* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  min-height: 100vh;
  display: flex;
  justify-content: center;
  align-items: center;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  font-family: 'Arial', sans-serif;
}

.glow-button {
  position: relative;
  padding: 20px 60px;
  font-size: 18px;
  font-weight: bold;
  color: #fff;
  background: linear-gradient(45deg, #00d2ff, #3a47d5);
  border: none;
  border-radius: 50px;
  cursor: pointer;
  overflow: hidden;
  transition: all 0.3s ease;
  box-shadow: 0 0 20px rgba(0, 210, 255, 0.4),
              0 0 40px rgba(58, 71, 213, 0.3);
}

.glow-button::before {
  content: '';
  position: absolute;
  top: -2px;
  left: -2px;
  right: -2px;
  bottom: -2px;
  background: linear-gradient(45deg,
    #00d2ff,
    #3a47d5,
    #ff0080,
    #ff8c00,
    #00d2ff);
  background-size: 400%;
  border-radius: 50px;
  z-index: -1;
  filter: blur(8px);
  opacity: 0;
  transition: opacity 0.3s ease;
  animation: glowing 8s linear infinite;
}

@keyframes glowing {
  0% { background-position: 0 0; }
  50% { background-position: 400% 0; }
  100% { background-position: 0 0; }
}

.glow-button:hover::before {
  opacity: 1;
}

.glow-button:hover {
  transform: translateY(-2px);
  box-shadow: 0 0 30px rgba(0, 210, 255, 0.6),
              0 0 60px rgba(58, 71, 213, 0.5),
              0 0 80px rgba(255, 0, 128, 0.3);
}

.glow-button:active {
  transform: translateY(0);
  box-shadow: 0 0 20px rgba(0, 210, 255, 0.4),
              0 0 40px rgba(58, 71, 213, 0.3);
}

.glow-text {
  position: relative;
  z-index: 1;
  letter-spacing: 2px;
  text-shadow: 0 0 10px rgba(255, 255, 255, 0.5);
}

.glow-effect {
  position: absolute;
  width: 100%;
  height: 100%;
  top: 0;
  left: 0;
  background: radial-gradient(circle, rgba(255, 255, 255, 0.3) 0%, transparent 70%);
  opacity: 0;
  transform: scale(0);
  transition: all 0.5s ease;
  pointer-events: none;
}

.glow-button.clicked .glow-effect {
  opacity: 1;
  transform: scale(2);
  transition: all 0.6s ease;
}

.glow-button.clicked {
  animation: pulse 0.3s ease;
}

@keyframes pulse {
  0%, 100% { transform: scale(1); }
  50% { transform: scale(0.95); }
}