body {
  font-family: 'Segoe UI', Arial, sans-serif;
  background: #f7fafd;
  margin: 0;
  color: #1a237e;
}

h1 {
  background: #005bbc;
  color: #fff;
  margin: 0;
  padding: 30px 0 16px 0;
  font-size: 2.1rem;
  letter-spacing: 0.5px;
  text-align: center;
  font-weight: 600;
}

p {
  text-align: center;
  font-size: 1.07rem;
  margin: 0 0 30px 0;
}

ul {
  list-style: none;
  padding: 0;
  max-width: 880px;
  margin: 18px auto 0 auto;
}

ul > li {
  margin-bottom: 34px;
  background: #fff;
  border-radius: 8px;
  box-shadow: 0 2px 10px rgba(100,120,180,0.08);
  padding: 20px 28px 18px 28px;
}

ul > li > strong {
  font-size: 1.22rem;
  color: #005bbc;
}

ul ul {
  margin: 7px 0 0 20px;
  padding-left: 0;
}

ul ul li {
  margin: 0 0 8px 0;
  padding: 0;
  background: none;
  box-shadow: none;
}

a {
  color: #1976d2;
  text-decoration: none;
  transition: color 0.16s;
}

a:hover {
  color: #004ba0;
  text-decoration: underline;
}

em {
  display: block;
  text-align: center;
  color: #555;
  font-size: 1rem;
  margin-top: 34px;
}

@media (max-width: 700px) {
  ul, ul > li {
    max-width: 98vw;
    padding: 10px 7vw 10px 7vw;
  }
  h1 {
    font-size: 1.2rem;
    padding: 18px 0 8px 0;
  }
}

.github-link {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 9px;
  margin-top: 8px;
  margin-bottom: 12px;
  font-size: 1.1rem;
}

.github-link a {
  display: inline-flex;
  align-items: center;
  color: #222;
  text-decoration: none;
  font-weight: 600;
  transition: color 0.18s;
}

.github-link a:hover {
  color: #1976d2;
  text-decoration: underline;
}

.github-icon {
  width: 23px;
  height: 23px;
  margin-right: 7px;
  vertical-align: middle;
}