body {
  font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
  background-color: #f0f4f8;
  margin: 0;
  padding: 0;
  color: #333;
}

/* Container to center content with fixed max-width */
.main-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 20px;
}

header {
  background-color: #34495e;
  color: #fff;
  padding: 30px 20px;
  text-align: center;
}
header h1 {
  margin: 0;
  font-size: 2em;
}

/* Introduction section styles */
.intro-section {
  background: #fff;
  border-radius: 10px;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
  padding: 20px;
  margin-bottom: 30px;
}
.intro-section h2 {
  text-align: center;
  color: #2c3e50;
  margin-bottom: 20px;
}
.intro-section p {
  font-size: 1.1em;
  line-height: 1.6;
  margin-bottom: 20px;
}

/* Skills & categories grid styles */
section {
  max-width: 1200px;
  margin: 0 auto 30px auto;
}

section h2 {
  text-align: center;
  margin-bottom: 20px;
  color: #2c3e50;
}

.grid-container {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 20px;
}

.category {
  background: #ecf0f1;
  padding: 15px;
  border-radius: 8px;
  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.1);
}
.category h3 {
  display: flex;
  align-items: center;
  font-size: 1.2em;
  margin-bottom: 12px;
  color: #2c3e50;
}
.category h3 i {
  margin-right: 8px;
  color: #16a085;
}
ul {
  list-style: none;
  padding-left: 0;
}
li {
  background: #fff;
  margin: 6px 0;
  padding: 8px 12px;
  border-radius: 6px;
  display: flex;
  align-items: center;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.05);
}
li i {
  margin-right: 10px;
  color: #3498db;
}

/* Responsive design */
@media (max-width: 768px) {
  body {
    padding: 10px;
  }
}