* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Hiragino Sans", "Yu Gothic", sans-serif;
  background: #fff7fb;
  color: #333;
  text-align: center;
}

main {
  width: 100%;
  max-width: 720px;
  margin: 0 auto;
  padding-bottom: 40px;
}

.top-image {
  position: relative;
  width: 100%;
}

.top-image img {
  width: 100%;
  height: auto;
  display: block;
}

.countdown-section {
  padding: 24px 20px 6px;
  background: linear-gradient(180deg, #050505 0%, #1a0008 100%);
}

.countdown-title {
  margin: 0 0 14px;
  color: #fff;
  font-size: 20px;
  letter-spacing: 0;
}

.countdown-term {
  margin: 0 0 10px;
  color: #ffd6e8;
  font-size: 13px;
  font-weight: bold;
}

.countdown-box {
  display: block;
  width: 100%;
  max-width: 420px;
  margin: 0 auto 10px;
  padding: 18px 14px;
  background: linear-gradient(135deg, #111, #8b0000);
  color: #fff;
  border: 2px solid #ff4fa3;
  border-radius: 20px;
  font-size: clamp(20px, 6vw, 28px);
  font-weight: bold;
  line-height: 1.45;
  box-shadow: 0 0 25px rgba(255, 79, 163, 0.45);
}

.button {
  display: block;
  width: calc(100% - 40px);
  max-width: 420px;
  margin: 18px auto;
  padding: 16px 20px;
  border-radius: 999px;
  text-decoration: none;
  font-weight: bold;
  font-size: 18px;
  color: white;
  background: #ff4fa3;
  box-shadow: 0 6px 14px rgba(255, 79, 163, 0.25);
}

.button.sub {
  background: #20b486;
  box-shadow: 0 6px 14px rgba(32, 180, 134, 0.25);
}

.text {
  padding: 0 20px;
  line-height: 1.8;
  font-size: 15px;
}

.small {
  font-size: 13px;
  color: #666;
  padding: 0 20px;
  line-height: 1.7;
}