* {
    box-sizing: border-box;
}

html {
    font-size: 15px;
}

body {
    font-family:
        "Inter",
        system-ui,
        -apple-system,
        Roboto,
        "Segoe UI",
        Arial,
        sans-serif;
    padding: 20px;
    margin: 0;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    background-color: #fff;
    overflow-x: hidden;
    height: 100vh;
}

h2 {
    font-size: 1.8rem;
    margin-bottom: 15px;
}

nav {
    padding: 1rem;
}

nav a {
    margin-right: 15px;
    text-decoration: none;
}

main {
    padding: 2rem;
    flex: 1;
    max-width: 800px;
    margin: 0 auto;
}

footer {
    padding: 1rem;
    text-align: center;
}

.card {
    border: 1px solid #ddd;
    padding: 10px;
    border-radius: 8px;
    margin-top: 10px;
}