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

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background-color: #0d1117;
  color: #c9d1d9;
  line-height: 1.6;
}

header {
  position: sticky;
  top: 0;
  background-color: rgba(13, 17, 23, 0.95);
  border-bottom: 1px solid #30363d;
  padding: 1rem 0;
  z-index: 100;
}

.header-container {
  max-width: 850px;
  margin: 0 auto;
  padding: 0 20px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo {
  color: #58a6ff;
  font-family: "Courier New", monospace;
  font-weight: bold;
  font-size: 1.1rem;
}

nav a {
  color: #8b949e;
  text-decoration: none;
  margin-left: 20px;
  font-weight: 500;
  transition: color 0.2s ease;
}

nav a:hover {
  color: #58a6ff;
}

.content-wrapper {
  max-width: 850px;
  margin: 0 auto;
  padding: 40px 20px;
}

section { margin-bottom: 50px; }
h1 { color: #f0f6fc; font-size: 2.2rem; }
h2 { color: #58a6ff; border-bottom: 1px solid #21262d; padding-bottom: 6px; margin-bottom: 16px; }
h3 { color: #f0f6fc; margin-bottom: 4px; }
.subtitle { color: #8b949e; font-size: 1.15rem; margin-bottom: 15px; }

.card {
  background-color: #161b22;
  border: 1px solid #30363d;
  border-radius: 8px;
  padding: 20px;
}

.project-grid {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.project-card {
  transition: transform 0.15s ease, border-color 0.15s ease;
}

.project-card:hover {
  border-color: #58a6ff;
  transform: translateY(-2px);
}

.project-meta {
  color: #79c0ff;
  font-family: monospace;
  font-size: 0.85rem;
  margin-bottom: 8px;
}

ul {
  list-style: none;
}

ul li {
  padding: 6px 0;
  border-bottom: 1px solid #21262d;
}

ul li:last-child { border-bottom: none; }
ul li strong { color: #f0f6fc; }

.contact-links {
  margin-top: 15px;
  display: flex;
  gap: 12px;
}

.btn {
  background-color: #21262d;
  color: #c9d1d9;
  padding: 8px 16px;
  border: 1px solid #30363d;
  border-radius: 6px;
  text-decoration: none;
  transition: all 0.2s ease;
}

.btn:hover {
  background-color: #30363d;
  color: #58a6ff;
  border-color: #8b949e;
}

footer {
  text-align: center;
  color: #6e7681;
  padding: 20px;
  font-size: 0.85rem;
}