:root {
  color-scheme: dark;
  --bg: #0b0714;
  --surface: #171126;
  --text: #f8f5ff;
  --muted: #b9b0c9;
  --pink: #ff4fd8;
  --purple: #8a5cff;
  --blue: #28d7ff;
  --safe-top: env(safe-area-inset-top, 0px);
  --safe-bottom: env(safe-area-inset-bottom, 0px);
}

* { box-sizing: border-box; -webkit-tap-highlight-color: transparent; }
[hidden] { display: none !important; }
html, body { margin: 0; width: 100%; min-height: 100%; background: var(--bg); overscroll-behavior: none; }
body {
  min-height: 100dvh;
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Display", "Segoe UI", sans-serif;
  overflow: hidden;
  -webkit-font-smoothing: antialiased;
  user-select: none;
}
button { font: inherit; }

.app-shell {
  position: relative;
  width: 100%;
  height: 100dvh;
  overflow: hidden;
  isolation: isolate;
  background: linear-gradient(145deg, #0b0714 0%, #17102a 50%, #09141b 100%);
}

.ambient {
  position: absolute;
  border-radius: 50%;
  filter: blur(14px);
  opacity: .8;
  pointer-events: none;
  z-index: -1;
}
.ambient-a { width: 58vmax; height: 58vmax; left: -30vmax; top: -20vmax; background: radial-gradient(circle, rgba(255,79,216,.12), transparent 68%); animation: drift-a 8s ease-in-out infinite alternate; }
.ambient-b { width: 62vmax; height: 62vmax; right: -34vmax; top: 20vh; background: radial-gradient(circle, rgba(40,215,255,.10), transparent 68%); animation: drift-b 9s ease-in-out infinite alternate; }
.ambient-c { width: 54vmax; height: 54vmax; left: 10vw; bottom: -38vmax; background: radial-gradient(circle, rgba(138,92,255,.10), transparent 68%); }
@keyframes drift-a { to { transform: translate(7vw, 3vh); } }
@keyframes drift-b { to { transform: translate(-8vw, -3vh); } }

.screen-stack, .screen { width: 100%; height: 100%; }
.screen {
  position: absolute;
  inset: 0;
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transform: translateX(4%);
  transition: opacity 280ms ease, transform 380ms cubic-bezier(.22,.8,.24,1), visibility 0s linear 380ms;
}
.screen.active {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
  transform: translateX(0);
  transition-delay: 0s;
}

.center-content {
  height: 100%;
  padding: calc(var(--safe-top) + 34px) 26px calc(var(--safe-bottom) + 30px);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
}

h1, h2 { margin: 0; letter-spacing: -.035em; font-weight: 900; }
h1 { font-size: clamp(34px, 9vw, 48px); line-height: 1.08; }
h2 { font-size: clamp(31px, 8vw, 42px); line-height: 1.1; }
.subtitle { margin: 12px 0 0; color: var(--muted); font-size: 17px; line-height: 1.45; }
.subtitle.wide { max-width: 420px; }
.microcopy { margin: 10px 0 0; min-height: 18px; color: rgba(185,176,201,.72); font-size: 12px; line-height: 1.4; text-align: center; }

.primary-button, .secondary-button {
  border: 0;
  border-radius: 20px;
  min-height: 58px;
  padding: 0 22px;
  font-weight: 800;
  font-size: 17px;
  cursor: pointer;
}
.primary-button {
  color: #160a17;
  background: var(--pink);
  box-shadow: 0 12px 34px rgba(255,79,216,.18);
}
.primary-button:active, .secondary-button:active { transform: scale(.985); }
.secondary-button {
  color: var(--text);
  background: rgba(255,255,255,.09);
  border: 1px solid rgba(255,255,255,.10);
}
.ghost-button {
  border: 0;
  color: var(--text);
  background: transparent;
  padding: 12px 4px;
  font-size: 16px;
}

.start-content { padding-top: calc(var(--safe-top) + 115px); }
.start-content .primary-button { width: min(100%, 520px); margin-top: 40px; }

