/* ===== CSS Variables ===== */
:root {
    --bg: #0a0e17;
    --bg-alt: #0f1420;
    --bg-card: #141a28;
    --bg-card-hover: #1a2236;
    --text: #e8ecf4;
    --text-secondary: #a0aec0;
    --text-muted: #6b7a94;
    --primary: #4f8cff;
    --primary-dark: #3b6fd9;
    --primary-glow: rgba(79, 140, 255, 0.15);
    --accent-green: #00c853;    /* Brazilian green touch */
    --accent-gold: #ffc107;     /* Brazilian gold touch */
    --accent-orange: #ff6d00;   /* Dutch orange touch */
    --border: rgba(255, 255, 255, 0.06);
    --border-active: rgba(79, 140, 255, 0.3);
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-mono: 'JetBrains Mono', 'Fira Code', monospace;
    --shadow: 0 4px 24px rgba(0, 0, 0, 0.3);
    --shadow-glow: 0 0 30px rgba(79, 140, 255, 0.08);
    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html { scroll-behavior: smooth; font-size: 16px; }

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

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

a { color: var(--primary); text-decoration: none; transition: color var(--transition); }
a:hover { color: #7db0ff; }

::selection { background: var(--primary); color: #fff; }

/* ===== Topology Canvas ===== */
#topology-canvas {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 1;
    pointer-events: none;
    opacity: 0.5;
}

/* ===== Container ===== */
.container { max-width: 1100px; margin: 0 auto; padding: 0 1.5rem; }

/* ===== Navbar ===== */
.navbar {
    position: fixed;
    top: 0; left: 0; right: 0;
    z-index: 1000;
    background: rgba(10, 14, 23, 0.8);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border);
    transition: box-shadow var(--transition);
}

.navbar.scrolled { box-shadow: 0 4px 30px rgba(0,0,0,0.4); }

.nav-container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 1.5rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 64px;
}

.nav-logo {
    font-weight: 900;
    font-size: 1.2rem;
    color: var(--text);
    letter-spacing: -0.02em;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.logo-node {
    width: 10px; height: 10px;
    border-radius: 50%;
    background: var(--primary);
    box-shadow: 0 0 10px var(--primary), 0 0 20px rgba(79, 140, 255, 0.3);
    animation: pulse-node 2s infinite;
}

@keyframes pulse-node {
    0%, 100% { box-shadow: 0 0 10px var(--primary), 0 0 20px rgba(79, 140, 255, 0.3); }
    50% { box-shadow: 0 0 15px var(--primary), 0 0 35px rgba(79, 140, 255, 0.5); }
}

.nav-logo:hover { color: var(--primary); }

.nav-menu { display: flex; list-style: none; gap: 0.125rem; }

.nav-link {
    display: block;
    padding: 0.5rem 0.65rem;
    font-size: 0.825rem;
    font-weight: 500;
    color: var(--text-secondary);
    border-radius: var(--radius-sm);
    transition: all var(--transition);
}

.nav-link:hover, .nav-link.active {
    color: var(--primary);
    background: var(--primary-glow);
}

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 4px;
}

.nav-toggle span {
    width: 22px; height: 2px;
    background: var(--text);
    border-radius: 2px;
    transition: all var(--transition);
}

/* ===== Hero ===== */
.hero {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    padding-top: 64px;
    position: relative;
    z-index: 2;
}

.hero-container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 2rem 1.5rem;
    display: grid;
    grid-template-columns: 1.3fr 0.7fr;
    gap: 3rem;
    align-items: center;
}

.hero-greeting {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--primary);
    margin-bottom: 0.5rem;
    letter-spacing: 0.1em;
    text-transform: uppercase;
}

.hero-name {
    font-size: clamp(2.5rem, 5vw, 3.75rem);
    font-weight: 900;
    color: #fff;
    line-height: 1.05;
    letter-spacing: -0.04em;
    margin-bottom: 1.25rem;
}

.hero-title {
    font-size: 1.05rem;
    font-weight: 500;
    color: var(--text-secondary);
    margin-bottom: 0.75rem;
    min-height: 1.5em;
    font-family: var(--font-mono);
    font-size: 0.9rem;
}

.hero-title .cursor {
    display: inline-block;
    width: 2px;
    height: 1.1em;
    background: var(--primary);
    margin-left: 2px;
    vertical-align: text-bottom;
    animation: blink 0.8s infinite;
}

