* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  background: linear-gradient(135deg, #0f0c29, #302b63, #24243e);
  color: #fff;
  min-height: 100vh;
  display: flex;
  justify-content: center;
  align-items: flex-start;
  padding: 20px;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

.page {
  display: none;
  width: 100%;
  max-width: 600px;
  margin: 0 auto;
  padding: 30px 20px;
  animation: fadeIn 0.3s ease;
}

.page.active {
  display: block;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: translateY(0); }
}

/* Title */
.title {
  text-align: center;
  font-size: 2.5rem;
  margin-bottom: 5px;
}

.subtitle {
  text-align: center;
  font-size: 1.1rem;
  color: #aaa;
  margin-bottom: 30px;
}

/* Team Setup */
.team-setup {
  background: rgba(255, 255, 255, 0.08);
  border-radius: 16px;
  padding: 20px;
  margin-bottom: 20px;
}

.team-setup h2 {
  font-size: 1.2rem;
  margin-bottom: 6px;
  text-align: center;
}

.team-setup-note {
  text-align: center;
  font-size: 0.92rem;
  color: #bfbfd8;
  margin-bottom: 16px;
}

.team-names {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}

.team-input-row {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: center;
  gap: 10px;
  width: 100%;
  min-width: 0;
  padding: 10px 12px;
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.16);
  border-radius: 12px;
  transition: border-color 0.2s, background 0.2s;
}

.team-input-row:last-child:nth-child(odd) {
  grid-column: 1 / -1;
  width: calc((100% - 12px) / 2);
  justify-self: center;
}

.team-input-row.current {
  border-color: rgba(168, 85, 247, 0.9);
  background: rgba(168, 85, 247, 0.16);
}

.team-slot-label {
  flex: 0 0 auto;
  font-size: 0.88rem;
  color: #cfc6ff;
  font-weight: 600;
}

.team-name-input {
  width: 100%;
  min-width: 0;
  background: transparent;
  border: none;
  color: #fff;
  padding: 4px 0;
  font-size: 0.95rem;
  outline: none;
  transition: opacity 0.2s;
}

.team-name-input:focus {
  opacity: 0.85;
}

.team-name-input:disabled {
  cursor: default;
  opacity: 1;
}

.team-name-input::placeholder {
  color: rgba(255, 255, 255, 0.4);
}

.team-score-chip {
  min-width: 52px;
  padding: 6px 10px;
  border-radius: 999px;
  background: rgba(108, 92, 231, 0.28);
  color: #efe7ff;
  font-size: 0.9rem;
  font-weight: 700;
  text-align: center;
  font-variant-numeric: tabular-nums;
}

/* Song info */
.song-info {
  text-align: center;
  margin-bottom: 20px;
  font-size: 1rem;
  color: #ccc;
}

/* Buttons */
.btn {
  display: block;
  width: 100%;
  padding: 14px;
  border: none;
  border-radius: 12px;
  font-size: 1.1rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s;
  margin-bottom: 10px;
}

.btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.3);
}

.btn:active {
  transform: translateY(0);
}

.start-actions {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.btn-start {
  background: linear-gradient(135deg, #6c5ce7, #a855f7);
  color: #fff;
}

.btn-reset {
  background: rgba(255, 255, 255, 0.1);
  color: #ccc;
  font-size: 0.95rem;
}

.btn-reset:hover {
  background: rgba(255, 255, 255, 0.15);
}

/* Game Page */
.game-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 25px;
}

.timer {
  font-size: 2.5rem;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
  color: #fff;
}

.timer.warning {
  color: #fdcb6e;
}

.timer.danger {
  color: #e17055;
  animation: pulse 0.5s ease infinite alternate;
}

@keyframes pulse {
  from { opacity: 1; }
  to { opacity: 0.5; }
}

.song-counter {
  font-size: 1rem;
  color: #aaa;
}

/* YouTube player */
#player-container {
  width: 100%;
  max-width: 640px;
  aspect-ratio: 16 / 9;
  margin: 0 auto 16px;
  border-radius: 14px;
  overflow: hidden;
  background: rgba(0, 0, 0, 0.5);
  border: 1px solid rgba(255, 255, 255, 0.18);
  box-shadow: 0 8px 25px rgba(0, 0, 0, 0.35);
}

#youtube-player {
  width: 100%;
  height: 100%;
}

#youtube-player iframe {
  width: 100% !important;
  height: 100% !important;
  border: 0;
}

/* Music visualizer */
.host-song-panel {
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.16);
  border-radius: 14px;
  padding: 14px 16px;
  margin-bottom: 16px;
}

.host-label {
  font-size: 0.78rem;
  color: #c9c9c9;
  margin-bottom: 6px;
  letter-spacing: 0.04em;
}

.host-song-title {
  font-size: 1.18rem;
  font-weight: 700;
  line-height: 1.35;
}

.host-song-artist {
  margin-top: 4px;
  font-size: 0.95rem;
  color: #c8b6ff;
}

.now-playing {
  text-align: center;
  margin: 18px 0 24px;
}

.music-visual {
  display: flex;
  justify-content: center;
  align-items: flex-end;
  gap: 6px;
  height: 60px;
  margin-bottom: 15px;
}

.music-visual span {
  width: 8px;
  background: #6c5ce7;
  border-radius: 4px;
  animation: none;
  height: 10px;
}

