.app {
  width: 100vw;
  height: 100vh;
  font-size: 14px;
  padding: 20px;
  box-sizing: border-box;
}
.header {
  margin-bottom: 30px;
  font-size: 18px;
  font-weight: 600;
  text-align: center;
}
.input {
  margin-bottom: 12px;
  color: #090909;
}
.title {
  line-height: 32px;
  font-size: 14px;
  font-weight: 600;
}
.input input {
  display: block;
  outline: none;
  width: 100%;
  line-height: 32px;
  border-bottom: 1px solid #ccc;
  border-radius: 0;
}
.tip {
  font-size: 12px;
  line-height: 20px;
  color: #999;
  margin-bottom: 18px;
}
.btn {
  width: 70%;
  margin: auto;
  line-height: 48px;
  text-align: center;
  background-color: #393939;
  color: #fff;
  border-radius: 8px;
  margin-top: 60px;
}
.btn:active {
  opacity: 0.8;
  transform: scale(0.99);
}