@keyframes blink {
    0%, 100% { opacity: 1; }
    50% { opacity: 0; }
}

.hero-subtitle {
    font-size: 0.95rem;
    color: var(--text-muted);
    margin-bottom: 2rem;
    max-width: 520px;
}

.hero-stats {
    display: flex;
    gap: 2.5rem;
    margin-bottom: 2rem;
}

.stat-number {
    font-size: 2rem;
    font-weight: 900;
    color: #fff;
    letter-spacing: -0.02em;
    font-variant-numeric: tabular-nums;
    display: block;
}

.stat-number::after { content: '+'; font-size: 0.6em; color: var(--primary); }

.stat-label {
    font-size: 0.75rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    font-weight: 500;
}

.hero-actions { display: flex; gap: 0.75rem; margin-bottom: 1.5rem; }

.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    padding: 0.7rem 1.5rem;
    border-radius: var(--radius-md);
    font-size: 0.875rem;
    font-weight: 600;
    transition: all var(--transition);
    cursor: pointer;
    border: none;
}

.btn-primary {
    background: var(--primary);
    color: #fff;
    box-shadow: 0 2px 12px rgba(79, 140, 255, 0.35);
}

.btn-primary:hover {
    background: #6ba1ff;
    color: #fff;
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(79, 140, 255, 0.45);
}

.btn-outline {
    background: transparent;
    color: var(--text);
    border: 1.5px solid var(--border-active);
}

.btn-outline:hover {
    border-color: var(--primary);
    color: var(--primary);
    transform: translateY(-2px);
}

.btn-note { font-size: 0.7rem; opacity: 0.6; }

.hero-social {
    display: flex;
    gap: 0.75rem;
}

.hero-social a {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 36px; height: 36px;
    border-radius: 50%;
    background: var(--bg-card);
    border: 1px solid var(--border);
    color: var(--text-secondary);
    transition: all var(--transition);
}

.hero-social a:hover {
    color: var(--primary);
    border-color: var(--primary);
    background: var(--primary-glow);
    transform: translateY(-2px);
}

.hero-image { position: relative; }

.hero-image-wrapper {
    width: 280px;
    height: 280px;
    margin-left: auto;
    border-radius: 50%;
    overflow: hidden;
    border: 3px solid var(--border-active);
    box-shadow: 0 0 40px rgba(79, 140, 255, 0.15), var(--shadow);
}

.hero-image-wrapper img { width: 100%; height: 100%; object-fit: cover; }

.hero-location {
    display: flex;
    align-items: center;
    gap: 0.4rem;
    justify-content: center;
    margin-top: 1rem;
    font-size: 0.8rem;
    color: var(--text-muted);
}

.hero-scroll {
    position: absolute;
    bottom: 2rem; left: 50%;
    transform: translateX(-50%);
    animation: bounce 2s infinite;
    z-index: 1;
}

.hero-scroll a { color: var(--text-muted); }

@keyframes bounce {
    0%, 20%, 50%, 80%, 100% { transform: translateX(-50%) translateY(0); }
    40% { transform: translateX(-50%) translateY(-8px); }
    60% { transform: translateX(-50%) translateY(-4px); }
}

/* ===== Sections ===== */
.section { padding: 5rem 0; position: relative; z-index: 2; background: rgba(10, 14, 23, 0.93); }
.section-alt { background: rgba(15, 20, 32, 0.93); }

.section-title {
    font-size: 2rem;
    font-weight: 900;
    color: #fff;
    margin-bottom: 0.75rem;
    letter-spacing: -0.02em;
}

.title-accent {
    color: var(--primary);
    font-family: var(--font-mono);
    margin-right: 0.3rem;
}

.section-subtitle {
    font-size: 0.95rem;
    color: var(--text-muted);
    margin-bottom: 2.5rem;
}

.section-subtitle a { font-weight: 600; }

/* ===== About ===== */
.about-grid {
    display: grid;
    grid-template-columns: 1.2fr 1fr;
    gap: 3rem;
    margin-top: 2rem;
}

.about-text p { margin-bottom: 1rem; color: var(--text-secondary); }
.about-text strong { color: var(--text); }
.about-text em { color: var(--text-secondary); font-style: italic; }

.detail-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 1.25rem;
    margin-bottom: 0.75rem;
    transition: border-color var(--transition);
}

.detail-card:hover { border-color: var(--border-active); }

.detail-card-highlight {
    border-color: var(--accent-orange);
    background: linear-gradient(135deg, var(--bg-card) 0%, rgba(255, 109, 0, 0.05) 100%);
}

