/* ============================================
   Renato Duarte — Personal Academic Site
   Minimal modern design, wide layout
   ============================================ */

/* --- Reset & Custom Properties --- */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

:root {
    --color-text: #1c1c28;
    --color-text-secondary: #5a5a6e;
    --color-text-muted: #8a8a9a;
    --color-bg: #ffffff;
    --color-bg-alt: #f6f7f9;
    --color-accent: #2d4a7a;
    --color-accent-hover: #1d3560;
    --color-border: #e2e4e8;
    --color-border-light: #eef0f3;
    --color-surface: #ffffff;
    --color-tag-bg: #edf0f5;
    --color-tag-text: #3d5a8a;
    --color-hero-bg: #f0f2f6;

    --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Inter, Roboto, "Helvetica Neue", Arial, sans-serif;
    --font-serif: Charter, "Bitstream Charter", "Sitka Text", Cambria, serif;
    --font-mono: "JetBrains Mono", "Fira Code", "SF Mono", Menlo, monospace;

    --max-width: 1080px;
    --section-padding: 4.5rem 0;
    --radius: 8px;
    --radius-sm: 5px;
    --shadow-sm: 0 1px 3px rgba(0,0,0,0.06), 0 1px 2px rgba(0,0,0,0.04);
    --shadow-md: 0 4px 12px rgba(0,0,0,0.06), 0 2px 4px rgba(0,0,0,0.04);
    --transition: 0.2s ease;
}

html {
    font-size: 16.5px;
    scroll-behavior: smooth;
    scroll-padding-top: 4rem;
}

body {
    font-family: var(--font-serif);
    color: var(--color-text);
    background: var(--color-bg);
    line-height: 1.7;
    -webkit-font-smoothing: antialiased;
}

.container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 2rem;
}

/* --- Navigation --- */
.nav {
    position: sticky;
    top: 0;
    z-index: 100;
    background: rgba(255, 255, 255, 0.92);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--color-border-light);
}

.nav-inner {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 2rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 3.2rem;
}

.nav-name {
    font-family: var(--font-sans);
    font-weight: 600;
    font-size: 0.92rem;
    color: var(--color-text);
    text-decoration: none;
    letter-spacing: -0.01em;
}

.nav-links {
    display: flex;
    gap: 1.4rem;
}

.nav-links a {
    font-family: var(--font-sans);
    font-size: 0.78rem;
    font-weight: 500;
    color: var(--color-text-secondary);
    text-decoration: none;
    transition: color var(--transition);
    letter-spacing: 0.01em;
}

.nav-links a:hover {
    color: var(--color-accent);
}

/* --- Hero --- */
.hero {
    background: var(--color-hero-bg);
    padding: 4rem 0 3.5rem;
    border-bottom: 1px solid var(--color-border-light);
}

.hero-grid {
    display: grid;
    grid-template-columns: 1fr auto;
    gap: 3rem;
    align-items: center;
}

.hero h1 {
    font-family: var(--font-sans);
    font-size: 2.8rem;
    font-weight: 700;
    letter-spacing: -0.03em;
    line-height: 1.15;
    color: var(--color-text);
}

.hero-role {
    font-family: var(--font-sans);
    font-size: 1.15rem;
    font-weight: 400;
    color: var(--color-text-secondary);
    margin-top: 0.5rem;
    line-height: 1.4;
}

.hero-affiliation {
    font-family: var(--font-sans);
    font-size: 0.9rem;
    color: var(--color-text-muted);
    margin-top: 0.3rem;
}

.hero-affiliation a {
    color: var(--color-accent);
    text-decoration: none;
    font-weight: 500;
}

.hero-affiliation a:hover {
    text-decoration: underline;
}

.hero-links {
    display: flex;
    flex-wrap: wrap;
    gap: 0.6rem;
    margin-top: 1.5rem;
}

.hero-link {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    font-family: var(--font-sans);
    font-size: 0.82rem;
    font-weight: 500;
    color: var(--color-text-secondary);
    text-decoration: none;
    padding: 0.35rem 0.75rem;
    border: 1px solid var(--color-border);
    border-radius: 100px;
    background: var(--color-surface);
    transition: all var(--transition);
}

