#ruleta-wrapper {
  text-align: center;
  font-family: 'Segoe UI', sans-serif;
  padding: 20px;
  position: relative;
}

/* File input styled via label */
.file-btn {
  display: block;
  width: 90vmin;
  max-width: 500px;
  margin: 10px auto;
  padding: 10px 20px;
  background-color: #28a745;
  color: white;
  border: none;
  border-radius: 8px;
  font-size: 16px;
  cursor: pointer;
  text-align: center;
  position: relative;
}

.file-btn input {
  display: none;
}

/* Spin button styled uniformly */
#ruleta-wrapper button {
  display: block;
  width: 90vmin;
  max-width: 500px;
  margin: 10px auto;
  padding: 10px 20px;
  background-color: #1E88E5;
  color: white;
  border: none;
  border-radius: 8px;
  font-size: 16px;
  cursor: pointer;
}

#ruleta-wrapper button:hover {
  background-color: #1565C0;
}

#wheel {
  border: 8px solid #555;
  border-radius: 50%;
  box-shadow: 0 8px 20px rgba(0,0,0,0.2);
  display: block;
  margin: 0 auto;
  width: 80vmin;
  height: 80vmin;
  max-width: 500px;
  max-height: 500px;
}

/* Responsive adjustments */
@media (max-width: 600px) {
  .file-btn,
  #ruleta-wrapper button {
    width: 80vw;
    max-width: none;
  }
  #wheel {
    max-width: 80vw;
    max-height: 80vw;
  }
}