.detail-card h3 {
    font-size: 0.8rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--text-muted);
    margin-bottom: 0.75rem;
}

.detail-card-highlight p { font-size: 0.9rem; color: var(--text-secondary); }

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

.tag {
    padding: 0.3rem 0.65rem;
    background: var(--primary-glow);
    color: var(--primary);
    font-size: 0.75rem;
    font-weight: 500;
    border-radius: 100px;
    border: 1px solid rgba(79, 140, 255, 0.15);
}

.languages-grid { display: flex; flex-direction: column; gap: 0.35rem; }

.language {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.3rem 0;
    border-bottom: 1px solid var(--border);
}

.language:last-child { border-bottom: none; }
.lang-name { font-weight: 500; font-size: 0.85rem; }
.lang-level { font-size: 0.75rem; color: var(--text-muted); font-family: var(--font-mono); }

/* ===== Story ===== */
.story-timeline { margin-top: 2rem; }

.story-chapter {
    position: relative;
    padding-left: 3rem;
    margin-bottom: 3rem;
    border-left: 2px solid var(--border);
}

.story-chapter:last-child { margin-bottom: 0; }

.story-chapter::before {
    content: '';
    position: absolute;
    left: -7px; top: 0;
    width: 12px; height: 12px;
    border-radius: 50%;
    background: var(--bg);
    border: 3px solid var(--primary);
}

.story-chapter:first-child::before {
    background: var(--primary);
    box-shadow: 0 0 12px rgba(79, 140, 255, 0.5);
}

.story-chapter-header {
    display: flex;
    align-items: baseline;
    gap: 1rem;
    margin-bottom: 0.75rem;
}

.story-year {
    font-family: var(--font-mono);
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--primary);
    padding: 0.15rem 0.5rem;
    background: var(--primary-glow);
    border-radius: var(--radius-sm);
    flex-shrink: 0;
}

.story-chapter-header h3 {
    font-size: 1.25rem;
    font-weight: 700;
    color: #fff;
}

.story-chapter-body p {
    color: var(--text-secondary);
    margin-bottom: 1rem;
    font-size: 0.925rem;
}

.story-chapter-body strong { color: var(--text); }

.story-cta {
    padding: 1rem 1.25rem;
    background: linear-gradient(135deg, var(--primary-glow) 0%, rgba(255, 109, 0, 0.05) 100%);
    border: 1px solid var(--border-active);
    border-radius: var(--radius-md);
    font-weight: 500;
    color: var(--text) !important;
}

.story-gallery {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
    margin-top: 1rem;
    margin-bottom: 0.5rem;
}

.story-img {
    border-radius: var(--radius-md);
    overflow: hidden;
    cursor: pointer;
    transition: transform var(--transition);
}

.story-img:hover { transform: scale(1.02); }

.story-img img {
    width: 100%;
    height: 180px;
    object-fit: cover;
    transition: transform var(--transition);
}

.story-img:hover img { transform: scale(1.05); }

.story-img-caption {
    font-size: 0.75rem;
    color: var(--text-muted);
    padding: 0.5rem;
    text-align: center;
}

/* placeholder class removed — all images now wired in */

/* ===== Timeline (Experience) ===== */
.timeline {
    position: relative;
    margin-top: 2rem;
    padding-left: 2rem;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 7px; top: 8px; bottom: 8px;
    width: 2px;
    background: var(--border);
}

.timeline-item {
    position: relative;
    margin-bottom: 1.5rem;
}

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

.timeline-marker {
    position: absolute;
    left: -2rem; top: 6px;
    width: 16px; height: 16px;
    border-radius: 50%;
    background: var(--bg);
    border: 3px solid var(--text-muted);
    z-index: 1;
    transition: all var(--transition);
}

.timeline-marker.current {
    border-color: var(--primary);
    background: var(--primary);
    box-shadow: 0 0 12px rgba(79, 140, 255, 0.5);
}

.timeline-content {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 1.25rem;
    transition: all var(--transition);
}

.timeline-content:hover {
    border-color: var(--border-active);
    box-shadow: var(--shadow-glow);
}

.timeline-header h3 {
    font-size: 1rem;
    font-weight: 700;
    color: #fff;
    margin-bottom: 0.2rem;
}

.timeline-company {
    display: block;
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--primary);
    margin-bottom: 0.2rem;
}

