100vh;
  display: block;
  cursor: crosshair;
}

#video { display: none; }

/* Global Glass Panel */
.panel {
  background: var(--panel-bg);
  border: 1px solid var(--panel-border);
  border-top-color: var(--panel-border-top);
  border-radius: 16px;
  backdrop-filter: blur(16px) saturate(1.3);
  -webkit-backdrop-filter: blur(16px) saturate(1.3);
  box-shadow: 
    0 24px 70px rgba(0, 0, 0, 0.65),
    0 4px 20px rgba(0, 0, 0, 0.4),
    inset 0 1px 0 rgba(255, 230, 170, 0.12);
}

/* Intro Overlay */
.intro {
  position: fixed;
  left: max(20px, 3.5vw);
  top: 50%;
  transform: translateY(-50%);
  width: min(440px, calc(100vw - 40px));
  max-height: calc(100vh - 100px);
  padding: 30px;
  overflow-y: auto;
  transition: opacity 0.45s cubic-bezier(0.16, 1, 0.3, 1), transform 0.45s cubic-bezier(0.16, 1, 0.3, 1);
  z-index: 10;
}

.intro::-webkit-scrollbar {
  width: 4px;
}
.intro::-webkit-scrollbar-thumb {
  background: rgba(223, 167, 63, 0.3);
  border-radius: 4px;
}

.intro.gone {
  opacity: 0;
  transform: translate(-30px, -50%);
  pointer-events: none;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin: 0 0 10px;
  padding: 4px 10px 4px 8px;
  background: rgba(223, 167, 63, 0.1);
  border: 1px solid rgba(223, 167, 63, 0.3);
  border-radius: 999px;
  color: var(--gold-hi);
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  font-weight: 600;
}

.badge-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--gold);
  box-shadow: 0 0 10px var(--gold-hi);
  animation: pulse-dot 2s infinite ease-in-out;
}

@keyframes pulse-dot {
  0%, 100% { opacity: 0.6; transform: scale(0.9); }
  50% { opacity: 1; transform: scale(1.2); }
}

h1 {
  margin: 0 0 12px;
  font-family: var(--serif);
  font-weight: 700;
  font-size: 40px;
  line-height: 1.05;
  background: linear-gradient(135deg, #FFF7EA 0%, #F5C66B 60%, #C9902A 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  filter: drop-shadow(0 2px 8px rgba(0, 0, 0, 0.6));
}

.lede {
  margin: 0 0 22px;
  color: var(--ink-dim);
  font-size: 14px;
  line-height: 1.55;
  font-weight: 400;
}

.howto {
  list-style: none;
  margin: 0 0 24px;
  padding: 0;
  display: grid;
  gap: 8px;
}

.howto li {
  display: grid;
  grid-template-columns: 120px 1fr;
  gap: 12px;
  padding: 6px 10px;
  background: rgba(255, 240, 210, 0.03);
  border-radius: 8px;
  border: 1px solid rgba(223, 167, 63, 0.08);
  line-height: 1.4;
  color: var(--ink);
  font-size: 13px;
  transition: background 0.2s;
}

.howto li:hover {
  background: rgba(255, 240, 210, 0.07);
  border-color: rgba(223, 167, 63, 0.2);
}

.howto .k {
  color: var(--gold-hi);
  font-weight: 600;
  font-size: 12px;
}

.actions {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

.btn {
  appearance: none;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  border: 1px solid rgba(223, 167, 63, 0.35);
  background: rgba(255, 230, 180, 0.07);
  color: var(--ink);
  font: 600 13px/1 var(--sans);
  padding: 12px 20px;
  border-radius: 999px;
  cursor: pointer;
  transition: all 0.25s cubic-bezier(0.16, 1, 0.3, 1);
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.3);
}

.btn:hover {
  background: rgba(255, 230, 180, 0.14);
  border-color: rgba(223, 167, 63, 0.65);
  transform: translateY(-1px);
  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.4), 0 0 12px var(--gold-glow);
}

.btn:active {
  transform: translateY(1px);
}

.btn.primary {
  background: linear-gradient(135deg, #F7D58B 0%, #D9A441 50%, #B0781C 100%);
  border-color: #FFE6AA;
  color: #1a0c02;
  font-weight: 700;
  box-shadow: 0 6px 20px rgba(217, 164, 65, 0.35);
}

.btn.primary:hover {
  background: linear-gradient(135deg, #FFE19C 0%, #E5B24E 50%, #C28723 100%);
  box-shadow: 0 8px 25px rgba(217, 164, 65, 0.5);
}

.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  transform: none !important;
  box-shadow: none !important;
}

