.k-shift { color: #c99200; }
  .k-alpha { color: #d23b3b; }
  .k-orange { background: linear-gradient(#ffb15a, #ef7a1a); color: #2a1404; }
  .k-red { background: linear-gradient(#f07171, #d32626); color: white; }
  .row5 .kw > button { min-height: 42px; font-size: 18px; }
  .hint { text-align: center; color: #526070; font-size: 12px; margin: 10px 0 0; }
  .subnote { text-align: center; color: #5c6b7a; font-size: 12px; margin: 6px 8px 0; }
  /* invader */
  .lcd8wrap { margin: 8px 6px; }
  .tag { text-align: center; color: #8d1d1d; font-weight: 800; font-size: 13px; margin-bottom: 6px; }
  .lcd8 {
    background: linear-gradient(#d7e4c8, #c5d6b2); border-radius: 10px; padding: 16px 8px 12px;
    display: flex; justify-content: space-between; box-shadow: inset 0 0 0 3px #93a684;
    position: relative; min-height: 110px;
  }
  .dig { width: 36px; height: 62px; position: relative; }
  .dig i { position: absolute; background: #102416; opacity: .14; border-radius: 2px; }
  .dig i.lit { opacity: 1; }
  .dig i.a { left: 8px; top: 3px; width: 20px; height: 5px; }
  .dig i.g { left: 8px; top: 28px; width: 20px; height: 5px; }
  .dig i.d { left: 8px; top: 53px; width: 20px; height: 5px; }
  .dig i.f { left: 3px; top: 8px; width: 5px; height: 20px; }
  .dig i.b { right: 3px; top: 8px; width: 5px; height: 20px; }
  .dig i.e { left: 3px; top: 33px; width: 5px; height: 20px; }