.hero-link:hover {
    color: var(--color-accent);
    border-color: var(--color-accent);
    box-shadow: var(--shadow-sm);
}

.hero-link svg {
    width: 16px;
    height: 16px;
    flex-shrink: 0;
}

/* Photo */
.profile-photo {
    width: 160px;
    height: 160px;
    border-radius: 50%;
    -webkit-border-radius: 50%;
    object-fit: cover;
    display: block;
    flex-shrink: 0;
    box-shadow: var(--shadow-md);
    clip-path: circle(50%);
}

/* --- Sections --- */
.section {
    padding: var(--section-padding);
}

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

.section-title {
    font-family: var(--font-sans);
    font-size: 1.4rem;
    font-weight: 700;
    letter-spacing: -0.02em;
    color: var(--color-text);
    margin-bottom: 1.5rem;
    padding-bottom: 0.6rem;
    border-bottom: 2px solid var(--color-border);
}

.section-subtitle {
    font-size: 0.92rem;
    color: var(--color-text-secondary);
    margin-bottom: 2rem;
    max-width: 720px;
}

.section-subtitle a {
    color: var(--color-accent);
    text-decoration: none;
    font-weight: 500;
}

.section-subtitle a:hover {
    text-decoration: underline;
}

/* --- About --- */
.about-grid {
    display: grid;
    grid-template-columns: 1fr 180px;
    gap: 3rem;
    align-items: start;
}

.about-text p {
    margin-bottom: 1.1rem;
}

.about-text p:last-child {
    margin-bottom: 0;
}

.about-text a {
    color: var(--color-accent);
    text-decoration: none;
    border-bottom: 1px solid var(--color-border);
    transition: border-color var(--transition);
}

.about-text a:hover {
    border-bottom-color: var(--color-accent);
}

.about-sidebar {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    padding: 1.4rem;
    background: var(--color-bg-alt);
    border-radius: var(--radius);
    border: 1px solid var(--color-border-light);
}

.sidebar-item {
    display: flex;
    flex-direction: column;
    text-align: center;
}

.sidebar-label {
    font-family: var(--font-sans);
    font-size: 0.72rem;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    color: var(--color-text-muted);
}

.sidebar-value {
    font-family: var(--font-sans);
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--color-accent);
    line-height: 1.3;
}

/* --- Research --- */
.research-lines {
    display: grid;
    grid-template-columns: 1fr;
    gap: 2rem;
}

.research-line {
    padding: 1.6rem;
    background: var(--color-surface);
    border: 1px solid var(--color-border-light);
    border-radius: var(--radius);
    transition: box-shadow var(--transition);
}

.research-line:hover {
    box-shadow: var(--shadow-md);
}

.research-line h3 {
    font-family: var(--font-sans);
    font-size: 1rem;
    font-weight: 700;
    color: var(--color-text);
    margin-bottom: 0.6rem;
}

.research-line p {
    font-size: 0.9rem;
    color: var(--color-text-secondary);
    line-height: 1.6;
    margin-bottom: 0.8rem;
}

.research-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.4rem;
}

.research-tags span {
    display: inline-block;
    font-family: var(--font-sans);
    font-size: 0.75rem;
    font-weight: 500;
    color: var(--color-tag-text);
    background: var(--color-tag-bg);
    padding: 0.18rem 0.55rem;
    border-radius: 100px;
    white-space: nowrap;
}

/* --- Career Timeline --- */
.timeline {
    position: relative;
    padding-left: 2rem;
}

.timeline::before {
    content: "";
    position: absolute;
    left: 0.45rem;
    top: 0.5rem;
    bottom: 0.5rem;
    width: 3px;
    background: var(--color-accent);
    transform: translateX(3.5px);
}

.timeline-item {
    position: relative;
    padding-bottom: 2rem;
}

.timeline-item:last-child {
    padding-bottom: 0;
}

.timeline-marker {
    position: absolute;
    left: -1.55rem;
    top: 0.55rem;
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: var(--color-accent);
    border: 2px solid var(--color-bg);
    box-shadow: 0 0 0 2px var(--color-accent);
}

