:root {
  font-family: system-ui, -apple-system, Segoe UI, Roboto, Arial, sans-serif;
}

body {
  margin: 0;
  background: #0f0f12;
  color: #f5f5f7;
}

#app {
  max-width: 520px;
  margin: 0 auto;
  padding: 16px;
}

header h1 {
  margin: 8px 0 4px;
  font-size: 24px;
}

header p {
  margin: 0 0 12px;
  opacity: 0.9;
}

.card {
  background: rgba(255,255,255,0.06);
  border: 1px solid rgba(255,255,255,0.10);
  border-radius: 16px;
  padding: 16px;
  position: relative;
  overflow: hidden;
}

.row {
  display: flex;
  gap: 12px;
  align-items: center;
  justify-content: center;
  margin-top: 12px;
}

button {
  border: 0;
  border-radius: 999px;
  padding: 12px 16px;
  font-size: 16px;
  cursor: pointer;
}

.btn-yes {
  background: #ff4d7d;
  color: #0f0f12;
  font-weight: 700;
}

.btn-no {
  background: rgba(255,255,255,0.14);
  color: #f5f5f7;
  position: absolute;
}

.canvas-wrap {
  display: grid;
  place-items: center;
}

canvas {
  width: 100%;
  max-width: 420px;
  border-radius: 16px;
  background: rgba(255,255,255,0.06);
  border: 1px solid rgba(255,255,255,0.10);
  touch-action: none;
}

.notice {
  opacity: 0.9;
  margin-top: 10px;
}

a.link {
  color: #ffb3c7;
  text-decoration: underline;
}