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

body {
  font-family: "Arial", sans-serif;
  background: #f5f5f5;
  color: #333;
  line-height: 1.6;
  animation: fadeIn 0.5s ease-in-out forwards;
}

@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

.container {
  max-width: 1000px;
  margin: 30px auto;
  padding: 10px;
  background: white;
  border-radius: 20px;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
}

.header {
  background-color: #2f5fa6;
  padding: 10px;
  border-radius: 15px;
  color: white;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
}

.logo-block {
  display: flex;
  align-items: center;
  gap: 15px;
}

.logo-block img {
  width: 80px;
  height: auto;
}

.site-title {
  font-size: 24px;
  font-weight: bold;
}

.nav {
  display: flex;
  flex-wrap: wrap;
  gap: 15px;
}

.nav a {
  color: white;
  text-decoration: none;
  font-weight: 500;
}

.exit-btn {
  background-color: white;
  color: #2f5fa6;
  border: none;
  padding: 6px 15px;
  border-radius: 20px;
  cursor: pointer;
  font-weight: bold;
}

.exit-btn:hover {
  background-color: #00c77934;
}

.content {
  margin-top: 30px;
}

.main-title {
  font-size: 32px;
  color: #2f5fa6;
  margin-bottom: 20px;
  text-align: center;
}

.intro {
  margin-bottom: 15px;
  font-size: 18px;
}

.game-block {
  background: #f9f9f9;
  border-left: 6px solid #2f5fa6;
  padding: 20px;
  border-radius: 12px;
  margin-bottom: 25px;
}

.game-block h2 {
  color: #2f5fa6;
  margin-bottom: 12px;
}

.game-block ul {
  padding-left: 20px;
}

.game-block li {
  margin-bottom: 10px;
}

.summary-box {
  background: #eef4ff;
  padding: 20px;
  border-left: 6px solid #2f5fa6;
  border-radius: 12px;
  font-size: 17px;
}

.summary-box ul {
  margin-top: 10px;
  padding-left: 20px;
}

@media (max-width: 600px) {
  .nav {
    flex-direction: column;
    gap: 10px;
  }

  .main-title {
    font-size: 26px;
  }

  .logo-block {
    justify-content: center;
  }

  .header {
    align-items: center;
  }
}