body, html {
    margin: 0;
    padding: 0;
    font-family: Arial, sans-serif;
    background-color: #f4f4f4;
}

header {
    background-color: #ff6a00;
    color: white;
    padding: 10px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: 24px;
}

nav ul {
    list-style-type: none;
}

nav ul li {
    display: inline;
    margin-right: 20px;
}

nav ul li a {
    color: white;
    text-decoration: none;
}

.main {
    padding: 20px;
}

.grid-container {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
}

.card {
    background-color: #ffffff;
    padding: 20px;
    border-radius: 5px;
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
}

footer {
    background-color: #333333;
    color: white;
    text-align: center;
    padding: 10px;
}