:root {
    --background: #07090d;
    --background-soft: #0e1118;
    --background-light: #151922;
    --text: #f5f3ef;
    --text-muted: #a9acb5;
    --accent: #d9935b;
    --accent-light: #f1b780;
    --border: rgba(255, 255, 255, 0.14);
    --content-width: 1180px;
}

* {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    margin: 0;
    background: var(--background);
    color: var(--text);
    font-family:
        Inter,
        Helvetica Neue,
        Helvetica,
        Arial,
        sans-serif;
    line-height: 1.7;
}

body,
button,
a {
    -webkit-font-smoothing: antialiased;
}

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

a {
    color: inherit;
}

.site-header {
    position: fixed;
    top: 0;
    left: 0;
    z-index: 1000;
    width: 100%;
    height: 82px;
    padding: 0 5vw;
    display: flex;
    align-items: center;
    justify-content: space-between;
    background: rgba(7, 9, 13, 0.72);
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
    backdrop-filter: blur(18px);
}

.site-name {
    color: var(--text);
    font-size: 0.83rem;
    font-weight: 700;
    letter-spacing: 0.18em;
    text-decoration: none;
}

.navigation {
    display: flex;
    align-items: center;
    gap: 2rem;
}

.navigation a {
    color: rgba(255, 255, 255, 0.74);
    font-size: 0.78rem;
    font-weight: 600;
    letter-spacing: 0.08em;
    text-decoration: none;
    text-transform: uppercase;
    transition:
        color 0.25s ease,
        transform 0.25s ease;
}

.navigation a:hover {
    color: var(--accent-light);
    transform: translateY(-2px);
}

.menu-button {
    display: none;
    padding: 0;
    border: 0;
    background: transparent;
    color: white;
    font-size: 1.5rem;
    cursor: pointer;
}

.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: flex-end;
    overflow: hidden;
    background-image: url("images/hero.jpg");
    background-position: center;
    background-size: cover;
}

.hero::after {
    content: "";
    position: absolute;
    inset: 0;
    background:
        radial-gradient(
            circle at 65% 30%,
            rgba(126, 74, 41, 0.14),
            transparent 36%
        ),
        linear-gradient(
            90deg,
            rgba(2, 3, 6, 0.94) 0%,
            rgba(2, 3, 6, 0.62) 43%,
            rgba(2, 3, 6, 0.2) 78%,
            rgba(2, 3, 6, 0.5) 100%
        ),
        linear-gradient(
            0deg,
            rgba(2, 3, 6, 0.95) 0%,
            transparent 48%
        );
}

.hero-overlay {
    position: absolute;
    inset: 0;
    background:
        linear-gradient(
            180deg,
            rgba(0, 0, 0, 0.08),
            rgba(0, 0, 0, 0.22)
        );
}

.hero-content {
    position: relative;
    z-index: 2;
    width: min(920px, 90vw);
    margin-left: max(5vw, calc((100vw - var(--content-width)) / 2));
    padding: 0 0 12vh;
}

.eyebrow,
.section-label {
    margin: 0 0 1.4rem;
    color: var(--accent-light);
    font-size: 0.72rem;
    font-weight: 700;
    letter-spacing: 0.2em;
    text-transform: uppercase;
}

.hero h1 {
    max-width: 850px;
    margin: 0;
    font-family: Georgia, "Times New Roman", serif;
    font-size: clamp(4rem, 10vw, 8.6rem);
    font-weight: 400;
    letter-spacing: -0.055em;
    line-height: 0.9;
}

.hero-subtitle {
    margin: 2.2rem 0 0;
    font-family: Georgia, "Times New Roman", serif;
    font-size: clamp(1.35rem, 2.5vw, 2.1rem);
}

.hero-institution {
    margin: 0.25rem 0 0;
    color: var(--text-muted);
    font-size: 1rem;
}

.hero-buttons {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
    margin-top: 2.5rem;
}

.button {
    display: inline-flex;
    min-height: 52px;
    padding: 0.85rem 1.5rem;
    align-items: center;
    justify-content: center;
    border: 1px solid var(--border);
    color: white;
    font-size: 0.76rem;
    font-weight: 700;
    letter-spacing: 0.1em;
    text-decoration: none;
    text-transform: uppercase;
    transition:
        background 0.25s ease,
        border-color 0.25s ease,
        color 0.25s ease,
        transform 0.25s ease;
}

