.face-expression {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
  padding: 8px 0;
}

.face-expression-preview {
  position: relative;
  width: 100%;
  max-width: 320px;
  aspect-ratio: 4/3;
  background: #111;
  border-radius: 8px;
  overflow: hidden;
}

.face-expression-video {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.face-expression-overlay {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  background: rgba(0,0,0,.6);
  color: #fff;
  font-size: 13px;
  padding: 6px 10px;
  text-align: center;
}

.face-expression-status {
  font-size: 14px;
  color: #444;
  text-align: center;
}

.face-expression-start {
  background: #488ddd;
  border: none;
  border-radius: 4px;
  color: #fff;
  cursor: pointer;
  font-family: 'Roboto', sans-serif;
  font-size: 15px;
  padding: 10px 24px;
}

.face-expression-start:hover { background: #62a5f1; }
.face-expression-start:disabled { opacity: .6; cursor: not-allowed; }