:root {
    --primary-color: #1a2f4b;
    --secondary-color: #5d7a66;
    --bg-color: #f9f9f9;
    --text-color: #333;
    --white: #ffffff;
    --max-width: 1100px;
}

body {
    font-family: 'Inter', sans-serif;
    line-height: 1.6;
    color: var(--text-color);
    background-color: var(--bg-color);
    margin: 0;
}

.container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 2rem;
}

header {
    background: var(--white);
    border-bottom: 1px solid #ddd;
    text-align: center;
    padding: 2rem 0;
}

nav ul {
    list-style: none;
    padding: 0;
    display: flex;
    justify-content: center;
    gap: 20px;
}

nav a {
    text-decoration: none;
    color: var(--primary-color);
    font-weight: bold;
}

main {
    background: var(--white);
    margin-top: 2rem;
    padding-bottom: 2rem;
    box-shadow: 0 0 10px rgba(0,0,0,0.05);
}

h1, h2, h3, h4 {
    color: var(--primary-color);
}

footer {
    text-align: center;
    padding: 2rem;
    font-size: 0.9rem;
    color: #666;
}

@media (max-width: 768px) {
    nav ul {
        flex-direction: column;
        gap: 10px;
    }
}