.music-visual.playing span {
  animation: musicBar 0.6s ease-in-out infinite alternate;
}

.music-visual.playing span:nth-child(1) { animation-delay: 0s; }
.music-visual.playing span:nth-child(2) { animation-delay: 0.15s; }
.music-visual.playing span:nth-child(3) { animation-delay: 0.3s; }
.music-visual.playing span:nth-child(4) { animation-delay: 0.45s; }
.music-visual.playing span:nth-child(5) { animation-delay: 0.1s; }

@keyframes musicBar {
  from { height: 10px; }
  to { height: 55px; }
}

#playing-status {
  font-size: 1.1rem;
  color: #ccc;
}

/* Current turn indicator */
.current-turn {
  text-align: center;
  background: linear-gradient(135deg, rgba(108, 92, 231, 0.3), rgba(168, 85, 247, 0.2));
  border: 2px solid #6c5ce7;
  border-radius: 16px;
  padding: 16px 24px;
  margin-bottom: 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  animation: fadeIn 0.3s ease;
}

.turn-label {
  font-size: 1rem;
  color: #aaa;
}

.turn-team-wrap {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
  justify-content: center;
}

.turn-team {
  font-size: 1.5rem;
  font-weight: 700;
  color: #a855f7;
}

.turn-score {
  padding: 6px 12px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.12);
  color: #fff;
  font-size: 0.95rem;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
}

/* Game controls */
.game-controls {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 10px;
  margin-bottom: 20px;
}

.btn-replay {
  background: linear-gradient(135deg, #a29bfe, #6c5ce7);
  color: #fff;
  font-size: 0.95rem;
  padding: 12px 8px;
}

.btn-next {
  background: linear-gradient(135deg, #00b894, #00cec9);
  color: #fff;
  font-size: 0.95rem;
  padding: 12px 8px;
}

.btn-pass {
  background: linear-gradient(135deg, #fdcb6e, #e17055);
  color: #fff;
  font-size: 0.95rem;
  padding: 12px 8px;
}

.btn-pass:disabled {
  background: rgba(255, 255, 255, 0.1);
  color: #666;
  cursor: not-allowed;
  transform: none;
  box-shadow: none;
}

/* Scoreboard */
.scoreboard {
  background: rgba(255, 255, 255, 0.06);
  border-radius: 16px;
  padding: 18px;
  margin-bottom: 20px;
}

.scoreboard h3 {
  text-align: center;
  font-size: 1.1rem;
  margin-bottom: 12px;
}

.scoreboard-teams {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
}

.score-card {
  background: rgba(255, 255, 255, 0.08);
  border-radius: 10px;
  padding: 14px 16px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.score-card .team-name {
  font-size: 0.95rem;
  color: #f1f1f1;
  font-weight: 600;
  overflow-wrap: anywhere;
}

.score-card .team-score {
  flex: 0 0 auto;
  font-size: 1.05rem;
  font-weight: 700;
  color: #c8b6ff;
  font-variant-numeric: tabular-nums;
}

.score-card.active-team {
  border: 2px solid #a855f7;
  background: rgba(168, 85, 247, 0.15);
}

.score-card.highlight {
  animation: scoreFlash 0.5s ease;
}

@keyframes scoreFlash {
  0%, 100% { background: rgba(255, 255, 255, 0.08); }
  50% { background: rgba(0, 184, 148, 0.3); }
}

.btn-end {
  background: rgba(255, 255, 255, 0.08);
  color: #e17055;
  font-size: 0.9rem;
}

/* Result Page */
.final-scores {
  margin: 30px 0;
}

.final-score-card {
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: rgba(255, 255, 255, 0.08);
  border-radius: 14px;
  padding: 18px 24px;
  margin-bottom: 12px;
  transition: all 0.3s;
}

.final-score-card.rank-1 {
  background: linear-gradient(135deg, rgba(255, 215, 0, 0.2), rgba(255, 165, 0, 0.15));
  border: 2px solid rgba(255, 215, 0, 0.5);
  font-size: 1.2rem;
}

.final-score-card .rank {
  font-size: 1.5rem;
  margin-right: 15px;
}

.final-score-card .team-info {
  flex: 1;
}

.final-score-card .team-info .name {
  font-weight: 600;
  font-size: 1.1rem;
}

.final-score-card .score {
  font-size: 1.5rem;
  font-weight: 700;
  color: #a29bfe;
}

.result-actions {
  margin-top: 20px;
}

/* Responsive */
@media (max-width: 480px) {
  body {
    padding: 12px;
    padding-bottom: calc(12px + env(safe-area-inset-bottom));
  }

  .page {
    padding: 20px 12px;
  }

  .title { font-size: 2rem; }
  .timer { font-size: 2rem; }
  .game-header {
    flex-direction: column;
    gap: 8px;
    margin-bottom: 16px;
  }
  #player-container {
    margin-bottom: 12px;
  }
  .host-song-title {
    font-size: 1.05rem;
  }
  .game-controls { grid-template-columns: 1fr 1fr; }
  .team-names { grid-template-columns: 1fr; }
  .scoreboard-teams { grid-template-columns: 1fr; }
  .current-turn {
    flex-direction: column;
    gap: 6px;
  }
}