* { margin: 0; padding: 0; box-sizing: border-box; }
body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 20px;
}
.container {
    background: white;
    border-radius: 20px;
    padding: 40px;
    max-width: 500px;
    width: 100%;
    box-shadow: 0 20px 60px rgba(0,0,0,0.3);
}
h1 { color: #333; margin-bottom: 10px; }
.event-details { color: #666; margin-bottom: 30px; padding-bottom: 20px; border-bottom: 1px solid #eee; }
.event-details p { margin: 5px 0; }
.greeting { font-size: 1.2em; color: #667eea; margin-bottom: 30px; }
.form-group { margin-bottom: 25px; }
label { display: block; margin-bottom: 10px; font-weight: 600; color: #333; }
.radio-group { display: flex; gap: 20px; }
.radio-group label { display: flex; align-items: center; gap: 8px; font-weight: normal; cursor: pointer; }
input[type="number"] {
    width: 100%;
    padding: 12px;
    border: 2px solid #e0e0e0;
    border-radius: 10px;
    font-size: 16px;
    transition: border-color 0.3s;
}
input[type="number"]:focus {
    outline: none;
    border-color: #667eea;
}
button {
    width: 100%;
    padding: 14px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    border: none;
    border-radius: 10px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: transform 0.2s;
}
button:hover { transform: translateY(-2px); }
button:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none;
}
.message {
    padding: 12px;
    border-radius: 10px;
    margin-bottom: 20px;
}
.message.success { background: #d4edda; color: #155724; border: 1px solid #c3e6cb; }
.message.error { background: #f8d7da; color: #721c24; border: 1px solid #f5c6cb; }
.message.info { background: #d1ecf1; color: #0c5460; border: 1px solid #bee5eb; }
.deadline-note {
    margin-top: 20px;
    padding: 10px;
    background: #f8f9fa;
    border-radius: 10px;
    font-size: 0.9em;
    color: #666;
    text-align: center;
}
.response-status {
    text-align: center;
    padding: 20px;
    background: #f8f9fa;
    border-radius: 10px;
    margin-top: 20px;
}