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

body {
  font-family: 'Georgia', serif;
  background: url('https://images.unsplash.com/photo-1511795409834-ef04bbd61622?ixlib=rb-1.2.1&auto=format&fit=crop&w=1350&q=80') no-repeat center center fixed;
  background-size: cover;
  color: #333;
  line-height: 1.6;
}

.container {
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 100vh;
  padding: 20px;
}

.invitation-card {
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(10px);
  border-radius: 16px;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
  padding: 40px;
  width: 100%;
  max-width: 500px;
  text-align: center;
  border: 1px solid #e0e0e0;
}

h1 {
  color: #8e44ad;
  margin-bottom: 10px;
  font-size: 2.2em;
}

p {
  color: #666;
  margin-bottom: 30px;
  font-style: italic;
}

.form-group {
  margin-bottom: 20px;
  text-align: left;
}

label {
  display: block;
  margin-bottom: 8px;
  color: #555;
  font-weight: bold;
}

input {
  width: 100%;
  padding: 12px;
  border: 2px solid #ddd;
  border-radius: 8px;
  font-size: 16px;
  transition: border 0.3s;
}

input:focus {
  border-color: #9b59b6;
  outline: none;
}

button {
  background: #9b59b6;
  color: white;
  padding: 14px 30px;
  border: none;
  border-radius: 8px;
  font-size: 18px;
  cursor: pointer;
  width: 100%;
  transition: background 0.3s;
}

button:hover {
  background: #8e44ad;
}

.error {
  color: #e74c3c;
  font-size: 14px;
  display: block;
  margin-top: 5px;
}