.fp-spacetech-astronaut-heart-rate-monitor-ui {
  --fp-container-width: 100%;
  --fp-max-width: 500px;
  --fp-aspect-ratio: 1 / 1;

  --fp-primary-color: #ffffff;
  --fp-secondary-color: #e2e8f0;
  --fp-muted-color: #94a3b8;
  --fp-soft-color: #f8fafc;
  --fp-background-color: transparent;

  --fp-info-color: #001f3f;
  --fp-warning-color: #bce3f6;
  --fp-danger-color: #8ed0ef;
  --fp-accent-color: #dcf1fb;

  width: var(--fp-container-width);
  max-width: var(--fp-max-width);
  margin: 0 auto;
  font-family: ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}

.fp-spacetech-astronaut-heart-rate-monitor-ui-stage {
  position: relative;
  width: 100%;
  aspect-ratio: var(--fp-aspect-ratio);
  background: var(--fp-primary-color);
  border: 1px solid var(--fp-secondary-color);
  border-radius: 16px;
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 10px 30px rgba(0, 31, 63, 0.05);
}

.fp-spacetech-astronaut-heart-rate-monitor-ui-grid {
  position: absolute;
  inset: 0;
  background-image: 
    linear-gradient(to right, var(--fp-soft-color) 1px, transparent 1px),
    linear-gradient(to bottom, var(--fp-soft-color) 1px, transparent 1px);
  background-size: 20px 20px;
  opacity: 0.8;
  animation: fp-spacetech-astronaut-heart-rate-monitor-ui-breathe 4s ease-in-out infinite alternate;
}

.fp-spacetech-astronaut-heart-rate-monitor-ui-orbit {
  position: absolute;
  width: 80%;
  height: 80%;
  border: 1px dashed var(--fp-muted-color);
  border-radius: 50%;
  opacity: 0.3;
  animation: fp-spacetech-astronaut-heart-rate-monitor-ui-spin 30s linear infinite;
}

.fp-spacetech-astronaut-heart-rate-monitor-ui-orbit::before {
  content: '';
  position: absolute;
  top: -3px;
  left: 50%;
  transform: translateX(-50%);
  width: 6px;
  height: 6px;
  background-color: var(--fp-info-color);
  border-radius: 50%;
}

.fp-spacetech-astronaut-heart-rate-monitor-ui-core {
  position: relative;
  z-index: 10;
  width: 85%;
  height: 60%;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: space-between;
  background: var(--fp-primary-color);
  border: 1px solid var(--fp-accent-color);
  border-radius: 12px;
  padding: 20px;
  box-shadow: 0 0 20px var(--fp-accent-color);
}

.fp-spacetech-astronaut-heart-rate-monitor-ui-header {
  width: 100%;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.8rem;
  color: var(--fp-muted-color);
  letter-spacing: 1px;
  text-transform: uppercase;
  font-weight: 600;
  margin-bottom: 10px;
}

.fp-spacetech-astronaut-heart-rate-monitor-ui-status {
  display: flex;
  align-items: center;
  gap: 6px;
  color: var(--fp-info-color);
}

.fp-spacetech-astronaut-heart-rate-monitor-ui-status-dot {
  width: 8px;
  height: 8px;
  background-color: var(--fp-danger-color);
  border-radius: 50%;
  animation: fp-spacetech-astronaut-heart-rate-monitor-ui-pulse 1s ease-in-out infinite;
}

.fp-spacetech-astronaut-heart-rate-monitor-ui-vitals {
  display: flex;
  align-items: baseline;
  gap: 8px;
}

.fp-spacetech-astronaut-heart-rate-monitor-ui-bpm {
  font-size: 3.5rem;
  font-weight: 300;
  color: var(--fp-info-color);
  line-height: 1;
  font-variant-numeric: tabular-nums;
}

.fp-spacetech-astronaut-heart-rate-monitor-ui-bpm-label {
  font-size: 1rem;
  font-weight: 600;
  color: var(--fp-muted-color);
}

.fp-spacetech-astronaut-heart-rate-monitor-ui-display {
  width: 100%;
  flex-grow: 1;
  position: relative;
  border-radius: 8px;
  overflow: hidden;
  margin-top: 15px;
  background: linear-gradient(180deg, var(--fp-primary-color) 0%, var(--fp-soft-color) 100%);
}

