Custom Range Slider

<div class="range-slider-container">
  <div class="range-slider-labels">
    <span>0</span>
    <span>25</span>
    <span>50</span>
    <span>75</span>
    <span>100</span>
  </div>
  <div class="range-slider">
    <input type="range" min="0" max="100" value="50" class="range-slider-input" id="range-input">
    <div class="range-slider-progress"></div>
    <div class="range-slider-tooltip">50</div>
  </div>
  <div class="range-value">Value: <span id="range-value">50</span></div>
</div>

.range-slider-container {
  width: 100%;
  max-width: 400px;
  padding: 20px;
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
}

.range-slider {
  position: relative;
  height: 40px;
  display: flex;
  align-items: center;
}

.range-slider-input {
  -webkit-appearance: none;
  width: 100%;
  height: 8px;
  background: #e6e6e6;
  border-radius: 10px;
  outline: none;
  z-index: 2;
}

.range-slider-progress {
  position: absolute;
  left: 0;
  top: 50%;
  transform: translateY(-50%);
  height: 8px;
  width: 50%;
  background: linear-gradient(90deg, #6a11cb, #2575fc);
  border-radius: 10px;
  z-index: 1;
  pointer-events: none;
}

.range-slider-input::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 22px;
  height: 22px;
  border-radius: 50%;
  background: #ffffff;
  border: 2px solid #2575fc;
  box-shadow: 0 2px 5px rgba(0, 0, 0, 0.2);
  cursor: pointer;
  transition: all 0.2s ease-in-out;
  z-index: 3;
}

.range-slider-input::-moz-range-thumb {
  width: 22px;
  height: 22px;
  border-radius: 50%;
  background: #ffffff;
  border: 2px solid #2575fc;
  box-shadow: 0 2px 5px rgba(0, 0, 0, 0.2);
  cursor: pointer;
  transition: all 0.2s ease-in-out;
  z-index: 3;
}

.range-slider-input::-webkit-slider-thumb:hover {
  transform: scale(1.1);
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.3);
}

.range-slider-input::-moz-range-thumb:hover {
  transform: scale(1.1);
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.3);
}

.range-slider-labels {
  display: flex;
  justify-content: space-between;
  margin-bottom: 10px;
  font-size: 12px;
  color: #666;
}

.range-slider-tooltip {
  position: absolute;
  top: -35px;
  left: 50%;
  transform: translateX(-50%);
  background: linear-gradient(135deg, #6a11cb, #2575fc);
  color: white;
  padding: 4px 8px;
  border-radius: 4px;
  font-size: 12px;
  opacity: 0;
  transition: opacity 0.2s ease;
  pointer-events: none;
}

.range-slider-tooltip::after {
  content: '';
  position: absolute;
  bottom: -5px;
  left: 50%;
  transform: translateX(-50%);
  border-width: 5px 5px 0;
  border-style: solid;
  border-color: #2575fc transparent transparent;
}

.range-slider-input:hover + .range-slider-progress + .range-slider-tooltip {
  opacity: 1;
}

.range-value {
  margin-top: 15px;
  text-align: center;
  font-size: 14px;
  font-weight: 500;
}

/* Dark mode styling */
@media (prefers-color-scheme: dark) {
  .range-slider-input {
    background: #444;
  }
  
  .range-slider-input::-webkit-slider-thumb {
    background: #222;
    border-color: #6a11cb;
  }
  
  .range-slider-input::-moz-range-thumb {
    background: #222;
    border-color: #6a11cb;
  }
  
  .range-slider-labels {
    color: #aaa;
  }
  
  .range-value {
    color: #eee;
  }
}

document.addEventListener('DOMContentLoaded', function() {
  const rangeInput = document.getElementById('range-input');
  const rangeValue = document.getElementById('range-value');
  const rangeProgress = document.querySelector('.range-slider-progress');
  const rangeTooltip = document.querySelector('.range-slider-tooltip');
  
  // Update range slider on input change
  function updateRange() {
    const value = rangeInput.value;
    const percentage = (value - rangeInput.min) / (rangeInput.max - rangeInput.min) * 100;
    
    // Update progress bar width
    rangeProgress.style.width = `${percentage}%`;
    
    // Update tooltip value and position
    rangeTooltip.textContent = value;
    rangeTooltip.style.left = `${percentage}%`;
    
    // Update displayed value
    rangeValue.textContent = value;
  }
  
  // Set initial state
  updateRange();
  
  // Listen for input changes
  rangeInput.addEventListener('input', updateRange);
  
  // Show tooltip on hover
  rangeInput.addEventListener('mouseenter', function() {
    rangeTooltip.style.opacity = '1';
  });
  
  rangeInput.addEventListener('mouseleave', function() {
    rangeTooltip.style.opacity = '0';
  });
});