*, *::before, *::after {
  box-sizing: border-box;
}

body {
  font-family: system-ui, "Segoe UI", Roboto, Helvetica, Arial, sans-serif, "Apple Color Emoji", "Segoe UI Emoji", "Segoe UI Symbol";
  margin: 0;
  background: #f8fafc;
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 100vh;
  padding: 20px;
}

.slider-box {
  background: #ffffff;
  padding: 40px;
  border-radius: 20px;
  width: 100%;
  max-width: 500px;
  box-shadow: 0 20px 40px -10px rgba(0, 0, 0, 0.1);
  border: 1px solid #e2e8f0;
}

.slider-header h3 {
  margin: 0 0 40px 0;
  color: #0f172a;
  text-align: center;
}

.custom-slider-container {
  position: relative;
  height: 30px;
  display: flex;
  align-items: center;
  cursor: pointer;
  touch-action: none;
}

.slider-track {
  width: 100%;
  height: 8px;
  background: #e2e8f0;
  border-radius: 4px;
  position: relative;
}

.slider-fill {
  position: absolute;
  top: 0;
  left: 0;
  height: 100%;
  width: 50%;
  background: #3b82f6;
  border-radius: 4px;
  pointer-events: none;
}

.slider-thumb {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 24px;
  height: 24px;
  background: #ffffff;
  border: 3px solid #3b82f6;
  border-radius: 50%;
  box-shadow: 0 4px 6px rgba(0,0,0,0.1);
  transition: transform 0.2s, box-shadow 0.2s;
  z-index: 10;
}

.custom-slider-container:active .slider-thumb {
  transform: translate(-50%, -50%) scale(1.2);
  box-shadow: 0 8px 15px rgba(59, 130, 246, 0.3);
}

.slider-tooltip {
  position: absolute;
  bottom: 40px;
  left: 50%;
  transform: translateX(-50%) scale(0);
  background: #0f172a;
  color: #ffffff;
  padding: 8px 12px;
  border-radius: 8px;
  font-weight: 600;
  font-size: 0.9rem;
  opacity: 0;
  transition: transform 0.2s cubic-bezier(0.34, 1.56, 0.64, 1), opacity 0.2s;
  pointer-events: none;
}

.slider-tooltip::after {
  content: "";
  position: absolute;
  top: 100%;
  left: 50%;
  transform: translateX(-50%);
  border-width: 6px;
  border-style: solid;
  border-color: #0f172a transparent transparent transparent;
}

.custom-slider-container:active .slider-tooltip,
.custom-slider-container:hover .slider-tooltip {
  transform: translateX(-50%) scale(1);
  opacity: 1;
}

.slider-labels {
  display: flex;
  justify-content: space-between;
  margin-top: 16px;
  color: #64748b;
  font-weight: 500;
  font-size: 0.9rem;
}

const container = document.getElementById("slider-container");
const thumb = document.getElementById("slider-thumb");
const fill = document.getElementById("slider-fill");
const tooltip = document.getElementById("slider-tooltip");

let isDragging = false;

function updateSlider(e) {
  const rect = container.getBoundingClientRect();
  let x = e.clientX - rect.left;
  
  /* Clamp bounds safely */
  if (x < 0) x = 0;
  if (x > rect.width) x = rect.width;
  
  const percentage = (x / rect.width) * 100;
  
  thumb.style.left = percentage + "%";
  fill.style.width = percentage + "%";
  
  /* Calculate value based on 10000 max */
  const value = Math.round((percentage / 100) * 10000);
  
  /* Format number with commas securely */
  tooltip.innerText = "$" + value.toLocaleString();
}

container.addEventListener("pointerdown", function(e) {
  isDragging = true;
  container.setPointerCapture(e.pointerId);
  updateSlider(e);
});

container.addEventListener("pointermove", function(e) {
  if (isDragging) {
    updateSlider(e);
  }
});

container.addEventListener("pointerup", function() {
  isDragging = false;
});

container.addEventListener("pointercancel", function() {
  isDragging = false;
});