body {
  font-family: system-ui, sans-serif;
  background: #f5f6f7;
  margin: 0;
}

header {
  background: #222;
  color: #fff;
  padding: 12px 20px;
}

.container {
  padding: 20px;
}

.center {
  display: flex;
  align-items: center;
  justify-content: center;
  height: 100vh;
}

.card {
  background: #fff;
  padding: 24px;
  border-radius: 8px;
  width: 280px;
}

.card input {
  width: 100%;
  padding: 8px;
  margin: 8px 0;
}

.card button {
  width: 100%;
  padding: 10px;
}

.progress {
  margin-top: 20px;
  background: #ddd;
  height: 16px;
  border-radius: 8px;
  overflow: hidden;
}

.progress div {
  height: 100%;
  width: 0%;
  background: #4caf50;
}