:root {
    --color-dark: #212529;
    --color-hero-start: #1a1a1a;
    --color-hero-end: #0d1b2a;
    --color-primary: #0d6efd;
    --color-muted-bg: #f8f9fa;
    --color-border: #dee2e6;
    --nav-height: 63px;
}

*,
*::before,
*::after {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    scroll-padding-top: var(--nav-height);
}

body {
    margin: 0;
    padding-top: var(--nav-height);
    color: var(--color-dark);
    font-family: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    font-size: 1.3rem;
    line-height: 1.5;
}

img {
    display: block;
    max-width: 100%;
}

a {
    color: var(--color-primary);
}

.container {
    width: 100%;
    max-width: 1140px;
    margin: 0 auto;
    padding-right: 12px;
    padding-left: 12px;
}

.site-nav {
    position: fixed;
    z-index: 10;
    top: 0;
    right: 0;
    left: 0;
    min-height: var(--nav-height);
    color: #fff;
    background: var(--color-dark);
}

.nav-inner {
    position: relative;
    display: flex;
    align-items: center;
    min-height: var(--nav-height);
}

.brand {
    display: inline-flex;
    align-items: center;
    color: #fff;
    font-size: 1.25rem;
    font-weight: 700;
    text-decoration: none;
    white-space: nowrap;
}

.brand img {
    width: 24px;
    height: 24px;
    margin-right: 8px;
}

.nav-menu {
    margin-left: auto;
}

.nav-toggle-input {
    position: absolute;
    width: 1px;
    height: 1px;
    overflow: hidden;
    clip: rect(0 0 0 0);
    clip-path: inset(50%);
    white-space: nowrap;
}

.nav-toggle {
    display: none;
    width: 44px;
    height: 40px;
    align-items: center;
    justify-content: center;
    border: 1px solid rgba(255, 255, 255, .1);
    border-radius: 6px;
    cursor: pointer;
    list-style: none;
}

.nav-toggle-input:focus-visible + .nav-toggle {
    outline: 2px solid #fff;
    outline-offset: 2px;
}

.nav-toggle-icon,
.nav-toggle-icon span {
    display: block;
}

.nav-toggle-icon {
    width: 30px;
}

.nav-toggle-icon span {
    height: 2px;
    margin: 4px 0;
    background: #fff;
}

.nav-links {
    display: flex;
    gap: 0;
    align-items: center;
    margin: 0;
    padding: 0;
    list-style: none;
}

.nav-link {
    display: block;
    padding: 8px;
    color: rgba(255, 255, 255, .75);
    font-size: 1rem;
    text-decoration: none;
}

.nav-link:hover,
.nav-link:focus-visible {
    color: #fff;
}

.hero {
    padding: 5rem 0;
    color: #fff;
    text-align: center;
    background: linear-gradient(to right, var(--color-hero-start), var(--color-hero-end));
}

.hero h1,
.hero p {
    margin: 0;
}

.hero h1 {
    font-size: clamp(1.85rem, calc(1.375rem + 1.5vw), 2.5rem);
    line-height: 1.2;
}

.hero p {
    margin-top: 8px;
    font-size: 1.25rem;
    font-weight: 300;
}

section {
    padding: 4rem 0;
}

h2 {
    margin-top: 0;
    margin-bottom: 1rem;
    font-size: clamp(1.625rem, calc(1.325rem + .9vw), 2rem);
    line-height: 1.2;
}

.about-grid {
    width: 100%;
    max-width: 1200px;
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 0;
    margin-right: auto;
    margin-left: auto;
    align-items: center;
}

.about-grid > * {
    padding-right: 12px;
    padding-left: 12px;
}

#about p {
    margin: 0;
    font-size: 1.4rem;
    line-height: 1.8;
}

.about-copy {
    text-align: left;
}

.profile-wrap {
    display: flex;
    justify-content: center;
    text-align: center;
}

.profile-wrap picture {
    display: block;
    width: min(100%, 480px);
}

.profile-img {
    width: 100%;
    max-width: 480px;
    height: auto;
    border-radius: .375rem;
    box-shadow: 0 .5rem 1rem rgba(0, 0, 0, .15);
}

.section-light {
    background: var(--color-muted-bg);
}

.section-title {
    margin-bottom: 1.5rem;
    text-align: center;
}

.interest-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 0;
    margin-right: -12px;
    margin-left: -12px;
    text-align: center;
}

.interest-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: flex-start;
    padding-right: 12px;
    padding-left: 12px;
}

.interest-icon {
    display: inline-block;
    color: var(--color-primary);
    font-size: 2.5rem;
    line-height: 1;
}

.interest-item p {
    margin: 0 0 1rem;
}

.publication-list {
    overflow: hidden;
    border: 1px solid var(--color-border);
    border-radius: .375rem;
}

.publication-list a {
    display: block;
    padding: .5rem 1rem;
    color: var(--color-dark);
    text-decoration: none;
    background: #fff;
}

.publication-list a + a {
    border-top: 1px solid var(--color-border);
}

.publication-list a:hover,
.publication-list a:focus-visible {
    background: var(--color-muted-bg);
}

.contact-section {
    text-align: center;
}

.contact-section p {
    margin-top: 0;
}

.contact-links p {
    margin-bottom: 0;
}

.contact-links p + p {
    margin-top: .5rem;
}

.contact-links i {
    margin-right: .5rem;
}

.site-footer {
    padding: 1rem 0;
    color: #fff;
    text-align: center;
    background: var(--color-dark);
}

@media (min-width: 576px) {
    .container {
        max-width: 540px;
    }
}

@media (min-width: 768px) {
    .container {
        max-width: 720px;
    }
}

@media (min-width: 992px) {
    .container {
        max-width: 960px;
    }
}

@media (min-width: 1200px) {
    .container {
        max-width: 1280px;
    }
}

@media (min-width: 1400px) {
    .container {
        max-width: 1320px;
    }
}

@media (max-width: 991px) {
    .about-grid {
        grid-template-columns: 1fr;
    }

    .nav-inner {
        flex-wrap: wrap;
    }

    .nav-menu {
        width: 100%;
        margin-left: 0;
    }

    .nav-toggle {
        display: flex;
        position: absolute;
        top: 11px;
        right: 12px;
        width: 56px;
    }

    .nav-links {
        position: static;
        display: none;
        width: 100%;
        min-width: 0;
        flex-direction: column;
        gap: 0;
        align-items: stretch;
        padding: 8px 0;
        border: 0;
        border-radius: 0;
        background: transparent;
        box-shadow: none;
    }

    .nav-toggle-input:checked ~ .nav-links {
        display: flex;
    }

    .nav-link {
        padding: 8px 0;
    }
}

@media (max-width: 767px) {
    .interest-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 575px) {
    body {
        font-size: 1.1rem;
    }

    .brand {
        font-size: 1.05rem;
    }

    section {
        padding: 3rem 0;
    }

    #about p {
        font-size: 1.15rem;
        line-height: 1.7;
    }
}