.screen-welcome {
  max-width: 480px;
  margin: 60px auto 0 auto;
  background: #fff;
  border-radius: 16px;
  box-shadow: 0 4px 24px rgba(0,0,0,0.08);
  padding: 32px 24px 24px 24px;
  text-align: center;
}
.screen-title {
  font-size: 2rem;
  font-weight: bold;
  margin-bottom: 12px;
}
.screen-desc {
  color: #444;
  font-size: 1rem;
  margin-bottom: 18px;
  text-align: left;
}
.screen-resolution {
  font-size: 1.1rem;
  color: #007aff;
  margin-bottom: 18px;
}
.screen-actions {
  margin-top: 12px;
}
.screen-actions button {
  background: #007aff;
  color: #fff;
  border: none;
  border-radius: 6px;
  padding: 10px 22px;
  font-size: 1rem;
  margin: 0 8px;
  cursor: pointer;
  transition: background 0.2s;
}
.screen-actions button:hover {
  background: #005bb5;
}
.screen-test-area {
  width: 100vw;
  height: 100vh;
  position: fixed;
  left: 0; top: 0;
  z-index: 1000;
  background: #000;
  display: flex;
  align-items: center;
  justify-content: center;
}
.screen-test-finish {
  position: fixed;
  left: 0; top: 0;
  width: 100vw;
  height: 100vh;
  background: rgba(255,255,255,0.96);
  z-index: 2000;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  font-size: 2rem;
  color: #222;
}