.music-road {
  position: absolute;
  top: calc(var(--safe-top) + 32px);
  left: 0;
  width: 100%;
  height: 140px;
  overflow: hidden;
  opacity: .98;
  pointer-events: none;
}
.music-road::before, .music-road::after {
  content: "";
  position: absolute;
  left: -8%;
  width: 116%;
  border-radius: 50%;
  border-top: 20px solid rgba(138,92,255,.055);
  transform: rotate(-2deg);
}
.music-road::before { top: 52px; height: 50px; }
.music-road::after { top: 67px; height: 24px; border-top-width: 7px; border-color: rgba(255,79,216,.035); }
.music-road-track {
  position: absolute;
  left: 0;
  width: 200%;
  display: grid;
  grid-template-columns: repeat(16, 1fr);
  align-items: center;
  will-change: transform;
  animation: notes-flow 9s linear infinite;
}
.music-road-track-a { top: 24px; }
.music-road-track-b { top: 72px; animation-duration: 11s; }
.note { display: block; text-align: center; font-weight: 900; line-height: 1; opacity: .17; font-size: 28px; transform: rotate(-8deg); }
.music-road-track-b .note { font-size: 20px; opacity: .14; transform: rotate(7deg); }
.note.pink { color: var(--pink); }
.note.purple { color: var(--purple); }
.note.blue { color: var(--blue); }
@keyframes notes-flow { from { transform: translateX(-50%); } to { transform: translateX(0); } }

.equalizer { margin-top: 40px; height: 56px; display: flex; align-items: flex-end; gap: 8px; }
.equalizer i { display: block; width: 7px; min-height: 10px; border-radius: 999px; background: var(--pink); animation: eq 560ms ease-in-out infinite alternate; transform-origin: bottom; }
.equalizer i:nth-child(even) { background: var(--blue); animation-duration: 720ms; }
.equalizer i:nth-child(3n) { animation-duration: 460ms; }
.equalizer i:nth-child(1) { height: 18px; }.equalizer i:nth-child(2) { height: 46px; }.equalizer i:nth-child(3) { height: 26px; }.equalizer i:nth-child(4) { height: 52px; }.equalizer i:nth-child(5) { height: 32px; }.equalizer i:nth-child(6) { height: 42px; }.equalizer i:nth-child(7) { height: 24px; }
@keyframes eq { to { transform: scaleY(.42); } }

.app-header {
  position: relative;
  z-index: 5;
  width: 100%;
  padding: calc(var(--safe-top) + 12px) 22px 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.app-header strong { color: var(--pink); font-size: 20px; font-weight: 900; }
.app-header.left-only { justify-content: flex-start; }

.scan-content { padding: 22px 22px calc(var(--safe-bottom) + 24px); text-align: center; }
.camera-card {
  position: relative;
  margin-top: 28px;
  width: 100%;
  height: min(310px, 38vh);
  min-height: 250px;
  overflow: hidden;
  border-radius: 34px;
  background: #000;
  border: 1px solid rgba(255,255,255,.12);
}
#cameraVideo { width: 100%; height: 100%; object-fit: cover; display: block; }
.camera-placeholder { position: absolute; inset: 0; display: grid; place-items: center; color: var(--muted); background: #070709; }
.scan-frame { position: absolute; inset: 0; pointer-events: none; }
.scan-frame > span { position: absolute; width: 56px; height: 56px; border-color: var(--pink); border-style: solid; }
.scan-frame > span:nth-child(1) { left: 16%; top: 16%; border-width: 4px 0 0 4px; border-radius: 16px 0 0 0; }
.scan-frame > span:nth-child(2) { right: 16%; top: 16%; border-width: 4px 4px 0 0; border-radius: 0 16px 0 0; }
.scan-frame > span:nth-child(3) { left: 16%; bottom: 16%; border-width: 0 0 4px 4px; border-radius: 0 0 0 16px; }
.scan-frame > span:nth-child(4) { right: 16%; bottom: 16%; border-width: 0 4px 4px 0; border-radius: 0 0 16px 0; }
.scan-line { position: absolute; left: 16%; right: 16%; top: 20%; height: 3px; background: linear-gradient(90deg, transparent, var(--blue), var(--pink), transparent); animation: scanline 1.5s ease-in-out infinite alternate; }
@keyframes scanline { to { top: 80%; } }
.notice { margin: 20px 0 0; padding: 14px; border-radius: 16px; color: var(--pink); background: rgba(23,17,38,.78); }
#retryCameraButton { margin-top: 16px; }

