body {
  background: #121212;
  font-family: 'Roboto', sans-serif;
  color: #fff;
}

.hero {
  background: linear-gradient(135deg, #1a1a1a, #0d0d0d);
}

.box {
  background: rgba(0, 0, 0, 0.7);
  border-radius: 8px;
  padding: 20px;
  box-shadow: 0 4px 8px rgba(0, 0, 0, 0.2);
}

.has-background-dark-transparent {
  background: rgba(0, 0, 0, 0.7);
}

h1.title {
  font-size: 2.5rem;
  font-weight: 700;
}

button.image {
  transition: transform 0.2s;
}

button.image:hover {
  transform: scale(1.1);
}

.is-rounded {
  border-radius: 50%;
  box-shadow: 0 4px 6px rgba(0, 0, 0, 0.2);
}

.mdl-spinner {
  margin-top: 20px;
}

#loading-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.7);
  display: flex;
  justify-content: center;
  align-items: center;
  z-index: 1000;
  display: none;
}

.spinner {
  border: 16px solid #f3f3f3;
  border-radius: 50%;
  border-top: 16px solid #3498db;
  width: 120px;
  height: 120px;
  animation: spin 2s linear infinite;
}

@keyframes spin {
  0% { transform: rotate(0deg); }
  100% { transform: rotate(360deg); }
}