* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: 'Arial', sans-serif;
}

body {
  background: #000;
  color: #fff;
  overflow: hidden;
}

/* 背景グラデーション */
.bg {
  position: fixed;
  width: 100%;
  height: 100%;
  background: radial-gradient(circle at center, #111 0%, #000 70%);
  z-index: -1;
}

/* 中央配置 */
.container {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  text-align: center;
}

/* ロゴ */
.logo {
  font-size: 48px;
  letter-spacing: 5px;
  margin-bottom: 20px;
}

/* ライン */
.line {
  width: 80px;
  height: 4px;
  background: #0ff;
  margin: 20px auto;
  box-shadow: 0 0 10px #0ff;
}

/* タイトル */
.title {
  font-size: 36px;
  letter-spacing: 8px;
  margin-bottom: 10px;
  animation: flicker 2s infinite;
}

.subtitle {
  color: #aaa;
  margin-bottom: 40px;
}

/* カウントダウン */
#countdown {
  display: flex;
  justify-content: center;
  gap: 20px;
}

#countdown div {
  text-align: center;
}

#countdown span {
  font-size: 32px;
  display: block;
}

#countdown small {
  font-size: 12px;
  color: #888;
}

/* ネオン点滅 */
@keyframes flicker {
  0%, 18%, 22%, 25%, 53%, 57%, 100% {
    opacity: 1;
  }
  20%, 24%, 55% {
    opacity: 0.4;
  }
}

/* レスポンシブ */
@media (max-width: 600px) {
  .title {
    font-size: 24px;
  }
  .logo {
    font-size: 32px;
  }
}