:root {
  --font-title: 18px;
  --grad-start: #d580ff;
  --grad-end: #ffaa00;
  --grad-ded: 135;
}

canvas {
  cursor: all-scroll;
  display: -webkit-box;
  display: -webkit-flex;
  display: -ms-flexbox;
  display: flex;
  -webkit-box-pack: center;
  -webkit-justify-content: center;
      -ms-flex-pack: center;
          justify-content: center;
  -webkit-box-align: center;
  -webkit-align-items: center;
      -ms-flex-align: center;
          align-items: center;
  height: 100vh;
  padding: 20px;
  background: -webkit-linear-gradient(var(--grad-deg), var(--grad-start), var(--grad-end));
  background: linear-gradient(var(--grad-deg), var(--grad-start), var(--grad-end));
}

p {
  position: relative;
  padding: 5px 10px;
  border: 1px solid currentColor;
  border-radius: var(--font-title);
  font: 100 var(--font-title)/1 sans-serif;
  text-align: center;
  text-transform: uppercase;
  letter-spacing: 3px;
  color: #fff;
}
p::before, p::after {
  position: absolute;
  display: block;
  width: 100%;
  padding: 5px;
  font-size: 12px;
  color: #fff;
}
p::before {
  content: attr(data-gradStart);
  bottom: 100%;
}
p::after {
  content: attr(data-gradEnd);
  top: 100%;
}