/* Volt Party controller — High Voltage neon. No external assets. */
:root {
  --bg: #0d081a;
  --cyan: #00e5ff;
  --magenta: #ff33bf;
  --accent: var(--cyan);
  --ink: #e8e2ff;
}

* { box-sizing: border-box; margin: 0; padding: 0; -webkit-tap-highlight-color: transparent; }

html, body { height: 100%; overscroll-behavior: none; }

body {
  background: radial-gradient(120% 90% at 50% 0%, #1a0f33 0%, var(--bg) 60%);
  color: var(--ink);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  user-select: none;
  -webkit-user-select: none;
  touch-action: manipulation;
  padding: env(safe-area-inset-top) env(safe-area-inset-right)
           env(safe-area-inset-bottom) env(safe-area-inset-left);
}

section {
  min-height: 100dvh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 1.4rem;
  padding: 1.2rem;
}
section[hidden] { display: none; }

/* ---------- join ---------- */
.logo {
  font-size: clamp(2.6rem, 14vw, 4.2rem);
  color: var(--cyan);
  text-shadow: 0 0 12px var(--cyan), 0 0 42px rgba(0, 229, 255, 0.5);
}
.logo span {
  color: var(--magenta);
  text-shadow: 0 0 12px var(--magenta), 0 0 42px rgba(255, 51, 191, 0.5);
}

#nameInput {
  width: min(80vw, 20rem);
  font: inherit;
  font-size: 1.8rem;
  text-align: center;
  text-transform: uppercase;
  color: var(--ink);
  background: rgba(255, 255, 255, 0.05);
  border: 2px solid var(--cyan);
  border-radius: 0.8rem;
  padding: 0.9rem;
  outline: none;
  box-shadow: 0 0 10px rgba(0, 229, 255, 0.35) inset;
}
#nameInput:focus { border-color: var(--magenta); }

.btn {
  font: inherit;
  letter-spacing: inherit;
  text-transform: inherit;
  color: var(--bg);
  background: var(--accent);
  border: none;
  border-radius: 0.9rem;
  cursor: pointer;
  box-shadow: 0 0 16px var(--accent);
}
.btn.big {
  width: min(80vw, 20rem);
  min-height: 4.2rem;
  font-size: 1.5rem;
}
.btn:active { filter: brightness(1.3); transform: scale(0.97); }

.msg { color: var(--magenta); font-size: 1.05rem; text-align: center; max-width: 85vw; }

/* ---------- hud ---------- */
#hud {
  position: fixed;
  top: env(safe-area-inset-top);
  left: 0; right: 0;
  display: flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.7rem 1rem;
  font-size: 1rem;
}
#hud .spacer { flex: 1; }
.chip {
  width: 1.1rem; height: 1.1rem;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 10px var(--accent);
}
.dot { font-size: 0.85rem; color: #554b77; transition: color 0.2s; }
.dot.on { color: #46ff9e; text-shadow: 0 0 8px #46ff9e; }
.dot.off { color: #ff4060; text-shadow: 0 0 8px #ff4060; }

/* ---------- stage ---------- */
#stage {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 1.6rem;
  width: 100%;
}

#prompt {
  font-size: clamp(1.8rem, 9vw, 3.2rem);
  text-align: center;
  color: var(--accent);
  text-shadow: 0 0 14px var(--accent);
  max-width: 92vw;
}
#prompt.pulse { animation: pulse 0.55s ease-in-out infinite alternate; }
@keyframes pulse {
  from { transform: scale(1); }
  to   { transform: scale(1.1); text-shadow: 0 0 26px var(--accent), 0 0 60px var(--accent); }
}

/* big TAP button: lobby / hold / results */
#btnMain {
  width: min(62vw, 17rem);
  aspect-ratio: 1;
  border-radius: 50%;
  font: inherit;
  font-size: 2.2rem;
  letter-spacing: inherit;
  color: var(--ink);
  background: radial-gradient(circle at 50% 35%, rgba(255, 255, 255, 0.14), transparent 65%),
              var(--bg);
  border: 4px solid var(--accent);
  box-shadow: 0 0 22px var(--accent), 0 0 8px var(--accent) inset;
  cursor: pointer;
}
#btnMain:active {
  background: var(--accent);
  color: var(--bg);
  transform: scale(0.95);
}

