body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  line-height: 1.6;
  color: #333;
  background-image: url('../img/bg1.jpg');
  background-size: cover;
  background-position: center;
  background-attachment: fixed;
  margin: 0;
  padding: 20px;
}

#app {
  max-width: 800px;
  margin: 0 auto;
  background-color: rgba(255, 255, 255, 0.9);
  padding: 20px 40px;
  border-radius: 8px;
  box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

h1, h2, h3 {
  color: #111;
}

h1 {
    font-size: 2.5em;
    margin-bottom: 0.5em;
}

h2 {
    font-size: 2em;
    border-bottom: 2px solid #eee;
    padding-bottom: 0.3em;
    margin-top: 1.5em;
}

a {
  color: #007bff;
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

.social-links a {
  margin-right: 15px;
  font-size: 1.5em;
  text-decoration: none;
}

.social-links a:hover {
    opacity: 0.7;
}

.speaking-list {
  list-style: none;
  padding-left: 0;
}

.speaking-list li {
  padding: 8px 0;
  border-bottom: 1px solid #eee;
}

@media (max-width: 600px) {
  body {
    padding: 10px;
  }
  #app {
    padding: 20px;
  }
  h1 {
      font-size: 2em;
  }
  h2 {
      font-size: 1.75em;
  }
}