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

body {
  background-color: #01010a;
  color: #00fff2;
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  text-align: center;
  overflow: hidden;
}

header {
  background: linear-gradient(135deg, #00ffcc, #007a70);
  color: #000;
  padding: 20px 0;
  box-shadow: 0 0 20px #00fff2;
}

h1 {
  text-shadow: 0 0 10px #00ffe1;
  margin-bottom: 10px;
}

nav a {
  margin: 0 15px;
  color: black;
  text-decoration: none;
  font-weight: bold;
  background: #00fff2;
  padding: 8px 16px;
  border-radius: 8px;
  box-shadow: 0 0 10px #00fff2;
  transition: 0.2s;
}

nav a:hover {
  background: #00bfa6;
  box-shadow: 0 0 20px #00ffe1, 0 0 40px #00ffe1;
}

canvas {
  display: block;
  margin: 40px auto;
  background: radial-gradient(circle at center, #001a1a 0%, #000 100%);
  box-shadow: 0 0 40px #00fff2;
  border-radius: 12px;
}