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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    color: #333;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
}

.container {
    background: white;
    border-radius: 15px;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
    padding: 3rem;
    max-width: 600px;
    width: 90%;
    text-align: center;
    margin: 2rem;
}

header h1 {
    font-size: 3rem;
    color: #4a5568;
    margin-bottom: 2rem;
    font-weight: 300;
}

.intro {
    margin: 2rem 0;
}

.intro p {
    font-size: 1.2rem;
    margin-bottom: 1rem;
    color: #666;
}

.thanks {
    font-size: 1.4rem !important;
    color: #667eea !important;
    font-weight: 500;
    margin-top: 1.5rem !important;
}

footer {
    margin-top: 3rem;
    padding-top: 2rem;
    border-top: 1px solid #e2e8f0;
}

footer p {
    color: #a0aec0;
    font-size: 0.9rem;
}

@media (max-width: 768px) {
    .container {
        padding: 2rem;
        margin: 1rem;
    }
    
    header h1 {
        font-size: 2.5rem;
    }
    
    .intro p {
        font-size: 1.1rem;
    }
    
    .thanks {
        font-size: 1.3rem !important;
    }
}