body {
  margin: 0;
  font-family: 'Arial', sans-serif;
  background-color: #0d0d0d;
  color: #f5f5f5;
  text-align: center;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  min-height: 100vh;
}
.invitation {
  background-color: #1a1a1a;
  border: 2px solid #c0a772;
  padding: 2rem;
  border-radius: 12px;
  box-shadow: 0 0 15px rgba(0,0,0,0.5);
  max-width: 600px;
}
.invitation h1 {
  font-size: 2.5rem;
  margin-bottom: 0.5rem;
  color: #c0a772;
}
.invitation p {
  margin: 0.5rem 0;
  font-size: 1.2rem;
}
.invitation a {
  display: inline-block;
  margin-top: 1rem;
  color: #6ea0a4;
  text-decoration: none;
  font-weight: bold;
  border: 1px solid #6ea0a4;
  padding: 0.5rem 1rem;
  border-radius: 8px;
  transition: background-color 0.3s, color 0.3s;
}
.invitation a:hover {
  background-color: #6ea0a4;
  color: #0d0d0d;
}
button {
  margin-top: 1rem;
  padding: 0.5rem 1rem;
  border: none;
  border-radius: 8px;
  background-color: #c0a772;
  color: #0d0d0d;
  font-size: 1rem;
  cursor: pointer;
}
button:hover {
  background-color: #d8b678;
}
#calendar-link {
  margin-top: 1rem;
  display: inline-block;
  color: #6ea0a4;
}