/* =========================================================
   Gustavo Noguera Boersner — Academic Website
   Multi-page version. No external CSS, fonts, scripts, or frameworks.
   ========================================================= */

:root {
    --background: #ffffff;
    --background-muted: #f5f7f8;
    --text: #18222d;
    --text-muted: #5f6b76;
    --accent: #245a78;
    --accent-dark: #173f57;
    --accent-light: #eaf1f5;
    --border: #dce2e6;
    --serif: Georgia, "Times New Roman", Times, serif;
    --sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
            Helvetica, Arial, sans-serif;
    --container: 1100px;
    --content: 850px;
    --header-height: 72px;
}

* {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    margin: 0;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    background: var(--background);
    color: var(--text);
    font-family: var(--sans);
    font-size: 16px;
    line-height: 1.72;
    -webkit-font-smoothing: antialiased;
}

main {
    flex: 1;
}

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

a {
    color: var(--accent);
    text-decoration: none;
    text-underline-offset: 3px;
}

a:hover {
    text-decoration: underline;
}

p {
    margin-top: 0;
}

.container {
    width: min(calc(100% - 44px), var(--container));
    margin: 0 auto;
}

.content-column {
    max-width: var(--content);
}

.page-section {
    padding: 80px 0 92px;
}

.page-section-muted {
    background: var(--background-muted);
}

/* Header */

.site-header {
    position: sticky;
    top: 0;
    z-index: 100;
    min-height: var(--header-height);
    background: rgba(255, 255, 255, 0.97);
    border-bottom: 1px solid var(--border);
}

.header-inner {
    min-height: var(--header-height);
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 30px;
}

.brand {
    color: var(--text);
    font-family: var(--serif);
    font-size: 1.34rem;
    font-weight: 700;
    white-space: nowrap;
}

.brand:hover {
    color: var(--accent);
    text-decoration: none;
}

.main-nav {
    display: flex;
    align-items: center;
    gap: 30px;
}

.main-nav a {
    position: relative;
    padding: 24px 0 22px;
    color: var(--text);
    font-size: 0.92rem;
    font-weight: 600;
}

.main-nav a:hover {
    color: var(--accent);
    text-decoration: none;
}

.main-nav a.active {
    color: var(--accent);
}

.main-nav a.active::after {
    content: "";
    position: absolute;
    left: 0;
    right: 0;
    bottom: -1px;
    height: 2px;
    background: var(--accent);
}

/* Typography */

h1,
h2,
h3,
h4 {
    margin-top: 0;
    color: var(--text);
    font-family: var(--serif);
    line-height: 1.24;
}

h1 {
    margin-bottom: 28px;
    font-size: clamp(2.5rem, 5vw, 4.2rem);
    font-weight: 700;
    letter-spacing: -0.035em;
}

h2 {
    margin-bottom: 0;
    font-size: clamp(2rem, 4vw, 3rem);
    letter-spacing: -0.025em;
}

h3 {
    margin-bottom: 20px;
    font-size: 1.52rem;
}

h4 {
    margin-bottom: 0;
    font-size: 1.19rem;
}

.eyebrow {
    margin-bottom: 9px;
    color: var(--accent);
    font-size: 0.77rem;
    font-weight: 700;
    letter-spacing: 0.13em;
    text-transform: uppercase;
}

.page-heading {
    margin-bottom: 45px;
    padding-bottom: 20px;
    border-bottom: 1px solid var(--border);
}

/* About */

.about-grid {
    display: grid;
    grid-template-columns: minmax(210px, 275px) minmax(0, 1fr);
    gap: clamp(48px, 8vw, 92px);
    align-items: start;
}

.profile-photo {
    width: 100%;
    aspect-ratio: 4 / 5;
    object-fit: cover;
    object-position: center 36%;
    border: 1px solid var(--border);
    border-radius: 3px;
}

.about-copy {
    max-width: 720px;
    padding-top: 0;
}

.about-copy > p:not(.eyebrow) {
    margin-bottom: 22px;
    font-size: 1.06rem;
}

.job-market-note {
    margin-top: 30px;
    padding: 17px 19px;
    background: var(--accent-light);
    border-left: 3px solid var(--accent);
    font-size: 1.02rem;
}

.about-actions {
    margin-top: 28px;
}

.button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 46px;
    padding: 10px 18px;
    border: 1px solid transparent;
    border-radius: 4px;
    font-size: 0.92rem;
    font-weight: 700;
    transition: transform 120ms ease, background 120ms ease;
}

.button:hover {
    text-decoration: none;
}

.button-primary {
    background: var(--accent);
    color: #ffffff;
}

.button-primary:hover {
    background: var(--accent-dark);
    transform: translateY(-1px);
}

.button-disabled {
    background: #e6eaed;
    color: #7c8791;
    cursor: default;
}

.contact {
    margin-top: 27px;
    padding-top: 22px;
    border-top: 1px solid var(--border);
}