.timeline-date {
    display: block;
    font-size: 0.75rem;
    color: var(--text-muted);
    font-family: var(--font-mono);
    margin-bottom: 0.5rem;
}

.timeline-content > p { color: var(--text-secondary); font-size: 0.875rem; }

/* ===== Education ===== */
.education-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1rem;
    margin-top: 2rem;
}

.edu-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 1.25rem;
    transition: all var(--transition);
    position: relative;
    overflow: hidden;
}

.edu-card:hover {
    border-color: var(--border-active);
    transform: translateY(-2px);
    box-shadow: var(--shadow-glow);
}

.edu-card-featured { border-color: var(--border-active); }

/* Country flag indicators */
.edu-flag {
    width: 100%;
    height: 3px;
    border-radius: 3px 3px 0 0;
    position: absolute;
    top: 0; left: 0;
}

.flag-br { background: linear-gradient(90deg, var(--accent-green) 50%, var(--accent-gold) 50%); }
.flag-nl { background: linear-gradient(180deg, #ae1c28 33%, #fff 33% 66%, #21468b 66%); height: 4px; }
.flag-be { background: linear-gradient(90deg, #000 33%, #ffd700 33% 66%, #ff0000 66%); }
.flag-us { background: linear-gradient(90deg, #3c3b6e 40%, #b22234 40%); }
.flag-hk { background: linear-gradient(90deg, #de2910 100%, #de2910 100%); }

.edu-card h3 {
    font-size: 0.95rem;
    font-weight: 700;
    color: #fff;
    margin-bottom: 0.35rem;
    margin-top: 0.25rem;
}

.edu-institution { font-size: 0.825rem; font-weight: 500; color: var(--primary); margin-bottom: 0.25rem; }
.edu-date { font-size: 0.75rem; color: var(--text-muted); font-family: var(--font-mono); margin-bottom: 0.4rem; }

.edu-note {
    font-size: 0.8rem;
    color: var(--text-secondary);
    font-style: italic;
    padding-top: 0.4rem;
    border-top: 1px solid var(--border);
}

/* ===== Publications ===== */
.pub-filter {
    display: flex;
    gap: 0.4rem;
    margin-bottom: 1.5rem;
    flex-wrap: wrap;
}

.pub-filter-btn {
    padding: 0.35rem 0.9rem;
    border: 1px solid var(--border);
    border-radius: 100px;
    background: transparent;
    color: var(--text-secondary);
    font-size: 0.8rem;
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition);
    font-family: var(--font-sans);
}

.pub-filter-btn:hover { border-color: var(--primary); color: var(--primary); }

.pub-filter-btn.active {
    background: var(--primary);
    border-color: var(--primary);
    color: #fff;
}

.publications-list { display: flex; flex-direction: column; gap: 0.6rem; }

.pub-item {
    display: flex;
    gap: 1.25rem;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 1.1rem 1.25rem;
    transition: all var(--transition);
}

.pub-item.hidden { display: none; }

.pub-item:hover {
    border-color: var(--border-active);
    box-shadow: var(--shadow-glow);
}

.pub-highlight {
    border-color: var(--primary);
    background: linear-gradient(135deg, var(--bg-card) 0%, rgba(79, 140, 255, 0.05) 100%);
}

.pub-wip { border-style: dashed; opacity: 0.8; }

.pub-year {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    font-weight: 500;
    color: var(--text-muted);
    min-width: 2.5rem;
    padding-top: 0.15rem;
}

.pub-details h3 { font-size: 0.9rem; font-weight: 600; color: var(--text); margin-bottom: 0.3rem; line-height: 1.4; }
.pub-details h3 a { color: var(--text); }
.pub-details h3 a:hover { color: var(--primary); }
.pub-authors { font-size: 0.75rem; color: var(--text-secondary); margin-bottom: 0.15rem; }
.pub-journal { font-size: 0.75rem; color: var(--text-muted); font-style: italic; }

.pub-citations {
    display: inline-block;
    margin-top: 0.4rem;
    padding: 0.15rem 0.5rem;
    background: var(--primary-glow);
    color: var(--primary);
    font-size: 0.7rem;
    font-weight: 600;
    border-radius: 100px;
    font-family: var(--font-mono);
}