.btn-icon {
  flex-shrink: 0;
}

.status-line {
  min-height: 1.2em;
  margin: 14px 0 0;
  color: var(--ink-dim);
  font-size: 13px;
  line-height: 1.4;
}

.status-line.err {
  color: #ff9d85;
  font-weight: 500;
}

/* Bottom HUD */
.hud {
  position: fixed;
  left: 20px;
  bottom: 20px;
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
  pointer-events: none;
  z-index: 10;
  transition: opacity 0.35s ease;
}

.pill {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 14px;
  border-radius: 999px;
  background: rgba(18, 10, 4, 0.85);
  border: 1px solid var(--panel-border);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.02em;
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.4);
}

.dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: #7a6a50;
}

.pill.live .dot {
  background: #77e05e;
  box-shadow: 0 0 10px #77e05e;
}

.pill.warn .dot {
  background: #ffab36;
  box-shadow: 0 0 10px #ffab36;
}

.keys-container {
  background: rgba(18, 10, 4, 0.8);
  border: 1px solid rgba(223, 167, 63, 0.2);
  border-radius: 999px;
  padding: 6px 16px;
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.4);
}

.keys {
  margin: 0;
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
  color: var(--ink-dim);
  font-size: 12px;
}

.key-group {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  white-space: nowrap;
}

kbd {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 20px;
  height: 20px;
  padding: 0 6px;
  border: 1px solid rgba(255, 218, 140, 0.4);
  border-bottom-color: rgba(223, 167, 63, 0.7);
  border-radius: 5px;
  background: linear-gradient(180deg, rgba(50, 30, 15, 0.9) 0%, rgba(25, 14, 6, 0.9) 100%);
  color: var(--gold-hi);
  font: 700 11px/1 var(--sans);
  text-shadow: 0 1px 2px #000;
  box-shadow: 0 2px 4px rgba(0,0,0,0.5), inset 0 1px 0 rgba(255, 230, 170, 0.2);
}

/* Top Action Controls */
.top-controls {
  position: fixed;
  top: 20px;
  right: 20px;
  display: flex;
  gap: 10px;
  z-index: 20;
}

.icon-btn {
  width: 42px;
  height: 42px;
  display: grid;
  place-items: center;
  border-radius: 50%;
  border: 1px solid var(--panel-border);
  background: rgba(18, 10, 4, 0.85);
  color: var(--ink);
  cursor: pointer;
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.4);
  transition: all 0.25s cubic-bezier(0.16, 1, 0.3, 1);
}

.icon-btn:hover {
  border-color: rgba(223, 167, 63, 0.65);
  color: var(--gold-hi);
  transform: scale(1.06);
  box-shadow: 0 10px 30px rgba(0,0,0,0.5), 0 0 15px var(--gold-glow);
}

.sound-btn .off,
.sound-btn[aria-pressed='true'] .on { display: none; }
.sound-btn[aria-pressed='true'] .off { display: block; color: var(--ink-muted); }

/* Settings Drawer */
.settings {
  position: fixed;
  top: 72px;
  right: 20px;
  width: min(320px, calc(100vw - 40px));
  padding: 22px;
  display: grid;
  gap: 16px;
  z-index: 20;
  transform-origin: top right;
  transition: opacity 0.25s ease, transform 0.25s cubic-bezier(0.16, 1, 0.3, 1);
}

.settings[hidden] {
  display: grid !important;
  opacity: 0;
  transform: scale(0.92) translateY(-10px);
  pointer-events: none;
}

.settings-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-bottom: 8px;
  border-bottom: 1px solid rgba(223, 167, 63, 0.2);
}

.settings h2 {
  margin: 0;
  font-family: var(--serif);
  font-size: 24px;
  font-weight: 700;
  color: var(--gold-hi);
}

.close-btn {
  background: none;
  border: none;
  color: var(--ink-dim);
  cursor: pointer;
  padding: 4px;
  border-radius: 50%;
  display: grid;
  place-items: center;
  transition: color 0.2s, background 0.2s;
}

.close-btn:hover {
  color: var(--ink);
  background: rgba(255, 255, 255, 0.1);
}

.settings label {
  display: grid;
  gap: 6px;
  font-size: 12px;
  font-weight: 500;
  color: var(--ink-dim);
}

.settings label.toggle-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  color: var(--ink);
}

.settings select {
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='%23dfa73f'%3E%3Cpath d='M7 10l5 5 5-5z'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 10px center;
  background-color: rgba(255, 230, 180, 0.05);
  color: var(--ink);
  border: 1px solid var(--panel-border);
  border-radius: 8px;
  padding: 9px 30px 9px 12px;
  font: 13px var(--sans);
  cursor: pointer;
  outline: none;
  transition: border-color 0.2s, background-color 0.2s;
}