.button:hover {
    transform: translateY(-3px);
}

.button-primary {
    border-color: var(--accent);
    background: var(--accent);
    color: #0b0b0c;
}

.button-primary:hover {
    border-color: var(--accent-light);
    background: var(--accent-light);
}

.button-outline:hover {
    border-color: var(--accent-light);
    color: var(--accent-light);
}

.scroll-indicator {
    position: absolute;
    right: 5vw;
    bottom: 9vh;
    z-index: 3;
    display: flex;
    gap: 1rem;
    align-items: center;
    color: rgba(255, 255, 255, 0.62);
    font-size: 0.7rem;
    letter-spacing: 0.15em;
    text-decoration: none;
    text-transform: uppercase;
    transform: rotate(90deg);
    transform-origin: right center;
}

.scroll-line {
    width: 70px;
    height: 1px;
    background: rgba(255, 255, 255, 0.45);
}

.section {
    padding: 9rem 5vw;
}

.section-inner {
    width: min(var(--content-width), 100%);
    margin: 0 auto;
}

.section-inner.narrow {
    width: min(850px, 100%);
}

.section-dark {
    background: var(--background);
}

.about-grid {
    display: grid;
    grid-template-columns: minmax(260px, 0.8fr) minmax(0, 1.4fr);
    gap: clamp(3rem, 8vw, 8rem);
    align-items: center;
}

.profile-placeholder,
.profile-image {
    width: min(390px, 100%);
    aspect-ratio: 4 / 5;
}

.profile-placeholder {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    border: 1px solid var(--border);
    background:
        linear-gradient(
            145deg,
            rgba(217, 147, 91, 0.18),
            rgba(255, 255, 255, 0.02)
        );
}

.profile-placeholder span {
    font-family: Georgia, "Times New Roman", serif;
    font-size: 5rem;
    color: var(--accent-light);
}

.profile-placeholder p {
    color: var(--text-muted);
    font-size: 0.75rem;
    letter-spacing: 0.15em;
    text-transform: uppercase;
}

.profile-image {
    object-fit: cover;
    filter: grayscale(20%);
}

h2,
h3 {
    font-family: Georgia, "Times New Roman", serif;
    font-weight: 400;
}

h2 {
    max-width: 900px;
    margin: 0 0 2rem;
    font-size: clamp(2.7rem, 5vw, 5rem);
    letter-spacing: -0.04em;
    line-height: 1.05;
}

h3 {
    margin: 0 0 1.5rem;
    font-size: clamp(2rem, 3.5vw, 3.5rem);
    line-height: 1.1;
}

p {
    color: var(--text-muted);
}

.large-text {
    color: rgba(255, 255, 255, 0.88);
    font-family: Georgia, "Times New Roman", serif;
    font-size: clamp(1.3rem, 2vw, 1.75rem);
    line-height: 1.55;
}

.about-content > p:not(.section-label) {
    max-width: 700px;
}

.link-row {
    display: flex;
    gap: 2rem;
    margin-top: 2rem;
}

.link-row a,
.publication-links a,
.social-links a {
    color: var(--text);
    font-size: 0.76rem;
    font-weight: 700;
    letter-spacing: 0.09em;
    text-decoration: none;
    text-transform: uppercase;
    border-bottom: 1px solid var(--accent);
    padding-bottom: 0.3rem;
}

.research-intro {
    background: var(--background-soft);
    border-top: 1px solid var(--border);
    border-bottom: 1px solid var(--border);
}

.research-panel {
    min-height: 760px;
    display: grid;
    grid-template-columns: 1.15fr 0.85fr;
    background: var(--background);
    border-bottom: 1px solid var(--border);
}

.research-panel-reverse {
    grid-template-columns: 0.85fr 1.15fr;
}

.research-panel-reverse .research-image {
    order: 2;
}

.research-image {
    min-height: 650px;
    overflow: hidden;
    background: #000;
}

.research-image img {
    width: 100%;
    height: 100%;
    object-fit: contain;
    transition: transform 0.7s ease;
}

.research-panel:hover .research-image img {
    transform: scale(1.025);
}

.research-content {
    display: flex;
    flex-direction: column;
    justify-content: center;
    padding: clamp(3rem, 7vw, 7rem);
}

.research-content p:not(.section-label) {
    max-width: 600px;
}

.publications-section {
    background: var(--background-soft);
}

.section-heading {
    display: grid;
    grid-template-columns: 1fr 0.8fr;
    gap: 4rem;
    align-items: end;
    margin-bottom: 5rem;
}

