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

body {
  font-family: 'Segoe UI', sans-serif;
  background-color: #0b0c10;
  color: #ffffff;
  line-height: 1.6;
  overflow-x: hidden;
}

header {
  background-color: #1f2833;
  padding: 0.5rem;
  text-align: center;
  color: #338cff;
  border-bottom: 3px solid #1f2833;
  box-shadow: 0 0 15px #303030;
  transition: all 0.3s ease-in-out;
}

header:hover {
  box-shadow: 0 0 20px #181818;
}

h1 {
  font-size: 1.8rem;
}

.container {
  max-width: 1100px;
  margin: 40px auto;
  padding: 30px;
  background-color: #1f2833;
  border-radius: 20px;
  transition: 0.3s ease;
}

.category {
  margin-bottom: 50px;
  transition: transform 0.3s ease;
}

.category h2 {
  font-size: 1.8rem;
  color: #338cff;
  margin-bottom: 15px;
  padding-bottom: 5px;
  border-bottom: 2px solid #006eff;
}

.rule-group {
  margin-bottom: 25px;
  padding-left: 10px;
  border-left: 3px solid #006eff;
  transition: all 0.2s ease;
}

.rule-group:hover {
  border-left: 3px solid #ffffff;
}

.rule-group h3 {
  font-size: 1.3rem;
  margin-bottom: 8px;
  color: #ffffff;
}

.rule-group p {
  color: #c5c6c7;
  margin-left: 10px;
  transition: color 0.2s ease;
}

.rule-group:hover p {
  color: #ffffff;
}

@media (max-width: 768px) {
  header h1 {
    font-size: 2rem;
  }

  .container {
    padding: 15px;
  }

  .category h2 {
    font-size: 1.5rem;
  }

  .rule-group h3 {
    font-size: 1.1rem;
  }
}