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

body {
  font-family: Arial, sans-serif;
  line-height: 1.6;
  background: #f4f4f9;
  color: #333;
}

header {
  background: #007bff;
  color: white;
  padding: 15px;
}

nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

nav ul {
  list-style: none;
  display: flex;
}

nav ul li {
  margin-left: 20px;
}

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

.hero {
  text-align: center;
  padding: 60px 20px;
  background: linear-gradient(to right, #007bff, #00c6ff);
  color: white;
}

.hero h2 span {
  color: yellow;
}

.hero .btn {
  display: inline-block;
  margin-top: 20px;
  padding: 10px 20px;
  background: white;
  color: #007bff;
  border-radius: 20px;
  text-decoration: none;
  font-weight: bold;
}

.section {
  padding: 50px 20px;
  text-align: center;
}

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

.card {
  background: white;
  padding: 20px;
  border-radius: 10px;
  box-shadow: 0px 4px 15px rgba(0,0,0,0.1);
}

.card a {
  display: inline-block;
  margin-top: 10px;
  color: #007bff;
  font-weight: bold;
  text-decoration: none;
}

footer {
  text-align: center;
  padding: 20px;
  margin-top: 30px;
  background: #222;
  color: white;
}

.dark-mode {
  background: #222;
  color: white;
}

.dark-mode header {
  background: #333;
}

.dark-mode .hero {
  background: linear-gradient(to right, #444, #111);
}

.dark-mode .card {
  background: #333;
  color: white;
}