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

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

.card {
    background: #ffffff;
    padding: 2.5rem 3rem;
    border-radius: 16px;
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.2);
    text-align: center;
    max-width: 420px;
    width: 90%;
}

.card h1 {
    color: #764ba2;
    margin-bottom: 0.75rem;
    font-size: 2.2rem;
}

.card p {
    color: #666;
    margin-bottom: 1.5rem;
    font-size: 1rem;
    line-height: 1.5;
}

button {
    background-color: #667eea;
    color: white;
    border: none;
    padding: 12px 24px;
    font-size: 1rem;
    font-weight: 600;
    border-radius: 8px;
    cursor: pointer;
    transition: background-color 0.2s ease, transform 0.1s ease;
}

button:hover {
    background-color: #5a67d8;
}

button:active {
    transform: scale(0.98);
}