* {
    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-color: #f5f5f5;
}

header {
    background-color: #2c3e50;
    color: white;
    text-align: center;
    padding: 2rem 0;
}

main {
    max-width: 1200px;
    margin: 2rem auto;
    padding: 0 2rem;
}

.card {
    background-color: white;
    border-radius: 8px;
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.1);
    padding: 1.5rem;
    margin: 1.5rem 0;
}

.button {
    display: inline-block;
    background-color: #3498db;
    color: white;
    padding: 0.8rem 1.5rem;
    text-decoration: none;
    border-radius: 4px;
    transition: background-color 0.3s;
}

.button:hover {
    background-color: #2980b9;
}

footer {
    text-align: center;
    padding: 1.5rem 0;
    background-color: #2c3e50;
    color: white;
    margin-top: 2rem;
}