/* Reset cơ bản */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body,
html {
  margin: 0;
  padding: 0;
  height: 100%;
  width: 100%;
  overflow: hidden;
  flex-direction: column;
}

body {
  background: #000;
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  color: #fff;
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 100vh;
}

.content {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  width: 360px;
  height: 100vh;
}