body {
    margin: 0;
    font-family: "Helvetica Neue", Arial, sans-serif;
    background: #f5f7fb;
    color: #222;
}

.container {
    max-width: 850px;
    margin: 80px auto;
    padding: 40px 50px;
    background: #fff;
    border-radius: 14px;
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.08);
}

h1 {
    margin: 0;
    color: #005fa3;
    font-size: 2.3rem;
    text-align: center;
}

h2 {
    margin: 0.4em 0 0.2em;
    font-size: 1.4rem;
    font-weight: normal;
    text-align: center;
}

.authors {
    margin: 1em 0 1.5em;
    text-align: center;
    color: #666;
    font-size: 1.05rem;
}

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

li {
    margin: 18px 0;
}

/* Navigation links */
ul li a {
    display: block;
    padding: 16px 22px;
    border-radius: 10px;
    background: #f0f6ff;
    border: 1px solid #d7e6f8;
    color: #005fa3;
    text-decoration: none;
    font-size: 1.15rem;
    transition: background 0.2s, transform 0.2s;
}

ul li a:hover {
    background: #e2efff;
    transform: translateX(4px);
}

/* Bottom section */
.bottom-section {
    margin-top: 40px;
    text-align: center;
    color: #666;
}

.bottom-section p {
    margin-bottom: 16px;
}

.bottom-section img {
    display: block;
    width: 300px;
    max-width: 100%;
    height: auto;
    margin-left: auto;
    margin-right: auto;
}

/* Mobile */
@media (max-width: 600px) {
    .container {
        margin: 20px 12px;
        padding: 24px 20px;
    }

    h1 {
        font-size: 1.8rem;
    }

    h2 {
        font-size: 1.2rem;
    }

    ul li a {
        font-size: 1rem;
        padding: 14px 18px;
    }

    .bottom-section img {
        width: 220px;
    }
}