/* --- Dark Theme Styles --- */
body {
  margin: 0;
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  line-height: 1.6;
  color: #e2e8f0;
  background: #0f172a; /* dark navy */
}

header {
  background: #1e293b;
  color: #38bdf8; /* accent color */
  padding: 3rem 0;
  text-align: center;
  border-bottom: 2px solid #38bdf8;
}

header h1 {
  margin: 0;
  font-size: 2.8rem;
}

header p {
  margin: 0.5rem 0 0;
  font-size: 1.2rem;
  color: #94a3b8;
}

nav {
  background: #0f172a;
  text-align: center;
  padding: 0.75rem 0;
  position: sticky;
  top: 0;
  border-bottom: 1px solid #334155;
  z-index: 100;
}

nav a {
  color: #e2e8f0;
  margin: 0 20px;
  text-decoration: none;
  font-weight: 600;
  transition: color 0.2s ease-in-out;
}

nav a:hover {
  color: #38bdf8;
}

section {
  max-width: 900px;
  margin: 3rem auto;
  padding: 0 1rem;
}

section h2 {
  margin-bottom: 1rem;
  color: #38bdf8;
  border-bottom: 2px solid #38bdf8;
  display: inline-block;
  padding-bottom: 0.25rem;
}

.projects {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 1.5rem;
}

.project-card {
  background: #1e293b;
  border-radius: 12px;
  padding: 1.5rem;
  box-shadow: 0 4px 12px rgba(0,0,0,0.5);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.project-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 6px 16px rgba(0,0,0,0.7);
}

.project-card h3 {
  margin-top: 0;
  color: #f8fafc;
}

footer {
  text-align: center;
  padding: 1rem;
  background: #1e293b;
  color: #94a3b8;
  margin-top: 3rem;
  border-top: 2px solid #38bdf8;
}