body {
    font-family: 'Segoe UI', sans-serif;
    background: #0d1117;
    color: #c9d1d9;
    margin: 0;
    padding: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
}

.invitation-container {
    background: #161b22;
    padding: 40px;
    max-width: 550px;
    text-align: center;
    border-radius: 12px;
    box-shadow: 0 0 20px rgba(0, 255, 200, 0.2);
    border: 1px solid #30363d;
}

h1 {
    color: #58a6ff;
    font-size: 2.5em;
    margin-bottom: 10px;
}

.event-name {
    font-size: 1.5em;
    margin-bottom: 20px;
    color: #00ffaa;
}

.event-details p {
    margin: 10px 0;
    line-height: 1.5;
}

.rsvp {
    margin-top: 20px;
    font-weight: bold;
    color: #ff7b72;
}

.rsvp-button {
    display: inline-block;
    margin-top: 10px;
    background: #238636;
    color: white;
    padding: 10px 25px;
    text-decoration: none;
    border-radius: 6px;
    transition: background 0.3s ease;
}

.rsvp-button:hover {
    background: #2ea043;
}

footer {
    margin-top: 30px;
    font-style: italic;
    font-size: 0.9em;
    color: #8b949e;
}