.timeline-content {
    padding-left: 0.5rem;
}

.timeline-date {
    font-family: var(--font-mono);
    font-size: 0.78rem;
    font-weight: 600;
    color: var(--color-text-muted);
    display: block;
    margin-bottom: 0.2rem;
}

.timeline-content h3 {
    font-family: var(--font-sans);
    font-size: 0.95rem;
    font-weight: 700;
    color: var(--color-text);
    margin-bottom: 0.15rem;
    line-height: 1.4;
}

.timeline-org {
    font-family: var(--font-sans);
    font-size: 0.85rem;
    color: var(--color-text-secondary);
    margin-bottom: 0.3rem;
}

.timeline-detail {
    font-size: 0.85rem;
    color: var(--color-text-muted);
    line-height: 1.5;
}

.tenure-badge {
    display: inline-block;
    font-family: var(--font-sans);
    font-size: 0.65rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    color: #2a7a4a;
    background: #e8f5e9;
    padding: 0.1rem 0.45rem;
    border-radius: 100px;
    vertical-align: middle;
    margin-left: 0.3rem;
}

/* --- Skills --- */
.skills-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.2rem;
}

.skill-card {
    background: var(--color-surface);
    border: 1px solid var(--color-border-light);
    border-radius: var(--radius);
    padding: 1.4rem;
    transition: box-shadow var(--transition);
}

.skill-card:hover {
    box-shadow: var(--shadow-md);
}

.skill-card h3 {
    font-family: var(--font-sans);
    font-size: 0.82rem;
    font-weight: 600;
    color: var(--color-text);
    text-transform: uppercase;
    letter-spacing: 0.04em;
    margin-bottom: 0.8rem;
}

.skill-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.4rem;
}

.skill-tags span {
    display: inline-block;
    font-family: var(--font-sans);
    font-size: 0.78rem;
    font-weight: 500;
    color: var(--color-tag-text);
    background: var(--color-tag-bg);
    padding: 0.2rem 0.6rem;
    border-radius: 100px;
    white-space: nowrap;
}

/* --- Software --- */
.software-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1.2rem;
}

.software-item {
    padding: 1.4rem;
    background: var(--color-bg-alt);
    border: 1px solid var(--color-border-light);
    border-radius: var(--radius);
    transition: box-shadow var(--transition);
}

.software-item:hover {
    box-shadow: var(--shadow-md);
}

.software-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 0.5rem;
}

.software-header h3 {
    font-family: var(--font-mono);
    font-size: 0.95rem;
    font-weight: 700;
    color: var(--color-text);
}

.software-header h3 a {
    color: var(--color-text);
    text-decoration: none;
    border-bottom: 1px solid var(--color-border);
    transition: border-color var(--transition);
}

.software-header h3 a:hover {
    border-bottom-color: var(--color-accent);
    color: var(--color-accent);
}

.software-status {
    font-family: var(--font-sans);
    font-size: 0.68rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    padding: 0.12rem 0.5rem;
    border-radius: 100px;
}

.status-active {
    color: #2a7a4a;
    background: #e8f5e9;
}

.status-archive {
    color: #8a6d3b;
    background: #fdf5e6;
}

.status-dev {
    color: #5a5a6e;
    background: #edf0f5;
}

.software-desc {
    font-size: 0.85rem;
    color: var(--color-text-secondary);
    line-height: 1.55;
    margin-bottom: 0.6rem;
}

.software-meta {
    font-family: var(--font-sans);
    font-size: 0.78rem;
}

.software-meta a {
    color: var(--color-accent);
    text-decoration: none;
}

.software-meta a:hover {
    text-decoration: underline;
}

.software-more {
    font-family: var(--font-sans);
    font-size: 0.85rem;
    color: var(--color-text-muted);
    margin-top: 1.5rem;
}

.software-more a {
    color: var(--color-accent);
    text-decoration: none;
    font-weight: 500;
}

.software-more a:hover {
    text-decoration: underline;
}

/* --- Teaching --- */
.teaching-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
}

