/* Reset & Base */
* { margin: 0; padding: 0; box-sizing: border-box; }
body {
  font-family: 'Segoe UI', sans-serif;
  line-height: 1.6;
  background: #f9f9f9;
  color: #333;
  transition: background 0.3s, color 0.3s;
}
a { color: #007bff; text-decoration: none; }

/* Navbar */
nav {
  display: flex; justify-content: space-between; align-items: center;
  padding: 1rem 2rem; background: #007bff; color: white;
}
nav .nav-links { list-style: none; display: flex; gap: 1rem; }
nav .nav-links a { color: white; font-weight: bold; }
.theme-toggle { background: none; border: none; font-size: 1.2rem; cursor: pointer; }

/* Hero */
.hero { text-align: center; padding: 4rem 2rem; background: #e9f2ff; }
.hero .highlight { color: #007bff; }
.btn {
  display: inline-block; margin-top: 1rem;
  padding: 0.5rem 1.2rem; background: #007bff; color: white; border-radius: 5px;
}

/* Sections */
section { padding: 3rem 2rem; }
h2 { margin-bottom: 1rem; color: #007bff; }

/* Skills */
.skills-grid {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
  gap: 1rem; text-align: center;
}
.skills-grid div {
  background: #fff; padding: 1rem; border-radius: 8px; box-shadow: 0 2px 5px rgba(0,0,0,0.1);
}

/* Projects */
.project-card {
  background: #fff; padding: 1.5rem; margin: 1rem 0;
  border-radius: 8px; box-shadow: 0 2px 5px rgba(0,0,0,0.1);
}

/* Footer */
footer { text-align: center; padding: 1rem; background: #007bff; color: white; }

/* Dark Mode */
.dark {
  background: #121212; color: #e0e0e0;
}
.dark nav { background: #222; }
.dark .btn { background: #444; }
.dark a { color: #66b2ff; }
.dark footer { background: #222; }