.flip-content { padding-top: calc(var(--safe-top) + 80px); }
.flip-stage { perspective: 850px; display: grid; place-items: center; margin-bottom: 30px; }
.phone-3d { position: relative; width: 150px; height: 270px; transform-style: preserve-3d; animation: flip-phone 3.4s ease-in-out infinite; }
.phone-face { position: absolute; inset: 0; border-radius: 30px; border: 2px solid rgba(255,255,255,.35); backface-visibility: hidden; overflow: hidden; }
.phone-front { background: #0b0914; padding: 13px; }
.phone-back { background: linear-gradient(145deg,#1d122a,#2b1434); transform: rotateX(180deg); }
.speaker { position: absolute; z-index: 2; width: 48px; height: 7px; left: 50%; top: 12px; transform: translateX(-50%); background: rgba(0,0,0,.68); border-radius: 999px; }
.screen-glow { width: 100%; height: 100%; border-radius: 24px; display: grid; place-items: center; background: linear-gradient(145deg,rgba(40,215,255,.55),rgba(138,92,255,.42),rgba(255,79,216,.55)); font-size: 18px; font-weight: 900; }
.camera-cluster { position: absolute; left: 18px; top: 20px; width: 58px; height: 58px; border-radius: 20px; background: rgba(0,0,0,.35); }
.camera-cluster i { position: absolute; width: 15px; height: 15px; border-radius: 50%; background: #0e0b18; border: 1px solid rgba(255,255,255,.18); }
.camera-cluster i:nth-child(1) { left: 8px; top: 8px; }.camera-cluster i:nth-child(2) { right: 8px; top: 8px; }.camera-cluster i:nth-child(3) { left: 22px; bottom: 8px; }
.back-mark { position: absolute; left: 50%; top: 50%; transform: translate(-50%,-50%); width: 72px; height: 72px; display: grid; place-items: center; border-radius: 50%; color: #14091b; background: var(--pink); font-size: 32px; font-weight: 900; }
@keyframes flip-phone { 0%, 12% { transform: rotateX(0deg); } 45%, 55% { transform: rotateX(180deg); } 88%, 100% { transform: rotateX(360deg); } }
.face-down-label { margin-top: 18px; color: var(--pink); font-size: 15px; font-weight: 800; }
.table-line { width: 220px; height: 8px; margin-top: 8px; border-radius: 999px; background: rgba(255,255,255,.18); }
#manualContinueButton { width: min(100%, 480px); margin-top: 22px; }

.player-layout { height: 100%; padding: calc(var(--safe-top) + 40px) 22px calc(var(--safe-bottom) + 16px); display: grid; grid-template-rows: auto 1fr auto; text-align: center; }
.player-heading .subtitle { margin-top: 8px; }
.spotify-stage { display: flex; flex-direction: column; align-items: center; justify-content: center; min-height: 0; }
.spotify-square {
  position: relative;
  width: min(88vw, 410px);
  aspect-ratio: 1 / 1;
  border-radius: 22px;
  overflow: hidden;
  background: transparent;
  line-height: 0;
}
.spotify-square iframe {
  position: absolute;
  left: 0;
  top: 0;
  width: 100% !important;
  height: calc(100% + 8px) !important;
  display: block;
  border: 0 !important;
  outline: 0 !important;
  margin: 0 !important;
  padding: 0 !important;
  border-radius: 22px !important;
  vertical-align: top;
}
.play-fallback { margin-top: 14px; min-height: 50px; }
.player-footer { width: 100%; }
.player-footer .primary-button { width: 100%; margin-top: 12px; }

