body{
    margin:0;
font-family:"Source Sans 3", Arial, sans-serif;    
    background:#f7f9fc;
    color: #13233a;
    line-height:1.6;
}

.container{
    display:flex;
    min-height:100vh;
}

.sidebar{
    width:280px;
    background:#0f2747;
    color:#fff;
    padding:40px 30px;
    position:fixed;
    top:0;
    bottom:0;
}

.sidebar h1{
    font-size:2.2rem;
    line-height:1.1;
    margin-top:0;
}

.sidebar nav a{
    display:block;
    color:#fff;
    text-decoration:none;
    padding:8px 0;
}

.sidebar nav a.active,
.sidebar nav a:hover{
    color:#ff6b8a;
}

.content{
    width:100%;
    max-width:900px;
    margin-left:340px;
    padding:50px;
    min-height:100vh;
    background:#ffffff;
    box-sizing:border-box;
}


.intro{
    display:flex;
    align-items:flex-start;
    gap:30px;
    margin-bottom:30px;
}

.profile-photo{
    width:180px;
    height:auto;
    border:1px solid #d8e0ea;
    border-radius:4px;
    flex-shrink:0;
}

.intro-text h2{
    margin:0;
    font-size:1.25rem;
    font-weight:500;
    line-height:1.3;
}

.university{
    margin:8px 0 18px;
    font-size:1.05rem;
}

.research-interests{
    margin:0;
    font-size:1.2rem;
    font-weight:600;
}

.research-interests span{
    font-weight:400;
}

h1{
    font-size:3rem;
}

h2{
    margin-top:0;
}

@media(max-width:800px){

.sidebar{
    position:relative;
    width:auto;
}

.content{
    margin-left:0;
    padding:25px;
}

.container{
    display:block;
}

.intro{
    display:block;
}

.profile-photo{
    display:block;
    margin:0 auto 25px;
    width:180px;
}
}

    .sidebar nav a.active,
.sidebar nav a:hover,
a{
    color:#ff6b8a;
}

h3{
    margin-top:40px;
    margin-bottom:10px;
}

h4{
    margin-top:25px;
    margin-bottom:5px;
    font-weight:600;
}

ul{
    margin-top:5px;
    margin-bottom:20px;
}

h3{
    margin-top:40px;
    margin-bottom:15px;
    font-size:1.35rem;
}

.content p{
    margin-bottom:22px;
}