/* ルールページ専用スタイル */
.rule-hero {
  background: linear-gradient(
    135deg,
    var(--light-blue) 0%,
    var(--primary-blue) 100%
  );
  color: var(--white);
  padding: 120px 0 80px;
  text-align: center;
}

.rule-hero h1 {
  font-size: 48px;
  font-weight: 900;
  margin-bottom: 20px;
}

.rule-hero p {
  font-size: 20px;
  opacity: 0.9;
}

.rule-nav {
  background-color: var(--white);
  padding: 20px 0;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
  position: sticky;
  top: 70px;
  z-index: 100;
}

.rule-nav ul {
  display: flex;
  justify-content: center;
  list-style: none;
  gap: 30px;
  flex-wrap: wrap;
}

.rule-nav a {
  color: var(--primary-blue);
  text-decoration: none;
  font-weight: 600;
  padding: 10px 20px;
  border-radius: 25px;
  transition: all 0.3s ease;
}

.rule-nav a:hover {
  background-color: var(--primary-blue);
  color: var(--white);
}

.rule-section {
  padding: 60px 0;
}

.rule-section:nth-child(even) {
  background-color: var(--white);
}

.rule-section:nth-child(odd) {
  background-color: var(--light-green);
}

.course-image-placeholder {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 30px auto;
}

.course-image-placeholder img {
  max-width: 100%;
  height: auto;
  display: block;
}

.points-table {
  width: 100%;
  max-width: 800px;
  margin: 30px auto;
  border-collapse: collapse;
  background-color: var(--white);
  border-radius: 10px;
  overflow: hidden;
  box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
}

.points-table th {
  background: linear-gradient(135deg, var(--primary-blue), var(--light-blue));
  color: var(--white);
  padding: 20px;
  font-weight: 700;
  text-align: left;
}

.points-table td {
  padding: 15px 20px;
  border-bottom: 1px solid #eee;
}

.points-table tr:last-child td {
  border-bottom: none;
}

.points-table tr:nth-child(even) {
  background-color: var(--light-green);
}

.points {
  font-weight: 700;
  font-size: 20px;
  color: var(--primary-blue);
  text-align: center;
}

.rule-content {
  max-width: 900px;
  margin: 0 auto;
}

.rule-content h3 {
  color: var(--primary-blue);
  font-size: 24px;
  font-weight: 700;
  margin-bottom: 20px;
  padding-bottom: 10px;
  border-bottom: 3px solid var(--light-blue);
}

.rule-content h4 {
  color: var(--primary-blue);
  font-size: 20px;
  font-weight: 700;
}

.rule-content p {
  margin-bottom: 15px;
  line-height: 1.8;
}

.rule-content ul {
  margin: 20px 0;
  padding-left: 20px;
}

.rule-content li {
  margin-bottom: 10px;
  line-height: 1.7;
}

.highlight-box {
  background-color: var(--light-blue);
  color: var(--white);
  padding: 20px;
  border-radius: 10px;
  margin: 20px 0;
  font-weight: 600;
}

.warning-box {
  background-color: #ff6b6b;
  color: var(--white);
  padding: 20px;
  border-radius: 10px;
  margin: 20px 0;
  font-weight: 600;
}

.info-box {
  padding: 20px;
  border: solid 2px #ffc107;
  border-radius: 10px;
  margin: 20px 0;
}

.back-button {
  display: inline-block;
  background: linear-gradient(135deg, var(--primary-blue), var(--light-blue));
  color: var(--white);
  padding: 15px 30px;
  border-radius: 30px;
  text-decoration: none;
  font-weight: 700;
  margin: 40px 0;
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.back-button:hover {
  transform: translateY(-3px);
  box-shadow: 0 10px 20px rgba(51, 150, 206, 0.3);
}

@media (max-width: 768px) {
  .rule-hero h1 {
    font-size: 32px;
  }

  .rule-hero p {
    font-size: 16px;
  }

  .rule-nav ul {
    gap: 15px;
  }

  .rule-nav a {
    padding: 8px 15px;
    font-size: 14px;
  }

  .points-table th,
  .points-table td {
    padding: 12px 15px;
  }
}