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

body {
  background: radial-gradient(circle at center, #020617, #000);
  color: #e5e7eb;
  font-family: system-ui, sans-serif;
  overflow: hidden;
}

canvas {
  position: fixed;
  inset: 0;
}

.panel {
  position: absolute;
  top: 2rem;
  left: 2rem;
  width: 240px;
  background: linear-gradient(
    135deg,
    rgba(255, 255, 255, 0.06),
    rgba(255, 255, 255, 0.02)
  );
  backdrop-filter: blur(14px);
  padding: 1.4rem;
  border-radius: 18px;
  box-shadow:
    0 0 40px rgba(255, 255, 255, 0.15),
    inset 0 0 20px rgba(255, 255, 255, 0.05);
}

h1 {
  font-size: 1.4rem;
}

p {
  font-size: 0.8rem;
  opacity: 0.7;
  margin-bottom: 1rem;
}

label {
  display: block;
  font-size: 0.75rem;
  margin-bottom: 0.7rem;
}

input[type="range"] {
  width: 100%;
  margin-top: 0.3rem;
}

button {
  width: 100%;
  margin-top: 0.6rem;
  padding: 0.6rem;
  background: rgba(0, 0, 0, 0.6);
  color: #fff;
  border: 1px solid rgba(255, 255, 255, 0.15);
  border-radius: 10px;
  cursor: pointer;
}

button:hover {
  background: rgba(255, 255, 255, 0.08);
}