html {
  scroll-behavior: smooth;
}

body {
  background-color: lightgray;
  color: black;
  font-family: Arial, sans-serif;
  max-width: 900px;
  margin: 0 auto;
  padding: 20px 10px;
}

h1 {
  text-align: center;
}

header {
  margin-bottom: 30px;
  text-align: center;
}

nav {
  margin-top: 15px;
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 10px;
}

section {
  border: 3px solid black;
  padding: 20px;
  margin: 20px 0;
  background-color: white;
  box-shadow: 4px 4px 0px black;
}

a {
  color: blue;
  margin-right: 15px;
  text-decoration: none;
  font-weight: bold;
}

a:hover {
  color: red;
  background-color: yellow;
}

.skills-list {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  list-style-type: none;
  padding-left: 0;
}

.skills-list li {
  border: 2px solid black;
  background-color: lightyellow;
  padding: 5px 12px;
  font-weight: bold;
}

.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 15px;
  margin-top: 15px;
}

.project-card {
  border: 2px solid black;
  padding: 15px;
  background-color: #f9f9f9;
}

.cat-image {
  max-width: 250px;
  width: 100%;
  height: auto;
  border: 2px solid black;
  margin-top: 10px;
  display: block;
}

footer {
  text-align: center;
  margin-top: 40px;
  font-size: 0.9em;
}