.pub-wip-badge {
    display: inline-block;
    margin-top: 0.4rem;
    margin-left: 0.4rem;
    padding: 0.15rem 0.5rem;
    background: rgba(255, 193, 7, 0.1);
    color: var(--accent-gold);
    font-size: 0.7rem;
    font-weight: 600;
    border-radius: 100px;
    font-family: var(--font-mono);
}

/* ===== Awards ===== */
.awards-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1rem;
    margin-top: 2rem;
}

.award-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 1.25rem;
    position: relative;
    transition: all var(--transition);
}

.award-card:hover {
    border-color: var(--border-active);
    transform: translateY(-2px);
    box-shadow: var(--shadow-glow);
}

.award-major { border-color: var(--accent-gold); }
.award-major:hover { border-color: var(--accent-gold); box-shadow: 0 0 20px rgba(255, 193, 7, 0.1); }

.award-ribbon {
    position: absolute;
    top: 0.75rem; right: 0.75rem;
    font-family: var(--font-mono);
    font-size: 0.7rem;
    font-weight: 600;
    color: var(--accent-gold);
    background: rgba(255, 193, 7, 0.1);
    padding: 0.15rem 0.5rem;
    border-radius: 100px;
}

.award-card h3 { font-size: 0.95rem; font-weight: 700; color: #fff; margin-bottom: 0.25rem; padding-right: 3.5rem; }
.award-org { font-size: 0.8rem; color: var(--primary); font-weight: 500; }

.award-image {
    margin-top: 0.75rem;
    border-radius: var(--radius-md);
    overflow: hidden;
    cursor: pointer;
}

.award-image img {
    border-radius: var(--radius-md);
    width: 100%;
    transition: transform var(--transition);
}

.award-image:hover img { transform: scale(1.03); }

/* ===== Conferences ===== */
.conferences-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1rem;
    margin-top: 2rem;
}

.conf-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    overflow: hidden;
    transition: all var(--transition);
}

.conf-card:hover {
    border-color: var(--border-active);
    box-shadow: var(--shadow-glow);
    transform: translateY(-2px);
}

.conf-image { width: 100%; height: 180px; overflow: hidden; }

.conf-image img {
    width: 100%; height: 100%;
    object-fit: cover;
    transition: transform var(--transition);
    cursor: pointer;
}

.conf-card:hover .conf-image img { transform: scale(1.05); }

.conf-info { padding: 1.1rem; }
.conf-info-only { padding: 1.5rem 1.1rem; }

.conf-info h3 { font-size: 0.95rem; font-weight: 700; color: #fff; margin-bottom: 0.3rem; }
.conf-talk { font-size: 0.825rem; color: var(--text-secondary); font-style: italic; margin-bottom: 0.4rem; line-height: 1.5; }
.conf-location { font-size: 0.75rem; color: var(--text-muted); font-family: var(--font-mono); }

/* ===== Skills ===== */
.skills-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1rem;
    margin-top: 2rem;
}

.skill-category {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 1.25rem;
}

.skill-category h3 {
    font-size: 0.8rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--text-muted);
    margin-bottom: 1rem;
    padding-bottom: 0.5rem;
    border-bottom: 2px solid var(--primary-glow);
}

.skill-items { display: flex; flex-direction: column; gap: 0.6rem; }

.skill-item {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.skill-name { font-size: 0.85rem; font-weight: 500; min-width: 90px; }

.skill-bar {
    flex: 1;
    height: 6px;
    background: var(--border);
    border-radius: 3px;
    position: relative;
    overflow: hidden;
}

.skill-bar::after {
    content: '';
    position: absolute;
    left: 0; top: 0; bottom: 0;
    width: 0;
    background: linear-gradient(90deg, var(--primary), #7db0ff);
    border-radius: 3px;
    transition: width 1s cubic-bezier(0.4, 0, 0.2, 1);
}

.skill-bar.animated::after { width: var(--bar-width); }

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

.skill-tag {
    padding: 0.3rem 0.65rem;
    background: var(--primary-glow);
    color: var(--primary);
    font-size: 0.75rem;
    font-weight: 500;
    border-radius: 100px;
    border: 1px solid rgba(79, 140, 255, 0.12);
}

/* ===== Social / Community ===== */
.social-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 1.5rem;
    max-width: 700px;
    margin-top: 1.5rem;
}

.social-card h3 { font-size: 1rem; font-weight: 700; color: #fff; margin-bottom: 0.25rem; }
.social-org { font-size: 0.85rem; color: var(--primary); font-weight: 500; margin-bottom: 0.5rem; }
.social-card > p { color: var(--text-secondary); font-size: 0.875rem; }

