body {
    font-family: Arial, sans-serif;
    margin: 0;
    color: #3d2b1f;
    background-color: #f8f5e6;
}

header {
    background-color: #00274d;
    color: #f8f5e6;
    padding: 1rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

header .site-title {
    font-size: 1.5rem;
    font-weight: bold;
}

header nav ul {
    list-style: none;
    display: flex;
    gap: 1rem;
}

header nav a {
    color: #f8f5e6;
    text-decoration: none;
}

footer {
    background-color: #00274d;
    color: #f8f5e6;
    text-align: center;
    padding: 0.5rem;
    position: fixed;
    width: 100%;
    bottom: 0;
}

main h1 {
    font-size: 2rem;
    margin: 1rem 0;
}

.calculator {
    background-color: #d5e8d4;
    padding: 1rem;
    border: 1px solid #00274d;
    margin-bottom: 1rem;
    box-shadow: 2px 2px 5px rgba(0, 0, 0, 0.2);
}

input, textarea {
    width: 100%;
    margin-bottom: 0.5rem;
    padding: 0.5rem;
    border: 1px solid #aaa;
}