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

body {
  font-family: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background-color: #ffffff;
  color: #111111;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  padding: 40px 20px;
}

main {
  max-width: 650px;
  width: 100%;
  text-align: left;
}

.profile-row {
  display: flex;
  align-items: center;
  justify-content: flex-start;
  gap: 20px;
  margin-bottom: 1.8rem;
}

.profile {
  width: 120px;
  height: 120px;
  border-radius: 50%;
  object-fit: cover;
}

.pitt-logo {
  width: 120px;
  height: auto;
  opacity: 0.85;
  filter: grayscale(20%);
  transition: all 0.3s ease;
}

.pitt-logo:hover {
  opacity: 1;
  filter: grayscale(0%);
}

h1 {
  font-size: 1.9rem;
  font-weight: 600;
  margin-bottom: 1rem;
}

.bio {
  font-size: 1rem;
  color: #333333;
  line-height: 1.6;
  margin-bottom: 1.6rem;
}

a {
  color: #0070f3;
  text-decoration: none;
  transition: color 0.2s ease;
}

a:hover {
  text-decoration: underline;
  color: #005ad0;
}

.links {
  margin-bottom: 1.5rem;
}

.nav-link {
  font-weight: 500;
  font-size: 1.05rem;
}

/* socials */
.socials {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-top: 1rem;
  font-size: 1rem;
}

.socials a {
  color: #111111;
}

footer {
  margin-top: 4rem;
  font-size: 0.85rem;
  color: #666666;
  text-align: center;
}

.cert-strip {
  display: flex;
  align-items: center;
  gap: 10px;
}

.cert-badge {
  width: 60px;
  height: auto;
}

.cert-arrow {
  font-size: 1.8rem;
  color: #0070f3;
}

.cert-badge.upcoming {
  opacity: 0.4;
  filter: grayscale(100%);
}

@media (max-width: 600px) {
  .profile-row {
    flex-direction: row;
    gap: 12px;
  }

  .profile {
    width: 90px;
    height: 90px;
  }

  .pitt-logo {
    width: 65px;
  }

  h1 {
    font-size: 1.6rem;
  }

  .bio {
    font-size: 0.95rem;
  }

  .cert-badge {
    width: 50px;
  }
}

.pitt-row {
  display: flex;
  align-items: center;
  gap: 10px;
}