@media (max-height: 700px) {
  .music-road { top: calc(var(--safe-top) + 18px); height: 112px; }
  .start-content { padding-top: calc(var(--safe-top) + 80px); }
  .equalizer { margin-top: 26px; }
  .start-content .primary-button { margin-top: 28px; }
  .phone-3d { width: 126px; height: 226px; }
  .flip-stage { margin-bottom: 18px; }
  .spotify-square { width: min(64vh, 84vw); }
}

@media (min-width: 760px) {
  .scan-content { max-width: 620px; margin: 0 auto; }
  .camera-card { height: 360px; }
  .spotify-square { width: min(58vw, 460px); }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: .001ms !important; animation-iteration-count: 1 !important; transition-duration: .001ms !important; }
}

.face-down-status { margin-top: 18px; min-height: 22px; color: rgba(185,176,201,.78); font-size: 13px; font-weight: 700; }
.arm-audio { width: min(100%, 420px); margin-top: 16px; }
.arm-audio.ready { background: rgba(255,255,255,.10); color: var(--text); box-shadow: none; }

/* v5: Play-first reveal flow */
.ready-content {
  padding-top: calc(var(--safe-top) + 54px);
  justify-content: center;
}
.ready-kicker {
  margin-bottom: 14px;
  color: var(--pink);
  font-size: 12px;
  font-weight: 900;
  letter-spacing: .22em;
  opacity: .82;
}
.ready-content .subtitle {
  max-width: 430px;
}
.ready-status {
  min-height: 22px;
  margin: 18px 0 0;
  color: rgba(185,176,201,.82);
  font-size: 13px;
  line-height: 1.45;
  font-weight: 700;
}
.mega-play-button {
  position: relative;
  width: min(48vw, 192px);
  aspect-ratio: 1 / 1;
  margin-top: 40px;
  border: 0;
  border-radius: 50%;
  display: grid;
  place-items: center;
  align-content: center;
  gap: 12px;
  color: var(--text);
  background:
    radial-gradient(circle at 50% 42%, rgba(255,79,216,.13), transparent 48%),
    linear-gradient(145deg, rgba(26,17,42,.94), rgba(10,8,19,.98));
  box-shadow:
    0 26px 70px rgba(0,0,0,.42),
    0 0 44px rgba(255,79,216,.13),
    inset 0 1px 0 rgba(255,255,255,.08);
  font: inherit;
  font-size: 13px;
  font-weight: 900;
  letter-spacing: .18em;
  cursor: pointer;
  transform: translateZ(0);
  transition: transform 180ms ease, filter 220ms ease, opacity 220ms ease, box-shadow 220ms ease;
  isolation: isolate;
}
.mega-play-button::before {
  content: "";
  position: absolute;
  inset: -4px;
  border-radius: 50%;
  padding: 3px;
  background: conic-gradient(from 210deg, var(--blue), var(--purple), var(--pink), var(--purple), var(--blue));
  -webkit-mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
  -webkit-mask-composite: xor;
  mask-composite: exclude;
  opacity: .92;
  pointer-events: none;
}
.mega-play-button::after {
  content: "";
  position: absolute;
  inset: -18px;
  border-radius: 50%;
  border: 1px solid rgba(255,79,216,.16);
  box-shadow: 0 0 34px rgba(138,92,255,.13);
  animation: premium-play-pulse 2.2s ease-out infinite;
  pointer-events: none;
  z-index: -1;
}
.mega-play-button:disabled {
  opacity: .48;
  filter: saturate(.55);
  cursor: default;
}
.mega-play-button.ready:not(:disabled) {
  box-shadow:
    0 28px 76px rgba(0,0,0,.48),
    0 0 56px rgba(255,79,216,.18),
    0 0 34px rgba(40,215,255,.07),
    inset 0 1px 0 rgba(255,255,255,.10);
}
.mega-play-button.ready:not(:disabled):active {
  transform: scale(.965);
}
.mega-play-button.starting {
  animation: play-launch 480ms cubic-bezier(.2,.9,.2,1) both;
}
.mega-play-icon {
  width: 0;
  height: 0;
  margin-left: 9px;
  border-top: 27px solid transparent;
  border-bottom: 27px solid transparent;
  border-left: 43px solid var(--pink);
  filter:
    drop-shadow(0 0 10px rgba(255,79,216,.45))
    drop-shadow(0 0 20px rgba(138,92,255,.18));
}
#readyPlayLabel {
  margin-top: 2px;
  color: rgba(248,245,255,.76);
  text-shadow: 0 1px 12px rgba(0,0,0,.7);
}
@keyframes premium-play-pulse {
  0% { transform: scale(.94); opacity: .48; }
  72%,100% { transform: scale(1.18); opacity: 0; }
}
@keyframes play-launch {
  0% { transform: scale(1); }
  48% { transform: scale(.93); }
  100% { transform: scale(1.035); }
}

