body {
  margin: 0;
  overflow: hidden;
  background-color: #000;
  font-family: 'Arial', sans-serif;
}

canvas {
  display: block;
}



/* === START OVERLAY STYLES === */
.start-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(135deg, #1a1a2e 0%, #16213e 100%);
  display: flex;
  justify-content: center;
  align-items: center;
  z-index: 100;
  opacity: 1;
  transition: opacity 1s ease-out, visibility 1s;
  visibility: visible;
}

.start-container {
  text-align: center;
  transform: translateY(0);
  transition: all 1s cubic-bezier(0.17, 0.67, 0.83, 0.67);
}

.start-overlay.hidden {
  opacity: 0;
  visibility: hidden;
}

.start-overlay.hidden .start-container {
  transform: translateY(-100px);
}

.start-overlay h1 {
  color: white;
  font-size: 2.5rem;
  margin-bottom: 40px;
  text-shadow: 0 0 10px rgba(0, 173, 181, 0.8);
}

.start-btn {
  padding: 15px 50px;
  font-size: 1.5rem;
  background: transparent;
  color: white;
  border: 3px solid white;
  border-radius: 50px;
  cursor: pointer;
  transition: all 0.4s ease;
  position: relative;
  overflow: hidden;
  letter-spacing: 2px;
  font-weight: bold;
}

.start-btn::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 173, 181, 0.2);
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform 0.5s ease;
  z-index: -1;
}

.start-btn:hover::before {
  transform: scaleX(1);
}

.start-btn:hover {
  background: rgba(0, 173, 181, 0.2);
  letter-spacing: 5px;
  box-shadow: 0 0 20px rgba(0, 173, 181, 0.6);
}