.fp-spacetech-astronaut-heart-rate-monitor-ui-canvas {
  width: 100%;
  height: 100%;
  display: block;
}

@keyframes fp-spacetech-astronaut-heart-rate-monitor-ui-breathe {
  0% { transform: scale(1); opacity: 0.5; }
  100% { transform: scale(1.02); opacity: 0.9; }
}

@keyframes fp-spacetech-astronaut-heart-rate-monitor-ui-spin {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}

@keyframes fp-spacetech-astronaut-heart-rate-monitor-ui-pulse {
  0%, 100% { transform: scale(1); opacity: 1; box-shadow: 0 0 0 0 rgba(142, 208, 239, 0.7); }
  50% { transform: scale(1.2); opacity: 0.8; box-shadow: 0 0 0 6px rgba(142, 208, 239, 0); }
}

@media (max-width: 480px) {
  .fp-spacetech-astronaut-heart-rate-monitor-ui-core {
    width: 90%;
    height: 70%;
    padding: 15px;
  }
  .fp-spacetech-astronaut-heart-rate-monitor-ui-bpm {
    font-size: 2.8rem;
  }
}

document.querySelectorAll('.fp-spacetech-astronaut-heart-rate-monitor-ui').forEach(root => {
  const canvas = root.querySelector('.fp-spacetech-astronaut-heart-rate-monitor-ui-canvas');
  const bpmText = root.querySelector('.fp-spacetech-astronaut-heart-rate-monitor-ui-bpm');
  if (!canvas || !bpmText) return;

  const ctx = canvas.getContext('2d');
  let animationFrameId;
  let isVisible = true;
  let time = 0;
  
  const resizeCanvas = () => {
    const rect = canvas.parentElement.getBoundingClientRect();
    canvas.width = rect.width;
    canvas.height = rect.height;
  };

  const drawWave = () => {
    if (!isVisible) return;
    
    ctx.clearRect(0, 0, canvas.width, canvas.height);
    
    const width = canvas.width;
    const height = canvas.height;
    const centerY = height / 2;
    
    ctx.beginPath();
    ctx.strokeStyle = '#8ed0ef'; 
    ctx.lineWidth = 2;
    ctx.lineCap = 'round';
    ctx.lineJoin = 'round';

    const points = [];
    
    for (let x = 0; x < width; x++) {
      const nx = x + time * 100;
      let y = Math.sin(nx * 0.02) * 5;
      
      const beatCycle = nx % 200;
      if (beatCycle > 80 && beatCycle < 120) {
          const spike = Math.sin((beatCycle - 80) * Math.PI / 40);
          y -= spike * (height * 0.35);
      }

      points.push({x, y: centerY + y});
    }

    ctx.moveTo(points[0].x, points[0].y);
    for (let i = 1; i < points.length; i++) {
      ctx.lineTo(points[i].x, points[i].y);
    }

    ctx.shadowBlur = 8;
    ctx.shadowColor = '#dcf1fb';
    ctx.stroke();
    ctx.shadowBlur = 0;
    
    time += 0.02;
    
    if (Math.random() < 0.02) {
        const currentBpm = parseInt(bpmText.innerText, 10);
        const variation = Math.random() > 0.5 ? 1 : -1;
        let newBpm = currentBpm + variation;
        if (newBpm < 65) newBpm = 65;
        if (newBpm > 80) newBpm = 80;
        bpmText.innerText = newBpm;
    }

    animationFrameId = requestAnimationFrame(drawWave);
  };

  const handleVisibilityChange = () => {
    isVisible = document.visibilityState === 'visible';
    if (isVisible) {
      time = 0;
      drawWave();
    } else {
      cancelAnimationFrame(animationFrameId);
    }
  };

  const observer = new MutationObserver(() => {
    if (!document.body.contains(root)) {
      cancelAnimationFrame(animationFrameId);
      window.removeEventListener('resize', resizeCanvas);
      document.removeEventListener('visibilitychange', handleVisibilityChange);
      observer.disconnect();
    }
  });

  window.addEventListener('resize', resizeCanvas);
  document.addEventListener('visibilitychange', handleVisibilityChange);
  observer.observe(document.body, { childList: true, subtree: true });

  resizeCanvas();
  drawWave();
});