.countdown-overlay {
  position: absolute;
  z-index: 80;
  inset: 0;
  overflow: hidden;
  display: grid;
  place-items: center;
  background:
    radial-gradient(circle at center, rgba(255,79,216,.18), rgba(11,7,20,.90) 56%, rgba(11,7,20,.97));
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  pointer-events: none;
}
.countdown-overlay[hidden] { display: none !important; }
.countdown-number {
  position: relative;
  z-index: 3;
  width: 100%;
  text-align: center;
  color: var(--pink);
  font-size: min(70vw, 540px);
  line-height: .8;
  font-weight: 1000;
  font-style: italic;
  letter-spacing: -.08em;
  transform: scale(.001) rotate(-9deg);
  opacity: 0;
  text-shadow:
    0 7px 0 rgba(138,92,255,.55),
    0 14px 45px rgba(255,79,216,.40),
    8px 0 0 rgba(40,215,255,.12);
  will-change: transform, opacity;
}
.countdown-number.pow {
  animation: countdown-pow 820ms cubic-bezier(.14,.86,.22,1) both;
}
.countdown-shockwave {
  position: absolute;
  z-index: 2;
  width: min(74vw, 560px);
  aspect-ratio: 1;
  border-radius: 50%;
  border: 4px solid rgba(40,215,255,.12);
  box-shadow:
    0 0 0 22px rgba(138,92,255,.05),
    0 0 0 48px rgba(255,79,216,.03);
  animation: shockwave 1s ease-out infinite;
}
.countdown-instruction {
  position: absolute;
  z-index: 4;
  left: 24px;
  right: 24px;
  bottom: calc(var(--safe-bottom) + 62px);
  color: var(--text);
  font-size: clamp(18px, 5.3vw, 27px);
  font-weight: 1000;
  letter-spacing: .12em;
  text-align: center;
  text-shadow: 0 4px 25px rgba(0,0,0,.6);
  animation: instruction-pulse .55s ease-in-out infinite alternate;
}
@keyframes countdown-pow {
  0% { transform: scale(.001) rotate(-14deg); opacity: 0; filter: blur(7px); }
  20% { opacity: 1; filter: blur(0); }
  48% { transform: scale(1.10) rotate(2deg); opacity: 1; }
  66% { transform: scale(.92) rotate(-1deg); opacity: 1; }
  100% { transform: scale(.03) rotate(8deg); opacity: 0; filter: blur(4px); }
}
@keyframes shockwave {
  0% { transform: scale(.35); opacity: .8; }
  100% { transform: scale(1.22); opacity: 0; }
}
@keyframes instruction-pulse { to { transform: scale(1.045); opacity: .76; } }

@media (max-height: 700px) {
  .mega-play-button { width: min(37vh, 44vw); margin-top: 24px; }
  .ready-content { padding-top: calc(var(--safe-top) + 28px); }
  .countdown-instruction { bottom: calc(var(--safe-bottom) + 34px); }
}