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

body {
  min-height: 100vh;
  font-family: 'Segoe UI', sans-serif;
  overflow: hidden;
  display: flex;
  justify-content: center;
  align-items: center;
}

/* FONDO CASINO */
.casino-bg {
  position: fixed;
  inset: 0;
  background:
    radial-gradient(circle at center, #0f3d2e, #021a13),
    repeating-radial-gradient(circle, rgba(255,255,255,0.03) 0 2px, transparent 2px 6px);
  z-index: -1;
}

/* CONTENEDOR */
.contenedor {
  text-align: center;
  color: gold;
}

h1 {
  margin-bottom: 20px;
  text-shadow: 0 0 10px rgba(255,215,0,.6);
}

/* RULETA */
.ruleta-wrapper {
  position: relative;
  width: 600px;
  height: 600px;
  margin: auto;
}

/* CANVAS */
canvas {
  width: 600px;
  height: 600px;
  border-radius: 50%;
  box-shadow:
    inset 0 0 30px rgba(0,0,0,.8),
    0 0 40px rgba(0,0,0,.9);
  background: #111;
}

/* BOLA */
.bola {
  position: absolute;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: radial-gradient(circle at 30% 30%, #fff, #ccc);
  z-index: 10;
}

/* SOMBRA DE LA BOLA */
.bola-sombra {
  position: absolute;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: rgba(0,0,0,0.4);
  filter: blur(4px);
  z-index: 5;
}

/* BOTÓN */
button {
  margin-top: 20px;
  padding: 12px 30px;
  font-size: 20px;
  border-radius: 30px;
  border: none;
  cursor: pointer;
  background: linear-gradient(145deg, gold, orange);
  color: #111;
  box-shadow: 0 5px 15px rgba(0,0,0,.6);
}

button:hover {
  transform: scale(1.05);
}

/* RESULTADO */
#resultado {
  margin-top: 20px;
  text-shadow: 0 0 10px gold;
}