*, *::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: #ffffff;
}

.invert-workspace {
  position: relative;
  width: 100vw;
  height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  overflow: hidden;
  /* Hide the native browser cursor */
  cursor: none;
}

.invert-cursor {
  position: fixed;
  top: 0;
  left: 0;
  width: 60px;
  height: 60px;
  background-color: #ffffff;
  border-radius: 50%;
  pointer-events: none;
  z-index: 9999;
  transform: translate(-50%, -50%);
  /* The core magic of the inversion effect securely applied */
  mix-blend-mode: difference;
  will-change: left, top;
}

.massive-text {
  font-size: clamp(4rem, 15vw, 12rem);
  font-weight: 900;
  color: #000000;
  margin: 0 0 20px 0;
  letter-spacing: -2px;
  text-transform: uppercase;
}

.color-blocks {
  display: flex;
  gap: 20px;
  margin-bottom: 40px;
}

.block {
  width: 100px;
  height: 100px;
  border-radius: 20px;
}

.b-red { background: #ef4444; }
.b-green { background: #10b981; }
.b-blue { background: #3b82f6; }

.desc-text {
  max-width: 500px;
  text-align: center;
  font-size: 1.25rem;
  color: #000000;
  line-height: 1.6;
  font-weight: 500;
}

const cursor = document.getElementById("custom-cursor");
const area = document.getElementById("invert-area");

/* Update the physical position securely on move */
area.addEventListener("mousemove", function(e) {
  cursor.style.left = e.clientX + "px";
  cursor.style.top = e.clientY + "px";
});

/* Hide the cursor cleanly if the mouse leaves the window entirely */
area.addEventListener("mouseleave", function() {
  cursor.style.opacity = "0";
});

area.addEventListener("mouseenter", function() {
  cursor.style.opacity = "1";
});