/* minimal ptb-style Game Over overlay (from pop-the-balloon-challenge) */
.ptb-overlay {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(12, 14, 22, 0.68);
  backdrop-filter: blur(8px);
  z-index: 30;
}

.ptb-overlay-card {
  width: min(440px, calc(100% - 48px));
  background: rgba(255, 255, 255, 0.92);
  border: 1px solid rgba(0, 0, 0, 0.06);
  border-radius: 22px;
  padding: 22px 22px 20px;
  text-align: center;
  box-shadow: 0 28px 70px rgba(0, 0, 0, 0.35);
  position: relative;
  z-index: 1;
}

.ptb-overlay-title {
  font-size: 2.1rem;
  font-weight: 900;
  color: #0d1020;
  letter-spacing: 0.01em;
}

.ptb-score-label {
  margin-top: 16px;
  font-size: 1rem;
  font-weight: 800;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: rgba(13, 16, 32, 0.55);
}

.ptb-score-label-tight {
  margin-top: 12px;
}

.ptb-score {
  margin-top: 6px;
  font-size: 4.1rem;
  font-weight: 900;
  line-height: 1;
  color: #0d1020;
}

.ptb-score-small {
  font-size: 2.4rem;
  opacity: 0.9;
}

.ptb-overlay-btn {
  margin-top: 18px;
  padding: 12px 42px;
  border-radius: 999px;
  border: none;
  cursor: pointer;
  color: #fff;
  font-weight: 900;
  font-size: 1.1rem;
  background: linear-gradient(90deg, #111 0%, #2a2f4a 100%);
  box-shadow: 0 18px 44px rgba(0, 0, 0, 0.22);
}

.stack-section {
  max-width: 780px;
  margin: 10px auto 0 auto;
  padding: 0;
  background: linear-gradient(180deg, rgba(255, 255, 255, 0));
  border-radius: 18px;
  box-shadow: 0 4px 24px rgba(0, 0, 0, 0.74);
  display: flex;
  flex-direction: column;
  align-items: center;
  position: relative;
  overflow: hidden;
}

.stack-section::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(120deg, rgba(255, 255, 255, 0.65), rgba(255, 255, 255, 0) 40%);
  pointer-events: none;
  opacity: 0.55;
}

.canvas-wrap {
  width: 100%;
  border-radius: 16px;
  overflow: hidden;
  background: #FAE9D5;
  position: relative;
  z-index: 1;
}

#wood-canvas {
  width: 100%;
  height: 740px;
  display: block;
  touch-action: none;
}

.stack-hint {
  margin-top: 10px;
  font-weight: 700;
  color: rgba(0, 0, 0, 0.55);
  position: relative;
  z-index: 1;
}

@media (max-width: 1000px) {
  .stack-section {
    max-width: 90%;
    margin: 20px auto 0 auto;
    padding: 12px 14px;
  }

  #wood-canvas {
    height: 560px;
  }

  .ptb-overlay {
    align-items: center;
    justify-content: center;
  }

  .ptb-overlay-card {
    padding: 14px 14px !important;
    width: min(400px, calc(100% - 32px));
    border-radius: 16px;
  }

  .ptb-overlay-title {
    font-size: 1.6rem !important;
  }

  .ptb-score-label {
    font-size: 1rem !important;
  }

  .ptb-score {
    font-size: 3.2rem !important;
  }

  .ptb-score-small {
    font-size: 2rem !important;
  }

  .ptb-overlay-btn {
    padding: 12px 30px !important;
    font-size: 1.02rem !important;
  }
}

@media (max-width: 800px) {
  .stack-section {
    max-width: 90%;
    margin: 20px auto 0 auto;
    padding: 12px 14px;
  }

  #wood-canvas {
    height: 420px;
  }

  .ptb-overlay {
    align-items: center;
    justify-content: center;
  }

  .ptb-overlay-card {
    padding: 12px 12px !important;
    width: min(380px, calc(100% - 28px));
    border-radius: 14px;
  }

  .ptb-overlay-title {
    font-size: 1.5rem !important;
  }

  .ptb-score-label {
    font-size: 0.95rem !important;
  }

  .ptb-score {
    font-size: 2.8rem !important;
  }

  .ptb-score-small {
    font-size: 1.8rem !important;
  }

  .ptb-overlay-btn {
    padding: 10px 24px !important;
    font-size: 1rem !important;
  }
}

@media (max-width: 600px) {
  .stack-section {
    max-width: 90%;
    margin: 20px auto 0 auto;
    padding: 12px 14px;
  }

  #wood-canvas {
    height: 320px;
  }

  .ptb-overlay {
    align-items: center;
    justify-content: center;
  }

  .ptb-overlay-card {
    padding: 12px 12px !important;
    width: min(360px, calc(100% - 24px));
    border-radius: 14px;
  }

  .ptb-overlay-title {
    font-size: 1.4rem !important;
  }

  .ptb-score-label {
    font-size: 0.9rem !important;
  }

  .ptb-score {
    font-size: 2.4rem !important;
  }

  .ptb-score-small {
    font-size: 1.6rem !important;
  }

  .ptb-overlay-btn {
    padding: 10px 20px !important;
    font-size: 0.95rem !important;
  }
}