.teaching-group h3 {
    font-family: var(--font-sans);
    font-size: 0.88rem;
    font-weight: 700;
    color: var(--color-text);
    margin-bottom: 1rem;
    padding-bottom: 0.4rem;
    border-bottom: 1px solid var(--color-border-light);
}


.teaching-items {
    display: flex;
    flex-direction: column;
    gap: 0.8rem;
}

.teaching-item {
    display: flex;
    flex-direction: column;
    gap: 0.1rem;
}

.teaching-course {
    font-family: var(--font-sans);
    font-size: 0.88rem;
    font-weight: 600;
    color: var(--color-text);
}

.teaching-meta {
    font-family: var(--font-sans);
    font-size: 0.78rem;
    color: var(--color-text-muted);
}

.teaching-highlight {
    font-family: var(--font-sans);
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--color-accent);
}

/* --- Publications --- */
.pub-list {
    display: flex;
    flex-direction: column;
    gap: 0;
}

.pub-item {
    display: grid;
    grid-template-columns: 3.5rem 1fr;
    gap: 1.2rem;
    padding: 1.2rem 0;
    border-bottom: 1px solid var(--color-border-light);
    align-items: start;
}

.pub-item:last-child {
    border-bottom: none;
}

.pub-year {
    font-family: var(--font-mono);
    font-size: 0.82rem;
    font-weight: 600;
    color: var(--color-text-muted);
    padding-top: 0.15rem;
}

.pub-body p {
    margin: 0;
    line-height: 1.5;
}

.pub-title {
    font-family: var(--font-sans);
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--color-text);
    margin-bottom: 0.25rem !important;
}

.pub-meta {
    font-size: 0.85rem;
    color: var(--color-text-secondary);
}

.pub-meta strong {
    color: var(--color-text);
}

.pub-venue {
    font-size: 0.85rem;
    color: var(--color-text-muted);
    margin-top: 0.15rem !important;
}

.pub-venue em {
    font-style: italic;
    color: var(--color-text-secondary);
}

.pub-venue a {
    color: var(--color-accent);
    text-decoration: none;
    font-family: var(--font-sans);
    font-size: 0.78rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.03em;
}

.pub-venue a:hover {
    text-decoration: underline;
}

/* --- Links Grid --- */
.links-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1rem;
}

.link-card {
    display: flex;
    flex-direction: column;
    padding: 1.2rem 1.4rem;
    background: var(--color-surface);
    border: 1px solid var(--color-border-light);
    border-radius: var(--radius);
    text-decoration: none;
    transition: all var(--transition);
}

.link-card:hover {
    border-color: var(--color-accent);
    box-shadow: var(--shadow-md);
    transform: translateY(-1px);
}

.link-card-title {
    font-family: var(--font-sans);
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--color-text);
}

.link-card-desc {
    font-family: var(--font-sans);
    font-size: 0.82rem;
    color: var(--color-text-muted);
    margin-top: 0.15rem;
}

/* --- Footer --- */
.footer {
    padding: 2rem 0;
    border-top: 1px solid var(--color-border-light);
    text-align: center;
}

.footer p {
    font-family: var(--font-sans);
    font-size: 0.82rem;
    color: var(--color-text-muted);
}

/* --- Hamburger Toggle --- */
.nav-toggle {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0.4rem;
    flex-direction: column;
    gap: 4px;
}

.nav-toggle span {
    display: block;
    width: 20px;
    height: 2px;
    background: var(--color-text);
    border-radius: 1px;
    transition: all 0.25s ease;
}

.nav-toggle.active span:nth-child(1) {
    transform: rotate(45deg) translate(4px, 4px);
}

.nav-toggle.active span:nth-child(2) {
    opacity: 0;
}

.nav-toggle.active span:nth-child(3) {
    transform: rotate(-45deg) translate(4px, -4px);
}

