body {
    margin: 0;
    font-family: system-ui, sans-serif;
    line-height: 1.6;
    color: #222;
    background: #fff;
}

header {
    padding: 1rem 2rem;
    border-bottom: 1px solid #ddd;
}

nav {
    max-width: 1000px;
    margin: auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

nav a {
    margin-left: 1rem;
    color: inherit;
    text-decoration: none;
}

nav a:hover {
    text-decoration: underline;
}

main {
    max-width: 1000px;
    margin: auto;
    padding: 0 2rem;
}

section {
    padding: 4rem 0;
}

.hero {
    text-align: center;
    padding: 7rem 0;
}

.hero h1 {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.button {
    display: inline-block;
    padding: 0.75rem 1.25rem;
    background: #5593c2;
    color: white;
    text-decoration: none;
    border-radius: 4px;
}

.button:hover {
    background: #3b7eb1;
}

.cards {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
}

.card {
    padding: 1.5rem;
    border: 1px solid #ddd;
    border-radius: 6px;
}

footer {
    margin-top: 4rem;
    padding: 2rem;
    text-align: center;
    border-top: 1px solid #ddd;
    color: #666;
}

@media (max-width: 700px) {
    .cards {
        grid-template-columns: 1fr;
    }

    .hero h1 {
        font-size: 2.25rem;
    }
}