html, body {
    height: 100%;
    margin: 0;
    padding: 0;
    font-family: Arial, sans-serif;
    background-color: #f4f7f6;
    color: #333;
    display: flex;
    flex-direction: column;
}

main {
    flex: 1;
}

.container {
    width: 90%;
    max-width: 1200px;
    margin: auto;
}

header {
    position: sticky;
    top: 0;
    z-index: 1000;
    background-color: #3687b3;
    padding: 30px 0;
    box-shadow: 0 4px 10px rgba(0,0,0,0.3);
    color: #fff;
}

nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    display: flex;
    align-items: center;
    font-size: 24px;
    font-weight: bold;
    color: #fff;
    gap: 10px;
    cursor: pointer;
    text-decoration: none;
    color: inherit;
}

.logo-img {
    height: 40px;
    width: auto;
}

.nav-links a {
    margin: 0 15px;
    text-decoration: none;
    font-weight: bold;
    color: #ddd;
    transition: color 0.3s ease;
}

.nav-links a:hover {
    color: #fff;
}

footer {
    background-color: #263238;
    color: #bbb;
    padding: 50px 0;
    text-align: center;
    margin-top: 60px;
    box-shadow: inset 0 1px 0 rgba(255,255,255,0.1);
}

footer a {
    color: #fff;
    text-decoration: none;
    margin: 0 10px;
}

footer a:hover {
    text-decoration: underline;
}