/* --- Responsive --- */
@media (max-width: 768px) {
    :root {
        --section-padding: 3rem 0;
    }

    html {
        font-size: 16px;
    }

    .container {
        padding: 0 1.25rem;
    }

    .nav-toggle {
        display: flex;
    }

    .nav-links {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: rgba(255, 255, 255, 0.98);
        backdrop-filter: blur(12px);
        -webkit-backdrop-filter: blur(12px);
        flex-direction: column;
        padding: 1rem 2rem 1.2rem;
        gap: 0.6rem;
        border-bottom: 1px solid var(--color-border-light);
        box-shadow: var(--shadow-md);
    }

    .nav-links.nav-open {
        display: flex;
    }

    .nav-links a {
        font-size: 0.88rem;
        padding: 0.3rem 0;
    }

    .hero {
        padding: 3rem 0 2.5rem;
    }

    .hero-grid {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .hero h1 {
        font-size: 2.2rem;
    }

    .hero-links {
        justify-content: center;
    }

    .hero-photo {
        order: -1;
        display: flex;
        justify-content: center;
    }

    .profile-photo {
        width: 130px;
        height: 130px;
    }

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

    .about-sidebar {
        flex-direction: row;
        flex-wrap: wrap;
        justify-content: center;
        gap: 1.5rem;
    }

    .skills-grid {
        grid-template-columns: 1fr 1fr;
    }

    .software-grid {
        grid-template-columns: 1fr;
    }

    .teaching-grid {
        grid-template-columns: 1fr;
    }

    .links-grid {
        grid-template-columns: 1fr 1fr;
    }

    .pub-item {
        grid-template-columns: 3rem 1fr;
        gap: 0.8rem;
    }
}

@media (max-width: 480px) {
    .hero h1 {
        font-size: 1.8rem;
    }

    .skills-grid,
    .links-grid {
        grid-template-columns: 1fr;
    }
}

/* --- All Publications (collapsible) --- */
.all-pubs {
    margin-top: 2.5rem;
    border: 1px solid var(--color-border-light);
    border-radius: var(--radius);
    background: var(--color-bg-alt);
}

.all-pubs-toggle {
    font-family: var(--font-sans);
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--color-text);
    cursor: pointer;
    padding: 1rem 1.4rem;
    list-style: none;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    transition: color var(--transition);
    user-select: none;
}

.all-pubs-toggle::-webkit-details-marker {
    display: none;
}

.all-pubs-toggle::before {
    content: "";
    display: inline-block;
    width: 0.45em;
    height: 0.45em;
    border-right: 2px solid var(--color-text-secondary);
    border-bottom: 2px solid var(--color-text-secondary);
    transform: rotate(-45deg);
    transition: transform 0.2s ease;
    flex-shrink: 0;
}

.all-pubs[open] > .all-pubs-toggle::before {
    transform: rotate(45deg);
}

.all-pubs-toggle:hover {
    color: var(--color-accent);
}

.all-pubs-list {
    padding: 0.5rem 1.4rem 1.4rem 2.8rem;
    margin: 0;
    counter-reset: none;
}

.all-pubs-entry {
    font-family: var(--font-serif);
    font-size: 0.85rem;
    color: var(--color-text-secondary);
    line-height: 1.6;
    padding: 0.6rem 0;
    border-bottom: 1px solid var(--color-border-light);
}

.all-pubs-entry:last-child {
    border-bottom: none;
    padding-bottom: 0;
}

.all-pubs-entry a {
    color: var(--color-accent);
    text-decoration: none;
    font-size: 0.8rem;
    word-break: break-all;
}

.all-pubs-entry a:hover {
    text-decoration: underline;
}

/* --- Print --- */
@media print {
    .nav { display: none; }
    body { font-size: 11pt; background: white; }
    .hero { background: white; border: none; }
    .section-alt { background: white; }
    a { color: var(--color-text); }
    a[href]::after {
        content: " (" attr(href) ")";
        font-size: 0.8em;
        color: var(--color-text-muted);
    }
    .hero-link::after { display: none; }
    .link-card { border-color: #ccc; box-shadow: none; }
    .skill-card { break-inside: avoid; }
    .all-pubs { border-color: #ccc; }
    .all-pubs[open] { break-inside: avoid; }
    .timeline::before { background: #ccc; }
    .timeline-marker { background: #666; box-shadow: 0 0 0 2px #666; }
}