body {
  margin: 0;
  font-family: "Arial", "Hiragino Kaku Gothic ProN", sans-serif;
  background: #fff;
  text-align: center;
}

.header {
  padding: 10px;
  background-color: #fff;
  border-bottom: 12px solid #f29200;
  margin-bottom: 20px;
}

.header img {
  height: 30px;
}

.main-visual img {
  width: 100%;
  max-width: 900px;
  height: auto;
}

.kekka-visual img {
  width: 100%;
  max-width: 700px;
  height: auto;
}

.description {
  color: #5e5147;
  text-align: center;
  font-size: 16px;
  line-height: 1.8;
  margin: 40px auto;
  max-width: 600px;
}

.description p {
  margin: 0;
}

.description .section-title {
  font-weight: bold;
  font-size: 18px;
}

.description .sub-title {
  font-size: 18px;
  margin: 20px 0 0;
  font-weight: bold;
}

.description .period {
  font-weight: bold;
  margin-top: 24px;
}

.description .note {
  font-size: 14px;
  color: #666;
  margin-top: 0;
}

.description a {
  color: #0077cc;
  text-decoration: underline;
}

.button-area {
  margin: 30px 0;
}

.roulette-button {
  background-color: #f29200;
  color: white;
  font-size: 18px;
  padding: 15px 20px;
  width: 90%;
  max-width: 500px;
  border-radius: 30px;
  box-shadow: 0 4px 8px rgba(0,0,0,0.2);
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  transition: background-color 0.3s;
  flex-wrap: nowrap;
}

.roulette-button:hover {
  background-color: #e06900;
}

.roulette-button img {
  height: 24px;
}

.footer {
  padding: 20px 0;
  border-top: 12px solid #f29200;
  font-size: 12px;
  color: #777;
}

.footer a {
  color: #777;
  text-decoration: none;
  margin: 0 8px;
}

.footer a:hover {
  text-decoration: underline;
}

.roulette-gif {
  max-width: 90%;
  width: 800px;
  height: auto;
}

/* レスポンシブ対応 */
@media (max-width: 480px) {
  .header img {
    height: 24px;
  }

  .kekka-visual img {
    width: 85%;
  }

  .roulette-button {
    width: 70%;
    font-size: 16px;
    padding: 12px 16px;
  }

  .roulette-button img {
    height: 20px;
  }

  .footer {
    font-size: 10px;
  }
}