* { margin: 0; padding: 0; box-sizing: border-box; font-family: Arial, sans-serif; }

body {
    background-color: #f4f4f9;
    color: #333;
    display: flex;
    flex-direction: column;
    min-height: 100vh;  
}

header {
    background-color: #004d40;  
    color: white;
    padding: 1rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

header nav ul {
    list-style: none;
    display: flex;
    gap: 20px;
}

header a { color: white; text-decoration: none; font-weight: bold; }

main {
    flex: 1;
    padding: 2rem;
    text-align: center;
}

footer {
    background-color: #333;
    color: white;
    text-align: center;
    padding: 1rem;
    margin-top: auto;
}