.social-image {
    margin-top: 1rem;
    border-radius: var(--radius-md);
    overflow: hidden;
    max-height: 220px;
}

.social-image img {
    width: 100%;
    height: 220px;
    object-fit: cover;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: transform var(--transition);
}

.social-image img:hover { transform: scale(1.03); }

/* ===== Contact ===== */
#contact { text-align: center; }

.contact-subtitle { margin-bottom: 2rem; }

.contact-grid {
    display: flex;
    justify-content: center;
    gap: 0.75rem;
    flex-wrap: wrap;
}

.contact-card {
    display: flex;
    align-items: center;
    gap: 0.6rem;
    padding: 0.85rem 1.25rem;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    color: var(--text-secondary);
    transition: all var(--transition);
    font-size: 0.85rem;
    font-weight: 500;
}

.contact-card:hover {
    border-color: var(--primary);
    color: var(--primary);
    box-shadow: var(--shadow-glow);
    transform: translateY(-2px);
}

.contact-card svg { flex-shrink: 0; }

/* ===== Footer ===== */
.footer {
    background: var(--bg);
    border-top: 1px solid var(--border);
    color: var(--text-muted);
    padding: 1.5rem 0;
    text-align: center;
    font-size: 0.8rem;
    position: relative;
    z-index: 2;
}

/* ===== Lightbox ===== */
.lightbox {
    position: fixed;
    top: 0; left: 0; right: 0; bottom: 0;
    z-index: 9999;
    background: rgba(0, 0, 0, 0.92);
    display: none;
    align-items: center;
    justify-content: center;
    flex-direction: column;
    padding: 2rem;
    cursor: pointer;
}

.lightbox.active { display: flex; }

.lightbox-close {
    position: absolute;
    top: 1rem; right: 1.5rem;
    font-size: 2rem;
    color: #fff;
    background: none;
    border: none;
    cursor: pointer;
    z-index: 10;
}

.lightbox-img {
    max-width: 90vw;
    max-height: 80vh;
    object-fit: contain;
    border-radius: var(--radius-md);
}

.lightbox-caption {
    color: var(--text-muted);
    font-size: 0.85rem;
    margin-top: 1rem;
    text-align: center;
}

/* ===== Scroll Animations ===== */
.fade-in {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}

.fade-in.visible { opacity: 1; transform: translateY(0); }

/* ===== Responsive ===== */
@media (max-width: 768px) {
    .nav-menu {
        display: none;
        position: absolute;
        top: 64px; left: 0; right: 0;
        background: var(--bg);
        flex-direction: column;
        padding: 1rem;
        border-bottom: 1px solid var(--border);
        box-shadow: 0 10px 30px rgba(0,0,0,0.5);
    }

    .nav-menu.active { display: flex; }
    .nav-toggle { display: flex; }

    .nav-toggle.active span:nth-child(1) { transform: rotate(45deg) translate(5px, 5px); }
    .nav-toggle.active span:nth-child(2) { opacity: 0; }
    .nav-toggle.active span:nth-child(3) { transform: rotate(-45deg) translate(5px, -5px); }

    .hero-container { grid-template-columns: 1fr; gap: 2rem; text-align: center; }
    .hero-image { order: -1; }
    .hero-image-wrapper { width: 200px; height: 200px; margin: 0 auto; }
    .hero-stats { justify-content: center; }
    .hero-actions { justify-content: center; }
    .hero-social { justify-content: center; }
    .hero-subtitle { margin: 0 auto 2rem; }

    .about-grid { grid-template-columns: 1fr; }
    .education-grid, .awards-grid, .conferences-grid, .skills-grid { grid-template-columns: 1fr; }
    .story-gallery { grid-template-columns: 1fr; }

    .pub-item { flex-direction: column; gap: 0.2rem; }

    .section { padding: 3.5rem 0; }
    .section-title { font-size: 1.6rem; }
}

@media (max-width: 480px) {
    .hero-name { font-size: 2rem; }
    .hero-stats { gap: 1.5rem; }
    .stat-number { font-size: 1.5rem; }
    .hero-actions { flex-direction: column; align-items: center; }
    .btn { width: 100%; justify-content: center; }
    .contact-grid { flex-direction: column; align-items: stretch; }
    .pub-filter { gap: 0.3rem; }
    .pub-filter-btn { font-size: 0.7rem; padding: 0.3rem 0.6rem; }
}