.section-heading > p {
    max-width: 500px;
}

.publication {
    display: grid;
    grid-template-columns: 100px 1fr;
    gap: 2rem;
    padding: 3rem 0;
    border-top: 1px solid var(--border);
}

.publication:last-of-type {
    border-bottom: 1px solid var(--border);
}

.publication-number {
    color: var(--accent-light);
    font-family: Georgia, "Times New Roman", serif;
    font-size: 1.4rem;
}

.publication h3 {
    max-width: 850px;
    margin-bottom: 0.8rem;
    font-size: clamp(1.7rem, 3vw, 2.6rem);
}

.publication p {
    max-width: 700px;
}

.publication-links {
    display: flex;
    gap: 1.4rem;
    margin-top: 1.3rem;
}

.profile-links {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
    margin-top: 4rem;
}

.talks-section {
    background:
        linear-gradient(
            130deg,
            rgba(217, 147, 91, 0.08),
            transparent 45%
        ),
        var(--background);
}

.contact-section {
    position: relative;
    min-height: 680px;
    display: flex;
    align-items: center;
    overflow: hidden;
}

.contact-background {
    position: absolute;
    inset: 0;
    background-image:
        linear-gradient(
            90deg,
            rgba(4, 5, 8, 0.98),
            rgba(4, 5, 8, 0.68),
            rgba(4, 5, 8, 0.42)
        ),
        url("images/hero.jpg");
    background-position: center;
    background-size: cover;
    filter: saturate(70%);
}

.contact-content {
    position: relative;
    z-index: 2;
    padding: 8rem 0;
}

.contact-content > p {
    max-width: 600px;
}

.email-link {
    display: inline-block;
    margin-top: 2rem;
    color: var(--accent-light);
    font-family: Georgia, "Times New Roman", serif;
    font-size: clamp(1.4rem, 3vw, 2.5rem);
    text-decoration: none;
    border-bottom: 1px solid var(--accent);
}

.social-links {
    display: flex;
    flex-wrap: wrap;
    gap: 1.8rem;
    margin-top: 3rem;
}

.footer {
    min-height: 110px;
    padding: 2rem 5vw;
    display: flex;
    align-items: center;
    justify-content: space-between;
    background: #040507;
    border-top: 1px solid var(--border);
}

.footer p,
.footer a {
    margin: 0;
    color: #81858e;
    font-size: 0.75rem;
    letter-spacing: 0.08em;
    text-decoration: none;
    text-transform: uppercase;
}


@media (max-width: 900px) {

    .site-header {
        height: 70px;
    }

    .menu-button {
        display: block;
    }

    .navigation {
        position: absolute;
        top: 70px;
        right: 0;
        width: min(330px, 100vw);
        padding: 2rem;
        display: none;
        flex-direction: column;
        align-items: flex-start;
        gap: 1.3rem;
        background: rgba(7, 9, 13, 0.98);
        border-left: 1px solid var(--border);
        border-bottom: 1px solid var(--border);
    }

    .navigation-open {
        display: flex;
    }

    .hero-content {
        padding-bottom: 15vh;
    }

    .scroll-indicator {
        display: none;
    }

    .about-grid,
    .section-heading {
        grid-template-columns: 1fr;
    }

    .portrait-column {
        display: flex;
        justify-content: center;
    }

    .research-panel,
    .research-panel-reverse {
        min-height: auto;
        grid-template-columns: 1fr;
    }

    .research-panel-reverse .research-image {
        order: initial;
    }

    .research-image {
        min-height: 420px;
    }

    .research-content {
        min-height: 500px;
    }
}


@media (max-width: 600px) {

    .section {
        padding: 6rem 6vw;
    }

    .hero-content {
        margin-left: 6vw;
        padding-right: 6vw;
    }

    .hero h1 {
        font-size: clamp(3.6rem, 21vw, 6rem);
    }

    .hero-buttons {
        align-items: stretch;
        flex-direction: column;
    }

    .button {
        width: 100%;
    }

    .research-image {
        min-height: 320px;
    }

    .research-content {
        min-height: auto;
        padding: 5rem 6vw;
    }

    .publication {
        grid-template-columns: 1fr;
        gap: 0.8rem;
    }

    .footer {
        gap: 1rem;
        align-items: flex-start;
        flex-direction: column;
    }
}