body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    margin: 0;
    padding: 0;
    background-color: #f4f7f9;
    color: #333;
    line-height: 1.6;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

header {
    background-color: #005a9e;
    color: #fff;
    padding: 1rem 2rem;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

header h1 {
    margin: 0;
    font-size: 1.8rem;
}

nav ul {
    padding: 0;
    list-style: none;
    margin: 0;
}

nav ul li {
    display: inline;
    margin-left: 25px;
}

nav a {
    color: #fff;
    text-decoration: none;
    font-weight: 500;
    transition: opacity 0.3s ease;
}

nav a:hover {
    opacity: 0.8;
}

main {
    flex-grow: 1;
    padding: 2rem;
    max-width: 1200px;
    margin: 2rem auto;
    width: 100%;
    box-sizing: border-box;
}

section {
    background: #fff;
    padding: 2rem;
    border-radius: 8px;
    box-shadow: 0 4px 8px rgba(0,0,0,0.05);
    margin-bottom: 2rem;
}

h2, h3 {
    color: #005a9e;
    border-bottom: 2px solid #eef2f5;
    padding-bottom: 0.5rem;
    margin-top: 0;
}

.links-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
    margin-top: 1rem;
}

.link-card {
    display: block;
    background-color: #f4f7f9;
    padding: 1.5rem;
    text-align: center;
    border-radius: 8px;
    text-decoration: none;
    color: #005a9e;
    font-weight: 600;
    box-shadow: 0 2px 4px rgba(0,0,0,0.05);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.link-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 6px 12px rgba(0,0,0,0.1);
}

footer {
    text-align: center;
    padding: 1.5rem;
    background: #343a40;
    color: #fff;
    margin-top: auto;
}