/* shake meter */
#shakeMeter {
  width: min(84vw, 22rem);
  height: 2rem;
  border: 2px solid var(--cyan);
  border-radius: 1rem;
  overflow: hidden;
  box-shadow: 0 0 12px rgba(0, 229, 255, 0.4);
}
#shakeFill {
  height: 100%;
  width: 0%;
  background: linear-gradient(90deg, var(--cyan), var(--magenta));
  transition: width 60ms linear;
}

/* pancake */
#pan { font-size: 7rem; filter: drop-shadow(0 0 14px var(--magenta)); }
#pan.flash { animation: flip 0.35s ease-out; }
@keyframes flip {
  0%   { transform: rotate(0) scale(1); filter: brightness(3) drop-shadow(0 0 30px var(--cyan)); }
  100% { transform: rotate(360deg) scale(1); }
}

/* pose */
#poseWrap { display: flex; flex-direction: column; align-items: center; gap: 1rem; }
#poseView { position: relative; width: min(80vw, 20rem); }
#cam, #skel {
  width: 100%;
  border-radius: 1rem;
  transform: scaleX(-1); /* selfie mirror; sent keypoints stay unmirrored */
}
#cam { border: 2px solid var(--accent); box-shadow: 0 0 16px var(--accent); display: block; }
#skel { position: absolute; inset: 0; height: 100%; }

/* buzz fallback: full-screen flash when vibrate is unsupported */
body.buzzflash::after {
  content: "";
  position: fixed;
  inset: 0;
  background: var(--accent);
  opacity: 0.55;
  pointer-events: none;
  animation: fade 0.18s ease-out forwards;
}
@keyframes fade { to { opacity: 0; } }

[hidden] { display: none !important; }

/* Decision prompts (junction / power-cell purchase) */
#choiceWrap {
  display: flex;
  flex-direction: column;
  gap: 14px;
  width: 100%;
  padding: 0 8vw;
  box-sizing: border-box;
}
#choiceWrap[hidden] { display: none; }
.choiceBtn {
  min-height: 84px;
  font-size: 1.5rem;
  font-weight: 800;
  letter-spacing: 0.06em;
  color: #fff;
  background: rgba(0, 229, 255, 0.10);
  border: 2px solid var(--accent, #00e5ff);
  border-radius: 14px;
  box-shadow: 0 0 18px rgba(0, 229, 255, 0.25);
  touch-action: manipulation;
}
.choiceBtn:active { background: rgba(0, 229, 255, 0.30); transform: scale(0.98); }

/* One-time cert-trust helper link on the join screen */
.trust {
  display: block;
  margin-top: 18px;
  font-size: 0.8rem;
  color: var(--accent, #00e5ff);
  opacity: 0.8;
  text-decoration: none;
  text-align: center;
}
.trust:active { opacity: 1; }

/* Tap-to-pick name (no text field -> no iOS shake-to-undo) */
.pickLabel { font-size: 0.85rem; letter-spacing: 0.15em; color: #8a7ea8; margin: 6px 0 0; }
.nameChip {
  font-size: 2.4rem; font-weight: 800; letter-spacing: 0.06em;
  color: var(--accent, #00e5ff);
  background: rgba(0,229,255,0.10);
  border: 2px solid var(--accent, #00e5ff);
  border-radius: 16px; padding: 10px 28px; margin: 4px 0 2px;
  box-shadow: 0 0 20px rgba(0,229,255,0.25);
  touch-action: manipulation;
}
.nameChip:active { transform: scale(0.97); }
.btn.ghost {
  background: transparent; border: 1px solid rgba(255,255,255,0.25);
  color: #cbd5e5; font-size: 0.95rem; padding: 8px 18px;
}

/* Party-code entry (relay, opened without scanning the TV's QR). */
#codeForm { display: flex; flex-direction: column; gap: 18px; align-items: center; }
.codeInput {
  width: 9ch; text-align: center; font: 700 48px/1 inherit; letter-spacing: .25em;
  text-transform: uppercase; padding: 12px 8px; border-radius: 14px;
  border: 2px solid var(--accent, #00e5ff); background: #0b0718; color: #fff;
}