:root {
    --grey: rgb(90, 90, 90);
    /* Columbia Blues: https://visualidentity.columbia.edu/content/colors-1 */
    --blue1: rgb(2, 33, 105);
    --blue2: rgb(0, 51, 160);
    --blue3: rgb(0, 114, 206);
    --blue4: rgb(108, 172, 228);
    --pink1: #F9564F;
}

html,
p {
    margin: 0;
    padding: 0;
    border: 0;
    font-size: 100%;
    font: inherit;
    vertical-align: baseline;
    font-family: 'Source Sans Pro', sans-serif;
    font-weight: 300;
    letter-spacing: 0.5px;
    color: var(--grey);
}

p {
    margin: 0.2em;
}

ol,
ul {
    list-style: none;
}

ul {
    list-style-position: inside;
    list-style-type: none;
    padding-left: 0;
    margin: 0;
}

li {
    padding-left: 1.5em;
    text-indent: -1.5em;
}

a {
    text-decoration: none;
    color: var(--pink1);
}

i {
    font-style: italic;
}

h1 {
    font-weight: 500;
    color: var(--blue1);
}

b {
    font-weight: 500;
}

strong {
    color: #fdc450;
    font-weight: 700;
}

/**************************************************/

#header {
    height: 2em;
    line-height: 2em;
    padding-top: 10px;
    padding-bottom: 10px;
    border-bottom: 1px solid #ddd;
    position: fixed;
    top: 0;
    left: 50% - 500px;
    z-index: 9999;
    width: 1000px;
    background-color: rgba(255, 255, 255, 0.7);
    backdrop-filter: blur(8px);
}

#header a {
    text-decoration: none;
    color: var(--grey);
    transition: color 0.3s ease;
}

#header a:hover {
    color: var(--pink1);
}

/**************************************************/

#profile {
    scroll-margin-top: 80px;
    padding: 90px 30px 10px 30px;
    border-bottom: 1px solid #ddd;
}

#profile-pic {
    float: left;
    margin-right: 40px;
    text-align: center;
}

#profile img {
    width: 400px;
    margin-bottom: 18px;
}

#profile-name {
    font-size: 3em;
    line-height: 1em;
    font-weight: 400;
    margin-bottom: 10px;
    color: var(--blue1);
    text-align: center;
}


#profile-email {
    margin-bottom: 20px;
    color: var(--blue1);
    text-align: center;
}

#profile p {
    margin-bottom: 20px;
}


.divider {
    width: 100%;
    border-bottom: 1px solid #ddd;
}

.research-thumb {
    width: 25em;
    height: auto;
    float: left;
    margin-top: 7px;
    padding-right: 30px;
    margin-bottom: 20px;
}

.research-thumb img {
    width: 100%;
    height: auto;
    object-fit: contain;
}

.research-proj-title {
    color: var(--blue1);
    font-weight: 400;
}

/* Hobby section */
.hobby_img {
    width: 100%;
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
    padding: 20px 0;
}

.hobby_img img {
    width: 100%;
    height: 300px;
    object-fit: cover;
    border-radius: 8px;
}

.hobby_img .row,
.hobby_img .column {
    display: block;
    padding: 0;
    margin: 0;
}