body {
  background-color: #0d1117;
  color: #c9d1d9;
  font-family: 'Segoe UI', 'Liberation Sans', Arial, sans-serif;
  margin: 0;
  padding: 0;
}

header, footer {
  background: #161b22;
  color: #c9d1d9;
  padding: 2rem 0;
  text-align: center;
}

nav {
  background: #161b22;
  border-bottom: 1px solid #21262d;
  padding: 1rem 0;
}
nav .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
}
nav a {
  color: #c9d1d9;
  text-decoration: none;
  margin: 0 1rem;
  font-weight: 600;
}
nav a:hover {
  color: #58a6ff;
}

.container {
  max-width: 900px;
  margin: 0 auto;
  padding: 2rem 1rem;
}

h1, h2, h3, h4 {
  color: #58a6ff;
  margin-top: 0;
}

.section {
  background: #161b22;
  border-radius: 8px;
  margin-bottom: 2rem;
  padding: 2rem;
  box-shadow: 0 2px 8px #01040933;
}

ul.skills {
  list-style: none;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
}
ul.skills li {
  background: #21262d;
  color: #c9d1d9;
  padding: 0.5rem 1rem;
  border-radius: 6px;
  font-size: 1rem;
}

footer {
  font-size: 0.95rem;
  border-top: 1px solid #21262d;
}

@media (max-width: 600px) {
  .container {
    padding: 1rem 0.5rem;
  }
  nav .container {
    flex-direction: column;
    gap: 1rem;
  }
  ul.skills {
    flex-direction: column;
    gap: 0.5rem;
  }
}