.contact-block + .contact-block {
    margin-top: 22px;
}

.contact-title {
    margin-bottom: 19px;
    font-size: 1.12rem;
}


.contact-block h3 {
    margin-bottom: 6px;
    color: var(--text-muted);
    font-family: var(--sans);
    font-size: 0.75rem;
    font-weight: 700;
    letter-spacing: 0.1em;
    text-transform: uppercase;
}

.contact-block > a {
    display: block;
    width: fit-content;
    max-width: 100%;
    overflow-wrap: anywhere;
    font-size: 0.9rem;
}

.profile-links {
    display: flex;
    flex-wrap: wrap;
    gap: 8px 15px;
    font-size: 0.9rem;
}

.contact-address {
    margin: 0;
    color: var(--text-muted);
    font-size: 0.9rem;
    line-height: 1.55;
}

/* Research */

.research-group + .research-group {
    margin-top: 58px;
}

.research-group > h3,
.teaching-group > h3 {
    padding-bottom: 13px;
    border-bottom: 1px solid var(--border);
}

.paper {
    padding: 25px 0 28px;
    border-bottom: 1px solid var(--border);
}

.paper.compact {
    padding: 21px 0 22px;
}

.paper-title-row {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 22px;
}

.paper-title-row h4 {
    max-width: 650px;
}

.badge {
    flex: 0 0 auto;
    padding: 4px 9px;
    border: 1px solid #b8cdda;
    border-radius: 999px;
    background: var(--accent-light);
    color: var(--accent-dark);
    font-size: 0.73rem;
    font-weight: 700;
    white-space: nowrap;
}

.paper-status,
.coauthor {
    margin: 7px 0 0;
    color: var(--text-muted);
    font-size: 0.94rem;
}

.paper-links {
    display: flex;
    flex-wrap: wrap;
    align-items: flex-start;
    gap: 14px 20px;
    margin-top: 17px;
}

.paper-link,
.abstract summary {
    color: var(--accent);
    font-size: 0.9rem;
    font-weight: 700;
}

.paper-link.disabled {
    color: #9099a1;
}

.abstract {
    flex-basis: 100%;
}

.abstract summary {
    width: fit-content;
    cursor: pointer;
    list-style: none;
}

.abstract summary::-webkit-details-marker {
    display: none;
}

.abstract summary::after {
    content: "  +";
}

.abstract[open] summary::after {
    content: "  −";
}

.abstract-body {
    margin-top: 14px;
    padding: 18px 20px;
    background: #ffffff;
    border-left: 3px solid var(--accent);
}

.abstract-body p {
    margin: 0;
    color: #3f4b55;
}

/* Teaching */

.teaching-group + .teaching-group {
    margin-top: 52px;
}

.teaching-item {
    padding: 20px 0;
    border-bottom: 1px solid var(--border);
}

.teaching-item p {
    margin: 6px 0 0;
}

.teaching-meta {
    color: var(--text-muted);
    font-size: 0.93rem;
}

.teaching-note {
    margin: 30px 0 0;
    color: var(--text-muted);
    font-style: italic;
}

/* CV */

.cv-actions {
    margin-bottom: 24px;
}

.cv-preview-placeholder {
    min-height: 520px;
    display: grid;
    place-items: center;
    padding: 42px;
    background: #ffffff;
    border: 1px solid var(--border);
    text-align: center;
}

.cv-preview-placeholder h3 {
    margin-bottom: 10px;
}

.cv-preview-placeholder p {
    max-width: 520px;
    margin: 0 auto 8px;
    color: var(--text-muted);
}

.small-note {
    font-size: 0.88rem;
}

.pdf-viewer {
    height: min(82vh, 980px);
    min-height: 650px;
    overflow: hidden;
    background: #ffffff;
    border: 1px solid var(--border);
}

.pdf-viewer iframe {
    width: 100%;
    height: 100%;
    border: 0;
}

/* Responsive */

@media (max-width: 780px) {
    .site-header {
        position: static;
    }

    .header-inner {
        padding: 15px 0 13px;
        align-items: flex-start;
        flex-direction: column;
        gap: 10px;
    }

    .main-nav {
        width: 100%;
        gap: 20px;
        overflow-x: auto;
        padding-bottom: 2px;
    }

    .main-nav a {
        padding: 4px 0 8px;
    }

    .main-nav a.active::after {
        bottom: 0;
    }

    .page-section {
        padding: 58px 0 72px;
    }

    .about-grid {
        grid-template-columns: 1fr;
        gap: 44px;
    }


    .profile-column {
        width: min(100%, 355px);
    }

    .paper-title-row {
        flex-direction: column;
        gap: 11px;
    }

    .cv-preview-placeholder {
        min-height: 380px;
        padding: 28px;
    }

    .pdf-viewer {
        min-height: 520px;
    }

}

@media (max-width: 460px) {
    .container {
        width: min(calc(100% - 30px), var(--container));
    }

    .main-nav {
        gap: 16px;
    }

    .main-nav a {
        font-size: 0.88rem;
    }

    h1 {
        font-size: 2.45rem;
    }
}