body {
    margin: 0;
    background: #ffffff;
    color: #222222;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI",
                 Helvetica, Arial, sans-serif;
    line-height: 1.7;
}

.container {
    max-width: 760px;
    margin: 0 auto;
    padding: 70px 30px;
}


/* Header */

header {
    margin-bottom: 60px;
}

.header-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 40px;
}

.header-text {
    flex: 1;
}

.profile-photo {
    width: 240px;
    height: auto;
    border-radius: 4px;
    flex-shrink: 0;
}

h1 {
    font-size: 42px;
    font-weight: 600;
    letter-spacing: -1px;
    margin: 0 0 8px 0;
}

.subtitle {
    font-size: 18px;
    color: #666666;
    margin: 0;
}

.affiliation {
    font-size: 16px;
    color: #666666;
    margin: 0;
}


/* Navigation */

nav {
    margin-top: 28px;
}

nav a {
    margin-right: 24px;
    color: #245f8f;
    text-decoration: none;
    font-size: 20px;
}

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


/* General */

section {
    margin-bottom: 60px;
}

h2 {
    font-size: 25px;
    font-weight: 600;
    margin: 0 0 20px 0;
}

p {
    font-size: 16px;
    margin-top: 0;
}

a {
    color: #245f8f;
}


/* Homepage / Publications */

.bio {
    margin-bottom: 60px;
}

.publication {
    margin-bottom: 38px;
}

.paper-title {
    font-size: 18px;
    font-weight: 400;
    line-height: 1.5;
    margin: 0 0 7px 0;
}

.authors {
    font-size: 16px;
    margin: 0 0 2px 0;
}

.journal {
    font-size: 16px;
    margin: 0 0 8px 0;
}

.paper-links {
    margin: 12px 0 0 0;
}


/* Buttons */

.button {
    display: inline-block;
    padding: 4px 10px;
    margin-right: 6px;
    border: 1px solid #333;
    border-radius: 3px;
    text-decoration: none;
    font-size: 0.85em;
    color: #333;
}

.button:hover {
    background-color: #333;
    color: white;
}


/* Teaching */

.course {
    margin-bottom: 50px;
}

.course h3 {
    margin: 0 0 2px 0;
}

.course-meta {
    margin: 0 0 8px 0;
}

.course-instructors {
    font-size: 15px;
    color: #666666;
    margin: 0 0 8px 0;
}

.course-description {
    margin: 0 0 12px 0;
}


/* Code */

.vignette {
    margin-bottom: 45px;
}


/* Birding */

.birding-entry {
    margin-bottom: 55px;
}

.birding-entry h3 {
    margin: 0 0 4px 0;
    font-size: 20px;
    font-weight: 500;
}

.birding-text {
    margin-bottom: 20px;
}

.birding-photos {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
}

.birding-photos figure {
    margin: 0;
    position: relative;
}

.birding-photos img {
    display: block;
    width: 100%;
    height: auto;
    border-radius: 4px;
    cursor: zoom-in;
    transition: transform 0.25s ease;
}

.birding-photos img:hover {
    transform: scale(2);
    position: relative;
    z-index: 10;
}

.birding-photos figcaption {
    margin-top: 6px;
    font-size: 14px;
    color: #666666;
    line-height: 1.5;
    text-align: center;
}


/* Mobile */

@media (max-width: 600px) {

    .container {
        padding: 45px 22px;
    }

    h1 {
        font-size: 34px;
    }

    nav a {
        display: inline-block;
        margin-bottom: 8px;
        margin-right: 18px;
    }

    .paper-title {
        font-size: 16px;
    }

    .birding-photos {
        grid-template-columns: 1fr;
    }
}