* {
    margin: 0;
    box-sizing: border-box;
  }
  
  html {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen, Ubuntu, Cantarell, "Open Sans",
      "Helvetica Neue", sans-serif;
    font-size: 16px;
    line-height: 1.5;
    color: #FFD662;
  }
  
  body {
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    width: 100%;
    height: 100vh;
    margin: 0 auto;
    background-color: #fff;
  }
  
  body::after {
    content: "@yejinc";
    display: block;
    margin-top: 50px;
    color: #331B3F;
    font-size: 12px;
    font-weight: 600;
  }
  
  .banner {
    position: relative;
    flex-grow: 0;
    flex-shrink: 0;
    padding: 40px 36px 36px;
    border-radius: 12px;
    background-color: #00539C;
    transition: box-shadow 250ms ease-in, transform 250ms ease-in;
  }
  
  .banner:hover {
    transform: translateY(-1px);
    box-shadow: 0 5px 10px 0 rgba(0, 0, 0, 0.3);
  }
  
  h1 {
    margin-bottom: 20px;
    font-size: 24px;
    line-height: 1.35;
    font-weight: 600;
    letter-spacing: -0.025em;
    color: #FFD662;
  }
  
  p {
    margin-bottom: 28px;
    font-size: 14px;
    line-height: 1.5;
    color: #FFD662;
    letter-spacing: 0.01em;
  }
  
  a {
    display: flex;
    justify-content: center;
    align-items: center;
    width: 100%;
    min-width: 320px;
    height: 65px;
    border-radius: 6px;
    color: #111;
    font-size: 18px;
    font-weight: 700;
    letter-spacing: 0.01em;
    text-decoration: none;
    background: linear-gradient(90deg, #FFD662 0%, #00F8E0 100%);
  }