body {
    margin: 0;
    font-family: Arial, sans-serif;
    line-height: 1.7;
    padding-top: 70px;
}

/* NAVBAR */

nav {
    position: fixed;
    top: 0;
    width: 100%;
    background: #111;
    padding: 15px;
    text-align: center;
    z-index: 1000;
}

nav a {
    color: white;
    margin: 0 18px;
    text-decoration: none;
    font-size: 16px;
}

nav a:hover {
    opacity: 0.7;
}

/* HERO IMAGE */

.hero {
    background-size: cover;
    background-position: center;
    color: white;
    height: 150px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
}

/* CONTENT AREA */

.content {
    padding: 80px 12%;
}

/* FLEX SECTIONS */

.section-flex {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 50px;
    margin-bottom: 50px;
}

.section-flex img {
    width: 40%;
    border-radius: 10px;
}

.text-block {
    width: 55%;
}

/* ALTERNATING LAYOUT */

.section-flex.reverse {
    flex-direction: row-reverse;
}

/* BACKGROUND SEPARATOR IMAGE */

.separator {
    height: 100px;
    background-size: cover;
    background-position: center;
}

/* FOOTER */

.footer {
    background: #111;
    color: white;
    padding: 50px;
    text-align: center;
}


/* Publications */
.pub-card{
background:#f2f2f2;
border:1px solid #ccc;
padding:18px;
margin-bottom:20px;
box-shadow:0 2px 4px rgba(0,0,0,0.1);
}

.pub-card summary{
display:flex;
justify-content:space-between;
align-items:center;
cursor:pointer;
list-style:none;
}

.pub-text{
flex:1;
}

.arrow{
font-size:18px;
color:#888;
transition:transform 0.2s;
}

.pub-card[open] .arrow{
transform:rotate(90deg);
}

.pub-extra{
margin-top:15px;
}

.abstract-title{
font-weight:bold;
margin-bottom:5px;
}

.pub-figure{
max-width:500px;
width:100%;
margin-top:10px;
border-radius:6px;
}