* {
box-sizing: border-box;
margin: 0;
padding: 0;
font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}


body {
min-height: 100vh;
background: linear-gradient(135deg, #667eea, #764ba2);
display: flex;
align-items: center;
justify-content: center;
color: #333;
}


.card {
background: white;
padding: 2.5rem;
border-radius: 16px;
width: 100%;
max-width: 420px;
text-align: center;
box-shadow: 0 20px 40px rgba(0, 0, 0, 0.15);
}


h1 {
margin-bottom: 1rem;
font-size: 2rem;
}


p {
margin-bottom: 2rem;
color: #555;
line-height: 1.5;
}


button {
background: #667eea;
color: white;
border: none;
padding: 0.75rem 1.5rem;
border-radius: 999px;
font-size: 1rem;
cursor: pointer;
transition: transform 0.15s ease, box-shadow 0.15s ease;
}


button:hover {
transform: translateY(-2px);
box-shadow: 0 8px 20px rgba(102, 126, 234, 0.4);
}


footer {
margin-top: 2rem;
font-size: 0.85rem;
color: #888;
}