* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: Inter, Arial, sans-serif;
  background: #ffffff;
  color: #111111;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.site-header {
  text-align: center;
  padding: 24px 16px 8px;
}

.logo {
  font-size: 28px;
  font-weight: 700;
  letter-spacing: 2px;
}

.ad-container {
  width: 100%;
  max-width: 728px;
  min-height: 60px;
  margin: 12px auto;
  padding: 8px;
  border: 1px dashed #cccccc;
  color: #666666;
  font-size: 12px;
  text-align: center;
  display: flex;
  align-items: center;
  justify-content: center;
}

.game-wrap {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 16px;
}

.screen {
  text-align: center;
  max-width: 400px;
  width: 100%;
}

.subtitle {
  color: #666666;
  font-size: 16px;
  margin-bottom: 24px;
}

.best-preview {
  margin-top: 20px;
  color: #666666;
  font-size: 14px;
}

.btn {
  background: #111111;
  color: #ffffff;
  border: none;
  font-family: inherit;
  font-size: 16px;
  font-weight: 700;
  letter-spacing: 1px;
  padding: 16px 40px;
  cursor: pointer;
}

.btn:focus-visible,
.game-area:focus-visible {
  outline: 3px solid #1e88e5;
  outline-offset: 2px;
}

.link-btn {
  display: block;
  margin: 16px auto 0;
  background: none;
  border: none;
  color: #666666;
  font-family: inherit;
  font-size: 13px;
  text-decoration: underline;
  cursor: pointer;
}

.game-area {
  width: 100%;
  max-width: 600px;
  height: 320px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  background: #e53935;
  user-select: none;
  -webkit-tap-highlight-color: transparent;
}

.game-area.state-click {
  background: #43a047;
}

.game-message {
  color: #ffffff;
  font-size: 28px;
  font-weight: 700;
  letter-spacing: 1px;
  text-align: center;
  padding: 16px;
}

.result-title {
  font-size: 36px;
  font-weight: 700;
  color: #1e88e5;
  margin-bottom: 8px;
}

.result-title.early {
  color: #e53935;
}

.stats {
  margin: 20px 0;
  color: #111111;
  font-size: 15px;
  line-height: 1.8;
}

.site-footer {
  text-align: center;
  padding: 20px 16px;
  color: #666666;
  font-size: 13px;
  border-top: 1px solid #eeeeee;
}

.footer-nav {
  margin-bottom: 8px;
}

.footer-nav a {
  color: #666666;
  text-decoration: underline;
  margin: 0 8px;
}

@media (max-width: 480px) {
  .game-area {
    height: 260px;
  }

  .game-message {
    font-size: 22px;
  }

  .result-title {
    font-size: 30px;
  }
}