.settings select:focus,
.settings select:hover {
  border-color: rgba(223, 167, 63, 0.6);
  background-color: rgba(255, 230, 180, 0.09);
}

.settings select option {
  background: #1c0e06;
  color: var(--ink);
}

.settings input[type='checkbox'] {
  width: 18px;
  height: 18px;
  accent-color: var(--gold);
  cursor: pointer;
}

.settings input[type='range'] {
  appearance: none;
  height: 6px;
  border-radius: 3px;
  background: rgba(255, 230, 180, 0.15);
  outline: none;
  cursor: pointer;
}

.settings input[type='range']::-webkit-slider-thumb {
  appearance: none;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: radial-gradient(circle at 30% 30%, #FFE5A3, #D9A441);
  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.6), 0 0 10px rgba(217, 164, 65, 0.4);
  cursor: pointer;
  transition: transform 0.15s;
}

.settings input[type='range']::-webkit-slider-thumb:hover {
  transform: scale(1.15);
}

/* Hand Tracker Camera Preview Box */
#preview-box {
  position: fixed;
  right: 20px;
  bottom: 20px;
  width: min(260px, 40vw);
  border-radius: 14px;
  border: 1px solid var(--panel-border);
  background: rgba(14, 7, 3, 0.9);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  box-shadow: 0 16px 40px rgba(0, 0, 0, 0.6);
  overflow: hidden;
  z-index: 10;
  transition: opacity 0.3s ease;
}

.preview-header {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 6px 10px;
  background: rgba(0, 0, 0, 0.4);
  border-bottom: 1px solid rgba(223, 167, 63, 0.15);
  font-size: 10px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--ink-dim);
  font-weight: 600;
}

.preview-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: #77e05e;
  box-shadow: 0 0 6px #77e05e;
}

#preview {
  display: block;
  width: 100%;
  aspect-ratio: 16 / 9;
  height: auto;
  background: #000;
}

.popout-btn {
  position: absolute;
  top: 32px;
  right: 8px;
  width: 32px;
  height: 32px;
  display: grid;
  place-items: center;
  border-radius: 8px;
  border: 1px solid var(--panel-border);
  background: rgba(18, 10, 4, 0.85);
  color: var(--ink);
  cursor: pointer;
  opacity: 0;
  transition: opacity 0.2s, border-color 0.2s, transform 0.2s;
}

#preview-box:hover .popout-btn,
.popout-btn:focus-visible { opacity: 1; }
.popout-btn:hover {
  border-color: rgba(223, 167, 63, 0.6);
  color: var(--gold-hi);
  transform: scale(1.05);
}

.btn.small {
  padding: 8px 14px;
  font-size: 12px;
}

/* Toast Notification */
.toast {
  position: fixed;
  top: 24px;
  left: 50%;
  transform: translate(-50%, -12px);
  padding: 10px 22px;
  border-radius: 999px;
  background: linear-gradient(135deg, rgba(30, 16, 8, 0.92) 0%, rgba(18, 9, 3, 0.92) 100%);
  border: 1px solid rgba(255, 218, 140, 0.4);
  box-shadow: 0 12px 36px rgba(0, 0, 0, 0.6), 0 0 20px rgba(223, 167, 63, 0.25);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  font-family: var(--serif);
  font-style: italic;
  font-size: 20px;
  font-weight: 600;
  color: var(--gold-hi);
  letter-spacing: 0.03em;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.35s cubic-bezier(0.16, 1, 0.3, 1), transform 0.35s cubic-bezier(0.16, 1, 0.3, 1);
  white-space: nowrap;
  z-index: 100;
}

.toast.show {
  opacity: 1;
  transform: translate(-50%, 0);
}

body.ui-hidden .toast { opacity: 0; }

.error {
  position: fixed;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);
  padding: 24px 28px;
  max-width: min(480px, calc(100vw - 40px));
  line-height: 1.5;
  z-index: 200;
}

body.ui-hidden .hud,
body.ui-hidden .top-controls,
body.ui-hidden #preview-box,
body.ui-hidden .settings {
  opacity: 0 !important;
  pointer-events: none !important;
}

@media (max-width: 768px) {
  .intro {
    left: 16px;
    right: 16px;
    top: auto;
    bottom: 20px;
    transform: none;
    width: auto;
    max-height: 70vh;
    padding: 20px;
  }
  .intro.gone { transform: translateY(30px); }
  h1 { font-size: 30px; }
  .howto li { grid-template-columns: 100px 1fr; }
  .keys-container { display: none; }
}