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

body {
  font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
  line-height: 1.7;
  color: #333;
  background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
  padding: 20px;
}

.container {
  max-width: 900px;
  margin: 0 auto;
  background: white;
  padding: 50px;
  border-radius: 15px;
  box-shadow: 0 10px 40px rgba(0, 0, 0, 0.1);
}

h1 {
  color: #2c3e50;
  font-size: 2.5em;
  margin-bottom: 15px;
  border-bottom: 4px solid #3498db;
  padding-bottom: 15px;
}

h2 {
  color: #34495e;
  font-size: 1.8em;
  margin-top: 40px;
  margin-bottom: 20px;
  padding-left: 15px;
  border-left: 5px solid #3498db;
}

h3 {
  color: #555;
  font-size: 1.4em;
  margin-top: 30px;
  margin-bottom: 15px;
}

h4 {
  color: #666;
  font-size: 1.2em;
  margin-top: 25px;
  margin-bottom: 12px;
  font-weight: 600;
}

p {
  margin-bottom: 15px;
  text-align: justify;
}

.last-updated {
  color: #7f8c8d;
  font-style: italic;
  font-size: 0.95em;
  margin-bottom: 30px;
}

ul {
  margin: 20px 0;
  padding-left: 40px;
}

li {
  margin-bottom: 12px;
}

li p {
  margin-bottom: 8px;
}

strong {
  color: #2c3e50;
  font-weight: 600;
}

a {
  color: #3498db;
  text-decoration: none;
  transition: color 0.3s ease;
}

a:hover {
  color: #2980b9;
  text-decoration: underline;
}

.contact-section {
  background: #f8f9fa;
  padding: 25px;
  border-radius: 10px;
  margin-top: 30px;
  border-left: 5px solid #3498db;
}

.contact-section ul {
  list-style: none;
  padding-left: 0;
}

.contact-section li {
  padding: 8px 0;
  display: flex;
  align-items: center;
}

.contact-section li::before {
  content: "→";
  color: #3498db;
  font-weight: bold;
  margin-right: 10px;
}

@media (max-width: 768px) {
  .container {
    padding: 30px 20px;
  }

  h1 {
    font-size: 2em;
  }

  h2 {
    font-size: 1.5em;
  }

  h3 {
    font-size: 1.2em;
  }

  ul {
    padding-left: 25px;
  }
}

.highlight-box {
  background: #e8f4f8;
  padding: 20px;
  border-radius: 8px;
  margin: 20px 0;
  border-left: 4px solid #3498db;
}

.definition-list li {
  background: #f8f9fa;
  padding: 15px;
  margin-bottom: 10px;
  border-radius: 5px;
  transition: transform 0.2s ease;
}

.definition-list li:hover {
  transform: translateX(5px);
  background: #e9ecef;
}