Animated Progress Bar

<div class="progress-container">
  <div class="progress-circle">
    <svg class="progress-ring" width="120" height="120">
      <circle class="progress-ring-circle-bg" stroke="#ddd" stroke-width="8" fill="transparent" r="50" cx="60" cy="60"/>
      <circle class="progress-ring-circle" stroke="#6a11cb" stroke-width="8" fill="transparent" r="50" cx="60" cy="60" 
        stroke-dasharray="314.16" stroke-dashoffset="314.16"/>
    </svg>
    <div class="progress-text">0%</div>
  </div>
</div>

.progress-container {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 20px;
}

.progress-circle {
  position: relative;
  display: flex;
  justify-content: center;
  align-items: center;
}

.progress-ring {
  transform: rotate(-90deg);
}

.progress-ring-circle-bg {
  opacity: 0.3;
}

.progress-ring-circle {
  transition: stroke-dashoffset 0.5s ease-in-out;
}

.progress-text {
  position: absolute;
  font-size: 24px;
  font-weight: bold;
  color: var(--text-primary);
}

.progress-controls {
  display: flex;
  gap: 10px;
  margin-top: 10px;
}

.progress-btn {
  padding: 8px 12px;
  background: linear-gradient(135deg, #6a11cb, #2575fc);
  border: none;
  border-radius: 4px;
  color: white;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.2s ease;
}

.progress-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
}

/* Dark mode styles */
@media (prefers-color-scheme: dark) {
  .progress-ring-circle-bg {
    stroke: #444;
  }
  
  .progress-ring-circle {
    stroke: #8a3eff;
  }
}

/**
 * Set the progress value of the circular progress bar
 * @param {number} percent - The progress percentage (0-100)
 */
function setProgress(percent) {
  // Find the progress circle element
  const circle = document.querySelector('.progress-ring-circle');
  const text = document.querySelector('.progress-text');
  
  if (!circle || !text) return;
  
  // Calculate the circumference
  const radius = circle.getAttribute('r');
  const circumference = 2 * Math.PI * radius;
  
  // Update the circle stroke offset based on percentage
  const offset = circumference - (percent / 100 * circumference);
  circle.style.strokeDasharray = `${circumference} ${circumference}`;
  circle.style.strokeDashoffset = offset;
  
  // Update the text with animation
  animateCounter(text, parseInt(text.textContent) || 0, percent);
}

/**
 * Animate the percentage counter
 * @param {Element} element - The element containing the percentage text
 * @param {number} start - Starting percentage
 * @param {number} end - Target percentage
 */
function animateCounter(element, start, end) {
  let current = start;
  const increment = end > start ? 1 : -1;
  const duration = 500; // ms
  const steps = Math.abs(end - start);
  const stepTime = steps > 0 ? duration / steps : duration;
  
  const timer = setInterval(() => {
    current += increment;
    element.textContent = `${current}%`;
    
    if ((increment > 0 && current >= end) || 
        (increment < 0 && current <= end)) {
      element.textContent = `${end}%`;
      clearInterval(timer);
    }
  }, stepTime);
}

// Initialize with a starting value
document.addEventListener('DOMContentLoaded', () => {
  // Set initial progress to 0%
  setProgress(0);
  
  // If you want to add control buttons
  const controls = document.querySelectorAll('.progress-btn');
  if (controls.length) {
    controls.forEach(btn => {
      btn.addEventListener('click', () => {
        const value = parseInt(btn.dataset.value);
        setProgress(value);
      });
    });
  } else {
    // Demonstrate animation if no controls exist
    setTimeout(() => setProgress(75), 500);
  }
});