:root {
  --bg-color: #0f1115;
  --text-primary: #e2e8f0;
  --text-secondary: #94a3b8;
  --accent-color: #38bdf8;
  --border-color: #334155;
  --card-bg: #1e293b;
  --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

body {
  margin: 0;
  padding: 0;
  background-color: var(--bg-color);
  color: var(--text-primary);
  font-family: var(--font-family);
  line-height: 1.6;
}

.container {
  max-width: 800px;
  margin: 0 auto;
  padding: 2rem;
}

a {
  color: var(--accent-color);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

.header {
  margin-bottom: 3rem;
  padding-bottom: 2rem;
  border-bottom: 1px solid var(--border-color);
}

.profile-section {
  display: flex;
  align-items: center;
  gap: 2rem;
}

.profile-img {
  width: 120px;
  height: 120px;
  border-radius: 50%;
  object-fit: cover;
  border: 2px solid var(--border-color);
}

h1 {
  margin: 0 0 0.5rem 0;
  font-size: 2.2rem;
  color: #fff;
}

.subtitle {
  margin: 0 0 1rem 0;
  color: var(--text-secondary);
  font-size: 1.1rem;
}

.social-links {
  display: flex;
  gap: 1.25rem;
}

.social-links a {
  font-weight: 500;
}

.section {
  margin-bottom: 3.5rem;
}

h2 {
  font-size: 1.6rem;
  color: #fff;
  margin-bottom: 1.5rem;
  border-bottom: 1px solid var(--border-color);
  padding-bottom: 0.5rem;
}

h3 {
  font-size: 1.25rem;
  color: #fff;
  margin-bottom: 0.5rem;
  line-height: 1.4;
}

.interests-list {
  padding-left: 1.5rem;
}

.interests-list li {
  margin-bottom: 0.5rem;
}

.project-card {
  background-color: var(--card-bg);
  padding: 1.75rem;
  border-radius: 8px;
  border: 1px solid var(--border-color);
}

.project-meta {
  font-size: 0.95rem;
  color: var(--text-secondary);
  margin-top: -0.25rem;
  margin-bottom: 1.25rem;
}

.btn {
  display: inline-block;
  margin-top: 1rem;
  padding: 0.6rem 1.25rem;
  background-color: var(--border-color);
  color: #fff;
  border-radius: 4px;
  font-weight: 500;
  transition: background-color 0.2s;
}

.btn:hover {
  background-color: var(--accent-color);
  color: #0f1115;
  text-decoration: none;
}

.publication {
  margin-bottom: 2rem;
}

.publication p {
  margin: 0;
  color: var(--text-secondary);
}

.footer {
  margin-top: 4rem;
  padding-top: 2rem;
  border-top: 1px solid var(--border-color);
  text-align: center;
  color: var(--text-secondary);
  font-size: 0.9rem;
}

@media (max-width: 600px) {
  .profile-section {
    flex-direction: column;
    text-align: center;
  }
  .social-links {
    justify-content: center;
  }
}