body {
    margin:0;
    font-family: 'Segoe UI', Arial, sans-serif;
    background:#f4f4f4;
    color:#222;
}

header {
    background:#111;
    color:#fff;
    padding:30px 20px;
}

header h1 {
    margin:0;
}

nav {
    background:#222;
    padding:15px 20px;
}

nav a {
    color:#fff;
    margin-right:20px;
    text-decoration:none;
    font-weight:bold;
}

.container {
    max-width:1200px;
    margin:40px auto;
    padding:0 20px;
}

.grid {
    display:grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap:30px;
}

.card {
    background:#fff;
    padding:25px;
    border-radius:6px;
    box-shadow:0 4px 12px rgba(0,0,0,0.08);
}

footer {
    background:#111;
    color:#fff;
    text-align:center;
    padding:40px 20px;
    margin-top:60px;
}